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428
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1 /* Evaluator for XEmacs Lisp interpreter.
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2 Copyright (C) 1985-1987, 1992-1994 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Sun Microsystems, Inc.
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2421
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4 Copyright (C) 2000, 2001, 2002, 2003, 2004 Ben Wing.
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428
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5
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6 This file is part of XEmacs.
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7
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8 XEmacs is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 2, or (at your option) any
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11 later version.
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12
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13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with XEmacs; see the file COPYING. If not, write to
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA. */
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22
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23 /* Synched up with: FSF 19.30 (except for Fsignal), Mule 2.0. */
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24
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853
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25 /* Authorship:
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26
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27 Based on code from pre-release FSF 19, c. 1991.
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28 Some work by Richard Mlynarik long ago (c. 1993?) --
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29 added call-with-condition-handler; synch. up to released FSF 19.7
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30 for lemacs 19.8. some signal changes.
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31 Various work by Ben Wing, 1995-1996:
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32 added all stuff dealing with trapping errors, suspended-errors, etc.
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33 added most Fsignal front ends.
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34 added warning code.
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35 reworked the Fsignal code and synched the rest up to FSF 19.30.
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36 Some changes by Martin Buchholz c. 1999?
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37 e.g. PRIMITIVE_FUNCALL macros.
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38 New call_trapping_problems code and large comments below
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39 by Ben Wing, Mar-Apr 2000.
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40 */
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41
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42 /* This file has been Mule-ized. */
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43
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44 /* What is in this file?
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45
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46 This file contains the engine for the ELisp interpreter in XEmacs.
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47 The engine does the actual work of implementing function calls,
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48 form evaluation, non-local exits (catch, throw, signal,
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49 condition-case, call-with-condition-handler), unwind-protects,
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50 dynamic bindings, let constructs, backtraces, etc. You might say
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51 that this module is the very heart of XEmacs, and everything else
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52 in XEmacs is merely an auxiliary module implementing some specific
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53 functionality that may be called from the heart at an appropriate
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54 time.
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55
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56 The only exception is the alloc.c module, which implements the
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57 framework upon which this module (eval.c) works. alloc.c works
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58 with creating the actual Lisp objects themselves and garbage
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1960
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59 collecting them as necessary, presenting a nice, high-level
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853
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60 interface for object creation, deletion, access, and modification.
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61
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62 The only other exception that could be cited is the event-handling
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63 module in event-stream.c. From its perspective, it is also the
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64 heart of XEmacs, and controls exactly what gets done at what time.
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65 From its perspective, eval.c is merely one of the auxiliary modules
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66 out there that can be invoked by event-stream.c.
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67
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68 Although the event-stream-centric view is a convenient fiction that
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69 makes sense particularly from the user's perspective and from the
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70 perspective of time, the engine-centric view is actually closest to
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71 the truth, because anywhere within the event-stream module, you are
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72 still somewhere in a Lisp backtrace, and event-loops are begun by
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73 functions such as `command-loop-1', a Lisp function.
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74
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75 As the Lisp engine is doing its thing, it maintains the state of
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1960
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76 the engine primarily in five list-like items, which are:
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853
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77
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78 -- the backtrace list
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79 -- the catchtag list
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80 -- the condition-handler list
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81 -- the specbind list
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82 -- the GCPRO list.
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83
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84 These are described in detail in the next comment.
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85
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86 --ben
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87 */
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88
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89 /* Note that there are five separate lists used to maintain state in
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90 the evaluator. All of them conceptually are stacks (last-in,
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91 first-out). All non-local exits happen ultimately through the
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92 catch/throw mechanism, which uses one of the five lists (the
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93 catchtag list) and records the current state of the others in each
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94 frame of the list (some other information is recorded and restored
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95 as well, such as the current eval depth), so that all the state of
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96 the evaluator is restored properly when a non-local exit occurs.
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97 (Note that the current state of the condition-handler list is not
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98 recorded in the catchtag list. Instead, when a condition-case or
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99 call-with-condition-handler is set up, it installs an
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100 unwind-protect on the specbind list to restore the appropriate
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101 setting for the condition-handler list. During the course of
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102 handling the non-local exit, all entries on the specbind list that
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103 are past the location stored in the catch frame are "unwound"
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104 (i.e. variable bindings are restored and unwind-protects are
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105 executed), so the condition-handler list gets reset properly.
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106
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107 The five lists are
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108
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109 1. The backtrace list, which is chained through `struct backtrace's
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110 declared in the stack frames of various primitives, and keeps
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111 track of all Lisp function call entries and exits.
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112 2. The catchtag list, which is chained through `struct catchtag's
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113 declared in the stack frames of internal_catch and condition_case_1,
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114 and keeps track of information needed to reset the internal state
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115 of the evaluator to the state that was current when the catch or
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116 condition-case were established, in the event of a non-local exit.
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117 3. The condition-handler list, which is a simple Lisp list with new
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118 entries consed onto the front of the list. It records condition-cases
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119 and call-with-condition-handlers established either from C or from
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120 Lisp. Unlike with the other lists (but similar to everything else
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121 of a similar nature in the rest of the C and Lisp code), it takes care
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122 of restoring itself appropriately in the event of a non-local exit
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123 through the use of the unwind-protect mechanism.
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124 4. The specbind list, which is a contiguous array of `struct specbinding's,
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125 expanded as necessary using realloc(). It holds dynamic variable
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126 bindings (the only kind we currently have in ELisp) and unwind-protects.
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127 5. The GCPRO list, which is chained through `struct gcpro's declared in
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128 the stack frames of any functions that need to GC-protect Lisp_Objects
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129 declared on the stack. This is one of the most fragile areas of the
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130 entire scheme -- you must not forget to UNGCPRO at the end of your
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131 function, you must make sure you GCPRO in many circumstances you don't
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132 think you have to, etc. See the internals manual for more information
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133 about this.
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134
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135 --ben
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136 */
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137
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428
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138 #include <config.h>
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139 #include "lisp.h"
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140
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141 #include "commands.h"
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142 #include "backtrace.h"
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143 #include "bytecode.h"
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144 #include "buffer.h"
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872
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145 #include "console-impl.h"
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853
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146 #include "device.h"
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147 #include "frame.h"
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148 #include "lstream.h"
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428
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149 #include "opaque.h"
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1292
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150 #include "profile.h"
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853
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151 #include "window.h"
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428
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152
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153 struct backtrace *backtrace_list;
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154
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155 /* Macros for calling subrs with an argument list whose length is only
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156 known at runtime. See EXFUN and DEFUN for similar hackery. */
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157
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158 #define AV_0(av)
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159 #define AV_1(av) av[0]
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160 #define AV_2(av) AV_1(av), av[1]
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161 #define AV_3(av) AV_2(av), av[2]
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162 #define AV_4(av) AV_3(av), av[3]
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163 #define AV_5(av) AV_4(av), av[4]
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164 #define AV_6(av) AV_5(av), av[5]
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165 #define AV_7(av) AV_6(av), av[6]
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166 #define AV_8(av) AV_7(av), av[7]
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167
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168 #define PRIMITIVE_FUNCALL_1(fn, av, ac) \
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444
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169 (((Lisp_Object (*)(EXFUN_##ac)) (fn)) (AV_##ac (av)))
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428
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170
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171 /* If subrs take more than 8 arguments, more cases need to be added
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172 to this switch. (But wait - don't do it - if you really need
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173 a SUBR with more than 8 arguments, use max_args == MANY.
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853
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174 Or better, considering using a property list as one of your args.
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428
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175 See the DEFUN macro in lisp.h) */
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176 #define PRIMITIVE_FUNCALL(rv, fn, av, ac) do { \
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177 void (*PF_fn)(void) = (void (*)(void)) fn; \
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178 Lisp_Object *PF_av = (av); \
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179 switch (ac) \
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180 { \
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436
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181 default:rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 0); break; \
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428
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182 case 1: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 1); break; \
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183 case 2: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 2); break; \
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184 case 3: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 3); break; \
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185 case 4: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 4); break; \
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186 case 5: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 5); break; \
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187 case 6: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 6); break; \
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188 case 7: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 7); break; \
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189 case 8: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 8); break; \
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190 } \
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191 } while (0)
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192
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193 #define FUNCALL_SUBR(rv, subr, av, ac) \
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194 PRIMITIVE_FUNCALL (rv, subr_function (subr), av, ac);
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195
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196
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197 /* This is the list of current catches (and also condition-cases).
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853
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198 This is a stack: the most recent catch is at the head of the list.
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199 The list is threaded through the stack frames of the C functions
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200 that set up the catches; this is similar to the way the GCPRO list
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201 is handled, but different from the condition-handler list (which is
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202 a simple Lisp list) and the specbind stack, which is a contiguous
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203 array of `struct specbinding's, grown (using realloc()) as
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204 necessary. (Note that all four of these lists behave as a stacks.)
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205
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3025
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206 Catches are created by declaring a `struct catchtag' locally,
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853
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207 filling the .TAG field in with the tag, and doing a setjmp() on
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208 .JMP. Fthrow() will store the value passed to it in .VAL and
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209 longjmp() back to .JMP, back to the function that established the
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210 catch. This will always be either internal_catch() (catches
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211 established internally or through `catch') or condition_case_1
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212 (condition-cases established internally or through
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213 `condition-case').
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428
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214
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215 The catchtag also records the current position in the
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216 call stack (stored in BACKTRACE_LIST), the current position
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217 in the specpdl stack (used for variable bindings and
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218 unwind-protects), the value of LISP_EVAL_DEPTH, and the
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219 current position in the GCPRO stack. All of these are
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220 restored by Fthrow().
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853
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221 */
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428
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222
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223 struct catchtag *catchlist;
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224
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853
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225 /* A special tag that can be used internally from C code to catch
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226 every attempt to throw past this level. */
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227 Lisp_Object Vcatch_everything_tag;
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228
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428
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229 Lisp_Object Qautoload, Qmacro, Qexit;
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230 Lisp_Object Qinteractive, Qcommandp, Qdefun, Qprogn, Qvalues;
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231 Lisp_Object Vquit_flag, Vinhibit_quit;
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232 Lisp_Object Qand_rest, Qand_optional;
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233 Lisp_Object Qdebug_on_error, Qstack_trace_on_error;
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234 Lisp_Object Qdebug_on_signal, Qstack_trace_on_signal;
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235 Lisp_Object Qdebugger;
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236 Lisp_Object Qinhibit_quit;
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887
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237 Lisp_Object Qfinalize_list;
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428
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238 Lisp_Object Qrun_hooks;
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239 Lisp_Object Qsetq;
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240 Lisp_Object Qdisplay_warning;
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241 Lisp_Object Vpending_warnings, Vpending_warnings_tail;
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242 Lisp_Object Qif;
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243
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853
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244 /* Flags specifying which operations are currently inhibited. */
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245 int inhibit_flags;
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246
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247 /* Buffers, frames, windows, devices, and consoles created since most
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248 recent active
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249 call_trapping_problems (INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION).
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250 */
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251 Lisp_Object Vdeletable_permanent_display_objects;
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252
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253 /* Buffers created since most recent active
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254 call_trapping_problems (INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION). */
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255 Lisp_Object Vmodifiable_buffers;
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793
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256
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257 /* Minimum level at which warnings are logged. Below this, they're ignored
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258 entirely -- not even generated. */
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259 Lisp_Object Vlog_warning_minimum_level;
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260
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428
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261 /* Non-nil means record all fset's and provide's, to be undone
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262 if the file being autoloaded is not fully loaded.
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263 They are recorded by being consed onto the front of Vautoload_queue:
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264 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */
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265 Lisp_Object Vautoload_queue;
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266
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267 /* Current number of specbindings allocated in specpdl. */
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268 int specpdl_size;
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269
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270 /* Pointer to beginning of specpdl. */
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271 struct specbinding *specpdl;
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272
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273 /* Pointer to first unused element in specpdl. */
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274 struct specbinding *specpdl_ptr;
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275
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276 /* specpdl_ptr - specpdl */
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277 int specpdl_depth_counter;
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278
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279 /* Maximum size allowed for specpdl allocation */
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458
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280 Fixnum max_specpdl_size;
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428
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281
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282 /* Depth in Lisp evaluations and function calls. */
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1292
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283 int lisp_eval_depth;
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428
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284
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285 /* Maximum allowed depth in Lisp evaluations and function calls. */
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458
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286 Fixnum max_lisp_eval_depth;
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428
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287
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288 /* Nonzero means enter debugger before next function call */
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289 static int debug_on_next_call;
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290
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1292
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291 int backtrace_with_internal_sections;
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292
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428
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293 /* List of conditions (non-nil atom means all) which cause a backtrace
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294 if an error is handled by the command loop's error handler. */
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295 Lisp_Object Vstack_trace_on_error;
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296
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297 /* List of conditions (non-nil atom means all) which enter the debugger
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298 if an error is handled by the command loop's error handler. */
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299 Lisp_Object Vdebug_on_error;
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300
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301 /* List of conditions and regexps specifying error messages which
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302 do not enter the debugger even if Vdebug_on_error says they should. */
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303 Lisp_Object Vdebug_ignored_errors;
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304
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305 /* List of conditions (non-nil atom means all) which cause a backtrace
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306 if any error is signalled. */
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307 Lisp_Object Vstack_trace_on_signal;
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308
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309 /* List of conditions (non-nil atom means all) which enter the debugger
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310 if any error is signalled. */
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311 Lisp_Object Vdebug_on_signal;
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312
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313 /* Nonzero means enter debugger if a quit signal
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314 is handled by the command loop's error handler.
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315
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316 From lisp, this is a boolean variable and may have the values 0 and 1.
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317 But, eval.c temporarily uses the second bit of this variable to indicate
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318 that a critical_quit is in progress. The second bit is reset immediately
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319 after it is processed in signal_call_debugger(). */
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320 int debug_on_quit;
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321
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322 #if 0 /* FSFmacs */
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323 /* entering_debugger is basically equivalent */
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324 /* The value of num_nonmacro_input_chars as of the last time we
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325 started to enter the debugger. If we decide to enter the debugger
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326 again when this is still equal to num_nonmacro_input_chars, then we
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327 know that the debugger itself has an error, and we should just
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328 signal the error instead of entering an infinite loop of debugger
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329 invocations. */
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330 int when_entered_debugger;
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331 #endif
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332
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333 /* Nonzero means we are trying to enter the debugger.
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334 This is to prevent recursive attempts.
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335 Cleared by the debugger calling Fbacktrace */
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336 static int entering_debugger;
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337
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338 /* Function to call to invoke the debugger */
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339 Lisp_Object Vdebugger;
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340
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853
|
341 /* List of condition handlers currently in effect.
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342 The elements of this lists were at one point in the past
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343 threaded through the stack frames of Fcondition_case and
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344 related functions, but now are stored separately in a normal
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345 stack. When an error is signaled (by calling Fsignal, below),
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346 this list is searched for an element that applies.
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428
|
347
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|
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348 Each element of this list is one of the following:
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349
|
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853
|
350 -- A list of a handler function and possibly args to pass to the
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351 function. This is a handler established with the Lisp primitive
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352 `call-with-condition-handler' or related C function
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353 call_with_condition_handler():
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354
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355 If the handler function is an opaque ptr object, it is a handler
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356 that was established in C using call_with_condition_handler(),
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357 and the contents of the object are a function pointer which takes
|
|
|
358 three arguments, the signal name and signal data (same arguments
|
|
|
359 passed to `signal') and a third Lisp_Object argument, specified
|
|
|
360 in the call to call_with_condition_handler() and stored as the
|
|
|
361 second element of the list containing the handler functionl.
|
|
|
362
|
|
|
363 If the handler function is a regular Lisp_Object, it is a handler
|
|
|
364 that was established using `call-with-condition-handler'.
|
|
|
365 Currently there are no more arguments in the list containing the
|
|
|
366 handler function, and only one argument is passed to the handler
|
|
|
367 function: a cons of the signal name and signal data arguments
|
|
|
368 passed to `signal'.
|
|
|
369
|
|
|
370 -- A list whose car is Qunbound and whose cdr is Qt. This is a
|
|
|
371 special condition-case handler established by C code with
|
|
|
372 condition_case_1(). All errors are trapped; the debugger is not
|
|
|
373 invoked even if `debug-on-error' was set.
|
|
|
374
|
|
|
375 -- A list whose car is Qunbound and whose cdr is Qerror. This is a
|
|
|
376 special condition-case handler established by C code with
|
|
|
377 condition_case_1(). It is like Qt except that the debugger is
|
|
|
378 invoked normally if it is called for.
|
|
|
379
|
|
|
380 -- A list whose car is Qunbound and whose cdr is a list of lists
|
|
|
381 (CONDITION-NAME BODY ...) exactly as in `condition-case'. This is
|
|
|
382 a normal `condition-case' handler.
|
|
|
383
|
|
|
384 Note that in all cases *except* the first, there is a corresponding
|
|
|
385 catch, whose TAG is the value of Vcondition_handlers just after the
|
|
|
386 handler data just described is pushed onto it. The reason is that
|
|
|
387 `condition-case' handlers need to throw back to the place where the
|
|
|
388 handler was installed before invoking it, while
|
|
|
389 `call-with-condition-handler' handlers are invoked in the
|
|
|
390 environment that `signal' was invoked in. */
|
|
|
391
|
|
|
392
|
|
428
|
393 static Lisp_Object Vcondition_handlers;
|
|
|
394
|
|
853
|
395 /* I think we should keep this enabled all the time, not just when
|
|
|
396 error checking is enabled, because if one of these puppies pops up,
|
|
|
397 it will trash the stack if not caught, making it that much harder to
|
|
|
398 debug. It doesn't cause speed loss. */
|
|
442
|
399 #define DEFEND_AGAINST_THROW_RECURSION
|
|
|
400
|
|
|
401 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
402 /* Used for error catching purposes by throw_or_bomb_out */
|
|
|
403 static int throw_level;
|
|
442
|
404 #endif
|
|
|
405
|
|
1123
|
406 static int warning_will_be_discarded (Lisp_Object level);
|
|
2532
|
407 static Lisp_Object maybe_get_trapping_problems_backtrace (void);
|
|
1123
|
408
|
|
428
|
409
|
|
|
410 /************************************************************************/
|
|
|
411 /* The subr object type */
|
|
|
412 /************************************************************************/
|
|
|
413
|
|
|
414 static void
|
|
2286
|
415 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int UNUSED (escapeflag))
|
|
428
|
416 {
|
|
|
417 Lisp_Subr *subr = XSUBR (obj);
|
|
867
|
418 const CIbyte *header =
|
|
428
|
419 (subr->max_args == UNEVALLED) ? "#<special-form " : "#<subr ";
|
|
867
|
420 const CIbyte *name = subr_name (subr);
|
|
|
421 const CIbyte *trailer = subr->prompt ? " (interactive)>" : ">";
|
|
428
|
422
|
|
|
423 if (print_readably)
|
|
563
|
424 printing_unreadable_object ("%s%s%s", header, name, trailer);
|
|
428
|
425
|
|
826
|
426 write_c_string (printcharfun, header);
|
|
|
427 write_c_string (printcharfun, name);
|
|
|
428 write_c_string (printcharfun, trailer);
|
|
428
|
429 }
|
|
|
430
|
|
1204
|
431 static const struct memory_description subr_description[] = {
|
|
2551
|
432 { XD_DOC_STRING, offsetof (Lisp_Subr, doc), 0, { 0 }, XD_FLAG_NO_KKCC },
|
|
428
|
433 { XD_END }
|
|
|
434 };
|
|
|
435
|
|
938
|
436 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("subr", subr,
|
|
|
437 1, /*dumpable-flag*/
|
|
|
438 0, print_subr, 0, 0, 0,
|
|
|
439 subr_description,
|
|
|
440 Lisp_Subr);
|
|
428
|
441
|
|
|
442 /************************************************************************/
|
|
|
443 /* Entering the debugger */
|
|
|
444 /************************************************************************/
|
|
|
445
|
|
853
|
446 static Lisp_Object
|
|
|
447 current_warning_level (void)
|
|
|
448 {
|
|
|
449 if (inhibit_flags & ISSUE_WARNINGS_AT_DEBUG_LEVEL)
|
|
|
450 return Qdebug;
|
|
|
451 else
|
|
|
452 return Qwarning;
|
|
|
453 }
|
|
|
454
|
|
428
|
455 /* Actually call the debugger. ARG is a list of args that will be
|
|
|
456 passed to the debugger function, as follows;
|
|
|
457
|
|
|
458 If due to frame exit, args are `exit' and the value being returned;
|
|
|
459 this function's value will be returned instead of that.
|
|
|
460 If due to error, args are `error' and a list of the args to `signal'.
|
|
|
461 If due to `apply' or `funcall' entry, one arg, `lambda'.
|
|
|
462 If due to `eval' entry, one arg, t.
|
|
|
463
|
|
|
464 */
|
|
|
465
|
|
|
466 static Lisp_Object
|
|
|
467 call_debugger_259 (Lisp_Object arg)
|
|
|
468 {
|
|
|
469 return apply1 (Vdebugger, arg);
|
|
|
470 }
|
|
|
471
|
|
|
472 /* Call the debugger, doing some encapsulation. We make sure we have
|
|
|
473 some room on the eval and specpdl stacks, and bind entering_debugger
|
|
|
474 to 1 during this call. This is used to trap errors that may occur
|
|
|
475 when entering the debugger (e.g. the value of `debugger' is invalid),
|
|
|
476 so that the debugger will not be recursively entered if debug-on-error
|
|
|
477 is set. (Otherwise, XEmacs would infinitely recurse, attempting to
|
|
|
478 enter the debugger.) entering_debugger gets reset to 0 as soon
|
|
|
479 as a backtrace is displayed, so that further errors can indeed be
|
|
|
480 handled normally.
|
|
|
481
|
|
3025
|
482 We also establish a catch for `debugger'. If the debugger function
|
|
428
|
483 throws to this instead of returning a value, it means that the user
|
|
|
484 pressed 'c' (pretend like the debugger was never entered). The
|
|
|
485 function then returns Qunbound. (If the user pressed 'r', for
|
|
|
486 return a value, then the debugger function returns normally with
|
|
|
487 this value.)
|
|
|
488
|
|
|
489 The difference between 'c' and 'r' is as follows:
|
|
|
490
|
|
|
491 debug-on-call:
|
|
|
492 No difference. The call proceeds as normal.
|
|
|
493 debug-on-exit:
|
|
|
494 With 'r', the specified value is returned as the function's
|
|
|
495 return value. With 'c', the value that would normally be
|
|
|
496 returned is returned.
|
|
|
497 signal:
|
|
|
498 With 'r', the specified value is returned as the return
|
|
|
499 value of `signal'. (This is the only time that `signal'
|
|
|
500 can return, instead of making a non-local exit.) With `c',
|
|
|
501 `signal' will continue looking for handlers as if the
|
|
|
502 debugger was never entered, and will probably end up
|
|
|
503 throwing to a handler or to top-level.
|
|
|
504 */
|
|
|
505
|
|
|
506 static Lisp_Object
|
|
|
507 call_debugger (Lisp_Object arg)
|
|
|
508 {
|
|
|
509 int threw;
|
|
|
510 Lisp_Object val;
|
|
|
511 int speccount;
|
|
|
512
|
|
853
|
513 debug_on_next_call = 0;
|
|
|
514
|
|
|
515 if (inhibit_flags & INHIBIT_ENTERING_DEBUGGER)
|
|
|
516 {
|
|
|
517 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE))
|
|
|
518 warn_when_safe
|
|
|
519 (Qdebugger, current_warning_level (),
|
|
|
520 "Unable to enter debugger within critical section");
|
|
|
521 return Qunbound;
|
|
|
522 }
|
|
|
523
|
|
428
|
524 if (lisp_eval_depth + 20 > max_lisp_eval_depth)
|
|
|
525 max_lisp_eval_depth = lisp_eval_depth + 20;
|
|
|
526 if (specpdl_size + 40 > max_specpdl_size)
|
|
|
527 max_specpdl_size = specpdl_size + 40;
|
|
853
|
528
|
|
|
529 speccount = internal_bind_int (&entering_debugger, 1);
|
|
2532
|
530 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw, 0, 0);
|
|
428
|
531
|
|
771
|
532 return unbind_to_1 (speccount, ((threw)
|
|
428
|
533 ? Qunbound /* Not returning a value */
|
|
|
534 : val));
|
|
|
535 }
|
|
|
536
|
|
|
537 /* Called when debug-on-exit behavior is called for. Enter the debugger
|
|
|
538 with the appropriate args for this. VAL is the exit value that is
|
|
|
539 about to be returned. */
|
|
|
540
|
|
|
541 static Lisp_Object
|
|
|
542 do_debug_on_exit (Lisp_Object val)
|
|
|
543 {
|
|
|
544 /* This is falsified by call_debugger */
|
|
|
545 Lisp_Object v = call_debugger (list2 (Qexit, val));
|
|
|
546
|
|
|
547 return !UNBOUNDP (v) ? v : val;
|
|
|
548 }
|
|
|
549
|
|
|
550 /* Called when debug-on-call behavior is called for. Enter the debugger
|
|
|
551 with the appropriate args for this. VAL is either t for a call
|
|
3025
|
552 through `eval' or `lambda' for a call through `funcall'.
|
|
428
|
553
|
|
|
554 #### The differentiation here between EVAL and FUNCALL is bogus.
|
|
|
555 FUNCALL can be defined as
|
|
|
556
|
|
|
557 (defmacro func (fun &rest args)
|
|
|
558 (cons (eval fun) args))
|
|
|
559
|
|
|
560 and should be treated as such.
|
|
|
561 */
|
|
|
562
|
|
|
563 static void
|
|
|
564 do_debug_on_call (Lisp_Object code)
|
|
|
565 {
|
|
|
566 debug_on_next_call = 0;
|
|
|
567 backtrace_list->debug_on_exit = 1;
|
|
|
568 call_debugger (list1 (code));
|
|
|
569 }
|
|
|
570
|
|
|
571 /* LIST is the value of one of the variables `debug-on-error',
|
|
|
572 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal',
|
|
|
573 and CONDITIONS is the list of error conditions associated with
|
|
|
574 the error being signalled. This returns non-nil if LIST
|
|
|
575 matches CONDITIONS. (A nil value for LIST does not match
|
|
|
576 CONDITIONS. A non-list value for LIST does match CONDITIONS.
|
|
|
577 A list matches CONDITIONS when one of the symbols in LIST is the
|
|
|
578 same as one of the symbols in CONDITIONS.) */
|
|
|
579
|
|
|
580 static int
|
|
|
581 wants_debugger (Lisp_Object list, Lisp_Object conditions)
|
|
|
582 {
|
|
|
583 if (NILP (list))
|
|
|
584 return 0;
|
|
|
585 if (! CONSP (list))
|
|
|
586 return 1;
|
|
|
587
|
|
|
588 while (CONSP (conditions))
|
|
|
589 {
|
|
2552
|
590 Lisp_Object curr, tail;
|
|
|
591 curr = XCAR (conditions);
|
|
428
|
592 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
2552
|
593 if (EQ (XCAR (tail), curr))
|
|
428
|
594 return 1;
|
|
|
595 conditions = XCDR (conditions);
|
|
|
596 }
|
|
|
597 return 0;
|
|
|
598 }
|
|
|
599
|
|
|
600
|
|
|
601 /* Return 1 if an error with condition-symbols CONDITIONS,
|
|
|
602 and described by SIGNAL-DATA, should skip the debugger
|
|
|
603 according to debugger-ignore-errors. */
|
|
|
604
|
|
|
605 static int
|
|
|
606 skip_debugger (Lisp_Object conditions, Lisp_Object data)
|
|
|
607 {
|
|
|
608 /* This function can GC */
|
|
|
609 Lisp_Object tail;
|
|
|
610 int first_string = 1;
|
|
|
611 Lisp_Object error_message = Qnil;
|
|
|
612
|
|
|
613 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail))
|
|
|
614 {
|
|
|
615 if (STRINGP (XCAR (tail)))
|
|
|
616 {
|
|
|
617 if (first_string)
|
|
|
618 {
|
|
|
619 error_message = Ferror_message_string (data);
|
|
|
620 first_string = 0;
|
|
|
621 }
|
|
|
622 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0)
|
|
|
623 return 1;
|
|
|
624 }
|
|
|
625 else
|
|
|
626 {
|
|
|
627 Lisp_Object contail;
|
|
|
628
|
|
|
629 for (contail = conditions; CONSP (contail); contail = XCDR (contail))
|
|
|
630 if (EQ (XCAR (tail), XCAR (contail)))
|
|
|
631 return 1;
|
|
|
632 }
|
|
|
633 }
|
|
|
634
|
|
|
635 return 0;
|
|
|
636 }
|
|
|
637
|
|
|
638 /* Actually generate a backtrace on STREAM. */
|
|
|
639
|
|
|
640 static Lisp_Object
|
|
|
641 backtrace_259 (Lisp_Object stream)
|
|
|
642 {
|
|
|
643 return Fbacktrace (stream, Qt);
|
|
|
644 }
|
|
|
645
|
|
1130
|
646 #ifdef DEBUG_XEMACS
|
|
|
647
|
|
|
648 static void
|
|
|
649 trace_out_and_die (Lisp_Object err)
|
|
|
650 {
|
|
|
651 Fdisplay_error (err, Qt);
|
|
|
652 backtrace_259 (Qnil);
|
|
|
653 stderr_out ("XEmacs exiting to debugger.\n");
|
|
|
654 Fforce_debugging_signal (Qt);
|
|
|
655 /* Unlikely to be reached */
|
|
|
656 }
|
|
|
657
|
|
|
658 #endif
|
|
|
659
|
|
428
|
660 /* An error was signaled. Maybe call the debugger, if the `debug-on-error'
|
|
|
661 etc. variables call for this. CONDITIONS is the list of conditions
|
|
|
662 associated with the error being signalled. SIG is the actual error
|
|
|
663 being signalled, and DATA is the associated data (these are exactly
|
|
|
664 the same as the arguments to `signal'). ACTIVE_HANDLERS is the
|
|
|
665 list of error handlers that are to be put in place while the debugger
|
|
|
666 is called. This is generally the remaining handlers that are
|
|
|
667 outside of the innermost handler trapping this error. This way,
|
|
|
668 if the same error occurs inside of the debugger, you usually don't get
|
|
|
669 the debugger entered recursively.
|
|
|
670
|
|
|
671 This function returns Qunbound if it didn't call the debugger or if
|
|
|
672 the user asked (through 'c') that XEmacs should pretend like the
|
|
|
673 debugger was never entered. Otherwise, it returns the value
|
|
|
674 that the user specified with `r'. (Note that much of the time,
|
|
|
675 the user will abort with C-], and we will never have a chance to
|
|
|
676 return anything at all.)
|
|
|
677
|
|
|
678 SIGNAL_VARS_ONLY means we should only look at debug-on-signal
|
|
|
679 and stack-trace-on-signal to control whether we do anything.
|
|
|
680 This is so that debug-on-error doesn't make handled errors
|
|
|
681 cause the debugger to get invoked.
|
|
|
682
|
|
|
683 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that
|
|
|
684 those functions aren't done more than once in a single `signal'
|
|
|
685 session. */
|
|
|
686
|
|
|
687 static Lisp_Object
|
|
|
688 signal_call_debugger (Lisp_Object conditions,
|
|
|
689 Lisp_Object sig, Lisp_Object data,
|
|
|
690 Lisp_Object active_handlers,
|
|
|
691 int signal_vars_only,
|
|
|
692 int *stack_trace_displayed,
|
|
|
693 int *debugger_entered)
|
|
|
694 {
|
|
853
|
695 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE
|
|
428
|
696 /* This function can GC */
|
|
853
|
697 #else /* reality check */
|
|
|
698 /* This function cannot GC because it inhibits GC during its operation */
|
|
|
699 #endif
|
|
|
700
|
|
428
|
701 Lisp_Object val = Qunbound;
|
|
|
702 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
703 Lisp_Object temp_data = Qnil;
|
|
853
|
704 int outer_speccount = specpdl_depth();
|
|
|
705 int speccount;
|
|
|
706
|
|
|
707 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE
|
|
428
|
708 struct gcpro gcpro1, gcpro2;
|
|
|
709 GCPRO2 (all_handlers, temp_data);
|
|
853
|
710 #else
|
|
|
711 begin_gc_forbidden ();
|
|
|
712 #endif
|
|
|
713
|
|
|
714 speccount = specpdl_depth();
|
|
428
|
715
|
|
|
716 Vcondition_handlers = active_handlers;
|
|
|
717
|
|
|
718 temp_data = Fcons (sig, data); /* needed for skip_debugger */
|
|
|
719
|
|
|
720 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only
|
|
|
721 && wants_debugger (Vstack_trace_on_error, conditions)
|
|
|
722 && !skip_debugger (conditions, temp_data))
|
|
|
723 {
|
|
|
724 specbind (Qdebug_on_error, Qnil);
|
|
|
725 specbind (Qstack_trace_on_error, Qnil);
|
|
|
726 specbind (Qdebug_on_signal, Qnil);
|
|
|
727 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
728
|
|
442
|
729 if (!noninteractive)
|
|
|
730 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
|
731 backtrace_259,
|
|
|
732 Qnil,
|
|
|
733 Qnil);
|
|
|
734 else /* in batch mode, we want this going to stderr. */
|
|
|
735 backtrace_259 (Qnil);
|
|
771
|
736 unbind_to (speccount);
|
|
428
|
737 *stack_trace_displayed = 1;
|
|
|
738 }
|
|
|
739
|
|
|
740 if (!entering_debugger && !*debugger_entered && !signal_vars_only
|
|
|
741 && (EQ (sig, Qquit)
|
|
|
742 ? debug_on_quit
|
|
|
743 : wants_debugger (Vdebug_on_error, conditions))
|
|
|
744 && !skip_debugger (conditions, temp_data))
|
|
|
745 {
|
|
|
746 debug_on_quit &= ~2; /* reset critical bit */
|
|
1123
|
747
|
|
428
|
748 specbind (Qdebug_on_error, Qnil);
|
|
|
749 specbind (Qstack_trace_on_error, Qnil);
|
|
|
750 specbind (Qdebug_on_signal, Qnil);
|
|
|
751 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
752
|
|
1130
|
753 #ifdef DEBUG_XEMACS
|
|
|
754 if (noninteractive)
|
|
|
755 trace_out_and_die (Fcons (sig, data));
|
|
|
756 #endif
|
|
|
757
|
|
428
|
758 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
853
|
759 unbind_to (speccount);
|
|
428
|
760 *debugger_entered = 1;
|
|
|
761 }
|
|
|
762
|
|
|
763 if (!entering_debugger && !*stack_trace_displayed
|
|
|
764 && wants_debugger (Vstack_trace_on_signal, conditions))
|
|
|
765 {
|
|
|
766 specbind (Qdebug_on_error, Qnil);
|
|
|
767 specbind (Qstack_trace_on_error, Qnil);
|
|
|
768 specbind (Qdebug_on_signal, Qnil);
|
|
|
769 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
770
|
|
442
|
771 if (!noninteractive)
|
|
|
772 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
|
773 backtrace_259,
|
|
|
774 Qnil,
|
|
|
775 Qnil);
|
|
|
776 else /* in batch mode, we want this going to stderr. */
|
|
|
777 backtrace_259 (Qnil);
|
|
771
|
778 unbind_to (speccount);
|
|
428
|
779 *stack_trace_displayed = 1;
|
|
|
780 }
|
|
|
781
|
|
|
782 if (!entering_debugger && !*debugger_entered
|
|
|
783 && (EQ (sig, Qquit)
|
|
|
784 ? debug_on_quit
|
|
|
785 : wants_debugger (Vdebug_on_signal, conditions)))
|
|
|
786 {
|
|
|
787 debug_on_quit &= ~2; /* reset critical bit */
|
|
1123
|
788
|
|
428
|
789 specbind (Qdebug_on_error, Qnil);
|
|
|
790 specbind (Qstack_trace_on_error, Qnil);
|
|
|
791 specbind (Qdebug_on_signal, Qnil);
|
|
|
792 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
793
|
|
1130
|
794 #ifdef DEBUG_XEMACS
|
|
|
795 if (noninteractive)
|
|
|
796 trace_out_and_die (Fcons (sig, data));
|
|
|
797 #endif
|
|
|
798
|
|
428
|
799 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
800 *debugger_entered = 1;
|
|
|
801 }
|
|
|
802
|
|
853
|
803 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE
|
|
428
|
804 UNGCPRO;
|
|
853
|
805 #endif
|
|
428
|
806 Vcondition_handlers = all_handlers;
|
|
853
|
807 return unbind_to_1 (outer_speccount, val);
|
|
428
|
808 }
|
|
|
809
|
|
|
810
|
|
|
811 /************************************************************************/
|
|
|
812 /* The basic special forms */
|
|
|
813 /************************************************************************/
|
|
|
814
|
|
|
815 /* Except for Fprogn(), the basic special forms below are only called
|
|
|
816 from interpreted code. The byte compiler turns them into bytecodes. */
|
|
|
817
|
|
|
818 DEFUN ("or", For, 0, UNEVALLED, 0, /*
|
|
|
819 Eval args until one of them yields non-nil, then return that value.
|
|
|
820 The remaining args are not evalled at all.
|
|
|
821 If all args return nil, return nil.
|
|
|
822 */
|
|
|
823 (args))
|
|
|
824 {
|
|
|
825 /* This function can GC */
|
|
442
|
826 REGISTER Lisp_Object val;
|
|
428
|
827
|
|
|
828 LIST_LOOP_2 (arg, args)
|
|
|
829 {
|
|
|
830 if (!NILP (val = Feval (arg)))
|
|
|
831 return val;
|
|
|
832 }
|
|
|
833
|
|
|
834 return Qnil;
|
|
|
835 }
|
|
|
836
|
|
|
837 DEFUN ("and", Fand, 0, UNEVALLED, 0, /*
|
|
|
838 Eval args until one of them yields nil, then return nil.
|
|
|
839 The remaining args are not evalled at all.
|
|
|
840 If no arg yields nil, return the last arg's value.
|
|
|
841 */
|
|
|
842 (args))
|
|
|
843 {
|
|
|
844 /* This function can GC */
|
|
442
|
845 REGISTER Lisp_Object val = Qt;
|
|
428
|
846
|
|
|
847 LIST_LOOP_2 (arg, args)
|
|
|
848 {
|
|
|
849 if (NILP (val = Feval (arg)))
|
|
|
850 return val;
|
|
|
851 }
|
|
|
852
|
|
|
853 return val;
|
|
|
854 }
|
|
|
855
|
|
|
856 DEFUN ("if", Fif, 2, UNEVALLED, 0, /*
|
|
|
857 \(if COND THEN ELSE...): if COND yields non-nil, do THEN, else do ELSE...
|
|
|
858 Returns the value of THEN or the value of the last of the ELSE's.
|
|
|
859 THEN must be one expression, but ELSE... can be zero or more expressions.
|
|
|
860 If COND yields nil, and there are no ELSE's, the value is nil.
|
|
|
861 */
|
|
|
862 (args))
|
|
|
863 {
|
|
|
864 /* This function can GC */
|
|
|
865 Lisp_Object condition = XCAR (args);
|
|
|
866 Lisp_Object then_form = XCAR (XCDR (args));
|
|
|
867 Lisp_Object else_forms = XCDR (XCDR (args));
|
|
|
868
|
|
|
869 if (!NILP (Feval (condition)))
|
|
|
870 return Feval (then_form);
|
|
|
871 else
|
|
|
872 return Fprogn (else_forms);
|
|
|
873 }
|
|
|
874
|
|
|
875 /* Macros `when' and `unless' are trivially defined in Lisp,
|
|
|
876 but it helps for bootstrapping to have them ALWAYS defined. */
|
|
|
877
|
|
|
878 DEFUN ("when", Fwhen, 1, MANY, 0, /*
|
|
|
879 \(when COND BODY...): if COND yields non-nil, do BODY, else return nil.
|
|
|
880 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
881 */
|
|
|
882 (int nargs, Lisp_Object *args))
|
|
|
883 {
|
|
|
884 Lisp_Object cond = args[0];
|
|
|
885 Lisp_Object body;
|
|
853
|
886
|
|
428
|
887 switch (nargs)
|
|
|
888 {
|
|
|
889 case 1: body = Qnil; break;
|
|
|
890 case 2: body = args[1]; break;
|
|
|
891 default: body = Fcons (Qprogn, Flist (nargs-1, args+1)); break;
|
|
|
892 }
|
|
|
893
|
|
|
894 return list3 (Qif, cond, body);
|
|
|
895 }
|
|
|
896
|
|
|
897 DEFUN ("unless", Funless, 1, MANY, 0, /*
|
|
|
898 \(unless COND BODY...): if COND yields nil, do BODY, else return nil.
|
|
|
899 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
900 */
|
|
|
901 (int nargs, Lisp_Object *args))
|
|
|
902 {
|
|
|
903 Lisp_Object cond = args[0];
|
|
|
904 Lisp_Object body = Flist (nargs-1, args+1);
|
|
|
905 return Fcons (Qif, Fcons (cond, Fcons (Qnil, body)));
|
|
|
906 }
|
|
|
907
|
|
|
908 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /*
|
|
444
|
909 \(cond CLAUSES...): try each clause until one succeeds.
|
|
428
|
910 Each clause looks like (CONDITION BODY...). CONDITION is evaluated
|
|
|
911 and, if the value is non-nil, this clause succeeds:
|
|
|
912 then the expressions in BODY are evaluated and the last one's
|
|
|
913 value is the value of the cond-form.
|
|
|
914 If no clause succeeds, cond returns nil.
|
|
|
915 If a clause has one element, as in (CONDITION),
|
|
|
916 CONDITION's value if non-nil is returned from the cond-form.
|
|
|
917 */
|
|
|
918 (args))
|
|
|
919 {
|
|
|
920 /* This function can GC */
|
|
442
|
921 REGISTER Lisp_Object val;
|
|
428
|
922
|
|
|
923 LIST_LOOP_2 (clause, args)
|
|
|
924 {
|
|
|
925 CHECK_CONS (clause);
|
|
|
926 if (!NILP (val = Feval (XCAR (clause))))
|
|
|
927 {
|
|
|
928 if (!NILP (clause = XCDR (clause)))
|
|
|
929 {
|
|
|
930 CHECK_TRUE_LIST (clause);
|
|
|
931 val = Fprogn (clause);
|
|
|
932 }
|
|
|
933 return val;
|
|
|
934 }
|
|
|
935 }
|
|
|
936
|
|
|
937 return Qnil;
|
|
|
938 }
|
|
|
939
|
|
|
940 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /*
|
|
|
941 \(progn BODY...): eval BODY forms sequentially and return value of last one.
|
|
|
942 */
|
|
|
943 (args))
|
|
|
944 {
|
|
|
945 /* This function can GC */
|
|
|
946 /* Caller must provide a true list in ARGS */
|
|
442
|
947 REGISTER Lisp_Object val = Qnil;
|
|
428
|
948 struct gcpro gcpro1;
|
|
|
949
|
|
|
950 GCPRO1 (args);
|
|
|
951
|
|
|
952 {
|
|
|
953 LIST_LOOP_2 (form, args)
|
|
|
954 val = Feval (form);
|
|
|
955 }
|
|
|
956
|
|
|
957 UNGCPRO;
|
|
|
958 return val;
|
|
|
959 }
|
|
|
960
|
|
|
961 /* Fprog1() is the canonical example of a function that must GCPRO a
|
|
|
962 Lisp_Object across calls to Feval(). */
|
|
|
963
|
|
|
964 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /*
|
|
|
965 Similar to `progn', but the value of the first form is returned.
|
|
|
966 \(prog1 FIRST BODY...): All the arguments are evaluated sequentially.
|
|
|
967 The value of FIRST is saved during evaluation of the remaining args,
|
|
|
968 whose values are discarded.
|
|
|
969 */
|
|
|
970 (args))
|
|
|
971 {
|
|
|
972 /* This function can GC */
|
|
1849
|
973 Lisp_Object val;
|
|
428
|
974 struct gcpro gcpro1;
|
|
|
975
|
|
|
976 val = Feval (XCAR (args));
|
|
|
977
|
|
|
978 GCPRO1 (val);
|
|
|
979
|
|
|
980 {
|
|
|
981 LIST_LOOP_2 (form, XCDR (args))
|
|
|
982 Feval (form);
|
|
|
983 }
|
|
|
984
|
|
|
985 UNGCPRO;
|
|
|
986 return val;
|
|
|
987 }
|
|
|
988
|
|
|
989 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /*
|
|
|
990 Similar to `progn', but the value of the second form is returned.
|
|
|
991 \(prog2 FIRST SECOND BODY...): All the arguments are evaluated sequentially.
|
|
|
992 The value of SECOND is saved during evaluation of the remaining args,
|
|
|
993 whose values are discarded.
|
|
|
994 */
|
|
|
995 (args))
|
|
|
996 {
|
|
|
997 /* This function can GC */
|
|
1849
|
998 Lisp_Object val;
|
|
428
|
999 struct gcpro gcpro1;
|
|
|
1000
|
|
|
1001 Feval (XCAR (args));
|
|
|
1002 args = XCDR (args);
|
|
|
1003 val = Feval (XCAR (args));
|
|
|
1004 args = XCDR (args);
|
|
|
1005
|
|
|
1006 GCPRO1 (val);
|
|
|
1007
|
|
442
|
1008 {
|
|
|
1009 LIST_LOOP_2 (form, args)
|
|
|
1010 Feval (form);
|
|
|
1011 }
|
|
428
|
1012
|
|
|
1013 UNGCPRO;
|
|
|
1014 return val;
|
|
|
1015 }
|
|
|
1016
|
|
|
1017 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /*
|
|
|
1018 \(let* VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
|
1019 The value of the last form in BODY is returned.
|
|
|
1020 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
1021 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
1022 Each VALUEFORM can refer to the symbols already bound by this VARLIST.
|
|
|
1023 */
|
|
|
1024 (args))
|
|
|
1025 {
|
|
|
1026 /* This function can GC */
|
|
|
1027 Lisp_Object varlist = XCAR (args);
|
|
|
1028 Lisp_Object body = XCDR (args);
|
|
|
1029 int speccount = specpdl_depth();
|
|
|
1030
|
|
|
1031 EXTERNAL_LIST_LOOP_3 (var, varlist, tail)
|
|
|
1032 {
|
|
|
1033 Lisp_Object symbol, value, tem;
|
|
|
1034 if (SYMBOLP (var))
|
|
|
1035 symbol = var, value = Qnil;
|
|
|
1036 else
|
|
|
1037 {
|
|
|
1038 CHECK_CONS (var);
|
|
|
1039 symbol = XCAR (var);
|
|
|
1040 tem = XCDR (var);
|
|
|
1041 if (NILP (tem))
|
|
|
1042 value = Qnil;
|
|
|
1043 else
|
|
|
1044 {
|
|
|
1045 CHECK_CONS (tem);
|
|
|
1046 value = Feval (XCAR (tem));
|
|
|
1047 if (!NILP (XCDR (tem)))
|
|
563
|
1048 sferror
|
|
428
|
1049 ("`let' bindings can have only one value-form", var);
|
|
|
1050 }
|
|
|
1051 }
|
|
|
1052 specbind (symbol, value);
|
|
|
1053 }
|
|
771
|
1054 return unbind_to_1 (speccount, Fprogn (body));
|
|
428
|
1055 }
|
|
|
1056
|
|
|
1057 DEFUN ("let", Flet, 1, UNEVALLED, 0, /*
|
|
|
1058 \(let VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
|
1059 The value of the last form in BODY is returned.
|
|
|
1060 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
1061 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
1062 All the VALUEFORMs are evalled before any symbols are bound.
|
|
|
1063 */
|
|
|
1064 (args))
|
|
|
1065 {
|
|
|
1066 /* This function can GC */
|
|
|
1067 Lisp_Object varlist = XCAR (args);
|
|
|
1068 Lisp_Object body = XCDR (args);
|
|
|
1069 int speccount = specpdl_depth();
|
|
|
1070 Lisp_Object *temps;
|
|
|
1071 int idx;
|
|
|
1072 struct gcpro gcpro1;
|
|
|
1073
|
|
|
1074 /* Make space to hold the values to give the bound variables. */
|
|
|
1075 {
|
|
|
1076 int varcount;
|
|
|
1077 GET_EXTERNAL_LIST_LENGTH (varlist, varcount);
|
|
|
1078 temps = alloca_array (Lisp_Object, varcount);
|
|
|
1079 }
|
|
|
1080
|
|
|
1081 /* Compute the values and store them in `temps' */
|
|
|
1082 GCPRO1 (*temps);
|
|
|
1083 gcpro1.nvars = 0;
|
|
|
1084
|
|
|
1085 idx = 0;
|
|
442
|
1086 {
|
|
|
1087 LIST_LOOP_2 (var, varlist)
|
|
|
1088 {
|
|
|
1089 Lisp_Object *value = &temps[idx++];
|
|
|
1090 if (SYMBOLP (var))
|
|
|
1091 *value = Qnil;
|
|
|
1092 else
|
|
|
1093 {
|
|
|
1094 Lisp_Object tem;
|
|
|
1095 CHECK_CONS (var);
|
|
|
1096 tem = XCDR (var);
|
|
|
1097 if (NILP (tem))
|
|
|
1098 *value = Qnil;
|
|
|
1099 else
|
|
|
1100 {
|
|
|
1101 CHECK_CONS (tem);
|
|
|
1102 *value = Feval (XCAR (tem));
|
|
|
1103 gcpro1.nvars = idx;
|
|
|
1104
|
|
|
1105 if (!NILP (XCDR (tem)))
|
|
563
|
1106 sferror
|
|
442
|
1107 ("`let' bindings can have only one value-form", var);
|
|
|
1108 }
|
|
|
1109 }
|
|
|
1110 }
|
|
|
1111 }
|
|
428
|
1112
|
|
|
1113 idx = 0;
|
|
442
|
1114 {
|
|
|
1115 LIST_LOOP_2 (var, varlist)
|
|
|
1116 {
|
|
|
1117 specbind (SYMBOLP (var) ? var : XCAR (var), temps[idx++]);
|
|
|
1118 }
|
|
|
1119 }
|
|
428
|
1120
|
|
|
1121 UNGCPRO;
|
|
|
1122
|
|
771
|
1123 return unbind_to_1 (speccount, Fprogn (body));
|
|
428
|
1124 }
|
|
|
1125
|
|
|
1126 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /*
|
|
|
1127 \(while TEST BODY...): if TEST yields non-nil, eval BODY... and repeat.
|
|
|
1128 The order of execution is thus TEST, BODY, TEST, BODY and so on
|
|
|
1129 until TEST returns nil.
|
|
|
1130 */
|
|
|
1131 (args))
|
|
|
1132 {
|
|
|
1133 /* This function can GC */
|
|
|
1134 Lisp_Object test = XCAR (args);
|
|
|
1135 Lisp_Object body = XCDR (args);
|
|
|
1136
|
|
|
1137 while (!NILP (Feval (test)))
|
|
|
1138 {
|
|
|
1139 QUIT;
|
|
|
1140 Fprogn (body);
|
|
|
1141 }
|
|
|
1142
|
|
|
1143 return Qnil;
|
|
|
1144 }
|
|
|
1145
|
|
|
1146 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /*
|
|
|
1147 \(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL.
|
|
|
1148 The symbols SYM are variables; they are literal (not evaluated).
|
|
|
1149 The values VAL are expressions; they are evaluated.
|
|
|
1150 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.
|
|
|
1151 The second VAL is not computed until after the first SYM is set, and so on;
|
|
|
1152 each VAL can use the new value of variables set earlier in the `setq'.
|
|
|
1153 The return value of the `setq' form is the value of the last VAL.
|
|
|
1154 */
|
|
|
1155 (args))
|
|
|
1156 {
|
|
|
1157 /* This function can GC */
|
|
|
1158 int nargs;
|
|
2421
|
1159 Lisp_Object retval = Qnil;
|
|
428
|
1160
|
|
|
1161 GET_LIST_LENGTH (args, nargs);
|
|
|
1162
|
|
|
1163 if (nargs & 1) /* Odd number of arguments? */
|
|
|
1164 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, make_int (nargs)));
|
|
|
1165
|
|
2421
|
1166 GC_PROPERTY_LIST_LOOP_3 (symbol, val, args)
|
|
428
|
1167 {
|
|
|
1168 val = Feval (val);
|
|
|
1169 Fset (symbol, val);
|
|
2421
|
1170 retval = val;
|
|
428
|
1171 }
|
|
|
1172
|
|
2421
|
1173 END_GC_PROPERTY_LIST_LOOP (symbol);
|
|
|
1174
|
|
|
1175 return retval;
|
|
428
|
1176 }
|
|
|
1177
|
|
|
1178 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /*
|
|
|
1179 Return the argument, without evaluating it. `(quote x)' yields `x'.
|
|
3794
|
1180
|
|
|
1181 There is an alternative and more used reader syntax for `quote'. Precede
|
|
|
1182 any Lisp object with a single apostrophe, and that Lisp object will be
|
|
|
1183 returned unevaluated. 'x is thus equivalent to (quote x).
|
|
|
1184
|
|
|
1185 Do not use `quote' or the single apostrophe for lambda expressions that you
|
|
|
1186 would prefer to be byte-compiled. Use `function', which see, or take
|
|
|
1187 advantage of the fact that lambda expressions are self-quoting and such
|
|
|
1188 lambda expressions will be automatically byte-compiled.
|
|
428
|
1189 */
|
|
|
1190 (args))
|
|
|
1191 {
|
|
|
1192 return XCAR (args);
|
|
|
1193 }
|
|
|
1194
|
|
|
1195 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /*
|
|
|
1196 Like `quote', but preferred for objects which are functions.
|
|
3794
|
1197
|
|
|
1198 As with `quote' there is an alternative reader syntax for `function' which
|
|
|
1199 in practice is used more often. Writing #'OBJECT is equivalent to writing
|
|
|
1200 \(function OBJECT), where OBJECT is some Lisp object.
|
|
|
1201
|
|
|
1202 In byte compilation, `function' causes a lambda expression argument to be
|
|
|
1203 compiled. `quote' cannot do that. lambda expressions are, however,
|
|
|
1204 self-quoting, and self-quoted lambda expressions will be byte-compiled.
|
|
|
1205 Only lambda expressions explicitly quoted with `quote' or that occur in
|
|
|
1206 nested data lists will not be byte-compiled.
|
|
428
|
1207 */
|
|
|
1208 (args))
|
|
|
1209 {
|
|
|
1210 return XCAR (args);
|
|
|
1211 }
|
|
|
1212
|
|
|
1213
|
|
|
1214 /************************************************************************/
|
|
|
1215 /* Defining functions/variables */
|
|
|
1216 /************************************************************************/
|
|
|
1217 static Lisp_Object
|
|
|
1218 define_function (Lisp_Object name, Lisp_Object defn)
|
|
|
1219 {
|
|
|
1220 Ffset (name, defn);
|
|
|
1221 LOADHIST_ATTACH (name);
|
|
|
1222 return name;
|
|
|
1223 }
|
|
|
1224
|
|
|
1225 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /*
|
|
|
1226 \(defun NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.
|
|
|
1227 The definition is (lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1228 See also the function `interactive'.
|
|
|
1229 */
|
|
|
1230 (args))
|
|
|
1231 {
|
|
|
1232 /* This function can GC */
|
|
|
1233 return define_function (XCAR (args),
|
|
|
1234 Fcons (Qlambda, XCDR (args)));
|
|
|
1235 }
|
|
|
1236
|
|
|
1237 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /*
|
|
|
1238 \(defmacro NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro.
|
|
|
1239 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1240 When the macro is called, as in (NAME ARGS...),
|
|
|
1241 the function (lambda ARGLIST BODY...) is applied to
|
|
|
1242 the list ARGS... as it appears in the expression,
|
|
|
1243 and the result should be a form to be evaluated instead of the original.
|
|
|
1244 */
|
|
|
1245 (args))
|
|
|
1246 {
|
|
|
1247 /* This function can GC */
|
|
|
1248 return define_function (XCAR (args),
|
|
|
1249 Fcons (Qmacro, Fcons (Qlambda, XCDR (args))));
|
|
|
1250 }
|
|
|
1251
|
|
|
1252 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /*
|
|
|
1253 \(defvar SYMBOL INITVALUE DOCSTRING): define SYMBOL as a variable.
|
|
|
1254 You are not required to define a variable in order to use it,
|
|
|
1255 but the definition can supply documentation and an initial value
|
|
|
1256 in a way that tags can recognize.
|
|
|
1257
|
|
|
1258 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is
|
|
|
1259 void. (However, when you evaluate a defvar interactively, it acts like a
|
|
|
1260 defconst: SYMBOL's value is always set regardless of whether it's currently
|
|
|
1261 void.)
|
|
|
1262 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1263 buffer-local values are not affected.
|
|
|
1264 INITVALUE and DOCSTRING are optional.
|
|
|
1265 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
442
|
1266 This means that M-x set-variable recognizes it.
|
|
428
|
1267 If INITVALUE is missing, SYMBOL's value is not set.
|
|
|
1268
|
|
|
1269 In lisp-interaction-mode defvar is treated as defconst.
|
|
|
1270 */
|
|
|
1271 (args))
|
|
|
1272 {
|
|
|
1273 /* This function can GC */
|
|
|
1274 Lisp_Object sym = XCAR (args);
|
|
|
1275
|
|
|
1276 if (!NILP (args = XCDR (args)))
|
|
|
1277 {
|
|
|
1278 Lisp_Object val = XCAR (args);
|
|
|
1279
|
|
|
1280 if (NILP (Fdefault_boundp (sym)))
|
|
|
1281 {
|
|
|
1282 struct gcpro gcpro1;
|
|
|
1283 GCPRO1 (val);
|
|
|
1284 val = Feval (val);
|
|
|
1285 Fset_default (sym, val);
|
|
|
1286 UNGCPRO;
|
|
|
1287 }
|
|
|
1288
|
|
|
1289 if (!NILP (args = XCDR (args)))
|
|
|
1290 {
|
|
|
1291 Lisp_Object doc = XCAR (args);
|
|
|
1292 Fput (sym, Qvariable_documentation, doc);
|
|
|
1293 if (!NILP (args = XCDR (args)))
|
|
563
|
1294 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound);
|
|
428
|
1295 }
|
|
|
1296 }
|
|
|
1297
|
|
|
1298 #ifdef I18N3
|
|
|
1299 if (!NILP (Vfile_domain))
|
|
|
1300 Fput (sym, Qvariable_domain, Vfile_domain);
|
|
|
1301 #endif
|
|
|
1302
|
|
|
1303 LOADHIST_ATTACH (sym);
|
|
|
1304 return sym;
|
|
|
1305 }
|
|
|
1306
|
|
|
1307 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /*
|
|
|
1308 \(defconst SYMBOL INITVALUE DOCSTRING): define SYMBOL as a constant
|
|
|
1309 variable.
|
|
|
1310 The intent is that programs do not change this value, but users may.
|
|
|
1311 Always sets the value of SYMBOL to the result of evalling INITVALUE.
|
|
|
1312 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1313 buffer-local values are not affected.
|
|
|
1314 DOCSTRING is optional.
|
|
|
1315 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
442
|
1316 This means that M-x set-variable recognizes it.
|
|
428
|
1317
|
|
|
1318 Note: do not use `defconst' for user options in libraries that are not
|
|
|
1319 normally loaded, since it is useful for users to be able to specify
|
|
|
1320 their own values for such variables before loading the library.
|
|
|
1321 Since `defconst' unconditionally assigns the variable,
|
|
|
1322 it would override the user's choice.
|
|
|
1323 */
|
|
|
1324 (args))
|
|
|
1325 {
|
|
|
1326 /* This function can GC */
|
|
|
1327 Lisp_Object sym = XCAR (args);
|
|
|
1328 Lisp_Object val = Feval (XCAR (args = XCDR (args)));
|
|
|
1329 struct gcpro gcpro1;
|
|
|
1330
|
|
|
1331 GCPRO1 (val);
|
|
|
1332
|
|
|
1333 Fset_default (sym, val);
|
|
|
1334
|
|
|
1335 UNGCPRO;
|
|
|
1336
|
|
|
1337 if (!NILP (args = XCDR (args)))
|
|
|
1338 {
|
|
|
1339 Lisp_Object doc = XCAR (args);
|
|
|
1340 Fput (sym, Qvariable_documentation, doc);
|
|
|
1341 if (!NILP (args = XCDR (args)))
|
|
563
|
1342 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound);
|
|
428
|
1343 }
|
|
|
1344
|
|
|
1345 #ifdef I18N3
|
|
|
1346 if (!NILP (Vfile_domain))
|
|
|
1347 Fput (sym, Qvariable_domain, Vfile_domain);
|
|
|
1348 #endif
|
|
|
1349
|
|
|
1350 LOADHIST_ATTACH (sym);
|
|
|
1351 return sym;
|
|
|
1352 }
|
|
|
1353
|
|
|
1354 DEFUN ("user-variable-p", Fuser_variable_p, 1, 1, 0, /*
|
|
|
1355 Return t if VARIABLE is intended to be set and modified by users.
|
|
|
1356 \(The alternative is a variable used internally in a Lisp program.)
|
|
|
1357 Determined by whether the first character of the documentation
|
|
|
1358 for the variable is `*'.
|
|
|
1359 */
|
|
|
1360 (variable))
|
|
|
1361 {
|
|
|
1362 Lisp_Object documentation = Fget (variable, Qvariable_documentation, Qnil);
|
|
|
1363
|
|
|
1364 return
|
|
|
1365 ((INTP (documentation) && XINT (documentation) < 0) ||
|
|
|
1366
|
|
|
1367 (STRINGP (documentation) &&
|
|
826
|
1368 (string_byte (documentation, 0) == '*')) ||
|
|
428
|
1369
|
|
|
1370 /* If (STRING . INTEGER), a negative integer means a user variable. */
|
|
|
1371 (CONSP (documentation)
|
|
|
1372 && STRINGP (XCAR (documentation))
|
|
|
1373 && INTP (XCDR (documentation))
|
|
|
1374 && XINT (XCDR (documentation)) < 0)) ?
|
|
|
1375 Qt : Qnil;
|
|
|
1376 }
|
|
|
1377
|
|
|
1378 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /*
|
|
|
1379 Return result of expanding macros at top level of FORM.
|
|
|
1380 If FORM is not a macro call, it is returned unchanged.
|
|
|
1381 Otherwise, the macro is expanded and the expansion is considered
|
|
|
1382 in place of FORM. When a non-macro-call results, it is returned.
|
|
|
1383
|
|
442
|
1384 The second optional arg ENVIRONMENT specifies an environment of macro
|
|
428
|
1385 definitions to shadow the loaded ones for use in file byte-compilation.
|
|
|
1386 */
|
|
442
|
1387 (form, environment))
|
|
428
|
1388 {
|
|
|
1389 /* This function can GC */
|
|
|
1390 /* With cleanups from Hallvard Furuseth. */
|
|
|
1391 REGISTER Lisp_Object expander, sym, def, tem;
|
|
|
1392
|
|
|
1393 while (1)
|
|
|
1394 {
|
|
|
1395 /* Come back here each time we expand a macro call,
|
|
|
1396 in case it expands into another macro call. */
|
|
|
1397 if (!CONSP (form))
|
|
|
1398 break;
|
|
|
1399 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */
|
|
|
1400 def = sym = XCAR (form);
|
|
|
1401 tem = Qnil;
|
|
|
1402 /* Trace symbols aliases to other symbols
|
|
|
1403 until we get a symbol that is not an alias. */
|
|
|
1404 while (SYMBOLP (def))
|
|
|
1405 {
|
|
|
1406 QUIT;
|
|
|
1407 sym = def;
|
|
442
|
1408 tem = Fassq (sym, environment);
|
|
428
|
1409 if (NILP (tem))
|
|
|
1410 {
|
|
|
1411 def = XSYMBOL (sym)->function;
|
|
|
1412 if (!UNBOUNDP (def))
|
|
|
1413 continue;
|
|
|
1414 }
|
|
|
1415 break;
|
|
|
1416 }
|
|
442
|
1417 /* Right now TEM is the result from SYM in ENVIRONMENT,
|
|
428
|
1418 and if TEM is nil then DEF is SYM's function definition. */
|
|
|
1419 if (NILP (tem))
|
|
|
1420 {
|
|
442
|
1421 /* SYM is not mentioned in ENVIRONMENT.
|
|
428
|
1422 Look at its function definition. */
|
|
|
1423 if (UNBOUNDP (def)
|
|
|
1424 || !CONSP (def))
|
|
|
1425 /* Not defined or definition not suitable */
|
|
|
1426 break;
|
|
|
1427 if (EQ (XCAR (def), Qautoload))
|
|
|
1428 {
|
|
|
1429 /* Autoloading function: will it be a macro when loaded? */
|
|
|
1430 tem = Felt (def, make_int (4));
|
|
|
1431 if (EQ (tem, Qt) || EQ (tem, Qmacro))
|
|
|
1432 {
|
|
|
1433 /* Yes, load it and try again. */
|
|
970
|
1434 /* do_autoload GCPROs both arguments */
|
|
428
|
1435 do_autoload (def, sym);
|
|
|
1436 continue;
|
|
|
1437 }
|
|
|
1438 else
|
|
|
1439 break;
|
|
|
1440 }
|
|
|
1441 else if (!EQ (XCAR (def), Qmacro))
|
|
|
1442 break;
|
|
|
1443 else expander = XCDR (def);
|
|
|
1444 }
|
|
|
1445 else
|
|
|
1446 {
|
|
|
1447 expander = XCDR (tem);
|
|
|
1448 if (NILP (expander))
|
|
|
1449 break;
|
|
|
1450 }
|
|
|
1451 form = apply1 (expander, XCDR (form));
|
|
|
1452 }
|
|
|
1453 return form;
|
|
|
1454 }
|
|
|
1455
|
|
|
1456
|
|
|
1457 /************************************************************************/
|
|
|
1458 /* Non-local exits */
|
|
|
1459 /************************************************************************/
|
|
|
1460
|
|
1318
|
1461 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS
|
|
|
1462
|
|
|
1463 int
|
|
|
1464 proper_redisplay_wrapping_in_place (void)
|
|
|
1465 {
|
|
|
1466 return !in_display
|
|
|
1467 || ((get_inhibit_flags () & INTERNAL_INHIBIT_ERRORS)
|
|
|
1468 && (get_inhibit_flags () & INTERNAL_INHIBIT_THROWS));
|
|
|
1469 }
|
|
|
1470
|
|
|
1471 static void
|
|
|
1472 check_proper_critical_section_nonlocal_exit_protection (void)
|
|
|
1473 {
|
|
|
1474 assert_with_message
|
|
|
1475 (proper_redisplay_wrapping_in_place (),
|
|
|
1476 "Attempted non-local exit from within redisplay without being properly wrapped");
|
|
|
1477 }
|
|
|
1478
|
|
|
1479 static void
|
|
|
1480 check_proper_critical_section_lisp_protection (void)
|
|
|
1481 {
|
|
|
1482 assert_with_message
|
|
|
1483 (proper_redisplay_wrapping_in_place (),
|
|
|
1484 "Attempt to call Lisp code from within redisplay without being properly wrapped");
|
|
|
1485 }
|
|
|
1486
|
|
|
1487 #endif /* ERROR_CHECK_TRAPPING_PROBLEMS */
|
|
|
1488
|
|
428
|
1489 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /*
|
|
|
1490 \(catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'.
|
|
|
1491 TAG is evalled to get the tag to use. Then the BODY is executed.
|
|
3577
|
1492 Within BODY, (throw TAG VAL) with same (`eq') tag exits BODY and this `catch'.
|
|
428
|
1493 If no throw happens, `catch' returns the value of the last BODY form.
|
|
|
1494 If a throw happens, it specifies the value to return from `catch'.
|
|
|
1495 */
|
|
|
1496 (args))
|
|
|
1497 {
|
|
|
1498 /* This function can GC */
|
|
|
1499 Lisp_Object tag = Feval (XCAR (args));
|
|
|
1500 Lisp_Object body = XCDR (args);
|
|
2532
|
1501 return internal_catch (tag, Fprogn, body, 0, 0, 0);
|
|
428
|
1502 }
|
|
|
1503
|
|
|
1504 /* Set up a catch, then call C function FUNC on argument ARG.
|
|
|
1505 FUNC should return a Lisp_Object.
|
|
|
1506 This is how catches are done from within C code. */
|
|
|
1507
|
|
|
1508 Lisp_Object
|
|
|
1509 internal_catch (Lisp_Object tag,
|
|
|
1510 Lisp_Object (*func) (Lisp_Object arg),
|
|
|
1511 Lisp_Object arg,
|
|
853
|
1512 int * volatile threw,
|
|
2532
|
1513 Lisp_Object * volatile thrown_tag,
|
|
|
1514 Lisp_Object * volatile backtrace_before_throw)
|
|
428
|
1515 {
|
|
|
1516 /* This structure is made part of the chain `catchlist'. */
|
|
|
1517 struct catchtag c;
|
|
|
1518
|
|
|
1519 /* Fill in the components of c, and put it on the list. */
|
|
|
1520 c.next = catchlist;
|
|
|
1521 c.tag = tag;
|
|
853
|
1522 c.actual_tag = Qnil;
|
|
2532
|
1523 c.backtrace = Qnil;
|
|
428
|
1524 c.val = Qnil;
|
|
|
1525 c.backlist = backtrace_list;
|
|
|
1526 #if 0 /* FSFmacs */
|
|
|
1527 /* #### */
|
|
|
1528 c.handlerlist = handlerlist;
|
|
|
1529 #endif
|
|
|
1530 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1531 c.pdlcount = specpdl_depth();
|
|
|
1532 #if 0 /* FSFmacs */
|
|
|
1533 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1534 #endif
|
|
|
1535 c.gcpro = gcprolist;
|
|
|
1536 catchlist = &c;
|
|
|
1537
|
|
|
1538 /* Call FUNC. */
|
|
|
1539 if (SETJMP (c.jmp))
|
|
|
1540 {
|
|
|
1541 /* Throw works by a longjmp that comes right here. */
|
|
|
1542 if (threw) *threw = 1;
|
|
853
|
1543 if (thrown_tag) *thrown_tag = c.actual_tag;
|
|
2532
|
1544 if (backtrace_before_throw) *backtrace_before_throw = c.backtrace;
|
|
428
|
1545 return c.val;
|
|
|
1546 }
|
|
|
1547 c.val = (*func) (arg);
|
|
|
1548 if (threw) *threw = 0;
|
|
853
|
1549 if (thrown_tag) *thrown_tag = Qnil;
|
|
428
|
1550 catchlist = c.next;
|
|
853
|
1551 check_catchlist_sanity ();
|
|
428
|
1552 return c.val;
|
|
|
1553 }
|
|
|
1554
|
|
|
1555
|
|
|
1556 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
|
|
|
1557 jump to that CATCH, returning VALUE as the value of that catch.
|
|
|
1558
|
|
2297
|
1559 This is the guts of Fthrow and Fsignal; they differ only in the
|
|
|
1560 way they choose the catch tag to throw to. A catch tag for a
|
|
428
|
1561 condition-case form has a TAG of Qnil.
|
|
|
1562
|
|
|
1563 Before each catch is discarded, unbind all special bindings and
|
|
|
1564 execute all unwind-protect clauses made above that catch. Unwind
|
|
|
1565 the handler stack as we go, so that the proper handlers are in
|
|
|
1566 effect for each unwind-protect clause we run. At the end, restore
|
|
|
1567 some static info saved in CATCH, and longjmp to the location
|
|
|
1568 specified in the
|
|
|
1569
|
|
|
1570 This is used for correct unwinding in Fthrow and Fsignal. */
|
|
|
1571
|
|
2268
|
1572 static DECLARE_DOESNT_RETURN (unwind_to_catch (struct catchtag *, Lisp_Object,
|
|
|
1573 Lisp_Object));
|
|
|
1574
|
|
|
1575 static DOESNT_RETURN
|
|
853
|
1576 unwind_to_catch (struct catchtag *c, Lisp_Object val, Lisp_Object tag)
|
|
428
|
1577 {
|
|
|
1578 REGISTER int last_time;
|
|
|
1579
|
|
|
1580 /* Unwind the specbind, catch, and handler stacks back to CATCH
|
|
|
1581 Before each catch is discarded, unbind all special bindings
|
|
|
1582 and execute all unwind-protect clauses made above that catch.
|
|
|
1583 At the end, restore some static info saved in CATCH,
|
|
|
1584 and longjmp to the location specified.
|
|
|
1585 */
|
|
|
1586
|
|
|
1587 /* Save the value somewhere it will be GC'ed.
|
|
|
1588 (Can't overwrite tag slot because an unwind-protect may
|
|
|
1589 want to throw to this same tag, which isn't yet invalid.) */
|
|
|
1590 c->val = val;
|
|
853
|
1591 c->actual_tag = tag;
|
|
428
|
1592
|
|
|
1593 #if 0 /* FSFmacs */
|
|
|
1594 /* Restore the polling-suppression count. */
|
|
|
1595 set_poll_suppress_count (catch->poll_suppress_count);
|
|
|
1596 #endif
|
|
|
1597
|
|
617
|
1598 #if 1
|
|
428
|
1599 do
|
|
|
1600 {
|
|
|
1601 last_time = catchlist == c;
|
|
|
1602
|
|
|
1603 /* Unwind the specpdl stack, and then restore the proper set of
|
|
|
1604 handlers. */
|
|
771
|
1605 unbind_to (catchlist->pdlcount);
|
|
428
|
1606 catchlist = catchlist->next;
|
|
853
|
1607 check_catchlist_sanity ();
|
|
428
|
1608 }
|
|
|
1609 while (! last_time);
|
|
617
|
1610 #else
|
|
|
1611 /* Former XEmacs code. This is definitely not as correct because
|
|
|
1612 there may be a number of catches we're unwinding, and a number
|
|
|
1613 of unwind-protects in the process. By not undoing the catches till
|
|
|
1614 the end, there may be invalid catches still current. (This would
|
|
|
1615 be a particular problem with code like this:
|
|
|
1616
|
|
|
1617 (catch 'foo
|
|
|
1618 (call-some-code-which-does...
|
|
|
1619 (catch 'bar
|
|
|
1620 (unwind-protect
|
|
|
1621 (call-some-code-which-does...
|
|
|
1622 (catch 'bar
|
|
|
1623 (call-some-code-which-does...
|
|
|
1624 (throw 'foo nil))))
|
|
|
1625 (throw 'bar nil)))))
|
|
|
1626
|
|
|
1627 This would try to throw to the inner (catch 'bar)!
|
|
|
1628
|
|
|
1629 --ben
|
|
|
1630 */
|
|
428
|
1631 /* Unwind the specpdl stack */
|
|
771
|
1632 unbind_to (c->pdlcount);
|
|
428
|
1633 catchlist = c->next;
|
|
853
|
1634 check_catchlist_sanity ();
|
|
617
|
1635 #endif /* Former code */
|
|
428
|
1636
|
|
1204
|
1637 UNWIND_GCPRO_TO (c->gcpro);
|
|
1292
|
1638 if (profiling_active)
|
|
|
1639 {
|
|
|
1640 while (backtrace_list != c->backlist)
|
|
|
1641 {
|
|
|
1642 profile_record_unwind (backtrace_list);
|
|
|
1643 backtrace_list = backtrace_list->next;
|
|
|
1644 }
|
|
|
1645 }
|
|
|
1646 else
|
|
|
1647 backtrace_list = c->backlist;
|
|
428
|
1648 lisp_eval_depth = c->lisp_eval_depth;
|
|
|
1649
|
|
442
|
1650 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
1651 throw_level = 0;
|
|
|
1652 #endif
|
|
|
1653 LONGJMP (c->jmp, 1);
|
|
|
1654 }
|
|
|
1655
|
|
2268
|
1656 static DECLARE_DOESNT_RETURN (throw_or_bomb_out (Lisp_Object, Lisp_Object, int,
|
|
|
1657 Lisp_Object, Lisp_Object));
|
|
|
1658
|
|
428
|
1659 static DOESNT_RETURN
|
|
|
1660 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p,
|
|
|
1661 Lisp_Object sig, Lisp_Object data)
|
|
|
1662 {
|
|
442
|
1663 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
1664 /* die if we recurse more than is reasonable */
|
|
|
1665 if (++throw_level > 20)
|
|
2500
|
1666 ABORT ();
|
|
428
|
1667 #endif
|
|
|
1668
|
|
1318
|
1669 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS
|
|
1123
|
1670 check_proper_critical_section_nonlocal_exit_protection ();
|
|
1318
|
1671 #endif
|
|
1123
|
1672
|
|
428
|
1673 /* If bomb_out_p is t, this is being called from Fsignal as a
|
|
|
1674 "last resort" when there is no handler for this error and
|
|
|
1675 the debugger couldn't be invoked, so we are throwing to
|
|
3025
|
1676 `top-level'. If this tag doesn't exist (happens during the
|
|
428
|
1677 initialization stages) we would get in an infinite recursive
|
|
|
1678 Fsignal/Fthrow loop, so instead we bomb out to the
|
|
|
1679 really-early-error-handler.
|
|
|
1680
|
|
|
1681 Note that in fact the only time that the "last resort"
|
|
3025
|
1682 occurs is when there's no catch for `top-level' -- the
|
|
|
1683 `top-level' catch and the catch-all error handler are
|
|
428
|
1684 established at the same time, in initial_command_loop/
|
|
|
1685 top_level_1.
|
|
|
1686
|
|
853
|
1687 [[#### Fix this horrifitude!]]
|
|
|
1688
|
|
|
1689 I don't think this is horrifitude, just defensive programming. --ben
|
|
428
|
1690 */
|
|
|
1691
|
|
|
1692 while (1)
|
|
|
1693 {
|
|
|
1694 REGISTER struct catchtag *c;
|
|
|
1695
|
|
|
1696 #if 0 /* FSFmacs */
|
|
|
1697 if (!NILP (tag)) /* #### */
|
|
|
1698 #endif
|
|
|
1699 for (c = catchlist; c; c = c->next)
|
|
|
1700 {
|
|
2532
|
1701 if (EQ (c->tag, Vcatch_everything_tag))
|
|
|
1702 c->backtrace = maybe_get_trapping_problems_backtrace ();
|
|
853
|
1703 if (EQ (c->tag, tag) || EQ (c->tag, Vcatch_everything_tag))
|
|
|
1704 unwind_to_catch (c, val, tag);
|
|
428
|
1705 }
|
|
|
1706 if (!bomb_out_p)
|
|
|
1707 tag = Fsignal (Qno_catch, list2 (tag, val));
|
|
|
1708 else
|
|
|
1709 call1 (Qreally_early_error_handler, Fcons (sig, data));
|
|
|
1710 }
|
|
|
1711 }
|
|
|
1712
|
|
|
1713 /* See above, where CATCHLIST is defined, for a description of how
|
|
|
1714 Fthrow() works.
|
|
|
1715
|
|
|
1716 Fthrow() is also called by Fsignal(), to do a non-local jump
|
|
|
1717 back to the appropriate condition-case handler after (maybe)
|
|
|
1718 the debugger is entered. In that case, TAG is the value
|
|
|
1719 of Vcondition_handlers that was in place just after the
|
|
|
1720 condition-case handler was set up. The car of this will be
|
|
|
1721 some data referring to the handler: Its car will be Qunbound
|
|
|
1722 (thus, this tag can never be generated by Lisp code), and
|
|
|
1723 its CDR will be the HANDLERS argument to condition_case_1()
|
|
|
1724 (either Qerror, Qt, or a list of handlers as in `condition-case').
|
|
|
1725 This works fine because Fthrow() does not care what TAG was
|
|
|
1726 passed to it: it just looks up the catch list for something
|
|
|
1727 that is EQ() to TAG. When it finds it, it will longjmp()
|
|
|
1728 back to the place that established the catch (in this case,
|
|
|
1729 condition_case_1). See below for more info.
|
|
|
1730 */
|
|
|
1731
|
|
2268
|
1732 DEFUN_NORETURN ("throw", Fthrow, 2, 2, 0, /*
|
|
444
|
1733 Throw to the catch for TAG and return VALUE from it.
|
|
2297
|
1734 Both TAG and VALUE are evalled. Tags are the same iff they are `eq'.
|
|
428
|
1735 */
|
|
444
|
1736 (tag, value))
|
|
|
1737 {
|
|
|
1738 throw_or_bomb_out (tag, value, 0, Qnil, Qnil); /* Doesn't return */
|
|
2268
|
1739 RETURN_NOT_REACHED (Qnil);
|
|
428
|
1740 }
|
|
|
1741
|
|
|
1742 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /*
|
|
|
1743 Do BODYFORM, protecting with UNWINDFORMS.
|
|
|
1744 Usage looks like (unwind-protect BODYFORM UNWINDFORMS...).
|
|
|
1745 If BODYFORM completes normally, its value is returned
|
|
|
1746 after executing the UNWINDFORMS.
|
|
|
1747 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
|
|
|
1748 */
|
|
|
1749 (args))
|
|
|
1750 {
|
|
|
1751 /* This function can GC */
|
|
|
1752 int speccount = specpdl_depth();
|
|
|
1753
|
|
|
1754 record_unwind_protect (Fprogn, XCDR (args));
|
|
771
|
1755 return unbind_to_1 (speccount, Feval (XCAR (args)));
|
|
428
|
1756 }
|
|
|
1757
|
|
|
1758
|
|
|
1759 /************************************************************************/
|
|
1292
|
1760 /* Trapping errors */
|
|
428
|
1761 /************************************************************************/
|
|
|
1762
|
|
|
1763 static Lisp_Object
|
|
|
1764 condition_bind_unwind (Lisp_Object loser)
|
|
|
1765 {
|
|
617
|
1766 /* There is no problem freeing stuff here like there is in
|
|
|
1767 condition_case_unwind(), because there are no outside pointers
|
|
|
1768 (like the tag below in the catchlist) pointing to the objects. */
|
|
853
|
1769
|
|
428
|
1770 /* ((handler-fun . handler-args) ... other handlers) */
|
|
|
1771 Lisp_Object tem = XCAR (loser);
|
|
853
|
1772 int first = 1;
|
|
428
|
1773
|
|
|
1774 while (CONSP (tem))
|
|
|
1775 {
|
|
853
|
1776 Lisp_Object victim = tem;
|
|
|
1777 if (first && OPAQUE_PTRP (XCAR (victim)))
|
|
|
1778 free_opaque_ptr (XCAR (victim));
|
|
|
1779 first = 0;
|
|
|
1780 tem = XCDR (victim);
|
|
428
|
1781 free_cons (victim);
|
|
|
1782 }
|
|
|
1783
|
|
|
1784 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
853
|
1785 Vcondition_handlers = XCDR (loser);
|
|
|
1786
|
|
|
1787 free_cons (loser);
|
|
428
|
1788 return Qnil;
|
|
|
1789 }
|
|
|
1790
|
|
|
1791 static Lisp_Object
|
|
|
1792 condition_case_unwind (Lisp_Object loser)
|
|
|
1793 {
|
|
|
1794 /* ((<unbound> . clauses) ... other handlers */
|
|
617
|
1795 /* NO! Doing this now leaves the tag deleted in a still-active
|
|
|
1796 catch. With the recent changes to unwind_to_catch(), the
|
|
|
1797 evil situation might not happen any more; it certainly could
|
|
|
1798 happen before because it did. But it's very precarious to rely
|
|
|
1799 on something like this. #### Instead we should rewrite, adopting
|
|
|
1800 the FSF's mechanism with a struct handler instead of
|
|
|
1801 Vcondition_handlers; then we have NO Lisp-object structures used
|
|
|
1802 to hold all of the values, and there's no possibility either of
|
|
|
1803 crashes from freeing objects too quickly, or objects not getting
|
|
|
1804 freed and hanging around till the next GC.
|
|
|
1805
|
|
|
1806 In practice, the extra consing here should not matter because
|
|
|
1807 it only happens when we throw past the condition-case, which almost
|
|
|
1808 always is the result of an error. Most of the time, there will be
|
|
|
1809 no error, and we will free the objects below in the main function.
|
|
|
1810
|
|
|
1811 --ben
|
|
|
1812
|
|
|
1813 DO NOT DO: free_cons (XCAR (loser));
|
|
|
1814 */
|
|
|
1815
|
|
428
|
1816 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
617
|
1817 Vcondition_handlers = XCDR (loser);
|
|
|
1818
|
|
|
1819 /* DO NOT DO: free_cons (loser); */
|
|
428
|
1820 return Qnil;
|
|
|
1821 }
|
|
|
1822
|
|
|
1823 /* Split out from condition_case_3 so that primitive C callers
|
|
|
1824 don't have to cons up a lisp handler form to be evaluated. */
|
|
|
1825
|
|
|
1826 /* Call a function BFUN of one argument BARG, trapping errors as
|
|
|
1827 specified by HANDLERS. If no error occurs that is indicated by
|
|
|
1828 HANDLERS as something to be caught, the return value of this
|
|
|
1829 function is the return value from BFUN. If such an error does
|
|
|
1830 occur, HFUN is called, and its return value becomes the
|
|
|
1831 return value of condition_case_1(). The second argument passed
|
|
|
1832 to HFUN will always be HARG. The first argument depends on
|
|
|
1833 HANDLERS:
|
|
|
1834
|
|
|
1835 If HANDLERS is Qt, all errors (this includes QUIT, but not
|
|
|
1836 non-local exits with `throw') cause HFUN to be invoked, and VAL
|
|
|
1837 (the first argument to HFUN) is a cons (SIG . DATA) of the
|
|
|
1838 arguments passed to `signal'. The debugger is not invoked even if
|
|
|
1839 `debug-on-error' was set.
|
|
|
1840
|
|
|
1841 A HANDLERS value of Qerror is the same as Qt except that the
|
|
|
1842 debugger is invoked if `debug-on-error' was set.
|
|
|
1843
|
|
|
1844 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...)
|
|
|
1845 exactly as in `condition-case', and errors will be trapped
|
|
|
1846 as indicated in HANDLERS. VAL (the first argument to HFUN) will
|
|
|
1847 be a cons whose car is the cons (SIG . DATA) and whose CDR is the
|
|
|
1848 list (BODY ...) from the appropriate slot in HANDLERS.
|
|
|
1849
|
|
|
1850 This function pushes HANDLERS onto the front of Vcondition_handlers
|
|
|
1851 (actually with a Qunbound marker as well -- see Fthrow() above
|
|
|
1852 for why), establishes a catch whose tag is this new value of
|
|
|
1853 Vcondition_handlers, and calls BFUN. When Fsignal() is called,
|
|
|
1854 it calls Fthrow(), setting TAG to this same new value of
|
|
|
1855 Vcondition_handlers and setting VAL to the same thing that will
|
|
|
1856 be passed to HFUN, as above. Fthrow() longjmp()s back to the
|
|
|
1857 jump point we just established, and we in turn just call the
|
|
|
1858 HFUN and return its value.
|
|
|
1859
|
|
|
1860 For a real condition-case, HFUN will always be
|
|
|
1861 run_condition_case_handlers() and HARG is the argument VAR
|
|
|
1862 to condition-case. That function just binds VAR to the cons
|
|
|
1863 (SIG . DATA) that is the CAR of VAL, and calls the handler
|
|
|
1864 (BODY ...) that is the CDR of VAL. Note that before calling
|
|
|
1865 Fthrow(), Fsignal() restored Vcondition_handlers to the value
|
|
|
1866 it had *before* condition_case_1() was called. This maintains
|
|
|
1867 consistency (so that the state of things at exit of
|
|
|
1868 condition_case_1() is the same as at entry), and implies
|
|
|
1869 that the handler can signal the same error again (possibly
|
|
|
1870 after processing of its own), without getting in an infinite
|
|
|
1871 loop. */
|
|
|
1872
|
|
|
1873 Lisp_Object
|
|
|
1874 condition_case_1 (Lisp_Object handlers,
|
|
|
1875 Lisp_Object (*bfun) (Lisp_Object barg),
|
|
|
1876 Lisp_Object barg,
|
|
|
1877 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg),
|
|
|
1878 Lisp_Object harg)
|
|
|
1879 {
|
|
|
1880 int speccount = specpdl_depth();
|
|
|
1881 struct catchtag c;
|
|
617
|
1882 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
428
|
1883
|
|
|
1884 #if 0 /* FSFmacs */
|
|
|
1885 c.tag = Qnil;
|
|
|
1886 #else
|
|
|
1887 /* Do consing now so out-of-memory error happens up front */
|
|
|
1888 /* (unbound . stuff) is a special condition-case kludge marker
|
|
|
1889 which is known specially by Fsignal.
|
|
617
|
1890 [[ This is an abomination, but to fix it would require either
|
|
428
|
1891 making condition_case cons (a union of the conditions of the clauses)
|
|
617
|
1892 or changing the byte-compiler output (no thanks).]]
|
|
|
1893
|
|
|
1894 The above comment is clearly wrong. FSF does not do it this way
|
|
|
1895 and did not change the byte-compiler output. Instead they use a
|
|
|
1896 `struct handler' to hold the various values (in place of our
|
|
|
1897 Vcondition_handlers) and chain them together, with pointers from
|
|
|
1898 the `struct catchtag' to the `struct handler'. We should perhaps
|
|
|
1899 consider moving to something similar, but not before I merge my
|
|
|
1900 stderr-proc workspace, which contains changes to these
|
|
|
1901 functions. --ben */
|
|
428
|
1902 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers),
|
|
|
1903 Vcondition_handlers);
|
|
|
1904 #endif
|
|
|
1905 c.val = Qnil;
|
|
853
|
1906 c.actual_tag = Qnil;
|
|
2532
|
1907 c.backtrace = Qnil;
|
|
428
|
1908 c.backlist = backtrace_list;
|
|
|
1909 #if 0 /* FSFmacs */
|
|
|
1910 /* #### */
|
|
|
1911 c.handlerlist = handlerlist;
|
|
|
1912 #endif
|
|
|
1913 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1914 c.pdlcount = specpdl_depth();
|
|
|
1915 #if 0 /* FSFmacs */
|
|
|
1916 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1917 #endif
|
|
|
1918 c.gcpro = gcprolist;
|
|
|
1919 /* #### FSFmacs does the following statement *after* the setjmp(). */
|
|
|
1920 c.next = catchlist;
|
|
|
1921
|
|
|
1922 if (SETJMP (c.jmp))
|
|
|
1923 {
|
|
|
1924 /* throw does ungcpro, etc */
|
|
|
1925 return (*hfun) (c.val, harg);
|
|
|
1926 }
|
|
|
1927
|
|
|
1928 record_unwind_protect (condition_case_unwind, c.tag);
|
|
|
1929
|
|
|
1930 catchlist = &c;
|
|
|
1931 #if 0 /* FSFmacs */
|
|
|
1932 h.handler = handlers;
|
|
|
1933 h.var = Qnil;
|
|
|
1934 h.next = handlerlist;
|
|
|
1935 h.tag = &c;
|
|
|
1936 handlerlist = &h;
|
|
|
1937 #else
|
|
|
1938 Vcondition_handlers = c.tag;
|
|
|
1939 #endif
|
|
|
1940 GCPRO1 (harg); /* Somebody has to gc-protect */
|
|
|
1941 c.val = ((*bfun) (barg));
|
|
|
1942 UNGCPRO;
|
|
617
|
1943
|
|
|
1944 /* Once we change `catchlist' below, the stuff in c will not be GCPRO'd. */
|
|
|
1945 GCPRO3 (harg, c.val, c.tag);
|
|
|
1946
|
|
428
|
1947 catchlist = c.next;
|
|
853
|
1948 check_catchlist_sanity ();
|
|
617
|
1949 /* Note: The unbind also resets Vcondition_handlers. Maybe we should
|
|
|
1950 delete this here. */
|
|
428
|
1951 Vcondition_handlers = XCDR (c.tag);
|
|
771
|
1952 unbind_to (speccount);
|
|
617
|
1953
|
|
|
1954 UNGCPRO;
|
|
|
1955 /* free the conses *after* the unbind, because the unbind will run
|
|
|
1956 condition_case_unwind above. */
|
|
853
|
1957 free_cons (XCAR (c.tag));
|
|
|
1958 free_cons (c.tag);
|
|
617
|
1959 return c.val;
|
|
428
|
1960 }
|
|
|
1961
|
|
|
1962 static Lisp_Object
|
|
|
1963 run_condition_case_handlers (Lisp_Object val, Lisp_Object var)
|
|
|
1964 {
|
|
|
1965 /* This function can GC */
|
|
|
1966 #if 0 /* FSFmacs */
|
|
|
1967 if (!NILP (h.var))
|
|
|
1968 specbind (h.var, c.val);
|
|
|
1969 val = Fprogn (Fcdr (h.chosen_clause));
|
|
|
1970
|
|
|
1971 /* Note that this just undoes the binding of h.var; whoever
|
|
|
1972 longjmp()ed to us unwound the stack to c.pdlcount before
|
|
|
1973 throwing. */
|
|
771
|
1974 unbind_to (c.pdlcount);
|
|
428
|
1975 return val;
|
|
|
1976 #else
|
|
|
1977 int speccount;
|
|
|
1978
|
|
|
1979 CHECK_TRUE_LIST (val);
|
|
|
1980 if (NILP (var))
|
|
|
1981 return Fprogn (Fcdr (val)); /* tail call */
|
|
|
1982
|
|
|
1983 speccount = specpdl_depth();
|
|
|
1984 specbind (var, Fcar (val));
|
|
|
1985 val = Fprogn (Fcdr (val));
|
|
771
|
1986 return unbind_to_1 (speccount, val);
|
|
428
|
1987 #endif
|
|
|
1988 }
|
|
|
1989
|
|
|
1990 /* Here for bytecode to call non-consfully. This is exactly like
|
|
|
1991 condition-case except that it takes three arguments rather
|
|
|
1992 than a single list of arguments. */
|
|
|
1993 Lisp_Object
|
|
|
1994 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers)
|
|
|
1995 {
|
|
|
1996 /* This function can GC */
|
|
|
1997 EXTERNAL_LIST_LOOP_2 (handler, handlers)
|
|
|
1998 {
|
|
|
1999 if (NILP (handler))
|
|
|
2000 ;
|
|
|
2001 else if (CONSP (handler))
|
|
|
2002 {
|
|
|
2003 Lisp_Object conditions = XCAR (handler);
|
|
|
2004 /* CONDITIONS must a condition name or a list of condition names */
|
|
|
2005 if (SYMBOLP (conditions))
|
|
|
2006 ;
|
|
|
2007 else
|
|
|
2008 {
|
|
|
2009 EXTERNAL_LIST_LOOP_2 (condition, conditions)
|
|
|
2010 if (!SYMBOLP (condition))
|
|
|
2011 goto invalid_condition_handler;
|
|
|
2012 }
|
|
|
2013 }
|
|
|
2014 else
|
|
|
2015 {
|
|
|
2016 invalid_condition_handler:
|
|
563
|
2017 sferror ("Invalid condition handler", handler);
|
|
428
|
2018 }
|
|
|
2019 }
|
|
|
2020
|
|
|
2021 CHECK_SYMBOL (var);
|
|
|
2022
|
|
|
2023 return condition_case_1 (handlers,
|
|
|
2024 Feval, bodyform,
|
|
|
2025 run_condition_case_handlers,
|
|
|
2026 var);
|
|
|
2027 }
|
|
|
2028
|
|
|
2029 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /*
|
|
|
2030 Regain control when an error is signalled.
|
|
|
2031 Usage looks like (condition-case VAR BODYFORM HANDLERS...).
|
|
|
2032 Executes BODYFORM and returns its value if no error happens.
|
|
|
2033 Each element of HANDLERS looks like (CONDITION-NAME BODY...)
|
|
|
2034 where the BODY is made of Lisp expressions.
|
|
|
2035
|
|
771
|
2036 A typical usage of `condition-case' looks like this:
|
|
|
2037
|
|
|
2038 (condition-case nil
|
|
|
2039 ;; you need a progn here if you want more than one statement ...
|
|
|
2040 (progn
|
|
|
2041 (do-something)
|
|
|
2042 (do-something-else))
|
|
|
2043 (error
|
|
|
2044 (issue-warning-or)
|
|
|
2045 ;; but strangely, you don't need one here.
|
|
|
2046 (return-a-value-etc)
|
|
|
2047 ))
|
|
|
2048
|
|
428
|
2049 A handler is applicable to an error if CONDITION-NAME is one of the
|
|
|
2050 error's condition names. If an error happens, the first applicable
|
|
|
2051 handler is run. As a special case, a CONDITION-NAME of t matches
|
|
|
2052 all errors, even those without the `error' condition name on them
|
|
|
2053 \(e.g. `quit').
|
|
|
2054
|
|
|
2055 The car of a handler may be a list of condition names
|
|
|
2056 instead of a single condition name.
|
|
|
2057
|
|
|
2058 When a handler handles an error,
|
|
|
2059 control returns to the condition-case and the handler BODY... is executed
|
|
|
2060 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).
|
|
|
2061 VAR may be nil; then you do not get access to the signal information.
|
|
|
2062
|
|
|
2063 The value of the last BODY form is returned from the condition-case.
|
|
|
2064 See also the function `signal' for more info.
|
|
|
2065
|
|
|
2066 Note that at the time the condition handler is invoked, the Lisp stack
|
|
|
2067 and the current catches, condition-cases, and bindings have all been
|
|
|
2068 popped back to the state they were in just before the call to
|
|
|
2069 `condition-case'. This means that resignalling the error from
|
|
|
2070 within the handler will not result in an infinite loop.
|
|
|
2071
|
|
|
2072 If you want to establish an error handler that is called with the
|
|
|
2073 Lisp stack, bindings, etc. as they were when `signal' was called,
|
|
|
2074 rather than when the handler was set, use `call-with-condition-handler'.
|
|
|
2075 */
|
|
|
2076 (args))
|
|
|
2077 {
|
|
|
2078 /* This function can GC */
|
|
|
2079 Lisp_Object var = XCAR (args);
|
|
|
2080 Lisp_Object bodyform = XCAR (XCDR (args));
|
|
|
2081 Lisp_Object handlers = XCDR (XCDR (args));
|
|
|
2082 return condition_case_3 (bodyform, var, handlers);
|
|
|
2083 }
|
|
|
2084
|
|
|
2085 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /*
|
|
|
2086 Regain control when an error is signalled, without popping the stack.
|
|
|
2087 Usage looks like (call-with-condition-handler HANDLER FUNCTION &rest ARGS).
|
|
|
2088 This function is similar to `condition-case', but the handler is invoked
|
|
|
2089 with the same environment (Lisp stack, bindings, catches, condition-cases)
|
|
|
2090 that was current when `signal' was called, rather than when the handler
|
|
|
2091 was established.
|
|
|
2092
|
|
|
2093 HANDLER should be a function of one argument, which is a cons of the args
|
|
|
2094 \(SIG . DATA) that were passed to `signal'. It is invoked whenever
|
|
|
2095 `signal' is called (this differs from `condition-case', which allows
|
|
|
2096 you to specify which errors are trapped). If the handler function
|
|
|
2097 returns, `signal' continues as if the handler were never invoked.
|
|
|
2098 \(It continues to look for handlers established earlier than this one,
|
|
|
2099 and invokes the standard error-handler if none is found.)
|
|
|
2100 */
|
|
|
2101 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */
|
|
|
2102 {
|
|
|
2103 /* This function can GC */
|
|
|
2104 int speccount = specpdl_depth();
|
|
|
2105 Lisp_Object tem;
|
|
|
2106
|
|
853
|
2107 tem = Ffunction_max_args (args[0]);
|
|
|
2108 if (! (XINT (Ffunction_min_args (args[0])) <= 1
|
|
|
2109 && (NILP (tem) || 1 <= XINT (tem))))
|
|
|
2110 invalid_argument ("Must be function of one argument", args[0]);
|
|
|
2111
|
|
|
2112 /* (handler-fun . handler-args) but currently there are no handler-args */
|
|
428
|
2113 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers);
|
|
|
2114 record_unwind_protect (condition_bind_unwind, tem);
|
|
|
2115 Vcondition_handlers = tem;
|
|
|
2116
|
|
|
2117 /* Caller should have GC-protected args */
|
|
771
|
2118 return unbind_to_1 (speccount, Ffuncall (nargs - 1, args + 1));
|
|
428
|
2119 }
|
|
|
2120
|
|
853
|
2121 /* This is the C version of the above function. It calls FUN, passing it
|
|
|
2122 ARG, first setting up HANDLER to catch signals in the environment in
|
|
|
2123 which they were signalled. (HANDLER is only invoked if there was no
|
|
|
2124 handler (either from condition-case or call-with-condition-handler) set
|
|
|
2125 later on that handled the signal; therefore, this is a real error.
|
|
|
2126
|
|
|
2127 HANDLER is invoked with three arguments: the ERROR-SYMBOL and DATA as
|
|
|
2128 passed to `signal', and HANDLER_ARG. Originally I made HANDLER_ARG and
|
|
|
2129 ARG be void * to facilitate passing structures, but I changed to
|
|
|
2130 Lisp_Objects because all the other C interfaces to catch/condition-case/etc.
|
|
|
2131 take Lisp_Objects, and it is easy enough to use make_opaque_ptr() et al.
|
|
|
2132 to convert between Lisp_Objects and structure pointers. */
|
|
|
2133
|
|
|
2134 Lisp_Object
|
|
|
2135 call_with_condition_handler (Lisp_Object (*handler) (Lisp_Object, Lisp_Object,
|
|
|
2136 Lisp_Object),
|
|
|
2137 Lisp_Object handler_arg,
|
|
|
2138 Lisp_Object (*fun) (Lisp_Object),
|
|
|
2139 Lisp_Object arg)
|
|
|
2140 {
|
|
|
2141 /* This function can GC */
|
|
1111
|
2142 int speccount = specpdl_depth ();
|
|
853
|
2143 Lisp_Object tem;
|
|
|
2144
|
|
|
2145 /* ((handler-fun . (handler-arg . nil)) ... ) */
|
|
1111
|
2146 tem = noseeum_cons (noseeum_cons (make_opaque_ptr ((void *) handler),
|
|
853
|
2147 noseeum_cons (handler_arg, Qnil)),
|
|
|
2148 Vcondition_handlers);
|
|
|
2149 record_unwind_protect (condition_bind_unwind, tem);
|
|
|
2150 Vcondition_handlers = tem;
|
|
|
2151
|
|
|
2152 return unbind_to_1 (speccount, (*fun) (arg));
|
|
|
2153 }
|
|
|
2154
|
|
428
|
2155 static int
|
|
|
2156 condition_type_p (Lisp_Object type, Lisp_Object conditions)
|
|
|
2157 {
|
|
|
2158 if (EQ (type, Qt))
|
|
|
2159 /* (condition-case c # (t c)) catches -all- signals
|
|
|
2160 * Use with caution! */
|
|
|
2161 return 1;
|
|
|
2162
|
|
|
2163 if (SYMBOLP (type))
|
|
|
2164 return !NILP (Fmemq (type, conditions));
|
|
|
2165
|
|
|
2166 for (; CONSP (type); type = XCDR (type))
|
|
|
2167 if (!NILP (Fmemq (XCAR (type), conditions)))
|
|
|
2168 return 1;
|
|
|
2169
|
|
|
2170 return 0;
|
|
|
2171 }
|
|
|
2172
|
|
|
2173 static Lisp_Object
|
|
|
2174 return_from_signal (Lisp_Object value)
|
|
|
2175 {
|
|
|
2176 #if 1
|
|
|
2177 /* Most callers are not prepared to handle gc if this
|
|
|
2178 returns. So, since this feature is not very useful,
|
|
|
2179 take it out. */
|
|
|
2180 /* Have called debugger; return value to signaller */
|
|
|
2181 return value;
|
|
|
2182 #else /* But the reality is that that stinks, because: */
|
|
|
2183 /* GACK!!! Really want some way for debug-on-quit errors
|
|
|
2184 to be continuable!! */
|
|
563
|
2185 signal_error (Qunimplemented,
|
|
|
2186 "Returning a value from an error is no longer supported",
|
|
|
2187 Qunbound);
|
|
428
|
2188 #endif
|
|
|
2189 }
|
|
|
2190
|
|
|
2191
|
|
|
2192 /************************************************************************/
|
|
|
2193 /* the workhorse error-signaling function */
|
|
|
2194 /************************************************************************/
|
|
|
2195
|
|
853
|
2196 /* This exists only for debugging purposes, as a place to put a breakpoint
|
|
|
2197 that won't get signalled for errors occurring when
|
|
|
2198 call_with_suspended_errors() was invoked. */
|
|
|
2199
|
|
872
|
2200 /* Don't make static or it might be compiled away */
|
|
|
2201 void signal_1 (void);
|
|
|
2202
|
|
|
2203 void
|
|
853
|
2204 signal_1 (void)
|
|
|
2205 {
|
|
|
2206 }
|
|
|
2207
|
|
428
|
2208 /* #### This function has not been synched with FSF. It diverges
|
|
|
2209 significantly. */
|
|
|
2210
|
|
853
|
2211 /* The simplest external error function: it would be called
|
|
|
2212 signal_continuable_error() in the terminology below, but it's
|
|
|
2213 Lisp-callable. */
|
|
|
2214
|
|
|
2215 DEFUN ("signal", Fsignal, 2, 2, 0, /*
|
|
|
2216 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA.
|
|
|
2217 An error symbol is a symbol defined using `define-error'.
|
|
|
2218 DATA should be a list. Its elements are printed as part of the error message.
|
|
|
2219 If the signal is handled, DATA is made available to the handler.
|
|
|
2220 See also the function `signal-error', and the functions to handle errors:
|
|
|
2221 `condition-case' and `call-with-condition-handler'.
|
|
|
2222
|
|
|
2223 Note that this function can return, if the debugger is invoked and the
|
|
|
2224 user invokes the "return from signal" option.
|
|
|
2225 */
|
|
|
2226 (error_symbol, data))
|
|
428
|
2227 {
|
|
|
2228 /* This function can GC */
|
|
853
|
2229 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
2230 Lisp_Object conditions = Qnil;
|
|
|
2231 Lisp_Object handlers = Qnil;
|
|
428
|
2232 /* signal_call_debugger() could get called more than once
|
|
|
2233 (once when a call-with-condition-handler is about to
|
|
|
2234 be dealt with, and another when a condition-case handler
|
|
|
2235 is about to be invoked). So make sure the debugger and/or
|
|
|
2236 stack trace aren't done more than once. */
|
|
|
2237 int stack_trace_displayed = 0;
|
|
|
2238 int debugger_entered = 0;
|
|
853
|
2239
|
|
|
2240 /* Fsignal() is one of these functions that's called all the time
|
|
|
2241 with newly-created Lisp objects. We allow this; but we must GC-
|
|
|
2242 protect the objects because all sorts of weird stuff could
|
|
|
2243 happen. */
|
|
|
2244
|
|
|
2245 GCPRO4 (conditions, handlers, error_symbol, data);
|
|
|
2246
|
|
|
2247 if (!(inhibit_flags & CALL_WITH_SUSPENDED_ERRORS))
|
|
|
2248 signal_1 ();
|
|
428
|
2249
|
|
|
2250 if (!initialized)
|
|
|
2251 {
|
|
|
2252 /* who knows how much has been initialized? Safest bet is
|
|
|
2253 just to bomb out immediately. */
|
|
771
|
2254 stderr_out ("Error before initialization is complete!\n");
|
|
2500
|
2255 ABORT ();
|
|
428
|
2256 }
|
|
|
2257
|
|
3092
|
2258 #ifndef NEW_GC
|
|
1123
|
2259 assert (!gc_in_progress);
|
|
3092
|
2260 #endif /* not NEW_GC */
|
|
1123
|
2261
|
|
|
2262 /* We abort if in_display and we are not protected, as garbage
|
|
|
2263 collections and non-local exits will invariably be fatal, but in
|
|
|
2264 messy, difficult-to-debug ways. See enter_redisplay_critical_section().
|
|
|
2265 */
|
|
|
2266
|
|
1318
|
2267 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS
|
|
1123
|
2268 check_proper_critical_section_nonlocal_exit_protection ();
|
|
1318
|
2269 #endif
|
|
428
|
2270
|
|
853
|
2271 conditions = Fget (error_symbol, Qerror_conditions, Qnil);
|
|
428
|
2272
|
|
|
2273 for (handlers = Vcondition_handlers;
|
|
|
2274 CONSP (handlers);
|
|
|
2275 handlers = XCDR (handlers))
|
|
|
2276 {
|
|
|
2277 Lisp_Object handler_fun = XCAR (XCAR (handlers));
|
|
|
2278 Lisp_Object handler_data = XCDR (XCAR (handlers));
|
|
|
2279 Lisp_Object outer_handlers = XCDR (handlers);
|
|
|
2280
|
|
|
2281 if (!UNBOUNDP (handler_fun))
|
|
|
2282 {
|
|
|
2283 /* call-with-condition-handler */
|
|
|
2284 Lisp_Object tem;
|
|
|
2285 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
2286 struct gcpro ngcpro1;
|
|
|
2287 NGCPRO1 (all_handlers);
|
|
|
2288 Vcondition_handlers = outer_handlers;
|
|
|
2289
|
|
853
|
2290 tem = signal_call_debugger (conditions, error_symbol, data,
|
|
428
|
2291 outer_handlers, 1,
|
|
|
2292 &stack_trace_displayed,
|
|
|
2293 &debugger_entered);
|
|
|
2294 if (!UNBOUNDP (tem))
|
|
|
2295 RETURN_NUNGCPRO (return_from_signal (tem));
|
|
|
2296
|
|
853
|
2297 if (OPAQUE_PTRP (handler_fun))
|
|
|
2298 {
|
|
|
2299 if (NILP (handler_data))
|
|
|
2300 {
|
|
|
2301 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object) =
|
|
|
2302 (Lisp_Object (*) (Lisp_Object, Lisp_Object))
|
|
|
2303 (get_opaque_ptr (handler_fun));
|
|
|
2304
|
|
|
2305 tem = (*hfun) (error_symbol, data);
|
|
|
2306 }
|
|
|
2307 else
|
|
|
2308 {
|
|
|
2309 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object, Lisp_Object) =
|
|
|
2310 (Lisp_Object (*) (Lisp_Object, Lisp_Object, Lisp_Object))
|
|
|
2311 (get_opaque_ptr (handler_fun));
|
|
|
2312
|
|
|
2313 assert (NILP (XCDR (handler_data)));
|
|
|
2314 tem = (*hfun) (error_symbol, data, XCAR (handler_data));
|
|
|
2315 }
|
|
|
2316 }
|
|
|
2317 else
|
|
|
2318 {
|
|
|
2319 tem = Fcons (error_symbol, data);
|
|
|
2320 if (NILP (handler_data))
|
|
|
2321 tem = call1 (handler_fun, tem);
|
|
|
2322 else
|
|
|
2323 {
|
|
|
2324 /* (This code won't be used (for now?).) */
|
|
|
2325 struct gcpro nngcpro1;
|
|
|
2326 Lisp_Object args[3];
|
|
|
2327 NNGCPRO1 (args[0]);
|
|
|
2328 nngcpro1.nvars = 3;
|
|
|
2329 args[0] = handler_fun;
|
|
|
2330 args[1] = tem;
|
|
|
2331 args[2] = handler_data;
|
|
|
2332 nngcpro1.var = args;
|
|
|
2333 tem = Fapply (3, args);
|
|
|
2334 NNUNGCPRO;
|
|
|
2335 }
|
|
|
2336 }
|
|
428
|
2337 NUNGCPRO;
|
|
|
2338 #if 0
|
|
|
2339 if (!EQ (tem, Qsignal))
|
|
|
2340 return return_from_signal (tem);
|
|
|
2341 #endif
|
|
|
2342 /* If handler didn't throw, try another handler */
|
|
|
2343 Vcondition_handlers = all_handlers;
|
|
|
2344 }
|
|
|
2345
|
|
|
2346 /* It's a condition-case handler */
|
|
|
2347
|
|
|
2348 /* t is used by handlers for all conditions, set up by C code.
|
|
|
2349 * debugger is not called even if debug_on_error */
|
|
|
2350 else if (EQ (handler_data, Qt))
|
|
|
2351 {
|
|
|
2352 UNGCPRO;
|
|
853
|
2353 return Fthrow (handlers, Fcons (error_symbol, data));
|
|
428
|
2354 }
|
|
|
2355 /* `error' is used similarly to the way `t' is used, but in
|
|
|
2356 addition it invokes the debugger if debug_on_error.
|
|
|
2357 This is normally used for the outer command-loop error
|
|
|
2358 handler. */
|
|
|
2359 else if (EQ (handler_data, Qerror))
|
|
|
2360 {
|
|
853
|
2361 Lisp_Object tem = signal_call_debugger (conditions, error_symbol,
|
|
|
2362 data,
|
|
428
|
2363 outer_handlers, 0,
|
|
|
2364 &stack_trace_displayed,
|
|
|
2365 &debugger_entered);
|
|
|
2366
|
|
|
2367 UNGCPRO;
|
|
|
2368 if (!UNBOUNDP (tem))
|
|
|
2369 return return_from_signal (tem);
|
|
|
2370
|
|
853
|
2371 tem = Fcons (error_symbol, data);
|
|
428
|
2372 return Fthrow (handlers, tem);
|
|
|
2373 }
|
|
|
2374 else
|
|
|
2375 {
|
|
|
2376 /* handler established by real (Lisp) condition-case */
|
|
|
2377 Lisp_Object h;
|
|
|
2378
|
|
|
2379 for (h = handler_data; CONSP (h); h = Fcdr (h))
|
|
|
2380 {
|
|
|
2381 Lisp_Object clause = Fcar (h);
|
|
|
2382 Lisp_Object tem = Fcar (clause);
|
|
|
2383
|
|
|
2384 if (condition_type_p (tem, conditions))
|
|
|
2385 {
|
|
853
|
2386 tem = signal_call_debugger (conditions, error_symbol, data,
|
|
428
|
2387 outer_handlers, 1,
|
|
|
2388 &stack_trace_displayed,
|
|
|
2389 &debugger_entered);
|
|
|
2390 UNGCPRO;
|
|
|
2391 if (!UNBOUNDP (tem))
|
|
|
2392 return return_from_signal (tem);
|
|
|
2393
|
|
|
2394 /* Doesn't return */
|
|
853
|
2395 tem = Fcons (Fcons (error_symbol, data), Fcdr (clause));
|
|
428
|
2396 return Fthrow (handlers, tem);
|
|
|
2397 }
|
|
|
2398 }
|
|
|
2399 }
|
|
|
2400 }
|
|
|
2401
|
|
|
2402 /* If no handler is present now, try to run the debugger,
|
|
|
2403 and if that fails, throw to top level.
|
|
|
2404
|
|
|
2405 #### The only time that no handler is present is during
|
|
|
2406 temacs or perhaps very early in XEmacs. In both cases,
|
|
3025
|
2407 there is no `top-level' catch. (That's why the
|
|
428
|
2408 "bomb-out" hack was added.)
|
|
|
2409
|
|
853
|
2410 [[#### Fix this horrifitude!]]
|
|
|
2411
|
|
|
2412 I don't think this is horrifitude, but just defensive coding. --ben */
|
|
|
2413
|
|
|
2414 signal_call_debugger (conditions, error_symbol, data, Qnil, 0,
|
|
428
|
2415 &stack_trace_displayed,
|
|
|
2416 &debugger_entered);
|
|
|
2417 UNGCPRO;
|
|
853
|
2418 throw_or_bomb_out (Qtop_level, Qt, 1, error_symbol,
|
|
|
2419 data); /* Doesn't return */
|
|
2268
|
2420 RETURN_NOT_REACHED (Qnil);
|
|
428
|
2421 }
|
|
|
2422
|
|
|
2423 /****************** Error functions class 1 ******************/
|
|
|
2424
|
|
|
2425 /* Class 1: General functions that signal an error.
|
|
|
2426 These functions take an error type and a list of associated error
|
|
|
2427 data. */
|
|
|
2428
|
|
853
|
2429 /* No signal_continuable_error_1(); it's called Fsignal(). */
|
|
428
|
2430
|
|
|
2431 /* Signal a non-continuable error. */
|
|
|
2432
|
|
|
2433 DOESNT_RETURN
|
|
563
|
2434 signal_error_1 (Lisp_Object sig, Lisp_Object data)
|
|
428
|
2435 {
|
|
|
2436 for (;;)
|
|
|
2437 Fsignal (sig, data);
|
|
|
2438 }
|
|
853
|
2439
|
|
|
2440 #ifdef ERROR_CHECK_CATCH
|
|
|
2441
|
|
|
2442 void
|
|
|
2443 check_catchlist_sanity (void)
|
|
|
2444 {
|
|
|
2445 #if 0
|
|
|
2446 /* vou me tomar no cu! i just masked andy's missing-unbind
|
|
|
2447 bug! */
|
|
442
|
2448 struct catchtag *c;
|
|
|
2449 int found_error_tag = 0;
|
|
|
2450
|
|
|
2451 for (c = catchlist; c; c = c->next)
|
|
|
2452 {
|
|
|
2453 if (EQ (c->tag, Qunbound_suspended_errors_tag))
|
|
|
2454 {
|
|
|
2455 found_error_tag = 1;
|
|
|
2456 break;
|
|
|
2457 }
|
|
|
2458 }
|
|
|
2459
|
|
|
2460 assert (found_error_tag || NILP (Vcurrent_error_state));
|
|
853
|
2461 #endif /* vou me tomar no cul */
|
|
|
2462 }
|
|
|
2463
|
|
|
2464 void
|
|
|
2465 check_specbind_stack_sanity (void)
|
|
|
2466 {
|
|
|
2467 }
|
|
|
2468
|
|
|
2469 #endif /* ERROR_CHECK_CATCH */
|
|
428
|
2470
|
|
|
2471 /* Signal a non-continuable error or display a warning or do nothing,
|
|
|
2472 according to ERRB. CLASS is the class of warning and should
|
|
|
2473 refer to what sort of operation is being done (e.g. Qtoolbar,
|
|
|
2474 Qresource, etc.). */
|
|
|
2475
|
|
|
2476 void
|
|
1204
|
2477 maybe_signal_error_1 (Lisp_Object sig, Lisp_Object data, Lisp_Object class_,
|
|
578
|
2478 Error_Behavior errb)
|
|
428
|
2479 {
|
|
|
2480 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2481 return;
|
|
793
|
2482 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN))
|
|
1204
|
2483 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data));
|
|
428
|
2484 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
1204
|
2485 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data));
|
|
428
|
2486 else
|
|
|
2487 for (;;)
|
|
|
2488 Fsignal (sig, data);
|
|
|
2489 }
|
|
|
2490
|
|
|
2491 /* Signal a continuable error or display a warning or do nothing,
|
|
|
2492 according to ERRB. */
|
|
|
2493
|
|
|
2494 Lisp_Object
|
|
563
|
2495 maybe_signal_continuable_error_1 (Lisp_Object sig, Lisp_Object data,
|
|
1204
|
2496 Lisp_Object class_, Error_Behavior errb)
|
|
428
|
2497 {
|
|
|
2498 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2499 return Qnil;
|
|
793
|
2500 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN))
|
|
|
2501 {
|
|
1204
|
2502 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data));
|
|
793
|
2503 return Qnil;
|
|
|
2504 }
|
|
428
|
2505 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2506 {
|
|
1204
|
2507 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data));
|
|
428
|
2508 return Qnil;
|
|
|
2509 }
|
|
|
2510 else
|
|
|
2511 return Fsignal (sig, data);
|
|
|
2512 }
|
|
|
2513
|
|
|
2514
|
|
|
2515 /****************** Error functions class 2 ******************/
|
|
|
2516
|
|
563
|
2517 /* Class 2: Signal an error with a string and an associated object.
|
|
|
2518 Normally these functions are used to attach one associated object,
|
|
|
2519 but to attach no objects, specify Qunbound for FROB, and for more
|
|
|
2520 than one object, make a list of the objects with Qunbound as the
|
|
|
2521 first element. (If you have specifically two objects to attach,
|
|
|
2522 consider using the function in class 3 below.) These functions
|
|
|
2523 signal an error of a specified type, whose data is one or more
|
|
|
2524 objects (usually two), a string the related Lisp object(s)
|
|
|
2525 specified as FROB. */
|
|
|
2526
|
|
|
2527 /* Out of REASON and FROB, return a list of elements suitable for passing
|
|
|
2528 to signal_error_1(). */
|
|
|
2529
|
|
|
2530 Lisp_Object
|
|
867
|
2531 build_error_data (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2532 {
|
|
|
2533 if (EQ (frob, Qunbound))
|
|
|
2534 frob = Qnil;
|
|
|
2535 else if (CONSP (frob) && EQ (XCAR (frob), Qunbound))
|
|
|
2536 frob = XCDR (frob);
|
|
|
2537 else
|
|
|
2538 frob = list1 (frob);
|
|
|
2539 if (!reason)
|
|
|
2540 return frob;
|
|
|
2541 else
|
|
771
|
2542 return Fcons (build_msg_string (reason), frob);
|
|
563
|
2543 }
|
|
|
2544
|
|
|
2545 DOESNT_RETURN
|
|
867
|
2546 signal_error (Lisp_Object type, const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2547 {
|
|
|
2548 signal_error_1 (type, build_error_data (reason, frob));
|
|
|
2549 }
|
|
|
2550
|
|
|
2551 void
|
|
867
|
2552 maybe_signal_error (Lisp_Object type, const CIbyte *reason,
|
|
1204
|
2553 Lisp_Object frob, Lisp_Object class_,
|
|
578
|
2554 Error_Behavior errb)
|
|
563
|
2555 {
|
|
|
2556 /* Optimization: */
|
|
|
2557 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2558 return;
|
|
1204
|
2559 maybe_signal_error_1 (type, build_error_data (reason, frob), class_, errb);
|
|
563
|
2560 }
|
|
|
2561
|
|
|
2562 Lisp_Object
|
|
867
|
2563 signal_continuable_error (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2564 Lisp_Object frob)
|
|
|
2565 {
|
|
|
2566 return Fsignal (type, build_error_data (reason, frob));
|
|
|
2567 }
|
|
|
2568
|
|
|
2569 Lisp_Object
|
|
867
|
2570 maybe_signal_continuable_error (Lisp_Object type, const CIbyte *reason,
|
|
1204
|
2571 Lisp_Object frob, Lisp_Object class_,
|
|
578
|
2572 Error_Behavior errb)
|
|
563
|
2573 {
|
|
|
2574 /* Optimization: */
|
|
|
2575 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2576 return Qnil;
|
|
|
2577 return maybe_signal_continuable_error_1 (type,
|
|
|
2578 build_error_data (reason, frob),
|
|
1204
|
2579 class_, errb);
|
|
563
|
2580 }
|
|
|
2581
|
|
|
2582
|
|
|
2583 /****************** Error functions class 3 ******************/
|
|
|
2584
|
|
|
2585 /* Class 3: Signal an error with a string and two associated objects.
|
|
|
2586 These functions signal an error of a specified type, whose data
|
|
|
2587 is three objects, a string and two related Lisp objects.
|
|
|
2588 (The equivalent could be accomplished using the class 2 functions,
|
|
|
2589 but these are more convenient in this particular case.) */
|
|
|
2590
|
|
|
2591 DOESNT_RETURN
|
|
867
|
2592 signal_error_2 (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2593 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2594 {
|
|
771
|
2595 signal_error_1 (type, list3 (build_msg_string (reason), frob0,
|
|
563
|
2596 frob1));
|
|
|
2597 }
|
|
|
2598
|
|
|
2599 void
|
|
867
|
2600 maybe_signal_error_2 (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2601 Lisp_Object frob0, Lisp_Object frob1,
|
|
1204
|
2602 Lisp_Object class_, Error_Behavior errb)
|
|
563
|
2603 {
|
|
|
2604 /* Optimization: */
|
|
|
2605 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2606 return;
|
|
771
|
2607 maybe_signal_error_1 (type, list3 (build_msg_string (reason), frob0,
|
|
1204
|
2608 frob1), class_, errb);
|
|
563
|
2609 }
|
|
|
2610
|
|
|
2611 Lisp_Object
|
|
867
|
2612 signal_continuable_error_2 (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2613 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2614 {
|
|
771
|
2615 return Fsignal (type, list3 (build_msg_string (reason), frob0,
|
|
563
|
2616 frob1));
|
|
|
2617 }
|
|
|
2618
|
|
|
2619 Lisp_Object
|
|
867
|
2620 maybe_signal_continuable_error_2 (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2621 Lisp_Object frob0, Lisp_Object frob1,
|
|
1204
|
2622 Lisp_Object class_, Error_Behavior errb)
|
|
563
|
2623 {
|
|
|
2624 /* Optimization: */
|
|
|
2625 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2626 return Qnil;
|
|
|
2627 return maybe_signal_continuable_error_1
|
|
771
|
2628 (type, list3 (build_msg_string (reason), frob0, frob1),
|
|
1204
|
2629 class_, errb);
|
|
563
|
2630 }
|
|
|
2631
|
|
|
2632
|
|
|
2633 /****************** Error functions class 4 ******************/
|
|
|
2634
|
|
|
2635 /* Class 4: Printf-like functions that signal an error.
|
|
442
|
2636 These functions signal an error of a specified type, whose data
|
|
428
|
2637 is a single string, created using the arguments. */
|
|
|
2638
|
|
|
2639 DOESNT_RETURN
|
|
867
|
2640 signal_ferror (Lisp_Object type, const CIbyte *fmt, ...)
|
|
442
|
2641 {
|
|
|
2642 Lisp_Object obj;
|
|
|
2643 va_list args;
|
|
|
2644
|
|
|
2645 va_start (args, fmt);
|
|
771
|
2646 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
442
|
2647 va_end (args);
|
|
|
2648
|
|
|
2649 /* Fsignal GC-protects its args */
|
|
563
|
2650 signal_error (type, 0, obj);
|
|
442
|
2651 }
|
|
|
2652
|
|
|
2653 void
|
|
1204
|
2654 maybe_signal_ferror (Lisp_Object type, Lisp_Object class_, Error_Behavior errb,
|
|
867
|
2655 const CIbyte *fmt, ...)
|
|
442
|
2656 {
|
|
|
2657 Lisp_Object obj;
|
|
|
2658 va_list args;
|
|
|
2659
|
|
|
2660 /* Optimization: */
|
|
|
2661 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2662 return;
|
|
|
2663
|
|
|
2664 va_start (args, fmt);
|
|
771
|
2665 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
442
|
2666 va_end (args);
|
|
|
2667
|
|
|
2668 /* Fsignal GC-protects its args */
|
|
1204
|
2669 maybe_signal_error (type, 0, obj, class_, errb);
|
|
442
|
2670 }
|
|
|
2671
|
|
|
2672 Lisp_Object
|
|
867
|
2673 signal_continuable_ferror (Lisp_Object type, const CIbyte *fmt, ...)
|
|
428
|
2674 {
|
|
|
2675 Lisp_Object obj;
|
|
|
2676 va_list args;
|
|
|
2677
|
|
|
2678 va_start (args, fmt);
|
|
771
|
2679 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
442
|
2680 va_end (args);
|
|
|
2681
|
|
|
2682 /* Fsignal GC-protects its args */
|
|
|
2683 return Fsignal (type, list1 (obj));
|
|
|
2684 }
|
|
|
2685
|
|
|
2686 Lisp_Object
|
|
1204
|
2687 maybe_signal_continuable_ferror (Lisp_Object type, Lisp_Object class_,
|
|
867
|
2688 Error_Behavior errb, const CIbyte *fmt, ...)
|
|
442
|
2689 {
|
|
|
2690 Lisp_Object obj;
|
|
|
2691 va_list args;
|
|
|
2692
|
|
|
2693 /* Optimization: */
|
|
|
2694 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2695 return Qnil;
|
|
|
2696
|
|
|
2697 va_start (args, fmt);
|
|
771
|
2698 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
442
|
2699 va_end (args);
|
|
|
2700
|
|
|
2701 /* Fsignal GC-protects its args */
|
|
1204
|
2702 return maybe_signal_continuable_error (type, 0, obj, class_, errb);
|
|
442
|
2703 }
|
|
|
2704
|
|
|
2705
|
|
|
2706 /****************** Error functions class 5 ******************/
|
|
|
2707
|
|
563
|
2708 /* Class 5: Printf-like functions that signal an error.
|
|
442
|
2709 These functions signal an error of a specified type, whose data
|
|
563
|
2710 is a one or more objects, a string (created using the arguments)
|
|
|
2711 and additional Lisp objects specified in FROB. (The syntax of FROB
|
|
|
2712 is the same as for class 2.)
|
|
|
2713
|
|
|
2714 There is no need for a class 6 because you can always attach 2
|
|
|
2715 objects using class 5 (for FROB, specify a list with three
|
|
|
2716 elements, the first of which is Qunbound), and these functions are
|
|
|
2717 not commonly used.
|
|
|
2718 */
|
|
442
|
2719
|
|
|
2720 DOESNT_RETURN
|
|
867
|
2721 signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, const CIbyte *fmt,
|
|
563
|
2722 ...)
|
|
442
|
2723 {
|
|
|
2724 Lisp_Object obj;
|
|
|
2725 va_list args;
|
|
|
2726
|
|
|
2727 va_start (args, fmt);
|
|
771
|
2728 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
442
|
2729 va_end (args);
|
|
|
2730
|
|
|
2731 /* Fsignal GC-protects its args */
|
|
563
|
2732 signal_error_1 (type, Fcons (obj, build_error_data (0, frob)));
|
|
442
|
2733 }
|
|
|
2734
|
|
|
2735 void
|
|
563
|
2736 maybe_signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob,
|
|
1204
|
2737 Lisp_Object class_, Error_Behavior errb,
|
|
867
|
2738 const CIbyte *fmt, ...)
|
|
442
|
2739 {
|
|
|
2740 Lisp_Object obj;
|
|
|
2741 va_list args;
|
|
|
2742
|
|
|
2743 /* Optimization: */
|
|
|
2744 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2745 return;
|
|
|
2746
|
|
|
2747 va_start (args, fmt);
|
|
771
|
2748 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
428
|
2749 va_end (args);
|
|
|
2750
|
|
|
2751 /* Fsignal GC-protects its args */
|
|
1204
|
2752 maybe_signal_error_1 (type, Fcons (obj, build_error_data (0, frob)), class_,
|
|
563
|
2753 errb);
|
|
428
|
2754 }
|
|
|
2755
|
|
|
2756 Lisp_Object
|
|
563
|
2757 signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob,
|
|
867
|
2758 const CIbyte *fmt, ...)
|
|
428
|
2759 {
|
|
|
2760 Lisp_Object obj;
|
|
|
2761 va_list args;
|
|
|
2762
|
|
|
2763 va_start (args, fmt);
|
|
771
|
2764 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
428
|
2765 va_end (args);
|
|
|
2766
|
|
|
2767 /* Fsignal GC-protects its args */
|
|
563
|
2768 return Fsignal (type, Fcons (obj, build_error_data (0, frob)));
|
|
428
|
2769 }
|
|
|
2770
|
|
|
2771 Lisp_Object
|
|
563
|
2772 maybe_signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob,
|
|
1204
|
2773 Lisp_Object class_,
|
|
578
|
2774 Error_Behavior errb,
|
|
867
|
2775 const CIbyte *fmt, ...)
|
|
428
|
2776 {
|
|
|
2777 Lisp_Object obj;
|
|
|
2778 va_list args;
|
|
|
2779
|
|
|
2780 /* Optimization: */
|
|
|
2781 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2782 return Qnil;
|
|
|
2783
|
|
|
2784 va_start (args, fmt);
|
|
771
|
2785 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
428
|
2786 va_end (args);
|
|
|
2787
|
|
|
2788 /* Fsignal GC-protects its args */
|
|
563
|
2789 return maybe_signal_continuable_error_1 (type,
|
|
|
2790 Fcons (obj,
|
|
|
2791 build_error_data (0, frob)),
|
|
1204
|
2792 class_, errb);
|
|
428
|
2793 }
|
|
|
2794
|
|
|
2795
|
|
|
2796 /* This is what the QUIT macro calls to signal a quit */
|
|
|
2797 void
|
|
|
2798 signal_quit (void)
|
|
|
2799 {
|
|
853
|
2800 /* This function cannot GC. GC is prohibited because most callers do
|
|
|
2801 not expect GC occurring in QUIT. Remove this if/when that gets fixed.
|
|
|
2802 --ben */
|
|
|
2803
|
|
|
2804 int count;
|
|
|
2805
|
|
428
|
2806 if (EQ (Vquit_flag, Qcritical))
|
|
|
2807 debug_on_quit |= 2; /* set critical bit. */
|
|
|
2808 Vquit_flag = Qnil;
|
|
853
|
2809 count = begin_gc_forbidden ();
|
|
428
|
2810 /* note that this is continuable. */
|
|
|
2811 Fsignal (Qquit, Qnil);
|
|
853
|
2812 unbind_to (count);
|
|
428
|
2813 }
|
|
|
2814
|
|
|
2815
|
|
563
|
2816 /************************ convenience error functions ***********************/
|
|
|
2817
|
|
436
|
2818 Lisp_Object
|
|
428
|
2819 signal_void_function_error (Lisp_Object function)
|
|
|
2820 {
|
|
436
|
2821 return Fsignal (Qvoid_function, list1 (function));
|
|
428
|
2822 }
|
|
|
2823
|
|
436
|
2824 Lisp_Object
|
|
428
|
2825 signal_invalid_function_error (Lisp_Object function)
|
|
|
2826 {
|
|
436
|
2827 return Fsignal (Qinvalid_function, list1 (function));
|
|
428
|
2828 }
|
|
|
2829
|
|
436
|
2830 Lisp_Object
|
|
428
|
2831 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs)
|
|
|
2832 {
|
|
436
|
2833 return Fsignal (Qwrong_number_of_arguments,
|
|
|
2834 list2 (function, make_int (nargs)));
|
|
428
|
2835 }
|
|
|
2836
|
|
|
2837 /* Used in list traversal macros for efficiency. */
|
|
436
|
2838 DOESNT_RETURN
|
|
428
|
2839 signal_malformed_list_error (Lisp_Object list)
|
|
|
2840 {
|
|
563
|
2841 signal_error (Qmalformed_list, 0, list);
|
|
428
|
2842 }
|
|
|
2843
|
|
436
|
2844 DOESNT_RETURN
|
|
428
|
2845 signal_malformed_property_list_error (Lisp_Object list)
|
|
|
2846 {
|
|
563
|
2847 signal_error (Qmalformed_property_list, 0, list);
|
|
428
|
2848 }
|
|
|
2849
|
|
436
|
2850 DOESNT_RETURN
|
|
428
|
2851 signal_circular_list_error (Lisp_Object list)
|
|
|
2852 {
|
|
563
|
2853 signal_error (Qcircular_list, 0, list);
|
|
428
|
2854 }
|
|
|
2855
|
|
436
|
2856 DOESNT_RETURN
|
|
428
|
2857 signal_circular_property_list_error (Lisp_Object list)
|
|
|
2858 {
|
|
563
|
2859 signal_error (Qcircular_property_list, 0, list);
|
|
428
|
2860 }
|
|
442
|
2861
|
|
2267
|
2862 /* Called from within emacs_doprnt_1, so REASON is not formatted. */
|
|
442
|
2863 DOESNT_RETURN
|
|
867
|
2864 syntax_error (const CIbyte *reason, Lisp_Object frob)
|
|
442
|
2865 {
|
|
563
|
2866 signal_error (Qsyntax_error, reason, frob);
|
|
442
|
2867 }
|
|
|
2868
|
|
|
2869 DOESNT_RETURN
|
|
867
|
2870 syntax_error_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
442
|
2871 {
|
|
563
|
2872 signal_error_2 (Qsyntax_error, reason, frob1, frob2);
|
|
|
2873 }
|
|
|
2874
|
|
|
2875 void
|
|
867
|
2876 maybe_syntax_error (const CIbyte *reason, Lisp_Object frob,
|
|
1204
|
2877 Lisp_Object class_, Error_Behavior errb)
|
|
|
2878 {
|
|
|
2879 maybe_signal_error (Qsyntax_error, reason, frob, class_, errb);
|
|
563
|
2880 }
|
|
|
2881
|
|
|
2882 DOESNT_RETURN
|
|
867
|
2883 sferror (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2884 {
|
|
|
2885 signal_error (Qstructure_formation_error, reason, frob);
|
|
|
2886 }
|
|
|
2887
|
|
|
2888 DOESNT_RETURN
|
|
867
|
2889 sferror_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
563
|
2890 {
|
|
|
2891 signal_error_2 (Qstructure_formation_error, reason, frob1, frob2);
|
|
|
2892 }
|
|
|
2893
|
|
|
2894 void
|
|
867
|
2895 maybe_sferror (const CIbyte *reason, Lisp_Object frob,
|
|
1204
|
2896 Lisp_Object class_, Error_Behavior errb)
|
|
|
2897 {
|
|
|
2898 maybe_signal_error (Qstructure_formation_error, reason, frob, class_, errb);
|
|
442
|
2899 }
|
|
|
2900
|
|
|
2901 DOESNT_RETURN
|
|
867
|
2902 invalid_argument (const CIbyte *reason, Lisp_Object frob)
|
|
442
|
2903 {
|
|
563
|
2904 signal_error (Qinvalid_argument, reason, frob);
|
|
442
|
2905 }
|
|
|
2906
|
|
|
2907 DOESNT_RETURN
|
|
867
|
2908 invalid_argument_2 (const CIbyte *reason, Lisp_Object frob1,
|
|
609
|
2909 Lisp_Object frob2)
|
|
442
|
2910 {
|
|
563
|
2911 signal_error_2 (Qinvalid_argument, reason, frob1, frob2);
|
|
|
2912 }
|
|
|
2913
|
|
|
2914 void
|
|
867
|
2915 maybe_invalid_argument (const CIbyte *reason, Lisp_Object frob,
|
|
1204
|
2916 Lisp_Object class_, Error_Behavior errb)
|
|
|
2917 {
|
|
|
2918 maybe_signal_error (Qinvalid_argument, reason, frob, class_, errb);
|
|
563
|
2919 }
|
|
|
2920
|
|
|
2921 DOESNT_RETURN
|
|
867
|
2922 invalid_constant (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2923 {
|
|
|
2924 signal_error (Qinvalid_constant, reason, frob);
|
|
|
2925 }
|
|
|
2926
|
|
|
2927 DOESNT_RETURN
|
|
867
|
2928 invalid_constant_2 (const CIbyte *reason, Lisp_Object frob1,
|
|
609
|
2929 Lisp_Object frob2)
|
|
563
|
2930 {
|
|
|
2931 signal_error_2 (Qinvalid_constant, reason, frob1, frob2);
|
|
|
2932 }
|
|
|
2933
|
|
|
2934 void
|
|
867
|
2935 maybe_invalid_constant (const CIbyte *reason, Lisp_Object frob,
|
|
1204
|
2936 Lisp_Object class_, Error_Behavior errb)
|
|
|
2937 {
|
|
|
2938 maybe_signal_error (Qinvalid_constant, reason, frob, class_, errb);
|
|
442
|
2939 }
|
|
|
2940
|
|
|
2941 DOESNT_RETURN
|
|
867
|
2942 invalid_operation (const CIbyte *reason, Lisp_Object frob)
|
|
442
|
2943 {
|
|
563
|
2944 signal_error (Qinvalid_operation, reason, frob);
|
|
442
|
2945 }
|
|
|
2946
|
|
|
2947 DOESNT_RETURN
|
|
867
|
2948 invalid_operation_2 (const CIbyte *reason, Lisp_Object frob1,
|
|
609
|
2949 Lisp_Object frob2)
|
|
442
|
2950 {
|
|
563
|
2951 signal_error_2 (Qinvalid_operation, reason, frob1, frob2);
|
|
|
2952 }
|
|
|
2953
|
|
|
2954 void
|
|
867
|
2955 maybe_invalid_operation (const CIbyte *reason, Lisp_Object frob,
|
|
1204
|
2956 Lisp_Object class_, Error_Behavior errb)
|
|
|
2957 {
|
|
|
2958 maybe_signal_error (Qinvalid_operation, reason, frob, class_, errb);
|
|
442
|
2959 }
|
|
|
2960
|
|
|
2961 DOESNT_RETURN
|
|
867
|
2962 invalid_change (const CIbyte *reason, Lisp_Object frob)
|
|
442
|
2963 {
|
|
563
|
2964 signal_error (Qinvalid_change, reason, frob);
|
|
442
|
2965 }
|
|
|
2966
|
|
|
2967 DOESNT_RETURN
|
|
867
|
2968 invalid_change_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
442
|
2969 {
|
|
563
|
2970 signal_error_2 (Qinvalid_change, reason, frob1, frob2);
|
|
|
2971 }
|
|
|
2972
|
|
|
2973 void
|
|
867
|
2974 maybe_invalid_change (const CIbyte *reason, Lisp_Object frob,
|
|
1204
|
2975 Lisp_Object class_, Error_Behavior errb)
|
|
|
2976 {
|
|
|
2977 maybe_signal_error (Qinvalid_change, reason, frob, class_, errb);
|
|
563
|
2978 }
|
|
|
2979
|
|
|
2980 DOESNT_RETURN
|
|
867
|
2981 invalid_state (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2982 {
|
|
|
2983 signal_error (Qinvalid_state, reason, frob);
|
|
|
2984 }
|
|
|
2985
|
|
|
2986 DOESNT_RETURN
|
|
867
|
2987 invalid_state_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
563
|
2988 {
|
|
|
2989 signal_error_2 (Qinvalid_state, reason, frob1, frob2);
|
|
|
2990 }
|
|
|
2991
|
|
|
2992 void
|
|
867
|
2993 maybe_invalid_state (const CIbyte *reason, Lisp_Object frob,
|
|
1204
|
2994 Lisp_Object class_, Error_Behavior errb)
|
|
|
2995 {
|
|
|
2996 maybe_signal_error (Qinvalid_state, reason, frob, class_, errb);
|
|
563
|
2997 }
|
|
|
2998
|
|
|
2999 DOESNT_RETURN
|
|
867
|
3000 wtaerror (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
3001 {
|
|
|
3002 signal_error (Qwrong_type_argument, reason, frob);
|
|
|
3003 }
|
|
|
3004
|
|
|
3005 DOESNT_RETURN
|
|
867
|
3006 stack_overflow (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
3007 {
|
|
|
3008 signal_error (Qstack_overflow, reason, frob);
|
|
|
3009 }
|
|
|
3010
|
|
|
3011 DOESNT_RETURN
|
|
867
|
3012 out_of_memory (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
3013 {
|
|
|
3014 signal_error (Qout_of_memory, reason, frob);
|
|
|
3015 }
|
|
|
3016
|
|
|
3017 DOESNT_RETURN
|
|
867
|
3018 printing_unreadable_object (const CIbyte *fmt, ...)
|
|
563
|
3019 {
|
|
|
3020 Lisp_Object obj;
|
|
|
3021 va_list args;
|
|
|
3022
|
|
|
3023 va_start (args, fmt);
|
|
771
|
3024 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
563
|
3025 va_end (args);
|
|
|
3026
|
|
|
3027 /* Fsignal GC-protects its args */
|
|
|
3028 signal_error (Qprinting_unreadable_object, 0, obj);
|
|
442
|
3029 }
|
|
|
3030
|
|
428
|
3031
|
|
|
3032 /************************************************************************/
|
|
|
3033 /* User commands */
|
|
|
3034 /************************************************************************/
|
|
|
3035
|
|
|
3036 DEFUN ("commandp", Fcommandp, 1, 1, 0, /*
|
|
|
3037 Return t if FUNCTION makes provisions for interactive calling.
|
|
|
3038 This means it contains a description for how to read arguments to give it.
|
|
|
3039 The value is nil for an invalid function or a symbol with no function
|
|
|
3040 definition.
|
|
|
3041
|
|
|
3042 Interactively callable functions include
|
|
|
3043
|
|
|
3044 -- strings and vectors (treated as keyboard macros)
|
|
|
3045 -- lambda-expressions that contain a top-level call to `interactive'
|
|
|
3046 -- autoload definitions made by `autoload' with non-nil fourth argument
|
|
|
3047 (i.e. the interactive flag)
|
|
|
3048 -- compiled-function objects with a non-nil `compiled-function-interactive'
|
|
|
3049 value
|
|
|
3050 -- subrs (built-in functions) that are interactively callable
|
|
|
3051
|
|
|
3052 Also, a symbol satisfies `commandp' if its function definition does so.
|
|
|
3053 */
|
|
|
3054 (function))
|
|
|
3055 {
|
|
|
3056 Lisp_Object fun = indirect_function (function, 0);
|
|
|
3057
|
|
|
3058 if (COMPILED_FUNCTIONP (fun))
|
|
|
3059 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil;
|
|
|
3060
|
|
|
3061 /* Lists may represent commands. */
|
|
|
3062 if (CONSP (fun))
|
|
|
3063 {
|
|
|
3064 Lisp_Object funcar = XCAR (fun);
|
|
|
3065 if (EQ (funcar, Qlambda))
|
|
|
3066 return Fassq (Qinteractive, Fcdr (Fcdr (fun)));
|
|
|
3067 if (EQ (funcar, Qautoload))
|
|
|
3068 return Fcar (Fcdr (Fcdr (Fcdr (fun))));
|
|
|
3069 else
|
|
|
3070 return Qnil;
|
|
|
3071 }
|
|
|
3072
|
|
|
3073 /* Emacs primitives are interactive if their DEFUN specifies an
|
|
|
3074 interactive spec. */
|
|
|
3075 if (SUBRP (fun))
|
|
|
3076 return XSUBR (fun)->prompt ? Qt : Qnil;
|
|
|
3077
|
|
|
3078 /* Strings and vectors are keyboard macros. */
|
|
|
3079 if (VECTORP (fun) || STRINGP (fun))
|
|
|
3080 return Qt;
|
|
|
3081
|
|
|
3082 /* Everything else (including Qunbound) is not a command. */
|
|
|
3083 return Qnil;
|
|
|
3084 }
|
|
|
3085
|
|
|
3086 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /*
|
|
|
3087 Execute CMD as an editor command.
|
|
|
3088 CMD must be an object that satisfies the `commandp' predicate.
|
|
|
3089 Optional second arg RECORD-FLAG is as in `call-interactively'.
|
|
|
3090 The argument KEYS specifies the value to use instead of (this-command-keys)
|
|
|
3091 when reading the arguments.
|
|
|
3092 */
|
|
444
|
3093 (cmd, record_flag, keys))
|
|
428
|
3094 {
|
|
|
3095 /* This function can GC */
|
|
|
3096 Lisp_Object prefixarg;
|
|
|
3097 Lisp_Object final = cmd;
|
|
|
3098 struct backtrace backtrace;
|
|
|
3099 struct console *con = XCONSOLE (Vselected_console);
|
|
|
3100
|
|
|
3101 prefixarg = con->prefix_arg;
|
|
|
3102 con->prefix_arg = Qnil;
|
|
|
3103 Vcurrent_prefix_arg = prefixarg;
|
|
|
3104 debug_on_next_call = 0; /* #### from FSFmacs; correct? */
|
|
|
3105
|
|
|
3106 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil)))
|
|
733
|
3107 return run_hook (Qdisabled_command_hook);
|
|
428
|
3108
|
|
|
3109 for (;;)
|
|
|
3110 {
|
|
|
3111 final = indirect_function (cmd, 1);
|
|
|
3112 if (CONSP (final) && EQ (Fcar (final), Qautoload))
|
|
970
|
3113 {
|
|
|
3114 /* do_autoload GCPROs both arguments */
|
|
|
3115 do_autoload (final, cmd);
|
|
|
3116 }
|
|
428
|
3117 else
|
|
|
3118 break;
|
|
|
3119 }
|
|
|
3120
|
|
|
3121 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final))
|
|
|
3122 {
|
|
|
3123 backtrace.function = &Qcall_interactively;
|
|
|
3124 backtrace.args = &cmd;
|
|
|
3125 backtrace.nargs = 1;
|
|
|
3126 backtrace.evalargs = 0;
|
|
1292
|
3127 backtrace.pdlcount = specpdl_depth ();
|
|
428
|
3128 backtrace.debug_on_exit = 0;
|
|
1292
|
3129 backtrace.function_being_called = 0;
|
|
428
|
3130 PUSH_BACKTRACE (backtrace);
|
|
|
3131
|
|
1292
|
3132 PROFILE_ENTER_FUNCTION ();
|
|
444
|
3133 final = Fcall_interactively (cmd, record_flag, keys);
|
|
1292
|
3134 PROFILE_EXIT_FUNCTION ();
|
|
428
|
3135
|
|
|
3136 POP_BACKTRACE (backtrace);
|
|
|
3137 return final;
|
|
|
3138 }
|
|
|
3139 else if (STRINGP (final) || VECTORP (final))
|
|
|
3140 {
|
|
|
3141 return Fexecute_kbd_macro (final, prefixarg);
|
|
|
3142 }
|
|
|
3143 else
|
|
|
3144 {
|
|
|
3145 Fsignal (Qwrong_type_argument,
|
|
|
3146 Fcons (Qcommandp,
|
|
|
3147 (EQ (cmd, final)
|
|
|
3148 ? list1 (cmd)
|
|
|
3149 : list2 (cmd, final))));
|
|
|
3150 return Qnil;
|
|
|
3151 }
|
|
|
3152 }
|
|
|
3153
|
|
|
3154 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /*
|
|
|
3155 Return t if function in which this appears was called interactively.
|
|
|
3156 This means that the function was called with call-interactively (which
|
|
|
3157 includes being called as the binding of a key)
|
|
|
3158 and input is currently coming from the keyboard (not in keyboard macro).
|
|
|
3159 */
|
|
|
3160 ())
|
|
|
3161 {
|
|
|
3162 REGISTER struct backtrace *btp;
|
|
|
3163 REGISTER Lisp_Object fun;
|
|
|
3164
|
|
|
3165 if (!INTERACTIVE)
|
|
|
3166 return Qnil;
|
|
|
3167
|
|
|
3168 /* Unless the object was compiled, skip the frame of interactive-p itself
|
|
|
3169 (if interpreted) or the frame of byte-code (if called from a compiled
|
|
|
3170 function). Note that *btp->function may be a symbol pointing at a
|
|
|
3171 compiled function. */
|
|
|
3172 btp = backtrace_list;
|
|
|
3173
|
|
|
3174 #if 0 /* FSFmacs */
|
|
|
3175
|
|
|
3176 /* #### FSFmacs does the following instead. I can't figure
|
|
|
3177 out which one is more correct. */
|
|
|
3178 /* If this isn't a byte-compiled function, there may be a frame at
|
|
|
3179 the top for Finteractive_p itself. If so, skip it. */
|
|
|
3180 fun = Findirect_function (*btp->function);
|
|
|
3181 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p)
|
|
|
3182 btp = btp->next;
|
|
|
3183
|
|
|
3184 /* If we're running an Emacs 18-style byte-compiled function, there
|
|
|
3185 may be a frame for Fbyte_code. Now, given the strictest
|
|
|
3186 definition, this function isn't really being called
|
|
|
3187 interactively, but because that's the way Emacs 18 always builds
|
|
|
3188 byte-compiled functions, we'll accept it for now. */
|
|
|
3189 if (EQ (*btp->function, Qbyte_code))
|
|
|
3190 btp = btp->next;
|
|
|
3191
|
|
|
3192 /* If this isn't a byte-compiled function, then we may now be
|
|
|
3193 looking at several frames for special forms. Skip past them. */
|
|
|
3194 while (btp &&
|
|
|
3195 btp->nargs == UNEVALLED)
|
|
|
3196 btp = btp->next;
|
|
|
3197
|
|
|
3198 #else
|
|
|
3199
|
|
|
3200 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function))))
|
|
|
3201 btp = btp->next;
|
|
|
3202 for (;
|
|
|
3203 btp && (btp->nargs == UNEVALLED
|
|
|
3204 || EQ (*btp->function, Qbyte_code));
|
|
|
3205 btp = btp->next)
|
|
|
3206 {}
|
|
|
3207 /* btp now points at the frame of the innermost function
|
|
|
3208 that DOES eval its args.
|
|
|
3209 If it is a built-in function (such as load or eval-region)
|
|
|
3210 return nil. */
|
|
|
3211 /* Beats me why this is necessary, but it is */
|
|
|
3212 if (btp && EQ (*btp->function, Qcall_interactively))
|
|
|
3213 return Qt;
|
|
|
3214
|
|
|
3215 #endif
|
|
|
3216
|
|
|
3217 fun = Findirect_function (*btp->function);
|
|
|
3218 if (SUBRP (fun))
|
|
|
3219 return Qnil;
|
|
|
3220 /* btp points to the frame of a Lisp function that called interactive-p.
|
|
|
3221 Return t if that function was called interactively. */
|
|
|
3222 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively))
|
|
|
3223 return Qt;
|
|
|
3224 return Qnil;
|
|
|
3225 }
|
|
|
3226
|
|
|
3227
|
|
|
3228 /************************************************************************/
|
|
|
3229 /* Autoloading */
|
|
|
3230 /************************************************************************/
|
|
|
3231
|
|
|
3232 DEFUN ("autoload", Fautoload, 2, 5, 0, /*
|
|
444
|
3233 Define FUNCTION to autoload from FILENAME.
|
|
|
3234 FUNCTION is a symbol; FILENAME is a file name string to pass to `load'.
|
|
|
3235 The remaining optional arguments provide additional info about the
|
|
|
3236 real definition.
|
|
|
3237 DOCSTRING is documentation for FUNCTION.
|
|
|
3238 INTERACTIVE, if non-nil, says FUNCTION can be called interactively.
|
|
|
3239 TYPE indicates the type of the object:
|
|
428
|
3240 nil or omitted says FUNCTION is a function,
|
|
|
3241 `keymap' says FUNCTION is really a keymap, and
|
|
|
3242 `macro' or t says FUNCTION is really a macro.
|
|
444
|
3243 If FUNCTION already has a non-void function definition that is not an
|
|
|
3244 autoload object, this function does nothing and returns nil.
|
|
428
|
3245 */
|
|
444
|
3246 (function, filename, docstring, interactive, type))
|
|
428
|
3247 {
|
|
|
3248 /* This function can GC */
|
|
|
3249 CHECK_SYMBOL (function);
|
|
444
|
3250 CHECK_STRING (filename);
|
|
428
|
3251
|
|
|
3252 /* If function is defined and not as an autoload, don't override */
|
|
|
3253 {
|
|
|
3254 Lisp_Object f = XSYMBOL (function)->function;
|
|
|
3255 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload)))
|
|
|
3256 return Qnil;
|
|
|
3257 }
|
|
|
3258
|
|
|
3259 if (purify_flag)
|
|
|
3260 {
|
|
|
3261 /* Attempt to avoid consing identical (string=) pure strings. */
|
|
444
|
3262 filename = Fsymbol_name (Fintern (filename, Qnil));
|
|
428
|
3263 }
|
|
440
|
3264
|
|
444
|
3265 return Ffset (function, Fcons (Qautoload, list4 (filename,
|
|
428
|
3266 docstring,
|
|
|
3267 interactive,
|
|
|
3268 type)));
|
|
|
3269 }
|
|
|
3270
|
|
|
3271 Lisp_Object
|
|
|
3272 un_autoload (Lisp_Object oldqueue)
|
|
|
3273 {
|
|
|
3274 /* This function can GC */
|
|
|
3275 REGISTER Lisp_Object queue, first, second;
|
|
|
3276
|
|
|
3277 /* Queue to unwind is current value of Vautoload_queue.
|
|
|
3278 oldqueue is the shadowed value to leave in Vautoload_queue. */
|
|
|
3279 queue = Vautoload_queue;
|
|
|
3280 Vautoload_queue = oldqueue;
|
|
|
3281 while (CONSP (queue))
|
|
|
3282 {
|
|
|
3283 first = XCAR (queue);
|
|
|
3284 second = Fcdr (first);
|
|
|
3285 first = Fcar (first);
|
|
|
3286 if (NILP (second))
|
|
|
3287 Vfeatures = first;
|
|
|
3288 else
|
|
|
3289 Ffset (first, second);
|
|
|
3290 queue = Fcdr (queue);
|
|
|
3291 }
|
|
|
3292 return Qnil;
|
|
|
3293 }
|
|
|
3294
|
|
970
|
3295 /* do_autoload GCPROs both arguments */
|
|
428
|
3296 void
|
|
|
3297 do_autoload (Lisp_Object fundef,
|
|
|
3298 Lisp_Object funname)
|
|
|
3299 {
|
|
|
3300 /* This function can GC */
|
|
|
3301 int speccount = specpdl_depth();
|
|
|
3302 Lisp_Object fun = funname;
|
|
970
|
3303 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
428
|
3304
|
|
|
3305 CHECK_SYMBOL (funname);
|
|
970
|
3306 GCPRO3 (fundef, funname, fun);
|
|
428
|
3307
|
|
|
3308 /* Value saved here is to be restored into Vautoload_queue */
|
|
|
3309 record_unwind_protect (un_autoload, Vautoload_queue);
|
|
|
3310 Vautoload_queue = Qt;
|
|
|
3311 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil);
|
|
|
3312
|
|
|
3313 {
|
|
|
3314 Lisp_Object queue;
|
|
|
3315
|
|
|
3316 /* Save the old autoloads, in case we ever do an unload. */
|
|
|
3317 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue))
|
|
|
3318 {
|
|
|
3319 Lisp_Object first = XCAR (queue);
|
|
|
3320 Lisp_Object second = Fcdr (first);
|
|
|
3321
|
|
|
3322 first = Fcar (first);
|
|
|
3323
|
|
|
3324 /* Note: This test is subtle. The cdr of an autoload-queue entry
|
|
|
3325 may be an atom if the autoload entry was generated by a defalias
|
|
|
3326 or fset. */
|
|
|
3327 if (CONSP (second))
|
|
|
3328 Fput (first, Qautoload, (XCDR (second)));
|
|
|
3329 }
|
|
|
3330 }
|
|
|
3331
|
|
|
3332 /* Once loading finishes, don't undo it. */
|
|
|
3333 Vautoload_queue = Qt;
|
|
771
|
3334 unbind_to (speccount);
|
|
428
|
3335
|
|
|
3336 fun = indirect_function (fun, 0);
|
|
|
3337
|
|
|
3338 #if 0 /* FSFmacs */
|
|
|
3339 if (!NILP (Fequal (fun, fundef)))
|
|
|
3340 #else
|
|
|
3341 if (UNBOUNDP (fun)
|
|
|
3342 || (CONSP (fun)
|
|
|
3343 && EQ (XCAR (fun), Qautoload)))
|
|
|
3344 #endif
|
|
563
|
3345 invalid_state ("Autoloading failed to define function", funname);
|
|
428
|
3346 UNGCPRO;
|
|
|
3347 }
|
|
|
3348
|
|
|
3349
|
|
|
3350 /************************************************************************/
|
|
|
3351 /* eval, funcall, apply */
|
|
|
3352 /************************************************************************/
|
|
|
3353
|
|
814
|
3354 /* NOTE: If you are hearing the endless complaint that function calls in
|
|
|
3355 elisp are extremely slow, it just isn't true any more! The stuff below
|
|
|
3356 -- in particular, the calling of subrs and compiled functions, the most
|
|
|
3357 common cases -- has been highly optimized. There isn't a whole lot left
|
|
|
3358 to do to squeeze more speed out except by switching to lexical
|
|
|
3359 variables, which would eliminate the specbind loop. (But the real gain
|
|
|
3360 from lexical variables would come from better optimization -- with
|
|
|
3361 dynamic binding, you have the constant problem that any function call
|
|
|
3362 that you haven't explicitly proven to be side-effect-free might
|
|
|
3363 potentially side effect your local variables, which makes optimization
|
|
|
3364 extremely difficult when there are function calls anywhere in a chunk of
|
|
|
3365 code to be optimized. Even worse, you don't know that *your* local
|
|
|
3366 variables aren't side-effecting an outer function's local variables, so
|
|
|
3367 it's impossible to optimize away almost *any* variable assignment.) */
|
|
|
3368
|
|
428
|
3369 static Lisp_Object funcall_lambda (Lisp_Object fun,
|
|
442
|
3370 int nargs, Lisp_Object args[]);
|
|
428
|
3371 static int in_warnings;
|
|
|
3372
|
|
|
3373
|
|
814
|
3374 void handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f,
|
|
|
3375 int nargs,
|
|
|
3376 Lisp_Object args[]);
|
|
|
3377
|
|
|
3378 /* The theory behind making this a separate function is to shrink
|
|
|
3379 funcall_compiled_function() so as to increase the likelihood of a cache
|
|
|
3380 hit in the L1 cache -- &rest processing is not going to be fast anyway.
|
|
|
3381 The idea is the same as with execute_rare_opcode() in bytecode.c. We
|
|
|
3382 make this non-static to ensure the compiler doesn't inline it. */
|
|
|
3383
|
|
|
3384 void
|
|
|
3385 handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, int nargs,
|
|
|
3386 Lisp_Object args[])
|
|
|
3387 {
|
|
|
3388 REGISTER int i = 0;
|
|
|
3389 int max_non_rest_args = f->args_in_array - 1;
|
|
|
3390 int bindargs = min (nargs, max_non_rest_args);
|
|
|
3391
|
|
|
3392 for (i = 0; i < bindargs; i++)
|
|
3092
|
3393 #ifdef NEW_GC
|
|
|
3394 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i],
|
|
|
3395 args[i]);
|
|
|
3396 #else /* not NEW_GC */
|
|
814
|
3397 SPECBIND_FAST_UNSAFE (f->args[i], args[i]);
|
|
3092
|
3398 #endif /* not NEW_GC */
|
|
814
|
3399 for (i = bindargs; i < max_non_rest_args; i++)
|
|
3092
|
3400 #ifdef NEW_GC
|
|
|
3401 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i],
|
|
|
3402 Qnil);
|
|
|
3403 #else /* not NEW_GC */
|
|
814
|
3404 SPECBIND_FAST_UNSAFE (f->args[i], Qnil);
|
|
3092
|
3405 #endif /* not NEW_GC */
|
|
|
3406 #ifdef NEW_GC
|
|
|
3407 SPECBIND_FAST_UNSAFE
|
|
|
3408 (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[max_non_rest_args],
|
|
|
3409 nargs > max_non_rest_args ?
|
|
|
3410 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) :
|
|
|
3411 Qnil);
|
|
|
3412 #else /* not NEW_GC */
|
|
814
|
3413 SPECBIND_FAST_UNSAFE
|
|
|
3414 (f->args[max_non_rest_args],
|
|
|
3415 nargs > max_non_rest_args ?
|
|
|
3416 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) :
|
|
|
3417 Qnil);
|
|
3092
|
3418 #endif /* not NEW_GC */
|
|
814
|
3419 }
|
|
|
3420
|
|
|
3421 /* Apply compiled-function object FUN to the NARGS evaluated arguments
|
|
|
3422 in ARGS, and return the result of evaluation. */
|
|
|
3423 inline static Lisp_Object
|
|
|
3424 funcall_compiled_function (Lisp_Object fun, int nargs, Lisp_Object args[])
|
|
|
3425 {
|
|
|
3426 /* This function can GC */
|
|
|
3427 int speccount = specpdl_depth();
|
|
|
3428 REGISTER int i = 0;
|
|
|
3429 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (fun);
|
|
|
3430
|
|
|
3431 if (!OPAQUEP (f->instructions))
|
|
|
3432 /* Lazily munge the instructions into a more efficient form */
|
|
|
3433 optimize_compiled_function (fun);
|
|
|
3434
|
|
|
3435 /* optimize_compiled_function() guaranteed that f->specpdl_depth is
|
|
|
3436 the required space on the specbinding stack for binding the args
|
|
|
3437 and local variables of fun. So just reserve it once. */
|
|
|
3438 SPECPDL_RESERVE (f->specpdl_depth);
|
|
|
3439
|
|
|
3440 if (nargs == f->max_args) /* Optimize for the common case -- no unspecified
|
|
|
3441 optional arguments. */
|
|
|
3442 {
|
|
|
3443 #if 1
|
|
|
3444 for (i = 0; i < nargs; i++)
|
|
3092
|
3445 #ifdef NEW_GC
|
|
|
3446 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i],
|
|
|
3447 args[i]);
|
|
|
3448 #else /* not NEW_GC */
|
|
814
|
3449 SPECBIND_FAST_UNSAFE (f->args[i], args[i]);
|
|
3092
|
3450 #endif /* not NEW_GC */
|
|
814
|
3451 #else
|
|
|
3452 /* Here's an alternate way to write the loop that tries to further
|
|
|
3453 optimize funcalls for functions with few arguments by partially
|
|
|
3454 unrolling the loop. It's not clear whether this is a win since it
|
|
|
3455 increases the size of the function and the possibility of L1 cache
|
|
|
3456 misses. (Microsoft VC++ 6 with /O2 /G5 generates 0x90 == 144 bytes
|
|
|
3457 per SPECBIND_FAST_UNSAFE().) Tests under VC++ 6, running the byte
|
|
|
3458 compiler repeatedly and looking at the total time, show very
|
|
|
3459 little difference between the simple loop above, the unrolled code
|
|
|
3460 below, and a "partly unrolled" solution with only cases 0-2 below
|
|
|
3461 instead of 0-4. Therefore, I'm keeping it at the simple loop
|
|
|
3462 because it's smaller. */
|
|
|
3463 switch (nargs)
|
|
|
3464 {
|
|
|
3465 default:
|
|
|
3466 for (i = nargs - 1; i >= 4; i--)
|
|
|
3467 SPECBIND_FAST_UNSAFE (f->args[i], args[i]);
|
|
|
3468 case 4: SPECBIND_FAST_UNSAFE (f->args[3], args[3]);
|
|
|
3469 case 3: SPECBIND_FAST_UNSAFE (f->args[2], args[2]);
|
|
|
3470 case 2: SPECBIND_FAST_UNSAFE (f->args[1], args[1]);
|
|
|
3471 case 1: SPECBIND_FAST_UNSAFE (f->args[0], args[0]);
|
|
|
3472 case 0: break;
|
|
|
3473 }
|
|
|
3474 #endif
|
|
|
3475 }
|
|
|
3476 else if (nargs < f->min_args)
|
|
|
3477 goto wrong_number_of_arguments;
|
|
|
3478 else if (nargs < f->max_args)
|
|
|
3479 {
|
|
|
3480 for (i = 0; i < nargs; i++)
|
|
3092
|
3481 #ifdef NEW_GC
|
|
|
3482 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i],
|
|
|
3483 args[i]);
|
|
|
3484 #else /* not NEW_GC */
|
|
814
|
3485 SPECBIND_FAST_UNSAFE (f->args[i], args[i]);
|
|
3092
|
3486 #endif /* not NEW_GC */
|
|
814
|
3487 for (i = nargs; i < f->max_args; i++)
|
|
3092
|
3488 #ifdef NEW_GC
|
|
|
3489 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i],
|
|
|
3490 Qnil);
|
|
|
3491 #else /* not NEW_GC */
|
|
814
|
3492 SPECBIND_FAST_UNSAFE (f->args[i], Qnil);
|
|
3092
|
3493 #endif /* not NEW_GC */
|
|
814
|
3494 }
|
|
|
3495 else if (f->max_args == MANY)
|
|
|
3496 handle_compiled_function_with_and_rest (f, nargs, args);
|
|
|
3497 else
|
|
|
3498 {
|
|
|
3499 wrong_number_of_arguments:
|
|
|
3500 /* The actual printed compiled_function object is incomprehensible.
|
|
|
3501 Check the backtrace to see if we can get a more meaningful symbol. */
|
|
|
3502 if (EQ (fun, indirect_function (*backtrace_list->function, 0)))
|
|
|
3503 fun = *backtrace_list->function;
|
|
|
3504 return Fsignal (Qwrong_number_of_arguments,
|
|
|
3505 list2 (fun, make_int (nargs)));
|
|
|
3506 }
|
|
|
3507
|
|
|
3508 {
|
|
|
3509 Lisp_Object value =
|
|
|
3510 execute_optimized_program ((Opbyte *) XOPAQUE_DATA (f->instructions),
|
|
|
3511 f->stack_depth,
|
|
|
3512 XVECTOR_DATA (f->constants));
|
|
|
3513
|
|
|
3514 /* The attempt to optimize this by only unbinding variables failed
|
|
|
3515 because using buffer-local variables as function parameters
|
|
|
3516 leads to specpdl_ptr->func != 0 */
|
|
|
3517 /* UNBIND_TO_GCPRO_VARIABLES_ONLY (speccount, value); */
|
|
|
3518 UNBIND_TO_GCPRO (speccount, value);
|
|
|
3519 return value;
|
|
|
3520 }
|
|
|
3521 }
|
|
|
3522
|
|
428
|
3523 DEFUN ("eval", Feval, 1, 1, 0, /*
|
|
|
3524 Evaluate FORM and return its value.
|
|
|
3525 */
|
|
|
3526 (form))
|
|
|
3527 {
|
|
|
3528 /* This function can GC */
|
|
|
3529 Lisp_Object fun, val, original_fun, original_args;
|
|
|
3530 int nargs;
|
|
|
3531 struct backtrace backtrace;
|
|
|
3532
|
|
1318
|
3533 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS
|
|
|
3534 check_proper_critical_section_lisp_protection ();
|
|
|
3535 #endif
|
|
|
3536
|
|
428
|
3537 /* I think this is a pretty safe place to call Lisp code, don't you? */
|
|
853
|
3538 while (!in_warnings && !NILP (Vpending_warnings)
|
|
|
3539 /* well, perhaps not so safe after all! */
|
|
|
3540 && !(inhibit_flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY))
|
|
428
|
3541 {
|
|
|
3542 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
1204
|
3543 Lisp_Object this_warning_cons, this_warning, class_, level, messij;
|
|
853
|
3544 int speccount = internal_bind_int (&in_warnings, 1);
|
|
|
3545
|
|
428
|
3546 this_warning_cons = Vpending_warnings;
|
|
|
3547 this_warning = XCAR (this_warning_cons);
|
|
|
3548 /* in case an error occurs in the warn function, at least
|
|
|
3549 it won't happen infinitely */
|
|
|
3550 Vpending_warnings = XCDR (Vpending_warnings);
|
|
853
|
3551 free_cons (this_warning_cons);
|
|
1204
|
3552 class_ = XCAR (this_warning);
|
|
428
|
3553 level = XCAR (XCDR (this_warning));
|
|
|
3554 messij = XCAR (XCDR (XCDR (this_warning)));
|
|
|
3555 free_list (this_warning);
|
|
|
3556
|
|
|
3557 if (NILP (Vpending_warnings))
|
|
|
3558 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary,
|
|
|
3559 but safer */
|
|
|
3560
|
|
1204
|
3561 GCPRO4 (form, class_, level, messij);
|
|
428
|
3562 if (!STRINGP (messij))
|
|
|
3563 messij = Fprin1_to_string (messij, Qnil);
|
|
1204
|
3564 call3 (Qdisplay_warning, class_, messij, level);
|
|
428
|
3565 UNGCPRO;
|
|
771
|
3566 unbind_to (speccount);
|
|
428
|
3567 }
|
|
|
3568
|
|
|
3569 if (!CONSP (form))
|
|
|
3570 {
|
|
|
3571 if (SYMBOLP (form))
|
|
|
3572 return Fsymbol_value (form);
|
|
|
3573 else
|
|
|
3574 return form;
|
|
|
3575 }
|
|
|
3576
|
|
|
3577 QUIT;
|
|
814
|
3578 if (need_to_garbage_collect)
|
|
428
|
3579 {
|
|
|
3580 struct gcpro gcpro1;
|
|
|
3581 GCPRO1 (form);
|
|
3092
|
3582 #ifdef NEW_GC
|
|
|
3583 gc_incremental ();
|
|
|
3584 #else /* not NEW_GC */
|
|
428
|
3585 garbage_collect_1 ();
|
|
3092
|
3586 #endif /* not NEW_GC */
|
|
428
|
3587 UNGCPRO;
|
|
|
3588 }
|
|
|
3589
|
|
|
3590 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3591 {
|
|
|
3592 if (max_lisp_eval_depth < 100)
|
|
|
3593 max_lisp_eval_depth = 100;
|
|
|
3594 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
563
|
3595 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'",
|
|
|
3596 Qunbound);
|
|
428
|
3597 }
|
|
|
3598
|
|
|
3599 /* We guaranteed CONSP (form) above */
|
|
|
3600 original_fun = XCAR (form);
|
|
|
3601 original_args = XCDR (form);
|
|
|
3602
|
|
|
3603 GET_EXTERNAL_LIST_LENGTH (original_args, nargs);
|
|
|
3604
|
|
|
3605 backtrace.pdlcount = specpdl_depth();
|
|
|
3606 backtrace.function = &original_fun; /* This also protects them from gc */
|
|
|
3607 backtrace.args = &original_args;
|
|
|
3608 backtrace.nargs = UNEVALLED;
|
|
|
3609 backtrace.evalargs = 1;
|
|
|
3610 backtrace.debug_on_exit = 0;
|
|
1292
|
3611 backtrace.function_being_called = 0;
|
|
428
|
3612 PUSH_BACKTRACE (backtrace);
|
|
|
3613
|
|
|
3614 if (debug_on_next_call)
|
|
|
3615 do_debug_on_call (Qt);
|
|
|
3616
|
|
|
3617 /* At this point, only original_fun and original_args
|
|
|
3618 have values that will be used below. */
|
|
|
3619 retry:
|
|
|
3620 fun = indirect_function (original_fun, 1);
|
|
|
3621
|
|
|
3622 if (SUBRP (fun))
|
|
|
3623 {
|
|
|
3624 Lisp_Subr *subr = XSUBR (fun);
|
|
|
3625 int max_args = subr->max_args;
|
|
|
3626
|
|
|
3627 if (nargs < subr->min_args)
|
|
|
3628 goto wrong_number_of_arguments;
|
|
|
3629
|
|
|
3630 if (max_args == UNEVALLED) /* Optimize for the common case */
|
|
|
3631 {
|
|
|
3632 backtrace.evalargs = 0;
|
|
1292
|
3633 PROFILE_ENTER_FUNCTION ();
|
|
428
|
3634 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr))
|
|
|
3635 (original_args));
|
|
1292
|
3636 PROFILE_EXIT_FUNCTION ();
|
|
428
|
3637 }
|
|
|
3638 else if (nargs <= max_args)
|
|
|
3639 {
|
|
|
3640 struct gcpro gcpro1;
|
|
|
3641 Lisp_Object args[SUBR_MAX_ARGS];
|
|
|
3642 REGISTER Lisp_Object *p = args;
|
|
|
3643
|
|
|
3644 GCPRO1 (args[0]);
|
|
|
3645 gcpro1.nvars = 0;
|
|
|
3646
|
|
|
3647 {
|
|
|
3648 LIST_LOOP_2 (arg, original_args)
|
|
|
3649 {
|
|
|
3650 *p++ = Feval (arg);
|
|
|
3651 gcpro1.nvars++;
|
|
|
3652 }
|
|
|
3653 }
|
|
|
3654
|
|
|
3655 /* &optional args default to nil. */
|
|
|
3656 while (p - args < max_args)
|
|
|
3657 *p++ = Qnil;
|
|
|
3658
|
|
|
3659 backtrace.args = args;
|
|
|
3660 backtrace.nargs = nargs;
|
|
|
3661
|
|
1292
|
3662 PROFILE_ENTER_FUNCTION ();
|
|
428
|
3663 FUNCALL_SUBR (val, subr, args, max_args);
|
|
1292
|
3664 PROFILE_EXIT_FUNCTION ();
|
|
428
|
3665
|
|
|
3666 UNGCPRO;
|
|
|
3667 }
|
|
|
3668 else if (max_args == MANY)
|
|
|
3669 {
|
|
|
3670 /* Pass a vector of evaluated arguments */
|
|
|
3671 struct gcpro gcpro1;
|
|
|
3672 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3673 REGISTER Lisp_Object *p = args;
|
|
|
3674
|
|
|
3675 GCPRO1 (args[0]);
|
|
|
3676 gcpro1.nvars = 0;
|
|
|
3677
|
|
|
3678 {
|
|
|
3679 LIST_LOOP_2 (arg, original_args)
|
|
|
3680 {
|
|
|
3681 *p++ = Feval (arg);
|
|
|
3682 gcpro1.nvars++;
|
|
|
3683 }
|
|
|
3684 }
|
|
|
3685
|
|
|
3686 backtrace.args = args;
|
|
|
3687 backtrace.nargs = nargs;
|
|
|
3688
|
|
1292
|
3689 PROFILE_ENTER_FUNCTION ();
|
|
428
|
3690 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr))
|
|
|
3691 (nargs, args));
|
|
1292
|
3692 PROFILE_EXIT_FUNCTION ();
|
|
428
|
3693
|
|
|
3694 UNGCPRO;
|
|
|
3695 }
|
|
|
3696 else
|
|
|
3697 {
|
|
|
3698 wrong_number_of_arguments:
|
|
440
|
3699 val = signal_wrong_number_of_arguments_error (original_fun, nargs);
|
|
428
|
3700 }
|
|
|
3701 }
|
|
|
3702 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3703 {
|
|
|
3704 struct gcpro gcpro1;
|
|
|
3705 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3706 REGISTER Lisp_Object *p = args;
|
|
|
3707
|
|
|
3708 GCPRO1 (args[0]);
|
|
|
3709 gcpro1.nvars = 0;
|
|
|
3710
|
|
|
3711 {
|
|
|
3712 LIST_LOOP_2 (arg, original_args)
|
|
|
3713 {
|
|
|
3714 *p++ = Feval (arg);
|
|
|
3715 gcpro1.nvars++;
|
|
|
3716 }
|
|
|
3717 }
|
|
|
3718
|
|
|
3719 backtrace.args = args;
|
|
|
3720 backtrace.nargs = nargs;
|
|
|
3721 backtrace.evalargs = 0;
|
|
|
3722
|
|
1292
|
3723 PROFILE_ENTER_FUNCTION ();
|
|
428
|
3724 val = funcall_compiled_function (fun, nargs, args);
|
|
1292
|
3725 PROFILE_EXIT_FUNCTION ();
|
|
428
|
3726
|
|
|
3727 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3728 if (backtrace.debug_on_exit)
|
|
|
3729 val = do_debug_on_exit (val);
|
|
|
3730 /* Don't do it again when we return to eval. */
|
|
|
3731 backtrace.debug_on_exit = 0;
|
|
|
3732
|
|
|
3733 UNGCPRO;
|
|
|
3734 }
|
|
|
3735 else if (CONSP (fun))
|
|
|
3736 {
|
|
|
3737 Lisp_Object funcar = XCAR (fun);
|
|
|
3738
|
|
|
3739 if (EQ (funcar, Qautoload))
|
|
|
3740 {
|
|
970
|
3741 /* do_autoload GCPROs both arguments */
|
|
428
|
3742 do_autoload (fun, original_fun);
|
|
|
3743 goto retry;
|
|
|
3744 }
|
|
|
3745 else if (EQ (funcar, Qmacro))
|
|
|
3746 {
|
|
1292
|
3747 PROFILE_ENTER_FUNCTION ();
|
|
428
|
3748 val = Feval (apply1 (XCDR (fun), original_args));
|
|
1292
|
3749 PROFILE_EXIT_FUNCTION ();
|
|
428
|
3750 }
|
|
|
3751 else if (EQ (funcar, Qlambda))
|
|
|
3752 {
|
|
|
3753 struct gcpro gcpro1;
|
|
|
3754 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3755 REGISTER Lisp_Object *p = args;
|
|
|
3756
|
|
|
3757 GCPRO1 (args[0]);
|
|
|
3758 gcpro1.nvars = 0;
|
|
|
3759
|
|
|
3760 {
|
|
|
3761 LIST_LOOP_2 (arg, original_args)
|
|
|
3762 {
|
|
|
3763 *p++ = Feval (arg);
|
|
|
3764 gcpro1.nvars++;
|
|
|
3765 }
|
|
|
3766 }
|
|
|
3767
|
|
|
3768 UNGCPRO;
|
|
|
3769
|
|
|
3770 backtrace.args = args; /* this also GCPROs `args' */
|
|
|
3771 backtrace.nargs = nargs;
|
|
|
3772 backtrace.evalargs = 0;
|
|
|
3773
|
|
1292
|
3774 PROFILE_ENTER_FUNCTION ();
|
|
428
|
3775 val = funcall_lambda (fun, nargs, args);
|
|
1292
|
3776 PROFILE_EXIT_FUNCTION ();
|
|
428
|
3777
|
|
|
3778 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3779 if (backtrace.debug_on_exit)
|
|
|
3780 val = do_debug_on_exit (val);
|
|
|
3781 /* Don't do it again when we return to eval. */
|
|
|
3782 backtrace.debug_on_exit = 0;
|
|
|
3783 }
|
|
|
3784 else
|
|
|
3785 {
|
|
|
3786 goto invalid_function;
|
|
|
3787 }
|
|
|
3788 }
|
|
|
3789 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun)) */
|
|
|
3790 {
|
|
|
3791 invalid_function:
|
|
436
|
3792 val = signal_invalid_function_error (fun);
|
|
428
|
3793 }
|
|
|
3794
|
|
|
3795 lisp_eval_depth--;
|
|
|
3796 if (backtrace.debug_on_exit)
|
|
|
3797 val = do_debug_on_exit (val);
|
|
|
3798 POP_BACKTRACE (backtrace);
|
|
|
3799 return val;
|
|
|
3800 }
|
|
|
3801
|
|
|
3802
|
|
1111
|
3803
|
|
|
3804 static void
|
|
|
3805 run_post_gc_hook (void)
|
|
|
3806 {
|
|
|
3807 Lisp_Object args[2];
|
|
|
3808
|
|
|
3809 args[0] = Qpost_gc_hook;
|
|
|
3810 args[1] = Fcons (Fcons (Qfinalize_list, zap_finalize_list ()), Qnil);
|
|
|
3811
|
|
|
3812 run_hook_with_args_trapping_problems
|
|
1333
|
3813 (Qgarbage_collecting, 2, args, RUN_HOOKS_TO_COMPLETION,
|
|
1111
|
3814 INHIBIT_QUIT | NO_INHIBIT_ERRORS);
|
|
|
3815 }
|
|
|
3816
|
|
428
|
3817 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /*
|
|
|
3818 Call first argument as a function, passing the remaining arguments to it.
|
|
|
3819 Thus, (funcall 'cons 'x 'y) returns (x . y).
|
|
|
3820 */
|
|
|
3821 (int nargs, Lisp_Object *args))
|
|
|
3822 {
|
|
|
3823 /* This function can GC */
|
|
|
3824 Lisp_Object fun;
|
|
|
3825 Lisp_Object val;
|
|
|
3826 struct backtrace backtrace;
|
|
|
3827 int fun_nargs = nargs - 1;
|
|
|
3828 Lisp_Object *fun_args = args + 1;
|
|
|
3829
|
|
1318
|
3830 /* QUIT will check for proper redisplay wrapping */
|
|
|
3831
|
|
428
|
3832 QUIT;
|
|
851
|
3833
|
|
|
3834 if (funcall_allocation_flag)
|
|
|
3835 {
|
|
|
3836 if (need_to_garbage_collect)
|
|
|
3837 /* Callers should gcpro lexpr args */
|
|
3092
|
3838 #ifdef NEW_GC
|
|
|
3839 gc_incremental ();
|
|
|
3840 #else /* not NEW_GC */
|
|
851
|
3841 garbage_collect_1 ();
|
|
3092
|
3842 #endif /* not NEW_GC */
|
|
851
|
3843 if (need_to_check_c_alloca)
|
|
|
3844 {
|
|
|
3845 if (++funcall_alloca_count >= MAX_FUNCALLS_BETWEEN_ALLOCA_CLEANUP)
|
|
|
3846 {
|
|
|
3847 xemacs_c_alloca (0);
|
|
|
3848 funcall_alloca_count = 0;
|
|
|
3849 }
|
|
|
3850 }
|
|
887
|
3851 if (need_to_signal_post_gc)
|
|
|
3852 {
|
|
|
3853 need_to_signal_post_gc = 0;
|
|
1111
|
3854 recompute_funcall_allocation_flag ();
|
|
3263
|
3855 #ifdef NEW_GC
|
|
|
3856 run_finalizers ();
|
|
|
3857 #endif /* NEW_GC */
|
|
1111
|
3858 run_post_gc_hook ();
|
|
887
|
3859 }
|
|
851
|
3860 }
|
|
428
|
3861
|
|
|
3862 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3863 {
|
|
|
3864 if (max_lisp_eval_depth < 100)
|
|
|
3865 max_lisp_eval_depth = 100;
|
|
|
3866 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
563
|
3867 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'",
|
|
|
3868 Qunbound);
|
|
428
|
3869 }
|
|
|
3870
|
|
1292
|
3871 backtrace.pdlcount = specpdl_depth ();
|
|
428
|
3872 backtrace.function = &args[0];
|
|
|
3873 backtrace.args = fun_args;
|
|
|
3874 backtrace.nargs = fun_nargs;
|
|
|
3875 backtrace.evalargs = 0;
|
|
|
3876 backtrace.debug_on_exit = 0;
|
|
1292
|
3877 backtrace.function_being_called = 0;
|
|
428
|
3878 PUSH_BACKTRACE (backtrace);
|
|
|
3879
|
|
|
3880 if (debug_on_next_call)
|
|
|
3881 do_debug_on_call (Qlambda);
|
|
|
3882
|
|
|
3883 retry:
|
|
|
3884
|
|
|
3885 fun = args[0];
|
|
|
3886
|
|
|
3887 /* We could call indirect_function directly, but profiling shows
|
|
|
3888 this is worth optimizing by partially unrolling the loop. */
|
|
|
3889 if (SYMBOLP (fun))
|
|
|
3890 {
|
|
|
3891 fun = XSYMBOL (fun)->function;
|
|
|
3892 if (SYMBOLP (fun))
|
|
|
3893 {
|
|
|
3894 fun = XSYMBOL (fun)->function;
|
|
|
3895 if (SYMBOLP (fun))
|
|
|
3896 fun = indirect_function (fun, 1);
|
|
|
3897 }
|
|
|
3898 }
|
|
|
3899
|
|
|
3900 if (SUBRP (fun))
|
|
|
3901 {
|
|
|
3902 Lisp_Subr *subr = XSUBR (fun);
|
|
|
3903 int max_args = subr->max_args;
|
|
|
3904 Lisp_Object spacious_args[SUBR_MAX_ARGS];
|
|
|
3905
|
|
|
3906 if (fun_nargs == max_args) /* Optimize for the common case */
|
|
|
3907 {
|
|
|
3908 funcall_subr:
|
|
1292
|
3909 PROFILE_ENTER_FUNCTION ();
|
|
428
|
3910 FUNCALL_SUBR (val, subr, fun_args, max_args);
|
|
1292
|
3911 PROFILE_EXIT_FUNCTION ();
|
|
428
|
3912 }
|
|
436
|
3913 else if (fun_nargs < subr->min_args)
|
|
|
3914 {
|
|
|
3915 goto wrong_number_of_arguments;
|
|
|
3916 }
|
|
428
|
3917 else if (fun_nargs < max_args)
|
|
|
3918 {
|
|
|
3919 Lisp_Object *p = spacious_args;
|
|
|
3920
|
|
|
3921 /* Default optionals to nil */
|
|
|
3922 while (fun_nargs--)
|
|
|
3923 *p++ = *fun_args++;
|
|
|
3924 while (p - spacious_args < max_args)
|
|
|
3925 *p++ = Qnil;
|
|
|
3926
|
|
|
3927 fun_args = spacious_args;
|
|
|
3928 goto funcall_subr;
|
|
|
3929 }
|
|
|
3930 else if (max_args == MANY)
|
|
|
3931 {
|
|
1292
|
3932 PROFILE_ENTER_FUNCTION ();
|
|
436
|
3933 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args);
|
|
1292
|
3934 PROFILE_EXIT_FUNCTION ();
|
|
428
|
3935 }
|
|
|
3936 else if (max_args == UNEVALLED) /* Can't funcall a special form */
|
|
|
3937 {
|
|
|
3938 goto invalid_function;
|
|
|
3939 }
|
|
|
3940 else
|
|
|
3941 {
|
|
|
3942 wrong_number_of_arguments:
|
|
436
|
3943 val = signal_wrong_number_of_arguments_error (fun, fun_nargs);
|
|
428
|
3944 }
|
|
|
3945 }
|
|
|
3946 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3947 {
|
|
1292
|
3948 PROFILE_ENTER_FUNCTION ();
|
|
428
|
3949 val = funcall_compiled_function (fun, fun_nargs, fun_args);
|
|
1292
|
3950 PROFILE_EXIT_FUNCTION ();
|
|
428
|
3951 }
|
|
|
3952 else if (CONSP (fun))
|
|
|
3953 {
|
|
|
3954 Lisp_Object funcar = XCAR (fun);
|
|
|
3955
|
|
|
3956 if (EQ (funcar, Qlambda))
|
|
|
3957 {
|
|
1292
|
3958 PROFILE_ENTER_FUNCTION ();
|
|
428
|
3959 val = funcall_lambda (fun, fun_nargs, fun_args);
|
|
1292
|
3960 PROFILE_EXIT_FUNCTION ();
|
|
428
|
3961 }
|
|
|
3962 else if (EQ (funcar, Qautoload))
|
|
|
3963 {
|
|
970
|
3964 /* do_autoload GCPROs both arguments */
|
|
428
|
3965 do_autoload (fun, args[0]);
|
|
|
3966 goto retry;
|
|
|
3967 }
|
|
|
3968 else /* Can't funcall a macro */
|
|
|
3969 {
|
|
|
3970 goto invalid_function;
|
|
|
3971 }
|
|
|
3972 }
|
|
|
3973 else if (UNBOUNDP (fun))
|
|
|
3974 {
|
|
436
|
3975 val = signal_void_function_error (args[0]);
|
|
428
|
3976 }
|
|
|
3977 else
|
|
|
3978 {
|
|
|
3979 invalid_function:
|
|
436
|
3980 val = signal_invalid_function_error (fun);
|
|
428
|
3981 }
|
|
|
3982
|
|
|
3983 lisp_eval_depth--;
|
|
|
3984 if (backtrace.debug_on_exit)
|
|
|
3985 val = do_debug_on_exit (val);
|
|
|
3986 POP_BACKTRACE (backtrace);
|
|
|
3987 return val;
|
|
|
3988 }
|
|
|
3989
|
|
|
3990 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /*
|
|
|
3991 Return t if OBJECT can be called as a function, else nil.
|
|
|
3992 A function is an object that can be applied to arguments,
|
|
|
3993 using for example `funcall' or `apply'.
|
|
|
3994 */
|
|
|
3995 (object))
|
|
|
3996 {
|
|
|
3997 if (SYMBOLP (object))
|
|
|
3998 object = indirect_function (object, 0);
|
|
|
3999
|
|
919
|
4000 if (COMPILED_FUNCTIONP (object) || SUBRP (object))
|
|
|
4001 return Qt;
|
|
|
4002 if (CONSP (object))
|
|
|
4003 {
|
|
|
4004 Lisp_Object car = XCAR (object);
|
|
|
4005 if (EQ (car, Qlambda))
|
|
|
4006 return Qt;
|
|
|
4007 if (EQ (car, Qautoload)
|
|
|
4008 && NILP (Fcar_safe (Fcdr_safe (Fcdr_safe (Fcdr_safe (XCDR (object)))))))
|
|
|
4009 return Qt;
|
|
|
4010 }
|
|
|
4011 return Qnil;
|
|
428
|
4012 }
|
|
|
4013
|
|
|
4014 static Lisp_Object
|
|
|
4015 function_argcount (Lisp_Object function, int function_min_args_p)
|
|
|
4016 {
|
|
|
4017 Lisp_Object orig_function = function;
|
|
|
4018 Lisp_Object arglist;
|
|
|
4019
|
|
|
4020 retry:
|
|
|
4021
|
|
|
4022 if (SYMBOLP (function))
|
|
|
4023 function = indirect_function (function, 1);
|
|
|
4024
|
|
|
4025 if (SUBRP (function))
|
|
|
4026 {
|
|
442
|
4027 /* Using return with the ?: operator tickles a DEC CC compiler bug. */
|
|
|
4028 if (function_min_args_p)
|
|
|
4029 return Fsubr_min_args (function);
|
|
|
4030 else
|
|
|
4031 return Fsubr_max_args (function);
|
|
428
|
4032 }
|
|
|
4033 else if (COMPILED_FUNCTIONP (function))
|
|
|
4034 {
|
|
814
|
4035 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (function);
|
|
|
4036
|
|
1737
|
4037 if (!OPAQUEP (f->instructions))
|
|
|
4038 /* Lazily munge the instructions into a more efficient form */
|
|
|
4039 /* Needed to set max_args */
|
|
|
4040 optimize_compiled_function (function);
|
|
|
4041
|
|
814
|
4042 if (function_min_args_p)
|
|
|
4043 return make_int (f->min_args);
|
|
|
4044 else if (f->max_args == MANY)
|
|
|
4045 return Qnil;
|
|
|
4046 else
|
|
|
4047 return make_int (f->max_args);
|
|
428
|
4048 }
|
|
|
4049 else if (CONSP (function))
|
|
|
4050 {
|
|
|
4051 Lisp_Object funcar = XCAR (function);
|
|
|
4052
|
|
|
4053 if (EQ (funcar, Qmacro))
|
|
|
4054 {
|
|
|
4055 function = XCDR (function);
|
|
|
4056 goto retry;
|
|
|
4057 }
|
|
|
4058 else if (EQ (funcar, Qautoload))
|
|
|
4059 {
|
|
970
|
4060 /* do_autoload GCPROs both arguments */
|
|
428
|
4061 do_autoload (function, orig_function);
|
|
442
|
4062 function = orig_function;
|
|
428
|
4063 goto retry;
|
|
|
4064 }
|
|
|
4065 else if (EQ (funcar, Qlambda))
|
|
|
4066 {
|
|
|
4067 arglist = Fcar (XCDR (function));
|
|
|
4068 }
|
|
|
4069 else
|
|
|
4070 {
|
|
|
4071 goto invalid_function;
|
|
|
4072 }
|
|
|
4073 }
|
|
|
4074 else
|
|
|
4075 {
|
|
|
4076 invalid_function:
|
|
442
|
4077 return signal_invalid_function_error (orig_function);
|
|
428
|
4078 }
|
|
|
4079
|
|
|
4080 {
|
|
|
4081 int argcount = 0;
|
|
|
4082
|
|
|
4083 EXTERNAL_LIST_LOOP_2 (arg, arglist)
|
|
|
4084 {
|
|
|
4085 if (EQ (arg, Qand_optional))
|
|
|
4086 {
|
|
|
4087 if (function_min_args_p)
|
|
|
4088 break;
|
|
|
4089 }
|
|
|
4090 else if (EQ (arg, Qand_rest))
|
|
|
4091 {
|
|
|
4092 if (function_min_args_p)
|
|
|
4093 break;
|
|
|
4094 else
|
|
|
4095 return Qnil;
|
|
|
4096 }
|
|
|
4097 else
|
|
|
4098 {
|
|
|
4099 argcount++;
|
|
|
4100 }
|
|
|
4101 }
|
|
|
4102
|
|
|
4103 return make_int (argcount);
|
|
|
4104 }
|
|
|
4105 }
|
|
|
4106
|
|
|
4107 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /*
|
|
617
|
4108 Return the minimum number of arguments a function may be called with.
|
|
428
|
4109 The function may be any form that can be passed to `funcall',
|
|
|
4110 any special form, or any macro.
|
|
853
|
4111
|
|
|
4112 To check if a function can be called with a specified number of
|
|
|
4113 arguments, use `function-allows-args'.
|
|
428
|
4114 */
|
|
|
4115 (function))
|
|
|
4116 {
|
|
|
4117 return function_argcount (function, 1);
|
|
|
4118 }
|
|
|
4119
|
|
|
4120 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /*
|
|
617
|
4121 Return the maximum number of arguments a function may be called with.
|
|
428
|
4122 The function may be any form that can be passed to `funcall',
|
|
|
4123 any special form, or any macro.
|
|
|
4124 If the function takes an arbitrary number of arguments or is
|
|
|
4125 a built-in special form, nil is returned.
|
|
853
|
4126
|
|
|
4127 To check if a function can be called with a specified number of
|
|
|
4128 arguments, use `function-allows-args'.
|
|
428
|
4129 */
|
|
|
4130 (function))
|
|
|
4131 {
|
|
|
4132 return function_argcount (function, 0);
|
|
|
4133 }
|
|
|
4134
|
|
|
4135
|
|
|
4136 DEFUN ("apply", Fapply, 2, MANY, 0, /*
|
|
|
4137 Call FUNCTION with the remaining args, using the last arg as a list of args.
|
|
|
4138 Thus, (apply '+ 1 2 '(3 4)) returns 10.
|
|
|
4139 */
|
|
|
4140 (int nargs, Lisp_Object *args))
|
|
|
4141 {
|
|
|
4142 /* This function can GC */
|
|
|
4143 Lisp_Object fun = args[0];
|
|
|
4144 Lisp_Object spread_arg = args [nargs - 1];
|
|
|
4145 int numargs;
|
|
|
4146 int funcall_nargs;
|
|
|
4147
|
|
|
4148 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs);
|
|
|
4149
|
|
|
4150 if (numargs == 0)
|
|
|
4151 /* (apply foo 0 1 '()) */
|
|
|
4152 return Ffuncall (nargs - 1, args);
|
|
|
4153 else if (numargs == 1)
|
|
|
4154 {
|
|
|
4155 /* (apply foo 0 1 '(2)) */
|
|
|
4156 args [nargs - 1] = XCAR (spread_arg);
|
|
|
4157 return Ffuncall (nargs, args);
|
|
|
4158 }
|
|
|
4159
|
|
|
4160 /* -1 for function, -1 for spread arg */
|
|
|
4161 numargs = nargs - 2 + numargs;
|
|
|
4162 /* +1 for function */
|
|
|
4163 funcall_nargs = 1 + numargs;
|
|
|
4164
|
|
|
4165 if (SYMBOLP (fun))
|
|
|
4166 fun = indirect_function (fun, 0);
|
|
|
4167
|
|
|
4168 if (SUBRP (fun))
|
|
|
4169 {
|
|
|
4170 Lisp_Subr *subr = XSUBR (fun);
|
|
|
4171 int max_args = subr->max_args;
|
|
|
4172
|
|
|
4173 if (numargs < subr->min_args
|
|
|
4174 || (max_args >= 0 && max_args < numargs))
|
|
|
4175 {
|
|
|
4176 /* Let funcall get the error */
|
|
|
4177 }
|
|
|
4178 else if (max_args > numargs)
|
|
|
4179 {
|
|
|
4180 /* Avoid having funcall cons up yet another new vector of arguments
|
|
|
4181 by explicitly supplying nil's for optional values */
|
|
|
4182 funcall_nargs += (max_args - numargs);
|
|
|
4183 }
|
|
|
4184 }
|
|
|
4185 else if (UNBOUNDP (fun))
|
|
|
4186 {
|
|
|
4187 /* Let funcall get the error */
|
|
|
4188 fun = args[0];
|
|
|
4189 }
|
|
|
4190
|
|
|
4191 {
|
|
|
4192 REGISTER int i;
|
|
|
4193 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs);
|
|
|
4194 struct gcpro gcpro1;
|
|
|
4195
|
|
|
4196 GCPRO1 (*funcall_args);
|
|
|
4197 gcpro1.nvars = funcall_nargs;
|
|
|
4198
|
|
|
4199 /* Copy in the unspread args */
|
|
|
4200 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object));
|
|
|
4201 /* Spread the last arg we got. Its first element goes in
|
|
|
4202 the slot that it used to occupy, hence this value of I. */
|
|
|
4203 for (i = nargs - 1;
|
|
|
4204 !NILP (spread_arg); /* i < 1 + numargs */
|
|
|
4205 i++, spread_arg = XCDR (spread_arg))
|
|
|
4206 {
|
|
|
4207 funcall_args [i] = XCAR (spread_arg);
|
|
|
4208 }
|
|
|
4209 /* Supply nil for optional args (to subrs) */
|
|
|
4210 for (; i < funcall_nargs; i++)
|
|
|
4211 funcall_args[i] = Qnil;
|
|
|
4212
|
|
|
4213
|
|
|
4214 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args));
|
|
|
4215 }
|
|
|
4216 }
|
|
|
4217
|
|
|
4218
|
|
|
4219 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and
|
|
|
4220 return the result of evaluation. */
|
|
|
4221
|
|
|
4222 static Lisp_Object
|
|
|
4223 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[])
|
|
|
4224 {
|
|
|
4225 /* This function can GC */
|
|
442
|
4226 Lisp_Object arglist, body, tail;
|
|
428
|
4227 int speccount = specpdl_depth();
|
|
|
4228 REGISTER int i = 0;
|
|
|
4229
|
|
|
4230 tail = XCDR (fun);
|
|
|
4231
|
|
|
4232 if (!CONSP (tail))
|
|
|
4233 goto invalid_function;
|
|
|
4234
|
|
|
4235 arglist = XCAR (tail);
|
|
|
4236 body = XCDR (tail);
|
|
|
4237
|
|
|
4238 {
|
|
|
4239 int optional = 0, rest = 0;
|
|
|
4240
|
|
442
|
4241 EXTERNAL_LIST_LOOP_2 (symbol, arglist)
|
|
428
|
4242 {
|
|
|
4243 if (!SYMBOLP (symbol))
|
|
|
4244 goto invalid_function;
|
|
|
4245 if (EQ (symbol, Qand_rest))
|
|
|
4246 rest = 1;
|
|
|
4247 else if (EQ (symbol, Qand_optional))
|
|
|
4248 optional = 1;
|
|
|
4249 else if (rest)
|
|
|
4250 {
|
|
|
4251 specbind (symbol, Flist (nargs - i, &args[i]));
|
|
|
4252 i = nargs;
|
|
|
4253 }
|
|
|
4254 else if (i < nargs)
|
|
|
4255 specbind (symbol, args[i++]);
|
|
|
4256 else if (!optional)
|
|
|
4257 goto wrong_number_of_arguments;
|
|
|
4258 else
|
|
|
4259 specbind (symbol, Qnil);
|
|
|
4260 }
|
|
|
4261 }
|
|
|
4262
|
|
|
4263 if (i < nargs)
|
|
|
4264 goto wrong_number_of_arguments;
|
|
|
4265
|
|
771
|
4266 return unbind_to_1 (speccount, Fprogn (body));
|
|
428
|
4267
|
|
|
4268 wrong_number_of_arguments:
|
|
436
|
4269 return signal_wrong_number_of_arguments_error (fun, nargs);
|
|
428
|
4270
|
|
|
4271 invalid_function:
|
|
436
|
4272 return signal_invalid_function_error (fun);
|
|
428
|
4273 }
|
|
|
4274
|
|
|
4275
|
|
|
4276 /************************************************************************/
|
|
|
4277 /* Run hook variables in various ways. */
|
|
|
4278 /************************************************************************/
|
|
|
4279
|
|
|
4280 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /*
|
|
|
4281 Run each hook in HOOKS. Major mode functions use this.
|
|
|
4282 Each argument should be a symbol, a hook variable.
|
|
|
4283 These symbols are processed in the order specified.
|
|
|
4284 If a hook symbol has a non-nil value, that value may be a function
|
|
|
4285 or a list of functions to be called to run the hook.
|
|
|
4286 If the value is a function, it is called with no arguments.
|
|
|
4287 If it is a list, the elements are called, in order, with no arguments.
|
|
|
4288
|
|
|
4289 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
4290 not `make-local-variable'.
|
|
|
4291 */
|
|
|
4292 (int nargs, Lisp_Object *args))
|
|
|
4293 {
|
|
|
4294 REGISTER int i;
|
|
|
4295
|
|
|
4296 for (i = 0; i < nargs; i++)
|
|
|
4297 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION);
|
|
|
4298
|
|
|
4299 return Qnil;
|
|
|
4300 }
|
|
|
4301
|
|
|
4302 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /*
|
|
|
4303 Run HOOK with the specified arguments ARGS.
|
|
|
4304 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
|
|
|
4305 value, that value may be a function or a list of functions to be
|
|
|
4306 called to run the hook. If the value is a function, it is called with
|
|
|
4307 the given arguments and its return value is returned. If it is a list
|
|
|
4308 of functions, those functions are called, in order,
|
|
|
4309 with the given arguments ARGS.
|
|
444
|
4310 It is best not to depend on the value returned by `run-hook-with-args',
|
|
428
|
4311 as that may change.
|
|
|
4312
|
|
|
4313 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
4314 not `make-local-variable'.
|
|
|
4315 */
|
|
|
4316 (int nargs, Lisp_Object *args))
|
|
|
4317 {
|
|
|
4318 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION);
|
|
|
4319 }
|
|
|
4320
|
|
|
4321 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /*
|
|
|
4322 Run HOOK with the specified arguments ARGS.
|
|
|
4323 HOOK should be a symbol, a hook variable. Its value should
|
|
|
4324 be a list of functions. We call those functions, one by one,
|
|
|
4325 passing arguments ARGS to each of them, until one of them
|
|
|
4326 returns a non-nil value. Then we return that value.
|
|
|
4327 If all the functions return nil, we return nil.
|
|
|
4328
|
|
|
4329 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
4330 not `make-local-variable'.
|
|
|
4331 */
|
|
|
4332 (int nargs, Lisp_Object *args))
|
|
|
4333 {
|
|
|
4334 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS);
|
|
|
4335 }
|
|
|
4336
|
|
|
4337 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /*
|
|
|
4338 Run HOOK with the specified arguments ARGS.
|
|
|
4339 HOOK should be a symbol, a hook variable. Its value should
|
|
|
4340 be a list of functions. We call those functions, one by one,
|
|
|
4341 passing arguments ARGS to each of them, until one of them
|
|
|
4342 returns nil. Then we return nil.
|
|
|
4343 If all the functions return non-nil, we return non-nil.
|
|
|
4344
|
|
|
4345 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
4346 not `make-local-variable'.
|
|
|
4347 */
|
|
|
4348 (int nargs, Lisp_Object *args))
|
|
|
4349 {
|
|
|
4350 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE);
|
|
|
4351 }
|
|
|
4352
|
|
|
4353 /* ARGS[0] should be a hook symbol.
|
|
|
4354 Call each of the functions in the hook value, passing each of them
|
|
|
4355 as arguments all the rest of ARGS (all NARGS - 1 elements).
|
|
|
4356 COND specifies a condition to test after each call
|
|
|
4357 to decide whether to stop.
|
|
|
4358 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
4359 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
4360
|
|
|
4361 Lisp_Object
|
|
|
4362 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args,
|
|
|
4363 enum run_hooks_condition cond)
|
|
|
4364 {
|
|
|
4365 Lisp_Object sym, val, ret;
|
|
|
4366
|
|
|
4367 if (!initialized || preparing_for_armageddon)
|
|
|
4368 /* We need to bail out of here pronto. */
|
|
|
4369 return Qnil;
|
|
|
4370
|
|
3092
|
4371 #ifndef NEW_GC
|
|
428
|
4372 /* Whenever gc_in_progress is true, preparing_for_armageddon
|
|
|
4373 will also be true unless something is really hosed. */
|
|
|
4374 assert (!gc_in_progress);
|
|
3092
|
4375 #endif /* not NEW_GC */
|
|
428
|
4376
|
|
|
4377 sym = args[0];
|
|
771
|
4378 val = symbol_value_in_buffer (sym, wrap_buffer (buf));
|
|
428
|
4379 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil);
|
|
|
4380
|
|
|
4381 if (UNBOUNDP (val) || NILP (val))
|
|
|
4382 return ret;
|
|
|
4383 else if (!CONSP (val) || EQ (XCAR (val), Qlambda))
|
|
|
4384 {
|
|
|
4385 args[0] = val;
|
|
|
4386 return Ffuncall (nargs, args);
|
|
|
4387 }
|
|
|
4388 else
|
|
|
4389 {
|
|
|
4390 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
4391 Lisp_Object globals = Qnil;
|
|
|
4392 GCPRO3 (sym, val, globals);
|
|
|
4393
|
|
|
4394 for (;
|
|
|
4395 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
4396 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret)
|
|
|
4397 : !NILP (ret)));
|
|
|
4398 val = XCDR (val))
|
|
|
4399 {
|
|
|
4400 if (EQ (XCAR (val), Qt))
|
|
|
4401 {
|
|
|
4402 /* t indicates this hook has a local binding;
|
|
|
4403 it means to run the global binding too. */
|
|
|
4404 globals = Fdefault_value (sym);
|
|
|
4405
|
|
|
4406 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) &&
|
|
|
4407 ! NILP (globals))
|
|
|
4408 {
|
|
|
4409 args[0] = globals;
|
|
|
4410 ret = Ffuncall (nargs, args);
|
|
|
4411 }
|
|
|
4412 else
|
|
|
4413 {
|
|
|
4414 for (;
|
|
|
4415 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
4416 || (cond == RUN_HOOKS_UNTIL_SUCCESS
|
|
|
4417 ? NILP (ret)
|
|
|
4418 : !NILP (ret)));
|
|
|
4419 globals = XCDR (globals))
|
|
|
4420 {
|
|
|
4421 args[0] = XCAR (globals);
|
|
|
4422 /* In a global value, t should not occur. If it does, we
|
|
|
4423 must ignore it to avoid an endless loop. */
|
|
|
4424 if (!EQ (args[0], Qt))
|
|
|
4425 ret = Ffuncall (nargs, args);
|
|
|
4426 }
|
|
|
4427 }
|
|
|
4428 }
|
|
|
4429 else
|
|
|
4430 {
|
|
|
4431 args[0] = XCAR (val);
|
|
|
4432 ret = Ffuncall (nargs, args);
|
|
|
4433 }
|
|
|
4434 }
|
|
|
4435
|
|
|
4436 UNGCPRO;
|
|
|
4437 return ret;
|
|
|
4438 }
|
|
|
4439 }
|
|
|
4440
|
|
|
4441 Lisp_Object
|
|
|
4442 run_hook_with_args (int nargs, Lisp_Object *args,
|
|
|
4443 enum run_hooks_condition cond)
|
|
|
4444 {
|
|
|
4445 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond);
|
|
|
4446 }
|
|
|
4447
|
|
|
4448 #if 0
|
|
|
4449
|
|
853
|
4450 /* From FSF 19.30, not currently used; seems like a big kludge. */
|
|
428
|
4451
|
|
|
4452 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual
|
|
|
4453 present value of that symbol.
|
|
|
4454 Call each element of FUNLIST,
|
|
|
4455 passing each of them the rest of ARGS.
|
|
|
4456 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
4457 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
4458
|
|
|
4459 Lisp_Object
|
|
|
4460 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args)
|
|
|
4461 {
|
|
853
|
4462 omitted;
|
|
428
|
4463 }
|
|
|
4464
|
|
|
4465 #endif /* 0 */
|
|
|
4466
|
|
|
4467 void
|
|
|
4468 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...)
|
|
|
4469 {
|
|
|
4470 /* This function can GC */
|
|
|
4471 struct gcpro gcpro1;
|
|
|
4472 int i;
|
|
|
4473 va_list vargs;
|
|
|
4474 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
4475
|
|
|
4476 va_start (vargs, nargs);
|
|
|
4477 funcall_args[0] = hook_var;
|
|
|
4478 for (i = 0; i < nargs; i++)
|
|
|
4479 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
4480 va_end (vargs);
|
|
|
4481
|
|
|
4482 GCPRO1 (*funcall_args);
|
|
|
4483 gcpro1.nvars = nargs + 1;
|
|
|
4484 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION);
|
|
|
4485 UNGCPRO;
|
|
|
4486 }
|
|
|
4487
|
|
|
4488 void
|
|
|
4489 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var,
|
|
|
4490 int nargs, ...)
|
|
|
4491 {
|
|
|
4492 /* This function can GC */
|
|
|
4493 struct gcpro gcpro1;
|
|
|
4494 int i;
|
|
|
4495 va_list vargs;
|
|
|
4496 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
4497
|
|
|
4498 va_start (vargs, nargs);
|
|
|
4499 funcall_args[0] = hook_var;
|
|
|
4500 for (i = 0; i < nargs; i++)
|
|
|
4501 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
4502 va_end (vargs);
|
|
|
4503
|
|
|
4504 GCPRO1 (*funcall_args);
|
|
|
4505 gcpro1.nvars = nargs + 1;
|
|
|
4506 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args,
|
|
|
4507 RUN_HOOKS_TO_COMPLETION);
|
|
|
4508 UNGCPRO;
|
|
|
4509 }
|
|
|
4510
|
|
|
4511 Lisp_Object
|
|
|
4512 run_hook (Lisp_Object hook)
|
|
|
4513 {
|
|
853
|
4514 return run_hook_with_args (1, &hook, RUN_HOOKS_TO_COMPLETION);
|
|
428
|
4515 }
|
|
|
4516
|
|
|
4517
|
|
|
4518 /************************************************************************/
|
|
|
4519 /* Front-ends to eval, funcall, apply */
|
|
|
4520 /************************************************************************/
|
|
|
4521
|
|
|
4522 /* Apply fn to arg */
|
|
|
4523 Lisp_Object
|
|
|
4524 apply1 (Lisp_Object fn, Lisp_Object arg)
|
|
|
4525 {
|
|
|
4526 /* This function can GC */
|
|
|
4527 struct gcpro gcpro1;
|
|
|
4528 Lisp_Object args[2];
|
|
|
4529
|
|
|
4530 if (NILP (arg))
|
|
|
4531 return Ffuncall (1, &fn);
|
|
|
4532 GCPRO1 (args[0]);
|
|
|
4533 gcpro1.nvars = 2;
|
|
|
4534 args[0] = fn;
|
|
|
4535 args[1] = arg;
|
|
|
4536 RETURN_UNGCPRO (Fapply (2, args));
|
|
|
4537 }
|
|
|
4538
|
|
|
4539 /* Call function fn on no arguments */
|
|
|
4540 Lisp_Object
|
|
|
4541 call0 (Lisp_Object fn)
|
|
|
4542 {
|
|
|
4543 /* This function can GC */
|
|
|
4544 struct gcpro gcpro1;
|
|
|
4545
|
|
|
4546 GCPRO1 (fn);
|
|
|
4547 RETURN_UNGCPRO (Ffuncall (1, &fn));
|
|
|
4548 }
|
|
|
4549
|
|
|
4550 /* Call function fn with argument arg0 */
|
|
|
4551 Lisp_Object
|
|
|
4552 call1 (Lisp_Object fn,
|
|
|
4553 Lisp_Object arg0)
|
|
|
4554 {
|
|
|
4555 /* This function can GC */
|
|
|
4556 struct gcpro gcpro1;
|
|
|
4557 Lisp_Object args[2];
|
|
|
4558 args[0] = fn;
|
|
|
4559 args[1] = arg0;
|
|
|
4560 GCPRO1 (args[0]);
|
|
|
4561 gcpro1.nvars = 2;
|
|
|
4562 RETURN_UNGCPRO (Ffuncall (2, args));
|
|
|
4563 }
|
|
|
4564
|
|
|
4565 /* Call function fn with arguments arg0, arg1 */
|
|
|
4566 Lisp_Object
|
|
|
4567 call2 (Lisp_Object fn,
|
|
|
4568 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4569 {
|
|
|
4570 /* This function can GC */
|
|
|
4571 struct gcpro gcpro1;
|
|
|
4572 Lisp_Object args[3];
|
|
|
4573 args[0] = fn;
|
|
|
4574 args[1] = arg0;
|
|
|
4575 args[2] = arg1;
|
|
|
4576 GCPRO1 (args[0]);
|
|
|
4577 gcpro1.nvars = 3;
|
|
|
4578 RETURN_UNGCPRO (Ffuncall (3, args));
|
|
|
4579 }
|
|
|
4580
|
|
|
4581 /* Call function fn with arguments arg0, arg1, arg2 */
|
|
|
4582 Lisp_Object
|
|
|
4583 call3 (Lisp_Object fn,
|
|
|
4584 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4585 {
|
|
|
4586 /* This function can GC */
|
|
|
4587 struct gcpro gcpro1;
|
|
|
4588 Lisp_Object args[4];
|
|
|
4589 args[0] = fn;
|
|
|
4590 args[1] = arg0;
|
|
|
4591 args[2] = arg1;
|
|
|
4592 args[3] = arg2;
|
|
|
4593 GCPRO1 (args[0]);
|
|
|
4594 gcpro1.nvars = 4;
|
|
|
4595 RETURN_UNGCPRO (Ffuncall (4, args));
|
|
|
4596 }
|
|
|
4597
|
|
|
4598 /* Call function fn with arguments arg0, arg1, arg2, arg3 */
|
|
|
4599 Lisp_Object
|
|
|
4600 call4 (Lisp_Object fn,
|
|
|
4601 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4602 Lisp_Object arg3)
|
|
|
4603 {
|
|
|
4604 /* This function can GC */
|
|
|
4605 struct gcpro gcpro1;
|
|
|
4606 Lisp_Object args[5];
|
|
|
4607 args[0] = fn;
|
|
|
4608 args[1] = arg0;
|
|
|
4609 args[2] = arg1;
|
|
|
4610 args[3] = arg2;
|
|
|
4611 args[4] = arg3;
|
|
|
4612 GCPRO1 (args[0]);
|
|
|
4613 gcpro1.nvars = 5;
|
|
|
4614 RETURN_UNGCPRO (Ffuncall (5, args));
|
|
|
4615 }
|
|
|
4616
|
|
|
4617 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */
|
|
|
4618 Lisp_Object
|
|
|
4619 call5 (Lisp_Object fn,
|
|
|
4620 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4621 Lisp_Object arg3, Lisp_Object arg4)
|
|
|
4622 {
|
|
|
4623 /* This function can GC */
|
|
|
4624 struct gcpro gcpro1;
|
|
|
4625 Lisp_Object args[6];
|
|
|
4626 args[0] = fn;
|
|
|
4627 args[1] = arg0;
|
|
|
4628 args[2] = arg1;
|
|
|
4629 args[3] = arg2;
|
|
|
4630 args[4] = arg3;
|
|
|
4631 args[5] = arg4;
|
|
|
4632 GCPRO1 (args[0]);
|
|
|
4633 gcpro1.nvars = 6;
|
|
|
4634 RETURN_UNGCPRO (Ffuncall (6, args));
|
|
|
4635 }
|
|
|
4636
|
|
|
4637 Lisp_Object
|
|
|
4638 call6 (Lisp_Object fn,
|
|
|
4639 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4640 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5)
|
|
|
4641 {
|
|
|
4642 /* This function can GC */
|
|
|
4643 struct gcpro gcpro1;
|
|
|
4644 Lisp_Object args[7];
|
|
|
4645 args[0] = fn;
|
|
|
4646 args[1] = arg0;
|
|
|
4647 args[2] = arg1;
|
|
|
4648 args[3] = arg2;
|
|
|
4649 args[4] = arg3;
|
|
|
4650 args[5] = arg4;
|
|
|
4651 args[6] = arg5;
|
|
|
4652 GCPRO1 (args[0]);
|
|
|
4653 gcpro1.nvars = 7;
|
|
|
4654 RETURN_UNGCPRO (Ffuncall (7, args));
|
|
|
4655 }
|
|
|
4656
|
|
|
4657 Lisp_Object
|
|
|
4658 call7 (Lisp_Object fn,
|
|
|
4659 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4660 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4661 Lisp_Object arg6)
|
|
|
4662 {
|
|
|
4663 /* This function can GC */
|
|
|
4664 struct gcpro gcpro1;
|
|
|
4665 Lisp_Object args[8];
|
|
|
4666 args[0] = fn;
|
|
|
4667 args[1] = arg0;
|
|
|
4668 args[2] = arg1;
|
|
|
4669 args[3] = arg2;
|
|
|
4670 args[4] = arg3;
|
|
|
4671 args[5] = arg4;
|
|
|
4672 args[6] = arg5;
|
|
|
4673 args[7] = arg6;
|
|
|
4674 GCPRO1 (args[0]);
|
|
|
4675 gcpro1.nvars = 8;
|
|
|
4676 RETURN_UNGCPRO (Ffuncall (8, args));
|
|
|
4677 }
|
|
|
4678
|
|
|
4679 Lisp_Object
|
|
|
4680 call8 (Lisp_Object fn,
|
|
|
4681 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4682 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4683 Lisp_Object arg6, Lisp_Object arg7)
|
|
|
4684 {
|
|
|
4685 /* This function can GC */
|
|
|
4686 struct gcpro gcpro1;
|
|
|
4687 Lisp_Object args[9];
|
|
|
4688 args[0] = fn;
|
|
|
4689 args[1] = arg0;
|
|
|
4690 args[2] = arg1;
|
|
|
4691 args[3] = arg2;
|
|
|
4692 args[4] = arg3;
|
|
|
4693 args[5] = arg4;
|
|
|
4694 args[6] = arg5;
|
|
|
4695 args[7] = arg6;
|
|
|
4696 args[8] = arg7;
|
|
|
4697 GCPRO1 (args[0]);
|
|
|
4698 gcpro1.nvars = 9;
|
|
|
4699 RETURN_UNGCPRO (Ffuncall (9, args));
|
|
|
4700 }
|
|
|
4701
|
|
|
4702 Lisp_Object
|
|
|
4703 call0_in_buffer (struct buffer *buf, Lisp_Object fn)
|
|
|
4704 {
|
|
|
4705 if (current_buffer == buf)
|
|
|
4706 return call0 (fn);
|
|
|
4707 else
|
|
|
4708 {
|
|
|
4709 Lisp_Object val;
|
|
|
4710 int speccount = specpdl_depth();
|
|
|
4711 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4712 set_buffer_internal (buf);
|
|
|
4713 val = call0 (fn);
|
|
771
|
4714 unbind_to (speccount);
|
|
428
|
4715 return val;
|
|
|
4716 }
|
|
|
4717 }
|
|
|
4718
|
|
|
4719 Lisp_Object
|
|
|
4720 call1_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4721 Lisp_Object arg0)
|
|
|
4722 {
|
|
|
4723 if (current_buffer == buf)
|
|
|
4724 return call1 (fn, arg0);
|
|
|
4725 else
|
|
|
4726 {
|
|
|
4727 Lisp_Object val;
|
|
|
4728 int speccount = specpdl_depth();
|
|
|
4729 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4730 set_buffer_internal (buf);
|
|
|
4731 val = call1 (fn, arg0);
|
|
771
|
4732 unbind_to (speccount);
|
|
428
|
4733 return val;
|
|
|
4734 }
|
|
|
4735 }
|
|
|
4736
|
|
|
4737 Lisp_Object
|
|
|
4738 call2_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4739 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4740 {
|
|
|
4741 if (current_buffer == buf)
|
|
|
4742 return call2 (fn, arg0, arg1);
|
|
|
4743 else
|
|
|
4744 {
|
|
|
4745 Lisp_Object val;
|
|
|
4746 int speccount = specpdl_depth();
|
|
|
4747 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4748 set_buffer_internal (buf);
|
|
|
4749 val = call2 (fn, arg0, arg1);
|
|
771
|
4750 unbind_to (speccount);
|
|
428
|
4751 return val;
|
|
|
4752 }
|
|
|
4753 }
|
|
|
4754
|
|
|
4755 Lisp_Object
|
|
|
4756 call3_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4757 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4758 {
|
|
|
4759 if (current_buffer == buf)
|
|
|
4760 return call3 (fn, arg0, arg1, arg2);
|
|
|
4761 else
|
|
|
4762 {
|
|
|
4763 Lisp_Object val;
|
|
|
4764 int speccount = specpdl_depth();
|
|
|
4765 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4766 set_buffer_internal (buf);
|
|
|
4767 val = call3 (fn, arg0, arg1, arg2);
|
|
771
|
4768 unbind_to (speccount);
|
|
428
|
4769 return val;
|
|
|
4770 }
|
|
|
4771 }
|
|
|
4772
|
|
|
4773 Lisp_Object
|
|
|
4774 call4_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4775 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4776 Lisp_Object arg3)
|
|
|
4777 {
|
|
|
4778 if (current_buffer == buf)
|
|
|
4779 return call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4780 else
|
|
|
4781 {
|
|
|
4782 Lisp_Object val;
|
|
|
4783 int speccount = specpdl_depth();
|
|
|
4784 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4785 set_buffer_internal (buf);
|
|
|
4786 val = call4 (fn, arg0, arg1, arg2, arg3);
|
|
771
|
4787 unbind_to (speccount);
|
|
428
|
4788 return val;
|
|
|
4789 }
|
|
|
4790 }
|
|
|
4791
|
|
|
4792 Lisp_Object
|
|
|
4793 eval_in_buffer (struct buffer *buf, Lisp_Object form)
|
|
|
4794 {
|
|
|
4795 if (current_buffer == buf)
|
|
|
4796 return Feval (form);
|
|
|
4797 else
|
|
|
4798 {
|
|
|
4799 Lisp_Object val;
|
|
|
4800 int speccount = specpdl_depth();
|
|
|
4801 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4802 set_buffer_internal (buf);
|
|
|
4803 val = Feval (form);
|
|
771
|
4804 unbind_to (speccount);
|
|
428
|
4805 return val;
|
|
|
4806 }
|
|
|
4807 }
|
|
|
4808
|
|
|
4809
|
|
|
4810 /************************************************************************/
|
|
|
4811 /* Error-catching front-ends to eval, funcall, apply */
|
|
|
4812 /************************************************************************/
|
|
|
4813
|
|
853
|
4814 int
|
|
|
4815 get_inhibit_flags (void)
|
|
|
4816 {
|
|
|
4817 return inhibit_flags;
|
|
|
4818 }
|
|
|
4819
|
|
|
4820 void
|
|
2286
|
4821 check_allowed_operation (int what, Lisp_Object obj, Lisp_Object UNUSED (prop))
|
|
853
|
4822 {
|
|
|
4823 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION)
|
|
|
4824 {
|
|
|
4825 if (what == OPERATION_MODIFY_BUFFER_TEXT && BUFFERP (obj)
|
|
|
4826 && NILP (memq_no_quit (obj, Vmodifiable_buffers)))
|
|
|
4827 invalid_change
|
|
|
4828 ("Modification of this buffer not currently permitted", obj);
|
|
|
4829 }
|
|
|
4830 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION)
|
|
|
4831 {
|
|
|
4832 if (what == OPERATION_DELETE_OBJECT
|
|
|
4833 && (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj)
|
|
|
4834 || CONSOLEP (obj))
|
|
|
4835 && NILP (memq_no_quit (obj, Vdeletable_permanent_display_objects)))
|
|
|
4836 invalid_change
|
|
|
4837 ("Deletion of this object not currently permitted", obj);
|
|
|
4838 }
|
|
|
4839 }
|
|
|
4840
|
|
|
4841 void
|
|
|
4842 note_object_created (Lisp_Object obj)
|
|
|
4843 {
|
|
|
4844 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION)
|
|
|
4845 {
|
|
|
4846 if (BUFFERP (obj))
|
|
|
4847 Vmodifiable_buffers = Fcons (obj, Vmodifiable_buffers);
|
|
|
4848 }
|
|
|
4849 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION)
|
|
|
4850 {
|
|
|
4851 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj)
|
|
|
4852 || CONSOLEP (obj))
|
|
|
4853 Vdeletable_permanent_display_objects =
|
|
|
4854 Fcons (obj, Vdeletable_permanent_display_objects);
|
|
|
4855 }
|
|
|
4856 }
|
|
|
4857
|
|
|
4858 void
|
|
|
4859 note_object_deleted (Lisp_Object obj)
|
|
|
4860 {
|
|
|
4861 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION)
|
|
|
4862 {
|
|
|
4863 if (BUFFERP (obj))
|
|
|
4864 Vmodifiable_buffers = delq_no_quit (obj, Vmodifiable_buffers);
|
|
|
4865 }
|
|
|
4866 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION)
|
|
|
4867 {
|
|
|
4868 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj)
|
|
|
4869 || CONSOLEP (obj))
|
|
|
4870 Vdeletable_permanent_display_objects =
|
|
|
4871 delq_no_quit (obj, Vdeletable_permanent_display_objects);
|
|
|
4872 }
|
|
|
4873 }
|
|
|
4874
|
|
|
4875 struct call_trapping_problems
|
|
|
4876 {
|
|
|
4877 Lisp_Object catchtag;
|
|
|
4878 Lisp_Object error_conditions;
|
|
|
4879 Lisp_Object data;
|
|
|
4880 Lisp_Object backtrace;
|
|
|
4881 Lisp_Object warning_class;
|
|
|
4882
|
|
867
|
4883 const CIbyte *warning_string;
|
|
853
|
4884 Lisp_Object (*fun) (void *);
|
|
|
4885 void *arg;
|
|
|
4886 };
|
|
428
|
4887
|
|
2532
|
4888 static Lisp_Object
|
|
|
4889 maybe_get_trapping_problems_backtrace (void)
|
|
|
4890 {
|
|
|
4891 Lisp_Object backtrace;
|
|
853
|
4892
|
|
1123
|
4893 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE)
|
|
2532
|
4894 && !warning_will_be_discarded (current_warning_level ()))
|
|
428
|
4895 {
|
|
1333
|
4896 struct gcpro gcpro1;
|
|
|
4897 Lisp_Object lstream = Qnil;
|
|
|
4898 int speccount = specpdl_depth ();
|
|
|
4899
|
|
853
|
4900 /* We're no longer protected against errors or quit here, so at
|
|
|
4901 least let's temporarily inhibit quit. We definitely do not
|
|
|
4902 want to inhibit quit during the calling of the function
|
|
|
4903 itself!!!!!!!!!!! */
|
|
|
4904
|
|
|
4905 specbind (Qinhibit_quit, Qt);
|
|
|
4906
|
|
|
4907 GCPRO1 (lstream);
|
|
|
4908 lstream = make_resizing_buffer_output_stream ();
|
|
|
4909 Fbacktrace (lstream, Qt);
|
|
|
4910 Lstream_flush (XLSTREAM (lstream));
|
|
2532
|
4911 backtrace = resizing_buffer_to_lisp_string (XLSTREAM (lstream));
|
|
853
|
4912 Lstream_delete (XLSTREAM (lstream));
|
|
|
4913 UNGCPRO;
|
|
|
4914
|
|
|
4915 unbind_to (speccount);
|
|
428
|
4916 }
|
|
853
|
4917 else
|
|
2532
|
4918 backtrace = Qnil;
|
|
|
4919
|
|
|
4920 return backtrace;
|
|
|
4921 }
|
|
|
4922
|
|
|
4923 static DECLARE_DOESNT_RETURN_TYPE
|
|
|
4924 (Lisp_Object, flagged_a_squirmer (Lisp_Object, Lisp_Object, Lisp_Object));
|
|
|
4925
|
|
|
4926 static DOESNT_RETURN_TYPE (Lisp_Object)
|
|
|
4927 flagged_a_squirmer (Lisp_Object error_conditions, Lisp_Object data,
|
|
|
4928 Lisp_Object opaque)
|
|
|
4929 {
|
|
|
4930 struct call_trapping_problems *p =
|
|
|
4931 (struct call_trapping_problems *) get_opaque_ptr (opaque);
|
|
|
4932
|
|
|
4933 if (!EQ (error_conditions, Qquit))
|
|
|
4934 p->backtrace = maybe_get_trapping_problems_backtrace ();
|
|
|
4935 else
|
|
853
|
4936 p->backtrace = Qnil;
|
|
|
4937 p->error_conditions = error_conditions;
|
|
|
4938 p->data = data;
|
|
|
4939
|
|
|
4940 Fthrow (p->catchtag, Qnil);
|
|
2268
|
4941 RETURN_NOT_REACHED (Qnil);
|
|
853
|
4942 }
|
|
|
4943
|
|
|
4944 static Lisp_Object
|
|
|
4945 call_trapping_problems_2 (Lisp_Object opaque)
|
|
|
4946 {
|
|
|
4947 struct call_trapping_problems *p =
|
|
|
4948 (struct call_trapping_problems *) get_opaque_ptr (opaque);
|
|
|
4949
|
|
|
4950 return (p->fun) (p->arg);
|
|
428
|
4951 }
|
|
|
4952
|
|
|
4953 static Lisp_Object
|
|
853
|
4954 call_trapping_problems_1 (Lisp_Object opaque)
|
|
|
4955 {
|
|
|
4956 return call_with_condition_handler (flagged_a_squirmer, opaque,
|
|
|
4957 call_trapping_problems_2, opaque);
|
|
|
4958 }
|
|
|
4959
|
|
1333
|
4960 static void
|
|
|
4961 issue_call_trapping_problems_warning (Lisp_Object warning_class,
|
|
|
4962 const CIbyte *warning_string,
|
|
|
4963 struct call_trapping_problems_result *p)
|
|
|
4964 {
|
|
|
4965 if (!warning_will_be_discarded (current_warning_level ()))
|
|
|
4966 {
|
|
|
4967 int depth = specpdl_depth ();
|
|
|
4968
|
|
|
4969 /* We're no longer protected against errors or quit here, so at
|
|
|
4970 least let's temporarily inhibit quit. */
|
|
|
4971 specbind (Qinhibit_quit, Qt);
|
|
|
4972
|
|
|
4973 if (p->caught_throw)
|
|
|
4974 {
|
|
|
4975 Lisp_Object errstr =
|
|
|
4976 emacs_sprintf_string_lisp
|
|
2532
|
4977 ("%s: Attempt to throw outside of function:"
|
|
|
4978 "To catch `%s' with value `%s'\n\nBacktrace follows:\n\n%s",
|
|
2725
|
4979 Qnil, 4,
|
|
1333
|
4980 build_msg_string (warning_string ? warning_string : "error"),
|
|
2532
|
4981 p->thrown_tag, p->thrown_value, p->backtrace);
|
|
1333
|
4982 warn_when_safe_lispobj (Qerror, current_warning_level (), errstr);
|
|
|
4983 }
|
|
2421
|
4984 else if (p->caught_error && !EQ (p->error_conditions, Qquit))
|
|
1333
|
4985 {
|
|
|
4986 Lisp_Object errstr;
|
|
|
4987 /* #### This should call
|
|
|
4988 (with-output-to-string (display-error (cons error_conditions
|
|
|
4989 data))
|
|
|
4990 but that stuff is all in Lisp currently. */
|
|
|
4991 errstr =
|
|
|
4992 emacs_sprintf_string_lisp
|
|
|
4993 ("%s: (%s %s)\n\nBacktrace follows:\n\n%s",
|
|
|
4994 Qnil, 4,
|
|
|
4995 build_msg_string (warning_string ? warning_string : "error"),
|
|
|
4996 p->error_conditions, p->data, p->backtrace);
|
|
|
4997
|
|
|
4998 warn_when_safe_lispobj (warning_class, current_warning_level (),
|
|
|
4999 errstr);
|
|
|
5000 }
|
|
|
5001
|
|
|
5002 unbind_to (depth);
|
|
|
5003 }
|
|
|
5004 }
|
|
|
5005
|
|
1318
|
5006 /* Turn on the trapping flags in FLAGS -- see call_trapping_problems().
|
|
|
5007 This cannot handle INTERNAL_INHIBIT_THROWS() or INTERNAL_INHIBIT_ERRORS
|
|
|
5008 (because they ultimately boil down to a setjmp()!) -- you must directly
|
|
|
5009 use call_trapping_problems() for that. Turn the flags off with
|
|
|
5010 unbind_to(). Returns the "canonicalized" flags (particularly in the
|
|
|
5011 case of INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, which is shorthand for
|
|
|
5012 various other flags). */
|
|
|
5013
|
|
|
5014 int
|
|
|
5015 set_trapping_problems_flags (int flags)
|
|
|
5016 {
|
|
|
5017 int new_inhibit_flags;
|
|
|
5018
|
|
|
5019 if (flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY)
|
|
|
5020 flags |= INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION
|
|
|
5021 | INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION
|
|
|
5022 | INHIBIT_ENTERING_DEBUGGER
|
|
|
5023 | INHIBIT_WARNING_ISSUE
|
|
|
5024 | INHIBIT_GC;
|
|
|
5025
|
|
|
5026 new_inhibit_flags = inhibit_flags | flags;
|
|
|
5027 if (new_inhibit_flags != inhibit_flags)
|
|
|
5028 internal_bind_int (&inhibit_flags, new_inhibit_flags);
|
|
|
5029
|
|
|
5030 if (flags & INHIBIT_QUIT)
|
|
|
5031 specbind (Qinhibit_quit, Qt);
|
|
|
5032
|
|
|
5033 if (flags & UNINHIBIT_QUIT)
|
|
|
5034 begin_do_check_for_quit ();
|
|
|
5035
|
|
|
5036 if (flags & INHIBIT_GC)
|
|
|
5037 begin_gc_forbidden ();
|
|
|
5038
|
|
|
5039 /* #### If we have nested calls to call_trapping_problems(), and the
|
|
|
5040 inner one creates some buffers/etc., should the outer one be able
|
|
|
5041 to delete them? I think so, but it means we need to combine rather
|
|
|
5042 than just reset the value. */
|
|
|
5043 if (flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION)
|
|
|
5044 internal_bind_lisp_object (&Vdeletable_permanent_display_objects, Qnil);
|
|
|
5045
|
|
|
5046 if (flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION)
|
|
|
5047 internal_bind_lisp_object (&Vmodifiable_buffers, Qnil);
|
|
|
5048
|
|
|
5049 return flags;
|
|
|
5050 }
|
|
|
5051
|
|
853
|
5052 /* This is equivalent to (*fun) (arg), except that various conditions
|
|
|
5053 can be trapped or inhibited, according to FLAGS.
|
|
|
5054
|
|
|
5055 If FLAGS does not contain NO_INHIBIT_ERRORS, when an error occurs,
|
|
|
5056 the error is caught and a warning is issued, specifying the
|
|
|
5057 specific error that occurred and a backtrace. In that case,
|
|
|
5058 WARNING_STRING should be given, and will be printed at the
|
|
|
5059 beginning of the error to indicate where the error occurred.
|
|
|
5060
|
|
|
5061 If FLAGS does not contain NO_INHIBIT_THROWS, all attempts to
|
|
|
5062 `throw' out of the function being called are trapped, and a warning
|
|
|
5063 issued. (Again, WARNING_STRING should be given.)
|
|
|
5064
|
|
2367
|
5065 If FLAGS contains INHIBIT_WARNING_ISSUE, no warnings are issued;
|
|
853
|
5066 this applies to recursive invocations of call_trapping_problems, too.
|
|
|
5067
|
|
1333
|
5068 If FLAGS contains POSTPONE_WARNING_ISSUE, no warnings are issued;
|
|
|
5069 but values useful for generating a warning are still computed (in
|
|
|
5070 particular, the backtrace), so that the calling function can issue
|
|
|
5071 a warning.
|
|
|
5072
|
|
853
|
5073 If FLAGS contains ISSUE_WARNINGS_AT_DEBUG_LEVEL, warnings will be
|
|
|
5074 issued, but at level `debug', which normally is below the minimum
|
|
|
5075 specified by `log-warning-minimum-level', meaning such warnings will
|
|
|
5076 be ignored entirely. The user can change this variable, however,
|
|
|
5077 to see the warnings.)
|
|
|
5078
|
|
|
5079 Note: If neither of NO_INHIBIT_THROWS or NO_INHIBIT_ERRORS is
|
|
|
5080 given, you are *guaranteed* that there will be no non-local exits
|
|
|
5081 out of this function.
|
|
|
5082
|
|
|
5083 If FLAGS contains INHIBIT_QUIT, QUIT using C-g is inhibited. (This
|
|
|
5084 is *rarely* a good idea. Unless you use NO_INHIBIT_ERRORS, QUIT is
|
|
|
5085 automatically caught as well, and treated as an error; you can
|
|
|
5086 check for this using EQ (problems->error_conditions, Qquit).
|
|
|
5087
|
|
|
5088 If FLAGS contains UNINHIBIT_QUIT, QUIT checking will be explicitly
|
|
|
5089 turned on. (It will abort the code being called, but will still be
|
|
|
5090 trapped and reported as an error, unless NO_INHIBIT_ERRORS is
|
|
|
5091 given.) This is useful when QUIT checking has been turned off by a
|
|
|
5092 higher-level caller.
|
|
|
5093
|
|
|
5094 If FLAGS contains INHIBIT_GC, garbage collection is inhibited.
|
|
1123
|
5095 This is useful for Lisp called within redisplay, for example.
|
|
853
|
5096
|
|
|
5097 If FLAGS contains INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION,
|
|
|
5098 Lisp code is not allowed to delete any window, buffers, frames, devices,
|
|
|
5099 or consoles that were already in existence at the time this function
|
|
|
5100 was called. (However, it's perfectly legal for code to create a new
|
|
|
5101 buffer and then delete it.)
|
|
|
5102
|
|
|
5103 #### It might be useful to have a flag that inhibits deletion of a
|
|
|
5104 specific permanent display object and everything it's attached to
|
|
|
5105 (e.g. a window, and the buffer, frame, device, and console it's
|
|
|
5106 attached to.
|
|
|
5107
|
|
|
5108 If FLAGS contains INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION, Lisp
|
|
|
5109 code is not allowed to modify the text of any buffers that were
|
|
|
5110 already in existence at the time this function was called.
|
|
|
5111 (However, it's perfectly legal for code to create a new buffer and
|
|
|
5112 then modify its text.)
|
|
|
5113
|
|
|
5114 [These last two flags are implemented using global variables
|
|
|
5115 Vdeletable_permanent_display_objects and Vmodifiable_buffers,
|
|
|
5116 which keep track of a list of all buffers or permanent display
|
|
|
5117 objects created since the last time one of these flags was set.
|
|
|
5118 The code that deletes buffers, etc. and modifies buffers checks
|
|
|
5119
|
|
|
5120 (1) if the corresponding flag is set (through the global variable
|
|
|
5121 inhibit_flags or its accessor function get_inhibit_flags()), and
|
|
|
5122
|
|
|
5123 (2) if the object to be modified or deleted is not in the
|
|
|
5124 appropriate list.
|
|
|
5125
|
|
|
5126 If so, it signals an error.
|
|
|
5127
|
|
|
5128 Recursive calls to call_trapping_problems() are allowed. In
|
|
|
5129 the case of the two flags mentioned above, the current values
|
|
|
5130 of the global variables are stored in an unwind-protect, and
|
|
|
5131 they're reset to nil.]
|
|
|
5132
|
|
|
5133 If FLAGS contains INHIBIT_ENTERING_DEBUGGER, the debugger will not
|
|
|
5134 be entered if an error occurs inside the Lisp code being called,
|
|
|
5135 even when the user has requested an error. In such case, a warning
|
|
|
5136 is issued stating that access to the debugger is denied, unless
|
|
|
5137 INHIBIT_WARNING_ISSUE has also been supplied. This is useful when
|
|
|
5138 calling Lisp code inside redisplay, in menu callbacks, etc. because
|
|
|
5139 in such cases either the display is in an inconsistent state or
|
|
|
5140 doing window operations is explicitly forbidden by the OS, and the
|
|
|
5141 debugger would causes visual changes on the screen and might create
|
|
|
5142 another frame.
|
|
|
5143
|
|
|
5144 If FLAGS contains INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, no
|
|
|
5145 changes of any sort to extents, faces, glyphs, buffer text,
|
|
|
5146 specifiers relating to display, other variables relating to
|
|
|
5147 display, splitting, deleting, or resizing windows or frames,
|
|
|
5148 deleting buffers, windows, frames, devices, or consoles, etc. is
|
|
|
5149 allowed. This is for things called absolutely in the middle of
|
|
|
5150 redisplay, which expects things to be *exactly* the same after the
|
|
|
5151 call as before. This isn't completely implemented and needs to be
|
|
|
5152 thought out some more to determine exactly what its semantics are.
|
|
|
5153 For the moment, turning on this flag also turns on
|
|
|
5154
|
|
|
5155 INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION
|
|
|
5156 INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION
|
|
|
5157 INHIBIT_ENTERING_DEBUGGER
|
|
|
5158 INHIBIT_WARNING_ISSUE
|
|
|
5159 INHIBIT_GC
|
|
|
5160
|
|
|
5161 #### The following five flags are defined, but unimplemented:
|
|
|
5162
|
|
|
5163 #define INHIBIT_EXISTING_CODING_SYSTEM_DELETION (1<<6)
|
|
|
5164 #define INHIBIT_EXISTING_CHARSET_DELETION (1<<7)
|
|
|
5165 #define INHIBIT_PERMANENT_DISPLAY_OBJECT_CREATION (1<<8)
|
|
|
5166 #define INHIBIT_CODING_SYSTEM_CREATION (1<<9)
|
|
|
5167 #define INHIBIT_CHARSET_CREATION (1<<10)
|
|
|
5168
|
|
|
5169 FLAGS containing CALL_WITH_SUSPENDED_ERRORS is a sign that
|
|
|
5170 call_with_suspended_errors() was invoked. This exists only for
|
|
|
5171 debugging purposes -- often we want to break when a signal happens,
|
|
|
5172 but ignore signals from call_with_suspended_errors(), because they
|
|
|
5173 occur often and for legitimate reasons.
|
|
|
5174
|
|
|
5175 If PROBLEM is non-zero, it should be a pointer to a structure into
|
|
|
5176 which exact information about any occurring problems (either an
|
|
|
5177 error or an attempted throw past this boundary).
|
|
|
5178
|
|
|
5179 If a problem occurred and aborted operation (error, quit, or
|
|
|
5180 invalid throw), Qunbound is returned. Otherwise the return value
|
|
|
5181 from the call to (*fun) (arg) is returned. */
|
|
|
5182
|
|
|
5183 Lisp_Object
|
|
|
5184 call_trapping_problems (Lisp_Object warning_class,
|
|
867
|
5185 const CIbyte *warning_string,
|
|
853
|
5186 int flags,
|
|
|
5187 struct call_trapping_problems_result *problem,
|
|
|
5188 Lisp_Object (*fun) (void *),
|
|
|
5189 void *arg)
|
|
|
5190 {
|
|
1318
|
5191 int speccount = specpdl_depth ();
|
|
853
|
5192 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
5193 struct call_trapping_problems package;
|
|
1333
|
5194 struct call_trapping_problems_result real_problem;
|
|
2532
|
5195 Lisp_Object opaque, thrown_tag, tem, thrown_backtrace;
|
|
853
|
5196 int thrown = 0;
|
|
|
5197
|
|
|
5198 assert (SYMBOLP (warning_class)); /* sanity-check */
|
|
|
5199 assert (!NILP (warning_class));
|
|
|
5200
|
|
|
5201 flags ^= INTERNAL_INHIBIT_ERRORS | INTERNAL_INHIBIT_THROWS;
|
|
|
5202
|
|
|
5203 package.warning_class = warning_class;
|
|
|
5204 package.warning_string = warning_string;
|
|
|
5205 package.fun = fun;
|
|
|
5206 package.arg = arg;
|
|
|
5207 package.catchtag =
|
|
|
5208 flags & INTERNAL_INHIBIT_THROWS ? Vcatch_everything_tag :
|
|
|
5209 flags & INTERNAL_INHIBIT_ERRORS ? make_opaque_ptr (0) :
|
|
|
5210 Qnil;
|
|
|
5211 package.error_conditions = Qnil;
|
|
|
5212 package.data = Qnil;
|
|
|
5213 package.backtrace = Qnil;
|
|
|
5214
|
|
1318
|
5215 flags = set_trapping_problems_flags (flags);
|
|
853
|
5216
|
|
|
5217 if (flags & (INTERNAL_INHIBIT_THROWS | INTERNAL_INHIBIT_ERRORS))
|
|
|
5218 opaque = make_opaque_ptr (&package);
|
|
|
5219 else
|
|
|
5220 opaque = Qnil;
|
|
|
5221
|
|
|
5222 GCPRO5 (package.catchtag, package.error_conditions, package.data,
|
|
|
5223 package.backtrace, opaque);
|
|
|
5224
|
|
|
5225 if (flags & INTERNAL_INHIBIT_ERRORS)
|
|
|
5226 /* We need a catch so that our condition-handler can throw back here
|
|
|
5227 after printing the warning. (We print the warning in the stack
|
|
|
5228 context of the error, so we can get a backtrace.) */
|
|
|
5229 tem = internal_catch (package.catchtag, call_trapping_problems_1, opaque,
|
|
2532
|
5230 &thrown, &thrown_tag, &thrown_backtrace);
|
|
853
|
5231 else if (flags & INTERNAL_INHIBIT_THROWS)
|
|
|
5232 /* We skip over the first wrapper, which traps errors. */
|
|
|
5233 tem = internal_catch (package.catchtag, call_trapping_problems_2, opaque,
|
|
2532
|
5234 &thrown, &thrown_tag, &thrown_backtrace);
|
|
853
|
5235 else
|
|
|
5236 /* Nothing special. */
|
|
|
5237 tem = (fun) (arg);
|
|
|
5238
|
|
1333
|
5239 if (!problem)
|
|
|
5240 problem = &real_problem;
|
|
|
5241
|
|
|
5242 if (!thrown)
|
|
853
|
5243 {
|
|
1333
|
5244 problem->caught_error = 0;
|
|
|
5245 problem->caught_throw = 0;
|
|
|
5246 problem->error_conditions = Qnil;
|
|
|
5247 problem->data = Qnil;
|
|
|
5248 problem->backtrace = Qnil;
|
|
|
5249 problem->thrown_tag = Qnil;
|
|
|
5250 problem->thrown_value = Qnil;
|
|
853
|
5251 }
|
|
1333
|
5252 else if (EQ (thrown_tag, package.catchtag))
|
|
853
|
5253 {
|
|
1333
|
5254 problem->caught_error = 1;
|
|
|
5255 problem->caught_throw = 0;
|
|
|
5256 problem->error_conditions = package.error_conditions;
|
|
|
5257 problem->data = package.data;
|
|
|
5258 problem->backtrace = package.backtrace;
|
|
|
5259 problem->thrown_tag = Qnil;
|
|
|
5260 problem->thrown_value = Qnil;
|
|
853
|
5261 }
|
|
1333
|
5262 else
|
|
|
5263 {
|
|
|
5264 problem->caught_error = 0;
|
|
|
5265 problem->caught_throw = 1;
|
|
|
5266 problem->error_conditions = Qnil;
|
|
|
5267 problem->data = Qnil;
|
|
2532
|
5268 problem->backtrace = thrown_backtrace;
|
|
1333
|
5269 problem->thrown_tag = thrown_tag;
|
|
|
5270 problem->thrown_value = tem;
|
|
|
5271 }
|
|
|
5272
|
|
|
5273 if (!(flags & INHIBIT_WARNING_ISSUE) && !(flags & POSTPONE_WARNING_ISSUE))
|
|
|
5274 issue_call_trapping_problems_warning (warning_class, warning_string,
|
|
|
5275 problem);
|
|
853
|
5276
|
|
|
5277 if (!NILP (package.catchtag) &&
|
|
|
5278 !EQ (package.catchtag, Vcatch_everything_tag))
|
|
|
5279 free_opaque_ptr (package.catchtag);
|
|
|
5280
|
|
|
5281 if (!NILP (opaque))
|
|
|
5282 free_opaque_ptr (opaque);
|
|
|
5283
|
|
|
5284 unbind_to (speccount);
|
|
|
5285 RETURN_UNGCPRO (thrown ? Qunbound : tem);
|
|
|
5286 }
|
|
|
5287
|
|
|
5288 struct va_call_trapping_problems
|
|
|
5289 {
|
|
|
5290 lisp_fn_t fun;
|
|
|
5291 int nargs;
|
|
|
5292 Lisp_Object *args;
|
|
|
5293 };
|
|
|
5294
|
|
|
5295 static Lisp_Object
|
|
|
5296 va_call_trapping_problems_1 (void *ai_mi_madre)
|
|
|
5297 {
|
|
|
5298 struct va_call_trapping_problems *ai_no_corrida =
|
|
|
5299 (struct va_call_trapping_problems *) ai_mi_madre;
|
|
|
5300 Lisp_Object pegar_no_bumbum;
|
|
|
5301
|
|
|
5302 PRIMITIVE_FUNCALL (pegar_no_bumbum, ai_no_corrida->fun,
|
|
|
5303 ai_no_corrida->args, ai_no_corrida->nargs);
|
|
|
5304 return pegar_no_bumbum;
|
|
|
5305 }
|
|
|
5306
|
|
|
5307 /* #### document me. */
|
|
|
5308
|
|
|
5309 Lisp_Object
|
|
|
5310 va_call_trapping_problems (Lisp_Object warning_class,
|
|
867
|
5311 const CIbyte *warning_string,
|
|
853
|
5312 int flags,
|
|
|
5313 struct call_trapping_problems_result *problem,
|
|
|
5314 lisp_fn_t fun, int nargs, ...)
|
|
|
5315 {
|
|
|
5316 va_list vargs;
|
|
|
5317 Lisp_Object args[20];
|
|
|
5318 int i;
|
|
|
5319 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas;
|
|
|
5320 struct gcpro gcpro1;
|
|
|
5321
|
|
|
5322 assert (nargs >= 0 && nargs < 20);
|
|
|
5323
|
|
|
5324 va_start (vargs, nargs);
|
|
|
5325 for (i = 0; i < nargs; i++)
|
|
|
5326 args[i] = va_arg (vargs, Lisp_Object);
|
|
|
5327 va_end (vargs);
|
|
|
5328
|
|
|
5329 fazer_invocacao_atrapalhando_problemas.fun = fun;
|
|
|
5330 fazer_invocacao_atrapalhando_problemas.nargs = nargs;
|
|
|
5331 fazer_invocacao_atrapalhando_problemas.args = args;
|
|
|
5332
|
|
|
5333 GCPRO1_ARRAY (args, nargs);
|
|
|
5334 RETURN_UNGCPRO
|
|
|
5335 (call_trapping_problems
|
|
|
5336 (warning_class, warning_string, flags, problem,
|
|
|
5337 va_call_trapping_problems_1, &fazer_invocacao_atrapalhando_problemas));
|
|
|
5338 }
|
|
|
5339
|
|
|
5340 /* this is an older interface, barely different from
|
|
|
5341 va_call_trapping_problems.
|
|
|
5342
|
|
|
5343 #### eliminate this or at least merge the ERROR_BEHAVIOR stuff into
|
|
|
5344 va_call_trapping_problems(). */
|
|
|
5345
|
|
|
5346 Lisp_Object
|
|
|
5347 call_with_suspended_errors (lisp_fn_t fun, Lisp_Object retval,
|
|
1204
|
5348 Lisp_Object class_, Error_Behavior errb,
|
|
853
|
5349 int nargs, ...)
|
|
|
5350 {
|
|
|
5351 va_list vargs;
|
|
|
5352 Lisp_Object args[20];
|
|
|
5353 int i;
|
|
|
5354 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas;
|
|
|
5355 int flags;
|
|
|
5356 struct gcpro gcpro1;
|
|
|
5357
|
|
1204
|
5358 assert (SYMBOLP (class_)); /* sanity-check */
|
|
|
5359 assert (!NILP (class_));
|
|
853
|
5360 assert (nargs >= 0 && nargs < 20);
|
|
|
5361
|
|
|
5362 va_start (vargs, nargs);
|
|
|
5363 for (i = 0; i < nargs; i++)
|
|
|
5364 args[i] = va_arg (vargs, Lisp_Object);
|
|
|
5365 va_end (vargs);
|
|
|
5366
|
|
|
5367 /* If error-checking is not disabled, just call the function. */
|
|
|
5368
|
|
|
5369 if (ERRB_EQ (errb, ERROR_ME))
|
|
|
5370 {
|
|
|
5371 Lisp_Object val;
|
|
|
5372 PRIMITIVE_FUNCALL (val, fun, args, nargs);
|
|
|
5373 return val;
|
|
|
5374 }
|
|
|
5375
|
|
|
5376 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */
|
|
|
5377 flags = INHIBIT_WARNING_ISSUE | INHIBIT_ENTERING_DEBUGGER;
|
|
|
5378 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN))
|
|
|
5379 flags = ISSUE_WARNINGS_AT_DEBUG_LEVEL | INHIBIT_ENTERING_DEBUGGER;
|
|
|
5380 else
|
|
|
5381 {
|
|
|
5382 assert (ERRB_EQ (errb, ERROR_ME_WARN));
|
|
|
5383 flags = INHIBIT_ENTERING_DEBUGGER;
|
|
|
5384 }
|
|
|
5385
|
|
|
5386 flags |= CALL_WITH_SUSPENDED_ERRORS;
|
|
|
5387
|
|
|
5388 fazer_invocacao_atrapalhando_problemas.fun = fun;
|
|
|
5389 fazer_invocacao_atrapalhando_problemas.nargs = nargs;
|
|
|
5390 fazer_invocacao_atrapalhando_problemas.args = args;
|
|
|
5391
|
|
|
5392 GCPRO1_ARRAY (args, nargs);
|
|
|
5393 {
|
|
|
5394 Lisp_Object its_way_too_goddamn_late =
|
|
|
5395 call_trapping_problems
|
|
1204
|
5396 (class_, 0, flags, 0, va_call_trapping_problems_1,
|
|
853
|
5397 &fazer_invocacao_atrapalhando_problemas);
|
|
|
5398 UNGCPRO;
|
|
|
5399 if (UNBOUNDP (its_way_too_goddamn_late))
|
|
|
5400 return retval;
|
|
|
5401 else
|
|
|
5402 return its_way_too_goddamn_late;
|
|
|
5403 }
|
|
|
5404 }
|
|
|
5405
|
|
|
5406 struct calln_trapping_problems
|
|
|
5407 {
|
|
|
5408 int nargs;
|
|
|
5409 Lisp_Object *args;
|
|
|
5410 };
|
|
|
5411
|
|
|
5412 static Lisp_Object
|
|
|
5413 calln_trapping_problems_1 (void *puta)
|
|
|
5414 {
|
|
|
5415 struct calln_trapping_problems *p = (struct calln_trapping_problems *) puta;
|
|
|
5416
|
|
|
5417 return Ffuncall (p->nargs, p->args);
|
|
428
|
5418 }
|
|
|
5419
|
|
|
5420 static Lisp_Object
|
|
853
|
5421 calln_trapping_problems (Lisp_Object warning_class,
|
|
867
|
5422 const CIbyte *warning_string, int flags,
|
|
853
|
5423 struct call_trapping_problems_result *problem,
|
|
|
5424 int nargs, Lisp_Object *args)
|
|
|
5425 {
|
|
|
5426 struct calln_trapping_problems foo;
|
|
|
5427 struct gcpro gcpro1;
|
|
|
5428
|
|
|
5429 if (SYMBOLP (args[0]))
|
|
|
5430 {
|
|
|
5431 Lisp_Object tem = XSYMBOL (args[0])->function;
|
|
|
5432 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
5433 {
|
|
|
5434 if (problem)
|
|
|
5435 {
|
|
|
5436 problem->caught_error = 0;
|
|
|
5437 problem->caught_throw = 0;
|
|
|
5438 problem->error_conditions = Qnil;
|
|
|
5439 problem->data = Qnil;
|
|
|
5440 problem->backtrace = Qnil;
|
|
|
5441 problem->thrown_tag = Qnil;
|
|
|
5442 problem->thrown_value = Qnil;
|
|
|
5443 }
|
|
|
5444 return Qnil;
|
|
|
5445 }
|
|
|
5446 }
|
|
|
5447
|
|
|
5448 foo.nargs = nargs;
|
|
|
5449 foo.args = args;
|
|
|
5450
|
|
|
5451 GCPRO1_ARRAY (args, nargs);
|
|
|
5452 RETURN_UNGCPRO (call_trapping_problems (warning_class, warning_string,
|
|
|
5453 flags, problem,
|
|
|
5454 calln_trapping_problems_1,
|
|
|
5455 &foo));
|
|
|
5456 }
|
|
|
5457
|
|
|
5458 /* #### fix these functions to follow the calling convention of
|
|
|
5459 call_trapping_problems! */
|
|
|
5460
|
|
|
5461 Lisp_Object
|
|
867
|
5462 call0_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5463 int flags)
|
|
|
5464 {
|
|
|
5465 return calln_trapping_problems (Qerror, warning_string, flags, 0, 1,
|
|
|
5466 &function);
|
|
428
|
5467 }
|
|
|
5468
|
|
|
5469 Lisp_Object
|
|
867
|
5470 call1_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5471 Lisp_Object object, int flags)
|
|
|
5472 {
|
|
|
5473 Lisp_Object args[2];
|
|
|
5474
|
|
|
5475 args[0] = function;
|
|
|
5476 args[1] = object;
|
|
|
5477
|
|
|
5478 return calln_trapping_problems (Qerror, warning_string, flags, 0, 2,
|
|
|
5479 args);
|
|
|
5480 }
|
|
|
5481
|
|
|
5482 Lisp_Object
|
|
867
|
5483 call2_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5484 Lisp_Object object1, Lisp_Object object2,
|
|
|
5485 int flags)
|
|
|
5486 {
|
|
|
5487 Lisp_Object args[3];
|
|
|
5488
|
|
|
5489 args[0] = function;
|
|
|
5490 args[1] = object1;
|
|
|
5491 args[2] = object2;
|
|
|
5492
|
|
|
5493 return calln_trapping_problems (Qerror, warning_string, flags, 0, 3,
|
|
|
5494 args);
|
|
|
5495 }
|
|
|
5496
|
|
|
5497 Lisp_Object
|
|
867
|
5498 call3_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5499 Lisp_Object object1, Lisp_Object object2,
|
|
|
5500 Lisp_Object object3, int flags)
|
|
|
5501 {
|
|
|
5502 Lisp_Object args[4];
|
|
|
5503
|
|
|
5504 args[0] = function;
|
|
|
5505 args[1] = object1;
|
|
|
5506 args[2] = object2;
|
|
|
5507 args[3] = object3;
|
|
|
5508
|
|
|
5509 return calln_trapping_problems (Qerror, warning_string, flags, 0, 4,
|
|
|
5510 args);
|
|
|
5511 }
|
|
|
5512
|
|
|
5513 Lisp_Object
|
|
867
|
5514 call4_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5515 Lisp_Object object1, Lisp_Object object2,
|
|
|
5516 Lisp_Object object3, Lisp_Object object4,
|
|
|
5517 int flags)
|
|
|
5518 {
|
|
|
5519 Lisp_Object args[5];
|
|
|
5520
|
|
|
5521 args[0] = function;
|
|
|
5522 args[1] = object1;
|
|
|
5523 args[2] = object2;
|
|
|
5524 args[3] = object3;
|
|
|
5525 args[4] = object4;
|
|
|
5526
|
|
|
5527 return calln_trapping_problems (Qerror, warning_string, flags, 0, 5,
|
|
|
5528 args);
|
|
|
5529 }
|
|
|
5530
|
|
|
5531 Lisp_Object
|
|
867
|
5532 call5_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5533 Lisp_Object object1, Lisp_Object object2,
|
|
|
5534 Lisp_Object object3, Lisp_Object object4,
|
|
|
5535 Lisp_Object object5, int flags)
|
|
|
5536 {
|
|
|
5537 Lisp_Object args[6];
|
|
|
5538
|
|
|
5539 args[0] = function;
|
|
|
5540 args[1] = object1;
|
|
|
5541 args[2] = object2;
|
|
|
5542 args[3] = object3;
|
|
|
5543 args[4] = object4;
|
|
|
5544 args[5] = object5;
|
|
|
5545
|
|
|
5546 return calln_trapping_problems (Qerror, warning_string, flags, 0, 6,
|
|
|
5547 args);
|
|
|
5548 }
|
|
|
5549
|
|
|
5550 struct eval_in_buffer_trapping_problems
|
|
|
5551 {
|
|
|
5552 struct buffer *buf;
|
|
|
5553 Lisp_Object form;
|
|
|
5554 };
|
|
|
5555
|
|
|
5556 static Lisp_Object
|
|
|
5557 eval_in_buffer_trapping_problems_1 (void *arg)
|
|
|
5558 {
|
|
|
5559 struct eval_in_buffer_trapping_problems *p =
|
|
|
5560 (struct eval_in_buffer_trapping_problems *) arg;
|
|
|
5561
|
|
|
5562 return eval_in_buffer (p->buf, p->form);
|
|
|
5563 }
|
|
|
5564
|
|
|
5565 /* #### fix these functions to follow the calling convention of
|
|
|
5566 call_trapping_problems! */
|
|
|
5567
|
|
|
5568 Lisp_Object
|
|
867
|
5569 eval_in_buffer_trapping_problems (const CIbyte *warning_string,
|
|
853
|
5570 struct buffer *buf, Lisp_Object form,
|
|
|
5571 int flags)
|
|
|
5572 {
|
|
|
5573 struct eval_in_buffer_trapping_problems p;
|
|
|
5574 Lisp_Object buffer = wrap_buffer (buf);
|
|
428
|
5575 struct gcpro gcpro1, gcpro2;
|
|
|
5576
|
|
853
|
5577 GCPRO2 (buffer, form);
|
|
|
5578 p.buf = buf;
|
|
|
5579 p.form = form;
|
|
|
5580 RETURN_UNGCPRO (call_trapping_problems (Qerror, warning_string, flags, 0,
|
|
|
5581 eval_in_buffer_trapping_problems_1,
|
|
|
5582 &p));
|
|
|
5583 }
|
|
|
5584
|
|
|
5585 Lisp_Object
|
|
1333
|
5586 run_hook_trapping_problems (Lisp_Object warning_class,
|
|
853
|
5587 Lisp_Object hook_symbol,
|
|
|
5588 int flags)
|
|
|
5589 {
|
|
1333
|
5590 return run_hook_with_args_trapping_problems (warning_class, 1, &hook_symbol,
|
|
853
|
5591 RUN_HOOKS_TO_COMPLETION,
|
|
|
5592 flags);
|
|
428
|
5593 }
|
|
|
5594
|
|
|
5595 static Lisp_Object
|
|
853
|
5596 safe_run_hook_trapping_problems_1 (void *puta)
|
|
|
5597 {
|
|
|
5598 Lisp_Object hook = VOID_TO_LISP (puta);
|
|
|
5599
|
|
|
5600 run_hook (hook);
|
|
428
|
5601 return Qnil;
|
|
|
5602 }
|
|
|
5603
|
|
853
|
5604 /* Same as run_hook_trapping_problems() but also set the hook to nil
|
|
|
5605 if an error occurs (but not a quit). */
|
|
|
5606
|
|
428
|
5607 Lisp_Object
|
|
1333
|
5608 safe_run_hook_trapping_problems (Lisp_Object warning_class,
|
|
|
5609 Lisp_Object hook_symbol, int flags)
|
|
853
|
5610 {
|
|
428
|
5611 Lisp_Object tem;
|
|
853
|
5612 struct gcpro gcpro1, gcpro2;
|
|
|
5613 struct call_trapping_problems_result prob;
|
|
428
|
5614
|
|
|
5615 if (!initialized || preparing_for_armageddon)
|
|
|
5616 return Qnil;
|
|
|
5617 tem = find_symbol_value (hook_symbol);
|
|
|
5618 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
5619 return Qnil;
|
|
|
5620
|
|
853
|
5621 GCPRO2 (hook_symbol, tem);
|
|
1333
|
5622 tem = call_trapping_problems (Qerror, NULL,
|
|
|
5623 flags | POSTPONE_WARNING_ISSUE,
|
|
853
|
5624 &prob,
|
|
|
5625 safe_run_hook_trapping_problems_1,
|
|
|
5626 LISP_TO_VOID (hook_symbol));
|
|
1333
|
5627 {
|
|
|
5628 Lisp_Object hook_name = XSYMBOL_NAME (hook_symbol);
|
|
|
5629 Ibyte *hook_str = XSTRING_DATA (hook_name);
|
|
|
5630 Ibyte *err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100);
|
|
|
5631
|
|
|
5632 if (prob.caught_throw || (prob.caught_error && !EQ (prob.error_conditions,
|
|
|
5633 Qquit)))
|
|
|
5634 {
|
|
|
5635 Fset (hook_symbol, Qnil);
|
|
|
5636 qxesprintf (err, "Error in `%s' (resetting to nil)", hook_str);
|
|
|
5637 }
|
|
|
5638 else
|
|
|
5639 qxesprintf (err, "Quit in `%s'", hook_str);
|
|
|
5640
|
|
|
5641
|
|
|
5642 issue_call_trapping_problems_warning (warning_class, (CIbyte *) err,
|
|
|
5643 &prob);
|
|
|
5644 }
|
|
|
5645
|
|
|
5646 UNGCPRO;
|
|
|
5647 return tem;
|
|
853
|
5648 }
|
|
|
5649
|
|
|
5650 struct run_hook_with_args_in_buffer_trapping_problems
|
|
|
5651 {
|
|
|
5652 struct buffer *buf;
|
|
|
5653 int nargs;
|
|
|
5654 Lisp_Object *args;
|
|
|
5655 enum run_hooks_condition cond;
|
|
|
5656 };
|
|
|
5657
|
|
|
5658 static Lisp_Object
|
|
|
5659 run_hook_with_args_in_buffer_trapping_problems_1 (void *puta)
|
|
|
5660 {
|
|
|
5661 struct run_hook_with_args_in_buffer_trapping_problems *porra =
|
|
|
5662 (struct run_hook_with_args_in_buffer_trapping_problems *) puta;
|
|
|
5663
|
|
|
5664 return run_hook_with_args_in_buffer (porra->buf, porra->nargs, porra->args,
|
|
|
5665 porra->cond);
|
|
|
5666 }
|
|
|
5667
|
|
|
5668 /* #### fix these functions to follow the calling convention of
|
|
|
5669 call_trapping_problems! */
|
|
428
|
5670
|
|
|
5671 Lisp_Object
|
|
1333
|
5672 run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class,
|
|
853
|
5673 struct buffer *buf, int nargs,
|
|
|
5674 Lisp_Object *args,
|
|
|
5675 enum run_hooks_condition cond,
|
|
|
5676 int flags)
|
|
|
5677 {
|
|
|
5678 Lisp_Object sym, val, ret;
|
|
|
5679 struct run_hook_with_args_in_buffer_trapping_problems diversity_and_distrust;
|
|
428
|
5680 struct gcpro gcpro1;
|
|
1333
|
5681 Lisp_Object hook_name;
|
|
|
5682 Ibyte *hook_str;
|
|
|
5683 Ibyte *err;
|
|
428
|
5684
|
|
|
5685 if (!initialized || preparing_for_armageddon)
|
|
853
|
5686 /* We need to bail out of here pronto. */
|
|
428
|
5687 return Qnil;
|
|
|
5688
|
|
853
|
5689 GCPRO1_ARRAY (args, nargs);
|
|
|
5690
|
|
|
5691 sym = args[0];
|
|
|
5692 val = symbol_value_in_buffer (sym, wrap_buffer (buf));
|
|
|
5693 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil);
|
|
|
5694
|
|
|
5695 if (UNBOUNDP (val) || NILP (val))
|
|
|
5696 RETURN_UNGCPRO (ret);
|
|
|
5697
|
|
|
5698 diversity_and_distrust.buf = buf;
|
|
|
5699 diversity_and_distrust.nargs = nargs;
|
|
|
5700 diversity_and_distrust.args = args;
|
|
|
5701 diversity_and_distrust.cond = cond;
|
|
|
5702
|
|
1333
|
5703 hook_name = XSYMBOL_NAME (args[0]);
|
|
|
5704 hook_str = XSTRING_DATA (hook_name);
|
|
|
5705 err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100);
|
|
|
5706 qxesprintf (err, "Error in `%s'", hook_str);
|
|
853
|
5707 RETURN_UNGCPRO
|
|
|
5708 (call_trapping_problems
|
|
1333
|
5709 (warning_class, (CIbyte *) err, flags, 0,
|
|
853
|
5710 run_hook_with_args_in_buffer_trapping_problems_1,
|
|
|
5711 &diversity_and_distrust));
|
|
428
|
5712 }
|
|
|
5713
|
|
|
5714 Lisp_Object
|
|
1333
|
5715 run_hook_with_args_trapping_problems (Lisp_Object warning_class,
|
|
853
|
5716 int nargs,
|
|
|
5717 Lisp_Object *args,
|
|
|
5718 enum run_hooks_condition cond,
|
|
|
5719 int flags)
|
|
|
5720 {
|
|
|
5721 return run_hook_with_args_in_buffer_trapping_problems
|
|
1333
|
5722 (warning_class, current_buffer, nargs, args, cond, flags);
|
|
428
|
5723 }
|
|
|
5724
|
|
|
5725 Lisp_Object
|
|
1333
|
5726 va_run_hook_with_args_trapping_problems (Lisp_Object warning_class,
|
|
853
|
5727 Lisp_Object hook_var,
|
|
|
5728 int nargs, ...)
|
|
|
5729 {
|
|
|
5730 /* This function can GC */
|
|
|
5731 struct gcpro gcpro1;
|
|
|
5732 int i;
|
|
|
5733 va_list vargs;
|
|
|
5734 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
5735 int flags;
|
|
|
5736
|
|
|
5737 va_start (vargs, nargs);
|
|
|
5738 funcall_args[0] = hook_var;
|
|
|
5739 for (i = 0; i < nargs; i++)
|
|
|
5740 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
5741 flags = va_arg (vargs, int);
|
|
|
5742 va_end (vargs);
|
|
|
5743
|
|
|
5744 GCPRO1_ARRAY (funcall_args, nargs + 1);
|
|
|
5745 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems
|
|
1333
|
5746 (warning_class, current_buffer, nargs + 1, funcall_args,
|
|
853
|
5747 RUN_HOOKS_TO_COMPLETION, flags));
|
|
428
|
5748 }
|
|
|
5749
|
|
|
5750 Lisp_Object
|
|
1333
|
5751 va_run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class,
|
|
853
|
5752 struct buffer *buf,
|
|
|
5753 Lisp_Object hook_var,
|
|
|
5754 int nargs, ...)
|
|
|
5755 {
|
|
|
5756 /* This function can GC */
|
|
|
5757 struct gcpro gcpro1;
|
|
|
5758 int i;
|
|
|
5759 va_list vargs;
|
|
|
5760 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
5761 int flags;
|
|
|
5762
|
|
|
5763 va_start (vargs, nargs);
|
|
|
5764 funcall_args[0] = hook_var;
|
|
|
5765 for (i = 0; i < nargs; i++)
|
|
|
5766 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
5767 flags = va_arg (vargs, int);
|
|
|
5768 va_end (vargs);
|
|
|
5769
|
|
|
5770 GCPRO1_ARRAY (funcall_args, nargs + 1);
|
|
|
5771 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems
|
|
1333
|
5772 (warning_class, buf, nargs + 1, funcall_args,
|
|
853
|
5773 RUN_HOOKS_TO_COMPLETION, flags));
|
|
428
|
5774 }
|
|
|
5775
|
|
|
5776
|
|
|
5777 /************************************************************************/
|
|
|
5778 /* The special binding stack */
|
|
771
|
5779 /* Most C code should simply use specbind() and unbind_to_1(). */
|
|
428
|
5780 /* When performance is critical, use the macros in backtrace.h. */
|
|
|
5781 /************************************************************************/
|
|
|
5782
|
|
|
5783 #define min_max_specpdl_size 400
|
|
|
5784
|
|
|
5785 void
|
|
647
|
5786 grow_specpdl (EMACS_INT reserved)
|
|
|
5787 {
|
|
|
5788 EMACS_INT size_needed = specpdl_depth() + reserved;
|
|
428
|
5789 if (size_needed >= max_specpdl_size)
|
|
|
5790 {
|
|
|
5791 if (max_specpdl_size < min_max_specpdl_size)
|
|
|
5792 max_specpdl_size = min_max_specpdl_size;
|
|
|
5793 if (size_needed >= max_specpdl_size)
|
|
|
5794 {
|
|
1951
|
5795 /* Leave room for some specpdl in the debugger. */
|
|
|
5796 max_specpdl_size = size_needed + 100;
|
|
|
5797 if (max_specpdl_size > specpdl_size)
|
|
|
5798 {
|
|
|
5799 specpdl_size = max_specpdl_size;
|
|
|
5800 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size);
|
|
|
5801 specpdl_ptr = specpdl + specpdl_depth();
|
|
|
5802 }
|
|
563
|
5803 signal_continuable_error
|
|
|
5804 (Qstack_overflow,
|
|
|
5805 "Variable binding depth exceeds max-specpdl-size", Qunbound);
|
|
428
|
5806 }
|
|
|
5807 }
|
|
|
5808 while (specpdl_size < size_needed)
|
|
|
5809 {
|
|
|
5810 specpdl_size *= 2;
|
|
|
5811 if (specpdl_size > max_specpdl_size)
|
|
|
5812 specpdl_size = max_specpdl_size;
|
|
|
5813 }
|
|
|
5814 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size);
|
|
|
5815 specpdl_ptr = specpdl + specpdl_depth();
|
|
853
|
5816 check_specbind_stack_sanity ();
|
|
428
|
5817 }
|
|
|
5818
|
|
|
5819
|
|
|
5820 /* Handle unbinding buffer-local variables */
|
|
|
5821 static Lisp_Object
|
|
|
5822 specbind_unwind_local (Lisp_Object ovalue)
|
|
|
5823 {
|
|
|
5824 Lisp_Object current = Fcurrent_buffer ();
|
|
|
5825 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
853
|
5826 Lisp_Object victim = ovalue;
|
|
|
5827 Lisp_Object buf = get_buffer (XCAR (victim), 0);
|
|
|
5828 ovalue = XCDR (victim);
|
|
428
|
5829
|
|
|
5830 free_cons (victim);
|
|
|
5831
|
|
|
5832 if (NILP (buf))
|
|
|
5833 {
|
|
|
5834 /* Deleted buffer -- do nothing */
|
|
|
5835 }
|
|
|
5836 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0)
|
|
|
5837 {
|
|
|
5838 /* Was buffer-local when binding was made, now no longer is.
|
|
|
5839 * (kill-local-variable can do this.)
|
|
|
5840 * Do nothing in this case.
|
|
|
5841 */
|
|
|
5842 }
|
|
|
5843 else if (EQ (buf, current))
|
|
|
5844 Fset (symbol, ovalue);
|
|
|
5845 else
|
|
|
5846 {
|
|
|
5847 /* Urk! Somebody switched buffers */
|
|
|
5848 struct gcpro gcpro1;
|
|
|
5849 GCPRO1 (current);
|
|
|
5850 Fset_buffer (buf);
|
|
|
5851 Fset (symbol, ovalue);
|
|
|
5852 Fset_buffer (current);
|
|
|
5853 UNGCPRO;
|
|
|
5854 }
|
|
|
5855 return symbol;
|
|
|
5856 }
|
|
|
5857
|
|
|
5858 static Lisp_Object
|
|
|
5859 specbind_unwind_wasnt_local (Lisp_Object buffer)
|
|
|
5860 {
|
|
|
5861 Lisp_Object current = Fcurrent_buffer ();
|
|
|
5862 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
5863
|
|
|
5864 buffer = get_buffer (buffer, 0);
|
|
|
5865 if (NILP (buffer))
|
|
|
5866 {
|
|
|
5867 /* Deleted buffer -- do nothing */
|
|
|
5868 }
|
|
|
5869 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0)
|
|
|
5870 {
|
|
|
5871 /* Was buffer-local when binding was made, now no longer is.
|
|
|
5872 * (kill-local-variable can do this.)
|
|
|
5873 * Do nothing in this case.
|
|
|
5874 */
|
|
|
5875 }
|
|
|
5876 else if (EQ (buffer, current))
|
|
|
5877 Fkill_local_variable (symbol);
|
|
|
5878 else
|
|
|
5879 {
|
|
|
5880 /* Urk! Somebody switched buffers */
|
|
|
5881 struct gcpro gcpro1;
|
|
|
5882 GCPRO1 (current);
|
|
|
5883 Fset_buffer (buffer);
|
|
|
5884 Fkill_local_variable (symbol);
|
|
|
5885 Fset_buffer (current);
|
|
|
5886 UNGCPRO;
|
|
|
5887 }
|
|
|
5888 return symbol;
|
|
|
5889 }
|
|
|
5890
|
|
|
5891
|
|
|
5892 void
|
|
|
5893 specbind (Lisp_Object symbol, Lisp_Object value)
|
|
|
5894 {
|
|
|
5895 SPECBIND (symbol, value);
|
|
853
|
5896
|
|
|
5897 check_specbind_stack_sanity ();
|
|
428
|
5898 }
|
|
|
5899
|
|
|
5900 void
|
|
|
5901 specbind_magic (Lisp_Object symbol, Lisp_Object value)
|
|
|
5902 {
|
|
|
5903 int buffer_local =
|
|
|
5904 symbol_value_buffer_local_info (symbol, current_buffer);
|
|
|
5905
|
|
|
5906 if (buffer_local == 0)
|
|
|
5907 {
|
|
|
5908 specpdl_ptr->old_value = find_symbol_value (symbol);
|
|
771
|
5909 specpdl_ptr->func = 0; /* Handled specially by unbind_to_1 */
|
|
428
|
5910 }
|
|
|
5911 else if (buffer_local > 0)
|
|
|
5912 {
|
|
|
5913 /* Already buffer-local */
|
|
|
5914 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (),
|
|
|
5915 find_symbol_value (symbol));
|
|
|
5916 specpdl_ptr->func = specbind_unwind_local;
|
|
|
5917 }
|
|
|
5918 else
|
|
|
5919 {
|
|
|
5920 /* About to become buffer-local */
|
|
|
5921 specpdl_ptr->old_value = Fcurrent_buffer ();
|
|
|
5922 specpdl_ptr->func = specbind_unwind_wasnt_local;
|
|
|
5923 }
|
|
|
5924
|
|
|
5925 specpdl_ptr->symbol = symbol;
|
|
|
5926 specpdl_ptr++;
|
|
|
5927 specpdl_depth_counter++;
|
|
|
5928
|
|
|
5929 Fset (symbol, value);
|
|
853
|
5930
|
|
|
5931 check_specbind_stack_sanity ();
|
|
428
|
5932 }
|
|
|
5933
|
|
771
|
5934 /* Record an unwind-protect -- FUNCTION will be called with ARG no matter
|
|
|
5935 whether a normal or non-local exit occurs. (You need to call unbind_to_1()
|
|
|
5936 before your function returns normally, passing in the integer returned
|
|
|
5937 by this function.) Note: As long as the unwind-protect exists, ARG is
|
|
|
5938 automatically GCPRO'd. The return value from FUNCTION is completely
|
|
|
5939 ignored. #### We should eliminate it entirely. */
|
|
|
5940
|
|
|
5941 int
|
|
428
|
5942 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg),
|
|
|
5943 Lisp_Object arg)
|
|
|
5944 {
|
|
|
5945 SPECPDL_RESERVE (1);
|
|
|
5946 specpdl_ptr->func = function;
|
|
|
5947 specpdl_ptr->symbol = Qnil;
|
|
|
5948 specpdl_ptr->old_value = arg;
|
|
|
5949 specpdl_ptr++;
|
|
|
5950 specpdl_depth_counter++;
|
|
853
|
5951 check_specbind_stack_sanity ();
|
|
771
|
5952 return specpdl_depth_counter - 1;
|
|
|
5953 }
|
|
|
5954
|
|
|
5955 static Lisp_Object
|
|
802
|
5956 restore_lisp_object (Lisp_Object cons)
|
|
|
5957 {
|
|
|
5958 Lisp_Object opaque = XCAR (cons);
|
|
|
5959 Lisp_Object *addr = (Lisp_Object *) get_opaque_ptr (opaque);
|
|
|
5960 *addr = XCDR (cons);
|
|
|
5961 free_opaque_ptr (opaque);
|
|
853
|
5962 free_cons (cons);
|
|
802
|
5963 return Qnil;
|
|
|
5964 }
|
|
|
5965
|
|
|
5966 /* Establish an unwind-protect which will restore the Lisp_Object pointed to
|
|
|
5967 by ADDR with the value VAL. */
|
|
814
|
5968 static int
|
|
802
|
5969 record_unwind_protect_restoring_lisp_object (Lisp_Object *addr,
|
|
|
5970 Lisp_Object val)
|
|
|
5971 {
|
|
|
5972 Lisp_Object opaque = make_opaque_ptr (addr);
|
|
|
5973 return record_unwind_protect (restore_lisp_object,
|
|
|
5974 noseeum_cons (opaque, val));
|
|
|
5975 }
|
|
|
5976
|
|
|
5977 /* Similar to specbind() but for any C variable whose value is a
|
|
|
5978 Lisp_Object. Sets up an unwind-protect to restore the variable
|
|
|
5979 pointed to by ADDR to its existing value, and then changes its
|
|
|
5980 value to NEWVAL. Returns the previous value of specpdl_depth();
|
|
|
5981 pass this to unbind_to() after you are done. */
|
|
|
5982 int
|
|
|
5983 internal_bind_lisp_object (Lisp_Object *addr, Lisp_Object newval)
|
|
|
5984 {
|
|
|
5985 int count = specpdl_depth ();
|
|
|
5986 record_unwind_protect_restoring_lisp_object (addr, *addr);
|
|
|
5987 *addr = newval;
|
|
|
5988 return count;
|
|
|
5989 }
|
|
|
5990
|
|
|
5991 static Lisp_Object
|
|
|
5992 restore_int (Lisp_Object cons)
|
|
|
5993 {
|
|
|
5994 Lisp_Object opaque = XCAR (cons);
|
|
|
5995 Lisp_Object lval = XCDR (cons);
|
|
|
5996 int *addr = (int *) get_opaque_ptr (opaque);
|
|
|
5997 int val;
|
|
|
5998
|
|
|
5999 if (INTP (lval))
|
|
|
6000 val = XINT (lval);
|
|
|
6001 else
|
|
|
6002 {
|
|
|
6003 val = (int) get_opaque_ptr (lval);
|
|
|
6004 free_opaque_ptr (lval);
|
|
|
6005 }
|
|
|
6006
|
|
|
6007 *addr = val;
|
|
|
6008 free_opaque_ptr (opaque);
|
|
853
|
6009 free_cons (cons);
|
|
802
|
6010 return Qnil;
|
|
|
6011 }
|
|
|
6012
|
|
|
6013 /* Establish an unwind-protect which will restore the int pointed to
|
|
|
6014 by ADDR with the value VAL. This function works correctly with
|
|
|
6015 all ints, even those that don't fit into a Lisp integer. */
|
|
1333
|
6016 int
|
|
802
|
6017 record_unwind_protect_restoring_int (int *addr, int val)
|
|
|
6018 {
|
|
|
6019 Lisp_Object opaque = make_opaque_ptr (addr);
|
|
|
6020 Lisp_Object lval;
|
|
|
6021
|
|
|
6022 if (NUMBER_FITS_IN_AN_EMACS_INT (val))
|
|
|
6023 lval = make_int (val);
|
|
|
6024 else
|
|
|
6025 lval = make_opaque_ptr ((void *) val);
|
|
|
6026 return record_unwind_protect (restore_int, noseeum_cons (opaque, lval));
|
|
|
6027 }
|
|
|
6028
|
|
|
6029 /* Similar to specbind() but for any C variable whose value is an int.
|
|
|
6030 Sets up an unwind-protect to restore the variable pointed to by
|
|
|
6031 ADDR to its existing value, and then changes its value to NEWVAL.
|
|
|
6032 Returns the previous value of specpdl_depth(); pass this to
|
|
|
6033 unbind_to() after you are done. This function works correctly with
|
|
|
6034 all ints, even those that don't fit into a Lisp integer. */
|
|
|
6035 int
|
|
|
6036 internal_bind_int (int *addr, int newval)
|
|
|
6037 {
|
|
|
6038 int count = specpdl_depth ();
|
|
|
6039 record_unwind_protect_restoring_int (addr, *addr);
|
|
|
6040 *addr = newval;
|
|
|
6041 return count;
|
|
|
6042 }
|
|
|
6043
|
|
|
6044 static Lisp_Object
|
|
771
|
6045 free_pointer (Lisp_Object opaque)
|
|
|
6046 {
|
|
1726
|
6047 xfree (get_opaque_ptr (opaque), void *);
|
|
771
|
6048 free_opaque_ptr (opaque);
|
|
|
6049 return Qnil;
|
|
|
6050 }
|
|
|
6051
|
|
|
6052 /* Establish an unwind-protect which will free the specified block.
|
|
|
6053 */
|
|
|
6054 int
|
|
|
6055 record_unwind_protect_freeing (void *ptr)
|
|
|
6056 {
|
|
|
6057 Lisp_Object opaque = make_opaque_ptr (ptr);
|
|
|
6058 return record_unwind_protect (free_pointer, opaque);
|
|
|
6059 }
|
|
|
6060
|
|
|
6061 static Lisp_Object
|
|
|
6062 free_dynarr (Lisp_Object opaque)
|
|
|
6063 {
|
|
|
6064 Dynarr_free (get_opaque_ptr (opaque));
|
|
|
6065 free_opaque_ptr (opaque);
|
|
|
6066 return Qnil;
|
|
|
6067 }
|
|
|
6068
|
|
|
6069 int
|
|
|
6070 record_unwind_protect_freeing_dynarr (void *ptr)
|
|
|
6071 {
|
|
|
6072 Lisp_Object opaque = make_opaque_ptr (ptr);
|
|
|
6073 return record_unwind_protect (free_dynarr, opaque);
|
|
|
6074 }
|
|
428
|
6075
|
|
|
6076 /* Unwind the stack till specpdl_depth() == COUNT.
|
|
|
6077 VALUE is not used, except that, purely as a convenience to the
|
|
771
|
6078 caller, it is protected from garbage-protection and returned. */
|
|
428
|
6079 Lisp_Object
|
|
771
|
6080 unbind_to_1 (int count, Lisp_Object value)
|
|
428
|
6081 {
|
|
|
6082 UNBIND_TO_GCPRO (count, value);
|
|
853
|
6083 check_specbind_stack_sanity ();
|
|
428
|
6084 return value;
|
|
|
6085 }
|
|
|
6086
|
|
|
6087 /* Don't call this directly.
|
|
|
6088 Only for use by UNBIND_TO* macros in backtrace.h */
|
|
|
6089 void
|
|
|
6090 unbind_to_hairy (int count)
|
|
|
6091 {
|
|
442
|
6092 ++specpdl_ptr;
|
|
|
6093 ++specpdl_depth_counter;
|
|
|
6094
|
|
428
|
6095 while (specpdl_depth_counter != count)
|
|
|
6096 {
|
|
1313
|
6097 Lisp_Object oquit = Qunbound;
|
|
|
6098
|
|
|
6099 /* Do this check BEFORE decrementing the values below, because once
|
|
|
6100 they're decremented, GC protection is lost on
|
|
|
6101 specpdl_ptr->old_value. */
|
|
1322
|
6102 if (specpdl_ptr[-1].func == Fprogn)
|
|
1313
|
6103 {
|
|
|
6104 /* Allow QUIT within unwind-protect routines, but defer any
|
|
|
6105 existing QUIT until afterwards. Only do this, however, for
|
|
|
6106 unwind-protects established by Lisp code, not by C code
|
|
|
6107 (e.g. free_opaque_ptr() or something), because the act of
|
|
|
6108 checking for QUIT can cause all sorts of weird things to
|
|
|
6109 happen, since it churns the event loop -- redisplay, running
|
|
|
6110 Lisp, etc. Code should not have to worry about this just
|
|
|
6111 because of establishing an unwind-protect. */
|
|
|
6112 check_quit (); /* make Vquit_flag accurate */
|
|
|
6113 oquit = Vquit_flag;
|
|
|
6114 Vquit_flag = Qnil;
|
|
|
6115 }
|
|
|
6116
|
|
428
|
6117 --specpdl_ptr;
|
|
|
6118 --specpdl_depth_counter;
|
|
|
6119
|
|
1313
|
6120 /* #### At this point, there is no GC protection on old_value. This
|
|
|
6121 could be a real problem, depending on what unwind-protect function
|
|
|
6122 is called. It looks like it just so happens that the ones
|
|
|
6123 actually called don't have a problem with this, e.g. Fprogn. But
|
|
|
6124 we should look into fixing this. (Many unwind-protect functions
|
|
|
6125 free values. Is it a problem if freed values are
|
|
|
6126 GC-protected?) */
|
|
428
|
6127 if (specpdl_ptr->func != 0)
|
|
1313
|
6128 {
|
|
|
6129 /* An unwind-protect */
|
|
|
6130 (*specpdl_ptr->func) (specpdl_ptr->old_value);
|
|
|
6131 }
|
|
|
6132
|
|
428
|
6133 else
|
|
|
6134 {
|
|
|
6135 /* We checked symbol for validity when we specbound it,
|
|
|
6136 so only need to call Fset if symbol has magic value. */
|
|
440
|
6137 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol);
|
|
428
|
6138 if (!SYMBOL_VALUE_MAGIC_P (sym->value))
|
|
|
6139 sym->value = specpdl_ptr->old_value;
|
|
|
6140 else
|
|
|
6141 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value);
|
|
|
6142 }
|
|
|
6143
|
|
|
6144 #if 0 /* martin */
|
|
|
6145 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE
|
|
|
6146 /* There should never be anything here for us to remove.
|
|
|
6147 If so, it indicates a logic error in Emacs. Catches
|
|
|
6148 should get removed when a throw or signal occurs, or
|
|
|
6149 when a catch or condition-case exits normally. But
|
|
|
6150 it's too dangerous to just remove this code. --ben */
|
|
|
6151
|
|
|
6152 /* Furthermore, this code is not in FSFmacs!!!
|
|
|
6153 Braino on mly's part? */
|
|
|
6154 /* If we're unwound past the pdlcount of a catch frame,
|
|
|
6155 that catch can't possibly still be valid. */
|
|
|
6156 while (catchlist && catchlist->pdlcount > specpdl_depth_counter)
|
|
|
6157 {
|
|
|
6158 catchlist = catchlist->next;
|
|
|
6159 /* Don't mess with gcprolist, backtrace_list here */
|
|
|
6160 }
|
|
|
6161 #endif
|
|
|
6162 #endif
|
|
1313
|
6163
|
|
|
6164 if (!UNBOUNDP (oquit))
|
|
|
6165 Vquit_flag = oquit;
|
|
428
|
6166 }
|
|
853
|
6167 check_specbind_stack_sanity ();
|
|
428
|
6168 }
|
|
|
6169
|
|
|
6170
|
|
|
6171
|
|
|
6172 /* Get the value of symbol's global binding, even if that binding is
|
|
|
6173 not now dynamically visible. May return Qunbound or magic values. */
|
|
|
6174
|
|
|
6175 Lisp_Object
|
|
|
6176 top_level_value (Lisp_Object symbol)
|
|
|
6177 {
|
|
|
6178 REGISTER struct specbinding *ptr = specpdl;
|
|
|
6179
|
|
|
6180 CHECK_SYMBOL (symbol);
|
|
|
6181 for (; ptr != specpdl_ptr; ptr++)
|
|
|
6182 {
|
|
|
6183 if (EQ (ptr->symbol, symbol))
|
|
|
6184 return ptr->old_value;
|
|
|
6185 }
|
|
|
6186 return XSYMBOL (symbol)->value;
|
|
|
6187 }
|
|
|
6188
|
|
|
6189 #if 0
|
|
|
6190
|
|
|
6191 Lisp_Object
|
|
|
6192 top_level_set (Lisp_Object symbol, Lisp_Object newval)
|
|
|
6193 {
|
|
|
6194 REGISTER struct specbinding *ptr = specpdl;
|
|
|
6195
|
|
|
6196 CHECK_SYMBOL (symbol);
|
|
|
6197 for (; ptr != specpdl_ptr; ptr++)
|
|
|
6198 {
|
|
|
6199 if (EQ (ptr->symbol, symbol))
|
|
|
6200 {
|
|
|
6201 ptr->old_value = newval;
|
|
|
6202 return newval;
|
|
|
6203 }
|
|
|
6204 }
|
|
|
6205 return Fset (symbol, newval);
|
|
|
6206 }
|
|
|
6207
|
|
|
6208 #endif /* 0 */
|
|
|
6209
|
|
|
6210
|
|
|
6211 /************************************************************************/
|
|
|
6212 /* Backtraces */
|
|
|
6213 /************************************************************************/
|
|
|
6214
|
|
|
6215 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /*
|
|
|
6216 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.
|
|
|
6217 The debugger is entered when that frame exits, if the flag is non-nil.
|
|
|
6218 */
|
|
|
6219 (level, flag))
|
|
|
6220 {
|
|
|
6221 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
6222 REGISTER int i;
|
|
|
6223
|
|
|
6224 CHECK_INT (level);
|
|
|
6225
|
|
|
6226 for (i = 0; backlist && i < XINT (level); i++)
|
|
|
6227 {
|
|
|
6228 backlist = backlist->next;
|
|
|
6229 }
|
|
|
6230
|
|
|
6231 if (backlist)
|
|
|
6232 backlist->debug_on_exit = !NILP (flag);
|
|
|
6233
|
|
|
6234 return flag;
|
|
|
6235 }
|
|
|
6236
|
|
|
6237 static void
|
|
|
6238 backtrace_specials (int speccount, int speclimit, Lisp_Object stream)
|
|
|
6239 {
|
|
|
6240 int printing_bindings = 0;
|
|
|
6241
|
|
|
6242 for (; speccount > speclimit; speccount--)
|
|
|
6243 {
|
|
|
6244 if (specpdl[speccount - 1].func == 0
|
|
|
6245 || specpdl[speccount - 1].func == specbind_unwind_local
|
|
|
6246 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local)
|
|
|
6247 {
|
|
826
|
6248 write_c_string (stream, !printing_bindings ? " # bind (" : " ");
|
|
428
|
6249 Fprin1 (specpdl[speccount - 1].symbol, stream);
|
|
|
6250 printing_bindings = 1;
|
|
|
6251 }
|
|
|
6252 else
|
|
|
6253 {
|
|
826
|
6254 if (printing_bindings) write_c_string (stream, ")\n");
|
|
|
6255 write_c_string (stream, " # (unwind-protect ...)\n");
|
|
428
|
6256 printing_bindings = 0;
|
|
|
6257 }
|
|
|
6258 }
|
|
826
|
6259 if (printing_bindings) write_c_string (stream, ")\n");
|
|
428
|
6260 }
|
|
|
6261
|
|
1292
|
6262 static Lisp_Object
|
|
|
6263 backtrace_unevalled_args (Lisp_Object *args)
|
|
|
6264 {
|
|
|
6265 if (args)
|
|
|
6266 return *args;
|
|
|
6267 else
|
|
|
6268 return list1 (build_string ("[internal]"));
|
|
|
6269 }
|
|
|
6270
|
|
428
|
6271 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /*
|
|
|
6272 Print a trace of Lisp function calls currently active.
|
|
438
|
6273 Optional arg STREAM specifies the output stream to send the backtrace to,
|
|
444
|
6274 and defaults to the value of `standard-output'.
|
|
|
6275 Optional second arg DETAILED non-nil means show places where currently
|
|
|
6276 active variable bindings, catches, condition-cases, and
|
|
|
6277 unwind-protects, as well as function calls, were made.
|
|
428
|
6278 */
|
|
|
6279 (stream, detailed))
|
|
|
6280 {
|
|
|
6281 /* This function can GC */
|
|
|
6282 struct backtrace *backlist = backtrace_list;
|
|
|
6283 struct catchtag *catches = catchlist;
|
|
|
6284 int speccount = specpdl_depth();
|
|
|
6285
|
|
|
6286 int old_nl = print_escape_newlines;
|
|
|
6287 int old_pr = print_readably;
|
|
|
6288 Lisp_Object old_level = Vprint_level;
|
|
|
6289 Lisp_Object oiq = Vinhibit_quit;
|
|
|
6290 struct gcpro gcpro1, gcpro2;
|
|
|
6291
|
|
|
6292 /* We can't allow quits in here because that could cause the values
|
|
|
6293 of print_readably and print_escape_newlines to get screwed up.
|
|
|
6294 Normally we would use a record_unwind_protect but that would
|
|
|
6295 screw up the functioning of this function. */
|
|
|
6296 Vinhibit_quit = Qt;
|
|
|
6297
|
|
|
6298 entering_debugger = 0;
|
|
|
6299
|
|
872
|
6300 if (!NILP (detailed))
|
|
|
6301 Vprint_level = make_int (50);
|
|
|
6302 else
|
|
|
6303 Vprint_level = make_int (3);
|
|
428
|
6304 print_readably = 0;
|
|
|
6305 print_escape_newlines = 1;
|
|
|
6306
|
|
|
6307 GCPRO2 (stream, old_level);
|
|
|
6308
|
|
1261
|
6309 stream = canonicalize_printcharfun (stream);
|
|
428
|
6310
|
|
|
6311 for (;;)
|
|
|
6312 {
|
|
|
6313 if (!NILP (detailed) && catches && catches->backlist == backlist)
|
|
|
6314 {
|
|
|
6315 int catchpdl = catches->pdlcount;
|
|
438
|
6316 if (speccount > catchpdl
|
|
|
6317 && specpdl[catchpdl].func == condition_case_unwind)
|
|
428
|
6318 /* This is a condition-case catchpoint */
|
|
|
6319 catchpdl = catchpdl + 1;
|
|
|
6320
|
|
|
6321 backtrace_specials (speccount, catchpdl, stream);
|
|
|
6322
|
|
|
6323 speccount = catches->pdlcount;
|
|
|
6324 if (catchpdl == speccount)
|
|
|
6325 {
|
|
826
|
6326 write_c_string (stream, " # (catch ");
|
|
428
|
6327 Fprin1 (catches->tag, stream);
|
|
826
|
6328 write_c_string (stream, " ...)\n");
|
|
428
|
6329 }
|
|
|
6330 else
|
|
|
6331 {
|
|
826
|
6332 write_c_string (stream, " # (condition-case ... . ");
|
|
428
|
6333 Fprin1 (Fcdr (Fcar (catches->tag)), stream);
|
|
826
|
6334 write_c_string (stream, ")\n");
|
|
428
|
6335 }
|
|
|
6336 catches = catches->next;
|
|
|
6337 }
|
|
|
6338 else if (!backlist)
|
|
|
6339 break;
|
|
|
6340 else
|
|
|
6341 {
|
|
|
6342 if (!NILP (detailed) && backlist->pdlcount < speccount)
|
|
|
6343 {
|
|
|
6344 backtrace_specials (speccount, backlist->pdlcount, stream);
|
|
|
6345 speccount = backlist->pdlcount;
|
|
|
6346 }
|
|
826
|
6347 write_c_string (stream, backlist->debug_on_exit ? "* " : " ");
|
|
428
|
6348 if (backlist->nargs == UNEVALLED)
|
|
|
6349 {
|
|
1292
|
6350 Fprin1 (Fcons (*backlist->function,
|
|
|
6351 backtrace_unevalled_args (backlist->args)),
|
|
|
6352 stream);
|
|
826
|
6353 write_c_string (stream, "\n"); /* from FSFmacs 19.30 */
|
|
428
|
6354 }
|
|
|
6355 else
|
|
|
6356 {
|
|
|
6357 Lisp_Object tem = *backlist->function;
|
|
|
6358 Fprin1 (tem, stream); /* This can QUIT */
|
|
826
|
6359 write_c_string (stream, "(");
|
|
428
|
6360 if (backlist->nargs == MANY)
|
|
|
6361 {
|
|
|
6362 int i;
|
|
|
6363 Lisp_Object tail = Qnil;
|
|
|
6364 struct gcpro ngcpro1;
|
|
|
6365
|
|
|
6366 NGCPRO1 (tail);
|
|
|
6367 for (tail = *backlist->args, i = 0;
|
|
|
6368 !NILP (tail);
|
|
|
6369 tail = Fcdr (tail), i++)
|
|
|
6370 {
|
|
826
|
6371 if (i != 0) write_c_string (stream, " ");
|
|
428
|
6372 Fprin1 (Fcar (tail), stream);
|
|
|
6373 }
|
|
|
6374 NUNGCPRO;
|
|
|
6375 }
|
|
|
6376 else
|
|
|
6377 {
|
|
|
6378 int i;
|
|
|
6379 for (i = 0; i < backlist->nargs; i++)
|
|
|
6380 {
|
|
826
|
6381 if (!i && EQ (tem, Qbyte_code))
|
|
|
6382 {
|
|
|
6383 write_c_string (stream, "\"...\"");
|
|
|
6384 continue;
|
|
|
6385 }
|
|
|
6386 if (i != 0) write_c_string (stream, " ");
|
|
428
|
6387 Fprin1 (backlist->args[i], stream);
|
|
|
6388 }
|
|
|
6389 }
|
|
826
|
6390 write_c_string (stream, ")\n");
|
|
428
|
6391 }
|
|
|
6392 backlist = backlist->next;
|
|
|
6393 }
|
|
|
6394 }
|
|
|
6395 Vprint_level = old_level;
|
|
|
6396 print_readably = old_pr;
|
|
|
6397 print_escape_newlines = old_nl;
|
|
|
6398 UNGCPRO;
|
|
|
6399 Vinhibit_quit = oiq;
|
|
|
6400 return Qnil;
|
|
|
6401 }
|
|
|
6402
|
|
|
6403
|
|
444
|
6404 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, 0, /*
|
|
|
6405 Return the function and arguments NFRAMES up from current execution point.
|
|
428
|
6406 If that frame has not evaluated the arguments yet (or is a special form),
|
|
|
6407 the value is (nil FUNCTION ARG-FORMS...).
|
|
|
6408 If that frame has evaluated its arguments and called its function already,
|
|
|
6409 the value is (t FUNCTION ARG-VALUES...).
|
|
|
6410 A &rest arg is represented as the tail of the list ARG-VALUES.
|
|
|
6411 FUNCTION is whatever was supplied as car of evaluated list,
|
|
|
6412 or a lambda expression for macro calls.
|
|
444
|
6413 If NFRAMES is more than the number of frames, the value is nil.
|
|
428
|
6414 */
|
|
|
6415 (nframes))
|
|
|
6416 {
|
|
|
6417 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
6418 REGISTER int i;
|
|
|
6419 Lisp_Object tem;
|
|
|
6420
|
|
|
6421 CHECK_NATNUM (nframes);
|
|
|
6422
|
|
|
6423 /* Find the frame requested. */
|
|
|
6424 for (i = XINT (nframes); backlist && (i-- > 0);)
|
|
|
6425 backlist = backlist->next;
|
|
|
6426
|
|
|
6427 if (!backlist)
|
|
|
6428 return Qnil;
|
|
|
6429 if (backlist->nargs == UNEVALLED)
|
|
1292
|
6430 return Fcons (Qnil, Fcons (*backlist->function,
|
|
|
6431 backtrace_unevalled_args (backlist->args)));
|
|
428
|
6432 else
|
|
|
6433 {
|
|
|
6434 if (backlist->nargs == MANY)
|
|
|
6435 tem = *backlist->args;
|
|
|
6436 else
|
|
|
6437 tem = Flist (backlist->nargs, backlist->args);
|
|
|
6438
|
|
|
6439 return Fcons (Qt, Fcons (*backlist->function, tem));
|
|
|
6440 }
|
|
|
6441 }
|
|
|
6442
|
|
|
6443
|
|
|
6444 /************************************************************************/
|
|
|
6445 /* Warnings */
|
|
|
6446 /************************************************************************/
|
|
|
6447
|
|
1123
|
6448 static int
|
|
|
6449 warning_will_be_discarded (Lisp_Object level)
|
|
|
6450 {
|
|
|
6451 /* Don't even generate debug warnings if they're going to be discarded,
|
|
|
6452 to avoid excessive consing. */
|
|
|
6453 return (EQ (level, Qdebug) && !NILP (Vlog_warning_minimum_level) &&
|
|
|
6454 !EQ (Vlog_warning_minimum_level, Qdebug));
|
|
|
6455 }
|
|
|
6456
|
|
428
|
6457 void
|
|
1204
|
6458 warn_when_safe_lispobj (Lisp_Object class_, Lisp_Object level,
|
|
428
|
6459 Lisp_Object obj)
|
|
|
6460 {
|
|
1123
|
6461 if (warning_will_be_discarded (level))
|
|
793
|
6462 return;
|
|
1123
|
6463
|
|
1204
|
6464 obj = list1 (list3 (class_, level, obj));
|
|
428
|
6465 if (NILP (Vpending_warnings))
|
|
|
6466 Vpending_warnings = Vpending_warnings_tail = obj;
|
|
|
6467 else
|
|
|
6468 {
|
|
|
6469 Fsetcdr (Vpending_warnings_tail, obj);
|
|
|
6470 Vpending_warnings_tail = obj;
|
|
|
6471 }
|
|
|
6472 }
|
|
|
6473
|
|
|
6474 /* #### This should probably accept Lisp objects; but then we have
|
|
|
6475 to make sure that Feval() isn't called, since it might not be safe.
|
|
|
6476
|
|
|
6477 An alternative approach is to just pass some non-string type of
|
|
|
6478 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will
|
|
|
6479 automatically be called when it is safe to do so. */
|
|
|
6480
|
|
|
6481 void
|
|
1204
|
6482 warn_when_safe (Lisp_Object class_, Lisp_Object level, const CIbyte *fmt, ...)
|
|
428
|
6483 {
|
|
|
6484 Lisp_Object obj;
|
|
|
6485 va_list args;
|
|
|
6486
|
|
1123
|
6487 if (warning_will_be_discarded (level))
|
|
793
|
6488 return;
|
|
1123
|
6489
|
|
428
|
6490 va_start (args, fmt);
|
|
771
|
6491 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
428
|
6492 va_end (args);
|
|
|
6493
|
|
1204
|
6494 warn_when_safe_lispobj (class_, level, obj);
|
|
428
|
6495 }
|
|
|
6496
|
|
|
6497
|
|
|
6498
|
|
|
6499
|
|
|
6500 /************************************************************************/
|
|
|
6501 /* Initialization */
|
|
|
6502 /************************************************************************/
|
|
|
6503
|
|
|
6504 void
|
|
|
6505 syms_of_eval (void)
|
|
|
6506 {
|
|
442
|
6507 INIT_LRECORD_IMPLEMENTATION (subr);
|
|
|
6508
|
|
563
|
6509 DEFSYMBOL (Qinhibit_quit);
|
|
|
6510 DEFSYMBOL (Qautoload);
|
|
|
6511 DEFSYMBOL (Qdebug_on_error);
|
|
|
6512 DEFSYMBOL (Qstack_trace_on_error);
|
|
|
6513 DEFSYMBOL (Qdebug_on_signal);
|
|
|
6514 DEFSYMBOL (Qstack_trace_on_signal);
|
|
|
6515 DEFSYMBOL (Qdebugger);
|
|
|
6516 DEFSYMBOL (Qmacro);
|
|
428
|
6517 defsymbol (&Qand_rest, "&rest");
|
|
|
6518 defsymbol (&Qand_optional, "&optional");
|
|
|
6519 /* Note that the process code also uses Qexit */
|
|
563
|
6520 DEFSYMBOL (Qexit);
|
|
|
6521 DEFSYMBOL (Qsetq);
|
|
|
6522 DEFSYMBOL (Qinteractive);
|
|
|
6523 DEFSYMBOL (Qcommandp);
|
|
|
6524 DEFSYMBOL (Qdefun);
|
|
|
6525 DEFSYMBOL (Qprogn);
|
|
|
6526 DEFSYMBOL (Qvalues);
|
|
|
6527 DEFSYMBOL (Qdisplay_warning);
|
|
|
6528 DEFSYMBOL (Qrun_hooks);
|
|
887
|
6529 DEFSYMBOL (Qfinalize_list);
|
|
563
|
6530 DEFSYMBOL (Qif);
|
|
428
|
6531
|
|
|
6532 DEFSUBR (For);
|
|
|
6533 DEFSUBR (Fand);
|
|
|
6534 DEFSUBR (Fif);
|
|
|
6535 DEFSUBR_MACRO (Fwhen);
|
|
|
6536 DEFSUBR_MACRO (Funless);
|
|
|
6537 DEFSUBR (Fcond);
|
|
|
6538 DEFSUBR (Fprogn);
|
|
|
6539 DEFSUBR (Fprog1);
|
|
|
6540 DEFSUBR (Fprog2);
|
|
|
6541 DEFSUBR (Fsetq);
|
|
|
6542 DEFSUBR (Fquote);
|
|
|
6543 DEFSUBR (Ffunction);
|
|
|
6544 DEFSUBR (Fdefun);
|
|
|
6545 DEFSUBR (Fdefmacro);
|
|
|
6546 DEFSUBR (Fdefvar);
|
|
|
6547 DEFSUBR (Fdefconst);
|
|
|
6548 DEFSUBR (Fuser_variable_p);
|
|
|
6549 DEFSUBR (Flet);
|
|
|
6550 DEFSUBR (FletX);
|
|
|
6551 DEFSUBR (Fwhile);
|
|
|
6552 DEFSUBR (Fmacroexpand_internal);
|
|
|
6553 DEFSUBR (Fcatch);
|
|
|
6554 DEFSUBR (Fthrow);
|
|
|
6555 DEFSUBR (Funwind_protect);
|
|
|
6556 DEFSUBR (Fcondition_case);
|
|
|
6557 DEFSUBR (Fcall_with_condition_handler);
|
|
|
6558 DEFSUBR (Fsignal);
|
|
|
6559 DEFSUBR (Finteractive_p);
|
|
|
6560 DEFSUBR (Fcommandp);
|
|
|
6561 DEFSUBR (Fcommand_execute);
|
|
|
6562 DEFSUBR (Fautoload);
|
|
|
6563 DEFSUBR (Feval);
|
|
|
6564 DEFSUBR (Fapply);
|
|
|
6565 DEFSUBR (Ffuncall);
|
|
|
6566 DEFSUBR (Ffunctionp);
|
|
|
6567 DEFSUBR (Ffunction_min_args);
|
|
|
6568 DEFSUBR (Ffunction_max_args);
|
|
|
6569 DEFSUBR (Frun_hooks);
|
|
|
6570 DEFSUBR (Frun_hook_with_args);
|
|
|
6571 DEFSUBR (Frun_hook_with_args_until_success);
|
|
|
6572 DEFSUBR (Frun_hook_with_args_until_failure);
|
|
|
6573 DEFSUBR (Fbacktrace_debug);
|
|
|
6574 DEFSUBR (Fbacktrace);
|
|
|
6575 DEFSUBR (Fbacktrace_frame);
|
|
|
6576 }
|
|
|
6577
|
|
|
6578 void
|
|
814
|
6579 init_eval_semi_early (void)
|
|
428
|
6580 {
|
|
|
6581 specpdl_ptr = specpdl;
|
|
|
6582 specpdl_depth_counter = 0;
|
|
|
6583 catchlist = 0;
|
|
|
6584 Vcondition_handlers = Qnil;
|
|
|
6585 backtrace_list = 0;
|
|
|
6586 Vquit_flag = Qnil;
|
|
|
6587 debug_on_next_call = 0;
|
|
|
6588 lisp_eval_depth = 0;
|
|
|
6589 entering_debugger = 0;
|
|
|
6590 }
|
|
|
6591
|
|
|
6592 void
|
|
|
6593 reinit_vars_of_eval (void)
|
|
|
6594 {
|
|
|
6595 preparing_for_armageddon = 0;
|
|
|
6596 in_warnings = 0;
|
|
|
6597 specpdl_size = 50;
|
|
|
6598 specpdl = xnew_array (struct specbinding, specpdl_size);
|
|
|
6599 /* XEmacs change: increase these values. */
|
|
|
6600 max_specpdl_size = 3000;
|
|
442
|
6601 max_lisp_eval_depth = 1000;
|
|
|
6602 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
6603 throw_level = 0;
|
|
|
6604 #endif
|
|
2367
|
6605 init_eval_semi_early ();
|
|
428
|
6606 }
|
|
|
6607
|
|
|
6608 void
|
|
|
6609 vars_of_eval (void)
|
|
|
6610 {
|
|
|
6611 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /*
|
|
|
6612 Limit on number of Lisp variable bindings & unwind-protects before error.
|
|
|
6613 */ );
|
|
|
6614
|
|
|
6615 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /*
|
|
|
6616 Limit on depth in `eval', `apply' and `funcall' before error.
|
|
|
6617 This limit is to catch infinite recursions for you before they cause
|
|
|
6618 actual stack overflow in C, which would be fatal for Emacs.
|
|
|
6619 You can safely make it considerably larger than its default value,
|
|
|
6620 if that proves inconveniently small.
|
|
|
6621 */ );
|
|
|
6622
|
|
|
6623 DEFVAR_LISP ("quit-flag", &Vquit_flag /*
|
|
853
|
6624 t causes running Lisp code to abort, unless `inhibit-quit' is non-nil.
|
|
|
6625 `critical' causes running Lisp code to abort regardless of `inhibit-quit'.
|
|
|
6626 Normally, you do not need to set this value yourself. It is set to
|
|
|
6627 t each time a Control-G is detected, and to `critical' each time a
|
|
|
6628 Shift-Control-G is detected. The XEmacs core C code is littered with
|
|
|
6629 calls to the QUIT; macro, which check the values of `quit-flag' and
|
|
2500
|
6630 `inhibit-quit' and ABORT (or more accurately, call (signal 'quit)) if
|
|
853
|
6631 it's correct to do so.
|
|
428
|
6632 */ );
|
|
|
6633 Vquit_flag = Qnil;
|
|
|
6634
|
|
|
6635 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /*
|
|
|
6636 Non-nil inhibits C-g quitting from happening immediately.
|
|
|
6637 Note that `quit-flag' will still be set by typing C-g,
|
|
|
6638 so a quit will be signalled as soon as `inhibit-quit' is nil.
|
|
|
6639 To prevent this happening, set `quit-flag' to nil
|
|
853
|
6640 before making `inhibit-quit' nil.
|
|
|
6641
|
|
|
6642 The value of `inhibit-quit' is ignored if a critical quit is
|
|
|
6643 requested by typing control-shift-G in a window-system frame;
|
|
|
6644 this is explained in more detail in `quit-flag'.
|
|
428
|
6645 */ );
|
|
|
6646 Vinhibit_quit = Qnil;
|
|
|
6647
|
|
|
6648 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /*
|
|
|
6649 *Non-nil means automatically display a backtrace buffer
|
|
|
6650 after any error that is not handled by a `condition-case'.
|
|
|
6651 If the value is a list, an error only means to display a backtrace
|
|
|
6652 if one of its condition symbols appears in the list.
|
|
|
6653 See also variable `stack-trace-on-signal'.
|
|
|
6654 */ );
|
|
|
6655 Vstack_trace_on_error = Qnil;
|
|
|
6656
|
|
|
6657 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /*
|
|
|
6658 *Non-nil means automatically display a backtrace buffer
|
|
|
6659 after any error that is signalled, whether or not it is handled by
|
|
|
6660 a `condition-case'.
|
|
|
6661 If the value is a list, an error only means to display a backtrace
|
|
|
6662 if one of its condition symbols appears in the list.
|
|
|
6663 See also variable `stack-trace-on-error'.
|
|
|
6664 */ );
|
|
|
6665 Vstack_trace_on_signal = Qnil;
|
|
|
6666
|
|
|
6667 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /*
|
|
|
6668 *List of errors for which the debugger should not be called.
|
|
|
6669 Each element may be a condition-name or a regexp that matches error messages.
|
|
|
6670 If any element applies to a given error, that error skips the debugger
|
|
|
6671 and just returns to top level.
|
|
|
6672 This overrides the variable `debug-on-error'.
|
|
|
6673 It does not apply to errors handled by `condition-case'.
|
|
|
6674 */ );
|
|
|
6675 Vdebug_ignored_errors = Qnil;
|
|
|
6676
|
|
|
6677 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /*
|
|
|
6678 *Non-nil means enter debugger if an unhandled error is signalled.
|
|
|
6679 The debugger will not be entered if the error is handled by
|
|
|
6680 a `condition-case'.
|
|
|
6681 If the value is a list, an error only means to enter the debugger
|
|
|
6682 if one of its condition symbols appears in the list.
|
|
|
6683 This variable is overridden by `debug-ignored-errors'.
|
|
|
6684 See also variables `debug-on-quit' and `debug-on-signal'.
|
|
1123
|
6685
|
|
|
6686 If this variable is set while XEmacs is running noninteractively (using
|
|
|
6687 `-batch'), and XEmacs was configured with `--debug' (#define XEMACS_DEBUG
|
|
|
6688 in the C code), instead of trying to invoke the Lisp debugger (which
|
|
|
6689 obviously won't work), XEmacs will break out to a C debugger using
|
|
|
6690 \(force-debugging-signal t). This is useful because debugging
|
|
|
6691 noninteractive runs of XEmacs is often very difficult, since they typically
|
|
|
6692 happen as part of sometimes large and complex make suites (e.g. rebuilding
|
|
2500
|
6693 the XEmacs packages). NOTE: This runs ABORT()!!! (As well as and after
|
|
1123
|
6694 executing INT 3 under MS Windows, which should invoke a debugger if it's
|
|
|
6695 active.) This is guaranteed to kill XEmacs! (But in this situation, XEmacs
|
|
|
6696 is about to die anyway, and if no debugger is present, this will usefully
|
|
|
6697 dump core.) The most useful way to set this flag when debugging
|
|
|
6698 noninteractive runs, especially in makefiles, is using the environment
|
|
|
6699 variable XEMACSDEBUG, like this:
|
|
771
|
6700
|
|
|
6701 \(using csh) setenv XEMACSDEBUG '(setq debug-on-error t)'
|
|
|
6702 \(using bash) export XEMACSDEBUG='(setq debug-on-error t)'
|
|
428
|
6703 */ );
|
|
|
6704 Vdebug_on_error = Qnil;
|
|
|
6705
|
|
|
6706 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /*
|
|
|
6707 *Non-nil means enter debugger if an error is signalled.
|
|
|
6708 The debugger will be entered whether or not the error is handled by
|
|
|
6709 a `condition-case'.
|
|
|
6710 If the value is a list, an error only means to enter the debugger
|
|
|
6711 if one of its condition symbols appears in the list.
|
|
|
6712 See also variable `debug-on-quit'.
|
|
1123
|
6713
|
|
|
6714 This will attempt to enter a C debugger when XEmacs is run noninteractively
|
|
|
6715 and under the same conditions as described in `debug-on-error'.
|
|
428
|
6716 */ );
|
|
|
6717 Vdebug_on_signal = Qnil;
|
|
|
6718
|
|
|
6719 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /*
|
|
|
6720 *Non-nil means enter debugger if quit is signalled (C-G, for example).
|
|
|
6721 Does not apply if quit is handled by a `condition-case'. Entering the
|
|
|
6722 debugger can also be achieved at any time (for X11 console) by typing
|
|
|
6723 control-shift-G to signal a critical quit.
|
|
|
6724 */ );
|
|
|
6725 debug_on_quit = 0;
|
|
|
6726
|
|
|
6727 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /*
|
|
|
6728 Non-nil means enter debugger before next `eval', `apply' or `funcall'.
|
|
|
6729 */ );
|
|
|
6730
|
|
1292
|
6731 DEFVAR_BOOL ("backtrace-with-interal-sections",
|
|
|
6732 &backtrace_with_internal_sections /*
|
|
|
6733 Non-nil means backtraces will contain additional information indicating
|
|
|
6734 when particular sections of the C code have been entered, e.g. redisplay(),
|
|
|
6735 byte-char conversion, internal-external conversion, etc. This can be
|
|
|
6736 particularly useful when XEmacs crashes, in helping to pinpoint the problem.
|
|
|
6737 */ );
|
|
|
6738 #ifdef ERROR_CHECK_STRUCTURES
|
|
|
6739 backtrace_with_internal_sections = 1;
|
|
|
6740 #else
|
|
|
6741 backtrace_with_internal_sections = 0;
|
|
|
6742 #endif
|
|
|
6743
|
|
428
|
6744 DEFVAR_LISP ("debugger", &Vdebugger /*
|
|
|
6745 Function to call to invoke debugger.
|
|
|
6746 If due to frame exit, args are `exit' and the value being returned;
|
|
|
6747 this function's value will be returned instead of that.
|
|
|
6748 If due to error, args are `error' and a list of the args to `signal'.
|
|
|
6749 If due to `apply' or `funcall' entry, one arg, `lambda'.
|
|
|
6750 If due to `eval' entry, one arg, t.
|
|
|
6751 */ );
|
|
|
6752 Vdebugger = Qnil;
|
|
|
6753
|
|
853
|
6754 staticpro (&Vcatch_everything_tag);
|
|
|
6755 Vcatch_everything_tag = make_opaque (OPAQUE_CLEAR, 0);
|
|
|
6756
|
|
428
|
6757 staticpro (&Vpending_warnings);
|
|
|
6758 Vpending_warnings = Qnil;
|
|
1204
|
6759 dump_add_root_lisp_object (&Vpending_warnings_tail);
|
|
428
|
6760 Vpending_warnings_tail = Qnil;
|
|
|
6761
|
|
793
|
6762 DEFVAR_LISP ("log-warning-minimum-level", &Vlog_warning_minimum_level);
|
|
|
6763 Vlog_warning_minimum_level = Qinfo;
|
|
|
6764
|
|
428
|
6765 staticpro (&Vautoload_queue);
|
|
|
6766 Vautoload_queue = Qnil;
|
|
|
6767
|
|
|
6768 staticpro (&Vcondition_handlers);
|
|
|
6769
|
|
853
|
6770 staticpro (&Vdeletable_permanent_display_objects);
|
|
|
6771 Vdeletable_permanent_display_objects = Qnil;
|
|
|
6772
|
|
|
6773 staticpro (&Vmodifiable_buffers);
|
|
|
6774 Vmodifiable_buffers = Qnil;
|
|
|
6775
|
|
|
6776 inhibit_flags = 0;
|
|
|
6777 }
|
