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428
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1 /* Static Heap management routines for XEmacs.
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2 Copyright (C) 1994, 1998 Free Software Foundation, Inc.
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to the Free
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18 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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19 02111-1307, USA.*/
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20
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21 #include <config.h>
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22 #include "lisp.h"
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442
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23
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771
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24 #include "sysfile.h"
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25
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428
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26 #include <unistd.h>
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27 #include <sheap-adjust.h>
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28
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29 #define STATIC_HEAP_BASE 0x800000
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30 #define STATIC_HEAP_SLOP 0x40000
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31 #define STATIC_HEAP_SIZE \
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32 (STATIC_HEAP_BASE + SHEAP_ADJUSTMENT + STATIC_HEAP_SLOP)
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33 #define BLOCKSIZE (1<<12)
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34 #define ALLOC_UNIT (BLOCKSIZE-1)
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35 #define ALLOC_MASK ~((unsigned long)(ALLOC_UNIT))
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36 #define ALIGN_ALLOC(addr) ((((unsigned long)addr) + ALLOC_UNIT) & ALLOC_MASK)
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37
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38 char static_heap_buffer[STATIC_HEAP_SIZE]={0};
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39 char* static_heap_base=static_heap_buffer;
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40 char* static_heap_ptr=static_heap_buffer;
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41 unsigned long static_heap_size=STATIC_HEAP_SIZE;
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42 int static_heap_initialized=0;
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43 int static_heap_dumped=0;
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44
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442
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45 void* more_static_core ( ptrdiff_t increment );
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428
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46 void* more_static_core ( ptrdiff_t increment )
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47 {
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48 int size = (int) increment;
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49 void *result;
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50
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51 if (!static_heap_initialized)
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52 {
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53 #ifdef VALMASK
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54 if (((unsigned long) static_heap_base & ~VALMASK) != 0)
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55 {
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56 printf ("error: The heap was allocated in upper memory.\n");
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57 exit (-1);
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58 }
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59 #endif
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60 static_heap_base=(char*)ALIGN_ALLOC(static_heap_buffer);
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61 static_heap_ptr=static_heap_base;
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62 static_heap_size=STATIC_HEAP_SIZE -
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63 (static_heap_base-static_heap_buffer);
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442
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64 #ifdef CYGWIN
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428
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65 sbrk(BLOCKSIZE); /* force space for fork to work */
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66 #endif
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67 static_heap_initialized=1;
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68 }
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69
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70 result = static_heap_ptr;
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71
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72 /* we don't need to align - handled by gmalloc. */
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73
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74 if (size < 0)
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75 {
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76 if (static_heap_ptr + size < static_heap_base)
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77 {
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78 return 0;
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79 }
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80 }
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81 else
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82 {
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83 if (static_heap_ptr + size >= static_heap_base + static_heap_size)
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84 {
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85 printf(
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86
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87 "\nRequested %d bytes, static heap exhausted! base is %p, current ptr
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88 is %p. You have exhausted the static heap.
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89
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90 If you are simply trying to compile, remove sheap-adjust.h
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91 and recompile from the top level. If this doesn't
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92 work then STATIC_HEAP_SLOP (defined in this file) is too small.
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93
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94 If you want to run temacs, change SHEAP_ADJUSTMENT in sheap-adjust.h
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95 to 0 or a +ve number. Generally you should *not* try to run temacs
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96 with a static heap, you should dump first.\n", size,
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97 static_heap_base, static_heap_ptr);
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98
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99 exit(-1);
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100 return 0;
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101 }
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102 }
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103 static_heap_ptr += size;
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104
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105 return result;
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106 }
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107
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108 static void
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109 sheap_adjust_h ()
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110 {
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771
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111 FILE *stream = retry_fopen ("sheap-adjust.h", "w");
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428
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112
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113 if (stream == NULL)
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114 report_file_error ("Opening sheap adjustment file",
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563
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115 build_string ("sheap-adjust.h"));
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428
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116
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117 fprintf (stream,
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118 "/*\tDo not edit this file!\n"
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119 "\tAutomatically generated by XEmacs */\n"
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120 "# define SHEAP_ADJUSTMENT (%d)\n",
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121 ((static_heap_ptr - static_heap_buffer) - STATIC_HEAP_BASE));
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771
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122 retry_fclose (stream);
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428
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123 }
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124
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442
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125 void report_sheap_usage (int die_if_pure_storage_exceeded);
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428
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126 void
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127 report_sheap_usage (int die_if_pure_storage_exceeded)
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128 {
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129 int rc = 0;
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130
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665
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131 Bytecount lost = (STATIC_HEAP_BASE + STATIC_HEAP_SLOP + SHEAP_ADJUSTMENT)
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428
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132 - (static_heap_ptr - static_heap_buffer);
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133 char buf[200];
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134 sprintf (buf, "Static heap usage: %ld of %ld",
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135 (long) (static_heap_ptr - static_heap_buffer),
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136 (long) (STATIC_HEAP_BASE + STATIC_HEAP_SLOP + SHEAP_ADJUSTMENT));
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137
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138 if (lost > STATIC_HEAP_SLOP) {
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139 sprintf (buf + strlen (buf), " -- %ldk wasted", (long)(lost/1024));
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140 if (die_if_pure_storage_exceeded) {
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141 sheap_adjust_h();
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142 rc = -1;
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143 }
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144 message ("%s", buf);
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145 }
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146
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147 if (rc < 0) {
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148 unlink("SATISFIED");
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149 fatal ("Static heap size adjusted, Don't Panic! I will restart the `make'");
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150 }
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151 }
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152
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153
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