annotate src/ntheap.c @ 2367:ecf1ebac70d8

[xemacs-hg @ 2004-11-04 23:05:23 by ben] commit mega-patch configure.in: Turn off -Winline and -Wchar-subscripts. Use the right set of cflags when compiling modules. Rewrite ldap configuration to separate the inclusion of lber (needed in recent Cygwin) from the basic checks for the needed libraries. add a function for MAKE_JUNK_C; initially code was added to generate xemacs.def using this, but it will need to be rewritten. add an rm -f for junk.c to avoid weird Cygwin bug with cp -f onto an existing file. Sort list of auto-detected functions and eliminate unused checks for stpcpy, setlocale and getwd. Add autodetection of Cygwin scanf problems BETA: Rewrite section on configure to indicate what flags are important and what not. digest-doc.c, make-dump-id.c, profile.c, sorted-doc.c: Add proper decls for main(). make-msgfile.c: Document that this is old junk. Move proposal to text.c. make-msgfile.lex: Move proposal to text.c. make-mswin-unicode.pl: Convert error-generating code so that the entire message will be seen as a single unrecognized token. mule/mule-ccl.el: Update docs. lispref/mule.texi: Update CCL docs. ldap/eldap.c: Mule-ize. Use EXTERNAL_LIST_LOOP_2 instead of deleted EXTERNAL_LIST_LOOP. * XEmacs 21.5.18 "chestnut" is released. --------------------------------------------------------------- MULE-RELATED WORK: --------------------------------------------------------------- --------------------------- byte-char conversion --------------------------- buffer.c, buffer.h, insdel.c, text.c: Port FSF algorithm for byte-char conversion, replacing broken previous version. Track the char position of the gap. Add functions to do char-byte conversion downwards as well as upwards. Move comments about algorithm workings to internals manual. --------------------------- work on types --------------------------- alloc.c, console-x-impl.h, dump-data.c, dump-data.h, dumper.c, dialog-msw.c, dired-msw.c, doc.c, editfns.c, esd.c, event-gtk.h, event-msw.c, events.c, file-coding.c, file-coding.h, fns.c, glyphs-eimage.c, glyphs-gtk.c, glyphs-msw.c, glyphs-shared.c, glyphs-x.c, glyphs.c, glyphs.h, gui.c, hpplay.c, imgproc.c, intl-win32.c, lrecord.h, lstream.c, keymap.c, lisp.h, libsst.c, linuxplay.c, miscplay.c, miscplay.h, mule-coding.c, nas.c, nt.c, ntheap.c, ntplay.c, objects-msw.c, objects-tty.c, objects-x.c, print.c, process-nt.c, process.c, redisplay.h, select-common.h, select-gtk.c, select-x.c, sgiplay.c, sound.c, sound.h, sunplay.c, sysfile.h, sysdep.c, syswindows.h, text.c, unexnt.c, win32.c, xgccache.c: Further work on types. This creates a full set of types for all the basic semantics of `char' that I have so far identified, so that its semantics can always be identified for the purposes of proper Mule-safe code, and the raw use of `char' always avoided. (1) More type renaming, for consistency of naming. Char_ASCII -> Ascbyte UChar_ASCII -> UAscbyte Char_Binary -> CBinbyte UChar_Binary -> Binbyte SChar_Binary -> SBinbyte (2) Introduce Rawbyte, CRawbyte, Boolbyte, Chbyte, UChbyte, and Bitbyte and use them. (3) New types Itext, Wexttext and Textcount for separating out the concepts of bytes and textual units (different under UTF-16 and UTF-32, which are potential internal encodings). (4) qxestr*_c -> qxestr*_ascii. lisp.h: New; goes with other qxe() functions. #### Maybe goes in a different section. lisp.h: Group generic int-type defs together with EMACS_INT defs. lisp.h: * lisp.h (WEXTTEXT_IS_WIDE) New defns. lisp.h: New type to replace places where int occurs as a boolean. It's signed because occasionally people may want to use -1 as an error value, and because unsigned ints are viral -- see comments in the internals manual against using them. dynarr.c: int -> Bytecount. --------------------------- Mule-izing --------------------------- device-x.c: Partially Mule-ize. dumper.c, dumper.h: Mule-ize. Use Rawbyte. Use stderr_out not printf. Use wext_*(). sysdep.c, syswindows.h, text.c: New Wexttext API for manipulation of external text that may be Unicode (e.g. startup code under Windows). emacs.c: Mule-ize. Properly deal with argv in external encoding. Use wext_*() and Wexttext. Use Rawbyte. #if 0 some old junk on SCO that is unlikely to be correct. Rewrite allocation code in run-temacs. emacs.c, symsinit.h, win32.c: Rename win32 init function and call it even earlier, to initialize mswindows_9x_p even earlier, for use in startup code (XEUNICODE_P). process.c: Use _wenviron not environ under Windows, to get Unicode environment variables. event-Xt.c: Mule-ize drag-n-drop related stuff. dragdrop.c, dragdrop.h, frame-x.c: Mule-ize. text.h: Add some more stand-in defines for particular kinds of conversion; use in Mule-ization work in frame-x.c etc. --------------------------- Freshening --------------------------- intl-auto-encap-win32.c, intl-auto-encap-win32.h: Regenerate. --------------------------- Unicode-work --------------------------- intl-win32.c, syswindows.h: Factor out common options to MultiByteToWideChar and WideCharToMultiByte. Add convert_unicode_to_multibyte_malloc() and convert_unicode_to_multibyte_dynarr() and use. Add stuff for alloca() conversion of multibyte/unicode. alloc.c: Use dfc_external_data_len() in case of unicode coding system. alloc.c, mule-charset.c: Don't zero out and reinit charset Unicode tables. This fucks up dump-time loading. Anyway, either we load them at dump time or run time, never both. unicode.c: Dump the blank tables as well. --------------------------------------------------------------- DOCUMENTATION, MOSTLY MULE-RELATED: --------------------------------------------------------------- EmacsFrame.c, emodules.c, event-Xt.c, fileio.c, input-method-xlib.c, mule-wnnfns.c, redisplay-gtk.c, redisplay-tty.c, redisplay-x.c, regex.c, sysdep.c: Add comment about Mule work needed. text.h: Add more documentation describing why DFC routines were not written to return their value. Add some other DFC documentation. console-msw.c, console-msw.h: Add pointer to docs in win32.c. emacs.c: Add comments on sources of doc info. text.c, charset.h, unicode.c, intl-win32.c, intl-encap-win32.c, text.h, file-coding.c, mule-coding.c: Collect background comments and related to text matters and internationalization, and proposals for work to be done, in text.c or Internals manual, stuff related to specific textual API's in text.h, and stuff related to internal implementation of Unicode conversion in unicode.c. Put lots of pointers to the comments to make them easier to find. s/mingw32.h, s/win32-common.h, s/win32-native.h, s/windowsnt.h, win32.c: Add bunches of new documentation on the different kinds of builds and environments under Windows and how they work. Collect this info in win32.c. Add pointers to these docs in the relevant s/* files. emacs.c: Document places with long comments. Remove comment about exiting, move to internals manual, put in pointer. event-stream.c: Move docs about event queues and focus to internals manual, put in pointer. events.h: Move docs about event stream callbacks to internals manual, put in pointer. profile.c, redisplay.c, signal.c: Move documentation to the Internals manual. process-nt.c: Add pointer to comment in win32-native.el. lisp.h: Add comments about some comment conventions. lisp.h: Add comment about the second argument. device-msw.c, redisplay-msw.c: @@#### comments are out-of-date. --------------------------------------------------------------- PDUMP WORK (MOTIVATED BY UNICODE CHANGES) --------------------------------------------------------------- alloc.c, buffer.c, bytecode.c, console-impl.h, console.c, device.c, dumper.c, lrecord.h, elhash.c, emodules.h, events.c, extents.c, frame.c, glyphs.c, glyphs.h, mule-charset.c, mule-coding.c, objects.c, profile.c, rangetab.c, redisplay.c, specifier.c, specifier.h, window.c, lstream.c, file-coding.h, file-coding.c: PDUMP: Properly implement dump_add_root_block(), which never worked before, and is necessary for dumping Unicode tables. Pdump name changes for accuracy: XD_STRUCT_PTR -> XD_BLOCK_PTR. XD_STRUCT_ARRAY -> XD_BLOCK_ARRAY. XD_C_STRING -> XD_ASCII_STRING. *_structure_* -> *_block_*. lrecord.h: some comments added about dump_add_root_block() vs dump_add_root_block_ptr(). extents.c: remove incorrect comment about pdump problems with gap array. --------------------------------------------------------------- ALLOCATION --------------------------------------------------------------- abbrev.c, alloc.c, bytecode.c, casefiddle.c, device-msw.c, device-x.c, dired-msw.c, doc.c, doprnt.c, dragdrop.c, editfns.c, emodules.c, file-coding.c, fileio.c, filelock.c, fns.c, glyphs-eimage.c, glyphs-gtk.c, glyphs-msw.c, glyphs-x.c, gui-msw.c, gui-x.c, imgproc.c, intl-win32.c, lread.c, menubar-gtk.c, menubar.c, nt.c, objects-msw.c, objects-x.c, print.c, process-nt.c, process-unix.c, process.c, realpath.c, redisplay.c, search.c, select-common.c, symbols.c, sysdep.c, syswindows.h, text.c, text.h, ui-byhand.c: New macros {alloca,xnew}_{itext,{i,ext,raw,bin,asc}bytes} for more convenient allocation of these commonly requested items. Modify functions to use alloca_ibytes, alloca_array, alloca_extbytes, xnew_ibytes, etc. also XREALLOC_ARRAY, xnew. alloc.c: Rewrite the allocation functions to factor out repeated code. Add assertions for freeing dumped data. lisp.h: Moved down and consolidated with other allocation stuff. lisp.h, dynarr.c: New functions for allocation that's very efficient when mostly in LIFO order. lisp.h, text.c, text.h: Factor out some stuff for general use by alloca()-conversion funs. text.h, lisp.h: Fill out convenience routines for allocating various kinds of bytes and put them in lisp.h. Use them in place of xmalloc(), ALLOCA(). text.h: Fill out the convenience functions so the _MALLOC() kinds match the alloca() kinds. --------------------------------------------------------------- ERROR-CHECKING --------------------------------------------------------------- text.h: Create ASSERT_ASCTEXT_ASCII() and ASSERT_ASCTEXT_ASCII_LEN() from similar Eistring checkers and change the Eistring checkers to use them instead. --------------------------------------------------------------- MACROS IN LISP.H --------------------------------------------------------------- lisp.h: Redo GCPRO declarations. Create a "base" set of functions that can be used to generate any kind of gcpro sets -- regular, ngcpro, nngcpro, private ones used in GC_EXTERNAL_LIST_LOOP_2. buffer.c, callint.c, chartab.c, console-msw.c, device-x.c, dialog-msw.c, dired.c, extents.c, ui-gtk.c, rangetab.c, nt.c, mule-coding.c, minibuf.c, menubar-msw.c, menubar.c, menubar-gtk.c, lread.c, lisp.h, gutter.c, glyphs.c, glyphs-widget.c, fns.c, fileio.c, file-coding.c, specifier.c: Eliminate EXTERNAL_LIST_LOOP, which does not check for circularities. Use EXTERNAL_LIST_LOOP_2 instead or EXTERNAL_LIST_LOOP_3 or EXTERNAL_PROPERTY_LIST_LOOP_3 or GC_EXTERNAL_LIST_LOOP_2 (new macro). Removed/redid comments on EXTERNAL_LIST_LOOP. --------------------------------------------------------------- SPACING FIXES --------------------------------------------------------------- callint.c, hftctl.c, number-gmp.c, process-unix.c: Spacing fixes. --------------------------------------------------------------- FIX FOR GEOMETRY PROBLEM IN FIRST FRAME --------------------------------------------------------------- unicode.c: Add workaround for newlib bug in sscanf() [should be fixed by release 1.5.12 of Cygwin]. toolbar.c: bug fix for problem of initial frame being 77 chars wide on Windows. will be overridden by my other ws. --------------------------------------------------------------- FIX FOR LEAKING PROCESS HANDLES: --------------------------------------------------------------- process-nt.c: Fixes for leaking handles. Inspired by work done by Adrian Aichner <adrian@xemacs.org>. --------------------------------------------------------------- FIX FOR CYGWIN BUG (Unicode-related): --------------------------------------------------------------- unicode.c: Add workaround for newlib bug in sscanf() [should be fixed by release 1.5.12 of Cygwin]. --------------------------------------------------------------- WARNING FIXES: --------------------------------------------------------------- console-stream.c: `reinit' is unused. compiler.h, event-msw.c, frame-msw.c, intl-encap-win32.c, text.h: Add stuff to deal with ANSI-aliasing warnings I got. regex.c: Gather includes together to avoid warning. --------------------------------------------------------------- CHANGES TO INITIALIZATION ROUTINES: --------------------------------------------------------------- buffer.c, emacs.c, console.c, debug.c, device-x.c, device.c, dragdrop.c, emodules.c, eval.c, event-Xt.c, event-gtk.c, event-msw.c, event-stream.c, event-tty.c, events.c, extents.c, faces.c, file-coding.c, fileio.c, font-lock.c, frame-msw.c, glyphs-widget.c, glyphs.c, gui-x.c, insdel.c, lread.c, lstream.c, menubar-gtk.c, menubar-x.c, minibuf.c, mule-wnnfns.c, objects-msw.c, objects.c, print.c, scrollbar-x.c, search.c, select-x.c, text.c, undo.c, unicode.c, window.c, symsinit.h: Call reinit_*() functions directly from emacs.c, for clarity. Factor out some redundant init code. Move disallowed stuff that had crept into vars_of_glyphs() into complex_vars_of_glyphs(). Call init_eval_semi_early() from eval.c not in the middle of vars_of_() in emacs.c since there should be no order dependency in the latter calls. --------------------------------------------------------------- ARMAGEDDON: --------------------------------------------------------------- alloc.c, emacs.c, lisp.h, print.c: Rename inhibit_non_essential_printing_operations to inhibit_non_essential_conversion_operations. text.c: Assert on !inhibit_non_essential_conversion_operations. console-msw.c, print.c: Don't do conversion in SetConsoleTitle or FindWindow to avoid problems during armageddon. Put #errors for NON_ASCII_INTERNAL_FORMAT in places where problems would arise. --------------------------------------------------------------- CHANGES TO THE BUILD PROCEDURE: --------------------------------------------------------------- config.h.in, s/cxux.h, s/usg5-4-2.h, m/powerpc.h: Add comment about correct ordering of this file. Rearrange everything to follow this -- put all #undefs together and before the s&m files. Add undefs for HAVE_ALLOCA, C_ALLOCA, BROKEN_ALLOCA_IN_FUNCTION_CALLS, STACK_DIRECTION. Remove unused HAVE_STPCPY, HAVE_GETWD, HAVE_SETLOCALE. m/gec63.h: Deleted; totally broken, not used at all, not in FSF. m/7300.h, m/acorn.h, m/alliant-2800.h, m/alliant.h, m/altos.h, m/amdahl.h, m/apollo.h, m/att3b.h, m/aviion.h, m/celerity.h, m/clipper.h, m/cnvrgnt.h, m/convex.h, m/cydra5.h, m/delta.h, m/delta88k.h, m/dpx2.h, m/elxsi.h, m/ews4800r.h, m/gould.h, m/hp300bsd.h, m/hp800.h, m/hp9000s300.h, m/i860.h, m/ibmps2-aix.h, m/ibmrs6000.h, m/ibmrt-aix.h, m/ibmrt.h, m/intel386.h, m/iris4d.h, m/iris5d.h, m/iris6d.h, m/irist.h, m/isi-ov.h, m/luna88k.h, m/m68k.h, m/masscomp.h, m/mg1.h, m/mips-nec.h, m/mips-siemens.h, m/mips.h, m/news.h, m/nh3000.h, m/nh4000.h, m/ns32000.h, m/orion105.h, m/pfa50.h, m/plexus.h, m/pmax.h, m/powerpc.h, m/pyrmips.h, m/sequent-ptx.h, m/sequent.h, m/sgi-challenge.h, m/symmetry.h, m/tad68k.h, m/tahoe.h, m/targon31.h, m/tekxd88.h, m/template.h, m/tower32.h, m/tower32v3.h, m/ustation.h, m/vax.h, m/wicat.h, m/xps100.h: Delete C_ALLOCA, HAVE_ALLOCA, STACK_DIRECTION, BROKEN_ALLOCA_IN_FUNCTION_CALLS. All of this is auto-detected. When in doubt, I followed recent FSF sources, which also have these things deleted.
author ben
date Thu, 04 Nov 2004 23:08:28 +0000
parents 4542b72c005e
children 3889ef128488 308d34e9f07d
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1 /* Heap management routines for XEmacs on Windows NT.
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2 Copyright (C) 1994 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 Geoff Voelker (voelker@cs.washington.edu) 7-29-94 */
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22
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23 /* Adapted for XEmacs by David Hobley <david@spook-le0.cia.com.au> */
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24 /* Synced with FSF Emacs 19.34.6 by Marc Paquette <marcpa@cam.org>
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25 (Note: Sync messages from Marc Paquette may indicate
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26 incomplete synching, so beware.)
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27 */
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29 /* This file has been Mule-ized, Ben Wing, 4-13-02. */
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31 #include <config.h>
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32 #include "lisp.h"
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34 #include "sysdep.h"
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35 #include "syswindows.h"
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37 /* This gives us the page size and the size of the allocation unit on NT. */
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38 SYSTEM_INFO sysinfo_cache;
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39 unsigned long syspage_mask = 0;
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40
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41 /* These are defined to get Emacs to compile, but are not used. */
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42 int edata;
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43 int etext;
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44
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45 /* Cache information describing the NT system for later use. */
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46 void
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47 cache_system_info (void)
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48 {
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49 /* Cache page size, allocation unit, processor type, etc. */
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50 GetSystemInfo (&sysinfo_cache);
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51 syspage_mask = sysinfo_cache.dwPageSize - 1;
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52 }
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53
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54 /* Round ADDRESS up to be aligned with ALIGN. */
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55 URawbyte *
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56 round_to_next (URawbyte *address, unsigned long align)
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57 {
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58 unsigned long tmp;
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59
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60 tmp = (unsigned long) address;
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61 tmp = (tmp + align - 1) / align;
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62
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63 return (URawbyte *) (tmp * align);
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64 }
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66 /* Info for keeping track of our heap. */
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67 URawbyte *data_region_base = UNINIT_PTR;
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68 URawbyte *data_region_end = UNINIT_PTR;
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69 URawbyte *real_data_region_end = UNINIT_PTR;
428
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70 unsigned long data_region_size = UNINIT_LONG;
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71 unsigned long reserved_heap_size = UNINIT_LONG;
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72
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73 /* The start of the data segment. */
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74 URawbyte *
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75 get_data_start (void)
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76 {
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77 return data_region_base;
3ecd8885ac67 Import from CVS: tag r21-2-22
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78 }
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79
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80 /* The end of the data segment. */
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81 URawbyte *
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82 get_data_end (void)
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83 {
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84 return data_region_end;
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85 }
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86
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87 static URawbyte *
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88 allocate_heap (void)
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89 {
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90 /* The base address for our GNU malloc heap is chosen in conjunction
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91 with the link settings for temacs.exe which control the stack size,
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92 the initial default process heap size and the executable image base
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93 address. The link settings and the malloc heap base below must all
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94 correspond; the relationship between these values depends on how NT
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95 and Win95 arrange the virtual address space for a process (and on
3ecd8885ac67 Import from CVS: tag r21-2-22
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96 the size of the code and data segments in temacs.exe).
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97
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98 The most important thing is to make base address for the executable
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99 image high enough to leave enough room between it and the 4MB floor
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100 of the process address space on Win95 for the primary thread stack,
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101 the process default heap, and other assorted odds and ends
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102 (eg. environment strings, private system dll memory etc) that are
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103 allocated before temacs has a chance to grab its malloc arena. The
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104 malloc heap base can then be set several MB higher than the
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105 executable image base, leaving enough room for the code and data
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106 segments.
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107
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108 Because some parts of Emacs can use rather a lot of stack space
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109 (for instance, the regular expression routines can potentially
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110 allocate several MB of stack space) we allow 8MB for the stack.
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111
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112 Allowing 1MB for the default process heap, and 1MB for odds and
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113 ends, we can base the executable at 16MB and still have a generous
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114 safety margin. At the moment, the executable has about 810KB of
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115 code (for x86) and about 550KB of data - on RISC platforms the code
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116 size could be roughly double, so if we allow 4MB for the executable
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117 we will have plenty of room for expansion.
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118
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119 Thus we would like to set the malloc heap base to 20MB. However,
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120 Win95 refuses to allocate the heap starting at this address, so we
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121 set the base to 27MB to make it happy. Since Emacs now leaves
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122 28 bits available for pointers, this lets us use the remainder of
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123 the region below the 256MB line for our malloc arena - 229MB is
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124 still a pretty decent arena to play in! */
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125
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126 unsigned long base = 0x01B00000; /* 27MB */
438
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127 /* Temporary hack for the non-starting problem - use 28 (256Mb) rather than VALBITS (1Gb) */
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128 unsigned long end = 1 << 28; /* 256MB */
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129 void *ptr = NULL;
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130
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131 #define NTHEAP_PROBE_BASE 1
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132 #if NTHEAP_PROBE_BASE /* This is never normally defined */
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133 /* Try various addresses looking for one the kernel will let us have. */
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134 while (!ptr && (base < end))
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135 {
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136 reserved_heap_size = end - base;
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137 ptr = VirtualAlloc ((void *) base,
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138 get_reserved_heap_size (),
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139 MEM_RESERVE,
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140 PAGE_NOACCESS);
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141 base += 0x00100000; /* 1MB increment */
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142 }
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143 #else
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144 reserved_heap_size = end - base;
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145 ptr = VirtualAlloc ((void *) base,
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146 get_reserved_heap_size (),
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147 MEM_RESERVE,
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148 PAGE_NOACCESS);
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149 #endif
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150
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151 return (URawbyte *) ptr;
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152 }
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153
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154
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155 /* Emulate Unix sbrk. */
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156 void *
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157 sbrk (unsigned long increment)
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158 {
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159 void *result;
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160 long size = (long) increment;
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161
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162 /* Allocate our heap if we haven't done so already. */
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163 if (data_region_base == UNINIT_PTR)
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164 {
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165 data_region_base = allocate_heap ();
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166 if (!data_region_base)
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167 return NULL;
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168
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169 data_region_end = data_region_base;
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170 real_data_region_end = data_region_end;
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171 data_region_size = get_reserved_heap_size ();
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172 }
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173
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174 result = data_region_end;
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175
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176 /* If size is negative, shrink the heap by decommitting pages. */
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177 if (size < 0)
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178 {
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179 int new_size;
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180 URawbyte *new_data_region_end;
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181
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182 size = -size;
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183
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184 /* Sanity checks. */
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185 if ((data_region_end - size) < data_region_base)
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186 return NULL;
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187
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188 /* We can only decommit full pages, so allow for
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189 partial deallocation [cga]. */
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190 new_data_region_end = (data_region_end - size);
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191 new_data_region_end = (URawbyte *)
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192 ((long) (new_data_region_end + syspage_mask) & ~syspage_mask);
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193 new_size = real_data_region_end - new_data_region_end;
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194 real_data_region_end = new_data_region_end;
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195 if (new_size > 0)
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196 {
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197 /* Decommit size bytes from the end of the heap. */
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198 if (!VirtualFree (real_data_region_end, new_size, MEM_DECOMMIT))
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199 return NULL;
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200 }
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201
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202 data_region_end -= size;
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203 }
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204 /* If size is positive, grow the heap by committing reserved pages. */
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205 else if (size > 0)
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206 {
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207 /* Sanity checks. */
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208 if ((data_region_end + size) >
3ecd8885ac67 Import from CVS: tag r21-2-22
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209 (data_region_base + get_reserved_heap_size ()))
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210 return NULL;
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211
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212 /* Commit more of our heap. */
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213 if (VirtualAlloc (data_region_end, size, MEM_COMMIT,
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214 PAGE_READWRITE) == NULL)
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215 return NULL;
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216 data_region_end += size;
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217
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218 /* We really only commit full pages, so record where
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219 the real end of committed memory is [cga]. */
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220 real_data_region_end = (URawbyte *)
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221 ((long) (data_region_end + syspage_mask) & ~syspage_mask);
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222 }
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223
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224 return result;
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225 }
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226
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227 #if !defined (HEAP_IN_DATA) && !defined (PDUMP)
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228
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229 /* Recreate the heap from the data that was dumped to the executable.
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230 EXECUTABLE_PATH tells us where to find the executable. */
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231 void
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232 recreate_heap (Extbyte *executable_path)
428
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233 {
442
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234 /* First reserve the upper part of our heap. (We reserve first
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235 because there have been problems in the past where doing the
abe6d1db359e Import from CVS: tag r21-2-36
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236 mapping first has loaded DLLs into the VA space of our heap.) */
428
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237
442
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238 /* Query the region at the end of the committed heap */
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239 void *tmp;
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240 MEMORY_BASIC_INFORMATION info;
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241 DWORD size;
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242 URawbyte *base = get_heap_end ();
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243 URawbyte *end =
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244 base + get_reserved_heap_size () - get_committed_heap_size ();
647
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245 VirtualQuery (base, &info, sizeof (info));
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246 if (info.State != MEM_FREE)
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247 {
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248 /* Oops, something has already reserved or commited it, nothing
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249 we can do but exit */
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250 Extbyte buf[256];
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251 sprintf (buf,
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252 "XEmacs cannot start because the memory region required "
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253 "by the heap is not available.\n"
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254 "(BaseAddress = 0x%lx, AllocationBase = 0x%lx, "
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255 "Size = 0x%lx, State = %s, Type = %s)",
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256 info.BaseAddress, info.AllocationBase, info.RegionSize,
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257 info.State == MEM_COMMIT ? "COMMITED" : "RESERVED",
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258 info.Type == MEM_IMAGE ? "IMAGE" :
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259 info.Type == MEM_MAPPED ? "MAPPED" : "PRIVATE");
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260 MessageBoxA (NULL, buf, "XEmacs", MB_OK | MB_ICONSTOP);
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261 exit(1);
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262 }
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263
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264 /* Now try and reserve as much as possible */
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265 size = min (info.RegionSize, (DWORD) (end - base));
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266 tmp = VirtualAlloc (base, size, MEM_RESERVE, PAGE_NOACCESS);
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267 if (!tmp)
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268 {
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269 /* Can't reserve it, nothing we can do but exit */
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270 Extbyte buf[256];
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271 sprintf (buf,
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272 "XEmacs cannot start because it couldn't reserve space "
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273 "required for the heap.\n"
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274 "(VirtualAlloc at 0x%lx of 0x%lx failed (%d))",
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275 base, size, GetLastError());
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276 MessageBoxA (NULL, buf, "XEmacs", MB_OK | MB_ICONSTOP);
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277 exit (1);
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278 }
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279
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280 /* We read in the data for the .bss section from the executable
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281 first and map in the heap from the executable second to prevent
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282 any funny interactions between file I/O and file mapping. */
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283 read_in_bss (executable_path);
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284 map_in_heap (executable_path);
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285
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286 /* Update system version information to match current system. */
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287 cache_system_info ();
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288 }
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289
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290 #endif /* !defined (HEAP_IN_DATA) && !defined (PDUMP) */
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291
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292 /* Round the heap up to the given alignment. */
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293 void
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294 round_heap (unsigned long align)
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295 {
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296 unsigned long needs_to_be;
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297 unsigned long need_to_alloc;
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298
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299 needs_to_be = (unsigned long) round_to_next (get_heap_end (), align);
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300 need_to_alloc = needs_to_be - (unsigned long) get_heap_end ();
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301
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302 if (need_to_alloc)
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303 sbrk (need_to_alloc);
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304 }
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305
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306 #if ((_MSC_VER >= 1000) && (_MSC_VER < 1300))
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307
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308 /* MSVC 4.2 invokes these functions from mainCRTStartup to initialize
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309 a heap via HeapCreate. They are normally defined by the runtime,
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310 but we override them here so that the unnecessary HeapCreate call
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311 is not performed. */
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312
707
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313 /* MSVC 7.0 does not allow you to redefine _heap_init or _heap_term. */
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314
428
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315 int __cdecl
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316 _heap_init (void)
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317 {
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318 /* Stepping through the assembly indicates that mainCRTStartup is
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319 expecting a nonzero success return value. */
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320 return 1;
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321 }
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322
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323 void __cdecl
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324 _heap_term (void)
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325 {
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326 return;
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327 }
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328
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329 #endif