Mercurial > hg > xemacs-beta
annotate src/ntheap.c @ 5464:e79916901603 r21-5-30
XEmacs 21.5.30 "garlic" is released.
| author | Stephen J. Turnbull <stephen@xemacs.org> |
|---|---|
| date | Wed, 27 Apr 2011 01:24:28 +0900 |
| parents | 3889ef128488 |
| children | 4dee0387b9de |
| rev | line source |
|---|---|
| 428 | 1 /* Heap management routines for XEmacs on Windows NT. |
| 2 Copyright (C) 1994 Free Software Foundation, Inc. | |
| 3 | |
| 4 This file is part of XEmacs. | |
| 5 | |
| 6 XEmacs is free software; you can redistribute it and/or modify it | |
| 7 under the terms of the GNU General Public License as published by the | |
| 8 Free Software Foundation; either version 2, or (at your option) any | |
| 9 later version. | |
| 10 | |
| 11 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License | |
| 17 along with XEmacs; see the file COPYING. If not, write to the Free | |
| 18 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
| 19 02111-1307, USA. | |
| 20 | |
| 21 Geoff Voelker (voelker@cs.washington.edu) 7-29-94 */ | |
| 22 | |
| 23 /* Adapted for XEmacs by David Hobley <david@spook-le0.cia.com.au> */ | |
| 771 | 24 /* Synced with FSF Emacs 19.34.6 by Marc Paquette <marcpa@cam.org> |
| 25 (Note: Sync messages from Marc Paquette may indicate | |
| 26 incomplete synching, so beware.) | |
| 27 */ | |
| 428 | 28 |
| 814 | 29 /* This file has been Mule-ized, Ben Wing, 4-13-02. */ |
| 30 | |
| 428 | 31 #include <config.h> |
| 771 | 32 #include "lisp.h" |
| 428 | 33 |
| 814 | 34 #include "sysdep.h" |
| 771 | 35 #include "syswindows.h" |
| 428 | 36 |
| 37 /* This gives us the page size and the size of the allocation unit on NT. */ | |
| 38 SYSTEM_INFO sysinfo_cache; | |
| 39 unsigned long syspage_mask = 0; | |
| 40 | |
| 41 /* These are defined to get Emacs to compile, but are not used. */ | |
| 42 int edata; | |
| 43 int etext; | |
| 44 | |
| 45 /* Cache information describing the NT system for later use. */ | |
| 46 void | |
| 47 cache_system_info (void) | |
| 48 { | |
| 49 /* Cache page size, allocation unit, processor type, etc. */ | |
| 50 GetSystemInfo (&sysinfo_cache); | |
| 51 syspage_mask = sysinfo_cache.dwPageSize - 1; | |
| 52 } | |
| 53 | |
| 54 /* Round ADDRESS up to be aligned with ALIGN. */ | |
| 2367 | 55 URawbyte * |
| 56 round_to_next (URawbyte *address, unsigned long align) | |
| 428 | 57 { |
| 58 unsigned long tmp; | |
| 59 | |
| 60 tmp = (unsigned long) address; | |
| 61 tmp = (tmp + align - 1) / align; | |
| 62 | |
| 2367 | 63 return (URawbyte *) (tmp * align); |
| 428 | 64 } |
| 65 | |
| 66 /* Info for keeping track of our heap. */ | |
| 2367 | 67 URawbyte *data_region_base = UNINIT_PTR; |
| 68 URawbyte *data_region_end = UNINIT_PTR; | |
| 69 URawbyte *real_data_region_end = UNINIT_PTR; | |
| 428 | 70 unsigned long data_region_size = UNINIT_LONG; |
| 71 unsigned long reserved_heap_size = UNINIT_LONG; | |
| 72 | |
| 73 /* The start of the data segment. */ | |
| 2367 | 74 URawbyte * |
| 428 | 75 get_data_start (void) |
| 76 { | |
| 77 return data_region_base; | |
| 78 } | |
| 79 | |
| 80 /* The end of the data segment. */ | |
| 2367 | 81 URawbyte * |
| 428 | 82 get_data_end (void) |
| 83 { | |
| 84 return data_region_end; | |
| 85 } | |
| 86 | |
| 2367 | 87 static URawbyte * |
| 428 | 88 allocate_heap (void) |
| 89 { | |
| 90 /* The base address for our GNU malloc heap is chosen in conjunction | |
| 91 with the link settings for temacs.exe which control the stack size, | |
| 92 the initial default process heap size and the executable image base | |
| 93 address. The link settings and the malloc heap base below must all | |
| 94 correspond; the relationship between these values depends on how NT | |
| 95 and Win95 arrange the virtual address space for a process (and on | |
| 96 the size of the code and data segments in temacs.exe). | |
| 97 | |
| 98 The most important thing is to make base address for the executable | |
| 99 image high enough to leave enough room between it and the 4MB floor | |
| 100 of the process address space on Win95 for the primary thread stack, | |
| 101 the process default heap, and other assorted odds and ends | |
| 102 (eg. environment strings, private system dll memory etc) that are | |
| 103 allocated before temacs has a chance to grab its malloc arena. The | |
| 104 malloc heap base can then be set several MB higher than the | |
| 105 executable image base, leaving enough room for the code and data | |
| 106 segments. | |
| 107 | |
| 108 Because some parts of Emacs can use rather a lot of stack space | |
| 109 (for instance, the regular expression routines can potentially | |
| 110 allocate several MB of stack space) we allow 8MB for the stack. | |
| 111 | |
| 112 Allowing 1MB for the default process heap, and 1MB for odds and | |
| 113 ends, we can base the executable at 16MB and still have a generous | |
| 114 safety margin. At the moment, the executable has about 810KB of | |
| 115 code (for x86) and about 550KB of data - on RISC platforms the code | |
| 116 size could be roughly double, so if we allow 4MB for the executable | |
| 117 we will have plenty of room for expansion. | |
| 118 | |
| 119 Thus we would like to set the malloc heap base to 20MB. However, | |
| 120 Win95 refuses to allocate the heap starting at this address, so we | |
| 121 set the base to 27MB to make it happy. Since Emacs now leaves | |
| 122 28 bits available for pointers, this lets us use the remainder of | |
| 123 the region below the 256MB line for our malloc arena - 229MB is | |
| 124 still a pretty decent arena to play in! */ | |
| 125 | |
| 126 unsigned long base = 0x01B00000; /* 27MB */ | |
| 438 | 127 /* Temporary hack for the non-starting problem - use 28 (256Mb) rather than VALBITS (1Gb) */ |
| 128 unsigned long end = 1 << 28; /* 256MB */ | |
| 428 | 129 void *ptr = NULL; |
| 130 | |
| 131 #define NTHEAP_PROBE_BASE 1 | |
| 132 #if NTHEAP_PROBE_BASE /* This is never normally defined */ | |
| 133 /* Try various addresses looking for one the kernel will let us have. */ | |
| 134 while (!ptr && (base < end)) | |
| 135 { | |
| 136 reserved_heap_size = end - base; | |
| 137 ptr = VirtualAlloc ((void *) base, | |
| 138 get_reserved_heap_size (), | |
| 139 MEM_RESERVE, | |
| 140 PAGE_NOACCESS); | |
| 141 base += 0x00100000; /* 1MB increment */ | |
| 142 } | |
| 143 #else | |
| 144 reserved_heap_size = end - base; | |
| 145 ptr = VirtualAlloc ((void *) base, | |
| 146 get_reserved_heap_size (), | |
| 147 MEM_RESERVE, | |
| 148 PAGE_NOACCESS); | |
| 149 #endif | |
| 150 | |
| 2367 | 151 return (URawbyte *) ptr; |
| 428 | 152 } |
| 153 | |
| 154 | |
| 155 /* Emulate Unix sbrk. */ | |
| 156 void * | |
| 157 sbrk (unsigned long increment) | |
| 158 { | |
| 159 void *result; | |
| 160 long size = (long) increment; | |
| 161 | |
| 162 /* Allocate our heap if we haven't done so already. */ | |
| 163 if (data_region_base == UNINIT_PTR) | |
| 164 { | |
| 165 data_region_base = allocate_heap (); | |
| 166 if (!data_region_base) | |
| 167 return NULL; | |
| 168 | |
| 169 data_region_end = data_region_base; | |
| 170 real_data_region_end = data_region_end; | |
| 171 data_region_size = get_reserved_heap_size (); | |
| 172 } | |
| 173 | |
| 174 result = data_region_end; | |
| 175 | |
| 176 /* If size is negative, shrink the heap by decommitting pages. */ | |
| 177 if (size < 0) | |
| 178 { | |
| 179 int new_size; | |
| 2367 | 180 URawbyte *new_data_region_end; |
| 428 | 181 |
| 182 size = -size; | |
| 183 | |
| 184 /* Sanity checks. */ | |
| 185 if ((data_region_end - size) < data_region_base) | |
| 186 return NULL; | |
| 187 | |
| 188 /* We can only decommit full pages, so allow for | |
| 189 partial deallocation [cga]. */ | |
| 190 new_data_region_end = (data_region_end - size); | |
| 2367 | 191 new_data_region_end = (URawbyte *) |
| 428 | 192 ((long) (new_data_region_end + syspage_mask) & ~syspage_mask); |
| 193 new_size = real_data_region_end - new_data_region_end; | |
| 194 real_data_region_end = new_data_region_end; | |
| 195 if (new_size > 0) | |
| 196 { | |
| 197 /* Decommit size bytes from the end of the heap. */ | |
| 198 if (!VirtualFree (real_data_region_end, new_size, MEM_DECOMMIT)) | |
| 199 return NULL; | |
| 200 } | |
| 201 | |
| 202 data_region_end -= size; | |
| 203 } | |
| 204 /* If size is positive, grow the heap by committing reserved pages. */ | |
| 205 else if (size > 0) | |
| 206 { | |
| 207 /* Sanity checks. */ | |
| 208 if ((data_region_end + size) > | |
| 209 (data_region_base + get_reserved_heap_size ())) | |
| 210 return NULL; | |
| 211 | |
| 212 /* Commit more of our heap. */ | |
| 213 if (VirtualAlloc (data_region_end, size, MEM_COMMIT, | |
| 214 PAGE_READWRITE) == NULL) | |
| 215 return NULL; | |
| 216 data_region_end += size; | |
| 217 | |
| 218 /* We really only commit full pages, so record where | |
| 219 the real end of committed memory is [cga]. */ | |
| 2367 | 220 real_data_region_end = (URawbyte *) |
| 428 | 221 ((long) (data_region_end + syspage_mask) & ~syspage_mask); |
| 222 } | |
| 223 | |
| 224 return result; | |
| 225 } | |
| 226 | |
| 1330 | 227 #if !defined (HEAP_IN_DATA) && !defined (PDUMP) |
| 428 | 228 |
| 229 /* Recreate the heap from the data that was dumped to the executable. | |
| 230 EXECUTABLE_PATH tells us where to find the executable. */ | |
| 231 void | |
| 814 | 232 recreate_heap (Extbyte *executable_path) |
| 428 | 233 { |
| 442 | 234 /* First reserve the upper part of our heap. (We reserve first |
| 235 because there have been problems in the past where doing the | |
| 236 mapping first has loaded DLLs into the VA space of our heap.) */ | |
| 428 | 237 |
| 442 | 238 /* Query the region at the end of the committed heap */ |
| 239 void *tmp; | |
| 240 MEMORY_BASIC_INFORMATION info; | |
| 241 DWORD size; | |
| 2367 | 242 URawbyte *base = get_heap_end (); |
| 243 URawbyte *end = | |
| 814 | 244 base + get_reserved_heap_size () - get_committed_heap_size (); |
| 647 | 245 VirtualQuery (base, &info, sizeof (info)); |
| 442 | 246 if (info.State != MEM_FREE) |
| 814 | 247 { |
|
5384
3889ef128488
Fix misspelled words, and some grammar, across the entire source tree.
Jerry James <james@xemacs.org>
parents:
2367
diff
changeset
|
248 /* Oops, something has already reserved or committed it, nothing |
| 814 | 249 we can do but exit */ |
| 250 Extbyte buf[256]; | |
| 251 sprintf (buf, | |
| 252 "XEmacs cannot start because the memory region required " | |
| 253 "by the heap is not available.\n" | |
| 254 "(BaseAddress = 0x%lx, AllocationBase = 0x%lx, " | |
| 255 "Size = 0x%lx, State = %s, Type = %s)", | |
| 256 info.BaseAddress, info.AllocationBase, info.RegionSize, | |
|
5384
3889ef128488
Fix misspelled words, and some grammar, across the entire source tree.
Jerry James <james@xemacs.org>
parents:
2367
diff
changeset
|
257 info.State == MEM_COMMIT ? "COMMITTED" : "RESERVED", |
| 814 | 258 info.Type == MEM_IMAGE ? "IMAGE" : |
| 259 info.Type == MEM_MAPPED ? "MAPPED" : "PRIVATE"); | |
| 260 MessageBoxA (NULL, buf, "XEmacs", MB_OK | MB_ICONSTOP); | |
| 261 exit(1); | |
| 262 } | |
| 442 | 263 |
| 264 /* Now try and reserve as much as possible */ | |
| 647 | 265 size = min (info.RegionSize, (DWORD) (end - base)); |
| 442 | 266 tmp = VirtualAlloc (base, size, MEM_RESERVE, PAGE_NOACCESS); |
| 428 | 267 if (!tmp) |
| 814 | 268 { |
| 269 /* Can't reserve it, nothing we can do but exit */ | |
| 270 Extbyte buf[256]; | |
| 271 sprintf (buf, | |
| 272 "XEmacs cannot start because it couldn't reserve space " | |
| 273 "required for the heap.\n" | |
| 274 "(VirtualAlloc at 0x%lx of 0x%lx failed (%d))", | |
| 275 base, size, GetLastError()); | |
| 276 MessageBoxA (NULL, buf, "XEmacs", MB_OK | MB_ICONSTOP); | |
| 277 exit (1); | |
| 278 } | |
| 428 | 279 |
| 280 /* We read in the data for the .bss section from the executable | |
| 281 first and map in the heap from the executable second to prevent | |
| 282 any funny interactions between file I/O and file mapping. */ | |
| 283 read_in_bss (executable_path); | |
| 284 map_in_heap (executable_path); | |
| 285 | |
| 286 /* Update system version information to match current system. */ | |
| 287 cache_system_info (); | |
| 288 } | |
| 1330 | 289 |
| 290 #endif /* !defined (HEAP_IN_DATA) && !defined (PDUMP) */ | |
| 428 | 291 |
| 292 /* Round the heap up to the given alignment. */ | |
| 293 void | |
| 294 round_heap (unsigned long align) | |
| 295 { | |
| 296 unsigned long needs_to_be; | |
| 297 unsigned long need_to_alloc; | |
| 298 | |
| 299 needs_to_be = (unsigned long) round_to_next (get_heap_end (), align); | |
| 300 need_to_alloc = needs_to_be - (unsigned long) get_heap_end (); | |
| 301 | |
| 302 if (need_to_alloc) | |
| 303 sbrk (need_to_alloc); | |
| 304 } | |
| 305 | |
| 707 | 306 #if ((_MSC_VER >= 1000) && (_MSC_VER < 1300)) |
| 428 | 307 |
| 308 /* MSVC 4.2 invokes these functions from mainCRTStartup to initialize | |
| 309 a heap via HeapCreate. They are normally defined by the runtime, | |
| 310 but we override them here so that the unnecessary HeapCreate call | |
| 311 is not performed. */ | |
| 312 | |
| 707 | 313 /* MSVC 7.0 does not allow you to redefine _heap_init or _heap_term. */ |
| 314 | |
| 428 | 315 int __cdecl |
| 316 _heap_init (void) | |
| 317 { | |
| 318 /* Stepping through the assembly indicates that mainCRTStartup is | |
| 319 expecting a nonzero success return value. */ | |
| 320 return 1; | |
| 321 } | |
| 322 | |
| 323 void __cdecl | |
| 324 _heap_term (void) | |
| 325 { | |
| 326 return; | |
| 327 } | |
| 328 | |
| 329 #endif |