Mercurial > hg > xemacs-beta
annotate src/free-hook.c @ 5554:a42e686a01bf
Automated merge with file:///Sources/xemacs-21.5-checked-out
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Wed, 24 Aug 2011 11:07:26 +0100 |
| parents | 308d34e9f07d |
| children | 56144c8593a8 |
| rev | line source |
|---|---|
|
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make lrecord UID's have a separate UID space for each object, resurrect debug SOE code in extents.c
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1 /* Copyright (C) 2010 Ben Wing. |
|
88bd4f3ef8e4
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2 This file is part of XEmacs. |
| 428 | 3 |
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4 XEmacs is free software: you can redistribute it and/or modify it |
| 428 | 5 under the terms of the GNU General Public License as published by the |
|
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6 Free Software Foundation, either version 3 of the License, or (at your |
|
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7 option) any later version. |
| 428 | 8 |
| 9 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 for more details. | |
| 13 | |
| 14 You should have received a copy of the GNU General Public License | |
|
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15 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 428 | 16 |
| 17 /* Synched up with: Not in FSF. */ | |
| 18 | |
| 19 /* Debugging hooks for malloc. */ | |
| 20 | |
| 21 /* These hooks work with gmalloc to catch allocation errors. | |
| 22 In particular, the following is trapped: | |
| 23 | |
| 24 * Freeing the same pointer twice. | |
| 25 * Trying to free a pointer not returned by malloc. | |
| 26 * Trying to realloc a pointer not returned by malloc. | |
| 27 | |
|
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28 In addition, every word of every block freed is set to 0xDEADBEEF |
| 1204 | 29 (-559038737). This causes many uses of freed storage to be trapped or |
| 30 recognized. | |
| 428 | 31 |
| 32 When you use this, the storage used by the last FREE_QUEUE_LIMIT | |
| 33 calls to free() is not recycled. When you call free for the Nth | |
| 34 time, the (N - FREE_QUEUE_LIMIT)'th block is actually recycled. | |
| 35 | |
| 36 For these last FREE_QUEUE_LIMIT calls to free() a backtrace is | |
| 37 saved showing where it was called from. The function | |
| 38 find_backtrace() is provided here to be called from GDB with a | |
| 39 pointer (such as would be passed to free()) as argument, e.g. | |
| 40 (gdb) p/a *find_backtrace (0x234000). If SAVE_ARGS is defined, | |
| 41 the first three arguments to each function are saved as well as the | |
| 42 return addresses. | |
| 43 | |
| 44 If UNMAPPED_FREE is defined, instead of setting every word of freed | |
|
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parents:
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|
45 storage to 0xDEADBEEF, every call to malloc goes on its own page(s). |
| 428 | 46 When free() is called, the block is read and write protected. This |
| 47 is very useful when debugging, since it usually generates a bus error | |
|
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parents:
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48 when the DEADBEEF hack might only cause some garbage to be printed. |
| 428 | 49 However, this is too slow for everyday use, since it takes an enormous |
| 50 number of pages. | |
| 51 | |
| 52 | |
| 53 Some other features that would be useful are: | |
| 54 | |
| 55 * Checking for storage leaks. | |
| 56 This could be done by a GC-like facility that would scan the data | |
| 57 segment looking for pointers to allocated storage and tell you | |
| 58 about those that are no longer referenced. This could be invoked | |
| 59 at any time. Another possibility is to report on what allocated | |
| 60 storage is still in use when the process is exited. Typically | |
| 61 there will be a large amount, so this might not be very useful. | |
| 62 */ | |
| 63 | |
| 64 #ifdef emacs | |
| 65 #include <config.h> | |
| 66 #include "lisp.h" | |
| 67 #else | |
| 68 void *malloc (size_t); | |
| 69 #endif | |
| 70 | |
| 71 #if !defined(HAVE_LIBMCHECK) | |
| 72 #include <stdio.h> | |
| 73 | |
| 74 #include "hash.h" | |
| 75 | |
| 76 #ifdef UNMAPPED_FREE | |
| 77 #include <sys/mman.h> | |
| 78 #include <sys/param.h> | |
| 79 #define ROUND_UP_TO_PAGE(i) (((i) + PAGEOFFSET) & PAGEMASK) | |
| 80 #endif | |
| 81 | |
| 82 #include <sys/types.h> | |
| 83 | |
| 84 /* System function prototypes don't belong in C source files */ | |
| 85 /* extern void free (void *); */ | |
| 86 | |
| 87 static struct hash_table *pointer_table; | |
| 88 | |
| 89 extern void (*__free_hook) (void *); | |
| 90 extern void *(*__malloc_hook) (size_t); | |
| 91 | |
| 92 static void *check_malloc (size_t); | |
| 93 | |
| 94 typedef void (*fun_ptr) (void); | |
| 95 | |
| 96 /* free_queue is not too useful without backtrace logging */ | |
| 97 #define FREE_QUEUE_LIMIT 1 | |
| 98 #define TRACE_LIMIT 20 | |
| 99 | |
| 100 typedef struct { | |
| 101 fun_ptr return_pc; | |
| 102 #ifdef SAVE_ARGS | |
| 103 void *arg[3]; | |
| 104 #endif | |
| 105 } fun_entry; | |
| 106 | |
| 107 typedef struct { | |
| 108 void *address; | |
| 109 unsigned long length; | |
| 110 } free_queue_entry; | |
| 111 | |
| 112 static free_queue_entry free_queue[FREE_QUEUE_LIMIT]; | |
| 113 | |
| 114 static int current_free; | |
| 115 | |
| 116 static int strict_free_check; | |
| 117 | |
| 118 static void | |
| 119 check_free (void *ptr) | |
| 120 { | |
| 121 __free_hook = 0; | |
| 122 __malloc_hook = 0; | |
| 123 if (!pointer_table) | |
| 124 pointer_table = make_hash_table (max (100, FREE_QUEUE_LIMIT * 2)); | |
| 125 if (ptr != 0) | |
| 126 { | |
| 127 long size; | |
| 128 #ifdef UNMAPPED_FREE | |
| 129 unsigned long rounded_up_size; | |
| 130 #endif | |
| 131 | |
| 132 EMACS_INT present = (EMACS_INT) gethash (ptr, pointer_table, | |
| 2519 | 133 (const void **) |
| 134 (void *) &size); | |
| 428 | 135 |
| 136 if (!present) | |
| 137 { | |
| 138 /* This can only happen if you try to free something that didn't | |
| 139 come from malloc */ | |
| 140 #if !defined(__linux__) | |
| 141 /* I originally wrote: "There's really no need to drop core." | |
| 142 I have seen the error of my ways. -slb */ | |
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143 assert (!strict_free_check); |
| 428 | 144 #endif |
| 145 printf("Freeing unmalloc'ed memory at %p\n", ptr); | |
| 146 __free_hook = check_free; | |
| 147 __malloc_hook = check_malloc; | |
| 148 goto end; | |
| 149 } | |
| 150 | |
| 151 if (size < 0) | |
| 152 { | |
| 153 /* This happens when you free twice */ | |
| 154 #if !defined(__linux__) | |
| 155 /* See above comment. */ | |
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156 assert (!strict_free_check); |
| 428 | 157 #endif |
| 158 printf("Freeing %p twice\n", ptr); | |
| 159 __free_hook = check_free; | |
| 160 __malloc_hook = check_malloc; | |
| 161 goto end; | |
| 162 } | |
| 163 | |
| 164 puthash (ptr, (void *)-size, pointer_table); | |
| 165 #ifdef UNMAPPED_FREE | |
| 166 /* Round up size to an even number of pages. */ | |
| 167 rounded_up_size = ROUND_UP_TO_PAGE (size); | |
| 168 /* Protect the pages freed from all access */ | |
| 169 if (strict_free_check) | |
| 170 mprotect (ptr, rounded_up_size, PROT_NONE); | |
| 171 #else | |
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88bd4f3ef8e4
make lrecord UID's have a separate UID space for each object, resurrect debug SOE code in extents.c
Ben Wing <ben@xemacs.org>
parents:
5050
diff
changeset
|
172 /* Set every word in the block to 0xDEADBEEF */ |
| 428 | 173 if (strict_free_check) |
| 174 { | |
| 175 unsigned long long_length = (size + (sizeof (long) - 1)) | |
| 176 / sizeof (long); | |
| 177 unsigned long i; | |
| 178 | |
| 3988 | 179 /* Not using the DEADBEEF_CONSTANT #define, since we don't know |
| 180 * that allocation sizes will be multiples of eight. */ | |
| 428 | 181 for (i = 0; i < long_length; i++) |
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parents:
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182 ((unsigned long *) ptr)[i] = 0xDEADBEEF; |
| 428 | 183 } |
| 184 #endif | |
| 185 free_queue[current_free].address = ptr; | |
| 186 free_queue[current_free].length = size; | |
| 187 | |
| 188 current_free++; | |
| 189 if (current_free >= FREE_QUEUE_LIMIT) | |
| 190 current_free = 0; | |
| 191 /* Really free this if there's something there */ | |
| 192 { | |
| 193 void *old = free_queue[current_free].address; | |
| 194 | |
| 195 if (old) | |
| 196 { | |
| 197 #ifdef UNMAPPED_FREE | |
| 198 unsigned long old_len = free_queue[current_free].length; | |
| 199 | |
| 200 mprotect (old, old_len, PROT_READ | PROT_WRITE | PROT_EXEC); | |
| 201 #endif | |
| 202 free (old); | |
| 203 remhash (old, pointer_table); | |
| 204 } | |
| 205 } | |
| 206 } | |
| 207 __free_hook = check_free; | |
| 208 __malloc_hook = check_malloc; | |
| 209 | |
| 210 end: | |
| 211 return; | |
| 212 } | |
| 213 | |
| 214 static void * | |
| 215 check_malloc (size_t size) | |
| 216 { | |
| 217 size_t rounded_up_size; | |
| 218 void *result; | |
| 219 | |
| 220 __free_hook = 0; | |
| 221 __malloc_hook = 0; | |
| 222 if (size == 0) | |
| 223 { | |
| 224 result = 0; | |
| 225 goto end; | |
| 226 } | |
| 227 #ifdef UNMAPPED_FREE | |
| 228 /* Round up to an even number of pages. */ | |
| 229 rounded_up_size = ROUND_UP_TO_PAGE (size); | |
| 230 #else | |
| 231 rounded_up_size = size; | |
| 232 #endif | |
| 233 result = malloc (rounded_up_size); | |
| 234 if (!pointer_table) | |
| 235 pointer_table = make_hash_table (FREE_QUEUE_LIMIT * 2); | |
| 236 puthash (result, (void *)size, pointer_table); | |
| 237 __free_hook = check_free; | |
| 238 __malloc_hook = check_malloc; | |
| 239 end: | |
| 240 return result; | |
| 241 } | |
| 242 | |
| 243 extern void *(*__realloc_hook) (void *, size_t); | |
| 244 | |
| 245 #ifdef MIN | |
| 246 #undef MIN | |
| 247 #endif | |
| 248 #define MIN(A, B) ((A) < (B) ? (A) : (B)) | |
| 249 | |
| 250 /* Don't optimize realloc */ | |
| 251 | |
| 252 static void * | |
| 253 check_realloc (void * ptr, size_t size) | |
| 254 { | |
| 255 EMACS_INT present; | |
| 256 size_t old_size; | |
| 257 void *result = malloc (size); | |
| 258 | |
| 259 if (!ptr) return result; | |
| 442 | 260 present = (EMACS_INT) gethash (ptr, pointer_table, (const void **) &old_size); |
| 428 | 261 if (!present) |
| 262 { | |
| 263 /* This can only happen by reallocing a pointer that didn't | |
| 264 come from malloc. */ | |
| 265 #if !defined(__linux__) | |
| 266 /* see comment in check_free(). */ | |
| 2500 | 267 ABORT (); |
| 428 | 268 #endif |
| 269 printf("Realloc'ing unmalloc'ed pointer at %p\n", ptr); | |
| 270 } | |
| 271 | |
| 272 if (result == 0) | |
| 273 goto end; | |
| 274 memcpy (result, ptr, MIN (size, old_size)); | |
| 275 free (ptr); | |
| 276 end: | |
| 277 return result; | |
| 278 } | |
| 279 | |
| 280 void enable_strict_free_check (void); | |
| 281 void | |
| 282 enable_strict_free_check (void) | |
| 283 { | |
| 284 strict_free_check = 1; | |
| 285 } | |
| 286 | |
| 287 void disable_strict_free_check (void); | |
| 288 void | |
| 289 disable_strict_free_check (void) | |
| 290 { | |
| 291 strict_free_check = 0; | |
| 292 } | |
| 293 | |
| 294 /* Note: All BLOCK_INPUT stuff removed from this file because it's | |
| 295 completely gone in XEmacs */ | |
| 296 | |
| 297 static void * | |
| 298 block_input_malloc (size_t size); | |
| 299 | |
| 300 static void | |
| 301 block_input_free (void* ptr) | |
| 302 { | |
| 303 __free_hook = 0; | |
| 304 __malloc_hook = 0; | |
| 305 free (ptr); | |
| 306 __free_hook = block_input_free; | |
| 307 __malloc_hook = block_input_malloc; | |
| 308 } | |
| 309 | |
| 310 static void * | |
| 311 block_input_malloc (size_t size) | |
| 312 { | |
| 313 void* result; | |
| 314 __free_hook = 0; | |
| 315 __malloc_hook = 0; | |
| 316 result = malloc (size); | |
| 317 __free_hook = block_input_free; | |
| 318 __malloc_hook = block_input_malloc; | |
| 319 return result; | |
| 320 } | |
| 321 | |
| 322 | |
| 323 static void * | |
| 324 block_input_realloc (void* ptr, size_t size) | |
| 325 { | |
| 326 void* result; | |
| 327 __free_hook = 0; | |
| 328 __malloc_hook = 0; | |
| 329 __realloc_hook = 0; | |
| 330 result = realloc (ptr, size); | |
| 331 __free_hook = block_input_free; | |
| 332 __malloc_hook = block_input_malloc; | |
| 333 __realloc_hook = block_input_realloc; | |
| 334 return result; | |
| 335 } | |
| 336 | |
| 337 #ifdef emacs | |
| 338 | |
| 339 void disable_free_hook (void); | |
| 340 void | |
| 341 disable_free_hook (void) | |
| 342 { | |
| 343 __free_hook = block_input_free; | |
| 344 __malloc_hook = block_input_malloc; | |
| 345 __realloc_hook = block_input_realloc; | |
| 346 } | |
| 347 | |
| 348 void | |
| 349 init_free_hook (void) | |
| 350 { | |
| 351 __free_hook = check_free; | |
| 352 __malloc_hook = check_malloc; | |
| 353 __realloc_hook = check_realloc; | |
| 354 current_free = 0; | |
| 355 strict_free_check = 1; | |
| 356 } | |
| 357 | |
| 358 void really_free_one_entry (void *, int, int *); | |
| 359 | |
| 360 DEFUN ("really-free", Freally_free, 0, 1, "P", /* | |
| 361 Actually free the storage held by the free() debug hook. | |
| 362 A no-op if the free hook is disabled. | |
| 363 */ | |
| 2286 | 364 (UNUSED (arg))) |
| 428 | 365 { |
| 366 int count[2]; | |
| 367 Lisp_Object lisp_count[2]; | |
| 368 | |
| 369 if ((__free_hook != 0) && pointer_table) | |
| 370 { | |
| 371 count[0] = 0; | |
| 372 count[1] = 0; | |
| 373 __free_hook = 0; | |
| 374 maphash ((maphash_function)really_free_one_entry, | |
| 375 pointer_table, (void *)&count); | |
| 376 memset (free_queue, 0, sizeof (free_queue_entry) * FREE_QUEUE_LIMIT); | |
| 377 current_free = 0; | |
| 378 __free_hook = check_free; | |
| 793 | 379 lisp_count[0] = make_int (count[0]); |
| 380 lisp_count[1] = make_int (count[1]); | |
| 428 | 381 return Fcons (lisp_count[0], lisp_count[1]); |
| 382 } | |
| 383 else | |
| 384 return Fcons (make_int (0), make_int (0)); | |
| 385 } | |
| 386 | |
| 387 void | |
| 388 really_free_one_entry (void *key, int contents, int *countp) | |
| 389 { | |
| 390 if (contents < 0) | |
| 391 { | |
| 392 free (key); | |
| 393 #ifdef UNMAPPED_FREE | |
| 394 mprotect (key, -contents, PROT_READ | PROT_WRITE | PROT_EXEC); | |
| 395 #endif | |
| 396 remhash (key, pointer_table); | |
| 397 countp[0]++; | |
| 398 countp[1] += -contents; | |
| 399 } | |
| 400 } | |
| 401 | |
| 402 void | |
| 403 syms_of_free_hook (void) | |
| 404 { | |
| 405 DEFSUBR (Freally_free); | |
| 406 } | |
| 407 | |
| 408 #else | |
| 409 void (*__free_hook)(void *) = check_free; | |
| 410 void *(*__malloc_hook)(size_t) = check_malloc; | |
| 411 void *(*__realloc_hook)(void *, size_t) = check_realloc; | |
| 412 #endif | |
| 413 | |
| 414 #endif /* !defined(HAVE_LIBMCHECK) */ | |
| 415 | |
| 416 #if defined(DEBUG_INPUT_BLOCKING) || defined (DEBUG_GCPRO) | |
| 417 | |
| 418 /* Note: There is no more input blocking in XEmacs */ | |
| 419 typedef enum { | |
| 420 block_type, unblock_type, totally_type, | |
| 421 gcpro1_type, gcpro2_type, gcpro3_type, gcpro4_type, gcpro5_type, | |
| 422 ungcpro_type | |
| 423 } blocktype; | |
| 424 | |
| 425 struct block_input_history_struct | |
| 426 { | |
| 427 char *file; | |
| 428 int line; | |
| 429 blocktype type; | |
| 430 int value; | |
| 431 }; | |
| 432 | |
| 433 typedef struct block_input_history_struct block_input_history; | |
| 434 | |
| 435 #endif /* DEBUG_INPUT_BLOCKING || DEBUG_GCPRO */ | |
| 436 | |
| 437 #ifdef DEBUG_INPUT_BLOCKING | |
| 438 | |
| 439 int blhistptr; | |
| 440 | |
| 441 #define BLHISTLIMIT 1000 | |
| 442 | |
| 443 block_input_history blhist[BLHISTLIMIT]; | |
| 444 | |
| 445 note_block_input (char *file, int line) | |
| 446 { | |
| 447 note_block (file, line, block_type); | |
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448 assert (interrupt_input_blocked <= 2); |
| 428 | 449 } |
| 450 | |
| 451 note_unblock_input (char* file, int line) | |
| 452 { | |
| 453 note_block (file, line, unblock_type); | |
| 454 } | |
| 455 | |
| 456 note_totally_unblocked (char* file, int line) | |
| 457 { | |
| 458 note_block (file, line, totally_type); | |
| 459 } | |
| 460 | |
| 461 note_block (char *file, int line, blocktype type) | |
| 462 { | |
| 463 blhist[blhistptr].file = file; | |
| 464 blhist[blhistptr].line = line; | |
| 465 blhist[blhistptr].type = type; | |
| 466 blhist[blhistptr].value = interrupt_input_blocked; | |
| 467 | |
| 468 blhistptr++; | |
| 469 if (blhistptr >= BLHISTLIMIT) | |
| 470 blhistptr = 0; | |
| 471 } | |
| 472 | |
| 473 #endif /* DEBUG_INPUT_BLOCKING */ | |
| 474 | |
| 475 | |
| 476 #ifdef DEBUG_GCPRO | |
| 477 | |
| 478 int gcprohistptr; | |
| 479 #define GCPROHISTLIMIT 1000 | |
| 480 block_input_history gcprohist[GCPROHISTLIMIT]; | |
| 481 | |
| 482 static void | |
| 483 log_gcpro (char *file, int line, struct gcpro *value, blocktype type) | |
| 484 { | |
| 485 if (type == ungcpro_type) | |
| 486 { | |
| 487 if (value == gcprolist) goto OK; | |
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488 assert (gcprolist); |
| 428 | 489 if (value == gcprolist->next) goto OK; |
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parents:
3988
diff
changeset
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490 assert (gcprolist->next); |
| 428 | 491 if (value == gcprolist->next->next) goto OK; |
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parents:
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diff
changeset
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492 assert (gcprolist->next->next); |
| 428 | 493 if (value == gcprolist->next->next->next) goto OK; |
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diff
changeset
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494 assert (gcprolist->next->next->next); |
| 446 | 495 if (value == gcprolist->next->next->next->next) goto OK; |
| 2500 | 496 ABORT (); |
| 428 | 497 OK:; |
| 498 } | |
| 499 gcprohist[gcprohistptr].file = file; | |
| 500 gcprohist[gcprohistptr].line = line; | |
| 501 gcprohist[gcprohistptr].type = type; | |
| 502 gcprohist[gcprohistptr].value = (int) value; | |
| 503 gcprohistptr++; | |
| 504 if (gcprohistptr >= GCPROHISTLIMIT) | |
| 505 gcprohistptr = 0; | |
| 506 } | |
| 507 | |
| 508 void | |
| 509 debug_gcpro1 (char *file, int line, struct gcpro *gcpro1, Lisp_Object *var) | |
| 510 { | |
| 511 gcpro1->next = gcprolist; gcpro1->var = var; gcpro1->nvars = 1; | |
| 512 gcprolist = gcpro1; | |
| 513 log_gcpro (file, line, gcpro1, gcpro1_type); | |
| 514 } | |
| 515 | |
| 516 void | |
| 517 debug_gcpro2 (char *file, int line, struct gcpro *gcpro1, struct gcpro *gcpro2, | |
| 518 Lisp_Object *var1, Lisp_Object *var2) | |
| 519 { | |
| 520 gcpro1->next = gcprolist; gcpro1->var = var1; gcpro1->nvars = 1; | |
| 521 gcpro2->next = gcpro1; gcpro2->var = var2; gcpro2->nvars = 1; | |
| 522 gcprolist = gcpro2; | |
| 523 log_gcpro (file, line, gcpro2, gcpro2_type); | |
| 524 } | |
| 525 | |
| 526 void | |
| 527 debug_gcpro3 (char *file, int line, struct gcpro *gcpro1, struct gcpro *gcpro2, | |
| 528 struct gcpro *gcpro3, Lisp_Object *var1, Lisp_Object *var2, | |
| 529 Lisp_Object *var3) | |
| 530 { | |
| 531 gcpro1->next = gcprolist; gcpro1->var = var1; gcpro1->nvars = 1; | |
| 532 gcpro2->next = gcpro1; gcpro2->var = var2; gcpro2->nvars = 1; | |
| 533 gcpro3->next = gcpro2; gcpro3->var = var3; gcpro3->nvars = 1; | |
| 534 gcprolist = gcpro3; | |
| 535 log_gcpro (file, line, gcpro3, gcpro3_type); | |
| 536 } | |
| 537 | |
| 538 void | |
| 539 debug_gcpro4 (char *file, int line, struct gcpro *gcpro1, struct gcpro *gcpro2, | |
| 540 struct gcpro *gcpro3, struct gcpro *gcpro4, Lisp_Object *var1, | |
| 541 Lisp_Object *var2, Lisp_Object *var3, Lisp_Object *var4) | |
| 542 { | |
| 543 log_gcpro (file, line, gcpro4, gcpro4_type); | |
| 544 gcpro1->next = gcprolist; gcpro1->var = var1; gcpro1->nvars = 1; | |
| 545 gcpro2->next = gcpro1; gcpro2->var = var2; gcpro2->nvars = 1; | |
| 546 gcpro3->next = gcpro2; gcpro3->var = var3; gcpro3->nvars = 1; | |
| 547 gcpro4->next = gcpro3; gcpro4->var = var4; gcpro4->nvars = 1; | |
| 548 gcprolist = gcpro4; | |
| 549 } | |
| 550 | |
| 551 void | |
| 552 debug_gcpro5 (char *file, int line, struct gcpro *gcpro1, struct gcpro *gcpro2, | |
| 553 struct gcpro *gcpro3, struct gcpro *gcpro4, struct gcpro *gcpro5, | |
| 554 Lisp_Object *var1, Lisp_Object *var2, Lisp_Object *var3, | |
| 555 Lisp_Object *var4, Lisp_Object *var5) | |
| 556 { | |
| 557 log_gcpro (file, line, gcpro5, gcpro5_type); | |
| 558 gcpro1->next = gcprolist; gcpro1->var = var1; gcpro1->nvars = 1; | |
| 559 gcpro2->next = gcpro1; gcpro2->var = var2; gcpro2->nvars = 1; | |
| 560 gcpro3->next = gcpro2; gcpro3->var = var3; gcpro3->nvars = 1; | |
| 561 gcpro4->next = gcpro3; gcpro4->var = var4; gcpro4->nvars = 1; | |
| 562 gcpro5->next = gcpro4; gcpro5->var = var5; gcpro5->nvars = 1; | |
| 563 gcprolist = gcpro5; | |
| 564 } | |
| 565 | |
| 566 void | |
| 567 debug_ungcpro (char *file, int line, struct gcpro *gcpro1) | |
| 568 { | |
| 569 log_gcpro (file, line, gcpro1, ungcpro_type); | |
| 570 gcprolist = gcpro1->next; | |
| 571 } | |
| 572 | |
| 573 | |
| 574 /* To be called from the debugger */ | |
| 575 void show_gcprohist (void); | |
| 576 void | |
| 577 show_gcprohist (void) | |
| 578 { | |
| 579 int i, j; | |
| 580 for (i = 0, j = gcprohistptr; | |
| 581 i < GCPROHISTLIMIT; | |
| 582 i++, j++) | |
| 583 { | |
| 584 if (j >= GCPROHISTLIMIT) | |
| 585 j = 0; | |
| 586 printf ("%3d %s %d %s 0x%x\n", | |
| 587 j, gcprohist[j].file, gcprohist[j].line, | |
| 588 (gcprohist[j].type == gcpro1_type ? "GCPRO1" : | |
| 589 gcprohist[j].type == gcpro2_type ? "GCPRO2" : | |
| 590 gcprohist[j].type == gcpro3_type ? "GCPRO3" : | |
| 591 gcprohist[j].type == gcpro4_type ? "GCPRO4" : | |
| 446 | 592 gcprohist[j].type == gcpro5_type ? "GCPRO5" : |
| 428 | 593 gcprohist[j].type == ungcpro_type ? "UNGCPRO" : "???"), |
| 594 gcprohist[j].value); | |
| 595 } | |
| 596 fflush (stdout); | |
| 597 } | |
| 598 | |
| 599 #endif /* DEBUG_GCPRO */ |