Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 1 | /* |
| 2 | * memory.c: libxml memory allocator wrapper. |
| 3 | * |
| 4 | * Daniel.Veillard@w3.org |
| 5 | */ |
| 6 | |
Bjorn Reese | 70a9da5 | 2001-04-21 16:57:29 +0000 | [diff] [blame] | 7 | #include "libxml.h" |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 8 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 9 | #include <string.h> |
| 10 | |
| 11 | #ifdef HAVE_SYS_TYPES_H |
| 12 | #include <sys/types.h> |
| 13 | #endif |
| 14 | #ifdef HAVE_TIME_H |
| 15 | #include <time.h> |
| 16 | #endif |
| 17 | #ifdef HAVE_MALLOC_H |
| 18 | #include <malloc.h> |
| 19 | #endif |
| 20 | #ifdef HAVE_STDLIB_H |
| 21 | #include <stdlib.h> |
| 22 | #endif |
| 23 | #ifdef HAVE_CTYPE_H |
| 24 | #include <ctype.h> |
| 25 | #endif |
| 26 | |
| 27 | |
| 28 | #include <libxml/xmlmemory.h> |
| 29 | #include <libxml/xmlerror.h> |
| 30 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 31 | void xmlMallocBreakpoint(void); |
| 32 | void * xmlMemMalloc(int size); |
| 33 | void * xmlMallocLoc(int size, const char * file, int line); |
| 34 | void * xmlMemRealloc(void *ptr,int size); |
| 35 | void xmlMemFree(void *ptr); |
| 36 | char * xmlMemoryStrdup(const char *str); |
| 37 | |
| 38 | /************************************************************************ |
| 39 | * * |
| 40 | * Macros, variables and associated types * |
| 41 | * * |
| 42 | ************************************************************************/ |
| 43 | |
| 44 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 45 | #ifdef xmlMalloc |
| 46 | #undef xmlMalloc |
| 47 | #endif |
| 48 | #ifdef xmlRealloc |
| 49 | #undef xmlRealloc |
| 50 | #endif |
| 51 | #ifdef xmlMemStrdup |
| 52 | #undef xmlMemStrdup |
| 53 | #endif |
| 54 | |
| 55 | |
| 56 | /* |
| 57 | * Each of the blocks allocated begin with a header containing informations |
| 58 | */ |
| 59 | |
| 60 | #define MEMTAG 0x5aa5 |
| 61 | |
| 62 | #define MALLOC_TYPE 1 |
| 63 | #define REALLOC_TYPE 2 |
| 64 | #define STRDUP_TYPE 3 |
| 65 | |
| 66 | typedef struct memnod { |
| 67 | unsigned int mh_tag; |
| 68 | unsigned int mh_type; |
| 69 | unsigned long mh_number; |
| 70 | size_t mh_size; |
| 71 | #ifdef MEM_LIST |
| 72 | struct memnod *mh_next; |
| 73 | struct memnod *mh_prev; |
| 74 | #endif |
| 75 | const char *mh_file; |
| 76 | unsigned int mh_line; |
| 77 | } MEMHDR; |
| 78 | |
| 79 | |
| 80 | #ifdef SUN4 |
| 81 | #define ALIGN_SIZE 16 |
| 82 | #else |
| 83 | #define ALIGN_SIZE sizeof(double) |
| 84 | #endif |
| 85 | #define HDR_SIZE sizeof(MEMHDR) |
| 86 | #define RESERVE_SIZE (((HDR_SIZE + (ALIGN_SIZE-1)) \ |
| 87 | / ALIGN_SIZE ) * ALIGN_SIZE) |
| 88 | |
| 89 | |
| 90 | #define CLIENT_2_HDR(a) ((MEMHDR *) (((char *) (a)) - RESERVE_SIZE)) |
| 91 | #define HDR_2_CLIENT(a) ((void *) (((char *) (a)) + RESERVE_SIZE)) |
| 92 | |
| 93 | |
| 94 | static unsigned long debugMemSize = 0; |
| 95 | static unsigned long debugMaxMemSize = 0; |
| 96 | static int block=0; |
| 97 | int xmlMemStopAtBlock = 0; |
| 98 | int xmlMemInitialized = 0; |
| 99 | #ifdef MEM_LIST |
| 100 | static MEMHDR *memlist = NULL; |
| 101 | #endif |
| 102 | |
| 103 | void debugmem_tag_error(void *addr); |
| 104 | #ifdef MEM_LIST |
| 105 | void debugmem_list_add(MEMHDR *); |
| 106 | void debugmem_list_delete(MEMHDR *); |
| 107 | #endif |
| 108 | #define Mem_Tag_Err(a) debugmem_tag_error(a); |
| 109 | |
| 110 | #ifndef TEST_POINT |
| 111 | #define TEST_POINT |
| 112 | #endif |
| 113 | |
| 114 | /** |
| 115 | * xmlMallocBreakpoint: |
| 116 | * |
| 117 | * Breakpoint to use in conjunction with xmlMemStopAtBlock. When the block |
| 118 | * number reaches the specified value this function is called. One need to add a breakpoint |
| 119 | * to it to get the context in which the given block is allocated. |
| 120 | */ |
| 121 | |
| 122 | void |
| 123 | xmlMallocBreakpoint(void) { |
| 124 | xmlGenericError(xmlGenericErrorContext, |
| 125 | "xmlMallocBreakpoint reached on block %d\n", xmlMemStopAtBlock); |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * xmlMallocLoc: |
| 130 | * @size: an int specifying the size in byte to allocate. |
| 131 | * @file: the file name or NULL |
| 132 | * @line: the line number |
| 133 | * |
| 134 | * a malloc() equivalent, with logging of the allocation info. |
| 135 | * |
| 136 | * Returns a pointer to the allocated area or NULL in case of lack of memory. |
| 137 | */ |
| 138 | |
| 139 | void * |
| 140 | xmlMallocLoc(int size, const char * file, int line) |
| 141 | { |
| 142 | MEMHDR *p; |
| 143 | |
| 144 | if (!xmlMemInitialized) xmlInitMemory(); |
| 145 | #ifdef DEBUG_MEMORY |
| 146 | xmlGenericError(xmlGenericErrorContext, |
| 147 | "Malloc(%d)\n",size); |
| 148 | #endif |
| 149 | |
| 150 | TEST_POINT |
| 151 | |
| 152 | p = (MEMHDR *) malloc(RESERVE_SIZE+size); |
| 153 | |
| 154 | if (!p) { |
| 155 | xmlGenericError(xmlGenericErrorContext, |
| 156 | "xmlMalloc : Out of free space\n"); |
| 157 | xmlMemoryDump(); |
| 158 | return(NULL); |
| 159 | } |
| 160 | p->mh_tag = MEMTAG; |
| 161 | p->mh_number = ++block; |
| 162 | p->mh_size = size; |
| 163 | p->mh_type = MALLOC_TYPE; |
| 164 | p->mh_file = file; |
| 165 | p->mh_line = line; |
| 166 | debugMemSize += size; |
| 167 | if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize; |
| 168 | #ifdef MEM_LIST |
| 169 | debugmem_list_add(p); |
| 170 | #endif |
| 171 | |
| 172 | #ifdef DEBUG_MEMORY |
| 173 | xmlGenericError(xmlGenericErrorContext, |
| 174 | "Malloc(%d) Ok\n",size); |
| 175 | #endif |
| 176 | |
| 177 | if (xmlMemStopAtBlock == block) xmlMallocBreakpoint(); |
| 178 | |
| 179 | TEST_POINT |
| 180 | |
| 181 | return(HDR_2_CLIENT(p)); |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * xmlMemMalloc: |
| 186 | * @size: an int specifying the size in byte to allocate. |
| 187 | * |
| 188 | * a malloc() equivalent, with logging of the allocation info. |
| 189 | * |
| 190 | * Returns a pointer to the allocated area or NULL in case of lack of memory. |
| 191 | */ |
| 192 | |
| 193 | void * |
| 194 | xmlMemMalloc(int size) |
| 195 | { |
| 196 | return(xmlMallocLoc(size, "none", 0)); |
| 197 | } |
| 198 | |
| 199 | /** |
| 200 | * xmlReallocLoc: |
| 201 | * @ptr: the initial memory block pointer |
| 202 | * @size: an int specifying the size in byte to allocate. |
| 203 | * @file: the file name or NULL |
| 204 | * @line: the line number |
| 205 | * |
| 206 | * a realloc() equivalent, with logging of the allocation info. |
| 207 | * |
| 208 | * Returns a pointer to the allocated area or NULL in case of lack of memory. |
| 209 | */ |
| 210 | |
| 211 | void * |
| 212 | xmlReallocLoc(void *ptr,int size, const char * file, int line) |
| 213 | { |
| 214 | MEMHDR *p; |
| 215 | unsigned long number; |
| 216 | |
| 217 | if (!xmlMemInitialized) xmlInitMemory(); |
| 218 | TEST_POINT |
| 219 | |
| 220 | p = CLIENT_2_HDR(ptr); |
| 221 | number = p->mh_number; |
| 222 | if (p->mh_tag != MEMTAG) { |
| 223 | Mem_Tag_Err(p); |
| 224 | goto error; |
| 225 | } |
| 226 | p->mh_tag = ~MEMTAG; |
| 227 | debugMemSize -= p->mh_size; |
| 228 | #ifdef MEM_LIST |
| 229 | debugmem_list_delete(p); |
| 230 | #endif |
| 231 | |
| 232 | p = (MEMHDR *) realloc(p,RESERVE_SIZE+size); |
| 233 | if (!p) { |
| 234 | goto error; |
| 235 | } |
| 236 | p->mh_tag = MEMTAG; |
| 237 | p->mh_number = number; |
| 238 | p->mh_type = REALLOC_TYPE; |
| 239 | p->mh_size = size; |
| 240 | p->mh_file = file; |
| 241 | p->mh_line = line; |
| 242 | debugMemSize += size; |
| 243 | if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize; |
| 244 | #ifdef MEM_LIST |
| 245 | debugmem_list_add(p); |
| 246 | #endif |
| 247 | |
| 248 | TEST_POINT |
| 249 | |
| 250 | return(HDR_2_CLIENT(p)); |
| 251 | |
| 252 | error: |
| 253 | return(NULL); |
| 254 | } |
| 255 | |
| 256 | /** |
| 257 | * xmlMemRealloc: |
| 258 | * @ptr: the initial memory block pointer |
| 259 | * @size: an int specifying the size in byte to allocate. |
| 260 | * |
| 261 | * a realloc() equivalent, with logging of the allocation info. |
| 262 | * |
| 263 | * Returns a pointer to the allocated area or NULL in case of lack of memory. |
| 264 | */ |
| 265 | |
| 266 | void * |
| 267 | xmlMemRealloc(void *ptr,int size) { |
| 268 | return(xmlReallocLoc(ptr, size, "none", 0)); |
| 269 | } |
| 270 | |
| 271 | /** |
| 272 | * xmlMemFree: |
| 273 | * @ptr: the memory block pointer |
| 274 | * |
| 275 | * a free() equivalent, with error checking. |
| 276 | */ |
| 277 | void |
| 278 | xmlMemFree(void *ptr) |
| 279 | { |
| 280 | MEMHDR *p; |
Daniel Veillard | 92ad210 | 2001-03-27 12:47:33 +0000 | [diff] [blame] | 281 | char *target; |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 282 | |
| 283 | TEST_POINT |
| 284 | |
Daniel Veillard | 92ad210 | 2001-03-27 12:47:33 +0000 | [diff] [blame] | 285 | target = (char *) ptr; |
| 286 | |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 287 | p = CLIENT_2_HDR(ptr); |
| 288 | if (p->mh_tag != MEMTAG) { |
| 289 | Mem_Tag_Err(p); |
| 290 | goto error; |
| 291 | } |
| 292 | p->mh_tag = ~MEMTAG; |
| 293 | debugMemSize -= p->mh_size; |
Daniel Veillard | 92ad210 | 2001-03-27 12:47:33 +0000 | [diff] [blame] | 294 | memset(target, -1, p->mh_size); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 295 | |
| 296 | #ifdef MEM_LIST |
| 297 | debugmem_list_delete(p); |
| 298 | #endif |
| 299 | free(p); |
| 300 | |
| 301 | TEST_POINT |
| 302 | |
| 303 | return; |
| 304 | |
| 305 | error: |
| 306 | xmlGenericError(xmlGenericErrorContext, |
| 307 | "xmlFree(%X) error\n", (unsigned int) ptr); |
| 308 | return; |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * xmlMemStrdupLoc: |
| 313 | * @ptr: the initial string pointer |
| 314 | * @file: the file name or NULL |
| 315 | * @line: the line number |
| 316 | * |
| 317 | * a strdup() equivalent, with logging of the allocation info. |
| 318 | * |
| 319 | * Returns a pointer to the new string or NULL if allocation error occured. |
| 320 | */ |
| 321 | |
| 322 | char * |
| 323 | xmlMemStrdupLoc(const char *str, const char *file, int line) |
| 324 | { |
| 325 | char *s; |
| 326 | size_t size = strlen(str) + 1; |
| 327 | MEMHDR *p; |
| 328 | |
| 329 | if (!xmlMemInitialized) xmlInitMemory(); |
| 330 | TEST_POINT |
| 331 | |
| 332 | p = (MEMHDR *) malloc(RESERVE_SIZE+size); |
| 333 | if (!p) { |
| 334 | goto error; |
| 335 | } |
| 336 | p->mh_tag = MEMTAG; |
| 337 | p->mh_number = ++block; |
| 338 | p->mh_size = size; |
| 339 | p->mh_type = STRDUP_TYPE; |
| 340 | p->mh_file = file; |
| 341 | p->mh_line = line; |
| 342 | debugMemSize += size; |
| 343 | if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize; |
| 344 | #ifdef MEM_LIST |
| 345 | debugmem_list_add(p); |
| 346 | #endif |
| 347 | s = (char *) HDR_2_CLIENT(p); |
| 348 | |
| 349 | if (xmlMemStopAtBlock == block) xmlMallocBreakpoint(); |
| 350 | |
| 351 | if (s != NULL) |
| 352 | strcpy(s,str); |
| 353 | else |
| 354 | goto error; |
| 355 | |
| 356 | TEST_POINT |
| 357 | |
| 358 | return(s); |
| 359 | |
| 360 | error: |
| 361 | return(NULL); |
| 362 | } |
| 363 | |
| 364 | /** |
| 365 | * xmlMemoryStrdup: |
| 366 | * @ptr: the initial string pointer |
| 367 | * |
| 368 | * a strdup() equivalent, with logging of the allocation info. |
| 369 | * |
| 370 | * Returns a pointer to the new string or NULL if allocation error occured. |
| 371 | */ |
| 372 | |
| 373 | char * |
| 374 | xmlMemoryStrdup(const char *str) { |
| 375 | return(xmlMemStrdupLoc(str, "none", 0)); |
| 376 | } |
| 377 | |
| 378 | /** |
| 379 | * xmlMemUsed: |
| 380 | * |
| 381 | * returns the amount of memory currenly allocated |
| 382 | * |
| 383 | * Returns an int representing the amount of memory allocated. |
| 384 | */ |
| 385 | |
| 386 | int |
| 387 | xmlMemUsed(void) { |
| 388 | return(debugMemSize); |
| 389 | } |
| 390 | |
| 391 | #ifdef MEM_LIST |
| 392 | /** |
| 393 | * xmlMemContentShow: |
| 394 | * @fp: a FILE descriptor used as the output file |
| 395 | * @p: a memory block header |
| 396 | * |
| 397 | * tries to show some content from the memory block |
| 398 | */ |
| 399 | |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 400 | static void |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 401 | xmlMemContentShow(FILE *fp, MEMHDR *p) |
| 402 | { |
| 403 | int i,j,len = p->mh_size; |
| 404 | const char *buf = (const char *) HDR_2_CLIENT(p); |
| 405 | |
| 406 | if (p == NULL) { |
| 407 | fprintf(fp, " NULL"); |
| 408 | return; |
| 409 | } |
| 410 | |
| 411 | for (i = 0;i < len;i++) { |
| 412 | if (buf[i] == 0) break; |
| 413 | if (!isprint(buf[i])) break; |
| 414 | } |
| 415 | if ((i < 4) && ((buf[i] != 0) || (i == 0))) { |
| 416 | if (len >= 4) { |
| 417 | MEMHDR *q; |
| 418 | void *cur; |
| 419 | |
| 420 | for (j = 0;j < len -3;j += 4) { |
| 421 | cur = *((void **) &buf[j]); |
| 422 | q = CLIENT_2_HDR(cur); |
| 423 | p = memlist; |
| 424 | while (p != NULL) { |
| 425 | if (p == q) break; |
| 426 | p = p->mh_next; |
| 427 | } |
| 428 | if ((p != NULL) && (p == q)) { |
| 429 | fprintf(fp, " pointer to #%lu at index %d", |
| 430 | p->mh_number, j); |
| 431 | return; |
| 432 | } |
| 433 | } |
| 434 | } |
| 435 | } else if ((i == 0) && (buf[i] == 0)) { |
| 436 | fprintf(fp," null"); |
| 437 | } else { |
| 438 | if (buf[i] == 0) fprintf(fp," \"%.25s\"", buf); |
| 439 | else { |
| 440 | fprintf(fp," ["); |
| 441 | for (j = 0;j < i;j++) |
| 442 | fprintf(fp,"%c", buf[j]); |
| 443 | fprintf(fp,"]"); |
| 444 | } |
| 445 | } |
| 446 | } |
| 447 | #endif |
| 448 | |
| 449 | /** |
| 450 | * xmlMemShow: |
| 451 | * @fp: a FILE descriptor used as the output file |
| 452 | * @nr: number of entries to dump |
| 453 | * |
| 454 | * show a show display of the memory allocated, and dump |
| 455 | * the @nr last allocated areas which were not freed |
| 456 | */ |
| 457 | |
| 458 | void |
| 459 | xmlMemShow(FILE *fp, int nr) |
| 460 | { |
| 461 | #ifdef MEM_LIST |
| 462 | MEMHDR *p; |
| 463 | #endif |
| 464 | |
| 465 | if (fp != NULL) |
| 466 | fprintf(fp," MEMORY ALLOCATED : %lu, MAX was %lu\n", |
| 467 | debugMemSize, debugMaxMemSize); |
| 468 | #ifdef MEM_LIST |
| 469 | if (nr > 0) { |
| 470 | fprintf(fp,"NUMBER SIZE TYPE WHERE\n"); |
| 471 | p = memlist; |
| 472 | while ((p) && nr > 0) { |
| 473 | fprintf(fp,"%6lu %6u ",p->mh_number,p->mh_size); |
| 474 | switch (p->mh_type) { |
| 475 | case STRDUP_TYPE:fprintf(fp,"strdup() in ");break; |
| 476 | case MALLOC_TYPE:fprintf(fp,"malloc() in ");break; |
| 477 | case REALLOC_TYPE:fprintf(fp,"realloc() in ");break; |
| 478 | default:fprintf(fp," ??? in ");break; |
| 479 | } |
| 480 | if (p->mh_file != NULL) |
| 481 | fprintf(fp,"%s(%d)", p->mh_file, p->mh_line); |
| 482 | if (p->mh_tag != MEMTAG) |
| 483 | fprintf(fp," INVALID"); |
| 484 | xmlMemContentShow(fp, p); |
| 485 | fprintf(fp,"\n"); |
| 486 | nr--; |
| 487 | p = p->mh_next; |
| 488 | } |
| 489 | } |
| 490 | #endif /* MEM_LIST */ |
| 491 | } |
| 492 | |
| 493 | /** |
| 494 | * xmlMemDisplay: |
| 495 | * @fp: a FILE descriptor used as the output file, if NULL, the result is |
| 496 | * written to the file .memorylist |
| 497 | * |
| 498 | * show in-extenso the memory blocks allocated |
| 499 | */ |
| 500 | |
| 501 | void |
| 502 | xmlMemDisplay(FILE *fp) |
| 503 | { |
| 504 | #ifdef MEM_LIST |
| 505 | MEMHDR *p; |
| 506 | int idx; |
| 507 | #if defined(HAVE_LOCALTIME) && defined(HAVE_STRFTIME) |
| 508 | time_t currentTime; |
| 509 | char buf[500]; |
| 510 | struct tm * tstruct; |
| 511 | |
| 512 | currentTime = time(NULL); |
| 513 | tstruct = localtime(¤tTime); |
Daniel Veillard | 56a4cb8 | 2001-03-24 17:00:36 +0000 | [diff] [blame] | 514 | strftime(buf, sizeof(buf) - 1, "%I:%M:%S %p", tstruct); |
Owen Taylor | 3473f88 | 2001-02-23 17:55:21 +0000 | [diff] [blame] | 515 | fprintf(fp," %s\n\n", buf); |
| 516 | #endif |
| 517 | |
| 518 | |
| 519 | fprintf(fp," MEMORY ALLOCATED : %lu, MAX was %lu\n", |
| 520 | debugMemSize, debugMaxMemSize); |
| 521 | fprintf(fp,"BLOCK NUMBER SIZE TYPE\n"); |
| 522 | idx = 0; |
| 523 | p = memlist; |
| 524 | while (p) { |
| 525 | fprintf(fp,"%-5u %6lu %6u ",idx++,p->mh_number,p->mh_size); |
| 526 | switch (p->mh_type) { |
| 527 | case STRDUP_TYPE:fprintf(fp,"strdup() in ");break; |
| 528 | case MALLOC_TYPE:fprintf(fp,"malloc() in ");break; |
| 529 | case REALLOC_TYPE:fprintf(fp,"realloc() in ");break; |
| 530 | default:fprintf(fp," ??? in ");break; |
| 531 | } |
| 532 | if (p->mh_file != NULL) fprintf(fp,"%s(%d)", p->mh_file, p->mh_line); |
| 533 | if (p->mh_tag != MEMTAG) |
| 534 | fprintf(fp," INVALID"); |
| 535 | xmlMemContentShow(fp, p); |
| 536 | fprintf(fp,"\n"); |
| 537 | p = p->mh_next; |
| 538 | } |
| 539 | #else |
| 540 | fprintf(fp,"Memory list not compiled (MEM_LIST not defined !)\n"); |
| 541 | #endif |
| 542 | } |
| 543 | |
| 544 | #ifdef MEM_LIST |
| 545 | |
| 546 | void debugmem_list_add(MEMHDR *p) |
| 547 | { |
| 548 | p->mh_next = memlist; |
| 549 | p->mh_prev = NULL; |
| 550 | if (memlist) memlist->mh_prev = p; |
| 551 | memlist = p; |
| 552 | #ifdef MEM_LIST_DEBUG |
| 553 | if (stderr) |
| 554 | Mem_Display(stderr); |
| 555 | #endif |
| 556 | } |
| 557 | |
| 558 | void debugmem_list_delete(MEMHDR *p) |
| 559 | { |
| 560 | if (p->mh_next) |
| 561 | p->mh_next->mh_prev = p->mh_prev; |
| 562 | if (p->mh_prev) |
| 563 | p->mh_prev->mh_next = p->mh_next; |
| 564 | else memlist = p->mh_next; |
| 565 | #ifdef MEM_LIST_DEBUG |
| 566 | if (stderr) |
| 567 | Mem_Display(stderr); |
| 568 | #endif |
| 569 | } |
| 570 | |
| 571 | #endif |
| 572 | |
| 573 | /* |
| 574 | * debugmem_tag_error : internal error function. |
| 575 | */ |
| 576 | |
| 577 | void debugmem_tag_error(void *p) |
| 578 | { |
| 579 | xmlGenericError(xmlGenericErrorContext, |
| 580 | "Memory tag error occurs :%p \n\t bye\n", p); |
| 581 | #ifdef MEM_LIST |
| 582 | if (stderr) |
| 583 | xmlMemDisplay(stderr); |
| 584 | #endif |
| 585 | } |
| 586 | |
| 587 | FILE *xmlMemoryDumpFile = NULL; |
| 588 | |
| 589 | |
| 590 | /** |
| 591 | * xmlMemoryDump: |
| 592 | * |
| 593 | * Dump in-extenso the memory blocks allocated to the file .memorylist |
| 594 | */ |
| 595 | |
| 596 | void |
| 597 | xmlMemoryDump(void) |
| 598 | { |
| 599 | #if defined(DEBUG_MEMORY_LOCATION) | defined(DEBUG_MEMORY) |
| 600 | FILE *dump; |
| 601 | |
| 602 | dump = fopen(".memdump", "w"); |
| 603 | if (dump == NULL) xmlMemoryDumpFile = stdout; |
| 604 | else xmlMemoryDumpFile = dump; |
| 605 | |
| 606 | xmlMemDisplay(xmlMemoryDumpFile); |
| 607 | |
| 608 | if (dump != NULL) fclose(dump); |
| 609 | #endif |
| 610 | } |
| 611 | |
| 612 | |
| 613 | /**************************************************************** |
| 614 | * * |
| 615 | * Initialization Routines * |
| 616 | * * |
| 617 | ****************************************************************/ |
| 618 | |
| 619 | #if defined(DEBUG_MEMORY_LOCATION) | defined(DEBUG_MEMORY) |
| 620 | xmlFreeFunc xmlFree = (xmlFreeFunc) xmlMemFree; |
| 621 | xmlMallocFunc xmlMalloc = (xmlMallocFunc) xmlMemMalloc; |
| 622 | xmlReallocFunc xmlRealloc = (xmlReallocFunc) xmlMemRealloc; |
| 623 | xmlStrdupFunc xmlMemStrdup = (xmlStrdupFunc) xmlMemoryStrdup; |
| 624 | #else |
| 625 | xmlFreeFunc xmlFree = (xmlFreeFunc) free; |
| 626 | xmlMallocFunc xmlMalloc = (xmlMallocFunc) malloc; |
| 627 | xmlReallocFunc xmlRealloc = (xmlReallocFunc) realloc; |
| 628 | xmlStrdupFunc xmlMemStrdup = (xmlStrdupFunc) strdup; |
| 629 | #endif |
| 630 | |
| 631 | /** |
| 632 | * xmlInitMemory: |
| 633 | * |
| 634 | * Initialize the memory layer. |
| 635 | * |
| 636 | * Returns 0 on success |
| 637 | */ |
| 638 | |
| 639 | static int xmlInitMemoryDone = 0; |
| 640 | |
| 641 | int |
| 642 | xmlInitMemory(void) |
| 643 | { |
| 644 | int ret; |
| 645 | |
| 646 | #ifdef HAVE_STDLIB_H |
| 647 | char *breakpoint; |
| 648 | #endif |
| 649 | |
| 650 | if (xmlInitMemoryDone) return(-1); |
| 651 | |
| 652 | #ifdef HAVE_STDLIB_H |
| 653 | breakpoint = getenv("XML_MEM_BREAKPOINT"); |
| 654 | if (breakpoint != NULL) { |
| 655 | sscanf(breakpoint, "%d", &xmlMemStopAtBlock); |
| 656 | } |
| 657 | #endif |
| 658 | |
| 659 | #ifdef DEBUG_MEMORY |
| 660 | xmlGenericError(xmlGenericErrorContext, |
| 661 | "xmlInitMemory() Ok\n"); |
| 662 | #endif |
| 663 | ret = 0; |
| 664 | return(ret); |
| 665 | } |
| 666 | |
| 667 | /** |
| 668 | * xmlMemSetup: |
| 669 | * @freeFunc: the free() function to use |
| 670 | * @mallocFunc: the malloc() function to use |
| 671 | * @reallocFunc: the realloc() function to use |
| 672 | * @strdupFunc: the strdup() function to use |
| 673 | * |
| 674 | * Override the default memory access functions with a new set |
| 675 | * This has to be called before any other libxml routines ! |
| 676 | * |
| 677 | * Should this be blocked if there was already some allocations |
| 678 | * done ? |
| 679 | * |
| 680 | * Returns 0 on success |
| 681 | */ |
| 682 | int |
| 683 | xmlMemSetup(xmlFreeFunc freeFunc, xmlMallocFunc mallocFunc, |
| 684 | xmlReallocFunc reallocFunc, xmlStrdupFunc strdupFunc) { |
| 685 | if (freeFunc == NULL) |
| 686 | return(-1); |
| 687 | if (mallocFunc == NULL) |
| 688 | return(-1); |
| 689 | if (reallocFunc == NULL) |
| 690 | return(-1); |
| 691 | if (strdupFunc == NULL) |
| 692 | return(-1); |
| 693 | xmlFree = freeFunc; |
| 694 | xmlMalloc = mallocFunc; |
| 695 | xmlRealloc = reallocFunc; |
| 696 | xmlMemStrdup = strdupFunc; |
| 697 | return(0); |
| 698 | } |
| 699 | |
| 700 | /** |
| 701 | * xmlMemGet: |
| 702 | * @freeFunc: the free() function in use |
| 703 | * @mallocFunc: the malloc() function in use |
| 704 | * @reallocFunc: the realloc() function in use |
| 705 | * @strdupFunc: the strdup() function in use |
| 706 | * |
| 707 | * Return the memory access functions set currently in use |
| 708 | * |
| 709 | * Returns 0 on success |
| 710 | */ |
| 711 | int |
| 712 | xmlMemGet(xmlFreeFunc *freeFunc, xmlMallocFunc *mallocFunc, |
| 713 | xmlReallocFunc *reallocFunc, xmlStrdupFunc *strdupFunc) { |
| 714 | if (freeFunc != NULL) *freeFunc = xmlFree; |
| 715 | if (mallocFunc != NULL) *mallocFunc = xmlMalloc; |
| 716 | if (reallocFunc != NULL) *reallocFunc = xmlRealloc; |
| 717 | if (strdupFunc != NULL) *strdupFunc = xmlMemStrdup; |
| 718 | return(0); |
| 719 | } |
| 720 | |