1 /* mc_diff - Memory snapshooting and comparison */
3 /* Copyright (c) 2008-2014. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "xbt/ex_interface.h" /* internals of backtrace setup */
12 #include "xbt/mmalloc.h"
13 #include "mc/datatypes.h"
14 #include "mc/mc_private.h"
16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_diff, xbt,
17 "Logging specific to mc_diff in mc");
19 xbt_dynar_t mc_heap_comparison_ignore;
20 xbt_dynar_t stacks_areas;
21 void *maestro_stack_start, *maestro_stack_end;
24 /********************************* Backtrace ***********************************/
25 /******************************************************************************/
27 static void mmalloc_backtrace_block_display(void *heapinfo, int block)
32 /* if (((malloc_info *)heapinfo)[block].busy_block.bt_size == 0) { */
33 /* fprintf(stderr, "No backtrace available for that block, sorry.\n"); */
37 /* memcpy(&e.bt,&(((malloc_info *)heapinfo)[block].busy_block.bt),sizeof(void*)*XBT_BACKTRACE_SIZE); */
38 /* e.used = ((malloc_info *)heapinfo)[block].busy_block.bt_size; */
40 /* xbt_ex_setup_backtrace(&e); */
41 /* if (e.used == 0) { */
42 /* fprintf(stderr, "(backtrace not set)\n"); */
43 /* } else if (e.bt_strings == NULL) { */
44 /* fprintf(stderr, "(backtrace not ready to be computed. %s)\n",xbt_binary_name?"Dunno why":"xbt_binary_name not setup yet"); */
48 /* fprintf(stderr, "Backtrace of where the block %d was malloced (%d frames):\n", block ,e.used); */
49 /* for (i = 0; i < e.used; i++) /\* no need to display "xbt_backtrace_display" *\/{ */
50 /* fprintf(stderr, "%d ---> %s\n",i, e.bt_strings[i] + 4); */
55 static void mmalloc_backtrace_fragment_display(void *heapinfo, int block,
61 /* memcpy(&e.bt,&(((malloc_info *)heapinfo)[block].busy_frag.bt[frag]),sizeof(void*)*XBT_BACKTRACE_SIZE); */
62 /* e.used = XBT_BACKTRACE_SIZE; */
64 /* xbt_ex_setup_backtrace(&e); */
65 /* if (e.used == 0) { */
66 /* fprintf(stderr, "(backtrace not set)\n"); */
67 /* } else if (e.bt_strings == NULL) { */
68 /* fprintf(stderr, "(backtrace not ready to be computed. %s)\n",xbt_binary_name?"Dunno why":"xbt_binary_name not setup yet"); */
72 /* fprintf(stderr, "Backtrace of where the fragment %d in block %d was malloced (%d frames):\n", frag, block ,e.used); */
73 /* for (i = 0; i < e.used; i++) /\* no need to display "xbt_backtrace_display" *\/{ */
74 /* fprintf(stderr, "%d ---> %s\n",i, e.bt_strings[i] + 4); */
80 static void mmalloc_backtrace_display(void *addr)
83 /* size_t block, frag_nb; */
86 /* xbt_mheap_t heap = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit(); */
88 /* block = (((char*) (addr) - (char*) heap -> heapbase) / BLOCKSIZE + 1); */
90 /* type = heap->heapinfo[block].type; */
93 /* case -1 : /\* Free block *\/ */
94 /* fprintf(stderr, "Asked to display the backtrace of a block that is free. I'm puzzled\n"); */
97 /* case 0: /\* Large block *\/ */
98 /* mmalloc_backtrace_block_display(heap->heapinfo, block); */
100 /* default: /\* Fragmented block *\/ */
101 /* frag_nb = RESIDUAL(addr, BLOCKSIZE) >> type; */
102 /* if(heap->heapinfo[block].busy_frag.frag_size[frag_nb] == -1){ */
103 /* fprintf(stderr , "Asked to display the backtrace of a fragment that is free. I'm puzzled\n"); */
106 /* mmalloc_backtrace_fragment_display(heap->heapinfo, block, frag_nb); */
112 static int compare_backtrace(int b1, int f1, int b2, int f2)
116 for(i=0; i< XBT_BACKTRACE_SIZE; i++){
117 if(heapinfo1[b1].busy_frag.bt[f1][i] != heapinfo2[b2].busy_frag.bt[f2][i]){
118 //mmalloc_backtrace_fragment_display((void*)heapinfo1, b1, f1);
119 //mmalloc_backtrace_fragment_display((void*)heapinfo2, b2, f2);
124 for(i=0; i< heapinfo1[b1].busy_block.bt_size; i++){
125 if(heapinfo1[b1].busy_block.bt[i] != heapinfo2[b2].busy_block.bt[i]){
126 //mmalloc_backtrace_block_display((void*)heapinfo1, b1);
127 //mmalloc_backtrace_block_display((void*)heapinfo2, b2);
136 /*********************************** Heap comparison ***********************************/
137 /***************************************************************************************/
139 typedef char *type_name;
142 /** \brief Base address of the real heap */
145 // Number of blocks in the heaps:
146 size_t heapsize1, heapsize2;
147 xbt_dynar_t to_ignore1, to_ignore2;
148 s_heap_area_t *equals_to1, *equals_to2;
149 dw_type_t *types1, *types2;
153 #define equals_to1_(i,j) equals_to1[ MAX_FRAGMENT_PER_BLOCK*(i) + (j)]
154 #define equals_to2_(i,j) equals_to2[ MAX_FRAGMENT_PER_BLOCK*(i) + (j)]
155 #define types1_(i,j) types1[ MAX_FRAGMENT_PER_BLOCK*(i) + (j)]
156 #define types2_(i,j) types2[ MAX_FRAGMENT_PER_BLOCK*(i) + (j)]
158 __thread struct s_mc_diff *mc_diff_info = NULL;
160 /*********************************** Free functions ************************************/
162 static void heap_area_pair_free(heap_area_pair_t pair)
168 static void heap_area_pair_free_voidp(void *d)
170 heap_area_pair_free((heap_area_pair_t) * (void **) d);
173 static void heap_area_free(heap_area_t area)
179 /************************************************************************************/
181 static s_heap_area_t make_heap_area(int block, int fragment)
186 area.fragment = fragment;
191 static int is_new_heap_area_pair(xbt_dynar_t list, int block1, int fragment1,
192 int block2, int fragment2)
195 unsigned int cursor = 0;
196 heap_area_pair_t current_pair;
198 xbt_dynar_foreach(list, cursor, current_pair) {
199 if (current_pair->block1 == block1 && current_pair->block2 == block2
200 && current_pair->fragment1 == fragment1
201 && current_pair->fragment2 == fragment2)
208 static int add_heap_area_pair(xbt_dynar_t list, int block1, int fragment1,
209 int block2, int fragment2)
212 if (is_new_heap_area_pair(list, block1, fragment1, block2, fragment2)) {
213 heap_area_pair_t pair = NULL;
214 pair = xbt_new0(s_heap_area_pair_t, 1);
215 pair->block1 = block1;
216 pair->fragment1 = fragment1;
217 pair->block2 = block2;
218 pair->fragment2 = fragment2;
220 xbt_dynar_push(list, &pair);
228 static ssize_t heap_comparison_ignore_size(xbt_dynar_t ignore_list,
232 unsigned int cursor = 0;
234 int end = xbt_dynar_length(ignore_list) - 1;
235 mc_heap_ignore_region_t region;
237 while (start <= end) {
238 cursor = (start + end) / 2;
240 (mc_heap_ignore_region_t) xbt_dynar_get_as(ignore_list, cursor,
241 mc_heap_ignore_region_t);
242 if (region->address == address)
244 if (region->address < address)
246 if (region->address > address)
253 static int is_stack(void *address)
255 unsigned int cursor = 0;
256 stack_region_t stack;
258 xbt_dynar_foreach(stacks_areas, cursor, stack) {
259 if (address == stack->address)
266 // TODO, this should depend on the snapshot?
267 static int is_block_stack(int block)
269 unsigned int cursor = 0;
270 stack_region_t stack;
272 xbt_dynar_foreach(stacks_areas, cursor, stack) {
273 if (block == stack->block)
280 static void match_equals(struct s_mc_diff *state, xbt_dynar_t list)
283 unsigned int cursor = 0;
284 heap_area_pair_t current_pair;
286 xbt_dynar_foreach(list, cursor, current_pair) {
288 if (current_pair->fragment1 != -1) {
290 state->equals_to1_(current_pair->block1, current_pair->fragment1) =
291 make_heap_area(current_pair->block2, current_pair->fragment2);
292 state->equals_to2_(current_pair->block2, current_pair->fragment2) =
293 make_heap_area(current_pair->block1, current_pair->fragment1);
297 state->equals_to1_(current_pair->block1, 0) =
298 make_heap_area(current_pair->block2, current_pair->fragment2);
299 state->equals_to2_(current_pair->block2, 0) =
300 make_heap_area(current_pair->block1, current_pair->fragment1);
307 /** Check whether two blocks are known to be matching
309 * @param state State used
310 * @param b1 Block of state 1
311 * @param b2 Block of state 2
312 * @return if the blocks are known to be matching
314 static int equal_blocks(struct s_mc_diff *state, int b1, int b2)
317 if (state->equals_to1_(b1, 0).block == b2
318 && state->equals_to2_(b2, 0).block == b1)
324 /** Check whether two fragments are known to be matching
326 * @param state State used
327 * @param b1 Block of state 1
328 * @param f1 Fragment of state 1
329 * @param b2 Block of state 2
330 * @param f2 Fragment of state 2
331 * @return if the fragments are known to be matching
333 static int equal_fragments(struct s_mc_diff *state, int b1, int f1, int b2,
337 if (state->equals_to1_(b1, f1).block == b2
338 && state->equals_to1_(b1, f1).fragment == f2
339 && state->equals_to2_(b2, f2).block == b1
340 && state->equals_to2_(b2, f2).fragment == f1)
346 int init_heap_information(xbt_mheap_t heap1, xbt_mheap_t heap2, xbt_dynar_t i1,
349 if (mc_diff_info == NULL) {
350 mc_diff_info = xbt_new0(struct s_mc_diff, 1);
351 mc_diff_info->equals_to1 = NULL;
352 mc_diff_info->equals_to2 = NULL;
353 mc_diff_info->types1 = NULL;
354 mc_diff_info->types2 = NULL;
356 struct s_mc_diff *state = mc_diff_info;
358 if ((((struct mdesc *) heap1)->heaplimit !=
359 ((struct mdesc *) heap2)->heaplimit)
361 ((((struct mdesc *) heap1)->heapsize !=
362 ((struct mdesc *) heap2)->heapsize)))
365 state->heaplimit = ((struct mdesc *) heap1)->heaplimit;
367 // Mamailloute in order to find the base address of the main heap:
369 (char *) mmalloc_get_current_heap() - STD_HEAP_SIZE - xbt_pagesize;
371 state->heapsize1 = heap1->heapsize;
372 state->heapsize2 = heap2->heapsize;
374 state->to_ignore1 = i1;
375 state->to_ignore2 = i2;
377 if (state->heaplimit > state->available) {
379 realloc(state->equals_to1,
380 state->heaplimit * MAX_FRAGMENT_PER_BLOCK *
381 sizeof(s_heap_area_t));
383 realloc(state->types1,
384 state->heaplimit * MAX_FRAGMENT_PER_BLOCK *
385 sizeof(type_name *));
387 realloc(state->equals_to2,
388 state->heaplimit * MAX_FRAGMENT_PER_BLOCK *
389 sizeof(s_heap_area_t));
391 realloc(state->types2,
392 state->heaplimit * MAX_FRAGMENT_PER_BLOCK *
393 sizeof(type_name *));
394 state->available = state->heaplimit;
397 memset(state->equals_to1, 0,
398 state->heaplimit * MAX_FRAGMENT_PER_BLOCK * sizeof(s_heap_area_t));
399 memset(state->equals_to2, 0,
400 state->heaplimit * MAX_FRAGMENT_PER_BLOCK * sizeof(s_heap_area_t));
401 memset(state->types1, 0,
402 state->heaplimit * MAX_FRAGMENT_PER_BLOCK * sizeof(type_name *));
403 memset(state->types2, 0,
404 state->heaplimit * MAX_FRAGMENT_PER_BLOCK * sizeof(type_name *));
410 void reset_heap_information()
415 int mmalloc_compare_heap(mc_snapshot_t snapshot1, mc_snapshot_t snapshot2)
418 struct s_mc_diff *state = mc_diff_info;
420 /* Start comparison */
421 size_t i1, i2, j1, j2, k;
422 void *addr_block1, *addr_block2, *addr_frag1, *addr_frag2;
423 int nb_diff1 = 0, nb_diff2 = 0;
425 xbt_dynar_t previous =
426 xbt_dynar_new(sizeof(heap_area_pair_t), heap_area_pair_free_voidp);
428 int equal, res_compare = 0;
430 /* Check busy blocks */
434 malloc_info heapinfo_temp1, heapinfo_temp2;
435 malloc_info heapinfo_temp2b;
437 mc_mem_region_t heap_region1 = snapshot1->regions[0];
438 mc_mem_region_t heap_region2 = snapshot2->regions[0];
440 // This is in snapshot do not use them directly:
441 malloc_info* heapinfos1 = mc_snapshot_read_pointer(&((xbt_mheap_t)std_heap)->heapinfo, snapshot1);
442 malloc_info* heapinfos2 = mc_snapshot_read_pointer(&((xbt_mheap_t)std_heap)->heapinfo, snapshot2);
444 while (i1 <= state->heaplimit) {
446 // TODO, lookup in the correct region in order to speed it up:
447 malloc_info* heapinfo1 = mc_snapshot_read_region(&heapinfos1[i1], heap_region1, &heapinfo_temp1, sizeof(malloc_info));
448 malloc_info* heapinfo2 = mc_snapshot_read_region(&heapinfos2[i1], heap_region2, &heapinfo_temp2, sizeof(malloc_info));
450 if (heapinfo1->type == -1) { /* Free block */
456 ((void *) (((ADDR2UINT(i1)) - 1) * BLOCKSIZE +
457 (char *) ((xbt_mheap_t) state->s_heap)->heapbase));
459 if (heapinfo1->type == 0) { /* Large block */
461 if (is_stack(addr_block1)) {
462 for (k = 0; k < heapinfo1->busy_block.size; k++)
463 state->equals_to1_(i1 + k, 0) = make_heap_area(i1, -1);
464 for (k = 0; k < heapinfo2->busy_block.size; k++)
465 state->equals_to2_(i1 + k, 0) = make_heap_area(i1, -1);
466 i1 += heapinfo1->busy_block.size;
470 if (state->equals_to1_(i1, 0).valid) {
479 /* Try first to associate to same block in the other heap */
480 if (heapinfo2->type == heapinfo1->type) {
482 if (state->equals_to2_(i1, 0).valid == 0) {
485 ((void *) (((ADDR2UINT(i1)) - 1) * BLOCKSIZE +
486 (char *) ((xbt_mheap_t) state->s_heap)->heapbase));
489 compare_heap_area(addr_block1, addr_block2, snapshot1, snapshot2,
492 if (res_compare != 1) {
493 for (k = 1; k < heapinfo2->busy_block.size; k++)
494 state->equals_to2_(i1 + k, 0) = make_heap_area(i1, -1);
495 for (k = 1; k < heapinfo1->busy_block.size; k++)
496 state->equals_to1_(i1 + k, 0) = make_heap_area(i1, -1);
498 i1 += heapinfo1->busy_block.size;
501 xbt_dynar_reset(previous);
507 while (i2 <= state->heaplimit && !equal) {
510 ((void *) (((ADDR2UINT(i2)) - 1) * BLOCKSIZE +
511 (char *) ((xbt_mheap_t) state->s_heap)->heapbase));
518 malloc_info* heapinfo2b = mc_snapshot_read_region(&heapinfos2[i2], heap_region2, &heapinfo_temp2b, sizeof(malloc_info));
520 if (heapinfo2b->type != 0) {
525 if (state->equals_to2_(i2, 0).valid) {
531 compare_heap_area(addr_block1, addr_block2, snapshot1, snapshot2,
534 if (res_compare != 1) {
535 for (k = 1; k < heapinfo2b->busy_block.size; k++)
536 state->equals_to2_(i2 + k, 0) = make_heap_area(i1, -1);
537 for (k = 1; k < heapinfo1->busy_block.size; k++)
538 state->equals_to1_(i1 + k, 0) = make_heap_area(i2, -1);
540 i1 += heapinfo1->busy_block.size;
543 xbt_dynar_reset(previous);
550 XBT_DEBUG("Block %zu not found (size_used = %zu, addr = %p)", i1,
551 heapinfo1->busy_block.busy_size, addr_block1);
552 i1 = state->heaplimit + 1;
557 } else { /* Fragmented block */
559 for (j1 = 0; j1 < (size_t) (BLOCKSIZE >> heapinfo1->type); j1++) {
561 if (heapinfo1->busy_frag.frag_size[j1] == -1) /* Free fragment */
564 if (state->equals_to1_(i1, j1).valid)
568 (void *) ((char *) addr_block1 + (j1 << heapinfo1->type));
573 /* Try first to associate to same fragment in the other heap */
574 if (heapinfo2->type == heapinfo1->type) {
576 if (state->equals_to2_(i1, j1).valid == 0) {
579 ((void *) (((ADDR2UINT(i1)) - 1) * BLOCKSIZE +
580 (char *) ((xbt_mheap_t) state->s_heap)->heapbase));
582 (void *) ((char *) addr_block2 +
583 (j1 << heapinfo2->type));
586 compare_heap_area(addr_frag1, addr_frag2, snapshot1, snapshot2,
589 if (res_compare != 1)
592 xbt_dynar_reset(previous);
598 while (i2 <= state->heaplimit && !equal) {
600 malloc_info* heapinfo2b = mc_snapshot_read_region(&heapinfos2[i2], heap_region2, &heapinfo_temp2b, sizeof(malloc_info));
601 if (heapinfo2b->type <= 0) {
606 for (j2 = 0; j2 < (size_t) (BLOCKSIZE >> heapinfo2b->type);
609 if (i2 == i1 && j2 == j1)
612 if (state->equals_to2_(i2, j2).valid)
616 ((void *) (((ADDR2UINT(i2)) - 1) * BLOCKSIZE +
617 (char *) ((xbt_mheap_t) state->s_heap)->heapbase));
619 (void *) ((char *) addr_block2 +
620 (j2 << heapinfo2b->type));
623 compare_heap_area(addr_frag1, addr_frag2, snapshot2, snapshot2,
626 if (res_compare != 1) {
628 xbt_dynar_reset(previous);
632 xbt_dynar_reset(previous);
642 ("Block %zu, fragment %zu not found (size_used = %zd, address = %p)\n",
643 i1, j1, heapinfo1->busy_frag.frag_size[j1],
645 i2 = state->heaplimit + 1;
646 i1 = state->heaplimit + 1;
659 /* All blocks/fragments are equal to another block/fragment ? */
662 for(i = 1; i <= state->heaplimit; i++) {
663 malloc_info* heapinfo1 = mc_snapshot_read_region(&heapinfos1[i], heap_region1, &heapinfo_temp1, sizeof(malloc_info));
664 if (heapinfo1->type == 0) {
665 if (i1 == state->heaplimit) {
666 if (heapinfo1->busy_block.busy_size > 0) {
667 if (state->equals_to1_(i, 0).valid == 0) {
668 if (XBT_LOG_ISENABLED(mc_diff, xbt_log_priority_debug)) {
670 XBT_DEBUG("Block %zu not found (size used = %zu)", i,
671 heapinfo1->busy_block.busy_size);
672 //mmalloc_backtrace_block_display((void*)heapinfo1, i);
679 if (heapinfo1->type > 0) {
680 for (j = 0; j < (size_t) (BLOCKSIZE >> heapinfo1->type); j++) {
681 if (i1 == state->heaplimit) {
682 if (heapinfo1->busy_frag.frag_size[j] > 0) {
683 if (state->equals_to1_(i, j).valid == 0) {
684 if (XBT_LOG_ISENABLED(mc_diff, xbt_log_priority_debug)) {
685 // TODO, print fragment address
687 ("Block %zu, Fragment %zu not found (size used = %zd)",
689 heapinfo1->busy_frag.frag_size[j]);
690 //mmalloc_backtrace_fragment_display((void*)heapinfo1, i, j);
700 if (i1 == state->heaplimit)
701 XBT_DEBUG("Number of blocks/fragments not found in heap1 : %d", nb_diff1);
703 for (i=1; i <= state->heaplimit; i++) {
704 malloc_info* heapinfo2 = mc_snapshot_read_region(&heapinfos2[i], heap_region2, &heapinfo_temp2, sizeof(malloc_info));
705 if (heapinfo2->type == 0) {
706 if (i1 == state->heaplimit) {
707 if (heapinfo2->busy_block.busy_size > 0) {
708 if (state->equals_to2_(i, 0).valid == 0) {
709 if (XBT_LOG_ISENABLED(mc_diff, xbt_log_priority_debug)) {
710 // TODO, print address of the block
711 XBT_DEBUG("Block %zu not found (size used = %zu)", i,
712 heapinfo2->busy_block.busy_size);
713 //mmalloc_backtrace_block_display((void*)heapinfo2, i);
720 if (heapinfo2->type > 0) {
721 for (j = 0; j < (size_t) (BLOCKSIZE >> heapinfo2->type); j++) {
722 if (i1 == state->heaplimit) {
723 if (heapinfo2->busy_frag.frag_size[j] > 0) {
724 if (state->equals_to2_(i, j).valid == 0) {
725 if (XBT_LOG_ISENABLED(mc_diff, xbt_log_priority_debug)) {
726 // TODO, print address of the block
728 ("Block %zu, Fragment %zu not found (size used = %zd)",
730 heapinfo2->busy_frag.frag_size[j]);
731 //mmalloc_backtrace_fragment_display((void*)heapinfo2, i, j);
741 if (i1 == state->heaplimit)
742 XBT_DEBUG("Number of blocks/fragments not found in heap2 : %d", nb_diff2);
744 xbt_dynar_free(&previous);
745 return ((nb_diff1 > 0) || (nb_diff2 > 0));
751 * @param real_area1 Process address for state 1
752 * @param real_area2 Process address for state 2
753 * @param snapshot1 Snapshot of state 1
754 * @param snapshot2 Snapshot of state 2
757 * @param check_ignore
759 static int compare_heap_area_without_type(struct s_mc_diff *state,
760 void *real_area1, void *real_area2,
761 mc_snapshot_t snapshot1,
762 mc_snapshot_t snapshot2,
763 xbt_dynar_t previous, int size,
768 void *addr_pointed1, *addr_pointed2;
769 int pointer_align, res_compare;
770 ssize_t ignore1, ignore2;
772 mc_mem_region_t heap_region1 = snapshot1->regions[0];
773 mc_mem_region_t heap_region2 = snapshot2->regions[0];
777 if (check_ignore > 0) {
779 heap_comparison_ignore_size(state->to_ignore1,
780 (char *) real_area1 + i)) != -1) {
782 heap_comparison_ignore_size(state->to_ignore2,
783 (char *) real_area2 + i)) == ignore1) {
796 if (mc_snapshot_region_memcmp(((char *) real_area1) + i, heap_region1, ((char *) real_area2) + i, heap_region2, 1) != 0) {
798 pointer_align = (i / sizeof(void *)) * sizeof(void *);
799 addr_pointed1 = mc_snapshot_read_pointer((char *) real_area1 + pointer_align, snapshot1);
800 addr_pointed2 = mc_snapshot_read_pointer((char *) real_area2 + pointer_align, snapshot2);
802 if (addr_pointed1 > maestro_stack_start
803 && addr_pointed1 < maestro_stack_end
804 && addr_pointed2 > maestro_stack_start
805 && addr_pointed2 < maestro_stack_end) {
806 i = pointer_align + sizeof(void *);
808 } else if (addr_pointed1 > state->s_heap
809 && addr_pointed1 < mc_snapshot_get_heap_end(snapshot1)
810 && addr_pointed2 > state->s_heap
811 && addr_pointed2 < mc_snapshot_get_heap_end(snapshot2)) {
812 // Both addreses are in the heap:
814 compare_heap_area(addr_pointed1, addr_pointed2, snapshot1,
815 snapshot2, previous, NULL, 0);
816 if (res_compare == 1) {
819 i = pointer_align + sizeof(void *);
838 * @param real_area1 Process address for state 1
839 * @param real_area2 Process address for state 2
840 * @param snapshot1 Snapshot of state 1
841 * @param snapshot2 Snapshot of state 2
844 * @param area_size either a byte_size or an elements_count (?)
845 * @param check_ignore
846 * @param pointer_level
847 * @return 0 (same), 1 (different), -1 (unknown)
849 static int compare_heap_area_with_type(struct s_mc_diff *state,
850 void *real_area1, void *real_area2,
851 mc_snapshot_t snapshot1,
852 mc_snapshot_t snapshot2,
853 xbt_dynar_t previous, dw_type_t type,
854 int area_size, int check_ignore,
858 if (is_stack(real_area1) && is_stack(real_area2))
861 ssize_t ignore1, ignore2;
863 if ((check_ignore > 0)
864 && ((ignore1 = heap_comparison_ignore_size(state->to_ignore1, real_area1))
866 && ((ignore2 = heap_comparison_ignore_size(state->to_ignore2, real_area2))
871 dw_type_t subtype, subsubtype;
872 int res, elm_size, i;
873 unsigned int cursor = 0;
875 void *addr_pointed1, *addr_pointed2;;
877 mc_mem_region_t heap_region1 = snapshot1->regions[0];
878 mc_mem_region_t heap_region2 = snapshot2->regions[0];
880 switch (type->type) {
881 case DW_TAG_unspecified_type:
884 case DW_TAG_base_type:
885 if (type->name != NULL && strcmp(type->name, "char") == 0) { /* String, hence random (arbitrary ?) size */
886 if (real_area1 == real_area2)
889 return (mc_snapshot_region_memcmp(real_area1, heap_region1, real_area2, heap_region2, area_size) != 0);
891 if (area_size != -1 && type->byte_size != area_size)
894 return (mc_snapshot_region_memcmp(real_area1, heap_region1, real_area2, heap_region2, type->byte_size) != 0);
898 case DW_TAG_enumeration_type:
899 if (area_size != -1 && type->byte_size != area_size)
902 return (mc_snapshot_region_memcmp(real_area1, heap_region1, real_area2, heap_region2, type->byte_size) != 0);
905 case DW_TAG_const_type:
906 case DW_TAG_volatile_type:
908 type = type->subtype;
911 case DW_TAG_array_type:
912 subtype = type->subtype;
913 switch (subtype->type) {
914 case DW_TAG_unspecified_type:
917 case DW_TAG_base_type:
918 case DW_TAG_enumeration_type:
919 case DW_TAG_pointer_type:
920 case DW_TAG_reference_type:
921 case DW_TAG_rvalue_reference_type:
922 case DW_TAG_structure_type:
923 case DW_TAG_class_type:
924 case DW_TAG_union_type:
925 if (subtype->full_type)
926 subtype = subtype->full_type;
927 elm_size = subtype->byte_size;
929 // TODO, just remove the type indirection?
930 case DW_TAG_const_type:
932 case DW_TAG_volatile_type:
933 subsubtype = subtype->subtype;
934 if (subsubtype->full_type)
935 subsubtype = subsubtype->full_type;
936 elm_size = subsubtype->byte_size;
942 for (i = 0; i < type->element_count; i++) {
943 // TODO, add support for variable stride (DW_AT_byte_stride)
945 compare_heap_area_with_type(state,
946 (char *) real_area1 + (i * elm_size),
947 (char *) real_area2 + (i * elm_size),
948 snapshot1, snapshot2, previous,
949 type->subtype, subtype->byte_size,
950 check_ignore, pointer_level);
955 case DW_TAG_reference_type:
956 case DW_TAG_rvalue_reference_type:
957 case DW_TAG_pointer_type:
958 if (type->subtype && type->subtype->type == DW_TAG_subroutine_type) {
959 addr_pointed1 = mc_snapshot_read_pointer(real_area1, snapshot1);
960 addr_pointed2 = mc_snapshot_read_pointer(real_area2, snapshot2);
961 return (addr_pointed1 != addr_pointed2);;
964 if (pointer_level > 1) { /* Array of pointers */
965 for (i = 0; i < (area_size / sizeof(void *)); i++) {
966 addr_pointed1 = mc_snapshot_read_pointer((char*) real_area1 + i * sizeof(void *), snapshot1);
967 addr_pointed2 = mc_snapshot_read_pointer((char*) real_area2 + i * sizeof(void *), snapshot2);
968 if (addr_pointed1 > state->s_heap
969 && addr_pointed1 < mc_snapshot_get_heap_end(snapshot1)
970 && addr_pointed2 > state->s_heap
971 && addr_pointed2 < mc_snapshot_get_heap_end(snapshot2))
973 compare_heap_area(addr_pointed1, addr_pointed2, snapshot1,
974 snapshot2, previous, type->subtype,
977 res = (addr_pointed1 != addr_pointed2);
982 addr_pointed1 = mc_snapshot_read_pointer(real_area1, snapshot1);
983 addr_pointed2 = mc_snapshot_read_pointer(real_area2, snapshot2);
984 if (addr_pointed1 > state->s_heap
985 && addr_pointed1 < mc_snapshot_get_heap_end(snapshot1)
986 && addr_pointed2 > state->s_heap
987 && addr_pointed2 < mc_snapshot_get_heap_end(snapshot2))
988 return compare_heap_area(addr_pointed1, addr_pointed2, snapshot1,
989 snapshot2, previous, type->subtype,
992 return (addr_pointed1 != addr_pointed2);
996 case DW_TAG_structure_type:
997 case DW_TAG_class_type:
999 type = type->full_type;
1000 if (area_size != -1 && type->byte_size != area_size) {
1001 if (area_size > type->byte_size && area_size % type->byte_size == 0) {
1002 for (i = 0; i < (area_size / type->byte_size); i++) {
1004 compare_heap_area_with_type(state,
1005 (char *) real_area1 + i * type->byte_size,
1006 (char *) real_area2 + i * type->byte_size,
1007 snapshot1, snapshot2, previous, type, -1,
1017 xbt_dynar_foreach(type->members, cursor, member) {
1018 // TODO, optimize this? (for the offset case)
1019 char *real_member1 =
1020 mc_member_resolve(real_area1, type, member, snapshot1);
1021 char *real_member2 =
1022 mc_member_resolve(real_area2, type, member, snapshot2);
1024 compare_heap_area_with_type(state, real_member1, real_member2,
1025 snapshot1, snapshot2,
1026 previous, member->subtype, -1,
1034 case DW_TAG_union_type:
1035 return compare_heap_area_without_type(state, real_area1, real_area2,
1036 snapshot1, snapshot2, previous,
1037 type->byte_size, check_ignore);
1047 /** Infer the type of a part of the block from the type of the block
1049 * TODO, handle DW_TAG_array_type as well as arrays of the object ((*p)[5], p[5])
1051 * TODO, handle subfields ((*p).bar.foo, (*p)[5].bar…)
1053 * @param type_id DWARF type ID of the root address
1055 * @return DWARF type ID for given offset
1057 static dw_type_t get_offset_type(void *real_base_address, dw_type_t type,
1058 int offset, int area_size,
1059 mc_snapshot_t snapshot)
1062 // Beginning of the block, the infered variable type if the type of the block:
1066 switch (type->type) {
1067 case DW_TAG_structure_type:
1068 case DW_TAG_class_type:
1069 if (type->full_type)
1070 type = type->full_type;
1072 if (area_size != -1 && type->byte_size != area_size) {
1073 if (area_size > type->byte_size && area_size % type->byte_size == 0)
1078 unsigned int cursor = 0;
1080 xbt_dynar_foreach(type->members, cursor, member) {
1082 if (!member->location.size) {
1083 // We have the offset, use it directly (shortcut):
1084 if (member->offset == offset)
1085 return member->subtype;
1088 mc_member_resolve(real_base_address, type, member, snapshot);
1089 if (real_member - (char *) real_base_address == offset)
1090 return member->subtype;
1098 /* FIXME : other cases ? */
1106 * @param area1 Process address for state 1
1107 * @param area2 Process address for state 2
1108 * @param snapshot1 Snapshot of state 1
1109 * @param snapshot2 Snapshot of state 2
1110 * @param previous Pairs of blocks already compared on the current path (or NULL)
1111 * @param type_id Type of variable
1112 * @param pointer_level
1113 * @return 0 (same), 1 (different), -1
1115 int compare_heap_area(void *area1, void *area2, mc_snapshot_t snapshot1,
1116 mc_snapshot_t snapshot2, xbt_dynar_t previous,
1117 dw_type_t type, int pointer_level)
1120 struct s_mc_diff *state = mc_diff_info;
1123 ssize_t block1, frag1, block2, frag2;
1125 int check_ignore = 0;
1127 void *real_addr_block1, *real_addr_block2, *real_addr_frag1, *real_addr_frag2;
1129 int offset1 = 0, offset2 = 0;
1130 int new_size1 = -1, new_size2 = -1;
1131 dw_type_t new_type1 = NULL, new_type2 = NULL;
1133 int match_pairs = 0;
1135 malloc_info* heapinfos1 = mc_snapshot_read_pointer(&((xbt_mheap_t)std_heap)->heapinfo, snapshot1);
1136 malloc_info* heapinfos2 = mc_snapshot_read_pointer(&((xbt_mheap_t)std_heap)->heapinfo, snapshot2);
1138 malloc_info heapinfo_temp1, heapinfo_temp2;
1140 void* real_area1_to_compare = area1;
1141 void* real_area2_to_compare = area2;
1143 if (previous == NULL) {
1145 xbt_dynar_new(sizeof(heap_area_pair_t), heap_area_pair_free_voidp);
1148 // Get block number:
1151 (char *) ((xbt_mheap_t) state->s_heap)->heapbase) / BLOCKSIZE + 1;
1154 (char *) ((xbt_mheap_t) state->s_heap)->heapbase) / BLOCKSIZE + 1;
1156 // If either block is a stack block:
1157 if (is_block_stack((int) block1) && is_block_stack((int) block2)) {
1158 add_heap_area_pair(previous, block1, -1, block2, -1);
1160 match_equals(state, previous);
1161 xbt_dynar_free(&previous);
1165 // If either block is not in the expected area of memory:
1166 if (((char *) area1 < (char *) ((xbt_mheap_t) state->s_heap)->heapbase)
1167 || (block1 > state->heapsize1) || (block1 < 1)
1168 || ((char *) area2 < (char *) ((xbt_mheap_t) state->s_heap)->heapbase)
1169 || (block2 > state->heapsize2) || (block2 < 1)) {
1171 xbt_dynar_free(&previous);
1176 // Process address of the block:
1178 ((void *) (((ADDR2UINT(block1)) - 1) * BLOCKSIZE +
1179 (char *) ((xbt_mheap_t) state->s_heap)->heapbase));
1181 ((void *) (((ADDR2UINT(block2)) - 1) * BLOCKSIZE +
1182 (char *) ((xbt_mheap_t) state->s_heap)->heapbase));
1186 if (type->full_type)
1187 type = type->full_type;
1189 // This assume that for "boring" types (volatile ...) byte_size is absent:
1190 while (type->byte_size == 0 && type->subtype != NULL)
1191 type = type->subtype;
1194 if ((type->type == DW_TAG_pointer_type)
1195 || ((type->type == DW_TAG_base_type) && type->name != NULL
1196 && (!strcmp(type->name, "char"))))
1199 type_size = type->byte_size;
1203 mc_mem_region_t heap_region1 = snapshot1->regions[0];
1204 mc_mem_region_t heap_region2 = snapshot2->regions[0];
1206 malloc_info* heapinfo1 = mc_snapshot_read_region(&heapinfos1[block1], heap_region1, &heapinfo_temp1, sizeof(malloc_info));
1207 malloc_info* heapinfo2 = mc_snapshot_read_region(&heapinfos2[block2], heap_region2, &heapinfo_temp2, sizeof(malloc_info));
1209 if ((heapinfo1->type == -1) && (heapinfo2->type == -1)) { /* Free block */
1212 match_equals(state, previous);
1213 xbt_dynar_free(&previous);
1217 } else if ((heapinfo1->type == 0) && (heapinfo2->type == 0)) { /* Complete block */
1219 // TODO, lookup variable type from block type as done for fragmented blocks
1221 offset1 = (char *) area1 - (char *) real_addr_block1;
1222 offset2 = (char *) area2 - (char *) real_addr_block2;
1224 if (state->equals_to1_(block1, 0).valid
1225 && state->equals_to2_(block2, 0).valid) {
1226 if (equal_blocks(state, block1, block2)) {
1228 match_equals(state, previous);
1229 xbt_dynar_free(&previous);
1235 if (type_size != -1) {
1236 if (type_size != heapinfo1->busy_block.busy_size
1237 && type_size != heapinfo2->busy_block.busy_size
1238 && (type->name == NULL || !strcmp(type->name, "struct s_smx_context"))) {
1240 match_equals(state, previous);
1241 xbt_dynar_free(&previous);
1247 if (heapinfo1->busy_block.size !=
1248 heapinfo2->busy_block.size) {
1250 xbt_dynar_free(&previous);
1255 if (heapinfo1->busy_block.busy_size !=
1256 heapinfo2->busy_block.busy_size) {
1258 xbt_dynar_free(&previous);
1263 if (!add_heap_area_pair(previous, block1, -1, block2, -1)) {
1265 match_equals(state, previous);
1266 xbt_dynar_free(&previous);
1271 size = heapinfo1->busy_block.busy_size;
1273 // Remember (basic) type inference.
1274 // The current data structure only allows us to do this for the whole block.
1275 if (type != NULL && area1 == real_addr_block1) {
1276 state->types1_(block1, 0) = type;
1278 if (type != NULL && area2 == real_addr_block2) {
1279 state->types2_(block2, 0) = type;
1284 match_equals(state, previous);
1285 xbt_dynar_free(&previous);
1293 if ((heapinfo1->busy_block.ignore > 0)
1294 && (heapinfo2->busy_block.ignore ==
1295 heapinfo1->busy_block.ignore))
1296 check_ignore = heapinfo1->busy_block.ignore;
1298 } else if ((heapinfo1->type > 0) && (heapinfo2->type > 0)) { /* Fragmented block */
1302 ((uintptr_t) (ADDR2UINT(area1) % (BLOCKSIZE))) >> heapinfo1->type;
1304 ((uintptr_t) (ADDR2UINT(area2) % (BLOCKSIZE))) >> heapinfo2->type;
1306 // Process address of the fragment:
1308 (void *) ((char *) real_addr_block1 +
1309 (frag1 << heapinfo1->type));
1311 (void *) ((char *) real_addr_block2 +
1312 (frag2 << heapinfo2->type));
1314 // Check the size of the fragments against the size of the type:
1315 if (type_size != -1) {
1316 if (heapinfo1->busy_frag.frag_size[frag1] == -1
1317 || heapinfo2->busy_frag.frag_size[frag2] == -1) {
1319 match_equals(state, previous);
1320 xbt_dynar_free(&previous);
1325 if (type_size != heapinfo1->busy_frag.frag_size[frag1]
1326 || type_size != heapinfo2->busy_frag.frag_size[frag2]) {
1328 match_equals(state, previous);
1329 xbt_dynar_free(&previous);
1335 // Check if the blocks are already matched together:
1336 if (state->equals_to1_(block1, frag1).valid
1337 && state->equals_to2_(block2, frag2).valid) {
1338 if (offset1==offset2 && equal_fragments(state, block1, frag1, block2, frag2)) {
1340 match_equals(state, previous);
1341 xbt_dynar_free(&previous);
1346 // Compare the size of both fragments:
1347 if (heapinfo1->busy_frag.frag_size[frag1] !=
1348 heapinfo2->busy_frag.frag_size[frag2]) {
1349 if (type_size == -1) {
1351 match_equals(state, previous);
1352 xbt_dynar_free(&previous);
1357 xbt_dynar_free(&previous);
1363 // Size of the fragment:
1364 size = heapinfo1->busy_frag.frag_size[frag1];
1366 // Remember (basic) type inference.
1367 // The current data structure only allows us to do this for the whole fragment.
1368 if (type != NULL && area1 == real_addr_frag1) {
1369 state->types1_(block1, frag1) = type;
1371 if (type != NULL && area2 == real_addr_frag2) {
1372 state->types2_(block2, frag2) = type;
1374 // The type of the variable is already known:
1379 // Type inference from the block type.
1380 else if (state->types1_(block1, frag1) != NULL
1381 || state->types2_(block2, frag2) != NULL) {
1383 offset1 = (char *) area1 - (char *) real_addr_frag1;
1384 offset2 = (char *) area2 - (char *) real_addr_frag2;
1386 if (state->types1_(block1, frag1) != NULL
1387 && state->types2_(block2, frag2) != NULL) {
1389 get_offset_type(real_addr_frag1, state->types1_(block1, frag1),
1390 offset1, size, snapshot1);
1392 get_offset_type(real_addr_frag2, state->types2_(block2, frag2),
1393 offset1, size, snapshot2);
1394 } else if (state->types1_(block1, frag1) != NULL) {
1396 get_offset_type(real_addr_frag1, state->types1_(block1, frag1),
1397 offset1, size, snapshot1);
1399 get_offset_type(real_addr_frag2, state->types1_(block1, frag1),
1400 offset2, size, snapshot2);
1401 } else if (state->types2_(block2, frag2) != NULL) {
1403 get_offset_type(real_addr_frag1, state->types2_(block2, frag2),
1404 offset1, size, snapshot1);
1406 get_offset_type(real_addr_frag2, state->types2_(block2, frag2),
1407 offset2, size, snapshot2);
1410 match_equals(state, previous);
1411 xbt_dynar_free(&previous);
1416 if (new_type1 != NULL && new_type2 != NULL && new_type1 != new_type2) {
1419 while (type->byte_size == 0 && type->subtype != NULL)
1420 type = type->subtype;
1421 new_size1 = type->byte_size;
1424 while (type->byte_size == 0 && type->subtype != NULL)
1425 type = type->subtype;
1426 new_size2 = type->byte_size;
1430 match_equals(state, previous);
1431 xbt_dynar_free(&previous);
1437 if (new_size1 > 0 && new_size1 == new_size2) {
1442 if (offset1 == 0 && offset2 == 0) {
1443 if (!add_heap_area_pair(previous, block1, frag1, block2, frag2)) {
1445 match_equals(state, previous);
1446 xbt_dynar_free(&previous);
1454 match_equals(state, previous);
1455 xbt_dynar_free(&previous);
1460 if ((heapinfo1->busy_frag.ignore[frag1] > 0)
1461 && (heapinfo2->busy_frag.ignore[frag2] ==
1462 heapinfo1->busy_frag.ignore[frag1]))
1463 check_ignore = heapinfo1->busy_frag.ignore[frag1];
1468 xbt_dynar_free(&previous);
1475 /* Start comparison */
1478 compare_heap_area_with_type(state, real_area1_to_compare, real_area2_to_compare, snapshot1, snapshot2,
1479 previous, type, size, check_ignore,
1483 compare_heap_area_without_type(state, real_area1_to_compare, real_area2_to_compare, snapshot1, snapshot2,
1484 previous, size, check_ignore);
1486 if (res_compare == 1) {
1488 xbt_dynar_free(&previous);
1493 match_equals(state, previous);
1494 xbt_dynar_free(&previous);
1500 /*********************************************** Miscellaneous ***************************************************/
1501 /****************************************************************************************************************/
1503 // Not used and broken code:
1507 static int get_pointed_area_size(void *area, int heap)
1510 struct s_mc_diff *state = mc_diff_info;
1513 malloc_info *heapinfo;
1516 heapinfo = state->heapinfo1;
1518 heapinfo = state->heapinfo2;
1522 (char *) ((xbt_mheap_t) state->s_heap)->heapbase) / BLOCKSIZE + 1;
1524 if (((char *) area < (char *) ((xbt_mheap_t) state->s_heap)->heapbase)
1525 || (block > state->heapsize1) || (block < 1))
1528 if (heapinfo[block].type == -1) { /* Free block */
1530 } else if (heapinfo[block].type == 0) { /* Complete block */
1531 return (int) heapinfo[block].busy_block.busy_size;
1534 ((uintptr_t) (ADDR2UINT(area) % (BLOCKSIZE))) >> heapinfo[block].type;
1535 return (int) heapinfo[block].busy_frag.frag_size[frag];
1540 char *get_type_description(mc_object_info_t info, char *type_name)
1543 xbt_dict_cursor_t dict_cursor;
1547 xbt_dict_foreach(info->types, dict_cursor, type_origin, type) {
1548 if (type->name && (strcmp(type->name, type_name) == 0)
1549 && type->byte_size > 0) {
1550 xbt_dict_cursor_free(&dict_cursor);
1555 xbt_dict_cursor_free(&dict_cursor);
1561 #define max( a, b ) ( ((a) > (b)) ? (a) : (b) )
1565 int mmalloc_linear_compare_heap(xbt_mheap_t heap1, xbt_mheap_t heap2)
1568 struct s_mc_diff *state = mc_diff_info;
1570 if (heap1 == NULL && heap1 == NULL) {
1571 XBT_DEBUG("Malloc descriptors null");
1575 if (heap1->heaplimit != heap2->heaplimit) {
1576 XBT_DEBUG("Different limit of valid info table indices");
1580 /* Heap information */
1581 state->heaplimit = ((struct mdesc *) heap1)->heaplimit;
1584 // Mamailloute in order to find the base address of the main heap:
1586 (char *) mmalloc_get_current_heap() - STD_HEAP_SIZE - xbt_pagesize;
1588 state->heapbase1 = (char *) heap1 + BLOCKSIZE;
1589 state->heapbase2 = (char *) heap2 + BLOCKSIZE;
1592 (malloc_info *) ((char *) heap1 +
1594 ((char *) heap1->heapinfo - (char *) state->s_heap)));
1596 (malloc_info *) ((char *) heap2 +
1598 ((char *) heap2->heapinfo - (char *) state->s_heap)));
1600 state->heapsize1 = heap1->heapsize;
1601 state->heapsize2 = heap2->heapsize;
1603 /* Start comparison */
1605 void *addr_block1, *addr_block2, *addr_frag1, *addr_frag2;
1609 /* Check busy blocks */
1613 while (i <= state->heaplimit) {
1616 ((void *) (((ADDR2UINT(i)) - 1) * BLOCKSIZE +
1617 (char *) state->heapbase1));
1619 ((void *) (((ADDR2UINT(i)) - 1) * BLOCKSIZE +
1620 (char *) state->heapbase2));
1622 if (state->heapinfo1[i].type != state->heapinfo2[i].type) {
1624 distance += BLOCKSIZE;
1625 XBT_DEBUG("Different type of blocks (%zu) : %d - %d -> distance = %d", i,
1626 state->heapinfo1[i].type, state->heapinfo2[i].type, distance);
1631 if (state->heapinfo1[i].type == -1) { /* Free block */
1636 if (state->heapinfo1[i].type == 0) { /* Large block */
1638 if (state->heapinfo1[i].busy_block.size !=
1639 state->heapinfo2[i].busy_block.size) {
1641 BLOCKSIZE * max(state->heapinfo1[i].busy_block.size,
1642 state->heapinfo2[i].busy_block.size);
1643 i += max(state->heapinfo1[i].busy_block.size,
1644 state->heapinfo2[i].busy_block.size);
1646 ("Different larger of cluster at block %zu : %zu - %zu -> distance = %d",
1647 i, state->heapinfo1[i].busy_block.size,
1648 state->heapinfo2[i].busy_block.size, distance);
1652 /*if(heapinfo1[i].busy_block.busy_size != heapinfo2[i].busy_block.busy_size){
1653 distance += max(heapinfo1[i].busy_block.busy_size, heapinfo2[i].busy_block.busy_size);
1654 i += max(heapinfo1[i].busy_block.size, heapinfo2[i].busy_block.size);
1655 XBT_DEBUG("Different size used oin large cluster at block %zu : %zu - %zu -> distance = %d", i, heapinfo1[i].busy_block.busy_size, heapinfo2[i].busy_block.busy_size, distance);
1661 //while(k < (heapinfo1[i].busy_block.busy_size)){
1662 while (k < state->heapinfo1[i].busy_block.size * BLOCKSIZE) {
1663 if (memcmp((char *) addr_block1 + k, (char *) addr_block2 + k, 1) !=
1672 } else { /* Fragmented block */
1674 for (j = 0; j < (size_t) (BLOCKSIZE >> state->heapinfo1[i].type); j++) {
1677 (void *) ((char *) addr_block1 + (j << state->heapinfo1[i].type));
1679 (void *) ((char *) addr_block2 + (j << state->heapinfo2[i].type));
1681 if (state->heapinfo1[i].busy_frag.frag_size[j] == 0
1682 && state->heapinfo2[i].busy_frag.frag_size[j] == 0) {
1687 /*if(heapinfo1[i].busy_frag.frag_size[j] != heapinfo2[i].busy_frag.frag_size[j]){
1688 distance += max(heapinfo1[i].busy_frag.frag_size[j], heapinfo2[i].busy_frag.frag_size[j]);
1689 XBT_DEBUG("Different size used in fragment %zu in block %zu : %d - %d -> distance = %d", j, i, heapinfo1[i].busy_frag.frag_size[j], heapinfo2[i].busy_frag.frag_size[j], distance);
1695 //while(k < max(heapinfo1[i].busy_frag.frag_size[j], heapinfo2[i].busy_frag.frag_size[j])){
1696 while (k < (BLOCKSIZE / (BLOCKSIZE >> state->heapinfo1[i].type))) {
1697 if (memcmp((char *) addr_frag1 + k, (char *) addr_frag2 + k, 1) !=