#include "xbt/ex_interface.h" /* internals of backtrace setup */
#include "xbt/str.h"
#include "mc/mc.h"
+#include "xbt/mmalloc.h"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mm_diff, xbt,
"Logging specific to mm_diff in mmalloc");
-extern char *xbt_binary_name;
-
-xbt_dynar_t mmalloc_ignore;
-
-typedef struct s_heap_area_pair{
- int block1;
- int fragment1;
- int block2;
- int fragment2;
-}s_heap_area_pair_t, *heap_area_pair_t;
+xbt_dynar_t mc_heap_comparison_ignore;
+xbt_dynar_t stacks_areas;
static void heap_area_pair_free(heap_area_pair_t pair);
static void heap_area_pair_free_voidp(void *d);
static int add_heap_area_pair(xbt_dynar_t list, int block1, int fragment1, int block2, int fragment2);
static int is_new_heap_area_pair(xbt_dynar_t list, int block1, int fragment1, int block2, int fragment2);
+static heap_area_t new_heap_area(int block, int fragment);
static int compare_area(void *area1, void* area2, size_t size, xbt_dynar_t previous, int check_ignore);
-static void match_equals(xbt_dynar_t list);
-
-static int in_mmalloc_ignore(int block, int fragment);
-static size_t heap_comparison_ignore(void *address);
-
-void mmalloc_backtrace_block_display(void* heapinfo, int block){
-
- xbt_ex_t e;
-
- if (((malloc_info *)heapinfo)[block].busy_block.bt_size == 0) {
- XBT_DEBUG("No backtrace available for that block, sorry.");
- return;
- }
+static void match_equals(xbt_dynar_t list, xbt_dynar_t *equals);
- memcpy(&e.bt,&(((malloc_info *)heapinfo)[block].busy_block.bt),sizeof(void*)*XBT_BACKTRACE_SIZE);
- e.used = ((malloc_info *)heapinfo)[block].busy_block.bt_size;
+static int in_mc_comparison_ignore(int block, int fragment);
+static size_t heap_comparison_ignore_size(void *address);
+static void add_heap_equality(xbt_dynar_t *equals, void *a1, void *a2);
+static void remove_heap_equality(xbt_dynar_t *equals, int address, void *a);
- xbt_ex_setup_backtrace(&e);
- if (e.used == 0) {
- XBT_DEBUG("(backtrace not set)");
- } else if (e.bt_strings == NULL) {
- XBT_DEBUG("(backtrace not ready to be computed. %s)",xbt_binary_name?"Dunno why":"xbt_binary_name not setup yet");
- } else {
- int i;
+static char* is_stack(void *address);
- XBT_DEBUG("Backtrace of where the block %d was malloced (%d frames):", block ,e.used);
- for (i = 0; i < e.used; i++) /* no need to display "xbt_backtrace_display" */{
- XBT_DEBUG("%d ---> %s",i, e.bt_strings[i] + 4);
- }
- }
+void mmalloc_backtrace_block_display(void* heapinfo, int block){
+ /* xbt_ex_t e; */
+
+ /* if (((malloc_info *)heapinfo)[block].busy_block.bt_size == 0) { */
+ /* fprintf(stderr, "No backtrace available for that block, sorry.\n"); */
+ /* return; */
+ /* } */
+
+ /* memcpy(&e.bt,&(((malloc_info *)heapinfo)[block].busy_block.bt),sizeof(void*)*XBT_BACKTRACE_SIZE); */
+ /* e.used = ((malloc_info *)heapinfo)[block].busy_block.bt_size; */
+
+ /* xbt_ex_setup_backtrace(&e); */
+ /* if (e.used == 0) { */
+ /* fprintf(stderr, "(backtrace not set)\n"); */
+ /* } else if (e.bt_strings == NULL) { */
+ /* fprintf(stderr, "(backtrace not ready to be computed. %s)\n",xbt_binary_name?"Dunno why":"xbt_binary_name not setup yet"); */
+ /* } else { */
+ /* int i; */
+
+ /* fprintf(stderr, "Backtrace of where the block %d was malloced (%d frames):\n", block ,e.used); */
+ /* for (i = 0; i < e.used; i++) /\* no need to display "xbt_backtrace_display" *\/{ */
+ /* fprintf(stderr, "%d ---> %s\n",i, e.bt_strings[i] + 4); */
+ /* } */
+ /* } */
}
void mmalloc_backtrace_fragment_display(void* heapinfo, int block, int frag){
- xbt_ex_t e;
+ /* xbt_ex_t e; */
- memcpy(&e.bt,&(((malloc_info *)heapinfo)[block].busy_frag.bt[frag]),sizeof(void*)*XBT_BACKTRACE_SIZE);
- e.used = XBT_BACKTRACE_SIZE;
+ /* memcpy(&e.bt,&(((malloc_info *)heapinfo)[block].busy_frag.bt[frag]),sizeof(void*)*XBT_BACKTRACE_SIZE); */
+ /* e.used = XBT_BACKTRACE_SIZE; */
- xbt_ex_setup_backtrace(&e);
- if (e.used == 0) {
- XBT_DEBUG("(backtrace not set)");
- } else if (e.bt_strings == NULL) {
- XBT_DEBUG("(backtrace not ready to be computed. %s)",xbt_binary_name?"Dunno why":"xbt_binary_name not setup yet");
- } else {
- int i;
+ /* xbt_ex_setup_backtrace(&e); */
+ /* if (e.used == 0) { */
+ /* fprintf(stderr, "(backtrace not set)\n"); */
+ /* } else if (e.bt_strings == NULL) { */
+ /* fprintf(stderr, "(backtrace not ready to be computed. %s)\n",xbt_binary_name?"Dunno why":"xbt_binary_name not setup yet"); */
+ /* } else { */
+ /* int i; */
- XBT_DEBUG("Backtrace of where the fragment %d in block %d was malloced (%d frames):", frag, block ,e.used);
- for (i = 0; i < e.used; i++) /* no need to display "xbt_backtrace_display" */{
- XBT_DEBUG("%d ---> %s",i, e.bt_strings[i] + 4);
- }
- }
+ /* fprintf(stderr, "Backtrace of where the fragment %d in block %d was malloced (%d frames):\n", frag, block ,e.used); */
+ /* for (i = 0; i < e.used; i++) /\* no need to display "xbt_backtrace_display" *\/{ */
+ /* fprintf(stderr, "%d ---> %s\n",i, e.bt_strings[i] + 4); */
+ /* } */
+ /* } */
}
-void *s_heap, *heapbase1, *heapbase2;
-malloc_info *heapinfo1, *heapinfo2;
-size_t heaplimit, heapsize1, heapsize2;
+void mmalloc_backtrace_display(void *addr){
+
+ /* size_t block, frag_nb; */
+ /* int type; */
+
+ /* xbt_mheap_t heap = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit(); */
+
+ /* block = (((char*) (addr) - (char*) heap -> heapbase) / BLOCKSIZE + 1); */
+
+ /* type = heap->heapinfo[block].type; */
+
+ /* switch(type){ */
+ /* case -1 : /\* Free block *\/ */
+ /* fprintf(stderr, "Asked to display the backtrace of a block that is free. I'm puzzled\n"); */
+ /* xbt_abort(); */
+ /* break; */
+ /* case 0: /\* Large block *\/ */
+ /* mmalloc_backtrace_block_display(heap->heapinfo, block); */
+ /* break; */
+ /* default: /\* Fragmented block *\/ */
+ /* frag_nb = RESIDUAL(addr, BLOCKSIZE) >> type; */
+ /* if(heap->heapinfo[block].busy_frag.frag_size[frag_nb] == -1){ */
+ /* fprintf(stderr , "Asked to display the backtrace of a fragment that is free. I'm puzzled\n"); */
+ /* xbt_abort(); */
+ /* } */
+ /* mmalloc_backtrace_fragment_display(heap->heapinfo, block, frag_nb); */
+ /* break; */
+ /* } */
+}
-int ignore_done;
-int mmalloc_compare_heap(xbt_mheap_t heap1, xbt_mheap_t heap2){
+void *s_heap = NULL, *heapbase1 = NULL, *heapbase2 = NULL;
+malloc_info *heapinfo1 = NULL, *heapinfo2 = NULL;
+size_t heaplimit = 0, heapsize1 = 0, heapsize2 = 0;
+
+int ignore_done = 0;
+
+int mmalloc_compare_heap(xbt_mheap_t heap1, xbt_mheap_t heap2, xbt_dynar_t *stack1, xbt_dynar_t *stack2, xbt_dynar_t *equals){
if(heap1 == NULL && heap1 == NULL){
XBT_DEBUG("Malloc descriptors null");
heapsize2 = heap2->heapsize;
/* Start comparison */
- size_t i1, i2, j1, j2, k;
+ size_t i1, i2, j1, j2, k, current_block, current_fragment;
void *addr_block1, *addr_block2, *addr_frag1, *addr_frag2;
- size_t frag_size1, frag_size2;
+ void *real_addr_block1, *real_addr_block2;
+ char *stack_name;
xbt_dynar_t previous = xbt_dynar_new(sizeof(heap_area_pair_t), heap_area_pair_free_voidp);
- int equal, res_compare;
-
- ignore_done = 0;
+ int equal, res_compare = 0;
/* Init equal information */
i1 = 1;
while(i1<=heaplimit){
if(heapinfo1[i1].type == 0){
- heapinfo1[i1].busy_block.equal_to = -1;
+ heapinfo1[i1].busy_block.equal_to = NULL;
}
if(heapinfo1[i1].type > 0){
- for(j1=0; j1 < MAX_FRAGMENT_PER_BLOCK; j1++){
- heapinfo1[i1].busy_frag.equal_to[j1] = -1;
+ for(j1=0; j1 < (size_t) (BLOCKSIZE >> heapinfo1[i1].type); j1++){
+ heapinfo1[i1].busy_frag.equal_to[j1] = NULL;
}
}
i1++;
while(i2<=heaplimit){
if(heapinfo2[i2].type == 0){
- heapinfo2[i2].busy_block.equal_to = -1;
+ heapinfo2[i2].busy_block.equal_to = NULL;
}
if(heapinfo2[i2].type > 0){
- for(j2=0; j2 < MAX_FRAGMENT_PER_BLOCK; j2++){
- heapinfo2[i2].busy_frag.equal_to[j2] = -1;
+ for(j2=0; j2 < (size_t) (BLOCKSIZE >> heapinfo2[i2].type); j2++){
+ heapinfo2[i2].busy_frag.equal_to[j2] = NULL;
}
}
i2++;
i1 = 1;
- while(i1 < heaplimit){
+ while(i1 <= heaplimit){
- i2 = 1;
- equal = 0;
+ current_block = i1;
if(heapinfo1[i1].type == -1){ /* Free block */
i1++;
}
addr_block1 = ((void*) (((ADDR2UINT(i1)) - 1) * BLOCKSIZE + (char*)heapbase1));
+ real_addr_block1 = (char*)((xbt_mheap_t)s_heap)->heapbase + (((char *)addr_block1) - (char *)heapbase1);
if(heapinfo1[i1].type == 0){ /* Large block */
+
+ if((stack_name = is_stack(real_addr_block1)) != NULL){
+ stack_region_t stack = xbt_new0(s_stack_region_t, 1);
+ stack->address = addr_block1;
+ stack->process_name = strdup(stack_name);
+ stack->size = heapinfo1[i1].busy_block.busy_size;
+ xbt_dynar_push(*stack1, &stack);
+ res_compare = -1;
+ }
+
+ if(heapinfo1[i1].busy_block.busy_size == 0){
+ i1++;
+ continue;
+ }
+
+ if(heapinfo1[i1].busy_block.equal_to != NULL){
+ i1++;
+ continue;
+ }
+
+ i2 = 1;
+ equal = 0;
+ res_compare = 0;
+
+ /* Try first to associate to same block in the other heap */
+ if(heapinfo2[current_block].type == heapinfo1[current_block].type){
+
+ if(heapinfo2[current_block].busy_block.equal_to == NULL){
+
+ if(heapinfo1[current_block].busy_block.busy_size == heapinfo2[current_block].busy_block.busy_size){
+
+ addr_block2 = ((void*) (((ADDR2UINT(current_block)) - 1) * BLOCKSIZE + (char*)heapbase2));
+ real_addr_block2 = (char*)((xbt_mheap_t)s_heap)->heapbase + (((char *)addr_block2) - (char *)heapbase2);
+
+ if((stack_name = is_stack(real_addr_block2)) != NULL){
+ stack_region_t stack = xbt_new0(s_stack_region_t, 1);
+ stack->address = addr_block2;
+ stack->process_name = strdup(stack_name);
+ stack->size = heapinfo2[current_block].busy_block.busy_size;
+ xbt_dynar_push(*stack2, &stack);
+ res_compare = -1;
+ }
+
+ add_heap_area_pair(previous, current_block, -1, current_block, -1);
+
+ if(res_compare != -1){
+ if((ignore_done < xbt_dynar_length(mc_heap_comparison_ignore)) && heapinfo1[current_block].busy_block.ignore == 1){
+ res_compare = compare_area(addr_block1, addr_block2, heapinfo1[current_block].busy_block.busy_size, previous, 1);
+ }else{
+ res_compare = compare_area(addr_block1, addr_block2, heapinfo1[current_block].busy_block.busy_size, previous, 0);
+ }
+ }
+
+ if(res_compare == 0 || res_compare == -1){
+ for(k=1; k < heapinfo2[current_block].busy_block.size; k++)
+ heapinfo2[current_block+k].busy_block.equal_to = new_heap_area(i1, -1);
+ for(k=1; k < heapinfo1[current_block].busy_block.size; k++)
+ heapinfo1[current_block+k].busy_block.equal_to = new_heap_area(i1, -1);
+ equal = 1;
+ match_equals(previous, equals);
+ i1 = i1 + heapinfo1[current_block].busy_block.size;
+ }
+
+ xbt_dynar_reset(previous);
+
+ }
+
+ }
+
+ }
while(i2 <= heaplimit && !equal){
+ addr_block2 = ((void*) (((ADDR2UINT(i2)) - 1) * BLOCKSIZE + (char*)heapbase2));
+ real_addr_block2 = (char*)((xbt_mheap_t)s_heap)->heapbase + (((char *)addr_block2) - (char *)heapbase2);
+
+ if((stack_name = is_stack(real_addr_block2)) != NULL){
+ stack_region_t stack = xbt_new0(s_stack_region_t, 1);
+ stack->address = addr_block2;
+ stack->process_name = strdup(stack_name);
+ stack->size = heapinfo2[i2].busy_block.busy_size;
+ xbt_dynar_push(*stack2, &stack);
+ res_compare = -1;
+ }
+
+ if(i2 == current_block){
+ i2++;
+ continue;
+ }
+
if(heapinfo2[i2].type != 0){
i2++;
continue;
}
- if(heapinfo2[i2].busy_block.equal_to == 1){
+ if(heapinfo2[i2].busy_block.equal_to != NULL){
i2++;
continue;
}
continue;
}
- addr_block2 = ((void*) (((ADDR2UINT(i2)) - 1) * BLOCKSIZE + (char*)heapbase2));
-
/* Comparison */
add_heap_area_pair(previous, i1, -1, i2, -1);
- if(ignore_done < xbt_dynar_length(mmalloc_ignore)){
- if(in_mmalloc_ignore((int)i1, -1))
+ if(res_compare != -1){
+ if((ignore_done < xbt_dynar_length(mc_heap_comparison_ignore)) && heapinfo1[i1].busy_block.ignore == 1){
res_compare = compare_area(addr_block1, addr_block2, heapinfo1[i1].busy_block.busy_size, previous, 1);
- else
+ }else{
res_compare = compare_area(addr_block1, addr_block2, heapinfo1[i1].busy_block.busy_size, previous, 0);
- }else{
- res_compare = compare_area(addr_block1, addr_block2, heapinfo1[i1].busy_block.busy_size, previous, 0);
+ }
}
- if(!res_compare){
- for(k=0; k < heapinfo2[i2].busy_block.size; k++)
- heapinfo2[i2+k].busy_block.equal_to = 1;
- for(k=0; k < heapinfo1[i1].busy_block.size; k++)
- heapinfo1[i1+k].busy_block.equal_to = 1;
+ if(res_compare == 0 || res_compare == -1){
+ for(k=1; k < heapinfo2[i2].busy_block.size; k++)
+ heapinfo2[i2+k].busy_block.equal_to = new_heap_area(i1, -1);
+ for(k=1; k < heapinfo1[i1].busy_block.size; k++)
+ heapinfo1[i1+k].busy_block.equal_to = new_heap_area(i2, -1);
equal = 1;
- match_equals(previous);
+ match_equals(previous, equals);
+ i1 = i1 + heapinfo1[i1].busy_block.size;
}
+
xbt_dynar_reset(previous);
i2++;
}
+ if(!equal)
+ i1++;
+
}else{ /* Fragmented block */
- frag_size1 = 1 << heapinfo1[i1].type;
-
for(j1=0; j1 < (size_t) (BLOCKSIZE >> heapinfo1[i1].type); j1++){
- if(heapinfo1[i1].busy_frag.frag_size[j1] == 0) /* Free fragment */
+ current_fragment = j1;
+
+ if(heapinfo1[i1].busy_frag.frag_size[j1] == -1) /* Free fragment */
continue;
-
- addr_frag1 = (void*) ((char *)addr_block1 + (j1 * frag_size1));
-
+
+ if(heapinfo1[i1].busy_frag.equal_to[j1] != NULL)
+ continue;
+
+ addr_frag1 = (void*) ((char *)addr_block1 + (j1 << heapinfo1[i1].type));
+
i2 = 1;
equal = 0;
+ /* Try first to associate to same fragment in the other heap */
+ if(heapinfo2[current_block].type == heapinfo1[current_block].type){
+
+ if(heapinfo2[current_block].busy_frag.equal_to[current_fragment] == NULL){
+
+ if(heapinfo1[current_block].busy_frag.frag_size[current_fragment] == heapinfo2[current_block].busy_frag.frag_size[current_fragment]){
+
+ addr_block2 = ((void*) (((ADDR2UINT(current_block)) - 1) * BLOCKSIZE + (char*)heapbase2));
+ addr_frag2 = (void*) ((char *)addr_block2 + (current_fragment << heapinfo2[current_block].type));
+
+ add_heap_area_pair(previous, current_block, current_fragment, current_block, current_fragment);
+
+ if((ignore_done < xbt_dynar_length(mc_heap_comparison_ignore)) && (heapinfo1[current_block].busy_frag.ignore[current_fragment] == 1)){
+ res_compare = compare_area(addr_frag1, addr_frag2, heapinfo1[current_block].busy_frag.frag_size[current_fragment], previous, 1);
+ }else{
+ res_compare = compare_area(addr_frag1, addr_frag2, heapinfo1[current_block].busy_frag.frag_size[current_fragment], previous, 0);
+ }
+
+ if(res_compare == 0){
+ equal = 1;
+ match_equals(previous, equals);
+ }
+
+ xbt_dynar_reset(previous);
+
+ }
+
+ }
+ }
+
while(i2 <= heaplimit && !equal){
+
if(heapinfo2[i2].type <= 0){
i2++;
continue;
}
-
- frag_size2 = 1 << heapinfo2[i2].type;
for(j2=0; j2 < (size_t) (BLOCKSIZE >> heapinfo2[i2].type); j2++){
- if(heapinfo2[i2].busy_frag.equal_to[j2] == 1){
+ if(heapinfo2[i2].type == heapinfo1[i1].type && i2 == current_block && j2 == current_fragment)
+ continue;
+
+ if(heapinfo2[i2].busy_frag.equal_to[j2] != NULL)
continue;
- }
- if(heapinfo1[i1].busy_frag.frag_size[j1] != heapinfo2[i2].busy_frag.frag_size[j2]){ /* Different size_used */
+ if(heapinfo1[i1].busy_frag.frag_size[j1] != heapinfo2[i2].busy_frag.frag_size[j2]) /* Different size_used */
continue;
- }
addr_block2 = ((void*) (((ADDR2UINT(i2)) - 1) * BLOCKSIZE + (char*)heapbase2));
- addr_frag2 = (void*) ((char *)addr_block2 + (j2 * frag_size2));
+ addr_frag2 = (void*) ((char *)addr_block2 + (j2 << heapinfo2[i2].type));
/* Comparison */
add_heap_area_pair(previous, i1, j1, i2, j2);
- if(ignore_done < xbt_dynar_length(mmalloc_ignore)){
- if(in_mmalloc_ignore((int)i1, (int)j1))
- res_compare = compare_area(addr_frag1, addr_frag2, heapinfo1[i1].busy_frag.frag_size[j1], previous, 1);
- else
- res_compare = compare_area(addr_frag1, addr_frag2, heapinfo1[i1].busy_frag.frag_size[j1], previous, 0);
+ if((ignore_done < xbt_dynar_length(mc_heap_comparison_ignore)) && (heapinfo1[i1].busy_frag.ignore[j1] == 1)){
+ res_compare = compare_area(addr_frag1, addr_frag2, heapinfo1[i1].busy_frag.frag_size[j1], previous, 1);
}else{
res_compare = compare_area(addr_frag1, addr_frag2, heapinfo1[i1].busy_frag.frag_size[j1], previous, 0);
}
- if(!res_compare){
- heapinfo2[i2].busy_frag.equal_to[j2] = 1;
- heapinfo1[i1].busy_frag.equal_to[j1] = 1;
+ if(res_compare == 0){
equal = 1;
- match_equals(previous);
- xbt_dynar_reset(previous);
+ match_equals(previous, equals);
break;
}
}
+ i1++;
+
}
- i1++;
-
}
/* All blocks/fragments are equal to another block/fragment ? */
size_t i = 1, j = 0;
int nb_diff1 = 0, nb_diff2 = 0;
- size_t frag_size = 0;
while(i<heaplimit){
if(heapinfo1[i].type == 0){
if(heapinfo1[i].busy_block.busy_size > 0){
- if(heapinfo1[i].busy_block.equal_to == -1){
+ if(heapinfo1[i].busy_block.equal_to == NULL){
if(XBT_LOG_ISENABLED(mm_diff, xbt_log_priority_debug)){
addr_block1 = ((void*) (((ADDR2UINT(i)) - 1) * BLOCKSIZE + (char*)heapbase1));
XBT_DEBUG("Block %zu (%p) not found (size used = %zu)", i, addr_block1, heapinfo1[i].busy_block.busy_size);
- mmalloc_backtrace_block_display((void*)heapinfo1, i);
+ //mmalloc_backtrace_block_display((void*)heapinfo1, i);
}
nb_diff1++;
+ }else{
+ xbt_free(heapinfo1[i].busy_block.equal_to);
}
}
}
if(heapinfo1[i].type > 0){
- frag_size = 1 << heapinfo1[i].type;
+ addr_block1 = ((void*) (((ADDR2UINT(i)) - 1) * BLOCKSIZE + (char*)heapbase1));
for(j=0; j < (size_t) (BLOCKSIZE >> heapinfo1[i].type); j++){
if(heapinfo1[i].busy_frag.frag_size[j] > 0){
- if(heapinfo1[i].busy_frag.equal_to[j] == -1){
+ if(heapinfo1[i].busy_frag.equal_to[j] == NULL){
if(XBT_LOG_ISENABLED(mm_diff, xbt_log_priority_debug)){
- addr_block1 = ((void*) (((ADDR2UINT(i)) - 1) * BLOCKSIZE + (char*)heapbase1));
- addr_frag1 = (void*) ((char *)addr_block1 + (j * frag_size));
+ addr_frag1 = (void*) ((char *)addr_block1 + (j << heapinfo1[i].type));
XBT_DEBUG("Block %zu, Fragment %zu (%p) not found (size used = %d)", i, j, addr_frag1, heapinfo1[i].busy_frag.frag_size[j]);
- mmalloc_backtrace_fragment_display((void*)heapinfo1, i, j);
+ //mmalloc_backtrace_fragment_display((void*)heapinfo1, i, j);
}
nb_diff1++;
+ }else{
+ xbt_free(heapinfo1[i].busy_frag.equal_to[j]);
}
}
}
i++;
}
- XBT_DEBUG("Different blocks or fragments in heap1 : %d\n", nb_diff1);
+ XBT_DEBUG("Different blocks or fragments in heap1 : %d", nb_diff1);
i = 1;
while(i<heaplimit){
if(heapinfo2[i].type == 0){
if(heapinfo2[i].busy_block.busy_size > 0){
- if(heapinfo2[i].busy_block.equal_to == -1){
+ if(heapinfo2[i].busy_block.equal_to == NULL){
if(XBT_LOG_ISENABLED(mm_diff, xbt_log_priority_debug)){
addr_block2 = ((void*) (((ADDR2UINT(i)) - 1) * BLOCKSIZE + (char*)heapbase2));
XBT_DEBUG("Block %zu (%p) not found (size used = %zu)", i, addr_block2, heapinfo2[i].busy_block.busy_size);
- mmalloc_backtrace_block_display((void*)heapinfo2, i);
+ //mmalloc_backtrace_block_display((void*)heapinfo2, i);
}
nb_diff2++;
+ }else{
+ xbt_free(heapinfo2[i].busy_block.equal_to);
}
}
}
if(heapinfo2[i].type > 0){
- frag_size = 1 << heapinfo2[i].type;
+ addr_block2 = ((void*) (((ADDR2UINT(i)) - 1) * BLOCKSIZE + (char*)heapbase2));
for(j=0; j < (size_t) (BLOCKSIZE >> heapinfo2[i].type); j++){
if(heapinfo2[i].busy_frag.frag_size[j] > 0){
- if(heapinfo2[i].busy_frag.equal_to[j] == -1){
+ if(heapinfo2[i].busy_frag.equal_to[j] == NULL){
if(XBT_LOG_ISENABLED(mm_diff, xbt_log_priority_debug)){
- addr_block2 = ((void*) (((ADDR2UINT(i)) - 1) * BLOCKSIZE + (char*)heapbase2));
- addr_frag2 = (void*) ((char *)addr_block2 + (j * frag_size));
+ addr_frag2 = (void*) ((char *)addr_block2 + (j << heapinfo2[i].type));
XBT_DEBUG( "Block %zu, Fragment %zu (%p) not found (size used = %d)", i, j, addr_frag2, heapinfo2[i].busy_frag.frag_size[j]);
- mmalloc_backtrace_fragment_display((void*)heapinfo2, i, j);
+ //mmalloc_backtrace_fragment_display((void*)heapinfo2, i, j);
}
nb_diff2++;
+ }else{
+ xbt_free(heapinfo2[i].busy_frag.equal_to[j]);
}
}
}
i++;
}
- XBT_DEBUG("Different blocks or fragments in heap2 : %d\n", nb_diff2);
+ XBT_DEBUG("Different blocks or fragments in heap2 : %d", nb_diff2);
xbt_dynar_free(&previous);
-
+ ignore_done = 0;
+ s_heap = NULL, heapbase1 = NULL, heapbase2 = NULL;
+ heapinfo1 = NULL, heapinfo2 = NULL;
+ heaplimit = 0, heapsize1 = 0, heapsize2 = 0;
+
return ((nb_diff1 > 0) || (nb_diff2 > 0));
+}
+static heap_area_t new_heap_area(int block, int fragment){
+ heap_area_t area = NULL;
+ area = xbt_new0(s_heap_area_t, 1);
+ area->block = block;
+ area->fragment = fragment;
+ return area;
}
-static int in_mmalloc_ignore(int block, int fragment){
+static int in_mc_comparison_ignore(int block, int fragment){
unsigned int cursor = 0;
int start = 0;
- int end = xbt_dynar_length(mmalloc_ignore) - 1;
- mc_ignore_region_t region;
+ int end = xbt_dynar_length(mc_heap_comparison_ignore) - 1;
+ mc_heap_ignore_region_t region;
while(start <= end){
cursor = (start + end) / 2;
- region = (mc_ignore_region_t)xbt_dynar_get_as(mmalloc_ignore, cursor, mc_ignore_region_t);
+ region = (mc_heap_ignore_region_t)xbt_dynar_get_as(mc_heap_comparison_ignore, cursor, mc_heap_ignore_region_t);
if(region->block == block){
if(region->fragment == fragment)
return 1;
return 0;
}
-static size_t heap_comparison_ignore(void *address){
+static size_t heap_comparison_ignore_size(void *address){
unsigned int cursor = 0;
int start = 0;
- int end = xbt_dynar_length(mmalloc_ignore) - 1;
- mc_ignore_region_t region;
+ int end = xbt_dynar_length(mc_heap_comparison_ignore) - 1;
+ mc_heap_ignore_region_t region;
while(start <= end){
cursor = (start + end) / 2;
- region = (mc_ignore_region_t)xbt_dynar_get_as(mmalloc_ignore, cursor, mc_ignore_region_t);
+ region = (mc_heap_ignore_region_t)xbt_dynar_get_as(mc_heap_comparison_ignore, cursor, mc_heap_ignore_region_t);
if(region->address == address)
return region->size;
if(region->address < address)
size_t i = 0, pointer_align = 0, ignore1 = 0, ignore2 = 0;
void *address_pointed1, *address_pointed2, *addr_block_pointed1, *addr_block_pointed2, *addr_frag_pointed1, *addr_frag_pointed2;
size_t block_pointed1, block_pointed2, frag_pointed1, frag_pointed2;
- size_t frag_size, frag_size1, frag_size2;
int res_compare;
void *current_area1, *current_area2;
if(check_ignore){
current_area1 = (char*)((xbt_mheap_t)s_heap)->heapbase + ((((char *)area1) + i) - (char *)heapbase1);
- if((ignore1 = heap_comparison_ignore(current_area1)) > 0){
+ if((ignore1 = heap_comparison_ignore_size(current_area1)) > 0){
current_area2 = (char*)((xbt_mheap_t)s_heap)->heapbase + ((((char *)area2) + i) - (char *)heapbase2);
- if((ignore2 = heap_comparison_ignore(current_area2)) == ignore1){
+ if((ignore2 = heap_comparison_ignore_size(current_area2)) == ignore1){
i = i + ignore2;
ignore_done++;
continue;
if(add_heap_area_pair(previous, block_pointed1, -1, block_pointed2, -1)){
- if(ignore_done < xbt_dynar_length(mmalloc_ignore)){
- if(in_mmalloc_ignore(block_pointed1, -1))
- res_compare = compare_area(addr_block_pointed1, addr_block_pointed2, heapinfo1[block_pointed1].busy_block.busy_size, previous, 1);
- else
- res_compare = compare_area(addr_block_pointed1, addr_block_pointed2, heapinfo1[block_pointed1].busy_block.busy_size, previous, 0);
+ if((ignore_done < xbt_dynar_length(mc_heap_comparison_ignore)) && (heapinfo1[block_pointed1].busy_block.ignore == 1)){
+ res_compare = compare_area(addr_block_pointed1, addr_block_pointed2, heapinfo1[block_pointed1].busy_block.busy_size, previous, 1);
}else{
res_compare = compare_area(addr_block_pointed1, addr_block_pointed2, heapinfo1[block_pointed1].busy_block.busy_size, previous, 0);
}
- if(res_compare)
+ if(res_compare == 1)
return 1;
}
}else{ /* Fragmented block */
- /* Get pointed fragments number */
+ /* Get pointed fragments number */
frag_pointed1 = ((uintptr_t) (ADDR2UINT (address_pointed1) % (BLOCKSIZE))) >> heapinfo1[block_pointed1].type;
frag_pointed2 = ((uintptr_t) (ADDR2UINT (address_pointed2) % (BLOCKSIZE))) >> heapinfo2[block_pointed2].type;
if(heapinfo1[block_pointed1].busy_frag.frag_size[frag_pointed1] != heapinfo2[block_pointed2].busy_frag.frag_size[frag_pointed2]) /* Different size_used */
return 1;
-
- frag_size = 1 << heapinfo1[block_pointed1].type;
- addr_frag_pointed1 = (void*) ((char *)addr_block_pointed1 + (frag_pointed1 * frag_size));
- addr_frag_pointed2 = (void*) ((char *)addr_block_pointed2 + (frag_pointed2 * frag_size));
+ addr_frag_pointed1 = (void*) ((char *)addr_block_pointed1 + (frag_pointed1 << heapinfo1[block_pointed1].type));
+ addr_frag_pointed2 = (void*) ((char *)addr_block_pointed2 + (frag_pointed2 << heapinfo2[block_pointed2].type));
if(add_heap_area_pair(previous, block_pointed1, frag_pointed1, block_pointed2, frag_pointed2)){
- if(ignore_done < xbt_dynar_length(mmalloc_ignore)){
- if(in_mmalloc_ignore(block_pointed1, frag_pointed1))
+ if((ignore_done < xbt_dynar_length(mc_heap_comparison_ignore)) && (heapinfo1[block_pointed1].busy_frag.ignore[frag_pointed1] == 1)){
+ //if(in_mc_comparison_ignore(block_pointed1, frag_pointed1))
res_compare = compare_area(addr_frag_pointed1, addr_frag_pointed2, heapinfo1[block_pointed1].busy_frag.frag_size[frag_pointed1], previous, 1);
- else
- res_compare = compare_area(addr_frag_pointed1, addr_frag_pointed2, heapinfo1[block_pointed1].busy_frag.frag_size[frag_pointed1], previous, 0);
+ /*else
+ res_compare = compare_area(addr_frag_pointed1, addr_frag_pointed2, heapinfo1[block_pointed1].busy_frag.frag_size[frag_pointed1], previous, 0);*/
}else{
res_compare = compare_area(addr_frag_pointed1, addr_frag_pointed2, heapinfo1[block_pointed1].busy_frag.frag_size[frag_pointed1], previous, 0);
}
- if(res_compare)
+ if(res_compare == 1)
return 1;
}
frag_pointed1 = ((uintptr_t) (ADDR2UINT (address_pointed1) % (BLOCKSIZE))) >> heapinfo1[block_pointed1].type;
frag_pointed2 = ((uintptr_t) (ADDR2UINT (address_pointed2) % (BLOCKSIZE))) >> heapinfo2[block_pointed2].type;
- if(heapinfo1[block_pointed1].busy_frag.frag_size[frag_pointed1] != heapinfo2[block_pointed2].busy_frag.frag_size[frag_pointed2]) /* Different size_used */
+ if(heapinfo1[block_pointed1].busy_frag.frag_size[frag_pointed1] != heapinfo2[block_pointed2].busy_frag.frag_size[frag_pointed2]) /* Different size_used */
return 1;
-
- frag_size1 = 1 << heapinfo1[block_pointed1].type;
- frag_size2 = 1 << heapinfo1[block_pointed2].type;
- addr_frag_pointed1 = (void*) ((char *)addr_block_pointed1 + (frag_pointed1 * frag_size1));
- addr_frag_pointed2 = (void*) ((char *)addr_block_pointed2 + (frag_pointed2 * frag_size2));
+ addr_frag_pointed1 = (void*) ((char *)addr_block_pointed1 + (frag_pointed1 << heapinfo1[block_pointed1].type));
+ addr_frag_pointed2 = (void*) ((char *)addr_block_pointed2 + (frag_pointed2 << heapinfo2[block_pointed2].type));
if(add_heap_area_pair(previous, block_pointed1, frag_pointed1, block_pointed2, frag_pointed2)){
- if(ignore_done < xbt_dynar_length(mmalloc_ignore)){
- if(in_mmalloc_ignore(block_pointed1, frag_pointed1))
- res_compare = compare_area(addr_frag_pointed1, addr_frag_pointed2, heapinfo1[block_pointed1].busy_frag.frag_size[frag_pointed1], previous, 1);
- else
- res_compare = compare_area(addr_frag_pointed1, addr_frag_pointed2, heapinfo1[block_pointed1].busy_frag.frag_size[frag_pointed1], previous, 0);
+ if((ignore_done < xbt_dynar_length(mc_heap_comparison_ignore)) && (heapinfo1[block_pointed1].busy_frag.ignore[frag_pointed1] == 1)){
+ res_compare = compare_area(addr_frag_pointed1, addr_frag_pointed2, heapinfo1[block_pointed1].busy_frag.frag_size[frag_pointed1], previous, 1);
}else{
res_compare = compare_area(addr_frag_pointed1, addr_frag_pointed2, heapinfo1[block_pointed1].busy_frag.frag_size[frag_pointed1], previous, 0);
}
- if(res_compare)
+ if(res_compare == 1)
return 1;
}
return 1;
}
-static void match_equals(xbt_dynar_t list){
+static void match_equals(xbt_dynar_t list, xbt_dynar_t *equals){
unsigned int cursor = 0;
heap_area_pair_t current_pair;
+ heap_area_t previous_area;
+
+ void *real_addr_block1, *real_addr_block2, *real_addr_frag1, *real_addr_frag2;
xbt_dynar_foreach(list, cursor, current_pair){
+
if(current_pair->fragment1 != -1){
- heapinfo1[current_pair->block1].busy_frag.equal_to[current_pair->fragment1] = 1;
- heapinfo2[current_pair->block2].busy_frag.equal_to[current_pair->fragment2] = 1;
+
+ real_addr_block1 = ((void*) (((ADDR2UINT((size_t)current_pair->block1)) - 1) * BLOCKSIZE + (char*)((xbt_mheap_t)s_heap)->heapbase));
+ real_addr_frag1 = (void*) ((char *)real_addr_block1 + (current_pair->fragment1 << heapinfo1[current_pair->block1].type));
+ real_addr_block2 = ((void*) (((ADDR2UINT((size_t)current_pair->block2)) - 1) * BLOCKSIZE + (char*)((xbt_mheap_t)s_heap)->heapbase));
+ real_addr_frag2 = (void*) ((char *)real_addr_block2 + (current_pair->fragment2 << heapinfo2[current_pair->block2].type));
+
+ if(heapinfo1[current_pair->block1].busy_frag.equal_to[current_pair->fragment1] != NULL){
+ remove_heap_equality(equals, 1, real_addr_frag1);
+ previous_area = heapinfo1[current_pair->block1].busy_frag.equal_to[current_pair->fragment1];
+ xbt_free( heapinfo2[previous_area->block].busy_frag.equal_to[previous_area->fragment]);
+ heapinfo2[previous_area->block].busy_frag.equal_to[previous_area->fragment] = NULL;
+ xbt_free(heapinfo1[current_pair->block1].busy_frag.equal_to[current_pair->fragment1]);
+ }
+ if(heapinfo2[current_pair->block2].busy_frag.equal_to[current_pair->fragment2] != NULL){
+ remove_heap_equality(equals, 2, real_addr_frag2);
+ previous_area = heapinfo2[current_pair->block2].busy_frag.equal_to[current_pair->fragment2];
+ xbt_free(heapinfo1[previous_area->block].busy_frag.equal_to[previous_area->fragment]);
+ heapinfo1[previous_area->block].busy_frag.equal_to[previous_area->fragment] = NULL;
+ xbt_free(heapinfo2[current_pair->block2].busy_frag.equal_to[current_pair->fragment2]);
+ }
+
+ if(real_addr_frag1 != real_addr_frag2)
+ add_heap_equality(equals, real_addr_frag1, real_addr_frag2);
+
+ heapinfo1[current_pair->block1].busy_frag.equal_to[current_pair->fragment1] = new_heap_area(current_pair->block2, current_pair->fragment2);
+ heapinfo2[current_pair->block2].busy_frag.equal_to[current_pair->fragment2] = new_heap_area(current_pair->block1, current_pair->fragment1);
+
}else{
- heapinfo1[current_pair->block1].busy_block.equal_to = 1;
- heapinfo2[current_pair->block2].busy_block.equal_to = 1;
+
+ real_addr_block1 = ((void*) (((ADDR2UINT((size_t)current_pair->block1)) - 1) * BLOCKSIZE + (char*)((xbt_mheap_t)s_heap)->heapbase));
+ real_addr_block2 = ((void*) (((ADDR2UINT((size_t)current_pair->block2)) - 1) * BLOCKSIZE + (char*)((xbt_mheap_t)s_heap)->heapbase));
+
+ if(heapinfo1[current_pair->block1].busy_block.equal_to != NULL){
+ remove_heap_equality(equals, 1, real_addr_block1);
+ previous_area = heapinfo1[current_pair->block1].busy_block.equal_to;
+ xbt_free(heapinfo2[previous_area->block].busy_block.equal_to);
+ heapinfo2[previous_area->block].busy_block.equal_to = NULL;
+ xbt_free(heapinfo1[current_pair->block1].busy_block.equal_to);
+ }
+ if(heapinfo2[current_pair->block2].busy_block.equal_to != NULL){
+ remove_heap_equality(equals, 2, real_addr_block2);
+ previous_area = heapinfo2[current_pair->block2].busy_block.equal_to;
+ xbt_free(heapinfo1[previous_area->block].busy_block.equal_to);
+ heapinfo1[previous_area->block].busy_block.equal_to = NULL;
+ xbt_free(heapinfo2[current_pair->block2].busy_block.equal_to);
+ }
+
+ if(real_addr_block1 != real_addr_block2)
+ add_heap_equality(equals, real_addr_block1, real_addr_block2);
+
+ heapinfo1[current_pair->block1].busy_block.equal_to = new_heap_area(current_pair->block2, current_pair->fragment2);
+ heapinfo2[current_pair->block2].busy_block.equal_to = new_heap_area(current_pair->block1, current_pair->fragment1);
+
}
}
+
}
+#ifndef max
+#define max( a, b ) ( ((a) > (b)) ? (a) : (b) )
+#endif
+
+int mmalloc_linear_compare_heap(xbt_mheap_t heap1, xbt_mheap_t heap2){
+
+ if(heap1 == NULL && heap1 == NULL){
+ XBT_DEBUG("Malloc descriptors null");
+ return 0;
+ }
+
+ if(heap1->heaplimit != heap2->heaplimit){
+ XBT_DEBUG("Different limit of valid info table indices");
+ return 1;
+ }
+
+ /* Heap information */
+ heaplimit = ((struct mdesc *)heap1)->heaplimit;
+
+ s_heap = (char *)mmalloc_get_current_heap() - STD_HEAP_SIZE - getpagesize();
+
+ heapbase1 = (char *)heap1 + BLOCKSIZE;
+ heapbase2 = (char *)heap2 + BLOCKSIZE;
+
+ heapinfo1 = (malloc_info *)((char *)heap1 + ((uintptr_t)((char *)heap1->heapinfo - (char *)s_heap)));
+ heapinfo2 = (malloc_info *)((char *)heap2 + ((uintptr_t)((char *)heap2->heapinfo - (char *)s_heap)));
+
+ heapsize1 = heap1->heapsize;
+ heapsize2 = heap2->heapsize;
+
+ /* Start comparison */
+ size_t i, j, k;
+ void *addr_block1, *addr_block2, *addr_frag1, *addr_frag2;
+
+ int distance = 0;
+
+ /* Check busy blocks*/
+
+ i = 1;
+
+ while(i <= heaplimit){
+
+ addr_block1 = ((void*) (((ADDR2UINT(i)) - 1) * BLOCKSIZE + (char*)heapbase1));
+ addr_block2 = ((void*) (((ADDR2UINT(i)) - 1) * BLOCKSIZE + (char*)heapbase2));
+
+ if(heapinfo1[i].type != heapinfo2[i].type){
+
+ distance += BLOCKSIZE;
+ XBT_DEBUG("Different type of blocks (%zu) : %d - %d -> distance = %d", i, heapinfo1[i].type, heapinfo2[i].type, distance);
+ i++;
+
+ }else{
+
+ if(heapinfo1[i].type == -1){ /* Free block */
+ i++;
+ continue;
+ }
+
+ if(heapinfo1[i].type == 0){ /* Large block */
+
+ if(heapinfo1[i].busy_block.size != heapinfo2[i].busy_block.size){
+ distance += BLOCKSIZE * max(heapinfo1[i].busy_block.size, heapinfo2[i].busy_block.size);
+ i += max(heapinfo1[i].busy_block.size, heapinfo2[i].busy_block.size);
+ XBT_DEBUG("Different larger of cluster at block %zu : %zu - %zu -> distance = %d", i, heapinfo1[i].busy_block.size, heapinfo2[i].busy_block.size, distance);
+ continue;
+ }
+
+ /*if(heapinfo1[i].busy_block.busy_size != heapinfo2[i].busy_block.busy_size){
+ distance += max(heapinfo1[i].busy_block.busy_size, heapinfo2[i].busy_block.busy_size);
+ i += max(heapinfo1[i].busy_block.size, heapinfo2[i].busy_block.size);
+ 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);
+ continue;
+ }*/
+
+ k = 0;
+
+ //while(k < (heapinfo1[i].busy_block.busy_size)){
+ while(k < heapinfo1[i].busy_block.size * BLOCKSIZE){
+ if(memcmp((char *)addr_block1 + k, (char *)addr_block2 + k, 1) != 0){
+ distance ++;
+ }
+ k++;
+ }
+
+ i++;
+
+ }else { /* Fragmented block */
+
+ for(j=0; j < (size_t) (BLOCKSIZE >> heapinfo1[i].type); j++){
+
+ addr_frag1 = (void*) ((char *)addr_block1 + (j << heapinfo1[i].type));
+ addr_frag2 = (void*) ((char *)addr_block2 + (j << heapinfo2[i].type));
+
+ if(heapinfo1[i].busy_frag.frag_size[j] == 0 && heapinfo2[i].busy_frag.frag_size[j] == 0){
+ continue;
+ }
+
+
+ /*if(heapinfo1[i].busy_frag.frag_size[j] != heapinfo2[i].busy_frag.frag_size[j]){
+ distance += max(heapinfo1[i].busy_frag.frag_size[j], heapinfo2[i].busy_frag.frag_size[j]);
+ 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);
+ continue;
+ }*/
+
+ k=0;
+
+ //while(k < max(heapinfo1[i].busy_frag.frag_size[j], heapinfo2[i].busy_frag.frag_size[j])){
+ while(k < (BLOCKSIZE / (BLOCKSIZE >> heapinfo1[i].type))){
+ if(memcmp((char *)addr_frag1 + k, (char *)addr_frag2 + k, 1) != 0){
+ distance ++;
+ }
+ k++;
+ }
+
+ }
+
+ i++;
+
+ }
+
+ }
+
+ }
+
+ return distance;
+
+}
+
+static char * is_stack(void *address){
+ unsigned int cursor = 0;
+ stack_region_t stack;
+
+ xbt_dynar_foreach(stacks_areas, cursor, stack){
+ if(address == stack->address)
+ return stack->process_name;
+ }
+
+ return NULL;
+}
+
+static void add_heap_equality(xbt_dynar_t *equals, void *a1, void *a2){
+
+ if(xbt_dynar_is_empty(*equals)){
+
+ heap_equality_t he = xbt_new0(s_heap_equality_t, 1);
+ he->address1 = a1;
+ he->address2 = a2;
+
+ xbt_dynar_insert_at(*equals, 0, &he);
+
+ }else{
+
+ unsigned int cursor = 0;
+ int start = 0;
+ int end = xbt_dynar_length(*equals) - 1;
+ heap_equality_t current_equality = NULL;
+
+ while(start <= end){
+ cursor = (start + end) / 2;
+ current_equality = (heap_equality_t)xbt_dynar_get_as(*equals, cursor, heap_equality_t);
+ if(current_equality->address1 == a1){
+ if(current_equality->address2 == a2)
+ return;
+ if(current_equality->address2 < a2)
+ start = cursor + 1;
+ if(current_equality->address2 > a2)
+ end = cursor - 1;
+ }
+ if(current_equality->address1 < a1)
+ start = cursor + 1;
+ if(current_equality->address1 > a1)
+ end = cursor - 1;
+ }
+
+ heap_equality_t he = xbt_new0(s_heap_equality_t, 1);
+ he->address1 = a1;
+ he->address2 = a2;
+
+ if(current_equality->address1 < a1)
+ xbt_dynar_insert_at(*equals, cursor + 1 , &he);
+ else
+ xbt_dynar_insert_at(*equals, cursor, &he);
+
+ }
+
+}
+
+static void remove_heap_equality(xbt_dynar_t *equals, int address, void *a){
+
+ unsigned int cursor = 0;
+ heap_equality_t current_equality;
+ int found = 0;
+
+ if(address == 1){
+
+ int start = 0;
+ int end = xbt_dynar_length(*equals) - 1;
+
+
+ while(start <= end && found == 0){
+ cursor = (start + end) / 2;
+ current_equality = (heap_equality_t)xbt_dynar_get_as(*equals, cursor, heap_equality_t);
+ if(current_equality->address1 == a)
+ found = 1;
+ if(current_equality->address1 < a)
+ start = cursor + 1;
+ if(current_equality->address1 > a)
+ end = cursor - 1;
+ }
+
+ if(found == 1)
+ xbt_dynar_remove_at(*equals, cursor, NULL);
+
+ }else{
+
+ xbt_dynar_foreach(*equals, cursor, current_equality){
+ if(current_equality->address2 == a){
+ found = 1;
+ break;
+ }
+ }
+
+ if(found == 1)
+ xbt_dynar_remove_at(*equals, cursor, NULL);
+
+ }
+
+
+}
+
+int is_free_area(void *area, xbt_mheap_t heap){
+
+ void *sheap = (char *)mmalloc_get_current_heap() - STD_HEAP_SIZE - getpagesize();
+ malloc_info *heapinfo = (malloc_info *)((char *)heap + ((uintptr_t)((char *)heap->heapinfo - (char *)sheap)));
+ size_t heapsize = heap->heapsize;
+
+ /* Get block number */
+ size_t block = ((char*)area - (char*)((xbt_mheap_t)sheap)->heapbase) / BLOCKSIZE + 1;
+ size_t fragment;
+
+ /* Check if valid block number */
+ if((char *)area < (char*)((xbt_mheap_t)sheap)->heapbase || block > heapsize || block < 1)
+ return 0;
+
+ if(heapinfo[block].type < 0)
+ return 1;
+
+ if(heapinfo[block].type == 0)
+ return 0;
+
+ if(heapinfo[block].type > 0){
+ fragment = ((uintptr_t) (ADDR2UINT(area) % (BLOCKSIZE))) >> heapinfo[block].type;
+ if(heapinfo[block].busy_frag.frag_size[fragment] == 0)
+ return 1;
+ }
+
+ return 0;
+
+
+
+}
