X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/4bcadecc3433af21a252c837673a4949c50d4e32..8b5a3bd2ffa7cff8ae4b0d67cac8c49a22bc673e:/src/xbt/mmalloc/mm_diff.c

diff --git a/src/xbt/mmalloc/mm_diff.c b/src/xbt/mmalloc/mm_diff.c
index 1fd0770f50..42112bdaba 100644
--- a/src/xbt/mmalloc/mm_diff.c
+++ b/src/xbt/mmalloc/mm_diff.c
@@ -7,6 +7,7 @@
 
 #include "xbt/ex_interface.h" /* internals of backtrace setup */
 #include "xbt/str.h"
+#include "mc/mc.h"
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mm_diff, xbt,
                                 "Logging specific to mm_diff in mmalloc");
@@ -112,20 +113,20 @@ void mmalloc_backtrace_fragment_display(xbt_mheap_t mdp, size_t block, size_t fr
   }
 }
 
-int mmalloc_compare_heap(xbt_mheap_t mdp1, xbt_mheap_t mdp2, void* s_heap, void* r_heap){
+int mmalloc_compare_heap(xbt_mheap_t mdp1, xbt_mheap_t mdp2){
 
   if(mdp1 == NULL && mdp2 == NULL){
     fprintf(stderr, "Malloc descriptors null\n");
     return 0;
   }
 
-  int errors = mmalloc_compare_mdesc(mdp1, mdp2, s_heap, r_heap);
+  int errors = mmalloc_compare_mdesc(mdp1, mdp2);
 
   return (errors > 0);
 
 }
 
-int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void* s_heap, void* r_heap){
+int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2){
 
   int errors = 0;
 
@@ -194,20 +195,21 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void* s_heap,
     return 1;
     }*/
 
-  void* heapbase1 = (char *)mdp1 + ((char *)mdp1->heapbase - (char *)s_heap);
-  void* heapbase2 = (char *)mdp2 + ((char *)mdp2->heapbase - (char *)s_heap);
+
+  void* s_heap = (char *)mmalloc_get_current_heap() - STD_HEAP_SIZE - getpagesize();
     
+  void *heapbase1 = (char *)mdp1 + BLOCKSIZE;
+  void *heapbase2 = (char *)mdp2 + BLOCKSIZE;
+
   size_t i, j;
   void *addr_block1, *addr_block2, *addr_frag1, *addr_frag2;
   size_t frag_size = 0;         /* FIXME: arbitrary initialization */
-  /* size_t frag_size_pointed; FIXME: unused */
 
   i = 1;
 
   int k;
   int distance = 0;
-
-  void *end_heap = get_end_addr_heap(s_heap);
+  int total_distance = 0;
 
   int pointer_align;
   void *address_pointed1, *address_pointed2;
@@ -216,7 +218,6 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void* s_heap,
   void *addr_block_pointed1, *addr_block_pointed2;
   int frag_pointed1, frag_pointed2;
 
-
   /* Check busy blocks*/
 
   while(i < mdp1->heaplimit){
@@ -226,12 +227,9 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void* s_heap,
       errors++;
     }
 
-    //fprintf(stderr, "i = %zu, type = %d", i, mdp1->heapinfo[i].type);
-
-    addr_block1 = (void*) (((ADDR2UINT(i)) - 1) * BLOCKSIZE + (char*)heapbase1);
-    addr_block2 = (void*) (((ADDR2UINT(1)) - 1) * BLOCKSIZE + (char*)heapbase2);
+    addr_block1 = (char*)heapbase1 + ((i-1)*BLOCKSIZE);
+    addr_block2 = (char*)heapbase2 + ((i-1)*BLOCKSIZE);
 
-   
     if(mdp1->heapinfo[i].type == 0){ /* busy large block */
 
       if(mdp1->heapinfo[i].busy_block.size != mdp2->heapinfo[i].busy_block.size){
@@ -246,86 +244,87 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void* s_heap,
 	errors++;
       } 
 
-      //if(memcmp(addr_block1, addr_block2, (mdp1->heapinfo[i].busy_block.size * BLOCKSIZE)) != 0){
-      if(memcmp(addr_block1, addr_block2, (mdp1->heapinfo[i].busy_block.busy_size)) != 0){
-
-	/* Hamming distance on different blocks */
-	distance = 0;
-	//for(k=0;k<mdp1->heapinfo[i].busy_block.size * BLOCKSIZE;k++){
-	for(k=0;k<mdp1->heapinfo[i].busy_block.busy_size;k++){
-	  if(memcmp(((char *)addr_block1) + k, ((char *)addr_block2) + k, 1) != 0){
-	    //fprintf(stderr, "Different byte (offset=%d) (%p - %p) in block %zu\n", k, (char *)addr_block1 + k, (char *)addr_block2 + k, i); fflush(NULL);
-	    pointer_align = (k / sizeof(void*)) * sizeof(void*); 
-	    address_pointed1 = *((void **)((char *)addr_block1 + pointer_align));
-	    address_pointed2 = *((void **)((char *)addr_block2 + pointer_align));				   
-	    if(((address_pointed1 > s_heap) && (address_pointed1 < end_heap)) && ((address_pointed2 > s_heap) && (address_pointed2 < end_heap))){
-	      block_pointed1 = ((char*)address_pointed1 - (char*)((struct mdesc*)s_heap)->heapbase) / BLOCKSIZE + 1;
-	      block_pointed2 = ((char*)address_pointed2 - (char*)((struct mdesc*)s_heap)->heapbase) / BLOCKSIZE + 1;
-	      //fprintf(stderr, "Blocks pointed : %d - %d\n", block_pointed1, block_pointed2);
-	      if(mdp1->heapinfo[block_pointed1].type == mdp2->heapinfo[block_pointed2].type){
-		if(mdp1->heapinfo[block_pointed1].type == 0){ // Large block
-		  while(mdp1->heapinfo[block_pointed1].busy_block.size == 0)
-		    block_pointed1--;
-		  while(mdp2->heapinfo[block_pointed2].busy_block.size == 0)
-		    block_pointed2--;
-		  if(mdp1->heapinfo[block_pointed1].busy_block.busy_size == mdp2->heapinfo[block_pointed2].busy_block.busy_size){
-		    addr_block_pointed1 = (void*) (((ADDR2UINT((size_t)block_pointed1)) - 1) * BLOCKSIZE + (char*)heapbase1);
-		    addr_block_pointed2 = (void*) (((ADDR2UINT((size_t)block_pointed2)) - 1) * BLOCKSIZE + (char*)heapbase2);
-		    fprintf(stderr, "Memcmp between blocks %d and %d (size = %zu)\n", block_pointed1, block_pointed2,  mdp1->heapinfo[block_pointed1].busy_block.busy_size); 
-		    if(memcmp(addr_block_pointed1, addr_block_pointed2, mdp1->heapinfo[block_pointed1].busy_block.busy_size) != 0){
-		      distance++;
-		    }else{
-		      fprintf(stderr, "False difference detected\n");
-		    }
-		  }else{
+  
+      /* Hamming distance on different blocks */
+      distance = 0;
+
+      //for(k=0;k<mdp1->heapinfo[i].busy_block.size * BLOCKSIZE;k++){
+      for(k=0;k<mdp1->heapinfo[i].busy_block.busy_size;k++){
+	if(memcmp(((char *)addr_block1) + k, ((char *)addr_block2) + k, 1) != 0){
+	  //fprintf(stderr, "Different byte (offset=%d) (%p - %p) in block %zu\n", k, (char *)addr_block1 + k, (char *)addr_block2 + k, i); fflush(NULL);
+	  pointer_align = (k / sizeof(void*)) * sizeof(void*); 
+	  address_pointed1 = *((void **)((char *)addr_block1 + pointer_align));
+	  address_pointed2 = *((void **)((char *)addr_block2 + pointer_align));				   
+	  if(((address_pointed1 > (void *)s_heap) && (address_pointed1 < mdp1->breakval)) && ((address_pointed2 > (void *)s_heap) && (address_pointed2 < mdp2->breakval))){
+	    block_pointed1 = ((char*)address_pointed1 - (char*)((struct mdesc*)s_heap)->heapbase) / BLOCKSIZE + 1;
+	    block_pointed2 = ((char*)address_pointed2 - (char*)((struct mdesc*)s_heap)->heapbase) / BLOCKSIZE + 1;
+	    //fprintf(stderr, "Blocks pointed : %d - %d\n", block_pointed1, block_pointed2);
+	    if(mdp1->heapinfo[block_pointed1].type == mdp2->heapinfo[block_pointed2].type){
+	      if(mdp1->heapinfo[block_pointed1].type == 0){ // Large block
+		while(mdp1->heapinfo[block_pointed1].busy_block.size == 0)
+		  block_pointed1--;
+		while(mdp2->heapinfo[block_pointed2].busy_block.size == 0)
+		  block_pointed2--;
+		if(mdp1->heapinfo[block_pointed1].busy_block.busy_size == mdp2->heapinfo[block_pointed2].busy_block.busy_size){
+		  addr_block_pointed1 = (char*)heapbase1 + ((block_pointed1 - 1)*BLOCKSIZE);
+		  addr_block_pointed2 = (char*)heapbase2 + ((block_pointed2 - 1)*BLOCKSIZE);
+		  
+		  fprintf(stderr, "Memcmp between blocks %d and %d (size = %zu)\n", block_pointed1, block_pointed2,  mdp1->heapinfo[block_pointed1].busy_block.busy_size); 
+		  if(memcmp(addr_block_pointed1, addr_block_pointed2, mdp1->heapinfo[block_pointed1].busy_block.busy_size) != 0){
 		    distance++;
+		  }else{
+		    fprintf(stderr, "False difference detected\n");
 		  }
-		}else{ // Fragmented block
-		  /* frag_size_pointed = pow(2, mdp1->heapinfo[block_pointed1].type); FIXME: unused*/
-		  address_pointed1 = (char*)mdp1 + ((char*)address_pointed1 - (char*)s_heap);
-		  address_pointed2 = (char*)mdp2 + ((char*)address_pointed2 - (char*)s_heap);
-		  addr_block_pointed1 = (void*) (((ADDR2UINT((size_t)block_pointed1)) - 1) * BLOCKSIZE + (char*)heapbase1);
-		  addr_block_pointed2 = (void*) (((ADDR2UINT((size_t)block_pointed2)) - 1) * BLOCKSIZE + (char*)heapbase2);
-		  frag_pointed1 = 1;
-		  while(address_pointed1 > (void*)((char*)addr_block_pointed1 + (frag_pointed1 * frag_size))){
-		    frag_pointed1++;
-		  }
-		  frag_pointed2 = 1;
-		  while(address_pointed2 > (void*)((char*)addr_block_pointed2 + (frag_pointed2 * frag_size))){
-		    frag_pointed2++;
-		  }
-		  if(mdp1->heapinfo[block_pointed1].busy_frag.frag_size[frag_pointed1] == mdp2->heapinfo[block_pointed2].busy_frag.frag_size[frag_pointed2]){
-		    fprintf(stderr, "Memcmp between fragments %d (block %d) and %d (block %d) (size = %d)\n", frag_pointed1, block_pointed1, frag_pointed2, block_pointed2,  mdp1->heapinfo[block_pointed1].busy_frag.frag_size[frag_pointed1]); 
-		    if(memcmp((char*)addr_block_pointed1 + (frag_pointed1 * frag_size), (char*)addr_block_pointed2 + (frag_pointed2 * frag_size), mdp1->heapinfo[block_pointed1].busy_frag.frag_size[frag_pointed1]) != 0){
-		      distance++;
-		    }else{
-		      fprintf(stderr, "False difference detected\n");
-		    }
+		}else{
+		  distance++;
+		}
+	      }else{ // Fragmented block
+		address_pointed1 = (char*)mdp1 + ((char*)address_pointed1 - (char*)s_heap);
+		address_pointed2 = (char*)mdp2 + ((char*)address_pointed2 - (char*)s_heap);
+		addr_block_pointed1 = (char*)heapbase1 + ((block_pointed1 - 1)*BLOCKSIZE);
+		addr_block_pointed2 = (char*)heapbase2 + ((block_pointed2 - 1)*BLOCKSIZE);
+		frag_pointed1 = 0;
+		while(address_pointed1 > (void*)((char*)addr_block_pointed1 + ((frag_pointed1 +1 ) * frag_size))){
+		  frag_pointed1++;
+		}
+		frag_pointed2 = 0;
+		while(address_pointed2 > (void*)((char*)addr_block_pointed2 + ((frag_pointed2 +1) * frag_size))){
+		  frag_pointed2++;
+		}
+		if(mdp1->heapinfo[block_pointed1].busy_frag.frag_size[frag_pointed1] == mdp2->heapinfo[block_pointed2].busy_frag.frag_size[frag_pointed2]){
+		  fprintf(stderr, "Memcmp between fragments %d (block %d) and %d (block %d) (size = %d)\n", frag_pointed1, block_pointed1, frag_pointed2, block_pointed2,  mdp1->heapinfo[block_pointed1].busy_frag.frag_size[frag_pointed1]); 
+		  if(memcmp((char*)addr_block_pointed1 + (frag_pointed1 * frag_size), (char*)addr_block_pointed2 + (frag_pointed2 * frag_size), mdp1->heapinfo[block_pointed1].busy_frag.frag_size[frag_pointed1]) != 0){
+		    distance++;
 		  }else{
-		    distance ++;
+		    fprintf(stderr, "False difference detected\n");
 		  }
+		}else{
+		  distance ++;
+		}
 		  
 		  
-		}
-	      }else{
-		distance++;
 	      }
 	    }else{
 	      distance++;
 	    }
-	    
+	  }else{
+	    distance++;
 	  }
+	    
 	}
+      }
 
-	if(distance>0){
-	  fprintf(stderr,"\nDifferent data in large block %zu (size = %zu (in blocks), busy_size = %zu (in bytes))\n", i, mdp1->heapinfo[i].busy_block.size, mdp1->heapinfo[i].busy_block.busy_size);
-	  fflush(NULL);
-	  fprintf(stderr, "Hamming distance between blocks : %d\n", distance);
-	  mmalloc_backtrace_block_display(mdp1, i);
-	  mmalloc_backtrace_block_display(mdp2, i);
-	  errors++; 
-	}
+
+      if(distance>0){
+	fprintf(stderr,"\nDifferent data in large block %zu (size = %zu (in blocks), busy_size = %zu (in bytes))\n", i, mdp1->heapinfo[i].busy_block.size, mdp1->heapinfo[i].busy_block.busy_size);
+	fflush(NULL);
+	fprintf(stderr, "Hamming distance between blocks : %d\n", distance);
+	mmalloc_backtrace_block_display(mdp1, i);
+	mmalloc_backtrace_block_display(mdp2, i);
+	errors++; 
+	total_distance += distance;
       }
+    
       
       i++;
       
@@ -348,8 +347,6 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void* s_heap,
 	  errors++;
 	} 
 
-	//fprintf(stderr,"\n");
-
 	frag_size = pow(2, mdp1->heapinfo[i].type);
 
 	for(j=0; j< (BLOCKSIZE/frag_size); j++){
@@ -364,83 +361,80 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void* s_heap,
 	    addr_frag1 = (char *)addr_block1 + (j * frag_size);
 	    addr_frag2 = (char *)addr_block2 + (j * frag_size);
 
-	    //if(memcmp(addr_frag1, addr_frag2, frag_size) != 0){
-	    if(memcmp(addr_frag1, addr_frag2, mdp1->heapinfo[i].busy_frag.frag_size[j]) != 0){
-	      /* Hamming distance on different blocks */
-	      distance = 0;
-	      //for(k=0;k<frag_size;k++){
-	      for(k=0;k<mdp1->heapinfo[i].busy_frag.frag_size[j];k++){
-		if(memcmp(((char *)addr_frag1) + k, ((char *)addr_frag2) + k, 1) != 0){
-		  //fprintf(stderr, "Different byte (offset=%d) (%p - %p) in fragment %zu in block %zu\n", k, (char *)addr_frag1 + k, (char *)addr_frag2 + k, j, i); fflush(NULL);
-		  pointer_align = (k / sizeof(void*)) * sizeof(void*);
-		  address_pointed1 = *((void **)((char *)addr_frag1 + pointer_align));
-		  address_pointed2 = *((void **)((char *)addr_frag2 + pointer_align));				   
-		  if(((address_pointed1 > s_heap) && (address_pointed1 < end_heap)) && ((address_pointed2 > s_heap) && (address_pointed2 < end_heap))){
-		    block_pointed1 = ((char*)address_pointed1 - (char*)((struct mdesc*)s_heap)->heapbase) / BLOCKSIZE + 1;
-		    block_pointed2 = ((char*)address_pointed2 - (char*)((struct mdesc*)s_heap)->heapbase) / BLOCKSIZE + 1;
-		    //fprintf(stderr, "Blocks pointed : %d - %d\n", block_pointed1, block_pointed2);
-		    if(mdp1->heapinfo[block_pointed1].type == mdp2->heapinfo[block_pointed2].type){
-		      if(mdp1->heapinfo[block_pointed1].type == 0){ // Large block
-			while(mdp1->heapinfo[block_pointed1].busy_block.size == 0)
-			  block_pointed1--;
-			while(mdp2->heapinfo[block_pointed2].busy_block.size == 0)
-			  block_pointed2--;
-			if(mdp1->heapinfo[block_pointed1].busy_block.busy_size == mdp2->heapinfo[block_pointed2].busy_block.busy_size){
-			  addr_block_pointed1 = (void*) (((ADDR2UINT((size_t)block_pointed1)) - 1) * BLOCKSIZE + (char*)heapbase1);
-			  addr_block_pointed2 = (void*) (((ADDR2UINT((size_t)block_pointed2)) - 1) * BLOCKSIZE + (char*)heapbase2);
-			  fprintf(stderr, "Memcmp between blocks %d and %d (size = %zu)\n", block_pointed1, block_pointed2,  mdp1->heapinfo[block_pointed1].busy_block.busy_size); 
-			  if(memcmp(addr_block_pointed1, addr_block_pointed2, mdp1->heapinfo[block_pointed1].busy_block.busy_size) != 0){
-			    distance++;
-			  }else{
-			    fprintf(stderr, "False difference detected\n");
-			  }
-			}else{
+
+	    /* Hamming distance on different blocks */
+	    distance = 0;
+	    //for(k=0;k<frag_size;k++){
+	    for(k=0;k<mdp1->heapinfo[i].busy_frag.frag_size[j];k++){
+	      if(memcmp(((char *)addr_frag1) + k, ((char *)addr_frag2) + k, 1) != 0){
+		//fprintf(stderr, "Different byte (offset=%d) (%p - %p) in fragment %zu in block %zu\n", k, (char *)addr_frag1 + k, (char *)addr_frag2 + k, j, i); fflush(NULL);
+		pointer_align = (k / sizeof(void*)) * sizeof(void*);
+		address_pointed1 = *((void **)((char *)addr_frag1 + pointer_align));
+		address_pointed2 = *((void **)((char *)addr_frag2 + pointer_align));				   
+		if(((address_pointed1 > (void *)s_heap) && (address_pointed1 < mdp1->breakval)) && ((address_pointed2 > (void *)s_heap) && (address_pointed2 < mdp2->breakval))){
+		  block_pointed1 = ((char*)address_pointed1 - (char*)((struct mdesc*)s_heap)->heapbase) / BLOCKSIZE + 1;
+		  block_pointed2 = ((char*)address_pointed2 - (char*)((struct mdesc*)s_heap)->heapbase) / BLOCKSIZE + 1;
+		  //fprintf(stderr, "Blocks pointed : %d - %d\n", block_pointed1, block_pointed2);
+		  if(mdp1->heapinfo[block_pointed1].type == mdp2->heapinfo[block_pointed2].type){
+		    if(mdp1->heapinfo[block_pointed1].type == 0){ // Large block
+		      while(mdp1->heapinfo[block_pointed1].busy_block.size == 0)
+			block_pointed1--;
+		      while(mdp2->heapinfo[block_pointed2].busy_block.size == 0)
+			block_pointed2--;
+		      if(mdp1->heapinfo[block_pointed1].busy_block.busy_size == mdp2->heapinfo[block_pointed2].busy_block.busy_size){
+			addr_block_pointed1 = (char*)heapbase1 + ((block_pointed1 - 1)*BLOCKSIZE);
+			addr_block_pointed2 = (char*)heapbase2 + ((block_pointed2 - 1)*BLOCKSIZE);
+			fprintf(stderr, "Memcmp between blocks %d and %d (size = %zu)\n", block_pointed1, block_pointed2,  mdp1->heapinfo[block_pointed1].busy_block.busy_size); 
+			if(memcmp(addr_block_pointed1, addr_block_pointed2, mdp1->heapinfo[block_pointed1].busy_block.busy_size) != 0){
 			  distance++;
+			}else{
+			  fprintf(stderr, "False difference detected\n");
 			}
-		      }else{ // Fragmented block
-			/* frag_size_pointed = pow(2, mdp1->heapinfo[block_pointed1].type); FIXME: unused */
-			address_pointed1 = (char*)mdp1 + ((char*)address_pointed1 - (char*)s_heap);
-			address_pointed2 = (char*)mdp2 + ((char*)address_pointed2 - (char*)s_heap);
-			addr_block_pointed1 = (void*) (((ADDR2UINT((size_t)block_pointed1)) - 1) * BLOCKSIZE + (char*)heapbase1);
-			addr_block_pointed2 = (void*) (((ADDR2UINT((size_t)block_pointed2)) - 1) * BLOCKSIZE + (char*)heapbase2);
-			frag_pointed1 = 1;
-			while(address_pointed1 > (void*)((char*)addr_block_pointed1 + (frag_pointed1 * frag_size))){
-			  frag_pointed1++;
-			}
-			frag_pointed2 = 1;
-			while(address_pointed2 > (void*)((char*)addr_block_pointed2 + (frag_pointed2 * frag_size))){
-			  frag_pointed2++;
-			}
-			if(mdp1->heapinfo[block_pointed1].busy_frag.frag_size[frag_pointed1] == mdp2->heapinfo[block_pointed2].busy_frag.frag_size[frag_pointed2]){
-			   fprintf(stderr, "Memcmp between fragments %d (block %d) and %d (block %d) (size = %d)\n", frag_pointed1, block_pointed1, frag_pointed2, block_pointed2,  mdp1->heapinfo[block_pointed1].busy_frag.frag_size[frag_pointed1]); 
-			  if(memcmp((char*)addr_block_pointed1 + (frag_pointed1 * frag_size), (char*)addr_block_pointed2 + (frag_pointed2 * frag_size), mdp1->heapinfo[block_pointed1].busy_frag.frag_size[frag_pointed1]) != 0){
-			    distance++;
-			  }else{
-			    fprintf(stderr, "False difference detected\n");
-			  }
+		      }else{
+			distance++;
+		      }
+		    }else{ // Fragmented block
+		      address_pointed1 = (char*)mdp1 + ((char*)address_pointed1 - (char*)s_heap);
+		      address_pointed2 = (char*)mdp2 + ((char*)address_pointed2 - (char*)s_heap);
+		      addr_block_pointed1 = (char*)heapbase1 + ((block_pointed1 - 1)*BLOCKSIZE);
+		      addr_block_pointed2 = (char*)heapbase2 + ((block_pointed2 - 1)*BLOCKSIZE);
+		      frag_pointed1 = 0;
+		      while(address_pointed1 > (void*)((char*)addr_block_pointed1 + ((frag_pointed1 + 1) * frag_size))){
+			frag_pointed1++;
+		      }
+		      frag_pointed2 = 0;
+		      while(address_pointed2 > (void*)((char*)addr_block_pointed2 + ((frag_pointed2 + 1) * frag_size))){
+			frag_pointed2++;
+		      }
+		      if(mdp1->heapinfo[block_pointed1].busy_frag.frag_size[frag_pointed1] == mdp2->heapinfo[block_pointed2].busy_frag.frag_size[frag_pointed2]){
+			fprintf(stderr, "Memcmp between fragments %d (block %d) and %d (block %d) (size = %d)\n", frag_pointed1, block_pointed1, frag_pointed2, block_pointed2,  mdp1->heapinfo[block_pointed1].busy_frag.frag_size[frag_pointed1]); 
+			if(memcmp((char*)addr_block_pointed1 + (frag_pointed1 * frag_size), (char*)addr_block_pointed2 + (frag_pointed2 * frag_size), mdp1->heapinfo[block_pointed1].busy_frag.frag_size[frag_pointed1]) != 0){
+			  distance++;
 			}else{
-			  distance ++;
+			  fprintf(stderr, "False difference detected\n");
 			}
+		      }else{
+			distance ++;
 		      }
-		    }else{
-		      distance++;
 		    }
 		  }else{
 		    distance++;
 		  }
+		}else{
+		  distance++;
 		}
 	      }
 
-	      if(distance > 0){
-		fprintf(stderr,"\nDifferent data in fragment %zu (size = %zu, size used = %hu) in block %zu \n", j, frag_size, mdp1->heapinfo[i].busy_frag.frag_size[j], i);
-		fprintf(stderr, "Hamming distance between fragments : %d\n", distance);
-		mmalloc_backtrace_fragment_display(mdp1, i, j);
-		mmalloc_backtrace_fragment_display(mdp2, i, j);
-		errors++;
-		
-	      }
-
-	     
+	    }
+	    
+	    if(distance > 0){
+	      fprintf(stderr,"\nDifferent data in fragment %zu (size = %zu, size used = %hu) in block %zu \n", j, frag_size, mdp1->heapinfo[i].busy_frag.frag_size[j], i);
+	      fprintf(stderr, "Hamming distance between fragments : %d\n", distance);
+	      mmalloc_backtrace_fragment_display(mdp1, i, j);
+	      mmalloc_backtrace_fragment_display(mdp2, i, j);
+	      errors++;
+	      total_distance += distance;
+	      
 	    }
 
 	  }
@@ -452,71 +446,69 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void* s_heap,
 
 	i++;
 
-	//fprintf(stderr,"\n");
-
       }
       
     }
 
   }
 
-  //free(pointed_address1);
-  //free(pointed_address2);
+
+  fprintf(stderr, "Hamming distance between heap regions : %d\n", total_distance);
 
   return (errors);
 }
 
 
-void *get_end_addr_heap(void *s_heap){
+/* void *get_end_addr_heap(void *heap){ */
 
-  FILE *fp;                     /* File pointer to process's proc maps file */
-  char *line = NULL;            /* Temporal storage for each line that is readed */
-  ssize_t read;                 /* Number of bytes readed */
-  size_t n = 0;                 /* Amount of bytes to read by getline */
+/*   FILE *fp;                     /\* File pointer to process's proc maps file *\/ */
+/*   char *line = NULL;            /\* Temporal storage for each line that is readed *\/ */
+/*   ssize_t read;                 /\* Number of bytes readed *\/ */
+/*   size_t n = 0;                 /\* Amount of bytes to read by getline *\/ */
 
-  fp = fopen("/proc/self/maps", "r");
+/*   fp = fopen("/proc/self/maps", "r"); */
   
-  if(fp == NULL)
-    perror("fopen failed");
+/*   if(fp == NULL) */
+/*     perror("fopen failed"); */
 
 
-  xbt_dynar_t lfields = NULL;
-  xbt_dynar_t start_end  = NULL;
-  void *start_addr;
-  void *end_addr;
+/*   xbt_dynar_t lfields = NULL; */
+/*   xbt_dynar_t start_end  = NULL; */
+/*   void *start_addr; */
+/*   void *end_addr; */
 
-  while ((read = getline(&line, &n, fp)) != -1) {
+/*   while ((read = getline(&line, &n, fp)) != -1) { */
 
-    xbt_str_trim(line, NULL);
-    xbt_str_strip_spaces(line);
-    lfields = xbt_str_split(line,NULL);
+/*     xbt_str_trim(line, NULL); */
+/*     xbt_str_strip_spaces(line); */
+/*     lfields = xbt_str_split(line,NULL); */
 
-    start_end = xbt_str_split(xbt_dynar_get_as(lfields, 0, char*), "-");
-    start_addr = (void *) strtoul(xbt_dynar_get_as(start_end, 0, char*), NULL, 16);
-    end_addr = (void *) strtoul(xbt_dynar_get_as(start_end, 1, char*), NULL, 16);
+/*     start_end = xbt_str_split(xbt_dynar_get_as(lfields, 0, char*), "-"); */
+/*     start_addr = (void *) strtoul(xbt_dynar_get_as(start_end, 0, char*), NULL, 16); */
+/*     end_addr = (void *) strtoul(xbt_dynar_get_as(start_end, 1, char*), NULL, 16); */
 
-    if(start_addr == s_heap){
-      free(line);
-      fclose(fp);
-      xbt_dynar_reset(lfields);
-      xbt_free(lfields);
-      xbt_dynar_reset(start_end);
-      xbt_free(start_end);
-      return end_addr;
-    }
+/*     if(start_addr == heap){ */
+/*       free(line); */
+/*       fclose(fp); */
+/*       xbt_dynar_reset(lfields); */
+/*       xbt_free(lfields); */
+/*       xbt_dynar_reset(start_end); */
+/*       xbt_free(start_end); */
+/*       return end_addr; */
+/*     } */
 
-  }
+/*   } */
 
-  xbt_dynar_reset(lfields);
-  xbt_free(lfields);
-  xbt_dynar_reset(start_end);
-  xbt_free(start_end);
-  free(line);
-  fclose(fp);
-  return NULL;
+/*   xbt_dynar_reset(lfields); */
+/*   xbt_free(lfields); */
+/*   xbt_dynar_reset(start_end); */
+/*   xbt_free(start_end); */
+/*   free(line); */
+/*   fclose(fp); */
+/*   return NULL; */
 
 
-}
+/* } */
 
 
 void mmalloc_display_info_heap(xbt_mheap_t h){