X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/d358846b95536506ea8472fee71941577848dd8a..d34cb01da6a26cc35b4cd0cce1c8c3a62094e894:/src/xbt/mmalloc/mm_diff.c

diff --git a/src/xbt/mmalloc/mm_diff.c b/src/xbt/mmalloc/mm_diff.c
index 473311b8b2..a2e29b6f6d 100644
--- a/src/xbt/mmalloc/mm_diff.c
+++ b/src/xbt/mmalloc/mm_diff.c
@@ -88,24 +88,47 @@ void mmalloc_backtrace_block_display(xbt_mheap_t mdp, size_t block){
   }
 }
 
-int mmalloc_compare_heap(xbt_mheap_t mdp1, xbt_mheap_t mdp2){
+void mmalloc_backtrace_fragment_display(xbt_mheap_t mdp, size_t block, size_t frag){
+  
+  xbt_ex_t e;
+
+  memcpy(&e.bt,&(mdp->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) {
+    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 fragment %zu in block %zu where 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",i);fflush(NULL);
+      fprintf(stderr, "---> %s\n", e.bt_strings[i] + 4);
+    }
+  }
+}
+
+int mmalloc_compare_heap(xbt_mheap_t mdp1, xbt_mheap_t mdp2, void* s_heap, void* r_heap){
 
   if(mdp1 == NULL && mdp2 == NULL){
-    XBT_DEBUG("Malloc descriptors null\n");
+    fprintf(stderr, "Malloc descriptors null\n");
     return 0;
   }
 
-  int errors = mmalloc_compare_mdesc(mdp1, mdp2);
+  int errors = mmalloc_compare_mdesc(mdp1, mdp2, s_heap, r_heap);
 
   return (errors > 0);
 
 }
 
-int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2){
+int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void* s_heap, void* r_heap){
 
   int errors = 0;
 
-  if(mdp1->headersize != mdp2->headersize){
+  /*if(mdp1->headersize != mdp2->headersize){
     fprintf(stderr, "Different size of the file header for the mapped files\n");
     return 1;
   }
@@ -128,21 +151,18 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2){
   if(mdp1->heapsize != mdp2->heapsize){
     fprintf(stderr,"Different number of info entries\n");
     return 1;
-  }
-  
+  }  
 
   if(mdp1->heapbase != mdp2->heapbase){
     fprintf(stderr,"Different first block of the heap\n");
     return 1;
   }
 
-
   if(mdp1->heapindex != mdp2->heapindex){
     fprintf(stderr,"Different index for the heap table : %zu - %zu\n", mdp1->heapindex, mdp2->heapindex);
     return 1;
   }
 
-
   if(mdp1->base != mdp2->base){
     fprintf(stderr,"Different base address of the memory region\n");
     return 1;
@@ -171,7 +191,7 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2){
   if(mdp1->version != mdp2->version){
     fprintf(stderr,"Different version of the mmalloc package\n");
     return 1;
-  }
+    }*/
 
 
   size_t i, j;
@@ -180,6 +200,10 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2){
 
   i = 0;
 
+  int k;
+  int distance = 0;
+  int pointer_align;
+
   /* Check busy blocks*/
 
   while(i < mdp1->heapindex){
@@ -205,15 +229,27 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2){
       } 
 
       if(memcmp(addr_block1, addr_block2, (mdp1->heapinfo[i].busy_block.busy_size)) != 0){
-	fprintf(stderr,"Different 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);
-	//fprintf(stderr, "Backtrace size : %d\n", mdp1->heapinfo[i].busy_block.bt_size);
+	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);
+
+	/* Hamming distance on different blocks */
+	distance = 0;
+	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); 
+	    distance++;
+	    pointer_align = (k / sizeof(void*)) * sizeof(void*); 
+	    fprintf(stderr, "Pointed address : %p (in %s) - %p (in %s)\n", *((void **)((char *)addr_block1 + pointer_align)), get_addr_memory_map(*((void **)((char *)addr_block1 + pointer_align)), s_heap, r_heap), *((void **)((char *)addr_block2 + pointer_align)),get_addr_memory_map(*((void **)((char *)addr_block2 + pointer_align)), s_heap, r_heap) );
+	  }
+	}
+
+	fprintf(stderr, "Hamming distance between blocks : %d\n", distance);
+
 	mmalloc_backtrace_block_display(mdp1, i);
+	mmalloc_backtrace_block_display(mdp2, i);
 	errors++;
       }
 
-      //fprintf(stderr, "Backtrace size : %d\n", mdp1->heapinfo[i].busy_block.bt_size);
-      //mmalloc_backtrace_block_display(mdp1, i);
-	
+   
       i = i + mdp1->heapinfo[i].busy_block.size;
 
     }else{
@@ -249,8 +285,25 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2){
 	    addr_frag1 = (char *)addr_block1 + (j * frag_size);
 	    addr_frag2 = (char *)addr_block2 + (j * frag_size);
 
+
 	    if(memcmp(addr_frag1, addr_frag2, mdp1->heapinfo[i].busy_frag.frag_size[j]) != 0){
-	      fprintf(stderr,"Different 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,"\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);
+
+	      /* Hamming distance on different blocks */
+	      distance = 0;
+	      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); 
+		  distance++;
+		  pointer_align = (k / sizeof(void*)) * sizeof(void*);
+		  fprintf(stderr, "Pointed address : %p (in %s) - %p (in %s)\n", *((void **)((char *)addr_frag1 + pointer_align)), get_addr_memory_map(*((void **)((char *)addr_frag1 + pointer_align)), s_heap, r_heap), *((void **)((char *)addr_frag2 + pointer_align)), get_addr_memory_map(*((void **)((char *)addr_frag2 + pointer_align)), s_heap, r_heap));
+		}
+	      }
+
+	      fprintf(stderr, "Hamming distance between fragments : %d\n", distance);
+
+	      mmalloc_backtrace_fragment_display(mdp1, i, j);
+	      mmalloc_backtrace_fragment_display(mdp2, i, j);
 	      errors++;
 	    }
 
@@ -274,6 +327,62 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2){
 }
 
 
+const char* get_addr_memory_map(void *addr, void* s_heap, void* r_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 */
+
+  fp = fopen("/proc/self/maps", "r");
+  
+  if(fp == NULL)
+    perror("fopen failed");
+
+  if(addr == NULL)
+    return "nil";
+
+  char *lfields[6], *start, *end, *endptr;
+  int i;
+  void *start_addr;
+  void *end_addr;
+
+  while ((read = getline(&line, &n, fp)) != -1) {
+
+    line[read - 1] = '\0';
+
+    lfields[0] = strtok(line, " ");
+
+    for (i = 1; i < 6; i++) {
+      lfields[i] = strtok(NULL, " ");
+    }
+
+    start = strtok(lfields[0], "-");
+    start_addr = (void *) strtoul(start, &endptr, 16); 
+   
+    if(start_addr == s_heap)
+      lfields[5] = strdup("std_heap");
+    if(start_addr == r_heap)
+      lfields[5] = strdup("raw_heap");
+    end = strtok(NULL, "-");
+    end_addr = (void *) strtoul(end, &endptr, 16); 
+   
+    if((addr > start_addr) && ( addr < end_addr)){
+      free(line);
+      fclose(fp);
+      if(lfields[5] != NULL){
+	return lfields[5];
+      }else{
+	return "Anonymous";
+      }
+    }
+    
+  }
+
+  return "Unknown area";
+
+}
+
 void mmalloc_display_info_heap(xbt_mheap_t h){
 
 }