X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/17c6b11aff7b32922cbc2255975d8a257687045c..255034c505d975829a242b98eceeb2c2a4df4517:/src/xbt/mmalloc/mm_diff.c

diff --git a/src/xbt/mmalloc/mm_diff.c b/src/xbt/mmalloc/mm_diff.c
index b0fe4c79f2..14adfa21b5 100644
--- a/src/xbt/mmalloc/mm_diff.c
+++ b/src/xbt/mmalloc/mm_diff.c
@@ -6,6 +6,7 @@
  * under the terms of the license (GNU LGPL) which comes with this package. */
 
 #include "xbt/ex_interface.h" /* internals of backtrace setup */
+#include "xbt/str.h"
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mm_diff, xbt,
                                 "Logging specific to mm_diff in mmalloc");
@@ -52,22 +53,83 @@ void mmalloc_backtrace_display(xbt_mheap_t mdp, void *ptr){
   }
 }
 
-int mmalloc_compare_heap(xbt_mheap_t mdp1, xbt_mheap_t mdp2, void *std_heap_addr){
+
+void mmalloc_backtrace_block_display(xbt_mheap_t mdp, size_t block){
+
+  int type;
+  xbt_ex_t e;
+
+  type = mdp->heapinfo[block].type;
+
+  if (type != 0) {
+    fprintf(stderr,"Only full blocks are backtraced for now. Ignoring your request.\n");
+    return;
+  }
+  if (mdp->heapinfo[block].busy_block.bt_size == 0) {
+    fprintf(stderr,"No backtrace available for that block, sorry.\n");
+    return;
+  }
+
+  memcpy(&e.bt,&(mdp->heapinfo[block].busy_block.bt),sizeof(void*)*XBT_BACKTRACE_SIZE);
+  e.used = mdp->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 %zu where malloced (%d frames):\n", 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);
+    }
+  }
+}
+
+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, std_heap_addr);
+  int errors = mmalloc_compare_mdesc(mdp1, mdp2, s_heap, r_heap);
 
   return (errors > 0);
 
 }
 
-int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void *std_heap_addr){
+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;
   }
@@ -90,21 +152,18 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void *std_heap
   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;
@@ -133,8 +192,7 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void *std_heap
   if(mdp1->version != mdp2->version){
     fprintf(stderr,"Different version of the mmalloc package\n");
     return 1;
-  }
-
+    }*/
 
   size_t i, j;
   void *addr_block1, *addr_block2, *addr_frag1, *addr_frag2;
@@ -142,36 +200,68 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void *std_heap
 
   i = 0;
 
+  int k;
+  int distance = 0;
+  int pointer_align;
+
+  char *pointed_address1 = NULL, *pointed_address2 = NULL;
+
   /* Check busy blocks*/
 
-  while(i < mdp1->heapindex){
+  while(i < mdp1->heaplimit){
 
     if(mdp1->heapinfo[i].type != mdp2->heapinfo[i].type){
       fprintf(stderr,"Different type of block : %d - %d\n", mdp1->heapinfo[i].type, mdp2->heapinfo[i].type);
-      return 1;
+      errors++;
     }
 
-    addr_block1 = (char *)mdp1 + sizeof(struct mdesc) + (i * BLOCKSIZE);
-    addr_block2 = (char *)mdp2 + sizeof(struct mdesc) + (i * BLOCKSIZE);
+    addr_block1 = (char *)mdp1 + mdp1->headersize + ((i-1) * BLOCKSIZE);
+    addr_block2 = (char *)mdp2 + mdp2->headersize + ((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){
 	fprintf(stderr,"Different size of a large cluster : %zu - %zu\n", mdp1->heapinfo[i].busy_block.size, mdp2->heapinfo[i].busy_block.size);
-	return 1;
+	errors++;
       } 
 
       if(mdp1->heapinfo[i].busy_block.busy_size != mdp2->heapinfo[i].busy_block.busy_size){
 	fprintf(stderr,"Different busy_size of a large cluster : %zu - %zu\n", mdp1->heapinfo[i].busy_block.busy_size, mdp2->heapinfo[i].busy_block.busy_size);
-	return 1;
+	errors++;
       } 
 
+      //if(memcmp(addr_block1, addr_block2, (mdp1->heapinfo[i].busy_block.size)) != 0){
       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);
-	return 1;
+	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.size;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); 
+	    distance++;
+	    pointer_align = (k / sizeof(void*)) * sizeof(void*); 
+	    pointed_address1 = xbt_strdup(get_addr_memory_map(*((void **)((char *)addr_block1 + pointer_align)), s_heap, r_heap));
+	    pointed_address2 = xbt_strdup(get_addr_memory_map(*((void **)((char *)addr_block2 + pointer_align)), s_heap, r_heap));
+	    fprintf(stderr, "Pointed address : %p (in %s) - %p (in %s)\n", *((void **)((char *)addr_block1 + pointer_align)), pointed_address1, *((void **)((char *)addr_block2 + pointer_align)), pointed_address2);
+	    if((strcmp(pointed_address1, pointed_address2) == 0) && (strcmp(pointed_address1, "std_heap") == 0)){
+	      /* FIXME : compare value pointed thanks to DWARF */
+	    }
+	  }
+	}
+
+	fprintf(stderr, "Hamming distance between blocks : %d\n", distance);
+
+	mmalloc_backtrace_block_display(mdp1, i);
+	mmalloc_backtrace_block_display(mdp2, i);
+	errors++;
       }
 
-      i = i + mdp1->heapinfo[i].busy_block.size;
+      if( mdp1->heapinfo[i].busy_block.size == 0)
+	i = i + 1;
+      else
+	i = i + mdp1->heapinfo[i].busy_block.size;
 
     }else{
       
@@ -179,35 +269,59 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void *std_heap
 
 	if(mdp1->heapinfo[i].type != mdp2->heapinfo[i].type){
 	  fprintf(stderr,"Different size of fragments in fragmented block %zu : %d - %d\n", i, mdp1->heapinfo[i].type, mdp2->heapinfo[i].type);
-	  return 1;
+	  errors++;
 	}
 
 	if(mdp1->heapinfo[i].busy_frag.nfree != mdp2->heapinfo[i].busy_frag.nfree){
 	  fprintf(stderr,"Different free fragments in fragmented block %zu : %zu - %zu\n", i, mdp1->heapinfo[i].busy_frag.nfree, mdp2->heapinfo[i].busy_frag.nfree);
-	  return 1;
+	  errors++;
 	} 
 	
 	if(mdp1->heapinfo[i].busy_frag.first != mdp2->heapinfo[i].busy_frag.first){
 	  fprintf(stderr,"Different busy_size of a large cluster : %zu - %zu\n", mdp1->heapinfo[i].busy_block.busy_size, mdp2->heapinfo[i].busy_block.busy_size);
-	  return 1;
+	  errors++;
 	} 
 
-	for(j=0; j< MAX_FRAGMENT_PER_BLOCK; j++){
+	frag_size = pow(2, mdp1->heapinfo[i].type);
+
+	for(j=0; j< (BLOCKSIZE/frag_size); j++){
 
 	  if(mdp1->heapinfo[i].busy_frag.frag_size[j] != mdp2->heapinfo[i].busy_frag.frag_size[j]){
-	    fprintf(stderr,"Different busy_size for fragment %zu in block %zu : %u - %u\n", j, i, mdp1->heapinfo[i].busy_frag.frag_size[j], mdp2->heapinfo[i].busy_frag.frag_size[j]);
-	    return 1;
+	    fprintf(stderr,"Different busy_size for fragment %zu in block %zu : %hu - %hu\n", j, i, mdp1->heapinfo[i].busy_frag.frag_size[j], mdp2->heapinfo[i].busy_frag.frag_size[j]);
+	    errors++;
 	  }
 
 	  if(mdp1->heapinfo[i].busy_frag.frag_size[j] > 0){
 	    
-	    frag_size = pow(2, mdp1->heapinfo[i].type);
 	    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){
-	      fprintf(stderr,"Different data in fragment %zu in block %zu \n", j, i);
-	      return 1;
+	    //if(memcmp(addr_frag1, addr_frag2, frag_size) != 0){
+	    if(memcmp(addr_frag1, addr_frag2, mdp1->heapinfo[i].busy_frag.frag_size[j]) != 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);
+
+	      /* 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); 
+		  distance++;
+		  pointer_align = (k / sizeof(void*)) * sizeof(void*);
+		  pointed_address1 = xbt_strdup(get_addr_memory_map(*((void **)((char *)addr_frag1 + pointer_align)), s_heap, r_heap));
+		  pointed_address2 = xbt_strdup(get_addr_memory_map(*((void **)((char *)addr_frag2 + pointer_align)), s_heap, r_heap));
+		  fprintf(stderr, "Pointed address : %p (in %s) - %p (in %s)\n", *((void **)((char *)addr_frag1 + pointer_align)), pointed_address1, *((void **)((char *)addr_frag2 + pointer_align)), pointed_address2);
+		  if((strcmp(pointed_address1, pointed_address2) == 0) && (strcmp(pointed_address1, "std_heap") == 0)){
+		    /* FIXME : compare value pointed thanks to DWARF */
+		  } 
+		}
+	      }
+
+	      fprintf(stderr, "Hamming distance between fragments : %d\n", distance);
+
+	      mmalloc_backtrace_fragment_display(mdp1, i, j);
+	      mmalloc_backtrace_fragment_display(mdp2, i, j);
+	      errors++;
 	    }
 
 	  }
@@ -225,11 +339,67 @@ int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void *std_heap
 
   }
 
+  free(pointed_address1);
+  free(pointed_address2);
 
-  return 0;
+  return (errors);
 }
 
 
+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){
+    free(line);
+    fclose(fp);
+    return "nil";
+  }
+
+  xbt_dynar_t lfields = NULL;
+  xbt_dynar_t start_end  = NULL;
+  void *start_addr;
+  void *end_addr;
+
+  while ((read = getline(&line, &n, fp)) != -1) {
+
+    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);
+
+    if((addr > start_addr) && ( addr < end_addr)){
+      free(line);
+      fclose(fp);
+      if(start_addr == s_heap)
+	return "std_heap";
+      if(start_addr == r_heap)
+	return "raw_heap";
+      if(xbt_dynar_length(lfields) == 6)
+	return xbt_dynar_get_as(lfields, xbt_dynar_length(lfields) - 1, char*);
+      else
+	return "Anonymous";
+    }
+
+  }
+
+  free(line);
+  fclose(fp);
+  return "Unknown area";
+
+}
+
 void mmalloc_display_info_heap(xbt_mheap_t h){
 
 }