X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/56048e3bbbccaeb0c3f1ec9d0105048d7e122af1..8eb44d6e2b6c63e7a18fe315f00da4dca0957324:/src/mc/mc_checkpoint.c

diff --git a/src/mc/mc_checkpoint.c b/src/mc/mc_checkpoint.c
index 1ab97ea4c2..6d9dc31bbd 100644
--- a/src/mc/mc_checkpoint.c
+++ b/src/mc/mc_checkpoint.c
@@ -5,17 +5,24 @@
 
 #include <libgen.h>
 #include "mc_private.h"
-
+#include "xbt/module.h"
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_checkpoint, mc,
                                 "Logging specific to mc_checkpoint");
 
+void *start_text_libsimgrid;
+void *start_plt, *end_plt;
+char *libsimgrid_path;
+
 static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size);
 static void MC_region_restore(mc_mem_region_t reg);
 static void MC_region_destroy(mc_mem_region_t reg);
 
 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size);
 
+static int data_program_region_compare(void *d1, void *d2, size_t size);
+static int data_libsimgrid_region_compare(void *d1, void *d2, size_t size);
+
 static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size)
 {
   mc_mem_region_t new_reg = xbt_new0(s_mc_mem_region_t, 1);
@@ -23,8 +30,9 @@ static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size)
   new_reg->start_addr = start_addr;
   new_reg->size = size;
   new_reg->data = xbt_malloc0(size);
-  XBT_DEBUG("New reg data %p, start_addr %p, size %zu", new_reg->data, start_addr, size);
   memcpy(new_reg->data, start_addr, size);
+
+  XBT_DEBUG("New region : type : %d, data : %p, size : %zu", type, new_reg->data, size);
   
   return new_reg;
 }
@@ -33,31 +41,9 @@ static void MC_region_restore(mc_mem_region_t reg)
 {
   /*FIXME: check if start_addr is still mapped, if it is not, then map it
     before copying the data */
-  if(reg->type == 3){
-    memory_map_t maps = get_memory_map();
-    MC_UNSET_RAW_MEM;
-    unsigned int i=0;
-    s_map_region r;
-    while(i < maps->mapsize){
-      r = maps->regions[i];
-      if (maps->regions[i].pathname != NULL){
-	if (!memcmp(maps->regions[i].pathname, "[stack]", 7)){
-	  size_t diff = (char*)reg->start_addr - (char*)r.start_addr;
-	  void *segment = malloc(reg->size + diff);
-	  XBT_DEBUG("Size of segment : %zu", sizeof(segment));
-	  memcpy((char *)segment + diff, reg->data, reg->size);
-	  memcpy(r.start_addr, segment, sizeof(segment));
-	  XBT_DEBUG("Memcpy region ok");
-	  break;
-	}
-      }
-      i++;
-    }
-  }else{
-    XBT_DEBUG("Memcpy : dest %p, src %p, size %zu", reg->start_addr, reg->data, reg->size);
-    memcpy(reg->start_addr, reg->data, reg->size);
-  }
-  
+ 
+  memcpy(reg->start_addr, reg->data, reg->size);
+ 
   return;
 }
 
@@ -69,17 +55,6 @@ static void MC_region_destroy(mc_mem_region_t reg)
 
 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size)
 {
-  switch(type){
-  case 0 : 
-    XBT_DEBUG("New region heap (%zu)", size);
-    break;
-  case 1 : 
-    XBT_DEBUG("New region libsimgrid (%zu)", size);
-    break;
-  case 2 : 
-    XBT_DEBUG("New region program data (%zu)", size);
-    break;
-  }
   mc_mem_region_t new_reg = MC_region_new(type, start_addr, size);
   snapshot->regions = xbt_realloc(snapshot->regions, (snapshot->num_reg + 1) * sizeof(mc_mem_region_t));
   snapshot->regions[snapshot->num_reg] = new_reg;
@@ -90,7 +65,7 @@ static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start
 void MC_take_snapshot(mc_snapshot_t snapshot)
 {
   unsigned int i = 0;
-  s_map_region reg;
+  s_map_region_t reg;
   memory_map_t maps = get_memory_map();
 
   /* Save the std heap and the writable mapped pages of libsimgrid */
@@ -110,110 +85,270 @@ void MC_take_snapshot(mc_snapshot_t snapshot)
     i++;
   }
 
-  /* FIXME: free the memory map */
+  free_memory_map(maps);
 }
 
-
 void MC_take_snapshot_liveness(mc_snapshot_t snapshot)
 {
   unsigned int i = 0;
-  s_map_region reg;
+  s_map_region_t reg;
   memory_map_t maps = get_memory_map();
-
-  for(i=0; i< snapshot->num_reg; i++){
-    MC_region_destroy(snapshot->regions[i]);
-  }
-
-  snapshot->num_reg = 0;
-
-  i = 0;
+  int nb_reg = 0;
 
   /* Save the std heap and the writable mapped pages of libsimgrid */
-  while (i < maps->mapsize) {
+  while (i < maps->mapsize && nb_reg < 3) {
     reg = maps->regions[i];
     if ((reg.prot & PROT_WRITE)){
       if (maps->regions[i].pathname == NULL){
         if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
-	  MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
+          MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
+          nb_reg++;
         }
-      }else {
+      } else {
         if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
           MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
-        } 
+          nb_reg++;
+        } else {
+          if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
+            MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
+            nb_reg++;
+          }
+        }
+      }
+    }else if ((reg.prot & PROT_READ)){
+      if (maps->regions[i].pathname != NULL){
+        if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
+          start_text_libsimgrid = reg.start_addr;
+          libsimgrid_path = strdup(maps->regions[i].pathname);
+        }
       }
     }
     i++;
   }
+  
+  free_memory_map(maps);
 
-  /* FIXME: free the memory map */
 }
 
-void MC_take_snapshot_to_restore_liveness(mc_snapshot_t snapshot)
+void MC_restore_snapshot(mc_snapshot_t snapshot)
 {
-  unsigned int i = 0;
-  s_map_region reg;
-  memory_map_t maps = get_memory_map();
+  unsigned int i;
+  for(i=0; i < snapshot->num_reg; i++){
+    MC_region_restore(snapshot->regions[i]);
+  }
 
-  for(i=0; i< snapshot->num_reg; i++){
+}
+
+void MC_free_snapshot(mc_snapshot_t snapshot)
+{
+  unsigned int i;
+  for(i=0; i < snapshot->num_reg; i++)
     MC_region_destroy(snapshot->regions[i]);
-  }
 
-  snapshot->num_reg = 0;
+  xbt_free(snapshot);
+}
+
+static int data_program_region_compare(void *d1, void *d2, size_t size){
+  int distance = 0;
+  size_t i = 0;
+  
+  for(i=0; i<size; i++){
+    if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
+      XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data program region", i, (char *)d1 + i, (char *)d2 + i);
+      distance++;
+    }
+  }
+  
+  XBT_DEBUG("Hamming distance between data program regions : %d", distance);
 
-  i = 0;
+  return distance;
+}
 
-  /* Save the std heap and the writable mapped pages of libsimgrid */
-  while (i < maps->mapsize) {
-    reg = maps->regions[i];
-    if ((reg.prot & PROT_WRITE)){
-      if (maps->regions[i].pathname == NULL){
-        if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
-	  MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
-        }
-      } else {
-        if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
-          MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
-        } else {
-	  if (!memcmp(basename(maps->regions[i].pathname), basename(prog_name), strlen(basename(prog_name)))){
-	    MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
-	  } 
-	}
+static int data_libsimgrid_region_compare(void *d1, void *d2, size_t size){
+  int distance = 0;
+  size_t i = 0;
+  int pointer_align;
+  void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
+
+  for(i=0; i<size; i++){
+    if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
+      pointer_align = (i / sizeof(void*)) * sizeof(void*);
+      addr_pointed1 = *((void **)((char *)d1 + pointer_align));
+      addr_pointed2 = *((void **)((char *)d2 + pointer_align));
+      if((addr_pointed1 > start_plt && addr_pointed1 < end_plt) || (addr_pointed2 > start_plt && addr_pointed2 < end_plt)){
+        continue;
+      }else{
+        XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data libsimgrid region", i, (char *)d1 + i, (char *)d2 + i);
+        XBT_DEBUG("Addresses pointed : %p - %p\n", addr_pointed1, addr_pointed2);
+        distance++;
       }
     }
-    i++;
   }
+  
+  XBT_DEBUG("Hamming distance between data libsimgrid regions : %d", distance); fflush(NULL);
+  
+  return distance;
+}
 
-  /* FIXME: free the memory map */
+static int heap_region_compare(void *d1, void *d2, size_t size);
+
+static int heap_region_compare(void *d1, void *d2, size_t size){
+  
+  int distance = 0;
+  size_t i = 0;
+  
+  for(i=0; i<size; i++){
+    if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
+      //XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in heap region", i, (char *)d1 + i, (char *)d2 + i);
+      distance++;
+    }
+  }
+  
+  XBT_DEBUG("Hamming distance between heap regions : %d (total size : %zu)", distance, size);
+
+  return distance;
 }
 
-void MC_restore_snapshot(mc_snapshot_t snapshot)
-{
-  unsigned int i;
-  for(i=0; i < snapshot->num_reg; i++){
-    MC_region_restore(snapshot->regions[i]);
-    switch(snapshot->regions[i]->type){
-    case 0 : 
-      XBT_DEBUG("heap restored");
+int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
+
+  int errors = 0, i;
+  //int dist = 0;
+
+  
+  if(s1->num_reg != s2->num_reg){
+    XBT_DEBUG("Different num_reg (s1 = %u, s2 = %u)", s1->num_reg, s2->num_reg);
+    return 1;
+  }
+
+  for(i=0 ; i< s1->num_reg ; i++){
+    
+    if(s1->regions[i]->type != s2->regions[i]->type){
+      XBT_INFO("Different type of region");
+      errors++;
+    }
+    
+    switch(s1->regions[i]->type){
+    case 0 :
+      /* Compare heapregion */
+      if(s1->regions[i]->size != s2->regions[i]->size){
+        XBT_DEBUG("Different size of heap (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
+        errors++;
+      }
+      if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
+        XBT_DEBUG("Different start addr of heap (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
+        errors++;
+      }
+      if(mmalloc_compare_heap((xbt_mheap_t)s1->regions[i]->data, (xbt_mheap_t)s2->regions[i]->data)){
+        XBT_DEBUG("Different heap (mmalloc_compare)");
+        errors++; 
+      }
+      /*if(heap_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
+        XBT_DEBUG("Different memcmp for heap");
+        errors++;
+        }*/
+      /*if((dist = mmalloc_linear_compare_heap((xbt_mheap_t)s1->regions[i]->data, (xbt_mheap_t)s2->regions[i]->data)) > 0){
+        XBT_DEBUG("Different heap (mmalloc_linear_compare) : %d", dist);
+        errors++; 
+        }*/
       break;
-    case 1:
-      XBT_DEBUG("libsimgrid (data) restored");
+    case 1 :
+      /* Compare data libsimgrid region */
+      if(s1->regions[i]->size != s2->regions[i]->size){
+        XBT_DEBUG("Different size of libsimgrid (data) (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
+        errors++;
+      }
+      if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
+        XBT_DEBUG("Different start addr of libsimgrid (data) (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
+        errors++;
+      }
+      if(data_libsimgrid_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
+        XBT_DEBUG("Different memcmp for data in libsimgrid");
+        errors++;
+      }
       break;
-    case 2:
-      XBT_DEBUG("data program restored");
+
+    case 2 :
+       /* Compare data program region */
+      if(s1->regions[i]->size != s2->regions[i]->size){
+        XBT_DEBUG("Different size of data program (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
+        //errors++;
+        return 1;
+      }
+      if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
+        XBT_DEBUG("Different start addr of data program (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
+        //errors++;
+        return 1;
+      }
+      if(data_program_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
+        XBT_DEBUG("Different memcmp for data in program");
+        //errors++;
+        return 1;
+      }
       break;
+ 
     }
 
   }
 
+
+  return errors > 0;
+  
 }
 
-void MC_free_snapshot(mc_snapshot_t snapshot)
-{
-  unsigned int i;
-  for(i=0; i < snapshot->num_reg; i++)
-    MC_region_destroy(snapshot->regions[i]);
+void get_plt_section(){
 
-  xbt_free(snapshot);
-}
+  FILE *fp;
+  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 */
+
+  char *lfields[7];
+  int i, plt_not_found = 1;
+  unsigned long int size, offset;
+
+  char *command = bprintf( "objdump --section-headers %s", libsimgrid_path);
+
+  fp = popen(command, "r");
+
+  if(fp == NULL)
+    perror("popen failed");
 
+  while ((read = getline(&line, &n, fp)) != -1 && plt_not_found == 1) {
+
+    if(n == 0)
+      continue;
+
+     /* Wipeout the new line character */
+    line[read - 1] = '\0';
+
+    lfields[0] = strtok(line, " ");
+
+    if(lfields[0] == NULL)
+      continue;
+
+    if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strcmp(lfields[0], "libsimgrid.so:") == 0)
+      continue;
+
+    for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
+      lfields[i] = strtok(NULL, " ");
+    }
+
+    if(i>=5){
+      if(strcmp(lfields[1], ".plt") == 0){
+        size = strtoul(lfields[2], NULL, 16);
+        offset = strtoul(lfields[4], NULL, 16);
+        start_plt = (char *)start_text_libsimgrid + offset;
+        end_plt = (char *)start_plt + size;
+        plt_not_found = 0;
+      }
+    }
+    
+    
+  }
+
+  free(command);
+  free(line);
+  pclose(fp);
+
+}