X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/d344049c320eee19a74e2fe4e1be14986207d83b..71439b265c816a3470801cade312b002553bf817:/src/mc/mc_checkpoint.c

diff --git a/src/mc/mc_checkpoint.c b/src/mc/mc_checkpoint.c
index a2bb87b08f..60f74e5805 100644
--- a/src/mc/mc_checkpoint.c
+++ b/src/mc/mc_checkpoint.c
@@ -1,5 +1,11 @@
+/* Copyright (c) 2008-2012 Da SimGrid Team. All rights reserved.            */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
 #include <libgen.h>
-#include "private.h"
+#include "mc_private.h"
+#include "xbt/module.h"
 
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_checkpoint, mc,
@@ -18,7 +24,9 @@ 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);
+  
   return new_reg;
 }
 
@@ -26,7 +34,11 @@ 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 */
+ 
+  XBT_DEBUG("Memcpy : dest %p, src %p, size %zu", reg->start_addr, reg->data, reg->size);
   memcpy(reg->start_addr, reg->data, reg->size);
+ 
+  return;
 }
 
 static void MC_region_destroy(mc_mem_region_t reg)
@@ -37,6 +49,17 @@ 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;
@@ -47,10 +70,34 @@ 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();
 
-  XBT_DEBUG("Take snapshot");
+  /* 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);
+        } 
+      }
+    }
+    i++;
+  }
+
+  /* FIXME: free the memory map */
+}
+
+void MC_take_snapshot_liveness(mc_snapshot_t snapshot)
+{
+  unsigned int i = 0;
+  s_map_region_t reg;
+  memory_map_t maps = get_memory_map();
 
   /* Save the std heap and the writable mapped pages of libsimgrid */
   while (i < maps->mapsize) {
@@ -63,21 +110,38 @@ void MC_take_snapshot(mc_snapshot_t snapshot)
       } 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(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);
+          } 
         }
       }
     }
     i++;
   }
 
-
   /* FIXME: free the memory map */
 }
 
 void MC_restore_snapshot(mc_snapshot_t snapshot)
 {
   unsigned int i;
-  for(i=0; i < snapshot->num_reg; 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");
+      break;
+    case 1:
+      XBT_DEBUG("libsimgrid (data) restored");
+      break;
+    case 2:
+      XBT_DEBUG("data program restored");
+      break;
+    }
+
+  }
+
 }
 
 void MC_free_snapshot(mc_snapshot_t snapshot)
@@ -88,3 +152,109 @@ void MC_free_snapshot(mc_snapshot_t snapshot)
 
   xbt_free(snapshot);
 }
+
+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 int data_program_region_compare(void *d1, void *d2, size_t size){
+  int distance = 0;
+  int i;
+  
+  for(i=0; i<size; i++){
+    if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
+      fprintf(stderr,"Different byte (offset=%d) (%p - %p) in data program region\n", i, (char *)d1 + i, (char *)d2 + i);
+      distance++;
+    }
+  }
+  
+  fprintf(stderr, "Hamming distance between data program regions : %d\n", distance);
+
+  return distance;
+}
+
+int data_libsimgrid_region_compare(void *d1, void *d2, size_t size){
+  int distance = 0;
+  int i;
+  
+  for(i=0; i<size; i++){
+    if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
+      fprintf(stderr, "Different byte (offset=%d) (%p - %p) in data libsimgrid region\n", i, (char *)d1 + i, (char *)d2 + i);
+      distance++;
+    }
+  }
+  
+  fprintf(stderr, "Hamming distance between data libsimgrid regions : %d\n", distance);
+  
+  return distance;
+}
+
+int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
+
+  
+  if(s1->num_reg != s2->num_reg){
+    XBT_INFO("Different num_reg (s1 = %u, s2 = %u)", s1->num_reg, s2->num_reg);
+    return 1;
+  }
+
+  int i;
+  int errors = 0;
+
+  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:
+      if(s1->regions[i]->size != s2->regions[i]->size){
+        XBT_INFO("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_INFO("Different start addr of heap (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
+        errors++;
+      }
+      if(mmalloc_compare_heap(s1->regions[i]->data, s2->regions[i]->data)){
+        XBT_INFO("Different heap (mmalloc_compare)");
+        errors++; 
+      }
+      break;
+    case 1 :
+      if(s1->regions[i]->size != s2->regions[i]->size){
+        XBT_INFO("Different size of libsimgrid (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_INFO("Different start addr of libsimgrid (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_INFO("Different memcmp for data in libsimgrid");
+        errors++;
+      }
+      break;
+    case 2 :
+      if(s1->regions[i]->size != s2->regions[i]->size){
+        XBT_INFO("Different size of data program (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_INFO("Different start addr of data program (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
+        errors++;
+      }
+      if(data_program_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
+        XBT_INFO("Different memcmp for data in program");
+        errors++;
+      }
+      break;
+    default:
+      break;
+    }
+  }
+
+  return (errors > 0);
+  
+}
+