X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/07c319ec54d6fc778ee3cc5e75a747242006723e..633f3ab4f0f29940ea9759bfe3dc4f8ec37595e8:/src/mc/mc_checkpoint.c

diff --git a/src/mc/mc_checkpoint.c b/src/mc/mc_checkpoint.c
index d416f72a16..dcf1a36d5f 100644
--- a/src/mc/mc_checkpoint.c
+++ b/src/mc/mc_checkpoint.c
@@ -1,18 +1,26 @@
-#include "private.h"
+#include <libgen.h>
+#include "mc_private.h"
 
-static mc_mem_region_t MC_region_new(void *start_addr, size_t size);
+
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_checkpoint, mc,
+                                "Logging specific to mc_checkpoint");
+
+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, void *start_addr, size_t size);
+static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size);
 
-static mc_mem_region_t MC_region_new(void *start_addr, 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);
+  new_reg->type = type;
   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;
 }
 
@@ -20,7 +28,32 @@ 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 */
-  memcpy(reg->start_addr, reg->data, reg->size);
+  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);
+  }
+  
+  return;
 }
 
 static void MC_region_destroy(mc_mem_region_t reg)
@@ -29,9 +62,20 @@ static void MC_region_destroy(mc_mem_region_t reg)
   xbt_free(reg);
 }
 
-static void MC_snapshot_add_region(mc_snapshot_t snapshot, void *start_addr, size_t size)
+static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size)
 {
-  mc_mem_region_t new_reg = MC_region_new(start_addr, 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;
   snapshot->num_reg++;
@@ -40,28 +84,122 @@ static void MC_snapshot_add_region(mc_snapshot_t snapshot, void *start_addr, siz
 
 void MC_take_snapshot(mc_snapshot_t snapshot)
 {
-  unsigned int i;
+  unsigned int i = 0;
+  s_map_region reg;
+  memory_map_t maps = get_memory_map();
+
+  /* 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 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;
+
+  /* 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_to_restore_liveness(mc_snapshot_t snapshot)
+{
+  unsigned int i = 0;
   s_map_region reg;
   memory_map_t maps = get_memory_map();
 
-  /* Save all the writable mapped pages except the  and the stack */
-  for (i = 0; i < maps->mapsize; i++) {
+  for(i=0; i< snapshot->num_reg; i++){
+    MC_region_destroy(snapshot->regions[i]);
+  }
+
+  snapshot->num_reg = 0;
+
+  i = 0;
+
+  /* Save the std heap and the writable mapped pages of libsimgrid */
+  while (i < maps->mapsize) {
     reg = maps->regions[i];
-    if((reg.prot & PROT_WRITE)
-       && (reg.pathname == NULL
-           || (strncmp(reg.pathname, "/dev/zero", 9)
-               && strncmp(reg.pathname, "[stack]", 7)))){
-      MC_snapshot_add_region(snapshot, reg.start_addr,
-                             (char*)reg.end_addr - (char*)reg.start_addr);
+    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);
+	  } 
+	}
+      }
     }
+    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)
@@ -72,3 +210,5 @@ void MC_free_snapshot(mc_snapshot_t snapshot)
 
   xbt_free(snapshot);
 }
+
+