X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/199b029b33b5b9fbe1eacb50828914f3b38bde2f..3ce8390e04369fc85458df13a3718b4bd00b94d3:/src/mc/mc_checkpoint.c

diff --git a/src/mc/mc_checkpoint.c b/src/mc/mc_checkpoint.c
index 5abffdad14..26b56fbe88 100644
--- a/src/mc/mc_checkpoint.c
+++ b/src/mc/mc_checkpoint.c
@@ -1,23 +1,218 @@
-#include "private.h"
+/* 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 "mc_private.h"
+#include "xbt/module.h"
+
+#include "../simix/smx_private.h"
+
+#include <libunwind.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 void add_value(xbt_dynar_t *list, const char *type, unsigned long int val);
+static xbt_dynar_t take_snapshot_stacks(void *heap);
+static void get_local_variables_values(xbt_dynar_t *all_variables, stack_region_t stack, void *heap);
+static void print_local_variables_values(xbt_dynar_t all_variables);
+
+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);
+  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;
+}
+
+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);
+ 
+  return;
+}
+
+static void MC_region_destroy(mc_mem_region_t reg)
+{
+  xbt_free(reg->data);
+  xbt_free(reg);
+}
+
+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(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++;
+  return;
+} 
 
 void MC_take_snapshot(mc_snapshot_t snapshot)
-{  
-/* Save the heap! */
-	snapshot->heap_size = MC_save_heap(&(snapshot->heap));    
+{
+  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) {
+    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++;
+  }
+
+  free_memory_map(maps);
+}
+
+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();
+  int nb_reg = 0;
+  void *heap = NULL;
+
+  /* Save the std heap and the writable mapped pages of libsimgrid */
+  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);
+          heap = snapshot->regions[nb_reg]->data;
+          nb_reg++;
+        }
+      } 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++;
+  }
+
+  snapshot->stacks = take_snapshot_stacks(heap);
+  
+  free_memory_map(maps);
 
-/* Save data and bss that */
-  snapshot->data_size = MC_save_dataseg(&(snapshot->data));
 }
 
 void MC_restore_snapshot(mc_snapshot_t snapshot)
-{ 
-  MC_restore_heap(snapshot->heap, snapshot->heap_size);
-  MC_restore_dataseg(snapshot->data, snapshot->data_size);  
+{
+  unsigned int i;
+  for(i=0; i < snapshot->num_reg; i++){
+    MC_region_restore(snapshot->regions[i]);
+  }
+
 }
 
 void MC_free_snapshot(mc_snapshot_t snapshot)
 {
-  xbt_free(snapshot->heap);
-  xbt_free(snapshot->data);
-  xbt_free(snapshot);   
+  unsigned int i;
+  for(i=0; i < snapshot->num_reg; i++)
+    MC_region_destroy(snapshot->regions[i]);
+
+  xbt_free(snapshot);
 }
+
+
+void get_plt_section(){
+
+  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);
+
+}
+