X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/ff653c762c0cedfa56f7febfe84b50325ec64585..e86b9249c03f07996e386a45add92857c9853963:/src/mc/mc_compare.c

diff --git a/src/mc/mc_compare.c b/src/mc/mc_compare.c
deleted file mode 100644
index 0d9389a005..0000000000
--- a/src/mc/mc_compare.c
+++ /dev/null
@@ -1,703 +0,0 @@
-/* Copyright (c) 2012-2014. The 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 <inttypes.h>
-
-#include "mc_private.h"
-
-#include "xbt/mmalloc.h"
-#include "xbt/mmalloc/mmprivate.h"
-
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_compare, mc,
-                                "Logging specific to mc_compare");
-
-typedef struct s_pointers_pair {
-  void *p1;
-  void *p2;
-} s_pointers_pair_t, *pointers_pair_t;
-
-__thread xbt_dynar_t compared_pointers;
-
-/************************** Free functions ****************************/
-/********************************************************************/
-
-static void stack_region_free(stack_region_t s)
-{
-  if (s) {
-    xbt_free(s->process_name);
-    xbt_free(s);
-  }
-}
-
-static void stack_region_free_voidp(void *s)
-{
-  stack_region_free((stack_region_t) * (void **) s);
-}
-
-static void pointers_pair_free(pointers_pair_t p)
-{
-  xbt_free(p);
-}
-
-static void pointers_pair_free_voidp(void *p)
-{
-  pointers_pair_free((pointers_pair_t) * (void **) p);
-}
-
-/************************** Snapshot comparison *******************************/
-/******************************************************************************/
-
-/** \brief Try to add a pair a compared pointers to the set of compared pointers
- *
- *  \result !=0 if the pointers were added (they were not in the set),
- *      0 otherwise (they were already in the set)
- */
-static int add_compared_pointers(void *p1, void *p2)
-{
-
-  pointers_pair_t new_pair = xbt_new0(s_pointers_pair_t, 1);
-  new_pair->p1 = p1;
-  new_pair->p2 = p2;
-
-  if (xbt_dynar_is_empty(compared_pointers)) {
-    xbt_dynar_push(compared_pointers, &new_pair);
-    return 1;
-  }
-
-  unsigned int cursor = 0;
-  int start = 0;
-  int end = xbt_dynar_length(compared_pointers) - 1;
-  pointers_pair_t pair = NULL;
-
-  pointers_pair_t *p =
-      (pointers_pair_t *) xbt_dynar_get_ptr(compared_pointers, 0);
-
-  while (start <= end) {
-    cursor = (start + end) / 2;
-    pair = p[cursor];
-    if (pair->p1 < p1) {
-      start = cursor + 1;
-    } else if (pair->p1 > p1) {
-      end = cursor - 1;
-    } else if (pair->p2 < p2) {
-      start = cursor + 1;
-    } else if (pair->p2 > p2) {
-      end = cursor - 1;
-    } else {
-      pointers_pair_free(new_pair);
-      return 0;
-    }
-  }
-
-  if (pair->p1 < p1)
-    xbt_dynar_insert_at(compared_pointers, cursor + 1, &new_pair);
-  else if (pair->p1 > p1)
-    xbt_dynar_insert_at(compared_pointers, cursor, &new_pair);
-  else if (pair->p2 < p2)
-    xbt_dynar_insert_at(compared_pointers, cursor + 1, &new_pair);
-  else if (pair->p2 > p2)
-    xbt_dynar_insert_at(compared_pointers, cursor, &new_pair);
-  else
-    xbt_die("Unrecheable");
-
-  return 1;
-}
-
-static int compare_areas_with_type(void* real_area1, mc_snapshot_t snapshot1, mc_mem_region_t region1,
-                                   void* real_area2, mc_snapshot_t snapshot2, mc_mem_region_t region2,
-                                   dw_type_t type, int pointer_level)
-{
-  unsigned int cursor = 0;
-  dw_type_t member, subtype, subsubtype;
-  int elm_size, i, res;
-
-  top:
-  switch (type->type) {
-  case DW_TAG_unspecified_type:
-    return 1;
-
-  case DW_TAG_base_type:
-  case DW_TAG_enumeration_type:
-  case DW_TAG_union_type:
-  {
-    void* data1 =
-      mc_snapshot_read_region(real_area1, region1, alloca(type->byte_size), type->byte_size);
-    void* data2 =
-      mc_snapshot_read_region(real_area2, region1, alloca(type->byte_size), type->byte_size);
-    return (memcmp(data1, data2, type->byte_size) != 0);
-    break;
-  }
-  case DW_TAG_typedef:
-  case DW_TAG_volatile_type:
-  case DW_TAG_const_type:
-    // Poor man's TCO:
-    type = type->subtype;
-    goto top;
-  case DW_TAG_array_type:
-    subtype = type->subtype;
-    switch (subtype->type) {
-    case DW_TAG_unspecified_type:
-      return 1;
-
-    case DW_TAG_base_type:
-    case DW_TAG_enumeration_type:
-    case DW_TAG_pointer_type:
-    case DW_TAG_reference_type:
-    case DW_TAG_rvalue_reference_type:
-    case DW_TAG_structure_type:
-    case DW_TAG_class_type:
-    case DW_TAG_union_type:
-      if (subtype->full_type)
-        subtype = subtype->full_type;
-      elm_size = subtype->byte_size;
-      break;
-    case DW_TAG_const_type:
-    case DW_TAG_typedef:
-    case DW_TAG_volatile_type:
-      subsubtype = subtype->subtype;
-      if (subsubtype->full_type)
-        subsubtype = subsubtype->full_type;
-      elm_size = subsubtype->byte_size;
-      break;
-    default:
-      return 0;
-      break;
-    }
-    for (i = 0; i < type->element_count; i++) {
-      size_t off = i * elm_size;
-      res = compare_areas_with_type(
-            (char*) real_area1 + off, snapshot1, region1,
-            (char*) real_area2 + off, snapshot2, region2,
-            type->subtype, pointer_level);
-      if (res == 1)
-        return res;
-    }
-    break;
-  case DW_TAG_pointer_type:
-  case DW_TAG_reference_type:
-  case DW_TAG_rvalue_reference_type:
-  {
-    void* temp;
-    void* addr_pointed1 = *(void**) mc_snapshot_read_region(real_area1, region1, &temp, sizeof(void**));
-    void* addr_pointed2 = *(void**) mc_snapshot_read_region(real_area2, region2, &temp, sizeof(void**));
-
-    if (type->subtype && type->subtype->type == DW_TAG_subroutine_type) {
-      return (addr_pointed1 != addr_pointed2);
-    } else {
-
-      if (addr_pointed1 == NULL && addr_pointed2 == NULL)
-        return 0;
-      if (!add_compared_pointers(addr_pointed1, addr_pointed2))
-        return 0;
-
-      pointer_level++;
-
-      // Some cases are not handled here:
-      // * the pointers lead to different areas (one to the heap, the other to the RW segment ...);
-      // * a pointer leads to the read-only segment of the current object;
-      // * a pointer lead to a different ELF object.
-
-      if (addr_pointed1 > std_heap
-          && addr_pointed1 < mc_snapshot_get_heap_end(snapshot1)) {
-        if (!
-            (addr_pointed2 > std_heap
-             && addr_pointed2 < mc_snapshot_get_heap_end(snapshot2)))
-          return 1;
-        // The pointers are both in the heap:
-        return compare_heap_area(addr_pointed1, addr_pointed2, snapshot1,
-                                 snapshot2, NULL, type->subtype, pointer_level);
-      }
-      // The pointers are both in the current object R/W segment:
-      else if (addr_pointed1 > region1->start_addr
-               && (char *) addr_pointed1 <= (char *) region1->start_addr + region1->size) {
-        if (!
-            (addr_pointed2 > region2->start_addr
-             && (char *) addr_pointed2 <= (char *) region2->start_addr + region2->size))
-          return 1;
-        if (type->dw_type_id == NULL)
-          return (addr_pointed1 != addr_pointed2);
-        else {
-          return compare_areas_with_type(addr_pointed1, snapshot1, region1,
-                                         addr_pointed2, snapshot2, region2,
-                                         type->subtype, pointer_level);
-        }
-      }
-
-      else {
-        return (addr_pointed1 != addr_pointed2);
-      }
-    }
-    break;
-  }
-  case DW_TAG_structure_type:
-  case DW_TAG_class_type:
-    xbt_dynar_foreach(type->members, cursor, member) {
-      void *member1 =
-        mc_member_resolve(real_area1, type, member, snapshot1);
-      void *member2 =
-        mc_member_resolve(real_area2, type, member, snapshot2);
-      mc_mem_region_t subregion1 = mc_get_region_hinted(member1, snapshot1, region1);
-      mc_mem_region_t subregion2 = mc_get_region_hinted(member2, snapshot2, region2);
-      res =
-          compare_areas_with_type(member1, snapshot1, subregion1,
-                                  member2, snapshot2, subregion2,
-                                  member->subtype, pointer_level);
-      if (res == 1)
-        return res;
-    }
-    break;
-  case DW_TAG_subroutine_type:
-    return -1;
-    break;
-  default:
-    XBT_VERB("Unknown case : %d", type->type);
-    break;
-  }
-
-  return 0;
-}
-
-static int compare_global_variables(int region_type, mc_mem_region_t r1,
-                                    mc_mem_region_t r2, mc_snapshot_t snapshot1,
-                                    mc_snapshot_t snapshot2)
-{
-
-  if (!compared_pointers) {
-    compared_pointers =
-        xbt_dynar_new(sizeof(pointers_pair_t), pointers_pair_free_voidp);
-  } else {
-    xbt_dynar_reset(compared_pointers);
-  }
-
-  xbt_dynar_t variables;
-  int res;
-  unsigned int cursor = 0;
-  dw_variable_t current_var;
-
-  mc_object_info_t object_info = NULL;
-  if (region_type == 2) {
-    object_info = mc_binary_info;
-  } else {
-    object_info = mc_libsimgrid_info;
-  }
-  variables = object_info->global_variables;
-
-  xbt_dynar_foreach(variables, cursor, current_var) {
-
-    // If the variable is not in this object, skip it:
-    // We do not expect to find a pointer to something which is not reachable
-    // by the global variables.
-    if ((char *) current_var->address < (char *) object_info->start_rw
-        || (char *) current_var->address > (char *) object_info->end_rw)
-      continue;
-
-    dw_type_t bvariable_type = current_var->type;
-    res =
-        compare_areas_with_type((char *) current_var->address, snapshot1, r1,
-                                (char *) current_var->address, snapshot2, r2,
-                                bvariable_type, 0);
-    if (res == 1) {
-      XBT_VERB("Global variable %s (%p) is different between snapshots",
-               current_var->name, (char *) current_var->address);
-      xbt_dynar_free(&compared_pointers);
-      compared_pointers = NULL;
-      return 1;
-    }
-
-  }
-
-  xbt_dynar_free(&compared_pointers);
-  compared_pointers = NULL;
-
-  return 0;
-
-}
-
-static int compare_local_variables(mc_snapshot_t snapshot1,
-                                   mc_snapshot_t snapshot2,
-                                   mc_snapshot_stack_t stack1,
-                                   mc_snapshot_stack_t stack2)
-{
-  if (!compared_pointers) {
-    compared_pointers =
-        xbt_dynar_new(sizeof(pointers_pair_t), pointers_pair_free_voidp);
-  } else {
-    xbt_dynar_reset(compared_pointers);
-  }
-
-  if (xbt_dynar_length(stack1->local_variables) !=
-      xbt_dynar_length(stack2->local_variables)) {
-    XBT_VERB("Different number of local variables");
-    xbt_dynar_free(&compared_pointers);
-    compared_pointers = NULL;
-    return 1;
-  } else {
-    unsigned int cursor = 0;
-    local_variable_t current_var1, current_var2;
-    int res;
-    while (cursor < xbt_dynar_length(stack1->local_variables)) {
-      current_var1 =
-          (local_variable_t) xbt_dynar_get_as(stack1->local_variables, cursor,
-                                              local_variable_t);
-      current_var2 =
-          (local_variable_t) xbt_dynar_get_as(stack2->local_variables, cursor,
-                                              local_variable_t);
-      if (strcmp(current_var1->name, current_var2->name) != 0
-          || current_var1->subprogram != current_var1->subprogram
-          || current_var1->ip != current_var2->ip) {
-        xbt_dynar_free(&compared_pointers);
-        // TODO, fix current_varX->subprogram->name to include name if DW_TAG_inlined_subprogram
-        XBT_VERB
-            ("Different name of variable (%s - %s) or frame (%s - %s) or ip (%lu - %lu)",
-             current_var1->name, current_var2->name,
-             current_var1->subprogram->name, current_var2->subprogram->name,
-             current_var1->ip, current_var2->ip);
-        return 1;
-      }
-      // TODO, fix current_varX->subprogram->name to include name if DW_TAG_inlined_subprogram
-
-        dw_type_t subtype = current_var1->type;
-        res =
-            compare_areas_with_type(current_var1->address, snapshot1, mc_get_snapshot_region(current_var1->address, snapshot1),
-                                    current_var2->address, snapshot2, mc_get_snapshot_region(current_var2->address, snapshot2),
-                                    subtype, 0);
-
-      if (res == 1) {
-        // TODO, fix current_varX->subprogram->name to include name if DW_TAG_inlined_subprogram
-        XBT_VERB
-            ("Local variable %s (%p - %p) in frame %s  is different between snapshots",
-             current_var1->name, current_var1->address, current_var2->address,
-             current_var1->subprogram->name);
-        xbt_dynar_free(&compared_pointers);
-        compared_pointers = NULL;
-        return res;
-      }
-      cursor++;
-    }
-    xbt_dynar_free(&compared_pointers);
-    compared_pointers = NULL;
-    return 0;
-  }
-}
-
-int snapshot_compare(void *state1, void *state2)
-{
-
-  mc_snapshot_t s1, s2;
-  int num1, num2;
-
-  if (_sg_mc_liveness) {        /* Liveness MC */
-    s1 = ((mc_visited_pair_t) state1)->graph_state->system_state;
-    s2 = ((mc_visited_pair_t) state2)->graph_state->system_state;
-    num1 = ((mc_visited_pair_t) state1)->num;
-    num2 = ((mc_visited_pair_t) state2)->num;
-  } else {                      /* Safety or comm determinism MC */
-    s1 = ((mc_visited_state_t) state1)->system_state;
-    s2 = ((mc_visited_state_t) state2)->system_state;
-    num1 = ((mc_visited_state_t) state1)->num;
-    num2 = ((mc_visited_state_t) state2)->num;
-  }
-
-  int errors = 0;
-  int res_init;
-
-  xbt_os_timer_t global_timer = xbt_os_timer_new();
-  xbt_os_timer_t timer = xbt_os_timer_new();
-
-  xbt_os_walltimer_start(global_timer);
-
-#ifdef MC_DEBUG
-  xbt_os_walltimer_start(timer);
-#endif
-
-  int hash_result = 0;
-  if (_sg_mc_hash) {
-    hash_result = (s1->hash != s2->hash);
-    if (hash_result) {
-      XBT_VERB("(%d - %d) Different hash : 0x%" PRIx64 "--0x%" PRIx64, num1,
-               num2, s1->hash, s2->hash);
-#ifndef MC_DEBUG
-      return 1;
-#endif
-    } else {
-      XBT_VERB("(%d - %d) Same hash : 0x%" PRIx64, num1, num2, s1->hash);
-    }
-  }
-
-  /* Compare enabled processes */
-  unsigned int cursor;
-  int pid;
-  xbt_dynar_foreach(s1->enabled_processes, cursor, pid){
-    if(!xbt_dynar_member(s2->enabled_processes, &pid))
-      XBT_VERB("(%d - %d) Different enabled processes", num1, num2);
-  }
-
-  int i = 0;
-  size_t size_used1, size_used2;
-  int is_diff = 0;
-
-  /* Compare size of stacks */
-  while (i < xbt_dynar_length(s1->stacks)) {
-    size_used1 = s1->stack_sizes[i];
-    size_used2 = s2->stack_sizes[i];
-    if (size_used1 != size_used2) {
-#ifdef MC_DEBUG
-      if (is_diff == 0) {
-        xbt_os_walltimer_stop(timer);
-        mc_comp_times->stacks_sizes_comparison_time =
-            xbt_os_timer_elapsed(timer);
-      }
-      XBT_DEBUG("(%d - %d) Different size used in stacks : %zu - %zu", num1,
-                num2, size_used1, size_used2);
-      errors++;
-      is_diff = 1;
-#else
-#ifdef MC_VERBOSE
-      XBT_VERB("(%d - %d) Different size used in stacks : %zu - %zu", num1,
-               num2, size_used1, size_used2);
-#endif
-
-      xbt_os_walltimer_stop(timer);
-      xbt_os_timer_free(timer);
-      xbt_os_walltimer_stop(global_timer);
-      mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
-      xbt_os_timer_free(global_timer);
-
-      return 1;
-#endif
-    }
-    i++;
-  }
-
-#ifdef MC_DEBUG
-  if (is_diff == 0)
-    xbt_os_walltimer_stop(timer);
-  xbt_os_walltimer_start(timer);
-#endif
-
-  /* Init heap information used in heap comparison algorithm */
-  xbt_mheap_t heap1 = (xbt_mheap_t) mc_snapshot_read(std_heap, s1,
-    alloca(sizeof(struct mdesc)), sizeof(struct mdesc));
-  xbt_mheap_t heap2 = (xbt_mheap_t) mc_snapshot_read(std_heap, s2,
-    alloca(sizeof(struct mdesc)), sizeof(struct mdesc));
-  res_init = init_heap_information(heap1, heap2, s1->to_ignore, s2->to_ignore);
-  if (res_init == -1) {
-#ifdef MC_DEBUG
-    XBT_DEBUG("(%d - %d) Different heap information", num1, num2);
-    errors++;
-#else
-#ifdef MC_VERBOSE
-    XBT_VERB("(%d - %d) Different heap information", num1, num2);
-#endif
-
-    xbt_os_walltimer_stop(global_timer);
-    mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
-    xbt_os_timer_free(global_timer);
-
-    return 1;
-#endif
-  }
-#ifdef MC_DEBUG
-  xbt_os_walltimer_start(timer);
-#endif
-
-  /* Stacks comparison */
-  cursor = 0;
-  int diff_local = 0;
-#ifdef MC_DEBUG
-  is_diff = 0;
-#endif
-  mc_snapshot_stack_t stack1, stack2;
-
-  while (cursor < xbt_dynar_length(s1->stacks)) {
-    stack1 =
-        (mc_snapshot_stack_t) xbt_dynar_get_as(s1->stacks, cursor,
-                                               mc_snapshot_stack_t);
-    stack2 =
-        (mc_snapshot_stack_t) xbt_dynar_get_as(s2->stacks, cursor,
-                                               mc_snapshot_stack_t);
-    diff_local =
-        compare_local_variables(s1, s2, stack1, stack2);
-    if (diff_local > 0) {
-#ifdef MC_DEBUG
-      if (is_diff == 0) {
-        xbt_os_walltimer_stop(timer);
-        mc_comp_times->stacks_comparison_time = xbt_os_timer_elapsed(timer);
-      }
-      XBT_DEBUG("(%d - %d) Different local variables between stacks %d", num1,
-                num2, cursor + 1);
-      errors++;
-      is_diff = 1;
-#else
-
-#ifdef MC_VERBOSE
-      XBT_VERB("(%d - %d) Different local variables between stacks %d", num1,
-               num2, cursor + 1);
-#endif
-
-      reset_heap_information();
-      xbt_os_walltimer_stop(timer);
-      xbt_os_timer_free(timer);
-      xbt_os_walltimer_stop(global_timer);
-      mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
-      xbt_os_timer_free(global_timer);
-
-      return 1;
-#endif
-    }
-    cursor++;
-  }
-
-
-
-  const char *names[3] = { "?", "libsimgrid", "binary" };
-#ifdef MC_DEBUG
-  double *times[3] = {
-    NULL,
-    &mc_comp_times->libsimgrid_global_variables_comparison_time,
-    &mc_comp_times->binary_global_variables_comparison_time
-  };
-#endif
-
-  int k = 0;
-  for (k = 2; k != 0; --k) {
-#ifdef MC_DEBUG
-    if (is_diff == 0)
-      xbt_os_walltimer_stop(timer);
-    xbt_os_walltimer_start(timer);
-#endif
-
-    /* Compare global variables */
-    is_diff =
-        compare_global_variables(k, s1->regions[k], s2->regions[k], s1, s2);
-    if (is_diff != 0) {
-#ifdef MC_DEBUG
-      xbt_os_walltimer_stop(timer);
-      *times[k] = xbt_os_timer_elapsed(timer);
-      XBT_DEBUG("(%d - %d) Different global variables in %s", num1, num2,
-                names[k]);
-      errors++;
-#else
-#ifdef MC_VERBOSE
-      XBT_VERB("(%d - %d) Different global variables in %s", num1, num2,
-               names[k]);
-#endif
-
-      reset_heap_information();
-      xbt_os_walltimer_stop(timer);
-      xbt_os_timer_free(timer);
-      xbt_os_walltimer_stop(global_timer);
-      mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
-      xbt_os_timer_free(global_timer);
-
-      return 1;
-#endif
-    }
-  }
-
-#ifdef MC_DEBUG
-  xbt_os_walltimer_start(timer);
-#endif
-
-  /* Compare heap */
-  if (mmalloc_compare_heap(s1, s2) > 0) {
-
-#ifdef MC_DEBUG
-    xbt_os_walltimer_stop(timer);
-    mc_comp_times->heap_comparison_time = xbt_os_timer_elapsed(timer);
-    XBT_DEBUG("(%d - %d) Different heap (mmalloc_compare)", num1, num2);
-    errors++;
-#else
-
-#ifdef MC_VERBOSE
-    XBT_VERB("(%d - %d) Different heap (mmalloc_compare)", num1, num2);
-#endif
-
-    reset_heap_information();
-    xbt_os_walltimer_stop(timer);
-    xbt_os_timer_free(timer);
-    xbt_os_walltimer_stop(global_timer);
-    mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
-    xbt_os_timer_free(global_timer);
-
-    return 1;
-#endif
-  } else {
-#ifdef MC_DEBUG
-    xbt_os_walltimer_stop(timer);
-#endif
-  }
-
-  reset_heap_information();
-
-  xbt_os_walltimer_stop(timer);
-  xbt_os_timer_free(timer);
-
-#ifdef MC_VERBOSE
-  xbt_os_walltimer_stop(global_timer);
-  mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
-#endif
-
-  xbt_os_timer_free(global_timer);
-
-#ifdef MC_DEBUG
-  print_comparison_times();
-#endif
-
-#ifdef MC_VERBOSE
-  if (errors || hash_result)
-    XBT_VERB("(%d - %d) Difference found", num1, num2);
-  else
-    XBT_VERB("(%d - %d) No difference found", num1, num2);
-#endif
-
-#if defined(MC_DEBUG) && defined(MC_VERBOSE)
-  if (_sg_mc_hash) {
-    // * false positive SHOULD be avoided.
-    // * There MUST not be any false negative.
-
-    XBT_VERB("(%d - %d) State equality hash test is %s %s", num1, num2,
-             (hash_result != 0) == (errors != 0) ? "true" : "false",
-             !hash_result ? "positive" : "negative");
-  }
-#endif
-
-  return errors > 0 || hash_result;
-
-}
-
-/***************************** Statistics *****************************/
-/*******************************************************************/
-
-void print_comparison_times()
-{
-  XBT_DEBUG("*** Comparison times ***");
-  XBT_DEBUG("- Nb processes : %f", mc_comp_times->nb_processes_comparison_time);
-  XBT_DEBUG("- Nb bytes used : %f", mc_comp_times->bytes_used_comparison_time);
-  XBT_DEBUG("- Stacks sizes : %f", mc_comp_times->stacks_sizes_comparison_time);
-  XBT_DEBUG("- Binary global variables : %f",
-            mc_comp_times->binary_global_variables_comparison_time);
-  XBT_DEBUG("- Libsimgrid global variables : %f",
-            mc_comp_times->libsimgrid_global_variables_comparison_time);
-  XBT_DEBUG("- Heap : %f", mc_comp_times->heap_comparison_time);
-  XBT_DEBUG("- Stacks : %f", mc_comp_times->stacks_comparison_time);
-}
-
-/**************************** MC snapshot compare simcall **************************/
-/***********************************************************************************/
-
-int SIMIX_pre_mc_compare_snapshots(smx_simcall_t simcall,
-                                   mc_snapshot_t s1, mc_snapshot_t s2)
-{
-  return snapshot_compare(s1, s2);
-}
-
-int MC_compare_snapshots(void *s1, void *s2)
-{
-
-  return simcall_mc_compare_snapshots(s1, s2);
-
-}