X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/eb3ad7bf1f83d355e938a83cf02f78bc898eefbb..7ef55d47978f2f2ef20bd27c85881faa99147034:/src/mc/mc_global.c

diff --git a/src/mc/mc_global.c b/src/mc/mc_global.c
index 78049adec6..ceee7f9732 100644
--- a/src/mc/mc_global.c
+++ b/src/mc/mc_global.c
@@ -34,6 +34,8 @@ int _sg_mc_hash=0;
 int _sg_mc_max_depth=1000;
 int _sg_mc_visited=0;
 char *_sg_mc_dot_output_file = NULL;
+int _sg_mc_comms_determinism=0;
+int _sg_mc_send_determinism=0;
 
 int user_max_depth_reached = 0;
 
@@ -99,6 +101,20 @@ void _mc_cfg_cb_dot_output(const char *name, int pos) {
   _sg_mc_dot_output_file= xbt_cfg_get_string(_sg_cfg_set, name);
 }
 
+void _mc_cfg_cb_comms_determinism(const char *name, int pos) {
+  if (_sg_cfg_init_status && !_sg_do_model_check) {
+    xbt_die("You are specifying a value to enable/disable the detection of determinism in the communications schemes after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
+  }
+  _sg_mc_comms_determinism= xbt_cfg_get_boolean(_sg_cfg_set, name);
+}
+
+void _mc_cfg_cb_send_determinism(const char *name, int pos) {
+  if (_sg_cfg_init_status && !_sg_do_model_check) {
+    xbt_die("You are specifying a value to enable/disable the detection of send-determinism in the communications schemes after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
+  }
+  _sg_mc_send_determinism= xbt_cfg_get_boolean(_sg_cfg_set, name);
+}
+
 /* MC global data structures */
 mc_state_t mc_current_state = NULL;
 char mc_replay_mode = FALSE;
@@ -179,7 +195,7 @@ void dw_variable_free_voidp(void *t){
   dw_variable_free((dw_variable_t) * (void **) t);
 }
 
-// object_info
+// ***** object_info
 
 mc_object_info_t MC_new_object_info(void) {
   mc_object_info_t res = xbt_new0(s_mc_object_info_t, 1);
@@ -190,6 +206,7 @@ mc_object_info_t MC_new_object_info(void) {
   return res;
 }
 
+
 void MC_free_object_info(mc_object_info_t* info) {
   xbt_free(&(*info)->file_name);
   xbt_dict_free(&(*info)->local_variables);
@@ -197,9 +214,136 @@ void MC_free_object_info(mc_object_info_t* info) {
   xbt_dict_free(&(*info)->types);
   xbt_dict_free(&(*info)->types_by_name);
   xbt_free(info);
+  xbt_dynar_free(&(*info)->functions_index);
   *info = NULL;
 }
 
+// ***** Helpers
+
+void* MC_object_base_address(mc_object_info_t info) {
+  void* result = info->start_exec;
+  if(info->start_rw!=NULL && result > (void*) info->start_rw) result = info->start_rw;
+  if(info->start_ro!=NULL && result > (void*) info->start_ro) result = info->start_ro;
+  return result;
+}
+
+// ***** Functions index
+
+static int MC_compare_frame_index_items(mc_function_index_item_t a, mc_function_index_item_t b) {
+  if(a->low_pc < b->low_pc)
+    return -1;
+  else if(a->low_pc == b->low_pc)
+    return 0;
+  else
+    return 1;
+}
+
+static void MC_make_functions_index(mc_object_info_t info) {
+  xbt_dynar_t index = xbt_dynar_new(sizeof(s_mc_function_index_item_t), NULL);
+
+  // Populate the array:
+  dw_frame_t frame = NULL;
+  xbt_dict_cursor_t cursor = NULL;
+  const char* name = NULL;
+  xbt_dict_foreach(info->local_variables, cursor, name, frame) {
+    if(frame->low_pc==NULL)
+      continue;
+    s_mc_function_index_item_t entry;
+    entry.low_pc = frame->low_pc;
+    entry.high_pc = frame->high_pc;
+    entry.function = frame;
+    xbt_dynar_push(index, &entry);
+  }
+
+  mc_function_index_item_t base = (mc_function_index_item_t) xbt_dynar_get_ptr(index, 0);
+
+  // Sort the array by low_pc:
+  qsort(base,
+    xbt_dynar_length(index),
+    sizeof(s_mc_function_index_item_t),
+    (int (*)(const void *, const void *))MC_compare_frame_index_items);
+
+  info->functions_index = index;
+}
+
+mc_object_info_t MC_ip_find_object_info(void* ip) {
+  mc_object_info_t infos[2] = { mc_binary_info, mc_libsimgrid_info };
+  size_t n = 2;
+  size_t i;
+  for(i=0; i!=n; ++i) {
+    if(ip >= (void*)infos[i]->start_exec && ip <= (void*)infos[i]->end_exec) {
+      return infos[i];
+    }
+  }
+  return NULL;
+}
+
+static dw_frame_t MC_find_function_by_ip_and_object(void* ip, mc_object_info_t info) {
+  xbt_dynar_t dynar = info->functions_index;
+  mc_function_index_item_t base = (mc_function_index_item_t) xbt_dynar_get_ptr(dynar, 0);
+  int i = 0;
+  int j = xbt_dynar_length(dynar) - 1;
+  while(j>=i) {
+    int k = i + ((j-i)/2);
+    if(ip < base[k].low_pc) {
+      j = k-1;
+    } else if(ip > base[k].high_pc) {
+      i = k+1;
+    } else {
+      return base[k].function;
+    }
+  }
+  return NULL;
+}
+
+dw_frame_t MC_find_function_by_ip(void* ip) {
+  mc_object_info_t info = MC_ip_find_object_info(ip);
+  if(info==NULL)
+    return NULL;
+  else
+    return MC_find_function_by_ip_and_object(ip, info);
+}
+
+static void MC_post_process_variables(mc_object_info_t info) {
+  unsigned cursor = 0;
+  dw_variable_t variable = NULL;
+  xbt_dynar_foreach(info->global_variables, cursor, variable) {
+    if(variable->type_origin) {
+      variable->type = xbt_dict_get_or_null(info->types, variable->type_origin);
+    }
+  }
+}
+
+static void MC_post_process_functions(mc_object_info_t info) {
+  xbt_dict_cursor_t cursor = NULL;
+  char* key = NULL;
+  dw_frame_t function = NULL;
+  xbt_dict_foreach(info->local_variables, cursor, key, function) {
+    unsigned cursor2 = 0;
+    dw_variable_t variable = NULL;
+    xbt_dynar_foreach(function->variables, cursor2, variable) {
+      if(variable->type_origin) {
+        variable->type = xbt_dict_get_or_null(info->types, variable->type_origin);
+      }
+    }
+  }
+}
+
+/** \brief Finds informations about a given shared object/executable */
+mc_object_info_t MC_find_object_info(memory_map_t maps, char* name, int executable) {
+  mc_object_info_t result = MC_new_object_info();
+  if(executable)
+    result->flags |= MC_OBJECT_INFO_EXECUTABLE;
+  result->file_name = xbt_strdup(name);
+  MC_find_object_address(maps, result);
+  MC_dwarf_get_variables(result);
+  MC_post_process_types(result);
+  MC_post_process_variables(result);
+  MC_post_process_functions(result);
+  MC_make_functions_index(result);
+  return result;
+}
+
 /*************************************************************************/
 
 static dw_location_t MC_dwarf_get_location(xbt_dict_t location_list, char *expr){
@@ -768,15 +912,30 @@ void MC_ignore(void *addr, size_t size){
 /*******************************  Initialisation of MC *******************************/
 /*********************************************************************************/
 
-static void MC_init_debug_info();
-static void MC_init_debug_info() {
+static void MC_post_process_object_info(mc_object_info_t info) {
+  mc_object_info_t other_info = info == mc_binary_info ? mc_libsimgrid_info : mc_binary_info;
+  xbt_dict_cursor_t cursor = NULL;
+  char* key = NULL;
+  dw_type_t type = NULL;
+  xbt_dict_foreach(info->types, cursor, key, type){
+    if(type->name && type->byte_size == 0) {
+      type->other_object_same_type = xbt_dict_get_or_null(other_info->types_by_name, type->name);
+    }
+  }
+}
+
+static void MC_init_debug_info(void) {
   XBT_INFO("Get debug information ...");
 
   memory_map_t maps = MC_get_memory_map();
 
   /* Get local variables for state equality detection */
-  mc_binary_info = MC_find_object_info(maps, xbt_binary_name);
-  mc_libsimgrid_info = MC_find_object_info(maps, libsimgrid_path);
+  mc_binary_info = MC_find_object_info(maps, xbt_binary_name, 1);
+  mc_libsimgrid_info = MC_find_object_info(maps, libsimgrid_path, 0);
+
+  // Use information of the other objects:
+  MC_post_process_object_info(mc_binary_info);
+  MC_post_process_object_info(mc_libsimgrid_info);
 
   MC_free_memory_map(maps);
   XBT_INFO("Get debug information done !");
@@ -811,12 +970,14 @@ void MC_init(){
   MC_ignore_local_variable("_throw_ctx", "*");
   MC_ignore_local_variable("ctx", "*");
 
+  MC_ignore_local_variable("self", "simcall_BODY_mc_snapshot");
   MC_ignore_local_variable("next_context", "smx_ctx_sysv_suspend_serial");
   MC_ignore_local_variable("i", "smx_ctx_sysv_suspend_serial");
 
   /* Ignore local variable about time used for tracing */
   MC_ignore_local_variable("start_time", "*"); 
 
+  MC_ignore_global_variable("compared_pointers");
   MC_ignore_global_variable("mc_comp_times");
   MC_ignore_global_variable("mc_snapshot_comparison_time"); 
   MC_ignore_global_variable("mc_time");
@@ -1096,7 +1257,8 @@ void MC_replay(xbt_fifo_t stack, int start)
       xbt_free(key);
     }
   }
-  xbt_dynar_reset(communications_pattern);
+  if(_sg_mc_comms_determinism || _sg_mc_send_determinism)
+    xbt_dynar_reset(communications_pattern);
   MC_UNSET_RAW_MEM;
   
 
@@ -1127,20 +1289,23 @@ void MC_replay(xbt_fifo_t stack, int start)
       }
     }
 
-    if(req->call == SIMCALL_COMM_ISEND)
-      comm_pattern = 1;
-    else if(req->call == SIMCALL_COMM_IRECV)
+    if(_sg_mc_comms_determinism || _sg_mc_send_determinism){
+      if(req->call == SIMCALL_COMM_ISEND)
+        comm_pattern = 1;
+      else if(req->call == SIMCALL_COMM_IRECV)
       comm_pattern = 2;
-    
+    }
+
     SIMIX_simcall_pre(req, value);
 
-    MC_SET_RAW_MEM;
-    if(comm_pattern != 0){
-      get_comm_pattern(communications_pattern, req, comm_pattern);
+    if(_sg_mc_comms_determinism || _sg_mc_send_determinism){
+      MC_SET_RAW_MEM;
+      if(comm_pattern != 0){
+        get_comm_pattern(communications_pattern, req, comm_pattern);
+      }
+      MC_UNSET_RAW_MEM;
+      comm_pattern = 0;
     }
-    MC_UNSET_RAW_MEM;
-
-    comm_pattern = 0;
     
     MC_wait_for_requests();
 
@@ -1423,8 +1588,10 @@ void MC_print_statistics(mc_stats_t stats)
     fclose(dot_output);
   }
   if(initial_state_safety != NULL){
-    // XBT_INFO("Communication-deterministic : %s", !initial_state_safety->comm_deterministic ? "No" : "Yes");
-    // XBT_INFO("Send-deterministic : %s", !initial_state_safety->send_deterministic ? "No" : "Yes");
+    if(_sg_mc_comms_determinism)
+      XBT_INFO("Communication-deterministic : %s", !initial_state_safety->comm_deterministic ? "No" : "Yes");
+    if (_sg_mc_send_determinism)
+      XBT_INFO("Send-deterministic : %s", !initial_state_safety->send_deterministic ? "No" : "Yes");
   }
   MC_UNSET_RAW_MEM;
 }