[mc] Add location field in struct/class-members

[simgrid.git] / src / mc / mc_checkpoint.c

diff --git a/src/mc/mc_checkpoint.c b/src/mc/mc_checkpoint.c
index 9a923b2..e72bef3 100644 (file)
--- a/src/mc/mc_checkpoint.c
+++ b/src/mc/mc_checkpoint.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2008-2013. The SimGrid Team.
+/* Copyright (c) 2008-2014. The SimGrid Team.
  * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
@@ -236,6 +236,14 @@ void MC_find_object_address(memory_map_t maps, mc_object_info_t result) {
 /************************************* Take Snapshot ************************************/
 /****************************************************************************************/
 
+static bool mc_valid_variable(dw_variable_t var, dw_frame_t frame, const void* ip) {
+  // The variable is not yet valid:
+  if((const void*)((const char*) frame->low_pc + var->start_scope) > ip)
+    return false;
+  else
+    return true;
+}
+
 static xbt_dynar_t MC_get_local_variables_values(xbt_dynar_t stack_frames){
 
   unsigned cursor1 = 0;
@@ -248,6 +256,9 @@ static xbt_dynar_t MC_get_local_variables_values(xbt_dynar_t stack_frames){
     dw_variable_t current_variable;
     xbt_dynar_foreach(stack_frame->frame->variables, cursor2, current_variable){
       
+      if(!mc_valid_variable(current_variable, stack_frame->frame, (void*) stack_frame->ip))
+        continue;
+
       int region_type;
       if((long)stack_frame->ip > (long)mc_libsimgrid_info->start_exec)
         region_type = 1;
@@ -264,9 +275,9 @@ static xbt_dynar_t MC_get_local_variables_values(xbt_dynar_t stack_frames){
       /* if(current_variable->address!=NULL) {
         new_var->address = current_variable->address;
       } else */
-      if(current_variable->location != NULL){
-        new_var->address = (void*) MC_dwarf_resolve_location(
-          &(stack_frame->unw_cursor), current_variable->location, (void*)stack_frame->frame_base);
+      if(current_variable->locations.size != 0){
+        new_var->address = (void*) mc_dwarf_resolve_locations(&current_variable->locations,
+          &(stack_frame->unw_cursor), (void*)stack_frame->frame_base, NULL);
       }
 
       xbt_dynar_push(variables, &new_var);
@@ -291,9 +302,6 @@ static xbt_dynar_t MC_unwind_stack_frames(void *stack_context) {
 
   unw_cursor_t c;
 
-  dw_frame_t test = MC_find_function_by_ip(&MC_unwind_stack_frames);
-  xbt_assert(test);
-
   int ret;
   for(ret = unw_init_local(&c, (unw_context_t *)stack_context); ret >= 0; ret = unw_step(&c)){
     mc_stack_frame_t stack_frame = xbt_new(s_mc_stack_frame_t, 1);
@@ -316,7 +324,7 @@ static xbt_dynar_t MC_unwind_stack_frames(void *stack_context) {
 
     if(frame) {
       stack_frame->frame_name = xbt_strdup(frame->name);
-      stack_frame->frame_base = (unw_word_t)mc_find_frame_base((void*)ip, frame, &c);
+      stack_frame->frame_base = (unw_word_t)mc_find_frame_base(frame, &c);
     } else {
       stack_frame->frame_base = 0;
     }
@@ -442,6 +450,47 @@ void MC_restore_snapshot(mc_snapshot_t snapshot){
 
 }
 
+void* mc_translate_address(uintptr_t addr, mc_snapshot_t snapshot) {
+
+  // If not in a process state/clone:
+  if(!snapshot) {
+    return (uintptr_t*) addr;
+  }
+
+  // If it is in a snapshot:
+  for(size_t i=0; i!=NB_REGIONS; ++i) {
+    mc_mem_region_t region = snapshot->regions[i];
+    uintptr_t start = (uintptr_t) region->start_addr;
+    uintptr_t end = start + region->size;
+
+    // The address is in this region:
+    if(addr >= start && addr < end) {
+      uintptr_t offset = addr - start;
+      return (void*) ((uintptr_t)region->data + offset);
+    }
+
+  }
+
+  // It is not in a snapshot:
+  return (void*) addr;
+}
+
+uintptr_t mc_untranslate_address(void* addr, mc_snapshot_t snapshot) {
+  if(!snapshot) {
+    return (uintptr_t) addr;
+  }
+
+  for(size_t i=0; i!=NB_REGIONS; ++i) {
+    mc_mem_region_t region = snapshot->regions[i];
+    if(addr>=region->data && addr<=region->data+region->size) {
+      size_t offset = (size_t) ((char*) addr - (char*) region->data);
+      return (uintptr_t) (region->start_addr + offset);
+    }
+  }
+
+  return (uintptr_t) addr;
+}
+
 mc_snapshot_t SIMIX_pre_mc_snapshot(smx_simcall_t simcall){
   return MC_take_snapshot(1);
 }