X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/95fb9335846db350cf78689df60bdb1a697bc033..4b6ea22affbf2fb45a2e80779c789047121ceff6:/src/mc/mc_dwarf.cpp

diff --git a/src/mc/mc_dwarf.cpp b/src/mc/mc_dwarf.cpp
index 1133efac84..ee1b4ee363 100644
--- a/src/mc/mc_dwarf.cpp
+++ b/src/mc/mc_dwarf.cpp
@@ -18,12 +18,20 @@
 #include "mc_object_info.h"
 #include "mc_private.h"
 
-extern "C" {
+static void mc_variable_free_voidp(void *t)
+{
+  delete *(simgrid::mc::Variable**)t;
+}
+
+static void mc_frame_free(void* frame)
+{
+  delete (simgrid::mc::Frame*)frame;
+}
 
-static void MC_dwarf_register_global_variable(mc_object_info_t info, dw_variable_t variable);
-static void MC_register_variable(mc_object_info_t info, dw_frame_t frame, dw_variable_t variable);
-static void MC_dwarf_register_non_global_variable(mc_object_info_t info, dw_frame_t frame, dw_variable_t variable);
-static void MC_dwarf_register_variable(mc_object_info_t info, dw_frame_t frame, dw_variable_t variable);
+static void MC_dwarf_register_global_variable(mc_object_info_t info, mc_variable_t variable);
+static void MC_register_variable(mc_object_info_t info, mc_frame_t frame, mc_variable_t variable);
+static void MC_dwarf_register_non_global_variable(mc_object_info_t info, mc_frame_t frame, mc_variable_t variable);
+static void MC_dwarf_register_variable(mc_object_info_t info, mc_frame_t frame, mc_variable_t variable);
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_dwarf, mc, "DWARF processing");
 
@@ -63,13 +71,13 @@ static uint64_t MC_dwarf_array_element_count(Dwarf_Die * die, Dwarf_Die * unit);
  *  \param frame containg frame if any
  */
 static void MC_dwarf_handle_die(mc_object_info_t info, Dwarf_Die * die,
-                                Dwarf_Die * unit, dw_frame_t frame,
+                                Dwarf_Die * unit, mc_frame_t frame,
                                 const char *ns);
 
 /** \brief Process a type DIE
  */
 static void MC_dwarf_handle_type_die(mc_object_info_t info, Dwarf_Die * die,
-                                     Dwarf_Die * unit, dw_frame_t frame,
+                                     Dwarf_Die * unit, mc_frame_t frame,
                                      const char *ns);
 
 /** \brief Calls MC_dwarf_handle_die on all childrend of the given die
@@ -80,7 +88,7 @@ static void MC_dwarf_handle_type_die(mc_object_info_t info, Dwarf_Die * die,
  *  \param frame containg frame if any
  */
 static void MC_dwarf_handle_children(mc_object_info_t info, Dwarf_Die * die,
-                                     Dwarf_Die * unit, dw_frame_t frame,
+                                     Dwarf_Die * unit, mc_frame_t frame,
                                      const char *ns);
 
 /** \brief Handle a variable (DW_TAG_variable or other)
@@ -91,7 +99,7 @@ static void MC_dwarf_handle_children(mc_object_info_t info, Dwarf_Die * die,
  *  \param frame containg frame if any
  */
 static void MC_dwarf_handle_variable_die(mc_object_info_t info, Dwarf_Die * die,
-                                         Dwarf_Die * unit, dw_frame_t frame,
+                                         Dwarf_Die * unit, mc_frame_t frame,
                                          const char *ns);
 
 /** \brief Get the DW_TAG_type of the DIE
@@ -99,37 +107,7 @@ static void MC_dwarf_handle_variable_die(mc_object_info_t info, Dwarf_Die * die,
  *  \param die DIE
  *  \return DW_TAG_type attribute as a new string (NULL if none)
  */
-static char *MC_dwarf_at_type(Dwarf_Die * die);
-
-/** \brief Get the name of an attribute (DW_AT_*) from its code
- *
- *  \param attr attribute code (see the DWARF specification)
- *  \return name of the attribute
- */
-const char *MC_dwarf_attrname(int attr)
-{
-  switch (attr) {
-#include "mc_dwarf_attrnames.h"
-  default:
-    return "DW_AT_unknown";
-  }
-}
-
-/** \brief Get the name of a dwarf tag (DW_TAG_*) from its code
- *
- *  \param tag tag code (see the DWARF specification)
- *  \return name of the tag
- */
-const char *MC_dwarf_tagname(int tag)
-{
-  switch (tag) {
-#include "mc_dwarf_tagnames.h"
-  case DW_TAG_invalid:
-    return "DW_TAG_invalid";
-  default:
-    return "DW_TAG_unknown";
-  }
-}
+static std::string MC_dwarf_at_type(Dwarf_Die * die);
 
 /** \brief A class of DWARF tags (DW_TAG_*)
  */
@@ -334,10 +312,16 @@ static Dwarf_Off MC_dwarf_attr_integrate_dieoffset(Dwarf_Die * die,
  *  \param dit the DIE
  *  \return DW_AT_type reference as a global offset in hexadecimal (or NULL)
  */
-static char *MC_dwarf_at_type(Dwarf_Die * die)
+static
+std::string MC_dwarf_at_type(Dwarf_Die * die)
 {
   Dwarf_Off offset = MC_dwarf_attr_integrate_dieoffset(die, DW_AT_type);
-  return offset == 0 ? NULL : bprintf("%" PRIx64, offset);
+  if (offset == 0)
+    return std::string();
+  char* s = bprintf("%" PRIx64, offset);
+  std::string res(s);
+  free(s);
+  return std::move(res);
 }
 
 static uint64_t MC_dwarf_attr_integrate_addr(Dwarf_Die * die, int attribute)
@@ -481,7 +465,7 @@ static uint64_t MC_dwarf_array_element_count(Dwarf_Die * die, Dwarf_Die * unit)
   return result;
 }
 
-// ***** dw_type_t
+// ***** mc_type_t
 
 /** \brief Initialize the location of a member of a type
  * (DW_AT_data_member_location of a DW_TAG_member).
@@ -490,7 +474,7 @@ static uint64_t MC_dwarf_array_element_count(Dwarf_Die * die, Dwarf_Die * unit)
  *  \param  member the member of the type
  *  \param  child  DIE of the member (DW_TAG_member)
  */
-static void MC_dwarf_fill_member_location(dw_type_t type, dw_type_t member,
+static void MC_dwarf_fill_member_location(mc_type_t type, mc_type_t member,
                                           Dwarf_Die * child)
 {
   if (dwarf_hasattr(child, DW_AT_data_bit_offset)) {
@@ -501,7 +485,8 @@ static void MC_dwarf_fill_member_location(dw_type_t type, dw_type_t member,
     if (type->type != DW_TAG_union_type) {
       xbt_die
           ("Missing DW_AT_data_member_location field in DW_TAG_member %s of type <%"
-           PRIx64 ">%s", member->name, (uint64_t) type->id, type->name);
+           PRIx64 ">%s", member->name.c_str(),
+           (uint64_t) type->id, type->name.c_str());
     } else {
       return;
     }
@@ -522,13 +507,9 @@ static void MC_dwarf_fill_member_location(dw_type_t type, dw_type_t member,
         xbt_die
             ("Could not read location expression DW_AT_data_member_location in DW_TAG_member %s of type <%"
              PRIx64 ">%s", MC_dwarf_attr_integrate_string(child, DW_AT_name),
-             (uint64_t) type->id, type->name);
-      }
-      if (len == 1 && expr[0].atom == DW_OP_plus_uconst) {
-        member->offset = expr[0].number;
-      } else {
-        mc_dwarf_expression_init(&member->location, len, expr);
+             (uint64_t) type->id, type->name.c_str());
       }
+      simgrid::mc::DwarfExpression(expr, expr+len);
       break;
     }
   case MC_DW_CLASS_CONSTANT:
@@ -536,11 +517,11 @@ static void MC_dwarf_fill_member_location(dw_type_t type, dw_type_t member,
     {
       Dwarf_Word offset;
       if (!dwarf_formudata(&attr, &offset))
-        member->offset = offset;
+        member->offset(offset);
       else
         xbt_die("Cannot get %s location <%" PRIx64 ">%s",
                 MC_dwarf_attr_integrate_string(child, DW_AT_name),
-                (uint64_t) type->id, type->name);
+                (uint64_t) type->id, type->name.c_str());
       break;
     }
   case MC_DW_CLASS_LOCLISTPTR:
@@ -558,7 +539,7 @@ static void MC_dwarf_fill_member_location(dw_type_t type, dw_type_t member,
 
 static void dw_type_free_voidp(void *t)
 {
-  dw_type_free((dw_type_t) * (void **) t);
+  delete *(mc_type_t*)t;
 }
 
 /** \brief Populate the list of members of a type
@@ -569,13 +550,11 @@ static void dw_type_free_voidp(void *t)
  *  \param type the type
  */
 static void MC_dwarf_add_members(mc_object_info_t info, Dwarf_Die * die,
-                                 Dwarf_Die * unit, dw_type_t type)
+                                 Dwarf_Die * unit, mc_type_t type)
 {
   int res;
   Dwarf_Die child;
-  xbt_assert(!type->members);
-  type->members =
-      xbt_dynar_new(sizeof(dw_type_t), (void (*)(void *)) dw_type_free_voidp);
+  xbt_assert(type->members.empty());
   for (res = dwarf_child(die, &child); res == 0;
        res = dwarf_siblingof(&child, &child)) {
     int tag = dwarf_tag(&child);
@@ -590,38 +569,33 @@ static void MC_dwarf_add_members(mc_object_info_t info, Dwarf_Die * die,
         continue;
 
       // TODO, we should use another type (because is is not a type but a member)
-      dw_type_t member = xbt_new0(s_dw_type_t, 1);
-      member->type = tag;
+      simgrid::mc::Type member;
+      member.type = tag;
 
       // Global Offset:
-      member->id = dwarf_dieoffset(&child);
+      member.id = dwarf_dieoffset(&child);
 
       const char *name = MC_dwarf_attr_integrate_string(&child, DW_AT_name);
       if (name)
-        member->name = xbt_strdup(name);
-      else
-        member->name = NULL;
-
-      member->byte_size =
+        member.name = name;
+      member.byte_size =
           MC_dwarf_attr_integrate_uint(&child, DW_AT_byte_size, 0);
-      member->element_count = -1;
-      member->dw_type_id = MC_dwarf_at_type(&child);
-      member->members = NULL;
-      member->is_pointer_type = 0;
-      member->offset = 0;
+      member.element_count = -1;
+      member.type_id = MC_dwarf_at_type(&child);
 
       if (dwarf_hasattr(&child, DW_AT_data_bit_offset)) {
         xbt_die("Can't groke DW_AT_data_bit_offset.");
       }
 
-      MC_dwarf_fill_member_location(type, member, &child);
+      MC_dwarf_fill_member_location(type, &member, &child);
 
-      if (!member->dw_type_id) {
-        xbt_die("Missing type for member %s of <%" PRIx64 ">%s", member->name,
-                (uint64_t) type->id, type->name);
+      if (member.type_id.empty()) {
+        xbt_die("Missing type for member %s of <%" PRIx64 ">%s",
+                member.name.c_str(),
+                (uint64_t) type->id, type->name.c_str());
       }
 
-      xbt_dynar_push(type->members, &member);
+      type->members.push_back(std::move(member));
     }
   }
 }
@@ -633,21 +607,15 @@ static void MC_dwarf_add_members(mc_object_info_t info, Dwarf_Die * die,
  *  \param unit compilation unit of the current DIE
  *  \return MC representation of the type
  */
-static dw_type_t MC_dwarf_die_to_type(mc_object_info_t info, Dwarf_Die * die,
-                                      Dwarf_Die * unit, dw_frame_t frame,
+static mc_type_t MC_dwarf_die_to_type(mc_object_info_t info, Dwarf_Die * die,
+                                      Dwarf_Die * unit, mc_frame_t frame,
                                       const char *ns)
 {
 
-  dw_type_t type = xbt_new0(s_dw_type_t, 1);
+  mc_type_t type = new simgrid::mc::Type();
   type->type = -1;
-  type->id = 0;
-  type->name = NULL;
-  type->byte_size = 0;
+  type->name = std::string();
   type->element_count = -1;
-  type->dw_type_id = NULL;
-  type->members = NULL;
-  type->is_pointer_type = 0;
-  type->offset = 0;
 
   type->type = dwarf_tag(die);
 
@@ -671,14 +639,15 @@ static dw_type_t MC_dwarf_die_to_type(mc_object_info_t info, Dwarf_Die * die,
 
   const char *name = MC_dwarf_attr_integrate_string(die, DW_AT_name);
   if (name != NULL) {
-    type->name =
-        ns ? bprintf("%s%s::%s", prefix, ns,
-                            name) : bprintf("%s%s", prefix, name);
+    char* full_name = ns ? bprintf("%s%s::%s", prefix, ns, name) :
+      bprintf("%s%s", prefix, name);
+    type->name = std::string(full_name);
+    free(full_name);
   }
 
-  type->dw_type_id = MC_dwarf_at_type(die);
+  type->type_id = MC_dwarf_at_type(die);
 
-  // Some compiler do not emit DW_AT_byte_size for pointer_type,
+  // Some compilers do not emit DW_AT_byte_size for pointer_type,
   // so we fill this. We currently assume that the model-checked process is in
   // the same architecture..
   if (type->type == DW_TAG_pointer_type)
@@ -712,7 +681,7 @@ static dw_type_t MC_dwarf_die_to_type(mc_object_info_t info, Dwarf_Die * die,
   case DW_TAG_union_type:
   case DW_TAG_class_type:
     MC_dwarf_add_members(info, die, unit, type);
-    char *new_ns = ns == NULL ? xbt_strdup(type->name)
+    char *new_ns = ns == NULL ? xbt_strdup(type->name.c_str())
         : bprintf("%s::%s", ns, name);
     MC_dwarf_handle_children(info, die, unit, frame, new_ns);
     free(new_ns);
@@ -723,24 +692,24 @@ static dw_type_t MC_dwarf_die_to_type(mc_object_info_t info, Dwarf_Die * die,
 }
 
 static void MC_dwarf_handle_type_die(mc_object_info_t info, Dwarf_Die * die,
-                                     Dwarf_Die * unit, dw_frame_t frame,
+                                     Dwarf_Die * unit, mc_frame_t frame,
                                      const char *ns)
 {
-  dw_type_t type = MC_dwarf_die_to_type(info, die, unit, frame, ns);
+  mc_type_t type = MC_dwarf_die_to_type(info, die, unit, frame, ns);
 
   char *key = bprintf("%" PRIx64, (uint64_t) type->id);
   xbt_dict_set(info->types, key, type, NULL);
   xbt_free(key);
 
-  if (type->name && type->byte_size != 0) {
-    xbt_dict_set(info->full_types_by_name, type->name, type, NULL);
+  if (!type->name.empty() && type->byte_size != 0) {
+    xbt_dict_set(info->full_types_by_name, type->name.c_str(), type, NULL);
   }
 }
 
 static int mc_anonymous_variable_index = 0;
 
-static dw_variable_t MC_die_to_variable(mc_object_info_t info, Dwarf_Die * die,
-                                        Dwarf_Die * unit, dw_frame_t frame,
+static mc_variable_t MC_die_to_variable(mc_object_info_t info, Dwarf_Die * die,
+                                        Dwarf_Die * unit, mc_frame_t frame,
                                         const char *ns)
 {
   // Skip declarations:
@@ -757,15 +726,15 @@ static dw_variable_t MC_die_to_variable(mc_object_info_t info, Dwarf_Die * die,
     return NULL;
   }
 
-  dw_variable_t variable = xbt_new0(s_dw_variable_t, 1);
+  simgrid::mc::Variable* variable = new simgrid::mc::Variable();
   variable->dwarf_offset = dwarf_dieoffset(die);
   variable->global = frame == NULL;     // Can be override base on DW_AT_location
   variable->object_info = info;
 
   const char *name = MC_dwarf_attr_integrate_string(die, DW_AT_name);
-  variable->name = xbt_strdup(name);
-
-  variable->type_origin = MC_dwarf_at_type(die);
+  if (name)
+    variable->name = name;
+  variable->type_id = MC_dwarf_at_type(die);
 
   int form = dwarf_whatform(&attr_location);
   int klass =
@@ -779,19 +748,22 @@ static dw_variable_t MC_die_to_variable(mc_object_info_t info, Dwarf_Die * die,
       Dwarf_Op *expr;
       size_t len;
       if (dwarf_getlocation(&attr_location, &expr, &len)) {
-        xbt_die
-            ("Could not read location expression in DW_AT_location of variable <%"
-             PRIx64 ">%s", (uint64_t) variable->dwarf_offset, variable->name);
+        xbt_die(
+          "Could not read location expression in DW_AT_location "
+          "of variable <%" PRIx64 ">%s",
+          (uint64_t) variable->dwarf_offset,
+          variable->name.c_str());
       }
 
       if (len == 1 && expr[0].atom == DW_OP_addr) {
         variable->global = 1;
         uintptr_t offset = (uintptr_t) expr[0].number;
-        uintptr_t base = (uintptr_t) MC_object_base_address(info);
+        uintptr_t base = (uintptr_t) info->base_address();
         variable->address = (void *) (base + offset);
       } else {
-        mc_dwarf_location_list_init_from_expression(&variable->locations, len,
-                                                    expr);
+        simgrid::mc::LocationListEntry entry;
+        entry.expression = {expr, expr + len};
+        variable->location_list = { std::move(entry) };
       }
 
       break;
@@ -799,13 +771,16 @@ static dw_variable_t MC_die_to_variable(mc_object_info_t info, Dwarf_Die * die,
   case MC_DW_CLASS_LOCLISTPTR:
   case MC_DW_CLASS_CONSTANT:
     // Reference to location list:
-    mc_dwarf_location_list_init(&variable->locations, info, die,
-                                &attr_location);
+    mc_dwarf_location_list_init(
+      &variable->location_list, info, die,
+      &attr_location);
     break;
   default:
-    xbt_die("Unexpected form 0x%x (%i), class 0x%x (%i) list for location in <%"
-            PRIx64 ">%s", form, form, klass, klass,
-            (uint64_t) variable->dwarf_offset, variable->name);
+    xbt_die("Unexpected form 0x%x (%i), class 0x%x (%i) list for location "
+            "in <%" PRIx64 ">%s",
+            form, form, klass, klass,
+            (uint64_t) variable->dwarf_offset,
+            variable->name.c_str());
   }
 
   // Handle start_scope:
@@ -830,39 +805,32 @@ static dw_variable_t MC_die_to_variable(mc_object_info_t info, Dwarf_Die * die,
     }
   }
 
-  if (ns && variable->global) {
-    char *old_name = variable->name;
-    variable->name = bprintf("%s::%s", ns, old_name);
-    free(old_name);
-  }
+  if (ns && variable->global)
+    variable->name =
+      std::string(ns) + "::" + variable->name;
+
   // The current code needs a variable name,
   // generate a fake one:
-  if (!variable->name) {
-    variable->name = bprintf("@anonymous#%i", mc_anonymous_variable_index++);
-  }
+  if (variable->name.empty())
+    variable->name =
+      "@anonymous#" + std::to_string(mc_anonymous_variable_index++);
 
   return variable;
 }
 
 static void MC_dwarf_handle_variable_die(mc_object_info_t info, Dwarf_Die * die,
-                                         Dwarf_Die * unit, dw_frame_t frame,
+                                         Dwarf_Die * unit, mc_frame_t frame,
                                          const char *ns)
 {
-  dw_variable_t variable =
+  mc_variable_t variable =
       MC_die_to_variable(info, die, unit, frame, ns);
   if (variable == NULL)
     return;
   MC_dwarf_register_variable(info, frame, variable);
 }
 
-static void mc_frame_free_voipd(dw_frame_t * p)
-{
-  mc_frame_free(*p);
-  *p = NULL;
-}
-
 static void MC_dwarf_handle_scope_die(mc_object_info_t info, Dwarf_Die * die,
-                                      Dwarf_Die * unit, dw_frame_t parent_frame,
+                                      Dwarf_Die * unit, mc_frame_t parent_frame,
                                       const char *ns)
 {
   // TODO, handle DW_TAG_type/DW_TAG_location for DW_TAG_with_stmt
@@ -877,7 +845,7 @@ static void MC_dwarf_handle_scope_die(mc_object_info_t info, Dwarf_Die * die,
   if (klass == mc_tag_scope)
     xbt_assert(parent_frame, "No parent scope for this scope");
 
-  dw_frame_t frame = xbt_new0(s_dw_frame_t, 1);
+  mc_frame_t frame = new simgrid::mc::Frame();
 
   frame->tag = tag;
   frame->id = dwarf_dieoffset(die);
@@ -885,8 +853,10 @@ static void MC_dwarf_handle_scope_die(mc_object_info_t info, Dwarf_Die * die,
 
   if (klass == mc_tag_subprogram) {
     const char *name = MC_dwarf_attr_integrate_string(die, DW_AT_name);
-    frame->name =
-        ns ? bprintf("%s::%s", ns, name) : xbt_strdup(name);
+    if(ns)
+      frame->name  = std::string(ns) + "::" + name;
+    else
+      frame->name = name;
   }
 
   frame->abstract_origin_id =
@@ -895,11 +865,7 @@ static void MC_dwarf_handle_scope_die(mc_object_info_t info, Dwarf_Die * die,
   // This is the base address for DWARF addresses.
   // Relocated addresses are offset from this base address.
   // See DWARF4 spec 7.5
-  void *base = MC_object_base_address(info);
-
-  // Variables are filled in the (recursive) call of MC_dwarf_handle_children:
-  frame->variables =
-      xbt_dynar_new(sizeof(dw_variable_t), dw_variable_free_voidp);
+  void *base = info->base_address();
 
   // TODO, support DW_AT_ranges
   uint64_t low_pc = MC_dwarf_attr_integrate_addr(die, DW_AT_low_pc);
@@ -944,9 +910,6 @@ static void MC_dwarf_handle_scope_die(mc_object_info_t info, Dwarf_Die * die,
                                   &attr_frame_base);
   }
 
-  frame->scopes =
-      xbt_dynar_new(sizeof(dw_frame_t), (void_f_pvoid_t) mc_frame_free_voipd);
-
   // Register it:
   if (klass == mc_tag_subprogram) {
     char *key = bprintf("%" PRIx64, (uint64_t) frame->id);
@@ -961,7 +924,7 @@ static void MC_dwarf_handle_scope_die(mc_object_info_t info, Dwarf_Die * die,
 
 static void mc_dwarf_handle_namespace_die(mc_object_info_t info,
                                           Dwarf_Die * die, Dwarf_Die * unit,
-                                          dw_frame_t frame,
+                                          mc_frame_t frame,
                                           const char *ns)
 {
   const char *name = MC_dwarf_attr_integrate_string(die, DW_AT_name);
@@ -974,7 +937,7 @@ static void mc_dwarf_handle_namespace_die(mc_object_info_t info,
 }
 
 static void MC_dwarf_handle_children(mc_object_info_t info, Dwarf_Die * die,
-                                     Dwarf_Die * unit, dw_frame_t frame,
+                                     Dwarf_Die * unit, mc_frame_t frame,
                                      const char *ns)
 {
   // For each child DIE:
@@ -987,7 +950,7 @@ static void MC_dwarf_handle_children(mc_object_info_t info, Dwarf_Die * die,
 }
 
 static void MC_dwarf_handle_die(mc_object_info_t info, Dwarf_Die * die,
-                                Dwarf_Die * unit, dw_frame_t frame,
+                                Dwarf_Die * unit, mc_frame_t frame,
                                 const char *ns)
 {
   int tag = dwarf_tag(die);
@@ -1062,82 +1025,78 @@ void MC_dwarf_get_variables(mc_object_info_t info)
 
 /************************** Free functions *************************/
 
-void mc_frame_free(dw_frame_t frame)
+static void dw_type_free(mc_type_t t)
 {
-  xbt_free(frame->name);
-  mc_dwarf_location_list_clear(&(frame->frame_base));
-  xbt_dynar_free(&(frame->variables));
-  xbt_dynar_free(&(frame->scopes));
-  xbt_free(frame);
+  delete t;
 }
 
-void dw_type_free(dw_type_t t)
-{
-  xbt_free(t->name);
-  xbt_free(t->dw_type_id);
-  xbt_dynar_free(&(t->members));
-  mc_dwarf_expression_clear(&t->location);
-  xbt_free(t);
-}
+// ***** object_info
 
-void dw_variable_free(dw_variable_t v)
-{
-  if (v) {
-    xbt_free(v->name);
-    xbt_free(v->type_origin);
+namespace simgrid {
+namespace mc {
 
-    if (v->locations.locations)
-      mc_dwarf_location_list_clear(&v->locations);
-    xbt_free(v);
-  }
+ObjectInformation::ObjectInformation()
+{
+  this->flags = 0;
+  this->file_name = nullptr;
+  this->start = nullptr;
+  this->end = nullptr;
+  this->start_exec = nullptr;
+  this->end_exec = nullptr;
+  this->start_rw = nullptr;
+  this->end_rw = nullptr;
+  this->start_ro = nullptr;
+  this->end_ro = nullptr;
+  this->subprograms = xbt_dict_new_homogeneous(mc_frame_free);
+  this->global_variables =
+      xbt_dynar_new(sizeof(mc_variable_t), mc_variable_free_voidp);
+  this->types = xbt_dict_new_homogeneous((void (*)(void *)) dw_type_free);
+  this->full_types_by_name = xbt_dict_new_homogeneous(NULL);
+  this->functions_index = nullptr;
 }
 
-void dw_variable_free_voidp(void *t)
+ObjectInformation::~ObjectInformation()
 {
-  dw_variable_free((dw_variable_t) * (void **) t);
+  xbt_free(this->file_name);
+  xbt_dict_free(&this->subprograms);
+  xbt_dynar_free(&this->global_variables);
+  xbt_dict_free(&this->types);
+  xbt_dict_free(&this->full_types_by_name);
+  xbt_dynar_free(&this->functions_index);
 }
 
-// ***** object_info
-
-
-
-mc_object_info_t MC_new_object_info(void)
+/** Find the DWARF offset for this ELF object
+ *
+ *  An offset is applied to address found in DWARF:
+ *
+ *  <ul>
+ *    <li>for an executable obejct, addresses are virtual address
+ *        (there is no offset) i.e. \f$\text{virtual address} = \{dwarf address}\f$;</li>
+ *    <li>for a shared object, the addreses are offset from the begining
+ *        of the shared object (the base address of the mapped shared
+ *        object must be used as offset
+ *        i.e. \f$\text{virtual address} = \text{shared object base address}
+ *             + \text{dwarf address}\f$.</li>
+ *
+ */
+void *ObjectInformation::base_address() const
 {
-  mc_object_info_t res = xbt_new0(s_mc_object_info_t, 1);
-  res->subprograms = xbt_dict_new_homogeneous((void (*)(void *)) mc_frame_free);
-  res->global_variables =
-      xbt_dynar_new(sizeof(dw_variable_t), dw_variable_free_voidp);
-  res->types = xbt_dict_new_homogeneous((void (*)(void *)) dw_type_free);
-  res->full_types_by_name = xbt_dict_new_homogeneous(NULL);
-  return res;
+  if (this->executable())
+    return nullptr;
+
+  void *result = this->start_exec;
+  if (this->start_rw != NULL && result > (void *) this->start_rw)
+    result = this->start_rw;
+  if (this->start_ro != NULL && result > (void *) this->start_ro)
+    result = this->start_ro;
+  return result;
 }
 
-void MC_free_object_info(mc_object_info_t * info)
-{
-  xbt_free(&(*info)->file_name);
-  xbt_dict_free(&(*info)->subprograms);
-  xbt_dynar_free(&(*info)->global_variables);
-  xbt_dict_free(&(*info)->types);
-  xbt_dict_free(&(*info)->full_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)
-{
-  if (info->flags & MC_OBJECT_INFO_EXECUTABLE)
-    return 0;
-  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,
@@ -1156,7 +1115,7 @@ 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;
+  mc_frame_t frame = NULL;
   xbt_dict_cursor_t cursor;
   char *key;
   xbt_dict_foreach(info->subprograms, cursor, key, frame) {
@@ -1184,38 +1143,36 @@ static void MC_make_functions_index(mc_object_info_t 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 = (dw_type_t) xbt_dict_get_or_null(info->types, variable->type_origin);
-    }
-  }
+  mc_variable_t variable = nullptr;
+  xbt_dynar_foreach(info->global_variables, cursor, variable)
+    if (!variable->type_id.empty())
+      variable->type = (mc_type_t) xbt_dict_get_or_null(
+        info->types, variable->type_id.c_str());
 }
 
-static void mc_post_process_scope(mc_object_info_t info, dw_frame_t scope)
+static void mc_post_process_scope(mc_object_info_t info, mc_frame_t scope)
 {
 
   if (scope->tag == DW_TAG_inlined_subroutine) {
 
     // Attach correct namespaced name in inlined subroutine:
     char *key = bprintf("%" PRIx64, (uint64_t) scope->abstract_origin_id);
-    dw_frame_t abstract_origin = (dw_frame_t) xbt_dict_get_or_null(info->subprograms, key);
+    mc_frame_t abstract_origin = (mc_frame_t) xbt_dict_get_or_null(info->subprograms, key);
     xbt_assert(abstract_origin, "Could not lookup abstract origin %s", key);
     xbt_free(key);
-    scope->name = xbt_strdup(abstract_origin->name);
-
+    scope->name = abstract_origin->name;
   }
+
   // Direct:
   unsigned cursor = 0;
-  dw_variable_t variable = NULL;
-  xbt_dynar_foreach(scope->variables, cursor, variable) {
-    if (variable->type_origin) {
-      variable->type = (dw_type_t) xbt_dict_get_or_null(info->types, variable->type_origin);
-    }
-  }
+  mc_variable_t variable = nullptr;
+  xbt_dynar_foreach(scope->variables, cursor, variable)
+    if (!variable->type_id.empty())
+      variable->type = (mc_type_t) xbt_dict_get_or_null(
+        info->types, variable->type_id.c_str());
 
   // Recursive post-processing of nested-scopes:
-  dw_frame_t nested_scope = NULL;
+  mc_frame_t nested_scope = nullptr;
   xbt_dynar_foreach(scope->scopes, cursor, nested_scope)
       mc_post_process_scope(info, nested_scope);
 
@@ -1225,7 +1182,7 @@ static void MC_post_process_functions(mc_object_info_t info)
 {
   xbt_dict_cursor_t cursor;
   char *key;
-  dw_frame_t subprogram = NULL;
+  mc_frame_t subprogram = NULL;
   xbt_dict_foreach(info->subprograms, cursor, key, subprogram) {
     mc_post_process_scope(info, subprogram);
   }
@@ -1234,23 +1191,25 @@ static void MC_post_process_functions(mc_object_info_t info)
 
 /** \brief Fill/lookup the "subtype" field.
  */
-static void MC_resolve_subtype(mc_object_info_t info, dw_type_t type)
+static void MC_resolve_subtype(mc_object_info_t info, mc_type_t type)
 {
 
-  if (type->dw_type_id == NULL)
+  if (type->type_id.empty())
     return;
-  type->subtype = (dw_type_t) xbt_dict_get_or_null(info->types, type->dw_type_id);
+  type->subtype = (mc_type_t) xbt_dict_get_or_null(
+    info->types, type->type_id.c_str());
   if (type->subtype == NULL)
     return;
   if (type->subtype->byte_size != 0)
     return;
-  if (type->subtype->name == NULL)
+  if (type->subtype->name.empty())
     return;
   // Try to find a more complete description of the type:
   // We need to fix in order to support C++.
 
-  dw_type_t subtype =
-    (dw_type_t) xbt_dict_get_or_null(info->full_types_by_name, type->subtype->name);
+  mc_type_t subtype =
+    (mc_type_t) xbt_dict_get_or_null(
+      info->full_types_by_name, type->subtype->name.c_str());
   if (subtype != NULL) {
     type->subtype = subtype;
   }
@@ -1261,41 +1220,37 @@ static void MC_post_process_types(mc_object_info_t info)
 {
   xbt_dict_cursor_t cursor = NULL;
   char *origin;
-  dw_type_t type;
+  mc_type_t type;
 
   // Lookup "subtype" field:
   xbt_dict_foreach(info->types, cursor, origin, type) {
     MC_resolve_subtype(info, type);
-
-    dw_type_t member;
-    unsigned int i = 0;
-    if (type->members != NULL)
-      xbt_dynar_foreach(type->members, i, member) {
-      MC_resolve_subtype(info, member);
-      }
+    for (simgrid::mc::Type& member : type->members)
+      MC_resolve_subtype(info, &member);
   }
 }
 
 /** \brief Finds informations about a given shared object/executable */
-mc_object_info_t MC_find_object_info(memory_map_t maps, const char *name,
-                                     int executable)
+std::shared_ptr<s_mc_object_info_t> MC_find_object_info(
+  std::vector<simgrid::mc::VmMap> const& maps, const char *name, int executable)
 {
-  mc_object_info_t result = MC_new_object_info();
+  std::shared_ptr<s_mc_object_info_t> result =
+    std::make_shared<s_mc_object_info_t>();
   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;
+  MC_find_object_address(maps, result.get());
+  MC_dwarf_get_variables(result.get());
+  MC_post_process_types(result.get());
+  MC_post_process_variables(result.get());
+  MC_post_process_functions(result.get());
+  MC_make_functions_index(result.get());
+  return std::move(result);
 }
 
 /*************************************************************************/
 
-static int MC_dwarf_get_variable_index(xbt_dynar_t variables, char *var,
+static int MC_dwarf_get_variable_index(xbt_dynar_t variables, const char *var,
                                        void *address)
 {
 
@@ -1305,15 +1260,15 @@ static int MC_dwarf_get_variable_index(xbt_dynar_t variables, char *var,
   unsigned int cursor = 0;
   int start = 0;
   int end = xbt_dynar_length(variables) - 1;
-  dw_variable_t var_test = NULL;
+  mc_variable_t var_test = NULL;
 
   while (start <= end) {
     cursor = (start + end) / 2;
     var_test =
-        (dw_variable_t) xbt_dynar_get_as(variables, cursor, dw_variable_t);
-    if (strcmp(var_test->name, var) < 0) {
+        (mc_variable_t) xbt_dynar_get_as(variables, cursor, mc_variable_t);
+    if (strcmp(var_test->name.c_str(), var) < 0) {
       start = cursor + 1;
-    } else if (strcmp(var_test->name, var) > 0) {
+    } else if (strcmp(var_test->name.c_str(), var) > 0) {
       end = cursor - 1;
     } else {
       if (address) {            /* global variable */
@@ -1329,12 +1284,12 @@ static int MC_dwarf_get_variable_index(xbt_dynar_t variables, char *var,
     }
   }
 
-  if (strcmp(var_test->name, var) == 0) {
+  if (strcmp(var_test->name.c_str(), var) == 0) {
     if (address && var_test->address < address)
       return cursor + 1;
     else
       return cursor;
-  } else if (strcmp(var_test->name, var) < 0)
+  } else if (strcmp(var_test->name.c_str(), var) < 0)
     return cursor + 1;
   else
     return cursor;
@@ -1342,30 +1297,32 @@ static int MC_dwarf_get_variable_index(xbt_dynar_t variables, char *var,
 }
 
 void MC_dwarf_register_global_variable(mc_object_info_t info,
-                                       dw_variable_t variable)
+                                       mc_variable_t variable)
 {
   int index =
-      MC_dwarf_get_variable_index(info->global_variables, variable->name,
-                                  variable->address);
+      MC_dwarf_get_variable_index(info->global_variables,
+        variable->name.c_str(),
+        variable->address);
   if (index != -1)
     xbt_dynar_insert_at(info->global_variables, index, &variable);
   // TODO, else ?
 }
 
 void MC_dwarf_register_non_global_variable(mc_object_info_t info,
-                                           dw_frame_t frame,
-                                           dw_variable_t variable)
+                                           mc_frame_t frame,
+                                           mc_variable_t variable)
 {
   xbt_assert(frame, "Frame is NULL");
   int index =
-      MC_dwarf_get_variable_index(frame->variables, variable->name, NULL);
+      MC_dwarf_get_variable_index(
+        frame->variables, variable->name.c_str(), NULL);
   if (index != -1)
     xbt_dynar_insert_at(frame->variables, index, &variable);
   // TODO, else ?
 }
 
-void MC_dwarf_register_variable(mc_object_info_t info, dw_frame_t frame,
-                                dw_variable_t variable)
+void MC_dwarf_register_variable(mc_object_info_t info, mc_frame_t frame,
+                                mc_variable_t variable)
 {
   if (variable->global)
     MC_dwarf_register_global_variable(info, variable);
@@ -1379,10 +1336,10 @@ void MC_post_process_object_info(mc_process_t process, mc_object_info_t info)
 {
   xbt_dict_cursor_t cursor = NULL;
   char *key = NULL;
-  dw_type_t type = NULL;
+  mc_type_t type = NULL;
   xbt_dict_foreach(info->types, cursor, key, type) {
 
-    dw_type_t subtype = type;
+    mc_type_t subtype = type;
     while (subtype->type == DW_TAG_typedef || subtype->type == DW_TAG_volatile_type
       || subtype->type == DW_TAG_const_type) {
       if (subtype->subtype)
@@ -1392,12 +1349,12 @@ void MC_post_process_object_info(mc_process_t process, mc_object_info_t info)
     }
 
     // Resolve full_type:
-    if (subtype->name && subtype->byte_size == 0) {
-      for (size_t i = 0; i != process->object_infos_size; ++i) {
-        dw_type_t same_type = (dw_type_t)
-            xbt_dict_get_or_null(process->object_infos[i]->full_types_by_name,
-                                 subtype->name);
-        if (same_type && same_type->name && same_type->byte_size) {
+    if (!subtype->name.empty() && subtype->byte_size == 0) {
+      for (auto const& object_info : process->object_infos) {
+        mc_type_t same_type = (mc_type_t)
+            xbt_dict_get_or_null(object_info->full_types_by_name,
+                                 subtype->name.c_str());
+        if (same_type && !same_type->name.empty() && same_type->byte_size) {
           type->full_type = same_type;
           break;
         }
@@ -1406,5 +1363,3 @@ void MC_post_process_object_info(mc_process_t process, mc_object_info_t info)
 
   }
 }
-
-}