[mc] Move mc_dwarf_location_list_init() into namespace

[simgrid.git] / src / mc / mc_dwarf.cpp

diff --git a/src/mc/mc_dwarf.cpp b/src/mc/mc_dwarf.cpp
index 90fd3d6..eeb6a36 100644 (file)
--- a/src/mc/mc_dwarf.cpp
+++ b/src/mc/mc_dwarf.cpp
@@ -517,7 +517,7 @@ static void MC_dwarf_fill_member_location(
             ("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.c_str());
-      member->location_expression = simgrid::mc::DwarfExpression(expr, expr+len);
+      member->location_expression = simgrid::dwarf::DwarfExpression(expr, expr+len);
       break;
     }
   case simgrid::dwarf::FormClass::Constant:
@@ -753,7 +753,7 @@ static std::unique_ptr<simgrid::mc::Variable> MC_die_to_variable(
         uintptr_t base = (uintptr_t) info->base_address();
         variable->address = (void *) (base + offset);
       } else {
-        simgrid::mc::LocationListEntry entry;
+        simgrid::dwarf::LocationListEntry entry;
         entry.expression = {expr, expr + len};
         variable->location_list = { std::move(entry) };
       }
@@ -764,9 +764,8 @@ static std::unique_ptr<simgrid::mc::Variable> MC_die_to_variable(
   case simgrid::dwarf::FormClass::LocListPtr:
   case simgrid::dwarf::FormClass::Constant:
     // Reference to location list:
-    mc_dwarf_location_list_init(
-      &variable->location_list, info, die,
-      &attr_location);
+    variable->location_list = simgrid::dwarf::location_list(
+      *info, attr_location);
     break;
 
   default:
@@ -909,8 +908,8 @@ static void MC_dwarf_handle_scope_die(simgrid::mc::ObjectInformation* info, Dwar
   if (klass == simgrid::dwarf::TagClass::Subprogram) {
     Dwarf_Attribute attr_frame_base;
     if (dwarf_attr_integrate(die, DW_AT_frame_base, &attr_frame_base))
-      mc_dwarf_location_list_init(&frame.frame_base, info, die,
-                                  &attr_frame_base);
+      frame.frame_base_location = simgrid::dwarf::location_list(*info,
+                                  attr_frame_base);
   }
 
   // Handle children:
@@ -1197,3 +1196,80 @@ void MC_post_process_object_info(simgrid::mc::Process* process, simgrid::mc::Obj
 
   }
 }
+
+namespace simgrid {
+namespace dwarf {
+
+/** Convert a DWARF register into a libunwind register
+ *
+ *  DWARF and libunwind does not use the same convention for numbering the
+ *  registers on some architectures. The function makes the necessary
+ *  convertion.
+ */
+int dwarf_register_to_libunwind(int dwarf_register)
+{
+#if defined(__x86_64__)
+  // It seems for this arch, DWARF and libunwind agree in the numbering:
+  return dwarf_register;
+#elif defined(__i386__)
+  // Could't find the authoritative source of information for this.
+  // This is inspired from http://source.winehq.org/source/dlls/dbghelp/cpu_i386.c#L517.
+  switch (dwarf_register) {
+  case 0:
+    return UNW_X86_EAX;
+  case 1:
+    return UNW_X86_ECX;
+  case 2:
+    return UNW_X86_EDX;
+  case 3:
+    return UNW_X86_EBX;
+  case 4:
+    return UNW_X86_ESP;
+  case 5:
+    return UNW_X86_EBP;
+  case 6:
+    return UNW_X86_ESI;
+  case 7:
+    return UNW_X86_EDI;
+  case 8:
+    return UNW_X86_EIP;
+  case 9:
+    return UNW_X86_EFLAGS;
+  case 10:
+    return UNW_X86_CS;
+  case 11:
+    return UNW_X86_SS;
+  case 12:
+    return UNW_X86_DS;
+  case 13:
+    return UNW_X86_ES;
+  case 14:
+    return UNW_X86_FS;
+  case 15:
+    return UNW_X86_GS;
+  case 16:
+    return UNW_X86_ST0;
+  case 17:
+    return UNW_X86_ST1;
+  case 18:
+    return UNW_X86_ST2;
+  case 19:
+    return UNW_X86_ST3;
+  case 20:
+    return UNW_X86_ST4;
+  case 21:
+    return UNW_X86_ST5;
+  case 22:
+    return UNW_X86_ST6;
+  case 23:
+    return UNW_X86_ST7;
+  default:
+    xbt_die("Bad/unknown register number.");
+  }
+#else
+#error This architecture is not supported yet for DWARF expression evaluation.
+#endif
+}
+
+}
+}
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