chop, chop, chop includes

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

diff --git a/src/mc/LocationList.cpp b/src/mc/LocationList.cpp
index 03e4161..0ad9375 100644 (file)
--- a/src/mc/LocationList.cpp
+++ b/src/mc/LocationList.cpp
@@ -4,9 +4,18 @@
 /* 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 "mc_dwarf.hpp"
-#include <mc/ObjectInformation.hpp>
-#include <mc/LocationList.hpp>
+#include <cstddef>
+#include <cstdint>
+#include <utility>
+
+#include "xbt/asserts.h"
+#include "xbt/sysdep.h"
+
+#include <libunwind.h>
+
+#include "src/mc/mc_dwarf.hpp"
+#include "src/mc/ObjectInformation.hpp"
+#include "src/mc/LocationList.hpp"
 
 namespace simgrid {
 namespace dwarf {
@@ -26,13 +35,9 @@ Location resolve(
   context.object_info = object_info;
   context.process_index = process_index;
 
-  if (!expression.empty()
-      && expression[0].atom >= DW_OP_reg0
-      && expression[0].atom <= DW_OP_reg31) {
+  if (not expression.empty() && expression[0].atom >= DW_OP_reg0 && expression[0].atom <= DW_OP_reg31) {
     int dwarf_register = expression[0].atom - DW_OP_reg0;
-    xbt_assert(c,
-      "Missing frame context for register operation DW_OP_reg%i",
-      dwarf_register);
+    xbt_assert(c, "Missing frame context for register operation DW_OP_reg%i", dwarf_register);
     return Location(dwarf_register_to_libunwind(dwarf_register));
   }
 
@@ -47,7 +52,7 @@ static simgrid::dwarf::DwarfExpression const* find_expression(
 {
   for (simgrid::dwarf::LocationListEntry const& entry : locations)
     if (entry.valid_for_ip(ip))
-      return &entry.expression;
+      return &entry.expression();
   return nullptr;
 }
 
@@ -64,12 +69,46 @@ Location resolve(
     xbt_die("Could not resolve IP");
   simgrid::dwarf::DwarfExpression const* expression =
     find_expression(locations, ip);
-  if (!expression)
+  if (not expression)
     xbt_die("Could not resolve location");
   return simgrid::dwarf::resolve(
           *expression, object_info, c,
           frame_pointer_address, address_space, process_index);
 }
 
+LocationList location_list(
+  simgrid::mc::ObjectInformation& info,
+  Dwarf_Attribute& attr)
+{
+  LocationList locations;
+  std::ptrdiff_t offset = 0;
+  while (1) {
+    Dwarf_Addr base;
+    Dwarf_Addr start;
+    Dwarf_Addr end;
+    Dwarf_Op *ops;
+    std::size_t len;
+
+    offset = dwarf_getlocations(&attr, offset, &base, &start, &end, &ops, &len);
+
+    if (offset == 0)
+      break;
+    else if (offset == -1)
+      xbt_die("Error while loading location list");
+
+    std::uint64_t base_address = (std::uint64_t) info.base_address();
+
+    LocationListEntry::range_type range;
+    if (start == 0)
+      // If start == 0, this is not a location list:
+      range = { 0, UINT64_MAX };
+    else
+      range =  { base_address + start, base_address + end };
+
+    locations.push_back({ DwarfExpression(ops, ops+len), range });
+  }
+
+  return locations;
+}
+}
 }
-}
\ No newline at end of file