-/* Copyright (c) 2004-2015. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2004-2017. The SimGrid Team. All rights reserved. */
/* 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 {
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));
}
{
for (simgrid::dwarf::LocationListEntry const& entry : locations)
if (entry.valid_for_ip(ip))
- return &entry.expression;
+ return &entry.expression();
return nullptr;
}
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