1 /* Copyright (c) 2004-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #ifndef SIMGRID_MC_OBJECT_LOCATION_H
8 #define SIMGRID_MC_OBJECT_LOCATION_H
14 #include <libunwind.h>
16 #include <elfutils/libdw.h>
19 #include <xbt/range.hpp>
21 #include "src/mc/mc_base.h"
22 #include "src/mc/mc_forward.hpp"
23 #include "src/mc/DwarfExpression.hpp"
28 /** A DWARF expression with optional validity constraints */
29 class LocationListEntry {
31 typedef simgrid::xbt::Range<std::uint64_t> range_type;
33 DwarfExpression expression_;
34 // By default, the expression is always valid:
35 range_type range_ = {0, UINT64_MAX};
37 LocationListEntry() {}
38 LocationListEntry(DwarfExpression expression, range_type range)
39 : expression_(std::move(expression)), range_(range)
41 LocationListEntry(DwarfExpression expression)
42 : expression_(std::move(expression)), range_({0, UINT64_MAX})
45 DwarfExpression& expression()
49 DwarfExpression const& expression() const
53 bool valid_for_ip(unw_word_t ip) const
55 return range_.contain(ip);
59 typedef std::vector<LocationListEntry> LocationList;
61 /** Location of some variable in memory
63 * The variable is located either in memory of a register.
70 Location(void* x) :memory_(x) {}
71 Location(int register_id) :
72 memory_(nullptr), register_id_(register_id) {}
74 bool in_register() const { return memory_ == nullptr; }
75 bool in_memory() const { return memory_ != nullptr; }
78 void* address() const { return memory_; }
79 int register_id() const { return register_id_; }
84 simgrid::dwarf::DwarfExpression const& expression,
85 simgrid::mc::ObjectInformation* object_info, unw_cursor_t* c,
86 void* frame_pointer_address, simgrid::mc::AddressSpace* address_space,
90 simgrid::dwarf::LocationList const& locations,
91 simgrid::mc::ObjectInformation* object_info,
93 void *frame_pointer_address,
94 simgrid::mc::AddressSpace* address_space,
98 simgrid::dwarf::LocationList location_list(
99 simgrid::mc::ObjectInformation& info,
100 Dwarf_Attribute& attr);