1 /* Copyright (c) 2007-2014. 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. */
8 * Debug information for the MC.
11 #ifndef SIMGRID_MC_OBJECT_INFO_H
12 #define SIMGRID_MC_OBJECT_INFO_H
18 #include <simgrid_config.h>
20 #include <xbt/dynar.h>
22 #include <elfutils/libdw.h>
24 #include "mc_forward.h"
25 #include "mc_location.h"
26 #include "mc_process.h"
27 #include "../smpi/private.h"
31 typedef int e_mc_type_type;
36 /** Represents a type in the program
38 * It is currently used to represent members of structs and unions as well.
44 Type(Type const& type) = delete;
45 Type& operator=(Type const&) = delete;
48 Dwarf_Off id; /* Offset in the section (in hexadecimal form) */
49 std::string name; /* Name of the type */
50 int byte_size; /* Size in bytes */
51 int element_count; /* Number of elements for array type */
52 std::string dw_type_id; /* DW_AT_type id */
53 xbt_dynar_t members; /* if DW_TAG_structure_type, DW_TAG_class_type, DW_TAG_union_type*/
56 // Location (for members) is either of:
57 simgrid::mc::DwarfExpression location_expression;
59 mc_type_t subtype; // DW_AT_type
60 mc_type_t full_type; // The same (but more complete) type
62 bool has_offset_location() const
64 return location_expression.size() == 1 &&
65 location_expression[0].atom == DW_OP_plus_uconst;
68 // TODO, check if this shortcut is really necessary
71 xbt_assert(this->has_offset_location());
72 return this->location_expression[0].number;
75 void offset(int new_offset)
78 op.atom = DW_OP_plus_uconst;
79 op.number = new_offset;
80 this->location_expression = { op };
89 /** Bit field of options */
90 typedef int mc_object_info_flags;
91 #define MC_OBJECT_INFO_NONE 0
92 #define MC_OBJECT_INFO_EXECUTABLE 1
97 class ObjectInformation {
100 ~ObjectInformation();
101 ObjectInformation(ObjectInformation const&) = delete;
102 ObjectInformation& operator=(ObjectInformation const&) = delete;
104 mc_object_info_flags flags;
109 char *end_exec; // Executable segment
111 char *end_rw; // Read-write segment
113 char *end_ro; // read-only segment
114 xbt_dict_t subprograms; // xbt_dict_t<origin as hexadecimal string, dw_frame_t>
115 xbt_dynar_t global_variables; // xbt_dynar_t<dw_variable_t>
116 xbt_dict_t types; // xbt_dict_t<origin as hexadecimal string, mc_type_t>
117 xbt_dict_t full_types_by_name; // xbt_dict_t<name, mc_type_t> (full defined type only)
119 // Here we sort the minimal information for an efficient (and cache-efficient)
120 // lookup of a function given an instruction pointer.
121 // The entries are sorted by low_pc and a binary search can be used to look them up.
122 xbt_dynar_t functions_index;
124 bool executable() const
126 return this->flags & MC_OBJECT_INFO_EXECUTABLE;
129 bool privatized() const
131 return this->executable() && smpi_privatize_global_variables;
134 void* base_address() const;
136 dw_frame_t find_function(const void *ip) const;
137 dw_variable_t find_variable(const char* name) const;
144 XBT_INTERNAL std::shared_ptr<s_mc_object_info_t> MC_find_object_info(
145 std::vector<simgrid::mc::VmMap> const& maps, const char* name, int executable);
146 XBT_INTERNAL void MC_post_process_object_info(mc_process_t process, mc_object_info_t info);
148 XBT_INTERNAL void MC_dwarf_get_variables(mc_object_info_t info);
149 XBT_INTERNAL void MC_dwarf_get_variables_libdw(mc_object_info_t info);
150 XBT_INTERNAL const char* MC_dwarf_attrname(int attr);
151 XBT_INTERNAL const char* MC_dwarf_tagname(int tag);
153 XBT_INTERNAL void* mc_member_resolve(const void* base, mc_type_t type, mc_type_t member, mc_address_space_t snapshot, int process_index);
155 struct s_dw_variable{
156 Dwarf_Off dwarf_offset; /* Global offset of the field. */
163 s_mc_location_list_t locations;
167 mc_object_info_t object_info;
176 s_mc_location_list_t frame_base;
177 xbt_dynar_t /* <dw_variable_t> */ variables; /* Cannot use dict, there may be several variables with the same name (in different lexical blocks)*/
178 unsigned long int id; /* DWARF offset of the subprogram */
179 xbt_dynar_t /* <dw_frame_t> */ scopes;
180 Dwarf_Off abstract_origin_id;
181 mc_object_info_t object_info;
184 struct s_mc_function_index_item {
185 void* low_pc, *high_pc;
189 XBT_INTERNAL void mc_frame_free(dw_frame_t freme);