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.
43 Type(Type const& type) = default;
44 Type& operator=(Type const&) = default;
45 Type(Type&& type) = default;
46 Type& operator=(Type&&) = default;
49 Dwarf_Off id; /* Offset in the section (in hexadecimal form) */
50 std::string name; /* Name of the type */
51 int byte_size; /* Size in bytes */
52 int element_count; /* Number of elements for array type */
53 std::string type_id; /* DW_AT_type id */
54 std::vector<Type> members; /* if DW_TAG_structure_type, DW_TAG_class_type, DW_TAG_union_type*/
57 // Location (for members) is either of:
58 simgrid::mc::DwarfExpression location_expression;
60 mc_type_t subtype; // DW_AT_type
61 mc_type_t full_type; // The same (but more complete) type
63 bool has_offset_location() const
65 return location_expression.size() == 1 &&
66 location_expression[0].atom == DW_OP_plus_uconst;
69 // TODO, check if this shortcut is really necessary
72 xbt_assert(this->has_offset_location());
73 return this->location_expression[0].number;
76 void offset(int new_offset)
79 op.atom = DW_OP_plus_uconst;
80 op.number = new_offset;
81 this->location_expression = { op };
90 /** Bit field of options */
91 typedef int mc_object_info_flags;
92 #define MC_OBJECT_INFO_NONE 0
93 #define MC_OBJECT_INFO_EXECUTABLE 1
98 class ObjectInformation {
101 ~ObjectInformation();
102 ObjectInformation(ObjectInformation const&) = delete;
103 ObjectInformation& operator=(ObjectInformation const&) = delete;
105 mc_object_info_flags flags;
110 char *end_exec; // Executable segment
112 char *end_rw; // Read-write segment
114 char *end_ro; // read-only segment
115 xbt_dict_t subprograms; // xbt_dict_t<origin as hexadecimal string, mc_frame_t>
116 xbt_dynar_t global_variables; // xbt_dynar_t<mc_variable_t>
117 xbt_dict_t types; // xbt_dict_t<origin as hexadecimal string, mc_type_t>
118 xbt_dict_t full_types_by_name; // xbt_dict_t<name, mc_type_t> (full defined type only)
120 // Here we sort the minimal information for an efficient (and cache-efficient)
121 // lookup of a function given an instruction pointer.
122 // The entries are sorted by low_pc and a binary search can be used to look them up.
123 xbt_dynar_t functions_index;
125 bool executable() const
127 return this->flags & MC_OBJECT_INFO_EXECUTABLE;
130 bool privatized() const
132 return this->executable() && smpi_privatize_global_variables;
135 void* base_address() const;
137 mc_frame_t find_function(const void *ip) const;
138 mc_variable_t find_variable(const char* name) const;
145 XBT_INTERNAL std::shared_ptr<s_mc_object_info_t> MC_find_object_info(
146 std::vector<simgrid::mc::VmMap> const& maps, const char* name, int executable);
147 XBT_INTERNAL void MC_post_process_object_info(mc_process_t process, mc_object_info_t info);
149 XBT_INTERNAL void MC_dwarf_get_variables(mc_object_info_t info);
150 XBT_INTERNAL void MC_dwarf_get_variables_libdw(mc_object_info_t info);
151 XBT_INTERNAL const char* MC_dwarf_attrname(int attr);
152 XBT_INTERNAL const char* MC_dwarf_tagname(int tag);
154 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);
163 Variable(Variable const&) = delete;
164 Variable& operator=(Variable const&) = delete;
166 Dwarf_Off dwarf_offset; /* Global offset of the field. */
173 s_mc_location_list_t location_list;
177 mc_object_info_t object_info;
185 Frame(Frame const&) = delete;
186 Frame& operator=(Frame&) = delete;
192 s_mc_location_list_t frame_base;
193 xbt_dynar_t /* <mc_variable_t> */ variables; /* Cannot use dict, there may be several variables with the same name (in different lexical blocks)*/
194 unsigned long int id; /* DWARF offset of the subprogram */
195 xbt_dynar_t /* <mc_frame_t> */ scopes;
196 Dwarf_Off abstract_origin_id;
197 mc_object_info_t object_info;
205 struct s_mc_function_index_item {
206 void* low_pc, *high_pc;