1 /* Copyright (c) 2014-2015. 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. */
11 #include "mc_object_info.h"
12 #include "mc_private.h"
19 static void mc_frame_free(void* frame)
21 delete (simgrid::mc::Frame*)frame;
24 static void mc_type_free(void* t)
26 delete (simgrid::mc::Type*)t;
36 this->element_count = 0;
37 this->is_pointer_type = 0;
38 this->subtype = nullptr;
39 this->full_type = nullptr;
46 this->dwarf_offset = 0;
49 this->address = nullptr;
50 this->start_scope = 0;
51 this->object_info = nullptr;
59 this->low_pc = nullptr;
60 this->high_pc = nullptr;
62 this->abstract_origin_id = 0;
63 this->object_info = nullptr;
68 ObjectInformation::ObjectInformation()
71 this->file_name = nullptr;
72 this->start = nullptr;
74 this->start_exec = nullptr;
75 this->end_exec = nullptr;
76 this->start_rw = nullptr;
77 this->end_rw = nullptr;
78 this->start_ro = nullptr;
79 this->end_ro = nullptr;
80 this->subprograms = xbt_dict_new_homogeneous(mc_frame_free);
81 this->types = xbt_dict_new_homogeneous((void (*)(void *)) mc_type_free);
82 this->full_types_by_name = xbt_dict_new_homogeneous(NULL);
83 this->functions_index = nullptr;
86 ObjectInformation::~ObjectInformation()
88 xbt_free(this->file_name);
89 xbt_dict_free(&this->subprograms);
90 xbt_dict_free(&this->types);
91 xbt_dict_free(&this->full_types_by_name);
92 xbt_dynar_free(&this->functions_index);
95 /** Find the DWARF offset for this ELF object
97 * An offset is applied to address found in DWARF:
100 * <li>for an executable obejct, addresses are virtual address
101 * (there is no offset) i.e. \f$\text{virtual address} = \{dwarf address}\f$;</li>
102 * <li>for a shared object, the addreses are offset from the begining
103 * of the shared object (the base address of the mapped shared
104 * object must be used as offset
105 * i.e. \f$\text{virtual address} = \text{shared object base address}
106 * + \text{dwarf address}\f$.</li>
109 void *ObjectInformation::base_address() const
111 if (this->executable())
114 void *result = this->start_exec;
115 if (this->start_rw != NULL && result > (void *) this->start_rw)
116 result = this->start_rw;
117 if (this->start_ro != NULL && result > (void *) this->start_ro)
118 result = this->start_ro;
122 mc_frame_t ObjectInformation::find_function(const void *ip) const
124 xbt_dynar_t dynar = this->functions_index;
125 mc_function_index_item_t base =
126 (mc_function_index_item_t) xbt_dynar_get_ptr(dynar, 0);
128 int j = xbt_dynar_length(dynar) - 1;
130 int k = i + ((j - i) / 2);
131 if (ip < base[k].low_pc) {
133 } else if (ip >= base[k].high_pc) {
136 return base[k].function;
142 simgrid::mc::Variable* ObjectInformation::find_variable(const char* name) const
144 for (simgrid::mc::Variable& variable : this->global_variables)
145 if(variable.name == name)