teshsuite/mc/dwarf/dwarf.cpp

   1 /* Copyright (c) 2014. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   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. */
   6
   7 #ifdef NDEBUG
   8 #undef NDEBUG
   9 #endif
  10
  11 #include <string.h>
  12 #include <assert.h>
  13
  14 #include <xbt.h>
  15 #include <mc/mc.h>
  16
  17 #include "../../src/include/mc/datatypes.h"
  18 #include "../../src/mc/mc_object_info.h"
  19 #include "../../src/mc/mc_private.h"
  20
  21 int test_some_array[4][5][6];
  22 struct some_struct { int first; int second[4][5]; } test_some_struct;
  23
  24 static mc_type_t find_type_by_name(mc_object_info_t info, const char* name)
  25 {
  26   for (auto& entry : info->types)
  27     if(entry.second.name == name)
  28       return &entry.second;
  29   return nullptr;
  30 }
  31
  32 static mc_frame_t find_function_by_name(
  33     mc_object_info_t info, const char* name)
  34 {
  35   xbt_dict_cursor_t cursor = 0;
  36   mc_frame_t subprogram;
  37   char* key;
  38   xbt_dict_foreach(info->subprograms, cursor, key, subprogram)
  39     if(subprogram->name == name)
  40       return subprogram;
  41   return nullptr;
  42 }
  43
  44 static mc_variable_t find_local_variable(
  45     mc_frame_t frame, const char* argument_name)
  46 {
  47   for (simgrid::mc::Variable& variable : frame->variables)
  48     if(argument_name == variable.name)
  49       return &variable;
  50
  51   for (simgrid::mc::Frame& scope : frame->scopes) {
  52     simgrid::mc::Variable* variable = find_local_variable(
  53       &scope, argument_name);
  54     if(variable)
  55       return variable;
  56   }
  57
  58   return nullptr;
  59 }
  60
  61 static void test_local_variable(mc_object_info_t info, const char* function, const char* variable, void* address, unw_cursor_t* cursor) {
  62   mc_frame_t subprogram = find_function_by_name(info, function);
  63   assert(subprogram);
  64   // TODO, Lookup frame by IP and test against name instead
  65
  66   mc_variable_t var = find_local_variable(subprogram, variable);
  67   assert(var);
  68
  69   void* frame_base = mc_find_frame_base(subprogram, info, cursor);
  70   s_mc_location_t location;
  71
  72   mc_dwarf_resolve_locations(&location,
  73     &var->location_list, info, cursor, frame_base, NULL, -1);
  74
  75   xbt_assert(mc_get_location_type(&location)==MC_LOCATION_TYPE_ADDRESS,
  76     "Unexpected location type for variable %s of %s", variable, function);
  77
  78   xbt_assert(location.memory_location == address,
  79     "Bad resolution of local variable %s of %s", variable, function);
  80
  81 }
  82
  83 static mc_variable_t test_global_variable(mc_process_t process, mc_object_info_t info, const char* name, void* address, long byte_size) {
  84
  85   mc_variable_t variable = info->find_variable(name);
  86   xbt_assert(variable, "Global variable %s was not found", name);
  87   xbt_assert(variable->name == name,
  88     "Name mismatch for %s", name);
  89   xbt_assert(variable->global, "Variable %s is not global", name);
  90   xbt_assert(variable->address == address,
  91       "Address mismatch for %s : %p expected but %p found",
  92       name, address, variable->address);
  93
  94   auto i = process->binary_info->types.find(variable->type_id);
  95   xbt_assert(i != process->binary_info->types.end(), "Missing type for %s", name);
  96   mc_type_t type = &i->second;
  97   xbt_assert(type->byte_size = byte_size, "Byte size mismatch for %s", name);
  98   return variable;
  99 }
 100
 101 static mc_type_t find_member(mc_object_info_t info, const char* name, mc_type_t type)
 102 {
 103   for (simgrid::mc::Type& member : type->members)
 104     if(member.name == name)
 105       return &member;
 106   return nullptr;
 107 }
 108
 109 int some_local_variable = 0;
 110
 111 typedef struct foo {int i;} s_foo;
 112
 113 static void test_type_by_name(mc_process_t process, s_foo my_foo)
 114 {
 115   assert(
 116     process->binary_info->full_types_by_name.find("struct foo") !=
 117       process->binary_info->full_types_by_name.end());
 118 }
 119
 120 int main(int argc, char** argv)
 121 {
 122   SIMIX_global_init(&argc, argv);
 123
 124   mc_variable_t var;
 125   mc_type_t type;
 126
 127   s_mc_process_t p(getpid(), -1);
 128   mc_process_t process = &p;
 129
 130   test_global_variable(process, process->binary_info.get(),
 131     "some_local_variable", &some_local_variable, sizeof(int));
 132
 133   var = test_global_variable(process, process->binary_info.get(),
 134     "test_some_array", &test_some_array, sizeof(test_some_array));
 135   auto i = process->binary_info->types.find(var->type_id);
 136   xbt_assert(i != process->binary_info->types.end(), "Missing type");
 137   type = &i->second;
 138   xbt_assert(type->element_count == 6*5*4,
 139     "element_count mismatch in test_some_array : %i / %i",
 140     type->element_count, 6*5*4);
 141
 142   var = test_global_variable(process, process->binary_info.get(),
 143     "test_some_struct", &test_some_struct, sizeof(test_some_struct));
 144   i = process->binary_info->types.find(var->type_id);
 145   xbt_assert(i != process->binary_info->types.end(), "Missing type");
 146   type = &i->second;
 147   assert(find_member(process->binary_info.get(), "first", type)->offset() == 0);
 148   assert(find_member(process->binary_info.get(), "second", type)->offset()
 149       == ((const char*)&test_some_struct.second) - (const char*)&test_some_struct);
 150
 151   unw_context_t context;
 152   unw_cursor_t cursor;
 153   unw_getcontext(&context);
 154   unw_init_local(&cursor, &context);
 155
 156   test_local_variable(process->binary_info.get(), "main", "argc", &argc, &cursor);
 157
 158   {
 159     int lexical_block_variable = 50;
 160     test_local_variable(process->binary_info.get(), "main",
 161       "lexical_block_variable", &lexical_block_variable, &cursor);
 162   }
 163
 164   s_foo my_foo;
 165   test_type_by_name(process, my_foo);
 166
 167   _exit(0);
 168 }