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