teshsuite/mc/dwarf/dwarf.cpp

   1 /* Copyright (c) 2014-2015. 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 "mc/datatypes.h"
  18 #include "mc/mc_dwarf.hpp"
  19 #include "mc/mc_private.h"
  20 #include "mc/mc_process.h"
  21
  22 #include "mc/Type.hpp"
  23 #include "mc/ObjectInformation.hpp"
  24 #include "mc/Variable.hpp"
  25
  26 int test_some_array[4][5][6];
  27 struct some_struct { int first; int second[4][5]; } test_some_struct;
  28
  29 static simgrid::mc::Type* find_type_by_name(simgrid::mc::ObjectInformation* info, const char* name)
  30 {
  31   for (auto& entry : info->types)
  32     if(entry.second.name == name)
  33       return &entry.second;
  34   return nullptr;
  35 }
  36
  37 static simgrid::mc::Frame* find_function_by_name(
  38     simgrid::mc::ObjectInformation* info, const char* name)
  39 {
  40   for (auto& entry : info->subprograms)
  41     if(entry.second.name == name)
  42       return &entry.second;
  43   return nullptr;
  44 }
  45
  46 static simgrid::mc::Variable* find_local_variable(
  47     simgrid::mc::Frame* frame, const char* argument_name)
  48 {
  49   for (simgrid::mc::Variable& variable : frame->variables)
  50     if(argument_name == variable.name)
  51       return &variable;
  52
  53   for (simgrid::mc::Frame& scope : frame->scopes) {
  54     simgrid::mc::Variable* variable = find_local_variable(
  55       &scope, argument_name);
  56     if(variable)
  57       return variable;
  58   }
  59
  60   return nullptr;
  61 }
  62
  63 static void test_local_variable(simgrid::mc::ObjectInformation* info, const char* function, const char* variable, void* address, unw_cursor_t* cursor) {
  64   simgrid::mc::Frame* subprogram = find_function_by_name(info, function);
  65   assert(subprogram);
  66   // TODO, Lookup frame by IP and test against name instead
  67
  68   simgrid::mc::Variable* var = find_local_variable(subprogram, variable);
  69   assert(var);
  70
  71   void* frame_base = mc_find_frame_base(subprogram, info, cursor);
  72   s_mc_location_t location;
  73
  74   mc_dwarf_resolve_locations(&location,
  75     &var->location_list, info, cursor, frame_base, NULL, -1);
  76
  77   xbt_assert(mc_get_location_type(&location)==MC_LOCATION_TYPE_ADDRESS,
  78     "Unexpected location type for variable %s of %s", variable, function);
  79
  80   xbt_assert(location.memory_location == address,
  81     "Bad resolution of local variable %s of %s", variable, function);
  82
  83 }
  84
  85 static simgrid::mc::Variable* test_global_variable(simgrid::mc::Process* process, simgrid::mc::ObjectInformation* info, const char* name, void* address, long byte_size) {
  86
  87   simgrid::mc::Variable* variable = info->find_variable(name);
  88   xbt_assert(variable, "Global variable %s was not found", name);
  89   xbt_assert(variable->name == name,
  90     "Name mismatch for %s", name);
  91   xbt_assert(variable->global, "Variable %s is not global", name);
  92   xbt_assert(variable->address == address,
  93       "Address mismatch for %s : %p expected but %p found",
  94       name, address, variable->address);
  95
  96   auto i = process->binary_info->types.find(variable->type_id);
  97   xbt_assert(i != process->binary_info->types.end(), "Missing type for %s", name);
  98   simgrid::mc::Type* type = &i->second;
  99   xbt_assert(type->byte_size = byte_size, "Byte size mismatch for %s", name);
 100   return variable;
 101 }
 102
 103 static simgrid::mc::Type* find_member(simgrid::mc::ObjectInformation* info, const char* name, simgrid::mc::Type* type)
 104 {
 105   for (simgrid::mc::Type& member : type->members)
 106     if(member.name == name)
 107       return &member;
 108   return nullptr;
 109 }
 110
 111 int some_local_variable = 0;
 112
 113 typedef struct foo {int i;} s_foo;
 114
 115 static void test_type_by_name(simgrid::mc::Process* process, s_foo my_foo)
 116 {
 117   assert(
 118     process->binary_info->full_types_by_name.find("struct foo") !=
 119       process->binary_info->full_types_by_name.end());
 120 }
 121
 122 int main(int argc, char** argv)
 123 {
 124   SIMIX_global_init(&argc, argv);
 125
 126   simgrid::mc::Variable* var;
 127   simgrid::mc::Type* type;
 128
 129   simgrid::mc::Process p(getpid(), -1);
 130   simgrid::mc::Process* process = &p;
 131
 132   test_global_variable(process, process->binary_info.get(),
 133     "some_local_variable", &some_local_variable, sizeof(int));
 134
 135   var = test_global_variable(process, process->binary_info.get(),
 136     "test_some_array", &test_some_array, sizeof(test_some_array));
 137   auto i = process->binary_info->types.find(var->type_id);
 138   xbt_assert(i != process->binary_info->types.end(), "Missing type");
 139   type = &i->second;
 140   xbt_assert(type->element_count == 6*5*4,
 141     "element_count mismatch in test_some_array : %i / %i",
 142     type->element_count, 6*5*4);
 143
 144   var = test_global_variable(process, process->binary_info.get(),
 145     "test_some_struct", &test_some_struct, sizeof(test_some_struct));
 146   i = process->binary_info->types.find(var->type_id);
 147   xbt_assert(i != process->binary_info->types.end(), "Missing type");
 148   type = &i->second;
 149   assert(find_member(process->binary_info.get(), "first", type)->offset() == 0);
 150   assert(find_member(process->binary_info.get(), "second", type)->offset()
 151       == ((const char*)&test_some_struct.second) - (const char*)&test_some_struct);
 152
 153   unw_context_t context;
 154   unw_cursor_t cursor;
 155   unw_getcontext(&context);
 156   unw_init_local(&cursor, &context);
 157
 158   test_local_variable(process->binary_info.get(), "main", "argc", &argc, &cursor);
 159
 160   {
 161     int lexical_block_variable = 50;
 162     test_local_variable(process->binary_info.get(), "main",
 163       "lexical_block_variable", &lexical_block_variable, &cursor);
 164   }
 165
 166   s_foo my_foo;
 167   test_type_by_name(process, my_foo);
 168
 169   _exit(0);
 170 }