teshsuite/mc/dwarf/dwarf.c

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