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[simgrid.git] / 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   xbt_dict_cursor_t cursor = NULL;
26   char *key;
27   mc_type_t type;
28   xbt_dict_foreach(info->types, cursor, key, type)
29     if(type->name == name)
30       return type;
31   return NULL;
32 }
33
34 static dw_frame_t find_function_by_name(mc_object_info_t info, const char* name) {
35   xbt_dict_cursor_t cursor = 0;
36   dw_frame_t subprogram;
37   char* key;
38   xbt_dict_foreach(info->subprograms, cursor, key, subprogram){
39     if(!strcmp(name, subprogram->name))
40       return subprogram;
41   }
42
43   return NULL;
44 }
45
46 static dw_variable_t find_local_variable(dw_frame_t frame, const char* argument_name) {
47   unsigned int cursor = 0;
48   dw_variable_t variable;
49   xbt_dynar_foreach(frame->variables, cursor, variable){
50     if(!strcmp(argument_name, variable->name))
51       return variable;
52   }
53
54   dw_frame_t scope = NULL;
55   xbt_dynar_foreach(frame->scopes, cursor, scope) {
56     variable = find_local_variable(scope, argument_name);
57     if(variable)
58       return variable;
59   }
60
61   return NULL;
62 }
63
64 static void test_local_variable(mc_object_info_t info, const char* function, const char* variable, void* address, unw_cursor_t* cursor) {
65   dw_frame_t subprogram = find_function_by_name(info, function);
66   assert(subprogram);
67   // TODO, Lookup frame by IP and test against name instead
68
69   dw_variable_t var = find_local_variable(subprogram, variable);
70   assert(var);
71
72   void* frame_base = mc_find_frame_base(subprogram, info, cursor);
73   s_mc_location_t location;
74
75   mc_dwarf_resolve_locations(&location,
76     &var->locations, info, cursor, frame_base, NULL, -1);
77
78   xbt_assert(mc_get_location_type(&location)==MC_LOCATION_TYPE_ADDRESS,
79     "Unexpected location type for variable %s of %s", variable, function);
80
81   xbt_assert(location.memory_location == address,
82     "Bad resolution of local variable %s of %s", variable, function);
83
84 }
85
86 static dw_variable_t test_global_variable(mc_process_t process, mc_object_info_t info, const char* name, void* address, long byte_size) {
87
88   dw_variable_t variable = info->find_variable(name);
89   xbt_assert(variable, "Global variable %s was not found", name);
90   xbt_assert(!strcmp(variable->name, name), "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", name, address, variable->address);
94
95   mc_type_t type = (mc_type_t) xbt_dict_get_or_null(process->binary_info->types, variable->type_origin);
96   xbt_assert(type!=NULL, "Missing type for %s", name);
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   assert(xbt_dict_get_or_null(process->binary_info->full_types_by_name, "struct foo"));
115 }
116
117 int main(int argc, char** argv)
118 {
119   SIMIX_global_init(&argc, argv);
120
121   dw_variable_t var;
122   mc_type_t type;
123
124   s_mc_process_t p(getpid(), -1);
125   mc_process_t 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   type = (mc_type_t) xbt_dict_get_or_null(process->binary_info->types, var->type_origin);
133   xbt_assert(type->element_count == 6*5*4, "element_count mismatch in test_some_array : %i / %i", type->element_count, 6*5*4);
134
135   var = test_global_variable(process, process->binary_info.get(),
136     "test_some_struct", &test_some_struct, sizeof(test_some_struct));
137   type = (mc_type_t) xbt_dict_get_or_null(process->binary_info->types, var->type_origin);
138   assert(find_member(process->binary_info.get(), "first", type)->offset() == 0);
139   assert(find_member(process->binary_info.get(), "second", type)->offset()
140       == ((const char*)&test_some_struct.second) - (const char*)&test_some_struct);
141
142   unw_context_t context;
143   unw_cursor_t cursor;
144   unw_getcontext(&context);
145   unw_init_local(&cursor, &context);
146
147   test_local_variable(process->binary_info.get(), "main", "argc", &argc, &cursor);
148
149   {
150     int lexical_block_variable = 50;
151     test_local_variable(process->binary_info.get(), "main",
152       "lexical_block_variable", &lexical_block_variable, &cursor);
153   }
154
155   s_foo my_foo;
156   test_type_by_name(process, my_foo);
157
158   _exit(0);
159 }