1 /* Copyright (c) 2014-2021. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
12 #include "mc/datatypes.h"
13 #include "src/mc/mc_private.hpp"
15 #include "src/mc/inspect/ObjectInformation.hpp"
16 #include "src/mc/inspect/Type.hpp"
17 #include "src/mc/inspect/Variable.hpp"
18 #include "src/mc/remote/RemoteProcess.hpp"
23 #include <elfutils/version.h>
24 #if _ELFUTILS_VERSION < 171
25 // Elder elfutils/libdw broken with multi-dimensional arrays. See https://sourceware.org/bugzilla/show_bug.cgi?id=22546
26 int test_some_array[4 * 5 * 6];
28 int test_some_array[4][5][6];
35 some_struct test_some_struct;
37 static simgrid::mc::Frame* find_function_by_name(
38 simgrid::mc::ObjectInformation* info, const char* name)
40 for (auto& entry : info->subprograms)
41 if(entry.second.name == name)
46 static simgrid::mc::Variable* find_local_variable(
47 simgrid::mc::Frame* frame, const char* argument_name)
49 for (simgrid::mc::Variable& variable : frame->variables)
50 if(argument_name == variable.name)
53 for (simgrid::mc::Frame& scope : frame->scopes) {
54 simgrid::mc::Variable* variable = find_local_variable(
55 &scope, argument_name);
63 static void test_local_variable(simgrid::mc::ObjectInformation* info, const char* function, const char* variable,
64 const void* address, unw_cursor_t* cursor)
66 simgrid::mc::Frame* subprogram = find_function_by_name(info, function);
68 // TODO, Lookup frame by IP and test against name instead
70 const simgrid::mc::Variable* var = find_local_variable(subprogram, variable);
73 void* frame_base = subprogram->frame_base(*cursor);
74 simgrid::dwarf::Location location = simgrid::dwarf::resolve(var->location_list, info, cursor, frame_base, nullptr);
76 xbt_assert(location.in_memory(), "Expected the variable %s of function %s to be in memory", variable, function);
77 xbt_assert(location.address() == address, "Bad resolution of local variable %s of %s", variable, function);
80 static const simgrid::mc::Variable* test_global_variable(const simgrid::mc::RemoteProcess& process,
81 simgrid::mc::ObjectInformation* info, const char* name,
82 void* address, long byte_size)
84 const simgrid::mc::Variable* variable = info->find_variable(name);
85 xbt_assert(variable, "Global variable %s was not found", name);
86 xbt_assert(variable->name == name, "Name mismatch for %s", name);
87 xbt_assert(variable->global, "Variable %s is not global", name);
88 xbt_assert(variable->address == address, "Address mismatch for %s : %p expected but %p found", name, address,
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 const simgrid::mc::Type* type = &i->second;
94 xbt_assert(type->byte_size == byte_size, "Byte size mismatch for %s", name);
98 static simgrid::mc::Member* find_member(simgrid::mc::Type& type, const char* name)
100 for (simgrid::mc::Member& member : type.members)
101 if(member.name == name)
106 int some_local_variable = 0;
112 static void test_type_by_name(const simgrid::mc::RemoteProcess& process, s_foo /*my_foo*/)
114 assert(process.binary_info->full_types_by_name.find("struct s_foo") != process.binary_info->full_types_by_name.end());
117 int main(int argc, char** argv)
119 SIMIX_global_init(&argc, argv);
121 const simgrid::mc::Variable* var;
122 simgrid::mc::Type* type;
124 simgrid::mc::RemoteProcess process(getpid());
125 process.init(nullptr, nullptr, nullptr, nullptr);
127 test_global_variable(process, process.binary_info.get(), "some_local_variable", &some_local_variable, sizeof(int));
129 var = test_global_variable(process, process.binary_info.get(), "test_some_array", &test_some_array,
130 sizeof(test_some_array));
131 auto i = process.binary_info->types.find(var->type_id);
132 xbt_assert(i != process.binary_info->types.end(), "Missing type");
134 xbt_assert(type->element_count == 6 * 5 * 4, "element_count mismatch in test_some_array : %i / %i",
135 type->element_count, 6 * 5 * 4);
137 var = test_global_variable(process, process.binary_info.get(), "test_some_struct", &test_some_struct,
138 sizeof(test_some_struct));
139 i = process.binary_info->types.find(var->type_id);
140 xbt_assert(i != process.binary_info->types.end(), "Missing type");
144 assert(find_member(*type, "first")->offset() == 0);
145 assert(find_member(*type, "second")->offset() ==
146 ((const char*)&test_some_struct.second) - (const char*)&test_some_struct);
148 unw_context_t context;
150 unw_getcontext(&context);
151 unw_init_local(&cursor, &context);
153 test_local_variable(process.binary_info.get(), "main", "argc", &argc, &cursor);
155 int lexical_block_variable = 50;
156 test_local_variable(process.binary_info.get(), "main", "lexical_block_variable", &lexical_block_variable, &cursor);
159 test_type_by_name(process, my_foo);