1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdint.h>
18
19#include <gtest/gtest.h>
20
21#define UNW_LOCAL_ONLY
22#include <libunwind.h>
23
24#define EXTRA_CONTEXT_BYTES 1024
25
26TEST(libbacktrace, getcontext_size) {
27  unw_context_t* context;
28  context = reinterpret_cast<unw_context_t*>(malloc(sizeof(unw_context_t) + EXTRA_CONTEXT_BYTES));
29  ASSERT_TRUE(context != NULL);
30  uint8_t* extra = reinterpret_cast<uint8_t*>(reinterpret_cast<uintptr_t>(context) + sizeof(unw_context_t));
31  for (size_t i = 0; i < EXTRA_CONTEXT_BYTES; i++) {
32    extra[i] = (i % 255) + 1;
33  }
34  ASSERT_TRUE(unw_getcontext(context) == 0);
35  /* Check that nothing was written past the end of the structure. */
36  for (size_t i = 0; i < EXTRA_CONTEXT_BYTES; i++) {
37    ASSERT_EQ((i % 255) + 1, extra[i]);
38  }
39
40  free(context);
41}
42