1/*
2 * Copyright 2008 Google Inc.
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#include <stdlib.h>
17
18#if UNIT_TESTING
19extern void* _test_malloc(const size_t size, const char* file, const int line);
20extern void* _test_calloc(const size_t number_of_elements, const size_t size,
21                          const char* file, const int line);
22extern void _test_free(void* const ptr, const char* file, const int line);
23
24#define malloc(size) _test_malloc(size, __FILE__, __LINE__)
25#define calloc(num, size) _test_calloc(num, size, __FILE__, __LINE__)
26#define free(ptr) _test_free(ptr, __FILE__, __LINE__)
27#endif // UNIT_TESTING
28
29void leak_memory() {
30    int * const temporary = (int*)malloc(sizeof(int));
31    *temporary = 0;
32}
33
34void buffer_overflow() {
35    char * const memory = (char*)malloc(sizeof(int));
36    memory[sizeof(int)] = '!';
37    free(memory);
38}
39
40void buffer_underflow() {
41    char * const memory = (char*)malloc(sizeof(int));
42    memory[-1] = '!';
43    free(memory);
44}
45