1 /**
2 * Copyright (c) 2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include <signal.h>
17 #include <stdlib.h>
18 #include <stdio.h>
19 #include "gwp_asan.h"
20 #include "test.h"
21
use_after_free_handler()22 void use_after_free_handler()
23 {
24 find_and_check_file(GWP_ASAN_LOG_DIR, GWP_ASAN_LOG_TAG, "Use After Free at");
25 clear_log(GWP_ASAN_LOG_DIR, GWP_ASAN_LOG_TAG);
26 exit(0);
27 }
install_sigv_handler()28 static void install_sigv_handler()
29 {
30 struct sigaction sigv = {
31 .sa_handler = use_after_free_handler,
32 .sa_flags = 0,
33 };
34 sigaction(SIGSEGV, &sigv, NULL);
35 }
36
main()37 int main()
38 {
39 clear_log(GWP_ASAN_LOG_DIR, GWP_ASAN_LOG_TAG);
40 install_sigv_handler();
41 char *ptr = (char *)(malloc(10));
42 if (!ptr) {
43 return 0;
44 }
45 free(ptr);
46 char c = *ptr;
47 printf("c:%c", c);
48 return 0;
49 }