1 /**
2 * Copyright (c) 2025 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 /**
17 * Currently,musl malloc/free hooks may introduce risks to GWP_ASan's memory management. This TEST aim to
18 * enhance libc-test by adding GWP_ASan test case for proactive monitoring.
19 */
20
21 #include <signal.h>
22 #include <stdio.h>
23 #include <sys/wait.h>
24 #include "gwp_asan_test.h"
25 #include "test.h"
26
handler(void)27 void handler(void)
28 {
29 t_error("Under the condition of memory hooks, GWP_ASan is encountering errors during usage.\n");
30 _exit(1);
31 }
32
install_sigv_handler(void)33 void install_sigv_handler(void)
34 {
35 struct sigaction sigv = {
36 .sa_handler = handler,
37 .sa_flags = 0,
38 };
39 sigaction(SIGSEGV, &sigv, NULL);
40 }
41
enable_hook_test(void)42 void enable_hook_test(void)
43 {
44 config_gwp_asan_environment(true);
45 clear_log(GWP_ASAN_LOG_DIR, GWP_ASAN_LOG_TAG);
46 install_sigv_handler();
47
48 void *ptr = malloc(20);
49 if (!ptr) {
50 t_error("malloc failed.");
51 return;
52 }
53 if (!libc_gwp_asan_ptr_is_mine(ptr)) {
54 t_error("Memory is not allocated by gwp_asan.\n");
55 return;
56 }
57 // send signal 36 to self process and enable memory hook.
58 send_sig36();
59
60 free(ptr);
61 }
62
main(void)63 int main(void)
64 {
65 pid_t pid = fork();
66 if (pid < 0) {
67 t_error("FAIL fork failed.");
68 } else if (pid == 0) { // child process
69 enable_hook_test();
70 } else { // parent process
71 int status;
72 if (waitpid(pid, &status, 0) != pid) {
73 t_error("gwp_asan_enable_hook_test waitpid failed.\n");
74 }
75
76 if (WIFEXITED(status) && WEXITSTATUS(status) != 0) {
77 t_error("gwp_asan_enable_hook_test failed.\n");
78 }
79
80 cancel_gwp_asan_environment(true);
81 }
82
83 return t_status;
84 }
85