1 /*
2 * Copyright (C) 2017 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 #ifndef _LIBUNWINDSTACK_TESTS_TEST_UTILS_H
18 #define _LIBUNWINDSTACK_TESTS_TEST_UTILS_H
19
20 #include <signal.h>
21 #include <sys/ptrace.h>
22 #include <sys/types.h>
23 #include <sys/wait.h>
24 #include <unistd.h>
25
26 namespace unwindstack {
27
28 class TestScopedPidReaper {
29 public:
TestScopedPidReaper(pid_t pid)30 TestScopedPidReaper(pid_t pid) : pid_(pid) {}
~TestScopedPidReaper()31 ~TestScopedPidReaper() {
32 kill(pid_, SIGKILL);
33 waitpid(pid_, nullptr, 0);
34 }
35
36 private:
37 pid_t pid_;
38 };
39
TestQuiescePid(pid_t pid)40 inline bool TestQuiescePid(pid_t pid) {
41 siginfo_t si;
42 bool ready = false;
43 // Wait for up to 5 seconds.
44 for (size_t i = 0; i < 5000; i++) {
45 if (ptrace(PTRACE_GETSIGINFO, pid, 0, &si) == 0) {
46 ready = true;
47 break;
48 }
49 usleep(1000);
50 }
51 return ready;
52 }
53
TestAttach(pid_t pid)54 inline bool TestAttach(pid_t pid) {
55 if (ptrace(PTRACE_ATTACH, pid, 0, 0) == -1) {
56 return false;
57 }
58
59 return TestQuiescePid(pid);
60 }
61
TestDetach(pid_t pid)62 inline bool TestDetach(pid_t pid) {
63 return ptrace(PTRACE_DETACH, pid, 0, 0) == 0;
64 }
65
66 void TestCheckForLeaks(void (*unwind_func)(void*), void* data);
67
68 } // namespace unwindstack
69
70 #endif // _LIBUNWINDSTACK_TESTS_TEST_UTILS_H
71