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 25 namespace unwindstack { 26 27 class TestScopedPidReaper { 28 public: 29 TestScopedPidReaper(pid_t pid) : pid_(pid) {} 30 ~TestScopedPidReaper() { 31 kill(pid_, SIGKILL); 32 waitpid(pid_, nullptr, 0); 33 } 34 35 private: 36 pid_t pid_; 37 }; 38 39 inline bool TestQuiescePid(pid_t pid) { 40 siginfo_t si; 41 bool ready = false; 42 // Wait for up to 5 seconds. 43 for (size_t i = 0; i < 5000; i++) { 44 if (ptrace(PTRACE_GETSIGINFO, pid, 0, &si) == 0) { 45 ready = true; 46 break; 47 } 48 usleep(1000); 49 } 50 return ready; 51 } 52 53 } // namespace unwindstack 54 55 #endif // _LIBUNWINDSTACK_TESTS_TEST_UTILS_H 56
