1 /* 2 * Copyright (C) 2016 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 #include <procinfo/process.h> 18 19 #include <fcntl.h> 20 #include <stdlib.h> 21 #include <sys/types.h> 22 #include <unistd.h> 23 24 #include <chrono> 25 #include <set> 26 #include <thread> 27 #include <vector> 28 29 #include <gtest/gtest.h> 30 31 #include <android-base/file.h> 32 #include <android-base/logging.h> 33 #include <android-base/stringprintf.h> 34 #include <android-base/unique_fd.h> 35 36 using namespace std::chrono_literals; 37 38 #if !defined(__BIONIC__) 39 #include <syscall.h> 40 static pid_t gettid() { 41 return syscall(__NR_gettid); 42 } 43 #endif 44 45 TEST(process_info, process_info_smoke) { 46 android::procinfo::ProcessInfo self; 47 ASSERT_TRUE(android::procinfo::GetProcessInfo(gettid(), &self)); 48 ASSERT_EQ(gettid(), self.tid); 49 ASSERT_EQ(getpid(), self.pid); 50 ASSERT_EQ(getppid(), self.ppid); 51 ASSERT_EQ(getuid(), self.uid); 52 ASSERT_EQ(getgid(), self.gid); 53 } 54 55 TEST(process_info, process_info_proc_pid_fd_smoke) { 56 android::procinfo::ProcessInfo self; 57 int fd = open(android::base::StringPrintf("/proc/%d", gettid()).c_str(), O_DIRECTORY | O_RDONLY); 58 ASSERT_NE(-1, fd); 59 ASSERT_TRUE(android::procinfo::GetProcessInfoFromProcPidFd(fd, &self)); 60 61 // Process name is capped at 15 bytes. 62 ASSERT_EQ("libprocinfo_tes", self.name); 63 ASSERT_EQ(gettid(), self.tid); 64 ASSERT_EQ(getpid(), self.pid); 65 ASSERT_EQ(getppid(), self.ppid); 66 ASSERT_EQ(getuid(), self.uid); 67 ASSERT_EQ(getgid(), self.gid); 68 close(fd); 69 } 70 71 TEST(process_info, process_tids_smoke) { 72 pid_t main_tid = gettid(); 73 std::thread([main_tid]() { 74 pid_t thread_tid = gettid(); 75 76 { 77 std::vector<pid_t> vec; 78 ASSERT_TRUE(android::procinfo::GetProcessTids(getpid(), &vec)); 79 ASSERT_EQ(1, std::count(vec.begin(), vec.end(), main_tid)); 80 ASSERT_EQ(1, std::count(vec.begin(), vec.end(), thread_tid)); 81 } 82 83 { 84 std::set<pid_t> set; 85 ASSERT_TRUE(android::procinfo::GetProcessTids(getpid(), &set)); 86 ASSERT_EQ(1, std::count(set.begin(), set.end(), main_tid)); 87 ASSERT_EQ(1, std::count(set.begin(), set.end(), thread_tid)); 88 } 89 }).join(); 90 } 91 92 TEST(process_info, process_state) { 93 int pipefd[2]; 94 ASSERT_EQ(0, pipe2(pipefd, O_CLOEXEC)); 95 pid_t forkpid = fork(); 96 97 ASSERT_NE(-1, forkpid); 98 if (forkpid == 0) { 99 close(pipefd[1]); 100 char buf; 101 TEMP_FAILURE_RETRY(read(pipefd[0], &buf, 1)); 102 _exit(0); 103 } 104 105 // Give the child some time to get to the read. 106 std::this_thread::sleep_for(100ms); 107 108 android::procinfo::ProcessInfo procinfo; 109 ASSERT_TRUE(android::procinfo::GetProcessInfo(forkpid, &procinfo)); 110 ASSERT_EQ(android::procinfo::kProcessStateSleeping, procinfo.state); 111 112 ASSERT_EQ(0, kill(forkpid, SIGKILL)); 113 114 // Give the kernel some time to kill the child. 115 std::this_thread::sleep_for(100ms); 116 117 ASSERT_TRUE(android::procinfo::GetProcessInfo(forkpid, &procinfo)); 118 ASSERT_EQ(android::procinfo::kProcessStateZombie, procinfo.state); 119 120 ASSERT_EQ(forkpid, waitpid(forkpid, nullptr, 0)); 121 } 122 123 static uint64_t read_uptime_secs() { 124 std::string uptime; 125 if (!android::base::ReadFileToString("/proc/uptime", &uptime)) { 126 PLOG(FATAL) << "failed to read /proc/uptime"; 127 } 128 return strtoll(uptime.c_str(), nullptr, 10); 129 } 130 131 TEST(process_info, process_start_time) { 132 uint64_t start = read_uptime_secs(); 133 int pipefd[2]; 134 ASSERT_EQ(0, pipe2(pipefd, O_CLOEXEC)); 135 136 std::this_thread::sleep_for(1000ms); 137 138 pid_t forkpid = fork(); 139 140 ASSERT_NE(-1, forkpid); 141 if (forkpid == 0) { 142 close(pipefd[1]); 143 char buf; 144 TEMP_FAILURE_RETRY(read(pipefd[0], &buf, 1)); 145 _exit(0); 146 } 147 148 std::this_thread::sleep_for(1000ms); 149 150 uint64_t end = read_uptime_secs(); 151 152 android::procinfo::ProcessInfo procinfo; 153 ASSERT_TRUE(android::procinfo::GetProcessInfo(forkpid, &procinfo)); 154 155 // starttime is measured in clock ticks: uptime is in seconds: 156 uint64_t process_start = procinfo.starttime / sysconf(_SC_CLK_TCK); 157 ASSERT_LE(start, process_start); 158 ASSERT_LE(process_start, end); 159 160 ASSERT_EQ(0, kill(forkpid, SIGKILL)); 161 ASSERT_EQ(forkpid, waitpid(forkpid, nullptr, 0)); 162 } 163 164 TEST(process_info, GetProcessInfoFromProcPidFd_set_error) { 165 TemporaryDir tmp_dir; 166 167 android::base::unique_fd dirfd(open(tmp_dir.path, O_DIRECTORY | O_RDONLY)); 168 android::procinfo::ProcessInfo procinfo; 169 std::string error; 170 171 // failed to open status file error 172 // No segfault if not given error string. 173 ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), &procinfo)); 174 // Set error when given error string. 175 ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), &procinfo, &error)); 176 ASSERT_EQ(error, "failed to open status fd in GetProcessInfoFromProcPidFd"); 177 178 // failed to parse status file error 179 std::string status_file = std::string(tmp_dir.path) + "/status"; 180 ASSERT_TRUE(android::base::WriteStringToFile("invalid data", status_file)); 181 ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), &procinfo)); 182 ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), &procinfo, &error)); 183 ASSERT_EQ(error, "failed to parse /proc/<pid>/status"); 184 185 // failed to read stat file error 186 ASSERT_TRUE(android::base::WriteStringToFile( 187 "Name:\tsh\nTgid:\t0\nPid:\t0\nTracerPid:\t0\nUid:\t0\nGid:\t0\n", status_file)); 188 ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), &procinfo)); 189 ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), &procinfo, &error)); 190 ASSERT_EQ(error, "failed to read /proc/<pid>/stat"); 191 192 // failed to parse stat file error 193 std::string stat_file = std::string(tmp_dir.path) + "/stat"; 194 ASSERT_TRUE(android::base::WriteStringToFile("2027 (sh) invalid data", stat_file)); 195 ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), &procinfo)); 196 ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), &procinfo, &error)); 197 ASSERT_EQ(error, "failed to parse /proc/<pid>/stat"); 198 } 199