Josh Gao | 788a35d | 2016-10-28 15:23:25 -0700 | [diff] [blame] | 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 | |
Josh Gao | 8a1b53c | 2017-06-27 14:06:19 -0700 | [diff] [blame] | 24 | #include <chrono> |
Josh Gao | 788a35d | 2016-10-28 15:23:25 -0700 | [diff] [blame] | 25 | #include <set> |
| 26 | #include <thread> |
| 27 | #include <vector> |
| 28 | |
| 29 | #include <gtest/gtest.h> |
| 30 | |
Yabin Cui | 3dbe823 | 2021-05-18 15:36:53 -0700 | [diff] [blame] | 31 | #include <android-base/file.h> |
Josh Gao | 67887fe | 2021-03-01 23:02:54 -0800 | [diff] [blame] | 32 | #include <android-base/logging.h> |
Josh Gao | 788a35d | 2016-10-28 15:23:25 -0700 | [diff] [blame] | 33 | #include <android-base/stringprintf.h> |
Yabin Cui | 3dbe823 | 2021-05-18 15:36:53 -0700 | [diff] [blame] | 34 | #include <android-base/unique_fd.h> |
Josh Gao | 788a35d | 2016-10-28 15:23:25 -0700 | [diff] [blame] | 35 | |
Josh Gao | 8a1b53c | 2017-06-27 14:06:19 -0700 | [diff] [blame] | 36 | using namespace std::chrono_literals; |
| 37 | |
Colin Cross | a4a14a3 | 2022-02-02 16:39:44 -0800 | [diff] [blame] | 38 | #if defined(__GLIBC__) |
Josh Gao | 788a35d | 2016-10-28 15:23:25 -0700 | [diff] [blame] | 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 | } |
Josh Gao | 8a1b53c | 2017-06-27 14:06:19 -0700 | [diff] [blame] | 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 | } |
Josh Gao | 67887fe | 2021-03-01 23:02:54 -0800 | [diff] [blame] | 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 | } |
Yabin Cui | 3dbe823 | 2021-05-18 15:36:53 -0700 | [diff] [blame] | 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 | } |