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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <procinfo/process.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <algorithm>
#include <chrono>
#include <set>
#include <thread>
#include <vector>
#include <gtest/gtest.h>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/stringprintf.h>
#include <android-base/unique_fd.h>
using namespace std::chrono_literals;
#if defined(__GLIBC__)
#include <syscall.h>
static pid_t gettid() {
return syscall(__NR_gettid);
}
#endif
TEST(process_info, process_info_smoke) {
android::procinfo::ProcessInfo self;
ASSERT_TRUE(android::procinfo::GetProcessInfo(gettid(), &self));
ASSERT_EQ(gettid(), self.tid);
ASSERT_EQ(getpid(), self.pid);
ASSERT_EQ(getppid(), self.ppid);
ASSERT_EQ(getuid(), self.uid);
ASSERT_EQ(getgid(), self.gid);
}
TEST(process_info, process_info_proc_pid_fd_smoke) {
android::procinfo::ProcessInfo self;
int fd = open(android::base::StringPrintf("/proc/%d", gettid()).c_str(), O_DIRECTORY | O_RDONLY);
ASSERT_NE(-1, fd);
ASSERT_TRUE(android::procinfo::GetProcessInfoFromProcPidFd(fd, gettid(), &self));
// Process name is capped at 15 bytes.
ASSERT_EQ("libprocinfo_tes", self.name);
ASSERT_EQ(gettid(), self.tid);
ASSERT_EQ(getpid(), self.pid);
ASSERT_EQ(getppid(), self.ppid);
ASSERT_EQ(getuid(), self.uid);
ASSERT_EQ(getgid(), self.gid);
close(fd);
}
TEST(process_info, process_tids_smoke) {
pid_t main_tid = gettid();
std::thread([main_tid]() {
pid_t thread_tid = gettid();
{
std::vector<pid_t> vec;
ASSERT_TRUE(android::procinfo::GetProcessTids(getpid(), &vec));
ASSERT_EQ(1, std::count(vec.begin(), vec.end(), main_tid));
ASSERT_EQ(1, std::count(vec.begin(), vec.end(), thread_tid));
}
{
std::set<pid_t> set;
ASSERT_TRUE(android::procinfo::GetProcessTids(getpid(), &set));
ASSERT_EQ(1, std::count(set.begin(), set.end(), main_tid));
ASSERT_EQ(1, std::count(set.begin(), set.end(), thread_tid));
}
}).join();
}
TEST(process_info, process_state) {
int pipefd[2];
ASSERT_EQ(0, pipe2(pipefd, O_CLOEXEC));
pid_t forkpid = fork();
ASSERT_NE(-1, forkpid);
if (forkpid == 0) {
close(pipefd[1]);
char buf;
TEMP_FAILURE_RETRY(read(pipefd[0], &buf, 1));
_exit(0);
}
// Give the child some time to get to the read.
android::procinfo::ProcessInfo procinfo;
for (int loop = 0; loop < 50 && procinfo.state != android::procinfo::kProcessStateSleeping; loop++) {
std::this_thread::sleep_for(100ms);
ASSERT_TRUE(android::procinfo::GetProcessInfo(forkpid, &procinfo));
}
ASSERT_EQ(android::procinfo::kProcessStateSleeping, procinfo.state);
ASSERT_EQ(0, kill(forkpid, SIGKILL));
// Give the kernel some time to kill the child.
for (int loop = 0; loop < 50 && procinfo.state != android::procinfo::kProcessStateZombie; loop++) {
std::this_thread::sleep_for(100ms);
ASSERT_TRUE(android::procinfo::GetProcessInfo(forkpid, &procinfo));
}
ASSERT_EQ(android::procinfo::kProcessStateZombie, procinfo.state);
ASSERT_EQ(forkpid, waitpid(forkpid, nullptr, 0));
}
static uint64_t read_uptime_secs() {
std::string uptime;
if (!android::base::ReadFileToString("/proc/uptime", &uptime)) {
PLOG(FATAL) << "failed to read /proc/uptime";
}
return strtoll(uptime.c_str(), nullptr, 10);
}
TEST(process_info, process_start_time) {
uint64_t start = read_uptime_secs();
int pipefd[2];
ASSERT_EQ(0, pipe2(pipefd, O_CLOEXEC));
std::this_thread::sleep_for(1000ms);
pid_t forkpid = fork();
ASSERT_NE(-1, forkpid);
if (forkpid == 0) {
close(pipefd[1]);
char buf;
TEMP_FAILURE_RETRY(read(pipefd[0], &buf, 1));
_exit(0);
}
std::this_thread::sleep_for(1000ms);
uint64_t end = read_uptime_secs();
android::procinfo::ProcessInfo procinfo;
ASSERT_TRUE(android::procinfo::GetProcessInfo(forkpid, &procinfo));
// starttime is measured in clock ticks: uptime is in seconds:
uint64_t process_start = procinfo.starttime / sysconf(_SC_CLK_TCK);
ASSERT_LE(start, process_start);
ASSERT_LE(process_start, end);
ASSERT_EQ(0, kill(forkpid, SIGKILL));
ASSERT_EQ(forkpid, waitpid(forkpid, nullptr, 0));
}
TEST(process_info, GetProcessInfoFromProcPidFd_set_error) {
TemporaryDir tmp_dir;
android::base::unique_fd dirfd(open(tmp_dir.path, O_DIRECTORY | O_RDONLY));
android::procinfo::ProcessInfo procinfo;
std::string error;
// failed to open status file error
// No segfault if not given error string.
ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), 0, &procinfo));
// Set error when given error string.
ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), 0, &procinfo, &error));
ASSERT_EQ(error, "failed to open /proc/0/status in GetProcessInfoFromProcPidFd: No such file or directory");
// failed to parse status file error
std::string status_file = std::string(tmp_dir.path) + "/status";
ASSERT_TRUE(android::base::WriteStringToFile("invalid data", status_file));
ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), 0, &procinfo));
ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), 0, &procinfo, &error));
ASSERT_EQ(error, "failed to parse /proc/0/status");
// Give the "/status" file valid contents.
ASSERT_TRUE(android::base::WriteStringToFile(
"Name:\tsh\nTgid:\t0\nPid:\t0\nTracerPid:\t0\nUid:\t0\nGid:\t0\n", status_file));
// failed to open stat file error
ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), 0, &procinfo));
ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), 0, &procinfo, &error));
ASSERT_EQ(error, "failed to open /proc/0/stat: No such file or directory");
// failed to parse stat file error
std::string stat_file = std::string(tmp_dir.path) + "/stat";
ASSERT_TRUE(android::base::WriteStringToFile("2027 (sh) invalid data", stat_file));
ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), 0, &procinfo));
ASSERT_FALSE(android::procinfo::GetProcessInfoFromProcPidFd(dirfd.get(), 0, &procinfo, &error));
ASSERT_EQ(error, "failed to parse /proc/0/stat");
}
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