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/stringprintf.h>
32
33 using namespace std::chrono_literals;
34
35 #if !defined(__BIONIC__)
36 #include <syscall.h>
gettid()37 static pid_t gettid() {
38 return syscall(__NR_gettid);
39 }
40 #endif
41
TEST(process_info,process_info_smoke)42 TEST(process_info, process_info_smoke) {
43 android::procinfo::ProcessInfo self;
44 ASSERT_TRUE(android::procinfo::GetProcessInfo(gettid(), &self));
45 ASSERT_EQ(gettid(), self.tid);
46 ASSERT_EQ(getpid(), self.pid);
47 ASSERT_EQ(getppid(), self.ppid);
48 ASSERT_EQ(getuid(), self.uid);
49 ASSERT_EQ(getgid(), self.gid);
50 }
51
TEST(process_info,process_info_proc_pid_fd_smoke)52 TEST(process_info, process_info_proc_pid_fd_smoke) {
53 android::procinfo::ProcessInfo self;
54 int fd = open(android::base::StringPrintf("/proc/%d", gettid()).c_str(), O_DIRECTORY | O_RDONLY);
55 ASSERT_NE(-1, fd);
56 ASSERT_TRUE(android::procinfo::GetProcessInfoFromProcPidFd(fd, &self));
57
58 // Process name is capped at 15 bytes.
59 ASSERT_EQ("libprocinfo_tes", self.name);
60 ASSERT_EQ(gettid(), self.tid);
61 ASSERT_EQ(getpid(), self.pid);
62 ASSERT_EQ(getppid(), self.ppid);
63 ASSERT_EQ(getuid(), self.uid);
64 ASSERT_EQ(getgid(), self.gid);
65 close(fd);
66 }
67
TEST(process_info,process_tids_smoke)68 TEST(process_info, process_tids_smoke) {
69 pid_t main_tid = gettid();
70 std::thread([main_tid]() {
71 pid_t thread_tid = gettid();
72
73 {
74 std::vector<pid_t> vec;
75 ASSERT_TRUE(android::procinfo::GetProcessTids(getpid(), &vec));
76 ASSERT_EQ(1, std::count(vec.begin(), vec.end(), main_tid));
77 ASSERT_EQ(1, std::count(vec.begin(), vec.end(), thread_tid));
78 }
79
80 {
81 std::set<pid_t> set;
82 ASSERT_TRUE(android::procinfo::GetProcessTids(getpid(), &set));
83 ASSERT_EQ(1, std::count(set.begin(), set.end(), main_tid));
84 ASSERT_EQ(1, std::count(set.begin(), set.end(), thread_tid));
85 }
86 }).join();
87 }
88
TEST(process_info,process_state)89 TEST(process_info, process_state) {
90 int pipefd[2];
91 ASSERT_EQ(0, pipe2(pipefd, O_CLOEXEC));
92 pid_t forkpid = fork();
93
94 ASSERT_NE(-1, forkpid);
95 if (forkpid == 0) {
96 close(pipefd[1]);
97 char buf;
98 TEMP_FAILURE_RETRY(read(pipefd[0], &buf, 1));
99 _exit(0);
100 }
101
102 // Give the child some time to get to the read.
103 std::this_thread::sleep_for(100ms);
104
105 android::procinfo::ProcessInfo procinfo;
106 ASSERT_TRUE(android::procinfo::GetProcessInfo(forkpid, &procinfo));
107 ASSERT_EQ(android::procinfo::kProcessStateSleeping, procinfo.state);
108
109 ASSERT_EQ(0, kill(forkpid, SIGKILL));
110
111 // Give the kernel some time to kill the child.
112 std::this_thread::sleep_for(100ms);
113
114 ASSERT_TRUE(android::procinfo::GetProcessInfo(forkpid, &procinfo));
115 ASSERT_EQ(android::procinfo::kProcessStateZombie, procinfo.state);
116
117 ASSERT_EQ(forkpid, waitpid(forkpid, nullptr, 0));
118 }
119