1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "sandbox/linux/services/scoped_process.h"
6
7 #include <errno.h>
8 #include <fcntl.h>
9 #include <sys/stat.h>
10 #include <sys/types.h>
11 #include <sys/wait.h>
12 #include <unistd.h>
13
14 #include "base/bind.h"
15 #include "base/bind_helpers.h"
16 #include "base/callback.h"
17 #include "base/files/file_util.h"
18 #include "base/files/scoped_file.h"
19 #include "base/logging.h"
20 #include "base/posix/eintr_wrapper.h"
21 #include "base/threading/platform_thread.h"
22 #include "base/time/time.h"
23 #include "sandbox/linux/tests/unit_tests.h"
24 #include "testing/gtest/include/gtest/gtest.h"
25
26 namespace sandbox {
27
28 namespace {
29
DoExit()30 void DoExit() { _exit(0); }
31
ExitWithCode(int exit_code)32 void ExitWithCode(int exit_code) { _exit(exit_code); }
33
RaiseAndExit(int signal)34 void RaiseAndExit(int signal) {
35 PCHECK(0 == raise(signal));
36 _exit(0);
37 }
38
TEST(ScopedProcess,ScopedProcessNormalExit)39 TEST(ScopedProcess, ScopedProcessNormalExit) {
40 const int kCustomExitCode = 12;
41 ScopedProcess process(base::BindOnce(&ExitWithCode, kCustomExitCode));
42 bool got_signaled = true;
43 int exit_code = process.WaitForExit(&got_signaled);
44 EXPECT_FALSE(got_signaled);
45 EXPECT_EQ(kCustomExitCode, exit_code);
46
47 // Verify that WaitForExit() can be called multiple times on the same
48 // process.
49 bool got_signaled2 = true;
50 int exit_code2 = process.WaitForExit(&got_signaled2);
51 EXPECT_FALSE(got_signaled2);
52 EXPECT_EQ(kCustomExitCode, exit_code2);
53 }
54
55 // Disable this test on Android, SIGABRT is funky there.
TEST(ScopedProcess,DISABLE_ON_ANDROID (ScopedProcessAbort))56 TEST(ScopedProcess, DISABLE_ON_ANDROID(ScopedProcessAbort)) {
57 PCHECK(SIG_ERR != signal(SIGABRT, SIG_DFL));
58 ScopedProcess process(base::BindOnce(&RaiseAndExit, SIGABRT));
59 bool got_signaled = false;
60 int exit_code = process.WaitForExit(&got_signaled);
61 EXPECT_TRUE(got_signaled);
62 EXPECT_EQ(SIGABRT, exit_code);
63 }
64
TEST(ScopedProcess,ScopedProcessSignaled)65 TEST(ScopedProcess, ScopedProcessSignaled) {
66 ScopedProcess process{base::DoNothing()};
67 bool got_signaled = false;
68 ASSERT_EQ(0, kill(process.GetPid(), SIGKILL));
69 int exit_code = process.WaitForExit(&got_signaled);
70 EXPECT_TRUE(got_signaled);
71 EXPECT_EQ(SIGKILL, exit_code);
72 }
73
TEST(ScopedProcess,DiesForReal)74 TEST(ScopedProcess, DiesForReal) {
75 int pipe_fds[2];
76 ASSERT_EQ(0, pipe(pipe_fds));
77 base::ScopedFD read_end_closer(pipe_fds[0]);
78 base::ScopedFD write_end_closer(pipe_fds[1]);
79
80 { ScopedProcess process(base::BindOnce(&DoExit)); }
81
82 // Close writing end of the pipe.
83 write_end_closer.reset();
84 pipe_fds[1] = -1;
85
86 ASSERT_EQ(0, fcntl(pipe_fds[0], F_SETFL, O_NONBLOCK));
87 char c;
88 // If the child process is dead for real, there will be no writing end
89 // for this pipe left and read will EOF instead of returning EWOULDBLOCK.
90 ASSERT_EQ(0, read(pipe_fds[0], &c, 1));
91 }
92
TEST(ScopedProcess,SynchronizationBasic)93 TEST(ScopedProcess, SynchronizationBasic) {
94 ScopedProcess process1{base::DoNothing()};
95 EXPECT_TRUE(process1.WaitForClosureToRun());
96
97 ScopedProcess process2(base::BindOnce(&DoExit));
98 // The closure didn't finish running normally. This case is simple enough
99 // that process.WaitForClosureToRun() should return false, even though the
100 // API does not guarantees that it will return at all.
101 EXPECT_FALSE(process2.WaitForClosureToRun());
102 }
103
SleepInMsAndWriteOneByte(int time_to_sleep,int fd)104 void SleepInMsAndWriteOneByte(int time_to_sleep, int fd) {
105 base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(time_to_sleep));
106 CHECK(1 == write(fd, "1", 1));
107 }
108
TEST(ScopedProcess,SynchronizationWorks)109 TEST(ScopedProcess, SynchronizationWorks) {
110 int pipe_fds[2];
111 ASSERT_EQ(0, pipe(pipe_fds));
112 base::ScopedFD read_end_closer(pipe_fds[0]);
113 base::ScopedFD write_end_closer(pipe_fds[1]);
114
115 // Start a process with a closure that takes a little bit to run.
116 ScopedProcess process(
117 base::BindOnce(&SleepInMsAndWriteOneByte, 100, pipe_fds[1]));
118 EXPECT_TRUE(process.WaitForClosureToRun());
119
120 // Verify that the closure did, indeed, run.
121 ASSERT_EQ(0, fcntl(pipe_fds[0], F_SETFL, O_NONBLOCK));
122 char c = 0;
123 EXPECT_EQ(1, read(pipe_fds[0], &c, 1));
124 EXPECT_EQ('1', c);
125 }
126
127 } // namespace
128
129 } // namespace sandbox
130