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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "sandbox/linux/services/syscall_wrappers.h" | 5 #include "sandbox/linux/services/syscall_wrappers.h" |
6 | 6 |
7 #include <sys/syscall.h> | 7 #include <sys/syscall.h> |
8 #include <sys/types.h> | 8 #include <sys/types.h> |
9 #include <sys/wait.h> | 9 #include <sys/wait.h> |
10 #include <unistd.h> | 10 #include <unistd.h> |
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32 TEST(SyscallWrappers, CloneParentSettid) { | 32 TEST(SyscallWrappers, CloneParentSettid) { |
33 pid_t ptid = 0; | 33 pid_t ptid = 0; |
34 pid_t child = sys_clone(CLONE_PARENT_SETTID | SIGCHLD, nullptr, &ptid, | 34 pid_t child = sys_clone(CLONE_PARENT_SETTID | SIGCHLD, nullptr, &ptid, |
35 nullptr, nullptr); | 35 nullptr, nullptr); |
36 TestUtils::HandlePostForkReturn(child); | 36 TestUtils::HandlePostForkReturn(child); |
37 EXPECT_LT(0, child); | 37 EXPECT_LT(0, child); |
38 EXPECT_EQ(child, ptid); | 38 EXPECT_EQ(child, ptid); |
39 } | 39 } |
40 | 40 |
41 TEST(SyscallWrappers, CloneChildSettid) { | 41 TEST(SyscallWrappers, CloneChildSettid) { |
| 42 // Warm up the libc pid cache, if there is one. |
| 43 ASSERT_EQ(sys_getpid(), getpid()); |
| 44 |
42 pid_t ctid = 0; | 45 pid_t ctid = 0; |
43 pid_t pid = | 46 pid_t pid = |
44 sys_clone(CLONE_CHILD_SETTID | SIGCHLD, nullptr, nullptr, &ctid, nullptr); | 47 sys_clone(CLONE_CHILD_SETTID | SIGCHLD, nullptr, nullptr, &ctid, nullptr); |
45 | 48 |
46 const int kSuccessExit = 0; | 49 const int kSuccessExit = 0; |
47 if (0 == pid) { | 50 if (0 == pid) { |
48 // In child. | 51 // In child. Check both the raw getpid syscall and the libc getpid wrapper |
49 if (sys_getpid() == ctid) | 52 // (which may rely on a pid cache). |
| 53 if (sys_getpid() == ctid && getpid() == ctid) |
50 _exit(kSuccessExit); | 54 _exit(kSuccessExit); |
51 _exit(1); | 55 _exit(1); |
52 } | 56 } |
53 | 57 |
54 ASSERT_NE(-1, pid); | 58 ASSERT_NE(-1, pid); |
55 int status = 0; | 59 int status = 0; |
56 ASSERT_EQ(pid, HANDLE_EINTR(waitpid(pid, &status, 0))); | 60 ASSERT_EQ(pid, HANDLE_EINTR(waitpid(pid, &status, 0))); |
57 ASSERT_TRUE(WIFEXITED(status)); | 61 ASSERT_TRUE(WIFEXITED(status)); |
58 EXPECT_EQ(kSuccessExit, WEXITSTATUS(status)); | 62 EXPECT_EQ(kSuccessExit, WEXITSTATUS(status)); |
59 } | 63 } |
60 | 64 |
61 } // namespace | 65 } // namespace |
62 | 66 |
63 } // namespace sandbox | 67 } // namespace sandbox |
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