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/syscall_wrappers.h"
6
7#include <stdint.h>
8#include <sys/syscall.h>
9#include <sys/types.h>
10#include <sys/wait.h>
11#include <unistd.h>
12#include <cstring>
13
14#include "base/logging.h"
15#include "base/posix/eintr_wrapper.h"
16#include "base/third_party/valgrind/valgrind.h"
17#include "build/build_config.h"
18#include "sandbox/linux/system_headers/linux_signal.h"
19#include "sandbox/linux/tests/test_utils.h"
20#include "sandbox/linux/tests/unit_tests.h"
21#include "testing/gtest/include/gtest/gtest.h"
22
23namespace sandbox {
24
25namespace {
26
27TEST(SyscallWrappers, BasicSyscalls) {
28  EXPECT_EQ(getpid(), sys_getpid());
29}
30
31TEST(SyscallWrappers, CloneBasic) {
32  pid_t child = sys_clone(SIGCHLD);
33  TestUtils::HandlePostForkReturn(child);
34  EXPECT_LT(0, child);
35}
36
37TEST(SyscallWrappers, CloneParentSettid) {
38  pid_t ptid = 0;
39  pid_t child = sys_clone(CLONE_PARENT_SETTID | SIGCHLD, nullptr, &ptid,
40                          nullptr, nullptr);
41  TestUtils::HandlePostForkReturn(child);
42  EXPECT_LT(0, child);
43  EXPECT_EQ(child, ptid);
44}
45
46TEST(SyscallWrappers, CloneChildSettid) {
47  pid_t ctid = 0;
48  pid_t pid =
49      sys_clone(CLONE_CHILD_SETTID | SIGCHLD, nullptr, nullptr, &ctid, nullptr);
50
51  const int kSuccessExit = 0;
52  if (0 == pid) {
53    // In child.
54    if (sys_getpid() == ctid)
55      _exit(kSuccessExit);
56    _exit(1);
57  }
58
59  ASSERT_NE(-1, pid);
60  int status = 0;
61  ASSERT_EQ(pid, HANDLE_EINTR(waitpid(pid, &status, 0)));
62  ASSERT_TRUE(WIFEXITED(status));
63  EXPECT_EQ(kSuccessExit, WEXITSTATUS(status));
64}
65
66TEST(SyscallWrappers, GetRESUid) {
67  uid_t ruid, euid, suid;
68  uid_t sys_ruid, sys_euid, sys_suid;
69  ASSERT_EQ(0, getresuid(&ruid, &euid, &suid));
70  ASSERT_EQ(0, sys_getresuid(&sys_ruid, &sys_euid, &sys_suid));
71  EXPECT_EQ(ruid, sys_ruid);
72  EXPECT_EQ(euid, sys_euid);
73  EXPECT_EQ(suid, sys_suid);
74}
75
76TEST(SyscallWrappers, GetRESGid) {
77  gid_t rgid, egid, sgid;
78  gid_t sys_rgid, sys_egid, sys_sgid;
79  ASSERT_EQ(0, getresgid(&rgid, &egid, &sgid));
80  ASSERT_EQ(0, sys_getresgid(&sys_rgid, &sys_egid, &sys_sgid));
81  EXPECT_EQ(rgid, sys_rgid);
82  EXPECT_EQ(egid, sys_egid);
83  EXPECT_EQ(sgid, sys_sgid);
84}
85
86TEST(SyscallWrappers, LinuxSigSet) {
87  sigset_t sigset;
88  ASSERT_EQ(0, sigemptyset(&sigset));
89  ASSERT_EQ(0, sigaddset(&sigset, LINUX_SIGSEGV));
90  ASSERT_EQ(0, sigaddset(&sigset, LINUX_SIGBUS));
91  uint64_t linux_sigset = 0;
92  std::memcpy(&linux_sigset, &sigset,
93              std::min(sizeof(sigset), sizeof(linux_sigset)));
94  EXPECT_EQ((1ULL << (LINUX_SIGSEGV - 1)) | (1ULL << (LINUX_SIGBUS - 1)),
95            linux_sigset);
96}
97
98}  // namespace
99
100}  // namespace sandbox
101