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
23 namespace sandbox {
24
25 namespace {
26
TEST(SyscallWrappers,BasicSyscalls)27 TEST(SyscallWrappers, BasicSyscalls) {
28 EXPECT_EQ(getpid(), sys_getpid());
29 }
30
TEST(SyscallWrappers,CloneBasic)31 TEST(SyscallWrappers, CloneBasic) {
32 pid_t child = sys_clone(SIGCHLD);
33 TestUtils::HandlePostForkReturn(child);
34 EXPECT_LT(0, child);
35 }
36
TEST(SyscallWrappers,CloneParentSettid)37 TEST(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
TEST(SyscallWrappers,CloneChildSettid)46 TEST(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
TEST(SyscallWrappers,GetRESUid)66 TEST(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
TEST(SyscallWrappers,GetRESGid)76 TEST(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
TEST(SyscallWrappers,LinuxSigSet)86 TEST(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