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 "build/build_config.h" 17 #include "sandbox/linux/system_headers/linux_signal.h" 18 #include "sandbox/linux/tests/test_utils.h" 19 #include "sandbox/linux/tests/unit_tests.h" 20 #include "testing/gtest/include/gtest/gtest.h" 21 #include "third_party/valgrind/valgrind.h" 22 23 namespace sandbox { 24 25 namespace { 26 27 TEST(SyscallWrappers, BasicSyscalls) { 28 EXPECT_EQ(getpid(), sys_getpid()); 29 } 30 31 TEST(SyscallWrappers, CloneBasic) { 32 pid_t child = sys_clone(SIGCHLD); 33 TestUtils::HandlePostForkReturn(child); 34 EXPECT_LT(0, child); 35 } 36 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 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 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 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 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