1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <dlfcn.h> 18 #include <errno.h> 19 #include <fcntl.h> 20 #include <stdio.h> 21 #include <sys/mount.h> 22 #include <sys/stat.h> 23 24 #include <cstdio> 25 #include <cstring> 26 27 #include <android/log.h> 28 29 #include "NativeBridgeTest.h" 30 31 namespace android { 32 33 static constexpr const char* kTestData = "PreInitializeNativeBridge test."; 34 35 TEST_F(NativeBridgeTest, PreInitializeNativeBridge) { 36 ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary, nullptr)); 37 #if !defined(__APPLE__) // Mac OS does not support bind-mount. 38 #if !defined(__ANDROID__) // Cannot write into the hard-wired location. 39 // Try to create our mount namespace. 40 if (unshare(CLONE_NEWNS) != -1) { 41 // Create a dummy file. 42 FILE* cpuinfo = fopen("./cpuinfo", "w"); 43 ASSERT_NE(nullptr, cpuinfo) << strerror(errno); 44 fprintf(cpuinfo, kTestData); 45 fclose(cpuinfo); 46 47 ASSERT_TRUE(PreInitializeNativeBridge("does not matter 1", "short 2")); 48 49 // Read /proc/cpuinfo 50 FILE* proc_cpuinfo = fopen("/proc/cpuinfo", "r"); 51 ASSERT_NE(nullptr, proc_cpuinfo) << strerror(errno); 52 char buf[1024]; 53 EXPECT_NE(nullptr, fgets(buf, sizeof(buf), proc_cpuinfo)) << "Error reading."; 54 fclose(proc_cpuinfo); 55 56 EXPECT_EQ(0, strcmp(buf, kTestData)); 57 58 // Delete the file. 59 ASSERT_EQ(0, unlink("./cpuinfo")) << "Error unlinking temporary file."; 60 // Ending the test will tear down the mount namespace. 61 } else { 62 GTEST_LOG_(WARNING) << "Could not create mount namespace. Are you running this as root?"; 63 } 64 #endif 65 #endif 66 } 67 68 } // namespace android 69
