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
TEST_F(NativeBridgeTest,PreInitializeNativeBridge)33 TEST_F(NativeBridgeTest, PreInitializeNativeBridge) {
34 ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary, nullptr));
35 #if !defined(__APPLE__) // Mac OS does not support bind-mount.
36 #if !defined(__ANDROID__) // Cannot write into the hard-wired location.
37 static constexpr const char* kTestData = "PreInitializeNativeBridge test.";
38
39 // Try to create our mount namespace.
40 if (unshare(CLONE_NEWNS) != -1) {
41 // Create a placeholder 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