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 "NativeBridgeTest.h"
18
19 #include <cstdio>
20 #include <cstring>
21 #include <cutils/log.h>
22 #include <dlfcn.h>
23 #include <errno.h>
24 #include <fcntl.h>
25 #include <stdio.h>
26 #include <sys/mount.h>
27 #include <sys/stat.h>
28
29 namespace android {
30
31 static constexpr const char* kTestData = "PreInitializeNativeBridge test.";
32
TEST_F(NativeBridgeTest,PreInitializeNativeBridge)33 TEST_F(NativeBridgeTest, PreInitializeNativeBridge) {
34 ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary, nullptr));
35 #ifndef __APPLE__ // Mac OS does not support bind-mount.
36 #ifndef HAVE_ANDROID_OS // Cannot write into the hard-wired location.
37 // Try to create our mount namespace.
38 if (unshare(CLONE_NEWNS) != -1) {
39 // Create a dummy file.
40 FILE* cpuinfo = fopen("./cpuinfo", "w");
41 ASSERT_NE(nullptr, cpuinfo) << strerror(errno);
42 fprintf(cpuinfo, kTestData);
43 fclose(cpuinfo);
44
45 ASSERT_TRUE(PreInitializeNativeBridge("does not matter 1", "short 2"));
46
47 // Read /proc/cpuinfo
48 FILE* proc_cpuinfo = fopen("/proc/cpuinfo", "r");
49 ASSERT_NE(nullptr, proc_cpuinfo) << strerror(errno);
50 char buf[1024];
51 EXPECT_NE(nullptr, fgets(buf, sizeof(buf), proc_cpuinfo)) << "Error reading.";
52 fclose(proc_cpuinfo);
53
54 EXPECT_EQ(0, strcmp(buf, kTestData));
55
56 // Delete the file.
57 ASSERT_EQ(0, unlink("./cpuinfo")) << "Error unlinking temporary file.";
58 // Ending the test will tear down the mount namespace.
59 } else {
60 GTEST_LOG_(WARNING) << "Could not create mount namespace. Are you running this as root?";
61 }
62 #endif
63 #endif
64 }
65
66 } // namespace android
67