1 /*
2 * Copyright (C) 2019 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
18 #include <string>
19 #include <iostream>
20 #include <sstream>
21
22 #include "jvmti.h"
23
24 #include "base/logging.h"
25 #include "base/globals.h"
26 #include "base/memfd.h"
27
28 #ifdef __linux__
29 #include <sys/utsname.h>
30 #endif
31
32 namespace art {
33 namespace Test1963AddToDexClassLoaderInMemory {
34
Java_Main_hasWorkingMemfdCreate(JNIEnv *,jclass)35 extern "C" JNIEXPORT jboolean JNICALL Java_Main_hasWorkingMemfdCreate(JNIEnv*, jclass) {
36 // We should always have a working version if we're on normal buildbots.
37 if (!art::kIsTargetBuild) {
38 return true;
39 }
40 #ifdef __linux__
41 struct utsname name;
42 if (uname(&name) >= 0) {
43 std::istringstream version(name.release);
44 std::string major_str;
45 std::string minor_str;
46 std::getline(version, major_str, '.');
47 std::getline(version, minor_str, '.');
48 int major = std::stoi(major_str);
49 int minor = std::stoi(minor_str);
50 if (major >= 4 || (major == 3 && minor >= 17)) {
51 // memfd_create syscall was added in 3.17
52 return true;
53 }
54 }
55 #endif
56 int res = memfd_create_compat("TEST THAT MEMFD CREATE WORKS", 0);
57 if (res < 0) {
58 PLOG(ERROR) << "Unable to call memfd_create_compat successfully!";
59 return false;
60 } else {
61 close(res);
62 return true;
63 }
64 }
65
66 } // namespace Test1963AddToDexClassLoaderInMemory
67 } // namespace art
68