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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <string>
#include <iostream>
#include <sstream>
#include "jvmti.h"
#include "base/logging.h"
#include "base/globals.h"
#include "base/memfd.h"
#ifdef __linux__
#include <sys/utsname.h>
#endif
namespace art {
namespace Test1963AddToDexClassLoaderInMemory {
extern "C" JNIEXPORT jboolean JNICALL Java_Main_hasWorkingMemfdCreate(JNIEnv*, jclass) {
// We should always have a working version if we're on normal buildbots.
if (!art::kIsTargetBuild) {
return true;
}
#ifdef __linux__
struct utsname name;
if (uname(&name) >= 0) {
std::istringstream version(name.release);
std::string major_str;
std::string minor_str;
std::getline(version, major_str, '.');
std::getline(version, minor_str, '.');
int major = std::stoi(major_str);
int minor = std::stoi(minor_str);
if (major >= 4 || (major == 3 && minor >= 17)) {
// memfd_create syscall was added in 3.17
return true;
}
}
#endif
int res = memfd_create_compat("TEST THAT MEMFD CREATE WORKS", 0);
if (res < 0) {
PLOG(ERROR) << "Unable to call memfd_create_compat successfully!";
return false;
} else {
close(res);
return true;
}
}
} // namespace Test1963AddToDexClassLoaderInMemory
} // namespace art
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