tests/tests/security/jni/android_security_cts_NativeCodeTest.cpp

/*
 * Copyright (C) 2013 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 <jni.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/syscall.h>

/*
 * Returns true iff this device is vulnerable to CVE-2013-2094.
 * A patch for CVE-2013-2094 can be found at
 * http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8176cced706b5e5d15887584150764894e94e02f
 */
static jboolean android_security_cts_NativeCodeTest_doPerfEventTest(JNIEnv* env, jobject thiz)
{
    uint64_t attr[10] = { 0x4800000001, (uint32_t) -1, 0, 0, 0, 0x300 };

    int fd = syscall(__NR_perf_event_open, attr, 0, -1, -1, 0);
    jboolean result = (fd != -1);

    if (fd != -1) {
        close(fd);
    }

    return result;
}

static JNINativeMethod gMethods[] = {
    {  "doPerfEventTest", "()Z",
            (void *) android_security_cts_NativeCodeTest_doPerfEventTest },
};

int register_android_security_cts_NativeCodeTest(JNIEnv* env)
{
    jclass clazz = env->FindClass("android/security/cts/NativeCodeTest");
    return env->RegisterNatives(clazz, gMethods,
            sizeof(gMethods) / sizeof(JNINativeMethod));
}