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/*
* Copyright (c) 2018, 2021, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2021, Azul Systems, Inc. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include "jni.h"
#if defined(__APPLE__) && defined(__aarch64__)
#include <pthread.h>
#include <sys/mman.h>
JavaVM* jvm;
static void* codegen;
static int thread_start2(int val) {
JNIEnv *env;
jclass class_id;
jmethodID method_id;
int res;
printf("Native thread is running and attaching ...\n");
res = (*jvm)->AttachCurrentThread(jvm, (void **)&env, NULL);
if (res != JNI_OK) {
fprintf(stderr, "Test ERROR. Can't attach current thread: %d\n", res);
exit(1);
}
res = (*jvm)->DetachCurrentThread(jvm);
if (res != JNI_OK) {
fprintf(stderr, "Test ERROR. Can't detach current thread: %d\n", res);
exit(1);
}
printf("Native thread is about to finish\n");
return 1 + val;
}
static int trampoline(int(*fn)(int), int arg) {
int val = fn(arg);
// ensure code in MAP_JIT area after target function returns
return 1 + val;
}
static void * thread_start(void* unused) {
int val = ((int(*)(int(*)(int),int))codegen)(thread_start2, 10);
printf("return val = %d\n", val);
return NULL;
}
JNIEXPORT void JNICALL
Java_TestCodegenAttach_testCodegenAttach
(JNIEnv *env, jclass cls) {
codegen = mmap(NULL, 0x1000,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_JIT, -1, 0);
if (codegen == MAP_FAILED) {
perror("mmap");
exit(1);
}
pthread_jit_write_protect_np(false);
memcpy(codegen, trampoline, 128);
pthread_jit_write_protect_np(true);
pthread_t thread;
int res = (*env)->GetJavaVM(env, &jvm);
if (res != JNI_OK) {
fprintf(stderr, "Test ERROR. Can't extract JavaVM: %d\n", res);
exit(1);
}
if ((res = pthread_create(&thread, NULL, thread_start, NULL)) != 0) {
fprintf(stderr, "TEST ERROR: pthread_create failed: %s (%d)\n", strerror(res), res);
exit(1);
}
if ((res = pthread_join(thread, NULL)) != 0) {
fprintf(stderr, "TEST ERROR: pthread_join failed: %s (%d)\n", strerror(res), res);
exit(1);
}
}
#else
JNIEXPORT void JNICALL
Java_TestCodegenAttach_testCodegenAttach
(JNIEnv *env, jclass cls) {
printf("should not reach here\n");
exit(1);
}
#endif // __APPLE__ && __aarch64__
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