| /* |
| * Copyright (c) 2020, Oracle and/or its affiliates. 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 "jni.h" |
| |
| static JavaVM *jvm; |
| |
| static const char* jni_error_code(int ret) { |
| switch(ret) { |
| case JNI_OK: return "JNI_OK"; |
| case JNI_ERR: return "JNI_ERR"; |
| case JNI_EDETACHED: return "JNI_EDETACHED"; |
| case JNI_EVERSION: return "JNI_EVERSION"; |
| case JNI_ENOMEM: return "JNI_ENOMEM"; |
| case JNI_EEXIST: return "JNI_EEXIST"; |
| case JNI_EINVAL: return "JNI_EINVAL"; |
| default: return "Invalid JNI error code"; |
| } |
| } |
| |
| static void report(const char* func, int ret_actual, int ret_expected) { |
| const char* ret = jni_error_code(ret_actual); |
| if (ret_actual == ret_expected) { |
| printf("%s returned %s as expected\n", func, ret); |
| } else { |
| printf("Unexpected JNI return code %s from %s\n", ret, func); |
| } |
| } |
| |
| static int using_system_exit = 0; // Not System.exit by default |
| |
| JNIEXPORT |
| void JNICALL Java_TestAtExit_00024Tester_setUsingSystemExit(JNIEnv* env, jclass c) { |
| using_system_exit = 1; |
| } |
| |
| void at_exit_handler(void) { |
| printf("In at_exit_handler\n"); |
| |
| // We've saved the JavaVM from OnLoad time so we first try to |
| // get a JNIEnv for the current thread. |
| JNIEnv *env; |
| jint res = (*jvm)->GetEnv(jvm, (void **)&env, JNI_VERSION_1_2); |
| report("GetEnv", res, JNI_EDETACHED); |
| if (res == JNI_EDETACHED) { |
| |
| // Test all of the Invocation API functions |
| |
| res = (*jvm)->AttachCurrentThreadAsDaemon(jvm, (void **)&env, NULL); |
| report("AttachCurrentThreadAsDaemon", res, JNI_ERR); |
| res = (*jvm)->AttachCurrentThread(jvm, (void **)&env, NULL); |
| report("AttachCurrentThread", res, JNI_ERR); |
| res = (*jvm)->DetachCurrentThread(jvm); |
| report("DetachCurrentThread", res, JNI_ERR); |
| |
| JavaVMInitArgs args; |
| args.version = JNI_VERSION_1_2; |
| res = JNI_GetDefaultJavaVMInitArgs(&args); |
| report("JNI_GetDefaultJavaVMInitArgs", res, JNI_OK); |
| |
| JavaVM* jvm_p[1]; |
| int nVMs; |
| res = JNI_GetCreatedJavaVMs(jvm_p, 1, &nVMs); |
| report("JNI_GetCreatedJavaVMs", res, JNI_OK); |
| // Whether nVMs is 0 or 1 depends on the termination path |
| if (nVMs == 0 && !using_system_exit) { |
| printf("Found 0 created VMs as expected\n"); |
| } else if (nVMs == 1 && using_system_exit) { |
| printf("Found 1 created VM as expected\n"); |
| } else { |
| printf("Unexpected number of created VMs: %d\n", nVMs); |
| } |
| |
| res = (*jvm)->DestroyJavaVM(jvm); |
| report("DestroyJavaVM", res, JNI_ERR); |
| |
| // Failure mode depends on the termination path |
| res = JNI_CreateJavaVM(jvm_p, (void**)&env, &args); |
| report("JNI_CreateJavaVM", res, using_system_exit ? JNI_EEXIST : JNI_ERR); |
| } |
| // else test has already failed |
| } |
| |
| JNIEXPORT jint JNICALL |
| JNI_OnLoad(JavaVM *vm, void *reserved) { |
| printf("JNI_OnLoad: registering atexit handler\n"); |
| jvm = vm; |
| atexit(at_exit_handler); |
| |
| return JNI_VERSION_1_1; |
| } |