115 lines
3.8 KiB
C
115 lines
3.8 KiB
C
/*
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* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "jni.h"
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static JavaVM *jvm;
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static const char* jni_error_code(int ret) {
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switch(ret) {
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case JNI_OK: return "JNI_OK";
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case JNI_ERR: return "JNI_ERR";
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case JNI_EDETACHED: return "JNI_EDETACHED";
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case JNI_EVERSION: return "JNI_EVERSION";
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case JNI_ENOMEM: return "JNI_ENOMEM";
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case JNI_EEXIST: return "JNI_EEXIST";
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case JNI_EINVAL: return "JNI_EINVAL";
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default: return "Invalid JNI error code";
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}
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}
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static void report(const char* func, int ret_actual, int ret_expected) {
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const char* ret = jni_error_code(ret_actual);
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if (ret_actual == ret_expected) {
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printf("%s returned %s as expected\n", func, ret);
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} else {
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printf("Unexpected JNI return code %s from %s\n", ret, func);
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}
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}
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static int using_system_exit = 0; // Not System.exit by default
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JNIEXPORT
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void JNICALL Java_TestAtExit_00024Tester_setUsingSystemExit(JNIEnv* env, jclass c) {
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using_system_exit = 1;
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}
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void at_exit_handler(void) {
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printf("In at_exit_handler\n");
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// We've saved the JavaVM from OnLoad time so we first try to
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// get a JNIEnv for the current thread.
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JNIEnv *env;
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jint res = (*jvm)->GetEnv(jvm, (void **)&env, JNI_VERSION_1_2);
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report("GetEnv", res, JNI_EDETACHED);
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if (res == JNI_EDETACHED) {
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// Test all of the Invocation API functions
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res = (*jvm)->AttachCurrentThreadAsDaemon(jvm, (void **)&env, NULL);
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report("AttachCurrentThreadAsDaemon", res, JNI_ERR);
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res = (*jvm)->AttachCurrentThread(jvm, (void **)&env, NULL);
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report("AttachCurrentThread", res, JNI_ERR);
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res = (*jvm)->DetachCurrentThread(jvm);
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report("DetachCurrentThread", res, JNI_ERR);
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JavaVMInitArgs args;
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args.version = JNI_VERSION_1_2;
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res = JNI_GetDefaultJavaVMInitArgs(&args);
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report("JNI_GetDefaultJavaVMInitArgs", res, JNI_OK);
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JavaVM* jvm_p[1];
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int nVMs;
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res = JNI_GetCreatedJavaVMs(jvm_p, 1, &nVMs);
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report("JNI_GetCreatedJavaVMs", res, JNI_OK);
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// Whether nVMs is 0 or 1 depends on the termination path
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if (nVMs == 0 && !using_system_exit) {
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printf("Found 0 created VMs as expected\n");
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} else if (nVMs == 1 && using_system_exit) {
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printf("Found 1 created VM as expected\n");
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} else {
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printf("Unexpected number of created VMs: %d\n", nVMs);
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}
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res = (*jvm)->DestroyJavaVM(jvm);
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report("DestroyJavaVM", res, JNI_ERR);
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// Failure mode depends on the termination path
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res = JNI_CreateJavaVM(jvm_p, (void**)&env, &args);
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report("JNI_CreateJavaVM", res, using_system_exit ? JNI_EEXIST : JNI_ERR);
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}
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// else test has already failed
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}
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JNIEXPORT jint JNICALL
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JNI_OnLoad(JavaVM *vm, void *reserved) {
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printf("JNI_OnLoad: registering atexit handler\n");
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jvm = vm;
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atexit(at_exit_handler);
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return JNI_VERSION_1_1;
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}
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