russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
/*
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* Copyright (c) 2017, 2024, 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 <jni.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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JNIEXPORT void JNICALL
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Java_NoClassDefFoundErrorTest_callDefineClass(JNIEnv *env, jclass klass, jstring className) {
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const char *c_name = (*env)->GetStringUTFChars(env, className, NULL);
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(*env)->DefineClass(env, c_name, NULL, NULL, 0);
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}
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JNIEXPORT void JNICALL
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Java_NoClassDefFoundErrorTest_callFindClass(JNIEnv *env, jclass klass, jstring className) {
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const char *c_name;
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jclass cls;
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if (className == NULL) {
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c_name = NULL;
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} else {
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c_name = (*env)->GetStringUTFChars(env, className, NULL);
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}
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cls = (*env)->FindClass(env, c_name);
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}
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static char* giant_string() {
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#ifdef _LP64
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size_t len = ((size_t)INT_MAX) + 3;
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char* c_name = malloc(len * sizeof(char));
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if (c_name != NULL) {
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memset(c_name, 'Y', len - 1);
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c_name[len - 1] = '\0';
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}
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return c_name;
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#else
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/* On 32-bit, gcc warns us against using values larger than ptrdiff_t for malloc,
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* memset and as array subscript. Since the chance of a 2GB allocation to be
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* successful is slim (would typically reach or exceed the user address space
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* size), lets just not bother. Returning NULL will cause the test to be silently
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* skipped. */
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return NULL;
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#endif
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}
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JNIEXPORT jboolean JNICALL
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Java_NoClassDefFoundErrorTest_tryCallDefineClass(JNIEnv *env, jclass klass) {
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char* c_name = giant_string();
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if (c_name != NULL) {
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(*env)->DefineClass(env, c_name, NULL, NULL, 0);
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free(c_name);
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return JNI_TRUE;
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}
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return JNI_FALSE;
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}
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JNIEXPORT jboolean JNICALL
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Java_NoClassDefFoundErrorTest_tryCallFindClass(JNIEnv *env, jclass klass) {
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char* c_name = giant_string();
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if (c_name != NULL) {
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jclass cls = (*env)->FindClass(env, c_name);
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free(c_name);
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return JNI_TRUE;
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}
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return JNI_FALSE;
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}
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