83 lines
2.8 KiB
Java
83 lines
2.8 KiB
Java
/*
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* Copyright (c) 2022, 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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/*
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* @test
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* @bug 8144992
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* @requires vm.jvmti
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* @modules java.base/jdk.internal.org.objectweb.asm
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* @run main/othervm/native -agentlib:TestManyBreakpoints
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* -Xlog:gc+metaspace
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* -Xint
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* -XX:MetaspaceSize=16K -XX:MaxMetaspaceSize=64M
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* TestManyBreakpoints
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*/
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import jdk.internal.org.objectweb.asm.ClassWriter;
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import jdk.internal.org.objectweb.asm.Label;
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import jdk.internal.org.objectweb.asm.MethodVisitor;
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import jdk.internal.org.objectweb.asm.Opcodes;
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public class TestManyBreakpoints {
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static final int BATCHES = 50;
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static final int METHODS = 1000;
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public static void main(String[] args) throws Exception {
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for (int c = 0; c < BATCHES; c++) {
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System.out.println("Batch " + c);
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TestClassLoader loader = new TestClassLoader();
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Class.forName("Target", true, loader);
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}
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}
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private static class TestClassLoader extends ClassLoader implements Opcodes {
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static byte[] TARGET_BYTES = generateTarget();
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private static byte[] generateTarget() {
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ClassWriter cw = new ClassWriter(0);
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cw.visit(52, ACC_SUPER | ACC_PUBLIC, "Target", null, "java/lang/Object", null);
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for (int m = 0; m < METHODS; m++) {
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MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "m" + m, "()V", null, null);
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mv.visitCode();
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mv.visitInsn(RETURN);
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mv.visitMaxs(0, 0);
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mv.visitEnd();
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}
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cw.visitEnd();
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return cw.toByteArray();
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}
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@Override
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protected Class<?> findClass(String name) throws ClassNotFoundException {
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if (name.equals("Target")) {
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return defineClass(name, TARGET_BYTES, 0, TARGET_BYTES.length);
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} else {
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return super.findClass(name);
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}
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}
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}
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}
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