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/*
* Copyright (c) 2022, 2025, 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.
*/
/*
* @test
* @bug 8144992
* @requires vm.jvmti
* @library /testlibrary/asm
* @run main/othervm/native -agentlib:TestManyBreakpoints
* -Xlog:gc+metaspace
* -Xint
* -XX:MetaspaceSize=16K -XX:MaxMetaspaceSize=64M
* TestManyBreakpoints
*/
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
public class TestManyBreakpoints {
static final int BATCHES = 50;
static final int METHODS = 1000;
public static void main(String[] args) throws Exception {
for (int c = 0; c < BATCHES; c++) {
System.out.println("Batch " + c);
TestClassLoader loader = new TestClassLoader();
Class.forName("Target", true, loader);
}
}
private static class TestClassLoader extends ClassLoader implements Opcodes {
static byte[] TARGET_BYTES = generateTarget();
private static byte[] generateTarget() {
ClassWriter cw = new ClassWriter(0);
cw.visit(52, ACC_SUPER | ACC_PUBLIC, "Target", null, "java/lang/Object", null);
for (int m = 0; m < METHODS; m++) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "m" + m, "()V", null, null);
mv.visitCode();
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
@Override
protected Class<?> findClass(String name) throws ClassNotFoundException {
if (name.equals("Target")) {
return defineClass(name, TARGET_BYTES, 0, TARGET_BYTES.length);
} else {
return super.findClass(name);
}
}
}
}
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