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/***
* ASM tests
* Copyright (c) 2000-2011 INRIA, France Telecom
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.objectweb.asm;
import java.lang.instrument.ClassFileTransformer;
import java.lang.instrument.IllegalClassFormatException;
import java.lang.instrument.Instrumentation;
import java.security.ProtectionDomain;
import java.util.HashSet;
import junit.framework.TestSuite;
import org.objectweb.asm.attrs.CodeComment;
public class ClassWriterResizeInsnsTest extends AbstractTest {
public static void premain(final String agentArgs,
final Instrumentation inst) {
inst.addTransformer(new ClassFileTransformer() {
public byte[] transform(final ClassLoader loader,
final String className, final Class<?> classBeingRedefined,
final ProtectionDomain domain, byte[] b)
throws IllegalClassFormatException {
String n = className.replace('/', '.');
if (agentArgs.length() == 0 || n.indexOf(agentArgs) != -1) {
try {
b = transformClass(b, ClassWriter.COMPUTE_FRAMES);
if (n.equals("pkg.FrameMap")) {
transformClass(b, 0);
}
return b;
} catch (Throwable e) {
return transformClass(b, 0);
}
} else {
return null;
}
}
});
}
static byte[] transformClass(final byte[] clazz, final int flags) {
ClassReader cr = new ClassReader(clazz);
ClassWriter cw = new ComputeClassWriter(flags);
ClassVisitor ca = new ClassVisitor(Opcodes.ASM4, cw) {
boolean transformed = false;
@Override
public void visit(int version, int access, String name,
String signature, String superName, String[] interfaces) {
if (flags == ClassWriter.COMPUTE_FRAMES) {
// Set V1_7 version to prevent fallback to old verifier.
version = (version & 0xFFFF) < Opcodes.V1_7 ? Opcodes.V1_7
: version;
}
super.visit(version, access, name, signature, superName,
interfaces);
}
@Override
public MethodVisitor visitMethod(final int access,
final String name, final String desc,
final String signature, final String[] exceptions) {
return new MethodVisitor(Opcodes.ASM4, cv.visitMethod(access,
name, desc, signature, exceptions)) {
private final HashSet<Label> labels = new HashSet<Label>();
@Override
public void visitLabel(final Label label) {
super.visitLabel(label);
labels.add(label);
}
@Override
public void visitJumpInsn(final int opcode,
final Label label) {
super.visitJumpInsn(opcode, label);
if (opcode != Opcodes.GOTO) {
if (!transformed && !labels.contains(label)) {
transformed = true;
for (int i = 0; i < 33000; ++i) {
mv.visitInsn(Opcodes.NOP);
}
}
}
}
};
}
};
cr.accept(ca, new Attribute[] { new CodeComment() }, 0);
return cw.toByteArray();
}
public static TestSuite suite() throws Exception {
TestSuite suite = new ClassWriterResizeInsnsTest().getSuite();
suite.addTest(new VerifierTest());
return suite;
}
@Override
public void test() throws Exception {
try {
Class.forName(n, true, getClass().getClassLoader());
} catch (NoClassDefFoundError ncdfe) {
// ignored
} catch (UnsatisfiedLinkError ule) {
// ignored
} catch (ClassFormatError cfe) {
fail(cfe.getMessage());
} catch (VerifyError ve) {
fail(ve.toString());
}
}
}
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