| /*** |
| * 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()); |
| } |
| } |
| } |