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/*
* Copyright (C) 2010-2012 The Project Lombok Authors.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package lombok.bytecode;
import static lombok.bytecode.AsmUtil.fixJSRInlining;
import java.util.concurrent.atomic.AtomicBoolean;
import lombok.core.DiagnosticsReceiver;
import lombok.core.PostCompilerTransformation;
import org.mangosdk.spi.ProviderFor;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.Attribute;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
@ProviderFor(PostCompilerTransformation.class)
public class SneakyThrowsRemover implements PostCompilerTransformation {
@Override public byte[] applyTransformations(byte[] original, String fileName, DiagnosticsReceiver diagnostics) {
if (!new ClassFileMetaData(original).usesMethod("lombok/Lombok", "sneakyThrow")) return null;
byte[] fixedByteCode = fixJSRInlining(original);
ClassReader reader = new ClassReader(fixedByteCode);
ClassWriter writer = new FixedClassWriter(reader, ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
final AtomicBoolean changesMade = new AtomicBoolean();
class SneakyThrowsRemoverVisitor extends MethodVisitor {
boolean justAddedAthrow = false;
SneakyThrowsRemoverVisitor(MethodVisitor mv) {
super(Opcodes.ASM4, mv);
}
@Override public void visitMethodInsn(int opcode, String owner, String name, String desc) {
justAddedAthrow = false;
boolean hit = true;
if (hit && opcode != Opcodes.INVOKESTATIC) hit = false;
if (hit && !"sneakyThrow".equals(name)) hit = false;
if (hit && !"lombok/Lombok".equals(owner)) hit = false;
if (hit && !"(Ljava/lang/Throwable;)Ljava/lang/RuntimeException;".equals(desc)) hit = false;
if (hit) {
changesMade.set(true);
justAddedAthrow = true;
super.visitInsn(Opcodes.ATHROW);
} else {
super.visitMethodInsn(opcode, owner, name, desc);
}
}
@Override public void visitInsn(int opcode) {
if (!justAddedAthrow || opcode != Opcodes.ATHROW) {
super.visitInsn(opcode);
}
justAddedAthrow = false;
}
@Override public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
justAddedAthrow = false;
return super.visitAnnotation(desc, visible);
}
@Override public AnnotationVisitor visitAnnotationDefault() {
justAddedAthrow = false;
return super.visitAnnotationDefault();
}
@Override public void visitAttribute(Attribute attr) {
justAddedAthrow = false;
super.visitAttribute(attr);
}
@Override public void visitFieldInsn(int opcode, String owner, String name, String desc) {
justAddedAthrow = false;
super.visitFieldInsn(opcode, owner, name, desc);
}
@Override public void visitIincInsn(int var, int increment) {
justAddedAthrow = false;
super.visitIincInsn(var, increment);
}
@Override public void visitIntInsn(int opcode, int operand) {
justAddedAthrow = false;
super.visitIntInsn(opcode, operand);
}
@Override public void visitJumpInsn(int opcode, Label label) {
justAddedAthrow = false;
super.visitJumpInsn(opcode, label);
}
@Override public void visitLabel(Label label) {
justAddedAthrow = false;
super.visitLabel(label);
}
@Override public void visitLdcInsn(Object cst) {
justAddedAthrow = false;
super.visitLdcInsn(cst);
}
@Override public void visitLocalVariable(String name, String desc, String signature, Label start, Label end, int index) {
justAddedAthrow = false;
super.visitLocalVariable(name, desc, signature, start, end, index);
}
@Override public void visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels) {
justAddedAthrow = false;
super.visitLookupSwitchInsn(dflt, keys, labels);
}
@Override public void visitMultiANewArrayInsn(String desc, int dims) {
justAddedAthrow = false;
super.visitMultiANewArrayInsn(desc, dims);
}
@Override public AnnotationVisitor visitParameterAnnotation(int parameter, String desc, boolean visible) {
justAddedAthrow = false;
return super.visitParameterAnnotation(parameter, desc, visible);
}
@Override public void visitTableSwitchInsn(int min, int max, Label dflt, Label... labels) {
justAddedAthrow = false;
super.visitTableSwitchInsn(min, max, dflt, labels);
}
@Override public void visitTryCatchBlock(Label start, Label end, Label handler, String type) {
justAddedAthrow = false;
super.visitTryCatchBlock(start, end, handler, type);
}
@Override public void visitTypeInsn(int opcode, String type) {
justAddedAthrow = false;
super.visitTypeInsn(opcode, type);
}
@Override public void visitVarInsn(int opcode, int var) {
justAddedAthrow = false;
super.visitVarInsn(opcode, var);
}
}
reader.accept(new ClassVisitor(Opcodes.ASM4, writer) {
@Override public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
return new SneakyThrowsRemoverVisitor(super.visitMethod(access, name, desc, signature, exceptions));
}
}, 0);
return changesMade.get() ? writer.toByteArray() : null;
}
}
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