package railo.transformer.bytecode.visitor;
import org.objectweb.asm.Label;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.commons.GeneratorAdapter;
import railo.transformer.bytecode.BytecodeContext;
import railo.transformer.bytecode.BytecodeException;
import railo.transformer.bytecode.statement.FlowControlFinal;
import railo.transformer.bytecode.util.ASMUtil;
import railo.transformer.bytecode.util.Types;
public class TryFinallyVisitor implements Opcodes {
private Label beforeTry;
private Label afterTry;
private Label beforeFinally;
private Label afterFinally;
private int lThrow;
private OnFinally onFinally;
private FlowControlFinal fcf;
public TryFinallyVisitor(OnFinally onFinally, FlowControlFinal fcf) {
this.onFinally=onFinally;
this.fcf=fcf;
}
public void visitTryBegin(BytecodeContext bc) {
GeneratorAdapter ga = bc.getAdapter();
bc.pushOnFinally(onFinally);
beforeTry = new Label();
afterTry = new Label();
beforeFinally = new Label();
afterFinally = new Label();
ga.visitLabel(beforeTry);
}
public void visitTryEnd(BytecodeContext bc) throws BytecodeException {
GeneratorAdapter ga = bc.getAdapter();
bc.popOnFinally();
ga.visitJumpInsn(GOTO, beforeFinally);
ga.visitLabel(afterTry);
lThrow = ga.newLocal(Types.THROWABLE);
ga.storeLocal(lThrow);
onFinally.writeOut(bc);
ga.loadLocal(lThrow);
ga.visitInsn(ATHROW);
ga.visitLabel(beforeFinally);
onFinally.writeOut(bc);
if(fcf!=null && fcf.getAfterFinalGOTOLabel()!=null) {
Label _end=new Label();
ga.visitJumpInsn(Opcodes.GOTO, _end); // ignore when coming not from break/continue
ASMUtil.visitLabel(ga,fcf.getFinalEntryLabel());
onFinally.writeOut(bc);
ga.visitJumpInsn(Opcodes.GOTO, fcf.getAfterFinalGOTOLabel());
ga.visitLabel(_end);
}
ga.visitLabel(afterFinally);
ga.visitTryCatchBlock(beforeTry, afterTry, afterTry, null);
}
}