001/** 002 * 003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved. 004 * 005 * This library is free software; you can redistribute it and/or 006 * modify it under the terms of the GNU Lesser General Public 007 * License as published by the Free Software Foundation; either 008 * version 2.1 of the License, or (at your option) any later version. 009 * 010 * This library is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013 * Lesser General Public License for more details. 014 * 015 * You should have received a copy of the GNU Lesser General Public 016 * License along with this library. If not, see <http://www.gnu.org/licenses/>. 017 * 018 **/ 019package lucee.transformer.bytecode.visitor; 020 021import lucee.transformer.bytecode.BytecodeContext; 022import lucee.transformer.bytecode.BytecodeException; 023import lucee.transformer.bytecode.statement.FlowControlFinal; 024import lucee.transformer.bytecode.util.ASMUtil; 025import lucee.transformer.bytecode.util.Types; 026 027import org.objectweb.asm.Label; 028import org.objectweb.asm.Opcodes; 029import org.objectweb.asm.Type; 030import org.objectweb.asm.commons.GeneratorAdapter; 031 032public class TryCatchFinallyVisitor implements Opcodes { 033 private OnFinally onFinally; 034 private Label beginTry; 035 private Label endTry; 036 private Label endTry2; 037 private Label l3; 038 private Label l4; 039 private Label l5; 040 private Label l6; 041 private Type type=Types.THROWABLE; 042 private FlowControlFinal fcf; 043 044 045 public TryCatchFinallyVisitor(OnFinally onFinally, FlowControlFinal fcf){ 046 this.onFinally=onFinally; 047 this.fcf=fcf; 048 } 049 050 public void visitTryBegin(BytecodeContext bc) { 051 GeneratorAdapter ga = bc.getAdapter(); 052 beginTry = new Label(); 053 endTry = new Label(); 054 endTry2 = new Label(); 055 l3 = new Label(); 056 l4 = new Label(); 057 bc.pushOnFinally(onFinally); 058 ga.visitLabel(beginTry); 059 } 060 061 public int visitTryEndCatchBeging(BytecodeContext bc) { 062 GeneratorAdapter ga = bc.getAdapter(); 063 064 ga.visitTryCatchBlock(beginTry, endTry, endTry2, type.getInternalName()); 065 ga.visitLabel(endTry); 066 l5 = new Label(); 067 ga.visitJumpInsn(GOTO, l5); 068 ga.visitLabel(endTry2); 069 int lThrow = ga.newLocal(type); 070 ga.storeLocal(lThrow); 071 //mv.visitVarInsn(ASTORE, 1); 072 l6 = new Label(); 073 ga.visitLabel(l6); 074 return lThrow; 075 } 076 077 public void visitCatchEnd(BytecodeContext bc) throws BytecodeException { 078 Label end = new Label(); 079 GeneratorAdapter ga = bc.getAdapter(); 080 bc.popOnFinally(); 081 ga.visitLabel(l3); 082 ga.visitJumpInsn(GOTO, l5); 083 ga.visitLabel(l4); 084 int lThrow = ga.newLocal(Types.THROWABLE); 085 ga.storeLocal(lThrow); 086 //mv.visitVarInsn(ASTORE, 2); 087 Label l8 = new Label(); 088 ga.visitLabel(l8); 089 090 onFinally.writeOut(bc); 091 092 ga.loadLocal(lThrow); 093 ga.visitInsn(ATHROW); 094 ga.visitLabel(l5); 095 096 onFinally.writeOut(bc); 097 if(fcf!=null && fcf.getAfterFinalGOTOLabel()!=null) { 098 Label _end=new Label(); 099 ga.visitJumpInsn(Opcodes.GOTO, _end); // ignore when coming not from break/continue 100 ASMUtil.visitLabel(ga,fcf.getFinalEntryLabel()); 101 onFinally.writeOut(bc); 102 ga.visitJumpInsn(Opcodes.GOTO, fcf.getAfterFinalGOTOLabel()); 103 ga.visitLabel(_end); 104 } 105 106 107 108 109 110 ga.visitLabel(end); 111 ga.visitTryCatchBlock(beginTry, l3, l4, null); 112 113 } 114}