executionvisitor.java

Java Bytecode Editor 是一个 JAVA 的字节码反汇编和修改器。它可以很方便的修改已经编译成 Class 文件的 JAVA 文件。

		if (o.getMethodName(cpg).equals(Constants.CONSTRUCTOR_NAME)){
			UninitializedObjectType t = (UninitializedObjectType) stack().peek(o.getArgumentTypes(cpg).length);
			if (t == Frame._this){	
				Frame._this = null;
			}
			stack().initializeObject(t);
			locals().initializeObject(t);
		}
		stack().pop();	//objectref
		for (int i=0; i<o.getArgumentTypes(cpg).length; i++){
			stack().pop();
		}
		// We are sure the invoked method will xRETURN eventually
		// We simulate xRETURNs functionality here because we
		// don't really "jump into" and simulate the invoked
		// method.
		if (o.getReturnType(cpg) != Type.VOID){
			Type t = o.getReturnType(cpg);
			if (	t.equals(Type.BOOLEAN)	||
						t.equals(Type.CHAR)			||
						t.equals(Type.BYTE) 		||
						t.equals(Type.SHORT)		)
				t = Type.INT;
			stack().push(t);
		}
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitINVOKESTATIC(INVOKESTATIC o){
		for (int i=0; i<o.getArgumentTypes(cpg).length; i++){
			stack().pop();
		}
		// We are sure the invoked method will xRETURN eventually
		// We simulate xRETURNs functionality here because we
		// don't really "jump into" and simulate the invoked
		// method.
		if (o.getReturnType(cpg) != Type.VOID){
			Type t = o.getReturnType(cpg);
			if (	t.equals(Type.BOOLEAN)	||
						t.equals(Type.CHAR)			||
						t.equals(Type.BYTE) 		||
						t.equals(Type.SHORT)		)
				t = Type.INT;
			stack().push(t);
		}
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitINVOKEVIRTUAL(INVOKEVIRTUAL o){
		stack().pop(); //objectref
		for (int i=0; i<o.getArgumentTypes(cpg).length; i++){
			stack().pop();
		}
		// We are sure the invoked method will xRETURN eventually
		// We simulate xRETURNs functionality here because we
		// don't really "jump into" and simulate the invoked
		// method.
		if (o.getReturnType(cpg) != Type.VOID){
			Type t = o.getReturnType(cpg);
			if (	t.equals(Type.BOOLEAN)	||
						t.equals(Type.CHAR)			||
						t.equals(Type.BYTE) 		||
						t.equals(Type.SHORT)		)
				t = Type.INT;
			stack().push(t);
		}
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitIOR(IOR o){
		stack().pop();
		stack().pop();
		stack().push(Type.INT);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitIREM(IREM o){
		stack().pop();
		stack().pop();
		stack().push(Type.INT);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitIRETURN(IRETURN o){
		stack().pop();
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitISHL(ISHL o){
		stack().pop();
		stack().pop();
		stack().push(Type.INT);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitISHR(ISHR o){
		stack().pop();
		stack().pop();
		stack().push(Type.INT);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitISTORE(ISTORE o){
		locals().set(o.getIndex(), stack().pop());
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitISUB(ISUB o){
		stack().pop();
		stack().pop();
		stack().push(Type.INT);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitIUSHR(IUSHR o){
		stack().pop();
		stack().pop();
		stack().push(Type.INT);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitIXOR(IXOR o){
		stack().pop();
		stack().pop();
		stack().push(Type.INT);
	}

	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitJSR(JSR o){
		stack().push(new ReturnaddressType(o.physicalSuccessor()));
//System.err.println("TODO-----------:"+o.physicalSuccessor());
	}

	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitJSR_W(JSR_W o){
		stack().push(new ReturnaddressType(o.physicalSuccessor()));
	}

	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitL2D(L2D o){
		stack().pop();
		stack().push(Type.DOUBLE);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitL2F(L2F o){
		stack().pop();
		stack().push(Type.FLOAT);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitL2I(L2I o){
		stack().pop();
		stack().push(Type.INT);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLADD(LADD o){
		stack().pop();
		stack().pop();
		stack().push(Type.LONG);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLALOAD(LALOAD o){
		stack().pop();
		stack().pop();
		stack().push(Type.LONG);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLAND(LAND o){
		stack().pop();
		stack().pop();
		stack().push(Type.LONG);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLASTORE(LASTORE o){
		stack().pop();
		stack().pop();
		stack().pop();
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLCMP(LCMP o){
		stack().pop();
		stack().pop();
		stack().push(Type.INT);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLCONST(LCONST o){
		stack().push(Type.LONG);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLDC(LDC o){
		Constant c = cpg.getConstant(o.getIndex());
		if (c instanceof ConstantInteger){
			stack().push(Type.INT);
		}
		if (c instanceof ConstantFloat){
			stack().push(Type.FLOAT);
		}
		if (c instanceof ConstantString){
			stack().push(Type.STRING);
		}
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLDC_W(LDC_W o){
		Constant c = cpg.getConstant(o.getIndex());
		if (c instanceof ConstantInteger){
			stack().push(Type.INT);
		}
		if (c instanceof ConstantFloat){
			stack().push(Type.FLOAT);
		}
		if (c instanceof ConstantString){
			stack().push(Type.STRING);
		}
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLDC2_W(LDC2_W o){
		Constant c = cpg.getConstant(o.getIndex());
		if (c instanceof ConstantLong){
			stack().push(Type.LONG);
		}
		if (c instanceof ConstantDouble){
			stack().push(Type.DOUBLE);
		}
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLDIV(LDIV o){
		stack().pop();
		stack().pop();
		stack().push(Type.LONG);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLLOAD(LLOAD o){
		stack().push(locals().get(o.getIndex()));
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLMUL(LMUL o){
		stack().pop();
		stack().pop();
		stack().push(Type.LONG);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLNEG(LNEG o){
		stack().pop();
		stack().push(Type.LONG);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLOOKUPSWITCH(LOOKUPSWITCH o){
		stack().pop(); //key
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLOR(LOR o){
		stack().pop();
		stack().pop();
		stack().push(Type.LONG);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLREM(LREM o){
		stack().pop();
		stack().pop();
		stack().push(Type.LONG);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLRETURN(LRETURN o){
		stack().pop();
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLSHL(LSHL o){
		stack().pop();
		stack().pop();
		stack().push(Type.LONG);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLSHR(LSHR o){
		stack().pop();
		stack().pop();
		stack().push(Type.LONG);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLSTORE(LSTORE o){
		locals().set(o.getIndex(), stack().pop());
		locals().set(o.getIndex()+1, Type.UNKNOWN);		
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLSUB(LSUB o){
		stack().pop();
		stack().pop();
		stack().push(Type.LONG);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLUSHR(LUSHR o){
		stack().pop();
		stack().pop();
		stack().push(Type.LONG);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitLXOR(LXOR o){
		stack().pop();
		stack().pop();
		stack().push(Type.LONG);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitMONITORENTER(MONITORENTER o){
		stack().pop();
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitMONITOREXIT(MONITOREXIT o){
		stack().pop();
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitMULTIANEWARRAY(MULTIANEWARRAY o){
		for (int i=0; i<o.getDimensions(); i++){
			stack().pop();
		}
		stack().push(o.getType(cpg));
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitNEW(NEW o){
		stack().push(new UninitializedObjectType((ObjectType) (o.getType(cpg))));
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitNEWARRAY(NEWARRAY o){
		stack().pop();
		stack().push(o.getType());
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitNOP(NOP o){
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitPOP(POP o){
		stack().pop();
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitPOP2(POP2 o){
		Type t = stack().pop();
		if (t.getSize() == 1){
			stack().pop();
		}		
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitPUTFIELD(PUTFIELD o){
		stack().pop();
		stack().pop();
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitPUTSTATIC(PUTSTATIC o){
		stack().pop();
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitRET(RET o){
		// do nothing, return address
		// is in in the local variables.
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitRETURN(RETURN o){
		// do nothing.
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitSALOAD(SALOAD o){
		stack().pop();
		stack().pop();
		stack().push(Type.INT);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitSASTORE(SASTORE o){
		stack().pop();
		stack().pop();
		stack().pop();
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitSIPUSH(SIPUSH o){
		stack().push(Type.INT);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitSWAP(SWAP o){
		Type t = stack().pop();
		Type u = stack().pop();
		stack().push(t);
		stack().push(u);
	}
	/** Symbolically executes the corresponding Java Virtual Machine instruction. */ 
	public void visitTABLESWITCH(TABLESWITCH o){
		stack().pop();
	}
}