List of usage examples for org.aspectj.apache.bcel.generic Instruction toString
@Override
public String toString()
From source file:br.jabuti.graph.datastructure.ig.InstructionNode.java
License:Open Source License
/** <p> This is the method that calculates the efect of this instruction in a given configuration of the stack and local variables. It also inserts the uses and definitions in the sets use/def of this instruction </p> //from w w w . j ava 2 s. c o m @param st The initial stack on which the instruction will be applied; it may be changed by the instruction and hold the result of executiong it; @param st The initial local variables on which the instruction will be applied; it may be changed by the instruction and hold the result of executing it; @param cp The constant pool of the class @throws InvalidInstructionExceptio If this object does not correspond to a valid JVM instruction. Should not occour. @param InvalidStackArgument If the stack or local variables have in a given spot a type that is not compatible with the instruction. */ public void execInstruction(VMStack st, VMLocal locals, ConstantPoolGen cp) throws InvalidInstructionException, InvalidStackArgument { // int delta = ih.getInstruction().produceStack(cp) // - ih.getInstruction().consumeStack(cp); Instruction ins = ih.getInstruction(); if (ins instanceof ACONST_NULL) { st.push(new VMStackElement(Type.NULL, DONT_CARE, this)); } else if (ins instanceof DNEG || ins instanceof FNEG || ins instanceof INEG || ins instanceof LNEG) { setStackArgs(st, 1); Type t1 = ((ArithmeticInstruction) ins).getType(cp); st.pop(1); VMStackElement vme = new VMStackElement(t1, DONT_CARE, this); st.push(vme); } else if (ins instanceof ArithmeticInstruction) { setStackArgs(st, 2); Type t1 = ((ArithmeticInstruction) ins).getType(cp); st.pop(2); VMStackElement vme = new VMStackElement(t1, DONT_CARE, this); st.push(vme); } else if (ins instanceof ArrayInstruction) { // Type t = ((ArrayInstruction) ins).getType(cp); int k = (ins instanceof StackProducer) ? 0 : 1; // t1 = tipo do indice (inteiro) // Type t1 = st.top(k).type; // t2 o tipo do array por exemplo int[] Type t3, t2 = st.top(k + 1).type; // t3 o tipo do elemento a ser armazenado p.e. int se t2 = int[] if (t2 instanceof ArrayType) { t3 = ((ArrayType) t2).getElementType(); } else { throw new InvalidStackArgument("Instruction " + ins + " requires an array reference"); } // adiciona [] na indicacao da origem do array. // por exemplo L@1[] String defUse = st.top(k + 1).defuse + "[]"; if (k == 0) // is a LOAD instruction { setStackArgs(st, 2); VMStackElement vme = new VMStackElement(t3, defUse, this); st.pop(2); st.push(vme); useArrayAdd(defUse); } else // is a STORE { setStackArgs(st, 2); st.pop(3); defArrayAdd(defUse); } } else if (ins instanceof ARRAYLENGTH || ins instanceof INSTANCEOF) { setStackArgs(st, 1); VMStackElement vme = new VMStackElement(Type.INT, DONT_CARE, this); st.pop(); st.push(vme); } else if (ins instanceof ATHROW) { setStackArgs(st, 1); VMStackElement vme = st.top(); vme.producer = this; st.reset(); st.push(vme); } else if (ins instanceof ConstantPushInstruction) { ConstantPushInstruction iins = (ConstantPushInstruction) ins; VMStackElement vme = new VMStackElement(iins.getType(cp), DONT_CARE, this); st.push(vme); } else if (ins instanceof JsrInstruction) { JsrInstruction iins = (JsrInstruction) ins; // InstructionHandle jr = iins.physicalSuccessor(); VMStackElement vme = new VMStackElement(iins.getType(cp), DONT_CARE, this); st.push(vme); } else if (ins instanceof BranchInstruction) { setStackArgs2(st, ins.consumeStack(cp)); st.pop2(ins.consumeStack(cp)); } else if (ins instanceof PUTFIELD) { setStackArgs(st, 2); st.pop(); String defUse = st.top().defuse; st.pop(); defFieldAdd(defUse + "." + ((PUTFIELD) ins).getFieldName(cp)); } else if (ins instanceof PUTSTATIC) { setStackArgs(st, 1); st.pop(1); defFieldAdd(STR_STATIC + ((PUTSTATIC) ins).getClassName(cp) + "." + ((PUTSTATIC) ins).getFieldName(cp)); } else if (ins instanceof ConversionInstruction) { setStackArgs(st, 1); ConversionInstruction iins = (ConversionInstruction) ins; VMStackElement vme = new VMStackElement(iins.getType(cp), DONT_CARE, this); st.pop(); st.push(vme); } else if (ins instanceof NEW) { TypedInstruction iins = (TypedInstruction) ins; VMStackElement vme = new VMStackElement(iins.getType(cp), DONT_CARE, this); st.push(vme); } else if (ins instanceof MULTIANEWARRAY) { setStackArgs2(st, ins.consumeStack(cp)); MULTIANEWARRAY iins = (MULTIANEWARRAY) ins; VMStackElement vme = new VMStackElement(iins.getType(cp), DONT_CARE, this); st.pop2(ins.consumeStack(cp)); st.push(vme); } else if (ins instanceof ANEWARRAY) { ANEWARRAY iins = (ANEWARRAY) ins; VMStackElement vme = new VMStackElement(new ArrayType(iins.getType(cp), 1), DONT_CARE, this); st.pop(); st.push(vme); } else if (ins instanceof NEWARRAY) { setStackArgs(st, 1); NEWARRAY iins = (NEWARRAY) ins; VMStackElement vme = new VMStackElement(iins.getType(), DONT_CARE, this); st.pop(); st.push(vme); } else if (ins instanceof LDC || ins instanceof LDC2_W) { TypedInstruction iins = (TypedInstruction) ins; VMStackElement vme = new VMStackElement(iins.getType(cp), DONT_CARE, this); st.push(vme); } else if (ins instanceof DCMPG || ins instanceof DCMPL || ins instanceof FCMPG || ins instanceof FCMPL || ins instanceof LCMP) { setStackArgs(st, 2); VMStackElement vme = new VMStackElement(Type.INT, DONT_CARE, this); st.pop(2); st.push(vme); } else if (ins instanceof MONITORENTER || ins instanceof MONITOREXIT || ins instanceof POP || ins instanceof POP2) { setStackArgs(st, 1); st.pop(); } else if (ins instanceof RETURN) { st.reset(); } else if (ins instanceof ReturnInstruction) { setStackArgs(st, 1); st.reset(); } else if (ins instanceof SWAP) { setStackArgs(st, 2); VMStackElement vme = new VMStackElement(st.top()); st.pop(); VMStackElement vme1 = new VMStackElement(st.top()); st.pop(); st.push(vme); st.push(vme1); } else if (ins instanceof DUP) { setStackArgs(st, 1); VMStackElement vme = new VMStackElement(st.top()); vme.defuse = DONT_CARE; st.push(vme); } else if (ins instanceof DUP2) { setStackArgs2(st, 2); VMStackElement[] vme = new VMStackElement[2]; int k = 0, sum = 0; while (sum < 2) { vme[k] = st.top(); sum += vme[k++].type.getSize(); st.pop(); } for (int i = k - 1; i >= 0; i--) { VMStackElement vme1 = new VMStackElement(vme[i]); vme1.defuse = DONT_CARE; st.push(vme1); } for (int i = k - 1; i >= 0; i--) { st.push(vme[i]); } } else if (ins instanceof DUP_X1) { setStackArgs(st, 2); VMStackElement vme = st.top(); st.pop(); VMStackElement vme1 = new VMStackElement(vme); vme1.defuse = DONT_CARE; VMStackElement vme2 = st.top(); st.pop(); st.push(vme1); st.push(vme2); st.push(vme); } else if (ins instanceof DUP2_X1) { setStackArgs2(st, 3); VMStackElement[] vme = new VMStackElement[2]; int k = 0, sum = 0; while (sum < 2) { vme[k] = st.top(); sum += vme[k++].type.getSize(); st.pop(); } VMStackElement vme1 = st.top(); st.pop(); for (int i = k - 1; i >= 0; i--) { VMStackElement vme2 = new VMStackElement(vme[i]); vme2.defuse = DONT_CARE; st.push(vme2); } st.push(vme1); for (int i = k - 1; i >= 0; i--) { st.push(vme[i]); } } else if (ins instanceof DUP_X2) { setStackArgs2(st, 3); VMStackElement[] vme = new VMStackElement[3]; int k = 0, sum = 0; while (sum < 3) { vme[k] = st.top(); sum += vme[k++].type.getSize(); st.pop(); } VMStackElement vme1 = new VMStackElement(vme[0]); vme1.defuse = DONT_CARE; st.push(vme1); for (int i = k - 1; i >= 0; i--) { st.push(vme[i]); } } else if (ins instanceof DUP2_X2) { setStackArgs2(st, 4); VMStackElement[] vme = new VMStackElement[2]; int k = 0, j = 0, sum = 0; while (sum < 2) { vme[k] = st.top(); sum += vme[k++].type.getSize(); st.pop(); } VMStackElement[] vme1 = new VMStackElement[2]; while (sum < 4) { vme1[j] = st.top(); sum += vme1[j++].type.getSize(); st.pop(); } for (int i = k - 1; i >= 0; i--) { VMStackElement vme2 = new VMStackElement(vme[i]); vme2.defuse = DONT_CARE; st.push(vme2); } for (int i = j - 1; i >= 0; i--) { st.push(vme1[i]); } for (int i = k - 1; i >= 0; i--) { st.push(vme[i]); } } else if (ins instanceof LoadInstruction) { LoadInstruction iins = (LoadInstruction) ins; int index = iins.getIndex(); setLocalArg(locals, index); useLocalAdd(STR_LOCAL + index); if (locals.get(index) == null) { throw new InvalidStackArgument("Trying to load " + "uninitialized element"); } VMStackElement vme = new VMStackElement(locals.get(index), STR_LOCAL + index, this); st.push(vme); } else if (ins instanceof StoreInstruction) { setStackArgs(st, 1); StoreInstruction iins = (StoreInstruction) ins; int index = iins.getIndex(); defLocalAdd(STR_LOCAL + index); VMStackElement vme = st.top(); st.pop(); locals.add(vme.type, index); } else if (ins instanceof InvokeInstruction) { // verifica se eh uma chamada de super. // para isso verifica se o methodo chamado eh <init> // e se o objeto sendo usado eh L@0 if (ins instanceof INVOKESPECIAL) { INVOKESPECIAL iesp = (INVOKESPECIAL) ins; if (iesp.getName(cp).equals("<init>")) { Type[] t = iesp.getArgumentTypes(cp); VMStackElement el = st.top(t.length); if (el.defuse.equals(STR_LOCAL + "0")) { isSuper = true; } } } setStackArgs2(st, ins.consumeStack(cp)); InvokeInstruction iins = (InvokeInstruction) ins; VMStackElement vme = new VMStackElement(iins.getReturnType(cp), DONT_CARE, this); st.pop2(ins.consumeStack(cp)); st.push(vme); } else if (ins instanceof GETSTATIC) { FieldInstruction iins = (FieldInstruction) ins; String defUse = STR_STATIC + iins.getClassName(cp) + "." + iins.getFieldName(cp); VMStackElement vme = new VMStackElement(iins.getFieldType(cp), defUse, this); useFieldAdd(defUse); st.push(vme); } else if (ins instanceof GETFIELD) { setStackArgs(st, 1); FieldInstruction iins = (FieldInstruction) ins; String defUse = st.top().defuse + "." + iins.getFieldName(cp); VMStackElement vme = new VMStackElement(iins.getFieldType(cp), defUse, this); useFieldAdd(defUse); st.pop(1); st.push(vme); } else if (ins instanceof BREAKPOINT || ins instanceof IMPDEP1 || ins instanceof IMPDEP2 || ins instanceof NOP) { ; } else if (ins instanceof RET) { IndexedInstruction iins = (IndexedInstruction) ins; int index = iins.getIndex(); setLocalArg(locals, index); } else if (ins instanceof CHECKCAST) { setStackArgs(st, 1); } else if (ins instanceof IINC) { String defUse = STR_LOCAL + ((IINC) ins).getIndex(); useLocalAdd(defUse); defLocalAdd(defUse); } else { throw new InvalidInstructionException(ins.toString()); } }