public Instruction execute(ThreadInfo ti) { StackFrame frame = ti.getModifiableTopFrame(); float v = frame.popFloat(); frame.pushLong((long) v); return getNext(ti); }
@Override public Instruction execute(ThreadInfo ti) { // We may need to add the case where we have a smybolic index and a concrete array IntegerExpression indexAttr = null; ArrayExpression arrayAttr = null; StackFrame frame = ti.getModifiableTopFrame(); int arrayRef = peekArrayRef(ti); // need to be polymorphic, could be LongArrayStore if (arrayRef == MJIEnv.NULL) { return ti.createAndThrowException("java.lang.NullPointerException"); } // Retrieve the array expression if it was previously in the pathcondition, and store it as an // array attr PCChoiceGenerator temp_cg = (PCChoiceGenerator) ti.getVM().getLastChoiceGeneratorOfType(PCChoiceGenerator.class); if (temp_cg != null) { if (temp_cg .getCurrentPC() .arrayExpressions .containsKey(ti.getElementInfo(ti.getModifiableTopFrame().peek(2)).toString())) { ti.getModifiableTopFrame() .setOperandAttr( 2, temp_cg .getCurrentPC() .arrayExpressions .get(ti.getElementInfo(ti.getModifiableTopFrame().peek(2)).toString())); } } // If only the value is symbolic, we use the concrete instruction if (peekArrayAttr(ti) == null || !(peekArrayAttr(ti) instanceof ArrayExpression)) { // In this case, the array isn't symbolic if (peekIndexAttr(ti) == null || !(peekIndexAttr(ti) instanceof IntegerExpression)) { return super.execute(ti); } } ChoiceGenerator<?> cg; if (!ti.isFirstStepInsn()) { // first time around cg = new PCChoiceGenerator(3); ((PCChoiceGenerator) cg).setOffset(this.position); ((PCChoiceGenerator) cg).setMethodName(this.getMethodInfo().getFullName()); ti.getVM().setNextChoiceGenerator(cg); return this; } else { // this is what really returns results cg = ti.getVM().getChoiceGenerator(); assert (cg instanceof PCChoiceGenerator) : "expected PCChoiceGenerator, got: " + cg; } PathCondition pc; ChoiceGenerator<?> prev_cg = cg.getPreviousChoiceGeneratorOfType(PCChoiceGenerator.class); if (prev_cg == null) pc = new PathCondition(); else pc = ((PCChoiceGenerator) prev_cg).getCurrentPC(); assert pc != null; if (peekIndexAttr(ti) == null || !(peekIndexAttr(ti) instanceof IntegerExpression)) { int index = ti.getTopFrame().peek(1); indexAttr = new IntegerConstant(index); } else { indexAttr = (IntegerExpression) peekIndexAttr(ti); } assert (indexAttr != null) : "indexAttr shouldn't be null in FASTORE instruction"; if (peekArrayAttr(ti) == null || !(peekArrayAttr(ti) instanceof ArrayExpression)) { // In this case, the array isn't symbolic if (peekIndexAttr(ti) == null || !(peekIndexAttr(ti) instanceof IntegerExpression)) { return super.execute(ti); } else { // We create a symbolic array out of the concrete array ElementInfo arrayInfo = ti.getElementInfo(arrayRef); arrayAttr = ArrayExpression.create(arrayInfo.toString(), arrayInfo.arrayLength()); // We add the constraints about all the elements of the array for (int i = 0; i < arrayInfo.arrayLength(); i++) { float arrValue = arrayInfo.getFloatElement(i); pc._addDet( Comparator.EQ, new SelectExpression(arrayAttr, new IntegerConstant(i)), new RealConstant(arrValue)); } } } else { arrayAttr = (ArrayExpression) peekArrayAttr(ti); } assert (arrayAttr != null) : "arrayAttr shouldn't be null in FASTORE instruction"; if ((Integer) cg.getNextChoice() == 1) { // check bounds of the index pc._addDet(Comparator.GE, indexAttr, arrayAttr.length); if (pc.simplify()) { // satisfiable ((PCChoiceGenerator) cg).setCurrentPC(pc); return ti.createAndThrowException( "java.lang.ArrayIndexOutOfBoundsException", "index greater than array bounds"); } else { ti.getVM().getSystemState().setIgnored(true); return getNext(ti); } } else if ((Integer) cg.getNextChoice() == 2) { pc._addDet(Comparator.LT, indexAttr, new IntegerConstant(0)); if (pc.simplify()) { // satisfiable ((PCChoiceGenerator) cg).setCurrentPC(pc); return ti.createAndThrowException( "java.lang.ArrayIndexOutOfBoundsException", "index smaller than array bounds"); } else { ti.getVM().getSystemState().setIgnored(true); return getNext(ti); } } else { pc._addDet(Comparator.LT, indexAttr, arrayAttr.length); pc._addDet(Comparator.GE, indexAttr, new IntegerConstant(0)); if (pc.simplify()) { // satisfiable ((PCChoiceGenerator) cg).setCurrentPC(pc); RealExpression sym_value = null; if (frame.getOperandAttr(0) == null || !(frame.getOperandAttr(0) instanceof RealExpression)) { float value = frame.popFloat(); sym_value = new RealConstant(value); } else { // The value is symbolic. sym_value = (RealExpression) frame.getOperandAttr(0); frame.popFloat(); } // We create a new arrayAttr, and inherits information from the previous attribute ArrayExpression newArrayAttr = new ArrayExpression(arrayAttr); frame.pop(2); // We pop the array and the index RealStoreExpression se = new RealStoreExpression(arrayAttr, indexAttr, sym_value); pc._addDet(Comparator.EQ, se, newArrayAttr); pc.arrayExpressions.put(newArrayAttr.getRootName(), newArrayAttr); return getNext(ti); } else { ti.getVM().getSystemState().setIgnored(true); return getNext(ti); } } }