gov.nasa.jpf.jvm.bytecode

Class VirtualInvocation

java.lang.Object

gov.nasa.jpf.vm.Instruction

gov.nasa.jpf.vm.bytecode.InvokeInstruction

gov.nasa.jpf.jvm.bytecode.JVMInvokeInstruction

gov.nasa.jpf.jvm.bytecode.InstanceInvocation

gov.nasa.jpf.jvm.bytecode.VirtualInvocation

All Implemented Interfaces:

JVMInstruction, Attributable, InstanceInvokeInstruction, InstructionInterface, java.lang.Cloneable

Direct Known Subclasses:

INVOKEINTERFACE, INVOKEVIRTUAL

public abstract class VirtualInvocation
extends InstanceInvocation

a base class for virtual call instructions

Field Summary

Fields inherited from class gov.nasa.jpf.jvm.bytecode.JVMInvokeInstruction

argSize, arguments, cname, invokedMethod, lastObj, mname, signature

Fields inherited from class gov.nasa.jpf.vm.Instruction

attr, insnIndex, mi, position

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	VirtualInvocation()
protected	VirtualInvocation(java.lang.String clsDescriptor, java.lang.String methodName, java.lang.String signature)

Method Summary

Modifier and Type	Method and Description
void	accept(JVMInstructionVisitor insVisitor)
Instruction	execute(ThreadInfo ti) this is the real workhorse returns next instruction to enter in this thread <2do> it's unfortunate we roll every side effect into this method, because it diminishes the value of the 'executeInstruction' notification: all insns that require some sort of late binding (InvokeVirtual, GetField, ..) are not yet fully analyzable (e.g.
java.lang.Object	getFieldValue(java.lang.String id, ThreadInfo ti)
MethodInfo	getInvokedMethod(ThreadInfo ti)
MethodInfo	getInvokedMethod(ThreadInfo ti, int objRef)
protected boolean	isLastUnlock(ElementInfo ei) If the object will still be owned, then the current thread can go on.
protected boolean	isLockOwner(ThreadInfo ti, ElementInfo ei) If the current thread already owns the lock, then the current thread can go on.
java.lang.String	toPostExecString() this can contain additional info that was gathered/cached during execution
Instruction	typeSafeClone(MethodInfo clonedMethod) this is overridden by any Instruction that use a cache for class or method to provide a type safe cloning

Methods inherited from class gov.nasa.jpf.jvm.bytecode.InstanceInvocation

getArgSize, getCalleeThis, getObjectSlot, getThisElementInfo

Methods inherited from class gov.nasa.jpf.jvm.bytecode.JVMInvokeInstruction

getArgumentAttrs, getArgumentValue, getArgumentValues, getFieldOrArgumentValue, getInvokedMethod, getInvokedMethodClassName, getInvokedMethodName, getInvokedMethodSignature, getLastObjRef, getLength, getReturnType, getReturnTypeName, hasArgumentAttr, hasArgumentObjectAttr, isCompleted, isReferenceReturnType, setInvokedMethod, setupCallee

Methods inherited from class gov.nasa.jpf.vm.bytecode.InvokeInstruction

reschedulesLockAcquisition

Methods inherited from class gov.nasa.jpf.vm.Instruction

addAttr, asInstruction, attrIterator, attrIterator, cleanupTransients, getAttr, getAttr, getFileLocation, getFilePos, getInstructionIndex, getLineNumber, getMethodInfo, getMnemonic, getNext, getNext, getNextAttr, getPosition, getPrev, getSourceLine, getSourceLocation, getSourceOrLocation, hasAttr, hasAttr, init, isBackJump, isExtendedInstruction, isFirstInstruction, isMonitorEnterPrologue, isSchedulingRelevant, removeAttr, replaceAttr, requiresClinitExecution, setAttr, setContext, setLocation, setMethodInfo, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface gov.nasa.jpf.vm.bytecode.InstanceInvokeInstruction

getInvokedMethod

Methods inherited from interface gov.nasa.jpf.vm.bytecode.InstructionInterface

asInstruction, getByteCode, getFileLocation, getFilePos, getInstructionIndex, getLength, getLineNumber, getMethodInfo, getMnemonic, getNext, getNext, getPosition, getPrev, getSourceLine, getSourceLocation, isBackJump, isCompleted, isExtendedInstruction, isFirstInstruction

Methods inherited from interface gov.nasa.jpf.util.Attributable

addAttr, attrIterator, attrIterator, getAttr, getAttr, getNextAttr, hasAttr, hasAttr, removeAttr, replaceAttr, setAttr

Constructor Detail

VirtualInvocation

protected VirtualInvocation()

VirtualInvocation

protected VirtualInvocation(java.lang.String clsDescriptor,
                            java.lang.String methodName,
                            java.lang.String signature)

Method Detail

toPostExecString

public java.lang.String toPostExecString()

Description copied from class: Instruction

this can contain additional info that was gathered/cached during execution

Specified by:

toPostExecString in interface InstructionInterface

Overrides:

toPostExecString in class Instruction

execute

public Instruction execute(ThreadInfo ti)

Description copied from class: Instruction

this is the real workhorse returns next instruction to enter in this thread <2do> it's unfortunate we roll every side effect into this method, because it diminishes the value of the 'executeInstruction' notification: all insns that require some sort of late binding (InvokeVirtual, GetField, ..) are not yet fully analyzable (e.g. the callee of InvokeVirtuals is not known yet), putting the burden of duplicating the related code of enter() in the listener. It would be better if we factor this 'prepareExecution' out of enter()

Specified by:

execute in interface InstructionInterface

Specified by:

execute in class Instruction

isLockOwner

protected boolean isLockOwner(ThreadInfo ti,
                              ElementInfo ei)

If the current thread already owns the lock, then the current thread can go on. For example, this is a recursive acquisition.

isLastUnlock

protected boolean isLastUnlock(ElementInfo ei)

If the object will still be owned, then the current thread can go on. For example, all but the last monitorexit for the object.

getInvokedMethod

public MethodInfo getInvokedMethod(ThreadInfo ti)

Specified by:

getInvokedMethod in class JVMInvokeInstruction

getInvokedMethod

public MethodInfo getInvokedMethod(ThreadInfo ti,
                                   int objRef)

getFieldValue

public java.lang.Object getFieldValue(java.lang.String id,
                                      ThreadInfo ti)

Specified by:

getFieldValue in class JVMInvokeInstruction

accept

public void accept(JVMInstructionVisitor insVisitor)

Specified by:

accept in interface JVMInstruction

Overrides:

accept in class InstanceInvocation

typeSafeClone

public Instruction typeSafeClone(MethodInfo clonedMethod)

Description copied from class: Instruction

this is overridden by any Instruction that use a cache for class or method to provide a type safe cloning

Overrides:

typeSafeClone in class JVMInvokeInstruction