Package com.ibm.wala.classLoader

Class CallSiteReference

  • All Implemented Interfaces:
    ContextItem, BytecodeConstants
    public abstract class CallSiteReference
extends ProgramCounter
implements BytecodeConstants, ContextItem
    Simple object that represents a static call site (ie., an invoke instruction in the bytecode) Note that the identity of a call site reference depends on two things: the program counter, and the containing IR. Thus, it suffices to define equals() and hashCode() from ProgramCounter, since this class does not maintain a pointer to the containing IR (or CGNode) anyway. If using a hashtable of CallSiteReference from different IRs, you probably want to use a wrapper which also holds a pointer to the governing CGNode.

    • Constructor Detail

      • CallSiteReference

        protected CallSiteReference​(int programCounter,
                            MethodReference declaredTarget)
        Parameters:
        programCounter - Index into bytecode describing this instruction
        declaredTarget - The method target as declared at the call site

    • Method Detail

      • equals

        public boolean equals​(Object obj)
        Description copied from class: ProgramCounter
        A Program Counter value is enough to uniquely identify a call site reference within a method. Note: must use these objects with extreme care; this only works if you never mix ProgramLocations from different methods in the same collection.
        Overrides:
        equals in class ProgramCounter
        See Also:
        Object.equals(Object)

      • make

        public static CallSiteReference make​(int programCounter,
                                     MethodReference declaredTarget,
                                     IInvokeInstruction.IDispatch invocationCode)
        This factory method plays a little game to avoid storing the invocation code in the object; this saves a byte (probably actually a whole word) in each created object. TODO: Consider canonicalization?

      • getDeclaredTarget

        public MethodReference getDeclaredTarget()
        Return the Method that this call site calls. This represents the method declared in the invoke instruction only.

      • getInvocationCode

        public abstract IInvokeInstruction.IDispatch getInvocationCode()
        Return one of INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, or INVOKEINTERFACE

      • getInvocationString

        public String getInvocationString()

      • isInterface

        public final boolean isInterface()
        Is this an invokeinterface call site?

      • isVirtual

        public final boolean isVirtual()
        Is this an invokevirtual call site?

      • isSpecial

        public final boolean isSpecial()
        Is this an invokespecial call site?

      • isStatic

        public boolean isStatic()
        Is this an invokestatic call site?

      • isFixed

        public boolean isFixed()

      • isDispatch

        public boolean isDispatch()