Package com.ibm.wala.ssa

Class SSAGetCaughtExceptionInstruction

java.lang.Object
com.ibm.wala.ssa.SSAInstruction
com.ibm.wala.ssa.SSAGetCaughtExceptionInstruction
public class SSAGetCaughtExceptionInstruction extends SSAInstruction
A "catch" instruction, inserted at the head of a catch block, which assigns a pending exception object to a local variable.

In SSA IRs, these instructions do not appear in the normal instruction array returned by IR.getInstructions(); instead these instructions live in ISSABasicBlock.

  • Constructor Details

    • SSAGetCaughtExceptionInstruction

      public SSAGetCaughtExceptionInstruction(int iindex, int bbNumber, int exceptionValueNumber)

  • Method Details

    • copyForSSA

      public SSAInstruction copyForSSA(SSAInstructionFactory insts, int[] defs, int[] uses)
      Description copied from class: SSAInstruction
      This method is meant to be used during SSA conversion for an IR that is not in SSA form. It creates a new SSAInstruction of the same type as the receiver, with a combination of the receiver's uses and defs and those from the method parameters.

      In particular, if the 'defs' parameter is null, then the new instruction has the same defs as the receiver. If 'defs' is not null, it must be an array with a size equal to the number of defs that the receiver instruction has. In this case, the new instruction has defs taken from the array. The uses of the new instruction work in the same way with the 'uses' parameter.

      Note that this only applies to CAst-based IR translation, since Java bytecode-based IR generation uses a different SSA construction mechanism.

      TODO: move this into the SSAInstructionFactory

      Specified by:
      copyForSSA in class SSAInstruction

    • toString

      public String toString(SymbolTable symbolTable)
      Specified by:
      toString in class SSAInstruction

    • visit

      public void visit(SSAInstruction.IVisitor v)
      Description copied from class: SSAInstruction
      Apply an IVisitor to this instruction. We invoke the appropriate IVisitor method according to the type of this instruction.
      Specified by:
      visit in class SSAInstruction

    • getException

      public int getException()
      Returns the result.
      Returns:
      int

    • hasDef

      public boolean hasDef()
      Description copied from class: SSAInstruction
      Does this instruction define a normal value, as distinct from a set of exceptions possibly thrown by it (e.g. for invoke instructions).
      Overrides:
      hasDef in class SSAInstruction
      Returns:
      true if the instruction does define a proper value.
      See Also:

    • getDef

      public int getDef()
      Overrides:
      getDef in class SSAInstruction

    • getDef

      public int getDef(int i)
      Description copied from class: SSAInstruction
      Return the ith def
      Overrides:
      getDef in class SSAInstruction
      Parameters:
      i - number of the def, starting at 0.

    • getNumberOfDefs

      public int getNumberOfDefs()
      Overrides:
      getNumberOfDefs in class SSAInstruction

    • getBasicBlockNumber

      public int getBasicBlockNumber()

    • hashCode

      public int hashCode()
      Specified by:
      hashCode in class SSAInstruction

    • isFallThrough

      public boolean isFallThrough()
      Specified by:
      isFallThrough in class SSAInstruction
      Returns:
      true iff this instruction may fall through to the next