org.jikesrvm.osr

Class ExecutionStateExtractor

java.lang.Object

org.jikesrvm.osr.ExecutionStateExtractor

Direct Known Subclasses:

BaselineExecutionStateExtractor, OptExecutionStateExtractor

public abstract class ExecutionStateExtractor
extends Object

A ExecutionStateExtractor extracts a runtime state (VM scope descriptor) of a method activation. The implementation depends on compilers and hardware architectures.

It returns a compiler and architecture neutered runtime state ExecutionState.

Constructor Summary

Constructors

Constructor and Description
ExecutionStateExtractor()

Method Summary

Modifier and Type	Method and Description
abstract ExecutionState	extractState(RVMThread thread, Offset tsFromFPoff, Offset ypTakenFPoff, int cmid)
static void	printStackTraces(int[] stack, Offset osrFPoff)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExecutionStateExtractor

public ExecutionStateExtractor()

Method Detail

extractState

public abstract ExecutionState extractState(RVMThread thread,
                                            Offset tsFromFPoff,
                                            Offset ypTakenFPoff,
                                            int cmid)

Parameters:

thread - a suspended RVM thread

tsFromFPoff - the frame pointer offset of the threadSwitchFrom method

ypTakenFPoff - the frame pointer offset of the real method where yield point was taken. tsFrom is the callee of ypTaken

cmid - the compiled method id of ypTaken

Returns:

a VM scope descriptor (ExecutionState) for a compiled method on the top of a thread stack, (or a list of descriptors for an inlined method).

printStackTraces

public static void printStackTraces(int[] stack,
                                    Offset osrFPoff)