org.jikesrvm.osr.ia32

Class OptExecutionStateExtractor

java.lang.Object

org.jikesrvm.osr.ExecutionStateExtractor

org.jikesrvm.osr.ia32.OptExecutionStateExtractor

public final class OptExecutionStateExtractor
extends ExecutionStateExtractor

OptExecutionStateExtractor is a subclass of ExecutionStateExtractor. It extracts the execution state from an optimized activation.

Constructor Summary

Constructors

Constructor and Description
OptExecutionStateExtractor()

Method Summary

Modifier and Type	Method and Description
private static void	dumpRegisterContent(WordArray gprs)
private static void	dumpStackContent(byte[] stack, Offset fpOffset)
ExecutionState	extractState(RVMThread thread, Offset osrFPoff, Offset methFPoff, int cmid)
private static double	getDoubleFrom(int vtype, int value, byte[] stack, Offset fpOffset, TempRegisters registers)
private ExecutionState	getExecStateSequence(RVMThread thread, byte[] stack, Offset ipOffset, Offset fpOffset, int cmid, Offset tsFPOffset, TempRegisters registers, EncodedOSRMap osrmap)
private static int	getIntBitsFrom(int vtype, int value, byte[] stack, Offset fpOffset, TempRegisters registers)
private static long	getLongBitsFrom(int vtypeHigh, int valueHigh, int vtypeLow, int valueLow, byte[] stack, Offset fpOffset, TempRegisters registers)
private static Object	getObjectFrom(int vtype, int value, byte[] stack, Offset fpOffset, TempRegisters registers)
private void	restoreValuesFromOptSaveVolatile(byte[] stack, Offset osrFPoff, TempRegisters registers, int regmap, CompiledMethod cm)
private static void	walkOnStack(byte[] stack, Offset fpOffset)

Methods inherited from class org.jikesrvm.osr.ExecutionStateExtractor

printStackTraces

Methods inherited from class java.lang.Object

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

Constructor Detail

OptExecutionStateExtractor

public OptExecutionStateExtractor()

Method Detail

extractState

public ExecutionState extractState(RVMThread thread,
                                   Offset osrFPoff,
                                   Offset methFPoff,
                                   int cmid)

Specified by:

extractState in class ExecutionStateExtractor

Parameters:

thread - a suspended RVM thread

osrFPoff - the frame pointer offset of the threadSwitchFrom method

methFPoff - 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).

restoreValuesFromOptSaveVolatile

private void restoreValuesFromOptSaveVolatile(byte[] stack,
                                              Offset osrFPoff,
                                              TempRegisters registers,
                                              int regmap,
                                              CompiledMethod cm)

getExecStateSequence

private ExecutionState getExecStateSequence(RVMThread thread,
                                            byte[] stack,
                                            Offset ipOffset,
                                            Offset fpOffset,
                                            int cmid,
                                            Offset tsFPOffset,
                                            TempRegisters registers,
                                            EncodedOSRMap osrmap)

getIntBitsFrom

private static int getIntBitsFrom(int vtype,
                                  int value,
                                  byte[] stack,
                                  Offset fpOffset,
                                  TempRegisters registers)

getLongBitsFrom

private static long getLongBitsFrom(int vtypeHigh,
                                    int valueHigh,
                                    int vtypeLow,
                                    int valueLow,
                                    byte[] stack,
                                    Offset fpOffset,
                                    TempRegisters registers)

getDoubleFrom

private static double getDoubleFrom(int vtype,
                                    int value,
                                    byte[] stack,
                                    Offset fpOffset,
                                    TempRegisters registers)

getObjectFrom

private static Object getObjectFrom(int vtype,
                                    int value,
                                    byte[] stack,
                                    Offset fpOffset,
                                    TempRegisters registers)

dumpStackContent

private static void dumpStackContent(byte[] stack,
                                     Offset fpOffset)

dumpRegisterContent

private static void dumpRegisterContent(WordArray gprs)

walkOnStack

private static void walkOnStack(byte[] stack,
                                Offset fpOffset)