com.oracle.graal.hotspot.stubs

Class UnwindExceptionToCallerStub

java.lang.Object

com.oracle.graal.hotspot.stubs.Stub

com.oracle.graal.hotspot.stubs.SnippetStub

com.oracle.graal.hotspot.stubs.UnwindExceptionToCallerStub

All Implemented Interfaces:

Snippets

public class UnwindExceptionToCallerStub
extends SnippetStub

Stub called by an UnwindNode. This stub executes in the frame of the method throwing an exception and completes by jumping to the exception handler in the calling frame.

Field Summary

Fields

Modifier and Type	Field and Description
static ForeignCallDescriptor	EXCEPTION_HANDLER_FOR_RETURN_ADDRESS

Fields inherited from class com.oracle.graal.hotspot.stubs.SnippetStub

method, SnippetGraphUnderConstruction

Fields inherited from class com.oracle.graal.hotspot.stubs.Stub

code, compResult, linkage, providers

Constructor Summary

Constructors

Constructor and Description
UnwindExceptionToCallerStub(HotSpotProviders providers, HotSpotForeignCallLinkage linkage)

Method Summary

Modifier and Type	Method and Description
private static boolean	assertionsEnabled() Determines if either Java assertions are enabled for UnwindExceptionToCallerStub or if this is a HotSpot build where the ASSERT mechanism is enabled.
static Word	exceptionHandlerForReturnAddress(ForeignCallDescriptor exceptionHandlerForReturnAddress, Word thread, Word returnAddress)
protected Object	getConstantParameterValue(int index, String name)
private static boolean	logging()
boolean	preservesRegisters() The current frame is unwound by this stub.
private static void	unwindExceptionToCaller(Object exception, Word returnAddress, Register threadRegister)

Methods inherited from class com.oracle.graal.hotspot.stubs.SnippetStub

checkConstArg, debugScopeContext, getGraph, getInstalledCodeOwner, makeConstArgs, toString

Methods inherited from class com.oracle.graal.hotspot.stubs.Stub

getCode, getCompilationResult, getDestroyedRegisters, getLinkage, getRegisterConfig, getStubs, initDestroyedRegisters

Methods inherited from class java.lang.Object

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

Field Detail

EXCEPTION_HANDLER_FOR_RETURN_ADDRESS

public static final ForeignCallDescriptor EXCEPTION_HANDLER_FOR_RETURN_ADDRESS

Constructor Detail

UnwindExceptionToCallerStub

public UnwindExceptionToCallerStub(HotSpotProviders providers,
                                   HotSpotForeignCallLinkage linkage)

Method Detail

preservesRegisters

public boolean preservesRegisters()

The current frame is unwound by this stub. Therefore, it does not need to save any registers as HotSpot uses a caller save convention.

Overrides:

preservesRegisters in class Stub

getConstantParameterValue

protected Object getConstantParameterValue(int index,
                                           String name)

Overrides:

getConstantParameterValue in class SnippetStub

unwindExceptionToCaller

private static void unwindExceptionToCaller(Object exception,
                                            Word returnAddress,
                                            Register threadRegister)

logging

private static boolean logging()

assertionsEnabled

private static boolean assertionsEnabled()

Determines if either Java assertions are enabled for UnwindExceptionToCallerStub or if this is a HotSpot build where the ASSERT mechanism is enabled.

This first check relies on the per-class assertion status which is why this method must be in this class.

exceptionHandlerForReturnAddress

public static Word exceptionHandlerForReturnAddress(ForeignCallDescriptor exceptionHandlerForReturnAddress,
                                                    Word thread,
                                                    Word returnAddress)