com.oracle.svm.core.graal.snippets

Class StackOverflowCheckImpl

java.lang.Object

com.oracle.svm.core.graal.snippets.StackOverflowCheckImpl

All Implemented Interfaces:

StackOverflowCheck

public final class StackOverflowCheckImpl
extends Object
implements StackOverflowCheck

Nested Class Summary

Nested classes/interfaces inherited from interface com.oracle.svm.core.stack.StackOverflowCheck

StackOverflowCheck.Options, StackOverflowCheck.OSSupport

Field Summary

Fields

Modifier and Type	Field and Description
static FastThreadLocalWord<org.graalvm.word.UnsignedWord>	stackBoundaryTL
static SnippetRuntime.SubstrateForeignCallDescriptor	THROW_CACHED_STACK_OVERFLOW_ERROR
static SnippetRuntime.SubstrateForeignCallDescriptor	THROW_NEW_STACK_OVERFLOW_ERROR

Constructor Summary

Constructors

Constructor and Description
StackOverflowCheckImpl()

Method Summary

Modifier and Type	Method and Description
static long	computeDeoptFrameSize(org.graalvm.compiler.nodes.StructuredGraph graph)
void	disableStackOverflowChecksForFatalError() Disables all stack overflow checks for this thread.
void	initialize(org.graalvm.nativeimage.IsolateThread thread) Called for each thread when the thread is attached to the VM.
boolean	isYellowZoneAvailable() Check if the yellow zone of the stack available for usage.
void	makeYellowZoneAvailable() Make the yellow zone of the stack available for usage.
static boolean	needStackOverflowCheck(SharedMethod method)
void	protectYellowZone() The inverse operation of StackOverflowCheck.makeYellowZoneAvailable().
void	updateStackOverflowBoundary() Updates the stack overflow boundary of the current thread.
int	yellowAndRedZoneSize() Returns the combined size of the yellow and red zone.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.oracle.svm.core.stack.StackOverflowCheck

singleton

Field Detail

stackBoundaryTL

public static final FastThreadLocalWord<org.graalvm.word.UnsignedWord> stackBoundaryTL

THROW_CACHED_STACK_OVERFLOW_ERROR

public static final SnippetRuntime.SubstrateForeignCallDescriptor THROW_CACHED_STACK_OVERFLOW_ERROR

THROW_NEW_STACK_OVERFLOW_ERROR

public static final SnippetRuntime.SubstrateForeignCallDescriptor THROW_NEW_STACK_OVERFLOW_ERROR

Constructor Detail

StackOverflowCheckImpl

public StackOverflowCheckImpl()

Method Detail

initialize

public void initialize(org.graalvm.nativeimage.IsolateThread thread)

Description copied from interface: StackOverflowCheck

Called for each thread when the thread is attached to the VM. The method is called very early, before the thread register and the heap are being set up. Therefore, the implementation is severly limited to only operate on C memory and calling C fuctions.

Specified by:

initialize in interface StackOverflowCheck

makeYellowZoneAvailable

public void makeYellowZoneAvailable()

Description copied from interface: StackOverflowCheck

Make the yellow zone of the stack available for usage. It must be eventually followed by a call to StackOverflowCheck.protectYellowZone(). Nested calls are supported: if the yellow zone is already available, this function is a no-op.

Specified by:

makeYellowZoneAvailable in interface StackOverflowCheck

isYellowZoneAvailable

public boolean isYellowZoneAvailable()

Description copied from interface: StackOverflowCheck

Check if the yellow zone of the stack available for usage.

Specified by:

isYellowZoneAvailable in interface StackOverflowCheck

protectYellowZone

public void protectYellowZone()

Description copied from interface: StackOverflowCheck

The inverse operation of StackOverflowCheck.makeYellowZoneAvailable().

Specified by:

protectYellowZone in interface StackOverflowCheck

yellowAndRedZoneSize

public int yellowAndRedZoneSize()

Description copied from interface: StackOverflowCheck

Returns the combined size of the yellow and red zone.

Specified by:

yellowAndRedZoneSize in interface StackOverflowCheck

disableStackOverflowChecksForFatalError

public void disableStackOverflowChecksForFatalError()

Description copied from interface: StackOverflowCheck

Disables all stack overflow checks for this thread. This operation is not reversible, i.e., it must only be called in the case of a fatal error where the VM is going to exit soon and does not execute user code anymore that relies on proper stack overflow checking.

Specified by:

disableStackOverflowChecksForFatalError in interface StackOverflowCheck

updateStackOverflowBoundary

public void updateStackOverflowBoundary()

Description copied from interface: StackOverflowCheck

Updates the stack overflow boundary of the current thread.

Specified by:

updateStackOverflowBoundary in interface StackOverflowCheck

needStackOverflowCheck

public static boolean needStackOverflowCheck(SharedMethod method)

computeDeoptFrameSize

public static long computeDeoptFrameSize(org.graalvm.compiler.nodes.StructuredGraph graph)