com.oracle.graal.hotspot.replacements

Class WriteBarrierSnippets

java.lang.Object

com.oracle.graal.hotspot.replacements.WriteBarrierSnippets

All Implemented Interfaces:

Snippets

public class WriteBarrierSnippets
extends Object
implements Snippets

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	WriteBarrierSnippets.Templates

Field Summary

Fields

Modifier and Type	Field and Description
private static SnippetCounter.Group	countersWriteBarriers
private static SnippetCounter	g1AttemptedPostWriteBarrierCounter
private static SnippetCounter	g1AttemptedPreWriteBarrierCounter
private static SnippetCounter	g1EffectiveAfterNullPostWriteBarrierCounter
private static SnippetCounter	g1EffectiveAfterXORPostWriteBarrierCounter
private static SnippetCounter	g1EffectivePreWriteBarrierCounter
private static SnippetCounter	g1ExecutedPostWriteBarrierCounter
private static SnippetCounter	g1ExecutedPreWriteBarrierCounter
static ForeignCallDescriptor	G1WBPOSTCALL
static ForeignCallDescriptor	G1WBPRECALL
static LocationIdentity	GC_CARD_LOCATION
static LocationIdentity	GC_INDEX_LOCATION
static LocationIdentity	GC_LOG_LOCATION
private static SnippetCounter	serialWriteBarrierCounter
static ForeignCallDescriptor	VALIDATE_OBJECT

Constructor Summary

Constructors

Constructor and Description
WriteBarrierSnippets()

Method Summary

Modifier and Type	Method and Description
static void	g1ArrayRangePostWriteBarrier(Object object, int startIndex, int length, Register threadRegister)
static void	g1ArrayRangePreWriteBarrier(Object object, int startIndex, int length, Register threadRegister)
static void	g1PostBarrierStub(ForeignCallDescriptor descriptor, Word card)
static void	g1PostWriteBarrier(AddressNode.Address address, Object object, Object value, boolean usePrecise, Register threadRegister, boolean trace)
private static void	g1PreBarrierStub(ForeignCallDescriptor descriptor, Object object)
static void	g1PreWriteBarrier(AddressNode.Address address, Object object, Object expectedObject, boolean doLoad, boolean nullCheck, Register threadRegister, boolean trace)
static void	log(boolean enabled, String format, long value) Log method of debugging purposes.
static void	log(boolean enabled, String format, long value1, long value2)
static void	log(boolean enabled, String format, long value1, long value2, long value3)
static void	serialArrayRangeWriteBarrier(Object object, int startIndex, int length)
static void	serialImpreciseWriteBarrier(Object object)
static void	serialPreciseWriteBarrier(AddressNode.Address address)
private static void	serialWriteBarrier(Pointer ptr)
static boolean	traceBarrier()
static void	validateObject(Object parent, Object child) Validation helper method which performs sanity checks on write operations.
private static boolean	validateOop(ForeignCallDescriptor descriptor, Object parent, Object object)

Methods inherited from class java.lang.Object

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

Field Detail

countersWriteBarriers

private static final SnippetCounter.Group countersWriteBarriers

serialWriteBarrierCounter

private static final SnippetCounter serialWriteBarrierCounter

g1AttemptedPreWriteBarrierCounter

private static final SnippetCounter g1AttemptedPreWriteBarrierCounter

g1EffectivePreWriteBarrierCounter

private static final SnippetCounter g1EffectivePreWriteBarrierCounter

g1ExecutedPreWriteBarrierCounter

private static final SnippetCounter g1ExecutedPreWriteBarrierCounter

g1AttemptedPostWriteBarrierCounter

private static final SnippetCounter g1AttemptedPostWriteBarrierCounter

g1EffectiveAfterXORPostWriteBarrierCounter

private static final SnippetCounter g1EffectiveAfterXORPostWriteBarrierCounter

g1EffectiveAfterNullPostWriteBarrierCounter

private static final SnippetCounter g1EffectiveAfterNullPostWriteBarrierCounter

g1ExecutedPostWriteBarrierCounter

private static final SnippetCounter g1ExecutedPostWriteBarrierCounter

GC_CARD_LOCATION

public static final LocationIdentity GC_CARD_LOCATION

GC_LOG_LOCATION

public static final LocationIdentity GC_LOG_LOCATION

GC_INDEX_LOCATION

public static final LocationIdentity GC_INDEX_LOCATION

G1WBPRECALL

public static final ForeignCallDescriptor G1WBPRECALL

G1WBPOSTCALL

public static final ForeignCallDescriptor G1WBPOSTCALL

VALIDATE_OBJECT

public static final ForeignCallDescriptor VALIDATE_OBJECT

Constructor Detail

WriteBarrierSnippets

public WriteBarrierSnippets()

Method Detail

serialWriteBarrier

private static void serialWriteBarrier(Pointer ptr)

serialImpreciseWriteBarrier

public static void serialImpreciseWriteBarrier(Object object)

serialPreciseWriteBarrier

public static void serialPreciseWriteBarrier(AddressNode.Address address)

serialArrayRangeWriteBarrier

public static void serialArrayRangeWriteBarrier(Object object,
                                                int startIndex,
                                                int length)

g1PreWriteBarrier

public static void g1PreWriteBarrier(AddressNode.Address address,
                                     Object object,
                                     Object expectedObject,
                                     boolean doLoad,
                                     boolean nullCheck,
                                     Register threadRegister,
                                     boolean trace)

g1PostWriteBarrier

public static void g1PostWriteBarrier(AddressNode.Address address,
                                      Object object,
                                      Object value,
                                      boolean usePrecise,
                                      Register threadRegister,
                                      boolean trace)

g1ArrayRangePreWriteBarrier

public static void g1ArrayRangePreWriteBarrier(Object object,
                                               int startIndex,
                                               int length,
                                               Register threadRegister)

g1ArrayRangePostWriteBarrier

public static void g1ArrayRangePostWriteBarrier(Object object,
                                                int startIndex,
                                                int length,
                                                Register threadRegister)

g1PreBarrierStub

private static void g1PreBarrierStub(ForeignCallDescriptor descriptor,
                                     Object object)

g1PostBarrierStub

public static void g1PostBarrierStub(ForeignCallDescriptor descriptor,
                                     Word card)

log

public static void log(boolean enabled,
                       String format,
                       long value)

Log method of debugging purposes.

log

public static void log(boolean enabled,
                       String format,
                       long value1,
                       long value2)

log

public static void log(boolean enabled,
                       String format,
                       long value1,
                       long value2,
                       long value3)

traceBarrier

public static boolean traceBarrier()

validateObject

public static void validateObject(Object parent,
                                  Object child)

Validation helper method which performs sanity checks on write operations. The addresses of both the object and the value being written are checked in order to determine if they reside in a valid heap region. If an object is stale, an invalid access is performed in order to prematurely crash the VM and debug the stack trace of the faulty method.

validateOop

private static boolean validateOop(ForeignCallDescriptor descriptor,
                                   Object parent,
                                   Object object)