com.oracle.svm.core.heap

Class StoredContinuationImpl

java.lang.Object

com.oracle.svm.core.heap.StoredContinuationImpl

public final class StoredContinuationImpl
extends Object

Helper class to access a StoredContinuation. Memory layout of a StoredContinuation instance: Each StoredContinuation has a fixed-size header (16 bytes) which stores the size of the instance, after which follows the data of the stored frame(s).

      +-0x0-|-0x4-|-0x8-|-0xa-+
 0x00 | hub | (1) | -  (2)  - | instance header: 1) number of stored frame; 2) size in bytes as long
      +-----------------------+
 0x10 | -  (1)  - | (2) | (3) | 8-byte shared header for all frames: 1) nonmovable address of reference map, which should be same for all frames.
      : more per-frame headers: 8-byte per-frame header: 2) size of frame in bytes; 3) reference map index of frame
      : continuous frame data :
 

Constructor Summary

Constructors

Constructor and Description
StoredContinuationImpl()

Method Summary

Modifier and Type	Method and Description
static byte[]	allocateBuf(StoredContinuation f) A non-uninterruptible function to allocate temporary buffer.
static int	allocateFromCurrentStack(Target_java_lang_Continuation contRef, org.graalvm.word.Pointer rootSp, org.graalvm.word.Pointer leafSp, org.graalvm.nativeimage.c.function.CodePointer leafIp)
static int	allocateFromForeignStack(Target_java_lang_Continuation contRef, org.graalvm.word.Pointer rootSp, org.graalvm.nativeimage.IsolateThread thread)
protected static int	getByteArrayBaseOffset()
static org.graalvm.word.Pointer	payloadFrameStart(StoredContinuation f)
static long	readAllFrameSize(StoredContinuation f)
static int	readFrameCount(StoredContinuation f)
static int	readFrameSize(StoredContinuation f, int frameIndex)
static long	readSize(StoredContinuation f)
static boolean	walkStoredContinuationFromPointer(org.graalvm.word.Pointer baseAddress, ObjectReferenceVisitor visitor, Object holderObject) Copied from InstanceReferenceMapDecoder.walkOffsetsFromPointer(org.graalvm.word.Pointer, com.oracle.svm.core.c.NonmovableArray<java.lang.Byte>, long, com.oracle.svm.core.heap.ObjectReferenceVisitor, java.lang.Object), walk references stored in StoredContinuation object.
static void	writeBuf(StoredContinuation f, byte[] buf)

Methods inherited from class java.lang.Object

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

Constructor Detail

StoredContinuationImpl

public StoredContinuationImpl()

Method Detail

readAllFrameSize

public static long readAllFrameSize(StoredContinuation f)

readSize

public static long readSize(StoredContinuation f)

readFrameCount

public static int readFrameCount(StoredContinuation f)

readFrameSize

public static int readFrameSize(StoredContinuation f,
                                int frameIndex)

payloadFrameStart

public static org.graalvm.word.Pointer payloadFrameStart(StoredContinuation f)

allocateBuf

public static byte[] allocateBuf(StoredContinuation f)

A non-uninterruptible function to allocate temporary buffer.

writeBuf

public static void writeBuf(StoredContinuation f,
                            byte[] buf)

allocateFromCurrentStack

public static int allocateFromCurrentStack(Target_java_lang_Continuation contRef,
                                           org.graalvm.word.Pointer rootSp,
                                           org.graalvm.word.Pointer leafSp,
                                           org.graalvm.nativeimage.c.function.CodePointer leafIp)

allocateFromForeignStack

public static int allocateFromForeignStack(Target_java_lang_Continuation contRef,
                                           org.graalvm.word.Pointer rootSp,
                                           org.graalvm.nativeimage.IsolateThread thread)

walkStoredContinuationFromPointer

public static boolean walkStoredContinuationFromPointer(org.graalvm.word.Pointer baseAddress,
                                                        ObjectReferenceVisitor visitor,
                                                        Object holderObject)

Copied from InstanceReferenceMapDecoder.walkOffsetsFromPointer(org.graalvm.word.Pointer, com.oracle.svm.core.c.NonmovableArray<java.lang.Byte>, long, com.oracle.svm.core.heap.ObjectReferenceVisitor, java.lang.Object), walk references stored in StoredContinuation object.

getByteArrayBaseOffset

protected static int getByteArrayBaseOffset()