Class LocalMap

java.lang.Object

com.ibm.j9ddr.vm29.j9.stackmap.LocalMap

public class LocalMap
extends Object

Provides subset of function in stackmap/localmap.c

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DOUBLE_ACCESS
static final int	ENCODED_INDEX
static final int	ENCODED_MASK
static final int	INT
static final int	NOT_FOUND
static final int	OBJ
static final int	OBJECT_ACCESS
static final int	SINGLE_ACCESS
static final int	WALKED
static final int	WIDE_INDEX
static final int	WRITE_ACCESS

Constructor Summary

Constructors

Constructor	Description
LocalMap()

Method Summary

Modifier and Type	Method	Description
static void	j9localmap_ArgBitsForPC0(com.ibm.j9ddr.vm29.pointer.generated.J9ROMMethodPointer romMethod, int[] resultsArray)
static int	j9localmap_LocalBitsForPC(com.ibm.j9ddr.vm29.pointer.generated.J9ROMMethodPointer romMethod, UDATA pc, int[] resultsArray)	Builds a map of stack use for supplied ROMmethod.

Methods declared in class Object

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

Field Details

ENCODED_INDEX

public static final int ENCODED_INDEX

See Also:

• Constant Field Values

ENCODED_MASK

public static final int ENCODED_MASK

See Also:

• Constant Field Values

WIDE_INDEX

public static final int WIDE_INDEX

See Also:

• Constant Field Values

DOUBLE_ACCESS

public static final int DOUBLE_ACCESS

See Also:

• Constant Field Values

SINGLE_ACCESS

public static final int SINGLE_ACCESS

See Also:

• Constant Field Values

OBJECT_ACCESS

public static final int OBJECT_ACCESS

See Also:

• Constant Field Values

WRITE_ACCESS

public static final int WRITE_ACCESS

See Also:

• Constant Field Values

INT

public static final int INT

See Also:

• Constant Field Values

OBJ

public static final int OBJ

See Also:

• Constant Field Values

NOT_FOUND

public static final int NOT_FOUND

See Also:

• Constant Field Values

WALKED

public static final int WALKED

See Also:

• Constant Field Values

Constructor Details

LocalMap

public LocalMap()

Method Details

j9localmap_ArgBitsForPC0

public static void j9localmap_ArgBitsForPC0(com.ibm.j9ddr.vm29.pointer.generated.J9ROMMethodPointer romMethod,
 int[] resultsArray)
                                     throws CorruptDataException

Throws:

CorruptDataException

j9localmap_LocalBitsForPC

public static int j9localmap_LocalBitsForPC(com.ibm.j9ddr.vm29.pointer.generated.J9ROMMethodPointer romMethod,
 UDATA pc,
 int[] resultsArray)
                                     throws CorruptDataException

Builds a map of stack use for supplied ROMmethod. Used to identify which slots on the stack hold objects.

Parameters:

romMethod - ROM method under test

pc -

resultsArray - Stack map bit array. One bit per slot.

Returns:

Less than 0 if there was an error. >=0 on success.

Throws:

CorruptDataException