Module openj9.dtfj

Package com.ibm.j9ddr.vm29.j9

Class VMConstantPool

java.lang.Object

com.ibm.j9ddr.vm29.j9.VMConstantPool

public final class VMConstantPool
extends Object

VMConstant pool value retrieval. The constant pool is referenced by constants from com.ibm.j9ddr.vm29.structure.J9ConstantPool. To find out what type the value is, refer to oti/vmconstantpool.xml, or look into the generated header ./oti/j9vmconstantpool.h.

Constructor Summary

Constructors

Constructor	Description
VMConstantPool()

Method Summary

Modifier and Type	Method	Description
static com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer	getClass(long index)	Get a class from the constant pool.
static J9ObjectFieldOffset	getFieldOffset(long index)	Get a field offset from the constant pool.

Methods declared in class java.lang.Object

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

Constructor Details

VMConstantPool

public VMConstantPool()

Method Details

getClass

public static com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer getClass(long index)
                                                                    throws CorruptDataException

Get a class from the constant pool.

Parameters:

index - A J9VmconstantpoolConstants index into the constant pool. Must be for a class reference.

Returns:

Either the loaded class, or if its not in the constant pool, J9ClassPointer.NULL.

Throws:

CorruptDataException - If the CPShape of the index is not a class.

getFieldOffset

public static J9ObjectFieldOffset getFieldOffset(long index)
                                          throws CorruptDataException

Get a field offset from the constant pool.

Parameters:

index - A J9VmconstantpoolConstants index into the constant pool. Must be for a static or instance field reference.

Returns:

Either the offset to the object, or null if the field's class is not resolved in the constant pool.

Throws:

CorruptDataException - If the field cannot be found in the related class or the CP index is not a field reference.