use of com.ibm.j9ddr.vm29.pointer.U64Pointer in project openj9 by eclipse.
the class VMConstantPoolCommand method run.
/**
* Run method for !vmconstantpool extension.
*
* @param command !vmconstantpool
* @param args args passed by !vmconstantpool extension.
* @param context Context
* @param out PrintStream
* @throws DDRInteractiveCommandException
*/
public void run(String command, String[] args, Context context, PrintStream out) throws DDRInteractiveCommandException {
try {
J9JavaVMPointer javaVM;
javaVM = J9RASHelper.getVM(DataType.getJ9RASPointer());
if (args.length == 1) {
long vmaddress = CommandUtils.parsePointer(args[0], J9BuildFlags.env_data64);
if (vmaddress != javaVM.getAddress()) {
out.println(args[0] + " is not a valid j9javavm address. Run !findvm to find out the j9javavm address of the current context");
return;
}
} else if (args.length > 1) {
printUsage(out);
}
J9ConstantPoolPointer jclConstantPool = J9ConstantPoolPointer.cast(javaVM.jclConstantPoolEA());
J9ROMClassPointer romClass = jclConstantPool.ramClass().romClass();
int index;
U32Pointer cpShapeDescription;
int constPoolCount;
cpShapeDescription = romClass.cpShapeDescription();
long cpDescription = cpShapeDescription.at(0).longValue();
constPoolCount = romClass.romConstantPoolCount().intValue();
PointerPointer cpEntry = PointerPointer.cast(J9ROMClassHelper.constantPool(romClass));
long cpDescriptionIndex = 0;
for (index = 0; index < constPoolCount; index++) {
if (0 == cpDescriptionIndex) {
// Load a new description word
cpDescription = cpShapeDescription.at(0).longValue();
cpShapeDescription = cpShapeDescription.add(1);
cpDescriptionIndex = J9_CP_DESCRIPTIONS_PER_U32;
}
long shapeDesc = cpDescription & J9_CP_DESCRIPTION_MASK;
AbstractPointer ref = PointerPointer.NULL;
if (shapeDesc == J9CPTYPE_CLASS) {
ref = J9ROMClassRefPointer.cast(cpEntry);
} else if (shapeDesc == J9CPTYPE_STRING) {
ref = J9ROMStringRefPointer.cast(cpEntry);
} else if ((shapeDesc == J9CPTYPE_INT) || (shapeDesc == J9CPTYPE_FLOAT)) {
ref = J9ROMConstantPoolItemPointer.cast(cpEntry);
} else if (shapeDesc == J9CPTYPE_LONG) {
U64Pointer longPointer = U64Pointer.cast(cpEntry);
out.println("Long at " + longPointer.getHexAddress() + " {\n\t0x0: U64:" + longPointer.getHexValue() + "\n}");
} else if (shapeDesc == J9CPTYPE_DOUBLE) {
U64Pointer longPointer = U64Pointer.cast(cpEntry);
out.println("Double at " + longPointer.getHexAddress() + " {\n\t0x0: U64:" + longPointer.at(0).longValue() + "\n}");
} else if ((shapeDesc == J9CPTYPE_INSTANCE_METHOD) || (shapeDesc == J9CPTYPE_STATIC_METHOD) || (shapeDesc == J9CPTYPE_INTERFACE_METHOD) || (shapeDesc == J9CPTYPE_HANDLE_METHOD) || (shapeDesc == J9CPTYPE_FIELD)) {
long classRefCPIndex;
if (shapeDesc == J9CPTYPE_FIELD) {
ref = J9ROMFieldRefPointer.cast(cpEntry);
/* gets the classRefCPIndex to obtain a pointer to the j9romclassref */
classRefCPIndex = J9ROMFieldRefPointer.cast(ref).classRefCPIndex().longValue();
} else {
ref = J9ROMFieldRefPointer.cast(cpEntry);
classRefCPIndex = J9ROMMethodRefPointer.cast(ref).classRefCPIndex().longValue();
}
PointerPointer classRefCPEntry = PointerPointer.cast(J9ROMClassHelper.constantPool(romClass)).addOffset(J9ROMConstantPoolItem.SIZEOF * classRefCPIndex);
/* gets the DDR output of the item */
String outString = ref.formatFullInteractive();
String[] parts = outString.split(nl);
/* add a debug extension(!j9romclassref) on the second line of the output */
parts[1] += "(!j9romclassref " + classRefCPEntry.getHexAddress() + ")";
out.print(join(nl, parts));
} else if ((shapeDesc == J9CPTYPE_UNUSED) || (shapeDesc == J9CPTYPE_UNUSED8)) {
U64Pointer longPointer = U64Pointer.cast(cpEntry);
out.println("Unused at " + longPointer.getHexAddress() + " {\n\t0x0: U64:" + longPointer.at(0).longValue() + "\n}");
} else if (ref.notNull()) {
out.println(ref.formatFullInteractive());
}
cpEntry = cpEntry.addOffset(J9ROMConstantPoolItem.SIZEOF);
cpDescription >>= J9_CP_BITS_PER_DESCRIPTION;
cpDescriptionIndex -= 1;
}
} catch (CorruptDataException e) {
throw new DDRInteractiveCommandException(e);
}
}
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