public OopHandle getOopHandle(int x) {
Address oopAddr = getOopHandleAddress(x);
if (oopAddr != null) {
return oopAddr.getOopHandleAt(0);
}
return null;
}
public ThreadProxy getThreadProxy(Address addr) {
// Addr is the address of the JavaThread.
// Fetch the OSThread (for now and for simplicity, not making a
// separate "OSThread" class in this package)
Address osThreadAddr = osThreadField.getValue(addr);
// Get the address of the _thread_id from the OSThread
Address threadIdAddr = osThreadAddr.addOffsetTo(osThreadThreadIDField.getOffset());
JVMDebugger debugger = VM.getVM().getDebugger();
return debugger.getThreadForIdentifierAddress(threadIdAddr);
}
/**
* Debugging routine: returns the index (0..top() - 1) of the handle in this block, or -1 if the
* handle was not contained in this block. Does not search successor blocks.
*/
public int indexOfHandle(Address jniHandle) {
for (int i = 0; i < top(); i++) {
Address addr = getOopHandleAddress(i);
if (addr != null) {
if (addr.equals(jniHandle)) {
return i;
}
}
}
return -1;
}
/** Only returns addresses of valid OopHandles */
private Address getOopHandleAddress(int x) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(x < top(), "out of bounds");
}
Address oopAddr = addr.addOffsetTo(handlesField.getOffset() + x * VM.getVM().getOopSize());
OopHandle handle = oopAddr.getOopHandleAt(0);
if (VM.getVM().getUniverse().isInReserved(handle)
&& !VM.getVM().getJNIHandles().isDeletedHandle(handle)) {
/* the oop handle is valid only if it is not freed (i.e. reserved in heap) and is not a deleted oop */
return oopAddr;
} else {
return null;
}
}
// refer to Threads::owning_thread_from_monitor_owner
public JavaThread owningThreadFromMonitor(Address o) {
if (o == null) return null;
for (JavaThread thread = first(); thread != null; thread = thread.next()) {
if (o.equals(thread.threadObjectAddress())) {
return thread;
}
}
for (JavaThread thread = first(); thread != null; thread = thread.next()) {
if (thread.isLockOwned(o)) return thread;
}
return null;
}
public Address getLastJavaFP(Address addr) {
return lastJavaFPField.getValue(
addr.addOffsetTo(sun.jvm.hotspot.runtime.JavaThread.getAnchorField().getOffset()));
}
public int regEncode() {
if (matcherRegEncodeAddr != null) {
return (int) matcherRegEncodeAddr.getCIntegerAt(value, 1, true);
}
return value;
}