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jdimodelsrc.org.eclipse.jdi.internal.ThreadReferenceImpl Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2000, 2022 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Microsoft Corporation - supports virtual threads
*******************************************************************************/
package org.eclipse.jdi.internal;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.jdi.OpaqueFrameException;
import org.eclipse.jdi.internal.jdwp.JdwpCommandPacket;
import org.eclipse.jdi.internal.jdwp.JdwpID;
import org.eclipse.jdi.internal.jdwp.JdwpReplyPacket;
import org.eclipse.jdi.internal.jdwp.JdwpThreadID;
import org.eclipse.osgi.util.NLS;
import com.sun.jdi.ClassNotLoadedException;
import com.sun.jdi.IncompatibleThreadStateException;
import com.sun.jdi.InternalException;
import com.sun.jdi.InvalidStackFrameException;
import com.sun.jdi.InvalidTypeException;
import com.sun.jdi.NativeMethodException;
import com.sun.jdi.ObjectCollectedException;
import com.sun.jdi.ObjectReference;
import com.sun.jdi.StackFrame;
import com.sun.jdi.ThreadGroupReference;
import com.sun.jdi.ThreadReference;
import com.sun.jdi.VMCannotBeModifiedException;
import com.sun.jdi.VMDisconnectedException;
import com.sun.jdi.Value;
/**
* This class implements the corresponding interfaces declared by the JDI
* specification. See the com.sun.jdi package for more information.
*/
public class ThreadReferenceImpl extends ObjectReferenceImpl implements ThreadReference, org.eclipse.jdi.hcr.ThreadReference {
/** ThreadStatus Constants. */
public static final int JDWP_THREAD_STATUS_ZOMBIE = 0;
public static final int JDWP_THREAD_STATUS_RUNNING = 1;
public static final int JDWP_THREAD_STATUS_SLEEPING = 2;
public static final int JDWP_THREAD_STATUS_MONITOR = 3;
public static final int JDWP_THREAD_STATUS_WAIT = 4;
/** SuspendStatus Constants. */
public static final int SUSPEND_STATUS_SUSPENDED = 0x01;
/** Mapping of command codes to strings. */
private static Map fgThreadStatusMap = null;
/** Map with Strings for flag bits. */
private static String[] fgSuspendStatusStrings = null;
/** JDWP Tag. */
protected static final byte tag = JdwpID.THREAD_TAG;
/** Is thread currently at a breakpoint? */
private boolean fIsAtBreakpoint = false;
/**
* The cached thread group. A thread's thread group cannot be changed.
*/
private ThreadGroupReferenceImpl fThreadGroup = null;
// Whether a thread is a virtual thread or not is cached
private volatile boolean isVirtual;
private volatile boolean isVirtualCached;
/**
* Creates new ThreadReferenceImpl.
*/
public ThreadReferenceImpl(VirtualMachineImpl vmImpl, JdwpThreadID threadID) {
super("ThreadReference", vmImpl, threadID); //$NON-NLS-1$
}
/**
* Sets at breakpoint flag.
*/
public void setIsAtBreakpoint() {
fIsAtBreakpoint = true;
}
/**
* Reset flags that can be set when event occurs.
*/
public void resetEventFlags() {
fIsAtBreakpoint = false;
}
/**
* @return Value tag.
*/
@Override
public byte getTag() {
return tag;
}
/**
* @return Returns an ObjectReference for the monitor, if any, for which
* this thread is currently waiting.
*/
@Override
public ObjectReference currentContendedMonitor()
throws IncompatibleThreadStateException {
if (!virtualMachine().canGetCurrentContendedMonitor()) {
throw new UnsupportedOperationException();
}
// Note that this information should not be cached.
initJdwpRequest();
try {
JdwpReplyPacket replyPacket = requestVM(
JdwpCommandPacket.TR_CURRENT_CONTENDED_MONITOR, this);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.INVALID_THREAD:
throw new ObjectCollectedException();
case JdwpReplyPacket.THREAD_NOT_SUSPENDED:
throw new IncompatibleThreadStateException(
JDIMessages.ThreadReferenceImpl_Thread_was_not_suspended_1);
}
defaultReplyErrorHandler(replyPacket.errorCode());
DataInputStream replyData = replyPacket.dataInStream();
ObjectReference result = ObjectReferenceImpl.readObjectRefWithTag(
this, replyData);
return result;
} catch (IOException e) {
defaultIOExceptionHandler(e);
return null;
} finally {
handledJdwpRequest();
}
}
/**
* @see com.sun.jdi.ThreadReference#forceEarlyReturn(com.sun.jdi.Value)
* @since 3.3
*/
@Override
public void forceEarlyReturn(Value value) throws InvalidTypeException,
ClassNotLoadedException, IncompatibleThreadStateException {
if (!virtualMachineImpl().canBeModified()) {
throw new VMCannotBeModifiedException(
JDIMessages.ThreadReferenceImpl_vm_read_only);
}
initJdwpRequest();
ByteArrayOutputStream byteOutStream = new ByteArrayOutputStream();
DataOutputStream dataOutStream = new DataOutputStream(byteOutStream);
try {
write(this, dataOutStream);
if (value != null) {
((ValueImpl) value).writeWithTag((ValueImpl) value,
dataOutStream);
} else {
ValueImpl.writeNullWithTag(this, dataOutStream);
}
JdwpReplyPacket reply = requestVM(
JdwpCommandPacket.TR_FORCE_EARLY_RETURN, byteOutStream);
switch (reply.errorCode()) {
case JdwpReplyPacket.INVALID_THREAD:
throw new ObjectCollectedException(
JDIMessages.ThreadReferenceImpl_thread_object_invalid);
case JdwpReplyPacket.INVALID_OBJECT:
throw new ClassNotLoadedException(
JDIMessages.ThreadReferenceImpl_thread_or_value_unknown);
case JdwpReplyPacket.THREAD_NOT_SUSPENDED:
case JdwpReplyPacket.THREAD_NOT_ALIVE:
throw new IncompatibleThreadStateException(
JDIMessages.ThreadReferenceImpl_thread_not_suspended);
case JdwpReplyPacket.NOT_IMPLEMENTED:
throw new UnsupportedOperationException(
JDIMessages.ThreadReferenceImpl_no_force_early_return_on_threads);
case JdwpReplyPacket.OPAQUE_FRAME:
if (isVirtual()) {
throw new OpaqueFrameException();
}
throw new NativeMethodException(JDIMessages.ThreadReferenceImpl_thread_cannot_force_native_method);
case JdwpReplyPacket.NO_MORE_FRAMES:
throw new InvalidStackFrameException(
JDIMessages.ThreadReferenceImpl_thread_no_stackframes);
case JdwpReplyPacket.TYPE_MISMATCH:
throw new InvalidTypeException(
JDIMessages.ThreadReferenceImpl_incapatible_return_type);
case JdwpReplyPacket.VM_DEAD:
throw new VMDisconnectedException(JDIMessages.vm_dead);
}
defaultReplyErrorHandler(reply.errorCode());
} catch (IOException e) {
defaultIOExceptionHandler(e);
} finally {
handledJdwpRequest();
}
}
/**
* @return Returns the StackFrame at the given index in the thread's
* current call stack.
*/
@Override
public StackFrame frame(int index) throws IncompatibleThreadStateException {
return frames(index, 1).get(0);
}
/**
* @see com.sun.jdi.ThreadReference#frameCount()
*/
@Override
public int frameCount() throws IncompatibleThreadStateException {
// Note that this information should not be cached.
initJdwpRequest();
try {
JdwpReplyPacket replyPacket = requestVM(
JdwpCommandPacket.TR_FRAME_COUNT, this);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.INVALID_THREAD:
throw new ObjectCollectedException();
case JdwpReplyPacket.THREAD_NOT_SUSPENDED:
throw new IncompatibleThreadStateException(
JDIMessages.ThreadReferenceImpl_Thread_was_not_suspended_1);
}
defaultReplyErrorHandler(replyPacket.errorCode());
DataInputStream replyData = replyPacket.dataInStream();
int result = readInt("frame count", replyData); //$NON-NLS-1$
return result;
} catch (IOException e) {
defaultIOExceptionHandler(e);
return 0;
} finally {
handledJdwpRequest();
}
}
/* (non-Javadoc)
* @see com.sun.jdi.ThreadReference#frames()
*/
@Override
public List frames() throws IncompatibleThreadStateException {
return frames(0, -1);
}
/* (non-Javadoc)
* @see com.sun.jdi.ThreadReference#frames(int, int)
*/
@Override
public List frames(int start, int length) throws IndexOutOfBoundsException,
IncompatibleThreadStateException {
// Note that this information should not be cached.
initJdwpRequest();
try {
ByteArrayOutputStream outBytes = new ByteArrayOutputStream();
DataOutputStream outData = new DataOutputStream(outBytes);
write(this, outData);
writeInt(start, "start", outData); //$NON-NLS-1$
writeInt(length, "length", outData); //$NON-NLS-1$
JdwpReplyPacket replyPacket = requestVM(
JdwpCommandPacket.TR_FRAMES, outBytes);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.INVALID_THREAD:
throw new ObjectCollectedException();
case JdwpReplyPacket.THREAD_NOT_SUSPENDED:
throw new IncompatibleThreadStateException(
JDIMessages.ThreadReferenceImpl_Thread_was_not_suspended_1);
case JdwpReplyPacket.INVALID_INDEX:
throw new IndexOutOfBoundsException(
JDIMessages.ThreadReferenceImpl_Invalid_index_of_stack_frames_given_4);
}
defaultReplyErrorHandler(replyPacket.errorCode());
DataInputStream replyData = replyPacket.dataInStream();
int nrOfElements = readInt("elements", replyData); //$NON-NLS-1$
List frames = new ArrayList<>(nrOfElements);
for (int i = 0; i < nrOfElements; i++) {
StackFrameImpl frame = StackFrameImpl.readWithLocation(this,
this, replyData);
if (frame == null) {
continue;
}
frames.add(frame);
}
return frames;
} catch (IOException e) {
defaultIOExceptionHandler(e);
return null;
} finally {
handledJdwpRequest();
}
}
/* (non-Javadoc)
* @see com.sun.jdi.ThreadReference#interrupt()
*/
@Override
public void interrupt() {
// Note that this information should not be cached.
initJdwpRequest();
try {
requestVM(JdwpCommandPacket.TR_INTERRUPT, this);
} finally {
handledJdwpRequest();
}
}
/* (non-Javadoc)
* @see com.sun.jdi.ThreadReference#isAtBreakpoint()
*/
@Override
public boolean isAtBreakpoint() {
return isSuspended() && fIsAtBreakpoint;
}
/* (non-Javadoc)
* @see com.sun.jdi.ThreadReference#isSuspended()
*/
@Override
public boolean isSuspended() {
// Note that this information should not be cached.
initJdwpRequest();
try {
JdwpReplyPacket replyPacket = requestVM(
JdwpCommandPacket.TR_STATUS, this);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.INVALID_THREAD:
throw new ObjectCollectedException();
}
defaultReplyErrorHandler(replyPacket.errorCode());
DataInputStream replyData = replyPacket.dataInStream();
// remove the thread status reply
readInt("thread status", threadStatusMap(), replyData); //$NON-NLS-1$
int suspendStatus = readInt(
"suspend status", suspendStatusStrings(), replyData); //$NON-NLS-1$
boolean result = suspendStatus == SUSPEND_STATUS_SUSPENDED;
return result;
} catch (IOException e) {
defaultIOExceptionHandler(e);
return false;
} finally {
handledJdwpRequest();
}
}
/**
* isVirtual is a preview API of the Java platform. Programs can only use isVirtual when preview features are enabled. Preview features may be
* removed in a future release, or upgraded to permanent features of the Java platform.
*
* @return true if the thread is a virtual thread
* @since 3.20
*/
public boolean isVirtual() {
if (isVirtualCached) {
return isVirtual;
}
boolean result = false;
boolean supportsVirtualThreads = virtualMachineImpl().mayCreateVirtualThreads();
if (supportsVirtualThreads) {
initJdwpRequest();
try {
JdwpReplyPacket replyPacket = requestVM(JdwpCommandPacket.TR_IS_VIRTUAL, this);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.INVALID_THREAD:
throw new ObjectCollectedException();
}
defaultReplyErrorHandler(replyPacket.errorCode());
DataInputStream replyData = replyPacket.dataInStream();
result = readBoolean("isVirtual", replyData); //$NON-NLS-1$
} catch (IOException e) {
defaultIOExceptionHandler(e);
return false;
} finally {
handledJdwpRequest();
}
}
isVirtual = result;
isVirtualCached = true;
return result;
}
/* (non-Javadoc)
* @see com.sun.jdi.ThreadReference#name()
*/
@Override
public String name() {
initJdwpRequest();
try {
JdwpReplyPacket replyPacket = requestVM(JdwpCommandPacket.TR_NAME,
this);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.INVALID_THREAD:
throw new ObjectCollectedException();
}
defaultReplyErrorHandler(replyPacket.errorCode());
DataInputStream replyData = replyPacket.dataInStream();
return readString("name", replyData); //$NON-NLS-1$
} catch (IOException e) {
defaultIOExceptionHandler(e);
return null;
} finally {
handledJdwpRequest();
}
}
/* (non-Javadoc)
* @see com.sun.jdi.ThreadReference#ownedMonitors()
*/
@Override
public List ownedMonitors() throws IncompatibleThreadStateException {
if (!virtualMachine().canGetOwnedMonitorInfo()) {
throw new UnsupportedOperationException();
}
// Note that this information should not be cached.
initJdwpRequest();
try {
JdwpReplyPacket replyPacket = requestVM(
JdwpCommandPacket.TR_OWNED_MONITORS, this);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.INVALID_THREAD:
throw new ObjectCollectedException();
case JdwpReplyPacket.THREAD_NOT_SUSPENDED:
throw new IncompatibleThreadStateException(
JDIMessages.ThreadReferenceImpl_Thread_was_not_suspended_5);
}
defaultReplyErrorHandler(replyPacket.errorCode());
DataInputStream replyData = replyPacket.dataInStream();
int nrOfMonitors = readInt("nr of monitors", replyData); //$NON-NLS-1$
List result = new ArrayList<>(nrOfMonitors);
for (int i = 0; i < nrOfMonitors; i++) {
result.add(ObjectReferenceImpl.readObjectRefWithTag(this,
replyData));
}
return result;
} catch (IOException e) {
defaultIOExceptionHandler(e);
return null;
} finally {
handledJdwpRequest();
}
}
/* (non-Javadoc)
* @see com.sun.jdi.ThreadReference#ownedMonitorsAndFrames()
*/
@Override
public List ownedMonitorsAndFrames()
throws IncompatibleThreadStateException {
initJdwpRequest();
try {
JdwpReplyPacket replyPacket = requestVM(
JdwpCommandPacket.TR_OWNED_MONITOR_STACK_DEPTH, this);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.INVALID_THREAD:
case JdwpReplyPacket.INVALID_OBJECT:
throw new ObjectCollectedException(
JDIMessages.ThreadReferenceImpl_thread_object_invalid);
case JdwpReplyPacket.THREAD_NOT_SUSPENDED:
throw new IncompatibleThreadStateException(
JDIMessages.ThreadReferenceImpl_Thread_was_not_suspended_5);
case JdwpReplyPacket.NOT_IMPLEMENTED:
throw new UnsupportedOperationException(
JDIMessages.ThreadReferenceImpl_no_force_early_return_on_threads);
case JdwpReplyPacket.VM_DEAD:
throw new VMDisconnectedException(JDIMessages.vm_dead);
}
defaultReplyErrorHandler(replyPacket.errorCode());
DataInputStream replyData = replyPacket.dataInStream();
int owned = readInt("owned monitors", replyData); //$NON-NLS-1$
List result = new ArrayList<>(owned);
ObjectReference monitor = null;
int depth = -1;
for (int i = 0; i < owned; i++) {
monitor = ObjectReferenceImpl.readObjectRefWithTag(this,
replyData);
depth = readInt("stack depth", replyData); //$NON-NLS-1$
result.add(new MonitorInfoImpl(this, depth, monitor, virtualMachineImpl()));
}
return result;
} catch (IOException e) {
defaultIOExceptionHandler(e);
return null;
} finally {
handledJdwpRequest();
}
}
/**
* Resumes this thread.
*
* @see com.sun.jdi.ThreadReference#resume()
*/
@Override
public void resume() {
initJdwpRequest();
try {
JdwpReplyPacket replyPacket = requestVM(
JdwpCommandPacket.TR_RESUME, this);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.INVALID_THREAD:
throw new ObjectCollectedException();
}
defaultReplyErrorHandler(replyPacket.errorCode());
resetEventFlags();
} finally {
handledJdwpRequest();
}
}
/**
* @return Returns the thread's status.
*/
@Override
public int status() {
// Note that this information should not be cached.
initJdwpRequest();
try {
JdwpReplyPacket replyPacket = requestVM(
JdwpCommandPacket.TR_STATUS, this);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.ABSENT_INFORMATION:
return THREAD_STATUS_UNKNOWN;
case JdwpReplyPacket.INVALID_THREAD:
return THREAD_STATUS_NOT_STARTED;
}
defaultReplyErrorHandler(replyPacket.errorCode());
DataInputStream replyData = replyPacket.dataInStream();
int threadStatus = readInt(
"thread status", threadStatusMap(), replyData); //$NON-NLS-1$
readInt("suspend status", suspendStatusStrings(), replyData); //$NON-NLS-1$
switch (threadStatus) {
case JDWP_THREAD_STATUS_ZOMBIE:
return THREAD_STATUS_ZOMBIE;
case JDWP_THREAD_STATUS_RUNNING:
return THREAD_STATUS_RUNNING;
case JDWP_THREAD_STATUS_SLEEPING:
return THREAD_STATUS_SLEEPING;
case JDWP_THREAD_STATUS_MONITOR:
return THREAD_STATUS_MONITOR;
case JDWP_THREAD_STATUS_WAIT:
return THREAD_STATUS_WAIT;
case -1: // see bug 30816
return THREAD_STATUS_UNKNOWN;
}
throw new InternalException(
JDIMessages.ThreadReferenceImpl_Unknown_thread_status_received___6
+ threadStatus);
} catch (IOException e) {
defaultIOExceptionHandler(e);
return 0;
} finally {
handledJdwpRequest();
}
}
/**
* Stops this thread with an asynchronous exception.
*
* @see com.sun.jdi.ThreadReference#stop(com.sun.jdi.ObjectReference)
*/
@Override
public void stop(ObjectReference throwable) throws InvalidTypeException {
checkVM(throwable);
ObjectReferenceImpl throwableImpl = (ObjectReferenceImpl) throwable;
initJdwpRequest();
try {
ByteArrayOutputStream outBytes = new ByteArrayOutputStream();
DataOutputStream outData = new DataOutputStream(outBytes);
write(this, outData);
throwableImpl.write(this, outData);
JdwpReplyPacket replyPacket = requestVM(JdwpCommandPacket.TR_STOP,
outBytes);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.INVALID_THREAD:
throw new ObjectCollectedException();
case JdwpReplyPacket.INVALID_CLASS:
throw new InvalidTypeException(
JDIMessages.ThreadReferenceImpl_Stop_argument_not_an_instance_of_java_lang_Throwable_in_the_target_VM_7);
}
defaultReplyErrorHandler(replyPacket.errorCode());
} catch (IOException e) {
defaultIOExceptionHandler(e);
} finally {
handledJdwpRequest();
}
}
/**
* Suspends this thread.
*
* @see com.sun.jdi.ThreadReference#suspend()
*/
@Override
public void suspend() {
initJdwpRequest();
try {
JdwpReplyPacket replyPacket = requestVM(
JdwpCommandPacket.TR_SUSPEND, this);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.INVALID_THREAD:
throw new ObjectCollectedException();
}
defaultReplyErrorHandler(replyPacket.errorCode());
} finally {
handledJdwpRequest();
}
}
/**
* @return Returns the number of pending suspends for this thread.
*/
@Override
public int suspendCount() {
// Note that this information should not be cached.
initJdwpRequest();
try {
JdwpReplyPacket replyPacket = requestVM(
JdwpCommandPacket.TR_SUSPEND_COUNT, this);
defaultReplyErrorHandler(replyPacket.errorCode());
DataInputStream replyData = replyPacket.dataInStream();
int result = readInt("suspend count", replyData); //$NON-NLS-1$
return result;
} catch (IOException e) {
defaultIOExceptionHandler(e);
return 0;
} finally {
handledJdwpRequest();
}
}
/**
* @return Returns this thread's thread group.
*/
@Override
public ThreadGroupReference threadGroup() {
if (fThreadGroup != null) {
return fThreadGroup;
}
initJdwpRequest();
try {
JdwpReplyPacket replyPacket = requestVM(
JdwpCommandPacket.TR_THREAD_GROUP, this);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.INVALID_THREAD:
throw new ObjectCollectedException();
}
defaultReplyErrorHandler(replyPacket.errorCode());
DataInputStream replyData = replyPacket.dataInStream();
fThreadGroup = ThreadGroupReferenceImpl.read(this, replyData);
return fThreadGroup;
} catch (IOException e) {
defaultIOExceptionHandler(e);
return null;
} finally {
handledJdwpRequest();
}
}
/**
* Simulate the execution of a return instruction instead of executing the
* next byte code in a method.
*
* @return Returns whether any finally or synchronized blocks are enclosing
* the current instruction.
*/
@Override
public boolean doReturn(Value returnValue,
boolean triggerFinallyAndSynchronized)
throws org.eclipse.jdi.hcr.OperationRefusedException {
virtualMachineImpl().checkHCRSupported();
ValueImpl valueImpl;
if (returnValue != null) { // null is used if no value is returned.
checkVM(returnValue);
valueImpl = (ValueImpl) returnValue;
} else {
try {
TypeImpl returnType = (TypeImpl) frame(0).location().method()
.returnType();
valueImpl = (ValueImpl) returnType.createNullValue();
} catch (IncompatibleThreadStateException e) {
throw new org.eclipse.jdi.hcr.OperationRefusedException(
e.toString());
} catch (ClassNotLoadedException e) {
throw new org.eclipse.jdi.hcr.OperationRefusedException(
e.toString());
}
}
// Note that this information should not be cached.
initJdwpRequest();
try {
ByteArrayOutputStream outBytes = new ByteArrayOutputStream();
DataOutputStream outData = new DataOutputStream(outBytes);
write(this, outData);
valueImpl.writeWithTag(this, outData);
writeBoolean(triggerFinallyAndSynchronized,
"trigger finaly+sync", outData); //$NON-NLS-1$
JdwpReplyPacket replyPacket = requestVM(
JdwpCommandPacket.HCR_DO_RETURN, outBytes);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.INVALID_THREAD:
throw new ObjectCollectedException();
}
defaultReplyErrorHandler(replyPacket.errorCode());
DataInputStream replyData = replyPacket.dataInStream();
boolean result = readBoolean("is enclosed", replyData); //$NON-NLS-1$
return result;
} catch (IOException e) {
defaultIOExceptionHandler(e);
return false;
} finally {
handledJdwpRequest();
}
}
/**
* @return Returns description of Mirror object.
*/
@Override
public String toString() {
try {
return NLS.bind(JDIMessages.ThreadReferenceImpl_8,
new String[] { type().toString(), name(),
getObjectID().toString() });
} catch (ObjectCollectedException e) {
return JDIMessages.ThreadReferenceImpl__Garbage_Collected__ThreadReference__9
+ idString();
} catch (Exception e) {
return fDescription;
}
}
/**
* @return Reads JDWP representation and returns new instance.
*/
public static ThreadReferenceImpl read(MirrorImpl target, DataInputStream in)
throws IOException {
VirtualMachineImpl vmImpl = target.virtualMachineImpl();
JdwpThreadID ID = new JdwpThreadID(vmImpl);
ID.read(in);
if (target.fVerboseWriter != null)
{
target.fVerboseWriter.println("threadReference", ID.value()); //$NON-NLS-1$
}
if (ID.isNull()) {
return null;
}
ThreadReferenceImpl mirror = (ThreadReferenceImpl) vmImpl
.getCachedMirror(ID);
if (mirror == null) {
mirror = new ThreadReferenceImpl(vmImpl, ID);
vmImpl.addCachedMirror(mirror);
}
return mirror;
}
/**
* Retrieves constant mappings.
*/
public static void getConstantMaps() {
if (fgThreadStatusMap != null) {
return;
}
Field[] fields = ThreadReferenceImpl.class.getDeclaredFields();
fgThreadStatusMap = new HashMap<>();
fgSuspendStatusStrings = new String[32]; // Int
for (Field field : fields) {
if ((field.getModifiers() & Modifier.PUBLIC) == 0
|| (field.getModifiers() & Modifier.STATIC) == 0
|| (field.getModifiers() & Modifier.FINAL) == 0) {
continue;
}
try {
String name = field.getName();
int value = field.getInt(null);
Integer intValue = Integer.valueOf(value);
if (name.startsWith("JDWP_THREAD_STATUS_")) { //$NON-NLS-1$
name = name.substring(19);
fgThreadStatusMap.put(intValue, name);
} else if (name.startsWith("SUSPEND_STATUS_")) { //$NON-NLS-1$
name = name.substring(15);
for (int j = 0; j < fgSuspendStatusStrings.length; j++) {
if ((1 << j & value) != 0) {
fgSuspendStatusStrings[j] = name;
break;
}
}
}
} catch (IllegalAccessException e) {
// Will not occur for own class.
} catch (IllegalArgumentException e) {
// Should not occur.
// We should take care that all public static final constants
// in this class are numbers that are convertible to int.
}
}
}
/**
* @return Returns a map with string representations of tags.
*/
public static Map threadStatusMap() {
getConstantMaps();
return fgThreadStatusMap;
}
/**
* @return Returns a map with string representations of tags.
*/
public static String[] suspendStatusStrings() {
getConstantMaps();
return fgSuspendStatusStrings;
}
/**
* @see ThreadReference#popFrames(StackFrame)
*/
@Override
public void popFrames(StackFrame frameToPop)
throws IncompatibleThreadStateException {
if (!isSuspended()) {
throw new IncompatibleThreadStateException();
}
if (!virtualMachineImpl().canPopFrames()) {
throw new UnsupportedOperationException();
}
StackFrameImpl frame = (StackFrameImpl) frameToPop;
initJdwpRequest();
try {
ByteArrayOutputStream outBytes = new ByteArrayOutputStream();
DataOutputStream outData = new DataOutputStream(outBytes);
frame.writeWithThread(frame, outData);
JdwpReplyPacket replyPacket = requestVM(
JdwpCommandPacket.SF_POP_FRAME, outBytes);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.OPAQUE_FRAME:
if (isVirtual()) {
throw new OpaqueFrameException();
}
throw new NativeMethodException();
case JdwpReplyPacket.INVALID_THREAD:
throw new InvalidStackFrameException();
case JdwpReplyPacket.INVALID_FRAMEID:
throw new InvalidStackFrameException(
JDIMessages.ThreadReferenceImpl_Unable_to_pop_the_requested_stack_frame_from_the_call_stack__Reasons_include__The_frame_id_was_invalid__The_thread_was_resumed__10);
case JdwpReplyPacket.THREAD_NOT_SUSPENDED:
throw new IncompatibleThreadStateException(
JDIMessages.ThreadReferenceImpl_Unable_to_pop_the_requested_stack_frame__The_requested_stack_frame_is_not_suspended_11);
case JdwpReplyPacket.NO_MORE_FRAMES:
throw new InvalidStackFrameException(
JDIMessages.ThreadReferenceImpl_Unable_to_pop_the_requested_stack_frame_from_the_call_stack__Reasons_include__The_requested_frame_was_the_last_frame_on_the_call_stack__The_requested_frame_was_the_last_frame_above_a_native_frame__12);
default:
defaultReplyErrorHandler(replyPacket.errorCode());
}
} catch (IOException ioe) {
defaultIOExceptionHandler(ioe);
} finally {
handledJdwpRequest();
}
}
}
