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   1 /**********************************************************************
   2  Copyright (c) 2000, 2002 IBM Corp. and others.
   3  All rights reserved. This program and the accompanying materials
   4  are made available under the terms of the Common Public License v1.0
   5  which accompanies this distribution, and is available at
   6  http://www.eclipse.org/legal/cpl-v10.html
   7
   8  Contributors:
   9  IBM Corporation - Initial implementation
  10  Vicente Fernando - www.alfersoft.com.ar
  11  **********************************************************************/
  12 package net.sourceforge.phpdt.internal.debug.core.model;
  13
  14 import net.sourceforge.phpdt.internal.debug.core.PHPDBGProxy;
  15 import net.sourceforge.phpdt.internal.debug.core.PHPDebugCorePlugin;
  16 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  17
  18 import org.eclipse.core.resources.IMarkerDelta;
  19 import org.eclipse.debug.core.DebugEvent;
  20 import org.eclipse.debug.core.DebugException;
  21 import org.eclipse.debug.core.DebugPlugin;
  22 import org.eclipse.debug.core.IBreakpointManager;
  23 import org.eclipse.debug.core.IDebugEventSetListener;
  24 import org.eclipse.debug.core.ILaunch;
  25 import org.eclipse.debug.core.ILaunchListener;
  26 import org.eclipse.debug.core.model.IBreakpoint;
  27 import org.eclipse.debug.core.model.IDebugTarget;
  28 import org.eclipse.debug.core.model.IMemoryBlock;
  29 import org.eclipse.debug.core.model.IProcess;
  30 import org.eclipse.debug.core.model.IThread;
  31 import org.eclipse.jface.resource.ImageDescriptor;
  32 import org.eclipse.ui.model.IWorkbenchAdapter;
  33
  34 /**
  35  * Debug target for PHP debug model.
  36  */
  37 public class PHPDebugTarget implements IPHPDebugTarget, ILaunchListener,
  38                 IDebugEventSetListener {
  39
  40         private IProcess process;
  41
  42         private ILaunch launch;
  43
  44         private PHPThread[] threads = new PHPThread[0];
  45
  46         private PHPDBGProxy phpDBGProxy;
  47
  48         private class State {
  49                 private boolean isTerminated = false;
  50
  51                 private boolean isSuspended = false;
  52
  53                 boolean isTerminated() {
  54                         return isTerminated;
  55                 }
  56
  57                 boolean isSuspended() {
  58                         return isSuspended;
  59                 }
  60
  61                 void setTerminated(boolean terminated) {
  62                         this.isTerminated = terminated;
  63                 }
  64
  65                 void setSuspended(boolean suspended) {
  66                         if (isTerminated())
  67                                 throw new IllegalStateException();
  68                         this.isSuspended = suspended;
  69                 }
  70         }
  71
  72         private final State state = new State();
  73
  74         public PHPDebugTarget(ILaunch launch, IProcess process) {
  75                 if (null == launch && null == process)
  76                         throw new IllegalArgumentException();
  77                 this.launch = launch;
  78                 this.process = process;
  79                 // TODO XXX remove breakpoint listener at termination to avoid live leak
  80                 IBreakpointManager manager = DebugPlugin.getDefault()
  81                                 .getBreakpointManager();
  82                 manager.addBreakpointListener(this);
  83                 DebugPlugin.getDefault().addDebugEventListener(this);
  84                 initialize();
  85         }
  86
  87         protected synchronized void initialize() {
  88                 DebugEvent ev = new DebugEvent(this, DebugEvent.CREATE);
  89                 DebugPlugin.getDefault().fireDebugEventSet(new DebugEvent[] { ev });
  90         }
  91
  92         public void addThread(PHPThread phpThread) {
  93                 int i;
  94                 PHPThread[] updatedThreads = new PHPThread[threads.length + 1];
  95
  96                 for (i = 0; i < threads.length; i++) {
  97                         updatedThreads[i] = threads[i];
  98                 }
  99                 updatedThreads[i] = phpThread;
 100                 threads = updatedThreads;
 101
 102                 fireChangeEvent();
 103                 fireThreadCreateEvent(phpThread);
 104         }
 105
 106         private void fireChangeEvent() {
 107                 DebugEvent ev = new DebugEvent(this, DebugEvent.CHANGE);
 108                 DebugPlugin.getDefault().fireDebugEventSet(new DebugEvent[] { ev });
 109         }
 110
 111         private void fireThreadCreateEvent(PHPThread phpThread) {
 112                 DebugEvent ev = new DebugEvent(phpThread, DebugEvent.CREATE);
 113                 DebugPlugin.getDefault().fireDebugEventSet(new DebugEvent[] { ev });
 114         }
 115
 116         protected PHPThread getThreadById(int id) {
 117                 for (int i = 0; i < threads.length; i++) {
 118                         if (threads[i].getId() == id) {
 119                                 return threads[i];
 120                         }
 121                 }
 122                 return null;
 123         }
 124
 125         public IThread[] getThreads() {
 126                 return threads;
 127         }
 128
 129         public boolean hasThreads() throws DebugException {
 130                 return threads.length > 0;
 131         }
 132
 133         public String getName() throws DebugException {
 134                 return "PHP Debugger at localhost:" + getPHPDBGProxy().getPort();
 135         }
 136
 137         public boolean supportsBreakpoint(IBreakpoint arg0) {
 138                 if (arg0.getModelIdentifier().equals(PHPDebugCorePlugin.PLUGIN_ID)) {
 139                         return true;
 140                 }
 141                 return false;
 142         }
 143
 144         public String getModelIdentifier() {
 145                 return PHPDebugCorePlugin.PLUGIN_ID;
 146         }
 147
 148         public IDebugTarget getDebugTarget() {
 149                 return this;
 150         }
 151
 152         public ILaunch getLaunch() {
 153                 return launch;
 154         }
 155
 156         public synchronized boolean canTerminate() {
 157                 return !isTerminated();
 158         }
 159
 160         public synchronized boolean isTerminated() {
 161                 return state.isTerminated();
 162         }
 163
 164         public synchronized void terminate() {
 165                 // This method is synchronized to control a race condition between the
 166                 // UI thread that terminates the debugging session, and the slave
 167                 // thread that executes PHPLoop.run
 168                 if (isTerminated())
 169                         // Avoid terminating twice...
 170                         return;
 171                 state.setTerminated(true);
 172                 phpDBGProxy.stop();
 173                 this.threads = new PHPThread[0];
 174                 fireChangeEvent();
 175                 IBreakpointManager manager = DebugPlugin.getDefault()
 176                                 .getBreakpointManager();
 177                 manager.removeBreakpointListener(this);
 178                 DebugPlugin.getDefault().removeDebugEventListener(this);
 179         }
 180
 181         public synchronized boolean canResume() {
 182                 if (isTerminated())
 183                         return false;
 184                 return isSuspended();
 185         }
 186
 187         public synchronized boolean canSuspend() {
 188                 if (isTerminated())
 189                         return false;
 190                 return !isSuspended();
 191         }
 192
 193         public synchronized boolean isSuspended() {
 194                 return state.isSuspended();
 195         }
 196
 197         public synchronized void resume() throws DebugException {
 198                 if (!isSuspended())
 199                         return;
 200                 state.setSuspended(false);
 201                 this.getPHPDBGProxy().resume();
 202                 IThread[] threads = getThreads();
 203                 for (int i = 0; i < threads.length; ++i)
 204                         threads[i].resume();
 205         }
 206
 207         public synchronized void suspend() throws DebugException {
 208                 if (isSuspended())
 209                         return;
 210                 this.getPHPDBGProxy().pause();
 211                 state.setSuspended(true);
 212                 IThread[] threads = getThreads();
 213                 for (int i = 0; i < threads.length; ++i)
 214                         threads[i].suspend();
 215         }
 216
 217         public void breakpointAdded(IBreakpoint breakpoint) {
 218                 this.getPHPDBGProxy().addBreakpoint(breakpoint);
 219         }
 220
 221         public void breakpointRemoved(IBreakpoint breakpoint, IMarkerDelta arg1) {
 222                 this.getPHPDBGProxy().removeBreakpoint(breakpoint);
 223         }
 224
 225         public void breakpointChanged(IBreakpoint breakpoint, IMarkerDelta arg1) {
 226                 // is called e.g. after a line has been inserted before a breakpoint
 227                 // but then the debugger is out of sync with the file anyway, so
 228                 // debugging
 229                 // should be stopped here.
 230         }
 231
 232         public boolean canDisconnect() {
 233                 return false;
 234         }
 235
 236         public void disconnect() throws DebugException {
 237         }
 238
 239         public boolean isDisconnected() {
 240                 return false;
 241         }
 242
 243         public boolean supportsStorageRetrieval() {
 244                 return false;
 245         }
 246
 247         public IMemoryBlock getMemoryBlock(long arg0, long arg1)
 248                         throws DebugException {
 249                 return null;
 250         }
 251
 252         public Object getAdapter(Class arg0) {
 253                 if (IWorkbenchAdapter.class.equals(arg0)) {
 254                         return new IWorkbenchAdapter() {
 255                                 public Object[] getChildren(Object o) {
 256                                         Object[] children = null;
 257                                         IThread[] threads = getThreads();
 258                                         if (null != threads) {
 259                                                 children = new Object[threads.length];
 260                                                 for (int i = 0; i < threads.length; ++i)
 261                                                         children[i] = threads[i];
 262                                         }
 263                                         return children;
 264                                 }
 265
 266                                 public ImageDescriptor getImageDescriptor(Object object) {
 267                                         return null;
 268                                 }
 269
 270                                 public String getLabel(Object o) {
 271                                         String label = "(Unable to look up name... check error log)";
 272                                         try {
 273                                                 label = getName();
 274                                         } catch (DebugException x) {
 275                                                 PHPeclipsePlugin.log(label, x);
 276                                         }
 277                                         return label;
 278                                 }
 279
 280                                 public Object getParent(Object o) {
 281                                         return PHPDebugTarget.this.getLaunch();
 282                                 }
 283                         };
 284                 }
 285                 return null;
 286         }
 287
 288         public IProcess getProcess() {
 289                 return process;
 290         }
 291
 292         public void setProcess(IProcess process) {
 293                 this.process = process;
 294         }
 295
 296         public PHPDBGProxy getPHPDBGProxy() {
 297                 return phpDBGProxy;
 298         }
 299
 300         public void setPHPDBGProxy(PHPDBGProxy phpDBGProxy) {
 301                 this.phpDBGProxy = phpDBGProxy;
 302         }
 303
 304         /**
 305          * @see ILaunchListener#launchRemoved(ILaunch)
 306          */
 307         public void launchRemoved(ILaunch launch) {
 308                 if (!isTerminated()) {
 309                         return;
 310                 }
 311                 if (launch.equals(getLaunch())) {
 312                         // This target has been deregistered, but it hasn't successfully
 313                         // terminated.
 314                         // Update internal state to reflect that it is disconnected
 315                         terminate();
 316                 }
 317         }
 318
 319         /**
 320          * @see ILaunchListener#launchAdded(ILaunch)
 321          */
 322         public void launchAdded(ILaunch launch) {
 323         }
 324
 325         /**
 326          * @see ILaunchListener#launchChanged(ILaunch)
 327          */
 328         public void launchChanged(ILaunch launch) {
 329         }
 330
 331         /**
 332          * When a debug target or process terminates, terminate DBG Proxy.
 333          *
 334          * @see IDebugEventSetListener#handleDebugEvents(DebugEvent[])
 335          */
 336         public void handleDebugEvents(DebugEvent[] events) {
 337                 for (int i = 0; i < events.length; i++) {
 338                         DebugEvent event = events[i];
 339                         if (event.getKind() == DebugEvent.TERMINATE) {
 340                                 Object source = event.getSource();
 341                                 if (source instanceof PHPDebugTarget
 342                                                 || source instanceof IDebugTarget) {
 343                                         getPHPDBGProxy().stop();
 344                                 } else if (source instanceof IProcess) {
 345                                         if (getDebugTarget().getProcess() == (IProcess) source) {
 346                                                 getPHPDBGProxy().stop();
 347                                         }
 348                                 }
 349                         } else if (event.getKind() == DebugEvent.SUSPEND) {
 350                                 getPHPDBGProxy().pause();
 351                         }
 352                 }
 353         }
 354 }