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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.phpdt.internal.debug.core.breakpoints.PHPLineBreakpoint;
  17 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  18
  19 import org.eclipse.core.resources.IMarkerDelta;
  20 import org.eclipse.core.runtime.CoreException;
  21 import org.eclipse.debug.core.DebugEvent;
  22 import org.eclipse.debug.core.DebugException;
  23 import org.eclipse.debug.core.DebugPlugin;
  24 import org.eclipse.debug.core.IBreakpointManager;
  25 import org.eclipse.debug.core.IDebugEventSetListener;
  26 import org.eclipse.debug.core.ILaunch;
  27 import org.eclipse.debug.core.ILaunchListener;
  28 import org.eclipse.debug.core.model.IBreakpoint;
  29 import org.eclipse.debug.core.model.IDebugTarget;
  30 import org.eclipse.debug.core.model.IMemoryBlock;
  31 import org.eclipse.debug.core.model.IProcess;
  32 import org.eclipse.debug.core.model.IStackFrame;
  33 import org.eclipse.debug.core.model.IThread;
  34 import org.eclipse.jface.resource.ImageDescriptor;
  35 import org.eclipse.ui.model.IWorkbenchAdapter;
  36
  37 /**
  38  * Debug target for PHP debug model.
  39  */
  40 public class PHPDebugTarget extends PHPDebugElement implements IPHPDebugTarget, ILaunchListener,
  41                 IDebugEventSetListener {
  42
  43         private IProcess process;
  44
  45         private ILaunch launch;
  46
  47         private PHPThread[] threads = new PHPThread[0];
  48
  49         private PHPDBGProxy phpDBGProxy;
  50
  51         private class State {
  52                 private boolean isTerminated = false;
  53
  54                 private boolean isSuspended = false;
  55
  56                 boolean isTerminated() {
  57                         return isTerminated;
  58                 }
  59
  60                 boolean isSuspended() {
  61                         return isSuspended;
  62                 }
  63
  64                 void setTerminated(boolean terminated) {
  65                         this.isTerminated = terminated;
  66                 }
  67
  68                 void setSuspended(boolean suspended) {
  69                         if (isTerminated())
  70                                 throw new IllegalStateException();
  71                         this.isSuspended = suspended;
  72                 }
  73         }
  74
  75         private final State state = new State();
  76
  77         public PHPDebugTarget(ILaunch launch, IProcess process) {
  78                 super (null);
  79                 if (null == launch && null == process)
  80                         throw new IllegalArgumentException();
  81                 this.launch = launch;
  82                 this.process = process;
  83                 // TODO XXX remove breakpoint listener at termination to avoid live leak
  84                 IBreakpointManager manager = DebugPlugin.getDefault()
  85                                 .getBreakpointManager();
  86                 manager.addBreakpointListener(this);
  87                 DebugPlugin.getDefault().addDebugEventListener(this);
  88                 initialize();
  89         }
  90
  91         protected synchronized void initialize() {
  92                 DebugEvent ev = new DebugEvent(this, DebugEvent.CREATE);
  93                 DebugPlugin.getDefault().fireDebugEventSet(new DebugEvent[] { ev });
  94         }
  95
  96         public void addThread(PHPThread phpThread) {
  97                 int i;
  98                 PHPThread[] updatedThreads = new PHPThread[threads.length + 1];
  99
 100                 for (i = 0; i < threads.length; i++) {
 101                         updatedThreads[i] = threads[i];
 102                 }
 103                 updatedThreads[i] = phpThread;
 104                 threads = updatedThreads;
 105
 106                 fireChangeEvent();
 107                 fireThreadCreateEvent(phpThread);
 108         }
 109
 110         public void updateThreads (PHPThread phpThread) {
 111                 fireChangeEvent ();
 112                 fireThreadCreateEvent (phpThread);
 113         }
 114
 115         private void fireChangeEvent() {
 116                 DebugEvent ev = new DebugEvent(this, DebugEvent.CHANGE);
 117                 DebugPlugin.getDefault().fireDebugEventSet(new DebugEvent[] { ev });
 118         }
 119
 120         private void fireThreadCreateEvent(PHPThread phpThread) {
 121                 DebugEvent ev = new DebugEvent(phpThread, DebugEvent.CREATE);
 122                 DebugPlugin.getDefault().fireDebugEventSet(new DebugEvent[] { ev });
 123         }
 124
 125 //      protected PHPThread getThreadById(int id) {
 126 //              for (int i = 0; i < threads.length; i++) {
 127 //                      if (threads[i].getId() == id) {
 128 //                              return threads[i];
 129 //                      }
 130 //              }
 131 //              return null;
 132 //      }
 133
 134         public IThread[] getThreads() {
 135                 return threads;
 136         }
 137
 138         public boolean hasThreads() throws DebugException {
 139                 return threads.length > 0;
 140         }
 141
 142         public String getName() throws DebugException {
 143                 return "PHP Debugger at localhost:" + getPHPDBGProxy().getPort();
 144         }
 145
 146         public boolean supportsBreakpoint(IBreakpoint arg0) {
 147                 if (arg0.getModelIdentifier().equals(PHPDebugCorePlugin.PLUGIN_ID)) {
 148                         return true;
 149                 }
 150                 return false;
 151         }
 152
 153         public String getModelIdentifier() {
 154                 return PHPDebugCorePlugin.PLUGIN_ID;
 155         }
 156
 157         public IStackFrame[] getStackFrames () throws DebugException {
 158                 return (IStackFrame[]) this.phpDBGProxy.getDBGInterface ().getStackList ();
 159         }
 160
 161         public IDebugTarget getDebugTarget() {
 162                 return this;
 163         }
 164
 165         public ILaunch getLaunch() {
 166                 return launch;
 167         }
 168
 169         public synchronized boolean canTerminate() {
 170                 return !isTerminated();
 171         }
 172
 173         public synchronized boolean isTerminated() {
 174                 return state.isTerminated();
 175         }
 176
 177         private synchronized void terminateThreads () {
 178                 int i;
 179
 180                 try {
 181                         for (i = 0; i < threads.length; i++) {
 182                                 threads[i].terminate ();
 183                         }
 184                 } catch (DebugException e) {
 185                 }
 186         }
 187
 188         public synchronized void terminate() {
 189                 // This method is synchronized to control a race condition between the
 190                 // UI thread that terminates the debugging session, and the slave
 191                 // thread that executes PHPLoop.run
 192                 if (isTerminated())
 193                         // Avoid terminating twice...
 194                         return;
 195                 state.setTerminated(true);
 196                 phpDBGProxy.stop();
 197                 terminateThreads ();
 198                 this.threads = new PHPThread[0];
 199                 fireChangeEvent();
 200                 IBreakpointManager manager = DebugPlugin.getDefault()
 201                                 .getBreakpointManager();
 202                 manager.removeBreakpointListener(this);
 203                 DebugPlugin.getDefault().removeDebugEventListener(this);
 204         }
 205
 206         public synchronized boolean canResume() {
 207                 if (isTerminated())
 208                         return false;
 209                 return isSuspended();
 210         }
 211
 212         public synchronized boolean canSuspend() {
 213                 if (isTerminated())
 214                         return false;
 215                 return !isSuspended();
 216         }
 217
 218         public synchronized boolean isSuspended() {
 219                 return state.isSuspended();
 220         }
 221
 222         public synchronized void resume() throws DebugException {
 223                 if (!isSuspended())
 224                         return;
 225                 state.setSuspended(false);
 226                 this.getPHPDBGProxy().resume();
 227                 IThread[] threads = getThreads();
 228                 for (int i = 0; i < threads.length; ++i)
 229                         threads[i].resume();
 230         }
 231
 232         public synchronized void suspend() throws DebugException {
 233                 if (isSuspended())
 234                         return;
 235                 this.getPHPDBGProxy().pause();
 236                 state.setSuspended(true);
 237                 IThread[] threads = getThreads();
 238                 for (int i = 0; i < threads.length; ++i)
 239                         threads[i].suspend();
 240         }
 241
 242         public void breakpointAdded(IBreakpoint breakpoint) {
 243                 this.getPHPDBGProxy().addBreakpoint(breakpoint);
 244         }
 245
 246         public void breakpointRemoved(IBreakpoint breakpoint, IMarkerDelta arg1) {
 247                 this.getPHPDBGProxy().removeBreakpoint(breakpoint);
 248         }
 249
 250         /**
 251          * The method will be called when the user enables/disables
 252          * breakpoints. In this case we add or remove the breakpoint.
 253          * It's also called when leaving the breakpoint properties dialog
 254          * (skip count and breakpoint condition) with the OK button.
 255          *
 256          * This method is also called whenever a source file has changed.
 257          * In this case we terminate since the source will be out of sync with the debugger.
 258          * TODO Is it correct to call this method when a sourcefile is modified?
 259          *
 260          */
 261         public void breakpointChanged (IBreakpoint breakpoint, IMarkerDelta arg1) {
 262                 PHPLineBreakpoint bp;
 263                 bp = (PHPLineBreakpoint) breakpoint;
 264
 265                 try {
 266                         if (breakpoint.isEnabled ()     &&                                                                      // Check if breakpoint state changed from disabled to enabled
 267                                 !arg1.getAttribute ("org.eclipse.debug.core.enabled", false)) {
 268                                 this.getPHPDBGProxy().addBreakpoint(breakpoint);
 269                         }
 270                         else if (!breakpoint.isEnabled () &&                                                    // Check if breakpoint state changed from enabled to disabled
 271                             arg1.getAttribute ("org.eclipse.debug.core.enabled", true)) {
 272                                 this.getPHPDBGProxy().removeBreakpoint(breakpoint);
 273                         }
 274                         else if (bp.getChangeID() != arg1.getAttribute ("net.sourceforge.phpeclipse.debug.changeID", 0)) {
 275                                 if (breakpoint.isEnabled()) {                                                           // If the breakpoint is already enabled
 276                                         this.getPHPDBGProxy().removeBreakpoint(breakpoint);             // we remove this breakpoint first
 277                                         this.getPHPDBGProxy().addBreakpoint(breakpoint);                // and then we add again (else DBG would have two breakpoints!).
 278                                 }
 279                                 else {
 280                                         this.getPHPDBGProxy().removeBreakpoint(breakpoint);
 281                                 }
 282                         }
 283                         else {                                                                                                                  // All other cases will terminate the debugger
 284                                 terminate ();
 285                         }
 286                 } catch (CoreException e) {
 287                         // Do nothing
 288                 }
 289         }
 290
 291         public boolean canDisconnect() {
 292                 return false;
 293         }
 294
 295         public void disconnect() throws DebugException {
 296         }
 297
 298         public boolean isDisconnected() {
 299                 return false;
 300         }
 301
 302         public boolean supportsStorageRetrieval() {
 303                 return false;
 304         }
 305
 306         public IMemoryBlock getMemoryBlock(long arg0, long arg1)
 307                         throws DebugException {
 308                 return null;
 309         }
 310
 311         public Object getAdapter(Class arg0) {
 312                 if (IWorkbenchAdapter.class.equals(arg0)) {
 313                         return new IWorkbenchAdapter() {
 314                                 public Object[] getChildren(Object o) {
 315                                         Object[] children = null;
 316                                         IThread[] threads = getThreads();
 317                                         if (null != threads) {
 318                                                 children = new Object[threads.length];
 319                                                 for (int i = 0; i < threads.length; ++i)
 320                                                         children[i] = threads[i];
 321                                         }
 322                                         return children;
 323                                 }
 324
 325                                 public ImageDescriptor getImageDescriptor(Object object) {
 326                                         return null;
 327                                 }
 328
 329                                 public String getLabel(Object o) {
 330                                         String label = "(Unable to look up name... check error log)";
 331                                         try {
 332                                                 label = getName();
 333                                         } catch (DebugException x) {
 334                                                 PHPeclipsePlugin.log(label, x);
 335                                         }
 336                                         return label;
 337                                 }
 338
 339                                 public Object getParent(Object o) {
 340                                         return PHPDebugTarget.this.getLaunch();
 341                                 }
 342                         };
 343                 }
 344                 else {
 345                     if (arg0 == PHPDebugElement.class) {
 346                         return this;
 347                     }
 348
 349                     return super.getAdapter(arg0);
 350                 }
 351         }
 352
 353         public IProcess getProcess() {
 354                 return process;
 355         }
 356
 357         public void setProcess(IProcess process) {
 358                 this.process = process;
 359         }
 360
 361         public PHPDBGProxy getPHPDBGProxy() {
 362                 return phpDBGProxy;
 363         }
 364
 365         public void setPHPDBGProxy(PHPDBGProxy phpDBGProxy) {
 366                 this.phpDBGProxy = phpDBGProxy;
 367         }
 368
 369         /**
 370          * @see ILaunchListener#launchRemoved(ILaunch)
 371          */
 372         public void launchRemoved(ILaunch launch) {
 373                 if (!isTerminated()) {
 374                         return;
 375                 }
 376                 if (launch.equals(getLaunch())) {
 377                         // This target has been deregistered, but it hasn't successfully
 378                         // terminated.
 379                         // Update internal state to reflect that it is disconnected
 380                         terminate();
 381                 }
 382         }
 383
 384         /**
 385          * @see ILaunchListener#launchAdded(ILaunch)
 386          */
 387         public void launchAdded(ILaunch launch) {
 388         }
 389
 390         /**
 391          * @see ILaunchListener#launchChanged(ILaunch)
 392          */
 393         public void launchChanged(ILaunch launch) {
 394         }
 395
 396         /**
 397          * When a debug target or process terminates, terminate DBG Proxy.
 398          *
 399          * @see IDebugEventSetListener#handleDebugEvents(DebugEvent[])
 400          */
 401         public void handleDebugEvents(DebugEvent[] events) {
 402                 for (int i = 0; i < events.length; i++) {
 403                         DebugEvent event = events[i];
 404                         if (event.getKind() == DebugEvent.TERMINATE) {
 405                                 Object source = event.getSource();
 406                                 if (source instanceof PHPDebugTarget
 407                                                 || source instanceof IDebugTarget) {
 408                                         getPHPDBGProxy().stop();
 409                                 } else if (source instanceof IProcess) {
 410                                         if (getDebugTarget().getProcess() == (IProcess) source) {
 411                                                 getPHPDBGProxy().stop();
 412                                         }
 413                                 }
 414                         } else if (event.getKind() == DebugEvent.SUSPEND) {
 415                                 getPHPDBGProxy().pause();
 416                         }
 417                 }
 418         }
 419 }