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