442     }
 443 
 444     /**
 445      * Shows stack memory for threads which have crashed (defined as
 446      * having taken a signal above a Java frame)
 447      *
 448      * @return a flag which indicates if crashes were encountered.
 449      */
 450     private boolean fireShowThreadCrashes() {
 451         Optional<JavaThread> crashed =
 452                          cachedThreads.stream()
 453                                       .map(t -> t.getThread())
 454                                       .filter(t -> t.getAddress().equals(
 455                                                         crashThread.getValue()))
 456                                       .findAny();
 457         crashed.ifPresent(this::showThreadStackMemory);
 458         return crashed.isPresent();
 459     }
 460 
 461     private void cache() {
 462         Threads threads = VM.getVM().getThreads();
 463         for (JavaThread t = threads.first(); t != null; t = t.next()) {
 464             if (t.isJavaThread()) {
 465                 cachedThreads.add(new CachedThread(t));
 466             }
 467         }
 468     }
 469 
 470     private void decache() {
 471         cachedThreads.clear();
 472     }
 473 
 474 }

 442     }
 443 
 444     /**
 445      * Shows stack memory for threads which have crashed (defined as
 446      * having taken a signal above a Java frame)
 447      *
 448      * @return a flag which indicates if crashes were encountered.
 449      */
 450     private boolean fireShowThreadCrashes() {
 451         Optional<JavaThread> crashed =
 452                          cachedThreads.stream()
 453                                       .map(t -> t.getThread())
 454                                       .filter(t -> t.getAddress().equals(
 455                                                         crashThread.getValue()))
 456                                       .findAny();
 457         crashed.ifPresent(this::showThreadStackMemory);
 458         return crashed.isPresent();
 459     }
 460 
 461     private void cache() {
 462         VM.getVM().getThreads().doJavaThreads((t) -> {

 463             if (t.isJavaThread()) {
 464                 cachedThreads.add(new CachedThread(t));
 465             }
 466         });
 467     }
 468 
 469     private void decache() {
 470         cachedThreads.clear();
 471     }
 472 
 473 }