6862295: JDWP threadid changes during debugging session (leading to ingored breakpoints)

Summary: Correctly count full GC operations for framework collectors. Add ForceFullGCJVMTIEpilogues as a future work around if needed.
Reviewed-by: jcoomes, alanb, ysr

src/share/vm/memory/genCollectedHeap.cpp

 /*
- * Copyright 2000-2008 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 2000-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -456,6 +456,12 @@ void GenCollectedHeap::do_collection(bool  full,
     int max_level_collected = starting_level;
     for (int i = starting_level; i <= max_level; i++) {
       if (_gens[i]->should_collect(full, size, is_tlab)) {
+        if (i == n_gens() - 1) {  // a major collection is to happen
+          if (!complete) {
+            // The full_collections increment was missed above.
+            increment_total_full_collections();
+          }
+        }
         // Timer for individual generations. Last argument is false: no CR
         TraceTime t1(_gens[i]->short_name(), PrintGCDetails, false, gclog_or_tty);
         TraceCollectorStats tcs(_gens[i]->counters());

src/share/vm/prims/jvmtiExport.cpp

 /*
- * Copyright 2003-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 2003-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -2421,6 +2421,11 @@ JvmtiGCMarker::JvmtiGCMarker(bool full) : _full(full), _invocation_count(0) {
     return;
   }
 
+  if (ForceFullGCJVMTIEpilogues) {
+    // force 'Full GC' was done semantics for JVMTI GC epilogues
+    _full = true;
+  }
+
   // GarbageCollectionStart event posted from VM thread - okay because
   // JVMTI is clear that the "world is stopped" and callback shouldn't
   // try to call into the VM.

src/share/vm/runtime/globals.hpp

 /*
- * Copyright 1997-2008 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1053,6 +1053,9 @@ class CommandLineFlags {
   product(ccstr, TraceJVMTI, NULL,                                          \
           "Trace flags for JVMTI functions and events")                     \
                                                                             \
+  product(bool, ForceFullGCJVMTIEpilogues, false,                           \
+          "Force 'Full GC' was done semantics for JVMTI GC epilogues")      \
+                                                                            \
   /* This option can change an EMCP method into an obsolete method. */      \
   /* This can affect tests that except specific methods to be EMCP. */      \
   /* This option should be used with caution. */                            \