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

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Correctly count full GC operations for framework collectors. Add ForceFullGCJVMTIEpilogues as a future work around if needed.

Reviewed-by: jcoomes, alanb, ysr
This commit is contained in:
Daniel D. Daugherty 2009-07-28 13:35:00 -06:00
parent ac1f463988
commit 40de9c5fcc
3 changed files with 17 additions and 3 deletions
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8
hotspot/src/share/vm/memory/genCollectedHeap.cpp
View file

@ -1,5 +1,5 @@
/*
* 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());

7
hotspot/src/share/vm/prims/jvmtiExport.cpp
View file

@ -1,5 +1,5 @@
/*
* 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.

5
hotspot/src/share/vm/runtime/globals.hpp
View file

@ -1,5 +1,5 @@
/*
* 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. */ \