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6964458: Reimplement class meta-data storage to use native memory

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Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes

Co-authored-by: Stefan Karlsson <stefan.karlsson@oracle.com>
Co-authored-by: Mikael Gerdin <mikael.gerdin@oracle.com>
Co-authored-by: Tom Rodriguez <tom.rodriguez@oracle.com>
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
This commit is contained in:
Jon Masamitsu 2012-09-01 13:25:18 -04:00 • committed by Coleen Phillimore
parent 36eee7c8c8
commit 5c58d27aac
853 changed files with 26124 additions and 82956 deletions
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6
hotspot/src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2005, 2012, Oracle and/or its affiliates. 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
@ -74,6 +74,7 @@ void MarkFromRootsTask::do_it(GCTaskManager* manager, uint which) {
ParCompactionManager* cm =
ParCompactionManager::gc_thread_compaction_manager(which);
PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
PSParallelCompact::FollowKlassClosure follow_klass_closure(&mark_and_push_closure);
switch (_root_type) {
case universe:
@ -110,6 +111,7 @@ void MarkFromRootsTask::do_it(GCTaskManager* manager, uint which) {
case system_dictionary:
SystemDictionary::always_strong_oops_do(&mark_and_push_closure);
ClassLoaderDataGraph::always_strong_oops_do(&mark_and_push_closure, &follow_klass_closure, true);
break;
case code_cache:
@ -202,7 +204,7 @@ void StealMarkingTask::do_it(GCTaskManager* manager, uint which) {
int random_seed = 17;
do {
while (ParCompactionManager::steal_objarray(which, &random_seed, task)) {
objArrayKlass* const k = (objArrayKlass*)task.obj()->blueprint();
objArrayKlass* const k = (objArrayKlass*)task.obj()->klass();
k->oop_follow_contents(cm, task.obj(), task.index());
cm->follow_marking_stacks();
}