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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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10
hotspot/src/share/vm/runtime/biasedLocking.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2005, 2010, 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
@ -38,7 +38,7 @@ BiasedLockingCounters BiasedLocking::_counters;
static GrowableArray<Handle>* _preserved_oop_stack = NULL;
static GrowableArray<markOop>* _preserved_mark_stack = NULL;
static void enable_biased_locking(klassOop k) {
static void enable_biased_locking(Klass* k) {
Klass::cast(k)->set_prototype_header(markOopDesc::biased_locking_prototype());
}
@ -276,7 +276,7 @@ static HeuristicsResult update_heuristics(oop o, bool allow_rebias) {
// 2. Revoke the biases of all objects in the heap of this type
// and don't allow rebiasing of these objects. Disable
// allocation of objects of that type with the bias bit set.
Klass* k = o->blueprint();
Klass* k = o->klass();
jlong cur_time = os::javaTimeMillis();
jlong last_bulk_revocation_time = k->last_biased_lock_bulk_revocation_time();
int revocation_count = k->biased_lock_revocation_count();
@ -330,10 +330,10 @@ static BiasedLocking::Condition bulk_revoke_or_rebias_at_safepoint(oop o,
}
jlong cur_time = os::javaTimeMillis();
o->blueprint()->set_last_biased_lock_bulk_revocation_time(cur_time);
o->klass()->set_last_biased_lock_bulk_revocation_time(cur_time);
klassOop k_o = o->klass();
Klass* k_o = o->klass();
Klass* klass = Klass::cast(k_o);
if (bulk_rebias) {