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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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7
hotspot/src/share/vm/runtime/perfData.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2001, 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
@ -213,7 +213,10 @@ PerfLongVariant::PerfLongVariant(CounterNS ns, const char* namep, Units u,
void PerfLongVariant::sample() {
assert(_sample_helper != NULL || _sampled != NULL, "unexpected state");
// JJJ - This should not happen. Maybe the first sample is taken
// while the _sample_helper is being null'ed out.
// assert(_sample_helper != NULL || _sampled != NULL, "unexpected state");
if (_sample_helper == NULL) return;
if (_sample_helper != NULL) {
*(jlong*)_valuep = _sample_helper->take_sample();