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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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8
hotspot/src/share/vm/memory/memRegion.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 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
@ -36,6 +36,8 @@
// The intent is that they remain very small and contain no
// objects.
class MetaWord;
class MemRegion VALUE_OBJ_CLASS_SPEC {
friend class VMStructs;
private:
@ -50,6 +52,10 @@ public:
_start(start), _word_size(pointer_delta(end, start)) {
assert(end >= start, "incorrect constructor arguments");
}
MemRegion(MetaWord* start, MetaWord* end) :
_start((HeapWord*)start), _word_size(pointer_delta(end, start)) {
assert(end >= start, "incorrect constructor arguments");
}
MemRegion(const MemRegion& mr): _start(mr._start), _word_size(mr._word_size) {}