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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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26
hotspot/src/share/vm/memory/allocation.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 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
@ -25,7 +25,10 @@
#include "precompiled.hpp"
#include "memory/allocation.hpp"
#include "memory/allocation.inline.hpp"
#include "memory/genCollectedHeap.hpp"
#include "memory/metaspaceShared.hpp"
#include "memory/resourceArea.hpp"
#include "memory/universe.hpp"
#include "runtime/atomic.hpp"
#include "runtime/os.hpp"
#include "runtime/task.hpp"
@ -51,6 +54,27 @@ void StackObj::operator delete(void* p) { ShouldNotCallThis(); };
void* _ValueObj::operator new(size_t size) { ShouldNotCallThis(); return 0; };
void _ValueObj::operator delete(void* p) { ShouldNotCallThis(); };
void* MetaspaceObj::operator new(size_t size, ClassLoaderData* loader_data,
size_t word_size, bool read_only, TRAPS) {
// Klass has it's own operator new
return Metaspace::allocate(loader_data, word_size, read_only,
Metaspace::NonClassType, CHECK_NULL);
}
bool MetaspaceObj::is_shared() const {
return MetaspaceShared::is_in_shared_space(this);
}
bool MetaspaceObj::is_metadata() const {
// ClassLoaderDataGraph::contains((address)this); has lock inversion problems
return !Universe::heap()->is_in_reserved(this);
}
void MetaspaceObj::print_address_on(outputStream* st) const {
st->print(" {"INTPTR_FORMAT"}", this);
}
void* ResourceObj::operator new(size_t size, allocation_type type, MEMFLAGS flags) {
address res;
switch (type) {