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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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30
hotspot/src/share/vm/oops/instanceRefKlass.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2010, 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
@ -27,7 +27,7 @@
#include "oops/instanceKlass.hpp"
// An instanceRefKlass is a specialized instanceKlass for Java
// An instanceRefKlass is a specialized InstanceKlass for Java
// classes that are subclasses of java/lang/ref/Reference.
//
// These classes are used to implement soft/weak/final/phantom
@ -44,20 +44,24 @@
// and the pending list lock object in the same class is notified.
class instanceRefKlass: public instanceKlass {
class instanceRefKlass: public InstanceKlass {
friend class InstanceKlass;
// Constructor
instanceRefKlass(int vtable_len, int itable_len, int static_field_size, int nonstatic_oop_map_size, ReferenceType rt, AccessFlags access_flags, bool is_anonymous)
: InstanceKlass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, access_flags, is_anonymous) {}
public:
instanceRefKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
// Type testing
bool oop_is_instanceRef() const { return true; }
// Casting from klassOop
static instanceRefKlass* cast(klassOop k) {
assert(k->klass_part()->oop_is_instanceRef(), "cast to instanceRefKlass");
return (instanceRefKlass*) k->klass_part();
// Casting from Klass*
static instanceRefKlass* cast(Klass* k) {
assert(k->oop_is_instanceRef(), "cast to instanceRefKlass");
return (instanceRefKlass*) k;
}
// allocation
DEFINE_ALLOCATE_PERMANENT(instanceRefKlass);
// Garbage collection
int oop_adjust_pointers(oop obj);
void oop_follow_contents(oop obj);
@ -65,10 +69,10 @@ class instanceRefKlass: public instanceKlass {
// Parallel Scavenge and Parallel Old
PARALLEL_GC_DECLS
int oop_oop_iterate(oop obj, OopClosure* blk) {
int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {
return oop_oop_iterate_v(obj, blk);
}
int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) {
return oop_oop_iterate_v_m(obj, blk, mr);
}
@ -93,7 +97,7 @@ class instanceRefKlass: public instanceKlass {
// Update non-static oop maps so 'referent', 'nextPending' and
// 'discovered' will look like non-oops
static void update_nonstatic_oop_maps(klassOop k);
static void update_nonstatic_oop_maps(Klass* k);
public:
// Verification