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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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14
hotspot/src/share/vm/gc_implementation/parallelScavenge/cardTableExtension.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
@ -89,7 +89,7 @@ class CheckForUnmarkedObjects : public ObjectClosure {
// fail unless the object head is also unmarked.
virtual void do_object(oop obj) {
CheckForUnmarkedOops object_check(_young_gen, _card_table);
obj->oop_iterate(&object_check);
obj->oop_iterate_no_header(&object_check);
if (object_check.has_unmarked_oop()) {
assert(_card_table->addr_is_marked_imprecise(obj), "Found unmarked young_gen object");
}
@ -229,8 +229,9 @@ void CardTableExtension::scavenge_contents_parallel(ObjectStartArray* start_arra
int dirty_card_count = 0;
oop* sp_top = (oop*)space_top;
oop* sp_last = sp->bottom() == space_top ? sp_top : sp_top - 1;
jbyte* start_card = byte_for(sp->bottom());
jbyte* end_card = byte_for(sp_top - 1) + 1;
jbyte* end_card = byte_for(sp_last) + 1;
oop* last_scanned = NULL; // Prevent scanning objects more than once
// The width of the stripe ssize*stripe_total must be
// consistent with the number of stripes so that the complete slice
@ -406,10 +407,8 @@ void CardTableExtension::verify_all_young_refs_imprecise() {
assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
PSOldGen* old_gen = heap->old_gen();
PSPermGen* perm_gen = heap->perm_gen();
old_gen->object_iterate(&check);
perm_gen->object_iterate(&check);
}
// This should be called immediately after a scavenge, before mutators resume.
@ -418,15 +417,12 @@ void CardTableExtension::verify_all_young_refs_precise() {
assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
PSOldGen* old_gen = heap->old_gen();
PSPermGen* perm_gen = heap->perm_gen();
CheckForPreciseMarks check(heap->young_gen(), (CardTableExtension*)heap->barrier_set());
old_gen->oop_iterate(&check);
perm_gen->oop_iterate(&check);
old_gen->oop_iterate_no_header(&check);
verify_all_young_refs_precise_helper(old_gen->object_space()->used_region());
verify_all_young_refs_precise_helper(perm_gen->object_space()->used_region());
}
void CardTableExtension::verify_all_young_refs_precise_helper(MemRegion mr) {