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comparison src/share/vm/memory/referenceProcessor.hpp @ 6725:da91efe96a93

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6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents d2a62e0f25eb
children ebb32c4589f3 f2110083203d
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6724:36d1d483d5d6 6725:da91efe96a93
1 /* 1 /*
2 * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
343 // its (strong) reachability and the second is a closure that 343 // its (strong) reachability and the second is a closure that
344 // may be used to incrementalize or abort the precleaning process. 344 // may be used to incrementalize or abort the precleaning process.
345 // The caller is responsible for taking care of potential 345 // The caller is responsible for taking care of potential
346 // interference with concurrent operations on these lists 346 // interference with concurrent operations on these lists
347 // (or predicates involved) by other threads. Currently 347 // (or predicates involved) by other threads. Currently
348 // only used by the CMS collector. should_unload_classes is 348 // only used by the CMS collector.
349 // used to aid assertion checking when classes are collected.
350 void preclean_discovered_references(BoolObjectClosure* is_alive, 349 void preclean_discovered_references(BoolObjectClosure* is_alive,
351 OopClosure* keep_alive, 350 OopClosure* keep_alive,
352 VoidClosure* complete_gc, 351 VoidClosure* complete_gc,
353 YieldClosure* yield, 352 YieldClosure* yield);
354 bool should_unload_classes);
355 353
356 // Delete entries in the discovered lists that have 354 // Delete entries in the discovered lists that have
357 // either a null referent or are not active. Such 355 // either a null referent or are not active. Such
358 // Reference objects can result from the clearing 356 // Reference objects can result from the clearing
359 // or enqueueing of Reference objects concurrent 357 // or enqueueing of Reference objects concurrent
494 // iterate over oops 492 // iterate over oops
495 void weak_oops_do(OopClosure* f); // weak roots 493 void weak_oops_do(OopClosure* f); // weak roots
496 494
497 // Balance each of the discovered lists. 495 // Balance each of the discovered lists.
498 void balance_all_queues(); 496 void balance_all_queues();
497 void verify_list(DiscoveredList& ref_list);
499 498
500 // Discover a Reference object, using appropriate discovery criteria 499 // Discover a Reference object, using appropriate discovery criteria
501 bool discover_reference(oop obj, ReferenceType rt); 500 bool discover_reference(oop obj, ReferenceType rt);
502 501
503 // Process references found during GC (called by the garbage collector) 502 // Process references found during GC (called by the garbage collector)