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src/share/vm/runtime/sweeper.hpp@e7b1cc79bd25 (annotated)

src/share/vm/runtime/sweeper.hpp

Tue, 16 Feb 2010 16:17:46 -0800

author

kvn

date

Tue, 16 Feb 2010 16:17:46 -0800

changeset 1698

e7b1cc79bd25

parent 1637

5f24d0319e54

child 1893

bfe29ec02863

permissions

-rw-r--r--

6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
Summary: Define AdapterHandlerTableIterator class as non product instead of debug.
Reviewed-by: never

duke@435	1	/*
duke@435	2	* Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// An NmethodSweeper is an incremental cleaner for:
duke@435	26	// - cleanup inline caches
duke@435	27	// - reclamation of unreferences zombie nmethods
duke@435	28	//
duke@435	29
duke@435	30	class NMethodSweeper : public AllStatic {
duke@435	31	static long _traversals; // Stack traversal count
duke@435	32	static CodeBlob* _current; // Current nmethod
duke@435	33	static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache
duke@435	34	static int _invocations; // No. of invocations left until we are completed with this pass
duke@435	35
duke@435	36	static bool _rescan; // Indicates that we should do a full rescan of the
duke@435	37	// of the code cache looking for work to do.
duke@435	38	static int _locked_seen; // Number of locked nmethods encountered during the scan
duke@435	39	static int _not_entrant_seen_on_stack; // Number of not entrant nmethod were are still on stack
duke@435	40
kvn@1637	41	static bool _was_full; // remember if we did emergency unloading
kvn@1637	42	static jint _advise_to_sweep; // flag to indicate code cache getting full
kvn@1637	43	static jlong _last_was_full; // timestamp of last emergency unloading
kvn@1637	44	static uint _highest_marked; // highest compile id dumped at last emergency unloading
kvn@1637	45	static long _was_full_traversal; // trav number at last emergency unloading
duke@435	46
duke@435	47	static void process_nmethod(nmethod *nm);
duke@435	48	public:
duke@435	49	static long traversal_count() { return _traversals; }
duke@435	50
duke@435	51	static void sweep(); // Invoked at the end of each safepoint
duke@435	52
duke@435	53	static void notify(nmethod* nm) {
duke@435	54	// Perform a full scan of the code cache from the beginning. No
duke@435	55	// need to synchronize the setting of this flag since it only
duke@435	56	// changes to false at safepoint so we can never overwrite it with false.
duke@435	57	_rescan = true;
duke@435	58	}
kvn@1637	59
kvn@1637	60	static void handle_full_code_cache(bool is_full); // Called by compilers who fail to allocate
kvn@1637	61	static void speculative_disconnect_nmethods(bool was_full); // Called by vm op to deal with alloc failure
kvn@1637	62
kvn@1637	63	static void set_was_full(bool state) { _was_full = state; }
kvn@1637	64	static bool was_full() { return _was_full; }
duke@435	65	};