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src/share/vm/memory/allocation.inline.hpp@7b0e9cba0307 (annotated)

src/share/vm/memory/allocation.inline.hpp

Wed, 13 Jan 2010 15:26:39 -0800

author

ysr

date

Wed, 13 Jan 2010 15:26:39 -0800

changeset 1601

7b0e9cba0307

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6896647: card marks can be deferred too long
Summary: Deferred card marks are now flushed during the gc prologue. Parallel[Scavege,OldGC] and SerialGC no longer defer card marks generated by COMPILER2 as a result of ReduceInitialCardMarks. For these cases, introduced a diagnostic option to defer the card marks, only for the purposes of testing and diagnostics. CMS and G1 continue to defer card marks. Potential performance concern related to single-threaded flushing of deferred card marks in the gc prologue will be addressed in the future.
Reviewed-by: never, johnc

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	// Explicit C-heap memory management
duke@435	26
duke@435	27	void trace_heap_malloc(size_t size, const char* name, void *p);
duke@435	28	void trace_heap_free(void *p);
duke@435	29
duke@435	30
duke@435	31	// allocate using malloc; will fail if no memory available
duke@435	32	inline char* AllocateHeap(size_t size, const char* name = NULL) {
duke@435	33	char* p = (char*) os::malloc(size);
duke@435	34	#ifdef ASSERT
duke@435	35	if (PrintMallocFree) trace_heap_malloc(size, name, p);
duke@435	36	#else
duke@435	37	Unused_Variable(name);
duke@435	38	#endif
duke@435	39	if (p == NULL) vm_exit_out_of_memory(size, name);
duke@435	40	return p;
duke@435	41	}
duke@435	42
duke@435	43	inline char* ReallocateHeap(char *old, size_t size, const char* name = NULL) {
duke@435	44	char* p = (char*) os::realloc(old,size);
duke@435	45	#ifdef ASSERT
duke@435	46	if (PrintMallocFree) trace_heap_malloc(size, name, p);
duke@435	47	#else
duke@435	48	Unused_Variable(name);
duke@435	49	#endif
duke@435	50	if (p == NULL) vm_exit_out_of_memory(size, name);
duke@435	51	return p;
duke@435	52	}
duke@435	53
duke@435	54	inline void FreeHeap(void* p) {
duke@435	55	#ifdef ASSERT
duke@435	56	if (PrintMallocFree) trace_heap_free(p);
duke@435	57	#endif
duke@435	58	os::free(p);
duke@435	59	}