1 /* mm/cacao-gc/region.c - GC module for region management
3 Copyright (C) 2006 R. Grafl, A. Krall, C. Kruegel,
4 C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
5 E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
6 J. Wenninger, Institut f. Computersprachen - TU Wien
8 This file is part of CACAO.
10 This program is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2, or (at
13 your option) any later version.
15 This program is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
25 Contact: cacao@cacaojvm.org
27 Authors: Michael Starzinger
38 #include "mm/memory.h"
39 #include "toolbox/logging.h"
42 /* region_init *****************************************************************
44 Allocates the memory for a heap region and initiates the regioninfo struct
47 *******************************************************************************/
49 void *region_create(regioninfo_t *region, u4 size)
53 /* some sanity check */
56 /* allocate memory for the region */
62 /* initiate structure */
64 region->end = ptr + size;
69 #if defined(ENABLE_MEMCHECK)
70 /* poison this region */
71 /* TODO: this should really be done MNEW above! */
72 region_invalidate(region);
75 GC_LOG( dolog("GC: Region allocated at [ %p ; %p ]", region->base, region->end); );
81 /* region_invalidate ***********************************************************
83 Invalidates the free memory area inside a heap region by overwriting it with
86 REMEMBER: The region has to be compacted for this to work properly.
88 *******************************************************************************/
90 #if defined(ENABLE_MEMCHECK)
91 void region_invalidate(regioninfo_t *region)
93 /* some sanity check */
94 GC_ASSERT(region->free == region->end - region->ptr);
96 /* invalidate free memory */
97 memset(region->ptr, MEMORY_CLEAR_BYTE, region->free);
99 #endif /* defined(ENABLE_MEMCHECK) */
103 * These are local overrides for various environment variables in Emacs.
104 * Please do not remove this and leave it at the end of the file, where
105 * Emacs will automagically detect them.
106 * ---------------------------------------------------------------------
109 * indent-tabs-mode: t
113 * vim:noexpandtab:sw=4:ts=4: