1 /* src/mm/cacao-gc/gc.h - main garbage collector header
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
29 # error Why is the BoehmGC header included???
40 #if defined(ENABLE_THREADS)
41 # include "threads/native/threads.h"
44 #include "toolbox/list.h"
45 #include "vm/jit/replace.h"
48 /* Configuration Switches *****************************************************/
50 #define GCCONF_FINALIZER
51 /*#define GCCONF_HDRFLAG_REFERENCING*/
54 /* Debugging ******************************************************************/
57 /*#define GC_DEBUGGING2*/
59 #if !defined(NDEBUG) && defined(GC_DEBUGGING)
61 # include "vmcore/options.h"
62 # define GC_LOG(code) if (opt_verbosegc) { code; }
63 # define GC_ASSERT(assertion) assert(assertion)
66 # define GC_ASSERT(assertion)
69 #if !defined(NDEBUG) && defined(GC_DEBUGGING2)
70 # define GC_LOG2(code) GC_LOG(code)
72 # define GC_LOG2(code)
76 /* Development Break **********************************************************/
78 #if 0 && defined(ENABLE_THREADS)
79 # error "GC does not work with threads enabled!"
82 #if 1 && defined(ENABLE_INTRP)
83 # error "GC does not work with interpreter enabled!"
86 #if 1 && defined(ENABLE_JVMTI)
87 # error "GC does not work with JVMTI enabled!"
90 #if 1 && !defined(ENABLE_REPLACEMENT)
91 # error "GC does only work with replacement enabled!"
94 #if 1 && !defined(ENABLE_HANDLES)
95 # error "GC does only work with handles (indirection cells) enabled!"
98 #if 1 && !defined(__ALPHA__) && !defined(__ARM__) && !defined(__I386__) && !defined(__POWERPC__) && !defined(__X86_64__) && !defined(__M68K__) && !defined(__SPARC_64__)
99 # error "GC was only ported to some architectures so far!"
103 /* Helper Macros **************************************************************/
105 #define GC_SET_FLAGS(obj, flags) ((obj)->hdrflags |= (flags))
106 #define GC_CLEAR_FLAGS(obj, flags) ((obj)->hdrflags &= ~(flags))
107 #define GC_TEST_FLAGS(obj, flags) ((obj)->hdrflags & (flags))
109 #define POINTS_INTO(ptr, ptr_start, ptr_end) \
110 ((void *) (ptr) >= (ptr_start) && (void *) (ptr) < (ptr_end))
112 #define GC_ALIGN_SIZE SIZEOF_VOID_P
113 #define GC_ALIGN(val,size) ((((val) + (size) - 1) / (size)) * (size))
116 /* Global Variables ***********************************************************/
118 extern bool gc_pending;
119 extern bool gc_notify_finalizer;
121 extern list_t *gc_reflist;
124 /* Structures *****************************************************************/
126 typedef struct list_gcref_entry_t list_gcref_entry_t;
128 struct list_gcref_entry_t {
137 /* No-Thread specific stuff ***************************************************/
139 #if defined(ENABLE_THREADS)
140 # define GC_EXECUTIONSTATE (thread->es)
141 # define GC_SOURCESTATE (thread->ss)
143 # define GC_EXECUTIONSTATE (_no_threads_executionstate)
144 # define GC_SOURCESTATE (_no_threads_sourcestate)
146 extern executionstate_t *_no_threads_executionstate;
147 extern sourcestate_t *_no_threads_sourcestate;
152 /* Prototypes *****************************************************************/
154 void gc_collect(s4 level);
156 #if defined(ENABLE_THREADS)
157 bool gc_suspend(threadobject *thread, u1 *pc, u1 *sp);
161 /* Statistics *****************************************************************/
163 #if defined(ENABLE_STATISTICS)
165 #define GCSTAT_INIT(cnt) { (cnt) = 0; }
166 #define GCSTAT_COUNT(cnt) { (cnt)++; }
167 #define GCSTAT_DEC(cnt) { (cnt)--; GC_ASSERT((cnt) >= 0); }
168 #define GCSTAT_COUNT_MAX(cnt,max) { (cnt)++; if ((cnt) > (max)) (max) = (cnt); }
170 extern int gcstat_collections;
171 extern int gcstat_collections_forced;
172 extern int gcstat_mark_depth;
173 extern int gcstat_mark_depth_max;
174 extern int gcstat_mark_count;
176 void gcstat_println();
178 #else /* defined(ENABLE_STATISTICS) */
180 #define GCSTAT_INIT(cnt)
181 #define GCSTAT_COUNT(cnt)
182 #define GCSTAT_DEC(cnt)
183 #define GCSTAT_COUNT_MAX(cnt,max)
185 #endif /* defined(ENABLE_STATISTICS) */
191 * These are local overrides for various environment variables in Emacs.
192 * Please do not remove this and leave it at the end of the file, where
193 * Emacs will automagically detect them.
194 * ---------------------------------------------------------------------
197 * indent-tabs-mode: t
201 * vim:noexpandtab:sw=4:ts=4: