1 /* mm/boehm.c - interface for boehm gc
3 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
4 R. Grafl, A. Krall, C. Kruegel, C. Oates, R. Obermaisser,
5 M. Probst, S. Ring, E. Steiner, C. Thalinger, D. Thuernbeck,
6 P. Tomsich, J. Wenninger
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., 59 Temple Place - Suite 330, Boston, MA
25 Contact: cacao@complang.tuwien.ac.at
29 $Id: boehm.c 1378 2004-08-01 22:34:16Z stefan $
33 #if defined(USE_THREADS) && defined(NATIVE_THREADS) && defined(__LINUX__)
34 #define GC_LINUX_THREADS
36 #if defined(USE_THREADS) && defined(NATIVE_THREADS) && defined(__IRIX__)
37 #define GC_IRIX_THREADS
44 #include "exceptions.h"
49 #include "threads/thread.h"
50 #include "toolbox/logging.h"
51 #include "boehm-gc/include/gc.h"
54 static bool in_gc_out_of_memory = false; /* is GC out of memory? */
59 __attribute__ ((unused))
61 *stackcall_twoargs(struct otherstackcall *p)
63 return (*p->p2)(p->p, p->l);
67 static void *stackcall_malloc(void *p, u4 bytelength)
69 return GC_MALLOC(bytelength);
73 static void *stackcall_malloc_atomic(void *p, u4 bytelength)
75 return GC_MALLOC_ATOMIC(bytelength);
79 static void *stackcall_malloc_uncollectable(void *p, u4 bytelength)
81 return GC_MALLOC_UNCOLLECTABLE(bytelength);
85 static void *stackcall_realloc(void *p, u4 bytelength)
87 return GC_REALLOC(p, bytelength);
90 static void *stackcall_free(void *p, u4 bytelength)
97 #if defined(USE_THREADS) && !defined(NATIVE_THREADS)
98 #define MAINTHREADCALL(r,m,pp,ll) \
99 if (currentThread == NULL || currentThread == mainThread) { \
102 struct otherstackcall sc; \
106 r = (*asm_switchstackandcall)(CONTEXT(mainThread).usedStackTop, \
108 (void**)&(CONTEXT(currentThread).usedStackTop), &sc); \
111 #define MAINTHREADCALL(r,m,pp,ll) \
116 void *heap_alloc_uncollectable(u4 bytelength)
119 MAINTHREADCALL(result, stackcall_malloc_uncollectable, NULL, bytelength);
124 void runboehmfinalizer(void *o, void *p)
126 java_objectheader *ob = (java_objectheader *) o;
128 asm_calljavafunction(ob->vftbl->class->finalizer, ob, NULL, NULL, NULL);
130 /* if we had an exception in the finalizer, ignore it */
131 *exceptionptr = NULL;
135 void *heap_allocate(u4 bytelength, bool references, methodinfo *finalizer)
140 MAINTHREADCALL(result, stackcall_malloc, NULL, bytelength);
143 MAINTHREADCALL(result, stackcall_malloc_atomic, NULL, bytelength);
151 GC_REGISTER_FINALIZER(result, runboehmfinalizer, 0, 0, 0);
157 void *heap_reallocate(void *p, u4 bytelength)
161 MAINTHREADCALL(result, stackcall_realloc, p, bytelength);
166 void heap_free(void *p)
170 MAINTHREADCALL(result, stackcall_free, p, 0);
173 static void gc_ignore_warnings(char *msg, GC_word arg)
177 void gc_init(u4 heapmaxsize, u4 heapstartsize)
179 size_t heapcurrentsize;
183 /* set the maximal heap size */
184 GC_set_max_heap_size(heapmaxsize);
186 /* set the initial heap size */
187 heapcurrentsize = GC_get_heap_size();
188 if (heapstartsize > heapcurrentsize) {
189 GC_expand_hp(heapstartsize - heapcurrentsize);
192 /* define OOM function */
193 GC_oom_fn = gc_out_of_memory;
195 /* suppress warnings */
196 GC_set_warn_proc(gc_ignore_warnings);
203 dolog("Garbage Collection: previous/now = %d / %d ",
210 s8 gc_get_heap_size()
212 return GC_get_heap_size();
216 s8 gc_get_free_bytes()
218 return GC_get_free_bytes();
222 s8 gc_get_max_heap_size()
224 return GC_get_max_heap_size();
228 void gc_invoke_finalizers()
230 GC_invoke_finalizers();
234 void gc_finalize_all()
240 /* gc_out_of_memory ************************************************************
242 This function is called when boehm detects that it is OOM.
244 *******************************************************************************/
246 void *gc_out_of_memory()
248 /* if this happens, we are REALLY out of memory */
250 if (in_gc_out_of_memory) {
251 /* this is all we can do... */
252 throw_cacao_exception_exit(string_java_lang_InternalError,
256 in_gc_out_of_memory = true;
258 /* try to release some memory */
262 /* now instantiate the exception */
264 *exceptionptr = new_exception(string_java_lang_OutOfMemoryError);
266 in_gc_out_of_memory = false;
273 * These are local overrides for various environment variables in Emacs.
274 * Please do not remove this and leave it at the end of the file, where
275 * Emacs will automagically detect them.
276 * ---------------------------------------------------------------------
279 * indent-tabs-mode: t