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 1144 2004-06-05 23:53:56Z twisti $
33 #if defined(USE_THREADS) && defined(NATIVE_THREADS) && defined(__LINUX__)
34 #define GC_LINUX_THREADS
43 #include "threads/thread.h"
44 #include "toolbox/logging.h"
45 #include "boehm-gc/include/gc.h"
48 static bool in_gc_out_of_memory = false; /* is GC out of memory? */
51 static void *stackcall_twoargs(struct otherstackcall *p)
53 return (*p->p2)(p->p, p->l);
57 static void *stackcall_malloc(void *p, u4 bytelength)
59 return GC_MALLOC(bytelength);
63 static void *stackcall_malloc_atomic(void *p, u4 bytelength)
65 return GC_MALLOC_ATOMIC(bytelength);
69 static void *stackcall_malloc_uncollectable(void *p, u4 bytelength)
71 return GC_MALLOC_UNCOLLECTABLE(bytelength);
75 static void *stackcall_realloc(void *p, u4 bytelength)
77 return GC_REALLOC(p, bytelength);
80 static void *stackcall_free(void *p, u4 bytelength)
87 #if defined(USE_THREADS) && !defined(NATIVE_THREADS)
88 #define MAINTHREADCALL(r,m,pp,ll) \
89 if (currentThread == NULL || currentThread == mainThread) { \
92 struct otherstackcall sc; \
96 r = (*asm_switchstackandcall)(CONTEXT(mainThread).usedStackTop, \
98 (void**)&(CONTEXT(currentThread).usedStackTop), &sc); \
101 #define MAINTHREADCALL(r,m,pp,ll) \
106 void *heap_alloc_uncollectable(u4 bytelength)
109 MAINTHREADCALL(result, stackcall_malloc_uncollectable, NULL, bytelength);
114 void runboehmfinalizer(void *o, void *p)
116 java_objectheader *ob = (java_objectheader *) o;
118 asm_calljavafunction(ob->vftbl->class->finalizer, ob, NULL, NULL, NULL);
120 /* if we had an exception in the finalizer, ignore it */
121 *exceptionptr = NULL;
125 void *heap_allocate(u4 bytelength, bool references, methodinfo *finalizer)
130 MAINTHREADCALL(result, stackcall_malloc, NULL, bytelength);
133 MAINTHREADCALL(result, stackcall_malloc_atomic, NULL, bytelength);
141 GC_REGISTER_FINALIZER(result, runboehmfinalizer, 0, 0, 0);
147 void *heap_reallocate(void *p, u4 bytelength)
151 MAINTHREADCALL(result, stackcall_realloc, p, bytelength);
156 void heap_free(void *p)
160 MAINTHREADCALL(result, stackcall_free, p, 0);
164 void gc_init(u4 heapmaxsize, u4 heapstartsize)
166 size_t heapcurrentsize;
170 /* set the maximal heap size */
171 GC_set_max_heap_size(heapmaxsize);
173 /* set the initial heap size */
174 heapcurrentsize = GC_get_heap_size();
175 if (heapstartsize > heapcurrentsize) {
176 GC_expand_hp(heapstartsize - heapcurrentsize);
179 /* define OOM function */
180 GC_oom_fn = gc_out_of_memory;
187 dolog("Garbage Collection: previous/now = %d / %d ",
194 s8 gc_get_heap_size()
196 return GC_get_heap_size();
200 s8 gc_get_free_bytes()
202 return GC_get_free_bytes();
206 s8 gc_get_max_heap_size()
208 return GC_get_max_heap_size();
212 void gc_invoke_finalizers()
214 GC_invoke_finalizers();
218 void gc_finalize_all()
224 /* gc_out_of_memory ************************************************************
226 This function is called when boehm detects that it is OOM.
228 *******************************************************************************/
230 void *gc_out_of_memory()
232 /* if this happens, we are REALLY out of memory */
234 if (in_gc_out_of_memory) {
235 /* this is all we can do... */
236 throw_cacao_exception_exit(string_java_lang_InternalError,
240 in_gc_out_of_memory = true;
242 /* try to release some memory */
246 /* now instantiate the exception */
248 *exceptionptr = new_exception(string_java_lang_OutOfMemoryError);
250 in_gc_out_of_memory = false;
257 * These are local overrides for various environment variables in Emacs.
258 * Please do not remove this and leave it at the end of the file, where
259 * Emacs will automagically detect them.
260 * ---------------------------------------------------------------------
263 * indent-tabs-mode: t