1 /* src/mm/gc-boehm.cpp - interface for boehm gc
3 Copyright (C) 1996-2005, 2006, 2007, 2008, 2010
4 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
6 This file is part of CACAO.
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 2, or (at
11 your option) any later version.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
30 #if defined(ENABLE_THREADS) && defined(__LINUX__)
31 #define GC_LINUX_THREADS
33 #if defined(ENABLE_THREADS) && defined(__IRIX__)
34 #define GC_IRIX_THREADS
36 #if defined(ENABLE_THREADS) && defined(__DARWIN__)
37 #define GC_DARWIN_THREADS
39 #if defined(ENABLE_THREADS) && defined(__SOLARIS__)
40 #define GC_SOLARIS_THREADS
43 #include "boehm-gc/include/gc.h"
44 #include "boehm-gc/include/javaxfc.h"
46 #include "mm/memory.hpp"
48 #include "toolbox/logging.hpp"
50 #include "vm/jit/builtin.hpp"
51 #include "vm/exceptions.hpp"
52 #include "vm/finalizer.hpp"
53 #include "vm/global.h"
54 #include "vm/loader.hpp"
55 #include "vm/options.h"
56 #include "vm/rt-timing.h"
57 #include "vm/string.hpp"
61 /* global variables ***********************************************************/
63 static bool in_gc_out_of_memory = false; /* is GC out of memory? */
64 static size_t gc_max_heap_size = 0;
67 /* prototype static functions *************************************************/
69 static void gc_ignore_warnings(char *msg, GC_word arg);
72 /* gc_init *********************************************************************
74 Initializes the boehm garbage collector.
76 *******************************************************************************/
78 void gc_init(size_t heapmaxsize, size_t heapstartsize)
80 size_t heapcurrentsize;
82 TRACESUBSYSTEMINITIALIZATION("gc_init");
84 /* just to be sure (should be set to 1 by JAVA_FINALIZATION macro) */
86 GC_java_finalization = 1;
88 /* Ignore pointers that do not point to the start of an object. */
90 GC_all_interior_pointers = 0;
92 /* suppress warnings */
94 GC_set_warn_proc(gc_ignore_warnings);
96 /* install a GC notifier */
98 GC_finalize_on_demand = 1;
99 GC_finalizer_notifier = finalizer_notify;
101 /* define OOM function */
103 GC_oom_fn = gc_out_of_memory;
107 /* set the maximal heap size */
109 GC_set_max_heap_size(heapmaxsize);
110 gc_max_heap_size = heapmaxsize;
112 /* set the initial heap size */
114 heapcurrentsize = GC_get_heap_size();
116 if (heapstartsize > heapcurrentsize)
117 GC_expand_hp(heapstartsize - heapcurrentsize);
121 static void gc_ignore_warnings(char *msg, GC_word arg)
126 void *heap_alloc_uncollectable(size_t size)
130 p = GC_MALLOC_UNCOLLECTABLE(size);
132 /* clear allocated memory region */
134 MSET(p, 0, uint8_t, size);
140 /* heap_alloc ******************************************************************
142 Allocates memory on the Java heap.
144 *******************************************************************************/
146 void *heap_alloc(size_t size, int references, methodinfo *finalizer, bool collect)
149 #if defined(ENABLE_RT_TIMING)
150 struct timespec time_start, time_end;
153 RT_TIMING_GET_TIME(time_start);
155 /* We can't use a bool here for references, as it's passed as a
156 bitmask in builtin_new. Thus we check for != 0. */
161 p = GC_MALLOC_ATOMIC(size);
166 if (finalizer != NULL)
167 GC_REGISTER_FINALIZER_NO_ORDER(p, finalizer_run, 0, 0, 0);
169 /* clear allocated memory region */
171 MSET(p, 0, uint8_t, size);
173 RT_TIMING_GET_TIME(time_end);
174 RT_TIMING_TIME_DIFF(time_start, time_end, RT_TIMING_GC_ALLOC);
180 void heap_free(void *p)
188 dolog("Garbage Collection: previous/now = %d / %d ",
195 int64_t gc_get_heap_size(void)
197 return GC_get_heap_size();
201 int64_t gc_get_free_bytes(void)
203 return GC_get_free_bytes();
207 /* gc_get_total_bytes **********************************************************
209 Returns the number of total bytes currently used on the Java heap.
211 *******************************************************************************/
213 int64_t gc_get_total_bytes(void)
215 return GC_get_total_bytes();
219 int64_t gc_get_max_heap_size(void)
221 return gc_max_heap_size;
225 void gc_invoke_finalizers(void)
227 GC_invoke_finalizers();
231 void gc_finalize_all(void)
237 /* gc_out_of_memory ************************************************************
239 This function is called when boehm detects that it is OOM.
241 *******************************************************************************/
243 void *gc_out_of_memory(size_t bytes_requested)
245 /* if this happens, we are REALLY out of memory */
247 if (in_gc_out_of_memory) {
248 /* this is all we can do... */
249 os::abort("gc_out_of_memory: out of memory");
252 in_gc_out_of_memory = true;
254 /* try to release some memory */
258 /* now instantiate the exception */
260 exceptions_throw_outofmemoryerror();
262 in_gc_out_of_memory = false;
269 * These are local overrides for various environment variables in Emacs.
270 * Please do not remove this and leave it at the end of the file, where
271 * Emacs will automagically detect them.
272 * ---------------------------------------------------------------------
275 * indent-tabs-mode: t
279 * vim:noexpandtab:sw=4:ts=4: