1 /* src/mm/gc-boehm.cpp - interface for boehm gc
3 Copyright (C) 1996-2005, 2006, 2007, 2008
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
40 #include "boehm-gc/include/gc.h"
42 #include "mm/memory.h"
44 #include "toolbox/logging.h"
46 #include "vm/builtin.h"
47 #include "vm/exceptions.hpp"
48 #include "vm/finalizer.h"
49 #include "vm/global.h"
50 #include "vm/string.hpp"
53 #include "vmcore/loader.h"
54 #include "vmcore/options.h"
55 #include "vmcore/rt-timing.h"
58 /* global variables ***********************************************************/
60 static bool in_gc_out_of_memory = false; /* is GC out of memory? */
63 /* prototype static functions *************************************************/
65 static void gc_ignore_warnings(char *msg, GC_word arg);
68 /* gc_init *********************************************************************
70 Initializes the boehm garbage collector.
72 *******************************************************************************/
74 void gc_init(size_t heapmaxsize, size_t heapstartsize)
76 size_t heapcurrentsize;
78 TRACESUBSYSTEMINITIALIZATION("gc_init");
80 /* just to be sure (should be set to 1 by JAVA_FINALIZATION macro) */
82 GC_java_finalization = 1;
84 /* Ignore pointers that do not point to the start of an object. */
86 GC_all_interior_pointers = 0;
88 /* suppress warnings */
90 GC_set_warn_proc(gc_ignore_warnings);
92 /* install a GC notifier */
94 GC_finalize_on_demand = 1;
95 GC_finalizer_notifier = finalizer_notify;
97 /* define OOM function */
99 GC_oom_fn = gc_out_of_memory;
103 /* set the maximal heap size */
105 GC_set_max_heap_size(heapmaxsize);
107 /* set the initial heap size */
109 heapcurrentsize = GC_get_heap_size();
111 if (heapstartsize > heapcurrentsize)
112 GC_expand_hp(heapstartsize - heapcurrentsize);
116 static void gc_ignore_warnings(char *msg, GC_word arg)
121 void *heap_alloc_uncollectable(size_t size)
125 p = GC_MALLOC_UNCOLLECTABLE(size);
127 /* clear allocated memory region */
129 MSET(p, 0, uint8_t, size);
135 /* heap_alloc ******************************************************************
137 Allocates memory on the Java heap.
139 *******************************************************************************/
141 void *heap_alloc(size_t size, int references, methodinfo *finalizer, bool collect)
144 #if defined(ENABLE_RT_TIMING)
145 struct timespec time_start, time_end;
148 RT_TIMING_GET_TIME(time_start);
150 /* We can't use a bool here for references, as it's passed as a
151 bitmask in builtin_new. Thus we check for != 0. */
156 p = GC_MALLOC_ATOMIC(size);
161 if (finalizer != NULL)
162 GC_REGISTER_FINALIZER_NO_ORDER(p, finalizer_run, 0, 0, 0);
164 /* clear allocated memory region */
166 MSET(p, 0, uint8_t, size);
168 RT_TIMING_GET_TIME(time_end);
169 RT_TIMING_TIME_DIFF(time_start, time_end, RT_TIMING_GC_ALLOC);
175 void heap_free(void *p)
183 dolog("Garbage Collection: previous/now = %d / %d ",
190 int64_t gc_get_heap_size(void)
192 return GC_get_heap_size();
196 int64_t gc_get_free_bytes(void)
198 return GC_get_free_bytes();
202 /* gc_get_total_bytes **********************************************************
204 Returns the number of total bytes currently used on the Java heap.
206 *******************************************************************************/
208 int64_t gc_get_total_bytes(void)
210 return GC_get_total_bytes();
214 int64_t gc_get_max_heap_size(void)
216 return GC_get_max_heap_size();
220 void gc_invoke_finalizers(void)
222 GC_invoke_finalizers();
226 void gc_finalize_all(void)
232 /* gc_out_of_memory ************************************************************
234 This function is called when boehm detects that it is OOM.
236 *******************************************************************************/
238 void *gc_out_of_memory(size_t bytes_requested)
240 /* if this happens, we are REALLY out of memory */
242 if (in_gc_out_of_memory) {
243 /* this is all we can do... */
244 vm_abort("gc_out_of_memory: out of memory");
247 in_gc_out_of_memory = true;
249 /* try to release some memory */
253 /* now instantiate the exception */
255 exceptions_throw_outofmemoryerror();
257 in_gc_out_of_memory = false;
264 * These are local overrides for various environment variables in Emacs.
265 * Please do not remove this and leave it at the end of the file, where
266 * Emacs will automagically detect them.
267 * ---------------------------------------------------------------------
270 * indent-tabs-mode: t