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"
45 #include "mm/memory.hpp"
47 #include "toolbox/logging.hpp"
49 #include "vm/jit/builtin.hpp"
50 #include "vm/exceptions.hpp"
51 #include "vm/finalizer.hpp"
52 #include "vm/global.h"
53 #include "vm/loader.hpp"
54 #include "vm/options.h"
55 #include "vm/rt-timing.h"
56 #include "vm/string.hpp"
60 /* global variables ***********************************************************/
62 static bool in_gc_out_of_memory = false; /* is GC out of memory? */
65 /* prototype static functions *************************************************/
67 static void gc_ignore_warnings(char *msg, GC_word arg);
70 /* gc_init *********************************************************************
72 Initializes the boehm garbage collector.
74 *******************************************************************************/
76 void gc_init(size_t heapmaxsize, size_t heapstartsize)
78 size_t heapcurrentsize;
80 TRACESUBSYSTEMINITIALIZATION("gc_init");
82 /* just to be sure (should be set to 1 by JAVA_FINALIZATION macro) */
84 GC_java_finalization = 1;
86 /* Ignore pointers that do not point to the start of an object. */
88 GC_all_interior_pointers = 0;
90 /* suppress warnings */
92 GC_set_warn_proc(gc_ignore_warnings);
94 /* install a GC notifier */
96 GC_finalize_on_demand = 1;
97 GC_finalizer_notifier = finalizer_notify;
99 /* define OOM function */
101 GC_oom_fn = gc_out_of_memory;
105 /* set the maximal heap size */
107 GC_set_max_heap_size(heapmaxsize);
109 /* set the initial heap size */
111 heapcurrentsize = GC_get_heap_size();
113 if (heapstartsize > heapcurrentsize)
114 GC_expand_hp(heapstartsize - heapcurrentsize);
118 static void gc_ignore_warnings(char *msg, GC_word arg)
123 void *heap_alloc_uncollectable(size_t size)
127 p = GC_MALLOC_UNCOLLECTABLE(size);
129 /* clear allocated memory region */
131 MSET(p, 0, uint8_t, size);
137 /* heap_alloc ******************************************************************
139 Allocates memory on the Java heap.
141 *******************************************************************************/
143 void *heap_alloc(size_t size, int references, methodinfo *finalizer, bool collect)
146 #if defined(ENABLE_RT_TIMING)
147 struct timespec time_start, time_end;
150 RT_TIMING_GET_TIME(time_start);
152 /* We can't use a bool here for references, as it's passed as a
153 bitmask in builtin_new. Thus we check for != 0. */
158 p = GC_MALLOC_ATOMIC(size);
163 if (finalizer != NULL)
164 GC_REGISTER_FINALIZER_NO_ORDER(p, finalizer_run, 0, 0, 0);
166 /* clear allocated memory region */
168 MSET(p, 0, uint8_t, size);
170 RT_TIMING_GET_TIME(time_end);
171 RT_TIMING_TIME_DIFF(time_start, time_end, RT_TIMING_GC_ALLOC);
177 void heap_free(void *p)
185 dolog("Garbage Collection: previous/now = %d / %d ",
192 int64_t gc_get_heap_size(void)
194 return GC_get_heap_size();
198 int64_t gc_get_free_bytes(void)
200 return GC_get_free_bytes();
204 /* gc_get_total_bytes **********************************************************
206 Returns the number of total bytes currently used on the Java heap.
208 *******************************************************************************/
210 int64_t gc_get_total_bytes(void)
212 return GC_get_total_bytes();
216 int64_t gc_get_max_heap_size(void)
218 return GC_get_max_heap_size();
222 void gc_invoke_finalizers(void)
224 GC_invoke_finalizers();
228 void gc_finalize_all(void)
234 /* gc_out_of_memory ************************************************************
236 This function is called when boehm detects that it is OOM.
238 *******************************************************************************/
240 void *gc_out_of_memory(size_t bytes_requested)
242 /* if this happens, we are REALLY out of memory */
244 if (in_gc_out_of_memory) {
245 /* this is all we can do... */
246 os::abort("gc_out_of_memory: out of memory");
249 in_gc_out_of_memory = true;
251 /* try to release some memory */
255 /* now instantiate the exception */
257 exceptions_throw_outofmemoryerror();
259 in_gc_out_of_memory = false;
266 * These are local overrides for various environment variables in Emacs.
267 * Please do not remove this and leave it at the end of the file, where
268 * Emacs will automagically detect them.
269 * ---------------------------------------------------------------------
272 * indent-tabs-mode: t
276 * vim:noexpandtab:sw=4:ts=4: