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/jit/builtin.hpp"
47 #include "vm/exceptions.hpp"
48 #include "vm/finalizer.h"
49 #include "vm/global.h"
50 #include "vm/loader.h"
51 #include "vm/options.h"
52 #include "vm/rt-timing.h"
53 #include "vm/string.hpp"
57 /* global variables ***********************************************************/
59 static bool in_gc_out_of_memory = false; /* is GC out of memory? */
62 /* prototype static functions *************************************************/
64 static void gc_ignore_warnings(char *msg, GC_word arg);
67 /* gc_init *********************************************************************
69 Initializes the boehm garbage collector.
71 *******************************************************************************/
73 void gc_init(size_t heapmaxsize, size_t heapstartsize)
75 size_t heapcurrentsize;
77 TRACESUBSYSTEMINITIALIZATION("gc_init");
79 /* just to be sure (should be set to 1 by JAVA_FINALIZATION macro) */
81 GC_java_finalization = 1;
83 /* Ignore pointers that do not point to the start of an object. */
85 GC_all_interior_pointers = 0;
87 /* suppress warnings */
89 GC_set_warn_proc(gc_ignore_warnings);
91 /* install a GC notifier */
93 GC_finalize_on_demand = 1;
94 GC_finalizer_notifier = finalizer_notify;
96 /* define OOM function */
98 GC_oom_fn = gc_out_of_memory;
102 /* set the maximal heap size */
104 GC_set_max_heap_size(heapmaxsize);
106 /* set the initial heap size */
108 heapcurrentsize = GC_get_heap_size();
110 if (heapstartsize > heapcurrentsize)
111 GC_expand_hp(heapstartsize - heapcurrentsize);
115 static void gc_ignore_warnings(char *msg, GC_word arg)
120 void *heap_alloc_uncollectable(size_t size)
124 p = GC_MALLOC_UNCOLLECTABLE(size);
126 /* clear allocated memory region */
128 MSET(p, 0, uint8_t, size);
134 /* heap_alloc ******************************************************************
136 Allocates memory on the Java heap.
138 *******************************************************************************/
140 void *heap_alloc(size_t size, int references, methodinfo *finalizer, bool collect)
143 #if defined(ENABLE_RT_TIMING)
144 struct timespec time_start, time_end;
147 RT_TIMING_GET_TIME(time_start);
149 /* We can't use a bool here for references, as it's passed as a
150 bitmask in builtin_new. Thus we check for != 0. */
155 p = GC_MALLOC_ATOMIC(size);
160 if (finalizer != NULL)
161 GC_REGISTER_FINALIZER_NO_ORDER(p, finalizer_run, 0, 0, 0);
163 /* clear allocated memory region */
165 MSET(p, 0, uint8_t, size);
167 RT_TIMING_GET_TIME(time_end);
168 RT_TIMING_TIME_DIFF(time_start, time_end, RT_TIMING_GC_ALLOC);
174 void heap_free(void *p)
182 dolog("Garbage Collection: previous/now = %d / %d ",
189 int64_t gc_get_heap_size(void)
191 return GC_get_heap_size();
195 int64_t gc_get_free_bytes(void)
197 return GC_get_free_bytes();
201 /* gc_get_total_bytes **********************************************************
203 Returns the number of total bytes currently used on the Java heap.
205 *******************************************************************************/
207 int64_t gc_get_total_bytes(void)
209 return GC_get_total_bytes();
213 int64_t gc_get_max_heap_size(void)
215 return GC_get_max_heap_size();
219 void gc_invoke_finalizers(void)
221 GC_invoke_finalizers();
225 void gc_finalize_all(void)
231 /* gc_out_of_memory ************************************************************
233 This function is called when boehm detects that it is OOM.
235 *******************************************************************************/
237 void *gc_out_of_memory(size_t bytes_requested)
239 /* if this happens, we are REALLY out of memory */
241 if (in_gc_out_of_memory) {
242 /* this is all we can do... */
243 VM::get_current()->abort("gc_out_of_memory: out of memory");
246 in_gc_out_of_memory = true;
248 /* try to release some memory */
252 /* now instantiate the exception */
254 exceptions_throw_outofmemoryerror();
256 in_gc_out_of_memory = false;
263 * These are local overrides for various environment variables in Emacs.
264 * Please do not remove this and leave it at the end of the file, where
265 * Emacs will automagically detect them.
266 * ---------------------------------------------------------------------
269 * indent-tabs-mode: t