-/* boehm.c *********************************************************************
+/* src/mm/boehm.c - interface for boehm gc
- Copyright (c) 1997 A. Krall, R. Grafl, M. Gschwind, M. Probst
+ Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
+ C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
+ E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
+ J. Wenninger, Institut f. Computersprachen - TU Wien
- See file COPYRIGHT for information on usage and disclaimer of warranties
+ This file is part of CACAO.
- Contains the interface to the Boehm GC
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
- Authors: Reinhard Grafl EMAIL: cacao@complang.tuwien.ac.at
- Changes: Andi Krall EMAIL: cacao@complang.tuwien.ac.at
- Mark Probst EMAIL: cacao@complang.tuwien.ac.at
- Philipp Tomsich EMAIL: cacao@complang.tuwien.ac.at
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
- Last Change: $Id: boehm.c 211 2003-02-03 13:06:27Z stefan $
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
-*******************************************************************************/
+*/
-#include "global.h"
-#include "threads/thread.h"
-#include "gc.h"
+#include "config.h"
+#include "vm/types.h"
-void *asm_switchstackandcall (void *stack, void *func, void **stacktopsave, void *);
+#if defined(ENABLE_THREADS) && defined(__LINUX__)
+#define GC_LINUX_THREADS
+#endif
+#if defined(ENABLE_THREADS) && defined(__IRIX__)
+#define GC_IRIX_THREADS
+#endif
-struct otherstackcall;
+#include "boehm-gc/include/gc.h"
+#include "mm/gc-common.h"
+#include "mm/memory.h"
-typedef void *(*calltwoargs)(void *, u4);
+#include "toolbox/logging.h"
-struct otherstackcall {
- calltwoargs p2;
- void *p;
- u4 l;
-};
+#include "vm/builtin.h"
+#include "vm/exceptions.h"
+#include "vm/finalizer.h"
+#include "vm/global.h"
+#include "vm/stringlocal.h"
+#include "vm/vm.h"
+
+#include "vmcore/loader.h"
+#include "vmcore/options.h"
+
+
+/* global variables ***********************************************************/
+
+static bool in_gc_out_of_memory = false; /* is GC out of memory? */
+
+
+/* prototype static functions *************************************************/
+
+static void gc_ignore_warnings(char *msg, GC_word arg);
+
+
+/* gc_init *********************************************************************
-static void *stackcall_twoargs(struct otherstackcall *p)
+ Initializes the boehm garbage collector.
+
+*******************************************************************************/
+
+void gc_init(u4 heapmaxsize, u4 heapstartsize)
{
- return (*p->p2)(p->p, p->l);
+ size_t heapcurrentsize;
+
+ /* just to be sure (should be set to 1 by JAVA_FINALIZATION macro) */
+
+ GC_java_finalization = 1;
+
+ /* Ignore pointers that do not point to the start of an object. */
+
+ GC_all_interior_pointers = 0;
+
+ /* suppress warnings */
+
+ GC_set_warn_proc(gc_ignore_warnings);
+
+ /* install a GC notifier */
+
+ GC_finalize_on_demand = 1;
+ GC_finalizer_notifier = finalizer_notify;
+
+ /* define OOM function */
+
+ GC_oom_fn = gc_out_of_memory;
+
+ GC_INIT();
+
+ /* set the maximal heap size */
+
+ GC_set_max_heap_size(heapmaxsize);
+
+ /* set the initial heap size */
+
+ heapcurrentsize = GC_get_heap_size();
+
+ if (heapstartsize > heapcurrentsize)
+ GC_expand_hp(heapstartsize - heapcurrentsize);
}
-static void *stackcall_malloc(void *p, u4 bytelength)
+
+static void gc_ignore_warnings(char *msg, GC_word arg)
{
- return GC_MALLOC(bytelength);
}
-static void *stackcall_malloc_atomic(void *p, u4 bytelength)
+
+void *heap_alloc_uncollectable(u4 bytelength)
{
- return GC_MALLOC_ATOMIC(bytelength);
+ void *p;
+
+ p = GC_MALLOC_UNCOLLECTABLE(bytelength);
+
+ /* clear allocated memory region */
+
+ MSET(p, 0, u1, bytelength);
+
+ return p;
}
-static void *stackcall_malloc_uncollectable(void *p, u4 bytelength)
+
+/* heap_allocate ***************************************************************
+
+ Allocates memory on the Java heap.
+
+*******************************************************************************/
+
+void *heap_allocate(u4 bytelength, u4 references, methodinfo *finalizer)
{
- return GC_MALLOC_UNCOLLECTABLE(bytelength);
+ void *p;
+
+ /* We can't use a bool here for references, as it's passed as a
+ bitmask in builtin_new. Thus we check for != 0. */
+
+ if (references != 0)
+ p = GC_MALLOC(bytelength);
+ else
+ p = GC_MALLOC_ATOMIC(bytelength);
+
+ if (p == NULL)
+ return NULL;
+
+ if (finalizer != NULL)
+ GC_REGISTER_FINALIZER_NO_ORDER(p, finalizer_run, 0, 0, 0);
+
+ /* clear allocated memory region */
+
+ MSET(p, 0, u1, bytelength);
+
+ return p;
}
-static void *stackcall_realloc(void *p, u4 bytelength)
+
+void heap_free(void *p)
{
- return GC_REALLOC(p, bytelength);
+ GC_FREE(p);
}
-#define MAINTHREADCALL(r,m,pp,ll) \
- if (currentThread == NULL || currentThread == mainThread) { \
- r = m(pp, ll); \
- } else { \
- struct otherstackcall sc; \
- sc.p2 = m; \
- sc.p = pp; \
- sc.l = ll; \
- r = (*asm_switchstackandcall)(CONTEXT(mainThread).usedStackTop, \
- stackcall_twoargs, \
- (void**)&(CONTEXT(currentThread).usedStackTop), &sc); \
- }
-
-void *heap_alloc_uncollectable(u4 bytelength)
+void gc_call(void)
{
- void *result;
- MAINTHREADCALL(result, stackcall_malloc_uncollectable, NULL, bytelength);
- return result;
+ if (opt_verbosegc)
+ dolog("Garbage Collection: previous/now = %d / %d ",
+ 0, 0);
+
+ GC_gcollect();
}
-void *heap_allocate (u4 bytelength, bool references, methodinfo *finalizer)
+
+s8 gc_get_heap_size(void)
{
- void *result;
- if (references, 1)
- { MAINTHREADCALL(result, stackcall_malloc, NULL, bytelength); }
- else
- { MAINTHREADCALL(result, stackcall_malloc_atomic, NULL, bytelength); }
- return (u1*) result;
+ return GC_get_heap_size();
}
-void *heap_reallocate(void *p, u4 bytelength)
+
+s8 gc_get_free_bytes(void)
{
- void *result;
- MAINTHREADCALL(result, stackcall_realloc, p, bytelength);
- return result;
+ return GC_get_free_bytes();
}
-void heap_init (u4 size, u4 startsize, void **stackbottom)
+
+/* gc_get_total_bytes **********************************************************
+
+ Returns the number of total bytes currently used on the Java heap.
+
+*******************************************************************************/
+
+s8 gc_get_total_bytes(void)
{
+ return GC_get_total_bytes();
}
-void heap_close()
+
+s8 gc_get_max_heap_size(void)
{
+ return GC_get_max_heap_size();
}
-void heap_addreference (void **reflocation)
+
+void gc_invoke_finalizers(void)
{
+ GC_invoke_finalizers();
}
-int collectverbose;
-void gc_init()
+void gc_finalize_all(void)
{
+ GC_finalize_all();
}
-void gc_call()
+
+/* gc_out_of_memory ************************************************************
+
+ This function is called when boehm detects that it is OOM.
+
+*******************************************************************************/
+
+void *gc_out_of_memory(size_t bytes_requested)
{
- GC_gcollect();
+ /* if this happens, we are REALLY out of memory */
+
+ if (in_gc_out_of_memory) {
+ /* this is all we can do... */
+ vm_abort("gc_out_of_memory: out of memory");
+ }
+
+ in_gc_out_of_memory = true;
+
+ /* try to release some memory */
+
+ gc_call();
+
+ /* now instantiate the exception */
+
+ exceptions_throw_outofmemoryerror();
+
+ in_gc_out_of_memory = false;
+
+ return NULL;
}
+
/*
* These are local overrides for various environment variables in Emacs.
* Please do not remove this and leave it at the end of the file, where
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