#include <string.h>
#include <mono/metadata/gc-internal.h>
+#include <mono/metadata/mono-gc.h>
#include <mono/metadata/threads.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/exception.h>
+#include <mono/metadata/profiler-private.h>
#include <mono/metadata/domain-internals.h>
#include <mono/metadata/class-internals.h>
#include <mono/utils/mono-logger.h>
-#define GC_I_HIDE_POINTERS
#include <mono/os/gc_wrapper.h>
-
-#ifndef HIDE_POINTER
-#define HIDE_POINTER(v) (v)
-#define REVEAL_POINTER(v) (v)
-#endif
+#include <mono/metadata/marshal.h> /* for mono_delegate_free_ftnptr () */
typedef struct DomainFinalizationReq {
MonoDomain *domain;
#define GC_finalize_on_demand __imp_GC_finalize_on_demand
#endif
-static int finalize_slot = -1;
-
static gboolean gc_disabled = FALSE;
+#define mono_finalizer_lock() EnterCriticalSection (&finalizer_mutex)
+#define mono_finalizer_unlock() LeaveCriticalSection (&finalizer_mutex)
static CRITICAL_SECTION finalizer_mutex;
static GSList *domains_to_finalize= NULL;
static void object_register_finalizer (MonoObject *obj, void (*callback)(void *, void*));
-#if HAVE_BOEHM_GC
-static void finalize_notify (void);
+#ifndef HAVE_NULL_GC
static HANDLE pending_done_event;
static HANDLE shutdown_event;
static HANDLE thread_started_event;
MonoObject *o, *o2;
o = (MonoObject*)((char*)obj + GPOINTER_TO_UINT (data));
- if (finalize_slot < 0) {
- int i;
- MonoClass* obj_class = mono_get_object_class ();
- for (i = 0; i < obj_class->vtable_size; ++i) {
- MonoMethod *cm = obj_class->vtable [i];
-
- if (!strcmp (mono_method_get_name (cm), "Finalize")) {
- finalize_slot = i;
- break;
- }
- }
- }
-
+#ifndef HAVE_SGEN_GC
mono_domain_lock (o->vtable->domain);
o2 = g_hash_table_lookup (o->vtable->domain->finalizable_objects_hash, o);
if (!o2)
/* Already finalized somehow */
return;
+#endif
/* make sure the finalizer is not called again if the object is resurrected */
object_register_finalizer (obj, NULL);
/* Use _internal here, since this thread can enter a doomed appdomain */
mono_domain_set_internal (mono_object_domain (o));
- mono_runtime_invoke (o->vtable->klass->vtable [finalize_slot], o, NULL, &exc);
+ /* delegates that have a native function pointer allocated are
+ * registered for finalization, but they don't have a Finalize
+ * method, because in most cases it's not needed and it's just a waste.
+ */
+ if (o->vtable->klass->delegate) {
+ MonoDelegate* del = (MonoDelegate*)o;
+ if (del->delegate_trampoline)
+ mono_delegate_free_ftnptr ((MonoDelegate*)o);
+ return;
+ }
+
+ mono_runtime_invoke (mono_class_get_finalizer (o->vtable->klass), o, NULL, &exc);
if (exc) {
/* fixme: do something useful */
}
}
+gpointer
+mono_gc_out_of_memory (size_t size)
+{
+ /*
+ * we could allocate at program startup some memory that we could release
+ * back to the system at this point if we're really low on memory (ie, size is
+ * lower than the memory we set apart)
+ */
+ mono_raise_exception (mono_domain_get ()->out_of_memory_ex);
+
+ return NULL;
+}
+
/*
* Some of our objects may point to a different address than the address returned by GC_malloc()
* (because of the GetHashCode hack), but we need to pass the real address to register_finalizer.
mono_domain_unlock (obj->vtable->domain);
GC_REGISTER_FINALIZER_NO_ORDER ((char*)obj - offset, callback, GUINT_TO_POINTER (offset), NULL, NULL);
+#elif defined(HAVE_SGEN_GC)
+ mono_gc_register_for_finalization (obj, callback);
#endif
}
+/**
+ * mono_object_register_finalizer:
+ * @obj: object to register
+ *
+ * Records that object @obj has a finalizer, this will call the
+ * Finalize method when the garbage collector disposes the object.
+ *
+ */
void
mono_object_register_finalizer (MonoObject *obj)
{
object_register_finalizer (obj, run_finalize);
}
-/*
+/**
* mono_domain_finalize:
+ * @domain: the domain to finalize
+ * @timeout: msects to wait for the finalization to complete
*
* Request finalization of all finalizable objects inside @domain. Wait
* @timeout msecs for the finalization to complete.
+ *
* Returns: TRUE if succeeded, FALSE if there was a timeout
*/
guint32 res;
HANDLE done_event;
+ if (mono_thread_current () == gc_thread)
+ /* We are called from inside a finalizer, not much we can do here */
+ return FALSE;
+
+ mono_profiler_appdomain_event (domain, MONO_PROFILE_START_UNLOAD);
+
/*
* No need to create another thread 'cause the finalizer thread
* is still working and will take care of running the finalizers
*/
-#if HAVE_BOEHM_GC
+#ifndef HAVE_NULL_GC
if (gc_disabled)
return TRUE;
- GC_gcollect ();
+ mono_gc_collect (mono_gc_max_generation ());
done_event = CreateEvent (NULL, TRUE, FALSE, NULL);
req->domain = domain;
req->done_event = done_event;
- EnterCriticalSection (&finalizer_mutex);
+ mono_finalizer_lock ();
domains_to_finalize = g_slist_append (domains_to_finalize, req);
- LeaveCriticalSection (&finalizer_mutex);
+ mono_finalizer_unlock ();
/* Tell the finalizer thread to finalize this appdomain */
- finalize_notify ();
+ mono_gc_finalize_notify ();
res = WaitForSingleObjectEx (done_event, timeout, TRUE);
void
ves_icall_System_GC_InternalCollect (int generation)
{
- MONO_ARCH_SAVE_REGS;
-
-#if HAVE_BOEHM_GC
- GC_gcollect ();
-#endif
+ mono_gc_collect (generation);
}
gint64
{
MONO_ARCH_SAVE_REGS;
-#if HAVE_BOEHM_GC
if (forceCollection)
- GC_gcollect ();
- return GC_get_heap_size () - GC_get_free_bytes ();
-#else
- return 0;
-#endif
+ mono_gc_collect (mono_gc_max_generation ());
+ return mono_gc_get_used_size ();
}
void
{
MONO_ARCH_SAVE_REGS;
+ /* delegates have no finalizers, but we register them to deal with the
+ * unmanaged->managed trampoline. We don't let the user suppress it
+ * otherwise we'd leak it.
+ */
+ if (obj->vtable->klass->delegate)
+ return;
+
object_register_finalizer (obj, NULL);
}
{
MONO_ARCH_SAVE_REGS;
-#if HAVE_BOEHM_GC
- if (!GC_should_invoke_finalizers ())
+#ifndef HAVE_NULL_GC
+ if (!mono_gc_pending_finalizers ())
return;
if (mono_thread_current () == gc_thread)
return;
ResetEvent (pending_done_event);
- finalize_notify ();
+ mono_gc_finalize_notify ();
/* g_print ("Waiting for pending finalizers....\n"); */
WaitForSingleObjectEx (pending_done_event, INFINITE, TRUE);
/* g_print ("Done pending....\n"); */
#else
#endif
}
-
+#define mono_allocator_lock() EnterCriticalSection (&allocator_section)
+#define mono_allocator_unlock() LeaveCriticalSection (&allocator_section)
static CRITICAL_SECTION allocator_section;
static CRITICAL_SECTION handle_section;
-static guint32 next_handle = 0;
-static gpointer *gc_handles = NULL;
-static guint8 *gc_handle_types = NULL;
-static guint32 array_size = 0;
-
-/*
- * The handle type is encoded in the lower two bits of the handle value:
- * 0 -> normal
- * 1 -> pinned
- * 2 -> weak
- */
typedef enum {
HANDLE_WEAK,
HANDLE_PINNED
} HandleType;
-/*
- * FIXME: make thread safe and reuse the array entries.
- */
+static void mono_gchandle_set_target (guint32 gchandle, MonoObject *obj);
+
MonoObject *
ves_icall_System_GCHandle_GetTarget (guint32 handle)
{
- MonoObject *obj;
- gint32 type;
-
- MONO_ARCH_SAVE_REGS;
-
- if (gc_handles) {
- type = handle & 0x3;
- EnterCriticalSection (&handle_section);
- g_assert (type == gc_handle_types [handle >> 2]);
- obj = gc_handles [handle >> 2];
- LeaveCriticalSection (&handle_section);
- if (!obj)
- return NULL;
-
- if ((type == HANDLE_WEAK) || (type == HANDLE_WEAK_TRACK))
- return REVEAL_POINTER (obj);
- else
- return obj;
- }
- return NULL;
+ return mono_gchandle_get_target (handle);
}
+/*
+ * if type == -1, change the target of the handle, otherwise allocate a new handle.
+ */
guint32
ves_icall_System_GCHandle_GetTargetHandle (MonoObject *obj, guint32 handle, gint32 type)
{
- gpointer val = obj;
- guint32 h, idx;
-
- MONO_ARCH_SAVE_REGS;
-
- EnterCriticalSection (&handle_section);
- /* Indexes start from 1 since 0 means the handle is not allocated */
- idx = ++next_handle;
- if (idx >= array_size) {
- gpointer *new_array;
- guint8 *new_type_array;
- if (!array_size)
- array_size = 16;
-#if HAVE_BOEHM_GC
- new_array = GC_MALLOC (sizeof (gpointer) * (array_size * 2));
- new_type_array = GC_MALLOC (sizeof (guint8) * (array_size * 2));
-#else
- new_array = g_malloc0 (sizeof (gpointer) * (array_size * 2));
- new_type_array = g_malloc0 (sizeof (guint8) * (array_size * 2));
-#endif
- if (gc_handles) {
- int i;
- memcpy (new_array, gc_handles, sizeof (gpointer) * array_size);
- memcpy (new_type_array, gc_handle_types, sizeof (guint8) * array_size);
- /* need to re-register links for weak refs. test if GC_realloc needs the same */
- for (i = 0; i < array_size; ++i) {
-#if 0 /* This breaks the threaded finalizer, by causing segfaults deep
- * inside libgc. I assume it will also break without the
- * threaded finalizer, just that the stress test (bug 31333)
- * deadlocks too early without it. Reverting to the previous
- * version here stops the segfault.
- */
- if ((gc_handle_types[i] == HANDLE_WEAK) || (gc_handle_types[i] == HANDLE_WEAK_TRACK)) { /* all and only disguised pointers have it set */
-#else
- if (((gulong)new_array [i]) & 0x1) {
-#endif
-#if HAVE_BOEHM_GC
- if (gc_handles [i] != (gpointer)-1)
- GC_unregister_disappearing_link (&(gc_handles [i]));
- if (new_array [i] != (gpointer)-1)
- GC_GENERAL_REGISTER_DISAPPEARING_LINK (&(new_array [i]), REVEAL_POINTER (new_array [i]));
-#endif
- }
- }
- }
- array_size *= 2;
-#ifndef HAVE_BOEHM_GC
- g_free (gc_handles);
- g_free (gc_handle_types);
-#endif
- gc_handles = new_array;
- gc_handle_types = new_type_array;
+ if (type == -1) {
+ mono_gchandle_set_target (handle, obj);
+ /* the handle doesn't change */
+ return handle;
}
-
- /* resuse the type from the old target */
- if (type == -1)
- type = handle & 0x3;
- h = (idx << 2) | type;
switch (type) {
case HANDLE_WEAK:
+ return mono_gchandle_new_weakref (obj, FALSE);
case HANDLE_WEAK_TRACK:
- val = (gpointer)HIDE_POINTER (val);
- gc_handles [idx] = val;
- gc_handle_types [idx] = type;
-#if HAVE_BOEHM_GC
- if (gc_handles [idx] != (gpointer)-1)
- GC_GENERAL_REGISTER_DISAPPEARING_LINK (&(gc_handles [idx]), obj);
-#endif
- break;
+ return mono_gchandle_new_weakref (obj, TRUE);
+ case HANDLE_NORMAL:
+ return mono_gchandle_new (obj, FALSE);
+ case HANDLE_PINNED:
+ return mono_gchandle_new (obj, TRUE);
default:
- gc_handles [idx] = val;
- gc_handle_types [idx] = type;
- break;
+ g_assert_not_reached ();
}
- LeaveCriticalSection (&handle_section);
- return h;
+ return 0;
}
void
ves_icall_System_GCHandle_FreeHandle (guint32 handle)
{
- int idx = handle >> 2;
- int type = handle & 0x3;
-
- MONO_ARCH_SAVE_REGS;
-
- EnterCriticalSection (&handle_section);
-
-#ifdef HAVE_BOEHM_GC
- g_assert (type == gc_handle_types [idx]);
- if ((type == HANDLE_WEAK) || (type == HANDLE_WEAK_TRACK)) {
- if (gc_handles [idx] != (gpointer)-1)
- GC_unregister_disappearing_link (&(gc_handles [idx]));
- }
-#endif
-
- gc_handles [idx] = (gpointer)-1;
- gc_handle_types [idx] = (guint8)-1;
- LeaveCriticalSection (&handle_section);
+ mono_gchandle_free (handle);
}
gpointer
ves_icall_System_GCHandle_GetAddrOfPinnedObject (guint32 handle)
{
MonoObject *obj;
- int type = handle & 0x3;
- MONO_ARCH_SAVE_REGS;
+ obj = mono_gchandle_get_target (handle);
+ if (obj) {
+ MonoClass *klass = mono_object_class (obj);
+ if (klass == mono_defaults.string_class) {
+ return mono_string_chars ((MonoString*)obj);
+ } else if (klass->rank) {
+ return mono_array_addr ((MonoArray*)obj, char, 0);
+ } else {
+ /* the C# code will check and throw the exception */
+ /* FIXME: missing !klass->blittable test, see bug #61134 */
+ if ((klass->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) == TYPE_ATTRIBUTE_AUTO_LAYOUT)
+ return (gpointer)-1;
+ return (char*)obj + sizeof (MonoObject);
+ }
+ }
+ return NULL;
+}
+
+typedef struct {
+ guint32 *bitmap;
+ gpointer *entries;
+ guint32 size;
+ guint8 type;
+ guint slot_hint : 24; /* starting slot for search */
+ /* 2^16 appdomains should be enough for everyone (though I know I'll regret this in 20 years) */
+ /* we alloc this only for weak refs, since we can get the domain directly in the other cases */
+ guint16 *domain_ids;
+} HandleData;
+
+/* weak and weak-track arrays will be allocated in malloc memory
+ */
+static HandleData gc_handles [] = {
+ {NULL, NULL, 0, HANDLE_WEAK, 0},
+ {NULL, NULL, 0, HANDLE_WEAK_TRACK, 0},
+ {NULL, NULL, 0, HANDLE_NORMAL, 0},
+ {NULL, NULL, 0, HANDLE_PINNED, 0}
+};
- if (gc_handles) {
- EnterCriticalSection (&handle_section);
- obj = gc_handles [handle >> 2];
- g_assert (gc_handle_types [handle >> 2] == type);
- LeaveCriticalSection (&handle_section);
- if ((type == HANDLE_WEAK) || (type == HANDLE_WEAK_TRACK)) {
- obj = REVEAL_POINTER (obj);
- if (obj == (MonoObject *) -1)
- return NULL;
+#define lock_handles(handles) EnterCriticalSection (&handle_section)
+#define unlock_handles(handles) LeaveCriticalSection (&handle_section)
+
+static int
+find_first_unset (guint32 bitmap)
+{
+ int i;
+ for (i = 0; i < 32; ++i) {
+ if (!(bitmap & (1 << i)))
+ return i;
+ }
+ return -1;
+}
+
+static guint32
+alloc_handle (HandleData *handles, MonoObject *obj)
+{
+ gint slot, i;
+ lock_handles (handles);
+ if (!handles->size) {
+ handles->size = 32;
+ if (handles->type > HANDLE_WEAK_TRACK) {
+ handles->entries = mono_gc_alloc_fixed (sizeof (gpointer) * handles->size, NULL);
+ } else {
+ handles->entries = g_malloc0 (sizeof (gpointer) * handles->size);
+ handles->domain_ids = g_malloc0 (sizeof (guint16) * handles->size);
}
- if (obj) {
- MonoClass *klass = mono_object_class (obj);
- if (klass == mono_defaults.string_class) {
- return mono_string_chars ((MonoString*)obj);
- } else if (klass->rank) {
- return mono_array_addr ((MonoArray*)obj, char, 0);
- } else {
- /* the C# code will check and throw the exception */
- /* FIXME: missing !klass->blittable test, see bug #61134,
- * disabled in 1.0 untill the blittable-using code is audited.
- if ((klass->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) == TYPE_ATTRIBUTE_AUTO_LAYOUT)
- return (gpointer)-1; */
- return (char*)obj + sizeof (MonoObject);
+ handles->bitmap = g_malloc0 (handles->size / 8);
+ }
+ i = -1;
+ for (slot = handles->slot_hint; slot < handles->size / 32; ++slot) {
+ if (handles->bitmap [slot] != 0xffffffff) {
+ i = find_first_unset (handles->bitmap [slot]);
+ handles->slot_hint = slot;
+ break;
+ }
+ }
+ if (i == -1 && handles->slot_hint != 0) {
+ for (slot = 0; slot < handles->slot_hint; ++slot) {
+ if (handles->bitmap [slot] != 0xffffffff) {
+ i = find_first_unset (handles->bitmap [slot]);
+ handles->slot_hint = slot;
+ break;
}
}
}
- return NULL;
+ if (i == -1) {
+ guint32 *new_bitmap;
+ guint32 new_size = handles->size * 2; /* always double: we memset to 0 based on this below */
+
+ /* resize and copy the bitmap */
+ new_bitmap = g_malloc0 (new_size / 8);
+ memcpy (new_bitmap, handles->bitmap, handles->size / 8);
+ g_free (handles->bitmap);
+ handles->bitmap = new_bitmap;
+
+ /* resize and copy the entries */
+ if (handles->type > HANDLE_WEAK_TRACK) {
+ gpointer *entries;
+ entries = mono_gc_alloc_fixed (sizeof (gpointer) * new_size, NULL);
+ memcpy (entries, handles->entries, sizeof (gpointer) * handles->size);
+ handles->entries = entries;
+ } else {
+ gpointer *entries;
+ guint16 *domain_ids;
+ domain_ids = g_malloc0 (sizeof (guint16) * new_size);
+ entries = g_malloc (sizeof (gpointer) * new_size);
+ /* we disable GC because we could lose some disappearing link updates */
+ mono_gc_disable ();
+ memcpy (entries, handles->entries, sizeof (gpointer) * handles->size);
+ memset (entries + handles->size, 0, sizeof (gpointer) * handles->size);
+ memcpy (domain_ids, handles->domain_ids, sizeof (guint16) * handles->size);
+ for (i = 0; i < handles->size; ++i) {
+ MonoObject *obj = mono_gc_weak_link_get (&(handles->entries [i]));
+ if (handles->entries [i])
+ mono_gc_weak_link_remove (&(handles->entries [i]));
+ /*g_print ("reg/unreg entry %d of type %d at %p to object %p (%p), was: %p\n", i, handles->type, &(entries [i]), obj, entries [i], handles->entries [i]);*/
+ if (obj) {
+ mono_gc_weak_link_add (&(entries [i]), obj);
+ }
+ }
+ g_free (handles->entries);
+ g_free (handles->domain_ids);
+ handles->entries = entries;
+ handles->domain_ids = domain_ids;
+ mono_gc_enable ();
+ }
+
+ /* set i and slot to the next free position */
+ i = 0;
+ slot = (handles->size + 1) / 32;
+ handles->slot_hint = handles->size + 1;
+ handles->size = new_size;
+ }
+ handles->bitmap [slot] |= 1 << i;
+ slot = slot * 32 + i;
+ handles->entries [slot] = obj;
+ if (handles->type <= HANDLE_WEAK_TRACK) {
+ if (obj)
+ mono_gc_weak_link_add (&(handles->entries [slot]), obj);
+ }
+
+ unlock_handles (handles);
+ /*g_print ("allocated entry %d of type %d to object %p (in slot: %p)\n", slot, handles->type, obj, handles->entries [slot]);*/
+ return (slot << 3) | (handles->type + 1);
}
+/**
+ * mono_gchandle_new:
+ * @obj: managed object to get a handle for
+ * @pinned: whether the object should be pinned
+ *
+ * This returns a handle that wraps the object, this is used to keep a
+ * reference to a managed object from the unmanaged world and preventing the
+ * object from being disposed.
+ *
+ * If @pinned is false the address of the object can not be obtained, if it is
+ * true the address of the object can be obtained. This will also pin the
+ * object so it will not be possible by a moving garbage collector to move the
+ * object.
+ *
+ * Returns: a handle that can be used to access the object from
+ * unmanaged code.
+ */
guint32
mono_gchandle_new (MonoObject *obj, gboolean pinned)
{
- return ves_icall_System_GCHandle_GetTargetHandle (obj, 0, pinned? HANDLE_PINNED: HANDLE_NORMAL);
+ return alloc_handle (&gc_handles [pinned? HANDLE_PINNED: HANDLE_NORMAL], obj);
}
+/**
+ * mono_gchandle_new_weakref:
+ * @obj: managed object to get a handle for
+ * @pinned: whether the object should be pinned
+ *
+ * This returns a weak handle that wraps the object, this is used to
+ * keep a reference to a managed object from the unmanaged world.
+ * Unlike the mono_gchandle_new the object can be reclaimed by the
+ * garbage collector. In this case the value of the GCHandle will be
+ * set to zero.
+ *
+ * If @pinned is false the address of the object can not be obtained, if it is
+ * true the address of the object can be obtained. This will also pin the
+ * object so it will not be possible by a moving garbage collector to move the
+ * object.
+ *
+ * Returns: a handle that can be used to access the object from
+ * unmanaged code.
+ */
guint32
mono_gchandle_new_weakref (MonoObject *obj, gboolean track_resurrection)
{
- return ves_icall_System_GCHandle_GetTargetHandle (obj, 0, track_resurrection? HANDLE_WEAK_TRACK: HANDLE_WEAK);
+ return alloc_handle (&gc_handles [track_resurrection? HANDLE_WEAK_TRACK: HANDLE_WEAK], obj);
}
-/* This will return NULL for a collected object if using a weakref handle */
+/**
+ * mono_gchandle_get_target:
+ * @gchandle: a GCHandle's handle.
+ *
+ * The handle was previously created by calling mono_gchandle_new or
+ * mono_gchandle_new_weakref.
+ *
+ * Returns a pointer to the MonoObject represented by the handle or
+ * NULL for a collected object if using a weakref handle.
+ */
MonoObject*
mono_gchandle_get_target (guint32 gchandle)
{
- return ves_icall_System_GCHandle_GetTarget (gchandle);
+ guint slot = gchandle >> 3;
+ guint type = (gchandle & 7) - 1;
+ HandleData *handles = &gc_handles [type];
+ MonoObject *obj = NULL;
+ if (type > 3)
+ return NULL;
+ lock_handles (handles);
+ if (slot < handles->size && (handles->bitmap [slot / 32] & (1 << (slot % 32)))) {
+ if (handles->type <= HANDLE_WEAK_TRACK) {
+ obj = mono_gc_weak_link_get (&handles->entries [slot]);
+ } else {
+ obj = handles->entries [slot];
+ }
+ } else {
+ /* print a warning? */
+ }
+ unlock_handles (handles);
+ /*g_print ("get target of entry %d of type %d: %p\n", slot, handles->type, obj);*/
+ return obj;
+}
+
+static void
+mono_gchandle_set_target (guint32 gchandle, MonoObject *obj)
+{
+ guint slot = gchandle >> 3;
+ guint type = (gchandle & 7) - 1;
+ HandleData *handles = &gc_handles [type];
+ if (type > 3)
+ return;
+ lock_handles (handles);
+ if (slot < handles->size && (handles->bitmap [slot / 32] & (1 << (slot % 32)))) {
+ if (handles->type <= HANDLE_WEAK_TRACK) {
+ if (handles->entries [slot])
+ mono_gc_weak_link_remove (&handles->entries [slot]);
+ if (obj)
+ mono_gc_weak_link_add (&handles->entries [slot], obj);
+ } else {
+ handles->entries [slot] = obj;
+ }
+ } else {
+ /* print a warning? */
+ }
+ /*g_print ("changed entry %d of type %d to object %p (in slot: %p)\n", slot, handles->type, obj, handles->entries [slot]);*/
+ unlock_handles (handles);
+}
+
+/**
+ * mono_gchandle_is_in_domain:
+ * @gchandle: a GCHandle's handle.
+ * @domain: An application domain.
+ *
+ * Returns: true if the object wrapped by the @gchandle belongs to the specific @domain.
+ */
+gboolean
+mono_gchandle_is_in_domain (guint32 gchandle, MonoDomain *domain)
+{
+ guint slot = gchandle >> 3;
+ guint type = (gchandle & 7) - 1;
+ HandleData *handles = &gc_handles [type];
+ gboolean result = FALSE;
+ if (type > 3)
+ return FALSE;
+ lock_handles (handles);
+ if (slot < handles->size && (handles->bitmap [slot / 32] & (1 << (slot % 32)))) {
+ if (handles->type <= HANDLE_WEAK_TRACK) {
+ result = domain->domain_id == handles->domain_ids [slot];
+ } else {
+ MonoObject *obj;
+ obj = handles->entries [slot];
+ if (obj == NULL)
+ result = TRUE;
+ else
+ result = domain == mono_object_domain (obj);
+ }
+ } else {
+ /* print a warning? */
+ }
+ unlock_handles (handles);
+ return result;
}
+/**
+ * mono_gchandle_free:
+ * @gchandle: a GCHandle's handle.
+ *
+ * Frees the @gchandle handle. If there are no outstanding
+ * references, the garbage collector can reclaim the memory of the
+ * object wrapped.
+ */
void
mono_gchandle_free (guint32 gchandle)
{
- ves_icall_System_GCHandle_FreeHandle (gchandle);
+ guint slot = gchandle >> 3;
+ guint type = (gchandle & 7) - 1;
+ HandleData *handles = &gc_handles [type];
+ if (type > 3)
+ return;
+ lock_handles (handles);
+ if (slot < handles->size && (handles->bitmap [slot / 32] & (1 << (slot % 32)))) {
+ if (handles->type <= HANDLE_WEAK_TRACK) {
+ if (handles->entries [slot])
+ mono_gc_weak_link_remove (&handles->entries [slot]);
+ } else {
+ handles->entries [slot] = NULL;
+ }
+ handles->bitmap [slot / 32] &= ~(1 << (slot % 32));
+ } else {
+ /* print a warning? */
+ }
+ /*g_print ("freed entry %d of type %d\n", slot, handles->type);*/
+ unlock_handles (handles);
}
-#if HAVE_BOEHM_GC
+/**
+ * mono_gchandle_free_domain:
+ * @domain: domain that is unloading
+ *
+ * Function used internally to cleanup any GC handle for objects belonging
+ * to the specified domain during appdomain unload.
+ */
+void
+mono_gchandle_free_domain (MonoDomain *domain)
+{
+ guint type;
+
+ for (type = 0; type < 3; ++type) {
+ guint slot;
+ HandleData *handles = &gc_handles [type];
+ lock_handles (handles);
+ for (slot = 0; slot < handles->size; ++slot) {
+ if (!(handles->bitmap [slot / 32] & (1 << (slot % 32))))
+ continue;
+ if (type <= HANDLE_WEAK_TRACK) {
+ if (domain->domain_id == handles->domain_ids [slot]) {
+ handles->bitmap [slot / 32] &= ~(1 << (slot % 32));
+ if (handles->entries [slot])
+ mono_gc_weak_link_remove (&handles->entries [slot]);
+ }
+ } else {
+ if (handles->entries [slot] && mono_object_domain (handles->entries [slot]) == domain) {
+ handles->bitmap [slot / 32] &= ~(1 << (slot % 32));
+ handles->entries [slot] = NULL;
+ }
+ }
+ }
+ unlock_handles (handles);
+ }
+
+}
+
+#ifndef HAVE_NULL_GC
static HANDLE finalizer_event;
static volatile gboolean finished=FALSE;
-static void finalize_notify (void)
+void
+mono_gc_finalize_notify (void)
{
#ifdef DEBUG
g_message (G_GNUC_PRETTY_FUNCTION ": prodding finalizer");
static void
finalize_domain_objects (DomainFinalizationReq *req)
{
- int i;
- GPtrArray *objs;
MonoDomain *domain = req->domain;
-
+
+#ifdef HAVE_BOEHM_GC
while (g_hash_table_size (domain->finalizable_objects_hash) > 0) {
+ int i;
+ GPtrArray *objs;
/*
* Since the domain is unloading, nobody is allowed to put
* new entries into the hash table. But finalize_object might
g_ptr_array_free (objs, TRUE);
}
+#elif defined(HAVE_SGEN_GC)
+#define NUM_FOBJECTS 64
+ MonoObject *to_finalize [NUM_FOBJECTS];
+ int count;
+ while ((count = mono_gc_finalizers_for_domain (domain, to_finalize, NUM_FOBJECTS))) {
+ int i;
+ for (i = 0; i < count; ++i) {
+ run_finalize (to_finalize [i], 0);
+ }
+ }
+#endif
+
+ /* Process finalizers which are already in the queue */
+ mono_gc_invoke_finalizers ();
/* printf ("DONE.\n"); */
SetEvent (req->done_event);
/* Wait to be notified that there's at least one
* finaliser to run
*/
- WaitForSingleObjectEx (finalizer_event, INFINITE, TRUE);
+ /* Use alertable=FALSE since we will be asked to exit using the event too */
+ WaitForSingleObjectEx (finalizer_event, INFINITE, FALSE);
if (domains_to_finalize) {
- EnterCriticalSection (&finalizer_mutex);
+ mono_finalizer_lock ();
if (domains_to_finalize) {
DomainFinalizationReq *req = domains_to_finalize->data;
domains_to_finalize = g_slist_remove (domains_to_finalize, req);
- LeaveCriticalSection (&finalizer_mutex);
+ mono_finalizer_unlock ();
finalize_domain_objects (req);
}
else
- LeaveCriticalSection (&finalizer_mutex);
+ mono_finalizer_unlock ();
}
#ifdef DEBUG
/* If finished == TRUE, mono_gc_cleanup has been called (from mono_runtime_cleanup),
* before the domain is unloaded.
- *
- * There is a bug in GC_invoke_finalizer () in versions <= 6.2alpha4:
- * the 'mem_freed' variable is not initialized when there are no
- * objects to finalize, which leads to strange behavior later on.
- * The check is necessary to work around that bug.
*/
- if (GC_should_invoke_finalizers ()) {
- GC_invoke_finalizers ();
- }
+ mono_gc_invoke_finalizers ();
SetEvent (pending_done_event);
}
*/
#define ENABLE_FINALIZER_THREAD
-#ifdef WITH_INCLUDED_LIBGC
-/* from threads.c */
-extern void mono_gc_stop_world (void);
-extern void mono_gc_start_world (void);
-extern void mono_gc_push_all_stacks (void);
-
-static void mono_gc_lock (void)
-{
- EnterCriticalSection (&allocator_section);
-}
-
-static void mono_gc_unlock (void)
-{
- LeaveCriticalSection (&allocator_section);
-}
-
-static GCThreadFunctions mono_gc_thread_vtable = {
- NULL,
-
- mono_gc_lock,
- mono_gc_unlock,
-
- mono_gc_stop_world,
- NULL,
- mono_gc_push_all_stacks,
- mono_gc_start_world
-};
-#endif /* WITH_INCLUDED_LIBGC */
-
-static void
-mono_gc_warning (char *msg, GC_word arg)
-{
- mono_trace (G_LOG_LEVEL_WARNING, MONO_TRACE_GC, msg, (unsigned long)arg);
-}
-
-void mono_gc_init (void)
+void
+mono_gc_init (void)
{
InitializeCriticalSection (&handle_section);
InitializeCriticalSection (&allocator_section);
InitializeCriticalSection (&finalizer_mutex);
-#ifdef WITH_INCLUDED_LIBGC
- gc_thread_vtable = &mono_gc_thread_vtable;
-#endif
+ MONO_GC_REGISTER_ROOT (gc_handles [HANDLE_NORMAL].entries);
+ MONO_GC_REGISTER_ROOT (gc_handles [HANDLE_PINNED].entries);
+
+ mono_gc_base_init ();
- GC_set_warn_proc (mono_gc_warning);
-
#ifdef ENABLE_FINALIZER_THREAD
if (g_getenv ("GC_DONT_GC")) {
g_assert_not_reached ();
}
- GC_finalize_on_demand = 1;
- GC_finalizer_notifier = finalize_notify;
-
mono_thread_create (mono_domain_get (), finalizer_thread, NULL);
/*
* Wait until the finalizer thread sets gc_thread since its value is needed
if (!gc_disabled) {
ResetEvent (shutdown_event);
finished = TRUE;
- finalize_notify ();
- /* Finishing the finalizer thread, so wait a little bit... */
- /* MS seems to wait for about 2 seconds */
- if (WaitForSingleObjectEx (shutdown_event, 2000, FALSE) == WAIT_TIMEOUT) {
- mono_thread_stop (gc_thread);
+ if (mono_thread_current () != gc_thread) {
+ mono_gc_finalize_notify ();
+ /* Finishing the finalizer thread, so wait a little bit... */
+ /* MS seems to wait for about 2 seconds */
+ if (WaitForSingleObjectEx (shutdown_event, 2000, FALSE) == WAIT_TIMEOUT) {
+ mono_thread_stop (gc_thread);
+ }
}
+ gc_thread = NULL;
+#ifdef HAVE_BOEHM_GC
+ GC_finalizer_notifier = NULL;
+#endif
}
#endif
-}
-void
-mono_gc_disable (void)
-{
-#ifdef HAVE_GC_ENABLE
- GC_disable ();
-#else
- g_assert_not_reached ();
-#endif
-}
-
-void
-mono_gc_enable (void)
-{
-#ifdef HAVE_GC_ENABLE
- GC_enable ();
-#else
- g_assert_not_reached ();
-#endif
+ DeleteCriticalSection (&handle_section);
+ DeleteCriticalSection (&allocator_section);
+ DeleteCriticalSection (&finalizer_mutex);
}
#else
{
}
-void
-mono_gc_disable (void)
-{
-}
-
-void
-mono_gc_enable (void)
-{
-}
-
#endif
+/**
+ * mono_gc_is_finalizer_thread:
+ * @thread: the thread to test.
+ *
+ * In Mono objects are finalized asynchronously on a separate thread.
+ * This routine tests whether the @thread argument represents the
+ * finalization thread.
+ *
+ * Returns true if @thread is the finalization thread.
+ */
gboolean
mono_gc_is_finalizer_thread (MonoThread *thread)
{
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