2 * metadata/gc-internal.h: Internal GC interface
4 * Author: Paolo Molaro <lupus@ximian.com>
6 * (C) 2002 Ximian, Inc.
9 #ifndef __MONO_METADATA_GC_INTERNAL_H__
10 #define __MONO_METADATA_GC_INTERNAL_H__
13 #include <mono/metadata/object-internals.h>
14 #include <mono/metadata/threads-types.h>
15 #include <mono/utils/gc_wrapper.h>
17 #define mono_domain_finalizers_lock(domain) EnterCriticalSection (&(domain)->finalizable_objects_hash_lock);
18 #define mono_domain_finalizers_unlock(domain) LeaveCriticalSection (&(domain)->finalizable_objects_hash_lock);
20 #define MONO_GC_REGISTER_ROOT(x) mono_gc_register_root ((char*)&(x), sizeof(x), NULL)
22 #define MONO_GC_UNREGISTER_ROOT(x) mono_gc_deregister_root ((char*)&(x))
24 void mono_object_register_finalizer (MonoObject
*obj
) MONO_INTERNAL
;
25 void ves_icall_System_GC_InternalCollect (int generation
) MONO_INTERNAL
;
26 gint64
ves_icall_System_GC_GetTotalMemory (MonoBoolean forceCollection
) MONO_INTERNAL
;
27 void ves_icall_System_GC_KeepAlive (MonoObject
*obj
) MONO_INTERNAL
;
28 void ves_icall_System_GC_ReRegisterForFinalize (MonoObject
*obj
) MONO_INTERNAL
;
29 void ves_icall_System_GC_SuppressFinalize (MonoObject
*obj
) MONO_INTERNAL
;
30 void ves_icall_System_GC_WaitForPendingFinalizers (void) MONO_INTERNAL
;
32 MonoObject
*ves_icall_System_GCHandle_GetTarget (guint32 handle
) MONO_INTERNAL
;
33 guint32
ves_icall_System_GCHandle_GetTargetHandle (MonoObject
*obj
, guint32 handle
, gint32 type
) MONO_INTERNAL
;
34 void ves_icall_System_GCHandle_FreeHandle (guint32 handle
) MONO_INTERNAL
;
35 gpointer
ves_icall_System_GCHandle_GetAddrOfPinnedObject (guint32 handle
) MONO_INTERNAL
;
36 void ves_icall_System_GC_register_ephemeron_array (MonoObject
*array
) MONO_INTERNAL
;
37 MonoObject
*ves_icall_System_GC_get_ephemeron_tombstone (void) MONO_INTERNAL
;
39 extern void mono_gc_init (void) MONO_INTERNAL
;
40 extern void mono_gc_base_init (void) MONO_INTERNAL
;
41 extern void mono_gc_cleanup (void) MONO_INTERNAL
;
42 extern void mono_gc_enable (void) MONO_INTERNAL
;
43 extern void mono_gc_disable (void) MONO_INTERNAL
;
46 * Return whenever the current thread is registered with the GC (i.e. started
47 * by the GC pthread wrappers on unix.
49 extern gboolean
mono_gc_is_gc_thread (void) MONO_INTERNAL
;
52 * Try to register a foreign thread with the GC, if we fail or the backend
53 * can't cope with this concept - we return FALSE.
55 extern gboolean
mono_gc_register_thread (void *baseptr
) MONO_INTERNAL
;
57 extern gboolean
mono_gc_is_finalizer_internal_thread (MonoInternalThread
*thread
) MONO_INTERNAL
;
59 /* only valid after the RECLAIM_START GC event and before RECLAIM_END
60 * Not exported in public headers, but can be linked to (unsupported).
62 extern gboolean
mono_object_is_alive (MonoObject
* obj
);
63 extern gboolean
mono_gc_is_finalizer_thread (MonoThread
*thread
);
64 extern gpointer
mono_gc_out_of_memory (size_t size
);
65 extern void mono_gc_enable_events (void);
67 /* disappearing link functionality */
68 void mono_gc_weak_link_add (void **link_addr
, MonoObject
*obj
, gboolean track
) MONO_INTERNAL
;
69 void mono_gc_weak_link_remove (void **link_addr
) MONO_INTERNAL
;
70 MonoObject
*mono_gc_weak_link_get (void **link_addr
) MONO_INTERNAL
;
73 void mono_gc_add_weak_track_handle (MonoObject
*obj
, guint32 gchandle
) MONO_INTERNAL
;
74 void mono_gc_change_weak_track_handle (MonoObject
*old_obj
, MonoObject
*obj
, guint32 gchandle
) MONO_INTERNAL
;
75 void mono_gc_remove_weak_track_handle (guint32 gchandle
) MONO_INTERNAL
;
76 GSList
* mono_gc_remove_weak_track_object (MonoDomain
*domain
, MonoObject
*obj
) MONO_INTERNAL
;
79 /*Ephemeron functionality. Sgen only*/
80 gboolean
mono_gc_ephemeron_array_add (MonoObject
*obj
) MONO_INTERNAL
;
84 GCHandle_CheckCurrentDomain (guint32 gchandle
) MONO_INTERNAL
;
86 /* simple interface for data structures needed in the runtime */
87 void* mono_gc_make_descr_from_bitmap (gsize
*bitmap
, int numbits
) MONO_INTERNAL
;
89 /* User defined marking function */
90 /* It should work like this:
91 * foreach (ref in GC references in the are structure pointed to by ADDR)
94 typedef void (*MonoGCMarkFunc
) (void **addr
);
95 typedef void (*MonoGCRootMarkFunc
) (void *addr
, MonoGCMarkFunc mark_func
);
97 /* Create a descriptor with a user defined marking function */
98 void *mono_gc_make_root_descr_user (MonoGCRootMarkFunc marker
);
100 /* desc is the result from mono_gc_make_descr*. A NULL value means
101 * all the words might contain GC pointers.
102 * The memory is non-moving and it will be explicitly deallocated.
103 * size bytes will be available from the returned address (ie, descr
104 * must not be stored in the returned memory)
106 void* mono_gc_alloc_fixed (size_t size
, void *descr
) MONO_INTERNAL
;
107 void mono_gc_free_fixed (void* addr
) MONO_INTERNAL
;
109 /* make sure the gchandle was allocated for an object in domain */
110 gboolean
mono_gchandle_is_in_domain (guint32 gchandle
, MonoDomain
*domain
) MONO_INTERNAL
;
111 void mono_gchandle_free_domain (MonoDomain
*domain
) MONO_INTERNAL
;
113 typedef void (*FinalizerThreadCallback
) (gpointer user_data
);
115 /* if there are finalizers to run, run them. Returns the number of finalizers run */
116 gboolean
mono_gc_pending_finalizers (void) MONO_INTERNAL
;
117 void mono_gc_finalize_notify (void) MONO_INTERNAL
;
119 void* mono_gc_alloc_pinned_obj (MonoVTable
*vtable
, size_t size
) MONO_INTERNAL
;
120 void* mono_gc_alloc_obj (MonoVTable
*vtable
, size_t size
) MONO_INTERNAL
;
121 void* mono_gc_alloc_vector (MonoVTable
*vtable
, size_t size
, uintptr_t max_length
) MONO_INTERNAL
;
122 void* mono_gc_alloc_array (MonoVTable
*vtable
, size_t size
, uintptr_t max_length
, uintptr_t bounds_size
) MONO_INTERNAL
;
123 void* mono_gc_alloc_string (MonoVTable
*vtable
, size_t size
, gint32 len
) MONO_INTERNAL
;
124 void* mono_gc_make_descr_for_string (gsize
*bitmap
, int numbits
) MONO_INTERNAL
;
125 void* mono_gc_make_descr_for_object (gsize
*bitmap
, int numbits
, size_t obj_size
) MONO_INTERNAL
;
126 void* mono_gc_make_descr_for_array (int vector
, gsize
*elem_bitmap
, int numbits
, size_t elem_size
) MONO_INTERNAL
;
128 void mono_gc_register_for_finalization (MonoObject
*obj
, void *user_data
) MONO_INTERNAL
;
129 void mono_gc_add_memory_pressure (gint64 value
) MONO_INTERNAL
;
130 int mono_gc_register_root (char *start
, size_t size
, void *descr
) MONO_INTERNAL
;
131 void mono_gc_deregister_root (char* addr
) MONO_INTERNAL
;
132 int mono_gc_finalizers_for_domain (MonoDomain
*domain
, MonoObject
**out_array
, int out_size
) MONO_INTERNAL
;
133 void mono_gc_run_finalize (void *obj
, void *data
) MONO_INTERNAL
;
134 void mono_gc_clear_domain (MonoDomain
* domain
) MONO_INTERNAL
;
137 * Register a root which can only be written using a write barrier.
138 * Writes to the root must be done using a write barrier (MONO_ROOT_SETREF).
139 * If the root uses an user defined mark routine, the writes are not required to be
140 * to the area between START and START+SIZE.
141 * The write barrier allows the GC to avoid scanning this root at each collection, so it
143 * FIXME: Add an API for clearing remset entries if a root with a user defined
144 * mark routine is deleted.
146 int mono_gc_register_root_wbarrier (char *start
, size_t size
, void *descr
) MONO_INTERNAL
;
148 void mono_gc_wbarrier_set_root (gpointer ptr
, MonoObject
*value
) MONO_INTERNAL
;
150 /* Set a field of a root registered using mono_gc_register_root_wbarrier () */
151 #define MONO_ROOT_SETREF(s,fieldname,value) do { \
152 mono_gc_wbarrier_set_root (&((s)->fieldname), (MonoObject*)value); \
155 void mono_gc_finalize_threadpool_threads (void) MONO_INTERNAL
;
157 /* fast allocation support */
159 /* Accessible using mono_marshal_wrapper_info_from_wrapper () */
162 } AllocatorWrapperInfo
;
164 MonoMethod
* mono_gc_get_managed_allocator (MonoVTable
*vtable
, gboolean for_box
) MONO_INTERNAL
;
165 MonoMethod
* mono_gc_get_managed_array_allocator (MonoVTable
*vtable
, int rank
) MONO_INTERNAL
;
166 MonoMethod
*mono_gc_get_managed_allocator_by_type (int atype
) MONO_INTERNAL
;
168 guint32
mono_gc_get_managed_allocator_types (void) MONO_INTERNAL
;
170 /* Fast write barriers */
171 MonoMethod
* mono_gc_get_write_barrier (void) MONO_INTERNAL
;
173 /* Fast valuetype copy */
174 void mono_gc_wbarrier_value_copy_bitmap (gpointer dest
, gpointer src
, int size
, unsigned bitmap
) MONO_INTERNAL
;
176 /* helper for the managed alloc support */
177 MonoString
*mono_string_alloc (int length
) MONO_INTERNAL
;
180 * Functions supplied by the runtime and called by the GC. Currently only used
185 * Function called during thread startup/attach to allocate thread-local data
186 * needed by the other functions.
188 gpointer (*thread_attach_func
) (void);
189 /* FIXME: Add a cleanup function too */
191 * Function called from every thread when suspending for GC. It can save
192 * data needed for marking from thread stacks. user_data is the data returned
193 * by attach_func. This might called with GC locks held and the word stopped,
194 * so it shouldn't do any synchronization etc.
196 void (*thread_suspend_func
) (gpointer user_data
, void *sigcontext
);
198 * Function called to mark from thread stacks. user_data is the data returned
199 * by attach_func. This is called twice, with the word stopped:
200 * - in the first pass, it should mark areas of the stack using
201 * conservative marking by calling mono_gc_conservatively_scan_area ().
202 * - in the second pass, it should mark the remaining areas of the stack
203 * using precise marking by calling mono_gc_scan_object ().
205 void (*thread_mark_func
) (gpointer user_data
, guint8
*stack_start
, guint8
*stack_end
, gboolean precise
);
208 /* Set the callback functions callable by the GC */
209 void mono_gc_set_gc_callbacks (MonoGCCallbacks
*callbacks
) MONO_INTERNAL
;
211 /* Functions callable from the thread mark func */
213 /* Scan the memory area between START and END conservatively */
214 void mono_gc_conservatively_scan_area (void *start
, void *end
) MONO_INTERNAL
;
216 /* Scan OBJ, returning its new address */
217 void *mono_gc_scan_object (void *obj
) MONO_INTERNAL
;
219 /* Return the bitmap encoded by a descriptor */
220 gsize
* mono_gc_get_bitmap_for_descr (void *descr
, int *numbits
) MONO_INTERNAL
;
222 /* Return the suspend signal number used by the GC to suspend threads,
223 or -1 if not applicable. */
224 int mono_gc_get_suspend_signal (void) MONO_INTERNAL
;
226 typedef void* (*MonoGCLockedCallbackFunc
) (void *data
);
228 void* mono_gc_invoke_with_gc_lock (MonoGCLockedCallbackFunc func
, void *data
) MONO_INTERNAL
;
231 int mono_gc_get_los_limit (void) MONO_INTERNAL
;
234 #endif /* __MONO_METADATA_GC_INTERNAL_H__ */