/*
+ * sgen-scan-object.h: Generic object scan.
+ *
* Copyright 2001-2003 Ximian, Inc
* Copyright 2003-2010 Novell, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * Copyright (C) 2013 Xamarin Inc
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License 2.0 as published by the Free Software Foundation;
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License 2.0 along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* Scans one object, using the OBJ_XXX macros. The start of the
* object must be given in the variable "char* start". Afterwards,
* "start" will point to the start of the next object, if the scanned
* object contained references. If not, the value of "start" should
- * be considered undefined after executing this code.
+ * be considered undefined after executing this code. The object's
+ * GC descriptor must be in the variable "mword desc".
+ *
+ * The macro `HANDLE_PTR` will be invoked for every reference encountered while scanning the
+ * object. It is called with two parameters: The pointer to the reference (not the
+ * reference itself!) as well as the pointer to the scanned object.
*
* Modifiers (automatically undefined):
*
* SCAN_OBJECT_NOSCAN - if defined, don't actually scan the object,
* i.e. don't invoke the OBJ_XXX macros.
*
- * SCAN_OBJECT_ACTION - is invoked after an object has been scanned.
- * The object's start is "start", its length in bytes (including
- * padding at the end) is "skip_size". "desc" is the object's GC
- * descriptor. The action can use the macro
- * "SCAN" to scan the object.
- *
* SCAN_OBJECT_NOVTABLE - desc is provided by the includer, instead of
* vt. Complex arrays cannot not be scanned.
+ *
+ * SCAN_OBJECT_PROTOCOL - if defined, binary protocol the scan.
+ * Should only be used for scanning that's done for the actual
+ * collection, not for debugging scans.
*/
-#ifndef SCAN_OBJECT_ACTION
-#define SCAN_OBJECT_ACTION
-#endif
-
{
#ifndef SCAN_OBJECT_NOVTABLE
- GCVTable *vt;
- mword desc;
-
- vt = (GCVTable*)SGEN_LOAD_VTABLE (start);
- //type = vt->desc & 0x7;
-
- /* gcc should be smart enough to remove the bounds check, but it isn't:( */
- desc = vt->desc;
+#if defined(SGEN_HEAVY_BINARY_PROTOCOL) && defined(SCAN_OBJECT_PROTOCOL)
+ binary_protocol_scan_begin (start, SGEN_LOAD_VTABLE (start), sgen_safe_object_get_size ((MonoObject*)start));
+#endif
+#else
+#if defined(SGEN_HEAVY_BINARY_PROTOCOL) && defined(SCAN_OBJECT_PROTOCOL)
+ binary_protocol_scan_vtype_begin (start + sizeof (MonoObject), size);
+#endif
#endif
- switch (desc & 0x7) {
+ switch (desc & DESC_TYPE_MASK) {
case DESC_TYPE_RUN_LENGTH:
#define SCAN OBJ_RUN_LEN_FOREACH_PTR (desc, start)
#ifndef SCAN_OBJECT_NOSCAN
SCAN;
#endif
- SCAN_OBJECT_ACTION;
-#undef SCAN
- break;
- case DESC_TYPE_SMALL_BITMAP:
-#define SCAN OBJ_BITMAP_FOREACH_PTR (desc, start)
-#ifndef SCAN_OBJECT_NOSCAN
- SCAN;
-#endif
- SCAN_OBJECT_ACTION;
#undef SCAN
break;
case DESC_TYPE_VECTOR:
#ifndef SCAN_OBJECT_NOSCAN
SCAN;
#endif
- SCAN_OBJECT_ACTION;
#undef SCAN
break;
- case DESC_TYPE_LARGE_BITMAP:
-#define SCAN OBJ_LARGE_BITMAP_FOREACH_PTR (desc, start)
+ case DESC_TYPE_BITMAP:
+#define SCAN OBJ_BITMAP_FOREACH_PTR (desc, start)
#ifndef SCAN_OBJECT_NOSCAN
SCAN;
#endif
- SCAN_OBJECT_ACTION;
#undef SCAN
break;
case DESC_TYPE_COMPLEX:
#ifndef SCAN_OBJECT_NOSCAN
SCAN;
#endif
- SCAN_OBJECT_ACTION;
#undef SCAN
break;
#ifndef SCAN_OBJECT_NOVTABLE
case DESC_TYPE_COMPLEX_ARR:
/* this is an array of complex structs */
-#define SCAN OBJ_COMPLEX_ARR_FOREACH_PTR (vt, start)
+#define SCAN OBJ_COMPLEX_ARR_FOREACH_PTR (desc, start)
#ifndef SCAN_OBJECT_NOSCAN
SCAN;
#endif
- SCAN_OBJECT_ACTION;
#undef SCAN
break;
#endif
+ case DESC_TYPE_SMALL_PTRFREE:
case DESC_TYPE_COMPLEX_PTRFREE:
/*Nothing to do*/
- SCAN_OBJECT_ACTION;
break;
default:
g_assert_not_reached ();
}
#undef SCAN_OBJECT_NOSCAN
-#undef SCAN_OBJECT_ACTION
#undef SCAN_OBJECT_NOVTABLE
+#undef SCAN_OBJECT_PROTOCOL
projects / mono.git / blobdiff