3 * Mono-agnostic GC interface.
5 * Copyright (C) 2015 Xamarin Inc
7 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
10 #ifndef __MONO_METADATA_GCINTERNALAGNOSTIC_H__
11 #define __MONO_METADATA_GCINTERNALAGNOSTIC_H__
17 #include "mono/utils/mono-compiler.h"
18 #include "mono/utils/parse.h"
19 #include "mono/utils/memfuncs.h"
21 #include "mono/sgen/sgen-conf.h"
24 /* h indicates whether to hide or just tag.
25 * (-!!h ^ p) is used instead of (h ? ~p : p) to avoid multiple mentions of p.
27 #define MONO_GC_HIDE_POINTER(p,t,h) ((gpointer)(((-(size_t)!!(h) ^ (size_t)(p)) & ~(size_t)3) | ((t) & (size_t)3)))
28 #define MONO_GC_REVEAL_POINTER(p,h) ((gpointer)((-(size_t)!!(h) ^ (size_t)(p)) & ~(size_t)3))
30 #define MONO_GC_POINTER_TAG(p) ((size_t)(p) & (size_t)3)
32 #define MONO_GC_HANDLE_OCCUPIED_MASK (1)
33 #define MONO_GC_HANDLE_VALID_MASK (2)
34 #define MONO_GC_HANDLE_TAG_MASK (MONO_GC_HANDLE_OCCUPIED_MASK | MONO_GC_HANDLE_VALID_MASK)
36 #define MONO_GC_HANDLE_METADATA_POINTER(p,h) (MONO_GC_HIDE_POINTER ((p), MONO_GC_HANDLE_OCCUPIED_MASK, (h)))
37 #define MONO_GC_HANDLE_OBJECT_POINTER(p,h) (MONO_GC_HIDE_POINTER ((p), MONO_GC_HANDLE_OCCUPIED_MASK | MONO_GC_HANDLE_VALID_MASK, (h)))
39 #define MONO_GC_HANDLE_OCCUPIED(slot) ((size_t)(slot) & MONO_GC_HANDLE_OCCUPIED_MASK)
40 #define MONO_GC_HANDLE_VALID(slot) ((size_t)(slot) & MONO_GC_HANDLE_VALID_MASK)
42 #define MONO_GC_HANDLE_TAG(slot) ((size_t)(slot) & MONO_GC_HANDLE_TAG_MASK)
44 #define MONO_GC_HANDLE_IS_OBJECT_POINTER(slot) (MONO_GC_HANDLE_TAG (slot) == (MONO_GC_HANDLE_OCCUPIED_MASK | MONO_GC_HANDLE_VALID_MASK))
45 #define MONO_GC_HANDLE_IS_METADATA_POINTER(slot) (MONO_GC_HANDLE_TAG (slot) == MONO_GC_HANDLE_OCCUPIED_MASK)
49 HANDLE_WEAK = HANDLE_TYPE_MIN,
56 #define GC_HANDLE_TYPE_IS_WEAK(x) ((x) <= HANDLE_WEAK_TRACK)
58 #define MONO_GC_HANDLE_TYPE_SHIFT (3)
59 #define MONO_GC_HANDLE_TYPE_MASK ((1 << MONO_GC_HANDLE_TYPE_SHIFT) - 1)
60 #define MONO_GC_HANDLE_TYPE(x) ((GCHandleType)(((x) & MONO_GC_HANDLE_TYPE_MASK) - 1))
61 #define MONO_GC_HANDLE_SLOT(x) ((x) >> MONO_GC_HANDLE_TYPE_SHIFT)
62 #define MONO_GC_HANDLE_TYPE_IS_WEAK(x) ((x) <= HANDLE_WEAK_TRACK)
63 #define MONO_GC_HANDLE(slot, type) (((slot) << MONO_GC_HANDLE_TYPE_SHIFT) | (((type) & MONO_GC_HANDLE_TYPE_MASK) + 1))
66 gint32 minor_gc_count;
67 gint32 major_gc_count;
70 gint64 major_gc_time_concurrent;
73 extern GCStats gc_stats;
76 typedef SgenDescriptor MonoGCDescriptor;
77 #define MONO_GC_DESCRIPTOR_NULL SGEN_DESCRIPTOR_NULL
79 typedef void* MonoGCDescriptor;
80 #define MONO_GC_DESCRIPTOR_NULL NULL
83 gboolean mono_gc_parse_environment_string_extract_number (const char *str, size_t *out);
85 MonoGCDescriptor mono_gc_make_descr_for_object (gsize *bitmap, int numbits, size_t obj_size);
86 MonoGCDescriptor mono_gc_make_descr_for_array (int vector, gsize *elem_bitmap, int numbits, size_t elem_size);
88 /* simple interface for data structures needed in the runtime */
89 MonoGCDescriptor mono_gc_make_descr_from_bitmap (gsize *bitmap, int numbits);
91 /* Return a root descriptor for a vector with repeating refs bitmap */
92 MonoGCDescriptor mono_gc_make_vector_descr (void);
94 /* Return a root descriptor for a root with all refs */
95 MonoGCDescriptor mono_gc_make_root_descr_all_refs (int numbits);
97 /* Return the bitmap encoded by a descriptor */
98 gsize* mono_gc_get_bitmap_for_descr (MonoGCDescriptor descr, int *numbits);
101 These functions must be used when it's possible that either destination is not
102 word aligned or size is not a multiple of word size.
104 void mono_gc_bzero_atomic (void *dest, size_t size);
105 void mono_gc_bzero_aligned (void *dest, size_t size);
106 void mono_gc_memmove_atomic (void *dest, const void *src, size_t size);
107 void mono_gc_memmove_aligned (void *dest, const void *src, size_t size);
109 FILE *mono_gc_get_logfile (void);
111 /* equivalent to options set via MONO_GC_PARAMS */
112 void mono_gc_params_set (const char* options);
113 /* equivalent to options set via MONO_GC_DEBUG */
114 void mono_gc_debug_set (const char* options);