/*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
- *
+ * Copyright (c) 1999-2007 Apple Inc. All Rights Reserved.
+ *
* @APPLE_LICENSE_HEADER_START@
*
- * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
- * Reserved. This file contains Original Code and/or Modifications of
- * Original Code as defined in and that are subject to the Apple Public
- * Source License Version 1.1 (the "License"). You may not use this file
- * except in compliance with the License. Please obtain a copy of the
- * License at http://www.apple.com/publicsource and read it before using
- * this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
*
* The Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
* Copyright 1988-1996, NeXT Software, Inc.
*/
-#if !defined(_OBJC_PRIVATE_H_)
- #define _OBJC_PRIVATE_H_
-
- #import <objc/objc-api.h> // for OBJC_EXPORT
-
- OBJC_EXPORT void checkUniqueness();
-
- #import "objc-config.h"
-
- #if defined(NeXT_PDO)
- #define LITERAL_STRING_OBJECTS
- #import <mach/cthreads_private.h>
- #if defined(WIN32)
- #import <winnt-pdo.h>
- #import <ntunix.h>
- #else
- #import <pdo.h> // for pdo_malloc and pdo_free defines
- #import <sys/time.h>
- #endif
- #else
- #import <pthread.h>
- #define mutex_alloc() (pthread_mutex_t*)calloc(1, sizeof(pthread_mutex_t))
- #define mutex_init(m) pthread_mutex_init(m, NULL)
- #define mutex_lock(m) pthread_mutex_lock(m)
- #define mutex_try_lock(m) (! pthread_mutex_trylock(m))
- #define mutex_unlock(m) pthread_mutex_unlock(m)
- #define mutex_clear(m)
- #define mutex_t pthread_mutex_t*
- #define mutex MUTEX_DEFINE_ERROR
- #import <sys/time.h>
- #endif
-
- #import <stdlib.h>
- #import <stdarg.h>
- #import <stdio.h>
- #import <string.h>
- #import <ctype.h>
-
- #import <objc/objc-runtime.h>
-
- // This needs <...> -- malloc.h is not ours, really...
- #import <objc/malloc.h>
-
-
-/* Opaque cookie used in _getObjc... routines. File format independant.
- * This is used in place of the mach_header. In fact, when compiling
- * for NEXTSTEP, this is really a (struct mach_header *).
- *
- * had been: typedef void *objc_header;
+#ifndef _OBJC_PRIVATE_H_
+#define _OBJC_PRIVATE_H_
+
+#include "objc-config.h"
+
+/* Isolate ourselves from the definitions of id and Class in the compiler
+ * and public headers.
*/
-#if defined(NeXT_PDO)
- typedef void headerType;
-#else
- #import <mach-o/loader.h>
- typedef struct mach_header headerType;
-#endif
-
-#import <objc/Protocol.h>
-
-typedef struct _ProtocolTemplate { @defs(Protocol) } ProtocolTemplate;
-typedef struct _NXConstantStringTemplate {
- Class isa;
- void *characters;
- unsigned int _length;
-} NXConstantStringTemplate;
-
-#if defined(NeXT_PDO)
- #define OBJC_CONSTANT_STRING_PTR NXConstantStringTemplate**
- #define OBJC_CONSTANT_STRING_DEREF
- #define OBJC_PROTOCOL_PTR ProtocolTemplate**
- #define OBJC_PROTOCOL_DEREF ->
-#elif defined(__MACH__)
- #define OBJC_CONSTANT_STRING_PTR NXConstantStringTemplate*
- #define OBJC_CONSTANT_STRING_DEREF &
- #define OBJC_PROTOCOL_PTR ProtocolTemplate*
- #define OBJC_PROTOCOL_DEREF .
+
+#ifdef _OBJC_OBJC_H_
+#error include objc-private.h before other headers
#endif
-// both
-OBJC_EXPORT headerType ** _getObjcHeaders();
-OBJC_EXPORT Module _getObjcModules(headerType *head, int *nmodules);
-OBJC_EXPORT Class * _getObjcClassRefs(headerType *head, int *nclasses);
-OBJC_EXPORT void * _getObjcHeaderData(headerType *head, unsigned *size);
-OBJC_EXPORT const char * _getObjcHeaderName(headerType *head);
-
-#if defined(NeXT_PDO) // GENERIC_OBJ_FILE
- OBJC_EXPORT ProtocolTemplate ** _getObjcProtocols(headerType *head, int *nprotos);
- OBJC_EXPORT NXConstantStringTemplate **_getObjcStringObjects(headerType *head, int *nstrs);
-#elif defined(__MACH__)
- OBJC_EXPORT ProtocolTemplate * _getObjcProtocols(headerType *head, int *nprotos);
- OBJC_EXPORT NXConstantStringTemplate *_getObjcStringObjects(headerType *head, int *nstrs);
- OBJC_EXPORT SEL * _getObjcMessageRefs(headerType *head, int *nmess);
-#endif
-
- #define END_OF_METHODS_LIST ((struct objc_method_list*)-1)
-
- struct header_info
- {
- const headerType * mhdr;
- Module mod_ptr;
- unsigned int mod_count;
- unsigned long image_slide;
- unsigned int objcSize;
+#define OBJC_TYPES_DEFINED 1
+#define OBJC_OLD_DISPATCH_PROTOTYPES 0
+
+#include <cstddef> // for nullptr_t
+#include <stdint.h>
+#include <assert.h>
+
+struct objc_class;
+struct objc_object;
+
+typedef struct objc_class *Class;
+typedef struct objc_object *id;
+
+namespace {
+ class SideTable;
+};
+
+
+union isa_t
+{
+ isa_t() { }
+ isa_t(uintptr_t value) : bits(value) { }
+
+ Class cls;
+ uintptr_t bits;
+
+#if SUPPORT_NONPOINTER_ISA
+
+ // extra_rc must be the MSB-most field (so it matches carry/overflow flags)
+ // indexed must be the LSB (fixme or get rid of it)
+ // shiftcls must occupy the same bits that a real class pointer would
+ // bits + RC_ONE is equivalent to extra_rc + 1
+ // RC_HALF is the high bit of extra_rc (i.e. half of its range)
+
+ // future expansion:
+ // uintptr_t fast_rr : 1; // no r/r overrides
+ // uintptr_t lock : 2; // lock for atomic property, @synch
+ // uintptr_t extraBytes : 1; // allocated with extra bytes
+
+# if __arm64__
+# define ISA_MASK 0x00000001fffffff8ULL
+# define ISA_MAGIC_MASK 0x000003fe00000001ULL
+# define ISA_MAGIC_VALUE 0x000001a400000001ULL
+ struct {
+ uintptr_t indexed : 1;
+ uintptr_t has_assoc : 1;
+ uintptr_t has_cxx_dtor : 1;
+ uintptr_t shiftcls : 30; // MACH_VM_MAX_ADDRESS 0x1a0000000
+ uintptr_t magic : 9;
+ uintptr_t weakly_referenced : 1;
+ uintptr_t deallocating : 1;
+ uintptr_t has_sidetable_rc : 1;
+ uintptr_t extra_rc : 19;
+# define RC_ONE (1ULL<<45)
+# define RC_HALF (1ULL<<18)
};
- typedef struct header_info header_info;
- OBJC_EXPORT header_info *_objc_headerVector (const headerType * const *machhdrs);
- OBJC_EXPORT unsigned int _objc_headerCount (void);
- OBJC_EXPORT void _objc_addHeader (const headerType *header, unsigned long vmaddr_slide);
-
- OBJC_EXPORT int _objcModuleCount();
- OBJC_EXPORT const char *_objcModuleNameAtIndex(int i);
- OBJC_EXPORT Class objc_getOrigClass (const char *name);
-
- extern struct objc_method_list **get_base_method_list(Class cls);
-
-
- OBJC_EXPORT const char *__S(_nameForHeader) (const headerType*);
-
- /* initialize */
- OBJC_EXPORT void _sel_resolve_conflicts(headerType * header, unsigned long slide);
- OBJC_EXPORT void _class_install_relationships(Class, long);
- OBJC_EXPORT void _objc_add_category(Category, int);
- OBJC_EXPORT void *_objc_create_zone(void);
-
- OBJC_EXPORT SEL sel_registerNameNoCopy(const char *str);
-
- /* selector fixup in method lists */
-
- #define _OBJC_FIXED_UP ((void *)1771)
-
- static inline struct objc_method_list *_objc_inlined_fixup_selectors_in_method_list(struct objc_method_list *mlist)
- {
- unsigned i, size;
- Method method;
- struct objc_method_list *old_mlist;
-
- if ( ! mlist ) return (struct objc_method_list *)0;
- if ( mlist->obsolete != _OBJC_FIXED_UP ) {
- old_mlist = mlist;
- size = sizeof(struct objc_method_list) - sizeof(struct objc_method) + old_mlist->method_count * sizeof(struct objc_method);
- mlist = malloc_zone_malloc(_objc_create_zone(), size);
- memmove(mlist, old_mlist, size);
- for ( i = 0; i < mlist->method_count; i += 1 ) {
- method = &mlist->method_list[i];
- method->method_name =
- sel_registerNameNoCopy((const char *)method->method_name);
- }
- mlist->obsolete = _OBJC_FIXED_UP;
- }
- return mlist;
- }
- /* method lookup */
- /* -- inline version of class_nextMethodList(Class, void **) -- */
-
- static inline struct objc_method_list *_class_inlinedNextMethodList(Class cls, void **it)
- {
- struct objc_method_list ***iterator;
-
- iterator = (struct objc_method_list***)it;
- if (*iterator == NULL) {
- *iterator = &((((struct objc_class *) cls)->methodLists)[0]);
- }
- else (*iterator) += 1;
- // Check for list end
- if ((**iterator == NULL) || (**iterator == END_OF_METHODS_LIST)) {
- *it = nil;
- return NULL;
- }
-
- **iterator = _objc_inlined_fixup_selectors_in_method_list(**iterator);
-
- // Return method list pointer
- return **iterator;
- }
+# elif __x86_64__
+# define ISA_MASK 0x00007ffffffffff8ULL
+# define ISA_MAGIC_MASK 0x0000000000000001ULL
+# define ISA_MAGIC_VALUE 0x0000000000000001ULL
+ struct {
+ uintptr_t indexed : 1;
+ uintptr_t has_assoc : 1;
+ uintptr_t has_cxx_dtor : 1;
+ uintptr_t shiftcls : 44; // MACH_VM_MAX_ADDRESS 0x7fffffe00000
+ uintptr_t weakly_referenced : 1;
+ uintptr_t deallocating : 1;
+ uintptr_t has_sidetable_rc : 1;
+ uintptr_t extra_rc : 14;
+# define RC_ONE (1ULL<<50)
+# define RC_HALF (1ULL<<13)
+ };
- OBJC_EXPORT BOOL class_respondsToMethod(Class, SEL);
- OBJC_EXPORT IMP class_lookupMethod(Class, SEL);
- OBJC_EXPORT IMP class_lookupMethodInMethodList(struct objc_method_list *mlist, SEL sel);
- OBJC_EXPORT IMP class_lookupNamedMethodInMethodList(struct objc_method_list *mlist, const char *meth_name);
- OBJC_EXPORT void _objc_insertMethods( struct objc_method_list *mlist, struct objc_method_list ***list );
- OBJC_EXPORT void _objc_removeMethods( struct objc_method_list *mlist, struct objc_method_list ***list );
-
- /* message dispatcher */
- OBJC_EXPORT Cache _cache_create(Class);
- OBJC_EXPORT IMP _class_lookupMethodAndLoadCache(Class, SEL);
- OBJC_EXPORT id _objc_msgForward (id self, SEL sel, ...);
-
- /* errors */
- OBJC_EXPORT volatile void __S(_objc_fatal)(const char *message);
- OBJC_EXPORT volatile void _objc_error(id, const char *, va_list);
- OBJC_EXPORT volatile void __objc_error(id, const char *, ...);
- OBJC_EXPORT void _objc_inform(const char *fmt, ...);
- OBJC_EXPORT void _NXLogError(const char *format, ...);
-
- /* magic */
- OBJC_EXPORT Class _objc_getFreedObjectClass (void);
- OBJC_EXPORT const struct objc_cache emptyCache;
- OBJC_EXPORT void _objc_flush_caches (Class cls);
-
- /* locking */
- #if defined(NeXT_PDO)
- #if defined(WIN32)
- #define MUTEX_TYPE long
- #define OBJC_DECLARE_LOCK(MUTEX) MUTEX_TYPE MUTEX = 0L;
- #elif defined(sparc)
- #define MUTEX_TYPE long
- #define OBJC_DECLARE_LOCK(MUTEX) MUTEX_TYPE MUTEX = 0L;
- #elif defined(__alpha__)
- #define MUTEX_TYPE long
- #define OBJC_DECLARE_LOCK(MUTEX) MUTEX_TYPE MUTEX = 0L;
- #elif defined(__hpux__) || defined(hpux)
- typedef struct { int a; int b; int c; int d; } __mutex_struct;
- #define MUTEX_TYPE __mutex_struct
- #define OBJC_DECLARE_LOCK(MUTEX) MUTEX_TYPE MUTEX = { 1, 1, 1, 1 };
- #else // unknown pdo platform
- #define MUTEX_TYPE long
- #define OBJC_DECLARE_LOCK(MUTEX) struct mutex MUTEX = { 0 };
- #endif // WIN32
- OBJC_EXPORT MUTEX_TYPE classLock;
- OBJC_EXPORT MUTEX_TYPE messageLock;
- #else
- #define MUTEX_TYPE pthread_mutex_t*
- #define OBJC_DECLARE_LOCK(MTX) pthread_mutex_t MTX = PTHREAD_MUTEX_INITIALIZER
- OBJC_EXPORT pthread_mutex_t classLock;
- OBJC_EXPORT pthread_mutex_t messageLock;
- #endif // NeXT_PDO
-
- OBJC_EXPORT int _objc_multithread_mask;
-
- // _objc_msgNil is actually (unsigned dummy, id, SEL) for i386;
- // currently not implemented for any sparc or hppa platforms
- OBJC_EXPORT void (*_objc_msgNil)(id, SEL);
-
- typedef struct {
- long addressOffset;
- long selectorOffset;
- } FixupEntry;
-
- static inline int selEqual( SEL s1, SEL s2 ) {
- OBJC_EXPORT int rocketLaunchingDebug;
- if ( rocketLaunchingDebug )
- checkUniqueness(s1, s2);
- return (s1 == s2);
- }
+# else
+ // Available bits in isa field are architecture-specific.
+# error unknown architecture
+# endif
+
+// SUPPORT_NONPOINTER_ISA
+#endif
- #if defined(OBJC_COLLECTING_CACHE)
- #define OBJC_LOCK(MUTEX) mutex_lock (MUTEX)
- #define OBJC_UNLOCK(MUTEX) mutex_unlock (MUTEX)
- #define OBJC_TRYLOCK(MUTEX) mutex_try_lock (MUTEX)
- #elif defined(NeXT_PDO)
- #if !defined(WIN32)
- /* Where are these defined? NT should probably be using them! */
- OBJC_EXPORT void _objc_private_lock(MUTEX_TYPE*);
- OBJC_EXPORT void _objc_private_unlock(MUTEX_TYPE*);
-
- /* I don't think this should be commented out for NT, should it? */
- #define OBJC_LOCK(MUTEX) \
- do {if (!_objc_multithread_mask) \
- _objc_private_lock(MUTEX);} while(0)
- #define OBJC_UNLOCK(MUTEX) \
- do {if (!_objc_multithread_mask) \
- _objc_private_unlock(MUTEX);} while(0)
- #else
- #define OBJC_LOCK(MUTEX) \
- do {if (!_objc_multithread_mask) \
- if( *MUTEX == 0 ) *MUTEX = 1;} while(0)
- #define OBJC_UNLOCK(MUTEX) \
- do {if (!_objc_multithread_mask) \
- *MUTEX = 0;} while(0)
- #endif // WIN32
-
- #else // not NeXT_PDO
- #define OBJC_LOCK(MUTEX) \
- do \
- { \
- if (!_objc_multithread_mask) \
- mutex_lock (MUTEX); \
- } \
- while (0)
-
- #define OBJC_UNLOCK(MUTEX) \
- do \
- { \
- if (!_objc_multithread_mask) \
- mutex_unlock (MUTEX); \
- } \
- while (0)
- #endif /* OBJC_COLLECTING_CACHE */
-
-#if !defined(SEG_OBJC)
-#define SEG_OBJC "__OBJC" /* objective-C runtime segment */
+};
+
+
+struct objc_object {
+private:
+ isa_t isa;
+
+public:
+
+ // ISA() assumes this is NOT a tagged pointer object
+ Class ISA();
+
+ // getIsa() allows this to be a tagged pointer object
+ Class getIsa();
+
+ // initIsa() should be used to init the isa of new objects only.
+ // If this object already has an isa, use changeIsa() for correctness.
+ // initInstanceIsa(): objects with no custom RR/AWZ
+ // initClassIsa(): class objects
+ // initProtocolIsa(): protocol objects
+ // initIsa(): other objects
+ void initIsa(Class cls /*indexed=false*/);
+ void initClassIsa(Class cls /*indexed=maybe*/);
+ void initProtocolIsa(Class cls /*indexed=maybe*/);
+ void initInstanceIsa(Class cls, bool hasCxxDtor);
+
+ // changeIsa() should be used to change the isa of existing objects.
+ // If this is a new object, use initIsa() for performance.
+ Class changeIsa(Class newCls);
+
+ bool hasIndexedIsa();
+ bool isTaggedPointer();
+ bool isClass();
+
+ // object may have associated objects?
+ bool hasAssociatedObjects();
+ void setHasAssociatedObjects();
+
+ // object may be weakly referenced?
+ bool isWeaklyReferenced();
+ void setWeaklyReferenced_nolock();
+
+ // object may have -.cxx_destruct implementation?
+ bool hasCxxDtor();
+
+ // Optimized calls to retain/release methods
+ id retain();
+ void release();
+ id autorelease();
+
+ // Implementations of retain/release methods
+ id rootRetain();
+ bool rootRelease();
+ id rootAutorelease();
+ bool rootTryRetain();
+ bool rootReleaseShouldDealloc();
+ uintptr_t rootRetainCount();
+
+ // Implementation of dealloc methods
+ bool rootIsDeallocating();
+ void clearDeallocating();
+ void rootDealloc();
+
+private:
+ void initIsa(Class newCls, bool indexed, bool hasCxxDtor);
+
+ // Slow paths for inline control
+ id rootAutorelease2();
+ bool overrelease_error();
+
+#if SUPPORT_NONPOINTER_ISA
+ // Unified retain count manipulation for nonpointer isa
+ id rootRetain(bool tryRetain, bool handleOverflow);
+ bool rootRelease(bool performDealloc, bool handleUnderflow);
+ id rootRetain_overflow(bool tryRetain);
+ bool rootRelease_underflow(bool performDealloc);
+
+ void clearDeallocating_weak();
+
+ // Side table retain count overflow for nonpointer isa
+ void sidetable_lock();
+ void sidetable_unlock();
+
+ void sidetable_moveExtraRC_nolock(size_t extra_rc, bool isDeallocating, bool weaklyReferenced);
+ bool sidetable_addExtraRC_nolock(size_t delta_rc);
+ bool sidetable_subExtraRC_nolock(size_t delta_rc);
+ size_t sidetable_getExtraRC_nolock();
#endif
-#if defined(NeXT_PDO)
- // GENERIC_OBJ_FILE
- void send_load_message_to_category(Category cat, void *header_addr);
- void send_load_message_to_class(Class cls, void *header_addr);
+ // Side-table-only retain count
+ bool sidetable_isDeallocating();
+ void sidetable_clearDeallocating();
+
+ bool sidetable_isWeaklyReferenced();
+ void sidetable_setWeaklyReferenced_nolock();
+
+ id sidetable_retain();
+ id sidetable_retain_slow(SideTable *table);
+
+ bool sidetable_release(bool performDealloc = true);
+ bool sidetable_release_slow(SideTable *table, bool performDealloc = true);
+
+ bool sidetable_tryRetain();
+
+ uintptr_t sidetable_retainCount();
+#if !NDEBUG
+ bool sidetable_present();
+#endif
+};
+
+
+#if __OBJC2__
+typedef struct method_t *Method;
+typedef struct ivar_t *Ivar;
+typedef struct category_t *Category;
+typedef struct property_t *objc_property_t;
+#else
+typedef struct old_method *Method;
+typedef struct old_ivar *Ivar;
+typedef struct old_category *Category;
+typedef struct old_property *objc_property_t;
#endif
-#if !defined(__MACH__)
-typedef struct _objcSectionStruct {
- void **data; /* Pointer to array */
- int count; /* # of elements */
- int size; /* sizeof an element */
-} objcSectionStruct;
-
-typedef struct _objcModHeader {
- char * name;
- objcSectionStruct Modules;
- objcSectionStruct Classes;
- objcSectionStruct Methods;
- objcSectionStruct Protocols;
- objcSectionStruct StringObjects;
-} objcModHeader;
+// Public headers
+
+#include "objc.h"
+#include "runtime.h"
+#include "objc-os.h"
+#include "objc-abi.h"
+#include "objc-api.h"
+#include "objc-auto.h"
+#include "objc-config.h"
+#include "objc-internal.h"
+#include "maptable.h"
+#include "hashtable2.h"
+
+/* Do not include message.h here. */
+/* #include "message.h" */
+
+#define __APPLE_API_PRIVATE
+#include "objc-gdb.h"
+#undef __APPLE_API_PRIVATE
+
+
+// Private headers
+
+#if __OBJC2__
+#include "objc-runtime-new.h"
+#else
+#include "objc-runtime-old.h"
#endif
+#include "objc-references.h"
+#include "objc-initialize.h"
+#include "objc-loadmethod.h"
-static __inline__ int _objc_strcmp(const unsigned char *s1, const unsigned char *s2) {
- int a, b, idx = 0;
- for (;;) {
- a = s1[idx];
- b = s2[idx];
- if (a != b || 0 == a) break;
- idx++;
- }
- return a - b;
-}
-static __inline__ unsigned int _objc_strhash(const unsigned char *s) {
- unsigned int hash = 0;
+__BEGIN_DECLS
+
+
+#if (defined(OBJC_NO_GC) && SUPPORT_GC) || \
+ (!defined(OBJC_NO_GC) && !SUPPORT_GC)
+# error OBJC_NO_GC and SUPPORT_GC inconsistent
+#endif
+
+#if SUPPORT_GC
+# include <auto_zone.h>
+ // PRIVATE_EXTERN is needed to help the compiler know "how" extern these are
+ PRIVATE_EXTERN extern int8_t UseGC; // equivalent to calling objc_collecting_enabled()
+ PRIVATE_EXTERN extern auto_zone_t *gc_zone; // the GC zone, or NULL if no GC
+ extern void objc_addRegisteredClass(Class c);
+ extern void objc_removeRegisteredClass(Class c);
+#else
+# define UseGC NO
+# define gc_zone NULL
+# define objc_addRegisteredClass(c) do {} while(0)
+# define objc_removeRegisteredClass(c) do {} while(0)
+ /* Uses of the following must be protected with UseGC. */
+ extern id gc_unsupported_dont_call();
+# define auto_zone_allocate_object gc_unsupported_dont_call
+# define auto_zone_retain gc_unsupported_dont_call
+# define auto_zone_release gc_unsupported_dont_call
+# define auto_zone_is_valid_pointer gc_unsupported_dont_call
+# define auto_zone_write_barrier_memmove gc_unsupported_dont_call
+# define AUTO_OBJECT_SCANNED 0
+#endif
+
+
+#define _objcHeaderIsReplacement(h) ((h)->info && ((h)->info->flags & OBJC_IMAGE_IS_REPLACEMENT))
+
+/* OBJC_IMAGE_IS_REPLACEMENT:
+ Don't load any classes
+ Don't load any categories
+ Do fix up selector refs (@selector points to them)
+ Do fix up class refs (@class and objc_msgSend points to them)
+ Do fix up protocols (@protocol points to them)
+ Do fix up superclass pointers in classes ([super ...] points to them)
+ Future: do load new classes?
+ Future: do load new categories?
+ Future: do insert new methods on existing classes?
+ Future: do insert new methods on existing categories?
+*/
+
+#define _objcInfoSupportsGC(info) (((info)->flags & OBJC_IMAGE_SUPPORTS_GC) ? 1 : 0)
+#define _objcInfoRequiresGC(info) (((info)->flags & OBJC_IMAGE_REQUIRES_GC) ? 1 : 0)
+#define _objcHeaderSupportsGC(h) ((h)->info && _objcInfoSupportsGC((h)->info))
+#define _objcHeaderRequiresGC(h) ((h)->info && _objcInfoRequiresGC((h)->info))
+
+/* OBJC_IMAGE_SUPPORTS_GC:
+ was compiled with -fobjc-gc flag, regardless of whether write-barriers were issued
+ if executable image compiled this way, then all subsequent libraries etc. must also be this way
+*/
+
+#define _objcHeaderOptimizedByDyld(h) ((h)->info && ((h)->info->flags & OBJC_IMAGE_OPTIMIZED_BY_DYLD))
+
+/* OBJC_IMAGE_OPTIMIZED_BY_DYLD:
+ Assorted metadata precooked in the dyld shared cache.
+ Never set for images outside the shared cache file itself.
+*/
+
+
+typedef struct _header_info {
+ struct _header_info *next;
+ const headerType *mhdr;
+ const objc_image_info *info;
+ const char *fname; // same as Dl_info.dli_fname
+ bool loaded;
+ bool inSharedCache;
+ bool allClassesRealized;
+
+ // Do not add fields without editing ObjCModernAbstraction.hpp
+
+#if !__OBJC2__
+ struct old_protocol **proto_refs;
+ struct objc_module *mod_ptr;
+ size_t mod_count;
+# if TARGET_OS_WIN32
+ struct objc_module **modules;
+ size_t moduleCount;
+ struct old_protocol **protocols;
+ size_t protocolCount;
+ void *imageinfo;
+ size_t imageinfoBytes;
+ SEL *selrefs;
+ size_t selrefCount;
+ struct objc_class **clsrefs;
+ size_t clsrefCount;
+ TCHAR *moduleName;
+# endif
+#endif
+} header_info;
+
+extern header_info *FirstHeader;
+extern header_info *LastHeader;
+extern int HeaderCount;
+
+extern uint32_t AppSDKVersion; // X.Y.Z is 0xXXXXYYZZ
+
+extern void appendHeader(header_info *hi);
+extern void removeHeader(header_info *hi);
+
+extern objc_image_info *_getObjcImageInfo(const headerType *head, size_t *size);
+extern BOOL _hasObjcContents(const header_info *hi);
+
+
+/* selectors */
+extern void sel_init(BOOL gc, size_t selrefCount);
+extern SEL sel_registerNameNoLock(const char *str, BOOL copy);
+extern void sel_lock(void);
+extern void sel_unlock(void);
+extern BOOL sel_preoptimizationValid(const header_info *hi);
+
+extern SEL SEL_load;
+extern SEL SEL_initialize;
+extern SEL SEL_resolveClassMethod;
+extern SEL SEL_resolveInstanceMethod;
+extern SEL SEL_cxx_construct;
+extern SEL SEL_cxx_destruct;
+extern SEL SEL_retain;
+extern SEL SEL_release;
+extern SEL SEL_autorelease;
+extern SEL SEL_retainCount;
+extern SEL SEL_alloc;
+extern SEL SEL_allocWithZone;
+extern SEL SEL_dealloc;
+extern SEL SEL_copy;
+extern SEL SEL_new;
+extern SEL SEL_finalize;
+extern SEL SEL_forwardInvocation;
+extern SEL SEL_tryRetain;
+extern SEL SEL_isDeallocating;
+extern SEL SEL_retainWeakReference;
+extern SEL SEL_allowsWeakReference;
+
+/* preoptimization */
+extern void preopt_init(void);
+extern void disableSharedCacheOptimizations(void);
+extern bool isPreoptimized(void);
+extern header_info *preoptimizedHinfoForHeader(const headerType *mhdr);
+
+#if SUPPORT_PREOPT && __cplusplus
+#include <objc-shared-cache.h>
+using objc_selopt_t = const objc_opt::objc_selopt_t;
+#else
+struct objc_selopt_t;
+#endif
+
+extern objc_selopt_t *preoptimizedSelectors(void);
+extern Class getPreoptimizedClass(const char *name);
+extern Class* copyPreoptimizedClasses(const char *name, int *outCount);
+
+
+/* optional malloc zone for runtime data */
+extern malloc_zone_t *_objc_internal_zone(void);
+extern void *_malloc_internal(size_t size);
+extern void *_calloc_internal(size_t count, size_t size);
+extern void *_realloc_internal(void *ptr, size_t size);
+extern char *_strdup_internal(const char *str);
+extern char *_strdupcat_internal(const char *s1, const char *s2);
+extern uint8_t *_ustrdup_internal(const uint8_t *str);
+extern void *_memdup_internal(const void *mem, size_t size);
+extern void _free_internal(void *ptr);
+extern size_t _malloc_size_internal(void *ptr);
+
+extern Class _calloc_class(size_t size);
+
+/* method lookup */
+extern IMP lookUpImpOrNil(Class, SEL, id obj, bool initialize, bool cache, bool resolver);
+extern IMP lookUpImpOrForward(Class, SEL, id obj, bool initialize, bool cache, bool resolver);
+
+extern IMP lookupMethodInClassAndLoadCache(Class cls, SEL sel);
+extern BOOL class_respondsToSelector_inst(Class cls, SEL sel, id inst);
+
+extern bool objcMsgLogEnabled;
+extern bool logMessageSend(bool isClassMethod,
+ const char *objectsClass,
+ const char *implementingClass,
+ SEL selector);
+
+/* message dispatcher */
+extern IMP _class_lookupMethodAndLoadCache3(id, SEL, Class);
+
+#if !OBJC_OLD_DISPATCH_PROTOTYPES
+extern void _objc_msgForward_impcache(void);
+extern void _objc_ignored_method(void);
+extern void _objc_msgSend_uncached_impcache(void);
+#else
+extern id _objc_msgForward_impcache(id, SEL, ...);
+extern id _objc_ignored_method(id, SEL, ...);
+extern id _objc_msgSend_uncached_impcache(id, SEL, ...);
+#endif
+
+/* errors */
+extern void __objc_error(id, const char *, ...) __attribute__((format (printf, 2, 3), noreturn));
+extern void _objc_inform(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
+extern void _objc_inform_on_crash(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
+extern void _objc_inform_now_and_on_crash(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
+extern void _objc_inform_deprecated(const char *oldname, const char *newname) __attribute__((noinline));
+extern void inform_duplicate(const char *name, Class oldCls, Class cls);
+extern bool crashlog_header_name(header_info *hi);
+extern bool crashlog_header_name_string(const char *name);
+
+/* magic */
+extern Class _objc_getFreedObjectClass (void);
+
+/* map table additions */
+extern void *NXMapKeyCopyingInsert(NXMapTable *table, const void *key, const void *value);
+extern void *NXMapKeyFreeingRemove(NXMapTable *table, const void *key);
+
+/* hash table additions */
+extern unsigned _NXHashCapacity(NXHashTable *table);
+extern void _NXHashRehashToCapacity(NXHashTable *table, unsigned newCapacity);
+
+/* property attribute parsing */
+extern const char *copyPropertyAttributeString(const objc_property_attribute_t *attrs, unsigned int count);
+extern objc_property_attribute_t *copyPropertyAttributeList(const char *attrs, unsigned int *outCount);
+extern char *copyPropertyAttributeValue(const char *attrs, const char *name);
+
+/* locking */
+extern void lock_init(void);
+extern rwlock_t selLock;
+extern mutex_t cacheUpdateLock;
+extern recursive_mutex_t loadMethodLock;
+#if __OBJC2__
+extern rwlock_t runtimeLock;
+#else
+extern mutex_t classLock;
+extern mutex_t methodListLock;
+#endif
+
+/* Lock debugging */
+#if defined(NDEBUG) || TARGET_OS_WIN32
+
+#define mutex_lock(m) _mutex_lock_nodebug(m)
+#define mutex_try_lock(m) _mutex_try_lock_nodebug(m)
+#define mutex_unlock(m) _mutex_unlock_nodebug(m)
+#define mutex_assert_locked(m) do { } while (0)
+#define mutex_assert_unlocked(m) do { } while (0)
+
+#define recursive_mutex_lock(m) _recursive_mutex_lock_nodebug(m)
+#define recursive_mutex_try_lock(m) _recursive_mutex_try_lock_nodebug(m)
+#define recursive_mutex_unlock(m) _recursive_mutex_unlock_nodebug(m)
+#define recursive_mutex_assert_locked(m) do { } while (0)
+#define recursive_mutex_assert_unlocked(m) do { } while (0)
+
+#define monitor_enter(m) _monitor_enter_nodebug(m)
+#define monitor_exit(m) _monitor_exit_nodebug(m)
+#define monitor_wait(m) _monitor_wait_nodebug(m)
+#define monitor_assert_locked(m) do { } while (0)
+#define monitor_assert_unlocked(m) do { } while (0)
+
+#define rwlock_read(m) _rwlock_read_nodebug(m)
+#define rwlock_write(m) _rwlock_write_nodebug(m)
+#define rwlock_try_read(m) _rwlock_try_read_nodebug(m)
+#define rwlock_try_write(m) _rwlock_try_write_nodebug(m)
+#define rwlock_unlock_read(m) _rwlock_unlock_read_nodebug(m)
+#define rwlock_unlock_write(m) _rwlock_unlock_write_nodebug(m)
+#define rwlock_assert_reading(m) do { } while (0)
+#define rwlock_assert_writing(m) do { } while (0)
+#define rwlock_assert_locked(m) do { } while (0)
+#define rwlock_assert_unlocked(m) do { } while (0)
+
+#else
+
+extern int _mutex_lock_debug(mutex_t *lock, const char *name);
+extern int _mutex_try_lock_debug(mutex_t *lock, const char *name);
+extern int _mutex_unlock_debug(mutex_t *lock, const char *name);
+extern void _mutex_assert_locked_debug(mutex_t *lock, const char *name);
+extern void _mutex_assert_unlocked_debug(mutex_t *lock, const char *name);
+
+extern int _recursive_mutex_lock_debug(recursive_mutex_t *lock, const char *name);
+extern int _recursive_mutex_try_lock_debug(recursive_mutex_t *lock, const char *name);
+extern int _recursive_mutex_unlock_debug(recursive_mutex_t *lock, const char *name);
+extern void _recursive_mutex_assert_locked_debug(recursive_mutex_t *lock, const char *name);
+extern void _recursive_mutex_assert_unlocked_debug(recursive_mutex_t *lock, const char *name);
+
+extern int _monitor_enter_debug(monitor_t *lock, const char *name);
+extern int _monitor_exit_debug(monitor_t *lock, const char *name);
+extern int _monitor_wait_debug(monitor_t *lock, const char *name);
+extern void _monitor_assert_locked_debug(monitor_t *lock, const char *name);
+extern void _monitor_assert_unlocked_debug(monitor_t *lock, const char *name);
+
+extern void _rwlock_read_debug(rwlock_t *l, const char *name);
+extern void _rwlock_write_debug(rwlock_t *l, const char *name);
+extern int _rwlock_try_read_debug(rwlock_t *l, const char *name);
+extern int _rwlock_try_write_debug(rwlock_t *l, const char *name);
+extern void _rwlock_unlock_read_debug(rwlock_t *l, const char *name);
+extern void _rwlock_unlock_write_debug(rwlock_t *l, const char *name);
+extern void _rwlock_assert_reading_debug(rwlock_t *l, const char *name);
+extern void _rwlock_assert_writing_debug(rwlock_t *l, const char *name);
+extern void _rwlock_assert_locked_debug(rwlock_t *l, const char *name);
+extern void _rwlock_assert_unlocked_debug(rwlock_t *l, const char *name);
+
+#define mutex_lock(m) _mutex_lock_debug (m, #m)
+#define mutex_try_lock(m) _mutex_try_lock_debug (m, #m)
+#define mutex_unlock(m) _mutex_unlock_debug (m, #m)
+#define mutex_assert_locked(m) _mutex_assert_locked_debug (m, #m)
+#define mutex_assert_unlocked(m) _mutex_assert_unlocked_debug (m, #m)
+
+#define recursive_mutex_lock(m) _recursive_mutex_lock_debug (m, #m)
+#define recursive_mutex_try_lock(m) _recursive_mutex_try_lock_debug (m, #m)
+#define recursive_mutex_unlock(m) _recursive_mutex_unlock_debug (m, #m)
+#define recursive_mutex_assert_locked(m) _recursive_mutex_assert_locked_debug (m, #m)
+#define recursive_mutex_assert_unlocked(m) _recursive_mutex_assert_unlocked_debug (m, #m)
+
+#define monitor_enter(m) _monitor_enter_debug(m, #m)
+#define monitor_exit(m) _monitor_exit_debug(m, #m)
+#define monitor_wait(m) _monitor_wait_debug(m, #m)
+#define monitor_assert_locked(m) _monitor_assert_locked_debug(m, #m)
+#define monitor_assert_unlocked(m) _monitor_assert_unlocked_debug(m, #m)
+
+#define rwlock_read(m) _rwlock_read_debug(m, #m)
+#define rwlock_write(m) _rwlock_write_debug(m, #m)
+#define rwlock_try_read(m) _rwlock_try_read_debug(m, #m)
+#define rwlock_try_write(m) _rwlock_try_write_debug(m, #m)
+#define rwlock_unlock_read(m) _rwlock_unlock_read_debug(m, #m)
+#define rwlock_unlock_write(m) _rwlock_unlock_write_debug(m, #m)
+#define rwlock_assert_reading(m) _rwlock_assert_reading_debug(m, #m)
+#define rwlock_assert_writing(m) _rwlock_assert_writing_debug(m, #m)
+#define rwlock_assert_locked(m) _rwlock_assert_locked_debug(m, #m)
+#define rwlock_assert_unlocked(m) _rwlock_assert_unlocked_debug(m, #m)
+
+#endif
+
+#define rwlock_unlock(m, s) \
+ do { \
+ if ((s) == RDONLY) rwlock_unlock_read(m); \
+ else if ((s) == RDWR) rwlock_unlock_write(m); \
+ } while (0)
+
+
+/* ignored selector support */
+
+/* Non-GC: no ignored selectors
+ GC (i386 Mac): some selectors ignored, remapped to kIgnore
+ GC (others): some selectors ignored, but not remapped
+*/
+
+static inline int ignoreSelector(SEL sel)
+{
+#if !SUPPORT_GC
+ return NO;
+#elif SUPPORT_IGNORED_SELECTOR_CONSTANT
+ return UseGC && sel == (SEL)kIgnore;
+#else
+ return UseGC &&
+ (sel == @selector(retain) ||
+ sel == @selector(release) ||
+ sel == @selector(autorelease) ||
+ sel == @selector(retainCount) ||
+ sel == @selector(dealloc));
+#endif
+}
+
+static inline int ignoreSelectorNamed(const char *sel)
+{
+#if !SUPPORT_GC
+ return NO;
+#else
+ // release retain retainCount dealloc autorelease
+ return (UseGC &&
+ ( (sel[0] == 'r' && sel[1] == 'e' &&
+ (strcmp(&sel[2], "lease") == 0 ||
+ strcmp(&sel[2], "tain") == 0 ||
+ strcmp(&sel[2], "tainCount") == 0 ))
+ ||
+ (strcmp(sel, "dealloc") == 0)
+ ||
+ (sel[0] == 'a' && sel[1] == 'u' &&
+ strcmp(&sel[2], "torelease") == 0)));
+#endif
+}
+
+/* GC startup */
+extern void gc_init(BOOL wantsGC);
+extern void gc_init2(void);
+
+/* Exceptions */
+struct alt_handler_list;
+extern void exception_init(void);
+extern void _destroyAltHandlerList(struct alt_handler_list *list);
+
+/* Class change notifications (gdb only for now) */
+#define OBJC_CLASS_ADDED (1<<0)
+#define OBJC_CLASS_REMOVED (1<<1)
+#define OBJC_CLASS_IVARS_CHANGED (1<<2)
+#define OBJC_CLASS_METHODS_CHANGED (1<<3)
+extern void gdb_objc_class_changed(Class cls, unsigned long changes, const char *classname)
+ __attribute__((noinline));
+
+#if SUPPORT_GC
+
+/* Write barrier implementations */
+extern id objc_getAssociatedObject_non_gc(id object, const void *key);
+extern void objc_setAssociatedObject_non_gc(id object, const void *key, id value, objc_AssociationPolicy policy);
+
+extern id objc_getAssociatedObject_gc(id object, const void *key);
+extern void objc_setAssociatedObject_gc(id object, const void *key, id value, objc_AssociationPolicy policy);
+
+/* xrefs */
+extern objc_xref_t _object_addExternalReference_non_gc(id obj, objc_xref_t type);
+extern id _object_readExternalReference_non_gc(objc_xref_t ref);
+extern void _object_removeExternalReference_non_gc(objc_xref_t ref);
+
+extern objc_xref_t _object_addExternalReference_gc(id obj, objc_xref_t type);
+extern id _object_readExternalReference_gc(objc_xref_t ref);
+extern void _object_removeExternalReference_gc(objc_xref_t ref);
+
+/* GC weak reference fixup. */
+extern void gc_fixup_weakreferences(id newObject, id oldObject);
+
+/* GC datasegment registration. */
+extern void gc_register_datasegment(uintptr_t base, size_t size);
+extern void gc_unregister_datasegment(uintptr_t base, size_t size);
+
+/* objc_dumpHeap implementation */
+extern BOOL _objc_dumpHeap(auto_zone_t *zone, const char *filename);
+
+#endif
+
+
+// Settings from environment variables
+#define OPTION(var, env, help) extern bool var;
+#include "objc-env.h"
+#undef OPTION
+
+extern void environ_init(void);
+
+extern void logReplacedMethod(const char *className, SEL s, BOOL isMeta, const char *catName, IMP oldImp, IMP newImp);
+
+static __inline uint32_t _objc_strhash(const char *s) {
+ uint32_t hash = 0;
for (;;) {
int a = *s++;
if (0 == a) break;
return hash;
}
+
+// objc per-thread storage
+typedef struct {
+ struct _objc_initializing_classes *initializingClasses; // for +initialize
+ struct SyncCache *syncCache; // for @synchronize
+ struct alt_handler_list *handlerList; // for exception alt handlers
+ char *printableNames[4]; // temporary demangled names for logging
+
+ // If you add new fields here, don't forget to update
+ // _objc_pthread_destroyspecific()
+
+} _objc_pthread_data;
+
+extern _objc_pthread_data *_objc_fetch_pthread_data(BOOL create);
+extern void tls_init(void);
+
+// encoding.h
+extern unsigned int encoding_getNumberOfArguments(const char *typedesc);
+extern unsigned int encoding_getSizeOfArguments(const char *typedesc);
+extern unsigned int encoding_getArgumentInfo(const char *typedesc, unsigned int arg, const char **type, int *offset);
+extern void encoding_getReturnType(const char *t, char *dst, size_t dst_len);
+extern char * encoding_copyReturnType(const char *t);
+extern void encoding_getArgumentType(const char *t, unsigned int index, char *dst, size_t dst_len);
+extern char *encoding_copyArgumentType(const char *t, unsigned int index);
+
+// sync.h
+extern void _destroySyncCache(struct SyncCache *cache);
+
+// arr
+extern void arr_init(void);
+extern id objc_autoreleaseReturnValue(id obj);
+
+// block trampolines
+extern IMP _imp_implementationWithBlockNoCopy(id block);
+
+// layout.h
+typedef struct {
+ uint8_t *bits;
+ size_t bitCount;
+ size_t bitsAllocated;
+ BOOL weak;
+} layout_bitmap;
+extern layout_bitmap layout_bitmap_create(const unsigned char *layout_string, size_t layoutStringInstanceSize, size_t instanceSize, BOOL weak);
+extern layout_bitmap layout_bitmap_create_empty(size_t instanceSize, BOOL weak);
+extern void layout_bitmap_free(layout_bitmap bits);
+extern const unsigned char *layout_string_create(layout_bitmap bits);
+extern void layout_bitmap_set_ivar(layout_bitmap bits, const char *type, size_t offset);
+extern void layout_bitmap_grow(layout_bitmap *bits, size_t newCount);
+extern void layout_bitmap_slide(layout_bitmap *bits, size_t oldPos, size_t newPos);
+extern void layout_bitmap_slide_anywhere(layout_bitmap *bits, size_t oldPos, size_t newPos);
+extern BOOL layout_bitmap_splat(layout_bitmap dst, layout_bitmap src,
+ size_t oldSrcInstanceSize);
+extern BOOL layout_bitmap_or(layout_bitmap dst, layout_bitmap src, const char *msg);
+extern BOOL layout_bitmap_clear(layout_bitmap dst, layout_bitmap src, const char *msg);
+extern void layout_bitmap_print(layout_bitmap bits);
+
+
+// fixme runtime
+extern Class look_up_class(const char *aClassName, BOOL includeUnconnected, BOOL includeClassHandler);
+extern const char *map_images(enum dyld_image_states state, uint32_t infoCount, const struct dyld_image_info infoList[]);
+extern const char *map_images_nolock(enum dyld_image_states state, uint32_t infoCount, const struct dyld_image_info infoList[]);
+extern const char * load_images(enum dyld_image_states state, uint32_t infoCount, const struct dyld_image_info infoList[]);
+extern BOOL load_images_nolock(enum dyld_image_states state, uint32_t infoCount, const struct dyld_image_info infoList[]);
+extern void unmap_image(const struct mach_header *mh, intptr_t vmaddr_slide);
+extern void unmap_image_nolock(const struct mach_header *mh);
+extern void _read_images(header_info **hList, uint32_t hCount);
+extern void prepare_load_methods(header_info *hi);
+extern void _unload_image(header_info *hi);
+extern const char ** _objc_copyClassNamesForImage(header_info *hi, unsigned int *outCount);
+
+
+extern const header_info *_headerForClass(Class cls);
+
+extern Class _class_remap(Class cls);
+extern Class _class_getNonMetaClass(Class cls, id obj);
+extern Ivar _class_getVariable(Class cls, const char *name, Class *memberOf);
+extern BOOL _class_usesAutomaticRetainRelease(Class cls);
+extern uint32_t _class_getInstanceStart(Class cls);
+
+extern unsigned _class_createInstancesFromZone(Class cls, size_t extraBytes, void *zone, id *results, unsigned num_requested);
+extern id _objc_constructOrFree(id bytes, Class cls);
+
+extern const char *_category_getName(Category cat);
+extern const char *_category_getClassName(Category cat);
+extern Class _category_getClass(Category cat);
+extern IMP _category_getLoadMethod(Category cat);
+
+extern id object_cxxConstructFromClass(id obj, Class cls);
+extern void object_cxxDestruct(id obj);
+
+extern void _class_resolveMethod(Class cls, SEL sel, id inst);
+
+#define OBJC_WARN_DEPRECATED \
+ do { \
+ static int warned = 0; \
+ if (!warned) { \
+ warned = 1; \
+ _objc_inform_deprecated(__FUNCTION__, NULL); \
+ } \
+ } while (0) \
+
+__END_DECLS
+
+
+#ifndef STATIC_ASSERT
+# define STATIC_ASSERT(x) _STATIC_ASSERT2(x, __LINE__)
+# define _STATIC_ASSERT2(x, line) _STATIC_ASSERT3(x, line)
+# define _STATIC_ASSERT3(x, line) \
+ typedef struct { \
+ int _static_assert[(x) ? 0 : -1]; \
+ } _static_assert_ ## line __attribute__((unavailable))
+#endif
+
+#define countof(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+
+// Global operator new and delete. We must not use any app overrides.
+// This ALSO REQUIRES each of these be in libobjc's unexported symbol list.
+#if __cplusplus
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Winline-new-delete"
+#include <new>
+inline void* operator new(std::size_t size) throw (std::bad_alloc) { return _malloc_internal(size); }
+inline void* operator new[](std::size_t size) throw (std::bad_alloc) { return _malloc_internal(size); }
+inline void* operator new(std::size_t size, const std::nothrow_t&) throw() { return _malloc_internal(size); }
+inline void* operator new[](std::size_t size, const std::nothrow_t&) throw() { return _malloc_internal(size); }
+inline void operator delete(void* p) throw() { _free_internal(p); }
+inline void operator delete[](void* p) throw() { _free_internal(p); }
+inline void operator delete(void* p, const std::nothrow_t&) throw() { _free_internal(p); }
+inline void operator delete[](void* p, const std::nothrow_t&) throw() { _free_internal(p); }
+#pragma clang diagnostic pop
+#endif
+
+
+// DisguisedPtr<T> acts like pointer type T*, except the
+// stored value is disguised to hide it from tools like `leaks`.
+// nil is disguised as itself so zero-filled memory works as expected,
+// which means 0x80..00 is also diguised as itself but we don't care
+template <typename T>
+class DisguisedPtr {
+ uintptr_t value;
+
+ static uintptr_t disguise(T* ptr) {
+ return -(uintptr_t)ptr;
+ }
+
+ static T* undisguise(uintptr_t val) {
+ return (T*)-val;
+ }
+
+ public:
+ DisguisedPtr() { }
+ DisguisedPtr(T* ptr)
+ : value(disguise(ptr)) { }
+ DisguisedPtr(const DisguisedPtr<T>& ptr)
+ : value(ptr.value) { }
+
+ DisguisedPtr<T>& operator = (T* rhs) {
+ value = disguise(rhs);
+ return *this;
+ }
+ DisguisedPtr<T>& operator = (const DisguisedPtr<T>& rhs) {
+ value = rhs.value;
+ return *this;
+ }
+
+ operator T* () const {
+ return undisguise(value);
+ }
+ T* operator -> () const {
+ return undisguise(value);
+ }
+ T& operator * () const {
+ return *undisguise(value);
+ }
+ T& operator [] (size_t i) const {
+ return undisguise(value)[i];
+ }
+
+ // pointer arithmetic operators omitted
+ // because we don't currently use them anywhere
+};
+
+
+// Pointer hash function.
+// This is not a terrific hash, but it is fast
+// and not outrageously flawed for our purposes.
+
+// Based on principles from http://locklessinc.com/articles/fast_hash/
+// and evaluation ideas from http://floodyberry.com/noncryptohashzoo/
+#if __LP64__
+static inline uint32_t ptr_hash(uint64_t key)
+{
+ key ^= key >> 4;
+ key *= 0x8a970be7488fda55;
+ key ^= __builtin_bswap64(key);
+ return (uint32_t)key;
+}
+#else
+static inline uint32_t ptr_hash(uint32_t key)
+{
+ key ^= key >> 4;
+ key *= 0x5052acdb;
+ key ^= __builtin_bswap32(key);
+ return key;
+}
+#endif
+
+/*
+ Higher-quality hash function. This is measurably slower in some workloads.
+#if __LP64__
+ uint32_t ptr_hash(uint64_t key)
+{
+ key -= __builtin_bswap64(key);
+ key *= 0x8a970be7488fda55;
+ key ^= __builtin_bswap64(key);
+ key *= 0x8a970be7488fda55;
+ key ^= __builtin_bswap64(key);
+ return (uint32_t)key;
+}
+#else
+static uint32_t ptr_hash(uint32_t key)
+{
+ key -= __builtin_bswap32(key);
+ key *= 0x5052acdb;
+ key ^= __builtin_bswap32(key);
+ key *= 0x5052acdb;
+ key ^= __builtin_bswap32(key);
+ return key;
+}
+#endif
+*/
+
+
+// Inlined parts of objc_object's implementation
+#include "objc-object.h"
+
#endif /* _OBJC_PRIVATE_H_ */
projects / apple / objc4.git / blobdiff