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CFRuntime.c
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/* CFRuntime.c
Copyright (c) 1999-2018, Apple Inc. and the Swift project authors
Portions Copyright (c) 2014-2018, Apple Inc. and the Swift project authors
Licensed under Apache License v2.0 with Runtime Library Exception
See http://swift.org/LICENSE.txt for license information
See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
Responsibility: Christopher Kane
*/
#define ENABLE_ZOMBIES 1
#include <CoreFoundation/CFBase.h>
#include <CoreFoundation/CFRuntime.h>
#include "CFRuntime_Internal.h"
#include "CFInternal.h"
#include "CFBasicHash.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <CoreFoundation/CFUUID.h>
#include <CoreFoundation/CFCalendar.h>
#include <CoreFoundation/CFURLComponents.h>
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || DEPLOYMENT_TARGET_EMBEDDED_MINI
#include <dlfcn.h>
#include <mach-o/dyld.h>
#include <mach/mach.h>
#include <crt_externs.h>
#include <unistd.h>
#include <sys/stat.h>
#include <CoreFoundation/CFStringDefaultEncoding.h>
#endif
#include <CoreFoundation/CFUUID.h>
#include <CoreFoundation/CFTimeZone.h>
#include <CoreFoundation/CFCalendar.h>
#if DEPLOYMENT_TARGET_EMBEDDED
// This isn't in the embedded runtime.h header
OBJC_EXPORT void *objc_destructInstance(id obj);
#endif
#if DEPLOYMENT_TARGET_WINDOWS
#include <Shellapi.h>
#endif
enum {
// retain/release recording constants -- must match values
// used by OA for now; probably will change in the future
__kCFRetainEvent = 28,
__kCFReleaseEvent = 29
};
#if DEPLOYMENT_TARGET_WINDOWS || DEPLOYMENT_TARGET_LINUX
#include <malloc.h>
#elif DEPLOYMENT_TARGET_FREEBSD
#include <stdlib.h> // malloc()
#else
#include <malloc/malloc.h>
#endif
#define FAKE_INSTRUMENTS 0
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
CF_PRIVATE void __CFOAInitializeNSObject(void); // from NSObject.m
bool __CFOASafe = false;
void (*__CFObjectAllocRecordAllocationFunction)(int, void *, int64_t , uint64_t, const char *) = NULL;
void (*__CFObjectAllocSetLastAllocEventNameFunction)(void *, const char *) = NULL;
void __CFOAInitialize(void) {
}
void __CFRecordAllocationEvent(int eventnum, void *ptr, int64_t size, uint64_t data, const char *classname) {
if (!__CFOASafe || !__CFObjectAllocRecordAllocationFunction) return;
__CFObjectAllocRecordAllocationFunction(eventnum, ptr, size, data, classname);
}
void __CFSetLastAllocationEventName(void *ptr, const char *classname) {
if (!__CFOASafe || !__CFObjectAllocSetLastAllocEventNameFunction) return;
__CFObjectAllocSetLastAllocEventNameFunction(ptr, classname);
}
#elif FAKE_INSTRUMENTS
CF_EXPORT bool __CFOASafe = true;
void __CFOAInitialize(void) { }
void __CFRecordAllocationEvent(int eventnum, void *ptr, int64_t size, uint64_t data, const char *classname) {
if (!__CFOASafe) return;
if (!classname) classname = "(no class)";
const char *event = "unknown event";
switch (eventnum) {
case 21:
event = "zombie";
break;
case 13:
case __kCFReleaseEvent:
event = "release";
break;
case 12:
case __kCFRetainEvent:
event = "retain";
break;
}
fprintf(stdout, "event,%d,%s,%p,%ld,%lu,%s\n", eventnum, event, ptr, (long)size, (unsigned long)data, classname);
}
void __CFSetLastAllocationEventName(void *ptr, const char *classname) {
if (!__CFOASafe) return;
if (!classname) classname = "(no class)";
fprintf(stdout, "name,%p,%s\n", ptr, classname ? classname : "(no class)");
}
#else
bool __CFOASafe = false;
void __CFOAInitialize(void) { }
#endif
extern void __HALT(void);
#if !defined (__cplusplus)
static const CFRuntimeClass __CFNotATypeClass = {
0,
"Not A Type",
(void *)__HALT,
(void *)__HALT,
(void *)__HALT,
(void *)__HALT,
(void *)__HALT,
(void *)__HALT,
(void *)__HALT
};
static const CFRuntimeClass __CFTypeClass = {
0,
"CFType",
(void *)__HALT,
(void *)__HALT,
(void *)__HALT,
(void *)__HALT,
(void *)__HALT,
(void *)__HALT,
(void *)__HALT
};
#else
void SIG1(CFTypeRef){__HALT();};;
CFTypeRef SIG2(CFAllocatorRef,CFTypeRef){__HALT();return NULL;};
Boolean SIG3(CFTypeRef,CFTypeRef){__HALT();return FALSE;};
CFHashCode SIG4(CFTypeRef){__HALT(); return 0;};
CFStringRef SIG5(CFTypeRef,CFDictionaryRef){__HALT();return NULL;};
CFStringRef SIG6(CFTypeRef){__HALT();return NULL;};
static const CFRuntimeClass __CFNotATypeClass = {
0,
"Not A Type",
SIG1,
SIG2,
SIG1,
SIG3,
SIG4,
SIG5,
SIG6
};
static const CFRuntimeClass __CFTypeClass = {
0,
"CFType",
SIG1,
SIG2,
SIG1,
SIG3,
SIG4,
SIG5,
SIG6
};
#endif //__cplusplus
#if !__OBJC2__
//<rdar://problem/26305326> __attribute__((__cleanup__())) fails to link on 32 bit Mac
CF_PRIVATE void objc_terminate(void) {
abort();
}
#endif
// the lock does not protect most reading of these; we just leak the old table to allow read-only accesses to continue to work
static CFLock_t __CFBigRuntimeFunnel = CFLockInit;
static CFRuntimeClass const * __CFRuntimeClassTable[__CFRuntimeClassTableSize] __attribute__((aligned)) = {
[_kCFRuntimeIDNotAType] = &__CFNotATypeClass,
[_kCFRuntimeIDCFType] = &__CFTypeClass,
[_kCFRuntimeIDCFAllocator] = &__CFAllocatorClass,
[_kCFRuntimeIDCFBasicHash] = &__CFBasicHashClass,
[_kCFRuntimeIDCFBag] = &__CFBagClass,
[_kCFRuntimeIDCFString] = &__CFStringClass,
[_kCFRuntimeIDCFNull] = &__CFNullClass,
[_kCFRuntimeIDCFSet] = &__CFSetClass,
[_kCFRuntimeIDCFDictionary] = &__CFDictionaryClass,
[_kCFRuntimeIDCFArray] = &__CFArrayClass,
[_kCFRuntimeIDCFData] = &__CFDataClass,
[_kCFRuntimeIDCFBoolean] = &__CFBooleanClass,
[_kCFRuntimeIDCFNumber] = &__CFNumberClass,
[_kCFRuntimeIDCFBinaryHeap] = &__CFBinaryHeapClass,
[_kCFRuntimeIDCFBitVector] = &__CFBitVectorClass,
[_kCFRuntimeIDCFUUID] = &__CFUUIDClass,
[_kCFRuntimeIDCFStorage] = &__CFStorageClass,
[_kCFRuntimeIDCFTree] = &__CFTreeClass,
[_kCFRuntimeIDCFError] = &__CFErrorClass,
[_kCFRuntimeIDCFLocale] = &__CFLocaleClass,
[_kCFRuntimeIDCFDateFormatter] = &__CFDateFormatterClass,
[_kCFRuntimeIDCFNumberFormatter] = &__CFNumberFormatterClass,
[_kCFRuntimeIDCFCalendar] = &__CFCalendarClass,
[_kCFRuntimeIDCFDateIntervalFormatter] = &__CFDateIntervalFormatterClass,
[_kCFRuntimeIDCFDate] = &__CFDateClass,
[_kCFRuntimeIDCFTimeZone] = &__CFTimeZoneClass,
[_kCFRuntimeIDCFKeyedArchiverUID] = &__CFKeyedArchiverUIDClass,
#if TARGET_OS_OSX
[_kCFRuntimeIDCFXMLParser] = &__CFXMLParserClass,
[_kCFRuntimeIDCFXMLNode] = &__CFXMLNodeClass,
#endif // TARGET_OS_OSX
[_kCFRuntimeIDCFBundle] = &__CFBundleClass,
[_kCFRuntimeIDCFPFactory] = &__CFPFactoryClass,
[_kCFRuntimeIDCFPlugInInstance] = &__CFPlugInInstanceClass,
[_kCFRuntimeIDCFPreferencesDomain] = &__CFPreferencesDomainClass,
#if TARGET_OS_MAC
[_kCFRuntimeIDCFMachPort] = &__CFMachPortClass,
[_kCFRuntimeIDCFMessagePort] = &__CFMessagePortClass,
#endif
[_kCFRuntimeIDCFRunLoopMode] = &__CFRunLoopModeClass,
[_kCFRuntimeIDCFRunLoop] = &__CFRunLoopClass,
[_kCFRuntimeIDCFRunLoopSource] = &__CFRunLoopSourceClass,
[_kCFRuntimeIDCFRunLoopObserver] = &__CFRunLoopObserverClass,
[_kCFRuntimeIDCFRunLoopTimer] = &__CFRunLoopTimerClass,
[_kCFRuntimeIDCFSocket] = &__CFSocketClass,
[_kCFRuntimeIDCFReadStream] = &__CFReadStreamClass,
[_kCFRuntimeIDCFWriteStream] = &__CFWriteStreamClass,
[_kCFRuntimeIDCFAttributedString] = &__CFAttributedStringClass,
[_kCFRuntimeIDCFRunArray] = &__CFRunArrayClass,
[_kCFRuntimeIDCFCharacterSet] = &__CFCharacterSetClass,
[_kCFRuntimeIDCFURL] = &__CFURLClass,
[_kCFRuntimeIDCFURLComponents] = &__CFURLComponentsClass,
};
static int32_t __CFRuntimeClassTableCount = _kCFRuntimeStartingClassID;
uintptr_t __CFRuntimeObjCClassTable[__CFRuntimeClassTableSize] __attribute__((aligned)) = {0};
#if (TARGET_OS_MAC && !TARGET_OS_IPHONE && !__x86_64h__) // Match parity with private header
bool (*__CFObjCIsCollectable)(void *) = NULL;
#else
#endif
#if DEPLOYMENT_RUNTIME_SWIFT
// The constant string class reference is set at link time to _NSCFConstantString
void *__CFConstantStringClassReferencePtr = &_CF_CONSTANT_STRING_SWIFT_CLASS;
#else
#if !__CONSTANT_CFSTRINGS__ || DEPLOYMENT_TARGET_EMBEDDED_MINI
// Compiler uses this symbol name; must match compiler built-in decl, so we use 'int'
#if TARGET_RT_64_BIT
int __CFConstantStringClassReference[24] = {0};
#else
int __CFConstantStringClassReference[12] = {0};
#endif
#endif
#if TARGET_RT_64_BIT
int __CFConstantStringClassReference[24] = {0};
#else
int __CFConstantStringClassReference[12] = {0};
#endif
void *__CFConstantStringClassReferencePtr = NULL;
#endif
Boolean _CFIsObjC(CFTypeID typeID, void *obj) {
return CF_IS_OBJC(typeID, obj);
}
CFTypeID _CFRuntimeRegisterClass(const CFRuntimeClass * const cls) {
// NOTE: If you are adding a type to CF itself, please use a constant value (see CFRuntime_Internal.h)
// className must be pure ASCII string, non-null
if ((cls->version & _kCFRuntimeCustomRefCount) && !cls->refcount) {
CFLog(kCFLogLevelWarning, CFSTR("*** _CFRuntimeRegisterClass() given inconsistent class '%s'. Program will crash soon."), cls->className);
return _kCFRuntimeNotATypeID;
}
__CFLock(&__CFBigRuntimeFunnel);
if (__CFMaxRuntimeTypes <= __CFRuntimeClassTableCount) {
CFLog(kCFLogLevelWarning, CFSTR("*** CoreFoundation class table full; registration failing for class '%s'. Program will crash soon."), cls->className);
__CFUnlock(&__CFBigRuntimeFunnel);
return _kCFRuntimeNotATypeID;
}
if (__CFRuntimeClassTableSize <= __CFRuntimeClassTableCount) {
CFLog(kCFLogLevelWarning, CFSTR("*** CoreFoundation class table full; registration failing for class '%s'. Program will crash soon."), cls->className);
__CFUnlock(&__CFBigRuntimeFunnel);
return _kCFRuntimeNotATypeID;
}
__CFRuntimeClassTable[__CFRuntimeClassTableCount++] = (CFRuntimeClass *)cls;
CFTypeID typeID = __CFRuntimeClassTableCount - 1;
__CFUnlock(&__CFBigRuntimeFunnel);
return typeID;
}
void _CFRuntimeBridgeTypeToClass(CFTypeID cf_typeID, const void *cls_ref) {
__CFLock(&__CFBigRuntimeFunnel);
__CFRuntimeObjCClassTable[cf_typeID] = (uintptr_t)cls_ref;
__CFUnlock(&__CFBigRuntimeFunnel);
}
const CFRuntimeClass * _CFRuntimeGetClassWithTypeID(CFTypeID typeID) {
return __CFRuntimeClassTable[typeID]; // hopelessly unthreadsafe
}
void _CFRuntimeUnregisterClassWithTypeID(CFTypeID typeID) {
__CFLock(&__CFBigRuntimeFunnel);
__CFRuntimeClassTable[typeID] = NULL;
__CFUnlock(&__CFBigRuntimeFunnel);
}
#if defined(DEBUG) || defined(ENABLE_ZOMBIES)
uint8_t __CFZombieEnabled = 0;
uint8_t __CFDeallocateZombies = 0;
extern void __CFZombifyNSObject(void); // from NSObject.m
void _CFEnableZombies(void) {
}
#endif /* DEBUG */
/*
Layout of CF info field
3 2 1
1 4 6 7 0
| | | | |
rrrrrrrrCDX?ttttttttttttaIIIIIII
r = retain count
C = custom RC
D = deallocating
X = deallocated
t = type ID (12 bits, although only 10 are used because the class table size is 1024)
a = if set, use system default allocator
I = type-specific info bits (6 bits available)
On 64 bit, also includes 32 bits more of retain count from 32-63
*/
#if __CF_BIG_ENDIAN__
#define RC_INCREMENT (1ULL)
#define RC_CUSTOM_RC_BIT (0x800000ULL << 32)
#define RC_DEALLOCATING_BIT (0x400000ULL << 32)
#define RC_DEALLOCATED_BIT (0x200000ULL << 32)
#else
#define RC_INCREMENT (1ULL << 32)
#define RC_CUSTOM_RC_BIT (0x800000ULL)
#define RC_DEALLOCATING_BIT (0x400000ULL)
#define RC_DEALLOCATED_BIT (0x200000ULL)
#endif
#if TARGET_RT_64_BIT
#define HIGH_RC_START 32
#define HIGH_RC_END 63
#endif
#define LOW_RC_START 24
#define LOW_RC_END 31
#define TYPE_ID_START 8
#define TYPE_ID_END 17
CF_INLINE CFTypeID __CFTypeIDFromInfo(__CFInfoType info) {
// yes, 10 bits masked off, though 12 bits are there for the type field; __CFRuntimeClassTableSize is 1024
return (info & __CFInfoMask(TYPE_ID_END, TYPE_ID_START)) >> TYPE_ID_START;
}
/// Get the retain count from the low 32-bit field (the only one stored inline in 32 bit, and unused except for a marker in 64 bit)
CF_INLINE uint16_t __CFLowRCFromInfo(__CFInfoType info) {
return __CFBitfieldGetValue(info, LOW_RC_END, LOW_RC_START);
}
#if TARGET_RT_64_BIT
/// Get the retain count from the high 32-bit field (only present in 64 bit)
CF_INLINE uint32_t __CFHighRCFromInfo(__CFInfoType info) {
return __CFBitfield64GetValue(info, HIGH_RC_END, HIGH_RC_START);
}
#endif
CF_INLINE CFRuntimeBase *_cf_aligned_malloc(size_t align, CFIndex size, const char *className) {
CFRuntimeBase *memory;
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
memory = malloc_zone_memalign(malloc_default_zone(), align, size);
#elif DEPLOYMENT_TARGET_LINUX
int result = posix_memalign((void **)&memory, /*alignment*/ align, size);
int error = errno;
enum { errorStringBufferLength = 64 };
char errorStringBuffer[errorStringBufferLength] = "unknown error";
const char *errorStringPointer = errorStringBuffer;
//The GNU-specific version returns a pointer, which may or may not be the pointer passed in. The XSI version returns int. See strerror(3) on Linux.
#if ! ( (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && ! _GNU_SOURCE )
errorStringPointer =
#endif
strerror_r(errno, errorStringBuffer, errorStringBufferLength);
CFLog(kCFLogLevelWarning, CFSTR("*** _CFRuntimeCreateInstance() tried to allocate an instance of '%s', which requires %zu-byte alignment, but memory could not be so allocated: %s"), className, align, errorStringPointer);
#elif DEPLOYMENT_TARGET_WINDOWS
CFLog(kCFLogLevelWarning, CFSTR("*** _CFRuntimeCreateInstance() tried to allocate an instance of '%s', which requires %zu-byte alignment, but aligned memory is not supported on this platform"), className, align);
memory = (CFRuntimeBase *)malloc(size);
#else
CFLog(kCFLogLevelWarning, CFSTR("*** _CFRuntimeCreateInstance() tried to allocate an instance of '%s', which requires %zu-byte alignment, but aligned memory is not supported on this platform"), className, align);
memory = NULL;
#endif
return memory;
}
CFTypeRef _CFRuntimeCreateInstance(CFAllocatorRef allocator, CFTypeID typeID, CFIndex extraBytes, unsigned char *category) {
#if DEPLOYMENT_RUNTIME_SWIFT
// Under the Swift runtime, all CFTypeRefs are _NSCFTypes or a toll-free bridged type
extern void *swift_allocObject(uintptr_t metadata, size_t requiredSize, size_t requiredAlignmentMask);
uintptr_t isa = __CFRuntimeObjCClassTable[typeID];
CFIndex size = sizeof(CFRuntimeBase) + extraBytes;
const CFRuntimeClass *cls = __CFRuntimeClassTable[typeID];
size_t align = (cls->version & _kCFRuntimeRequiresAlignment) ? cls->requiredAlignment : 16;
CFRuntimeBase *memory = (CFRuntimeBase *)swift_allocObject(isa, size, align - 1);
// Zero the rest of the memory, starting at cfinfo
memset(&memory->_cfinfoa, 0, size - (sizeof(memory->_cfisa) + sizeof(memory->_swift_rc)));
// Set up the cfinfo struct
uint64_t *cfinfop = (uint64_t *)&(memory->_cfinfoa);
// The 0x80 means we use the default allocator
*cfinfop = ((typeID << 8) | (0x80));
return memory;
#else
if (__CFRuntimeClassTableSize <= typeID) HALT;
CFAssert1(typeID != _kCFRuntimeNotATypeID, __kCFLogAssertion, "%s(): Uninitialized type id", __PRETTY_FUNCTION__);
CFRuntimeClass const *cls = __CFRuntimeClassTable[typeID];
if (NULL == cls) {
return NULL;
}
if (cls->version & _kCFRuntimeRequiresAlignment) {
allocator = kCFAllocatorSystemDefault;
}
Boolean customRC = !!(cls->version & _kCFRuntimeCustomRefCount);
if (customRC && !cls->refcount) {
CFLog(kCFLogLevelWarning, CFSTR("*** _CFRuntimeCreateInstance() found inconsistent class '%s'."), cls->className);
return NULL;
}
CFAllocatorRef realAllocator = (NULL == allocator) ? __CFGetDefaultAllocator() : allocator;
if (kCFAllocatorNull == realAllocator) {
return NULL;
}
Boolean usesSystemDefaultAllocator = _CFAllocatorIsSystemDefault(realAllocator);
size_t align = (cls->version & _kCFRuntimeRequiresAlignment) ? cls->requiredAlignment : 16;
// To preserve 16 byte alignment when using custom allocators, we always place the CFAllocatorRef 16 bytes before the CFType. n.b. we assume sizeof(CFAllocatorRef) < 16
CFIndex size = sizeof(CFRuntimeBase) + extraBytes + (usesSystemDefaultAllocator ? 0 : 16);
size = (size + 0xF) & ~0xF; // CF objects are multiples of 16 in size
// CFType version 0 objects are unscanned by default since they don't have write-barriers and hard retain their innards
// CFType version 1 objects are scanned and use hand coded write-barriers to store collectable storage within
CFRuntimeBase *memory = NULL;
if (cls->version & _kCFRuntimeRequiresAlignment) {
memory = _cf_aligned_malloc(align, size, cls->className);
} else {
memory = (CFRuntimeBase *)CFAllocatorAllocate(allocator, size, 0);
}
if (NULL == memory) {
return NULL;
}
memset(memory, 0, size);
if (__CFOASafe && category) {
__CFSetLastAllocationEventName(memory, (char *)category);
} else if (__CFOASafe) {
__CFSetLastAllocationEventName(memory, (char *)cls->className);
}
if (!usesSystemDefaultAllocator) {
// add space to hold allocator ref for non-standard allocators.
// This means the allocator is 16 bytes before the result. See the line where we added 16 bytes above, when !usesSystemDefaultAllocator
*(CFAllocatorRef *)((char *)memory) = (CFAllocatorRef)CFRetain(realAllocator);
memory = (CFRuntimeBase *)((char *)memory + 16);
}
// No need for atomic operations here - memory is currently private to this thread
uint32_t typeIDMasked = (uint32_t)typeID << 8;
uint32_t usesDefaultAllocatorMasked = usesSystemDefaultAllocator ? 0x80 : 0x00;
#if TARGET_RT_64_BIT
if (customRC) {
// The top 32 bits of the word are all FF
// The rc bits in the lower 32 are 0xFF
memory->_cfinfoa = (uint64_t)((0xFFFFFFFFULL << 32) | ((uint32_t)(0xFF << 24) | RC_CUSTOM_RC_BIT | typeIDMasked | usesDefaultAllocatorMasked));
} else {
// The top 32 bits of the word start at 1
// The rc bits in the lower 32 are 0
memory->_cfinfoa = (uint64_t)((1ULL << 32) | typeIDMasked | usesDefaultAllocatorMasked);
}
#else
if (customRC) {
// The rc bits in the lower 32 are 0xFF
memory->_cfinfoa = (uint32_t)((0xFF << 24) | RC_CUSTOM_RC_BIT | typeIDMasked | usesDefaultAllocatorMasked);
} else {
// The rc bits in the lower 32 are 1
memory->_cfinfoa = (uint32_t)((1 << 24) | typeIDMasked | usesDefaultAllocatorMasked);
}
#endif
memory->_cfisa = __CFISAForTypeID(typeID);
if (NULL != cls->init) {
(cls->init)(memory);
}
return memory;
#endif
}
#if DEPLOYMENT_RUNTIME_SWIFT
#else
void _CFRuntimeInitStaticInstance(void *ptr, CFTypeID typeID) {
CFAssert1(typeID != _kCFRuntimeNotATypeID, __kCFLogAssertion, "%s(): Uninitialized type id", __PRETTY_FUNCTION__);
if (__CFRuntimeClassTableSize <= typeID) HALT;
CFRuntimeClass const *cfClass = __CFRuntimeClassTable[typeID];
Boolean customRC = !!(cfClass->version & _kCFRuntimeCustomRefCount);
if (customRC) {
CFLog(kCFLogLevelError, CFSTR("*** Cannot initialize a static instance to a class (%s) with custom ref counting"), cfClass->className);
return;
}
CFRuntimeBase *memory = (CFRuntimeBase *)ptr;
// No need for atomic operations here - memory is currently private to this thread
uint32_t typeIDMasked = (uint32_t)typeID << 8;
uint32_t usesDefaultAllocatorMasked = 0x80;
#if TARGET_RT_64_BIT
if (customRC) {
// The top 32 bits of the word are the retain count
memory->_cfinfoa = (uint64_t)((0xFFFFFFFFULL << 32) | (uint32_t)((0xFF << 24) | RC_CUSTOM_RC_BIT | typeIDMasked | usesDefaultAllocatorMasked));
} else {
memory->_cfinfoa = (uint64_t)(typeIDMasked | usesDefaultAllocatorMasked);
}
#else
if (customRC) {
// Retain count is in cfinfo
memory->_cfinfoa = (uint32_t)((0xFF << 24) | RC_CUSTOM_RC_BIT | typeIDMasked | usesDefaultAllocatorMasked);
} else {
memory->_cfinfoa = (uint32_t)(typeIDMasked | usesDefaultAllocatorMasked);
}
#endif
memory->_cfisa = 0;
if (NULL != cfClass->init) {
(cfClass->init)(memory);
}
}
#endif
void _CFRuntimeSetInstanceTypeID(CFTypeRef cf, CFTypeID newTypeID) {
if (__CFRuntimeClassTableSize <= newTypeID) HALT;
__CFInfoType info = ((CFRuntimeBase *)cf)->_cfinfoa;
CFTypeID currTypeID = __CFTypeIDFromInfo(info);
CFRuntimeClass const *newcfClass = __CFRuntimeClassTable[newTypeID];
Boolean newCustomRC = (newcfClass->version & _kCFRuntimeCustomRefCount);
CFRuntimeClass const *currcfClass = __CFRuntimeClassTable[currTypeID];
Boolean currCustomRC = (currcfClass->version & _kCFRuntimeCustomRefCount);
if (currCustomRC || (0 != currTypeID && newCustomRC)) {
CFLog(kCFLogLevelError, CFSTR("*** Cannot change the CFTypeID of a %s to a %s due to custom ref counting"), currcfClass->className, newcfClass->className);
return;
}
// Going from current type ID of 0 to anything is allowed, but if
// the object has somehow already been retained and the transition
// is to a class doing custom ref counting, the ref count isn't
// transferred and there will probably be a crash later when the
// object is freed too early.
__CFRuntimeSetValue(cf, TYPE_ID_END, TYPE_ID_START, newTypeID);
}
CF_PRIVATE void _CFRuntimeSetInstanceTypeIDAndIsa(CFTypeRef cf, CFTypeID newTypeID) {
_CFRuntimeSetInstanceTypeID(cf, newTypeID);
#if DEPLOYMENT_RUNTIME_SWIFT
if (((CFRuntimeBase *)cf)->_cfisa != __CFISAForTypeID(newTypeID)) {
((CFSwiftRef)cf)->isa = (uintptr_t)__CFISAForTypeID(newTypeID);
}
#endif
}
#if !TARGET_RT_64_BIT
enum {
__kCFObjectRetainedEvent = 12,
__kCFObjectReleasedEvent = 13
};
#if DEPLOYMENT_TARGET_MACOSX
#define NUM_EXTERN_TABLES 8
#define EXTERN_TABLE_IDX(O) (((uintptr_t)(O) >> 8) & 0x7)
#else
#define NUM_EXTERN_TABLES 1
#define EXTERN_TABLE_IDX(O) 0
#endif
// we disguise pointers so that programs like 'leaks' forget about these references
#define DISGUISE(O) (~(uintptr_t)(O))
static struct {
CFLock_t lock;
CFBasicHashRef table;
// uint8_t padding[64 - sizeof(CFBasicHashRef) - sizeof(CFLock_t)];
} __NSRetainCounters[NUM_EXTERN_TABLES];
static uintptr_t __CFDoExternRefOperation(uintptr_t op, id obj) {
if (nil == obj) HALT;
uintptr_t idx = EXTERN_TABLE_IDX(obj);
uintptr_t disguised = DISGUISE(obj);
CFLock_t *lock = &__NSRetainCounters[idx].lock;
CFBasicHashRef table = __NSRetainCounters[idx].table;
uintptr_t count;
switch (op) {
case 300: // increment
case 350: // increment, no event
__CFLock(lock);
CFBasicHashAddValue(table, disguised, disguised);
__CFUnlock(lock);
if (__CFOASafe && op != 350) __CFRecordAllocationEvent(__kCFObjectRetainedEvent, obj, 0, 0, NULL);
return (uintptr_t)obj;
case 400: // decrement
if (__CFOASafe) __CFRecordAllocationEvent(__kCFObjectReleasedEvent, obj, 0, 0, NULL);
case 450: // decrement, no event
__CFLock(lock);
count = (uintptr_t)CFBasicHashRemoveValue(table, disguised);
__CFUnlock(lock);
return 0 == count;
case 500:
__CFLock(lock);
count = (uintptr_t)CFBasicHashGetCountOfKey(table, disguised);
__CFUnlock(lock);
return count;
}
return 0;
}
#endif
CF_EXPORT CFTypeID CFNumberGetTypeID(void);
CF_INLINE CFTypeID __CFGenericTypeID_inline(const void *cf) {
return __CFTypeIDFromInfo(atomic_load(&(((CFRuntimeBase *)cf)->_cfinfoa)));
}
CFTypeID __CFGenericTypeID(const void *cf) {
return __CFGenericTypeID_inline(cf);
}
CFTypeID CFTypeGetTypeID(void) {
return _kCFRuntimeIDCFType;
}
CF_PRIVATE void __CFGenericValidateType_(CFTypeRef cf, CFTypeID type, const char *func) {
#if DEPLOYMENT_RUNTIME_SWIFT
if (cf && CF_IS_SWIFT(type, (CFSwiftRef)cf)) return;
#endif
if (cf && CF_IS_OBJC(type, cf)) return;
CFAssert2((cf != NULL) && (NULL != __CFRuntimeClassTable[__CFGenericTypeID_inline(cf)]) && (_kCFRuntimeIDNotAType != __CFGenericTypeID_inline(cf)) && (_kCFRuntimeIDCFType != __CFGenericTypeID_inline(cf)), __kCFLogAssertion, "%s(): pointer %p is not a CF object", func, cf); \
CFAssert3(__CFGenericTypeID_inline(cf) == type, __kCFLogAssertion, "%s(): pointer %p is not a %s", func, cf, __CFRuntimeClassTable[type]->className); \
}
#define __CFGenericAssertIsCF(cf) \
CFAssert2(cf != NULL && (NULL != __CFRuntimeClassTable[__CFGenericTypeID_inline(cf)]) && (_kCFRuntimeIDNotAType != __CFGenericTypeID_inline(cf)) && (_kCFRuntimeIDCFType != __CFGenericTypeID_inline(cf)), __kCFLogAssertion, "%s(): pointer %p is not a CF object", __PRETTY_FUNCTION__, cf);
#if DEPLOYMENT_RUNTIME_SWIFT
CF_INLINE Boolean CFTYPE_IS_SWIFT(const void *obj) {
CFTypeID typeID = __CFGenericTypeID_inline(obj);
return CF_IS_SWIFT(typeID, obj);
}
#define CFTYPE_SWIFT_FUNCDISPATCH0(rettype, obj, fn) \
if (CFTYPE_IS_SWIFT(obj)) return (rettype)__CFSwiftBridge.fn((CFSwiftRef)obj);
#define CFTYPE_SWIFT_FUNCDISPATCH1(rettype, obj, fn, a1) \
if (CFTYPE_IS_SWIFT(obj)) return (rettype)__CFSwiftBridge.fn((CFSwiftRef)obj, a1);
#else
#define CFTYPE_IS_SWIFT(obj) (0)
#define CFTYPE_SWIFT_FUNCDISPATCH0(rettype, obj, fn) do {} while(0)
#define CFTYPE_SWIFT_FUNCDISPATCH1(rettype, obj, fn, a1) do {} while (0)
#endif
#define CFTYPE_IS_OBJC(obj) (false)
#define CFTYPE_OBJC_FUNCDISPATCH0(rettype, obj, sel) do {} while (0)
#define CFTYPE_OBJC_FUNCDISPATCH1(rettype, obj, sel, a1) do {} while (0)
CFTypeID CFGetTypeID(CFTypeRef cf) {
#if defined(DEBUG)
if (NULL == cf) { CRSetCrashLogMessage("*** CFGetTypeID() called with NULL ***"); HALT; }
#endif
CFTYPE_OBJC_FUNCDISPATCH0(CFTypeID, cf, _cfTypeID);
CFTYPE_SWIFT_FUNCDISPATCH0(CFTypeID, cf, NSObject._cfTypeID);
__CFGenericAssertIsCF(cf);
return __CFGenericTypeID_inline(cf);
}
CFStringRef CFCopyTypeIDDescription(CFTypeID type) {
CFAssert2((NULL != __CFRuntimeClassTable[type]) && _kCFRuntimeIDNotAType != type && _kCFRuntimeIDCFType != type, __kCFLogAssertion, "%s(): type %lu is not a CF type ID", __PRETTY_FUNCTION__, type);
return CFStringCreateWithCString(kCFAllocatorSystemDefault, __CFRuntimeClassTable[type]->className, kCFStringEncodingASCII);
}
// Bit 31 (highest bit) in second word of cf instance indicates external ref count
static CFTypeRef _CFRetain(CFTypeRef cf, Boolean tryR);
CFTypeRef _CFNonObjCRetain(CFTypeRef cf) {
__CFGenericAssertIsCF(cf);
return _CFRetain(cf, false);
}
CFTypeRef CFRetain(CFTypeRef cf) {
if (NULL == cf) { CRSetCrashLogMessage("*** CFRetain() called with NULL ***"); HALT; }
if (cf) __CFGenericAssertIsCF(cf);
return _CFRetain(cf, false);
}
CFTypeRef CFAutorelease(CFTypeRef __attribute__((cf_consumed)) cf) {
if (NULL == cf) { CRSetCrashLogMessage("*** CFAutorelease() called with NULL ***"); HALT; }
return cf;
}
static void _CFRelease(CFTypeRef CF_RELEASES_ARGUMENT cf);
void _CFNonObjCRelease(CFTypeRef cf) {
__CFGenericAssertIsCF(cf);
_CFRelease(cf);
}
void CFRelease(CFTypeRef cf) {
if (NULL == cf) { CRSetCrashLogMessage("*** CFRelease() called with NULL ***"); HALT; }
if (cf) __CFGenericAssertIsCF(cf);
_CFRelease(cf);
}
CF_PRIVATE void __CFAllocatorDeallocate(CFTypeRef cf);
CF_PRIVATE const void *__CFStringCollectionCopy(CFAllocatorRef allocator, const void *ptr) {
if (NULL == ptr) { CRSetCrashLogMessage("*** __CFStringCollectionCopy() called with NULL ***"); HALT; }
CFStringRef theString = (CFStringRef)ptr;
CFStringRef result = CFStringCreateCopy((allocator), theString);
return (const void *)result;
}
extern void CFCollection_non_gc_storage_error(void);
CF_PRIVATE const void *__CFTypeCollectionRetain(CFAllocatorRef allocator, const void *ptr) {
if (NULL == ptr) { CRSetCrashLogMessage("*** __CFTypeCollectionRetain() called with NULL; likely a collection has been corrupted ***"); HALT; }
CFTypeRef cf = (CFTypeRef)ptr;
return CFRetain(cf);
}
CF_PRIVATE void __CFTypeCollectionRelease(CFAllocatorRef allocator, const void *ptr) {
if (NULL == ptr) { CRSetCrashLogMessage("*** __CFTypeCollectionRelease() called with NULL; likely a collection has been corrupted ***"); HALT; }
CFTypeRef cf = (CFTypeRef)ptr;
CFRelease(cf);
}
#if !TARGET_RT_64_BIT
static CFLock_t __CFRuntimeExternRefCountTableLock = CFLockInit;
#endif
#if DEPLOYMENT_RUNTIME_SWIFT
// using CFGetRetainCount is very dangerous; there is no real reason to use it in the swift version of CF.
#else
static uint64_t __CFGetFullRetainCount(CFTypeRef cf) {
if (NULL == cf) { CRSetCrashLogMessage("*** __CFGetFullRetainCount() called with NULL ***"); HALT; }
#if TARGET_RT64_BIT
__CFInfoType info = atomic_load(&(((CFRuntimeBase *)cf)->_cfinfoa));
uint32_t rc = __CFHighRCFromInfo(info);
if (0 == rc) {
return (uint64_t)0x0fffffffffffffffULL;
}
return rc;
#else
__CFInfoType info = atomic_load(&(((CFRuntimeBase *)cf)->_cfinfoa));
uint32_t lowBits = __CFLowRCFromInfo(info);
if (0 == lowBits) {
return (uint64_t)0x0fffffffffffffffULL;
}
uint64_t highBits = 0;
if ((lowBits & 0x80) != 0) {
highBits = __CFDoExternRefOperation(500, (id)cf);
}
uint64_t compositeRC = (lowBits & 0x7f) + (highBits << 6);
return compositeRC;
#endif
}
CF_PRIVATE Boolean __CFRuntimeIsConstant(CFTypeRef cf) {
__CFInfoType info = atomic_load(&(((CFRuntimeBase *)cf)->_cfinfoa));
uint32_t rc;
#if TARGET_RT_64_BIT
rc = __CFHighRCFromInfo(info);
#else
rc = __CFLowRCFromInfo(info);
#endif
return rc == 0;
}
/// This is for use during initialization only.
CF_PRIVATE void __CFRuntimeSetRC(CFTypeRef cf, uint32_t rc) {
// No real need for atomics or CAS here, memory is private to thread so far
__CFInfoType info = ((CFRuntimeBase *)cf)->_cfinfoa;
#if TARGET_RT_64_BIT
__CFBitfield64SetValue(info, HIGH_RC_END, HIGH_RC_START, rc);
#else
__CFBitfieldSetValue(info, LOW_RC_END, LOW_RC_START, rc);
#endif
((CFRuntimeBase *)cf)->_cfinfoa = info;
}
CFIndex CFGetRetainCount(CFTypeRef cf) {
if (NULL == cf) { CRSetCrashLogMessage("*** CFGetRetainCount() called with NULL ***"); HALT; }
__CFInfoType info = atomic_load(&(((CFRuntimeBase *)cf)->_cfinfoa));
if (info & RC_CUSTOM_RC_BIT) { // custom ref counting for object
CFTypeID typeID = __CFTypeIDFromInfo(info);
CFRuntimeClass const *cfClass = __CFRuntimeClassTable[typeID];
uint32_t (*refcount)(intptr_t, CFTypeRef) = cfClass->refcount;
if (!refcount || !(cfClass->version & _kCFRuntimeCustomRefCount) || __CFLowRCFromInfo(info) != 0xFF) {
HALT; // bogus object
}
#if TARGET_RT_64_BIT
if (__CFHighRCFromInfo(info) != 0xFFFFFFFFU) {
CRSetCrashLogMessage("Detected bogus CFTypeRef");
HALT; // bogus object
}
#endif
uint32_t rc = refcount(0, cf);
#if TARGET_RT_64_BIT
return (CFIndex)rc;
#else
return (rc < LONG_MAX) ? (CFIndex)rc : (CFIndex)LONG_MAX;
#endif
}
uint64_t rc = __CFGetFullRetainCount(cf);
return (rc < (uint64_t)LONG_MAX) ? (CFIndex)rc : (CFIndex)LONG_MAX;
}
#endif
// Even though we no longer support GC, leave implementations of these functions in for compatibility.
CFTypeRef CFMakeCollectable(CFTypeRef cf) {
return cf;
}
CFTypeRef CFMakeUncollectable(CFTypeRef cf) {
return cf;
}
Boolean _CFNonObjCEqual(CFTypeRef cf1, CFTypeRef cf2) {
//cf1 is guaranteed to be non-NULL and non-ObjC, cf2 is unknown
if (cf1 == cf2) return true;
if (NULL == cf2) { CRSetCrashLogMessage("*** CFEqual() called with NULL second argument ***"); HALT; }
CFTYPE_OBJC_FUNCDISPATCH1(Boolean, cf2, isEqual:, cf1);
CFTYPE_SWIFT_FUNCDISPATCH1(Boolean, cf2, NSObject.isEqual, (CFSwiftRef)cf1);
__CFGenericAssertIsCF(cf1);
__CFGenericAssertIsCF(cf2);
if (__CFGenericTypeID_inline(cf1) != __CFGenericTypeID_inline(cf2)) return false;
if (NULL != __CFRuntimeClassTable[__CFGenericTypeID_inline(cf1)]->equal) {
return __CFRuntimeClassTable[__CFGenericTypeID_inline(cf1)]->equal(cf1, cf2);
}
return false;
}
Boolean CFEqual(CFTypeRef cf1, CFTypeRef cf2) {
if (NULL == cf1) { CRSetCrashLogMessage("*** CFEqual() called with NULL first argument ***"); HALT; }
if (cf1 == cf2) return true;
if (NULL == cf2) { CRSetCrashLogMessage("*** CFEqual() called with NULL second argument ***"); HALT; }
CFTYPE_OBJC_FUNCDISPATCH1(Boolean, cf1, isEqual:, cf2);
CFTYPE_OBJC_FUNCDISPATCH1(Boolean, cf2, isEqual:, cf1);
CFTYPE_SWIFT_FUNCDISPATCH1(Boolean, cf1, NSObject.isEqual, (CFSwiftRef)cf2);
CFTYPE_SWIFT_FUNCDISPATCH1(Boolean, cf2, NSObject.isEqual, (CFSwiftRef)cf1);
__CFGenericAssertIsCF(cf1);
__CFGenericAssertIsCF(cf2);
if (__CFGenericTypeID_inline(cf1) != __CFGenericTypeID_inline(cf2)) return false;
if (NULL != __CFRuntimeClassTable[__CFGenericTypeID_inline(cf1)]->equal) {
return __CFRuntimeClassTable[__CFGenericTypeID_inline(cf1)]->equal(cf1, cf2);
}
return false;
}
CFHashCode _CFNonObjCHash(CFTypeRef cf) {
__CFGenericAssertIsCF(cf);
CFHashCode (*hash)(CFTypeRef cf) = __CFRuntimeClassTable[__CFGenericTypeID_inline(cf)]->hash;
if (NULL != hash) {
return hash(cf);
}
return (CFHashCode)cf;
}
CFHashCode CFHash(CFTypeRef cf) {
if (NULL == cf) { CRSetCrashLogMessage("*** CFHash() called with NULL ***"); HALT; }
CFTYPE_OBJC_FUNCDISPATCH0(CFHashCode, cf, hash);
CFTYPE_SWIFT_FUNCDISPATCH0(CFHashCode, cf, NSObject.hash);
__CFGenericAssertIsCF(cf);
CFHashCode (*hash)(CFTypeRef cf) = __CFRuntimeClassTable[__CFGenericTypeID_inline(cf)]->hash;
if (NULL != hash) {
return hash(cf);
}
return (CFHashCode)cf;
}
// definition: produces a normally non-NULL debugging description of the object
CFStringRef CFCopyDescription(CFTypeRef cf) {
if (NULL == cf) return NULL;
// CFTYPE_OBJC_FUNCDISPATCH0(CFStringRef, cf, _copyDescription); // XXX returns 0 refcounted item under GC
__CFGenericAssertIsCF(cf);
if (NULL != __CFRuntimeClassTable[__CFGenericTypeID_inline(cf)]->copyDebugDesc) {
CFStringRef result = __CFRuntimeClassTable[__CFGenericTypeID_inline(cf)]->copyDebugDesc(cf);
if (NULL != result) return result;
}
return CFStringCreateWithFormat(kCFAllocatorSystemDefault, NULL, CFSTR("<%s %p [%p]>"), __CFRuntimeClassTable[__CFGenericTypeID_inline(cf)]->className, cf, CFGetAllocator(cf));
}
// Definition: if type produces a formatting description, return that string, otherwise NULL
CF_PRIVATE CFStringRef __CFCopyFormattingDescription(CFTypeRef cf, CFDictionaryRef formatOptions) {
if (NULL == cf) return NULL;
__CFGenericAssertIsCF(cf);
if (NULL != __CFRuntimeClassTable[__CFGenericTypeID_inline(cf)]->copyFormattingDesc) {
return __CFRuntimeClassTable[__CFGenericTypeID_inline(cf)]->copyFormattingDesc(cf, formatOptions);
}
return NULL;
}
extern CFAllocatorRef __CFAllocatorGetAllocator(CFTypeRef);
CFAllocatorRef CFGetAllocator(CFTypeRef cf) {
if (NULL == cf) return kCFAllocatorSystemDefault;
if (_kCFRuntimeIDCFAllocator == __CFGenericTypeID_inline(cf)) {
return __CFAllocatorGetAllocator(cf);
}
return __CFGetAllocator(cf);
}
extern CFTypeID CFBinaryHeapGetTypeID(void);
extern CFTypeID CFBitVectorGetTypeID(void);
extern CFTypeID CFTreeGetTypeID(void);
extern CFTypeID CFPlugInInstanceGetTypeID(void);
extern CFTypeID CFStringTokenizerGetTypeID(void);
extern CFTypeID CFStorageGetTypeID(void);
#if TARGET_OS_LINUX || (TARGET_OS_MAC && !DEPLOYMENT_RUNTIME_OBJC)
CF_PRIVATE void __CFTSDInitialize(void);
#endif
#if DEPLOYMENT_TARGET_WINDOWS
// From CFPlatform.c
CF_PRIVATE void __CFTSDWindowsCleanup(void);
CF_PRIVATE void __CFFinalizeWindowsThreadData();
#endif
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || DEPLOYMENT_TARGET_EMBEDDED_MINI
_Atomic(uint8_t) __CF120290 = false;
static _Atomic(uint8_t) __CF120291 = false;
_Atomic(uint8_t) __CF120293 = false;
char * __crashreporter_info__ = NULL; // Keep this symbol, since it was exported and other things may be linking against it, like GraphicsServices.framework on iOS
__asm(".desc ___crashreporter_info__, 0x10");
static void __01121__(void) {
__CF120291 = pthread_is_threaded_np() ? true : false;
}
static void __01123__(void) {
// Ideally, child-side atfork handlers should be async-cancel-safe, as fork()
// is async-cancel-safe and can be called from signal handlers. See also
// http://standards.ieee.org/reading/ieee/interp/1003-1c-95_int/pasc-1003.1c-37.html
// This is not a problem for CF.
if (__CF120290) {
__CF120293 = true;
#if DEPLOYMENT_TARGET_MACOSX
if (__CF120291) {
CRSetCrashLogMessage2("*** multi-threaded process forked ***");
} else {
CRSetCrashLogMessage2("*** single-threaded process forked ***");
}
#endif
}
}