X-Git-Url: https://git.saurik.com/apple/libdispatch.git/blobdiff_plain/e85f44377864e428703fb21503e29f422c11288f..refs/heads/master:/src/internal.h?ds=inline diff --git a/src/internal.h b/src/internal.h index 24d3a04..286e534 100644 --- a/src/internal.h +++ b/src/internal.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2008-2011 Apple Inc. All rights reserved. + * Copyright (c) 2008-2013 Apple Inc. All rights reserved. * * @APPLE_APACHE_LICENSE_HEADER_START@ * @@ -27,35 +27,170 @@ #ifndef __DISPATCH_INTERNAL__ #define __DISPATCH_INTERNAL__ +#if __has_include() +#include +#else #include +#endif #define __DISPATCH_BUILDING_DISPATCH__ #define __DISPATCH_INDIRECT__ +#ifdef __APPLE__ +#include +#include +#include + +#ifndef TARGET_OS_MAC_DESKTOP +#define TARGET_OS_MAC_DESKTOP (TARGET_OS_MAC && \ + !TARGET_OS_SIMULATOR && !TARGET_OS_IPHONE && !TARGET_OS_EMBEDDED) +#endif + +#if TARGET_OS_MAC_DESKTOP +# define DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(x) \ + (__MAC_OS_X_VERSION_MIN_REQUIRED >= (x)) +# if !DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(101200) +# error "OS X hosts older than OS X 10.12 aren't supported anymore" +# endif // !DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(101200) +#elif TARGET_OS_SIMULATOR +# define DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(x) \ + (IPHONE_SIMULATOR_HOST_MIN_VERSION_REQUIRED >= (x)) +# if !DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(101200) +# error "Simulator hosts older than OS X 10.12 aren't supported anymore" +# endif // !DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(101200) +#else +# define DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(x) 1 +# if __IPHONE_OS_VERSION_MIN_REQUIRED < 90000 +# error "iOS hosts older than iOS 9.0 aren't supported anymore" +# endif +#endif + +#else // !__APPLE__ +#define DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(x) 0 +#endif // !__APPLE__ + + +#if !defined(DISPATCH_MACH_SPI) && TARGET_OS_MAC +#define DISPATCH_MACH_SPI 1 +#endif +#if !defined(OS_VOUCHER_CREATION_SPI) && TARGET_OS_MAC +#define OS_VOUCHER_CREATION_SPI 1 +#endif +#if !defined(OS_VOUCHER_ACTIVITY_SPI) && TARGET_OS_MAC +#define OS_VOUCHER_ACTIVITY_SPI 1 +#endif +#if !defined(OS_VOUCHER_ACTIVITY_GENERATE_SWAPS) +#define OS_VOUCHER_ACTIVITY_GENERATE_SWAPS 0 +#endif +#if !defined(OS_FIREHOSE_SPI) && TARGET_OS_MAC +#define OS_FIREHOSE_SPI 1 +#endif +#if !defined(DISPATCH_LAYOUT_SPI) && TARGET_OS_MAC +#define DISPATCH_LAYOUT_SPI 1 +#endif + +#if __has_include() +#include +#if !defined(HAVE_DYLD_IS_MEMORY_IMMUTABLE) +#if defined(DYLD_MACOSX_VERSION_10_12) || defined(DYLD_IOS_VERSION_10_0) +#define HAVE_DYLD_IS_MEMORY_IMMUTABLE 1 +#else +#define HAVE_DYLD_IS_MEMORY_IMMUTABLE 0 +#endif +#endif // !defined(HAVE_DYLD_IS_MEMORY_IMMUTABLE) +#endif // __has_include() + +#if !defined(USE_OBJC) && HAVE_OBJC +#define USE_OBJC 1 +#endif + +#if USE_OBJC +#define OS_OBJECT_HAVE_OBJC_SUPPORT 1 +#if defined(__OBJC__) +#define OS_OBJECT_USE_OBJC 1 +// Force internal Objective-C sources to use class-visible headers +// even when not compiling in Swift. +#define OS_OBJECT_SWIFT3 1 +#else +#define OS_OBJECT_USE_OBJC 0 +#endif // __OBJC__ +#else +#define OS_OBJECT_HAVE_OBJC_SUPPORT 0 +#endif // USE_OBJC #include #include +#define __DISPATCH_HIDE_SYMBOL(sym, version) \ + __asm__(".section __TEXT,__const\n\t" \ + ".globl $ld$hide$os" #version "$_" #sym "\n\t" \ + "$ld$hide$os" #version "$_" #sym ":\n\t" \ + " .byte 0\n\t" \ + ".previous") + + +#ifndef DISPATCH_HIDE_SYMBOL +#if TARGET_OS_MAC && !TARGET_OS_IPHONE +#define DISPATCH_HIDE_SYMBOL(sym, osx, ios, tvos, watchos) \ + __DISPATCH_HIDE_SYMBOL(sym, osx) +#else +#define DISPATCH_HIDE_SYMBOL(sym, osx, ios, tvos, watchos) +#endif +#endif +#include #include -#include #include +#include +#include #include #include #include #include #include +#if !TARGET_OS_WIN32 #include +#endif -/* private.h uses #include_next and must be included last to avoid picking - * up installed headers. */ +#if defined(__OBJC__) || defined(__cplusplus) +#define DISPATCH_PURE_C 0 +#else +#define DISPATCH_PURE_C 1 +#endif + +/* private.h must be included last to avoid picking up installed headers. */ +#include +#include "os/object_private.h" #include "queue_private.h" #include "source_private.h" +#include "mach_private.h" +#include "data_private.h" +#include "os/voucher_private.h" +#include "os/voucher_activity_private.h" +#if !TARGET_OS_WIN32 +#include "io_private.h" +#endif +#include "layout_private.h" #include "benchmark.h" #include "private.h" +/* SPI for Libsystem-internal use */ +DISPATCH_EXPORT DISPATCH_NOTHROW void libdispatch_init(void); +#if !TARGET_OS_WIN32 +DISPATCH_EXPORT DISPATCH_NOTHROW void dispatch_atfork_prepare(void); +DISPATCH_EXPORT DISPATCH_NOTHROW void dispatch_atfork_parent(void); +DISPATCH_EXPORT DISPATCH_NOTHROW void dispatch_atfork_child(void); +#endif + /* More #includes at EOF (dependent on the contents of internal.h) ... */ +// Abort on uncaught exceptions thrown from client callouts rdar://8577499 +#if !defined(DISPATCH_USE_CLIENT_CALLOUT) +#define DISPATCH_USE_CLIENT_CALLOUT 1 +#endif + +#define DISPATCH_ALLOW_NON_LEAF_RETARGET 1 + /* The "_debug" library build */ #ifndef DISPATCH_DEBUG #define DISPATCH_DEBUG 0 @@ -65,12 +200,18 @@ #define DISPATCH_PROFILE 0 #endif -#if DISPATCH_DEBUG && !defined(DISPATCH_USE_CLIENT_CALLOUT) -#define DISPATCH_USE_CLIENT_CALLOUT 1 +#if (!TARGET_OS_EMBEDDED || DISPATCH_DEBUG || DISPATCH_PROFILE) && \ + !defined(DISPATCH_USE_DTRACE) +#define DISPATCH_USE_DTRACE 1 #endif -#if (DISPATCH_DEBUG || DISPATCH_PROFILE) && !defined(DISPATCH_USE_DTRACE) -#define DISPATCH_USE_DTRACE 1 +#if DISPATCH_USE_DTRACE && (DISPATCH_INTROSPECTION || DISPATCH_DEBUG || \ + DISPATCH_PROFILE) && !defined(DISPATCH_USE_DTRACE_INTROSPECTION) +#define DISPATCH_USE_DTRACE_INTROSPECTION 1 +#endif + +#ifndef DISPATCH_DEBUG_QOS +#define DISPATCH_DEBUG_QOS DISPATCH_DEBUG #endif #if HAVE_LIBKERN_OSCROSSENDIAN_H @@ -92,29 +233,46 @@ #include #include #include +#include #include #include +#include +#include #endif /* HAVE_MACH */ #if HAVE_MALLOC_MALLOC_H #include #endif -#include + +#include + +#if !TARGET_OS_WIN32 #include #include -#include +#ifdef __ANDROID__ +#include +#else #include +#endif /* __ANDROID__ */ #include #include +#include #include +#endif #ifdef __BLOCKS__ +#if __has_include() #include +#else +#include "BlocksRuntime/Block_private.h" +#endif // __has_include() #include #endif /* __BLOCKS__ */ #include #include +#if HAVE_FCNTL_H #include +#endif #include #include #if USE_POSIX_SEM @@ -127,33 +285,57 @@ #include #include #include -#include #if HAVE_UNISTD_H #include #endif -#ifndef __has_builtin -#define __has_builtin(x) 0 -#endif -#ifndef __has_include -#define __has_include(x) 0 -#endif -#ifndef __has_feature -#define __has_feature(x) 0 -#endif -#ifndef __has_attribute -#define __has_attribute(x) 0 -#endif - +#if __GNUC__ #define DISPATCH_NOINLINE __attribute__((__noinline__)) #define DISPATCH_USED __attribute__((__used__)) #define DISPATCH_UNUSED __attribute__((__unused__)) #define DISPATCH_WEAK __attribute__((__weak__)) +#define DISPATCH_OVERLOADABLE __attribute__((__overloadable__)) +#define DISPATCH_PACKED __attribute__((__packed__)) #if DISPATCH_DEBUG #define DISPATCH_ALWAYS_INLINE_NDEBUG #else #define DISPATCH_ALWAYS_INLINE_NDEBUG __attribute__((__always_inline__)) #endif +#else /* __GNUC__ */ +#define DISPATCH_NOINLINE +#define DISPATCH_USED +#define DISPATCH_UNUSED +#define DISPATCH_WEAK +#define DISPATCH_ALWAYS_INLINE_NDEBUG +#endif /* __GNUC__ */ + +#define DISPATCH_CONCAT(x,y) DISPATCH_CONCAT1(x,y) +#define DISPATCH_CONCAT1(x,y) x ## y + +#define DISPATCH_COUNT_ARGS(...) DISPATCH_COUNT_ARGS1(, ## __VA_ARGS__, \ + _8, _7, _6, _5, _4, _3, _2, _1, _0) +#define DISPATCH_COUNT_ARGS1(z, a, b, c, d, e, f, g, h, cnt, ...) cnt + +#if BYTE_ORDER == LITTLE_ENDIAN +#define DISPATCH_STRUCT_LE_2(a, b) struct { a; b; } +#define DISPATCH_STRUCT_LE_3(a, b, c) struct { a; b; c; } +#define DISPATCH_STRUCT_LE_4(a, b, c, d) struct { a; b; c; d; } +#else +#define DISPATCH_STRUCT_LE_2(a, b) struct { b; a; } +#define DISPATCH_STRUCT_LE_3(a, b, c) struct { c; b; a; } +#define DISPATCH_STRUCT_LE_4(a, b, c, d) struct { d; c; b; a; } +#endif +#if __has_feature(c_startic_assert) +#define DISPATCH_UNION_ASSERT(alias, st) \ + _Static_assert(sizeof(struct { alias; }) == sizeof(st), "bogus union"); +#else +#define DISPATCH_UNION_ASSERT(alias, st) +#endif +#define DISPATCH_UNION_LE(alias, ...) \ + DISPATCH_UNION_ASSERT(alias, DISPATCH_CONCAT(DISPATCH_STRUCT_LE, \ + DISPATCH_COUNT_ARGS(__VA_ARGS__))(__VA_ARGS__)) \ + union { alias; DISPATCH_CONCAT(DISPATCH_STRUCT_LE, \ + DISPATCH_COUNT_ARGS(__VA_ARGS__))(__VA_ARGS__); } // workaround 6368156 #ifdef NSEC_PER_SEC @@ -170,48 +352,151 @@ #define NSEC_PER_USEC 1000ull /* I wish we had __builtin_expect_range() */ -#define fastpath(x) ((typeof(x))__builtin_expect((long)(x), ~0l)) -#define slowpath(x) ((typeof(x))__builtin_expect((long)(x), 0l)) +#if __GNUC__ +#define _safe_cast_to_long(x) \ + ({ _Static_assert(sizeof(typeof(x)) <= sizeof(long), \ + "__builtin_expect doesn't support types wider than long"); \ + (long)(x); }) +#define fastpath(x) ((typeof(x))__builtin_expect(_safe_cast_to_long(x), ~0l)) +#define slowpath(x) ((typeof(x))__builtin_expect(_safe_cast_to_long(x), 0l)) +#define likely(x) __builtin_expect(!!(x), 1) +#define unlikely(x) __builtin_expect(!!(x), 0) +#else +#define fastpath(x) (x) +#define slowpath(x) (x) +#define likely(x) (!!(x)) +#define unlikely(x) (!!(x)) +#endif // __GNUC__ -DISPATCH_NOINLINE +#define _TAILQ_IS_ENQUEUED(elm, field) \ + ((elm)->field.tqe_prev != NULL) +#define _TAILQ_MARK_NOT_ENQUEUED(elm, field) \ + do { (elm)->field.tqe_prev = NULL; } while (0) + +#if DISPATCH_DEBUG +// sys/queue.h debugging +#if defined(__linux__) +#define QUEUE_MACRO_DEBUG 1 +#else +#undef TRASHIT +#define TRASHIT(x) do {(x) = (void *)-1;} while (0) +#endif +#endif // DISPATCH_DEBUG +#define _TAILQ_TRASH_ENTRY(elm, field) do { \ + TRASHIT((elm)->field.tqe_next); \ + TRASHIT((elm)->field.tqe_prev); \ + } while (0) +#define _TAILQ_TRASH_HEAD(head) do { \ + TRASHIT((head)->tqh_first); \ + TRASHIT((head)->tqh_last); \ + } while (0) + +DISPATCH_EXPORT DISPATCH_NOINLINE void _dispatch_bug(size_t line, long val); + +DISPATCH_NOINLINE +void _dispatch_bug_client(const char* msg); +#if HAVE_MACH DISPATCH_NOINLINE void _dispatch_bug_mach_client(const char *msg, mach_msg_return_t kr); +#endif // HAVE_MACH +DISPATCH_NOINLINE +void _dispatch_bug_kevent_client(const char* msg, const char* filter, + const char *operation, int err); + +DISPATCH_NOINLINE +void _dispatch_bug_deprecated(const char *msg); + DISPATCH_NOINLINE DISPATCH_NORETURN void _dispatch_abort(size_t line, long val); -DISPATCH_NOINLINE __attribute__((__format__(printf,1,2))) + +#if !defined(DISPATCH_USE_OS_DEBUG_LOG) && DISPATCH_DEBUG +#if __has_include() +#define DISPATCH_USE_OS_DEBUG_LOG 1 +#include +#endif +#endif // DISPATCH_USE_OS_DEBUG_LOG + +#if !defined(DISPATCH_USE_SIMPLE_ASL) && !DISPATCH_USE_OS_DEBUG_LOG +#if __has_include(<_simple.h>) +#define DISPATCH_USE_SIMPLE_ASL 1 +#include <_simple.h> +#endif +#endif // DISPATCH_USE_SIMPLE_ASL + +#if !DISPATCH_USE_SIMPLE_ASL && !DISPATCH_USE_OS_DEBUG_LOG && !TARGET_OS_WIN32 +#include +#endif + +#if DISPATCH_USE_OS_DEBUG_LOG +#define _dispatch_log(msg, ...) os_debug_log("libdispatch", msg, ## __VA_ARGS__) +#else +DISPATCH_EXPORT DISPATCH_NOINLINE __attribute__((__format__(__printf__,1,2))) void _dispatch_log(const char *msg, ...); -DISPATCH_NOINLINE __attribute__((__format__(printf,1,0))) -void _dispatch_logv(const char *msg, va_list); +#endif // DISPATCH_USE_OS_DEBUG_LOG + +#define dsnprintf(buf, siz, ...) \ + ({ size_t _siz = siz; int _r = snprintf(buf, _siz, __VA_ARGS__); \ + _r < 0 ? 0u : ((size_t)_r > _siz ? _siz : (size_t)_r); }) + +#if __GNUC__ +#define dispatch_static_assert(e) ({ \ + char __compile_time_assert__[(bool)(e) ? 1 : -1] DISPATCH_UNUSED; \ + }) +#else +#define dispatch_static_assert(e) +#endif + +#define DISPATCH_BAD_INPUT ((void *_Nonnull)0) +#define DISPATCH_OUT_OF_MEMORY ((void *_Nonnull)0) /* * For reporting bugs within libdispatch when using the "_debug" version of the * library. */ +#if __APPLE__ #define dispatch_assert(e) do { \ if (__builtin_constant_p(e)) { \ - char __compile_time_assert__[(bool)(e) ? 1 : -1] DISPATCH_UNUSED; \ + dispatch_static_assert(e); \ } else { \ - typeof(e) _e = fastpath(e); /* always eval 'e' */ \ - if (DISPATCH_DEBUG && !_e) { \ + typeof(e) _e = (e); /* always eval 'e' */ \ + if (unlikely(DISPATCH_DEBUG && !_e)) { \ _dispatch_abort(__LINE__, (long)_e); \ } \ } \ } while (0) +#else +static inline void +_dispatch_assert(long e, size_t line) +{ + if (DISPATCH_DEBUG && !e) _dispatch_abort(line, e); +} +#define dispatch_assert(e) _dispatch_assert((long)(e), __LINE__) +#endif /* __GNUC__ */ + +#if __APPLE__ /* * A lot of API return zero upon success and not-zero on fail. Let's capture * and log the non-zero value */ #define dispatch_assert_zero(e) do { \ if (__builtin_constant_p(e)) { \ - char __compile_time_assert__[(bool)(e) ? -1 : 1] DISPATCH_UNUSED; \ + dispatch_static_assert(e); \ } else { \ - typeof(e) _e = slowpath(e); /* always eval 'e' */ \ - if (DISPATCH_DEBUG && _e) { \ + typeof(e) _e = (e); /* always eval 'e' */ \ + if (unlikely(DISPATCH_DEBUG && _e)) { \ _dispatch_abort(__LINE__, (long)_e); \ } \ } \ } while (0) +#else +static inline void +_dispatch_assert_zero(long e, size_t line) +{ + if (DISPATCH_DEBUG && e) _dispatch_abort(line, e); +} +#define dispatch_assert_zero(e) _dispatch_assert_zero((long)(e), __LINE__) +#endif /* __GNUC__ */ /* * For reporting bugs or impedance mismatches between libdispatch and external @@ -219,185 +504,371 @@ void _dispatch_logv(const char *msg, va_list); * * In particular, we wrap all system-calls with assume() macros. */ +#if __GNUC__ #define dispatch_assume(e) ({ \ - typeof(e) _e = fastpath(e); /* always eval 'e' */ \ - if (!_e) { \ + typeof(e) _e = (e); /* always eval 'e' */ \ + if (unlikely(!_e)) { \ if (__builtin_constant_p(e)) { \ - char __compile_time_assert__[(bool)(e) ? 1 : -1]; \ - (void)__compile_time_assert__; \ + dispatch_static_assert(e); \ } \ _dispatch_bug(__LINE__, (long)_e); \ } \ _e; \ }) +#else +static inline long +_dispatch_assume(long e, long line) +{ + if (!e) _dispatch_bug(line, e); + return e; +} +#define dispatch_assume(e) _dispatch_assume((long)(e), __LINE__) +#endif /* __GNUC__ */ + /* * A lot of API return zero upon success and not-zero on fail. Let's capture * and log the non-zero value */ +#if __GNUC__ #define dispatch_assume_zero(e) ({ \ - typeof(e) _e = slowpath(e); /* always eval 'e' */ \ - if (_e) { \ + typeof(e) _e = (e); /* always eval 'e' */ \ + if (unlikely(_e)) { \ if (__builtin_constant_p(e)) { \ - char __compile_time_assert__[(bool)(e) ? -1 : 1]; \ - (void)__compile_time_assert__; \ + dispatch_static_assert(e); \ } \ _dispatch_bug(__LINE__, (long)_e); \ } \ _e; \ }) +#else +static inline long +_dispatch_assume_zero(long e, long line) +{ + if (e) _dispatch_bug(line, e); + return e; +} +#define dispatch_assume_zero(e) _dispatch_assume_zero((long)(e), __LINE__) +#endif /* __GNUC__ */ /* * For reporting bugs in clients when using the "_debug" version of the library. */ +#if __GNUC__ #define dispatch_debug_assert(e, msg, args...) do { \ if (__builtin_constant_p(e)) { \ - char __compile_time_assert__[(bool)(e) ? 1 : -1] DISPATCH_UNUSED; \ + dispatch_static_assert(e); \ } else { \ - typeof(e) _e = fastpath(e); /* always eval 'e' */ \ - if (DISPATCH_DEBUG && !_e) { \ + typeof(e) _e = (e); /* always eval 'e' */ \ + if (unlikely(DISPATCH_DEBUG && !_e)) { \ _dispatch_log("%s() 0x%lx: " msg, __func__, (long)_e, ##args); \ abort(); \ } \ } \ } while (0) +#else +#define dispatch_debug_assert(e, msg, args...) do { \ + typeof(e) _e = (e); /* always eval 'e' */ \ + if (unlikely(DISPATCH_DEBUG && !_e)) { \ + _dispatch_log("%s() 0x%lx: " msg, __FUNCTION__, _e, ##args); \ + abort(); \ + } \ +} while (0) +#endif /* __GNUC__ */ /* Make sure the debug statments don't get too stale */ -#define _dispatch_debug(x, args...) \ -({ \ +#define _dispatch_debug(x, args...) do { \ if (DISPATCH_DEBUG) { \ - _dispatch_log("libdispatch: %u\t%p\t" x, __LINE__, \ + _dispatch_log("%u\t%p\t" x, __LINE__, \ (void *)_dispatch_thread_self(), ##args); \ } \ -}) +} while (0) #if DISPATCH_DEBUG -#if HAVE_MACH -DISPATCH_NOINLINE DISPATCH_USED -void dispatch_debug_machport(mach_port_t name, const char* str); -#endif -DISPATCH_NOINLINE DISPATCH_USED -void dispatch_debug_kevents(struct kevent* kev, size_t count, const char* str); +/* This is the private version of the deprecated dispatch_debug() */ +DISPATCH_NONNULL2 DISPATCH_NOTHROW +__attribute__((__format__(printf,2,3))) +void +_dispatch_object_debug(dispatch_object_t object, const char *message, ...); #else -static inline void -dispatch_debug_kevents(struct kevent* kev DISPATCH_UNUSED, - size_t count DISPATCH_UNUSED, - const char* str DISPATCH_UNUSED) {} +#define _dispatch_object_debug(object, message, ...) +#endif // DISPATCH_DEBUG + +#ifdef __BLOCKS__ +#define _dispatch_Block_invoke(bb) \ + ((dispatch_function_t)((struct Block_layout *)bb)->invoke) +void *_dispatch_Block_copy(void *block); +#if __GNUC__ +#define _dispatch_Block_copy(x) ((typeof(x))_dispatch_Block_copy(x)) #endif +void _dispatch_call_block_and_release(void *block); +#endif /* __BLOCKS__ */ -#if DISPATCH_USE_CLIENT_CALLOUT +void _dispatch_temporary_resource_shortage(void); +void *_dispatch_calloc(size_t num_items, size_t size); +const char *_dispatch_strdup_if_mutable(const char *str); +void _dispatch_vtable_init(void); +char *_dispatch_get_build(void); +int _dispatch_sigmask(void); -DISPATCH_NOTHROW void -_dispatch_client_callout(void *ctxt, dispatch_function_t f); -DISPATCH_NOTHROW void -_dispatch_client_callout2(void *ctxt, size_t i, void (*f)(void *, size_t)); +uint64_t _dispatch_timeout(dispatch_time_t when); +uint64_t _dispatch_time_nanoseconds_since_epoch(dispatch_time_t when); -#else +#define _DISPATCH_UNSAFE_FORK_MULTITHREADED ((uint8_t)1) +#define _DISPATCH_UNSAFE_FORK_PROHIBIT ((uint8_t)2) +extern uint8_t _dispatch_unsafe_fork; +extern bool _dispatch_child_of_unsafe_fork; +void _dispatch_fork_becomes_unsafe_slow(void); -DISPATCH_ALWAYS_INLINE -static inline void -_dispatch_client_callout(void *ctxt, dispatch_function_t f) -{ - return f(ctxt); -} +#define _dispatch_is_multithreaded_inline() \ + ((_dispatch_unsafe_fork & _DISPATCH_UNSAFE_FORK_MULTITHREADED) != 0) DISPATCH_ALWAYS_INLINE static inline void -_dispatch_client_callout2(void *ctxt, size_t i, void (*f)(void *, size_t)) +_dispatch_fork_becomes_unsafe(void) { - return f(ctxt, i); + if (unlikely(!_dispatch_is_multithreaded_inline())) { + _dispatch_fork_becomes_unsafe_slow(); + DISPATCH_COMPILER_CAN_ASSUME(_dispatch_is_multithreaded_inline()); + } } +#if DISPATCH_INTROSPECTION +#undef DISPATCH_PERF_MON +#define DISPATCH_PERF_MON 0 #endif -#ifdef __BLOCKS__ -DISPATCH_ALWAYS_INLINE -static inline void -_dispatch_client_callout_block(dispatch_block_t b) -{ - struct Block_basic *bb = (void*)b; - return _dispatch_client_callout(b, (dispatch_function_t)bb->Block_invoke); -} +/* #includes dependent on internal.h */ +#include "shims.h" +#include "event/event_internal.h" -dispatch_block_t _dispatch_Block_copy(dispatch_block_t block); -#define _dispatch_Block_copy(x) ((typeof(x))_dispatch_Block_copy(x)) -void _dispatch_call_block_and_release(void *block); -#endif /* __BLOCKS__ */ +// Older Mac OS X and iOS Simulator fallbacks -void dummy_function(void); -long dummy_function_r0(void); +#if HAVE__PTHREAD_WORKQUEUE_INIT && PTHREAD_WORKQUEUE_SPI_VERSION >= 20140213 \ + && !defined(HAVE_PTHREAD_WORKQUEUE_QOS) +#define HAVE_PTHREAD_WORKQUEUE_QOS 1 +#endif +#if HAVE__PTHREAD_WORKQUEUE_INIT && PTHREAD_WORKQUEUE_SPI_VERSION >= 20150304 \ + && !defined(HAVE_PTHREAD_WORKQUEUE_KEVENT) +#define HAVE_PTHREAD_WORKQUEUE_KEVENT 1 +#endif -void _dispatch_source_drain_kevent(struct kevent *); -long _dispatch_update_kq(const struct kevent *); -void _dispatch_run_timers(void); -// Returns howsoon with updated time value, or NULL if no timers active. -struct timespec *_dispatch_get_next_timer_fire(struct timespec *howsoon); +#ifndef HAVE_PTHREAD_WORKQUEUE_NARROWING +#if !DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(109900) +#define HAVE_PTHREAD_WORKQUEUE_NARROWING 0 +#else +#define HAVE_PTHREAD_WORKQUEUE_NARROWING 1 +#endif +#endif -bool _dispatch_source_testcancel(dispatch_source_t); +#ifdef EVFILT_MEMORYSTATUS +#ifndef DISPATCH_USE_MEMORYSTATUS +#define DISPATCH_USE_MEMORYSTATUS 1 +#endif +#endif // EVFILT_MEMORYSTATUS + +#if TARGET_OS_SIMULATOR +#undef DISPATCH_USE_MEMORYPRESSURE_SOURCE +#define DISPATCH_USE_MEMORYPRESSURE_SOURCE 0 +#endif // TARGET_OS_SIMULATOR +#if !defined(DISPATCH_USE_MEMORYPRESSURE_SOURCE) && DISPATCH_USE_MEMORYSTATUS +#define DISPATCH_USE_MEMORYPRESSURE_SOURCE 1 +#endif +#if DISPATCH_USE_MEMORYPRESSURE_SOURCE +#if __has_include() +#include +#else +extern void malloc_memory_event_handler(unsigned long); +#endif // __has_include( +#include +#ifndef DISPATCH_USE_IMPORTANCE_ASSERTION +#define DISPATCH_USE_IMPORTANCE_ASSERTION 1 #endif -#endif // HAVE_MACH +#endif // HAVE_LIBPROC_INTERNAL_H -#ifdef EVFILT_VM -#if TARGET_IPHONE_SIMULATOR && __MAC_OS_X_VERSION_MIN_REQUIRED < 1070 -#undef DISPATCH_USE_MALLOC_VM_PRESSURE_SOURCE -#define DISPATCH_USE_MALLOC_VM_PRESSURE_SOURCE 0 +#if HAVE_SYS_GUARDED_H +#include +#ifndef DISPATCH_USE_GUARDED_FD +#define DISPATCH_USE_GUARDED_FD 1 #endif -#ifndef DISPATCH_USE_VM_PRESSURE -#define DISPATCH_USE_VM_PRESSURE 1 +#endif // HAVE_SYS_GUARDED_H + + +#if DISPATCH_USE_DTRACE || DISPATCH_USE_DTRACE_INTROSPECTION +typedef struct dispatch_trace_timer_params_s { + int64_t deadline, interval, leeway; +} *dispatch_trace_timer_params_t; + +#include "provider.h" +#endif // DISPATCH_USE_DTRACE || DISPATCH_USE_DTRACE_INTROSPECTION + +#if __has_include() +#include +#ifndef DBG_DISPATCH +#define DBG_DISPATCH 46 #endif -#ifndef DISPATCH_USE_MALLOC_VM_PRESSURE_SOURCE -#define DISPATCH_USE_MALLOC_VM_PRESSURE_SOURCE 1 +#ifndef KDBG_CODE +#define KDBG_CODE(...) 0 +#define DBG_FUNC_START 0 +#define DBG_FUNC_END 0 +#endif +#define DISPATCH_CODE(subclass, code) \ + KDBG_CODE(DBG_DISPATCH, DISPATCH_TRACE_SUBCLASS_##subclass, code) +#define DISPATCH_CODE_START(subclass, code) \ + (DISPATCH_CODE(subclass, code) | DBG_FUNC_START) +#define DISPATCH_CODE_END(subclass, code) \ + (DISPATCH_CODE(subclass, code) | DBG_FUNC_END) +#ifdef ARIADNEDBG_CODE +#define ARIADNE_ENTER_DISPATCH_MAIN_CODE ARIADNEDBG_CODE(220, 2) +#else +#define ARIADNE_ENTER_DISPATCH_MAIN_CODE 0 +#endif +#if !defined(DISPATCH_USE_VOUCHER_KDEBUG_TRACE) && \ + (DISPATCH_INTROSPECTION || DISPATCH_PROFILE || DISPATCH_DEBUG) +#define DISPATCH_USE_VOUCHER_KDEBUG_TRACE 1 #endif -#endif // EVFILT_VM -#if defined(F_SETNOSIGPIPE) && defined(F_GETNOSIGPIPE) -#if TARGET_IPHONE_SIMULATOR && __MAC_OS_X_VERSION_MIN_REQUIRED < 1070 -#undef DISPATCH_USE_SETNOSIGPIPE -#define DISPATCH_USE_SETNOSIGPIPE 0 +#define DISPATCH_TRACE_SUBCLASS_DEFAULT 0 +#define DISPATCH_TRACE_SUBCLASS_VOUCHER 1 +#define DISPATCH_TRACE_SUBCLASS_PERF 2 +#define DISPATCH_TRACE_SUBCLASS_MACH_MSG 3 +#define DISPATCH_TRACE_SUBCLASS_PERF_MON 4 + +#define DISPATCH_PERF_non_leaf_retarget DISPATCH_CODE(PERF, 1) +#define DISPATCH_PERF_post_activate_retarget DISPATCH_CODE(PERF, 2) +#define DISPATCH_PERF_post_activate_mutation DISPATCH_CODE(PERF, 3) +#define DISPATCH_PERF_delayed_registration DISPATCH_CODE(PERF, 4) +#define DISPATCH_PERF_mutable_target DISPATCH_CODE(PERF, 5) +#define DISPATCH_PERF_strict_bg_timer DISPATCH_CODE(PERF, 6) + +#define DISPATCH_MACH_MSG_hdr_move DISPATCH_CODE(MACH_MSG, 1) + +#define DISPATCH_PERF_MON_worker_thread_start DISPATCH_CODE_START(PERF_MON, 1) +#define DISPATCH_PERF_MON_worker_thread_end DISPATCH_CODE_END(PERF_MON, 1) +#define DISPATCH_PERF_MON_worker_useless DISPATCH_CODE(PERF_MON, 2) + +DISPATCH_ALWAYS_INLINE +static inline void +_dispatch_ktrace_impl(uint32_t code, uint64_t a, uint64_t b, + uint64_t c, uint64_t d) +{ + if (!code) return; +#ifdef _COMM_PAGE_KDEBUG_ENABLE + if (likely(*(volatile uint32_t *)_COMM_PAGE_KDEBUG_ENABLE == 0)) return; #endif -#ifndef DISPATCH_USE_SETNOSIGPIPE -#define DISPATCH_USE_SETNOSIGPIPE 1 + kdebug_trace(code, a, b, c, d); +} +#define _dispatch_cast_to_uint64(e) \ + __builtin_choose_expr(sizeof(e) > 4, \ + ((uint64_t)(e)), ((uint64_t)(uintptr_t)(e))) +#define _dispatch_ktrace(code, a, b, c, d) _dispatch_ktrace_impl(code, \ + _dispatch_cast_to_uint64(a), _dispatch_cast_to_uint64(b), \ + _dispatch_cast_to_uint64(c), _dispatch_cast_to_uint64(d)) + +#else // __has_include() +#define DISPATCH_CODE(subclass, code) 0 +#define ARIADNE_ENTER_DISPATCH_MAIN_CODE 0 +#define DISPATCH_USE_VOUCHER_KDEBUG_TRACE 0 +#define _dispatch_ktrace(code, a, b, c, d) +#endif // !__has_include() +#define _dispatch_ktrace4(code, a, b, c, d) _dispatch_ktrace(code, a, b, c, d) +#define _dispatch_ktrace3(code, a, b, c) _dispatch_ktrace(code, a, b, c, 0) +#define _dispatch_ktrace2(code, a, b) _dispatch_ktrace(code, a, b, 0, 0) +#define _dispatch_ktrace1(code, a) _dispatch_ktrace(code, a, 0, 0, 0) +#define _dispatch_ktrace0(code) _dispatch_ktrace(code, 0, 0, 0, 0) + +#ifndef MACH_MSGH_BITS_VOUCHER_MASK +#define MACH_MSGH_BITS_VOUCHER_MASK 0x001f0000 +#define MACH_MSGH_BITS_SET_PORTS(remote, local, voucher) \ + (((remote) & MACH_MSGH_BITS_REMOTE_MASK) | \ + (((local) << 8) & MACH_MSGH_BITS_LOCAL_MASK) | \ + (((voucher) << 16) & MACH_MSGH_BITS_VOUCHER_MASK)) +#define MACH_MSGH_BITS_VOUCHER(bits) \ + (((bits) & MACH_MSGH_BITS_VOUCHER_MASK) >> 16) +#define MACH_MSGH_BITS_HAS_VOUCHER(bits) \ + (MACH_MSGH_BITS_VOUCHER(bits) != MACH_MSGH_BITS_ZERO) +#define msgh_voucher_port msgh_reserved +#define mach_voucher_t mach_port_t +#define MACH_VOUCHER_NULL MACH_PORT_NULL +#define MACH_SEND_INVALID_VOUCHER 0x10000005 +#endif + +#ifndef VOUCHER_USE_MACH_VOUCHER +#if __has_include() +#define VOUCHER_USE_MACH_VOUCHER 1 +#endif +#endif // VOUCHER_USE_MACH_VOUCHER + +#ifndef VOUCHER_USE_EMPTY_MACH_BASE_VOUCHER +#if RDAR_24272659 // FIXME: +#define VOUCHER_USE_EMPTY_MACH_BASE_VOUCHER 1 +#else // RDAR_24272659 +#define VOUCHER_USE_EMPTY_MACH_BASE_VOUCHER 0 +#endif // RDAR_24272659 #endif -#endif // F_SETNOSIGPIPE +#ifndef VOUCHER_USE_PERSONA +#if VOUCHER_USE_MACH_VOUCHER && defined(BANK_PERSONA_TOKEN) && \ + TARGET_OS_IOS && !TARGET_OS_SIMULATOR +#define VOUCHER_USE_PERSONA 1 +#else +#define VOUCHER_USE_PERSONA 0 +#endif +#endif // VOUCHER_USE_PERSONA + +#if VOUCHER_USE_MACH_VOUCHER +#undef DISPATCH_USE_IMPORTANCE_ASSERTION +#define DISPATCH_USE_IMPORTANCE_ASSERTION 0 +#else +#undef MACH_RCV_VOUCHER +#define MACH_RCV_VOUCHER 0 +#define VOUCHER_USE_PERSONA 0 +#endif // VOUCHER_USE_MACH_VOUCHER -#define _dispatch_set_crash_log_message(x) +#define _dispatch_hardware_crash() \ + __asm__(""); __builtin_trap() // + +#define _dispatch_set_crash_log_cause_and_message(ac, msg) ((void)(ac)) +#define _dispatch_set_crash_log_message(msg) +#define _dispatch_set_crash_log_message_dynamic(msg) #if HAVE_MACH // MIG_REPLY_MISMATCH means either: @@ -406,20 +877,98 @@ extern struct _dispatch_hw_config_s { // 2) A hand crafted call to mach_msg*() screwed up. Use MIG. #define DISPATCH_VERIFY_MIG(x) do { \ if ((x) == MIG_REPLY_MISMATCH) { \ - _dispatch_set_crash_log_message("MIG_REPLY_MISMATCH"); \ + _dispatch_set_crash_log_cause_and_message((x), \ + "MIG_REPLY_MISMATCH"); \ _dispatch_hardware_crash(); \ } \ } while (0) #endif -#define DISPATCH_CRASH(x) do { \ - _dispatch_set_crash_log_message("BUG IN LIBDISPATCH: " x); \ +#define DISPATCH_INTERNAL_CRASH(c, x) do { \ + _dispatch_set_crash_log_cause_and_message((c), \ + "BUG IN LIBDISPATCH: " x); \ _dispatch_hardware_crash(); \ } while (0) -#define DISPATCH_CLIENT_CRASH(x) do { \ - _dispatch_set_crash_log_message("BUG IN CLIENT OF LIBDISPATCH: " x); \ +#define DISPATCH_CLIENT_CRASH(c, x) do { \ + _dispatch_set_crash_log_cause_and_message((c), \ + "BUG IN CLIENT OF LIBDISPATCH: " x); \ _dispatch_hardware_crash(); \ } while (0) +#define _OS_OBJECT_CLIENT_CRASH(x) do { \ + _dispatch_set_crash_log_message("API MISUSE: " x); \ + _dispatch_hardware_crash(); \ + } while (0) + +#define DISPATCH_ASSERTION_FAILED_MESSAGE \ + "BUG IN CLIENT OF LIBDISPATCH: Assertion failed: " + +#define _dispatch_assert_crash(msg) do { \ + const char *__msg = (msg); \ + _dispatch_log("%s", __msg); \ + _dispatch_set_crash_log_message_dynamic(__msg); \ + _dispatch_hardware_crash(); \ + } while (0) + +#define _dispatch_client_assert_fail(fmt, ...) do { \ + char *_msg = NULL; \ + asprintf(&_msg, "%s" fmt, DISPATCH_ASSERTION_FAILED_MESSAGE, \ + ##__VA_ARGS__); \ + _dispatch_assert_crash(_msg); \ + free(_msg); \ + } while (0) + +#define DISPATCH_NO_VOUCHER ((voucher_t)(void*)~0ul) +#define DISPATCH_NO_PRIORITY ((pthread_priority_t)~0ul) +DISPATCH_ENUM(dispatch_thread_set_self, unsigned long, + DISPATCH_PRIORITY_ENFORCE = 0x1, + DISPATCH_VOUCHER_REPLACE = 0x2, + DISPATCH_VOUCHER_CONSUME = 0x4, + DISPATCH_THREAD_PARK = 0x8, +); +DISPATCH_WARN_RESULT +static inline voucher_t _dispatch_adopt_priority_and_set_voucher( + pthread_priority_t priority, voucher_t voucher, + dispatch_thread_set_self_t flags); +#if HAVE_MACH +mach_port_t _dispatch_get_mach_host_port(void); +#endif + +#if HAVE_PTHREAD_WORKQUEUE_QOS +#if DISPATCH_DEBUG +extern int _dispatch_set_qos_class_enabled; +#else +#define _dispatch_set_qos_class_enabled (1) +#endif +#endif // HAVE_PTHREAD_WORKQUEUE_QOS +#if DISPATCH_USE_KEVENT_WORKQUEUE +#if !HAVE_PTHREAD_WORKQUEUE_QOS || !EV_UDATA_SPECIFIC +#error Invalid build configuration +#endif +#if DISPATCH_USE_MGR_THREAD +extern int _dispatch_kevent_workqueue_enabled; +#else +#define _dispatch_kevent_workqueue_enabled (1) +#endif +#else +#define _dispatch_kevent_workqueue_enabled (0) +#endif // DISPATCH_USE_KEVENT_WORKQUEUE + + +/* #includes dependent on internal.h */ +#include "object_internal.h" +#include "semaphore_internal.h" +#include "introspection_internal.h" +#include "queue_internal.h" +#include "source_internal.h" +#include "mach_internal.h" +#include "voucher_internal.h" +#include "data_internal.h" +#if !TARGET_OS_WIN32 +#include "io_internal.h" +#endif +#include "inline_internal.h" +#include "firehose/firehose_internal.h" + #endif /* __DISPATCH_INTERNAL__ */