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Diffstat (limited to 'lib/libthr/thread/thr_private.h')
| -rw-r--r-- | lib/libthr/thread/thr_private.h | 1117 |
1 files changed, 1117 insertions, 0 deletions
diff --git a/lib/libthr/thread/thr_private.h b/lib/libthr/thread/thr_private.h new file mode 100644 index 000000000000..d7b889930365 --- /dev/null +++ b/lib/libthr/thread/thr_private.h @@ -0,0 +1,1117 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (C) 2005 Daniel M. Eischen <deischen@freebsd.org> + * Copyright (c) 2005 David Xu <davidxu@freebsd.org> + * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>. + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice unmodified, this list of conditions, and the following + * disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _THR_PRIVATE_H +#define _THR_PRIVATE_H + +/* + * Include files. + */ +#include <sys/types.h> +#include <sys/time.h> +#include <sys/queue.h> +#include <sys/param.h> +#include <sys/cpuset.h> +#include <sys/exterrvar.h> +#include <machine/atomic.h> +#include <errno.h> +#include <limits.h> +#include <signal.h> +#include <stdbool.h> +#include <stddef.h> +#include <stdio.h> +#include <unistd.h> +#include <ucontext.h> +#include <sys/thr.h> +#include <pthread.h> + +__NULLABILITY_PRAGMA_PUSH + +#define SYM_FB10(sym) __CONCAT(sym, _fb10) +#define SYM_FBP10(sym) __CONCAT(sym, _fbp10) +#define WEAK_REF(sym, alias) __weak_reference(sym, alias) +#define SYM_COMPAT(sym, impl, ver) __sym_compat(sym, impl, ver) +#define SYM_DEFAULT(sym, impl, ver) __sym_default(sym, impl, ver) + +#define FB10_COMPAT(func, sym) \ + WEAK_REF(func, SYM_FB10(sym)); \ + SYM_COMPAT(sym, SYM_FB10(sym), FBSD_1.0) + +#define FB10_COMPAT_PRIVATE(func, sym) \ + WEAK_REF(func, SYM_FBP10(sym)); \ + SYM_DEFAULT(sym, SYM_FBP10(sym), FBSDprivate_1.0) + +struct pthread; +extern struct pthread *_thr_initial __hidden; + +#include "pthread_md.h" +#include "thr_umtx.h" +#include "thread_db.h" + +#ifdef _PTHREAD_FORCED_UNWIND +#define _BSD_SOURCE +#include <unwind.h> +#endif + +typedef TAILQ_HEAD(pthreadlist, pthread) pthreadlist; +typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head; +TAILQ_HEAD(mutex_queue, pthread_mutex); + +/* Signal to do cancellation */ +#define SIGCANCEL SIGTHR + +/* + * Kernel fatal error handler macro. + */ +#define PANIC(args...) _thread_exitf(__FILE__, __LINE__, ##args) + +/* Output debug messages like this: */ +#define stdout_debug(args...) _thread_printf(STDOUT_FILENO, ##args) +#define stderr_debug(args...) _thread_printf(STDERR_FILENO, ##args) + +#ifdef _PTHREADS_INVARIANTS +#define THR_ASSERT(cond, msg) do { \ + if (__predict_false(!(cond))) \ + PANIC(msg); \ +} while (0) +#else +#define THR_ASSERT(cond, msg) +#endif + +#ifdef PIC +# define STATIC_LIB_REQUIRE(name) +#else +# define STATIC_LIB_REQUIRE(name) __asm (".globl " #name) +#endif + +#define TIMESPEC_ADD(dst, src, val) \ + do { \ + (dst)->tv_sec = (src)->tv_sec + (val)->tv_sec; \ + (dst)->tv_nsec = (src)->tv_nsec + (val)->tv_nsec; \ + if ((dst)->tv_nsec >= 1000000000) { \ + (dst)->tv_sec++; \ + (dst)->tv_nsec -= 1000000000; \ + } \ + } while (0) + +#define TIMESPEC_SUB(dst, src, val) \ + do { \ + (dst)->tv_sec = (src)->tv_sec - (val)->tv_sec; \ + (dst)->tv_nsec = (src)->tv_nsec - (val)->tv_nsec; \ + if ((dst)->tv_nsec < 0) { \ + (dst)->tv_sec--; \ + (dst)->tv_nsec += 1000000000; \ + } \ + } while (0) + +/* Magic cookie set for shared pthread locks and cv's pointers */ +#define THR_PSHARED_PTR \ + ((void *)(uintptr_t)((1ULL << (NBBY * sizeof(long) - 1)) | 1)) + +/* XXX These values should be same as those defined in pthread.h */ +#define THR_MUTEX_INITIALIZER ((struct pthread_mutex *)NULL) +#define THR_ADAPTIVE_MUTEX_INITIALIZER ((struct pthread_mutex *)1) +#define THR_MUTEX_DESTROYED ((struct pthread_mutex *)2) +#define THR_COND_INITIALIZER ((struct pthread_cond *)NULL) +#define THR_COND_DESTROYED ((struct pthread_cond *)1) +#define THR_RWLOCK_INITIALIZER ((struct pthread_rwlock *)NULL) +#define THR_RWLOCK_DESTROYED ((struct pthread_rwlock *)1) + +#define PMUTEX_FLAG_TYPE_MASK 0x0ff +#define PMUTEX_FLAG_PRIVATE 0x100 +#define PMUTEX_FLAG_DEFERRED 0x200 +#define PMUTEX_TYPE(mtxflags) ((mtxflags) & PMUTEX_FLAG_TYPE_MASK) + +#define PMUTEX_OWNER_ID(m) ((m)->m_lock.m_owner & ~UMUTEX_CONTESTED) + +#define MAX_DEFER_WAITERS 50 + +/* + * Values for pthread_mutex m_ps indicator. + */ +#define PMUTEX_INITSTAGE_ALLOC 0 +#define PMUTEX_INITSTAGE_BUSY 1 +#define PMUTEX_INITSTAGE_DONE 2 + +struct pthread_mutex { + /* + * Lock for accesses to this structure. + */ + struct umutex m_lock; + int m_flags; + int m_count; + int m_spinloops; + int m_yieldloops; + int m_ps; /* pshared init stage */ + /* + * Link for all mutexes a thread currently owns, of the same + * prio type. + */ + TAILQ_ENTRY(pthread_mutex) m_qe; + /* Link for all private mutexes a thread currently owns. */ + TAILQ_ENTRY(pthread_mutex) m_pqe; + struct pthread_mutex *m_rb_prev; +}; + +struct pthread_mutex_attr { + enum pthread_mutextype m_type; + int m_protocol; + int m_ceiling; + int m_pshared; + int m_robust; +}; + +#define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \ + { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE, \ + PTHREAD_MUTEX_STALLED } + +struct pthread_cond { + __uint32_t __has_user_waiters; + struct ucond kcond; +}; + +struct pthread_cond_attr { + int c_pshared; + int c_clockid; +}; + +struct pthread_barrier { + struct umutex b_lock; + struct ucond b_cv; + int64_t b_cycle; + int b_count; + int b_waiters; + int b_refcount; + int b_destroying; +}; + +struct pthread_barrierattr { + int pshared; +}; + +struct pthread_spinlock { + struct umutex s_lock; +}; + +/* + * Flags for condition variables. + */ +#define COND_FLAGS_PRIVATE 0x01 +#define COND_FLAGS_INITED 0x02 +#define COND_FLAGS_BUSY 0x04 + +/* + * Cleanup definitions. + */ +struct pthread_cleanup { + struct pthread_cleanup *prev; + void (*routine)(void *); + void *routine_arg; + int onheap; +}; + +#define THR_CLEANUP_PUSH(td, func, arg) { \ + struct pthread_cleanup __cup; \ + \ + __cup.routine = func; \ + __cup.routine_arg = arg; \ + __cup.onheap = 0; \ + __cup.prev = (td)->cleanup; \ + (td)->cleanup = &__cup; + +#define THR_CLEANUP_POP(td, exec) \ + (td)->cleanup = __cup.prev; \ + if ((exec) != 0) \ + __cup.routine(__cup.routine_arg); \ +} + +struct pthread_atfork { + TAILQ_ENTRY(pthread_atfork) qe; + void (*prepare)(void); + void (*parent)(void); + void (*child)(void); +}; + +struct pthread_attr { + int sched_policy; + int sched_inherit; + int prio; + int suspend; +#define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */ + int flags; + void *stackaddr_attr; + size_t stacksize_attr; + size_t guardsize_attr; + cpuset_t *cpuset; + size_t cpusetsize; +}; + +struct wake_addr { + struct wake_addr *link; + unsigned int value; + char pad[12]; +}; + +struct sleepqueue { + TAILQ_HEAD(, pthread) sq_blocked; + SLIST_HEAD(, sleepqueue) sq_freeq; + LIST_ENTRY(sleepqueue) sq_hash; + SLIST_ENTRY(sleepqueue) sq_flink; + void *sq_wchan; + int sq_type; +}; + +/* + * Thread creation state attributes. + */ +#define THR_CREATE_RUNNING 0 +#define THR_CREATE_SUSPENDED 1 + +/* + * Miscellaneous definitions. + */ +#define THR_STACK_DEFAULT (sizeof(void *) / 4 * 1024 * 1024) + +/* + * Maximum size of initial thread's stack. This perhaps deserves to be larger + * than the stacks of other threads, since many applications are likely to run + * almost entirely on this stack. + */ +#define THR_STACK_INITIAL (THR_STACK_DEFAULT * 2) + +/* + * Define priorities returned by kernel. + */ +#define THR_MIN_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_min) +#define THR_MAX_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_max) +#define THR_DEF_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_default) + +#define THR_MIN_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_min) +#define THR_MAX_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_max) +#define THR_DEF_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_default) + +/* XXX The SCHED_FIFO should have same priority range as SCHED_RR */ +#define THR_MIN_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO_1].pri_min) +#define THR_MAX_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_max) +#define THR_DEF_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_default) + +struct pthread_prio { + int pri_min; + int pri_max; + int pri_default; +}; + +struct pthread_rwlockattr { + int pshared; +}; + +struct pthread_rwlock { + struct urwlock lock; + uint32_t owner; +}; + +/* + * Thread states. + */ +enum pthread_state { + PS_RUNNING, + PS_DEAD +}; + +struct pthread_specific_elem { + const void *data; + int seqno; +}; + +struct pthread_key { + volatile int allocated; + int seqno; + void (*destructor)(void *); +}; + +/* + * lwpid_t is 32bit but kernel thr API exports tid as long type + * to preserve the ABI for M:N model in very early date (r131431). + */ +#define TID(thread) ((uint32_t) ((thread)->tid)) + +/* + * Thread structure. + */ +struct pthread { +#define _pthread_startzero tid + /* Kernel thread id. */ + long tid; +#define TID_TERMINATED 1 + + /* + * Lock for accesses to this thread structure. + */ + struct umutex lock; + + /* Internal condition variable cycle number. */ + uint32_t cycle; + + /* How many low level locks the thread held. */ + int locklevel; + + /* + * Set to non-zero when this thread has entered a critical + * region. We allow for recursive entries into critical regions. + */ + int critical_count; + + /* Signal blocked counter. */ + int sigblock; + + /* Fast sigblock var. */ + uint32_t fsigblock; + + /* Queue entry for list of all threads. */ + TAILQ_ENTRY(pthread) tle; /* link for all threads in process */ + + /* Queue entry for GC lists. */ + TAILQ_ENTRY(pthread) gcle; + + /* Hash queue entry. */ + LIST_ENTRY(pthread) hle; + + /* Sleep queue entry */ + TAILQ_ENTRY(pthread) wle; + + /* Threads reference count. */ + int refcount; + + /* + * Thread start routine, argument, stack pointer and thread + * attributes. + */ + void *(*start_routine)(void *); + void *arg; + struct pthread_attr attr; + +#define SHOULD_CANCEL(thr) \ + ((thr)->cancel_pending && (thr)->cancel_enable && \ + (thr)->no_cancel == 0) + + /* Cancellation is enabled */ + int cancel_enable; + + /* Cancellation request is pending */ + int cancel_pending; + + /* Thread is at cancellation point */ + int cancel_point; + + /* Cancellation is temporarily disabled */ + int no_cancel; + + /* Asynchronouse cancellation is enabled */ + int cancel_async; + + /* Cancellation is in progress */ + int cancelling; + + /* Thread temporary signal mask. */ + sigset_t sigmask; + + /* Thread should unblock SIGCANCEL. */ + int unblock_sigcancel; + + /* In sigsuspend state */ + int in_sigsuspend; + + /* deferred signal info */ + siginfo_t deferred_siginfo; + + /* signal mask to restore. */ + sigset_t deferred_sigmask; + + /* the sigaction should be used for deferred signal. */ + struct sigaction deferred_sigact; + + /* deferred signal delivery is performed, do not reenter. */ + int deferred_run; + + /* Force new thread to exit. */ + int force_exit; + + /* Thread state: */ + enum pthread_state state; + + /* + * Error variable used instead of errno. The function __error() + * returns a pointer to this. + */ + int error; + + /* + * The joiner is the thread that is joining to this thread. The + * join status keeps track of a join operation to another thread. + */ + struct pthread *joiner; + + /* Miscellaneous flags; only set with scheduling lock held. */ + int flags; +#define THR_FLAGS_PRIVATE 0x0001 +#define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */ +#define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */ +#define THR_FLAGS_DETACHED 0x0008 /* thread is detached */ + + /* Thread list flags; only set with thread list lock held. */ + int tlflags; +#define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */ +#define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */ +#define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */ + + /* + * Queues of the owned mutexes. Private queue must have index + * + 1 of the corresponding full queue. + */ +#define TMQ_NORM 0 /* NORMAL or PRIO_INHERIT normal */ +#define TMQ_NORM_PRIV 1 /* NORMAL or PRIO_INHERIT normal priv */ +#define TMQ_NORM_PP 2 /* PRIO_PROTECT normal mutexes */ +#define TMQ_NORM_PP_PRIV 3 /* PRIO_PROTECT normal priv */ +#define TMQ_ROBUST_PP 4 /* PRIO_PROTECT robust mutexes */ +#define TMQ_ROBUST_PP_PRIV 5 /* PRIO_PROTECT robust priv */ +#define TMQ_NITEMS 6 + struct mutex_queue mq[TMQ_NITEMS]; + + void *ret; + struct pthread_specific_elem *specific; + int specific_data_count; + + /* Number rwlocks rdlocks held. */ + int rdlock_count; + + /* + * Current locks bitmap for rtld. */ + int rtld_bits; + + /* Thread control block */ + struct tcb *tcb; + + /* Cleanup handlers Link List */ + struct pthread_cleanup *cleanup; + +#ifdef _PTHREAD_FORCED_UNWIND + struct _Unwind_Exception ex; + void *unwind_stackend; + int unwind_disabled; +#endif + + /* + * Magic value to help recognize a valid thread structure + * from an invalid one: + */ +#define THR_MAGIC ((u_int32_t) 0xd09ba115) + u_int32_t magic; + + /* Enable event reporting */ + int report_events; + + /* Event mask */ + int event_mask; + + /* Event */ + td_event_msg_t event_buf; + + /* Wait channel */ + void *wchan; + + /* Referenced mutex. */ + struct pthread_mutex *mutex_obj; + + /* Thread will sleep. */ + int will_sleep; + + /* Number of threads deferred. */ + int nwaiter_defer; + + int robust_inited; + uintptr_t robust_list; + uintptr_t priv_robust_list; + uintptr_t inact_mtx; + + /* Deferred threads from pthread_cond_signal. */ + unsigned int *defer_waiters[MAX_DEFER_WAITERS]; + + /* rtld thread-local dlerror message and seen control */ + char dlerror_msg[512]; + int dlerror_seen; + +#define _pthread_endzero wake_addr + struct wake_addr *wake_addr; +#define WAKE_ADDR(td) ((td)->wake_addr) + + /* Sleep queue */ + struct sleepqueue *sleepqueue; + + /* pthread_set/get_name_np */ + char *name; + + struct uexterror uexterr; +}; + +#define THR_SHOULD_GC(thrd) \ + ((thrd)->refcount == 0 && (thrd)->state == PS_DEAD && \ + ((thrd)->flags & THR_FLAGS_DETACHED) != 0) + +#define THR_IN_CRITICAL(thrd) \ + (((thrd)->locklevel > 0) || \ + ((thrd)->critical_count > 0)) + +#define THR_CRITICAL_ENTER(thrd) \ + (thrd)->critical_count++ + +#define THR_CRITICAL_LEAVE(thrd) \ + do { \ + (thrd)->critical_count--; \ + _thr_ast(thrd); \ + } while (0) + +#define THR_UMUTEX_TRYLOCK(thrd, lck) \ + _thr_umutex_trylock((lck), TID(thrd)) + +#define THR_UMUTEX_LOCK(thrd, lck) \ + _thr_umutex_lock((lck), TID(thrd)) + +#define THR_UMUTEX_TIMEDLOCK(thrd, lck, timo) \ + _thr_umutex_timedlock((lck), TID(thrd), (timo)) + +#define THR_UMUTEX_UNLOCK(thrd, lck) \ + _thr_umutex_unlock((lck), TID(thrd)) + +#define THR_LOCK_ACQUIRE(thrd, lck) \ +do { \ + (thrd)->locklevel++; \ + _thr_umutex_lock(lck, TID(thrd)); \ +} while (0) + +#define THR_LOCK_ACQUIRE_SPIN(thrd, lck) \ +do { \ + (thrd)->locklevel++; \ + _thr_umutex_lock_spin(lck, TID(thrd)); \ +} while (0) + +#ifdef _PTHREADS_INVARIANTS +#define THR_ASSERT_LOCKLEVEL(thrd) \ +do { \ + if (__predict_false((thrd)->locklevel <= 0)) \ + _thr_assert_lock_level(); \ +} while (0) +#else +#define THR_ASSERT_LOCKLEVEL(thrd) +#endif + +#define THR_LOCK_RELEASE(thrd, lck) \ +do { \ + THR_ASSERT_LOCKLEVEL(thrd); \ + _thr_umutex_unlock((lck), TID(thrd)); \ + (thrd)->locklevel--; \ + _thr_ast(thrd); \ +} while (0) + +#define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock) +#define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock) +#define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock) +#define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock) + +#define THREAD_LIST_RDLOCK(curthrd) \ +do { \ + (curthrd)->locklevel++; \ + _thr_rwl_rdlock(&_thr_list_lock); \ +} while (0) + +#define THREAD_LIST_WRLOCK(curthrd) \ +do { \ + (curthrd)->locklevel++; \ + _thr_rwl_wrlock(&_thr_list_lock); \ +} while (0) + +#define THREAD_LIST_UNLOCK(curthrd) \ +do { \ + _thr_rwl_unlock(&_thr_list_lock); \ + (curthrd)->locklevel--; \ + _thr_ast(curthrd); \ +} while (0) + +/* + * Macros to insert/remove threads to the all thread list and + * the gc list. + */ +#define THR_LIST_ADD(thrd) do { \ + if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \ + TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \ + _thr_hash_add(thrd); \ + (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \ + } \ +} while (0) +#define THR_LIST_REMOVE(thrd) do { \ + if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \ + TAILQ_REMOVE(&_thread_list, thrd, tle); \ + _thr_hash_remove(thrd); \ + (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \ + } \ +} while (0) +#define THR_GCLIST_ADD(thrd) do { \ + if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \ + TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\ + (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \ + _gc_count++; \ + } \ +} while (0) +#define THR_GCLIST_REMOVE(thrd) do { \ + if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \ + TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \ + (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \ + _gc_count--; \ + } \ +} while (0) + +#define THR_REF_ADD(curthread, pthread) { \ + THR_CRITICAL_ENTER(curthread); \ + pthread->refcount++; \ +} while (0) + +#define THR_REF_DEL(curthread, pthread) { \ + pthread->refcount--; \ + THR_CRITICAL_LEAVE(curthread); \ +} while (0) + +#define GC_NEEDED() (_gc_count >= 5) + +#define SHOULD_REPORT_EVENT(curthr, e) \ + (curthr->report_events && \ + (((curthr)->event_mask | _thread_event_mask ) & e) != 0) + +#ifndef __LIBC_ISTHREADED_DECLARED +#define __LIBC_ISTHREADED_DECLARED +extern int __isthreaded; +#endif + +/* + * Global variables for the pthread kernel. + */ + +extern char *_usrstack __hidden; + +/* For debugger */ +extern int _libthr_debug; +extern int _thread_event_mask; +extern struct pthread *_thread_last_event; +/* Used in symbol lookup of libthread_db */ +extern struct pthread_key _thread_keytable[]; + +/* List of all threads: */ +extern pthreadlist _thread_list; + +/* List of threads needing GC: */ +extern pthreadlist _thread_gc_list __hidden; + +extern int _thread_active_threads; +extern atfork_head _thr_atfork_list __hidden; +extern struct urwlock _thr_atfork_lock __hidden; + +/* Default thread attributes: */ +extern struct pthread_attr _pthread_attr_default __hidden; + +/* Default mutex attributes: */ +extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden; +extern struct pthread_mutex_attr _pthread_mutexattr_adaptive_default __hidden; + +/* Default condition variable attributes: */ +extern struct pthread_cond_attr _pthread_condattr_default __hidden; + +extern struct pthread_prio _thr_priorities[] __hidden; + +extern int _thr_is_smp __hidden; + +extern size_t _thr_guard_default __hidden; +extern size_t _thr_stack_default __hidden; +extern size_t _thr_stack_initial __hidden; +extern int _thr_page_size __hidden; +extern int _thr_spinloops __hidden; +extern int _thr_yieldloops __hidden; +extern int _thr_queuefifo __hidden; + +/* Garbage thread count. */ +extern int _gc_count __hidden; + +extern struct umutex _mutex_static_lock __hidden; +extern struct umutex _cond_static_lock __hidden; +extern struct umutex _rwlock_static_lock __hidden; +extern struct umutex _keytable_lock __hidden; +extern struct urwlock _thr_list_lock __hidden; +extern struct umutex _thr_event_lock __hidden; +extern struct umutex _suspend_all_lock __hidden; +extern int _suspend_all_waiters __hidden; +extern int _suspend_all_cycle __hidden; +extern struct pthread *_single_thread __hidden; + +extern bool _thr_after_fork __hidden; + +extern int __thr_new_flags; + +/* + * Function prototype definitions. + */ +__BEGIN_DECLS +void _thr_setthreaded(int) __hidden; +int _mutex_cv_lock(struct pthread_mutex *, int, bool) __hidden; +int _mutex_cv_unlock(struct pthread_mutex *, int *, int *) __hidden; +int _mutex_cv_attach(struct pthread_mutex *, int) __hidden; +int _mutex_cv_detach(struct pthread_mutex *, int *) __hidden; +int _mutex_owned(struct pthread *, const struct pthread_mutex *) __hidden; +int _mutex_reinit(pthread_mutex_t *) __hidden; +void _mutex_fork(struct pthread *curthread) __hidden; +int _mutex_enter_robust(struct pthread *curthread, struct pthread_mutex *m) + __hidden; +void _mutex_leave_robust(struct pthread *curthread, struct pthread_mutex *m) + __hidden; +void _libpthread_init(struct pthread *) __hidden; +struct pthread *_thr_alloc(struct pthread *) __hidden; +void _thread_exit(const char *, int, const char *) __hidden __dead2; +void _thread_exitf(const char *, int, const char *, ...) __hidden __dead2 + __printflike(3, 4); +int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden; +void _thr_ref_delete(struct pthread *, struct pthread *) __hidden; +void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden; +int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden; +void _thr_rtld_init(void) __hidden; +void _thr_rtld_postfork_child(void) __hidden; +int _thr_stack_alloc(struct pthread_attr *) __hidden; +void _thr_stack_free(struct pthread_attr *) __hidden; +void _thr_free(struct pthread *, struct pthread *) __hidden; +void _thr_gc(struct pthread *) __hidden; +void _thread_cleanupspecific(void) __hidden; +void _thread_printf(int, const char *, ...) __hidden __printflike(2, 3); +void _thread_vprintf(int, const char *, va_list) __hidden; +void _thr_spinlock_init(void) __hidden; +void _thr_cancel_enter(struct pthread *) __hidden; +void _thr_cancel_enter2(struct pthread *, int) __hidden; +void _thr_cancel_leave(struct pthread *, int) __hidden; +void _thr_testcancel(struct pthread *) __hidden; +void _thr_signal_block(struct pthread *) __hidden; +void _thr_signal_unblock(struct pthread *) __hidden; +void _thr_signal_block_check_fast(void) __hidden; +void _thr_signal_block_setup(struct pthread *) __hidden; +void _thr_signal_init(int) __hidden; +void _thr_signal_deinit(void) __hidden; +int _thr_send_sig(struct pthread *, int sig) __hidden; +void _thr_list_init(void) __hidden; +void _thr_hash_add(struct pthread *) __hidden; +void _thr_hash_remove(struct pthread *) __hidden; +struct pthread *_thr_hash_find(struct pthread *) __hidden; +void _thr_link(struct pthread *, struct pthread *) __hidden; +void _thr_unlink(struct pthread *, struct pthread *) __hidden; +void _thr_assert_lock_level(void) __hidden __dead2; +void _thr_ast(struct pthread *) __hidden; +void _thr_report_creation(struct pthread *curthread, + struct pthread *newthread) __hidden; +void _thr_report_death(struct pthread *curthread) __hidden; +int _thr_getscheduler(lwpid_t, int *, struct sched_param *) __hidden; +int _thr_setscheduler(lwpid_t, int, const struct sched_param *) __hidden; +void _thr_signal_prefork(void) __hidden; +void _thr_signal_postfork(void) __hidden; +void _thr_signal_postfork_child(void) __hidden; +void _thr_suspend_all_lock(struct pthread *) __hidden; +void _thr_suspend_all_unlock(struct pthread *) __hidden; +void _thr_suspend_all_np(void) __hidden; +void _thr_resume_all_np(void) __hidden; +void _thr_try_gc(struct pthread *, struct pthread *) __hidden; +int _rtp_to_schedparam(const struct rtprio *rtp, int *policy, + struct sched_param *param) __hidden; +int _schedparam_to_rtp(int policy, const struct sched_param *param, + struct rtprio *rtp) __hidden; +void _thread_bp_create(void); +void _thread_bp_death(void); +int _sched_yield(void); + +void _pthread_cleanup_push(void (*)(void *), void *); +void _pthread_cleanup_pop(int); +void _pthread_exit_mask(void *status, sigset_t *mask) __dead2 __hidden; +#ifndef _LIBC_PRIVATE_H_ +void _pthread_cancel_enter(int maycancel); +void _pthread_cancel_leave(int maycancel); +#endif +int _pthread_mutex_consistent(pthread_mutex_t * _Nonnull); +int _pthread_mutexattr_getrobust(pthread_mutexattr_t * _Nonnull __restrict, + int * _Nonnull __restrict); +int _pthread_mutexattr_setrobust(pthread_mutexattr_t * _Nonnull, int); + +/* #include <fcntl.h> */ +#ifdef _SYS_FCNTL_H_ +#ifndef _LIBC_PRIVATE_H_ +int __sys_fcntl(int, int, intptr_t); +int __sys_openat(int, const char *, int, int); +#endif /* _LIBC_PRIVATE_H_ */ +#endif /* _SYS_FCNTL_H_ */ + +/* #include <signal.h> */ +#ifdef _SIGNAL_H_ +#ifndef _LIBC_PRIVATE_H_ +int __sys_sigaction(int, const struct sigaction *, struct sigaction *); +int __sys_sigprocmask(int, const sigset_t *, sigset_t *); +int __sys_sigsuspend(const sigset_t *); +int __sys_sigtimedwait(const sigset_t *, siginfo_t *, + const struct timespec *); +int __sys_sigwait(const sigset_t *, int *); +int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); +#endif /* _LIBC_PRIVATE_H_ */ +#endif /* _SYS_FCNTL_H_ */ + +/* #include <time.h> */ +#ifdef _TIME_H_ +#ifndef _LIBC_PRIVATE_H_ +int __sys_clock_nanosleep(clockid_t, int, const struct timespec *, + struct timespec *); +int __sys_nanosleep(const struct timespec *, struct timespec *); +#endif /* _LIBC_PRIVATE_H_ */ +#endif /* _SYS_FCNTL_H_ */ + +/* #include <sys/ucontext.h> */ +#ifdef _SYS_UCONTEXT_H_ +#ifndef _LIBC_PRIVATE_H_ +int __sys_setcontext(const ucontext_t *ucp); +int __sys_swapcontext(ucontext_t *oucp, const ucontext_t *ucp); +#endif /* _LIBC_PRIVATE_H_ */ +#endif /* _SYS_FCNTL_H_ */ + +/* #include <unistd.h> */ +#ifdef _UNISTD_H_ +#ifndef _LIBC_PRIVATE_H_ +int __sys_close(int); +int __sys_fork(void); +ssize_t __sys_read(int, void *, size_t); +#endif /* _LIBC_PRIVATE_H_ */ +#endif /* _SYS_FCNTL_H_ */ + +static inline int +_thr_isthreaded(void) +{ + return (__isthreaded != 0); +} + +static inline int +_thr_is_inited(void) +{ + return (_thr_initial != NULL); +} + +static inline void +_thr_check_init(void) +{ + if (_thr_initial == NULL) + _libpthread_init(NULL); +} + +struct wake_addr *_thr_alloc_wake_addr(void); +void _thr_release_wake_addr(struct wake_addr *); +int _thr_sleep(struct pthread *, int, const struct timespec *); + +void _thr_wake_addr_init(void) __hidden; + +static inline void +_thr_clear_wake(struct pthread *td) +{ + td->wake_addr->value = 0; +} + +static inline int +_thr_is_woken(struct pthread *td) +{ + return td->wake_addr->value != 0; +} + +static inline void +_thr_set_wake(unsigned int *waddr) +{ + *waddr = 1; + _thr_umtx_wake(waddr, INT_MAX, 0); +} + +void _thr_wake_all(unsigned int *waddrs[], int) __hidden; + +static inline struct pthread * +_sleepq_first(struct sleepqueue *sq) +{ + return TAILQ_FIRST(&sq->sq_blocked); +} + +void _sleepq_init(void) __hidden; +struct sleepqueue *_sleepq_alloc(void) __hidden; +void _sleepq_free(struct sleepqueue *) __hidden; +void _sleepq_lock(void *) __hidden; +void _sleepq_unlock(void *) __hidden; +struct sleepqueue *_sleepq_lookup(void *) __hidden; +void _sleepq_add(void *, struct pthread *) __hidden; +int _sleepq_remove(struct sleepqueue *, struct pthread *) __hidden; +void _sleepq_drop(struct sleepqueue *, + void (*cb)(struct pthread *, void *arg), void *) __hidden; + +int _pthread_mutex_init_calloc_cb(pthread_mutex_t *mutex, + void *(calloc_cb)(size_t, size_t)); + +struct dl_phdr_info; +void __pthread_cxa_finalize(struct dl_phdr_info *phdr_info); +void _thr_tsd_unload(struct dl_phdr_info *phdr_info) __hidden; +void _thr_sigact_unload(struct dl_phdr_info *phdr_info) __hidden; +void _thr_stack_fix_protection(struct pthread *thrd); + +int *__error_threaded(void) __hidden; +void __thr_interpose_libc(void) __hidden; +pid_t __thr_fork(void); +pid_t __thr_pdfork(int *, int); +int __thr_setcontext(const ucontext_t *ucp); +int __thr_sigaction(int sig, const struct sigaction *act, + struct sigaction *oact) __hidden; +int __thr_sigprocmask(int how, const sigset_t *set, sigset_t *oset); +int __thr_sigsuspend(const sigset_t * set); +int __thr_sigtimedwait(const sigset_t *set, siginfo_t *info, + const struct timespec * timeout); +int __thr_sigwait(const sigset_t *set, int *sig); +int __thr_sigwaitinfo(const sigset_t *set, siginfo_t *info); +int __thr_swapcontext(ucontext_t *oucp, const ucontext_t *ucp); + +void __thr_map_stacks_exec(void); + +struct _spinlock; +void __thr_spinunlock(struct _spinlock *lck); +void __thr_spinlock(struct _spinlock *lck); + +struct tcb *_tcb_ctor(struct pthread *, int); +void _tcb_dtor(struct tcb *); + +void __thr_pshared_init(void) __hidden; +void *__thr_pshared_offpage(void *key, int doalloc) __hidden; +void __thr_pshared_destroy(void *key) __hidden; +void __thr_pshared_atfork_pre(void) __hidden; +void __thr_pshared_atfork_post(void) __hidden; + +void *__thr_aligned_alloc_offset(size_t align, size_t size, size_t offset); +void *__thr_calloc(size_t num, size_t size); +void __thr_free(void *cp); +void *__thr_malloc(size_t nbytes); +void *__thr_realloc(void *cp, size_t nbytes); +void __thr_malloc_init(void); +void __thr_malloc_prefork(struct pthread *curthread); +void __thr_malloc_postfork(struct pthread *curthread); + +int _thr_join(pthread_t, void **); +int _Tthr_kill(pthread_t, int); +int _thr_getthreadid_np(void); +void __thr_cleanup_push_imp(void (*)(void *), void *, + struct _pthread_cleanup_info *); +void __thr_cleanup_pop_imp(int); +void _thr_cleanup_push(void (*)(void *), void *); +void _thr_cleanup_pop(int); +void _Tthr_testcancel(void); +void _Tthr_cancel_enter(int); +void _Tthr_cancel_leave(int); +int _thr_cancel(pthread_t); +int _thr_atfork(void (*)(void), void (*)(void), void (*)(void)); +int _thr_attr_destroy(pthread_attr_t *); +int _thr_attr_get_np(pthread_t, pthread_attr_t *); +int _thr_attr_getdetachstate(const pthread_attr_t *, int *); +int _thr_attr_getguardsize(const pthread_attr_t * __restrict, + size_t * __restrict); +int _thr_attr_getinheritsched(const pthread_attr_t * __restrict, + int * __restrict); +int _thr_attr_getschedparam(const pthread_attr_t * __restrict, + struct sched_param * __restrict); +int _thr_attr_getschedpolicy(const pthread_attr_t * __restrict, + int * __restrict); +int _thr_attr_getscope(const pthread_attr_t * __restrict, int * __restrict); +int _thr_attr_getstackaddr(const pthread_attr_t *, void **); +int _thr_attr_getstacksize(const pthread_attr_t * __restrict, + size_t * __restrict); +int _thr_attr_init(pthread_attr_t *); +int _thr_attr_setdetachstate(pthread_attr_t *, int); +int _thr_attr_setguardsize(pthread_attr_t *, size_t); +int _thr_attr_setinheritsched(pthread_attr_t *, int); +int _thr_attr_setschedparam(pthread_attr_t * __restrict, + const struct sched_param * __restrict); +int _thr_attr_setschedpolicy(pthread_attr_t *, int); +int _thr_attr_setscope(pthread_attr_t *, int); +int _thr_attr_setstackaddr(pthread_attr_t *, void *); +int _thr_attr_setstacksize(pthread_attr_t *, size_t); +int _thr_cond_init(pthread_cond_t * __restrict, + const pthread_condattr_t * __restrict); +int _thr_cond_destroy(pthread_cond_t *); +int _thr_cond_timedwait(pthread_cond_t * __restrict, + pthread_mutex_t * __restrict, const struct timespec * __restrict); +int _thr_cond_signal(pthread_cond_t * cond); +int _thr_cond_broadcast(pthread_cond_t * cond); +int __thr_cond_wait(pthread_cond_t *, pthread_mutex_t *); +int _thr_cond_wait(pthread_cond_t *, pthread_mutex_t *); +int _thr_detach(pthread_t); +int _thr_equal(pthread_t, pthread_t); +void _Tthr_exit(void *); +int _thr_getname_np(pthread_t, char *, size_t); +int _thr_key_create(pthread_key_t *, void (*)(void *)); +int _thr_key_delete(pthread_key_t); +int _thr_setspecific(pthread_key_t, const void *); +void *_thr_getspecific(pthread_key_t); +int _thr_setcancelstate(int, int *); +int _thr_setcanceltype(int, int *); +pthread_t _Tthr_self(void); +int _thr_rwlock_init(pthread_rwlock_t *, const pthread_rwlockattr_t *); +int _thr_rwlock_destroy(pthread_rwlock_t *); +int _Tthr_rwlock_rdlock(pthread_rwlock_t *); +int _Tthr_rwlock_tryrdlock(pthread_rwlock_t *); +int _Tthr_rwlock_trywrlock(pthread_rwlock_t *); +int _Tthr_rwlock_wrlock(pthread_rwlock_t *); +int _Tthr_rwlock_unlock(pthread_rwlock_t *); +int _thr_once(pthread_once_t *, void (*)(void)); +int _thr_sigmask(int, const sigset_t *, sigset_t *); +int _thr_main_np(void); +int _thr_mutexattr_init(pthread_mutexattr_t *); +int _thr_mutexattr_destroy(pthread_mutexattr_t *); +int _thr_mutexattr_settype(pthread_mutexattr_t *, int); +int _thr_mutexattr_getrobust(pthread_mutexattr_t *, int *); +int _thr_mutexattr_setrobust(pthread_mutexattr_t *, int); +int __Tthr_mutex_init(pthread_mutex_t * __restrict, + const pthread_mutexattr_t * __restrict); +int _Tthr_mutex_consistent(pthread_mutex_t *); +int _thr_mutex_destroy(pthread_mutex_t *); +int _thr_mutex_unlock(pthread_mutex_t *); +int __Tthr_mutex_lock(pthread_mutex_t *); +int __Tthr_mutex_trylock(pthread_mutex_t *); +bool __thr_get_main_stack_base(char **base); +bool __thr_get_main_stack_lim(size_t *lim); +int _Tthr_sigqueue(pthread_t pthread, int sig, const union sigval value); +void _thr_resolve_machdep(void); + +__END_DECLS +__NULLABILITY_PRAGMA_POP + +#endif /* !_THR_PRIVATE_H */ |