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bd43f0691c
freebsd-nq/lib/libthr/thread/thr_private.h
Konstantin Belousov bd43f0691c If libthr.so is dlopened without RTLD_GLOBAL flag, the libthr symbols 
do not participate in the global symbols namespace, but rtld locks are
still replaced and functions are interposed.  In particular,
__pthread_map_stacks_exec is resolved to the libc version.  If a
library is loaded later, which requires adjustment of the stack
protection mode, rtld calls into libc __pthread_map_stacks_exec due to
the symbols scope.  The libc version might recurse into binder and
recursively acquire rtld bind lock, causing the hang.

Make libc __pthread_map_stacks_exec() interposed, which synchronizes
rtld locks and version of the stack exec hook when libthr loaded,
regardless of the symbol scope control or symbol resolution order.

The __pthread_map_stacks_exec() symbol is removed from the private
version in libthr since libc symbol now operates correctly in presence
of libthr.

Reported and tested by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
2016-02-08 19:24:13 +00:00

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/*
* 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.
*
* $FreeBSD$
*/
#ifndef _THR_PRIVATE_H
#define _THR_PRIVATE_H
/*
* Include files.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <sys/cdefs.h>
#include <sys/queue.h>
#include <sys/param.h>
#include <sys/cpuset.h>
#include <machine/atomic.h>
#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <stddef.h>
#include <stdio.h>
#include <unistd.h>
#include <ucontext.h>
#include <sys/thr.h>
#include <pthread.h>
#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)
#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(string) _thread_exit(__FILE__,__LINE__,string)
/* 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)
/* 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_DEFERED 0x200
#define PMUTEX_TYPE(mtxflags) ((mtxflags) & PMUTEX_FLAG_TYPE_MASK)
#define MAX_DEFER_WAITERS 50
struct pthread_mutex {
/*
* Lock for accesses to this structure.
*/
struct umutex m_lock;
int m_flags;
struct pthread *m_owner;
int m_count;
int m_spinloops;
int m_yieldloops;
/*
* Link for all mutexes a thread currently owns.
*/
TAILQ_ENTRY(pthread_mutex) m_qe;
};
struct pthread_mutex_attr {
enum pthread_mutextype m_type;
int m_protocol;
int m_ceiling;
};
#define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \
{ PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE }
struct pthread_cond {
__uint32_t __has_user_waiters;
__uint32_t __has_kern_waiters;
__uint32_t __flags;
__uint32_t __clock_id;
};
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 {
#define pthread_attr_start_copy sched_policy
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;
#define pthread_attr_end_copy cpuset
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;
struct pthread *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;
/* 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 */
/* Queue of currently owned NORMAL or PRIO_INHERIT type mutexes. */
struct mutex_queue mutexq;
/* Queue of all owned PRIO_PROTECT mutexes. */
struct mutex_queue pp_mutexq;
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;
/* Deferred threads from pthread_cond_signal. */
unsigned int *defer_waiters[MAX_DEFER_WAITERS];
#define _pthread_endzero wake_addr
struct wake_addr *wake_addr;
#define WAKE_ADDR(td) ((td)->wake_addr)
/* Sleep queue */
struct sleepqueue *sleepqueue;
};
#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)
extern int __isthreaded;
/*
* Global variables for the pthread kernel.
*/
extern char *_usrstack __hidden;
extern struct pthread *_thr_initial __hidden;
/* For debugger */
extern int _libthr_debug;
extern int _thread_event_mask;
extern struct pthread *_thread_last_event;
/* 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 pid_t _thr_pid __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;
/*
* Function prototype definitions.
*/
__BEGIN_DECLS
int _thr_setthreaded(int) __hidden;
int _mutex_cv_lock(struct pthread_mutex *, int) __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;
void _libpthread_init(struct pthread *) __hidden;
struct pthread *_thr_alloc(struct pthread *) __hidden;
void _thread_exit(const char *, int, const char *) __hidden __dead2;
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;
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_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_once_init(void) __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_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;
void _pthread_cancel_enter(int maycancel);
void _pthread_cancel_leave(int maycancel);
/* #include <fcntl.h> */
#ifdef _SYS_FCNTL_H_
int __sys_fcntl(int, int, ...);
int __sys_openat(int, const char *, int, ...);
#endif
/* #include <signal.h> */
#ifdef _SIGNAL_H_
int __sys_kill(pid_t, int);
int __sys_sigaction(int, const struct sigaction *, struct sigaction *);
int __sys_sigpending(sigset_t *);
int __sys_sigprocmask(int, const sigset_t *, sigset_t *);
int __sys_sigsuspend(const sigset_t *);
int __sys_sigreturn(const ucontext_t *);
int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *);
int __sys_sigwait(const sigset_t *, int *);
int __sys_sigtimedwait(const sigset_t *, siginfo_t *,
const struct timespec *);
int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info);
#endif
/* #include <time.h> */
#ifdef _TIME_H_
int __sys_nanosleep(const struct timespec *, struct timespec *);
#endif
/* #include <sys/ucontext.h> */
#ifdef _SYS_UCONTEXT_H_
int __sys_setcontext(const ucontext_t *ucp);
int __sys_swapcontext(ucontext_t *oucp, const ucontext_t *ucp);
#endif
/* #include <unistd.h> */
#ifdef _UNISTD_H_
int __sys_close(int);
int __sys_fork(void);
pid_t __sys_getpid(void);
ssize_t __sys_read(int, void *, size_t);
void __sys_exit(int);
#endif
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);
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 *);
__END_DECLS
#endif /* !_THR_PRIVATE_H */
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