src/pthread_tsd.c

/*
 * Copyright (c) 2000-2003, 2007, 2012 Apple Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991
 *              All Rights Reserved
 *
 * Permission to use, copy, modify, and distribute this software and
 * its documentation for any purpose and without fee is hereby granted,
 * provided that the above copyright notice appears in all copies and
 * that both the copyright notice and this permission notice appear in
 * supporting documentation.
 *
 * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE.
 *
 * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
 * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 */
/*
 * MkLinux
 */

/*
 * POSIX Pthread Library
 *   Thread Specific Data support
 *   NB: pthread_getspecific() is in a separate assembly file
 */

#include "internal.h"
#include <TargetConditionals.h>

#ifndef PTHREAD_KEY_LEGACY_SUPPORT
#if TARGET_OS_DRIVERKIT
#define PTHREAD_KEY_LEGACY_SUPPORT 0
#else
#define PTHREAD_KEY_LEGACY_SUPPORT 1
#endif // TARGET_OS_DRIVERKIT
#endif // PTHREAD_KEY_LEGACY_SUPPORT

#if !VARIANT_DYLD
// __pthread_tsd_first is first static key managed by libpthread.
// __pthread_tsd_max is the (observed) end of static key destructors.
// __pthread_tsd_start is the start of dynamic keys.
// __pthread_tsd_end is the end of dynamic keys.

static const int __pthread_tsd_first = __TSD_RESERVED_MAX + 1;
static const int __pthread_tsd_start = _INTERNAL_POSIX_THREAD_KEYS_MAX;
static const int __pthread_tsd_end = _INTERNAL_POSIX_THREAD_KEYS_END;

static int __pthread_tsd_max = __pthread_tsd_first;
static _pthread_lock __pthread_tsd_lock = _PTHREAD_LOCK_INITIALIZER;
#if PTHREAD_KEY_LEGACY_SUPPORT
static bool __pthread_key_legacy_behaviour = 0;
static bool __pthread_key_legacy_behaviour_log = 0;
#else
#define __pthread_key_legacy_behaviour 0
#define _pthread_tsd_cleanup_legacy(...)
#endif // PTHREAD_KEY_LEGACY_SUPPORT

// Omit support for pthread key destructors in the static archive for dyld.
// dyld does not create and destroy threads so these are not necessary.
//
// We store the bit-wise negation of the destructor so that a quick non-zero
// test can be used to determine if the destructor has been set, even if it is
// NULL. This means that a destructor of value ~0x0ull cannot be used. That
// shouldn't be a problem in practice since it isn't a valid function address.

static struct {
	uintptr_t destructor;
} _pthread_keys[_INTERNAL_POSIX_THREAD_KEYS_END];

// The pthread_tsd destruction order can be reverted to the old (pre-10.11) order
// by setting this environment variable.
void
_pthread_key_global_init(const char *envp[])
{
#if PTHREAD_KEY_LEGACY_SUPPORT
	if (_simple_getenv(envp, "PTHREAD_KEY_LEGACY_DESTRUCTOR_ORDER")) {
		__pthread_key_legacy_behaviour = true;
	}
	if (_simple_getenv(envp, "PTHREAD_KEY_LEGACY_DESTRUCTOR_ORDER_LOG")) {
		__pthread_key_legacy_behaviour_log = true;
	}
#endif // PTHREAD_KEY_LEGACY_SUPPORT
}

// Returns true if successful, false if destructor was already set.
static bool
_pthread_key_set_destructor(pthread_key_t key, void (*destructor)(void *))
{
	uintptr_t *ptr = &_pthread_keys[key].destructor;
	uintptr_t value = ~(uintptr_t)destructor;
	if (*ptr == 0) {
		*ptr = value;
		return true;
	}
	return false;
}

// Returns true if successful, false if the destructor was not set.
static bool
_pthread_key_unset_destructor(pthread_key_t key)
{
	uintptr_t *ptr = &_pthread_keys[key].destructor;
	if (*ptr != 0) {
		*ptr = 0;
		return true;
	}
	return false;
}

// Returns true if successful, false if the destructor was not set.
static bool
_pthread_key_get_destructor(pthread_key_t key, void (**destructor)(void *))
{
	uintptr_t value = _pthread_keys[key].destructor;
	if (destructor) {
		*destructor = (void (*)(void *))(~value);
	}
	return (value != 0);
}

int
pthread_key_create(pthread_key_t *key, void (*destructor)(void *))
{
	int res = EAGAIN; // Returns EAGAIN if key cannot be allocated.
	pthread_key_t k;

	_PTHREAD_LOCK(__pthread_tsd_lock);
	for (k = __pthread_tsd_start; k < __pthread_tsd_end; k++) {
		if (_pthread_key_set_destructor(k, destructor)) {
			*key = k;
			res = 0;
			break;
		}
	}
	_PTHREAD_UNLOCK(__pthread_tsd_lock);

	return res;
}

int
pthread_key_delete(pthread_key_t key)
{
	int res = EINVAL; // Returns EINVAL if key is not allocated.

	_PTHREAD_LOCK(__pthread_tsd_lock);
	if (key >= __pthread_tsd_start && key < __pthread_tsd_end) {
		if (_pthread_key_unset_destructor(key)) {
			struct _pthread *p;
			_PTHREAD_LOCK(_pthread_list_lock);
			TAILQ_FOREACH(p, &__pthread_head, tl_plist) {
				// No lock for word-sized write.
				p->tsd[key] = 0;
			}
			_PTHREAD_UNLOCK(_pthread_list_lock);
			res = 0;
		}
	}
	_PTHREAD_UNLOCK(__pthread_tsd_lock);

	return res;
}
#endif // !VARIANT_DYLD

int
pthread_setspecific(pthread_key_t key, const void *value)
{
	int res = EINVAL;

#if !VARIANT_DYLD
	if (key >= __pthread_tsd_first && key < __pthread_tsd_end) {
		bool created = _pthread_key_get_destructor(key, NULL);
		if (key < __pthread_tsd_start || created) {
			struct _pthread *self = pthread_self();
			self->tsd[key] = (void *)value;
			res = 0;

			if (key < __pthread_tsd_start) {
				// XXX: is this really necessary?
				_pthread_key_set_destructor(key, NULL);
			}
			if (key > self->max_tsd_key) {
				self->max_tsd_key = (uint16_t)key;
			}
		}
	}
#endif // !VARIANT_DYLD

	return res;
}

int
_pthread_setspecific_static(pthread_key_t key, void *value)
{
	int res = EINVAL;

#if !VARIANT_DYLD
	if (key < __pthread_tsd_start) {
		_pthread_setspecific_direct(key, value);
		res = 0;
	}
#endif // !VARIANT_DYLD

	return res;
}

void*
pthread_getspecific(pthread_key_t key)
{
	return _pthread_getspecific_direct(key);
}

#if !VARIANT_DYLD
static void
_pthread_tsd_cleanup_key(pthread_t self, pthread_key_t key)
{
	void (*destructor)(void *);
	if (_pthread_key_get_destructor(key, &destructor)) {
		void **ptr = &self->tsd[key];
		void *value = *ptr;
		if (value) {
			*ptr = NULL;
			if (destructor) {
				destructor(value);
			}
		}
	}
}
#endif // !VARIANT_DYLD

#if !VARIANT_DYLD
static void
_pthread_tsd_cleanup_new(pthread_t self)
{
	int j;

	// clean up all keys
	for (j = 0; j < PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
		pthread_key_t k;
		for (k = __pthread_tsd_start; k <= self->max_tsd_key; k++) {
			_pthread_tsd_cleanup_key(self, k);
		}

		for (k = __pthread_tsd_first; k <= __pthread_tsd_max; k++) {
			_pthread_tsd_cleanup_key(self, k);
		}
	}

	self->max_tsd_key = 0;
}

#if PTHREAD_KEY_LEGACY_SUPPORT
#import <_simple.h>
#import <dlfcn.h>
static void
_pthread_tsd_behaviour_check(pthread_t self)
{
	// Iterate from dynamic-key start to dynamic-key end, if the key has both
	// a desctructor and a value then _pthread_tsd_cleanup_key would cause
	// us to re-trigger the destructor.
	Dl_info i;
	pthread_key_t k;

	for (k = __pthread_tsd_start; k < __pthread_tsd_end; k++) {
		void (*destructor)(void *);
		if (_pthread_key_get_destructor(k, &destructor)) {
			void **ptr = &self->tsd[k];
			void *value = *ptr;
			if (value && destructor) {
				_simple_asl_log(ASL_LEVEL_ERR, "pthread_tsd",
						"warning: dynamic tsd keys dirty after static key cleanup loop.");

				if (dladdr(destructor, &i) == 0) {
					_simple_asl_log(ASL_LEVEL_ERR, "pthread_tsd", i.dli_fname);
					_simple_asl_log(ASL_LEVEL_ERR, "pthread_tsd", i.dli_saddr);
				}
			}
		}
	}

}

static void
_pthread_tsd_cleanup_legacy(pthread_t self)
{
	int j;

	// clean up dynamic keys first
	for (j = 0; j < PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
		pthread_key_t k;
		for (k = __pthread_tsd_start; k <= self->max_tsd_key; k++) {
			_pthread_tsd_cleanup_key(self, k);
		}
	}

	self->max_tsd_key = 0;

	// clean up static keys
	for (j = 0; j < PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
		pthread_key_t k;
		for (k = __pthread_tsd_first; k <= __pthread_tsd_max; k++) {
			_pthread_tsd_cleanup_key(self, k);
		}

		if (__pthread_key_legacy_behaviour_log != 0 && self->max_tsd_key != 0) {
			// max_tsd_key got dirtied, either by static or dynamic keys being
			// reset. check for any dirty dynamic keys.
			_pthread_tsd_behaviour_check(self);
		}
	}
}
#endif // PTHREAD_KEY_LEGACY_SUPPORT
#endif // !VARIANT_DYLD

void
_pthread_tsd_cleanup(pthread_t self)
{
#if !VARIANT_DYLD

	// unless __pthread_key_legacy_behaviour == 1, use the new pthread key
	// destructor order: (dynamic -> static) x5 -> (GC x5)

	if (__pthread_key_legacy_behaviour == 0) {
		_pthread_tsd_cleanup_new(self);
	} else {
		_pthread_tsd_cleanup_legacy(self);
	}
#endif // !VARIANT_DYLD
}

#if !VARIANT_DYLD
// XXX: key should be pthread_key_t
int
pthread_key_init_np(int key, void (*destructor)(void *))
{
	int res = EINVAL; // Returns EINVAL if key is out of range.
	if (key >= __pthread_tsd_first && key < __pthread_tsd_start) {
		_PTHREAD_LOCK(__pthread_tsd_lock);
		_pthread_key_set_destructor(key, destructor);
		if (key > __pthread_tsd_max) {
			__pthread_tsd_max = key;
		}
		_PTHREAD_UNLOCK(__pthread_tsd_lock);
		res = 0;
	}
	return res;
}
#endif // !VARIANT_DYLD

#undef pthread_self
pthread_t
pthread_self(void)
{
	return _pthread_getspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_SELF);
}
Commit	Line	Data
	1	/*
	2	* Copyright (c) 2000-2003, 2007, 2012 Apple Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. Please obtain a copy of the License at
	10	* http://www.opensource.apple.com/apsl/ and read it before using this
	11	* file.
	12	*
	13	* The Original Code and all software distributed under the License are
	14	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	17	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	18	* Please see the License for the specific language governing rights and
	19	* limitations under the License.
	20	*
	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23	/*
	24	* Copyright 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991
	25	* All Rights Reserved
	26	*
	27	* Permission to use, copy, modify, and distribute this software and
	28	* its documentation for any purpose and without fee is hereby granted,
	29	* provided that the above copyright notice appears in all copies and
	30	* that both the copyright notice and this permission notice appear in
	31	* supporting documentation.
	32	*
	33	* OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
	34	* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
	35	* FOR A PARTICULAR PURPOSE.
	36	*
	37	* IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
	38	* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
	39	* LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
	40	* NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
	41	* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	42	*
	43	*/
	44	/*
	45	* MkLinux
	46	*/
	47
	48	/*
	49	* POSIX Pthread Library
	50	* Thread Specific Data support
	51	* NB: pthread_getspecific() is in a separate assembly file
	52	*/
	53
	54	#include "internal.h"
	55	#include <TargetConditionals.h>
	56
	57	#ifndef PTHREAD_KEY_LEGACY_SUPPORT
	58	#if TARGET_OS_DRIVERKIT
	59	#define PTHREAD_KEY_LEGACY_SUPPORT 0
	60	#else
	61	#define PTHREAD_KEY_LEGACY_SUPPORT 1
	62	#endif // TARGET_OS_DRIVERKIT
	63	#endif // PTHREAD_KEY_LEGACY_SUPPORT
	64
	65	#if !VARIANT_DYLD
	66	// __pthread_tsd_first is first static key managed by libpthread.
	67	// __pthread_tsd_max is the (observed) end of static key destructors.
	68	// __pthread_tsd_start is the start of dynamic keys.
	69	// __pthread_tsd_end is the end of dynamic keys.
	70
	71	static const int __pthread_tsd_first = __TSD_RESERVED_MAX + 1;
	72	static const int __pthread_tsd_start = _INTERNAL_POSIX_THREAD_KEYS_MAX;
	73	static const int __pthread_tsd_end = _INTERNAL_POSIX_THREAD_KEYS_END;
	74
	75	static int __pthread_tsd_max = __pthread_tsd_first;
	76	static _pthread_lock __pthread_tsd_lock = _PTHREAD_LOCK_INITIALIZER;
	77	#if PTHREAD_KEY_LEGACY_SUPPORT
	78	static bool __pthread_key_legacy_behaviour = 0;
	79	static bool __pthread_key_legacy_behaviour_log = 0;
	80	#else
	81	#define __pthread_key_legacy_behaviour 0
	82	#define _pthread_tsd_cleanup_legacy(...)
	83	#endif // PTHREAD_KEY_LEGACY_SUPPORT
	84
	85	// Omit support for pthread key destructors in the static archive for dyld.
	86	// dyld does not create and destroy threads so these are not necessary.
	87	//
	88	// We store the bit-wise negation of the destructor so that a quick non-zero
	89	// test can be used to determine if the destructor has been set, even if it is
	90	// NULL. This means that a destructor of value ~0x0ull cannot be used. That
	91	// shouldn't be a problem in practice since it isn't a valid function address.
	92
	93	static struct {
	94	uintptr_t destructor;
	95	} _pthread_keys[_INTERNAL_POSIX_THREAD_KEYS_END];
	96
	97	// The pthread_tsd destruction order can be reverted to the old (pre-10.11) order
	98	// by setting this environment variable.
	99	void
	100	_pthread_key_global_init(const char *envp[])
	101	{
	102	#if PTHREAD_KEY_LEGACY_SUPPORT
	103	if (_simple_getenv(envp, "PTHREAD_KEY_LEGACY_DESTRUCTOR_ORDER")) {
	104	__pthread_key_legacy_behaviour = true;
	105	}
	106	if (_simple_getenv(envp, "PTHREAD_KEY_LEGACY_DESTRUCTOR_ORDER_LOG")) {
	107	__pthread_key_legacy_behaviour_log = true;
	108	}
	109	#endif // PTHREAD_KEY_LEGACY_SUPPORT
	110	}
	111
	112	// Returns true if successful, false if destructor was already set.
	113	static bool
	114	_pthread_key_set_destructor(pthread_key_t key, void (destructor)(void ))
	115	{
	116	uintptr_t *ptr = &_pthread_keys[key].destructor;
	117	uintptr_t value = ~(uintptr_t)destructor;
	118	if (*ptr == 0) {
	119	*ptr = value;
	120	return true;
	121	}
	122	return false;
	123	}
	124
	125	// Returns true if successful, false if the destructor was not set.
	126	static bool
	127	_pthread_key_unset_destructor(pthread_key_t key)
	128	{
	129	uintptr_t *ptr = &_pthread_keys[key].destructor;
	130	if (*ptr != 0) {
	131	*ptr = 0;
	132	return true;
	133	}
	134	return false;
	135	}
	136
	137	// Returns true if successful, false if the destructor was not set.
	138	static bool
	139	_pthread_key_get_destructor(pthread_key_t key, void (*destructor)(void ))
	140	{
	141	uintptr_t value = _pthread_keys[key].destructor;
	142	if (destructor) {
	143	destructor = (void ()(void *))(~value);
	144	}
	145	return (value != 0);
	146	}
	147
	148	int
	149	pthread_key_create(pthread_key_t key, void (destructor)(void *))
	150	{
	151	int res = EAGAIN; // Returns EAGAIN if key cannot be allocated.
	152	pthread_key_t k;
	153
	154	_PTHREAD_LOCK(__pthread_tsd_lock);
	155	for (k = __pthread_tsd_start; k < __pthread_tsd_end; k++) {
	156	if (_pthread_key_set_destructor(k, destructor)) {
	157	*key = k;
	158	res = 0;
	159	break;
	160	}
	161	}
	162	_PTHREAD_UNLOCK(__pthread_tsd_lock);
	163
	164	return res;
	165	}
	166
	167	int
	168	pthread_key_delete(pthread_key_t key)
	169	{
	170	int res = EINVAL; // Returns EINVAL if key is not allocated.
	171
	172	_PTHREAD_LOCK(__pthread_tsd_lock);
	173	if (key >= __pthread_tsd_start && key < __pthread_tsd_end) {
	174	if (_pthread_key_unset_destructor(key)) {
	175	struct _pthread *p;
	176	_PTHREAD_LOCK(_pthread_list_lock);
	177	TAILQ_FOREACH(p, &__pthread_head, tl_plist) {
	178	// No lock for word-sized write.
	179	p->tsd[key] = 0;
	180	}
	181	_PTHREAD_UNLOCK(_pthread_list_lock);
	182	res = 0;
	183	}
	184	}
	185	_PTHREAD_UNLOCK(__pthread_tsd_lock);
	186
	187	return res;
	188	}
	189	#endif // !VARIANT_DYLD
	190
	191	int
	192	pthread_setspecific(pthread_key_t key, const void *value)
	193	{
	194	int res = EINVAL;
	195
	196	#if !VARIANT_DYLD
	197	if (key >= __pthread_tsd_first && key < __pthread_tsd_end) {
	198	bool created = _pthread_key_get_destructor(key, NULL);
	199	if (key < __pthread_tsd_start \|\| created) {
	200	struct _pthread *self = pthread_self();
	201	self->tsd[key] = (void *)value;
	202	res = 0;
	203
	204	if (key < __pthread_tsd_start) {
	205	// XXX: is this really necessary?
	206	_pthread_key_set_destructor(key, NULL);
	207	}
	208	if (key > self->max_tsd_key) {
	209	self->max_tsd_key = (uint16_t)key;
	210	}
	211	}
	212	}
	213	#endif // !VARIANT_DYLD
	214
	215	return res;
	216	}
	217
	218	int
	219	_pthread_setspecific_static(pthread_key_t key, void *value)
	220	{
	221	int res = EINVAL;
	222
	223	#if !VARIANT_DYLD
	224	if (key < __pthread_tsd_start) {
	225	_pthread_setspecific_direct(key, value);
	226	res = 0;
	227	}
	228	#endif // !VARIANT_DYLD
	229
	230	return res;
	231	}
	232
	233	void*
	234	pthread_getspecific(pthread_key_t key)
	235	{
	236	return _pthread_getspecific_direct(key);
	237	}
	238
	239	#if !VARIANT_DYLD
	240	static void
	241	_pthread_tsd_cleanup_key(pthread_t self, pthread_key_t key)
	242	{
	243	void (destructor)(void );
	244	if (_pthread_key_get_destructor(key, &destructor)) {
	245	void **ptr = &self->tsd[key];
	246	void value = ptr;
	247	if (value) {
	248	*ptr = NULL;
	249	if (destructor) {
	250	destructor(value);
	251	}
	252	}
	253	}
	254	}
	255	#endif // !VARIANT_DYLD
	256
	257	#if !VARIANT_DYLD
	258	static void
	259	_pthread_tsd_cleanup_new(pthread_t self)
	260	{
	261	int j;
	262
	263	// clean up all keys
	264	for (j = 0; j < PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
	265	pthread_key_t k;
	266	for (k = __pthread_tsd_start; k <= self->max_tsd_key; k++) {
	267	_pthread_tsd_cleanup_key(self, k);
	268	}
	269
	270	for (k = __pthread_tsd_first; k <= __pthread_tsd_max; k++) {
	271	_pthread_tsd_cleanup_key(self, k);
	272	}
	273	}
	274
	275	self->max_tsd_key = 0;
	276	}
	277
	278	#if PTHREAD_KEY_LEGACY_SUPPORT
	279	#import <_simple.h>
	280	#import <dlfcn.h>
	281	static void
	282	_pthread_tsd_behaviour_check(pthread_t self)
	283	{
	284	// Iterate from dynamic-key start to dynamic-key end, if the key has both
	285	// a desctructor and a value then _pthread_tsd_cleanup_key would cause
	286	// us to re-trigger the destructor.
	287	Dl_info i;
	288	pthread_key_t k;
	289
	290	for (k = __pthread_tsd_start; k < __pthread_tsd_end; k++) {
	291	void (destructor)(void );
	292	if (_pthread_key_get_destructor(k, &destructor)) {
	293	void **ptr = &self->tsd[k];
	294	void value = ptr;
	295	if (value && destructor) {
	296	_simple_asl_log(ASL_LEVEL_ERR, "pthread_tsd",
	297	"warning: dynamic tsd keys dirty after static key cleanup loop.");
	298
	299	if (dladdr(destructor, &i) == 0) {
	300	_simple_asl_log(ASL_LEVEL_ERR, "pthread_tsd", i.dli_fname);
	301	_simple_asl_log(ASL_LEVEL_ERR, "pthread_tsd", i.dli_saddr);
	302	}
	303	}
	304	}
	305	}
	306
	307	}
	308
	309	static void
	310	_pthread_tsd_cleanup_legacy(pthread_t self)
	311	{
	312	int j;
	313
	314	// clean up dynamic keys first
	315	for (j = 0; j < PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
	316	pthread_key_t k;
	317	for (k = __pthread_tsd_start; k <= self->max_tsd_key; k++) {
	318	_pthread_tsd_cleanup_key(self, k);
	319	}
	320	}
	321
	322	self->max_tsd_key = 0;
	323
	324	// clean up static keys
	325	for (j = 0; j < PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
	326	pthread_key_t k;
	327	for (k = __pthread_tsd_first; k <= __pthread_tsd_max; k++) {
	328	_pthread_tsd_cleanup_key(self, k);
	329	}
	330
	331	if (__pthread_key_legacy_behaviour_log != 0 && self->max_tsd_key != 0) {
	332	// max_tsd_key got dirtied, either by static or dynamic keys being
	333	// reset. check for any dirty dynamic keys.
	334	_pthread_tsd_behaviour_check(self);
	335	}
	336	}
	337	}
	338	#endif // PTHREAD_KEY_LEGACY_SUPPORT
	339	#endif // !VARIANT_DYLD
	340
	341	void
	342	_pthread_tsd_cleanup(pthread_t self)
	343	{
	344	#if !VARIANT_DYLD
	345
	346	// unless __pthread_key_legacy_behaviour == 1, use the new pthread key
	347	// destructor order: (dynamic -> static) x5 -> (GC x5)
	348
	349	if (__pthread_key_legacy_behaviour == 0) {
	350	_pthread_tsd_cleanup_new(self);
	351	} else {
	352	_pthread_tsd_cleanup_legacy(self);
	353	}
	354	#endif // !VARIANT_DYLD
	355	}
	356
	357	#if !VARIANT_DYLD
	358	// XXX: key should be pthread_key_t
	359	int
	360	pthread_key_init_np(int key, void (destructor)(void ))
	361	{
	362	int res = EINVAL; // Returns EINVAL if key is out of range.
	363	if (key >= __pthread_tsd_first && key < __pthread_tsd_start) {
	364	_PTHREAD_LOCK(__pthread_tsd_lock);
	365	_pthread_key_set_destructor(key, destructor);
	366	if (key > __pthread_tsd_max) {
	367	__pthread_tsd_max = key;
	368	}
	369	_PTHREAD_UNLOCK(__pthread_tsd_lock);
	370	res = 0;
	371	}
	372	return res;
	373	}
	374	#endif // !VARIANT_DYLD
	375
	376	#undef pthread_self
	377	pthread_t
	378	pthread_self(void)
	379	{
	380	return _pthread_getspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_SELF);
	381	}