| 1 | /* |
| 2 | * Copyright (c) 2000-2013 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 | */ |
| 51 | |
| 52 | #include "internal.h" |
| 53 | #include "private.h" |
| 54 | #include "workqueue_private.h" |
| 55 | #include "introspection_private.h" |
| 56 | #include "qos_private.h" |
| 57 | |
| 58 | #include <stdlib.h> |
| 59 | #include <errno.h> |
| 60 | #include <signal.h> |
| 61 | #include <unistd.h> |
| 62 | #include <mach/mach_init.h> |
| 63 | #include <mach/mach_vm.h> |
| 64 | #include <sys/time.h> |
| 65 | #include <sys/resource.h> |
| 66 | #include <sys/sysctl.h> |
| 67 | #include <sys/queue.h> |
| 68 | #include <sys/mman.h> |
| 69 | #include <machine/vmparam.h> |
| 70 | #define __APPLE_API_PRIVATE |
| 71 | #include <machine/cpu_capabilities.h> |
| 72 | #include <libkern/OSAtomic.h> |
| 73 | |
| 74 | #include <_simple.h> |
| 75 | #include <platform/string.h> |
| 76 | #include <platform/compat.h> |
| 77 | |
| 78 | extern int __sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, |
| 79 | void *newp, size_t newlen); |
| 80 | extern void __exit(int) __attribute__((noreturn)); |
| 81 | |
| 82 | static void (*exitf)(int) = __exit; |
| 83 | __private_extern__ void* (*_pthread_malloc)(size_t) = NULL; |
| 84 | __private_extern__ void (*_pthread_free)(void *) = NULL; |
| 85 | |
| 86 | // |
| 87 | // Global variables |
| 88 | // |
| 89 | |
| 90 | // This global should be used (carefully) by anyone needing to know if a |
| 91 | // pthread (other than the main thread) has been created. |
| 92 | int __is_threaded = 0; |
| 93 | |
| 94 | int __unix_conforming = 0; |
| 95 | |
| 96 | // _pthread_list_lock protects _pthread_count, access to the __pthread_head |
| 97 | // list, and the parentcheck, childrun and childexit flags of the pthread |
| 98 | // structure. Externally imported by pthread_cancelable.c. |
| 99 | __private_extern__ pthread_lock_t _pthread_list_lock = LOCK_INITIALIZER; |
| 100 | __private_extern__ struct __pthread_list __pthread_head = TAILQ_HEAD_INITIALIZER(__pthread_head); |
| 101 | static int _pthread_count = 1; |
| 102 | |
| 103 | #if PTHREAD_LAYOUT_SPI |
| 104 | |
| 105 | const struct pthread_layout_offsets_s pthread_layout_offsets = { |
| 106 | .plo_version = 1, |
| 107 | .plo_pthread_tsd_base_offset = offsetof(struct _pthread, tsd), |
| 108 | .plo_pthread_tsd_base_address_offset = 0, |
| 109 | .plo_pthread_tsd_entry_size = sizeof(((struct _pthread *)NULL)->tsd[0]), |
| 110 | }; |
| 111 | |
| 112 | #endif // PTHREAD_LAYOUT_SPI |
| 113 | |
| 114 | // |
| 115 | // Static variables |
| 116 | // |
| 117 | |
| 118 | // Mach message notification that a thread needs to be recycled. |
| 119 | typedef struct _pthread_reap_msg_t { |
| 120 | mach_msg_header_t header; |
| 121 | pthread_t thread; |
| 122 | mach_msg_trailer_t trailer; |
| 123 | } pthread_reap_msg_t; |
| 124 | |
| 125 | #define pthreadsize ((size_t)mach_vm_round_page(sizeof(struct _pthread))) |
| 126 | static pthread_attr_t _pthread_attr_default = {0}; |
| 127 | |
| 128 | // The main thread's pthread_t |
| 129 | static struct _pthread _thread __attribute__((aligned(4096))) = {0}; |
| 130 | |
| 131 | static int default_priority; |
| 132 | static int max_priority; |
| 133 | static int min_priority; |
| 134 | static int pthread_concurrency; |
| 135 | |
| 136 | // work queue support data |
| 137 | static void (*__libdispatch_workerfunction)(pthread_priority_t) = NULL; |
| 138 | static void (*__libdispatch_keventfunction)(void **events, int *nevents) = NULL; |
| 139 | static int __libdispatch_offset; |
| 140 | |
| 141 | // supported feature set |
| 142 | int __pthread_supported_features; |
| 143 | |
| 144 | // |
| 145 | // Function prototypes |
| 146 | // |
| 147 | |
| 148 | // pthread primitives |
| 149 | static int _pthread_allocate(pthread_t *thread, const pthread_attr_t *attrs, void **stack); |
| 150 | static int _pthread_deallocate(pthread_t t); |
| 151 | |
| 152 | static void _pthread_terminate(pthread_t t); |
| 153 | |
| 154 | static void _pthread_struct_init(pthread_t t, |
| 155 | const pthread_attr_t *attrs, |
| 156 | void *stack, |
| 157 | size_t stacksize, |
| 158 | int kernalloc); |
| 159 | |
| 160 | extern void _pthread_set_self(pthread_t); |
| 161 | |
| 162 | static void _pthread_dealloc_reply_port(pthread_t t); |
| 163 | |
| 164 | static inline void __pthread_add_thread(pthread_t t, bool parent); |
| 165 | static inline int __pthread_remove_thread(pthread_t t, bool child, bool *should_exit); |
| 166 | |
| 167 | static int _pthread_find_thread(pthread_t thread); |
| 168 | |
| 169 | static void _pthread_exit(pthread_t self, void *value_ptr) __dead2; |
| 170 | static void _pthread_setcancelstate_exit(pthread_t self, void *value_ptr, int conforming); |
| 171 | |
| 172 | static inline void _pthread_introspection_thread_create(pthread_t t, bool destroy); |
| 173 | static inline void _pthread_introspection_thread_start(pthread_t t); |
| 174 | static inline void _pthread_introspection_thread_terminate(pthread_t t, void *freeaddr, size_t freesize, bool destroy); |
| 175 | static inline void _pthread_introspection_thread_destroy(pthread_t t); |
| 176 | |
| 177 | extern void start_wqthread(pthread_t self, mach_port_t kport, void *stackaddr, void *unused, int reuse); // trampoline into _pthread_wqthread |
| 178 | extern void thread_start(pthread_t self, mach_port_t kport, void *(*fun)(void *), void * funarg, size_t stacksize, unsigned int flags); // trampoline into _pthread_start |
| 179 | |
| 180 | void pthread_workqueue_atfork_child(void); |
| 181 | |
| 182 | static bool __workq_newapi; |
| 183 | |
| 184 | /* Compatibility: previous pthread API used WORKQUEUE_OVERCOMMIT to request overcommit threads from |
| 185 | * the kernel. This definition is kept here, in userspace only, to perform the compatibility shimm |
| 186 | * from old API requests to the new kext conventions. |
| 187 | */ |
| 188 | #define WORKQUEUE_OVERCOMMIT 0x10000 |
| 189 | |
| 190 | /* |
| 191 | * Flags filed passed to bsdthread_create and back in pthread_start |
| 192 | 31 <---------------------------------> 0 |
| 193 | _________________________________________ |
| 194 | | flags(8) | policy(8) | importance(16) | |
| 195 | ----------------------------------------- |
| 196 | */ |
| 197 | |
| 198 | #define PTHREAD_START_CUSTOM 0x01000000 |
| 199 | #define PTHREAD_START_SETSCHED 0x02000000 |
| 200 | #define PTHREAD_START_DETACHED 0x04000000 |
| 201 | #define PTHREAD_START_QOSCLASS 0x08000000 |
| 202 | #define PTHREAD_START_QOSCLASS_MASK 0xffffff |
| 203 | #define PTHREAD_START_POLICY_BITSHIFT 16 |
| 204 | #define PTHREAD_START_POLICY_MASK 0xff |
| 205 | #define PTHREAD_START_IMPORTANCE_MASK 0xffff |
| 206 | |
| 207 | static int pthread_setschedparam_internal(pthread_t, mach_port_t, int, const struct sched_param *); |
| 208 | extern pthread_t __bsdthread_create(void *(*func)(void *), void * func_arg, void * stack, pthread_t thread, unsigned int flags); |
| 209 | extern int __bsdthread_register(void (*)(pthread_t, mach_port_t, void *(*)(void *), void *, size_t, unsigned int), void (*)(pthread_t, mach_port_t, void *, void *, int), int,void (*)(pthread_t, mach_port_t, void *(*)(void *), void *, size_t, unsigned int), int32_t *,__uint64_t); |
| 210 | extern int __bsdthread_terminate(void * freeaddr, size_t freesize, mach_port_t kport, mach_port_t joinsem); |
| 211 | extern __uint64_t __thread_selfid( void ); |
| 212 | extern int __pthread_canceled(int); |
| 213 | extern int __pthread_kill(mach_port_t, int); |
| 214 | |
| 215 | extern int __workq_open(void); |
| 216 | extern int __workq_kernreturn(int, void *, int, int); |
| 217 | |
| 218 | #if defined(__i386__) || defined(__x86_64__) |
| 219 | static const mach_vm_address_t PTHREAD_STACK_HINT = 0xB0000000; |
| 220 | #else |
| 221 | #error no PTHREAD_STACK_HINT for this architecture |
| 222 | #endif |
| 223 | |
| 224 | #if defined(__i386__) && defined(static_assert) |
| 225 | // Check for regression of <rdar://problem/13249323> |
| 226 | static_assert(offsetof(struct _pthread, err_no) == 68); |
| 227 | #endif |
| 228 | |
| 229 | // Allocate a thread structure, stack and guard page. |
| 230 | // |
| 231 | // The thread structure may optionally be placed in the same allocation as the |
| 232 | // stack, residing above the top of the stack. This cannot be done if a |
| 233 | // custom stack address is provided. |
| 234 | // |
| 235 | // Similarly the guard page cannot be allocated if a custom stack address is |
| 236 | // provided. |
| 237 | // |
| 238 | // The allocated thread structure is initialized with values that indicate how |
| 239 | // it should be freed. |
| 240 | |
| 241 | static int |
| 242 | _pthread_allocate(pthread_t *thread, const pthread_attr_t *attrs, void **stack) |
| 243 | { |
| 244 | int res; |
| 245 | kern_return_t kr; |
| 246 | pthread_t t = NULL; |
| 247 | mach_vm_address_t allocaddr = PTHREAD_STACK_HINT; |
| 248 | size_t allocsize = 0; |
| 249 | size_t guardsize = 0; |
| 250 | size_t stacksize = 0; |
| 251 | |
| 252 | PTHREAD_ASSERT(attrs->stacksize >= PTHREAD_STACK_MIN); |
| 253 | |
| 254 | *thread = NULL; |
| 255 | *stack = NULL; |
| 256 | |
| 257 | // Allocate a pthread structure if necessary |
| 258 | |
| 259 | if (attrs->stackaddr != NULL) { |
| 260 | PTHREAD_ASSERT(((uintptr_t)attrs->stackaddr % vm_page_size) == 0); |
| 261 | *stack = attrs->stackaddr; |
| 262 | allocsize = pthreadsize; |
| 263 | } else { |
| 264 | guardsize = attrs->guardsize; |
| 265 | stacksize = attrs->stacksize; |
| 266 | allocsize = stacksize + guardsize + pthreadsize; |
| 267 | } |
| 268 | |
| 269 | kr = mach_vm_map(mach_task_self(), |
| 270 | &allocaddr, |
| 271 | allocsize, |
| 272 | vm_page_size - 1, |
| 273 | VM_MAKE_TAG(VM_MEMORY_STACK)| VM_FLAGS_ANYWHERE, |
| 274 | MEMORY_OBJECT_NULL, |
| 275 | 0, |
| 276 | FALSE, |
| 277 | VM_PROT_DEFAULT, |
| 278 | VM_PROT_ALL, |
| 279 | VM_INHERIT_DEFAULT); |
| 280 | |
| 281 | if (kr != KERN_SUCCESS) { |
| 282 | kr = mach_vm_allocate(mach_task_self(), |
| 283 | &allocaddr, |
| 284 | allocsize, |
| 285 | VM_MAKE_TAG(VM_MEMORY_STACK)| VM_FLAGS_ANYWHERE); |
| 286 | } |
| 287 | |
| 288 | if (kr == KERN_SUCCESS) { |
| 289 | // The stack grows down. |
| 290 | // Set the guard page at the lowest address of the |
| 291 | // newly allocated stack. Return the highest address |
| 292 | // of the stack. |
| 293 | if (guardsize) { |
| 294 | (void)mach_vm_protect(mach_task_self(), allocaddr, guardsize, FALSE, VM_PROT_NONE); |
| 295 | } |
| 296 | |
| 297 | // Thread structure resides at the top of the stack. |
| 298 | t = (void *)(allocaddr + stacksize + guardsize); |
| 299 | if (stacksize) { |
| 300 | // Returns the top of the stack. |
| 301 | *stack = t; |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | if (t != NULL) { |
| 306 | _pthread_struct_init(t, attrs, *stack, attrs->stacksize, 0); |
| 307 | t->freeaddr = (void *)allocaddr; |
| 308 | t->freesize = allocsize; |
| 309 | *thread = t; |
| 310 | res = 0; |
| 311 | } else { |
| 312 | res = EAGAIN; |
| 313 | } |
| 314 | return res; |
| 315 | } |
| 316 | |
| 317 | static int |
| 318 | _pthread_deallocate(pthread_t t) |
| 319 | { |
| 320 | // Don't free the main thread. |
| 321 | if (t != &_thread) { |
| 322 | kern_return_t ret; |
| 323 | ret = mach_vm_deallocate(mach_task_self(), t->freeaddr, t->freesize); |
| 324 | PTHREAD_ASSERT(ret == KERN_SUCCESS); |
| 325 | } |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | // Terminates the thread if called from the currently running thread. |
| 330 | PTHREAD_NORETURN |
| 331 | static void |
| 332 | _pthread_terminate(pthread_t t) |
| 333 | { |
| 334 | PTHREAD_ASSERT(t == pthread_self()); |
| 335 | |
| 336 | uintptr_t freeaddr = (uintptr_t)t->freeaddr; |
| 337 | size_t freesize = t->freesize; |
| 338 | |
| 339 | mach_port_t kport = _pthread_kernel_thread(t); |
| 340 | semaphore_t joinsem = t->joiner_notify; |
| 341 | |
| 342 | _pthread_dealloc_reply_port(t); |
| 343 | |
| 344 | // If the pthread_t sticks around after the __bsdthread_terminate, we'll |
| 345 | // need to free it later |
| 346 | |
| 347 | // After the call to __pthread_remove_thread, it is only safe to |
| 348 | // dereference the pthread_t structure if EBUSY has been returned. |
| 349 | |
| 350 | bool destroy, should_exit; |
| 351 | destroy = (__pthread_remove_thread(t, true, &should_exit) != EBUSY); |
| 352 | |
| 353 | if (t == &_thread) { |
| 354 | // Don't free the main thread. |
| 355 | freesize = 0; |
| 356 | } else if (!destroy) { |
| 357 | // We were told to keep the pthread_t structure around. In the common |
| 358 | // case, the pthread structure itself is part of the allocation |
| 359 | // described by freeaddr/freesize, in which case we need to split and |
| 360 | // only deallocate the area below the pthread structure. In the event |
| 361 | // of a custom stack, the freeaddr/size will be the pthread structure |
| 362 | // itself, in which case we shouldn't free anything. |
| 363 | if ((void*)t > t->freeaddr && (void*)t < t->freeaddr + t->freesize){ |
| 364 | freesize = trunc_page((uintptr_t)t - (uintptr_t)freeaddr); |
| 365 | t->freeaddr += freesize; |
| 366 | t->freesize -= freesize; |
| 367 | } else { |
| 368 | freesize = 0; |
| 369 | } |
| 370 | } |
| 371 | if (freesize == 0) { |
| 372 | freeaddr = 0; |
| 373 | } |
| 374 | _pthread_introspection_thread_terminate(t, freeaddr, freesize, destroy); |
| 375 | if (should_exit) { |
| 376 | exitf(0); |
| 377 | } |
| 378 | |
| 379 | __bsdthread_terminate((void *)freeaddr, freesize, kport, joinsem); |
| 380 | PTHREAD_ABORT("thread %p didn't terminate", t); |
| 381 | } |
| 382 | |
| 383 | int |
| 384 | pthread_attr_destroy(pthread_attr_t *attr) |
| 385 | { |
| 386 | int ret = EINVAL; |
| 387 | if (attr->sig == _PTHREAD_ATTR_SIG) { |
| 388 | attr->sig = 0; |
| 389 | ret = 0; |
| 390 | } |
| 391 | return ret; |
| 392 | } |
| 393 | |
| 394 | int |
| 395 | pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachstate) |
| 396 | { |
| 397 | int ret = EINVAL; |
| 398 | if (attr->sig == _PTHREAD_ATTR_SIG) { |
| 399 | *detachstate = attr->detached; |
| 400 | ret = 0; |
| 401 | } |
| 402 | return ret; |
| 403 | } |
| 404 | |
| 405 | int |
| 406 | pthread_attr_getinheritsched(const pthread_attr_t *attr, int *inheritsched) |
| 407 | { |
| 408 | int ret = EINVAL; |
| 409 | if (attr->sig == _PTHREAD_ATTR_SIG) { |
| 410 | *inheritsched = attr->inherit; |
| 411 | ret = 0; |
| 412 | } |
| 413 | return ret; |
| 414 | } |
| 415 | |
| 416 | int |
| 417 | pthread_attr_getschedparam(const pthread_attr_t *attr, struct sched_param *param) |
| 418 | { |
| 419 | int ret = EINVAL; |
| 420 | if (attr->sig == _PTHREAD_ATTR_SIG) { |
| 421 | *param = attr->param; |
| 422 | ret = 0; |
| 423 | } |
| 424 | return ret; |
| 425 | } |
| 426 | |
| 427 | int |
| 428 | pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy) |
| 429 | { |
| 430 | int ret = EINVAL; |
| 431 | if (attr->sig == _PTHREAD_ATTR_SIG) { |
| 432 | *policy = attr->policy; |
| 433 | ret = 0; |
| 434 | } |
| 435 | return ret; |
| 436 | } |
| 437 | |
| 438 | // Default stack size is 512KB; independent of the main thread's stack size. |
| 439 | static const size_t DEFAULT_STACK_SIZE = 512 * 1024; |
| 440 | |
| 441 | int |
| 442 | pthread_attr_init(pthread_attr_t *attr) |
| 443 | { |
| 444 | attr->stacksize = DEFAULT_STACK_SIZE; |
| 445 | attr->stackaddr = NULL; |
| 446 | attr->sig = _PTHREAD_ATTR_SIG; |
| 447 | attr->param.sched_priority = default_priority; |
| 448 | attr->param.quantum = 10; /* quantum isn't public yet */ |
| 449 | attr->detached = PTHREAD_CREATE_JOINABLE; |
| 450 | attr->inherit = _PTHREAD_DEFAULT_INHERITSCHED; |
| 451 | attr->policy = _PTHREAD_DEFAULT_POLICY; |
| 452 | attr->fastpath = 1; |
| 453 | attr->schedset = 0; |
| 454 | attr->guardsize = vm_page_size; |
| 455 | attr->qosclass = _pthread_priority_make_newest(QOS_CLASS_DEFAULT, 0, 0); |
| 456 | return 0; |
| 457 | } |
| 458 | |
| 459 | int |
| 460 | pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate) |
| 461 | { |
| 462 | int ret = EINVAL; |
| 463 | if (attr->sig == _PTHREAD_ATTR_SIG && |
| 464 | (detachstate == PTHREAD_CREATE_JOINABLE || |
| 465 | detachstate == PTHREAD_CREATE_DETACHED)) { |
| 466 | attr->detached = detachstate; |
| 467 | ret = 0; |
| 468 | } |
| 469 | return ret; |
| 470 | } |
| 471 | |
| 472 | int |
| 473 | pthread_attr_setinheritsched(pthread_attr_t *attr, int inheritsched) |
| 474 | { |
| 475 | int ret = EINVAL; |
| 476 | if (attr->sig == _PTHREAD_ATTR_SIG && |
| 477 | (inheritsched == PTHREAD_INHERIT_SCHED || |
| 478 | inheritsched == PTHREAD_EXPLICIT_SCHED)) { |
| 479 | attr->inherit = inheritsched; |
| 480 | ret = 0; |
| 481 | } |
| 482 | return ret; |
| 483 | } |
| 484 | |
| 485 | int |
| 486 | pthread_attr_setschedparam(pthread_attr_t *attr, const struct sched_param *param) |
| 487 | { |
| 488 | int ret = EINVAL; |
| 489 | if (attr->sig == _PTHREAD_ATTR_SIG) { |
| 490 | /* TODO: Validate sched_param fields */ |
| 491 | attr->param = *param; |
| 492 | attr->schedset = 1; |
| 493 | ret = 0; |
| 494 | } |
| 495 | return ret; |
| 496 | } |
| 497 | |
| 498 | int |
| 499 | pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy) |
| 500 | { |
| 501 | int ret = EINVAL; |
| 502 | if (attr->sig == _PTHREAD_ATTR_SIG && |
| 503 | (policy == SCHED_OTHER || |
| 504 | policy == SCHED_RR || |
| 505 | policy == SCHED_FIFO)) { |
| 506 | attr->policy = policy; |
| 507 | attr->schedset = 1; |
| 508 | ret = 0; |
| 509 | } |
| 510 | return ret; |
| 511 | } |
| 512 | |
| 513 | int |
| 514 | pthread_attr_setscope(pthread_attr_t *attr, int scope) |
| 515 | { |
| 516 | int ret = EINVAL; |
| 517 | if (attr->sig == _PTHREAD_ATTR_SIG) { |
| 518 | if (scope == PTHREAD_SCOPE_SYSTEM) { |
| 519 | // No attribute yet for the scope. |
| 520 | ret = 0; |
| 521 | } else if (scope == PTHREAD_SCOPE_PROCESS) { |
| 522 | ret = ENOTSUP; |
| 523 | } |
| 524 | } |
| 525 | return ret; |
| 526 | } |
| 527 | |
| 528 | int |
| 529 | pthread_attr_getscope(const pthread_attr_t *attr, int *scope) |
| 530 | { |
| 531 | int ret = EINVAL; |
| 532 | if (attr->sig == _PTHREAD_ATTR_SIG) { |
| 533 | *scope = PTHREAD_SCOPE_SYSTEM; |
| 534 | ret = 0; |
| 535 | } |
| 536 | return ret; |
| 537 | } |
| 538 | |
| 539 | int |
| 540 | pthread_attr_getstackaddr(const pthread_attr_t *attr, void **stackaddr) |
| 541 | { |
| 542 | int ret = EINVAL; |
| 543 | if (attr->sig == _PTHREAD_ATTR_SIG) { |
| 544 | *stackaddr = attr->stackaddr; |
| 545 | ret = 0; |
| 546 | } |
| 547 | return ret; |
| 548 | } |
| 549 | |
| 550 | int |
| 551 | pthread_attr_setstackaddr(pthread_attr_t *attr, void *stackaddr) |
| 552 | { |
| 553 | int ret = EINVAL; |
| 554 | if (attr->sig == _PTHREAD_ATTR_SIG && |
| 555 | ((uintptr_t)stackaddr % vm_page_size) == 0) { |
| 556 | attr->stackaddr = stackaddr; |
| 557 | attr->fastpath = 0; |
| 558 | attr->guardsize = 0; |
| 559 | ret = 0; |
| 560 | } |
| 561 | return ret; |
| 562 | } |
| 563 | |
| 564 | int |
| 565 | pthread_attr_getstacksize(const pthread_attr_t *attr, size_t *stacksize) |
| 566 | { |
| 567 | int ret = EINVAL; |
| 568 | if (attr->sig == _PTHREAD_ATTR_SIG) { |
| 569 | *stacksize = attr->stacksize; |
| 570 | ret = 0; |
| 571 | } |
| 572 | return ret; |
| 573 | } |
| 574 | |
| 575 | int |
| 576 | pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize) |
| 577 | { |
| 578 | int ret = EINVAL; |
| 579 | if (attr->sig == _PTHREAD_ATTR_SIG && |
| 580 | (stacksize % vm_page_size) == 0 && |
| 581 | stacksize >= PTHREAD_STACK_MIN) { |
| 582 | attr->stacksize = stacksize; |
| 583 | ret = 0; |
| 584 | } |
| 585 | return ret; |
| 586 | } |
| 587 | |
| 588 | int |
| 589 | pthread_attr_getstack(const pthread_attr_t *attr, void **stackaddr, size_t * stacksize) |
| 590 | { |
| 591 | int ret = EINVAL; |
| 592 | if (attr->sig == _PTHREAD_ATTR_SIG) { |
| 593 | *stackaddr = (void *)((uintptr_t)attr->stackaddr - attr->stacksize); |
| 594 | *stacksize = attr->stacksize; |
| 595 | ret = 0; |
| 596 | } |
| 597 | return ret; |
| 598 | } |
| 599 | |
| 600 | // Per SUSv3, the stackaddr is the base address, the lowest addressable byte |
| 601 | // address. This is not the same as in pthread_attr_setstackaddr. |
| 602 | int |
| 603 | pthread_attr_setstack(pthread_attr_t *attr, void *stackaddr, size_t stacksize) |
| 604 | { |
| 605 | int ret = EINVAL; |
| 606 | if (attr->sig == _PTHREAD_ATTR_SIG && |
| 607 | ((uintptr_t)stackaddr % vm_page_size) == 0 && |
| 608 | (stacksize % vm_page_size) == 0 && |
| 609 | stacksize >= PTHREAD_STACK_MIN) { |
| 610 | attr->stackaddr = (void *)((uintptr_t)stackaddr + stacksize); |
| 611 | attr->stacksize = stacksize; |
| 612 | attr->fastpath = 0; |
| 613 | ret = 0; |
| 614 | } |
| 615 | return ret; |
| 616 | } |
| 617 | |
| 618 | int |
| 619 | pthread_attr_setguardsize(pthread_attr_t *attr, size_t guardsize) |
| 620 | { |
| 621 | int ret = EINVAL; |
| 622 | if (attr->sig == _PTHREAD_ATTR_SIG) { |
| 623 | /* Guardsize of 0 is valid, ot means no guard */ |
| 624 | if ((guardsize % vm_page_size) == 0) { |
| 625 | attr->guardsize = guardsize; |
| 626 | attr->fastpath = 0; |
| 627 | ret = 0; |
| 628 | } |
| 629 | } |
| 630 | return ret; |
| 631 | } |
| 632 | |
| 633 | int |
| 634 | pthread_attr_getguardsize(const pthread_attr_t *attr, size_t *guardsize) |
| 635 | { |
| 636 | int ret = EINVAL; |
| 637 | if (attr->sig == _PTHREAD_ATTR_SIG) { |
| 638 | *guardsize = attr->guardsize; |
| 639 | ret = 0; |
| 640 | } |
| 641 | return ret; |
| 642 | } |
| 643 | |
| 644 | |
| 645 | /* |
| 646 | * Create and start execution of a new thread. |
| 647 | */ |
| 648 | |
| 649 | static void |
| 650 | _pthread_body(pthread_t self) |
| 651 | { |
| 652 | _pthread_set_self(self); |
| 653 | __pthread_add_thread(self, false); |
| 654 | _pthread_exit(self, (self->fun)(self->arg)); |
| 655 | } |
| 656 | |
| 657 | void |
| 658 | _pthread_start(pthread_t self, mach_port_t kport, void *(*fun)(void *), void *arg, size_t stacksize, unsigned int pflags) |
| 659 | { |
| 660 | if ((pflags & PTHREAD_START_CUSTOM) == 0) { |
| 661 | uintptr_t stackaddr = self; |
| 662 | _pthread_struct_init(self, &_pthread_attr_default, stackaddr, stacksize, 1); |
| 663 | |
| 664 | if (pflags & PTHREAD_START_SETSCHED) { |
| 665 | self->policy = ((pflags >> PTHREAD_START_POLICY_BITSHIFT) & PTHREAD_START_POLICY_MASK); |
| 666 | self->param.sched_priority = (pflags & PTHREAD_START_IMPORTANCE_MASK); |
| 667 | } |
| 668 | |
| 669 | if ((pflags & PTHREAD_START_DETACHED) == PTHREAD_START_DETACHED) { |
| 670 | self->detached &= ~PTHREAD_CREATE_JOINABLE; |
| 671 | self->detached |= PTHREAD_CREATE_DETACHED; |
| 672 | } |
| 673 | } |
| 674 | |
| 675 | if ((pflags & PTHREAD_START_QOSCLASS) != 0) { |
| 676 | /* The QoS class is cached in the TSD of the pthread, so to reflect the |
| 677 | * class that the kernel brought us up at, the TSD must be primed from the |
| 678 | * flags parameter. |
| 679 | */ |
| 680 | self->tsd[_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS] = (pflags & PTHREAD_START_QOSCLASS_MASK); |
| 681 | } else { |
| 682 | /* Give the thread a default QoS tier, of zero. */ |
| 683 | self->tsd[_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS] = _pthread_priority_make_newest(QOS_CLASS_UNSPECIFIED, 0, 0); |
| 684 | } |
| 685 | |
| 686 | _pthread_set_kernel_thread(self, kport); |
| 687 | self->fun = fun; |
| 688 | self->arg = arg; |
| 689 | |
| 690 | _pthread_body(self); |
| 691 | } |
| 692 | |
| 693 | static void |
| 694 | _pthread_struct_init(pthread_t t, |
| 695 | const pthread_attr_t *attrs, |
| 696 | void *stackaddr, |
| 697 | size_t stacksize, |
| 698 | int kernalloc) |
| 699 | { |
| 700 | t->sig = _PTHREAD_SIG; |
| 701 | t->tsd[_PTHREAD_TSD_SLOT_PTHREAD_SELF] = t; |
| 702 | t->tsd[_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS] = _pthread_priority_make_newest(QOS_CLASS_UNSPECIFIED, 0, 0); |
| 703 | LOCK_INIT(t->lock); |
| 704 | |
| 705 | t->stacksize = stacksize; |
| 706 | t->stackaddr = stackaddr; |
| 707 | |
| 708 | t->kernalloc = kernalloc; |
| 709 | if (kernalloc){ |
| 710 | /* |
| 711 | * The pthread may be offset into a page. In that event, by contract |
| 712 | * with the kernel, the allocation will extend pthreadsize from the |
| 713 | * start of the next page. There's also one page worth of allocation |
| 714 | * below stacksize for the guard page. <rdar://problem/19941744> |
| 715 | */ |
| 716 | t->freeaddr = (stackaddr - stacksize) - vm_page_size; |
| 717 | t->freesize = (round_page((uintptr_t)stackaddr) + pthreadsize) - (uintptr_t)t->freeaddr; |
| 718 | } |
| 719 | |
| 720 | t->guardsize = attrs->guardsize; |
| 721 | t->detached = attrs->detached; |
| 722 | t->inherit = attrs->inherit; |
| 723 | t->policy = attrs->policy; |
| 724 | t->schedset = attrs->schedset; |
| 725 | t->param = attrs->param; |
| 726 | t->cancel_state = PTHREAD_CANCEL_ENABLE | PTHREAD_CANCEL_DEFERRED; |
| 727 | } |
| 728 | |
| 729 | /* Need to deprecate this in future */ |
| 730 | int |
| 731 | _pthread_is_threaded(void) |
| 732 | { |
| 733 | return __is_threaded; |
| 734 | } |
| 735 | |
| 736 | /* Non portable public api to know whether this process has(had) atleast one thread |
| 737 | * apart from main thread. There could be race if there is a thread in the process of |
| 738 | * creation at the time of call . It does not tell whether there are more than one thread |
| 739 | * at this point of time. |
| 740 | */ |
| 741 | int |
| 742 | pthread_is_threaded_np(void) |
| 743 | { |
| 744 | return __is_threaded; |
| 745 | } |
| 746 | |
| 747 | mach_port_t |
| 748 | pthread_mach_thread_np(pthread_t t) |
| 749 | { |
| 750 | mach_port_t kport = MACH_PORT_NULL; |
| 751 | |
| 752 | if (t == pthread_self()) { |
| 753 | /* |
| 754 | * If the call is on self, return the kernel port. We cannot |
| 755 | * add this bypass for main thread as it might have exited, |
| 756 | * and we should not return stale port info. |
| 757 | */ |
| 758 | kport = _pthread_kernel_thread(t); |
| 759 | } else { |
| 760 | (void)_pthread_lookup_thread(t, &kport, 0); |
| 761 | } |
| 762 | |
| 763 | return kport; |
| 764 | } |
| 765 | |
| 766 | pthread_t |
| 767 | pthread_from_mach_thread_np(mach_port_t kernel_thread) |
| 768 | { |
| 769 | struct _pthread *p = NULL; |
| 770 | |
| 771 | /* No need to wait as mach port is already known */ |
| 772 | LOCK(_pthread_list_lock); |
| 773 | |
| 774 | TAILQ_FOREACH(p, &__pthread_head, plist) { |
| 775 | if (_pthread_kernel_thread(p) == kernel_thread) { |
| 776 | break; |
| 777 | } |
| 778 | } |
| 779 | |
| 780 | UNLOCK(_pthread_list_lock); |
| 781 | |
| 782 | return p; |
| 783 | } |
| 784 | |
| 785 | size_t |
| 786 | pthread_get_stacksize_np(pthread_t t) |
| 787 | { |
| 788 | int ret; |
| 789 | size_t size = 0; |
| 790 | |
| 791 | if (t == NULL) { |
| 792 | return ESRCH; // XXX bug? |
| 793 | } |
| 794 | |
| 795 | // since the main thread will not get de-allocated from underneath us |
| 796 | if (t == pthread_self() || t == &_thread) { |
| 797 | return t->stacksize; |
| 798 | } |
| 799 | |
| 800 | LOCK(_pthread_list_lock); |
| 801 | |
| 802 | ret = _pthread_find_thread(t); |
| 803 | if (ret == 0) { |
| 804 | size = t->stacksize; |
| 805 | } else { |
| 806 | size = ret; // XXX bug? |
| 807 | } |
| 808 | |
| 809 | UNLOCK(_pthread_list_lock); |
| 810 | |
| 811 | return size; |
| 812 | } |
| 813 | |
| 814 | void * |
| 815 | pthread_get_stackaddr_np(pthread_t t) |
| 816 | { |
| 817 | int ret; |
| 818 | void *addr = NULL; |
| 819 | |
| 820 | if (t == NULL) { |
| 821 | return (void *)(uintptr_t)ESRCH; // XXX bug? |
| 822 | } |
| 823 | |
| 824 | // since the main thread will not get de-allocated from underneath us |
| 825 | if (t == pthread_self() || t == &_thread) { |
| 826 | return t->stackaddr; |
| 827 | } |
| 828 | |
| 829 | LOCK(_pthread_list_lock); |
| 830 | |
| 831 | ret = _pthread_find_thread(t); |
| 832 | if (ret == 0) { |
| 833 | addr = t->stackaddr; |
| 834 | } else { |
| 835 | addr = (void *)(uintptr_t)ret; // XXX bug? |
| 836 | } |
| 837 | |
| 838 | UNLOCK(_pthread_list_lock); |
| 839 | |
| 840 | return addr; |
| 841 | } |
| 842 | |
| 843 | static mach_port_t |
| 844 | _pthread_reply_port(pthread_t t) |
| 845 | { |
| 846 | void *p; |
| 847 | if (t == NULL) { |
| 848 | p = _pthread_getspecific_direct(_PTHREAD_TSD_SLOT_MIG_REPLY); |
| 849 | } else { |
| 850 | p = t->tsd[_PTHREAD_TSD_SLOT_MIG_REPLY]; |
| 851 | } |
| 852 | return (mach_port_t)(uintptr_t)p; |
| 853 | } |
| 854 | |
| 855 | static void |
| 856 | _pthread_set_reply_port(pthread_t t, mach_port_t reply_port) |
| 857 | { |
| 858 | void *p = (void *)(uintptr_t)reply_port; |
| 859 | if (t == NULL) { |
| 860 | _pthread_setspecific_direct(_PTHREAD_TSD_SLOT_MIG_REPLY, p); |
| 861 | } else { |
| 862 | t->tsd[_PTHREAD_TSD_SLOT_MIG_REPLY] = p; |
| 863 | } |
| 864 | } |
| 865 | |
| 866 | static void |
| 867 | _pthread_dealloc_reply_port(pthread_t t) |
| 868 | { |
| 869 | mach_port_t reply_port = _pthread_reply_port(t); |
| 870 | if (reply_port != MACH_PORT_NULL) { |
| 871 | mig_dealloc_reply_port(reply_port); |
| 872 | } |
| 873 | } |
| 874 | |
| 875 | pthread_t |
| 876 | pthread_main_thread_np(void) |
| 877 | { |
| 878 | return &_thread; |
| 879 | } |
| 880 | |
| 881 | /* returns non-zero if the current thread is the main thread */ |
| 882 | int |
| 883 | pthread_main_np(void) |
| 884 | { |
| 885 | pthread_t self = pthread_self(); |
| 886 | |
| 887 | return ((self->detached & _PTHREAD_CREATE_PARENT) == _PTHREAD_CREATE_PARENT); |
| 888 | } |
| 889 | |
| 890 | |
| 891 | /* if we are passed in a pthread_t that is NULL, then we return |
| 892 | the current thread's thread_id. So folks don't have to call |
| 893 | pthread_self, in addition to us doing it, if they just want |
| 894 | their thread_id. |
| 895 | */ |
| 896 | int |
| 897 | pthread_threadid_np(pthread_t thread, uint64_t *thread_id) |
| 898 | { |
| 899 | int res = 0; |
| 900 | pthread_t self = pthread_self(); |
| 901 | |
| 902 | if (thread_id == NULL) { |
| 903 | return EINVAL; |
| 904 | } |
| 905 | |
| 906 | if (thread == NULL || thread == self) { |
| 907 | *thread_id = self->thread_id; |
| 908 | } else { |
| 909 | LOCK(_pthread_list_lock); |
| 910 | res = _pthread_find_thread(thread); |
| 911 | if (res == 0) { |
| 912 | *thread_id = thread->thread_id; |
| 913 | } |
| 914 | UNLOCK(_pthread_list_lock); |
| 915 | } |
| 916 | return res; |
| 917 | } |
| 918 | |
| 919 | int |
| 920 | pthread_getname_np(pthread_t thread, char *threadname, size_t len) |
| 921 | { |
| 922 | int res; |
| 923 | |
| 924 | if (thread == NULL) { |
| 925 | return ESRCH; |
| 926 | } |
| 927 | |
| 928 | LOCK(_pthread_list_lock); |
| 929 | res = _pthread_find_thread(thread); |
| 930 | if (res == 0) { |
| 931 | strlcpy(threadname, thread->pthread_name, len); |
| 932 | } |
| 933 | UNLOCK(_pthread_list_lock); |
| 934 | return res; |
| 935 | } |
| 936 | |
| 937 | int |
| 938 | pthread_setname_np(const char *name) |
| 939 | { |
| 940 | int res; |
| 941 | pthread_t self = pthread_self(); |
| 942 | |
| 943 | size_t len = 0; |
| 944 | if (name != NULL) { |
| 945 | len = strlen(name); |
| 946 | } |
| 947 | |
| 948 | /* protytype is in pthread_internals.h */ |
| 949 | res = __proc_info(5, getpid(), 2, (uint64_t)0, (void*)name, (int)len); |
| 950 | if (res == 0) { |
| 951 | if (len > 0) { |
| 952 | strlcpy(self->pthread_name, name, MAXTHREADNAMESIZE); |
| 953 | } else { |
| 954 | bzero(self->pthread_name, MAXTHREADNAMESIZE); |
| 955 | } |
| 956 | } |
| 957 | return res; |
| 958 | |
| 959 | } |
| 960 | |
| 961 | PTHREAD_ALWAYS_INLINE |
| 962 | static inline void |
| 963 | __pthread_add_thread(pthread_t t, bool parent) |
| 964 | { |
| 965 | bool should_deallocate = false; |
| 966 | bool should_add = true; |
| 967 | |
| 968 | LOCK(_pthread_list_lock); |
| 969 | |
| 970 | // The parent and child threads race to add the thread to the list. |
| 971 | // When called by the parent: |
| 972 | // - set parentcheck to true |
| 973 | // - back off if childrun is true |
| 974 | // When called by the child: |
| 975 | // - set childrun to true |
| 976 | // - back off if parentcheck is true |
| 977 | if (parent) { |
| 978 | t->parentcheck = 1; |
| 979 | if (t->childrun) { |
| 980 | // child got here first, don't add. |
| 981 | should_add = false; |
| 982 | } |
| 983 | |
| 984 | // If the child exits before we check in then it has to keep |
| 985 | // the thread structure memory alive so our dereferences above |
| 986 | // are valid. If it's a detached thread, then no joiner will |
| 987 | // deallocate the thread structure itself. So we do it here. |
| 988 | if (t->childexit) { |
| 989 | should_add = false; |
| 990 | should_deallocate = ((t->detached & PTHREAD_CREATE_DETACHED) == PTHREAD_CREATE_DETACHED); |
| 991 | } |
| 992 | } else { |
| 993 | t->childrun = 1; |
| 994 | if (t->parentcheck) { |
| 995 | // Parent got here first, don't add. |
| 996 | should_add = false; |
| 997 | } |
| 998 | if (t->wqthread) { |
| 999 | // Work queue threads have no parent. Simulate. |
| 1000 | t->parentcheck = 1; |
| 1001 | } |
| 1002 | } |
| 1003 | |
| 1004 | if (should_add) { |
| 1005 | TAILQ_INSERT_TAIL(&__pthread_head, t, plist); |
| 1006 | _pthread_count++; |
| 1007 | } |
| 1008 | |
| 1009 | UNLOCK(_pthread_list_lock); |
| 1010 | |
| 1011 | if (parent) { |
| 1012 | _pthread_introspection_thread_create(t, should_deallocate); |
| 1013 | if (should_deallocate) { |
| 1014 | _pthread_deallocate(t); |
| 1015 | } |
| 1016 | } else { |
| 1017 | _pthread_introspection_thread_start(t); |
| 1018 | } |
| 1019 | } |
| 1020 | |
| 1021 | // <rdar://problem/12544957> must always inline this function to avoid epilogues |
| 1022 | // Returns EBUSY if the thread structure should be kept alive (is joinable). |
| 1023 | // Returns ESRCH if the thread structure is no longer valid (was detached). |
| 1024 | PTHREAD_ALWAYS_INLINE |
| 1025 | static inline int |
| 1026 | __pthread_remove_thread(pthread_t t, bool child, bool *should_exit) |
| 1027 | { |
| 1028 | int ret = 0; |
| 1029 | |
| 1030 | bool should_remove = true; |
| 1031 | |
| 1032 | LOCK(_pthread_list_lock); |
| 1033 | |
| 1034 | // When a thread removes itself: |
| 1035 | // - Set the childexit flag indicating that the thread has exited. |
| 1036 | // - Return false if parentcheck is zero (must keep structure) |
| 1037 | // - If the thread is joinable, keep it on the list so that |
| 1038 | // the join operation succeeds. Still decrement the running |
| 1039 | // thread count so that we exit if no threads are running. |
| 1040 | // - Update the running thread count. |
| 1041 | // When another thread removes a joinable thread: |
| 1042 | // - CAREFUL not to dereference the thread before verifying that the |
| 1043 | // reference is still valid using _pthread_find_thread(). |
| 1044 | // - Remove the thread from the list. |
| 1045 | |
| 1046 | if (child) { |
| 1047 | t->childexit = 1; |
| 1048 | if (t->parentcheck == 0) { |
| 1049 | ret = EBUSY; |
| 1050 | } |
| 1051 | if ((t->detached & PTHREAD_CREATE_JOINABLE) != 0) { |
| 1052 | ret = EBUSY; |
| 1053 | should_remove = false; |
| 1054 | } |
| 1055 | *should_exit = (--_pthread_count <= 0); |
| 1056 | } else { |
| 1057 | ret = _pthread_find_thread(t); |
| 1058 | if (ret == 0) { |
| 1059 | // If we found a thread but it's not joinable, bail. |
| 1060 | if ((t->detached & PTHREAD_CREATE_JOINABLE) == 0) { |
| 1061 | should_remove = false; |
| 1062 | ret = ESRCH; |
| 1063 | } |
| 1064 | } |
| 1065 | } |
| 1066 | if (should_remove) { |
| 1067 | TAILQ_REMOVE(&__pthread_head, t, plist); |
| 1068 | } |
| 1069 | |
| 1070 | UNLOCK(_pthread_list_lock); |
| 1071 | |
| 1072 | return ret; |
| 1073 | } |
| 1074 | |
| 1075 | int |
| 1076 | pthread_create(pthread_t *thread, |
| 1077 | const pthread_attr_t *attr, |
| 1078 | void *(*start_routine)(void *), |
| 1079 | void *arg) |
| 1080 | { |
| 1081 | pthread_t t = NULL; |
| 1082 | unsigned int flags = 0; |
| 1083 | |
| 1084 | pthread_attr_t *attrs = (pthread_attr_t *)attr; |
| 1085 | if (attrs == NULL) { |
| 1086 | attrs = &_pthread_attr_default; |
| 1087 | } else if (attrs->sig != _PTHREAD_ATTR_SIG) { |
| 1088 | return EINVAL; |
| 1089 | } |
| 1090 | |
| 1091 | if (attrs->detached == PTHREAD_CREATE_DETACHED) { |
| 1092 | flags |= PTHREAD_START_DETACHED; |
| 1093 | } |
| 1094 | |
| 1095 | if (attrs->schedset != 0) { |
| 1096 | flags |= PTHREAD_START_SETSCHED; |
| 1097 | flags |= ((attrs->policy & PTHREAD_START_POLICY_MASK) << PTHREAD_START_POLICY_BITSHIFT); |
| 1098 | flags |= (attrs->param.sched_priority & PTHREAD_START_IMPORTANCE_MASK); |
| 1099 | } else if (attrs->qosclass != 0) { |
| 1100 | flags |= PTHREAD_START_QOSCLASS; |
| 1101 | flags |= (attrs->qosclass & PTHREAD_START_QOSCLASS_MASK); |
| 1102 | } |
| 1103 | |
| 1104 | __is_threaded = 1; |
| 1105 | |
| 1106 | void *stack; |
| 1107 | |
| 1108 | if (attrs->fastpath) { |
| 1109 | // kernel will allocate thread and stack, pass stacksize. |
| 1110 | stack = (void *)attrs->stacksize; |
| 1111 | } else { |
| 1112 | // allocate the thread and its stack |
| 1113 | flags |= PTHREAD_START_CUSTOM; |
| 1114 | |
| 1115 | int res; |
| 1116 | res = _pthread_allocate(&t, attrs, &stack); |
| 1117 | if (res) { |
| 1118 | return res; |
| 1119 | } |
| 1120 | |
| 1121 | t->arg = arg; |
| 1122 | t->fun = start_routine; |
| 1123 | } |
| 1124 | |
| 1125 | pthread_t t2; |
| 1126 | t2 = __bsdthread_create(start_routine, arg, stack, t, flags); |
| 1127 | if (t2 == (pthread_t)-1) { |
| 1128 | if (flags & PTHREAD_START_CUSTOM) { |
| 1129 | // free the thread and stack if we allocated it |
| 1130 | _pthread_deallocate(t); |
| 1131 | } |
| 1132 | return EAGAIN; |
| 1133 | } |
| 1134 | if (t == NULL) { |
| 1135 | t = t2; |
| 1136 | } |
| 1137 | |
| 1138 | __pthread_add_thread(t, true); |
| 1139 | |
| 1140 | // XXX if a thread is created detached and exits, t will be invalid |
| 1141 | *thread = t; |
| 1142 | return 0; |
| 1143 | } |
| 1144 | |
| 1145 | int |
| 1146 | pthread_create_suspended_np(pthread_t *thread, |
| 1147 | const pthread_attr_t *attr, |
| 1148 | void *(*start_routine)(void *), |
| 1149 | void *arg) |
| 1150 | { |
| 1151 | int res; |
| 1152 | void *stack; |
| 1153 | mach_port_t kernel_thread = MACH_PORT_NULL; |
| 1154 | |
| 1155 | const pthread_attr_t *attrs = attr; |
| 1156 | if (attrs == NULL) { |
| 1157 | attrs = &_pthread_attr_default; |
| 1158 | } else if (attrs->sig != _PTHREAD_ATTR_SIG) { |
| 1159 | return EINVAL; |
| 1160 | } |
| 1161 | |
| 1162 | pthread_t t; |
| 1163 | res = _pthread_allocate(&t, attrs, &stack); |
| 1164 | if (res) { |
| 1165 | return res; |
| 1166 | } |
| 1167 | |
| 1168 | *thread = t; |
| 1169 | |
| 1170 | kern_return_t kr; |
| 1171 | kr = thread_create(mach_task_self(), &kernel_thread); |
| 1172 | if (kr != KERN_SUCCESS) { |
| 1173 | //PTHREAD_ABORT("thread_create() failed: %d", kern_res); |
| 1174 | return EINVAL; /* Need better error here? */ |
| 1175 | } |
| 1176 | |
| 1177 | _pthread_set_kernel_thread(t, kernel_thread); |
| 1178 | (void)pthread_setschedparam_internal(t, kernel_thread, t->policy, &t->param); |
| 1179 | |
| 1180 | __is_threaded = 1; |
| 1181 | |
| 1182 | t->arg = arg; |
| 1183 | t->fun = start_routine; |
| 1184 | |
| 1185 | __pthread_add_thread(t, true); |
| 1186 | |
| 1187 | // Set up a suspended thread. |
| 1188 | _pthread_setup(t, _pthread_body, stack, 1, 0); |
| 1189 | return res; |
| 1190 | } |
| 1191 | |
| 1192 | int |
| 1193 | pthread_detach(pthread_t thread) |
| 1194 | { |
| 1195 | int res; |
| 1196 | bool join = false; |
| 1197 | semaphore_t sema = SEMAPHORE_NULL; |
| 1198 | |
| 1199 | res = _pthread_lookup_thread(thread, NULL, 1); |
| 1200 | if (res) { |
| 1201 | return res; // Not a valid thread to detach. |
| 1202 | } |
| 1203 | |
| 1204 | LOCK(thread->lock); |
| 1205 | if (thread->detached & PTHREAD_CREATE_JOINABLE) { |
| 1206 | if (thread->detached & _PTHREAD_EXITED) { |
| 1207 | // Join the thread if it's already exited. |
| 1208 | join = true; |
| 1209 | } else { |
| 1210 | thread->detached &= ~PTHREAD_CREATE_JOINABLE; |
| 1211 | thread->detached |= PTHREAD_CREATE_DETACHED; |
| 1212 | sema = thread->joiner_notify; |
| 1213 | } |
| 1214 | } else { |
| 1215 | res = EINVAL; |
| 1216 | } |
| 1217 | UNLOCK(thread->lock); |
| 1218 | |
| 1219 | if (join) { |
| 1220 | pthread_join(thread, NULL); |
| 1221 | } else if (sema) { |
| 1222 | semaphore_signal(sema); |
| 1223 | } |
| 1224 | |
| 1225 | return res; |
| 1226 | } |
| 1227 | |
| 1228 | int |
| 1229 | pthread_kill(pthread_t th, int sig) |
| 1230 | { |
| 1231 | if (sig < 0 || sig > NSIG) { |
| 1232 | return EINVAL; |
| 1233 | } |
| 1234 | |
| 1235 | mach_port_t kport = MACH_PORT_NULL; |
| 1236 | if (_pthread_lookup_thread(th, &kport, 0) != 0) { |
| 1237 | return ESRCH; // Not a valid thread. |
| 1238 | } |
| 1239 | |
| 1240 | // Don't signal workqueue threads. |
| 1241 | if (th->wqthread != 0 && th->wqkillset == 0) { |
| 1242 | return ENOTSUP; |
| 1243 | } |
| 1244 | |
| 1245 | int ret = __pthread_kill(kport, sig); |
| 1246 | |
| 1247 | if (ret == -1) { |
| 1248 | ret = errno; |
| 1249 | } |
| 1250 | return ret; |
| 1251 | } |
| 1252 | |
| 1253 | int |
| 1254 | __pthread_workqueue_setkill(int enable) |
| 1255 | { |
| 1256 | pthread_t self = pthread_self(); |
| 1257 | |
| 1258 | LOCK(self->lock); |
| 1259 | self->wqkillset = enable ? 1 : 0; |
| 1260 | UNLOCK(self->lock); |
| 1261 | |
| 1262 | return 0; |
| 1263 | } |
| 1264 | |
| 1265 | static void * |
| 1266 | __pthread_get_exit_value(pthread_t t, int conforming) |
| 1267 | { |
| 1268 | const int flags = (PTHREAD_CANCEL_ENABLE|_PTHREAD_CANCEL_PENDING); |
| 1269 | void *value = t->exit_value; |
| 1270 | if (conforming) { |
| 1271 | if ((t->cancel_state & flags) == flags) { |
| 1272 | value = PTHREAD_CANCELED; |
| 1273 | } |
| 1274 | } |
| 1275 | return value; |
| 1276 | } |
| 1277 | |
| 1278 | /* For compatibility... */ |
| 1279 | |
| 1280 | pthread_t |
| 1281 | _pthread_self(void) { |
| 1282 | return pthread_self(); |
| 1283 | } |
| 1284 | |
| 1285 | /* |
| 1286 | * Terminate a thread. |
| 1287 | */ |
| 1288 | int __disable_threadsignal(int); |
| 1289 | |
| 1290 | PTHREAD_NORETURN |
| 1291 | static void |
| 1292 | _pthread_exit(pthread_t self, void *value_ptr) |
| 1293 | { |
| 1294 | struct __darwin_pthread_handler_rec *handler; |
| 1295 | |
| 1296 | // Disable signal delivery while we clean up |
| 1297 | __disable_threadsignal(1); |
| 1298 | |
| 1299 | // Set cancel state to disable and type to deferred |
| 1300 | _pthread_setcancelstate_exit(self, value_ptr, __unix_conforming); |
| 1301 | |
| 1302 | while ((handler = self->__cleanup_stack) != 0) { |
| 1303 | (handler->__routine)(handler->__arg); |
| 1304 | self->__cleanup_stack = handler->__next; |
| 1305 | } |
| 1306 | _pthread_tsd_cleanup(self); |
| 1307 | |
| 1308 | LOCK(self->lock); |
| 1309 | self->detached |= _PTHREAD_EXITED; |
| 1310 | self->exit_value = value_ptr; |
| 1311 | |
| 1312 | if ((self->detached & PTHREAD_CREATE_JOINABLE) && |
| 1313 | self->joiner_notify == SEMAPHORE_NULL) { |
| 1314 | self->joiner_notify = (semaphore_t)os_get_cached_semaphore(); |
| 1315 | } |
| 1316 | UNLOCK(self->lock); |
| 1317 | |
| 1318 | // Clear per-thread semaphore cache |
| 1319 | os_put_cached_semaphore(SEMAPHORE_NULL); |
| 1320 | |
| 1321 | _pthread_terminate(self); |
| 1322 | } |
| 1323 | |
| 1324 | void |
| 1325 | pthread_exit(void *value_ptr) |
| 1326 | { |
| 1327 | pthread_t self = pthread_self(); |
| 1328 | if (self->wqthread == 0) { |
| 1329 | _pthread_exit(self, value_ptr); |
| 1330 | } else { |
| 1331 | PTHREAD_ABORT("pthread_exit() may only be called against threads created via pthread_create()"); |
| 1332 | } |
| 1333 | } |
| 1334 | |
| 1335 | int |
| 1336 | pthread_getschedparam(pthread_t thread, |
| 1337 | int *policy, |
| 1338 | struct sched_param *param) |
| 1339 | { |
| 1340 | int ret; |
| 1341 | |
| 1342 | if (thread == NULL) { |
| 1343 | return ESRCH; |
| 1344 | } |
| 1345 | |
| 1346 | LOCK(_pthread_list_lock); |
| 1347 | |
| 1348 | ret = _pthread_find_thread(thread); |
| 1349 | if (ret == 0) { |
| 1350 | if (policy) { |
| 1351 | *policy = thread->policy; |
| 1352 | } |
| 1353 | if (param) { |
| 1354 | *param = thread->param; |
| 1355 | } |
| 1356 | } |
| 1357 | |
| 1358 | UNLOCK(_pthread_list_lock); |
| 1359 | |
| 1360 | return ret; |
| 1361 | } |
| 1362 | |
| 1363 | static int |
| 1364 | pthread_setschedparam_internal(pthread_t thread, |
| 1365 | mach_port_t kport, |
| 1366 | int policy, |
| 1367 | const struct sched_param *param) |
| 1368 | { |
| 1369 | policy_base_data_t bases; |
| 1370 | policy_base_t base; |
| 1371 | mach_msg_type_number_t count; |
| 1372 | kern_return_t ret; |
| 1373 | |
| 1374 | switch (policy) { |
| 1375 | case SCHED_OTHER: |
| 1376 | bases.ts.base_priority = param->sched_priority; |
| 1377 | base = (policy_base_t)&bases.ts; |
| 1378 | count = POLICY_TIMESHARE_BASE_COUNT; |
| 1379 | break; |
| 1380 | case SCHED_FIFO: |
| 1381 | bases.fifo.base_priority = param->sched_priority; |
| 1382 | base = (policy_base_t)&bases.fifo; |
| 1383 | count = POLICY_FIFO_BASE_COUNT; |
| 1384 | break; |
| 1385 | case SCHED_RR: |
| 1386 | bases.rr.base_priority = param->sched_priority; |
| 1387 | /* quantum isn't public yet */ |
| 1388 | bases.rr.quantum = param->quantum; |
| 1389 | base = (policy_base_t)&bases.rr; |
| 1390 | count = POLICY_RR_BASE_COUNT; |
| 1391 | break; |
| 1392 | default: |
| 1393 | return EINVAL; |
| 1394 | } |
| 1395 | ret = thread_policy(kport, policy, base, count, TRUE); |
| 1396 | return (ret != KERN_SUCCESS) ? EINVAL : 0; |
| 1397 | } |
| 1398 | |
| 1399 | int |
| 1400 | pthread_setschedparam(pthread_t t, int policy, const struct sched_param *param) |
| 1401 | { |
| 1402 | mach_port_t kport = MACH_PORT_NULL; |
| 1403 | int res; |
| 1404 | int bypass = 1; |
| 1405 | |
| 1406 | // since the main thread will not get de-allocated from underneath us |
| 1407 | if (t == pthread_self() || t == &_thread ) { |
| 1408 | kport = _pthread_kernel_thread(t); |
| 1409 | } else { |
| 1410 | bypass = 0; |
| 1411 | (void)_pthread_lookup_thread(t, &kport, 0); |
| 1412 | } |
| 1413 | |
| 1414 | res = pthread_setschedparam_internal(t, kport, policy, param); |
| 1415 | if (res == 0) { |
| 1416 | if (bypass == 0) { |
| 1417 | // Ensure the thread is still valid. |
| 1418 | LOCK(_pthread_list_lock); |
| 1419 | res = _pthread_find_thread(t); |
| 1420 | if (res == 0) { |
| 1421 | t->policy = policy; |
| 1422 | t->param = *param; |
| 1423 | } |
| 1424 | UNLOCK(_pthread_list_lock); |
| 1425 | } else { |
| 1426 | t->policy = policy; |
| 1427 | t->param = *param; |
| 1428 | } |
| 1429 | } |
| 1430 | return res; |
| 1431 | } |
| 1432 | |
| 1433 | int |
| 1434 | sched_get_priority_min(int policy) |
| 1435 | { |
| 1436 | return default_priority - 16; |
| 1437 | } |
| 1438 | |
| 1439 | int |
| 1440 | sched_get_priority_max(int policy) |
| 1441 | { |
| 1442 | return default_priority + 16; |
| 1443 | } |
| 1444 | |
| 1445 | int |
| 1446 | pthread_equal(pthread_t t1, pthread_t t2) |
| 1447 | { |
| 1448 | return (t1 == t2); |
| 1449 | } |
| 1450 | |
| 1451 | // Force LLVM not to optimise this to a call to __pthread_set_self, if it does |
| 1452 | // then _pthread_set_self won't be bound when secondary threads try and start up. |
| 1453 | PTHREAD_NOINLINE |
| 1454 | void |
| 1455 | _pthread_set_self(pthread_t p) |
| 1456 | { |
| 1457 | extern void __pthread_set_self(void *); |
| 1458 | |
| 1459 | if (p == NULL) { |
| 1460 | p = &_thread; |
| 1461 | } |
| 1462 | |
| 1463 | uint64_t tid = __thread_selfid(); |
| 1464 | if (tid == -1ull) { |
| 1465 | PTHREAD_ABORT("failed to set thread_id"); |
| 1466 | } |
| 1467 | |
| 1468 | p->tsd[_PTHREAD_TSD_SLOT_PTHREAD_SELF] = p; |
| 1469 | p->tsd[_PTHREAD_TSD_SLOT_ERRNO] = &p->err_no; |
| 1470 | p->thread_id = tid; |
| 1471 | __pthread_set_self(&p->tsd[0]); |
| 1472 | } |
| 1473 | |
| 1474 | struct _pthread_once_context { |
| 1475 | pthread_once_t *pthread_once; |
| 1476 | void (*routine)(void); |
| 1477 | }; |
| 1478 | |
| 1479 | static void |
| 1480 | __pthread_once_handler(void *context) |
| 1481 | { |
| 1482 | struct _pthread_once_context *ctx = context; |
| 1483 | pthread_cleanup_push((void*)__os_once_reset, &ctx->pthread_once->once); |
| 1484 | ctx->routine(); |
| 1485 | pthread_cleanup_pop(0); |
| 1486 | ctx->pthread_once->sig = _PTHREAD_ONCE_SIG; |
| 1487 | } |
| 1488 | |
| 1489 | int |
| 1490 | pthread_once(pthread_once_t *once_control, void (*init_routine)(void)) |
| 1491 | { |
| 1492 | struct _pthread_once_context ctx = { once_control, init_routine }; |
| 1493 | do { |
| 1494 | os_once(&once_control->once, &ctx, __pthread_once_handler); |
| 1495 | } while (once_control->sig == _PTHREAD_ONCE_SIG_init); |
| 1496 | return 0; |
| 1497 | } |
| 1498 | |
| 1499 | void |
| 1500 | _pthread_testcancel(pthread_t thread, int isconforming) |
| 1501 | { |
| 1502 | const int flags = (PTHREAD_CANCEL_ENABLE|_PTHREAD_CANCEL_PENDING); |
| 1503 | |
| 1504 | LOCK(thread->lock); |
| 1505 | bool canceled = ((thread->cancel_state & flags) == flags); |
| 1506 | UNLOCK(thread->lock); |
| 1507 | |
| 1508 | if (canceled) { |
| 1509 | pthread_exit(isconforming ? PTHREAD_CANCELED : 0); |
| 1510 | } |
| 1511 | } |
| 1512 | |
| 1513 | void |
| 1514 | _pthread_exit_if_canceled(int error) |
| 1515 | { |
| 1516 | if (__unix_conforming && ((error & 0xff) == EINTR) && (__pthread_canceled(0) == 0)) { |
| 1517 | pthread_t self = pthread_self(); |
| 1518 | if (self != NULL) { |
| 1519 | self->cancel_error = error; |
| 1520 | } |
| 1521 | pthread_exit(PTHREAD_CANCELED); |
| 1522 | } |
| 1523 | } |
| 1524 | |
| 1525 | int |
| 1526 | pthread_getconcurrency(void) |
| 1527 | { |
| 1528 | return pthread_concurrency; |
| 1529 | } |
| 1530 | |
| 1531 | int |
| 1532 | pthread_setconcurrency(int new_level) |
| 1533 | { |
| 1534 | if (new_level < 0) { |
| 1535 | return EINVAL; |
| 1536 | } |
| 1537 | pthread_concurrency = new_level; |
| 1538 | return 0; |
| 1539 | } |
| 1540 | |
| 1541 | void |
| 1542 | _pthread_set_pfz(uintptr_t address) |
| 1543 | { |
| 1544 | } |
| 1545 | |
| 1546 | #if !defined(PTHREAD_TARGET_EOS) && !defined(VARIANT_DYLD) |
| 1547 | void * |
| 1548 | malloc(size_t sz) |
| 1549 | { |
| 1550 | if (_pthread_malloc) { |
| 1551 | return _pthread_malloc(sz); |
| 1552 | } else { |
| 1553 | return NULL; |
| 1554 | } |
| 1555 | } |
| 1556 | |
| 1557 | void |
| 1558 | free(void *p) |
| 1559 | { |
| 1560 | if (_pthread_free) { |
| 1561 | _pthread_free(p); |
| 1562 | } |
| 1563 | } |
| 1564 | #endif |
| 1565 | |
| 1566 | /* |
| 1567 | * Perform package initialization - called automatically when application starts |
| 1568 | */ |
| 1569 | struct ProgramVars; /* forward reference */ |
| 1570 | |
| 1571 | int |
| 1572 | __pthread_init(const struct _libpthread_functions *pthread_funcs, const char *envp[] __unused, |
| 1573 | const char *apple[] __unused, const struct ProgramVars *vars __unused) |
| 1574 | { |
| 1575 | // Save our provided pushed-down functions |
| 1576 | if (pthread_funcs) { |
| 1577 | exitf = pthread_funcs->exit; |
| 1578 | |
| 1579 | if (pthread_funcs->version >= 2) { |
| 1580 | _pthread_malloc = pthread_funcs->malloc; |
| 1581 | _pthread_free = pthread_funcs->free; |
| 1582 | } |
| 1583 | } |
| 1584 | |
| 1585 | // |
| 1586 | // Get host information |
| 1587 | // |
| 1588 | |
| 1589 | kern_return_t kr; |
| 1590 | host_flavor_t flavor = HOST_PRIORITY_INFO; |
| 1591 | mach_msg_type_number_t count = HOST_PRIORITY_INFO_COUNT; |
| 1592 | host_priority_info_data_t priority_info; |
| 1593 | host_t host = mach_host_self(); |
| 1594 | kr = host_info(host, flavor, (host_info_t)&priority_info, &count); |
| 1595 | if (kr != KERN_SUCCESS) { |
| 1596 | PTHREAD_ABORT("host_info(mach_host_self(), ...) failed: %s", mach_error_string(kr)); |
| 1597 | } else { |
| 1598 | default_priority = priority_info.user_priority; |
| 1599 | min_priority = priority_info.minimum_priority; |
| 1600 | max_priority = priority_info.maximum_priority; |
| 1601 | } |
| 1602 | mach_port_deallocate(mach_task_self(), host); |
| 1603 | |
| 1604 | // |
| 1605 | // Set up the main thread structure |
| 1606 | // |
| 1607 | |
| 1608 | void *stackaddr; |
| 1609 | size_t stacksize = DFLSSIZ; |
| 1610 | size_t len = sizeof(stackaddr); |
| 1611 | int mib[] = { CTL_KERN, KERN_USRSTACK }; |
| 1612 | if (__sysctl(mib, 2, &stackaddr, &len, NULL, 0) != 0) { |
| 1613 | stackaddr = (void *)USRSTACK; |
| 1614 | } |
| 1615 | |
| 1616 | pthread_t thread = &_thread; |
| 1617 | pthread_attr_init(&_pthread_attr_default); |
| 1618 | _pthread_struct_init(thread, &_pthread_attr_default, stackaddr, stacksize, 0); |
| 1619 | thread->detached = PTHREAD_CREATE_JOINABLE; |
| 1620 | |
| 1621 | // Finish initialization with common code that is reinvoked on the |
| 1622 | // child side of a fork. |
| 1623 | |
| 1624 | // Finishes initialization of main thread attributes. |
| 1625 | // Initializes the thread list and add the main thread. |
| 1626 | // Calls _pthread_set_self() to prepare the main thread for execution. |
| 1627 | __pthread_fork_child_internal(thread); |
| 1628 | |
| 1629 | // Set up kernel entry points with __bsdthread_register. |
| 1630 | pthread_workqueue_atfork_child(); |
| 1631 | |
| 1632 | // Have pthread_key do its init envvar checks. |
| 1633 | _pthread_key_global_init(envp); |
| 1634 | |
| 1635 | return 0; |
| 1636 | } |
| 1637 | |
| 1638 | int |
| 1639 | sched_yield(void) |
| 1640 | { |
| 1641 | swtch_pri(0); |
| 1642 | return 0; |
| 1643 | } |
| 1644 | |
| 1645 | PTHREAD_NOEXPORT void |
| 1646 | __pthread_fork_child_internal(pthread_t p) |
| 1647 | { |
| 1648 | TAILQ_INIT(&__pthread_head); |
| 1649 | LOCK_INIT(_pthread_list_lock); |
| 1650 | |
| 1651 | // Re-use the main thread's static storage if no thread was provided. |
| 1652 | if (p == NULL) { |
| 1653 | if (_thread.tsd[0] != 0) { |
| 1654 | bzero(&_thread, sizeof(struct _pthread)); |
| 1655 | } |
| 1656 | p = &_thread; |
| 1657 | } |
| 1658 | |
| 1659 | LOCK_INIT(p->lock); |
| 1660 | _pthread_set_kernel_thread(p, mach_thread_self()); |
| 1661 | _pthread_set_reply_port(p, mach_reply_port()); |
| 1662 | p->__cleanup_stack = NULL; |
| 1663 | p->joiner_notify = SEMAPHORE_NULL; |
| 1664 | p->joiner = MACH_PORT_NULL; |
| 1665 | p->detached |= _PTHREAD_CREATE_PARENT; |
| 1666 | p->tsd[__TSD_SEMAPHORE_CACHE] = SEMAPHORE_NULL; |
| 1667 | |
| 1668 | // Initialize the list of threads with the new main thread. |
| 1669 | TAILQ_INSERT_HEAD(&__pthread_head, p, plist); |
| 1670 | _pthread_count = 1; |
| 1671 | |
| 1672 | _pthread_set_self(p); |
| 1673 | _pthread_introspection_thread_start(p); |
| 1674 | } |
| 1675 | |
| 1676 | /* |
| 1677 | * Query/update the cancelability 'state' of a thread |
| 1678 | */ |
| 1679 | PTHREAD_NOEXPORT int |
| 1680 | _pthread_setcancelstate_internal(int state, int *oldstate, int conforming) |
| 1681 | { |
| 1682 | pthread_t self; |
| 1683 | |
| 1684 | switch (state) { |
| 1685 | case PTHREAD_CANCEL_ENABLE: |
| 1686 | if (conforming) { |
| 1687 | __pthread_canceled(1); |
| 1688 | } |
| 1689 | break; |
| 1690 | case PTHREAD_CANCEL_DISABLE: |
| 1691 | if (conforming) { |
| 1692 | __pthread_canceled(2); |
| 1693 | } |
| 1694 | break; |
| 1695 | default: |
| 1696 | return EINVAL; |
| 1697 | } |
| 1698 | |
| 1699 | self = pthread_self(); |
| 1700 | LOCK(self->lock); |
| 1701 | if (oldstate) { |
| 1702 | *oldstate = self->cancel_state & _PTHREAD_CANCEL_STATE_MASK; |
| 1703 | } |
| 1704 | self->cancel_state &= ~_PTHREAD_CANCEL_STATE_MASK; |
| 1705 | self->cancel_state |= state; |
| 1706 | UNLOCK(self->lock); |
| 1707 | if (!conforming) { |
| 1708 | _pthread_testcancel(self, 0); /* See if we need to 'die' now... */ |
| 1709 | } |
| 1710 | return 0; |
| 1711 | } |
| 1712 | |
| 1713 | /* When a thread exits set the cancellation state to DISABLE and DEFERRED */ |
| 1714 | static void |
| 1715 | _pthread_setcancelstate_exit(pthread_t self, void * value_ptr, int conforming) |
| 1716 | { |
| 1717 | LOCK(self->lock); |
| 1718 | self->cancel_state &= ~(_PTHREAD_CANCEL_STATE_MASK | _PTHREAD_CANCEL_TYPE_MASK); |
| 1719 | self->cancel_state |= (PTHREAD_CANCEL_DISABLE | PTHREAD_CANCEL_DEFERRED); |
| 1720 | if (value_ptr == PTHREAD_CANCELED) { |
| 1721 | // 4597450: begin |
| 1722 | self->detached |= _PTHREAD_WASCANCEL; |
| 1723 | // 4597450: end |
| 1724 | } |
| 1725 | UNLOCK(self->lock); |
| 1726 | } |
| 1727 | |
| 1728 | int |
| 1729 | _pthread_join_cleanup(pthread_t thread, void ** value_ptr, int conforming) |
| 1730 | { |
| 1731 | // Returns ESRCH if the thread was not created joinable. |
| 1732 | int ret = __pthread_remove_thread(thread, false, NULL); |
| 1733 | if (ret != 0) { |
| 1734 | return ret; |
| 1735 | } |
| 1736 | |
| 1737 | if (value_ptr) { |
| 1738 | *value_ptr = __pthread_get_exit_value(thread, conforming); |
| 1739 | } |
| 1740 | _pthread_introspection_thread_destroy(thread); |
| 1741 | _pthread_deallocate(thread); |
| 1742 | return 0; |
| 1743 | } |
| 1744 | |
| 1745 | /* ALWAYS called with list lock and return with list lock */ |
| 1746 | int |
| 1747 | _pthread_find_thread(pthread_t thread) |
| 1748 | { |
| 1749 | if (thread != NULL) { |
| 1750 | pthread_t p; |
| 1751 | loop: |
| 1752 | TAILQ_FOREACH(p, &__pthread_head, plist) { |
| 1753 | if (p == thread) { |
| 1754 | if (_pthread_kernel_thread(thread) == MACH_PORT_NULL) { |
| 1755 | UNLOCK(_pthread_list_lock); |
| 1756 | sched_yield(); |
| 1757 | LOCK(_pthread_list_lock); |
| 1758 | goto loop; |
| 1759 | } |
| 1760 | return 0; |
| 1761 | } |
| 1762 | } |
| 1763 | } |
| 1764 | return ESRCH; |
| 1765 | } |
| 1766 | |
| 1767 | int |
| 1768 | _pthread_lookup_thread(pthread_t thread, mach_port_t *portp, int only_joinable) |
| 1769 | { |
| 1770 | mach_port_t kport = MACH_PORT_NULL; |
| 1771 | int ret; |
| 1772 | |
| 1773 | if (thread == NULL) { |
| 1774 | return ESRCH; |
| 1775 | } |
| 1776 | |
| 1777 | LOCK(_pthread_list_lock); |
| 1778 | |
| 1779 | ret = _pthread_find_thread(thread); |
| 1780 | if (ret == 0) { |
| 1781 | // Fail if we only want joinable threads and the thread found is |
| 1782 | // not in the detached state. |
| 1783 | if (only_joinable != 0 && (thread->detached & PTHREAD_CREATE_DETACHED) != 0) { |
| 1784 | ret = EINVAL; |
| 1785 | } else { |
| 1786 | kport = _pthread_kernel_thread(thread); |
| 1787 | } |
| 1788 | } |
| 1789 | |
| 1790 | UNLOCK(_pthread_list_lock); |
| 1791 | |
| 1792 | if (portp != NULL) { |
| 1793 | *portp = kport; |
| 1794 | } |
| 1795 | |
| 1796 | return ret; |
| 1797 | } |
| 1798 | |
| 1799 | void |
| 1800 | _pthread_clear_qos_tsd(mach_port_t thread_port) |
| 1801 | { |
| 1802 | if (thread_port == MACH_PORT_NULL || (uintptr_t)_pthread_getspecific_direct(_PTHREAD_TSD_SLOT_MACH_THREAD_SELF) == thread_port) { |
| 1803 | /* Clear the current thread's TSD, that can be done inline. */ |
| 1804 | _pthread_setspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS, _pthread_priority_make_newest(QOS_CLASS_UNSPECIFIED, 0, 0)); |
| 1805 | } else { |
| 1806 | pthread_t p; |
| 1807 | |
| 1808 | LOCK(_pthread_list_lock); |
| 1809 | |
| 1810 | TAILQ_FOREACH(p, &__pthread_head, plist) { |
| 1811 | mach_port_t kp = _pthread_kernel_thread(p); |
| 1812 | if (thread_port == kp) { |
| 1813 | p->tsd[_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS] = _pthread_priority_make_newest(QOS_CLASS_UNSPECIFIED, 0, 0); |
| 1814 | break; |
| 1815 | } |
| 1816 | } |
| 1817 | |
| 1818 | UNLOCK(_pthread_list_lock); |
| 1819 | } |
| 1820 | } |
| 1821 | |
| 1822 | /***** pthread workqueue support routines *****/ |
| 1823 | |
| 1824 | PTHREAD_NOEXPORT void |
| 1825 | pthread_workqueue_atfork_child(void) |
| 1826 | { |
| 1827 | struct _pthread_registration_data data = { |
| 1828 | .dispatch_queue_offset = __PTK_LIBDISPATCH_KEY0 * sizeof(void *), |
| 1829 | }; |
| 1830 | |
| 1831 | int rv = __bsdthread_register(thread_start, |
| 1832 | start_wqthread, |
| 1833 | (int)pthreadsize, |
| 1834 | (void*)&data, |
| 1835 | (uintptr_t)sizeof(data), |
| 1836 | data.dispatch_queue_offset); |
| 1837 | |
| 1838 | if (rv > 0) { |
| 1839 | __pthread_supported_features = rv; |
| 1840 | } |
| 1841 | |
| 1842 | if (_pthread_priority_get_qos_newest(data.main_qos) != QOS_CLASS_UNSPECIFIED) { |
| 1843 | _pthread_set_main_qos(data.main_qos); |
| 1844 | _thread.tsd[_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS] = data.main_qos; |
| 1845 | } |
| 1846 | |
| 1847 | if (__libdispatch_workerfunction != NULL) { |
| 1848 | // prepare the kernel for workq action |
| 1849 | (void)__workq_open(); |
| 1850 | } |
| 1851 | } |
| 1852 | |
| 1853 | // workqueue entry point from kernel |
| 1854 | void |
| 1855 | _pthread_wqthread(pthread_t self, mach_port_t kport, void *stacklowaddr, void *keventlist, int flags, int nkevents) |
| 1856 | { |
| 1857 | PTHREAD_ASSERT(flags & WQ_FLAG_THREAD_NEWSPI); |
| 1858 | |
| 1859 | int thread_reuse = flags & WQ_FLAG_THREAD_REUSE; |
| 1860 | int thread_class = flags & WQ_FLAG_THREAD_PRIOMASK; |
| 1861 | int overcommit = (flags & WQ_FLAG_THREAD_OVERCOMMIT) != 0; |
| 1862 | int kevent = flags & WQ_FLAG_THREAD_KEVENT; |
| 1863 | PTHREAD_ASSERT((!kevent) || (__libdispatch_keventfunction != NULL)); |
| 1864 | |
| 1865 | pthread_priority_t priority = 0; |
| 1866 | unsigned long priority_flags = 0; |
| 1867 | |
| 1868 | if (overcommit) |
| 1869 | priority_flags |= _PTHREAD_PRIORITY_OVERCOMMIT_FLAG; |
| 1870 | if (flags & WQ_FLAG_THREAD_EVENT_MANAGER) |
| 1871 | priority_flags |= _PTHREAD_PRIORITY_EVENT_MANAGER_FLAG; |
| 1872 | |
| 1873 | if ((__pthread_supported_features & PTHREAD_FEATURE_QOS_MAINTENANCE) == 0) { |
| 1874 | priority = _pthread_priority_make_version2(thread_class, 0, priority_flags); |
| 1875 | } else { |
| 1876 | priority = _pthread_priority_make_newest(thread_class, 0, priority_flags); |
| 1877 | } |
| 1878 | |
| 1879 | if (thread_reuse == 0) { |
| 1880 | // New thread created by kernel, needs initialization. |
| 1881 | size_t stacksize = (uintptr_t)self - (uintptr_t)stacklowaddr; |
| 1882 | _pthread_struct_init(self, &_pthread_attr_default, (void*)self, stacksize, 1); |
| 1883 | |
| 1884 | _pthread_set_kernel_thread(self, kport); |
| 1885 | self->wqthread = 1; |
| 1886 | self->wqkillset = 0; |
| 1887 | |
| 1888 | // Not a joinable thread. |
| 1889 | self->detached &= ~PTHREAD_CREATE_JOINABLE; |
| 1890 | self->detached |= PTHREAD_CREATE_DETACHED; |
| 1891 | |
| 1892 | // Update the running thread count and set childrun bit. |
| 1893 | // XXX this should be consolidated with pthread_body(). |
| 1894 | _pthread_set_self(self); |
| 1895 | _pthread_introspection_thread_create(self, false); |
| 1896 | __pthread_add_thread(self, false); |
| 1897 | } |
| 1898 | |
| 1899 | // If we're running with fine-grained priority, we also need to |
| 1900 | // set this thread to have the QoS class provided to use by the kernel |
| 1901 | if (__pthread_supported_features & PTHREAD_FEATURE_FINEPRIO) { |
| 1902 | _pthread_setspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS, _pthread_priority_make_newest(thread_class, 0, priority_flags)); |
| 1903 | } |
| 1904 | |
| 1905 | #if WQ_DEBUG |
| 1906 | PTHREAD_ASSERT(self); |
| 1907 | PTHREAD_ASSERT(self == pthread_self()); |
| 1908 | #endif // WQ_DEBUG |
| 1909 | |
| 1910 | if (kevent){ |
| 1911 | self->fun = (void *(*)(void*))__libdispatch_keventfunction; |
| 1912 | } else { |
| 1913 | self->fun = (void *(*)(void *))__libdispatch_workerfunction; |
| 1914 | } |
| 1915 | self->arg = (void *)(uintptr_t)thread_class; |
| 1916 | |
| 1917 | if (kevent && keventlist){ |
| 1918 | kevent_errors_retry: |
| 1919 | (*__libdispatch_keventfunction)(&keventlist, &nkevents); |
| 1920 | |
| 1921 | int errors_out = __workq_kernreturn(WQOPS_THREAD_KEVENT_RETURN, keventlist, nkevents, 0); |
| 1922 | if (errors_out > 0){ |
| 1923 | nkevents = errors_out; |
| 1924 | goto kevent_errors_retry; |
| 1925 | } else if (errors_out < 0){ |
| 1926 | PTHREAD_ABORT("kevent return produced an error: %d", errno); |
| 1927 | } |
| 1928 | _pthread_exit(self, NULL); |
| 1929 | } else if (kevent){ |
| 1930 | (*__libdispatch_keventfunction)(NULL, NULL); |
| 1931 | |
| 1932 | __workq_kernreturn(WQOPS_THREAD_RETURN, NULL, 0, 0); |
| 1933 | _pthread_exit(self, NULL); |
| 1934 | } |
| 1935 | |
| 1936 | if (__pthread_supported_features & PTHREAD_FEATURE_FINEPRIO) { |
| 1937 | if (!__workq_newapi) { |
| 1938 | /* Old thread priorities are inverted from where we have them in |
| 1939 | * the new flexible priority scheme. The highest priority is zero, |
| 1940 | * up to 2, with background at 3. |
| 1941 | */ |
| 1942 | pthread_workqueue_function_t func = (pthread_workqueue_function_t)__libdispatch_workerfunction; |
| 1943 | |
| 1944 | int opts = overcommit ? WORKQ_ADDTHREADS_OPTION_OVERCOMMIT : 0; |
| 1945 | |
| 1946 | if ((__pthread_supported_features & PTHREAD_FEATURE_QOS_DEFAULT) == 0) { |
| 1947 | /* Dirty hack to support kernels that don't have QOS_CLASS_DEFAULT. */ |
| 1948 | switch (thread_class) { |
| 1949 | case QOS_CLASS_USER_INTERACTIVE: |
| 1950 | thread_class = QOS_CLASS_USER_INITIATED; |
| 1951 | break; |
| 1952 | case QOS_CLASS_USER_INITIATED: |
| 1953 | thread_class = QOS_CLASS_DEFAULT; |
| 1954 | break; |
| 1955 | default: |
| 1956 | break; |
| 1957 | } |
| 1958 | } |
| 1959 | |
| 1960 | switch (thread_class) { |
| 1961 | /* QOS_CLASS_USER_INTERACTIVE is not currently requested by for old dispatch priority compatibility */ |
| 1962 | case QOS_CLASS_USER_INITIATED: |
| 1963 | (*func)(WORKQ_HIGH_PRIOQUEUE, opts, NULL); |
| 1964 | break; |
| 1965 | |
| 1966 | case QOS_CLASS_DEFAULT: |
| 1967 | /* B&I builders can't pass a QOS_CLASS_DEFAULT thread to dispatch, for fear of the QoS being |
| 1968 | * picked up by NSThread (et al) and transported around the system. So change the TSD to |
| 1969 | * make this thread look like QOS_CLASS_USER_INITIATED even though it will still run as legacy. |
| 1970 | */ |
| 1971 | _pthread_setspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS, _pthread_priority_make_newest(QOS_CLASS_USER_INITIATED, 0, 0)); |
| 1972 | (*func)(WORKQ_DEFAULT_PRIOQUEUE, opts, NULL); |
| 1973 | break; |
| 1974 | |
| 1975 | case QOS_CLASS_UTILITY: |
| 1976 | (*func)(WORKQ_LOW_PRIOQUEUE, opts, NULL); |
| 1977 | break; |
| 1978 | |
| 1979 | case QOS_CLASS_BACKGROUND: |
| 1980 | (*func)(WORKQ_BG_PRIOQUEUE, opts, NULL); |
| 1981 | break; |
| 1982 | |
| 1983 | /* Legacy dispatch does not use QOS_CLASS_MAINTENANCE, so no need to handle it here */ |
| 1984 | } |
| 1985 | |
| 1986 | } else { |
| 1987 | /* "New" API, where dispatch is expecting to be given the thread priority */ |
| 1988 | (*__libdispatch_workerfunction)(priority); |
| 1989 | } |
| 1990 | } else { |
| 1991 | /* We're the new library running on an old kext, so thread_class is really the workq priority. */ |
| 1992 | pthread_workqueue_function_t func = (pthread_workqueue_function_t)__libdispatch_workerfunction; |
| 1993 | int options = overcommit ? WORKQ_ADDTHREADS_OPTION_OVERCOMMIT : 0; |
| 1994 | (*func)(thread_class, options, NULL); |
| 1995 | } |
| 1996 | |
| 1997 | __workq_kernreturn(WQOPS_THREAD_RETURN, NULL, 0, 0); |
| 1998 | _pthread_exit(self, NULL); |
| 1999 | } |
| 2000 | |
| 2001 | /***** pthread workqueue API for libdispatch *****/ |
| 2002 | |
| 2003 | void |
| 2004 | pthread_workqueue_setdispatchoffset_np(int offset) |
| 2005 | { |
| 2006 | __libdispatch_offset = offset; |
| 2007 | } |
| 2008 | |
| 2009 | int |
| 2010 | pthread_workqueue_setdispatch_with_kevent_np(pthread_workqueue_function2_t queue_func, pthread_workqueue_function_kevent_t kevent_func) |
| 2011 | { |
| 2012 | int res = EBUSY; |
| 2013 | if (__libdispatch_workerfunction == NULL) { |
| 2014 | // Check whether the kernel supports new SPIs |
| 2015 | res = __workq_kernreturn(WQOPS_QUEUE_NEWSPISUPP, NULL, __libdispatch_offset, kevent_func != NULL ? 0x01 : 0x00); |
| 2016 | if (res == -1){ |
| 2017 | res = ENOTSUP; |
| 2018 | } else { |
| 2019 | __libdispatch_workerfunction = queue_func; |
| 2020 | __libdispatch_keventfunction = kevent_func; |
| 2021 | |
| 2022 | // Prepare the kernel for workq action |
| 2023 | (void)__workq_open(); |
| 2024 | if (__is_threaded == 0) { |
| 2025 | __is_threaded = 1; |
| 2026 | } |
| 2027 | } |
| 2028 | } |
| 2029 | return res; |
| 2030 | } |
| 2031 | |
| 2032 | int |
| 2033 | _pthread_workqueue_init_with_kevent(pthread_workqueue_function2_t queue_func, pthread_workqueue_function_kevent_t kevent_func, int offset, int flags) |
| 2034 | { |
| 2035 | if (flags != 0) { |
| 2036 | return ENOTSUP; |
| 2037 | } |
| 2038 | |
| 2039 | __workq_newapi = true; |
| 2040 | __libdispatch_offset = offset; |
| 2041 | |
| 2042 | int rv = pthread_workqueue_setdispatch_with_kevent_np(queue_func, kevent_func); |
| 2043 | return rv; |
| 2044 | } |
| 2045 | |
| 2046 | int |
| 2047 | _pthread_workqueue_init(pthread_workqueue_function2_t func, int offset, int flags) |
| 2048 | { |
| 2049 | return _pthread_workqueue_init_with_kevent(func, NULL, offset, flags); |
| 2050 | } |
| 2051 | |
| 2052 | int |
| 2053 | pthread_workqueue_setdispatch_np(pthread_workqueue_function_t worker_func) |
| 2054 | { |
| 2055 | return pthread_workqueue_setdispatch_with_kevent_np((pthread_workqueue_function2_t)worker_func, NULL); |
| 2056 | } |
| 2057 | |
| 2058 | int |
| 2059 | _pthread_workqueue_supported(void) |
| 2060 | { |
| 2061 | return __pthread_supported_features; |
| 2062 | } |
| 2063 | |
| 2064 | int |
| 2065 | pthread_workqueue_addthreads_np(int queue_priority, int options, int numthreads) |
| 2066 | { |
| 2067 | int res = 0; |
| 2068 | |
| 2069 | // Cannot add threads without a worker function registered. |
| 2070 | if (__libdispatch_workerfunction == NULL) { |
| 2071 | return EPERM; |
| 2072 | } |
| 2073 | |
| 2074 | pthread_priority_t kp = 0; |
| 2075 | |
| 2076 | if (__pthread_supported_features & PTHREAD_FEATURE_FINEPRIO) { |
| 2077 | /* The new kernel API takes the new QoS class + relative priority style of |
| 2078 | * priority. This entry point is here for compatibility with old libdispatch |
| 2079 | * versions (ie. the simulator). We request the corresponding new bracket |
| 2080 | * from the kernel, then on the way out run all dispatch queues that were |
| 2081 | * requested. |
| 2082 | */ |
| 2083 | |
| 2084 | int compat_priority = queue_priority & WQ_FLAG_THREAD_PRIOMASK; |
| 2085 | int flags = 0; |
| 2086 | |
| 2087 | /* To make sure the library does not issue more threads to dispatch than |
| 2088 | * were requested, the total number of active requests is recorded in |
| 2089 | * __workq_requests. |
| 2090 | */ |
| 2091 | if (options & WORKQ_ADDTHREADS_OPTION_OVERCOMMIT) { |
| 2092 | flags = _PTHREAD_PRIORITY_OVERCOMMIT_FLAG; |
| 2093 | } |
| 2094 | |
| 2095 | kp = _pthread_qos_class_encode_workqueue(compat_priority, flags); |
| 2096 | |
| 2097 | } else { |
| 2098 | /* Running on the old kernel, queue_priority is what we pass directly to |
| 2099 | * the syscall. |
| 2100 | */ |
| 2101 | kp = queue_priority & WQ_FLAG_THREAD_PRIOMASK; |
| 2102 | |
| 2103 | if (options & WORKQ_ADDTHREADS_OPTION_OVERCOMMIT) { |
| 2104 | kp |= WORKQUEUE_OVERCOMMIT; |
| 2105 | } |
| 2106 | } |
| 2107 | |
| 2108 | res = __workq_kernreturn(WQOPS_QUEUE_REQTHREADS, NULL, numthreads, (int)kp); |
| 2109 | if (res == -1) { |
| 2110 | res = errno; |
| 2111 | } |
| 2112 | return res; |
| 2113 | } |
| 2114 | |
| 2115 | int |
| 2116 | _pthread_workqueue_addthreads(int numthreads, pthread_priority_t priority) |
| 2117 | { |
| 2118 | int res = 0; |
| 2119 | |
| 2120 | if (__libdispatch_workerfunction == NULL) { |
| 2121 | return EPERM; |
| 2122 | } |
| 2123 | |
| 2124 | if ((__pthread_supported_features & PTHREAD_FEATURE_FINEPRIO) == 0) { |
| 2125 | return ENOTSUP; |
| 2126 | } |
| 2127 | |
| 2128 | res = __workq_kernreturn(WQOPS_QUEUE_REQTHREADS, NULL, numthreads, (int)priority); |
| 2129 | if (res == -1) { |
| 2130 | res = errno; |
| 2131 | } |
| 2132 | return res; |
| 2133 | } |
| 2134 | |
| 2135 | int |
| 2136 | _pthread_workqueue_set_event_manager_priority(pthread_priority_t priority) |
| 2137 | { |
| 2138 | int res = __workq_kernreturn(WQOPS_SET_EVENT_MANAGER_PRIORITY, NULL, (int)priority, 0); |
| 2139 | if (res == -1) { |
| 2140 | res = errno; |
| 2141 | } |
| 2142 | return res; |
| 2143 | } |
| 2144 | |
| 2145 | /* |
| 2146 | * Introspection SPI for libpthread. |
| 2147 | */ |
| 2148 | |
| 2149 | static pthread_introspection_hook_t _pthread_introspection_hook; |
| 2150 | |
| 2151 | pthread_introspection_hook_t |
| 2152 | pthread_introspection_hook_install(pthread_introspection_hook_t hook) |
| 2153 | { |
| 2154 | if (os_slowpath(!hook)) { |
| 2155 | PTHREAD_ABORT("pthread_introspection_hook_install was passed NULL"); |
| 2156 | } |
| 2157 | pthread_introspection_hook_t prev; |
| 2158 | prev = __sync_swap(&_pthread_introspection_hook, hook); |
| 2159 | return prev; |
| 2160 | } |
| 2161 | |
| 2162 | PTHREAD_NOINLINE |
| 2163 | static void |
| 2164 | _pthread_introspection_hook_callout_thread_create(pthread_t t, bool destroy) |
| 2165 | { |
| 2166 | _pthread_introspection_hook(PTHREAD_INTROSPECTION_THREAD_CREATE, t, t, |
| 2167 | pthreadsize); |
| 2168 | if (!destroy) return; |
| 2169 | _pthread_introspection_thread_destroy(t); |
| 2170 | } |
| 2171 | |
| 2172 | static inline void |
| 2173 | _pthread_introspection_thread_create(pthread_t t, bool destroy) |
| 2174 | { |
| 2175 | if (os_fastpath(!_pthread_introspection_hook)) return; |
| 2176 | _pthread_introspection_hook_callout_thread_create(t, destroy); |
| 2177 | } |
| 2178 | |
| 2179 | PTHREAD_NOINLINE |
| 2180 | static void |
| 2181 | _pthread_introspection_hook_callout_thread_start(pthread_t t) |
| 2182 | { |
| 2183 | size_t freesize; |
| 2184 | void *freeaddr; |
| 2185 | if (t == &_thread) { |
| 2186 | freesize = t->stacksize + t->guardsize; |
| 2187 | freeaddr = t->stackaddr - freesize; |
| 2188 | } else { |
| 2189 | freesize = t->freesize - pthreadsize; |
| 2190 | freeaddr = t->freeaddr; |
| 2191 | } |
| 2192 | _pthread_introspection_hook(PTHREAD_INTROSPECTION_THREAD_START, t, |
| 2193 | freeaddr, freesize); |
| 2194 | } |
| 2195 | |
| 2196 | static inline void |
| 2197 | _pthread_introspection_thread_start(pthread_t t) |
| 2198 | { |
| 2199 | if (os_fastpath(!_pthread_introspection_hook)) return; |
| 2200 | _pthread_introspection_hook_callout_thread_start(t); |
| 2201 | } |
| 2202 | |
| 2203 | PTHREAD_NOINLINE |
| 2204 | static void |
| 2205 | _pthread_introspection_hook_callout_thread_terminate(pthread_t t, |
| 2206 | void *freeaddr, size_t freesize, bool destroy) |
| 2207 | { |
| 2208 | if (destroy && freesize) { |
| 2209 | freesize -= pthreadsize; |
| 2210 | } |
| 2211 | _pthread_introspection_hook(PTHREAD_INTROSPECTION_THREAD_TERMINATE, t, |
| 2212 | freeaddr, freesize); |
| 2213 | if (!destroy) return; |
| 2214 | _pthread_introspection_thread_destroy(t); |
| 2215 | } |
| 2216 | |
| 2217 | static inline void |
| 2218 | _pthread_introspection_thread_terminate(pthread_t t, void *freeaddr, |
| 2219 | size_t freesize, bool destroy) |
| 2220 | { |
| 2221 | if (os_fastpath(!_pthread_introspection_hook)) return; |
| 2222 | _pthread_introspection_hook_callout_thread_terminate(t, freeaddr, freesize, |
| 2223 | destroy); |
| 2224 | } |
| 2225 | |
| 2226 | PTHREAD_NOINLINE |
| 2227 | static void |
| 2228 | _pthread_introspection_hook_callout_thread_destroy(pthread_t t) |
| 2229 | { |
| 2230 | if (t == &_thread) return; |
| 2231 | _pthread_introspection_hook(PTHREAD_INTROSPECTION_THREAD_DESTROY, t, t, |
| 2232 | pthreadsize); |
| 2233 | } |
| 2234 | |
| 2235 | static inline void |
| 2236 | _pthread_introspection_thread_destroy(pthread_t t) |
| 2237 | { |
| 2238 | if (os_fastpath(!_pthread_introspection_hook)) return; |
| 2239 | _pthread_introspection_hook_callout_thread_destroy(t); |
| 2240 | } |
| 2241 | |