1/* 2 * z_Linux_util.cpp -- platform specific routines. 3 */ 4 5//===----------------------------------------------------------------------===// 6// 7// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 8// See https://llvm.org/LICENSE.txt for license information. 9// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 10// 11//===----------------------------------------------------------------------===// 12 13#include "kmp.h" 14#include "kmp_affinity.h" 15#include "kmp_i18n.h" 16#include "kmp_io.h" 17#include "kmp_itt.h" 18#include "kmp_lock.h" 19#include "kmp_stats.h" 20#include "kmp_str.h" 21#include "kmp_wait_release.h" 22#include "kmp_wrapper_getpid.h" 23 24#if !KMP_OS_DRAGONFLY && !KMP_OS_FREEBSD && !KMP_OS_NETBSD && !KMP_OS_OPENBSD 25#include <alloca.h> 26#endif 27#include <math.h> // HUGE_VAL. 28#if KMP_OS_LINUX 29#include <semaphore.h> 30#endif // KMP_OS_LINUX 31#include <sys/resource.h> 32#if !KMP_OS_AIX 33#include <sys/syscall.h> 34#endif 35#include <sys/time.h> 36#include <sys/times.h> 37#include <unistd.h> 38 39#if KMP_OS_LINUX 40#include <sys/sysinfo.h> 41#if KMP_USE_FUTEX 42// We should really include <futex.h>, but that causes compatibility problems on 43// different Linux* OS distributions that either require that you include (or 44// break when you try to include) <pci/types.h>. Since all we need is the two 45// macros below (which are part of the kernel ABI, so can't change) we just 46// define the constants here and don't include <futex.h> 47#ifndef FUTEX_WAIT 48#define FUTEX_WAIT 0 49#endif 50#ifndef FUTEX_WAKE 51#define FUTEX_WAKE 1 52#endif 53#endif 54#elif KMP_OS_DARWIN 55#include <mach/mach.h> 56#include <sys/sysctl.h> 57#elif KMP_OS_DRAGONFLY || KMP_OS_FREEBSD 58#include <sys/types.h> 59#include <sys/sysctl.h> 60#include <sys/user.h> 61#include <pthread_np.h> 62#elif KMP_OS_NETBSD || KMP_OS_OPENBSD 63#include <sys/types.h> 64#include <sys/sysctl.h> 65#elif KMP_OS_SOLARIS 66#include <sys/loadavg.h> 67#endif 68 69#include <ctype.h> 70#include <dirent.h> 71#include <fcntl.h> 72 73struct kmp_sys_timer { 74 struct timespec start; 75}; 76 77#ifndef TIMEVAL_TO_TIMESPEC 78// Convert timeval to timespec. 79#define TIMEVAL_TO_TIMESPEC(tv, ts) \ 80 do { \ 81 (ts)->tv_sec = (tv)->tv_sec; \ 82 (ts)->tv_nsec = (tv)->tv_usec * 1000; \ 83 } while (0) 84#endif 85 86// Convert timespec to nanoseconds. 87#define TS2NS(timespec) \ 88 (((timespec).tv_sec * (long int)1e9) + (timespec).tv_nsec) 89 90static struct kmp_sys_timer __kmp_sys_timer_data; 91 92#if KMP_HANDLE_SIGNALS 93typedef void (*sig_func_t)(int); 94STATIC_EFI2_WORKAROUND struct sigaction __kmp_sighldrs[NSIG]; 95static sigset_t __kmp_sigset; 96#endif 97 98static int __kmp_init_runtime = FALSE; 99 100static int __kmp_fork_count = 0; 101 102static pthread_condattr_t __kmp_suspend_cond_attr; 103static pthread_mutexattr_t __kmp_suspend_mutex_attr; 104 105static kmp_cond_align_t __kmp_wait_cv; 106static kmp_mutex_align_t __kmp_wait_mx; 107 108kmp_uint64 __kmp_ticks_per_msec = 1000000; 109kmp_uint64 __kmp_ticks_per_usec = 1000; 110 111#ifdef DEBUG_SUSPEND 112static void __kmp_print_cond(char *buffer, kmp_cond_align_t *cond) { 113 KMP_SNPRINTF(buffer, 128, "(cond (lock (%ld, %d)), (descr (%p)))", 114 cond->c_cond.__c_lock.__status, cond->c_cond.__c_lock.__spinlock, 115 cond->c_cond.__c_waiting); 116} 117#endif 118 119#if ((KMP_OS_LINUX || KMP_OS_FREEBSD || KMP_OS_AIX) && KMP_AFFINITY_SUPPORTED) 120 121/* Affinity support */ 122 123void __kmp_affinity_bind_thread(int which) { 124 KMP_ASSERT2(KMP_AFFINITY_CAPABLE(), 125 "Illegal set affinity operation when not capable"); 126 127 kmp_affin_mask_t *mask; 128 KMP_CPU_ALLOC_ON_STACK(mask); 129 KMP_CPU_ZERO(mask); 130 KMP_CPU_SET(which, mask); 131 __kmp_set_system_affinity(mask, TRUE); 132 KMP_CPU_FREE_FROM_STACK(mask); 133} 134 135#if KMP_OS_AIX 136void __kmp_affinity_determine_capable(const char *env_var) { 137 // All versions of AIX support bindprocessor(). 138 139 size_t mask_size = __kmp_xproc / CHAR_BIT; 140 // Round up to byte boundary. 141 if (__kmp_xproc % CHAR_BIT) 142 ++mask_size; 143 144 // Round up to the mask_size_type boundary. 145 if (mask_size % sizeof(__kmp_affin_mask_size)) 146 mask_size += sizeof(__kmp_affin_mask_size) - 147 mask_size % sizeof(__kmp_affin_mask_size); 148 KMP_AFFINITY_ENABLE(mask_size); 149 KA_TRACE(10, 150 ("__kmp_affinity_determine_capable: " 151 "AIX OS affinity interface bindprocessor functional (mask size = " 152 "%" KMP_SIZE_T_SPEC ").\n", 153 __kmp_affin_mask_size)); 154} 155 156#else // !KMP_OS_AIX 157 158/* Determine if we can access affinity functionality on this version of 159 * Linux* OS by checking __NR_sched_{get,set}affinity system calls, and set 160 * __kmp_affin_mask_size to the appropriate value (0 means not capable). */ 161void __kmp_affinity_determine_capable(const char *env_var) { 162 // Check and see if the OS supports thread affinity. 163 164#if KMP_OS_LINUX 165#define KMP_CPU_SET_SIZE_LIMIT (1024 * 1024) 166#define KMP_CPU_SET_TRY_SIZE CACHE_LINE 167#elif KMP_OS_FREEBSD 168#define KMP_CPU_SET_SIZE_LIMIT (sizeof(cpuset_t)) 169#endif 170 171 int verbose = __kmp_affinity.flags.verbose; 172 int warnings = __kmp_affinity.flags.warnings; 173 enum affinity_type type = __kmp_affinity.type; 174 175#if KMP_OS_LINUX 176 long gCode; 177 unsigned char *buf; 178 buf = (unsigned char *)KMP_INTERNAL_MALLOC(KMP_CPU_SET_SIZE_LIMIT); 179 180 // If the syscall returns a suggestion for the size, 181 // then we don't have to search for an appropriate size. 182 gCode = syscall(__NR_sched_getaffinity, 0, KMP_CPU_SET_TRY_SIZE, buf); 183 KA_TRACE(30, ("__kmp_affinity_determine_capable: " 184 "initial getaffinity call returned %ld errno = %d\n", 185 gCode, errno)); 186 187 if (gCode < 0 && errno != EINVAL) { 188 // System call not supported 189 if (verbose || 190 (warnings && (type != affinity_none) && (type != affinity_default) && 191 (type != affinity_disabled))) { 192 int error = errno; 193 kmp_msg_t err_code = KMP_ERR(error); 194 __kmp_msg(kmp_ms_warning, KMP_MSG(GetAffSysCallNotSupported, env_var), 195 err_code, __kmp_msg_null); 196 if (__kmp_generate_warnings == kmp_warnings_off) { 197 __kmp_str_free(&err_code.str); 198 } 199 } 200 KMP_AFFINITY_DISABLE(); 201 KMP_INTERNAL_FREE(buf); 202 return; 203 } else if (gCode > 0) { 204 // The optimal situation: the OS returns the size of the buffer it expects. 205 KMP_AFFINITY_ENABLE(gCode); 206 KA_TRACE(10, ("__kmp_affinity_determine_capable: " 207 "affinity supported (mask size %d)\n", 208 (int)__kmp_affin_mask_size)); 209 KMP_INTERNAL_FREE(buf); 210 return; 211 } 212 213 // Call the getaffinity system call repeatedly with increasing set sizes 214 // until we succeed, or reach an upper bound on the search. 215 KA_TRACE(30, ("__kmp_affinity_determine_capable: " 216 "searching for proper set size\n")); 217 int size; 218 for (size = 1; size <= KMP_CPU_SET_SIZE_LIMIT; size *= 2) { 219 gCode = syscall(__NR_sched_getaffinity, 0, size, buf); 220 KA_TRACE(30, ("__kmp_affinity_determine_capable: " 221 "getaffinity for mask size %ld returned %ld errno = %d\n", 222 size, gCode, errno)); 223 224 if (gCode < 0) { 225 if (errno == ENOSYS) { 226 // We shouldn't get here 227 KA_TRACE(30, ("__kmp_affinity_determine_capable: " 228 "inconsistent OS call behavior: errno == ENOSYS for mask " 229 "size %d\n", 230 size)); 231 if (verbose || 232 (warnings && (type != affinity_none) && 233 (type != affinity_default) && (type != affinity_disabled))) { 234 int error = errno; 235 kmp_msg_t err_code = KMP_ERR(error); 236 __kmp_msg(kmp_ms_warning, KMP_MSG(GetAffSysCallNotSupported, env_var), 237 err_code, __kmp_msg_null); 238 if (__kmp_generate_warnings == kmp_warnings_off) { 239 __kmp_str_free(&err_code.str); 240 } 241 } 242 KMP_AFFINITY_DISABLE(); 243 KMP_INTERNAL_FREE(buf); 244 return; 245 } 246 continue; 247 } 248 249 KMP_AFFINITY_ENABLE(gCode); 250 KA_TRACE(10, ("__kmp_affinity_determine_capable: " 251 "affinity supported (mask size %d)\n", 252 (int)__kmp_affin_mask_size)); 253 KMP_INTERNAL_FREE(buf); 254 return; 255 } 256#elif KMP_OS_FREEBSD 257 long gCode; 258 unsigned char *buf; 259 buf = (unsigned char *)KMP_INTERNAL_MALLOC(KMP_CPU_SET_SIZE_LIMIT); 260 gCode = pthread_getaffinity_np(pthread_self(), KMP_CPU_SET_SIZE_LIMIT, 261 reinterpret_cast<cpuset_t *>(buf)); 262 KA_TRACE(30, ("__kmp_affinity_determine_capable: " 263 "initial getaffinity call returned %d errno = %d\n", 264 gCode, errno)); 265 if (gCode == 0) { 266 KMP_AFFINITY_ENABLE(KMP_CPU_SET_SIZE_LIMIT); 267 KA_TRACE(10, ("__kmp_affinity_determine_capable: " 268 "affinity supported (mask size %d)\n", 269 (int)__kmp_affin_mask_size)); 270 KMP_INTERNAL_FREE(buf); 271 return; 272 } 273#endif 274 KMP_INTERNAL_FREE(buf); 275 276 // Affinity is not supported 277 KMP_AFFINITY_DISABLE(); 278 KA_TRACE(10, ("__kmp_affinity_determine_capable: " 279 "cannot determine mask size - affinity not supported\n")); 280 if (verbose || (warnings && (type != affinity_none) && 281 (type != affinity_default) && (type != affinity_disabled))) { 282 KMP_WARNING(AffCantGetMaskSize, env_var); 283 } 284} 285#endif // KMP_OS_AIX 286#endif // (KMP_OS_LINUX || KMP_OS_FREEBSD || KMP_OS_AIX) && 287 // KMP_AFFINITY_SUPPORTED 288 289#if KMP_USE_FUTEX 290 291int __kmp_futex_determine_capable() { 292 int loc = 0; 293 long rc = syscall(__NR_futex, &loc, FUTEX_WAKE, 1, NULL, NULL, 0); 294 int retval = (rc == 0) || (errno != ENOSYS); 295 296 KA_TRACE(10, 297 ("__kmp_futex_determine_capable: rc = %d errno = %d\n", rc, errno)); 298 KA_TRACE(10, ("__kmp_futex_determine_capable: futex syscall%s supported\n", 299 retval ? "" : " not")); 300 301 return retval; 302} 303 304#endif // KMP_USE_FUTEX 305 306#if (KMP_ARCH_X86 || KMP_ARCH_X86_64 || KMP_ARCH_WASM) && (!KMP_ASM_INTRINS) 307/* Only 32-bit "add-exchange" instruction on IA-32 architecture causes us to 308 use compare_and_store for these routines */ 309 310kmp_int8 __kmp_test_then_or8(volatile kmp_int8 *p, kmp_int8 d) { 311 kmp_int8 old_value, new_value; 312 313 old_value = TCR_1(*p); 314 new_value = old_value | d; 315 316 while (!KMP_COMPARE_AND_STORE_REL8(p, old_value, new_value)) { 317 KMP_CPU_PAUSE(); 318 old_value = TCR_1(*p); 319 new_value = old_value | d; 320 } 321 return old_value; 322} 323 324kmp_int8 __kmp_test_then_and8(volatile kmp_int8 *p, kmp_int8 d) { 325 kmp_int8 old_value, new_value; 326 327 old_value = TCR_1(*p); 328 new_value = old_value & d; 329 330 while (!KMP_COMPARE_AND_STORE_REL8(p, old_value, new_value)) { 331 KMP_CPU_PAUSE(); 332 old_value = TCR_1(*p); 333 new_value = old_value & d; 334 } 335 return old_value; 336} 337 338kmp_uint32 __kmp_test_then_or32(volatile kmp_uint32 *p, kmp_uint32 d) { 339 kmp_uint32 old_value, new_value; 340 341 old_value = TCR_4(*p); 342 new_value = old_value | d; 343 344 while (!KMP_COMPARE_AND_STORE_REL32(p, old_value, new_value)) { 345 KMP_CPU_PAUSE(); 346 old_value = TCR_4(*p); 347 new_value = old_value | d; 348 } 349 return old_value; 350} 351 352kmp_uint32 __kmp_test_then_and32(volatile kmp_uint32 *p, kmp_uint32 d) { 353 kmp_uint32 old_value, new_value; 354 355 old_value = TCR_4(*p); 356 new_value = old_value & d; 357 358 while (!KMP_COMPARE_AND_STORE_REL32(p, old_value, new_value)) { 359 KMP_CPU_PAUSE(); 360 old_value = TCR_4(*p); 361 new_value = old_value & d; 362 } 363 return old_value; 364} 365 366#if KMP_ARCH_X86 || KMP_ARCH_WASM 367kmp_int8 __kmp_test_then_add8(volatile kmp_int8 *p, kmp_int8 d) { 368 kmp_int8 old_value, new_value; 369 370 old_value = TCR_1(*p); 371 new_value = old_value + d; 372 373 while (!KMP_COMPARE_AND_STORE_REL8(p, old_value, new_value)) { 374 KMP_CPU_PAUSE(); 375 old_value = TCR_1(*p); 376 new_value = old_value + d; 377 } 378 return old_value; 379} 380 381kmp_int64 __kmp_test_then_add64(volatile kmp_int64 *p, kmp_int64 d) { 382 kmp_int64 old_value, new_value; 383 384 old_value = TCR_8(*p); 385 new_value = old_value + d; 386 387 while (!KMP_COMPARE_AND_STORE_REL64(p, old_value, new_value)) { 388 KMP_CPU_PAUSE(); 389 old_value = TCR_8(*p); 390 new_value = old_value + d; 391 } 392 return old_value; 393} 394#endif /* KMP_ARCH_X86 */ 395 396kmp_uint64 __kmp_test_then_or64(volatile kmp_uint64 *p, kmp_uint64 d) { 397 kmp_uint64 old_value, new_value; 398 399 old_value = TCR_8(*p); 400 new_value = old_value | d; 401 while (!KMP_COMPARE_AND_STORE_REL64(p, old_value, new_value)) { 402 KMP_CPU_PAUSE(); 403 old_value = TCR_8(*p); 404 new_value = old_value | d; 405 } 406 return old_value; 407} 408 409kmp_uint64 __kmp_test_then_and64(volatile kmp_uint64 *p, kmp_uint64 d) { 410 kmp_uint64 old_value, new_value; 411 412 old_value = TCR_8(*p); 413 new_value = old_value & d; 414 while (!KMP_COMPARE_AND_STORE_REL64(p, old_value, new_value)) { 415 KMP_CPU_PAUSE(); 416 old_value = TCR_8(*p); 417 new_value = old_value & d; 418 } 419 return old_value; 420} 421 422#endif /* (KMP_ARCH_X86 || KMP_ARCH_X86_64) && (! KMP_ASM_INTRINS) */ 423 424void __kmp_terminate_thread(int gtid) { 425 int status; 426 kmp_info_t *th = __kmp_threads[gtid]; 427 428 if (!th) 429 return; 430 431#ifdef KMP_CANCEL_THREADS 432 KA_TRACE(10, ("__kmp_terminate_thread: kill (%d)\n", gtid)); 433 status = pthread_cancel(th->th.th_info.ds.ds_thread); 434 if (status != 0 && status != ESRCH) { 435 __kmp_fatal(KMP_MSG(CantTerminateWorkerThread), KMP_ERR(status), 436 __kmp_msg_null); 437 } 438#endif 439 KMP_YIELD(TRUE); 440} // 441 442/* Set thread stack info according to values returned by pthread_getattr_np(). 443 If values are unreasonable, assume call failed and use incremental stack 444 refinement method instead. Returns TRUE if the stack parameters could be 445 determined exactly, FALSE if incremental refinement is necessary. */ 446static kmp_int32 __kmp_set_stack_info(int gtid, kmp_info_t *th) { 447 int stack_data; 448#if KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD || \ 449 KMP_OS_HURD || KMP_OS_SOLARIS || KMP_OS_AIX 450 pthread_attr_t attr; 451 int status; 452 size_t size = 0; 453 void *addr = 0; 454 455 /* Always do incremental stack refinement for ubermaster threads since the 456 initial thread stack range can be reduced by sibling thread creation so 457 pthread_attr_getstack may cause thread gtid aliasing */ 458 if (!KMP_UBER_GTID(gtid)) { 459 460 /* Fetch the real thread attributes */ 461 status = pthread_attr_init(&attr); 462 KMP_CHECK_SYSFAIL("pthread_attr_init", status); 463#if KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD 464 status = pthread_attr_get_np(pthread_self(), &attr); 465 KMP_CHECK_SYSFAIL("pthread_attr_get_np", status); 466#else 467 status = pthread_getattr_np(pthread_self(), &attr); 468 KMP_CHECK_SYSFAIL("pthread_getattr_np", status); 469#endif 470 status = pthread_attr_getstack(&attr, &addr, &size); 471 KMP_CHECK_SYSFAIL("pthread_attr_getstack", status); 472 KA_TRACE(60, 473 ("__kmp_set_stack_info: T#%d pthread_attr_getstack returned size:" 474 " %lu, low addr: %p\n", 475 gtid, size, addr)); 476 status = pthread_attr_destroy(&attr); 477 KMP_CHECK_SYSFAIL("pthread_attr_destroy", status); 478 } 479 480 if (size != 0 && addr != 0) { // was stack parameter determination successful? 481 /* Store the correct base and size */ 482 TCW_PTR(th->th.th_info.ds.ds_stackbase, (((char *)addr) + size)); 483 TCW_PTR(th->th.th_info.ds.ds_stacksize, size); 484 TCW_4(th->th.th_info.ds.ds_stackgrow, FALSE); 485 return TRUE; 486 } 487#endif /* KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD \ 488 || KMP_OS_HURD || KMP_OS_SOLARIS */ 489 /* Use incremental refinement starting from initial conservative estimate */ 490 TCW_PTR(th->th.th_info.ds.ds_stacksize, 0); 491 TCW_PTR(th->th.th_info.ds.ds_stackbase, &stack_data); 492 TCW_4(th->th.th_info.ds.ds_stackgrow, TRUE); 493 return FALSE; 494} 495 496static void *__kmp_launch_worker(void *thr) { 497 int status, old_type, old_state; 498#ifdef KMP_BLOCK_SIGNALS 499 sigset_t new_set, old_set; 500#endif /* KMP_BLOCK_SIGNALS */ 501 void *exit_val; 502#if KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD || \ 503 KMP_OS_OPENBSD || KMP_OS_HURD || KMP_OS_SOLARIS || KMP_OS_AIX 504 void *volatile padding = 0; 505#endif 506 int gtid; 507 508 gtid = ((kmp_info_t *)thr)->th.th_info.ds.ds_gtid; 509 __kmp_gtid_set_specific(gtid); 510#ifdef KMP_TDATA_GTID 511 __kmp_gtid = gtid; 512#endif 513#if KMP_STATS_ENABLED 514 // set thread local index to point to thread-specific stats 515 __kmp_stats_thread_ptr = ((kmp_info_t *)thr)->th.th_stats; 516 __kmp_stats_thread_ptr->startLife(); 517 KMP_SET_THREAD_STATE(IDLE); 518 KMP_INIT_PARTITIONED_TIMERS(OMP_idle); 519#endif 520 521#if USE_ITT_BUILD 522 __kmp_itt_thread_name(gtid); 523#endif /* USE_ITT_BUILD */ 524 525#if KMP_AFFINITY_SUPPORTED 526 __kmp_affinity_bind_init_mask(gtid); 527#endif 528 529#ifdef KMP_CANCEL_THREADS 530 status = pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &old_type); 531 KMP_CHECK_SYSFAIL("pthread_setcanceltype", status); 532 // josh todo: isn't PTHREAD_CANCEL_ENABLE default for newly-created threads? 533 status = pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_state); 534 KMP_CHECK_SYSFAIL("pthread_setcancelstate", status); 535#endif 536 537#if KMP_ARCH_X86 || KMP_ARCH_X86_64 538 // Set FP control regs to be a copy of the parallel initialization thread's. 539 __kmp_clear_x87_fpu_status_word(); 540 __kmp_load_x87_fpu_control_word(&__kmp_init_x87_fpu_control_word); 541 __kmp_load_mxcsr(&__kmp_init_mxcsr); 542#endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */ 543 544#ifdef KMP_BLOCK_SIGNALS 545 status = sigfillset(&new_set); 546 KMP_CHECK_SYSFAIL_ERRNO("sigfillset", status); 547 status = pthread_sigmask(SIG_BLOCK, &new_set, &old_set); 548 KMP_CHECK_SYSFAIL("pthread_sigmask", status); 549#endif /* KMP_BLOCK_SIGNALS */ 550 551#if KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD || \ 552 KMP_OS_OPENBSD || KMP_OS_HURD || KMP_OS_SOLARIS || KMP_OS_AIX 553 if (__kmp_stkoffset > 0 && gtid > 0) { 554 padding = KMP_ALLOCA(gtid * __kmp_stkoffset); 555 (void)padding; 556 } 557#endif 558 559 KMP_MB(); 560 __kmp_set_stack_info(gtid, (kmp_info_t *)thr); 561 562 __kmp_check_stack_overlap((kmp_info_t *)thr); 563 564 exit_val = __kmp_launch_thread((kmp_info_t *)thr); 565 566#ifdef KMP_BLOCK_SIGNALS 567 status = pthread_sigmask(SIG_SETMASK, &old_set, NULL); 568 KMP_CHECK_SYSFAIL("pthread_sigmask", status); 569#endif /* KMP_BLOCK_SIGNALS */ 570 571 return exit_val; 572} 573 574#if KMP_USE_MONITOR 575/* The monitor thread controls all of the threads in the complex */ 576 577static void *__kmp_launch_monitor(void *thr) { 578 int status, old_type, old_state; 579#ifdef KMP_BLOCK_SIGNALS 580 sigset_t new_set; 581#endif /* KMP_BLOCK_SIGNALS */ 582 struct timespec interval; 583 584 KMP_MB(); /* Flush all pending memory write invalidates. */ 585 586 KA_TRACE(10, ("__kmp_launch_monitor: #1 launched\n")); 587 588 /* register us as the monitor thread */ 589 __kmp_gtid_set_specific(KMP_GTID_MONITOR); 590#ifdef KMP_TDATA_GTID 591 __kmp_gtid = KMP_GTID_MONITOR; 592#endif 593 594 KMP_MB(); 595 596#if USE_ITT_BUILD 597 // Instruct Intel(R) Threading Tools to ignore monitor thread. 598 __kmp_itt_thread_ignore(); 599#endif /* USE_ITT_BUILD */ 600 601 __kmp_set_stack_info(((kmp_info_t *)thr)->th.th_info.ds.ds_gtid, 602 (kmp_info_t *)thr); 603 604 __kmp_check_stack_overlap((kmp_info_t *)thr); 605 606#ifdef KMP_CANCEL_THREADS 607 status = pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &old_type); 608 KMP_CHECK_SYSFAIL("pthread_setcanceltype", status); 609 // josh todo: isn't PTHREAD_CANCEL_ENABLE default for newly-created threads? 610 status = pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_state); 611 KMP_CHECK_SYSFAIL("pthread_setcancelstate", status); 612#endif 613 614#if KMP_REAL_TIME_FIX 615 // This is a potential fix which allows application with real-time scheduling 616 // policy work. However, decision about the fix is not made yet, so it is 617 // disabled by default. 618 { // Are program started with real-time scheduling policy? 619 int sched = sched_getscheduler(0); 620 if (sched == SCHED_FIFO || sched == SCHED_RR) { 621 // Yes, we are a part of real-time application. Try to increase the 622 // priority of the monitor. 623 struct sched_param param; 624 int max_priority = sched_get_priority_max(sched); 625 int rc; 626 KMP_WARNING(RealTimeSchedNotSupported); 627 sched_getparam(0, ¶m); 628 if (param.sched_priority < max_priority) { 629 param.sched_priority += 1; 630 rc = sched_setscheduler(0, sched, ¶m); 631 if (rc != 0) { 632 int error = errno; 633 kmp_msg_t err_code = KMP_ERR(error); 634 __kmp_msg(kmp_ms_warning, KMP_MSG(CantChangeMonitorPriority), 635 err_code, KMP_MSG(MonitorWillStarve), __kmp_msg_null); 636 if (__kmp_generate_warnings == kmp_warnings_off) { 637 __kmp_str_free(&err_code.str); 638 } 639 } 640 } else { 641 // We cannot abort here, because number of CPUs may be enough for all 642 // the threads, including the monitor thread, so application could 643 // potentially work... 644 __kmp_msg(kmp_ms_warning, KMP_MSG(RunningAtMaxPriority), 645 KMP_MSG(MonitorWillStarve), KMP_HNT(RunningAtMaxPriority), 646 __kmp_msg_null); 647 } 648 } 649 // AC: free thread that waits for monitor started 650 TCW_4(__kmp_global.g.g_time.dt.t_value, 0); 651 } 652#endif // KMP_REAL_TIME_FIX 653 654 KMP_MB(); /* Flush all pending memory write invalidates. */ 655 656 if (__kmp_monitor_wakeups == 1) { 657 interval.tv_sec = 1; 658 interval.tv_nsec = 0; 659 } else { 660 interval.tv_sec = 0; 661 interval.tv_nsec = (KMP_NSEC_PER_SEC / __kmp_monitor_wakeups); 662 } 663 664 KA_TRACE(10, ("__kmp_launch_monitor: #2 monitor\n")); 665 666 while (!TCR_4(__kmp_global.g.g_done)) { 667 struct timespec now; 668 struct timeval tval; 669 670 /* This thread monitors the state of the system */ 671 672 KA_TRACE(15, ("__kmp_launch_monitor: update\n")); 673 674 status = gettimeofday(&tval, NULL); 675 KMP_CHECK_SYSFAIL_ERRNO("gettimeofday", status); 676 TIMEVAL_TO_TIMESPEC(&tval, &now); 677 678 now.tv_sec += interval.tv_sec; 679 now.tv_nsec += interval.tv_nsec; 680 681 if (now.tv_nsec >= KMP_NSEC_PER_SEC) { 682 now.tv_sec += 1; 683 now.tv_nsec -= KMP_NSEC_PER_SEC; 684 } 685 686 status = pthread_mutex_lock(&__kmp_wait_mx.m_mutex); 687 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status); 688 // AC: the monitor should not fall asleep if g_done has been set 689 if (!TCR_4(__kmp_global.g.g_done)) { // check once more under mutex 690 status = pthread_cond_timedwait(&__kmp_wait_cv.c_cond, 691 &__kmp_wait_mx.m_mutex, &now); 692 if (status != 0) { 693 if (status != ETIMEDOUT && status != EINTR) { 694 KMP_SYSFAIL("pthread_cond_timedwait", status); 695 } 696 } 697 } 698 status = pthread_mutex_unlock(&__kmp_wait_mx.m_mutex); 699 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status); 700 701 TCW_4(__kmp_global.g.g_time.dt.t_value, 702 TCR_4(__kmp_global.g.g_time.dt.t_value) + 1); 703 704 KMP_MB(); /* Flush all pending memory write invalidates. */ 705 } 706 707 KA_TRACE(10, ("__kmp_launch_monitor: #3 cleanup\n")); 708 709#ifdef KMP_BLOCK_SIGNALS 710 status = sigfillset(&new_set); 711 KMP_CHECK_SYSFAIL_ERRNO("sigfillset", status); 712 status = pthread_sigmask(SIG_UNBLOCK, &new_set, NULL); 713 KMP_CHECK_SYSFAIL("pthread_sigmask", status); 714#endif /* KMP_BLOCK_SIGNALS */ 715 716 KA_TRACE(10, ("__kmp_launch_monitor: #4 finished\n")); 717 718 if (__kmp_global.g.g_abort != 0) { 719 /* now we need to terminate the worker threads */ 720 /* the value of t_abort is the signal we caught */ 721 722 int gtid; 723 724 KA_TRACE(10, ("__kmp_launch_monitor: #5 terminate sig=%d\n", 725 __kmp_global.g.g_abort)); 726 727 /* terminate the OpenMP worker threads */ 728 /* TODO this is not valid for sibling threads!! 729 * the uber master might not be 0 anymore.. */ 730 for (gtid = 1; gtid < __kmp_threads_capacity; ++gtid) 731 __kmp_terminate_thread(gtid); 732 733 __kmp_cleanup(); 734 735 KA_TRACE(10, ("__kmp_launch_monitor: #6 raise sig=%d\n", 736 __kmp_global.g.g_abort)); 737 738 if (__kmp_global.g.g_abort > 0) 739 raise(__kmp_global.g.g_abort); 740 } 741 742 KA_TRACE(10, ("__kmp_launch_monitor: #7 exit\n")); 743 744 return thr; 745} 746#endif // KMP_USE_MONITOR 747 748void __kmp_create_worker(int gtid, kmp_info_t *th, size_t stack_size) { 749 pthread_t handle; 750 pthread_attr_t thread_attr; 751 int status; 752 753 th->th.th_info.ds.ds_gtid = gtid; 754 755#if KMP_STATS_ENABLED 756 // sets up worker thread stats 757 __kmp_acquire_tas_lock(&__kmp_stats_lock, gtid); 758 759 // th->th.th_stats is used to transfer thread-specific stats-pointer to 760 // __kmp_launch_worker. So when thread is created (goes into 761 // __kmp_launch_worker) it will set its thread local pointer to 762 // th->th.th_stats 763 if (!KMP_UBER_GTID(gtid)) { 764 th->th.th_stats = __kmp_stats_list->push_back(gtid); 765 } else { 766 // For root threads, __kmp_stats_thread_ptr is set in __kmp_register_root(), 767 // so set the th->th.th_stats field to it. 768 th->th.th_stats = __kmp_stats_thread_ptr; 769 } 770 __kmp_release_tas_lock(&__kmp_stats_lock, gtid); 771 772#endif // KMP_STATS_ENABLED 773 774 if (KMP_UBER_GTID(gtid)) { 775 KA_TRACE(10, ("__kmp_create_worker: uber thread (%d)\n", gtid)); 776 th->th.th_info.ds.ds_thread = pthread_self(); 777 __kmp_set_stack_info(gtid, th); 778 __kmp_check_stack_overlap(th); 779 return; 780 } 781 782 KA_TRACE(10, ("__kmp_create_worker: try to create thread (%d)\n", gtid)); 783 784 KMP_MB(); /* Flush all pending memory write invalidates. */ 785 786#ifdef KMP_THREAD_ATTR 787 status = pthread_attr_init(&thread_attr); 788 if (status != 0) { 789 __kmp_fatal(KMP_MSG(CantInitThreadAttrs), KMP_ERR(status), __kmp_msg_null); 790 } 791 status = pthread_attr_setdetachstate(&thread_attr, PTHREAD_CREATE_JOINABLE); 792 if (status != 0) { 793 __kmp_fatal(KMP_MSG(CantSetWorkerState), KMP_ERR(status), __kmp_msg_null); 794 } 795 796 /* Set stack size for this thread now. 797 The multiple of 2 is there because on some machines, requesting an unusual 798 stacksize causes the thread to have an offset before the dummy alloca() 799 takes place to create the offset. Since we want the user to have a 800 sufficient stacksize AND support a stack offset, we alloca() twice the 801 offset so that the upcoming alloca() does not eliminate any premade offset, 802 and also gives the user the stack space they requested for all threads */ 803 stack_size += gtid * __kmp_stkoffset * 2; 804 805 KA_TRACE(10, ("__kmp_create_worker: T#%d, default stacksize = %lu bytes, " 806 "__kmp_stksize = %lu bytes, final stacksize = %lu bytes\n", 807 gtid, KMP_DEFAULT_STKSIZE, __kmp_stksize, stack_size)); 808 809#ifdef _POSIX_THREAD_ATTR_STACKSIZE 810 status = pthread_attr_setstacksize(&thread_attr, stack_size); 811#ifdef KMP_BACKUP_STKSIZE 812 if (status != 0) { 813 if (!__kmp_env_stksize) { 814 stack_size = KMP_BACKUP_STKSIZE + gtid * __kmp_stkoffset; 815 __kmp_stksize = KMP_BACKUP_STKSIZE; 816 KA_TRACE(10, ("__kmp_create_worker: T#%d, default stacksize = %lu bytes, " 817 "__kmp_stksize = %lu bytes, (backup) final stacksize = %lu " 818 "bytes\n", 819 gtid, KMP_DEFAULT_STKSIZE, __kmp_stksize, stack_size)); 820 status = pthread_attr_setstacksize(&thread_attr, stack_size); 821 } 822 } 823#endif /* KMP_BACKUP_STKSIZE */ 824 if (status != 0) { 825 __kmp_fatal(KMP_MSG(CantSetWorkerStackSize, stack_size), KMP_ERR(status), 826 KMP_HNT(ChangeWorkerStackSize), __kmp_msg_null); 827 } 828#endif /* _POSIX_THREAD_ATTR_STACKSIZE */ 829 830#endif /* KMP_THREAD_ATTR */ 831 832 status = 833 pthread_create(&handle, &thread_attr, __kmp_launch_worker, (void *)th); 834 if (status != 0 || !handle) { // ??? Why do we check handle?? 835#ifdef _POSIX_THREAD_ATTR_STACKSIZE 836 if (status == EINVAL) { 837 __kmp_fatal(KMP_MSG(CantSetWorkerStackSize, stack_size), KMP_ERR(status), 838 KMP_HNT(IncreaseWorkerStackSize), __kmp_msg_null); 839 } 840 if (status == ENOMEM) { 841 __kmp_fatal(KMP_MSG(CantSetWorkerStackSize, stack_size), KMP_ERR(status), 842 KMP_HNT(DecreaseWorkerStackSize), __kmp_msg_null); 843 } 844#endif /* _POSIX_THREAD_ATTR_STACKSIZE */ 845 if (status == EAGAIN) { 846 __kmp_fatal(KMP_MSG(NoResourcesForWorkerThread), KMP_ERR(status), 847 KMP_HNT(Decrease_NUM_THREADS), __kmp_msg_null); 848 } 849 KMP_SYSFAIL("pthread_create", status); 850 } 851 852 th->th.th_info.ds.ds_thread = handle; 853 854#ifdef KMP_THREAD_ATTR 855 status = pthread_attr_destroy(&thread_attr); 856 if (status) { 857 kmp_msg_t err_code = KMP_ERR(status); 858 __kmp_msg(kmp_ms_warning, KMP_MSG(CantDestroyThreadAttrs), err_code, 859 __kmp_msg_null); 860 if (__kmp_generate_warnings == kmp_warnings_off) { 861 __kmp_str_free(&err_code.str); 862 } 863 } 864#endif /* KMP_THREAD_ATTR */ 865 866 KMP_MB(); /* Flush all pending memory write invalidates. */ 867 868 KA_TRACE(10, ("__kmp_create_worker: done creating thread (%d)\n", gtid)); 869 870} // __kmp_create_worker 871 872#if KMP_USE_MONITOR 873void __kmp_create_monitor(kmp_info_t *th) { 874 pthread_t handle; 875 pthread_attr_t thread_attr; 876 size_t size; 877 int status; 878 int auto_adj_size = FALSE; 879 880 if (__kmp_dflt_blocktime == KMP_MAX_BLOCKTIME) { 881 // We don't need monitor thread in case of MAX_BLOCKTIME 882 KA_TRACE(10, ("__kmp_create_monitor: skipping monitor thread because of " 883 "MAX blocktime\n")); 884 th->th.th_info.ds.ds_tid = 0; // this makes reap_monitor no-op 885 th->th.th_info.ds.ds_gtid = 0; 886 return; 887 } 888 KA_TRACE(10, ("__kmp_create_monitor: try to create monitor\n")); 889 890 KMP_MB(); /* Flush all pending memory write invalidates. */ 891 892 th->th.th_info.ds.ds_tid = KMP_GTID_MONITOR; 893 th->th.th_info.ds.ds_gtid = KMP_GTID_MONITOR; 894#if KMP_REAL_TIME_FIX 895 TCW_4(__kmp_global.g.g_time.dt.t_value, 896 -1); // Will use it for synchronization a bit later. 897#else 898 TCW_4(__kmp_global.g.g_time.dt.t_value, 0); 899#endif // KMP_REAL_TIME_FIX 900 901#ifdef KMP_THREAD_ATTR 902 if (__kmp_monitor_stksize == 0) { 903 __kmp_monitor_stksize = KMP_DEFAULT_MONITOR_STKSIZE; 904 auto_adj_size = TRUE; 905 } 906 status = pthread_attr_init(&thread_attr); 907 if (status != 0) { 908 __kmp_fatal(KMP_MSG(CantInitThreadAttrs), KMP_ERR(status), __kmp_msg_null); 909 } 910 status = pthread_attr_setdetachstate(&thread_attr, PTHREAD_CREATE_JOINABLE); 911 if (status != 0) { 912 __kmp_fatal(KMP_MSG(CantSetMonitorState), KMP_ERR(status), __kmp_msg_null); 913 } 914 915#ifdef _POSIX_THREAD_ATTR_STACKSIZE 916 status = pthread_attr_getstacksize(&thread_attr, &size); 917 KMP_CHECK_SYSFAIL("pthread_attr_getstacksize", status); 918#else 919 size = __kmp_sys_min_stksize; 920#endif /* _POSIX_THREAD_ATTR_STACKSIZE */ 921#endif /* KMP_THREAD_ATTR */ 922 923 if (__kmp_monitor_stksize == 0) { 924 __kmp_monitor_stksize = KMP_DEFAULT_MONITOR_STKSIZE; 925 } 926 if (__kmp_monitor_stksize < __kmp_sys_min_stksize) { 927 __kmp_monitor_stksize = __kmp_sys_min_stksize; 928 } 929 930 KA_TRACE(10, ("__kmp_create_monitor: default stacksize = %lu bytes," 931 "requested stacksize = %lu bytes\n", 932 size, __kmp_monitor_stksize)); 933 934retry: 935 936/* Set stack size for this thread now. */ 937#ifdef _POSIX_THREAD_ATTR_STACKSIZE 938 KA_TRACE(10, ("__kmp_create_monitor: setting stacksize = %lu bytes,", 939 __kmp_monitor_stksize)); 940 status = pthread_attr_setstacksize(&thread_attr, __kmp_monitor_stksize); 941 if (status != 0) { 942 if (auto_adj_size) { 943 __kmp_monitor_stksize *= 2; 944 goto retry; 945 } 946 kmp_msg_t err_code = KMP_ERR(status); 947 __kmp_msg(kmp_ms_warning, // should this be fatal? BB 948 KMP_MSG(CantSetMonitorStackSize, (long int)__kmp_monitor_stksize), 949 err_code, KMP_HNT(ChangeMonitorStackSize), __kmp_msg_null); 950 if (__kmp_generate_warnings == kmp_warnings_off) { 951 __kmp_str_free(&err_code.str); 952 } 953 } 954#endif /* _POSIX_THREAD_ATTR_STACKSIZE */ 955 956 status = 957 pthread_create(&handle, &thread_attr, __kmp_launch_monitor, (void *)th); 958 959 if (status != 0) { 960#ifdef _POSIX_THREAD_ATTR_STACKSIZE 961 if (status == EINVAL) { 962 if (auto_adj_size && (__kmp_monitor_stksize < (size_t)0x40000000)) { 963 __kmp_monitor_stksize *= 2; 964 goto retry; 965 } 966 __kmp_fatal(KMP_MSG(CantSetMonitorStackSize, __kmp_monitor_stksize), 967 KMP_ERR(status), KMP_HNT(IncreaseMonitorStackSize), 968 __kmp_msg_null); 969 } 970 if (status == ENOMEM) { 971 __kmp_fatal(KMP_MSG(CantSetMonitorStackSize, __kmp_monitor_stksize), 972 KMP_ERR(status), KMP_HNT(DecreaseMonitorStackSize), 973 __kmp_msg_null); 974 } 975#endif /* _POSIX_THREAD_ATTR_STACKSIZE */ 976 if (status == EAGAIN) { 977 __kmp_fatal(KMP_MSG(NoResourcesForMonitorThread), KMP_ERR(status), 978 KMP_HNT(DecreaseNumberOfThreadsInUse), __kmp_msg_null); 979 } 980 KMP_SYSFAIL("pthread_create", status); 981 } 982 983 th->th.th_info.ds.ds_thread = handle; 984 985#if KMP_REAL_TIME_FIX 986 // Wait for the monitor thread is really started and set its *priority*. 987 KMP_DEBUG_ASSERT(sizeof(kmp_uint32) == 988 sizeof(__kmp_global.g.g_time.dt.t_value)); 989 __kmp_wait_4((kmp_uint32 volatile *)&__kmp_global.g.g_time.dt.t_value, -1, 990 &__kmp_neq_4, NULL); 991#endif // KMP_REAL_TIME_FIX 992 993#ifdef KMP_THREAD_ATTR 994 status = pthread_attr_destroy(&thread_attr); 995 if (status != 0) { 996 kmp_msg_t err_code = KMP_ERR(status); 997 __kmp_msg(kmp_ms_warning, KMP_MSG(CantDestroyThreadAttrs), err_code, 998 __kmp_msg_null); 999 if (__kmp_generate_warnings == kmp_warnings_off) { 1000 __kmp_str_free(&err_code.str); 1001 } 1002 } 1003#endif 1004 1005 KMP_MB(); /* Flush all pending memory write invalidates. */ 1006 1007 KA_TRACE(10, ("__kmp_create_monitor: monitor created %#.8lx\n", 1008 th->th.th_info.ds.ds_thread)); 1009 1010} // __kmp_create_monitor 1011#endif // KMP_USE_MONITOR 1012 1013void __kmp_exit_thread(int exit_status) { 1014#if KMP_OS_WASI 1015// TODO: the wasm32-wasi-threads target does not yet support pthread_exit. 1016#else 1017 pthread_exit((void *)(intptr_t)exit_status); 1018#endif 1019} // __kmp_exit_thread 1020 1021#if KMP_USE_MONITOR 1022void __kmp_resume_monitor(); 1023 1024extern "C" void __kmp_reap_monitor(kmp_info_t *th) { 1025 int status; 1026 void *exit_val; 1027 1028 KA_TRACE(10, ("__kmp_reap_monitor: try to reap monitor thread with handle" 1029 " %#.8lx\n", 1030 th->th.th_info.ds.ds_thread)); 1031 1032 // If monitor has been created, its tid and gtid should be KMP_GTID_MONITOR. 1033 // If both tid and gtid are 0, it means the monitor did not ever start. 1034 // If both tid and gtid are KMP_GTID_DNE, the monitor has been shut down. 1035 KMP_DEBUG_ASSERT(th->th.th_info.ds.ds_tid == th->th.th_info.ds.ds_gtid); 1036 if (th->th.th_info.ds.ds_gtid != KMP_GTID_MONITOR) { 1037 KA_TRACE(10, ("__kmp_reap_monitor: monitor did not start, returning\n")); 1038 return; 1039 } 1040 1041 KMP_MB(); /* Flush all pending memory write invalidates. */ 1042 1043 /* First, check to see whether the monitor thread exists to wake it up. This 1044 is to avoid performance problem when the monitor sleeps during 1045 blocktime-size interval */ 1046 1047 status = pthread_kill(th->th.th_info.ds.ds_thread, 0); 1048 if (status != ESRCH) { 1049 __kmp_resume_monitor(); // Wake up the monitor thread 1050 } 1051 KA_TRACE(10, ("__kmp_reap_monitor: try to join with monitor\n")); 1052 status = pthread_join(th->th.th_info.ds.ds_thread, &exit_val); 1053 if (exit_val != th) { 1054 __kmp_fatal(KMP_MSG(ReapMonitorError), KMP_ERR(status), __kmp_msg_null); 1055 } 1056 1057 th->th.th_info.ds.ds_tid = KMP_GTID_DNE; 1058 th->th.th_info.ds.ds_gtid = KMP_GTID_DNE; 1059 1060 KA_TRACE(10, ("__kmp_reap_monitor: done reaping monitor thread with handle" 1061 " %#.8lx\n", 1062 th->th.th_info.ds.ds_thread)); 1063 1064 KMP_MB(); /* Flush all pending memory write invalidates. */ 1065} 1066#else 1067// Empty symbol to export (see exports_so.txt) when 1068// monitor thread feature is disabled 1069extern "C" void __kmp_reap_monitor(kmp_info_t *th) { 1070 (void)th; 1071} 1072#endif // KMP_USE_MONITOR 1073 1074void __kmp_reap_worker(kmp_info_t *th) { 1075 int status; 1076 void *exit_val; 1077 1078 KMP_MB(); /* Flush all pending memory write invalidates. */ 1079 1080 KA_TRACE( 1081 10, ("__kmp_reap_worker: try to reap T#%d\n", th->th.th_info.ds.ds_gtid)); 1082 1083 status = pthread_join(th->th.th_info.ds.ds_thread, &exit_val); 1084#ifdef KMP_DEBUG 1085 /* Don't expose these to the user until we understand when they trigger */ 1086 if (status != 0) { 1087 __kmp_fatal(KMP_MSG(ReapWorkerError), KMP_ERR(status), __kmp_msg_null); 1088 } 1089 if (exit_val != th) { 1090 KA_TRACE(10, ("__kmp_reap_worker: worker T#%d did not reap properly, " 1091 "exit_val = %p\n", 1092 th->th.th_info.ds.ds_gtid, exit_val)); 1093 } 1094#else 1095 (void)status; // unused variable 1096#endif /* KMP_DEBUG */ 1097 1098 KA_TRACE(10, ("__kmp_reap_worker: done reaping T#%d\n", 1099 th->th.th_info.ds.ds_gtid)); 1100 1101 KMP_MB(); /* Flush all pending memory write invalidates. */ 1102} 1103 1104#if KMP_HANDLE_SIGNALS 1105 1106static void __kmp_null_handler(int signo) { 1107 // Do nothing, for doing SIG_IGN-type actions. 1108} // __kmp_null_handler 1109 1110static void __kmp_team_handler(int signo) { 1111 if (__kmp_global.g.g_abort == 0) { 1112/* Stage 1 signal handler, let's shut down all of the threads */ 1113#ifdef KMP_DEBUG 1114 __kmp_debug_printf("__kmp_team_handler: caught signal = %d\n", signo); 1115#endif 1116 switch (signo) { 1117 case SIGHUP: 1118 case SIGINT: 1119 case SIGQUIT: 1120 case SIGILL: 1121 case SIGABRT: 1122 case SIGFPE: 1123 case SIGBUS: 1124 case SIGSEGV: 1125#ifdef SIGSYS 1126 case SIGSYS: 1127#endif 1128 case SIGTERM: 1129 if (__kmp_debug_buf) { 1130 __kmp_dump_debug_buffer(); 1131 } 1132 __kmp_unregister_library(); // cleanup shared memory 1133 KMP_MB(); // Flush all pending memory write invalidates. 1134 TCW_4(__kmp_global.g.g_abort, signo); 1135 KMP_MB(); // Flush all pending memory write invalidates. 1136 TCW_4(__kmp_global.g.g_done, TRUE); 1137 KMP_MB(); // Flush all pending memory write invalidates. 1138 break; 1139 default: 1140#ifdef KMP_DEBUG 1141 __kmp_debug_printf("__kmp_team_handler: unknown signal type"); 1142#endif 1143 break; 1144 } 1145 } 1146} // __kmp_team_handler 1147 1148static void __kmp_sigaction(int signum, const struct sigaction *act, 1149 struct sigaction *oldact) { 1150 int rc = sigaction(signum, act, oldact); 1151 KMP_CHECK_SYSFAIL_ERRNO("sigaction", rc); 1152} 1153 1154static void __kmp_install_one_handler(int sig, sig_func_t handler_func, 1155 int parallel_init) { 1156 KMP_MB(); // Flush all pending memory write invalidates. 1157 KB_TRACE(60, 1158 ("__kmp_install_one_handler( %d, ..., %d )\n", sig, parallel_init)); 1159 if (parallel_init) { 1160 struct sigaction new_action; 1161 struct sigaction old_action; 1162 new_action.sa_handler = handler_func; 1163 new_action.sa_flags = 0; 1164 sigfillset(&new_action.sa_mask); 1165 __kmp_sigaction(sig, &new_action, &old_action); 1166 if (old_action.sa_handler == __kmp_sighldrs[sig].sa_handler) { 1167 sigaddset(&__kmp_sigset, sig); 1168 } else { 1169 // Restore/keep user's handler if one previously installed. 1170 __kmp_sigaction(sig, &old_action, NULL); 1171 } 1172 } else { 1173 // Save initial/system signal handlers to see if user handlers installed. 1174 __kmp_sigaction(sig, NULL, &__kmp_sighldrs[sig]); 1175 } 1176 KMP_MB(); // Flush all pending memory write invalidates. 1177} // __kmp_install_one_handler 1178 1179static void __kmp_remove_one_handler(int sig) { 1180 KB_TRACE(60, ("__kmp_remove_one_handler( %d )\n", sig)); 1181 if (sigismember(&__kmp_sigset, sig)) { 1182 struct sigaction old; 1183 KMP_MB(); // Flush all pending memory write invalidates. 1184 __kmp_sigaction(sig, &__kmp_sighldrs[sig], &old); 1185 if ((old.sa_handler != __kmp_team_handler) && 1186 (old.sa_handler != __kmp_null_handler)) { 1187 // Restore the users signal handler. 1188 KB_TRACE(10, ("__kmp_remove_one_handler: oops, not our handler, " 1189 "restoring: sig=%d\n", 1190 sig)); 1191 __kmp_sigaction(sig, &old, NULL); 1192 } 1193 sigdelset(&__kmp_sigset, sig); 1194 KMP_MB(); // Flush all pending memory write invalidates. 1195 } 1196} // __kmp_remove_one_handler 1197 1198void __kmp_install_signals(int parallel_init) { 1199 KB_TRACE(10, ("__kmp_install_signals( %d )\n", parallel_init)); 1200 if (__kmp_handle_signals || !parallel_init) { 1201 // If ! parallel_init, we do not install handlers, just save original 1202 // handlers. Let us do it even __handle_signals is 0. 1203 sigemptyset(&__kmp_sigset); 1204 __kmp_install_one_handler(SIGHUP, __kmp_team_handler, parallel_init); 1205 __kmp_install_one_handler(SIGINT, __kmp_team_handler, parallel_init); 1206 __kmp_install_one_handler(SIGQUIT, __kmp_team_handler, parallel_init); 1207 __kmp_install_one_handler(SIGILL, __kmp_team_handler, parallel_init); 1208 __kmp_install_one_handler(SIGABRT, __kmp_team_handler, parallel_init); 1209 __kmp_install_one_handler(SIGFPE, __kmp_team_handler, parallel_init); 1210 __kmp_install_one_handler(SIGBUS, __kmp_team_handler, parallel_init); 1211 __kmp_install_one_handler(SIGSEGV, __kmp_team_handler, parallel_init); 1212#ifdef SIGSYS 1213 __kmp_install_one_handler(SIGSYS, __kmp_team_handler, parallel_init); 1214#endif // SIGSYS 1215 __kmp_install_one_handler(SIGTERM, __kmp_team_handler, parallel_init); 1216#ifdef SIGPIPE 1217 __kmp_install_one_handler(SIGPIPE, __kmp_team_handler, parallel_init); 1218#endif // SIGPIPE 1219 } 1220} // __kmp_install_signals 1221 1222void __kmp_remove_signals(void) { 1223 int sig; 1224 KB_TRACE(10, ("__kmp_remove_signals()\n")); 1225 for (sig = 1; sig < NSIG; ++sig) { 1226 __kmp_remove_one_handler(sig); 1227 } 1228} // __kmp_remove_signals 1229 1230#endif // KMP_HANDLE_SIGNALS 1231 1232void __kmp_enable(int new_state) { 1233#ifdef KMP_CANCEL_THREADS 1234 int status, old_state; 1235 status = pthread_setcancelstate(new_state, &old_state); 1236 KMP_CHECK_SYSFAIL("pthread_setcancelstate", status); 1237 KMP_DEBUG_ASSERT(old_state == PTHREAD_CANCEL_DISABLE); 1238#endif 1239} 1240 1241void __kmp_disable(int *old_state) { 1242#ifdef KMP_CANCEL_THREADS 1243 int status; 1244 status = pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, old_state); 1245 KMP_CHECK_SYSFAIL("pthread_setcancelstate", status); 1246#endif 1247} 1248 1249static void __kmp_atfork_prepare(void) { 1250 __kmp_acquire_bootstrap_lock(&__kmp_initz_lock); 1251 __kmp_acquire_bootstrap_lock(&__kmp_forkjoin_lock); 1252} 1253 1254static void __kmp_atfork_parent(void) { 1255 __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock); 1256 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 1257} 1258 1259/* Reset the library so execution in the child starts "all over again" with 1260 clean data structures in initial states. Don't worry about freeing memory 1261 allocated by parent, just abandon it to be safe. */ 1262static void __kmp_atfork_child(void) { 1263 __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock); 1264 __kmp_release_bootstrap_lock(&__kmp_initz_lock); 1265 /* TODO make sure this is done right for nested/sibling */ 1266 // ATT: Memory leaks are here? TODO: Check it and fix. 1267 /* KMP_ASSERT( 0 ); */ 1268 1269 ++__kmp_fork_count; 1270 1271#if KMP_AFFINITY_SUPPORTED 1272#if KMP_OS_LINUX || KMP_OS_FREEBSD || KMP_OS_AIX 1273 // reset the affinity in the child to the initial thread 1274 // affinity in the parent 1275 kmp_set_thread_affinity_mask_initial(); 1276#endif 1277 // Set default not to bind threads tightly in the child (we're expecting 1278 // over-subscription after the fork and this can improve things for 1279 // scripting languages that use OpenMP inside process-parallel code). 1280 if (__kmp_nested_proc_bind.bind_types != NULL) { 1281 __kmp_nested_proc_bind.bind_types[0] = proc_bind_false; 1282 } 1283 for (kmp_affinity_t *affinity : __kmp_affinities) 1284 *affinity = KMP_AFFINITY_INIT(affinity->env_var); 1285 __kmp_affin_fullMask = nullptr; 1286 __kmp_affin_origMask = nullptr; 1287 __kmp_topology = nullptr; 1288#endif // KMP_AFFINITY_SUPPORTED 1289 1290#if KMP_USE_MONITOR 1291 __kmp_init_monitor = 0; 1292#endif 1293 __kmp_init_parallel = FALSE; 1294 __kmp_init_middle = FALSE; 1295 __kmp_init_serial = FALSE; 1296 TCW_4(__kmp_init_gtid, FALSE); 1297 __kmp_init_common = FALSE; 1298 1299 TCW_4(__kmp_init_user_locks, FALSE); 1300#if !KMP_USE_DYNAMIC_LOCK 1301 __kmp_user_lock_table.used = 1; 1302 __kmp_user_lock_table.allocated = 0; 1303 __kmp_user_lock_table.table = NULL; 1304 __kmp_lock_blocks = NULL; 1305#endif 1306 1307 __kmp_all_nth = 0; 1308 TCW_4(__kmp_nth, 0); 1309 1310 __kmp_thread_pool = NULL; 1311 __kmp_thread_pool_insert_pt = NULL; 1312 __kmp_team_pool = NULL; 1313 1314 /* Must actually zero all the *cache arguments passed to __kmpc_threadprivate 1315 here so threadprivate doesn't use stale data */ 1316 KA_TRACE(10, ("__kmp_atfork_child: checking cache address list %p\n", 1317 __kmp_threadpriv_cache_list)); 1318 1319 while (__kmp_threadpriv_cache_list != NULL) { 1320 1321 if (*__kmp_threadpriv_cache_list->addr != NULL) { 1322 KC_TRACE(50, ("__kmp_atfork_child: zeroing cache at address %p\n", 1323 &(*__kmp_threadpriv_cache_list->addr))); 1324 1325 *__kmp_threadpriv_cache_list->addr = NULL; 1326 } 1327 __kmp_threadpriv_cache_list = __kmp_threadpriv_cache_list->next; 1328 } 1329 1330 __kmp_init_runtime = FALSE; 1331 1332 /* reset statically initialized locks */ 1333 __kmp_init_bootstrap_lock(&__kmp_initz_lock); 1334 __kmp_init_bootstrap_lock(&__kmp_stdio_lock); 1335 __kmp_init_bootstrap_lock(&__kmp_console_lock); 1336 __kmp_init_bootstrap_lock(&__kmp_task_team_lock); 1337 1338#if USE_ITT_BUILD 1339 __kmp_itt_reset(); // reset ITT's global state 1340#endif /* USE_ITT_BUILD */ 1341 1342 { 1343 // Child process often get terminated without any use of OpenMP. That might 1344 // cause mapped shared memory file to be left unattended. Thus we postpone 1345 // library registration till middle initialization in the child process. 1346 __kmp_need_register_serial = FALSE; 1347 __kmp_serial_initialize(); 1348 } 1349 1350 /* This is necessary to make sure no stale data is left around */ 1351 /* AC: customers complain that we use unsafe routines in the atfork 1352 handler. Mathworks: dlsym() is unsafe. We call dlsym and dlopen 1353 in dynamic_link when check the presence of shared tbbmalloc library. 1354 Suggestion is to make the library initialization lazier, similar 1355 to what done for __kmpc_begin(). */ 1356 // TODO: synchronize all static initializations with regular library 1357 // startup; look at kmp_global.cpp and etc. 1358 //__kmp_internal_begin (); 1359} 1360 1361void __kmp_register_atfork(void) { 1362 if (__kmp_need_register_atfork) { 1363#if !KMP_OS_WASI 1364 int status = pthread_atfork(__kmp_atfork_prepare, __kmp_atfork_parent, 1365 __kmp_atfork_child); 1366 KMP_CHECK_SYSFAIL("pthread_atfork", status); 1367#endif 1368 __kmp_need_register_atfork = FALSE; 1369 } 1370} 1371 1372void __kmp_suspend_initialize(void) { 1373 int status; 1374 status = pthread_mutexattr_init(&__kmp_suspend_mutex_attr); 1375 KMP_CHECK_SYSFAIL("pthread_mutexattr_init", status); 1376 status = pthread_condattr_init(&__kmp_suspend_cond_attr); 1377 KMP_CHECK_SYSFAIL("pthread_condattr_init", status); 1378} 1379 1380void __kmp_suspend_initialize_thread(kmp_info_t *th) { 1381 int old_value = KMP_ATOMIC_LD_RLX(&th->th.th_suspend_init_count); 1382 int new_value = __kmp_fork_count + 1; 1383 // Return if already initialized 1384 if (old_value == new_value) 1385 return; 1386 // Wait, then return if being initialized 1387 if (old_value == -1 || !__kmp_atomic_compare_store( 1388 &th->th.th_suspend_init_count, old_value, -1)) { 1389 while (KMP_ATOMIC_LD_ACQ(&th->th.th_suspend_init_count) != new_value) { 1390 KMP_CPU_PAUSE(); 1391 } 1392 } else { 1393 // Claim to be the initializer and do initializations 1394 int status; 1395 status = pthread_cond_init(&th->th.th_suspend_cv.c_cond, 1396 &__kmp_suspend_cond_attr); 1397 KMP_CHECK_SYSFAIL("pthread_cond_init", status); 1398 status = pthread_mutex_init(&th->th.th_suspend_mx.m_mutex, 1399 &__kmp_suspend_mutex_attr); 1400 KMP_CHECK_SYSFAIL("pthread_mutex_init", status); 1401 KMP_ATOMIC_ST_REL(&th->th.th_suspend_init_count, new_value); 1402 } 1403} 1404 1405void __kmp_suspend_uninitialize_thread(kmp_info_t *th) { 1406 if (KMP_ATOMIC_LD_ACQ(&th->th.th_suspend_init_count) > __kmp_fork_count) { 1407 /* this means we have initialize the suspension pthread objects for this 1408 thread in this instance of the process */ 1409 int status; 1410 1411 status = pthread_cond_destroy(&th->th.th_suspend_cv.c_cond); 1412 if (status != 0 && status != EBUSY) { 1413 KMP_SYSFAIL("pthread_cond_destroy", status); 1414 } 1415 status = pthread_mutex_destroy(&th->th.th_suspend_mx.m_mutex); 1416 if (status != 0 && status != EBUSY) { 1417 KMP_SYSFAIL("pthread_mutex_destroy", status); 1418 } 1419 --th->th.th_suspend_init_count; 1420 KMP_DEBUG_ASSERT(KMP_ATOMIC_LD_RLX(&th->th.th_suspend_init_count) == 1421 __kmp_fork_count); 1422 } 1423} 1424 1425// return true if lock obtained, false otherwise 1426int __kmp_try_suspend_mx(kmp_info_t *th) { 1427 return (pthread_mutex_trylock(&th->th.th_suspend_mx.m_mutex) == 0); 1428} 1429 1430void __kmp_lock_suspend_mx(kmp_info_t *th) { 1431 int status = pthread_mutex_lock(&th->th.th_suspend_mx.m_mutex); 1432 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status); 1433} 1434 1435void __kmp_unlock_suspend_mx(kmp_info_t *th) { 1436 int status = pthread_mutex_unlock(&th->th.th_suspend_mx.m_mutex); 1437 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status); 1438} 1439 1440/* This routine puts the calling thread to sleep after setting the 1441 sleep bit for the indicated flag variable to true. */ 1442template <class C> 1443static inline void __kmp_suspend_template(int th_gtid, C *flag) { 1444 KMP_TIME_DEVELOPER_PARTITIONED_BLOCK(USER_suspend); 1445 kmp_info_t *th = __kmp_threads[th_gtid]; 1446 int status; 1447 typename C::flag_t old_spin; 1448 1449 KF_TRACE(30, ("__kmp_suspend_template: T#%d enter for flag = %p\n", th_gtid, 1450 flag->get())); 1451 1452 __kmp_suspend_initialize_thread(th); 1453 1454 __kmp_lock_suspend_mx(th); 1455 1456 KF_TRACE(10, ("__kmp_suspend_template: T#%d setting sleep bit for spin(%p)\n", 1457 th_gtid, flag->get())); 1458 1459 /* TODO: shouldn't this use release semantics to ensure that 1460 __kmp_suspend_initialize_thread gets called first? */ 1461 old_spin = flag->set_sleeping(); 1462 TCW_PTR(th->th.th_sleep_loc, (void *)flag); 1463 th->th.th_sleep_loc_type = flag->get_type(); 1464 if (__kmp_dflt_blocktime == KMP_MAX_BLOCKTIME && 1465 __kmp_pause_status != kmp_soft_paused) { 1466 flag->unset_sleeping(); 1467 TCW_PTR(th->th.th_sleep_loc, NULL); 1468 th->th.th_sleep_loc_type = flag_unset; 1469 __kmp_unlock_suspend_mx(th); 1470 return; 1471 } 1472 KF_TRACE(5, ("__kmp_suspend_template: T#%d set sleep bit for spin(%p)==%x," 1473 " was %x\n", 1474 th_gtid, flag->get(), flag->load(), old_spin)); 1475 1476 if (flag->done_check_val(old_spin) || flag->done_check()) { 1477 flag->unset_sleeping(); 1478 TCW_PTR(th->th.th_sleep_loc, NULL); 1479 th->th.th_sleep_loc_type = flag_unset; 1480 KF_TRACE(5, ("__kmp_suspend_template: T#%d false alarm, reset sleep bit " 1481 "for spin(%p)\n", 1482 th_gtid, flag->get())); 1483 } else { 1484 /* Encapsulate in a loop as the documentation states that this may 1485 "with low probability" return when the condition variable has 1486 not been signaled or broadcast */ 1487 int deactivated = FALSE; 1488 1489 while (flag->is_sleeping()) { 1490#ifdef DEBUG_SUSPEND 1491 char buffer[128]; 1492 __kmp_suspend_count++; 1493 __kmp_print_cond(buffer, &th->th.th_suspend_cv); 1494 __kmp_printf("__kmp_suspend_template: suspending T#%d: %s\n", th_gtid, 1495 buffer); 1496#endif 1497 // Mark the thread as no longer active (only in the first iteration of the 1498 // loop). 1499 if (!deactivated) { 1500 th->th.th_active = FALSE; 1501 if (th->th.th_active_in_pool) { 1502 th->th.th_active_in_pool = FALSE; 1503 KMP_ATOMIC_DEC(&__kmp_thread_pool_active_nth); 1504 KMP_DEBUG_ASSERT(TCR_4(__kmp_thread_pool_active_nth) >= 0); 1505 } 1506 deactivated = TRUE; 1507 } 1508 1509 KMP_DEBUG_ASSERT(th->th.th_sleep_loc); 1510 KMP_DEBUG_ASSERT(flag->get_type() == th->th.th_sleep_loc_type); 1511 1512#if USE_SUSPEND_TIMEOUT 1513 struct timespec now; 1514 struct timeval tval; 1515 int msecs; 1516 1517 status = gettimeofday(&tval, NULL); 1518 KMP_CHECK_SYSFAIL_ERRNO("gettimeofday", status); 1519 TIMEVAL_TO_TIMESPEC(&tval, &now); 1520 1521 msecs = (4 * __kmp_dflt_blocktime) + 200; 1522 now.tv_sec += msecs / 1000; 1523 now.tv_nsec += (msecs % 1000) * 1000; 1524 1525 KF_TRACE(15, ("__kmp_suspend_template: T#%d about to perform " 1526 "pthread_cond_timedwait\n", 1527 th_gtid)); 1528 status = pthread_cond_timedwait(&th->th.th_suspend_cv.c_cond, 1529 &th->th.th_suspend_mx.m_mutex, &now); 1530#else 1531 KF_TRACE(15, ("__kmp_suspend_template: T#%d about to perform" 1532 " pthread_cond_wait\n", 1533 th_gtid)); 1534 status = pthread_cond_wait(&th->th.th_suspend_cv.c_cond, 1535 &th->th.th_suspend_mx.m_mutex); 1536#endif // USE_SUSPEND_TIMEOUT 1537 1538 if ((status != 0) && (status != EINTR) && (status != ETIMEDOUT)) { 1539 KMP_SYSFAIL("pthread_cond_wait", status); 1540 } 1541 1542 KMP_DEBUG_ASSERT(flag->get_type() == flag->get_ptr_type()); 1543 1544 if (!flag->is_sleeping() && 1545 ((status == EINTR) || (status == ETIMEDOUT))) { 1546 // if interrupt or timeout, and thread is no longer sleeping, we need to 1547 // make sure sleep_loc gets reset; however, this shouldn't be needed if 1548 // we woke up with resume 1549 flag->unset_sleeping(); 1550 TCW_PTR(th->th.th_sleep_loc, NULL); 1551 th->th.th_sleep_loc_type = flag_unset; 1552 } 1553#ifdef KMP_DEBUG 1554 if (status == ETIMEDOUT) { 1555 if (flag->is_sleeping()) { 1556 KF_TRACE(100, 1557 ("__kmp_suspend_template: T#%d timeout wakeup\n", th_gtid)); 1558 } else { 1559 KF_TRACE(2, ("__kmp_suspend_template: T#%d timeout wakeup, sleep bit " 1560 "not set!\n", 1561 th_gtid)); 1562 TCW_PTR(th->th.th_sleep_loc, NULL); 1563 th->th.th_sleep_loc_type = flag_unset; 1564 } 1565 } else if (flag->is_sleeping()) { 1566 KF_TRACE(100, 1567 ("__kmp_suspend_template: T#%d spurious wakeup\n", th_gtid)); 1568 } 1569#endif 1570 } // while 1571 1572 // Mark the thread as active again (if it was previous marked as inactive) 1573 if (deactivated) { 1574 th->th.th_active = TRUE; 1575 if (TCR_4(th->th.th_in_pool)) { 1576 KMP_ATOMIC_INC(&__kmp_thread_pool_active_nth); 1577 th->th.th_active_in_pool = TRUE; 1578 } 1579 } 1580 } 1581 // We may have had the loop variable set before entering the loop body; 1582 // so we need to reset sleep_loc. 1583 TCW_PTR(th->th.th_sleep_loc, NULL); 1584 th->th.th_sleep_loc_type = flag_unset; 1585 1586 KMP_DEBUG_ASSERT(!flag->is_sleeping()); 1587 KMP_DEBUG_ASSERT(!th->th.th_sleep_loc); 1588#ifdef DEBUG_SUSPEND 1589 { 1590 char buffer[128]; 1591 __kmp_print_cond(buffer, &th->th.th_suspend_cv); 1592 __kmp_printf("__kmp_suspend_template: T#%d has awakened: %s\n", th_gtid, 1593 buffer); 1594 } 1595#endif 1596 1597 __kmp_unlock_suspend_mx(th); 1598 KF_TRACE(30, ("__kmp_suspend_template: T#%d exit\n", th_gtid)); 1599} 1600 1601template <bool C, bool S> 1602void __kmp_suspend_32(int th_gtid, kmp_flag_32<C, S> *flag) { 1603 __kmp_suspend_template(th_gtid, flag); 1604} 1605template <bool C, bool S> 1606void __kmp_suspend_64(int th_gtid, kmp_flag_64<C, S> *flag) { 1607 __kmp_suspend_template(th_gtid, flag); 1608} 1609template <bool C, bool S> 1610void __kmp_atomic_suspend_64(int th_gtid, kmp_atomic_flag_64<C, S> *flag) { 1611 __kmp_suspend_template(th_gtid, flag); 1612} 1613void __kmp_suspend_oncore(int th_gtid, kmp_flag_oncore *flag) { 1614 __kmp_suspend_template(th_gtid, flag); 1615} 1616 1617template void __kmp_suspend_32<false, false>(int, kmp_flag_32<false, false> *); 1618template void __kmp_suspend_64<false, true>(int, kmp_flag_64<false, true> *); 1619template void __kmp_suspend_64<true, false>(int, kmp_flag_64<true, false> *); 1620template void 1621__kmp_atomic_suspend_64<false, true>(int, kmp_atomic_flag_64<false, true> *); 1622template void 1623__kmp_atomic_suspend_64<true, false>(int, kmp_atomic_flag_64<true, false> *); 1624 1625/* This routine signals the thread specified by target_gtid to wake up 1626 after setting the sleep bit indicated by the flag argument to FALSE. 1627 The target thread must already have called __kmp_suspend_template() */ 1628template <class C> 1629static inline void __kmp_resume_template(int target_gtid, C *flag) { 1630 KMP_TIME_DEVELOPER_PARTITIONED_BLOCK(USER_resume); 1631 kmp_info_t *th = __kmp_threads[target_gtid]; 1632 int status; 1633 1634#ifdef KMP_DEBUG 1635 int gtid = TCR_4(__kmp_init_gtid) ? __kmp_get_gtid() : -1; 1636#endif 1637 1638 KF_TRACE(30, ("__kmp_resume_template: T#%d wants to wakeup T#%d enter\n", 1639 gtid, target_gtid)); 1640 KMP_DEBUG_ASSERT(gtid != target_gtid); 1641 1642 __kmp_suspend_initialize_thread(th); 1643 1644 __kmp_lock_suspend_mx(th); 1645 1646 if (!flag || flag != th->th.th_sleep_loc) { 1647 // coming from __kmp_null_resume_wrapper, or thread is now sleeping on a 1648 // different location; wake up at new location 1649 flag = (C *)CCAST(void *, th->th.th_sleep_loc); 1650 } 1651 1652 // First, check if the flag is null or its type has changed. If so, someone 1653 // else woke it up. 1654 if (!flag) { // Thread doesn't appear to be sleeping on anything 1655 KF_TRACE(5, ("__kmp_resume_template: T#%d exiting, thread T#%d already " 1656 "awake: flag(%p)\n", 1657 gtid, target_gtid, (void *)NULL)); 1658 __kmp_unlock_suspend_mx(th); 1659 return; 1660 } else if (flag->get_type() != th->th.th_sleep_loc_type) { 1661 // Flag type does not appear to match this function template; possibly the 1662 // thread is sleeping on something else. Try null resume again. 1663 KF_TRACE( 1664 5, 1665 ("__kmp_resume_template: T#%d retrying, thread T#%d Mismatch flag(%p), " 1666 "spin(%p) type=%d ptr_type=%d\n", 1667 gtid, target_gtid, flag, flag->get(), flag->get_type(), 1668 th->th.th_sleep_loc_type)); 1669 __kmp_unlock_suspend_mx(th); 1670 __kmp_null_resume_wrapper(th); 1671 return; 1672 } else { // if multiple threads are sleeping, flag should be internally 1673 // referring to a specific thread here 1674 if (!flag->is_sleeping()) { 1675 KF_TRACE(5, ("__kmp_resume_template: T#%d exiting, thread T#%d already " 1676 "awake: flag(%p): %u\n", 1677 gtid, target_gtid, flag->get(), (unsigned int)flag->load())); 1678 __kmp_unlock_suspend_mx(th); 1679 return; 1680 } 1681 } 1682 KMP_DEBUG_ASSERT(flag); 1683 flag->unset_sleeping(); 1684 TCW_PTR(th->th.th_sleep_loc, NULL); 1685 th->th.th_sleep_loc_type = flag_unset; 1686 1687 KF_TRACE(5, ("__kmp_resume_template: T#%d about to wakeup T#%d, reset " 1688 "sleep bit for flag's loc(%p): %u\n", 1689 gtid, target_gtid, flag->get(), (unsigned int)flag->load())); 1690 1691#ifdef DEBUG_SUSPEND 1692 { 1693 char buffer[128]; 1694 __kmp_print_cond(buffer, &th->th.th_suspend_cv); 1695 __kmp_printf("__kmp_resume_template: T#%d resuming T#%d: %s\n", gtid, 1696 target_gtid, buffer); 1697 } 1698#endif 1699 status = pthread_cond_signal(&th->th.th_suspend_cv.c_cond); 1700 KMP_CHECK_SYSFAIL("pthread_cond_signal", status); 1701 __kmp_unlock_suspend_mx(th); 1702 KF_TRACE(30, ("__kmp_resume_template: T#%d exiting after signaling wake up" 1703 " for T#%d\n", 1704 gtid, target_gtid)); 1705} 1706 1707template <bool C, bool S> 1708void __kmp_resume_32(int target_gtid, kmp_flag_32<C, S> *flag) { 1709 __kmp_resume_template(target_gtid, flag); 1710} 1711template <bool C, bool S> 1712void __kmp_resume_64(int target_gtid, kmp_flag_64<C, S> *flag) { 1713 __kmp_resume_template(target_gtid, flag); 1714} 1715template <bool C, bool S> 1716void __kmp_atomic_resume_64(int target_gtid, kmp_atomic_flag_64<C, S> *flag) { 1717 __kmp_resume_template(target_gtid, flag); 1718} 1719void __kmp_resume_oncore(int target_gtid, kmp_flag_oncore *flag) { 1720 __kmp_resume_template(target_gtid, flag); 1721} 1722 1723template void __kmp_resume_32<false, true>(int, kmp_flag_32<false, true> *); 1724template void __kmp_resume_32<false, false>(int, kmp_flag_32<false, false> *); 1725template void __kmp_resume_64<false, true>(int, kmp_flag_64<false, true> *); 1726template void 1727__kmp_atomic_resume_64<false, true>(int, kmp_atomic_flag_64<false, true> *); 1728 1729#if KMP_USE_MONITOR 1730void __kmp_resume_monitor() { 1731 KMP_TIME_DEVELOPER_PARTITIONED_BLOCK(USER_resume); 1732 int status; 1733#ifdef KMP_DEBUG 1734 int gtid = TCR_4(__kmp_init_gtid) ? __kmp_get_gtid() : -1; 1735 KF_TRACE(30, ("__kmp_resume_monitor: T#%d wants to wakeup T#%d enter\n", gtid, 1736 KMP_GTID_MONITOR)); 1737 KMP_DEBUG_ASSERT(gtid != KMP_GTID_MONITOR); 1738#endif 1739 status = pthread_mutex_lock(&__kmp_wait_mx.m_mutex); 1740 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status); 1741#ifdef DEBUG_SUSPEND 1742 { 1743 char buffer[128]; 1744 __kmp_print_cond(buffer, &__kmp_wait_cv.c_cond); 1745 __kmp_printf("__kmp_resume_monitor: T#%d resuming T#%d: %s\n", gtid, 1746 KMP_GTID_MONITOR, buffer); 1747 } 1748#endif 1749 status = pthread_cond_signal(&__kmp_wait_cv.c_cond); 1750 KMP_CHECK_SYSFAIL("pthread_cond_signal", status); 1751 status = pthread_mutex_unlock(&__kmp_wait_mx.m_mutex); 1752 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status); 1753 KF_TRACE(30, ("__kmp_resume_monitor: T#%d exiting after signaling wake up" 1754 " for T#%d\n", 1755 gtid, KMP_GTID_MONITOR)); 1756} 1757#endif // KMP_USE_MONITOR 1758 1759void __kmp_yield() { sched_yield(); } 1760 1761void __kmp_gtid_set_specific(int gtid) { 1762 if (__kmp_init_gtid) { 1763 int status; 1764 status = pthread_setspecific(__kmp_gtid_threadprivate_key, 1765 (void *)(intptr_t)(gtid + 1)); 1766 KMP_CHECK_SYSFAIL("pthread_setspecific", status); 1767 } else { 1768 KA_TRACE(50, ("__kmp_gtid_set_specific: runtime shutdown, returning\n")); 1769 } 1770} 1771 1772int __kmp_gtid_get_specific() { 1773 int gtid; 1774 if (!__kmp_init_gtid) { 1775 KA_TRACE(50, ("__kmp_gtid_get_specific: runtime shutdown, returning " 1776 "KMP_GTID_SHUTDOWN\n")); 1777 return KMP_GTID_SHUTDOWN; 1778 } 1779 gtid = (int)(size_t)pthread_getspecific(__kmp_gtid_threadprivate_key); 1780 if (gtid == 0) { 1781 gtid = KMP_GTID_DNE; 1782 } else { 1783 gtid--; 1784 } 1785 KA_TRACE(50, ("__kmp_gtid_get_specific: key:%d gtid:%d\n", 1786 __kmp_gtid_threadprivate_key, gtid)); 1787 return gtid; 1788} 1789 1790double __kmp_read_cpu_time(void) { 1791 /*clock_t t;*/ 1792 struct tms buffer; 1793 1794 /*t =*/times(&buffer); 1795 1796 return (double)(buffer.tms_utime + buffer.tms_cutime) / 1797 (double)CLOCKS_PER_SEC; 1798} 1799 1800int __kmp_read_system_info(struct kmp_sys_info *info) { 1801 int status; 1802 struct rusage r_usage; 1803 1804 memset(info, 0, sizeof(*info)); 1805 1806 status = getrusage(RUSAGE_SELF, &r_usage); 1807 KMP_CHECK_SYSFAIL_ERRNO("getrusage", status); 1808 1809#if !KMP_OS_WASI 1810 // The maximum resident set size utilized (in kilobytes) 1811 info->maxrss = r_usage.ru_maxrss; 1812 // The number of page faults serviced without any I/O 1813 info->minflt = r_usage.ru_minflt; 1814 // The number of page faults serviced that required I/O 1815 info->majflt = r_usage.ru_majflt; 1816 // The number of times a process was "swapped" out of memory 1817 info->nswap = r_usage.ru_nswap; 1818 // The number of times the file system had to perform input 1819 info->inblock = r_usage.ru_inblock; 1820 // The number of times the file system had to perform output 1821 info->oublock = r_usage.ru_oublock; 1822 // The number of times a context switch was voluntarily 1823 info->nvcsw = r_usage.ru_nvcsw; 1824 // The number of times a context switch was forced 1825 info->nivcsw = r_usage.ru_nivcsw; 1826#endif 1827 1828 return (status != 0); 1829} 1830 1831void __kmp_read_system_time(double *delta) { 1832 double t_ns; 1833 struct timeval tval; 1834 struct timespec stop; 1835 int status; 1836 1837 status = gettimeofday(&tval, NULL); 1838 KMP_CHECK_SYSFAIL_ERRNO("gettimeofday", status); 1839 TIMEVAL_TO_TIMESPEC(&tval, &stop); 1840 t_ns = (double)(TS2NS(stop) - TS2NS(__kmp_sys_timer_data.start)); 1841 *delta = (t_ns * 1e-9); 1842} 1843 1844void __kmp_clear_system_time(void) { 1845 struct timeval tval; 1846 int status; 1847 status = gettimeofday(&tval, NULL); 1848 KMP_CHECK_SYSFAIL_ERRNO("gettimeofday", status); 1849 TIMEVAL_TO_TIMESPEC(&tval, &__kmp_sys_timer_data.start); 1850} 1851 1852static int __kmp_get_xproc(void) { 1853 1854 int r = 0; 1855 1856#if KMP_OS_LINUX 1857 1858 __kmp_type_convert(sysconf(_SC_NPROCESSORS_CONF), &(r)); 1859 1860#elif KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD || KMP_OS_OPENBSD || \ 1861 KMP_OS_HURD || KMP_OS_SOLARIS || KMP_OS_WASI || KMP_OS_AIX 1862 1863 __kmp_type_convert(sysconf(_SC_NPROCESSORS_ONLN), &(r)); 1864 1865#elif KMP_OS_DARWIN 1866 1867 // Bug C77011 High "OpenMP Threads and number of active cores". 1868 1869 // Find the number of available CPUs. 1870 kern_return_t rc; 1871 host_basic_info_data_t info; 1872 mach_msg_type_number_t num = HOST_BASIC_INFO_COUNT; 1873 rc = host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t)&info, &num); 1874 if (rc == 0 && num == HOST_BASIC_INFO_COUNT) { 1875 // Cannot use KA_TRACE() here because this code works before trace support 1876 // is initialized. 1877 r = info.avail_cpus; 1878 } else { 1879 KMP_WARNING(CantGetNumAvailCPU); 1880 KMP_INFORM(AssumedNumCPU); 1881 } 1882 1883#else 1884 1885#error "Unknown or unsupported OS." 1886 1887#endif 1888 1889 return r > 0 ? r : 2; /* guess value of 2 if OS told us 0 */ 1890 1891} // __kmp_get_xproc 1892 1893int __kmp_read_from_file(char const *path, char const *format, ...) { 1894 int result; 1895 va_list args; 1896 1897 va_start(args, format); 1898 FILE *f = fopen(path, "rb"); 1899 if (f == NULL) { 1900 va_end(args); 1901 return 0; 1902 } 1903 result = vfscanf(f, format, args); 1904 fclose(f); 1905 va_end(args); 1906 1907 return result; 1908} 1909 1910void __kmp_runtime_initialize(void) { 1911 int status; 1912 pthread_mutexattr_t mutex_attr; 1913 pthread_condattr_t cond_attr; 1914 1915 if (__kmp_init_runtime) { 1916 return; 1917 } 1918 1919#if (KMP_ARCH_X86 || KMP_ARCH_X86_64) 1920 if (!__kmp_cpuinfo.initialized) { 1921 __kmp_query_cpuid(&__kmp_cpuinfo); 1922 } 1923#endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */ 1924 1925 __kmp_xproc = __kmp_get_xproc(); 1926 1927#if !KMP_32_BIT_ARCH 1928 struct rlimit rlim; 1929 // read stack size of calling thread, save it as default for worker threads; 1930 // this should be done before reading environment variables 1931 status = getrlimit(RLIMIT_STACK, &rlim); 1932 if (status == 0) { // success? 1933 __kmp_stksize = rlim.rlim_cur; 1934 __kmp_check_stksize(&__kmp_stksize); // check value and adjust if needed 1935 } 1936#endif /* KMP_32_BIT_ARCH */ 1937 1938 if (sysconf(_SC_THREADS)) { 1939 1940 /* Query the maximum number of threads */ 1941 __kmp_type_convert(sysconf(_SC_THREAD_THREADS_MAX), &(__kmp_sys_max_nth)); 1942#ifdef __ve__ 1943 if (__kmp_sys_max_nth == -1) { 1944 // VE's pthread supports only up to 64 threads per a VE process. 1945 // So we use that KMP_MAX_NTH (predefined as 64) here. 1946 __kmp_sys_max_nth = KMP_MAX_NTH; 1947 } 1948#else 1949 if (__kmp_sys_max_nth == -1) { 1950 /* Unlimited threads for NPTL */ 1951 __kmp_sys_max_nth = INT_MAX; 1952 } else if (__kmp_sys_max_nth <= 1) { 1953 /* Can't tell, just use PTHREAD_THREADS_MAX */ 1954 __kmp_sys_max_nth = KMP_MAX_NTH; 1955 } 1956#endif 1957 1958 /* Query the minimum stack size */ 1959 __kmp_sys_min_stksize = sysconf(_SC_THREAD_STACK_MIN); 1960 if (__kmp_sys_min_stksize <= 1) { 1961 __kmp_sys_min_stksize = KMP_MIN_STKSIZE; 1962 } 1963 } 1964 1965 /* Set up minimum number of threads to switch to TLS gtid */ 1966 __kmp_tls_gtid_min = KMP_TLS_GTID_MIN; 1967 1968 status = pthread_key_create(&__kmp_gtid_threadprivate_key, 1969 __kmp_internal_end_dest); 1970 KMP_CHECK_SYSFAIL("pthread_key_create", status); 1971 status = pthread_mutexattr_init(&mutex_attr); 1972 KMP_CHECK_SYSFAIL("pthread_mutexattr_init", status); 1973 status = pthread_mutex_init(&__kmp_wait_mx.m_mutex, &mutex_attr); 1974 KMP_CHECK_SYSFAIL("pthread_mutex_init", status); 1975 status = pthread_mutexattr_destroy(&mutex_attr); 1976 KMP_CHECK_SYSFAIL("pthread_mutexattr_destroy", status); 1977 status = pthread_condattr_init(&cond_attr); 1978 KMP_CHECK_SYSFAIL("pthread_condattr_init", status); 1979 status = pthread_cond_init(&__kmp_wait_cv.c_cond, &cond_attr); 1980 KMP_CHECK_SYSFAIL("pthread_cond_init", status); 1981 status = pthread_condattr_destroy(&cond_attr); 1982 KMP_CHECK_SYSFAIL("pthread_condattr_destroy", status); 1983#if USE_ITT_BUILD 1984 __kmp_itt_initialize(); 1985#endif /* USE_ITT_BUILD */ 1986 1987 __kmp_init_runtime = TRUE; 1988} 1989 1990void __kmp_runtime_destroy(void) { 1991 int status; 1992 1993 if (!__kmp_init_runtime) { 1994 return; // Nothing to do. 1995 } 1996 1997#if USE_ITT_BUILD 1998 __kmp_itt_destroy(); 1999#endif /* USE_ITT_BUILD */ 2000 2001 status = pthread_key_delete(__kmp_gtid_threadprivate_key); 2002 KMP_CHECK_SYSFAIL("pthread_key_delete", status); 2003 2004 status = pthread_mutex_destroy(&__kmp_wait_mx.m_mutex); 2005 if (status != 0 && status != EBUSY) { 2006 KMP_SYSFAIL("pthread_mutex_destroy", status); 2007 } 2008 status = pthread_cond_destroy(&__kmp_wait_cv.c_cond); 2009 if (status != 0 && status != EBUSY) { 2010 KMP_SYSFAIL("pthread_cond_destroy", status); 2011 } 2012#if KMP_AFFINITY_SUPPORTED 2013 __kmp_affinity_uninitialize(); 2014#endif 2015 2016 __kmp_init_runtime = FALSE; 2017} 2018 2019/* Put the thread to sleep for a time period */ 2020/* NOTE: not currently used anywhere */ 2021void __kmp_thread_sleep(int millis) { sleep((millis + 500) / 1000); } 2022 2023/* Calculate the elapsed wall clock time for the user */ 2024void __kmp_elapsed(double *t) { 2025 int status; 2026#ifdef FIX_SGI_CLOCK 2027 struct timespec ts; 2028 2029 status = clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts); 2030 KMP_CHECK_SYSFAIL_ERRNO("clock_gettime", status); 2031 *t = 2032 (double)ts.tv_nsec * (1.0 / (double)KMP_NSEC_PER_SEC) + (double)ts.tv_sec; 2033#else 2034 struct timeval tv; 2035 2036 status = gettimeofday(&tv, NULL); 2037 KMP_CHECK_SYSFAIL_ERRNO("gettimeofday", status); 2038 *t = 2039 (double)tv.tv_usec * (1.0 / (double)KMP_USEC_PER_SEC) + (double)tv.tv_sec; 2040#endif 2041} 2042 2043/* Calculate the elapsed wall clock tick for the user */ 2044void __kmp_elapsed_tick(double *t) { *t = 1 / (double)CLOCKS_PER_SEC; } 2045 2046/* Return the current time stamp in nsec */ 2047kmp_uint64 __kmp_now_nsec() { 2048 struct timeval t; 2049 gettimeofday(&t, NULL); 2050 kmp_uint64 nsec = (kmp_uint64)KMP_NSEC_PER_SEC * (kmp_uint64)t.tv_sec + 2051 (kmp_uint64)1000 * (kmp_uint64)t.tv_usec; 2052 return nsec; 2053} 2054 2055#if KMP_ARCH_X86 || KMP_ARCH_X86_64 2056/* Measure clock ticks per millisecond */ 2057void __kmp_initialize_system_tick() { 2058 kmp_uint64 now, nsec2, diff; 2059 kmp_uint64 delay = 1000000; // ~450 usec on most machines. 2060 kmp_uint64 nsec = __kmp_now_nsec(); 2061 kmp_uint64 goal = __kmp_hardware_timestamp() + delay; 2062 while ((now = __kmp_hardware_timestamp()) < goal) 2063 ; 2064 nsec2 = __kmp_now_nsec(); 2065 diff = nsec2 - nsec; 2066 if (diff > 0) { 2067 double tpus = 1000.0 * (double)(delay + (now - goal)) / (double)diff; 2068 if (tpus > 0.0) { 2069 __kmp_ticks_per_msec = (kmp_uint64)(tpus * 1000.0); 2070 __kmp_ticks_per_usec = (kmp_uint64)tpus; 2071 } 2072 } 2073} 2074#endif 2075 2076/* Determine whether the given address is mapped into the current address 2077 space. */ 2078 2079int __kmp_is_address_mapped(void *addr) { 2080 2081 int found = 0; 2082 int rc; 2083 2084#if KMP_OS_LINUX || KMP_OS_HURD 2085 2086 /* On GNUish OSes, read the /proc/<pid>/maps pseudo-file to get all the 2087 address ranges mapped into the address space. */ 2088 2089 char *name = __kmp_str_format("/proc/%d/maps", getpid()); 2090 FILE *file = NULL; 2091 2092 file = fopen(name, "r"); 2093 KMP_ASSERT(file != NULL); 2094 2095 for (;;) { 2096 2097 void *beginning = NULL; 2098 void *ending = NULL; 2099 char perms[5]; 2100 2101 rc = fscanf(file, "%p-%p %4s %*[^\n]\n", &beginning, &ending, perms); 2102 if (rc == EOF) { 2103 break; 2104 } 2105 KMP_ASSERT(rc == 3 && 2106 KMP_STRLEN(perms) == 4); // Make sure all fields are read. 2107 2108 // Ending address is not included in the region, but beginning is. 2109 if ((addr >= beginning) && (addr < ending)) { 2110 perms[2] = 0; // 3th and 4th character does not matter. 2111 if (strcmp(perms, "rw") == 0) { 2112 // Memory we are looking for should be readable and writable. 2113 found = 1; 2114 } 2115 break; 2116 } 2117 } 2118 2119 // Free resources. 2120 fclose(file); 2121 KMP_INTERNAL_FREE(name); 2122#elif KMP_OS_FREEBSD 2123 char *buf; 2124 size_t lstsz; 2125 int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, getpid()}; 2126 rc = sysctl(mib, 4, NULL, &lstsz, NULL, 0); 2127 if (rc < 0) 2128 return 0; 2129 // We pass from number of vm entry's semantic 2130 // to size of whole entry map list. 2131 lstsz = lstsz * 4 / 3; 2132 buf = reinterpret_cast<char *>(KMP_INTERNAL_MALLOC(lstsz)); 2133 rc = sysctl(mib, 4, buf, &lstsz, NULL, 0); 2134 if (rc < 0) { 2135 KMP_INTERNAL_FREE(buf); 2136 return 0; 2137 } 2138 2139 char *lw = buf; 2140 char *up = buf + lstsz; 2141 2142 while (lw < up) { 2143 struct kinfo_vmentry *cur = reinterpret_cast<struct kinfo_vmentry *>(lw); 2144 size_t cursz = cur->kve_structsize; 2145 if (cursz == 0) 2146 break; 2147 void *start = reinterpret_cast<void *>(cur->kve_start); 2148 void *end = reinterpret_cast<void *>(cur->kve_end); 2149 // Readable/Writable addresses within current map entry 2150 if ((addr >= start) && (addr < end)) { 2151 if ((cur->kve_protection & KVME_PROT_READ) != 0 && 2152 (cur->kve_protection & KVME_PROT_WRITE) != 0) { 2153 found = 1; 2154 break; 2155 } 2156 } 2157 lw += cursz; 2158 } 2159 KMP_INTERNAL_FREE(buf); 2160 2161#elif KMP_OS_DARWIN 2162 2163 /* On OS X*, /proc pseudo filesystem is not available. Try to read memory 2164 using vm interface. */ 2165 2166 int buffer; 2167 vm_size_t count; 2168 rc = vm_read_overwrite( 2169 mach_task_self(), // Task to read memory of. 2170 (vm_address_t)(addr), // Address to read from. 2171 1, // Number of bytes to be read. 2172 (vm_address_t)(&buffer), // Address of buffer to save read bytes in. 2173 &count // Address of var to save number of read bytes in. 2174 ); 2175 if (rc == 0) { 2176 // Memory successfully read. 2177 found = 1; 2178 } 2179 2180#elif KMP_OS_NETBSD 2181 2182 int mib[5]; 2183 mib[0] = CTL_VM; 2184 mib[1] = VM_PROC; 2185 mib[2] = VM_PROC_MAP; 2186 mib[3] = getpid(); 2187 mib[4] = sizeof(struct kinfo_vmentry); 2188 2189 size_t size; 2190 rc = sysctl(mib, __arraycount(mib), NULL, &size, NULL, 0); 2191 KMP_ASSERT(!rc); 2192 KMP_ASSERT(size); 2193 2194 size = size * 4 / 3; 2195 struct kinfo_vmentry *kiv = (struct kinfo_vmentry *)KMP_INTERNAL_MALLOC(size); 2196 KMP_ASSERT(kiv); 2197 2198 rc = sysctl(mib, __arraycount(mib), kiv, &size, NULL, 0); 2199 KMP_ASSERT(!rc); 2200 KMP_ASSERT(size); 2201 2202 for (size_t i = 0; i < size; i++) { 2203 if (kiv[i].kve_start >= (uint64_t)addr && 2204 kiv[i].kve_end <= (uint64_t)addr) { 2205 found = 1; 2206 break; 2207 } 2208 } 2209 KMP_INTERNAL_FREE(kiv); 2210#elif KMP_OS_OPENBSD 2211 2212 int mib[3]; 2213 mib[0] = CTL_KERN; 2214 mib[1] = KERN_PROC_VMMAP; 2215 mib[2] = getpid(); 2216 2217 size_t size; 2218 uint64_t end; 2219 rc = sysctl(mib, 3, NULL, &size, NULL, 0); 2220 KMP_ASSERT(!rc); 2221 KMP_ASSERT(size); 2222 end = size; 2223 2224 struct kinfo_vmentry kiv = {.kve_start = 0}; 2225 2226 while ((rc = sysctl(mib, 3, &kiv, &size, NULL, 0)) == 0) { 2227 KMP_ASSERT(size); 2228 if (kiv.kve_end == end) 2229 break; 2230 2231 if (kiv.kve_start >= (uint64_t)addr && kiv.kve_end <= (uint64_t)addr) { 2232 found = 1; 2233 break; 2234 } 2235 kiv.kve_start += 1; 2236 } 2237#elif KMP_OS_WASI 2238 found = (int)addr < (__builtin_wasm_memory_size(0) * PAGESIZE); 2239#elif KMP_OS_DRAGONFLY || KMP_OS_SOLARIS || KMP_OS_AIX 2240 2241 (void)rc; 2242 // FIXME(DragonFly, Solaris, AIX): Implement this 2243 found = 1; 2244 2245#else 2246 2247#error "Unknown or unsupported OS" 2248 2249#endif 2250 2251 return found; 2252 2253} // __kmp_is_address_mapped 2254 2255#ifdef USE_LOAD_BALANCE 2256 2257#if KMP_OS_DARWIN || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD || \ 2258 KMP_OS_OPENBSD || KMP_OS_SOLARIS 2259 2260// The function returns the rounded value of the system load average 2261// during given time interval which depends on the value of 2262// __kmp_load_balance_interval variable (default is 60 sec, other values 2263// may be 300 sec or 900 sec). 2264// It returns -1 in case of error. 2265int __kmp_get_load_balance(int max) { 2266 double averages[3]; 2267 int ret_avg = 0; 2268 2269 int res = getloadavg(averages, 3); 2270 2271 // Check __kmp_load_balance_interval to determine which of averages to use. 2272 // getloadavg() may return the number of samples less than requested that is 2273 // less than 3. 2274 if (__kmp_load_balance_interval < 180 && (res >= 1)) { 2275 ret_avg = (int)averages[0]; // 1 min 2276 } else if ((__kmp_load_balance_interval >= 180 && 2277 __kmp_load_balance_interval < 600) && 2278 (res >= 2)) { 2279 ret_avg = (int)averages[1]; // 5 min 2280 } else if ((__kmp_load_balance_interval >= 600) && (res == 3)) { 2281 ret_avg = (int)averages[2]; // 15 min 2282 } else { // Error occurred 2283 return -1; 2284 } 2285 2286 return ret_avg; 2287} 2288 2289#else // Linux* OS 2290 2291// The function returns number of running (not sleeping) threads, or -1 in case 2292// of error. Error could be reported if Linux* OS kernel too old (without 2293// "/proc" support). Counting running threads stops if max running threads 2294// encountered. 2295int __kmp_get_load_balance(int max) { 2296 static int permanent_error = 0; 2297 static int glb_running_threads = 0; // Saved count of the running threads for 2298 // the thread balance algorithm 2299 static double glb_call_time = 0; /* Thread balance algorithm call time */ 2300 2301 int running_threads = 0; // Number of running threads in the system. 2302 2303 DIR *proc_dir = NULL; // Handle of "/proc/" directory. 2304 struct dirent *proc_entry = NULL; 2305 2306 kmp_str_buf_t task_path; // "/proc/<pid>/task/<tid>/" path. 2307 DIR *task_dir = NULL; // Handle of "/proc/<pid>/task/<tid>/" directory. 2308 struct dirent *task_entry = NULL; 2309 int task_path_fixed_len; 2310 2311 kmp_str_buf_t stat_path; // "/proc/<pid>/task/<tid>/stat" path. 2312 int stat_file = -1; 2313 int stat_path_fixed_len; 2314 2315#ifdef KMP_DEBUG 2316 int total_processes = 0; // Total number of processes in system. 2317#endif 2318 2319 double call_time = 0.0; 2320 2321 __kmp_str_buf_init(&task_path); 2322 __kmp_str_buf_init(&stat_path); 2323 2324 __kmp_elapsed(&call_time); 2325 2326 if (glb_call_time && 2327 (call_time - glb_call_time < __kmp_load_balance_interval)) { 2328 running_threads = glb_running_threads; 2329 goto finish; 2330 } 2331 2332 glb_call_time = call_time; 2333 2334 // Do not spend time on scanning "/proc/" if we have a permanent error. 2335 if (permanent_error) { 2336 running_threads = -1; 2337 goto finish; 2338 } 2339 2340 if (max <= 0) { 2341 max = INT_MAX; 2342 } 2343 2344 // Open "/proc/" directory. 2345 proc_dir = opendir("/proc"); 2346 if (proc_dir == NULL) { 2347 // Cannot open "/proc/". Probably the kernel does not support it. Return an 2348 // error now and in subsequent calls. 2349 running_threads = -1; 2350 permanent_error = 1; 2351 goto finish; 2352 } 2353 2354 // Initialize fixed part of task_path. This part will not change. 2355 __kmp_str_buf_cat(&task_path, "/proc/", 6); 2356 task_path_fixed_len = task_path.used; // Remember number of used characters. 2357 2358 proc_entry = readdir(proc_dir); 2359 while (proc_entry != NULL) { 2360#if KMP_OS_AIX 2361 // Proc entry name starts with a digit. Assume it is a process' directory. 2362 if (isdigit(proc_entry->d_name[0])) { 2363#else 2364 // Proc entry is a directory and name starts with a digit. Assume it is a 2365 // process' directory. 2366 if (proc_entry->d_type == DT_DIR && isdigit(proc_entry->d_name[0])) { 2367#endif 2368 2369#ifdef KMP_DEBUG 2370 ++total_processes; 2371#endif 2372 // Make sure init process is the very first in "/proc", so we can replace 2373 // strcmp( proc_entry->d_name, "1" ) == 0 with simpler total_processes == 2374 // 1. We are going to check that total_processes == 1 => d_name == "1" is 2375 // true (where "=>" is implication). Since C++ does not have => operator, 2376 // let us replace it with its equivalent: a => b == ! a || b. 2377 KMP_DEBUG_ASSERT(total_processes != 1 || 2378 strcmp(proc_entry->d_name, "1") == 0); 2379 2380 // Construct task_path. 2381 task_path.used = task_path_fixed_len; // Reset task_path to "/proc/". 2382 __kmp_str_buf_cat(&task_path, proc_entry->d_name, 2383 KMP_STRLEN(proc_entry->d_name)); 2384 __kmp_str_buf_cat(&task_path, "/task", 5); 2385 2386 task_dir = opendir(task_path.str); 2387 if (task_dir == NULL) { 2388 // Process can finish between reading "/proc/" directory entry and 2389 // opening process' "task/" directory. So, in general case we should not 2390 // complain, but have to skip this process and read the next one. But on 2391 // systems with no "task/" support we will spend lot of time to scan 2392 // "/proc/" tree again and again without any benefit. "init" process 2393 // (its pid is 1) should exist always, so, if we cannot open 2394 // "/proc/1/task/" directory, it means "task/" is not supported by 2395 // kernel. Report an error now and in the future. 2396 if (strcmp(proc_entry->d_name, "1") == 0) { 2397 running_threads = -1; 2398 permanent_error = 1; 2399 goto finish; 2400 } 2401 } else { 2402 // Construct fixed part of stat file path. 2403 __kmp_str_buf_clear(&stat_path); 2404 __kmp_str_buf_cat(&stat_path, task_path.str, task_path.used); 2405 __kmp_str_buf_cat(&stat_path, "/", 1); 2406 stat_path_fixed_len = stat_path.used; 2407 2408 task_entry = readdir(task_dir); 2409 while (task_entry != NULL) { 2410 // It is a directory and name starts with a digit. 2411#if KMP_OS_AIX 2412 if (isdigit(task_entry->d_name[0])) { 2413#else 2414 if (proc_entry->d_type == DT_DIR && isdigit(task_entry->d_name[0])) { 2415#endif 2416 2417 // Construct complete stat file path. Easiest way would be: 2418 // __kmp_str_buf_print( & stat_path, "%s/%s/stat", task_path.str, 2419 // task_entry->d_name ); 2420 // but seriae of __kmp_str_buf_cat works a bit faster. 2421 stat_path.used = 2422 stat_path_fixed_len; // Reset stat path to its fixed part. 2423 __kmp_str_buf_cat(&stat_path, task_entry->d_name, 2424 KMP_STRLEN(task_entry->d_name)); 2425 __kmp_str_buf_cat(&stat_path, "/stat", 5); 2426 2427 // Note: Low-level API (open/read/close) is used. High-level API 2428 // (fopen/fclose) works ~ 30 % slower. 2429 stat_file = open(stat_path.str, O_RDONLY); 2430 if (stat_file == -1) { 2431 // We cannot report an error because task (thread) can terminate 2432 // just before reading this file. 2433 } else { 2434 /* Content of "stat" file looks like: 2435 24285 (program) S ... 2436 2437 It is a single line (if program name does not include funny 2438 symbols). First number is a thread id, then name of executable 2439 file name in paretheses, then state of the thread. We need just 2440 thread state. 2441 2442 Good news: Length of program name is 15 characters max. Longer 2443 names are truncated. 2444 2445 Thus, we need rather short buffer: 15 chars for program name + 2446 2 parenthesis, + 3 spaces + ~7 digits of pid = 37. 2447 2448 Bad news: Program name may contain special symbols like space, 2449 closing parenthesis, or even new line. This makes parsing 2450 "stat" file not 100 % reliable. In case of fanny program names 2451 parsing may fail (report incorrect thread state). 2452 2453 Parsing "status" file looks more promissing (due to different 2454 file structure and escaping special symbols) but reading and 2455 parsing of "status" file works slower. 2456 -- ln 2457 */ 2458 char buffer[65]; 2459 ssize_t len; 2460 len = read(stat_file, buffer, sizeof(buffer) - 1); 2461 if (len >= 0) { 2462 buffer[len] = 0; 2463 // Using scanf: 2464 // sscanf( buffer, "%*d (%*s) %c ", & state ); 2465 // looks very nice, but searching for a closing parenthesis 2466 // works a bit faster. 2467 char *close_parent = strstr(buffer, ") "); 2468 if (close_parent != NULL) { 2469 char state = *(close_parent + 2); 2470 if (state == 'R') { 2471 ++running_threads; 2472 if (running_threads >= max) { 2473 goto finish; 2474 } 2475 } 2476 } 2477 } 2478 close(stat_file); 2479 stat_file = -1; 2480 } 2481 } 2482 task_entry = readdir(task_dir); 2483 } 2484 closedir(task_dir); 2485 task_dir = NULL; 2486 } 2487 } 2488 proc_entry = readdir(proc_dir); 2489 } 2490 2491 // There _might_ be a timing hole where the thread executing this 2492 // code get skipped in the load balance, and running_threads is 0. 2493 // Assert in the debug builds only!!! 2494 KMP_DEBUG_ASSERT(running_threads > 0); 2495 if (running_threads <= 0) { 2496 running_threads = 1; 2497 } 2498 2499finish: // Clean up and exit. 2500 if (proc_dir != NULL) { 2501 closedir(proc_dir); 2502 } 2503 __kmp_str_buf_free(&task_path); 2504 if (task_dir != NULL) { 2505 closedir(task_dir); 2506 } 2507 __kmp_str_buf_free(&stat_path); 2508 if (stat_file != -1) { 2509 close(stat_file); 2510 } 2511 2512 glb_running_threads = running_threads; 2513 2514 return running_threads; 2515 2516} // __kmp_get_load_balance 2517 2518#endif // KMP_OS_DARWIN 2519 2520#endif // USE_LOAD_BALANCE 2521 2522#if !(KMP_ARCH_X86 || KMP_ARCH_X86_64 || KMP_MIC || \ 2523 ((KMP_OS_LINUX || KMP_OS_DARWIN) && KMP_ARCH_AARCH64) || \ 2524 KMP_ARCH_PPC64 || KMP_ARCH_RISCV64 || KMP_ARCH_LOONGARCH64 || \ 2525 KMP_ARCH_ARM || KMP_ARCH_VE || KMP_ARCH_S390X || KMP_ARCH_PPC_XCOFF) 2526 2527// we really only need the case with 1 argument, because CLANG always build 2528// a struct of pointers to shared variables referenced in the outlined function 2529int __kmp_invoke_microtask(microtask_t pkfn, int gtid, int tid, int argc, 2530 void *p_argv[] 2531#if OMPT_SUPPORT 2532 , 2533 void **exit_frame_ptr 2534#endif 2535) { 2536#if OMPT_SUPPORT 2537 *exit_frame_ptr = OMPT_GET_FRAME_ADDRESS(0); 2538#endif 2539 2540 switch (argc) { 2541 default: 2542 fprintf(stderr, "Too many args to microtask: %d!\n", argc); 2543 fflush(stderr); 2544 exit(-1); 2545 case 0: 2546 (*pkfn)(>id, &tid); 2547 break; 2548 case 1: 2549 (*pkfn)(>id, &tid, p_argv[0]); 2550 break; 2551 case 2: 2552 (*pkfn)(>id, &tid, p_argv[0], p_argv[1]); 2553 break; 2554 case 3: 2555 (*pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2]); 2556 break; 2557 case 4: 2558 (*pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2], p_argv[3]); 2559 break; 2560 case 5: 2561 (*pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2], p_argv[3], p_argv[4]); 2562 break; 2563 case 6: 2564 (*pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2], p_argv[3], p_argv[4], 2565 p_argv[5]); 2566 break; 2567 case 7: 2568 (*pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2], p_argv[3], p_argv[4], 2569 p_argv[5], p_argv[6]); 2570 break; 2571 case 8: 2572 (*pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2], p_argv[3], p_argv[4], 2573 p_argv[5], p_argv[6], p_argv[7]); 2574 break; 2575 case 9: 2576 (*pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2], p_argv[3], p_argv[4], 2577 p_argv[5], p_argv[6], p_argv[7], p_argv[8]); 2578 break; 2579 case 10: 2580 (*pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2], p_argv[3], p_argv[4], 2581 p_argv[5], p_argv[6], p_argv[7], p_argv[8], p_argv[9]); 2582 break; 2583 case 11: 2584 (*pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2], p_argv[3], p_argv[4], 2585 p_argv[5], p_argv[6], p_argv[7], p_argv[8], p_argv[9], p_argv[10]); 2586 break; 2587 case 12: 2588 (*pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2], p_argv[3], p_argv[4], 2589 p_argv[5], p_argv[6], p_argv[7], p_argv[8], p_argv[9], p_argv[10], 2590 p_argv[11]); 2591 break; 2592 case 13: 2593 (*pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2], p_argv[3], p_argv[4], 2594 p_argv[5], p_argv[6], p_argv[7], p_argv[8], p_argv[9], p_argv[10], 2595 p_argv[11], p_argv[12]); 2596 break; 2597 case 14: 2598 (*pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2], p_argv[3], p_argv[4], 2599 p_argv[5], p_argv[6], p_argv[7], p_argv[8], p_argv[9], p_argv[10], 2600 p_argv[11], p_argv[12], p_argv[13]); 2601 break; 2602 case 15: 2603 (*pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2], p_argv[3], p_argv[4], 2604 p_argv[5], p_argv[6], p_argv[7], p_argv[8], p_argv[9], p_argv[10], 2605 p_argv[11], p_argv[12], p_argv[13], p_argv[14]); 2606 break; 2607 } 2608 2609 return 1; 2610} 2611 2612#endif 2613 2614#if KMP_OS_LINUX 2615// Functions for hidden helper task 2616namespace { 2617// Condition variable for initializing hidden helper team 2618pthread_cond_t hidden_helper_threads_initz_cond_var; 2619pthread_mutex_t hidden_helper_threads_initz_lock; 2620volatile int hidden_helper_initz_signaled = FALSE; 2621 2622// Condition variable for deinitializing hidden helper team 2623pthread_cond_t hidden_helper_threads_deinitz_cond_var; 2624pthread_mutex_t hidden_helper_threads_deinitz_lock; 2625volatile int hidden_helper_deinitz_signaled = FALSE; 2626 2627// Condition variable for the wrapper function of main thread 2628pthread_cond_t hidden_helper_main_thread_cond_var; 2629pthread_mutex_t hidden_helper_main_thread_lock; 2630volatile int hidden_helper_main_thread_signaled = FALSE; 2631 2632// Semaphore for worker threads. We don't use condition variable here in case 2633// that when multiple signals are sent at the same time, only one thread might 2634// be waken. 2635sem_t hidden_helper_task_sem; 2636} // namespace 2637 2638void __kmp_hidden_helper_worker_thread_wait() { 2639 int status = sem_wait(&hidden_helper_task_sem); 2640 KMP_CHECK_SYSFAIL("sem_wait", status); 2641} 2642 2643void __kmp_do_initialize_hidden_helper_threads() { 2644 // Initialize condition variable 2645 int status = 2646 pthread_cond_init(&hidden_helper_threads_initz_cond_var, nullptr); 2647 KMP_CHECK_SYSFAIL("pthread_cond_init", status); 2648 2649 status = pthread_cond_init(&hidden_helper_threads_deinitz_cond_var, nullptr); 2650 KMP_CHECK_SYSFAIL("pthread_cond_init", status); 2651 2652 status = pthread_cond_init(&hidden_helper_main_thread_cond_var, nullptr); 2653 KMP_CHECK_SYSFAIL("pthread_cond_init", status); 2654 2655 status = pthread_mutex_init(&hidden_helper_threads_initz_lock, nullptr); 2656 KMP_CHECK_SYSFAIL("pthread_mutex_init", status); 2657 2658 status = pthread_mutex_init(&hidden_helper_threads_deinitz_lock, nullptr); 2659 KMP_CHECK_SYSFAIL("pthread_mutex_init", status); 2660 2661 status = pthread_mutex_init(&hidden_helper_main_thread_lock, nullptr); 2662 KMP_CHECK_SYSFAIL("pthread_mutex_init", status); 2663 2664 // Initialize the semaphore 2665 status = sem_init(&hidden_helper_task_sem, 0, 0); 2666 KMP_CHECK_SYSFAIL("sem_init", status); 2667 2668 // Create a new thread to finish initialization 2669 pthread_t handle; 2670 status = pthread_create( 2671 &handle, nullptr, 2672 [](void *) -> void * { 2673 __kmp_hidden_helper_threads_initz_routine(); 2674 return nullptr; 2675 }, 2676 nullptr); 2677 KMP_CHECK_SYSFAIL("pthread_create", status); 2678} 2679 2680void __kmp_hidden_helper_threads_initz_wait() { 2681 // Initial thread waits here for the completion of the initialization. The 2682 // condition variable will be notified by main thread of hidden helper teams. 2683 int status = pthread_mutex_lock(&hidden_helper_threads_initz_lock); 2684 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status); 2685 2686 if (!TCR_4(hidden_helper_initz_signaled)) { 2687 status = pthread_cond_wait(&hidden_helper_threads_initz_cond_var, 2688 &hidden_helper_threads_initz_lock); 2689 KMP_CHECK_SYSFAIL("pthread_cond_wait", status); 2690 } 2691 2692 status = pthread_mutex_unlock(&hidden_helper_threads_initz_lock); 2693 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status); 2694} 2695 2696void __kmp_hidden_helper_initz_release() { 2697 // After all initialization, reset __kmp_init_hidden_helper_threads to false. 2698 int status = pthread_mutex_lock(&hidden_helper_threads_initz_lock); 2699 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status); 2700 2701 status = pthread_cond_signal(&hidden_helper_threads_initz_cond_var); 2702 KMP_CHECK_SYSFAIL("pthread_cond_wait", status); 2703 2704 TCW_SYNC_4(hidden_helper_initz_signaled, TRUE); 2705 2706 status = pthread_mutex_unlock(&hidden_helper_threads_initz_lock); 2707 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status); 2708} 2709 2710void __kmp_hidden_helper_main_thread_wait() { 2711 // The main thread of hidden helper team will be blocked here. The 2712 // condition variable can only be signal in the destructor of RTL. 2713 int status = pthread_mutex_lock(&hidden_helper_main_thread_lock); 2714 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status); 2715 2716 if (!TCR_4(hidden_helper_main_thread_signaled)) { 2717 status = pthread_cond_wait(&hidden_helper_main_thread_cond_var, 2718 &hidden_helper_main_thread_lock); 2719 KMP_CHECK_SYSFAIL("pthread_cond_wait", status); 2720 } 2721 2722 status = pthread_mutex_unlock(&hidden_helper_main_thread_lock); 2723 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status); 2724} 2725 2726void __kmp_hidden_helper_main_thread_release() { 2727 // The initial thread of OpenMP RTL should call this function to wake up the 2728 // main thread of hidden helper team. 2729 int status = pthread_mutex_lock(&hidden_helper_main_thread_lock); 2730 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status); 2731 2732 status = pthread_cond_signal(&hidden_helper_main_thread_cond_var); 2733 KMP_CHECK_SYSFAIL("pthread_cond_signal", status); 2734 2735 // The hidden helper team is done here 2736 TCW_SYNC_4(hidden_helper_main_thread_signaled, TRUE); 2737 2738 status = pthread_mutex_unlock(&hidden_helper_main_thread_lock); 2739 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status); 2740} 2741 2742void __kmp_hidden_helper_worker_thread_signal() { 2743 int status = sem_post(&hidden_helper_task_sem); 2744 KMP_CHECK_SYSFAIL("sem_post", status); 2745} 2746 2747void __kmp_hidden_helper_threads_deinitz_wait() { 2748 // Initial thread waits here for the completion of the deinitialization. The 2749 // condition variable will be notified by main thread of hidden helper teams. 2750 int status = pthread_mutex_lock(&hidden_helper_threads_deinitz_lock); 2751 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status); 2752 2753 if (!TCR_4(hidden_helper_deinitz_signaled)) { 2754 status = pthread_cond_wait(&hidden_helper_threads_deinitz_cond_var, 2755 &hidden_helper_threads_deinitz_lock); 2756 KMP_CHECK_SYSFAIL("pthread_cond_wait", status); 2757 } 2758 2759 status = pthread_mutex_unlock(&hidden_helper_threads_deinitz_lock); 2760 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status); 2761} 2762 2763void __kmp_hidden_helper_threads_deinitz_release() { 2764 int status = pthread_mutex_lock(&hidden_helper_threads_deinitz_lock); 2765 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status); 2766 2767 status = pthread_cond_signal(&hidden_helper_threads_deinitz_cond_var); 2768 KMP_CHECK_SYSFAIL("pthread_cond_wait", status); 2769 2770 TCW_SYNC_4(hidden_helper_deinitz_signaled, TRUE); 2771 2772 status = pthread_mutex_unlock(&hidden_helper_threads_deinitz_lock); 2773 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status); 2774} 2775#else // KMP_OS_LINUX 2776void __kmp_hidden_helper_worker_thread_wait() { 2777 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS"); 2778} 2779 2780void __kmp_do_initialize_hidden_helper_threads() { 2781 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS"); 2782} 2783 2784void __kmp_hidden_helper_threads_initz_wait() { 2785 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS"); 2786} 2787 2788void __kmp_hidden_helper_initz_release() { 2789 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS"); 2790} 2791 2792void __kmp_hidden_helper_main_thread_wait() { 2793 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS"); 2794} 2795 2796void __kmp_hidden_helper_main_thread_release() { 2797 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS"); 2798} 2799 2800void __kmp_hidden_helper_worker_thread_signal() { 2801 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS"); 2802} 2803 2804void __kmp_hidden_helper_threads_deinitz_wait() { 2805 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS"); 2806} 2807 2808void __kmp_hidden_helper_threads_deinitz_release() { 2809 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS"); 2810} 2811#endif // KMP_OS_LINUX 2812 2813bool __kmp_detect_shm() { 2814 DIR *dir = opendir("/dev/shm"); 2815 if (dir) { // /dev/shm exists 2816 closedir(dir); 2817 return true; 2818 } else if (ENOENT == errno) { // /dev/shm does not exist 2819 return false; 2820 } else { // opendir() failed 2821 return false; 2822 } 2823} 2824 2825bool __kmp_detect_tmp() { 2826 DIR *dir = opendir("/tmp"); 2827 if (dir) { // /tmp exists 2828 closedir(dir); 2829 return true; 2830 } else if (ENOENT == errno) { // /tmp does not exist 2831 return false; 2832 } else { // opendir() failed 2833 return false; 2834 } 2835} 2836 2837// end of file // 2838