3102 lines · cpp
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-exception10//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_OPENBSD25#include <alloca.h>26#endif27#include <math.h> // HUGE_VAL.28#if KMP_OS_LINUX29#include <semaphore.h>30#endif // KMP_OS_LINUX31#include <sys/resource.h>32#if KMP_OS_AIX33#include <sys/ldr.h>34#include <libperfstat.h>35#elif !KMP_OS_HAIKU36#include <sys/syscall.h>37#endif38#include <sys/time.h>39#include <sys/times.h>40#include <unistd.h>41 42#if KMP_OS_LINUX43#include <sys/sysinfo.h>44#if KMP_USE_FUTEX45// We should really include <futex.h>, but that causes compatibility problems on46// different Linux* OS distributions that either require that you include (or47// break when you try to include) <pci/types.h>. Since all we need is the two48// macros below (which are part of the kernel ABI, so can't change) we just49// define the constants here and don't include <futex.h>50#ifndef FUTEX_WAIT51#define FUTEX_WAIT 052#endif53#ifndef FUTEX_WAKE54#define FUTEX_WAKE 155#endif56#endif57#elif KMP_OS_DARWIN58#include <mach/mach.h>59#include <sys/sysctl.h>60#elif KMP_OS_DRAGONFLY || KMP_OS_FREEBSD61#include <sys/types.h>62#include <sys/sysctl.h>63#include <sys/user.h>64#include <pthread_np.h>65#if KMP_OS_DRAGONFLY66#include <kvm.h>67#endif68#elif KMP_OS_NETBSD || KMP_OS_OPENBSD69#include <sys/types.h>70#include <sys/sysctl.h>71#if KMP_OS_NETBSD72#include <sched.h>73#endif74#if KMP_OS_OPENBSD75#include <pthread_np.h>76#endif77#elif KMP_OS_SOLARIS78#include <procfs.h>79#include <thread.h>80#include <sys/loadavg.h>81#endif82 83#include <ctype.h>84#include <dirent.h>85#include <fcntl.h>86 87struct kmp_sys_timer {88 struct timespec start;89};90 91#ifndef TIMEVAL_TO_TIMESPEC92// Convert timeval to timespec.93#define TIMEVAL_TO_TIMESPEC(tv, ts) \94 do { \95 (ts)->tv_sec = (tv)->tv_sec; \96 (ts)->tv_nsec = (tv)->tv_usec * 1000; \97 } while (0)98#endif99 100// Convert timespec to nanoseconds.101#define TS2NS(timespec) \102 (((timespec).tv_sec * (long int)1e9) + (timespec).tv_nsec)103 104static struct kmp_sys_timer __kmp_sys_timer_data;105 106#if KMP_HANDLE_SIGNALS107typedef void (*sig_func_t)(int);108STATIC_EFI2_WORKAROUND struct sigaction __kmp_sighldrs[NSIG];109static sigset_t __kmp_sigset;110#endif111 112static int __kmp_init_runtime = FALSE;113 114static int __kmp_fork_count = 0;115 116static pthread_condattr_t __kmp_suspend_cond_attr;117static pthread_mutexattr_t __kmp_suspend_mutex_attr;118 119static kmp_cond_align_t __kmp_wait_cv;120static kmp_mutex_align_t __kmp_wait_mx;121 122kmp_uint64 __kmp_ticks_per_msec = 1000000;123kmp_uint64 __kmp_ticks_per_usec = 1000;124 125#ifdef DEBUG_SUSPEND126static void __kmp_print_cond(char *buffer, kmp_cond_align_t *cond) {127 KMP_SNPRINTF(buffer, 128, "(cond (lock (%ld, %d)), (descr (%p)))",128 cond->c_cond.__c_lock.__status, cond->c_cond.__c_lock.__spinlock,129 cond->c_cond.__c_waiting);130}131#endif132 133#if ((KMP_OS_LINUX || KMP_OS_FREEBSD || KMP_OS_NETBSD || KMP_OS_DRAGONFLY || \134 KMP_OS_AIX) && \135 KMP_AFFINITY_SUPPORTED)136 137/* Affinity support */138 139void __kmp_affinity_bind_thread(int which) {140 KMP_ASSERT2(KMP_AFFINITY_CAPABLE(),141 "Illegal set affinity operation when not capable");142 143 kmp_affin_mask_t *mask;144 KMP_CPU_ALLOC_ON_STACK(mask);145 KMP_CPU_ZERO(mask);146 KMP_CPU_SET(which, mask);147 __kmp_set_system_affinity(mask, TRUE);148 KMP_CPU_FREE_FROM_STACK(mask);149}150 151#if KMP_OS_AIX152void __kmp_affinity_determine_capable(const char *env_var) {153 // All versions of AIX support bindprocessor().154 155 size_t mask_size = __kmp_xproc / CHAR_BIT;156 // Round up to byte boundary.157 if (__kmp_xproc % CHAR_BIT)158 ++mask_size;159 160 // Round up to the mask_size_type boundary.161 if (mask_size % sizeof(__kmp_affin_mask_size))162 mask_size += sizeof(__kmp_affin_mask_size) -163 mask_size % sizeof(__kmp_affin_mask_size);164 KMP_AFFINITY_ENABLE(mask_size);165 KA_TRACE(10,166 ("__kmp_affinity_determine_capable: "167 "AIX OS affinity interface bindprocessor functional (mask size = "168 "%" KMP_SIZE_T_SPEC ").\n",169 __kmp_affin_mask_size));170}171 172#else // !KMP_OS_AIX173 174/* Determine if we can access affinity functionality on this version of175 * Linux* OS by checking __NR_sched_{get,set}affinity system calls, and set176 * __kmp_affin_mask_size to the appropriate value (0 means not capable). */177void __kmp_affinity_determine_capable(const char *env_var) {178 // Check and see if the OS supports thread affinity.179 180#if KMP_OS_LINUX181#define KMP_CPU_SET_SIZE_LIMIT (1024 * 1024)182#define KMP_CPU_SET_TRY_SIZE CACHE_LINE183#elif KMP_OS_FREEBSD || KMP_OS_DRAGONFLY184#define KMP_CPU_SET_SIZE_LIMIT (sizeof(cpuset_t))185#elif KMP_OS_NETBSD186#define KMP_CPU_SET_SIZE_LIMIT (256)187#endif188 189 int verbose = __kmp_affinity.flags.verbose;190 int warnings = __kmp_affinity.flags.warnings;191 enum affinity_type type = __kmp_affinity.type;192 193#if KMP_OS_LINUX194 long gCode;195 unsigned char *buf;196 buf = (unsigned char *)KMP_INTERNAL_MALLOC(KMP_CPU_SET_SIZE_LIMIT);197 198 // If the syscall returns a suggestion for the size,199 // then we don't have to search for an appropriate size.200 gCode = syscall(__NR_sched_getaffinity, 0, KMP_CPU_SET_TRY_SIZE, buf);201 KA_TRACE(30, ("__kmp_affinity_determine_capable: "202 "initial getaffinity call returned %ld errno = %d\n",203 gCode, errno));204 205 if (gCode < 0 && errno != EINVAL) {206 // System call not supported207 if (verbose ||208 (warnings && (type != affinity_none) && (type != affinity_default) &&209 (type != affinity_disabled))) {210 int error = errno;211 kmp_msg_t err_code = KMP_ERR(error);212 __kmp_msg(kmp_ms_warning, KMP_MSG(GetAffSysCallNotSupported, env_var),213 err_code, __kmp_msg_null);214 if (__kmp_generate_warnings == kmp_warnings_off) {215 __kmp_str_free(&err_code.str);216 }217 }218 KMP_AFFINITY_DISABLE();219 KMP_INTERNAL_FREE(buf);220 return;221 } else if (gCode > 0) {222 // The optimal situation: the OS returns the size of the buffer it expects.223 KMP_AFFINITY_ENABLE(gCode);224 KA_TRACE(10, ("__kmp_affinity_determine_capable: "225 "affinity supported (mask size %d)\n",226 (int)__kmp_affin_mask_size));227 KMP_INTERNAL_FREE(buf);228 return;229 }230 231 // Call the getaffinity system call repeatedly with increasing set sizes232 // until we succeed, or reach an upper bound on the search.233 KA_TRACE(30, ("__kmp_affinity_determine_capable: "234 "searching for proper set size\n"));235 int size;236 for (size = 1; size <= KMP_CPU_SET_SIZE_LIMIT; size *= 2) {237 gCode = syscall(__NR_sched_getaffinity, 0, size, buf);238 KA_TRACE(30, ("__kmp_affinity_determine_capable: "239 "getaffinity for mask size %ld returned %ld errno = %d\n",240 size, gCode, errno));241 242 if (gCode < 0) {243 if (errno == ENOSYS) {244 // We shouldn't get here245 KA_TRACE(30, ("__kmp_affinity_determine_capable: "246 "inconsistent OS call behavior: errno == ENOSYS for mask "247 "size %d\n",248 size));249 if (verbose ||250 (warnings && (type != affinity_none) &&251 (type != affinity_default) && (type != affinity_disabled))) {252 int error = errno;253 kmp_msg_t err_code = KMP_ERR(error);254 __kmp_msg(kmp_ms_warning, KMP_MSG(GetAffSysCallNotSupported, env_var),255 err_code, __kmp_msg_null);256 if (__kmp_generate_warnings == kmp_warnings_off) {257 __kmp_str_free(&err_code.str);258 }259 }260 KMP_AFFINITY_DISABLE();261 KMP_INTERNAL_FREE(buf);262 return;263 }264 continue;265 }266 267 KMP_AFFINITY_ENABLE(gCode);268 KA_TRACE(10, ("__kmp_affinity_determine_capable: "269 "affinity supported (mask size %d)\n",270 (int)__kmp_affin_mask_size));271 KMP_INTERNAL_FREE(buf);272 return;273 }274#elif KMP_OS_FREEBSD || KMP_OS_NETBSD || KMP_OS_DRAGONFLY275 long gCode;276 unsigned char *buf;277 buf = (unsigned char *)KMP_INTERNAL_MALLOC(KMP_CPU_SET_SIZE_LIMIT);278 gCode = pthread_getaffinity_np(pthread_self(), KMP_CPU_SET_SIZE_LIMIT,279 reinterpret_cast<cpuset_t *>(buf));280 KA_TRACE(30, ("__kmp_affinity_determine_capable: "281 "initial getaffinity call returned %d errno = %d\n",282 gCode, errno));283 if (gCode == 0) {284 KMP_AFFINITY_ENABLE(KMP_CPU_SET_SIZE_LIMIT);285 KA_TRACE(10, ("__kmp_affinity_determine_capable: "286 "affinity supported (mask size %d)\n",287 (int)__kmp_affin_mask_size));288 KMP_INTERNAL_FREE(buf);289 return;290 }291#endif292 KMP_INTERNAL_FREE(buf);293 294 // Affinity is not supported295 KMP_AFFINITY_DISABLE();296 KA_TRACE(10, ("__kmp_affinity_determine_capable: "297 "cannot determine mask size - affinity not supported\n"));298 if (verbose || (warnings && (type != affinity_none) &&299 (type != affinity_default) && (type != affinity_disabled))) {300 KMP_WARNING(AffCantGetMaskSize, env_var);301 }302}303#endif // KMP_OS_AIX304#endif // (KMP_OS_LINUX || KMP_OS_FREEBSD || KMP_OS_NETBSD || \305 KMP_OS_DRAGONFLY || KMP_OS_AIX) && KMP_AFFINITY_SUPPORTED306 307#if KMP_USE_FUTEX308 309int __kmp_futex_determine_capable() {310 int loc = 0;311 long rc = syscall(__NR_futex, &loc, FUTEX_WAKE, 1, NULL, NULL, 0);312 int retval = (rc == 0) || (errno != ENOSYS);313 314 KA_TRACE(10,315 ("__kmp_futex_determine_capable: rc = %d errno = %d\n", rc, errno));316 KA_TRACE(10, ("__kmp_futex_determine_capable: futex syscall%s supported\n",317 retval ? "" : " not"));318 319 return retval;320}321 322#endif // KMP_USE_FUTEX323 324#if (KMP_ARCH_X86 || KMP_ARCH_X86_64 || KMP_ARCH_WASM) && (!KMP_ASM_INTRINS)325/* Only 32-bit "add-exchange" instruction on IA-32 architecture causes us to326 use compare_and_store for these routines */327 328kmp_int8 __kmp_test_then_or8(volatile kmp_int8 *p, kmp_int8 d) {329 kmp_int8 old_value, new_value;330 331 old_value = TCR_1(*p);332 new_value = old_value | d;333 334 while (!KMP_COMPARE_AND_STORE_REL8(p, old_value, new_value)) {335 KMP_CPU_PAUSE();336 old_value = TCR_1(*p);337 new_value = old_value | d;338 }339 return old_value;340}341 342kmp_int8 __kmp_test_then_and8(volatile kmp_int8 *p, kmp_int8 d) {343 kmp_int8 old_value, new_value;344 345 old_value = TCR_1(*p);346 new_value = old_value & d;347 348 while (!KMP_COMPARE_AND_STORE_REL8(p, old_value, new_value)) {349 KMP_CPU_PAUSE();350 old_value = TCR_1(*p);351 new_value = old_value & d;352 }353 return old_value;354}355 356kmp_uint32 __kmp_test_then_or32(volatile kmp_uint32 *p, kmp_uint32 d) {357 kmp_uint32 old_value, new_value;358 359 old_value = TCR_4(*p);360 new_value = old_value | d;361 362 while (!KMP_COMPARE_AND_STORE_REL32(p, old_value, new_value)) {363 KMP_CPU_PAUSE();364 old_value = TCR_4(*p);365 new_value = old_value | d;366 }367 return old_value;368}369 370kmp_uint32 __kmp_test_then_and32(volatile kmp_uint32 *p, kmp_uint32 d) {371 kmp_uint32 old_value, new_value;372 373 old_value = TCR_4(*p);374 new_value = old_value & d;375 376 while (!KMP_COMPARE_AND_STORE_REL32(p, old_value, new_value)) {377 KMP_CPU_PAUSE();378 old_value = TCR_4(*p);379 new_value = old_value & d;380 }381 return old_value;382}383 384#if KMP_ARCH_X86 || KMP_ARCH_WASM385kmp_int8 __kmp_test_then_add8(volatile kmp_int8 *p, kmp_int8 d) {386 kmp_int8 old_value, new_value;387 388 old_value = TCR_1(*p);389 new_value = old_value + d;390 391 while (!KMP_COMPARE_AND_STORE_REL8(p, old_value, new_value)) {392 KMP_CPU_PAUSE();393 old_value = TCR_1(*p);394 new_value = old_value + d;395 }396 return old_value;397}398 399kmp_int64 __kmp_test_then_add64(volatile kmp_int64 *p, kmp_int64 d) {400 kmp_int64 old_value, new_value;401 402 old_value = TCR_8(*p);403 new_value = old_value + d;404 405 while (!KMP_COMPARE_AND_STORE_REL64(p, old_value, new_value)) {406 KMP_CPU_PAUSE();407 old_value = TCR_8(*p);408 new_value = old_value + d;409 }410 return old_value;411}412#endif /* KMP_ARCH_X86 */413 414kmp_uint64 __kmp_test_then_or64(volatile kmp_uint64 *p, kmp_uint64 d) {415 kmp_uint64 old_value, new_value;416 417 old_value = TCR_8(*p);418 new_value = old_value | d;419 while (!KMP_COMPARE_AND_STORE_REL64(p, old_value, new_value)) {420 KMP_CPU_PAUSE();421 old_value = TCR_8(*p);422 new_value = old_value | d;423 }424 return old_value;425}426 427kmp_uint64 __kmp_test_then_and64(volatile kmp_uint64 *p, kmp_uint64 d) {428 kmp_uint64 old_value, new_value;429 430 old_value = TCR_8(*p);431 new_value = old_value & d;432 while (!KMP_COMPARE_AND_STORE_REL64(p, old_value, new_value)) {433 KMP_CPU_PAUSE();434 old_value = TCR_8(*p);435 new_value = old_value & d;436 }437 return old_value;438}439 440#endif /* (KMP_ARCH_X86 || KMP_ARCH_X86_64) && (! KMP_ASM_INTRINS) */441 442void __kmp_terminate_thread(int gtid) {443 int status;444 kmp_info_t *th = __kmp_threads[gtid];445 446 if (!th)447 return;448 449#ifdef KMP_CANCEL_THREADS450 KA_TRACE(10, ("__kmp_terminate_thread: kill (%d)\n", gtid));451 status = pthread_cancel(th->th.th_info.ds.ds_thread);452 if (status != 0 && status != ESRCH) {453 __kmp_fatal(KMP_MSG(CantTerminateWorkerThread), KMP_ERR(status),454 __kmp_msg_null);455 }456#endif457 KMP_YIELD(TRUE);458} //459 460/* Set thread stack info.461 If values are unreasonable, assume call failed and use incremental stack462 refinement method instead. Returns TRUE if the stack parameters could be463 determined exactly, FALSE if incremental refinement is necessary. */464static kmp_int32 __kmp_set_stack_info(int gtid, kmp_info_t *th) {465 int stack_data;466#if KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD || \467 KMP_OS_HAIKU || KMP_OS_HURD || KMP_OS_SOLARIS || KMP_OS_AIX468 int status;469 size_t size = 0;470 void *addr = 0;471 472 /* Always do incremental stack refinement for ubermaster threads since the473 initial thread stack range can be reduced by sibling thread creation so474 pthread_attr_getstack may cause thread gtid aliasing */475 if (!KMP_UBER_GTID(gtid)) {476 477#if KMP_OS_SOLARIS478 stack_t s;479 if ((status = thr_stksegment(&s)) < 0) {480 KMP_CHECK_SYSFAIL("thr_stksegment", status);481 }482 483 addr = s.ss_sp;484 size = s.ss_size;485 KA_TRACE(60, ("__kmp_set_stack_info: T#%d thr_stksegment returned size:"486 " %lu, low addr: %p\n",487 gtid, size, addr));488#else489 pthread_attr_t attr;490 /* Fetch the real thread attributes */491 status = pthread_attr_init(&attr);492 KMP_CHECK_SYSFAIL("pthread_attr_init", status);493#if KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD494 status = pthread_attr_get_np(pthread_self(), &attr);495 KMP_CHECK_SYSFAIL("pthread_attr_get_np", status);496#else497 status = pthread_getattr_np(pthread_self(), &attr);498 KMP_CHECK_SYSFAIL("pthread_getattr_np", status);499#endif500 status = pthread_attr_getstack(&attr, &addr, &size);501 KMP_CHECK_SYSFAIL("pthread_attr_getstack", status);502 KA_TRACE(60,503 ("__kmp_set_stack_info: T#%d pthread_attr_getstack returned size:"504 " %lu, low addr: %p\n",505 gtid, size, addr));506 status = pthread_attr_destroy(&attr);507 KMP_CHECK_SYSFAIL("pthread_attr_destroy", status);508#endif509 }510 511 if (size != 0 && addr != 0) { // was stack parameter determination successful?512 /* Store the correct base and size */513 TCW_PTR(th->th.th_info.ds.ds_stackbase, (((char *)addr) + size));514 TCW_PTR(th->th.th_info.ds.ds_stacksize, size);515 TCW_4(th->th.th_info.ds.ds_stackgrow, FALSE);516 return TRUE;517 }518#endif /* KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD \519 || KMP_OS_HAIKU || KMP_OS_HURD || KMP_OS_SOLARIS */520 /* Use incremental refinement starting from initial conservative estimate */521 TCW_PTR(th->th.th_info.ds.ds_stacksize, 0);522 TCW_PTR(th->th.th_info.ds.ds_stackbase, &stack_data);523 TCW_4(th->th.th_info.ds.ds_stackgrow, TRUE);524 return FALSE;525}526 527static void *__kmp_launch_worker(void *thr) {528 int status, old_type, old_state;529#ifdef KMP_BLOCK_SIGNALS530 sigset_t new_set, old_set;531#endif /* KMP_BLOCK_SIGNALS */532 void *exit_val;533#if KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD || \534 KMP_OS_OPENBSD || KMP_OS_HAIKU || KMP_OS_HURD || KMP_OS_SOLARIS || \535 KMP_OS_AIX536 void *volatile padding = 0;537#endif538 int gtid;539 540 gtid = ((kmp_info_t *)thr)->th.th_info.ds.ds_gtid;541 __kmp_gtid_set_specific(gtid);542#ifdef KMP_TDATA_GTID543 __kmp_gtid = gtid;544#endif545#if KMP_STATS_ENABLED546 // set thread local index to point to thread-specific stats547 __kmp_stats_thread_ptr = ((kmp_info_t *)thr)->th.th_stats;548 __kmp_stats_thread_ptr->startLife();549 KMP_SET_THREAD_STATE(IDLE);550 KMP_INIT_PARTITIONED_TIMERS(OMP_idle);551#endif552 553#if USE_ITT_BUILD554 __kmp_itt_thread_name(gtid);555#endif /* USE_ITT_BUILD */556 557#if KMP_AFFINITY_SUPPORTED558 __kmp_affinity_bind_init_mask(gtid);559#endif560 561#ifdef KMP_CANCEL_THREADS562 status = pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &old_type);563 KMP_CHECK_SYSFAIL("pthread_setcanceltype", status);564 // josh todo: isn't PTHREAD_CANCEL_ENABLE default for newly-created threads?565 status = pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_state);566 KMP_CHECK_SYSFAIL("pthread_setcancelstate", status);567#endif568 569#if KMP_ARCH_X86 || KMP_ARCH_X86_64570 // Set FP control regs to be a copy of the parallel initialization thread's.571 __kmp_clear_x87_fpu_status_word();572 __kmp_load_x87_fpu_control_word(&__kmp_init_x87_fpu_control_word);573 __kmp_load_mxcsr(&__kmp_init_mxcsr);574#endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */575 576#ifdef KMP_BLOCK_SIGNALS577 status = sigfillset(&new_set);578 KMP_CHECK_SYSFAIL_ERRNO("sigfillset", status);579 status = pthread_sigmask(SIG_BLOCK, &new_set, &old_set);580 KMP_CHECK_SYSFAIL("pthread_sigmask", status);581#endif /* KMP_BLOCK_SIGNALS */582 583#if KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD || \584 KMP_OS_OPENBSD || KMP_OS_HAIKU || KMP_OS_HURD || KMP_OS_SOLARIS || \585 KMP_OS_AIX586 if (__kmp_stkoffset > 0 && gtid > 0) {587 padding = KMP_ALLOCA(gtid * __kmp_stkoffset);588 (void)padding;589 }590#endif591 592 KMP_MB();593 __kmp_set_stack_info(gtid, (kmp_info_t *)thr);594 595 __kmp_check_stack_overlap((kmp_info_t *)thr);596 597 exit_val = __kmp_launch_thread((kmp_info_t *)thr);598 599#ifdef KMP_BLOCK_SIGNALS600 status = pthread_sigmask(SIG_SETMASK, &old_set, NULL);601 KMP_CHECK_SYSFAIL("pthread_sigmask", status);602#endif /* KMP_BLOCK_SIGNALS */603 604 return exit_val;605}606 607#if KMP_USE_MONITOR608/* The monitor thread controls all of the threads in the complex */609 610static void *__kmp_launch_monitor(void *thr) {611 int status, old_type, old_state;612#ifdef KMP_BLOCK_SIGNALS613 sigset_t new_set;614#endif /* KMP_BLOCK_SIGNALS */615 struct timespec interval;616 617 KMP_MB(); /* Flush all pending memory write invalidates. */618 619 KA_TRACE(10, ("__kmp_launch_monitor: #1 launched\n"));620 621 /* register us as the monitor thread */622 __kmp_gtid_set_specific(KMP_GTID_MONITOR);623#ifdef KMP_TDATA_GTID624 __kmp_gtid = KMP_GTID_MONITOR;625#endif626 627 KMP_MB();628 629#if USE_ITT_BUILD630 // Instruct Intel(R) Threading Tools to ignore monitor thread.631 __kmp_itt_thread_ignore();632#endif /* USE_ITT_BUILD */633 634 __kmp_set_stack_info(((kmp_info_t *)thr)->th.th_info.ds.ds_gtid,635 (kmp_info_t *)thr);636 637 __kmp_check_stack_overlap((kmp_info_t *)thr);638 639#ifdef KMP_CANCEL_THREADS640 status = pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &old_type);641 KMP_CHECK_SYSFAIL("pthread_setcanceltype", status);642 // josh todo: isn't PTHREAD_CANCEL_ENABLE default for newly-created threads?643 status = pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_state);644 KMP_CHECK_SYSFAIL("pthread_setcancelstate", status);645#endif646 647#if KMP_REAL_TIME_FIX648 // This is a potential fix which allows application with real-time scheduling649 // policy work. However, decision about the fix is not made yet, so it is650 // disabled by default.651 { // Are program started with real-time scheduling policy?652 int sched = sched_getscheduler(0);653 if (sched == SCHED_FIFO || sched == SCHED_RR) {654 // Yes, we are a part of real-time application. Try to increase the655 // priority of the monitor.656 struct sched_param param;657 int max_priority = sched_get_priority_max(sched);658 int rc;659 KMP_WARNING(RealTimeSchedNotSupported);660 sched_getparam(0, ¶m);661 if (param.sched_priority < max_priority) {662 param.sched_priority += 1;663 rc = sched_setscheduler(0, sched, ¶m);664 if (rc != 0) {665 int error = errno;666 kmp_msg_t err_code = KMP_ERR(error);667 __kmp_msg(kmp_ms_warning, KMP_MSG(CantChangeMonitorPriority),668 err_code, KMP_MSG(MonitorWillStarve), __kmp_msg_null);669 if (__kmp_generate_warnings == kmp_warnings_off) {670 __kmp_str_free(&err_code.str);671 }672 }673 } else {674 // We cannot abort here, because number of CPUs may be enough for all675 // the threads, including the monitor thread, so application could676 // potentially work...677 __kmp_msg(kmp_ms_warning, KMP_MSG(RunningAtMaxPriority),678 KMP_MSG(MonitorWillStarve), KMP_HNT(RunningAtMaxPriority),679 __kmp_msg_null);680 }681 }682 // AC: free thread that waits for monitor started683 TCW_4(__kmp_global.g.g_time.dt.t_value, 0);684 }685#endif // KMP_REAL_TIME_FIX686 687 KMP_MB(); /* Flush all pending memory write invalidates. */688 689 if (__kmp_monitor_wakeups == 1) {690 interval.tv_sec = 1;691 interval.tv_nsec = 0;692 } else {693 interval.tv_sec = 0;694 interval.tv_nsec = (KMP_NSEC_PER_SEC / __kmp_monitor_wakeups);695 }696 697 KA_TRACE(10, ("__kmp_launch_monitor: #2 monitor\n"));698 699 while (!TCR_4(__kmp_global.g.g_done)) {700 struct timespec now;701 struct timeval tval;702 703 /* This thread monitors the state of the system */704 705 KA_TRACE(15, ("__kmp_launch_monitor: update\n"));706 707 status = gettimeofday(&tval, NULL);708 KMP_CHECK_SYSFAIL_ERRNO("gettimeofday", status);709 TIMEVAL_TO_TIMESPEC(&tval, &now);710 711 now.tv_sec += interval.tv_sec;712 now.tv_nsec += interval.tv_nsec;713 714 if (now.tv_nsec >= KMP_NSEC_PER_SEC) {715 now.tv_sec += 1;716 now.tv_nsec -= KMP_NSEC_PER_SEC;717 }718 719 status = pthread_mutex_lock(&__kmp_wait_mx.m_mutex);720 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status);721 // AC: the monitor should not fall asleep if g_done has been set722 if (!TCR_4(__kmp_global.g.g_done)) { // check once more under mutex723 status = pthread_cond_timedwait(&__kmp_wait_cv.c_cond,724 &__kmp_wait_mx.m_mutex, &now);725 if (status != 0) {726 if (status != ETIMEDOUT && status != EINTR) {727 KMP_SYSFAIL("pthread_cond_timedwait", status);728 }729 }730 }731 status = pthread_mutex_unlock(&__kmp_wait_mx.m_mutex);732 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status);733 734 TCW_4(__kmp_global.g.g_time.dt.t_value,735 TCR_4(__kmp_global.g.g_time.dt.t_value) + 1);736 737 KMP_MB(); /* Flush all pending memory write invalidates. */738 }739 740 KA_TRACE(10, ("__kmp_launch_monitor: #3 cleanup\n"));741 742#ifdef KMP_BLOCK_SIGNALS743 status = sigfillset(&new_set);744 KMP_CHECK_SYSFAIL_ERRNO("sigfillset", status);745 status = pthread_sigmask(SIG_UNBLOCK, &new_set, NULL);746 KMP_CHECK_SYSFAIL("pthread_sigmask", status);747#endif /* KMP_BLOCK_SIGNALS */748 749 KA_TRACE(10, ("__kmp_launch_monitor: #4 finished\n"));750 751 if (__kmp_global.g.g_abort != 0) {752 /* now we need to terminate the worker threads */753 /* the value of t_abort is the signal we caught */754 755 int gtid;756 757 KA_TRACE(10, ("__kmp_launch_monitor: #5 terminate sig=%d\n",758 __kmp_global.g.g_abort));759 760 /* terminate the OpenMP worker threads */761 /* TODO this is not valid for sibling threads!!762 * the uber master might not be 0 anymore.. */763 for (gtid = 1; gtid < __kmp_threads_capacity; ++gtid)764 __kmp_terminate_thread(gtid);765 766 __kmp_cleanup();767 768 KA_TRACE(10, ("__kmp_launch_monitor: #6 raise sig=%d\n",769 __kmp_global.g.g_abort));770 771 if (__kmp_global.g.g_abort > 0)772 raise(__kmp_global.g.g_abort);773 }774 775 KA_TRACE(10, ("__kmp_launch_monitor: #7 exit\n"));776 777 return thr;778}779#endif // KMP_USE_MONITOR780 781void __kmp_create_worker(int gtid, kmp_info_t *th, size_t stack_size) {782 pthread_t handle;783 pthread_attr_t thread_attr;784 int status;785 786 th->th.th_info.ds.ds_gtid = gtid;787 788#if KMP_STATS_ENABLED789 // sets up worker thread stats790 __kmp_acquire_tas_lock(&__kmp_stats_lock, gtid);791 792 // th->th.th_stats is used to transfer thread-specific stats-pointer to793 // __kmp_launch_worker. So when thread is created (goes into794 // __kmp_launch_worker) it will set its thread local pointer to795 // th->th.th_stats796 if (!KMP_UBER_GTID(gtid)) {797 th->th.th_stats = __kmp_stats_list->push_back(gtid);798 } else {799 // For root threads, __kmp_stats_thread_ptr is set in __kmp_register_root(),800 // so set the th->th.th_stats field to it.801 th->th.th_stats = __kmp_stats_thread_ptr;802 }803 __kmp_release_tas_lock(&__kmp_stats_lock, gtid);804 805#endif // KMP_STATS_ENABLED806 807 if (KMP_UBER_GTID(gtid)) {808 KA_TRACE(10, ("__kmp_create_worker: uber thread (%d)\n", gtid));809 th->th.th_info.ds.ds_thread = pthread_self();810 __kmp_set_stack_info(gtid, th);811 __kmp_check_stack_overlap(th);812 return;813 }814 815 KA_TRACE(10, ("__kmp_create_worker: try to create thread (%d)\n", gtid));816 817 KMP_MB(); /* Flush all pending memory write invalidates. */818 819#ifdef KMP_THREAD_ATTR820 status = pthread_attr_init(&thread_attr);821 if (status != 0) {822 __kmp_fatal(KMP_MSG(CantInitThreadAttrs), KMP_ERR(status), __kmp_msg_null);823 }824 status = pthread_attr_setdetachstate(&thread_attr, PTHREAD_CREATE_JOINABLE);825 if (status != 0) {826 __kmp_fatal(KMP_MSG(CantSetWorkerState), KMP_ERR(status), __kmp_msg_null);827 }828 829 /* Set stack size for this thread now.830 The multiple of 2 is there because on some machines, requesting an unusual831 stacksize causes the thread to have an offset before the dummy alloca()832 takes place to create the offset. Since we want the user to have a833 sufficient stacksize AND support a stack offset, we alloca() twice the834 offset so that the upcoming alloca() does not eliminate any premade offset,835 and also gives the user the stack space they requested for all threads */836 stack_size += gtid * __kmp_stkoffset * 2;837 838 KA_TRACE(10, ("__kmp_create_worker: T#%d, default stacksize = %lu bytes, "839 "__kmp_stksize = %lu bytes, final stacksize = %lu bytes\n",840 gtid, KMP_DEFAULT_STKSIZE, __kmp_stksize, stack_size));841 842#ifdef _POSIX_THREAD_ATTR_STACKSIZE843 status = pthread_attr_setstacksize(&thread_attr, stack_size);844#ifdef KMP_BACKUP_STKSIZE845 if (status != 0) {846 if (!__kmp_env_stksize) {847 stack_size = KMP_BACKUP_STKSIZE + gtid * __kmp_stkoffset;848 __kmp_stksize = KMP_BACKUP_STKSIZE;849 KA_TRACE(10, ("__kmp_create_worker: T#%d, default stacksize = %lu bytes, "850 "__kmp_stksize = %lu bytes, (backup) final stacksize = %lu "851 "bytes\n",852 gtid, KMP_DEFAULT_STKSIZE, __kmp_stksize, stack_size));853 status = pthread_attr_setstacksize(&thread_attr, stack_size);854 }855 }856#endif /* KMP_BACKUP_STKSIZE */857 if (status != 0) {858 __kmp_fatal(KMP_MSG(CantSetWorkerStackSize, stack_size), KMP_ERR(status),859 KMP_HNT(ChangeWorkerStackSize), __kmp_msg_null);860 }861#endif /* _POSIX_THREAD_ATTR_STACKSIZE */862 863#endif /* KMP_THREAD_ATTR */864 865 status =866 pthread_create(&handle, &thread_attr, __kmp_launch_worker, (void *)th);867 if (status != 0 || !handle) { // ??? Why do we check handle??868#ifdef _POSIX_THREAD_ATTR_STACKSIZE869 if (status == EINVAL) {870 __kmp_fatal(KMP_MSG(CantSetWorkerStackSize, stack_size), KMP_ERR(status),871 KMP_HNT(IncreaseWorkerStackSize), __kmp_msg_null);872 }873 if (status == ENOMEM) {874 __kmp_fatal(KMP_MSG(CantSetWorkerStackSize, stack_size), KMP_ERR(status),875 KMP_HNT(DecreaseWorkerStackSize), __kmp_msg_null);876 }877#endif /* _POSIX_THREAD_ATTR_STACKSIZE */878 if (status == EAGAIN) {879 __kmp_fatal(KMP_MSG(NoResourcesForWorkerThread), KMP_ERR(status),880 KMP_HNT(Decrease_NUM_THREADS), __kmp_msg_null);881 }882 KMP_SYSFAIL("pthread_create", status);883 }884 885 // Rename worker threads for improved debuggability886 if (!KMP_UBER_GTID(gtid)) {887#if defined(LIBOMP_HAVE_PTHREAD_SET_NAME_NP)888 pthread_set_name_np(handle, "openmp_worker");889#elif defined(LIBOMP_HAVE_PTHREAD_SETNAME_NP) && !KMP_OS_DARWIN890#if KMP_OS_NETBSD891 pthread_setname_np(handle, "%s", const_cast<char *>("openmp_worker"));892#else893 pthread_setname_np(handle, "openmp_worker");894#endif895#endif896 }897 898 th->th.th_info.ds.ds_thread = handle;899 900#ifdef KMP_THREAD_ATTR901 status = pthread_attr_destroy(&thread_attr);902 if (status) {903 kmp_msg_t err_code = KMP_ERR(status);904 __kmp_msg(kmp_ms_warning, KMP_MSG(CantDestroyThreadAttrs), err_code,905 __kmp_msg_null);906 if (__kmp_generate_warnings == kmp_warnings_off) {907 __kmp_str_free(&err_code.str);908 }909 }910#endif /* KMP_THREAD_ATTR */911 912 KMP_MB(); /* Flush all pending memory write invalidates. */913 914 KA_TRACE(10, ("__kmp_create_worker: done creating thread (%d)\n", gtid));915 916} // __kmp_create_worker917 918#if KMP_USE_MONITOR919void __kmp_create_monitor(kmp_info_t *th) {920 pthread_t handle;921 pthread_attr_t thread_attr;922 size_t size;923 int status;924 int auto_adj_size = FALSE;925 926 if (__kmp_dflt_blocktime == KMP_MAX_BLOCKTIME) {927 // We don't need monitor thread in case of MAX_BLOCKTIME928 KA_TRACE(10, ("__kmp_create_monitor: skipping monitor thread because of "929 "MAX blocktime\n"));930 th->th.th_info.ds.ds_tid = 0; // this makes reap_monitor no-op931 th->th.th_info.ds.ds_gtid = 0;932 return;933 }934 KA_TRACE(10, ("__kmp_create_monitor: try to create monitor\n"));935 936 KMP_MB(); /* Flush all pending memory write invalidates. */937 938 th->th.th_info.ds.ds_tid = KMP_GTID_MONITOR;939 th->th.th_info.ds.ds_gtid = KMP_GTID_MONITOR;940#if KMP_REAL_TIME_FIX941 TCW_4(__kmp_global.g.g_time.dt.t_value,942 -1); // Will use it for synchronization a bit later.943#else944 TCW_4(__kmp_global.g.g_time.dt.t_value, 0);945#endif // KMP_REAL_TIME_FIX946 947#ifdef KMP_THREAD_ATTR948 if (__kmp_monitor_stksize == 0) {949 __kmp_monitor_stksize = KMP_DEFAULT_MONITOR_STKSIZE;950 auto_adj_size = TRUE;951 }952 status = pthread_attr_init(&thread_attr);953 if (status != 0) {954 __kmp_fatal(KMP_MSG(CantInitThreadAttrs), KMP_ERR(status), __kmp_msg_null);955 }956 status = pthread_attr_setdetachstate(&thread_attr, PTHREAD_CREATE_JOINABLE);957 if (status != 0) {958 __kmp_fatal(KMP_MSG(CantSetMonitorState), KMP_ERR(status), __kmp_msg_null);959 }960 961#ifdef _POSIX_THREAD_ATTR_STACKSIZE962 status = pthread_attr_getstacksize(&thread_attr, &size);963 KMP_CHECK_SYSFAIL("pthread_attr_getstacksize", status);964#else965 size = __kmp_sys_min_stksize;966#endif /* _POSIX_THREAD_ATTR_STACKSIZE */967#endif /* KMP_THREAD_ATTR */968 969 if (__kmp_monitor_stksize == 0) {970 __kmp_monitor_stksize = KMP_DEFAULT_MONITOR_STKSIZE;971 }972 if (__kmp_monitor_stksize < __kmp_sys_min_stksize) {973 __kmp_monitor_stksize = __kmp_sys_min_stksize;974 }975 976 KA_TRACE(10, ("__kmp_create_monitor: default stacksize = %lu bytes,"977 "requested stacksize = %lu bytes\n",978 size, __kmp_monitor_stksize));979 980retry:981 982/* Set stack size for this thread now. */983#ifdef _POSIX_THREAD_ATTR_STACKSIZE984 KA_TRACE(10, ("__kmp_create_monitor: setting stacksize = %lu bytes,",985 __kmp_monitor_stksize));986 status = pthread_attr_setstacksize(&thread_attr, __kmp_monitor_stksize);987 if (status != 0) {988 if (auto_adj_size) {989 __kmp_monitor_stksize *= 2;990 goto retry;991 }992 kmp_msg_t err_code = KMP_ERR(status);993 __kmp_msg(kmp_ms_warning, // should this be fatal? BB994 KMP_MSG(CantSetMonitorStackSize, (long int)__kmp_monitor_stksize),995 err_code, KMP_HNT(ChangeMonitorStackSize), __kmp_msg_null);996 if (__kmp_generate_warnings == kmp_warnings_off) {997 __kmp_str_free(&err_code.str);998 }999 }1000#endif /* _POSIX_THREAD_ATTR_STACKSIZE */1001 1002 status =1003 pthread_create(&handle, &thread_attr, __kmp_launch_monitor, (void *)th);1004 1005 if (status != 0) {1006#ifdef _POSIX_THREAD_ATTR_STACKSIZE1007 if (status == EINVAL) {1008 if (auto_adj_size && (__kmp_monitor_stksize < (size_t)0x40000000)) {1009 __kmp_monitor_stksize *= 2;1010 goto retry;1011 }1012 __kmp_fatal(KMP_MSG(CantSetMonitorStackSize, __kmp_monitor_stksize),1013 KMP_ERR(status), KMP_HNT(IncreaseMonitorStackSize),1014 __kmp_msg_null);1015 }1016 if (status == ENOMEM) {1017 __kmp_fatal(KMP_MSG(CantSetMonitorStackSize, __kmp_monitor_stksize),1018 KMP_ERR(status), KMP_HNT(DecreaseMonitorStackSize),1019 __kmp_msg_null);1020 }1021#endif /* _POSIX_THREAD_ATTR_STACKSIZE */1022 if (status == EAGAIN) {1023 __kmp_fatal(KMP_MSG(NoResourcesForMonitorThread), KMP_ERR(status),1024 KMP_HNT(DecreaseNumberOfThreadsInUse), __kmp_msg_null);1025 }1026 KMP_SYSFAIL("pthread_create", status);1027 }1028 1029 th->th.th_info.ds.ds_thread = handle;1030 1031#if KMP_REAL_TIME_FIX1032 // Wait for the monitor thread is really started and set its *priority*.1033 KMP_DEBUG_ASSERT(sizeof(kmp_uint32) ==1034 sizeof(__kmp_global.g.g_time.dt.t_value));1035 __kmp_wait_4((kmp_uint32 volatile *)&__kmp_global.g.g_time.dt.t_value, -1,1036 &__kmp_neq_4, NULL);1037#endif // KMP_REAL_TIME_FIX1038 1039#ifdef KMP_THREAD_ATTR1040 status = pthread_attr_destroy(&thread_attr);1041 if (status != 0) {1042 kmp_msg_t err_code = KMP_ERR(status);1043 __kmp_msg(kmp_ms_warning, KMP_MSG(CantDestroyThreadAttrs), err_code,1044 __kmp_msg_null);1045 if (__kmp_generate_warnings == kmp_warnings_off) {1046 __kmp_str_free(&err_code.str);1047 }1048 }1049#endif1050 1051 KMP_MB(); /* Flush all pending memory write invalidates. */1052 1053 KA_TRACE(10, ("__kmp_create_monitor: monitor created %#.8lx\n",1054 th->th.th_info.ds.ds_thread));1055 1056} // __kmp_create_monitor1057#endif // KMP_USE_MONITOR1058 1059void __kmp_exit_thread(int exit_status) {1060#if KMP_OS_WASI1061// TODO: the wasm32-wasi-threads target does not yet support pthread_exit.1062#else1063 pthread_exit((void *)(intptr_t)exit_status);1064#endif1065} // __kmp_exit_thread1066 1067#if KMP_USE_MONITOR1068void __kmp_resume_monitor();1069 1070extern "C" void __kmp_reap_monitor(kmp_info_t *th) {1071 int status;1072 void *exit_val;1073 1074 KA_TRACE(10, ("__kmp_reap_monitor: try to reap monitor thread with handle"1075 " %#.8lx\n",1076 th->th.th_info.ds.ds_thread));1077 1078 // If monitor has been created, its tid and gtid should be KMP_GTID_MONITOR.1079 // If both tid and gtid are 0, it means the monitor did not ever start.1080 // If both tid and gtid are KMP_GTID_DNE, the monitor has been shut down.1081 KMP_DEBUG_ASSERT(th->th.th_info.ds.ds_tid == th->th.th_info.ds.ds_gtid);1082 if (th->th.th_info.ds.ds_gtid != KMP_GTID_MONITOR) {1083 KA_TRACE(10, ("__kmp_reap_monitor: monitor did not start, returning\n"));1084 return;1085 }1086 1087 KMP_MB(); /* Flush all pending memory write invalidates. */1088 1089 /* First, check to see whether the monitor thread exists to wake it up. This1090 is to avoid performance problem when the monitor sleeps during1091 blocktime-size interval */1092 1093 status = pthread_kill(th->th.th_info.ds.ds_thread, 0);1094 if (status != ESRCH) {1095 __kmp_resume_monitor(); // Wake up the monitor thread1096 }1097 KA_TRACE(10, ("__kmp_reap_monitor: try to join with monitor\n"));1098 status = pthread_join(th->th.th_info.ds.ds_thread, &exit_val);1099 if (exit_val != th) {1100 __kmp_fatal(KMP_MSG(ReapMonitorError), KMP_ERR(status), __kmp_msg_null);1101 }1102 1103 th->th.th_info.ds.ds_tid = KMP_GTID_DNE;1104 th->th.th_info.ds.ds_gtid = KMP_GTID_DNE;1105 1106 KA_TRACE(10, ("__kmp_reap_monitor: done reaping monitor thread with handle"1107 " %#.8lx\n",1108 th->th.th_info.ds.ds_thread));1109 1110 KMP_MB(); /* Flush all pending memory write invalidates. */1111}1112#else1113// Empty symbol to export (see exports_so.txt) when1114// monitor thread feature is disabled1115extern "C" void __kmp_reap_monitor(kmp_info_t *th) { (void)th; }1116#endif // KMP_USE_MONITOR1117 1118void __kmp_reap_worker(kmp_info_t *th) {1119 int status;1120 void *exit_val;1121 1122 KMP_MB(); /* Flush all pending memory write invalidates. */1123 1124 KA_TRACE(1125 10, ("__kmp_reap_worker: try to reap T#%d\n", th->th.th_info.ds.ds_gtid));1126 1127 status = pthread_join(th->th.th_info.ds.ds_thread, &exit_val);1128#ifdef KMP_DEBUG1129 /* Don't expose these to the user until we understand when they trigger */1130 if (status != 0) {1131 __kmp_fatal(KMP_MSG(ReapWorkerError), KMP_ERR(status), __kmp_msg_null);1132 }1133 if (exit_val != th) {1134 KA_TRACE(10, ("__kmp_reap_worker: worker T#%d did not reap properly, "1135 "exit_val = %p\n",1136 th->th.th_info.ds.ds_gtid, exit_val));1137 }1138#else1139 (void)status; // unused variable1140#endif /* KMP_DEBUG */1141 1142 KA_TRACE(10, ("__kmp_reap_worker: done reaping T#%d\n",1143 th->th.th_info.ds.ds_gtid));1144 1145 KMP_MB(); /* Flush all pending memory write invalidates. */1146}1147 1148#if KMP_HANDLE_SIGNALS1149 1150static void __kmp_null_handler(int signo) {1151 // Do nothing, for doing SIG_IGN-type actions.1152} // __kmp_null_handler1153 1154static void __kmp_team_handler(int signo) {1155 if (__kmp_global.g.g_abort == 0) {1156/* Stage 1 signal handler, let's shut down all of the threads */1157#ifdef KMP_DEBUG1158 __kmp_debug_printf("__kmp_team_handler: caught signal = %d\n", signo);1159#endif1160 switch (signo) {1161 case SIGHUP:1162 case SIGINT:1163 case SIGQUIT:1164 case SIGILL:1165 case SIGABRT:1166 case SIGFPE:1167 case SIGBUS:1168 case SIGSEGV:1169#ifdef SIGSYS1170 case SIGSYS:1171#endif1172 case SIGTERM:1173 if (__kmp_debug_buf) {1174 __kmp_dump_debug_buffer();1175 }1176 __kmp_unregister_library(); // cleanup shared memory1177 KMP_MB(); // Flush all pending memory write invalidates.1178 TCW_4(__kmp_global.g.g_abort, signo);1179 KMP_MB(); // Flush all pending memory write invalidates.1180 TCW_4(__kmp_global.g.g_done, TRUE);1181 KMP_MB(); // Flush all pending memory write invalidates.1182 break;1183 default:1184#ifdef KMP_DEBUG1185 __kmp_debug_printf("__kmp_team_handler: unknown signal type");1186#endif1187 break;1188 }1189 }1190} // __kmp_team_handler1191 1192static void __kmp_sigaction(int signum, const struct sigaction *act,1193 struct sigaction *oldact) {1194 int rc = sigaction(signum, act, oldact);1195 KMP_CHECK_SYSFAIL_ERRNO("sigaction", rc);1196}1197 1198static void __kmp_install_one_handler(int sig, sig_func_t handler_func,1199 int parallel_init) {1200 KMP_MB(); // Flush all pending memory write invalidates.1201 KB_TRACE(60,1202 ("__kmp_install_one_handler( %d, ..., %d )\n", sig, parallel_init));1203 if (parallel_init) {1204 struct sigaction new_action;1205 struct sigaction old_action;1206 new_action.sa_handler = handler_func;1207 new_action.sa_flags = 0;1208 sigfillset(&new_action.sa_mask);1209 __kmp_sigaction(sig, &new_action, &old_action);1210 if (old_action.sa_handler == __kmp_sighldrs[sig].sa_handler) {1211 sigaddset(&__kmp_sigset, sig);1212 } else {1213 // Restore/keep user's handler if one previously installed.1214 __kmp_sigaction(sig, &old_action, NULL);1215 }1216 } else {1217 // Save initial/system signal handlers to see if user handlers installed.1218 __kmp_sigaction(sig, NULL, &__kmp_sighldrs[sig]);1219 }1220 KMP_MB(); // Flush all pending memory write invalidates.1221} // __kmp_install_one_handler1222 1223static void __kmp_remove_one_handler(int sig) {1224 KB_TRACE(60, ("__kmp_remove_one_handler( %d )\n", sig));1225 if (sigismember(&__kmp_sigset, sig)) {1226 struct sigaction old;1227 KMP_MB(); // Flush all pending memory write invalidates.1228 __kmp_sigaction(sig, &__kmp_sighldrs[sig], &old);1229 if ((old.sa_handler != __kmp_team_handler) &&1230 (old.sa_handler != __kmp_null_handler)) {1231 // Restore the users signal handler.1232 KB_TRACE(10, ("__kmp_remove_one_handler: oops, not our handler, "1233 "restoring: sig=%d\n",1234 sig));1235 __kmp_sigaction(sig, &old, NULL);1236 }1237 sigdelset(&__kmp_sigset, sig);1238 KMP_MB(); // Flush all pending memory write invalidates.1239 }1240} // __kmp_remove_one_handler1241 1242void __kmp_install_signals(int parallel_init) {1243 KB_TRACE(10, ("__kmp_install_signals( %d )\n", parallel_init));1244 if (__kmp_handle_signals || !parallel_init) {1245 // If ! parallel_init, we do not install handlers, just save original1246 // handlers. Let us do it even __handle_signals is 0.1247 sigemptyset(&__kmp_sigset);1248 __kmp_install_one_handler(SIGHUP, __kmp_team_handler, parallel_init);1249 __kmp_install_one_handler(SIGINT, __kmp_team_handler, parallel_init);1250 __kmp_install_one_handler(SIGQUIT, __kmp_team_handler, parallel_init);1251 __kmp_install_one_handler(SIGILL, __kmp_team_handler, parallel_init);1252 __kmp_install_one_handler(SIGABRT, __kmp_team_handler, parallel_init);1253 __kmp_install_one_handler(SIGFPE, __kmp_team_handler, parallel_init);1254 __kmp_install_one_handler(SIGBUS, __kmp_team_handler, parallel_init);1255 __kmp_install_one_handler(SIGSEGV, __kmp_team_handler, parallel_init);1256#ifdef SIGSYS1257 __kmp_install_one_handler(SIGSYS, __kmp_team_handler, parallel_init);1258#endif // SIGSYS1259 __kmp_install_one_handler(SIGTERM, __kmp_team_handler, parallel_init);1260#ifdef SIGPIPE1261 __kmp_install_one_handler(SIGPIPE, __kmp_team_handler, parallel_init);1262#endif // SIGPIPE1263 }1264} // __kmp_install_signals1265 1266void __kmp_remove_signals(void) {1267 int sig;1268 KB_TRACE(10, ("__kmp_remove_signals()\n"));1269 for (sig = 1; sig < NSIG; ++sig) {1270 __kmp_remove_one_handler(sig);1271 }1272} // __kmp_remove_signals1273 1274#endif // KMP_HANDLE_SIGNALS1275 1276void __kmp_enable(int new_state) {1277#ifdef KMP_CANCEL_THREADS1278 int status, old_state;1279 status = pthread_setcancelstate(new_state, &old_state);1280 KMP_CHECK_SYSFAIL("pthread_setcancelstate", status);1281 KMP_DEBUG_ASSERT(old_state == PTHREAD_CANCEL_DISABLE);1282#endif1283}1284 1285void __kmp_disable(int *old_state) {1286#ifdef KMP_CANCEL_THREADS1287 int status;1288 status = pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, old_state);1289 KMP_CHECK_SYSFAIL("pthread_setcancelstate", status);1290#endif1291}1292 1293static void __kmp_atfork_prepare(void) {1294 __kmp_acquire_bootstrap_lock(&__kmp_initz_lock);1295 __kmp_acquire_bootstrap_lock(&__kmp_forkjoin_lock);1296}1297 1298static void __kmp_atfork_parent(void) {1299 __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock);1300 __kmp_release_bootstrap_lock(&__kmp_initz_lock);1301}1302 1303/* Reset the library so execution in the child starts "all over again" with1304 clean data structures in initial states. Don't worry about freeing memory1305 allocated by parent, just abandon it to be safe. */1306static void __kmp_atfork_child(void) {1307 __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock);1308 __kmp_release_bootstrap_lock(&__kmp_initz_lock);1309 /* TODO make sure this is done right for nested/sibling */1310 // ATT: Memory leaks are here? TODO: Check it and fix.1311 /* KMP_ASSERT( 0 ); */1312 1313 ++__kmp_fork_count;1314 1315#if KMP_AFFINITY_SUPPORTED1316#if KMP_OS_LINUX || KMP_OS_FREEBSD || KMP_OS_NETBSD || KMP_OS_DRAGONFLY || \1317 KMP_OS_AIX1318 // reset the affinity in the child to the initial thread1319 // affinity in the parent1320 kmp_set_thread_affinity_mask_initial();1321#endif1322 // Set default not to bind threads tightly in the child (we're expecting1323 // over-subscription after the fork and this can improve things for1324 // scripting languages that use OpenMP inside process-parallel code).1325 if (__kmp_nested_proc_bind.bind_types != NULL) {1326 __kmp_nested_proc_bind.bind_types[0] = proc_bind_false;1327 }1328 for (kmp_affinity_t *affinity : __kmp_affinities)1329 *affinity = KMP_AFFINITY_INIT(affinity->env_var);1330 __kmp_affin_fullMask = nullptr;1331 __kmp_affin_origMask = nullptr;1332 __kmp_topology = nullptr;1333#endif // KMP_AFFINITY_SUPPORTED1334 1335#if KMP_USE_MONITOR1336 __kmp_init_monitor = 0;1337#endif1338 __kmp_init_parallel = FALSE;1339 __kmp_init_middle = FALSE;1340 __kmp_init_serial = FALSE;1341 TCW_4(__kmp_init_gtid, FALSE);1342 __kmp_init_common = FALSE;1343 1344 TCW_4(__kmp_init_user_locks, FALSE);1345#if !KMP_USE_DYNAMIC_LOCK1346 __kmp_user_lock_table.used = 1;1347 __kmp_user_lock_table.allocated = 0;1348 __kmp_user_lock_table.table = NULL;1349 __kmp_lock_blocks = NULL;1350#endif1351 1352 __kmp_all_nth = 0;1353 TCW_4(__kmp_nth, 0);1354 1355 __kmp_thread_pool = NULL;1356 __kmp_thread_pool_insert_pt = NULL;1357 __kmp_team_pool = NULL;1358 1359 /* Must actually zero all the *cache arguments passed to __kmpc_threadprivate1360 here so threadprivate doesn't use stale data */1361 KA_TRACE(10, ("__kmp_atfork_child: checking cache address list %p\n",1362 __kmp_threadpriv_cache_list));1363 1364 while (__kmp_threadpriv_cache_list != NULL) {1365 1366 if (*__kmp_threadpriv_cache_list->addr != NULL) {1367 KC_TRACE(50, ("__kmp_atfork_child: zeroing cache at address %p\n",1368 &(*__kmp_threadpriv_cache_list->addr)));1369 1370 *__kmp_threadpriv_cache_list->addr = NULL;1371 }1372 __kmp_threadpriv_cache_list = __kmp_threadpriv_cache_list->next;1373 }1374 1375 __kmp_init_runtime = FALSE;1376 1377 /* reset statically initialized locks */1378 __kmp_init_bootstrap_lock(&__kmp_initz_lock);1379 __kmp_init_bootstrap_lock(&__kmp_stdio_lock);1380 __kmp_init_bootstrap_lock(&__kmp_console_lock);1381 __kmp_init_bootstrap_lock(&__kmp_task_team_lock);1382 1383#if USE_ITT_BUILD1384 __kmp_itt_reset(); // reset ITT's global state1385#endif /* USE_ITT_BUILD */1386 1387 {1388 // Child process often get terminated without any use of OpenMP. That might1389 // cause mapped shared memory file to be left unattended. Thus we postpone1390 // library registration till middle initialization in the child process.1391 __kmp_need_register_serial = FALSE;1392 __kmp_serial_initialize();1393 }1394 1395 /* This is necessary to make sure no stale data is left around */1396 /* AC: customers complain that we use unsafe routines in the atfork1397 handler. Mathworks: dlsym() is unsafe. We call dlsym and dlopen1398 in dynamic_link when check the presence of shared tbbmalloc library.1399 Suggestion is to make the library initialization lazier, similar1400 to what done for __kmpc_begin(). */1401 // TODO: synchronize all static initializations with regular library1402 // startup; look at kmp_global.cpp and etc.1403 //__kmp_internal_begin ();1404}1405 1406void __kmp_register_atfork(void) {1407 if (__kmp_need_register_atfork) {1408#if !KMP_OS_WASI1409 int status = pthread_atfork(__kmp_atfork_prepare, __kmp_atfork_parent,1410 __kmp_atfork_child);1411 KMP_CHECK_SYSFAIL("pthread_atfork", status);1412#endif1413 __kmp_need_register_atfork = FALSE;1414 }1415}1416 1417void __kmp_suspend_initialize(void) {1418 int status;1419 status = pthread_mutexattr_init(&__kmp_suspend_mutex_attr);1420 KMP_CHECK_SYSFAIL("pthread_mutexattr_init", status);1421 status = pthread_condattr_init(&__kmp_suspend_cond_attr);1422 KMP_CHECK_SYSFAIL("pthread_condattr_init", status);1423}1424 1425void __kmp_suspend_initialize_thread(kmp_info_t *th) {1426 int old_value = KMP_ATOMIC_LD_RLX(&th->th.th_suspend_init_count);1427 int new_value = __kmp_fork_count + 1;1428 // Return if already initialized1429 if (old_value == new_value)1430 return;1431 // Wait, then return if being initialized1432 if (old_value == -1 || !__kmp_atomic_compare_store(1433 &th->th.th_suspend_init_count, old_value, -1)) {1434 while (KMP_ATOMIC_LD_ACQ(&th->th.th_suspend_init_count) != new_value) {1435 KMP_CPU_PAUSE();1436 }1437 } else {1438 // Claim to be the initializer and do initializations1439 int status;1440 status = pthread_cond_init(&th->th.th_suspend_cv.c_cond,1441 &__kmp_suspend_cond_attr);1442 KMP_CHECK_SYSFAIL("pthread_cond_init", status);1443 status = pthread_mutex_init(&th->th.th_suspend_mx.m_mutex,1444 &__kmp_suspend_mutex_attr);1445 KMP_CHECK_SYSFAIL("pthread_mutex_init", status);1446 KMP_ATOMIC_ST_REL(&th->th.th_suspend_init_count, new_value);1447 }1448}1449 1450void __kmp_suspend_uninitialize_thread(kmp_info_t *th) {1451 if (KMP_ATOMIC_LD_ACQ(&th->th.th_suspend_init_count) > __kmp_fork_count) {1452 /* this means we have initialize the suspension pthread objects for this1453 thread in this instance of the process */1454 int status;1455 1456 status = pthread_cond_destroy(&th->th.th_suspend_cv.c_cond);1457 if (status != 0 && status != EBUSY) {1458 KMP_SYSFAIL("pthread_cond_destroy", status);1459 }1460 status = pthread_mutex_destroy(&th->th.th_suspend_mx.m_mutex);1461 if (status != 0 && status != EBUSY) {1462 KMP_SYSFAIL("pthread_mutex_destroy", status);1463 }1464 --th->th.th_suspend_init_count;1465 KMP_DEBUG_ASSERT(KMP_ATOMIC_LD_RLX(&th->th.th_suspend_init_count) ==1466 __kmp_fork_count);1467 }1468}1469 1470// return true if lock obtained, false otherwise1471int __kmp_try_suspend_mx(kmp_info_t *th) {1472 return (pthread_mutex_trylock(&th->th.th_suspend_mx.m_mutex) == 0);1473}1474 1475void __kmp_lock_suspend_mx(kmp_info_t *th) {1476 int status = pthread_mutex_lock(&th->th.th_suspend_mx.m_mutex);1477 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status);1478}1479 1480void __kmp_unlock_suspend_mx(kmp_info_t *th) {1481 int status = pthread_mutex_unlock(&th->th.th_suspend_mx.m_mutex);1482 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status);1483}1484 1485/* This routine puts the calling thread to sleep after setting the1486 sleep bit for the indicated flag variable to true. */1487template <class C>1488static inline void __kmp_suspend_template(int th_gtid, C *flag) {1489 KMP_TIME_DEVELOPER_PARTITIONED_BLOCK(USER_suspend);1490 kmp_info_t *th = __kmp_threads[th_gtid];1491 int status;1492 typename C::flag_t old_spin;1493 1494 KF_TRACE(30, ("__kmp_suspend_template: T#%d enter for flag = %p\n", th_gtid,1495 flag->get()));1496 1497 __kmp_suspend_initialize_thread(th);1498 1499 __kmp_lock_suspend_mx(th);1500 1501 KF_TRACE(10, ("__kmp_suspend_template: T#%d setting sleep bit for spin(%p)\n",1502 th_gtid, flag->get()));1503 1504 /* TODO: shouldn't this use release semantics to ensure that1505 __kmp_suspend_initialize_thread gets called first? */1506 old_spin = flag->set_sleeping();1507 TCW_PTR(th->th.th_sleep_loc, (void *)flag);1508 th->th.th_sleep_loc_type = flag->get_type();1509 if (__kmp_dflt_blocktime == KMP_MAX_BLOCKTIME &&1510 __kmp_pause_status != kmp_soft_paused) {1511 flag->unset_sleeping();1512 TCW_PTR(th->th.th_sleep_loc, NULL);1513 th->th.th_sleep_loc_type = flag_unset;1514 __kmp_unlock_suspend_mx(th);1515 return;1516 }1517 KF_TRACE(5, ("__kmp_suspend_template: T#%d set sleep bit for spin(%p)==%x,"1518 " was %x\n",1519 th_gtid, flag->get(), flag->load(), old_spin));1520 1521 if (flag->done_check_val(old_spin) || flag->done_check()) {1522 flag->unset_sleeping();1523 TCW_PTR(th->th.th_sleep_loc, NULL);1524 th->th.th_sleep_loc_type = flag_unset;1525 KF_TRACE(5, ("__kmp_suspend_template: T#%d false alarm, reset sleep bit "1526 "for spin(%p)\n",1527 th_gtid, flag->get()));1528 } else {1529 /* Encapsulate in a loop as the documentation states that this may1530 "with low probability" return when the condition variable has1531 not been signaled or broadcast */1532 int deactivated = FALSE;1533 1534 while (flag->is_sleeping()) {1535#ifdef DEBUG_SUSPEND1536 char buffer[128];1537 __kmp_suspend_count++;1538 __kmp_print_cond(buffer, &th->th.th_suspend_cv);1539 __kmp_printf("__kmp_suspend_template: suspending T#%d: %s\n", th_gtid,1540 buffer);1541#endif1542 // Mark the thread as no longer active (only in the first iteration of the1543 // loop).1544 if (!deactivated) {1545 th->th.th_active = FALSE;1546 if (th->th.th_active_in_pool) {1547 th->th.th_active_in_pool = FALSE;1548 KMP_ATOMIC_DEC(&__kmp_thread_pool_active_nth);1549 KMP_DEBUG_ASSERT(TCR_4(__kmp_thread_pool_active_nth) >= 0);1550 }1551 deactivated = TRUE;1552 }1553 1554 KMP_DEBUG_ASSERT(th->th.th_sleep_loc);1555 KMP_DEBUG_ASSERT(flag->get_type() == th->th.th_sleep_loc_type);1556 1557#if USE_SUSPEND_TIMEOUT1558 struct timespec now;1559 struct timeval tval;1560 int msecs;1561 1562 status = gettimeofday(&tval, NULL);1563 KMP_CHECK_SYSFAIL_ERRNO("gettimeofday", status);1564 TIMEVAL_TO_TIMESPEC(&tval, &now);1565 1566 msecs = (4 * __kmp_dflt_blocktime) + 200;1567 now.tv_sec += msecs / 1000;1568 now.tv_nsec += (msecs % 1000) * 1000;1569 1570 KF_TRACE(15, ("__kmp_suspend_template: T#%d about to perform "1571 "pthread_cond_timedwait\n",1572 th_gtid));1573 status = pthread_cond_timedwait(&th->th.th_suspend_cv.c_cond,1574 &th->th.th_suspend_mx.m_mutex, &now);1575#else1576 KF_TRACE(15, ("__kmp_suspend_template: T#%d about to perform"1577 " pthread_cond_wait\n",1578 th_gtid));1579 status = pthread_cond_wait(&th->th.th_suspend_cv.c_cond,1580 &th->th.th_suspend_mx.m_mutex);1581#endif // USE_SUSPEND_TIMEOUT1582 1583 if ((status != 0) && (status != EINTR) && (status != ETIMEDOUT)) {1584 KMP_SYSFAIL("pthread_cond_wait", status);1585 }1586 1587 KMP_DEBUG_ASSERT(flag->get_type() == flag->get_ptr_type());1588 1589 if (!flag->is_sleeping() &&1590 ((status == EINTR) || (status == ETIMEDOUT))) {1591 // if interrupt or timeout, and thread is no longer sleeping, we need to1592 // make sure sleep_loc gets reset; however, this shouldn't be needed if1593 // we woke up with resume1594 flag->unset_sleeping();1595 TCW_PTR(th->th.th_sleep_loc, NULL);1596 th->th.th_sleep_loc_type = flag_unset;1597 }1598#ifdef KMP_DEBUG1599 if (status == ETIMEDOUT) {1600 if (flag->is_sleeping()) {1601 KF_TRACE(100,1602 ("__kmp_suspend_template: T#%d timeout wakeup\n", th_gtid));1603 } else {1604 KF_TRACE(2, ("__kmp_suspend_template: T#%d timeout wakeup, sleep bit "1605 "not set!\n",1606 th_gtid));1607 TCW_PTR(th->th.th_sleep_loc, NULL);1608 th->th.th_sleep_loc_type = flag_unset;1609 }1610 } else if (flag->is_sleeping()) {1611 KF_TRACE(100,1612 ("__kmp_suspend_template: T#%d spurious wakeup\n", th_gtid));1613 }1614#endif1615 } // while1616 1617 // Mark the thread as active again (if it was previous marked as inactive)1618 if (deactivated) {1619 th->th.th_active = TRUE;1620 if (TCR_4(th->th.th_in_pool)) {1621 KMP_ATOMIC_INC(&__kmp_thread_pool_active_nth);1622 th->th.th_active_in_pool = TRUE;1623 }1624 }1625 }1626 // We may have had the loop variable set before entering the loop body;1627 // so we need to reset sleep_loc.1628 TCW_PTR(th->th.th_sleep_loc, NULL);1629 th->th.th_sleep_loc_type = flag_unset;1630 1631 KMP_DEBUG_ASSERT(!flag->is_sleeping());1632 KMP_DEBUG_ASSERT(!th->th.th_sleep_loc);1633#ifdef DEBUG_SUSPEND1634 {1635 char buffer[128];1636 __kmp_print_cond(buffer, &th->th.th_suspend_cv);1637 __kmp_printf("__kmp_suspend_template: T#%d has awakened: %s\n", th_gtid,1638 buffer);1639 }1640#endif1641 1642 __kmp_unlock_suspend_mx(th);1643 KF_TRACE(30, ("__kmp_suspend_template: T#%d exit\n", th_gtid));1644}1645 1646template <bool C, bool S>1647void __kmp_suspend_32(int th_gtid, kmp_flag_32<C, S> *flag) {1648 __kmp_suspend_template(th_gtid, flag);1649}1650template <bool C, bool S>1651void __kmp_suspend_64(int th_gtid, kmp_flag_64<C, S> *flag) {1652 __kmp_suspend_template(th_gtid, flag);1653}1654template <bool C, bool S>1655void __kmp_atomic_suspend_64(int th_gtid, kmp_atomic_flag_64<C, S> *flag) {1656 __kmp_suspend_template(th_gtid, flag);1657}1658void __kmp_suspend_oncore(int th_gtid, kmp_flag_oncore *flag) {1659 __kmp_suspend_template(th_gtid, flag);1660}1661 1662template void __kmp_suspend_32<false, false>(int, kmp_flag_32<false, false> *);1663template void __kmp_suspend_64<false, true>(int, kmp_flag_64<false, true> *);1664template void __kmp_suspend_64<true, false>(int, kmp_flag_64<true, false> *);1665template void1666__kmp_atomic_suspend_64<false, true>(int, kmp_atomic_flag_64<false, true> *);1667template void1668__kmp_atomic_suspend_64<true, false>(int, kmp_atomic_flag_64<true, false> *);1669 1670/* This routine signals the thread specified by target_gtid to wake up1671 after setting the sleep bit indicated by the flag argument to FALSE.1672 The target thread must already have called __kmp_suspend_template() */1673template <class C>1674static inline void __kmp_resume_template(int target_gtid, C *flag) {1675 KMP_TIME_DEVELOPER_PARTITIONED_BLOCK(USER_resume);1676 kmp_info_t *th = __kmp_threads[target_gtid];1677 int status;1678 1679#ifdef KMP_DEBUG1680 int gtid = TCR_4(__kmp_init_gtid) ? __kmp_get_gtid() : -1;1681#endif1682 1683 KF_TRACE(30, ("__kmp_resume_template: T#%d wants to wakeup T#%d enter\n",1684 gtid, target_gtid));1685 KMP_DEBUG_ASSERT(gtid != target_gtid);1686 1687 __kmp_suspend_initialize_thread(th);1688 1689 __kmp_lock_suspend_mx(th);1690 1691 if (!flag || flag != th->th.th_sleep_loc) {1692 // coming from __kmp_null_resume_wrapper, or thread is now sleeping on a1693 // different location; wake up at new location1694 flag = (C *)CCAST(void *, th->th.th_sleep_loc);1695 }1696 1697 // First, check if the flag is null or its type has changed. If so, someone1698 // else woke it up.1699 if (!flag) { // Thread doesn't appear to be sleeping on anything1700 KF_TRACE(5, ("__kmp_resume_template: T#%d exiting, thread T#%d already "1701 "awake: flag(%p)\n",1702 gtid, target_gtid, (void *)NULL));1703 __kmp_unlock_suspend_mx(th);1704 return;1705 } else if (flag->get_type() != th->th.th_sleep_loc_type) {1706 // Flag type does not appear to match this function template; possibly the1707 // thread is sleeping on something else. Try null resume again.1708 KF_TRACE(1709 5,1710 ("__kmp_resume_template: T#%d retrying, thread T#%d Mismatch flag(%p), "1711 "spin(%p) type=%d ptr_type=%d\n",1712 gtid, target_gtid, flag, flag->get(), flag->get_type(),1713 th->th.th_sleep_loc_type));1714 __kmp_unlock_suspend_mx(th);1715 __kmp_null_resume_wrapper(th);1716 return;1717 } else { // if multiple threads are sleeping, flag should be internally1718 // referring to a specific thread here1719 if (!flag->is_sleeping()) {1720 KF_TRACE(5, ("__kmp_resume_template: T#%d exiting, thread T#%d already "1721 "awake: flag(%p): %u\n",1722 gtid, target_gtid, flag->get(), (unsigned int)flag->load()));1723 __kmp_unlock_suspend_mx(th);1724 return;1725 }1726 }1727 KMP_DEBUG_ASSERT(flag);1728 flag->unset_sleeping();1729 TCW_PTR(th->th.th_sleep_loc, NULL);1730 th->th.th_sleep_loc_type = flag_unset;1731 1732 KF_TRACE(5, ("__kmp_resume_template: T#%d about to wakeup T#%d, reset "1733 "sleep bit for flag's loc(%p): %u\n",1734 gtid, target_gtid, flag->get(), (unsigned int)flag->load()));1735 1736#ifdef DEBUG_SUSPEND1737 {1738 char buffer[128];1739 __kmp_print_cond(buffer, &th->th.th_suspend_cv);1740 __kmp_printf("__kmp_resume_template: T#%d resuming T#%d: %s\n", gtid,1741 target_gtid, buffer);1742 }1743#endif1744 status = pthread_cond_signal(&th->th.th_suspend_cv.c_cond);1745 KMP_CHECK_SYSFAIL("pthread_cond_signal", status);1746 __kmp_unlock_suspend_mx(th);1747 KF_TRACE(30, ("__kmp_resume_template: T#%d exiting after signaling wake up"1748 " for T#%d\n",1749 gtid, target_gtid));1750}1751 1752template <bool C, bool S>1753void __kmp_resume_32(int target_gtid, kmp_flag_32<C, S> *flag) {1754 __kmp_resume_template(target_gtid, flag);1755}1756template <bool C, bool S>1757void __kmp_resume_64(int target_gtid, kmp_flag_64<C, S> *flag) {1758 __kmp_resume_template(target_gtid, flag);1759}1760template <bool C, bool S>1761void __kmp_atomic_resume_64(int target_gtid, kmp_atomic_flag_64<C, S> *flag) {1762 __kmp_resume_template(target_gtid, flag);1763}1764void __kmp_resume_oncore(int target_gtid, kmp_flag_oncore *flag) {1765 __kmp_resume_template(target_gtid, flag);1766}1767 1768template void __kmp_resume_32<false, true>(int, kmp_flag_32<false, true> *);1769template void __kmp_resume_32<false, false>(int, kmp_flag_32<false, false> *);1770template void __kmp_resume_64<false, true>(int, kmp_flag_64<false, true> *);1771template void1772__kmp_atomic_resume_64<false, true>(int, kmp_atomic_flag_64<false, true> *);1773 1774#if KMP_USE_MONITOR1775void __kmp_resume_monitor() {1776 KMP_TIME_DEVELOPER_PARTITIONED_BLOCK(USER_resume);1777 int status;1778#ifdef KMP_DEBUG1779 int gtid = TCR_4(__kmp_init_gtid) ? __kmp_get_gtid() : -1;1780 KF_TRACE(30, ("__kmp_resume_monitor: T#%d wants to wakeup T#%d enter\n", gtid,1781 KMP_GTID_MONITOR));1782 KMP_DEBUG_ASSERT(gtid != KMP_GTID_MONITOR);1783#endif1784 status = pthread_mutex_lock(&__kmp_wait_mx.m_mutex);1785 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status);1786#ifdef DEBUG_SUSPEND1787 {1788 char buffer[128];1789 __kmp_print_cond(buffer, &__kmp_wait_cv.c_cond);1790 __kmp_printf("__kmp_resume_monitor: T#%d resuming T#%d: %s\n", gtid,1791 KMP_GTID_MONITOR, buffer);1792 }1793#endif1794 status = pthread_cond_signal(&__kmp_wait_cv.c_cond);1795 KMP_CHECK_SYSFAIL("pthread_cond_signal", status);1796 status = pthread_mutex_unlock(&__kmp_wait_mx.m_mutex);1797 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status);1798 KF_TRACE(30, ("__kmp_resume_monitor: T#%d exiting after signaling wake up"1799 " for T#%d\n",1800 gtid, KMP_GTID_MONITOR));1801}1802#endif // KMP_USE_MONITOR1803 1804void __kmp_yield() { sched_yield(); }1805 1806void __kmp_gtid_set_specific(int gtid) {1807 if (__kmp_init_gtid) {1808 int status;1809 status = pthread_setspecific(__kmp_gtid_threadprivate_key,1810 (void *)(intptr_t)(gtid + 1));1811 KMP_CHECK_SYSFAIL("pthread_setspecific", status);1812 } else {1813 KA_TRACE(50, ("__kmp_gtid_set_specific: runtime shutdown, returning\n"));1814 }1815}1816 1817int __kmp_gtid_get_specific() {1818 int gtid;1819 if (!__kmp_init_gtid) {1820 KA_TRACE(50, ("__kmp_gtid_get_specific: runtime shutdown, returning "1821 "KMP_GTID_SHUTDOWN\n"));1822 return KMP_GTID_SHUTDOWN;1823 }1824 gtid = (int)(size_t)pthread_getspecific(__kmp_gtid_threadprivate_key);1825 if (gtid == 0) {1826 gtid = KMP_GTID_DNE;1827 } else {1828 gtid--;1829 }1830 KA_TRACE(50, ("__kmp_gtid_get_specific: key:%d gtid:%d\n",1831 __kmp_gtid_threadprivate_key, gtid));1832 return gtid;1833}1834 1835double __kmp_read_cpu_time(void) {1836 /*clock_t t;*/1837 struct tms buffer;1838 1839 /*t =*/times(&buffer);1840 1841 return (double)(buffer.tms_utime + buffer.tms_cutime) /1842 (double)CLOCKS_PER_SEC;1843}1844 1845int __kmp_read_system_info(struct kmp_sys_info *info) {1846 int status;1847 struct rusage r_usage;1848 1849 memset(info, 0, sizeof(*info));1850 1851 status = getrusage(RUSAGE_SELF, &r_usage);1852 KMP_CHECK_SYSFAIL_ERRNO("getrusage", status);1853 1854#if !KMP_OS_WASI1855 // The maximum resident set size utilized (in kilobytes)1856 info->maxrss = r_usage.ru_maxrss;1857 // The number of page faults serviced without any I/O1858 info->minflt = r_usage.ru_minflt;1859 // The number of page faults serviced that required I/O1860 info->majflt = r_usage.ru_majflt;1861 // The number of times a process was "swapped" out of memory1862 info->nswap = r_usage.ru_nswap;1863 // The number of times the file system had to perform input1864 info->inblock = r_usage.ru_inblock;1865 // The number of times the file system had to perform output1866 info->oublock = r_usage.ru_oublock;1867 // The number of times a context switch was voluntarily1868 info->nvcsw = r_usage.ru_nvcsw;1869 // The number of times a context switch was forced1870 info->nivcsw = r_usage.ru_nivcsw;1871#endif1872 1873 return (status != 0);1874}1875 1876void __kmp_read_system_time(double *delta) {1877 double t_ns;1878 struct timeval tval;1879 struct timespec stop;1880 int status;1881 1882 status = gettimeofday(&tval, NULL);1883 KMP_CHECK_SYSFAIL_ERRNO("gettimeofday", status);1884 TIMEVAL_TO_TIMESPEC(&tval, &stop);1885 t_ns = (double)(TS2NS(stop) - TS2NS(__kmp_sys_timer_data.start));1886 *delta = (t_ns * 1e-9);1887}1888 1889void __kmp_clear_system_time(void) {1890 struct timeval tval;1891 int status;1892 status = gettimeofday(&tval, NULL);1893 KMP_CHECK_SYSFAIL_ERRNO("gettimeofday", status);1894 TIMEVAL_TO_TIMESPEC(&tval, &__kmp_sys_timer_data.start);1895}1896 1897static int __kmp_get_xproc(void) {1898 1899 int r = 0;1900 1901#if KMP_OS_LINUX1902 1903 __kmp_type_convert(sysconf(_SC_NPROCESSORS_CONF), &(r));1904 1905#elif KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD || KMP_OS_OPENBSD || \1906 KMP_OS_HAIKU || KMP_OS_HURD || KMP_OS_SOLARIS || KMP_OS_WASI || KMP_OS_AIX1907 1908 __kmp_type_convert(sysconf(_SC_NPROCESSORS_ONLN), &(r));1909 1910#elif KMP_OS_DARWIN1911 1912 size_t len = sizeof(r);1913 sysctlbyname("hw.logicalcpu", &r, &len, NULL, 0);1914 1915#else1916 1917#error "Unknown or unsupported OS."1918 1919#endif1920 1921 return r > 0 ? r : 2; /* guess value of 2 if OS told us 0 */1922 1923} // __kmp_get_xproc1924 1925int __kmp_read_from_file(char const *path, char const *format, ...) {1926 int result;1927 va_list args;1928 1929 va_start(args, format);1930 FILE *f = fopen(path, "rb");1931 if (f == NULL) {1932 va_end(args);1933 return 0;1934 }1935 result = vfscanf(f, format, args);1936 fclose(f);1937 va_end(args);1938 1939 return result;1940}1941 1942void __kmp_runtime_initialize(void) {1943 int status;1944 pthread_mutexattr_t mutex_attr;1945 pthread_condattr_t cond_attr;1946 1947 if (__kmp_init_runtime) {1948 return;1949 }1950 1951#if (KMP_ARCH_X86 || KMP_ARCH_X86_64)1952 if (!__kmp_cpuinfo.initialized) {1953 __kmp_query_cpuid(&__kmp_cpuinfo);1954 }1955#endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */1956 1957 __kmp_xproc = __kmp_get_xproc();1958 1959#if !KMP_32_BIT_ARCH1960 struct rlimit rlim;1961 // read stack size of calling thread, save it as default for worker threads;1962 // this should be done before reading environment variables1963 status = getrlimit(RLIMIT_STACK, &rlim);1964 if (status == 0) { // success?1965 __kmp_stksize = rlim.rlim_cur;1966 __kmp_check_stksize(&__kmp_stksize); // check value and adjust if needed1967 }1968#endif /* KMP_32_BIT_ARCH */1969 1970 if (sysconf(_SC_THREADS)) {1971 1972 /* Query the maximum number of threads */1973 __kmp_type_convert(sysconf(_SC_THREAD_THREADS_MAX), &(__kmp_sys_max_nth));1974#ifdef __ve__1975 if (__kmp_sys_max_nth == -1) {1976 // VE's pthread supports only up to 64 threads per a VE process.1977 // So we use that KMP_MAX_NTH (predefined as 64) here.1978 __kmp_sys_max_nth = KMP_MAX_NTH;1979 }1980#else1981 if (__kmp_sys_max_nth == -1) {1982 /* Unlimited threads for NPTL */1983 __kmp_sys_max_nth = INT_MAX;1984 } else if (__kmp_sys_max_nth <= 1) {1985 /* Can't tell, just use PTHREAD_THREADS_MAX */1986 __kmp_sys_max_nth = KMP_MAX_NTH;1987 }1988#endif1989 1990 /* Query the minimum stack size */1991 __kmp_sys_min_stksize = sysconf(_SC_THREAD_STACK_MIN);1992 if (__kmp_sys_min_stksize <= 1) {1993 __kmp_sys_min_stksize = KMP_MIN_STKSIZE;1994 }1995 }1996 1997 /* Set up minimum number of threads to switch to TLS gtid */1998 __kmp_tls_gtid_min = KMP_TLS_GTID_MIN;1999 2000 status = pthread_key_create(&__kmp_gtid_threadprivate_key,2001 __kmp_internal_end_dest);2002 KMP_CHECK_SYSFAIL("pthread_key_create", status);2003 status = pthread_mutexattr_init(&mutex_attr);2004 KMP_CHECK_SYSFAIL("pthread_mutexattr_init", status);2005 status = pthread_mutex_init(&__kmp_wait_mx.m_mutex, &mutex_attr);2006 KMP_CHECK_SYSFAIL("pthread_mutex_init", status);2007 status = pthread_mutexattr_destroy(&mutex_attr);2008 KMP_CHECK_SYSFAIL("pthread_mutexattr_destroy", status);2009 status = pthread_condattr_init(&cond_attr);2010 KMP_CHECK_SYSFAIL("pthread_condattr_init", status);2011 status = pthread_cond_init(&__kmp_wait_cv.c_cond, &cond_attr);2012 KMP_CHECK_SYSFAIL("pthread_cond_init", status);2013 status = pthread_condattr_destroy(&cond_attr);2014 KMP_CHECK_SYSFAIL("pthread_condattr_destroy", status);2015#if USE_ITT_BUILD2016 __kmp_itt_initialize();2017#endif /* USE_ITT_BUILD */2018 2019 __kmp_init_runtime = TRUE;2020}2021 2022void __kmp_runtime_destroy(void) {2023 int status;2024 2025 if (!__kmp_init_runtime) {2026 return; // Nothing to do.2027 }2028 2029#if USE_ITT_BUILD2030 __kmp_itt_destroy();2031#endif /* USE_ITT_BUILD */2032 2033 status = pthread_key_delete(__kmp_gtid_threadprivate_key);2034 KMP_CHECK_SYSFAIL("pthread_key_delete", status);2035 2036 status = pthread_mutex_destroy(&__kmp_wait_mx.m_mutex);2037 if (status != 0 && status != EBUSY) {2038 KMP_SYSFAIL("pthread_mutex_destroy", status);2039 }2040 status = pthread_cond_destroy(&__kmp_wait_cv.c_cond);2041 if (status != 0 && status != EBUSY) {2042 KMP_SYSFAIL("pthread_cond_destroy", status);2043 }2044#if KMP_AFFINITY_SUPPORTED2045 __kmp_affinity_uninitialize();2046#endif2047 2048 __kmp_init_runtime = FALSE;2049}2050 2051/* Put the thread to sleep for a time period */2052/* NOTE: not currently used anywhere */2053void __kmp_thread_sleep(int millis) { sleep((millis + 500) / 1000); }2054 2055/* Calculate the elapsed wall clock time for the user */2056void __kmp_elapsed(double *t) {2057 int status;2058#ifdef FIX_SGI_CLOCK2059 struct timespec ts;2060 2061 status = clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts);2062 KMP_CHECK_SYSFAIL_ERRNO("clock_gettime", status);2063 *t =2064 (double)ts.tv_nsec * (1.0 / (double)KMP_NSEC_PER_SEC) + (double)ts.tv_sec;2065#else2066 struct timeval tv;2067 2068 status = gettimeofday(&tv, NULL);2069 KMP_CHECK_SYSFAIL_ERRNO("gettimeofday", status);2070 *t =2071 (double)tv.tv_usec * (1.0 / (double)KMP_USEC_PER_SEC) + (double)tv.tv_sec;2072#endif2073}2074 2075/* Calculate the elapsed wall clock tick for the user */2076void __kmp_elapsed_tick(double *t) { *t = 1 / (double)CLOCKS_PER_SEC; }2077 2078/* Return the current time stamp in nsec */2079kmp_uint64 __kmp_now_nsec() {2080 struct timeval t;2081 gettimeofday(&t, NULL);2082 kmp_uint64 nsec = (kmp_uint64)KMP_NSEC_PER_SEC * (kmp_uint64)t.tv_sec +2083 (kmp_uint64)1000 * (kmp_uint64)t.tv_usec;2084 return nsec;2085}2086 2087#if KMP_ARCH_X86 || KMP_ARCH_X86_642088/* Measure clock ticks per millisecond */2089void __kmp_initialize_system_tick() {2090 kmp_uint64 now, nsec2, diff;2091 kmp_uint64 delay = 1000000; // ~450 usec on most machines.2092 kmp_uint64 nsec = __kmp_now_nsec();2093 kmp_uint64 goal = __kmp_hardware_timestamp() + delay;2094 while ((now = __kmp_hardware_timestamp()) < goal)2095 ;2096 nsec2 = __kmp_now_nsec();2097 diff = nsec2 - nsec;2098 if (diff > 0) {2099 double tpus = 1000.0 * (double)(delay + (now - goal)) / (double)diff;2100 if (tpus > 0.0) {2101 __kmp_ticks_per_msec = (kmp_uint64)(tpus * 1000.0);2102 __kmp_ticks_per_usec = (kmp_uint64)tpus;2103 }2104 }2105}2106#endif2107 2108/* Determine whether the given address is mapped into the current address2109 space. */2110 2111int __kmp_is_address_mapped(void *addr) {2112 2113 int found = 0;2114 int rc;2115 2116#if KMP_OS_LINUX || KMP_OS_HURD2117 2118 /* On GNUish OSes, read the /proc/<pid>/maps pseudo-file to get all the2119 address ranges mapped into the address space. */2120 2121 char *name = __kmp_str_format("/proc/%d/maps", getpid());2122 FILE *file = NULL;2123 2124 file = fopen(name, "r");2125 KMP_ASSERT(file != NULL);2126 2127 for (;;) {2128 2129 void *beginning = NULL;2130 void *ending = NULL;2131 char perms[5];2132 2133 rc = fscanf(file, "%p-%p %4s %*[^\n]\n", &beginning, &ending, perms);2134 if (rc == EOF) {2135 break;2136 }2137 KMP_ASSERT(rc == 3 &&2138 KMP_STRLEN(perms) == 4); // Make sure all fields are read.2139 2140 // Ending address is not included in the region, but beginning is.2141 if ((addr >= beginning) && (addr < ending)) {2142 perms[2] = 0; // 3th and 4th character does not matter.2143 if (strcmp(perms, "rw") == 0) {2144 // Memory we are looking for should be readable and writable.2145 found = 1;2146 }2147 break;2148 }2149 }2150 2151 // Free resources.2152 fclose(file);2153 KMP_INTERNAL_FREE(name);2154#elif KMP_OS_FREEBSD2155 char *buf;2156 size_t lstsz;2157 int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, getpid()};2158 rc = sysctl(mib, 4, NULL, &lstsz, NULL, 0);2159 if (rc < 0)2160 return 0;2161 // We pass from number of vm entry's semantic2162 // to size of whole entry map list.2163 lstsz = lstsz * 4 / 3;2164 buf = reinterpret_cast<char *>(KMP_INTERNAL_MALLOC(lstsz));2165 rc = sysctl(mib, 4, buf, &lstsz, NULL, 0);2166 if (rc < 0) {2167 KMP_INTERNAL_FREE(buf);2168 return 0;2169 }2170 2171 char *lw = buf;2172 char *up = buf + lstsz;2173 2174 while (lw < up) {2175 struct kinfo_vmentry *cur = reinterpret_cast<struct kinfo_vmentry *>(lw);2176 size_t cursz = cur->kve_structsize;2177 if (cursz == 0)2178 break;2179 void *start = reinterpret_cast<void *>(cur->kve_start);2180 void *end = reinterpret_cast<void *>(cur->kve_end);2181 // Readable/Writable addresses within current map entry2182 if ((addr >= start) && (addr < end)) {2183 if ((cur->kve_protection & KVME_PROT_READ) != 0 &&2184 (cur->kve_protection & KVME_PROT_WRITE) != 0) {2185 found = 1;2186 break;2187 }2188 }2189 lw += cursz;2190 }2191 KMP_INTERNAL_FREE(buf);2192#elif KMP_OS_DRAGONFLY2193 char err[_POSIX2_LINE_MAX];2194 kinfo_proc *proc;2195 vmspace sp;2196 vm_map *cur;2197 vm_map_entry entry, *c;2198 struct proc p;2199 kvm_t *fd;2200 uintptr_t uaddr;2201 int num;2202 2203 fd = kvm_openfiles(nullptr, nullptr, nullptr, O_RDONLY, err);2204 if (!fd) {2205 return 0;2206 }2207 2208 proc = kvm_getprocs(fd, KERN_PROC_PID, getpid(), &num);2209 2210 if (kvm_read(fd, static_cast<uintptr_t>(proc->kp_paddr), &p, sizeof(p)) !=2211 sizeof(p) ||2212 kvm_read(fd, reinterpret_cast<uintptr_t>(p.p_vmspace), &sp, sizeof(sp)) !=2213 sizeof(sp)) {2214 kvm_close(fd);2215 return 0;2216 }2217 2218 (void)rc;2219 cur = &sp.vm_map;2220 uaddr = reinterpret_cast<uintptr_t>(addr);2221 for (c = kvm_vm_map_entry_first(fd, cur, &entry); c;2222 c = kvm_vm_map_entry_next(fd, c, &entry)) {2223 if ((uaddr >= entry.ba.start) && (uaddr <= entry.ba.end)) {2224 if ((entry.protection & VM_PROT_READ) != 0 &&2225 (entry.protection & VM_PROT_WRITE) != 0) {2226 found = 1;2227 break;2228 }2229 }2230 }2231 2232 kvm_close(fd);2233#elif KMP_OS_SOLARIS2234 prxmap_t *cur, *map;2235 void *buf;2236 uintptr_t uaddr;2237 ssize_t rd;2238 int fd;2239 pid_t pid = getpid();2240 char *name = __kmp_str_format("/proc/%d/xmap", pid);2241 fd = open(name, O_RDONLY);2242 if (fd == -1) {2243 KMP_INTERNAL_FREE(name);2244 return 0;2245 }2246 2247 size_t sz = (1 << 20);2248 buf = KMP_INTERNAL_MALLOC(sz);2249 2250 while (sz > 0 && (rd = pread(fd, buf, sz, 0)) == sz) {2251 void *newbuf;2252 sz <<= 1;2253 newbuf = KMP_INTERNAL_REALLOC(buf, sz);2254 buf = newbuf;2255 }2256 2257 map = reinterpret_cast<prxmap_t *>(buf);2258 uaddr = reinterpret_cast<uintptr_t>(addr);2259 2260 for (cur = map; rd > 0; cur++, rd = -sizeof(*map)) {2261 if (uaddr >= cur->pr_vaddr && uaddr < cur->pr_vaddr) {2262 if ((cur->pr_mflags & MA_READ) != 0 && (cur->pr_mflags & MA_WRITE) != 0) {2263 found = 1;2264 break;2265 }2266 }2267 }2268 2269 KMP_INTERNAL_FREE(map);2270 close(fd);2271 KMP_INTERNAL_FREE(name);2272#elif KMP_OS_DARWIN2273 2274 /* On OS X*, /proc pseudo filesystem is not available. Try to read memory2275 using vm interface. */2276 2277 int buffer;2278 vm_size_t count;2279 rc = vm_read_overwrite(2280 mach_task_self(), // Task to read memory of.2281 (vm_address_t)(addr), // Address to read from.2282 1, // Number of bytes to be read.2283 (vm_address_t)(&buffer), // Address of buffer to save read bytes in.2284 &count // Address of var to save number of read bytes in.2285 );2286 if (rc == 0) {2287 // Memory successfully read.2288 found = 1;2289 }2290 2291#elif KMP_OS_NETBSD2292 2293 int mib[5];2294 mib[0] = CTL_VM;2295 mib[1] = VM_PROC;2296 mib[2] = VM_PROC_MAP;2297 mib[3] = getpid();2298 mib[4] = sizeof(struct kinfo_vmentry);2299 2300 size_t size;2301 rc = sysctl(mib, __arraycount(mib), NULL, &size, NULL, 0);2302 KMP_ASSERT(!rc);2303 KMP_ASSERT(size);2304 2305 size = size * 4 / 3;2306 struct kinfo_vmentry *kiv = (struct kinfo_vmentry *)KMP_INTERNAL_MALLOC(size);2307 KMP_ASSERT(kiv);2308 2309 rc = sysctl(mib, __arraycount(mib), kiv, &size, NULL, 0);2310 KMP_ASSERT(!rc);2311 KMP_ASSERT(size);2312 2313 for (size_t i = 0; i < size; i++) {2314 if (kiv[i].kve_start >= (uint64_t)addr &&2315 kiv[i].kve_end <= (uint64_t)addr) {2316 found = 1;2317 break;2318 }2319 }2320 KMP_INTERNAL_FREE(kiv);2321#elif KMP_OS_OPENBSD2322 2323 int mib[3];2324 mib[0] = CTL_KERN;2325 mib[1] = KERN_PROC_VMMAP;2326 mib[2] = getpid();2327 2328 size_t size;2329 uint64_t end;2330 rc = sysctl(mib, 3, NULL, &size, NULL, 0);2331 KMP_ASSERT(!rc);2332 KMP_ASSERT(size);2333 end = size;2334 2335 struct kinfo_vmentry kiv = {.kve_start = 0};2336 2337 while ((rc = sysctl(mib, 3, &kiv, &size, NULL, 0)) == 0) {2338 KMP_ASSERT(size);2339 if (kiv.kve_end == end)2340 break;2341 2342 if (kiv.kve_start >= (uint64_t)addr && kiv.kve_end <= (uint64_t)addr) {2343 found = 1;2344 break;2345 }2346 kiv.kve_start += 1;2347 }2348#elif KMP_OS_WASI2349 found = (int)addr < (__builtin_wasm_memory_size(0) * PAGESIZE);2350#elif KMP_OS_AIX2351 2352 uint32_t loadQueryBufSize = 4096u; // Default loadquery buffer size.2353 char *loadQueryBuf;2354 2355 for (;;) {2356 loadQueryBuf = (char *)KMP_INTERNAL_MALLOC(loadQueryBufSize);2357 if (loadQueryBuf == NULL) {2358 return 0;2359 }2360 2361 rc = loadquery(L_GETXINFO | L_IGNOREUNLOAD, loadQueryBuf, loadQueryBufSize);2362 if (rc < 0) {2363 KMP_INTERNAL_FREE(loadQueryBuf);2364 if (errno != ENOMEM) {2365 return 0;2366 }2367 // errno == ENOMEM; double the size.2368 loadQueryBufSize <<= 1;2369 continue;2370 }2371 // Obtained the load info successfully.2372 break;2373 }2374 2375 struct ld_xinfo *curLdInfo = (struct ld_xinfo *)loadQueryBuf;2376 2377 // Loop through the load info to find if there is a match.2378 for (;;) {2379 uintptr_t curDataStart = (uintptr_t)curLdInfo->ldinfo_dataorg;2380 uintptr_t curDataEnd = curDataStart + curLdInfo->ldinfo_datasize;2381 2382 // The data segment is readable and writable.2383 if (curDataStart <= (uintptr_t)addr && (uintptr_t)addr < curDataEnd) {2384 found = 1;2385 break;2386 }2387 if (curLdInfo->ldinfo_next == 0u) {2388 // Reached the end of load info.2389 break;2390 }2391 curLdInfo = (struct ld_xinfo *)((char *)curLdInfo + curLdInfo->ldinfo_next);2392 }2393 KMP_INTERNAL_FREE(loadQueryBuf);2394 2395#elif KMP_OS_HAIKU2396 2397 found = 1;2398#else2399 2400#error "Unknown or unsupported OS"2401 2402#endif2403 2404 return found;2405 2406} // __kmp_is_address_mapped2407 2408#ifdef USE_LOAD_BALANCE2409 2410#if KMP_OS_DARWIN || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD || \2411 KMP_OS_OPENBSD || KMP_OS_SOLARIS2412 2413// The function returns the rounded value of the system load average2414// during given time interval which depends on the value of2415// __kmp_load_balance_interval variable (default is 60 sec, other values2416// may be 300 sec or 900 sec).2417// It returns -1 in case of error.2418int __kmp_get_load_balance(int max) {2419 double averages[3];2420 int ret_avg = 0;2421 2422 int res = getloadavg(averages, 3);2423 2424 // Check __kmp_load_balance_interval to determine which of averages to use.2425 // getloadavg() may return the number of samples less than requested that is2426 // less than 3.2427 if (__kmp_load_balance_interval < 180 && (res >= 1)) {2428 ret_avg = (int)averages[0]; // 1 min2429 } else if ((__kmp_load_balance_interval >= 180 &&2430 __kmp_load_balance_interval < 600) &&2431 (res >= 2)) {2432 ret_avg = (int)averages[1]; // 5 min2433 } else if ((__kmp_load_balance_interval >= 600) && (res == 3)) {2434 ret_avg = (int)averages[2]; // 15 min2435 } else { // Error occurred2436 return -1;2437 }2438 2439 return ret_avg;2440}2441 2442#elif KMP_OS_AIX2443 2444// The function returns number of running (not sleeping) threads, or -1 in case2445// of error.2446int __kmp_get_load_balance(int max) {2447 2448 static int glb_running_threads = 0; // Saved count of the running threads for2449 // the thread balance algorithm.2450 static double glb_call_time = 0; // Thread balance algorithm call time.2451 int running_threads = 0; // Number of running threads in the system.2452 2453 double call_time = 0.0;2454 2455 __kmp_elapsed(&call_time);2456 2457 if (glb_call_time &&2458 (call_time - glb_call_time < __kmp_load_balance_interval))2459 return glb_running_threads;2460 2461 glb_call_time = call_time;2462 2463 if (max <= 0) {2464 max = INT_MAX;2465 }2466 2467 // Check how many perfstat_cpu_t structures are available.2468 int logical_cpus = perfstat_cpu(NULL, NULL, sizeof(perfstat_cpu_t), 0);2469 if (logical_cpus <= 0) {2470 glb_call_time = -1;2471 return -1;2472 }2473 2474 perfstat_cpu_t *cpu_stat = (perfstat_cpu_t *)KMP_INTERNAL_MALLOC(2475 logical_cpus * sizeof(perfstat_cpu_t));2476 if (cpu_stat == NULL) {2477 glb_call_time = -1;2478 return -1;2479 }2480 2481 // Set first CPU as the name of the first logical CPU for which the info is2482 // desired.2483 perfstat_id_t first_cpu_name;2484 strcpy(first_cpu_name.name, FIRST_CPU);2485 2486 // Get the stat info of logical CPUs.2487 int rc = perfstat_cpu(&first_cpu_name, cpu_stat, sizeof(perfstat_cpu_t),2488 logical_cpus);2489 KMP_DEBUG_ASSERT(rc == logical_cpus);2490 if (rc <= 0) {2491 KMP_INTERNAL_FREE(cpu_stat);2492 glb_call_time = -1;2493 return -1;2494 }2495 for (int i = 0; i < logical_cpus; ++i) {2496 running_threads += cpu_stat[i].runque;2497 if (running_threads >= max)2498 break;2499 }2500 2501 // There _might_ be a timing hole where the thread executing this2502 // code gets skipped in the load balance, and running_threads is 0.2503 // Assert in the debug builds only!!!2504 KMP_DEBUG_ASSERT(running_threads > 0);2505 if (running_threads <= 0)2506 running_threads = 1;2507 2508 KMP_INTERNAL_FREE(cpu_stat);2509 2510 glb_running_threads = running_threads;2511 2512 return running_threads;2513}2514 2515#else // Linux* OS2516 2517// The function returns number of running (not sleeping) threads, or -1 in case2518// of error. Error could be reported if Linux* OS kernel too old (without2519// "/proc" support). Counting running threads stops if max running threads2520// encountered.2521int __kmp_get_load_balance(int max) {2522 static int permanent_error = 0;2523 static int glb_running_threads = 0; // Saved count of the running threads for2524 // the thread balance algorithm2525 static double glb_call_time = 0; /* Thread balance algorithm call time */2526 2527 int running_threads = 0; // Number of running threads in the system.2528 2529 DIR *proc_dir = NULL; // Handle of "/proc/" directory.2530 struct dirent *proc_entry = NULL;2531 2532 kmp_str_buf_t task_path; // "/proc/<pid>/task/<tid>/" path.2533 DIR *task_dir = NULL; // Handle of "/proc/<pid>/task/<tid>/" directory.2534 struct dirent *task_entry = NULL;2535 int task_path_fixed_len;2536 2537 kmp_str_buf_t stat_path; // "/proc/<pid>/task/<tid>/stat" path.2538 int stat_file = -1;2539 int stat_path_fixed_len;2540 2541#ifdef KMP_DEBUG2542 int total_processes = 0; // Total number of processes in system.2543#endif2544 2545 double call_time = 0.0;2546 2547 __kmp_str_buf_init(&task_path);2548 __kmp_str_buf_init(&stat_path);2549 2550 __kmp_elapsed(&call_time);2551 2552 if (glb_call_time &&2553 (call_time - glb_call_time < __kmp_load_balance_interval)) {2554 running_threads = glb_running_threads;2555 goto finish;2556 }2557 2558 glb_call_time = call_time;2559 2560 // Do not spend time on scanning "/proc/" if we have a permanent error.2561 if (permanent_error) {2562 running_threads = -1;2563 goto finish;2564 }2565 2566 if (max <= 0) {2567 max = INT_MAX;2568 }2569 2570 // Open "/proc/" directory.2571 proc_dir = opendir("/proc");2572 if (proc_dir == NULL) {2573 // Cannot open "/proc/". Probably the kernel does not support it. Return an2574 // error now and in subsequent calls.2575 running_threads = -1;2576 permanent_error = 1;2577 goto finish;2578 }2579 2580 // Initialize fixed part of task_path. This part will not change.2581 __kmp_str_buf_cat(&task_path, "/proc/", 6);2582 task_path_fixed_len = task_path.used; // Remember number of used characters.2583 2584 proc_entry = readdir(proc_dir);2585 while (proc_entry != NULL) {2586 // Proc entry is a directory and name starts with a digit. Assume it is a2587 // process' directory.2588 if (proc_entry->d_type == DT_DIR && isdigit(proc_entry->d_name[0])) {2589 2590#ifdef KMP_DEBUG2591 ++total_processes;2592#endif2593 // Make sure init process is the very first in "/proc", so we can replace2594 // strcmp( proc_entry->d_name, "1" ) == 0 with simpler total_processes ==2595 // 1. We are going to check that total_processes == 1 => d_name == "1" is2596 // true (where "=>" is implication). Since C++ does not have => operator,2597 // let us replace it with its equivalent: a => b == ! a || b.2598 KMP_DEBUG_ASSERT(total_processes != 1 ||2599 strcmp(proc_entry->d_name, "1") == 0);2600 2601 // Construct task_path.2602 task_path.used = task_path_fixed_len; // Reset task_path to "/proc/".2603 __kmp_str_buf_cat(&task_path, proc_entry->d_name,2604 KMP_STRLEN(proc_entry->d_name));2605 __kmp_str_buf_cat(&task_path, "/task", 5);2606 2607 task_dir = opendir(task_path.str);2608 if (task_dir == NULL) {2609 // Process can finish between reading "/proc/" directory entry and2610 // opening process' "task/" directory. So, in general case we should not2611 // complain, but have to skip this process and read the next one. But on2612 // systems with no "task/" support we will spend lot of time to scan2613 // "/proc/" tree again and again without any benefit. "init" process2614 // (its pid is 1) should exist always, so, if we cannot open2615 // "/proc/1/task/" directory, it means "task/" is not supported by2616 // kernel. Report an error now and in the future.2617 if (strcmp(proc_entry->d_name, "1") == 0) {2618 running_threads = -1;2619 permanent_error = 1;2620 goto finish;2621 }2622 } else {2623 // Construct fixed part of stat file path.2624 __kmp_str_buf_clear(&stat_path);2625 __kmp_str_buf_cat(&stat_path, task_path.str, task_path.used);2626 __kmp_str_buf_cat(&stat_path, "/", 1);2627 stat_path_fixed_len = stat_path.used;2628 2629 task_entry = readdir(task_dir);2630 while (task_entry != NULL) {2631 // It is a directory and name starts with a digit.2632 if (proc_entry->d_type == DT_DIR && isdigit(task_entry->d_name[0])) {2633 2634 // Construct complete stat file path. Easiest way would be:2635 // __kmp_str_buf_print( & stat_path, "%s/%s/stat", task_path.str,2636 // task_entry->d_name );2637 // but seriae of __kmp_str_buf_cat works a bit faster.2638 stat_path.used =2639 stat_path_fixed_len; // Reset stat path to its fixed part.2640 __kmp_str_buf_cat(&stat_path, task_entry->d_name,2641 KMP_STRLEN(task_entry->d_name));2642 __kmp_str_buf_cat(&stat_path, "/stat", 5);2643 2644 // Note: Low-level API (open/read/close) is used. High-level API2645 // (fopen/fclose) works ~ 30 % slower.2646 stat_file = open(stat_path.str, O_RDONLY);2647 if (stat_file == -1) {2648 // We cannot report an error because task (thread) can terminate2649 // just before reading this file.2650 } else {2651 /* Content of "stat" file looks like:2652 24285 (program) S ...2653 2654 It is a single line (if program name does not include funny2655 symbols). First number is a thread id, then name of executable2656 file name in paretheses, then state of the thread. We need just2657 thread state.2658 2659 Good news: Length of program name is 15 characters max. Longer2660 names are truncated.2661 2662 Thus, we need rather short buffer: 15 chars for program name +2663 2 parenthesis, + 3 spaces + ~7 digits of pid = 37.2664 2665 Bad news: Program name may contain special symbols like space,2666 closing parenthesis, or even new line. This makes parsing2667 "stat" file not 100 % reliable. In case of fanny program names2668 parsing may fail (report incorrect thread state).2669 2670 Parsing "status" file looks more promissing (due to different2671 file structure and escaping special symbols) but reading and2672 parsing of "status" file works slower.2673 -- ln2674 */2675 char buffer[65];2676 ssize_t len;2677 len = read(stat_file, buffer, sizeof(buffer) - 1);2678 if (len >= 0) {2679 buffer[len] = 0;2680 // Using scanf:2681 // sscanf( buffer, "%*d (%*s) %c ", & state );2682 // looks very nice, but searching for a closing parenthesis2683 // works a bit faster.2684 char *close_parent = strstr(buffer, ") ");2685 if (close_parent != NULL) {2686 char state = *(close_parent + 2);2687 if (state == 'R') {2688 ++running_threads;2689 if (running_threads >= max) {2690 goto finish;2691 }2692 }2693 }2694 }2695 close(stat_file);2696 stat_file = -1;2697 }2698 }2699 task_entry = readdir(task_dir);2700 }2701 closedir(task_dir);2702 task_dir = NULL;2703 }2704 }2705 proc_entry = readdir(proc_dir);2706 }2707 2708 // There _might_ be a timing hole where the thread executing this2709 // code get skipped in the load balance, and running_threads is 0.2710 // Assert in the debug builds only!!!2711 KMP_DEBUG_ASSERT(running_threads > 0);2712 if (running_threads <= 0) {2713 running_threads = 1;2714 }2715 2716finish: // Clean up and exit.2717 if (proc_dir != NULL) {2718 closedir(proc_dir);2719 }2720 __kmp_str_buf_free(&task_path);2721 if (task_dir != NULL) {2722 closedir(task_dir);2723 }2724 __kmp_str_buf_free(&stat_path);2725 if (stat_file != -1) {2726 close(stat_file);2727 }2728 2729 glb_running_threads = running_threads;2730 2731 return running_threads;2732 2733} // __kmp_get_load_balance2734 2735#endif // KMP_OS_DARWIN2736 2737#endif // USE_LOAD_BALANCE2738 2739#if !(KMP_ARCH_X86 || KMP_ARCH_X86_64 || KMP_MIC || KMP_ARCH_AARCH64 || \2740 KMP_ARCH_PPC64 || KMP_ARCH_RISCV64 || KMP_ARCH_LOONGARCH64 || \2741 KMP_ARCH_ARM || KMP_ARCH_VE || KMP_ARCH_S390X || KMP_ARCH_PPC_XCOFF || \2742 KMP_ARCH_AARCH64_32)2743 2744// Because WebAssembly will use `call_indirect` to invoke the microtask and2745// WebAssembly indirect calls check that the called signature is a precise2746// match, we need to cast each microtask function pointer back from `void *` to2747// its original type.2748typedef void (*microtask_t0)(int *, int *);2749typedef void (*microtask_t1)(int *, int *, void *);2750typedef void (*microtask_t2)(int *, int *, void *, void *);2751typedef void (*microtask_t3)(int *, int *, void *, void *, void *);2752typedef void (*microtask_t4)(int *, int *, void *, void *, void *, void *);2753typedef void (*microtask_t5)(int *, int *, void *, void *, void *, void *,2754 void *);2755typedef void (*microtask_t6)(int *, int *, void *, void *, void *, void *,2756 void *, void *);2757typedef void (*microtask_t7)(int *, int *, void *, void *, void *, void *,2758 void *, void *, void *);2759typedef void (*microtask_t8)(int *, int *, void *, void *, void *, void *,2760 void *, void *, void *, void *);2761typedef void (*microtask_t9)(int *, int *, void *, void *, void *, void *,2762 void *, void *, void *, void *, void *);2763typedef void (*microtask_t10)(int *, int *, void *, void *, void *, void *,2764 void *, void *, void *, void *, void *, void *);2765typedef void (*microtask_t11)(int *, int *, void *, void *, void *, void *,2766 void *, void *, void *, void *, void *, void *,2767 void *);2768typedef void (*microtask_t12)(int *, int *, void *, void *, void *, void *,2769 void *, void *, void *, void *, void *, void *,2770 void *, void *);2771typedef void (*microtask_t13)(int *, int *, void *, void *, void *, void *,2772 void *, void *, void *, void *, void *, void *,2773 void *, void *, void *);2774typedef void (*microtask_t14)(int *, int *, void *, void *, void *, void *,2775 void *, void *, void *, void *, void *, void *,2776 void *, void *, void *, void *);2777typedef void (*microtask_t15)(int *, int *, void *, void *, void *, void *,2778 void *, void *, void *, void *, void *, void *,2779 void *, void *, void *, void *, void *);2780 2781// we really only need the case with 1 argument, because CLANG always build2782// a struct of pointers to shared variables referenced in the outlined function2783int __kmp_invoke_microtask(microtask_t pkfn, int gtid, int tid, int argc,2784 void *p_argv[]2785#if OMPT_SUPPORT2786 ,2787 void **exit_frame_ptr2788#endif2789) {2790#if OMPT_SUPPORT2791 *exit_frame_ptr = OMPT_GET_FRAME_ADDRESS(0);2792#endif2793 2794 switch (argc) {2795 default:2796 fprintf(stderr, "Too many args to microtask: %d!\n", argc);2797 fflush(stderr);2798 exit(-1);2799 case 0:2800 (*(microtask_t0)pkfn)(>id, &tid);2801 break;2802 case 1:2803 (*(microtask_t1)pkfn)(>id, &tid, p_argv[0]);2804 break;2805 case 2:2806 (*(microtask_t2)pkfn)(>id, &tid, p_argv[0], p_argv[1]);2807 break;2808 case 3:2809 (*(microtask_t3)pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2]);2810 break;2811 case 4:2812 (*(microtask_t4)pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2],2813 p_argv[3]);2814 break;2815 case 5:2816 (*(microtask_t5)pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2],2817 p_argv[3], p_argv[4]);2818 break;2819 case 6:2820 (*(microtask_t6)pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2],2821 p_argv[3], p_argv[4], p_argv[5]);2822 break;2823 case 7:2824 (*(microtask_t7)pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2],2825 p_argv[3], p_argv[4], p_argv[5], p_argv[6]);2826 break;2827 case 8:2828 (*(microtask_t8)pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2],2829 p_argv[3], p_argv[4], p_argv[5], p_argv[6],2830 p_argv[7]);2831 break;2832 case 9:2833 (*(microtask_t9)pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2],2834 p_argv[3], p_argv[4], p_argv[5], p_argv[6], p_argv[7],2835 p_argv[8]);2836 break;2837 case 10:2838 (*(microtask_t10)pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2],2839 p_argv[3], p_argv[4], p_argv[5], p_argv[6],2840 p_argv[7], p_argv[8], p_argv[9]);2841 break;2842 case 11:2843 (*(microtask_t11)pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2],2844 p_argv[3], p_argv[4], p_argv[5], p_argv[6],2845 p_argv[7], p_argv[8], p_argv[9], p_argv[10]);2846 break;2847 case 12:2848 (*(microtask_t12)pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2],2849 p_argv[3], p_argv[4], p_argv[5], p_argv[6],2850 p_argv[7], p_argv[8], p_argv[9], p_argv[10],2851 p_argv[11]);2852 break;2853 case 13:2854 (*(microtask_t13)pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2],2855 p_argv[3], p_argv[4], p_argv[5], p_argv[6],2856 p_argv[7], p_argv[8], p_argv[9], p_argv[10],2857 p_argv[11], p_argv[12]);2858 break;2859 case 14:2860 (*(microtask_t14)pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2],2861 p_argv[3], p_argv[4], p_argv[5], p_argv[6],2862 p_argv[7], p_argv[8], p_argv[9], p_argv[10],2863 p_argv[11], p_argv[12], p_argv[13]);2864 break;2865 case 15:2866 (*(microtask_t15)pkfn)(>id, &tid, p_argv[0], p_argv[1], p_argv[2],2867 p_argv[3], p_argv[4], p_argv[5], p_argv[6],2868 p_argv[7], p_argv[8], p_argv[9], p_argv[10],2869 p_argv[11], p_argv[12], p_argv[13], p_argv[14]);2870 break;2871 }2872 2873 return 1;2874}2875 2876#endif2877 2878#if KMP_OS_LINUX2879// Functions for hidden helper task2880namespace {2881// Condition variable for initializing hidden helper team2882pthread_cond_t hidden_helper_threads_initz_cond_var;2883pthread_mutex_t hidden_helper_threads_initz_lock;2884volatile int hidden_helper_initz_signaled = FALSE;2885 2886// Condition variable for deinitializing hidden helper team2887pthread_cond_t hidden_helper_threads_deinitz_cond_var;2888pthread_mutex_t hidden_helper_threads_deinitz_lock;2889volatile int hidden_helper_deinitz_signaled = FALSE;2890 2891// Condition variable for the wrapper function of main thread2892pthread_cond_t hidden_helper_main_thread_cond_var;2893pthread_mutex_t hidden_helper_main_thread_lock;2894volatile int hidden_helper_main_thread_signaled = FALSE;2895 2896// Semaphore for worker threads. We don't use condition variable here in case2897// that when multiple signals are sent at the same time, only one thread might2898// be waken.2899sem_t hidden_helper_task_sem;2900} // namespace2901 2902void __kmp_hidden_helper_worker_thread_wait() {2903 int status = sem_wait(&hidden_helper_task_sem);2904 KMP_CHECK_SYSFAIL("sem_wait", status);2905}2906 2907void __kmp_do_initialize_hidden_helper_threads() {2908 // Initialize condition variable2909 int status =2910 pthread_cond_init(&hidden_helper_threads_initz_cond_var, nullptr);2911 KMP_CHECK_SYSFAIL("pthread_cond_init", status);2912 2913 status = pthread_cond_init(&hidden_helper_threads_deinitz_cond_var, nullptr);2914 KMP_CHECK_SYSFAIL("pthread_cond_init", status);2915 2916 status = pthread_cond_init(&hidden_helper_main_thread_cond_var, nullptr);2917 KMP_CHECK_SYSFAIL("pthread_cond_init", status);2918 2919 status = pthread_mutex_init(&hidden_helper_threads_initz_lock, nullptr);2920 KMP_CHECK_SYSFAIL("pthread_mutex_init", status);2921 2922 status = pthread_mutex_init(&hidden_helper_threads_deinitz_lock, nullptr);2923 KMP_CHECK_SYSFAIL("pthread_mutex_init", status);2924 2925 status = pthread_mutex_init(&hidden_helper_main_thread_lock, nullptr);2926 KMP_CHECK_SYSFAIL("pthread_mutex_init", status);2927 2928 // Initialize the semaphore2929 status = sem_init(&hidden_helper_task_sem, 0, 0);2930 KMP_CHECK_SYSFAIL("sem_init", status);2931 2932 // Create a new thread to finish initialization2933 pthread_t handle;2934 status = pthread_create(2935 &handle, nullptr,2936 [](void *) -> void * {2937 __kmp_hidden_helper_threads_initz_routine();2938 return nullptr;2939 },2940 nullptr);2941 KMP_CHECK_SYSFAIL("pthread_create", status);2942}2943 2944void __kmp_hidden_helper_threads_initz_wait() {2945 // Initial thread waits here for the completion of the initialization. The2946 // condition variable will be notified by main thread of hidden helper teams.2947 int status = pthread_mutex_lock(&hidden_helper_threads_initz_lock);2948 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status);2949 2950 if (!TCR_4(hidden_helper_initz_signaled)) {2951 status = pthread_cond_wait(&hidden_helper_threads_initz_cond_var,2952 &hidden_helper_threads_initz_lock);2953 KMP_CHECK_SYSFAIL("pthread_cond_wait", status);2954 }2955 2956 status = pthread_mutex_unlock(&hidden_helper_threads_initz_lock);2957 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status);2958}2959 2960void __kmp_hidden_helper_initz_release() {2961 // After all initialization, reset __kmp_init_hidden_helper_threads to false.2962 int status = pthread_mutex_lock(&hidden_helper_threads_initz_lock);2963 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status);2964 2965 status = pthread_cond_signal(&hidden_helper_threads_initz_cond_var);2966 KMP_CHECK_SYSFAIL("pthread_cond_wait", status);2967 2968 TCW_SYNC_4(hidden_helper_initz_signaled, TRUE);2969 2970 status = pthread_mutex_unlock(&hidden_helper_threads_initz_lock);2971 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status);2972}2973 2974void __kmp_hidden_helper_main_thread_wait() {2975 // The main thread of hidden helper team will be blocked here. The2976 // condition variable can only be signal in the destructor of RTL.2977 int status = pthread_mutex_lock(&hidden_helper_main_thread_lock);2978 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status);2979 2980 if (!TCR_4(hidden_helper_main_thread_signaled)) {2981 status = pthread_cond_wait(&hidden_helper_main_thread_cond_var,2982 &hidden_helper_main_thread_lock);2983 KMP_CHECK_SYSFAIL("pthread_cond_wait", status);2984 }2985 2986 status = pthread_mutex_unlock(&hidden_helper_main_thread_lock);2987 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status);2988}2989 2990void __kmp_hidden_helper_main_thread_release() {2991 // The initial thread of OpenMP RTL should call this function to wake up the2992 // main thread of hidden helper team.2993 int status = pthread_mutex_lock(&hidden_helper_main_thread_lock);2994 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status);2995 2996 status = pthread_cond_signal(&hidden_helper_main_thread_cond_var);2997 KMP_CHECK_SYSFAIL("pthread_cond_signal", status);2998 2999 // The hidden helper team is done here3000 TCW_SYNC_4(hidden_helper_main_thread_signaled, TRUE);3001 3002 status = pthread_mutex_unlock(&hidden_helper_main_thread_lock);3003 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status);3004}3005 3006void __kmp_hidden_helper_worker_thread_signal() {3007 int status = sem_post(&hidden_helper_task_sem);3008 KMP_CHECK_SYSFAIL("sem_post", status);3009}3010 3011void __kmp_hidden_helper_threads_deinitz_wait() {3012 // Initial thread waits here for the completion of the deinitialization. The3013 // condition variable will be notified by main thread of hidden helper teams.3014 int status = pthread_mutex_lock(&hidden_helper_threads_deinitz_lock);3015 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status);3016 3017 if (!TCR_4(hidden_helper_deinitz_signaled)) {3018 status = pthread_cond_wait(&hidden_helper_threads_deinitz_cond_var,3019 &hidden_helper_threads_deinitz_lock);3020 KMP_CHECK_SYSFAIL("pthread_cond_wait", status);3021 }3022 3023 status = pthread_mutex_unlock(&hidden_helper_threads_deinitz_lock);3024 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status);3025}3026 3027void __kmp_hidden_helper_threads_deinitz_release() {3028 int status = pthread_mutex_lock(&hidden_helper_threads_deinitz_lock);3029 KMP_CHECK_SYSFAIL("pthread_mutex_lock", status);3030 3031 status = pthread_cond_signal(&hidden_helper_threads_deinitz_cond_var);3032 KMP_CHECK_SYSFAIL("pthread_cond_wait", status);3033 3034 TCW_SYNC_4(hidden_helper_deinitz_signaled, TRUE);3035 3036 status = pthread_mutex_unlock(&hidden_helper_threads_deinitz_lock);3037 KMP_CHECK_SYSFAIL("pthread_mutex_unlock", status);3038}3039#else // KMP_OS_LINUX3040void __kmp_hidden_helper_worker_thread_wait() {3041 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS");3042}3043 3044void __kmp_do_initialize_hidden_helper_threads() {3045 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS");3046}3047 3048void __kmp_hidden_helper_threads_initz_wait() {3049 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS");3050}3051 3052void __kmp_hidden_helper_initz_release() {3053 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS");3054}3055 3056void __kmp_hidden_helper_main_thread_wait() {3057 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS");3058}3059 3060void __kmp_hidden_helper_main_thread_release() {3061 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS");3062}3063 3064void __kmp_hidden_helper_worker_thread_signal() {3065 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS");3066}3067 3068void __kmp_hidden_helper_threads_deinitz_wait() {3069 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS");3070}3071 3072void __kmp_hidden_helper_threads_deinitz_release() {3073 KMP_ASSERT(0 && "Hidden helper task is not supported on this OS");3074}3075#endif // KMP_OS_LINUX3076 3077bool __kmp_detect_shm() {3078 DIR *dir = opendir("/dev/shm");3079 if (dir) { // /dev/shm exists3080 closedir(dir);3081 return true;3082 } else if (ENOENT == errno) { // /dev/shm does not exist3083 return false;3084 } else { // opendir() failed3085 return false;3086 }3087}3088 3089bool __kmp_detect_tmp() {3090 DIR *dir = opendir("/tmp");3091 if (dir) { // /tmp exists3092 closedir(dir);3093 return true;3094 } else if (ENOENT == errno) { // /tmp does not exist3095 return false;3096 } else { // opendir() failed3097 return false;3098 }3099}3100 3101// end of file //3102