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Run DCE after a LoopFlatten test to reduce spurious output [nfc]
[llvm-project.git] / openmp / runtime / src / z_Windows_NT_util.cpp
blob9e264ab45b87f0c4700935416a07fee72297ae4a
1 /*
2 * z_Windows_NT_util.cpp -- platform specific routines.
3 */
4
5 //===----------------------------------------------------------------------===//
6 //
7 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
8 // See https://llvm.org/LICENSE.txt for license information.
9 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include "kmp.h"
14 #include "kmp_affinity.h"
15 #include "kmp_i18n.h"
16 #include "kmp_io.h"
17 #include "kmp_itt.h"
18 #include "kmp_wait_release.h"
19
20 /* This code is related to NtQuerySystemInformation() function. This function
21 is used in the Load balance algorithm for OMP_DYNAMIC=true to find the
22 number of running threads in the system. */
23
24 #include <ntsecapi.h> // UNICODE_STRING
25 #include <ntstatus.h>
26 #include <psapi.h>
27 #ifdef _MSC_VER
28 #pragma comment(lib, "psapi.lib")
29 #endif
30
31 enum SYSTEM_INFORMATION_CLASS {
32 SystemProcessInformation = 5
33 }; // SYSTEM_INFORMATION_CLASS
34
35 struct CLIENT_ID {
36 HANDLE UniqueProcess;
37 HANDLE UniqueThread;
38 }; // struct CLIENT_ID
39
40 enum THREAD_STATE {
41 StateInitialized,
42 StateReady,
43 StateRunning,
44 StateStandby,
45 StateTerminated,
46 StateWait,
47 StateTransition,
48 StateUnknown
49 }; // enum THREAD_STATE
50
51 struct VM_COUNTERS {
52 SIZE_T PeakVirtualSize;
53 SIZE_T VirtualSize;
54 ULONG PageFaultCount;
55 SIZE_T PeakWorkingSetSize;
56 SIZE_T WorkingSetSize;
57 SIZE_T QuotaPeakPagedPoolUsage;
58 SIZE_T QuotaPagedPoolUsage;
59 SIZE_T QuotaPeakNonPagedPoolUsage;
60 SIZE_T QuotaNonPagedPoolUsage;
61 SIZE_T PagefileUsage;
62 SIZE_T PeakPagefileUsage;
63 SIZE_T PrivatePageCount;
64 }; // struct VM_COUNTERS
65
66 struct SYSTEM_THREAD {
67 LARGE_INTEGER KernelTime;
68 LARGE_INTEGER UserTime;
69 LARGE_INTEGER CreateTime;
70 ULONG WaitTime;
71 LPVOID StartAddress;
72 CLIENT_ID ClientId;
73 DWORD Priority;
74 LONG BasePriority;
75 ULONG ContextSwitchCount;
76 THREAD_STATE State;
77 ULONG WaitReason;
78 }; // SYSTEM_THREAD
79
80 KMP_BUILD_ASSERT(offsetof(SYSTEM_THREAD, KernelTime) == 0);
81 #if KMP_ARCH_X86 || KMP_ARCH_ARM
82 KMP_BUILD_ASSERT(offsetof(SYSTEM_THREAD, StartAddress) == 28);
83 KMP_BUILD_ASSERT(offsetof(SYSTEM_THREAD, State) == 52);
84 #else
85 KMP_BUILD_ASSERT(offsetof(SYSTEM_THREAD, StartAddress) == 32);
86 KMP_BUILD_ASSERT(offsetof(SYSTEM_THREAD, State) == 68);
87 #endif
88
89 struct SYSTEM_PROCESS_INFORMATION {
90 ULONG NextEntryOffset;
91 ULONG NumberOfThreads;
92 LARGE_INTEGER Reserved[3];
93 LARGE_INTEGER CreateTime;
94 LARGE_INTEGER UserTime;
95 LARGE_INTEGER KernelTime;
96 UNICODE_STRING ImageName;
97 DWORD BasePriority;
98 HANDLE ProcessId;
99 HANDLE ParentProcessId;
100 ULONG HandleCount;
101 ULONG Reserved2[2];
102 VM_COUNTERS VMCounters;
103 IO_COUNTERS IOCounters;
104 SYSTEM_THREAD Threads[1];
105 }; // SYSTEM_PROCESS_INFORMATION
106 typedef SYSTEM_PROCESS_INFORMATION *PSYSTEM_PROCESS_INFORMATION;
107
108 KMP_BUILD_ASSERT(offsetof(SYSTEM_PROCESS_INFORMATION, NextEntryOffset) == 0);
109 KMP_BUILD_ASSERT(offsetof(SYSTEM_PROCESS_INFORMATION, CreateTime) == 32);
110 KMP_BUILD_ASSERT(offsetof(SYSTEM_PROCESS_INFORMATION, ImageName) == 56);
111 #if KMP_ARCH_X86 || KMP_ARCH_ARM
112 KMP_BUILD_ASSERT(offsetof(SYSTEM_PROCESS_INFORMATION, ProcessId) == 68);
113 KMP_BUILD_ASSERT(offsetof(SYSTEM_PROCESS_INFORMATION, HandleCount) == 76);
114 KMP_BUILD_ASSERT(offsetof(SYSTEM_PROCESS_INFORMATION, VMCounters) == 88);
115 KMP_BUILD_ASSERT(offsetof(SYSTEM_PROCESS_INFORMATION, IOCounters) == 136);
116 KMP_BUILD_ASSERT(offsetof(SYSTEM_PROCESS_INFORMATION, Threads) == 184);
117 #else
118 KMP_BUILD_ASSERT(offsetof(SYSTEM_PROCESS_INFORMATION, ProcessId) == 80);
119 KMP_BUILD_ASSERT(offsetof(SYSTEM_PROCESS_INFORMATION, HandleCount) == 96);
120 KMP_BUILD_ASSERT(offsetof(SYSTEM_PROCESS_INFORMATION, VMCounters) == 112);
121 KMP_BUILD_ASSERT(offsetof(SYSTEM_PROCESS_INFORMATION, IOCounters) == 208);
122 KMP_BUILD_ASSERT(offsetof(SYSTEM_PROCESS_INFORMATION, Threads) == 256);
123 #endif
124
125 typedef NTSTATUS(NTAPI *NtQuerySystemInformation_t)(SYSTEM_INFORMATION_CLASS,
126 PVOID, ULONG, PULONG);
127 NtQuerySystemInformation_t NtQuerySystemInformation = NULL;
128
129 HMODULE ntdll = NULL;
130
131 /* End of NtQuerySystemInformation()-related code */
132
133 static HMODULE kernel32 = NULL;
134
135 #if KMP_HANDLE_SIGNALS
136 typedef void (*sig_func_t)(int);
137 static sig_func_t __kmp_sighldrs[NSIG];
138 static int __kmp_siginstalled[NSIG];
139 #endif
140
141 #if KMP_USE_MONITOR
142 static HANDLE __kmp_monitor_ev;
143 #endif
144 static kmp_int64 __kmp_win32_time;
145 double __kmp_win32_tick;
146
147 int __kmp_init_runtime = FALSE;
148 CRITICAL_SECTION __kmp_win32_section;
149
150 void __kmp_win32_mutex_init(kmp_win32_mutex_t *mx) {
151 InitializeCriticalSection(&mx->cs);
152 #if USE_ITT_BUILD
153 __kmp_itt_system_object_created(&mx->cs, "Critical Section");
154 #endif /* USE_ITT_BUILD */
155 }
156
157 void __kmp_win32_mutex_destroy(kmp_win32_mutex_t *mx) {
158 DeleteCriticalSection(&mx->cs);
159 }
160
161 void __kmp_win32_mutex_lock(kmp_win32_mutex_t *mx) {
162 EnterCriticalSection(&mx->cs);
163 }
164
165 int __kmp_win32_mutex_trylock(kmp_win32_mutex_t *mx) {
166 return TryEnterCriticalSection(&mx->cs);
167 }
168
169 void __kmp_win32_mutex_unlock(kmp_win32_mutex_t *mx) {
170 LeaveCriticalSection(&mx->cs);
171 }
172
173 void __kmp_win32_cond_init(kmp_win32_cond_t *cv) {
174 cv->waiters_count_ = 0;
175 cv->wait_generation_count_ = 0;
176 cv->release_count_ = 0;
177
178 /* Initialize the critical section */
179 __kmp_win32_mutex_init(&cv->waiters_count_lock_);
180
181 /* Create a manual-reset event. */
182 cv->event_ = CreateEvent(NULL, // no security
183 TRUE, // manual-reset
184 FALSE, // non-signaled initially
185 NULL); // unnamed
186 #if USE_ITT_BUILD
187 __kmp_itt_system_object_created(cv->event_, "Event");
188 #endif /* USE_ITT_BUILD */
189 }
190
191 void __kmp_win32_cond_destroy(kmp_win32_cond_t *cv) {
192 __kmp_win32_mutex_destroy(&cv->waiters_count_lock_);
193 __kmp_free_handle(cv->event_);
194 memset(cv, '\0', sizeof(*cv));
195 }
196
197 /* TODO associate cv with a team instead of a thread so as to optimize
198 the case where we wake up a whole team */
199
200 template <class C>
201 static void __kmp_win32_cond_wait(kmp_win32_cond_t *cv, kmp_win32_mutex_t *mx,
202 kmp_info_t *th, C *flag) {
203 int my_generation;
204 int last_waiter;
205
206 /* Avoid race conditions */
207 __kmp_win32_mutex_lock(&cv->waiters_count_lock_);
208
209 /* Increment count of waiters */
210 cv->waiters_count_++;
211
212 /* Store current generation in our activation record. */
213 my_generation = cv->wait_generation_count_;
214
215 __kmp_win32_mutex_unlock(&cv->waiters_count_lock_);
216 __kmp_win32_mutex_unlock(mx);
217
218 for (;;) {
219 int wait_done = 0;
220 DWORD res, timeout = 5000; // just tried to quess an appropriate number
221 /* Wait until the event is signaled */
222 res = WaitForSingleObject(cv->event_, timeout);
223
224 if (res == WAIT_OBJECT_0) {
225 // event signaled
226 __kmp_win32_mutex_lock(&cv->waiters_count_lock_);
227 /* Exit the loop when the <cv->event_> is signaled and there are still
228 waiting threads from this <wait_generation> that haven't been released
229 from this wait yet. */
230 wait_done = (cv->release_count_ > 0) &&
231 (cv->wait_generation_count_ != my_generation);
232 __kmp_win32_mutex_unlock(&cv->waiters_count_lock_);
233 } else if (res == WAIT_TIMEOUT || res == WAIT_FAILED) {
234 // check if the flag and cv counters are in consistent state
235 // as MS sent us debug dump whith inconsistent state of data
236 __kmp_win32_mutex_lock(mx);
237 typename C::flag_t old_f = flag->set_sleeping();
238 if (!flag->done_check_val(old_f & ~KMP_BARRIER_SLEEP_STATE)) {
239 __kmp_win32_mutex_unlock(mx);
240 continue;
241 }
242 // condition fulfilled, exiting
243 flag->unset_sleeping();
244 TCW_PTR(th->th.th_sleep_loc, NULL);
245 th->th.th_sleep_loc_type = flag_unset;
246 KF_TRACE(50, ("__kmp_win32_cond_wait: exiting, condition "
247 "fulfilled: flag's loc(%p): %u\n",
248 flag->get(), (unsigned int)flag->load()));
249
250 __kmp_win32_mutex_lock(&cv->waiters_count_lock_);
251 KMP_DEBUG_ASSERT(cv->waiters_count_ > 0);
252 cv->release_count_ = cv->waiters_count_;
253 cv->wait_generation_count_++;
254 wait_done = 1;
255 __kmp_win32_mutex_unlock(&cv->waiters_count_lock_);
256
257 __kmp_win32_mutex_unlock(mx);
258 }
259 /* there used to be a semicolon after the if statement, it looked like a
260 bug, so i removed it */
261 if (wait_done)
262 break;
263 }
264
265 __kmp_win32_mutex_lock(mx);
266 __kmp_win32_mutex_lock(&cv->waiters_count_lock_);
267
268 cv->waiters_count_--;
269 cv->release_count_--;
270
271 last_waiter = (cv->release_count_ == 0);
272
273 __kmp_win32_mutex_unlock(&cv->waiters_count_lock_);
274
275 if (last_waiter) {
276 /* We're the last waiter to be notified, so reset the manual event. */
277 ResetEvent(cv->event_);
278 }
279 }
280
281 void __kmp_win32_cond_broadcast(kmp_win32_cond_t *cv) {
282 __kmp_win32_mutex_lock(&cv->waiters_count_lock_);
283
284 if (cv->waiters_count_ > 0) {
285 SetEvent(cv->event_);
286 /* Release all the threads in this generation. */
287
288 cv->release_count_ = cv->waiters_count_;
289
290 /* Start a new generation. */
291 cv->wait_generation_count_++;
292 }
293
294 __kmp_win32_mutex_unlock(&cv->waiters_count_lock_);
295 }
296
297 void __kmp_win32_cond_signal(kmp_win32_cond_t *cv) {
298 __kmp_win32_cond_broadcast(cv);
299 }
300
301 void __kmp_enable(int new_state) {
302 if (__kmp_init_runtime)
303 LeaveCriticalSection(&__kmp_win32_section);
304 }
305
306 void __kmp_disable(int *old_state) {
307 *old_state = 0;
308
309 if (__kmp_init_runtime)
310 EnterCriticalSection(&__kmp_win32_section);
311 }
312
313 void __kmp_suspend_initialize(void) { /* do nothing */
314 }
315
316 void __kmp_suspend_initialize_thread(kmp_info_t *th) {
317 int old_value = KMP_ATOMIC_LD_RLX(&th->th.th_suspend_init);
318 int new_value = TRUE;
319 // Return if already initialized
320 if (old_value == new_value)
321 return;
322 // Wait, then return if being initialized
323 if (old_value == -1 ||
324 !__kmp_atomic_compare_store(&th->th.th_suspend_init, old_value, -1)) {
325 while (KMP_ATOMIC_LD_ACQ(&th->th.th_suspend_init) != new_value) {
326 KMP_CPU_PAUSE();
327 }
328 } else {
329 // Claim to be the initializer and do initializations
330 __kmp_win32_cond_init(&th->th.th_suspend_cv);
331 __kmp_win32_mutex_init(&th->th.th_suspend_mx);
332 KMP_ATOMIC_ST_REL(&th->th.th_suspend_init, new_value);
333 }
334 }
335
336 void __kmp_suspend_uninitialize_thread(kmp_info_t *th) {
337 if (KMP_ATOMIC_LD_ACQ(&th->th.th_suspend_init)) {
338 /* this means we have initialize the suspension pthread objects for this
339 thread in this instance of the process */
340 __kmp_win32_cond_destroy(&th->th.th_suspend_cv);
341 __kmp_win32_mutex_destroy(&th->th.th_suspend_mx);
342 KMP_ATOMIC_ST_REL(&th->th.th_suspend_init, FALSE);
343 }
344 }
345
346 int __kmp_try_suspend_mx(kmp_info_t *th) {
347 return __kmp_win32_mutex_trylock(&th->th.th_suspend_mx);
348 }
349
350 void __kmp_lock_suspend_mx(kmp_info_t *th) {
351 __kmp_win32_mutex_lock(&th->th.th_suspend_mx);
352 }
353
354 void __kmp_unlock_suspend_mx(kmp_info_t *th) {
355 __kmp_win32_mutex_unlock(&th->th.th_suspend_mx);
356 }
357
358 /* This routine puts the calling thread to sleep after setting the
359 sleep bit for the indicated flag variable to true. */
360 template <class C>
361 static inline void __kmp_suspend_template(int th_gtid, C *flag) {
362 kmp_info_t *th = __kmp_threads[th_gtid];
363 typename C::flag_t old_spin;
364
365 KF_TRACE(30, ("__kmp_suspend_template: T#%d enter for flag's loc(%p)\n",
366 th_gtid, flag->get()));
367
368 __kmp_suspend_initialize_thread(th);
369 __kmp_lock_suspend_mx(th);
370
371 KF_TRACE(10, ("__kmp_suspend_template: T#%d setting sleep bit for flag's"
372 " loc(%p)\n",
373 th_gtid, flag->get()));
374
375 /* TODO: shouldn't this use release semantics to ensure that
376 __kmp_suspend_initialize_thread gets called first? */
377 old_spin = flag->set_sleeping();
378 TCW_PTR(th->th.th_sleep_loc, (void *)flag);
379 th->th.th_sleep_loc_type = flag->get_type();
380 if (__kmp_dflt_blocktime == KMP_MAX_BLOCKTIME &&
381 __kmp_pause_status != kmp_soft_paused) {
382 flag->unset_sleeping();
383 TCW_PTR(th->th.th_sleep_loc, NULL);
384 th->th.th_sleep_loc_type = flag_unset;
385 __kmp_unlock_suspend_mx(th);
386 return;
387 }
388
389 KF_TRACE(5, ("__kmp_suspend_template: T#%d set sleep bit for flag's"
390 " loc(%p)==%u\n",
391 th_gtid, flag->get(), (unsigned int)flag->load()));
392
393 if (flag->done_check_val(old_spin) || flag->done_check()) {
394 flag->unset_sleeping();
395 TCW_PTR(th->th.th_sleep_loc, NULL);
396 th->th.th_sleep_loc_type = flag_unset;
397 KF_TRACE(5, ("__kmp_suspend_template: T#%d false alarm, reset sleep bit "
398 "for flag's loc(%p)\n",
399 th_gtid, flag->get()));
400 } else {
401 #ifdef DEBUG_SUSPEND
402 __kmp_suspend_count++;
403 #endif
404 /* Encapsulate in a loop as the documentation states that this may "with
405 low probability" return when the condition variable has not been signaled
406 or broadcast */
407 int deactivated = FALSE;
408
409 while (flag->is_sleeping()) {
410 KF_TRACE(15, ("__kmp_suspend_template: T#%d about to perform "
411 "kmp_win32_cond_wait()\n",
412 th_gtid));
413 // Mark the thread as no longer active (only in the first iteration of the
414 // loop).
415 if (!deactivated) {
416 th->th.th_active = FALSE;
417 if (th->th.th_active_in_pool) {
418 th->th.th_active_in_pool = FALSE;
419 KMP_ATOMIC_DEC(&__kmp_thread_pool_active_nth);
420 KMP_DEBUG_ASSERT(TCR_4(__kmp_thread_pool_active_nth) >= 0);
421 }
422 deactivated = TRUE;
423 }
424
425 KMP_DEBUG_ASSERT(th->th.th_sleep_loc);
426 KMP_DEBUG_ASSERT(th->th.th_sleep_loc_type == flag->get_type());
427
428 __kmp_win32_cond_wait(&th->th.th_suspend_cv, &th->th.th_suspend_mx, th,
429 flag);
430
431 #ifdef KMP_DEBUG
432 if (flag->is_sleeping()) {
433 KF_TRACE(100,
434 ("__kmp_suspend_template: T#%d spurious wakeup\n", th_gtid));
435 }
436 #endif /* KMP_DEBUG */
437
438 } // while
439
440 // We may have had the loop variable set before entering the loop body;
441 // so we need to reset sleep_loc.
442 TCW_PTR(th->th.th_sleep_loc, NULL);
443 th->th.th_sleep_loc_type = flag_unset;
444
445 KMP_DEBUG_ASSERT(!flag->is_sleeping());
446 KMP_DEBUG_ASSERT(!th->th.th_sleep_loc);
447
448 // Mark the thread as active again (if it was previous marked as inactive)
449 if (deactivated) {
450 th->th.th_active = TRUE;
451 if (TCR_4(th->th.th_in_pool)) {
452 KMP_ATOMIC_INC(&__kmp_thread_pool_active_nth);
453 th->th.th_active_in_pool = TRUE;
454 }
455 }
456 }
457
458 __kmp_unlock_suspend_mx(th);
459 KF_TRACE(30, ("__kmp_suspend_template: T#%d exit\n", th_gtid));
460 }
461
462 template <bool C, bool S>
463 void __kmp_suspend_32(int th_gtid, kmp_flag_32<C, S> *flag) {
464 __kmp_suspend_template(th_gtid, flag);
465 }
466 template <bool C, bool S>
467 void __kmp_suspend_64(int th_gtid, kmp_flag_64<C, S> *flag) {
468 __kmp_suspend_template(th_gtid, flag);
469 }
470 template <bool C, bool S>
471 void __kmp_atomic_suspend_64(int th_gtid, kmp_atomic_flag_64<C, S> *flag) {
472 __kmp_suspend_template(th_gtid, flag);
473 }
474 void __kmp_suspend_oncore(int th_gtid, kmp_flag_oncore *flag) {
475 __kmp_suspend_template(th_gtid, flag);
476 }
477
478 template void __kmp_suspend_32<false, false>(int, kmp_flag_32<false, false> *);
479 template void __kmp_suspend_64<false, true>(int, kmp_flag_64<false, true> *);
480 template void __kmp_suspend_64<true, false>(int, kmp_flag_64<true, false> *);
481 template void
482 __kmp_atomic_suspend_64<false, true>(int, kmp_atomic_flag_64<false, true> *);
483 template void
484 __kmp_atomic_suspend_64<true, false>(int, kmp_atomic_flag_64<true, false> *);
485
486 /* This routine signals the thread specified by target_gtid to wake up
487 after setting the sleep bit indicated by the flag argument to FALSE */
488 template <class C>
489 static inline void __kmp_resume_template(int target_gtid, C *flag) {
490 kmp_info_t *th = __kmp_threads[target_gtid];
491
492 #ifdef KMP_DEBUG
493 int gtid = TCR_4(__kmp_init_gtid) ? __kmp_get_gtid() : -1;
494 #endif
495
496 KF_TRACE(30, ("__kmp_resume_template: T#%d wants to wakeup T#%d enter\n",
497 gtid, target_gtid));
498
499 __kmp_suspend_initialize_thread(th);
500 __kmp_lock_suspend_mx(th);
501
502 if (!flag || flag != th->th.th_sleep_loc) {
503 // coming from __kmp_null_resume_wrapper, or thread is now sleeping on a
504 // different location; wake up at new location
505 flag = (C *)th->th.th_sleep_loc;
506 }
507
508 // First, check if the flag is null or its type has changed. If so, someone
509 // else woke it up.
510 if (!flag || flag->get_type() != th->th.th_sleep_loc_type) {
511 // simply shows what flag was cast to
512 KF_TRACE(5, ("__kmp_resume_template: T#%d exiting, thread T#%d already "
513 "awake: flag's loc(%p)\n",
514 gtid, target_gtid, NULL));
515 __kmp_unlock_suspend_mx(th);
516 return;
517 } else {
518 if (!flag->is_sleeping()) {
519 KF_TRACE(5, ("__kmp_resume_template: T#%d exiting, thread T#%d already "
520 "awake: flag's loc(%p): %u\n",
521 gtid, target_gtid, flag->get(), (unsigned int)flag->load()));
522 __kmp_unlock_suspend_mx(th);
523 return;
524 }
525 }
526 KMP_DEBUG_ASSERT(flag);
527 flag->unset_sleeping();
528 TCW_PTR(th->th.th_sleep_loc, NULL);
529 th->th.th_sleep_loc_type = flag_unset;
530
531 KF_TRACE(5, ("__kmp_resume_template: T#%d about to wakeup T#%d, reset sleep "
532 "bit for flag's loc(%p)\n",
533 gtid, target_gtid, flag->get()));
534
535 __kmp_win32_cond_signal(&th->th.th_suspend_cv);
536 __kmp_unlock_suspend_mx(th);
537
538 KF_TRACE(30, ("__kmp_resume_template: T#%d exiting after signaling wake up"
539 " for T#%d\n",
540 gtid, target_gtid));
541 }
542
543 template <bool C, bool S>
544 void __kmp_resume_32(int target_gtid, kmp_flag_32<C, S> *flag) {
545 __kmp_resume_template(target_gtid, flag);
546 }
547 template <bool C, bool S>
548 void __kmp_resume_64(int target_gtid, kmp_flag_64<C, S> *flag) {
549 __kmp_resume_template(target_gtid, flag);
550 }
551 template <bool C, bool S>
552 void __kmp_atomic_resume_64(int target_gtid, kmp_atomic_flag_64<C, S> *flag) {
553 __kmp_resume_template(target_gtid, flag);
554 }
555 void __kmp_resume_oncore(int target_gtid, kmp_flag_oncore *flag) {
556 __kmp_resume_template(target_gtid, flag);
557 }
558
559 template void __kmp_resume_32<false, true>(int, kmp_flag_32<false, true> *);
560 template void __kmp_resume_32<false, false>(int, kmp_flag_32<false, false> *);
561 template void __kmp_resume_64<false, true>(int, kmp_flag_64<false, true> *);
562 template void
563 __kmp_atomic_resume_64<false, true>(int, kmp_atomic_flag_64<false, true> *);
564
565 void __kmp_yield() { Sleep(0); }
566
567 void __kmp_gtid_set_specific(int gtid) {
568 if (__kmp_init_gtid) {
569 KA_TRACE(50, ("__kmp_gtid_set_specific: T#%d key:%d\n", gtid,
570 __kmp_gtid_threadprivate_key));
571 kmp_intptr_t g = (kmp_intptr_t)gtid;
572 if (!TlsSetValue(__kmp_gtid_threadprivate_key, (LPVOID)(g + 1)))
573 KMP_FATAL(TLSSetValueFailed);
574 } else {
575 KA_TRACE(50, ("__kmp_gtid_set_specific: runtime shutdown, returning\n"));
576 }
577 }
578
579 int __kmp_gtid_get_specific() {
580 int gtid;
581 if (!__kmp_init_gtid) {
582 KA_TRACE(50, ("__kmp_gtid_get_specific: runtime shutdown, returning "
583 "KMP_GTID_SHUTDOWN\n"));
584 return KMP_GTID_SHUTDOWN;
585 }
586 gtid = (int)(kmp_intptr_t)TlsGetValue(__kmp_gtid_threadprivate_key);
587 if (gtid == 0) {
588 gtid = KMP_GTID_DNE;
589 } else {
590 gtid--;
591 }
592 KA_TRACE(50, ("__kmp_gtid_get_specific: key:%d gtid:%d\n",
593 __kmp_gtid_threadprivate_key, gtid));
594 return gtid;
595 }
596
597 void __kmp_affinity_bind_thread(int proc) {
598 if (__kmp_num_proc_groups > 1) {
599 // Form the GROUP_AFFINITY struct directly, rather than filling
600 // out a bit vector and calling __kmp_set_system_affinity().
601 GROUP_AFFINITY ga;
602 KMP_DEBUG_ASSERT((proc >= 0) && (proc < (__kmp_num_proc_groups * CHAR_BIT *
603 sizeof(DWORD_PTR))));
604 ga.Group = proc / (CHAR_BIT * sizeof(DWORD_PTR));
605 ga.Mask = (unsigned long long)1 << (proc % (CHAR_BIT * sizeof(DWORD_PTR)));
606 ga.Reserved[0] = ga.Reserved[1] = ga.Reserved[2] = 0;
607
608 KMP_DEBUG_ASSERT(__kmp_SetThreadGroupAffinity != NULL);
609 if (__kmp_SetThreadGroupAffinity(GetCurrentThread(), &ga, NULL) == 0) {
610 DWORD error = GetLastError();
611 // AC: continue silently if not verbose
612 if (__kmp_affinity.flags.verbose) {
613 kmp_msg_t err_code = KMP_ERR(error);
614 __kmp_msg(kmp_ms_warning, KMP_MSG(CantSetThreadAffMask), err_code,
615 __kmp_msg_null);
616 if (__kmp_generate_warnings == kmp_warnings_off) {
617 __kmp_str_free(&err_code.str);
618 }
619 }
620 }
621 } else {
622 kmp_affin_mask_t *mask;
623 KMP_CPU_ALLOC_ON_STACK(mask);
624 KMP_CPU_ZERO(mask);
625 KMP_CPU_SET(proc, mask);
626 __kmp_set_system_affinity(mask, TRUE);
627 KMP_CPU_FREE_FROM_STACK(mask);
628 }
629 }
630
631 void __kmp_affinity_determine_capable(const char *env_var) {
632 // All versions of Windows* OS (since Win '95) support
633 // SetThreadAffinityMask().
634
635 #if KMP_GROUP_AFFINITY
636 KMP_AFFINITY_ENABLE(__kmp_num_proc_groups * sizeof(DWORD_PTR));
637 #else
638 KMP_AFFINITY_ENABLE(sizeof(DWORD_PTR));
639 #endif
640
641 KA_TRACE(10, ("__kmp_affinity_determine_capable: "
642 "Windows* OS affinity interface functional (mask size = "
643 "%" KMP_SIZE_T_SPEC ").\n",
644 __kmp_affin_mask_size));
645 }
646
647 double __kmp_read_cpu_time(void) {
648 FILETIME CreationTime, ExitTime, KernelTime, UserTime;
649 int status;
650 double cpu_time;
651
652 cpu_time = 0;
653
654 status = GetProcessTimes(GetCurrentProcess(), &CreationTime, &ExitTime,
655 &KernelTime, &UserTime);
656
657 if (status) {
658 double sec = 0;
659
660 sec += KernelTime.dwHighDateTime;
661 sec += UserTime.dwHighDateTime;
662
663 /* Shift left by 32 bits */
664 sec *= (double)(1 << 16) * (double)(1 << 16);
665
666 sec += KernelTime.dwLowDateTime;
667 sec += UserTime.dwLowDateTime;
668
669 cpu_time += (sec * 100.0) / KMP_NSEC_PER_SEC;
670 }
671
672 return cpu_time;
673 }
674
675 int __kmp_read_system_info(struct kmp_sys_info *info) {
676 info->maxrss = 0; /* the maximum resident set size utilized (in kilobytes) */
677 info->minflt = 0; /* the number of page faults serviced without any I/O */
678 info->majflt = 0; /* the number of page faults serviced that required I/O */
679 info->nswap = 0; // the number of times a process was "swapped" out of memory
680 info->inblock = 0; // the number of times the file system had to perform input
681 info->oublock = 0; // number of times the file system had to perform output
682 info->nvcsw = 0; /* the number of times a context switch was voluntarily */
683 info->nivcsw = 0; /* the number of times a context switch was forced */
684
685 return 1;
686 }
687
688 void __kmp_runtime_initialize(void) {
689 SYSTEM_INFO info;
690 kmp_str_buf_t path;
691 UINT path_size;
692
693 if (__kmp_init_runtime) {
694 return;
695 }
696
697 #if KMP_DYNAMIC_LIB
698 /* Pin dynamic library for the lifetime of application */
699 {
700 // First, turn off error message boxes
701 UINT err_mode = SetErrorMode(SEM_FAILCRITICALERRORS);
702 HMODULE h;
703 BOOL ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
704 GET_MODULE_HANDLE_EX_FLAG_PIN,
705 (LPCTSTR)&__kmp_serial_initialize, &h);
706 (void)ret;
707 KMP_DEBUG_ASSERT2(h && ret, "OpenMP RTL cannot find itself loaded");
708 SetErrorMode(err_mode); // Restore error mode
709 KA_TRACE(10, ("__kmp_runtime_initialize: dynamic library pinned\n"));
710 }
711 #endif
712
713 InitializeCriticalSection(&__kmp_win32_section);
714 #if USE_ITT_BUILD
715 __kmp_itt_system_object_created(&__kmp_win32_section, "Critical Section");
716 #endif /* USE_ITT_BUILD */
717 __kmp_initialize_system_tick();
718
719 #if (KMP_ARCH_X86 || KMP_ARCH_X86_64)
720 if (!__kmp_cpuinfo.initialized) {
721 __kmp_query_cpuid(&__kmp_cpuinfo);
722 }
723 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */
724
725 /* Set up minimum number of threads to switch to TLS gtid */
726 #if KMP_OS_WINDOWS && !KMP_DYNAMIC_LIB
727 // Windows* OS, static library.
728 /* New thread may use stack space previously used by another thread,
729 currently terminated. On Windows* OS, in case of static linking, we do not
730 know the moment of thread termination, and our structures (__kmp_threads
731 and __kmp_root arrays) are still keep info about dead threads. This leads
732 to problem in __kmp_get_global_thread_id() function: it wrongly finds gtid
733 (by searching through stack addresses of all known threads) for
734 unregistered foreign tread.
735
736 Setting __kmp_tls_gtid_min to 0 workarounds this problem:
737 __kmp_get_global_thread_id() does not search through stacks, but get gtid
738 from TLS immediately.
739 --ln
740 */
741 __kmp_tls_gtid_min = 0;
742 #else
743 __kmp_tls_gtid_min = KMP_TLS_GTID_MIN;
744 #endif
745
746 /* for the static library */
747 if (!__kmp_gtid_threadprivate_key) {
748 __kmp_gtid_threadprivate_key = TlsAlloc();
749 if (__kmp_gtid_threadprivate_key == TLS_OUT_OF_INDEXES) {
750 KMP_FATAL(TLSOutOfIndexes);
751 }
752 }
753
754 // Load ntdll.dll.
755 /* Simple GetModuleHandle( "ntdll.dl" ) is not suitable due to security issue
756 (see http://www.microsoft.com/technet/security/advisory/2269637.mspx). We
757 have to specify full path to the library. */
758 __kmp_str_buf_init(&path);
759 path_size = GetSystemDirectory(path.str, path.size);
760 KMP_DEBUG_ASSERT(path_size > 0);
761 if (path_size >= path.size) {
762 // Buffer is too short. Expand the buffer and try again.
763 __kmp_str_buf_reserve(&path, path_size);
764 path_size = GetSystemDirectory(path.str, path.size);
765 KMP_DEBUG_ASSERT(path_size > 0);
766 }
767 if (path_size > 0 && path_size < path.size) {
768 // Now we have system directory name in the buffer.
769 // Append backslash and name of dll to form full path,
770 path.used = path_size;
771 __kmp_str_buf_print(&path, "\\%s", "ntdll.dll");
772
773 // Now load ntdll using full path.
774 ntdll = GetModuleHandle(path.str);
775 }
776
777 KMP_DEBUG_ASSERT(ntdll != NULL);
778 if (ntdll != NULL) {
779 NtQuerySystemInformation = (NtQuerySystemInformation_t)GetProcAddress(
780 ntdll, "NtQuerySystemInformation");
781 }
782 KMP_DEBUG_ASSERT(NtQuerySystemInformation != NULL);
783
784 #if KMP_GROUP_AFFINITY
785 // Load kernel32.dll.
786 // Same caveat - must use full system path name.
787 if (path_size > 0 && path_size < path.size) {
788 // Truncate the buffer back to just the system path length,
789 // discarding "\\ntdll.dll", and replacing it with "kernel32.dll".
790 path.used = path_size;
791 __kmp_str_buf_print(&path, "\\%s", "kernel32.dll");
792
793 // Load kernel32.dll using full path.
794 kernel32 = GetModuleHandle(path.str);
795 KA_TRACE(10, ("__kmp_runtime_initialize: kernel32.dll = %s\n", path.str));
796
797 // Load the function pointers to kernel32.dll routines
798 // that may or may not exist on this system.
799 if (kernel32 != NULL) {
800 __kmp_GetActiveProcessorCount =
801 (kmp_GetActiveProcessorCount_t)GetProcAddress(
802 kernel32, "GetActiveProcessorCount");
803 __kmp_GetActiveProcessorGroupCount =
804 (kmp_GetActiveProcessorGroupCount_t)GetProcAddress(
805 kernel32, "GetActiveProcessorGroupCount");
806 __kmp_GetThreadGroupAffinity =
807 (kmp_GetThreadGroupAffinity_t)GetProcAddress(
808 kernel32, "GetThreadGroupAffinity");
809 __kmp_SetThreadGroupAffinity =
810 (kmp_SetThreadGroupAffinity_t)GetProcAddress(
811 kernel32, "SetThreadGroupAffinity");
812
813 KA_TRACE(10, ("__kmp_runtime_initialize: __kmp_GetActiveProcessorCount"
814 " = %p\n",
815 __kmp_GetActiveProcessorCount));
816 KA_TRACE(10, ("__kmp_runtime_initialize: "
817 "__kmp_GetActiveProcessorGroupCount = %p\n",
818 __kmp_GetActiveProcessorGroupCount));
819 KA_TRACE(10, ("__kmp_runtime_initialize:__kmp_GetThreadGroupAffinity"
820 " = %p\n",
821 __kmp_GetThreadGroupAffinity));
822 KA_TRACE(10, ("__kmp_runtime_initialize: __kmp_SetThreadGroupAffinity"
823 " = %p\n",
824 __kmp_SetThreadGroupAffinity));
825 KA_TRACE(10, ("__kmp_runtime_initialize: sizeof(kmp_affin_mask_t) = %d\n",
826 sizeof(kmp_affin_mask_t)));
827
828 // See if group affinity is supported on this system.
829 // If so, calculate the #groups and #procs.
830 //
831 // Group affinity was introduced with Windows* 7 OS and
832 // Windows* Server 2008 R2 OS.
833 if ((__kmp_GetActiveProcessorCount != NULL) &&
834 (__kmp_GetActiveProcessorGroupCount != NULL) &&
835 (__kmp_GetThreadGroupAffinity != NULL) &&
836 (__kmp_SetThreadGroupAffinity != NULL) &&
837 ((__kmp_num_proc_groups = __kmp_GetActiveProcessorGroupCount()) >
838 1)) {
839 // Calculate the total number of active OS procs.
840 int i;
841
842 KA_TRACE(10, ("__kmp_runtime_initialize: %d processor groups"
843 " detected\n",
844 __kmp_num_proc_groups));
845
846 __kmp_xproc = 0;
847
848 for (i = 0; i < __kmp_num_proc_groups; i++) {
849 DWORD size = __kmp_GetActiveProcessorCount(i);
850 __kmp_xproc += size;
851 KA_TRACE(10, ("__kmp_runtime_initialize: proc group %d size = %d\n",
852 i, size));
853 }
854 } else {
855 KA_TRACE(10, ("__kmp_runtime_initialize: %d processor groups"
856 " detected\n",
857 __kmp_num_proc_groups));
858 }
859 }
860 }
861 if (__kmp_num_proc_groups <= 1) {
862 GetSystemInfo(&info);
863 __kmp_xproc = info.dwNumberOfProcessors;
864 }
865 #else
866 (void)kernel32;
867 GetSystemInfo(&info);
868 __kmp_xproc = info.dwNumberOfProcessors;
869 #endif /* KMP_GROUP_AFFINITY */
870
871 // If the OS said there were 0 procs, take a guess and use a value of 2.
872 // This is done for Linux* OS, also. Do we need error / warning?
873 if (__kmp_xproc <= 0) {
874 __kmp_xproc = 2;
875 }
876
877 KA_TRACE(5,
878 ("__kmp_runtime_initialize: total processors = %d\n", __kmp_xproc));
879
880 __kmp_str_buf_free(&path);
881
882 #if USE_ITT_BUILD
883 __kmp_itt_initialize();
884 #endif /* USE_ITT_BUILD */
885
886 __kmp_init_runtime = TRUE;
887 } // __kmp_runtime_initialize
888
889 void __kmp_runtime_destroy(void) {
890 if (!__kmp_init_runtime) {
891 return;
892 }
893
894 #if USE_ITT_BUILD
895 __kmp_itt_destroy();
896 #endif /* USE_ITT_BUILD */
897
898 /* we can't DeleteCriticalsection( & __kmp_win32_section ); */
899 /* due to the KX_TRACE() commands */
900 KA_TRACE(40, ("__kmp_runtime_destroy\n"));
901
902 if (__kmp_gtid_threadprivate_key) {
903 TlsFree(__kmp_gtid_threadprivate_key);
904 __kmp_gtid_threadprivate_key = 0;
905 }
906
907 __kmp_affinity_uninitialize();
908 DeleteCriticalSection(&__kmp_win32_section);
909
910 ntdll = NULL;
911 NtQuerySystemInformation = NULL;
912
913 #if KMP_ARCH_X86_64
914 kernel32 = NULL;
915 __kmp_GetActiveProcessorCount = NULL;
916 __kmp_GetActiveProcessorGroupCount = NULL;
917 __kmp_GetThreadGroupAffinity = NULL;
918 __kmp_SetThreadGroupAffinity = NULL;
919 #endif // KMP_ARCH_X86_64
920
921 __kmp_init_runtime = FALSE;
922 }
923
924 void __kmp_terminate_thread(int gtid) {
925 kmp_info_t *th = __kmp_threads[gtid];
926
927 if (!th)
928 return;
929
930 KA_TRACE(10, ("__kmp_terminate_thread: kill (%d)\n", gtid));
931
932 if (TerminateThread(th->th.th_info.ds.ds_thread, (DWORD)-1) == FALSE) {
933 /* It's OK, the thread may have exited already */
934 }
935 __kmp_free_handle(th->th.th_info.ds.ds_thread);
936 }
937
938 void __kmp_clear_system_time(void) {
939 LARGE_INTEGER time;
940 QueryPerformanceCounter(&time);
941 __kmp_win32_time = (kmp_int64)time.QuadPart;
942 }
943
944 void __kmp_initialize_system_tick(void) {
945 {
946 BOOL status;
947 LARGE_INTEGER freq;
948
949 status = QueryPerformanceFrequency(&freq);
950 if (!status) {
951 DWORD error = GetLastError();
952 __kmp_fatal(KMP_MSG(FunctionError, "QueryPerformanceFrequency()"),
953 KMP_ERR(error), __kmp_msg_null);
954
955 } else {
956 __kmp_win32_tick = ((double)1.0) / (double)freq.QuadPart;
957 }
958 }
959 }
960
961 /* Calculate the elapsed wall clock time for the user */
962
963 void __kmp_elapsed(double *t) {
964 LARGE_INTEGER now;
965 QueryPerformanceCounter(&now);
966 *t = ((double)now.QuadPart) * __kmp_win32_tick;
967 }
968
969 /* Calculate the elapsed wall clock tick for the user */
970
971 void __kmp_elapsed_tick(double *t) { *t = __kmp_win32_tick; }
972
973 void __kmp_read_system_time(double *delta) {
974 if (delta != NULL) {
975 LARGE_INTEGER now;
976 QueryPerformanceCounter(&now);
977 *delta = ((double)(((kmp_int64)now.QuadPart) - __kmp_win32_time)) *
978 __kmp_win32_tick;
979 }
980 }
981
982 /* Return the current time stamp in nsec */
983 kmp_uint64 __kmp_now_nsec() {
984 LARGE_INTEGER now;
985 QueryPerformanceCounter(&now);
986 return 1e9 * __kmp_win32_tick * now.QuadPart;
987 }
988
989 extern "C" void *__stdcall __kmp_launch_worker(void *arg) {
990 volatile void *stack_data;
991 void *exit_val;
992 void *padding = 0;
993 kmp_info_t *this_thr = (kmp_info_t *)arg;
994 int gtid;
995
996 gtid = this_thr->th.th_info.ds.ds_gtid;
997 __kmp_gtid_set_specific(gtid);
998 #ifdef KMP_TDATA_GTID
999 #error "This define causes problems with LoadLibrary() + declspec(thread) " \
1000 "on Windows* OS. See CQ50564, tests kmp_load_library*.c and this MSDN " \
1001 "reference: http://support.microsoft.com/kb/118816"
1002 //__kmp_gtid = gtid;
1003 #endif
1004
1005 #if USE_ITT_BUILD
1006 __kmp_itt_thread_name(gtid);
1007 #endif /* USE_ITT_BUILD */
1008
1009 __kmp_affinity_bind_init_mask(gtid);
1010
1011 #if KMP_ARCH_X86 || KMP_ARCH_X86_64
1012 // Set FP control regs to be a copy of the parallel initialization thread's.
1013 __kmp_clear_x87_fpu_status_word();
1014 __kmp_load_x87_fpu_control_word(&__kmp_init_x87_fpu_control_word);
1015 __kmp_load_mxcsr(&__kmp_init_mxcsr);
1016 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */
1017
1018 if (__kmp_stkoffset > 0 && gtid > 0) {
1019 padding = KMP_ALLOCA(gtid * __kmp_stkoffset);
1020 (void)padding;
1021 }
1022
1023 KMP_FSYNC_RELEASING(&this_thr->th.th_info.ds.ds_alive);
1024 this_thr->th.th_info.ds.ds_thread_id = GetCurrentThreadId();
1025 TCW_4(this_thr->th.th_info.ds.ds_alive, TRUE);
1026
1027 if (TCR_4(__kmp_gtid_mode) <
1028 2) { // check stack only if it is used to get gtid
1029 TCW_PTR(this_thr->th.th_info.ds.ds_stackbase, &stack_data);
1030 KMP_ASSERT(this_thr->th.th_info.ds.ds_stackgrow == FALSE);
1031 __kmp_check_stack_overlap(this_thr);
1032 }
1033 KMP_MB();
1034 exit_val = __kmp_launch_thread(this_thr);
1035 KMP_FSYNC_RELEASING(&this_thr->th.th_info.ds.ds_alive);
1036 TCW_4(this_thr->th.th_info.ds.ds_alive, FALSE);
1037 KMP_MB();
1038 return exit_val;
1039 }
1040
1041 #if KMP_USE_MONITOR
1042 /* The monitor thread controls all of the threads in the complex */
1043
1044 void *__stdcall __kmp_launch_monitor(void *arg) {
1045 DWORD wait_status;
1046 kmp_thread_t monitor;
1047 int status;
1048 int interval;
1049 kmp_info_t *this_thr = (kmp_info_t *)arg;
1050
1051 KMP_DEBUG_ASSERT(__kmp_init_monitor);
1052 TCW_4(__kmp_init_monitor, 2); // AC: Signal library that monitor has started
1053 // TODO: hide "2" in enum (like {true,false,started})
1054 this_thr->th.th_info.ds.ds_thread_id = GetCurrentThreadId();
1055 TCW_4(this_thr->th.th_info.ds.ds_alive, TRUE);
1056
1057 KMP_MB(); /* Flush all pending memory write invalidates. */
1058 KA_TRACE(10, ("__kmp_launch_monitor: launched\n"));
1059
1060 monitor = GetCurrentThread();
1061
1062 /* set thread priority */
1063 status = SetThreadPriority(monitor, THREAD_PRIORITY_HIGHEST);
1064 if (!status) {
1065 DWORD error = GetLastError();
1066 __kmp_fatal(KMP_MSG(CantSetThreadPriority), KMP_ERR(error), __kmp_msg_null);
1067 }
1068
1069 /* register us as monitor */
1070 __kmp_gtid_set_specific(KMP_GTID_MONITOR);
1071 #ifdef KMP_TDATA_GTID
1072 #error "This define causes problems with LoadLibrary() + declspec(thread) " \
1073 "on Windows* OS. See CQ50564, tests kmp_load_library*.c and this MSDN " \
1074 "reference: http://support.microsoft.com/kb/118816"
1075 //__kmp_gtid = KMP_GTID_MONITOR;
1076 #endif
1077
1078 #if USE_ITT_BUILD
1079 __kmp_itt_thread_ignore(); // Instruct Intel(R) Threading Tools to ignore
1080 // monitor thread.
1081 #endif /* USE_ITT_BUILD */
1082
1083 KMP_MB(); /* Flush all pending memory write invalidates. */
1084
1085 interval = (1000 / __kmp_monitor_wakeups); /* in milliseconds */
1086
1087 while (!TCR_4(__kmp_global.g.g_done)) {
1088 /* This thread monitors the state of the system */
1089
1090 KA_TRACE(15, ("__kmp_launch_monitor: update\n"));
1091
1092 wait_status = WaitForSingleObject(__kmp_monitor_ev, interval);
1093
1094 if (wait_status == WAIT_TIMEOUT) {
1095 TCW_4(__kmp_global.g.g_time.dt.t_value,
1096 TCR_4(__kmp_global.g.g_time.dt.t_value) + 1);
1097 }
1098
1099 KMP_MB(); /* Flush all pending memory write invalidates. */
1100 }
1101
1102 KA_TRACE(10, ("__kmp_launch_monitor: finished\n"));
1103
1104 status = SetThreadPriority(monitor, THREAD_PRIORITY_NORMAL);
1105 if (!status) {
1106 DWORD error = GetLastError();
1107 __kmp_fatal(KMP_MSG(CantSetThreadPriority), KMP_ERR(error), __kmp_msg_null);
1108 }
1109
1110 if (__kmp_global.g.g_abort != 0) {
1111 /* now we need to terminate the worker threads */
1112 /* the value of t_abort is the signal we caught */
1113 int gtid;
1114
1115 KA_TRACE(10, ("__kmp_launch_monitor: terminate sig=%d\n",
1116 (__kmp_global.g.g_abort)));
1117
1118 /* terminate the OpenMP worker threads */
1119 /* TODO this is not valid for sibling threads!!
1120 * the uber master might not be 0 anymore.. */
1121 for (gtid = 1; gtid < __kmp_threads_capacity; ++gtid)
1122 __kmp_terminate_thread(gtid);
1123
1124 __kmp_cleanup();
1125
1126 Sleep(0);
1127
1128 KA_TRACE(10,
1129 ("__kmp_launch_monitor: raise sig=%d\n", __kmp_global.g.g_abort));
1130
1131 if (__kmp_global.g.g_abort > 0) {
1132 raise(__kmp_global.g.g_abort);
1133 }
1134 }
1135
1136 TCW_4(this_thr->th.th_info.ds.ds_alive, FALSE);
1137
1138 KMP_MB();
1139 return arg;
1140 }
1141 #endif
1142
1143 void __kmp_create_worker(int gtid, kmp_info_t *th, size_t stack_size) {
1144 kmp_thread_t handle;
1145 DWORD idThread;
1146
1147 KA_TRACE(10, ("__kmp_create_worker: try to create thread (%d)\n", gtid));
1148
1149 th->th.th_info.ds.ds_gtid = gtid;
1150
1151 if (KMP_UBER_GTID(gtid)) {
1152 int stack_data;
1153
1154 /* TODO: GetCurrentThread() returns a pseudo-handle that is unsuitable for
1155 other threads to use. Is it appropriate to just use GetCurrentThread?
1156 When should we close this handle? When unregistering the root? */
1157 {
1158 BOOL rc;
1159 rc = DuplicateHandle(GetCurrentProcess(), GetCurrentThread(),
1160 GetCurrentProcess(), &th->th.th_info.ds.ds_thread, 0,
1161 FALSE, DUPLICATE_SAME_ACCESS);
1162 KMP_ASSERT(rc);
1163 KA_TRACE(10, (" __kmp_create_worker: ROOT Handle duplicated, th = %p, "
1164 "handle = %" KMP_UINTPTR_SPEC "\n",
1165 (LPVOID)th, th->th.th_info.ds.ds_thread));
1166 th->th.th_info.ds.ds_thread_id = GetCurrentThreadId();
1167 }
1168 if (TCR_4(__kmp_gtid_mode) < 2) { // check stack only if used to get gtid
1169 /* we will dynamically update the stack range if gtid_mode == 1 */
1170 TCW_PTR(th->th.th_info.ds.ds_stackbase, &stack_data);
1171 TCW_PTR(th->th.th_info.ds.ds_stacksize, 0);
1172 TCW_4(th->th.th_info.ds.ds_stackgrow, TRUE);
1173 __kmp_check_stack_overlap(th);
1174 }
1175 } else {
1176 KMP_MB(); /* Flush all pending memory write invalidates. */
1177
1178 /* Set stack size for this thread now. */
1179 KA_TRACE(10,
1180 ("__kmp_create_worker: stack_size = %" KMP_SIZE_T_SPEC " bytes\n",
1181 stack_size));
1182
1183 stack_size += gtid * __kmp_stkoffset;
1184
1185 TCW_PTR(th->th.th_info.ds.ds_stacksize, stack_size);
1186 TCW_4(th->th.th_info.ds.ds_stackgrow, FALSE);
1187
1188 KA_TRACE(10,
1189 ("__kmp_create_worker: (before) stack_size = %" KMP_SIZE_T_SPEC
1190 " bytes, &__kmp_launch_worker = %p, th = %p, &idThread = %p\n",
1191 (SIZE_T)stack_size, (LPTHREAD_START_ROUTINE)&__kmp_launch_worker,
1192 (LPVOID)th, &idThread));
1193
1194 handle = CreateThread(
1195 NULL, (SIZE_T)stack_size, (LPTHREAD_START_ROUTINE)__kmp_launch_worker,
1196 (LPVOID)th, STACK_SIZE_PARAM_IS_A_RESERVATION, &idThread);
1197
1198 KA_TRACE(10,
1199 ("__kmp_create_worker: (after) stack_size = %" KMP_SIZE_T_SPEC
1200 " bytes, &__kmp_launch_worker = %p, th = %p, "
1201 "idThread = %u, handle = %" KMP_UINTPTR_SPEC "\n",
1202 (SIZE_T)stack_size, (LPTHREAD_START_ROUTINE)&__kmp_launch_worker,
1203 (LPVOID)th, idThread, handle));
1204
1205 if (handle == 0) {
1206 DWORD error = GetLastError();
1207 __kmp_fatal(KMP_MSG(CantCreateThread), KMP_ERR(error), __kmp_msg_null);
1208 } else {
1209 th->th.th_info.ds.ds_thread = handle;
1210 }
1211
1212 KMP_MB(); /* Flush all pending memory write invalidates. */
1213 }
1214
1215 KA_TRACE(10, ("__kmp_create_worker: done creating thread (%d)\n", gtid));
1216 }
1217
1218 int __kmp_still_running(kmp_info_t *th) {
1219 return (WAIT_TIMEOUT == WaitForSingleObject(th->th.th_info.ds.ds_thread, 0));
1220 }
1221
1222 #if KMP_USE_MONITOR
1223 void __kmp_create_monitor(kmp_info_t *th) {
1224 kmp_thread_t handle;
1225 DWORD idThread;
1226 int ideal, new_ideal;
1227
1228 if (__kmp_dflt_blocktime == KMP_MAX_BLOCKTIME) {
1229 // We don't need monitor thread in case of MAX_BLOCKTIME
1230 KA_TRACE(10, ("__kmp_create_monitor: skipping monitor thread because of "
1231 "MAX blocktime\n"));
1232 th->th.th_info.ds.ds_tid = 0; // this makes reap_monitor no-op
1233 th->th.th_info.ds.ds_gtid = 0;
1234 TCW_4(__kmp_init_monitor, 2); // Signal to stop waiting for monitor creation
1235 return;
1236 }
1237 KA_TRACE(10, ("__kmp_create_monitor: try to create monitor\n"));
1238
1239 KMP_MB(); /* Flush all pending memory write invalidates. */
1240
1241 __kmp_monitor_ev = CreateEvent(NULL, TRUE, FALSE, NULL);
1242 if (__kmp_monitor_ev == NULL) {
1243 DWORD error = GetLastError();
1244 __kmp_fatal(KMP_MSG(CantCreateEvent), KMP_ERR(error), __kmp_msg_null);
1245 }
1246 #if USE_ITT_BUILD
1247 __kmp_itt_system_object_created(__kmp_monitor_ev, "Event");
1248 #endif /* USE_ITT_BUILD */
1249
1250 th->th.th_info.ds.ds_tid = KMP_GTID_MONITOR;
1251 th->th.th_info.ds.ds_gtid = KMP_GTID_MONITOR;
1252
1253 // FIXME - on Windows* OS, if __kmp_monitor_stksize = 0, figure out how
1254 // to automatically expand stacksize based on CreateThread error code.
1255 if (__kmp_monitor_stksize == 0) {
1256 __kmp_monitor_stksize = KMP_DEFAULT_MONITOR_STKSIZE;
1257 }
1258 if (__kmp_monitor_stksize < __kmp_sys_min_stksize) {
1259 __kmp_monitor_stksize = __kmp_sys_min_stksize;
1260 }
1261
1262 KA_TRACE(10, ("__kmp_create_monitor: requested stacksize = %d bytes\n",
1263 (int)__kmp_monitor_stksize));
1264
1265 TCW_4(__kmp_global.g.g_time.dt.t_value, 0);
1266
1267 handle =
1268 CreateThread(NULL, (SIZE_T)__kmp_monitor_stksize,
1269 (LPTHREAD_START_ROUTINE)__kmp_launch_monitor, (LPVOID)th,
1270 STACK_SIZE_PARAM_IS_A_RESERVATION, &idThread);
1271 if (handle == 0) {
1272 DWORD error = GetLastError();
1273 __kmp_fatal(KMP_MSG(CantCreateThread), KMP_ERR(error), __kmp_msg_null);
1274 } else
1275 th->th.th_info.ds.ds_thread = handle;
1276
1277 KMP_MB(); /* Flush all pending memory write invalidates. */
1278
1279 KA_TRACE(10, ("__kmp_create_monitor: monitor created %p\n",
1280 (void *)th->th.th_info.ds.ds_thread));
1281 }
1282 #endif
1283
1284 /* Check to see if thread is still alive.
1285 NOTE: The ExitProcess(code) system call causes all threads to Terminate
1286 with a exit_val = code. Because of this we can not rely on exit_val having
1287 any particular value. So this routine may return STILL_ALIVE in exit_val
1288 even after the thread is dead. */
1289
1290 int __kmp_is_thread_alive(kmp_info_t *th, DWORD *exit_val) {
1291 DWORD rc;
1292 rc = GetExitCodeThread(th->th.th_info.ds.ds_thread, exit_val);
1293 if (rc == 0) {
1294 DWORD error = GetLastError();
1295 __kmp_fatal(KMP_MSG(FunctionError, "GetExitCodeThread()"), KMP_ERR(error),
1296 __kmp_msg_null);
1297 }
1298 return (*exit_val == STILL_ACTIVE);
1299 }
1300
1301 void __kmp_exit_thread(int exit_status) {
1302 ExitThread(exit_status);
1303 } // __kmp_exit_thread
1304
1305 // This is a common part for both __kmp_reap_worker() and __kmp_reap_monitor().
1306 static void __kmp_reap_common(kmp_info_t *th) {
1307 DWORD exit_val;
1308
1309 KMP_MB(); /* Flush all pending memory write invalidates. */
1310
1311 KA_TRACE(
1312 10, ("__kmp_reap_common: try to reap (%d)\n", th->th.th_info.ds.ds_gtid));
1313
1314 /* 2006-10-19:
1315 There are two opposite situations:
1316 1. Windows* OS keep thread alive after it resets ds_alive flag and
1317 exits from thread function. (For example, see C70770/Q394281 "unloading of
1318 dll based on OMP is very slow".)
1319 2. Windows* OS may kill thread before it resets ds_alive flag.
1320
1321 Right solution seems to be waiting for *either* thread termination *or*
1322 ds_alive resetting. */
1323 {
1324 // TODO: This code is very similar to KMP_WAIT. Need to generalize
1325 // KMP_WAIT to cover this usage also.
1326 void *obj = NULL;
1327 kmp_uint32 spins;
1328 kmp_uint64 time;
1329 #if USE_ITT_BUILD
1330 KMP_FSYNC_SPIN_INIT(obj, (void *)&th->th.th_info.ds.ds_alive);
1331 #endif /* USE_ITT_BUILD */
1332 KMP_INIT_YIELD(spins);
1333 KMP_INIT_BACKOFF(time);
1334 do {
1335 #if USE_ITT_BUILD
1336 KMP_FSYNC_SPIN_PREPARE(obj);
1337 #endif /* USE_ITT_BUILD */
1338 __kmp_is_thread_alive(th, &exit_val);
1339 KMP_YIELD_OVERSUB_ELSE_SPIN(spins, time);
1340 } while (exit_val == STILL_ACTIVE && TCR_4(th->th.th_info.ds.ds_alive));
1341 #if USE_ITT_BUILD
1342 if (exit_val == STILL_ACTIVE) {
1343 KMP_FSYNC_CANCEL(obj);
1344 } else {
1345 KMP_FSYNC_SPIN_ACQUIRED(obj);
1346 }
1347 #endif /* USE_ITT_BUILD */
1348 }
1349
1350 __kmp_free_handle(th->th.th_info.ds.ds_thread);
1351
1352 /* NOTE: The ExitProcess(code) system call causes all threads to Terminate
1353 with a exit_val = code. Because of this we can not rely on exit_val having
1354 any particular value. */
1355 kmp_intptr_t e = (kmp_intptr_t)exit_val;
1356 if (exit_val == STILL_ACTIVE) {
1357 KA_TRACE(1, ("__kmp_reap_common: thread still active.\n"));
1358 } else if ((void *)e != (void *)th) {
1359 KA_TRACE(1, ("__kmp_reap_common: ExitProcess / TerminateThread used?\n"));
1360 }
1361
1362 KA_TRACE(10,
1363 ("__kmp_reap_common: done reaping (%d), handle = %" KMP_UINTPTR_SPEC
1364 "\n",
1365 th->th.th_info.ds.ds_gtid, th->th.th_info.ds.ds_thread));
1366
1367 th->th.th_info.ds.ds_thread = 0;
1368 th->th.th_info.ds.ds_tid = KMP_GTID_DNE;
1369 th->th.th_info.ds.ds_gtid = KMP_GTID_DNE;
1370 th->th.th_info.ds.ds_thread_id = 0;
1371
1372 KMP_MB(); /* Flush all pending memory write invalidates. */
1373 }
1374
1375 #if KMP_USE_MONITOR
1376 void __kmp_reap_monitor(kmp_info_t *th) {
1377 int status;
1378
1379 KA_TRACE(10, ("__kmp_reap_monitor: try to reap %p\n",
1380 (void *)th->th.th_info.ds.ds_thread));
1381
1382 // If monitor has been created, its tid and gtid should be KMP_GTID_MONITOR.
1383 // If both tid and gtid are 0, it means the monitor did not ever start.
1384 // If both tid and gtid are KMP_GTID_DNE, the monitor has been shut down.
1385 KMP_DEBUG_ASSERT(th->th.th_info.ds.ds_tid == th->th.th_info.ds.ds_gtid);
1386 if (th->th.th_info.ds.ds_gtid != KMP_GTID_MONITOR) {
1387 KA_TRACE(10, ("__kmp_reap_monitor: monitor did not start, returning\n"));
1388 return;
1389 }
1390
1391 KMP_MB(); /* Flush all pending memory write invalidates. */
1392
1393 status = SetEvent(__kmp_monitor_ev);
1394 if (status == FALSE) {
1395 DWORD error = GetLastError();
1396 __kmp_fatal(KMP_MSG(CantSetEvent), KMP_ERR(error), __kmp_msg_null);
1397 }
1398 KA_TRACE(10, ("__kmp_reap_monitor: reaping thread (%d)\n",
1399 th->th.th_info.ds.ds_gtid));
1400 __kmp_reap_common(th);
1401
1402 __kmp_free_handle(__kmp_monitor_ev);
1403
1404 KMP_MB(); /* Flush all pending memory write invalidates. */
1405 }
1406 #endif
1407
1408 void __kmp_reap_worker(kmp_info_t *th) {
1409 KA_TRACE(10, ("__kmp_reap_worker: reaping thread (%d)\n",
1410 th->th.th_info.ds.ds_gtid));
1411 __kmp_reap_common(th);
1412 }
1413
1414 #if KMP_HANDLE_SIGNALS
1415
1416 static void __kmp_team_handler(int signo) {
1417 if (__kmp_global.g.g_abort == 0) {
1418 // Stage 1 signal handler, let's shut down all of the threads.
1419 if (__kmp_debug_buf) {
1420 __kmp_dump_debug_buffer();
1421 }
1422 KMP_MB(); // Flush all pending memory write invalidates.
1423 TCW_4(__kmp_global.g.g_abort, signo);
1424 KMP_MB(); // Flush all pending memory write invalidates.
1425 TCW_4(__kmp_global.g.g_done, TRUE);
1426 KMP_MB(); // Flush all pending memory write invalidates.
1427 }
1428 } // __kmp_team_handler
1429
1430 static sig_func_t __kmp_signal(int signum, sig_func_t handler) {
1431 sig_func_t old = signal(signum, handler);
1432 if (old == SIG_ERR) {
1433 int error = errno;
1434 __kmp_fatal(KMP_MSG(FunctionError, "signal"), KMP_ERR(error),
1435 __kmp_msg_null);
1436 }
1437 return old;
1438 }
1439
1440 static void __kmp_install_one_handler(int sig, sig_func_t handler,
1441 int parallel_init) {
1442 sig_func_t old;
1443 KMP_MB(); /* Flush all pending memory write invalidates. */
1444 KB_TRACE(60, ("__kmp_install_one_handler: called: sig=%d\n", sig));
1445 if (parallel_init) {
1446 old = __kmp_signal(sig, handler);
1447 // SIG_DFL on Windows* OS in NULL or 0.
1448 if (old == __kmp_sighldrs[sig]) {
1449 __kmp_siginstalled[sig] = 1;
1450 } else { // Restore/keep user's handler if one previously installed.
1451 old = __kmp_signal(sig, old);
1452 }
1453 } else {
1454 // Save initial/system signal handlers to see if user handlers installed.
1455 // 2009-09-23: It is a dead code. On Windows* OS __kmp_install_signals
1456 // called once with parallel_init == TRUE.
1457 old = __kmp_signal(sig, SIG_DFL);
1458 __kmp_sighldrs[sig] = old;
1459 __kmp_signal(sig, old);
1460 }
1461 KMP_MB(); /* Flush all pending memory write invalidates. */
1462 } // __kmp_install_one_handler
1463
1464 static void __kmp_remove_one_handler(int sig) {
1465 if (__kmp_siginstalled[sig]) {
1466 sig_func_t old;
1467 KMP_MB(); // Flush all pending memory write invalidates.
1468 KB_TRACE(60, ("__kmp_remove_one_handler: called: sig=%d\n", sig));
1469 old = __kmp_signal(sig, __kmp_sighldrs[sig]);
1470 if (old != __kmp_team_handler) {
1471 KB_TRACE(10, ("__kmp_remove_one_handler: oops, not our handler, "
1472 "restoring: sig=%d\n",
1473 sig));
1474 old = __kmp_signal(sig, old);
1475 }
1476 __kmp_sighldrs[sig] = NULL;
1477 __kmp_siginstalled[sig] = 0;
1478 KMP_MB(); // Flush all pending memory write invalidates.
1479 }
1480 } // __kmp_remove_one_handler
1481
1482 void __kmp_install_signals(int parallel_init) {
1483 KB_TRACE(10, ("__kmp_install_signals: called\n"));
1484 if (!__kmp_handle_signals) {
1485 KB_TRACE(10, ("__kmp_install_signals: KMP_HANDLE_SIGNALS is false - "
1486 "handlers not installed\n"));
1487 return;
1488 }
1489 __kmp_install_one_handler(SIGINT, __kmp_team_handler, parallel_init);
1490 __kmp_install_one_handler(SIGILL, __kmp_team_handler, parallel_init);
1491 __kmp_install_one_handler(SIGABRT, __kmp_team_handler, parallel_init);
1492 __kmp_install_one_handler(SIGFPE, __kmp_team_handler, parallel_init);
1493 __kmp_install_one_handler(SIGSEGV, __kmp_team_handler, parallel_init);
1494 __kmp_install_one_handler(SIGTERM, __kmp_team_handler, parallel_init);
1495 } // __kmp_install_signals
1496
1497 void __kmp_remove_signals(void) {
1498 int sig;
1499 KB_TRACE(10, ("__kmp_remove_signals: called\n"));
1500 for (sig = 1; sig < NSIG; ++sig) {
1501 __kmp_remove_one_handler(sig);
1502 }
1503 } // __kmp_remove_signals
1504
1505 #endif // KMP_HANDLE_SIGNALS
1506
1507 /* Put the thread to sleep for a time period */
1508 void __kmp_thread_sleep(int millis) {
1509 DWORD status;
1510
1511 status = SleepEx((DWORD)millis, FALSE);
1512 if (status) {
1513 DWORD error = GetLastError();
1514 __kmp_fatal(KMP_MSG(FunctionError, "SleepEx()"), KMP_ERR(error),
1515 __kmp_msg_null);
1516 }
1517 }
1518
1519 // Determine whether the given address is mapped into the current address space.
1520 int __kmp_is_address_mapped(void *addr) {
1521 MEMORY_BASIC_INFORMATION lpBuffer;
1522 SIZE_T dwLength;
1523
1524 dwLength = sizeof(MEMORY_BASIC_INFORMATION);
1525
1526 VirtualQuery(addr, &lpBuffer, dwLength);
1527
1528 return !(((lpBuffer.State == MEM_RESERVE) || (lpBuffer.State == MEM_FREE)) ||
1529 ((lpBuffer.Protect == PAGE_NOACCESS) ||
1530 (lpBuffer.Protect == PAGE_EXECUTE)));
1531 }
1532
1533 kmp_uint64 __kmp_hardware_timestamp(void) {
1534 kmp_uint64 r = 0;
1535
1536 QueryPerformanceCounter((LARGE_INTEGER *)&r);
1537 return r;
1538 }
1539
1540 /* Free handle and check the error code */
1541 void __kmp_free_handle(kmp_thread_t tHandle) {
1542 /* called with parameter type HANDLE also, thus suppose kmp_thread_t defined
1543 * as HANDLE */
1544 BOOL rc;
1545 rc = CloseHandle(tHandle);
1546 if (!rc) {
1547 DWORD error = GetLastError();
1548 __kmp_fatal(KMP_MSG(CantCloseHandle), KMP_ERR(error), __kmp_msg_null);
1549 }
1550 }
1551
1552 int __kmp_get_load_balance(int max) {
1553 static ULONG glb_buff_size = 100 * 1024;
1554
1555 // Saved count of the running threads for the thread balance algorithm
1556 static int glb_running_threads = 0;
1557 static double glb_call_time = 0; /* Thread balance algorithm call time */
1558
1559 int running_threads = 0; // Number of running threads in the system.
1560 NTSTATUS status = 0;
1561 ULONG buff_size = 0;
1562 ULONG info_size = 0;
1563 void *buffer = NULL;
1564 PSYSTEM_PROCESS_INFORMATION spi = NULL;
1565 int first_time = 1;
1566
1567 double call_time = 0.0; // start, finish;
1568
1569 __kmp_elapsed(&call_time);
1570
1571 if (glb_call_time &&
1572 (call_time - glb_call_time < __kmp_load_balance_interval)) {
1573 running_threads = glb_running_threads;
1574 goto finish;
1575 }
1576 glb_call_time = call_time;
1577
1578 // Do not spend time on running algorithm if we have a permanent error.
1579 if (NtQuerySystemInformation == NULL) {
1580 running_threads = -1;
1581 goto finish;
1582 }
1583
1584 if (max <= 0) {
1585 max = INT_MAX;
1586 }
1587
1588 do {
1589
1590 if (first_time) {
1591 buff_size = glb_buff_size;
1592 } else {
1593 buff_size = 2 * buff_size;
1594 }
1595
1596 buffer = KMP_INTERNAL_REALLOC(buffer, buff_size);
1597 if (buffer == NULL) {
1598 running_threads = -1;
1599 goto finish;
1600 }
1601 status = NtQuerySystemInformation(SystemProcessInformation, buffer,
1602 buff_size, &info_size);
1603 first_time = 0;
1604
1605 } while (status == STATUS_INFO_LENGTH_MISMATCH);
1606 glb_buff_size = buff_size;
1607
1608 #define CHECK(cond) \
1609 { \
1610 KMP_DEBUG_ASSERT(cond); \
1611 if (!(cond)) { \
1612 running_threads = -1; \
1613 goto finish; \
1614 } \
1615 }
1616
1617 CHECK(buff_size >= info_size);
1618 spi = PSYSTEM_PROCESS_INFORMATION(buffer);
1619 for (;;) {
1620 ptrdiff_t offset = uintptr_t(spi) - uintptr_t(buffer);
1621 CHECK(0 <= offset &&
1622 offset + sizeof(SYSTEM_PROCESS_INFORMATION) < info_size);
1623 HANDLE pid = spi->ProcessId;
1624 ULONG num = spi->NumberOfThreads;
1625 CHECK(num >= 1);
1626 size_t spi_size =
1627 sizeof(SYSTEM_PROCESS_INFORMATION) + sizeof(SYSTEM_THREAD) * (num - 1);
1628 CHECK(offset + spi_size <
1629 info_size); // Make sure process info record fits the buffer.
1630 if (spi->NextEntryOffset != 0) {
1631 CHECK(spi_size <=
1632 spi->NextEntryOffset); // And do not overlap with the next record.
1633 }
1634 // pid == 0 corresponds to the System Idle Process. It always has running
1635 // threads on all cores. So, we don't consider the running threads of this
1636 // process.
1637 if (pid != 0) {
1638 for (int i = 0; i < num; ++i) {
1639 THREAD_STATE state = spi->Threads[i].State;
1640 // Count threads that have Ready or Running state.
1641 // !!! TODO: Why comment does not match the code???
1642 if (state == StateRunning) {
1643 ++running_threads;
1644 // Stop counting running threads if the number is already greater than
1645 // the number of available cores
1646 if (running_threads >= max) {
1647 goto finish;
1648 }
1649 }
1650 }
1651 }
1652 if (spi->NextEntryOffset == 0) {
1653 break;
1654 }
1655 spi = PSYSTEM_PROCESS_INFORMATION(uintptr_t(spi) + spi->NextEntryOffset);
1656 }
1657
1658 #undef CHECK
1659
1660 finish: // Clean up and exit.
1661
1662 if (buffer != NULL) {
1663 KMP_INTERNAL_FREE(buffer);
1664 }
1665
1666 glb_running_threads = running_threads;
1667
1668 return running_threads;
1669 } //__kmp_get_load_balance()
1670
1671 // Find symbol from the loaded modules
1672 void *__kmp_lookup_symbol(const char *name, bool next) {
1673 HANDLE process = GetCurrentProcess();
1674 DWORD needed;
1675 HMODULE *modules = nullptr;
1676 if (!EnumProcessModules(process, modules, 0, &needed))
1677 return nullptr;
1678 DWORD num_modules = needed / sizeof(HMODULE);
1679 modules = (HMODULE *)malloc(num_modules * sizeof(HMODULE));
1680 if (!EnumProcessModules(process, modules, needed, &needed)) {
1681 free(modules);
1682 return nullptr;
1683 }
1684 HMODULE curr_module = nullptr;
1685 if (next) {
1686 // Current module needs to be skipped if next flag is true
1687 if (!GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
1688 (LPCTSTR)&__kmp_lookup_symbol, &curr_module)) {
1689 free(modules);
1690 return nullptr;
1691 }
1692 }
1693 void *proc = nullptr;
1694 for (uint32_t i = 0; i < num_modules; i++) {
1695 if (next && modules[i] == curr_module)
1696 continue;
1697 proc = (void *)GetProcAddress(modules[i], name);
1698 if (proc)
1699 break;
1700 }
1701 free(modules);
1702 return proc;
1703 }
1704
1705 // Functions for hidden helper task
1706 void __kmp_hidden_helper_worker_thread_wait() {
1707 KMP_ASSERT(0 && "Hidden helper task is not supported on Windows");
1708 }
1709
1710 void __kmp_do_initialize_hidden_helper_threads() {
1711 KMP_ASSERT(0 && "Hidden helper task is not supported on Windows");
1712 }
1713
1714 void __kmp_hidden_helper_threads_initz_wait() {
1715 KMP_ASSERT(0 && "Hidden helper task is not supported on Windows");
1716 }
1717
1718 void __kmp_hidden_helper_initz_release() {
1719 KMP_ASSERT(0 && "Hidden helper task is not supported on Windows");
1720 }
1721
1722 void __kmp_hidden_helper_main_thread_wait() {
1723 KMP_ASSERT(0 && "Hidden helper task is not supported on Windows");
1724 }
1725
1726 void __kmp_hidden_helper_main_thread_release() {
1727 KMP_ASSERT(0 && "Hidden helper task is not supported on Windows");
1728 }
1729
1730 void __kmp_hidden_helper_worker_thread_signal() {
1731 KMP_ASSERT(0 && "Hidden helper task is not supported on Windows");
1732 }
1733
1734 void __kmp_hidden_helper_threads_deinitz_wait() {
1735 KMP_ASSERT(0 && "Hidden helper task is not supported on Windows");
1736 }
1737
1738 void __kmp_hidden_helper_threads_deinitz_release() {
1739 KMP_ASSERT(0 && "Hidden helper task is not supported on Windows");
1740 }
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