Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * procsignal.c
4 : * Routines for interprocess signaling
5 : *
6 : *
7 : * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
8 : * Portions Copyright (c) 1994, Regents of the University of California
9 : *
10 : * IDENTIFICATION
11 : * src/backend/storage/ipc/procsignal.c
12 : *
13 : *-------------------------------------------------------------------------
14 : */
15 : #include "postgres.h"
16 :
17 : #include <signal.h>
18 : #include <unistd.h>
19 :
20 : #include "access/parallel.h"
21 : #include "commands/async.h"
22 : #include "miscadmin.h"
23 : #include "pgstat.h"
24 : #include "port/pg_bitutils.h"
25 : #include "replication/logicalworker.h"
26 : #include "replication/walsender.h"
27 : #include "storage/condition_variable.h"
28 : #include "storage/ipc.h"
29 : #include "storage/latch.h"
30 : #include "storage/shmem.h"
31 : #include "storage/sinval.h"
32 : #include "storage/smgr.h"
33 : #include "tcop/tcopprot.h"
34 : #include "utils/memutils.h"
35 :
36 : /*
37 : * The SIGUSR1 signal is multiplexed to support signaling multiple event
38 : * types. The specific reason is communicated via flags in shared memory.
39 : * We keep a boolean flag for each possible "reason", so that different
40 : * reasons can be signaled to a process concurrently. (However, if the same
41 : * reason is signaled more than once nearly simultaneously, the process may
42 : * observe it only once.)
43 : *
44 : * Each process that wants to receive signals registers its process ID
45 : * in the ProcSignalSlots array. The array is indexed by ProcNumber to make
46 : * slot allocation simple, and to avoid having to search the array when you
47 : * know the ProcNumber of the process you're signaling. (We do support
48 : * signaling without ProcNumber, but it's a bit less efficient.)
49 : *
50 : * The flags are actually declared as "volatile sig_atomic_t" for maximum
51 : * portability. This should ensure that loads and stores of the flag
52 : * values are atomic, allowing us to dispense with any explicit locking.
53 : *
54 : * pss_signalFlags are intended to be set in cases where we don't need to
55 : * keep track of whether or not the target process has handled the signal,
56 : * but sometimes we need confirmation, as when making a global state change
57 : * that cannot be considered complete until all backends have taken notice
58 : * of it. For such use cases, we set a bit in pss_barrierCheckMask and then
59 : * increment the current "barrier generation"; when the new barrier generation
60 : * (or greater) appears in the pss_barrierGeneration flag of every process,
61 : * we know that the message has been received everywhere.
62 : */
63 : typedef struct
64 : {
65 : volatile pid_t pss_pid;
66 : volatile sig_atomic_t pss_signalFlags[NUM_PROCSIGNALS];
67 : pg_atomic_uint64 pss_barrierGeneration;
68 : pg_atomic_uint32 pss_barrierCheckMask;
69 : ConditionVariable pss_barrierCV;
70 : } ProcSignalSlot;
71 :
72 : /*
73 : * Information that is global to the entire ProcSignal system can be stored
74 : * here.
75 : *
76 : * psh_barrierGeneration is the highest barrier generation in existence.
77 : */
78 : typedef struct
79 : {
80 : pg_atomic_uint64 psh_barrierGeneration;
81 : ProcSignalSlot psh_slot[FLEXIBLE_ARRAY_MEMBER];
82 : } ProcSignalHeader;
83 :
84 : /*
85 : * We reserve a slot for each possible ProcNumber, plus one for each
86 : * possible auxiliary process type. (This scheme assumes there is not
87 : * more than one of any auxiliary process type at a time.)
88 : */
89 : #define NumProcSignalSlots (MaxBackends + NUM_AUXILIARY_PROCS)
90 :
91 : /* Check whether the relevant type bit is set in the flags. */
92 : #define BARRIER_SHOULD_CHECK(flags, type) \
93 : (((flags) & (((uint32) 1) << (uint32) (type))) != 0)
94 :
95 : /* Clear the relevant type bit from the flags. */
96 : #define BARRIER_CLEAR_BIT(flags, type) \
97 : ((flags) &= ~(((uint32) 1) << (uint32) (type)))
98 :
99 : static ProcSignalHeader *ProcSignal = NULL;
100 : static ProcSignalSlot *MyProcSignalSlot = NULL;
101 :
102 : static bool CheckProcSignal(ProcSignalReason reason);
103 : static void CleanupProcSignalState(int status, Datum arg);
104 : static void ResetProcSignalBarrierBits(uint32 flags);
105 :
106 : /*
107 : * ProcSignalShmemSize
108 : * Compute space needed for ProcSignal's shared memory
109 : */
110 : Size
111 5066 : ProcSignalShmemSize(void)
112 : {
113 : Size size;
114 :
115 5066 : size = mul_size(NumProcSignalSlots, sizeof(ProcSignalSlot));
116 5066 : size = add_size(size, offsetof(ProcSignalHeader, psh_slot));
117 5066 : return size;
118 : }
119 :
120 : /*
121 : * ProcSignalShmemInit
122 : * Allocate and initialize ProcSignal's shared memory
123 : */
124 : void
125 1768 : ProcSignalShmemInit(void)
126 : {
127 1768 : Size size = ProcSignalShmemSize();
128 : bool found;
129 :
130 1768 : ProcSignal = (ProcSignalHeader *)
131 1768 : ShmemInitStruct("ProcSignal", size, &found);
132 :
133 : /* If we're first, initialize. */
134 1768 : if (!found)
135 : {
136 : int i;
137 :
138 1768 : pg_atomic_init_u64(&ProcSignal->psh_barrierGeneration, 0);
139 :
140 158636 : for (i = 0; i < NumProcSignalSlots; ++i)
141 : {
142 156868 : ProcSignalSlot *slot = &ProcSignal->psh_slot[i];
143 :
144 156868 : slot->pss_pid = 0;
145 156868 : MemSet(slot->pss_signalFlags, 0, sizeof(slot->pss_signalFlags));
146 156868 : pg_atomic_init_u64(&slot->pss_barrierGeneration, PG_UINT64_MAX);
147 156868 : pg_atomic_init_u32(&slot->pss_barrierCheckMask, 0);
148 156868 : ConditionVariableInit(&slot->pss_barrierCV);
149 : }
150 : }
151 1768 : }
152 :
153 : /*
154 : * ProcSignalInit
155 : * Register the current process in the ProcSignal array
156 : */
157 : void
158 29868 : ProcSignalInit(void)
159 : {
160 : ProcSignalSlot *slot;
161 : uint64 barrier_generation;
162 :
163 29868 : if (MyProcNumber < 0)
164 0 : elog(ERROR, "MyProcNumber not set");
165 29868 : if (MyProcNumber >= NumProcSignalSlots)
166 0 : elog(ERROR, "unexpected MyProcNumber %d in ProcSignalInit (max %d)", MyProcNumber, NumProcSignalSlots);
167 29868 : slot = &ProcSignal->psh_slot[MyProcNumber];
168 :
169 : /* sanity check */
170 29868 : if (slot->pss_pid != 0)
171 0 : elog(LOG, "process %d taking over ProcSignal slot %d, but it's not empty",
172 : MyProcPid, MyProcNumber);
173 :
174 : /* Clear out any leftover signal reasons */
175 29868 : MemSet(slot->pss_signalFlags, 0, NUM_PROCSIGNALS * sizeof(sig_atomic_t));
176 :
177 : /*
178 : * Initialize barrier state. Since we're a brand-new process, there
179 : * shouldn't be any leftover backend-private state that needs to be
180 : * updated. Therefore, we can broadcast the latest barrier generation and
181 : * disregard any previously-set check bits.
182 : *
183 : * NB: This only works if this initialization happens early enough in the
184 : * startup sequence that we haven't yet cached any state that might need
185 : * to be invalidated. That's also why we have a memory barrier here, to be
186 : * sure that any later reads of memory happen strictly after this.
187 : */
188 29868 : pg_atomic_write_u32(&slot->pss_barrierCheckMask, 0);
189 : barrier_generation =
190 29868 : pg_atomic_read_u64(&ProcSignal->psh_barrierGeneration);
191 29868 : pg_atomic_write_u64(&slot->pss_barrierGeneration, barrier_generation);
192 29868 : pg_memory_barrier();
193 :
194 : /* Mark slot with my PID */
195 29868 : slot->pss_pid = MyProcPid;
196 :
197 : /* Remember slot location for CheckProcSignal */
198 29868 : MyProcSignalSlot = slot;
199 :
200 : /* Set up to release the slot on process exit */
201 29868 : on_shmem_exit(CleanupProcSignalState, (Datum) 0);
202 29868 : }
203 :
204 : /*
205 : * CleanupProcSignalState
206 : * Remove current process from ProcSignal mechanism
207 : *
208 : * This function is called via on_shmem_exit() during backend shutdown.
209 : */
210 : static void
211 29868 : CleanupProcSignalState(int status, Datum arg)
212 : {
213 29868 : ProcSignalSlot *slot = MyProcSignalSlot;
214 :
215 : /*
216 : * Clear MyProcSignalSlot, so that a SIGUSR1 received after this point
217 : * won't try to access it after it's no longer ours (and perhaps even
218 : * after we've unmapped the shared memory segment).
219 : */
220 : Assert(MyProcSignalSlot != NULL);
221 29868 : MyProcSignalSlot = NULL;
222 :
223 : /* sanity check */
224 29868 : if (slot->pss_pid != MyProcPid)
225 : {
226 : /*
227 : * don't ERROR here. We're exiting anyway, and don't want to get into
228 : * infinite loop trying to exit
229 : */
230 0 : elog(LOG, "process %d releasing ProcSignal slot %d, but it contains %d",
231 : MyProcPid, (int) (slot - ProcSignal->psh_slot), (int) slot->pss_pid);
232 0 : return; /* XXX better to zero the slot anyway? */
233 : }
234 :
235 : /*
236 : * Make this slot look like it's absorbed all possible barriers, so that
237 : * no barrier waits block on it.
238 : */
239 29868 : pg_atomic_write_u64(&slot->pss_barrierGeneration, PG_UINT64_MAX);
240 29868 : ConditionVariableBroadcast(&slot->pss_barrierCV);
241 :
242 29868 : slot->pss_pid = 0;
243 : }
244 :
245 : /*
246 : * SendProcSignal
247 : * Send a signal to a Postgres process
248 : *
249 : * Providing procNumber is optional, but it will speed up the operation.
250 : *
251 : * On success (a signal was sent), zero is returned.
252 : * On error, -1 is returned, and errno is set (typically to ESRCH or EPERM).
253 : *
254 : * Not to be confused with ProcSendSignal
255 : */
256 : int
257 10662 : SendProcSignal(pid_t pid, ProcSignalReason reason, ProcNumber procNumber)
258 : {
259 : volatile ProcSignalSlot *slot;
260 :
261 10662 : if (procNumber != INVALID_PROC_NUMBER)
262 : {
263 10562 : slot = &ProcSignal->psh_slot[procNumber];
264 :
265 : /*
266 : * Note: Since there's no locking, it's possible that the target
267 : * process detaches from shared memory and exits right after this
268 : * test, before we set the flag and send signal. And the signal slot
269 : * might even be recycled by a new process, so it's remotely possible
270 : * that we set a flag for a wrong process. That's OK, all the signals
271 : * are such that no harm is done if they're mistakenly fired.
272 : */
273 10562 : if (slot->pss_pid == pid)
274 : {
275 : /* Atomically set the proper flag */
276 10562 : slot->pss_signalFlags[reason] = true;
277 : /* Send signal */
278 10562 : return kill(pid, SIGUSR1);
279 : }
280 : }
281 : else
282 : {
283 : /*
284 : * Pronumber not provided, so search the array using pid. We search
285 : * the array back to front so as to reduce search overhead. Passing
286 : * INVALID_PROC_NUMBER means that the target is most likely an
287 : * auxiliary process, which will have a slot near the end of the
288 : * array.
289 : */
290 : int i;
291 :
292 1216 : for (i = NumProcSignalSlots - 1; i >= 0; i--)
293 : {
294 1216 : slot = &ProcSignal->psh_slot[i];
295 :
296 1216 : if (slot->pss_pid == pid)
297 : {
298 : /* the above note about race conditions applies here too */
299 :
300 : /* Atomically set the proper flag */
301 100 : slot->pss_signalFlags[reason] = true;
302 : /* Send signal */
303 100 : return kill(pid, SIGUSR1);
304 : }
305 : }
306 : }
307 :
308 0 : errno = ESRCH;
309 0 : return -1;
310 : }
311 :
312 : /*
313 : * EmitProcSignalBarrier
314 : * Send a signal to every Postgres process
315 : *
316 : * The return value of this function is the barrier "generation" created
317 : * by this operation. This value can be passed to WaitForProcSignalBarrier
318 : * to wait until it is known that every participant in the ProcSignal
319 : * mechanism has absorbed the signal (or started afterwards).
320 : *
321 : * Note that it would be a bad idea to use this for anything that happens
322 : * frequently, as interrupting every backend could cause a noticeable
323 : * performance hit.
324 : *
325 : * Callers are entitled to assume that this function will not throw ERROR
326 : * or FATAL.
327 : */
328 : uint64
329 142 : EmitProcSignalBarrier(ProcSignalBarrierType type)
330 : {
331 142 : uint32 flagbit = 1 << (uint32) type;
332 : uint64 generation;
333 :
334 : /*
335 : * Set all the flags.
336 : *
337 : * Note that pg_atomic_fetch_or_u32 has full barrier semantics, so this is
338 : * totally ordered with respect to anything the caller did before, and
339 : * anything that we do afterwards. (This is also true of the later call to
340 : * pg_atomic_add_fetch_u64.)
341 : */
342 9882 : for (int i = 0; i < NumProcSignalSlots; i++)
343 : {
344 9740 : volatile ProcSignalSlot *slot = &ProcSignal->psh_slot[i];
345 :
346 9740 : pg_atomic_fetch_or_u32(&slot->pss_barrierCheckMask, flagbit);
347 : }
348 :
349 : /*
350 : * Increment the generation counter.
351 : */
352 : generation =
353 142 : pg_atomic_add_fetch_u64(&ProcSignal->psh_barrierGeneration, 1);
354 :
355 : /*
356 : * Signal all the processes, so that they update their advertised barrier
357 : * generation.
358 : *
359 : * Concurrency is not a problem here. Backends that have exited don't
360 : * matter, and new backends that have joined since we entered this
361 : * function must already have current state, since the caller is
362 : * responsible for making sure that the relevant state is entirely visible
363 : * before calling this function in the first place. We still have to wake
364 : * them up - because we can't distinguish between such backends and older
365 : * backends that need to update state - but they won't actually need to
366 : * change any state.
367 : */
368 9882 : for (int i = NumProcSignalSlots - 1; i >= 0; i--)
369 : {
370 9740 : volatile ProcSignalSlot *slot = &ProcSignal->psh_slot[i];
371 9740 : pid_t pid = slot->pss_pid;
372 :
373 9740 : if (pid != 0)
374 : {
375 : /* see SendProcSignal for details */
376 818 : slot->pss_signalFlags[PROCSIG_BARRIER] = true;
377 818 : kill(pid, SIGUSR1);
378 : }
379 : }
380 :
381 142 : return generation;
382 : }
383 :
384 : /*
385 : * WaitForProcSignalBarrier - wait until it is guaranteed that all changes
386 : * requested by a specific call to EmitProcSignalBarrier() have taken effect.
387 : */
388 : void
389 142 : WaitForProcSignalBarrier(uint64 generation)
390 : {
391 : Assert(generation <= pg_atomic_read_u64(&ProcSignal->psh_barrierGeneration));
392 :
393 142 : elog(DEBUG1,
394 : "waiting for all backends to process ProcSignalBarrier generation "
395 : UINT64_FORMAT,
396 : generation);
397 :
398 9882 : for (int i = NumProcSignalSlots - 1; i >= 0; i--)
399 : {
400 9740 : ProcSignalSlot *slot = &ProcSignal->psh_slot[i];
401 : uint64 oldval;
402 :
403 : /*
404 : * It's important that we check only pss_barrierGeneration here and
405 : * not pss_barrierCheckMask. Bits in pss_barrierCheckMask get cleared
406 : * before the barrier is actually absorbed, but pss_barrierGeneration
407 : * is updated only afterward.
408 : */
409 9740 : oldval = pg_atomic_read_u64(&slot->pss_barrierGeneration);
410 10150 : while (oldval < generation)
411 : {
412 410 : if (ConditionVariableTimedSleep(&slot->pss_barrierCV,
413 : 5000,
414 : WAIT_EVENT_PROC_SIGNAL_BARRIER))
415 0 : ereport(LOG,
416 : (errmsg("still waiting for backend with PID %d to accept ProcSignalBarrier",
417 : (int) slot->pss_pid)));
418 410 : oldval = pg_atomic_read_u64(&slot->pss_barrierGeneration);
419 : }
420 9740 : ConditionVariableCancelSleep();
421 : }
422 :
423 142 : elog(DEBUG1,
424 : "finished waiting for all backends to process ProcSignalBarrier generation "
425 : UINT64_FORMAT,
426 : generation);
427 :
428 : /*
429 : * The caller is probably calling this function because it wants to read
430 : * the shared state or perform further writes to shared state once all
431 : * backends are known to have absorbed the barrier. However, the read of
432 : * pss_barrierGeneration was performed unlocked; insert a memory barrier
433 : * to separate it from whatever follows.
434 : */
435 142 : pg_memory_barrier();
436 142 : }
437 :
438 : /*
439 : * Handle receipt of an interrupt indicating a global barrier event.
440 : *
441 : * All the actual work is deferred to ProcessProcSignalBarrier(), because we
442 : * cannot safely access the barrier generation inside the signal handler as
443 : * 64bit atomics might use spinlock based emulation, even for reads. As this
444 : * routine only gets called when PROCSIG_BARRIER is sent that won't cause a
445 : * lot of unnecessary work.
446 : */
447 : static void
448 570 : HandleProcSignalBarrierInterrupt(void)
449 : {
450 570 : InterruptPending = true;
451 570 : ProcSignalBarrierPending = true;
452 : /* latch will be set by procsignal_sigusr1_handler */
453 570 : }
454 :
455 : /*
456 : * Perform global barrier related interrupt checking.
457 : *
458 : * Any backend that participates in ProcSignal signaling must arrange to
459 : * call this function periodically. It is called from CHECK_FOR_INTERRUPTS(),
460 : * which is enough for normal backends, but not necessarily for all types of
461 : * background processes.
462 : */
463 : void
464 570 : ProcessProcSignalBarrier(void)
465 : {
466 : uint64 local_gen;
467 : uint64 shared_gen;
468 : volatile uint32 flags;
469 :
470 : Assert(MyProcSignalSlot);
471 :
472 : /* Exit quickly if there's no work to do. */
473 570 : if (!ProcSignalBarrierPending)
474 0 : return;
475 570 : ProcSignalBarrierPending = false;
476 :
477 : /*
478 : * It's not unlikely to process multiple barriers at once, before the
479 : * signals for all the barriers have arrived. To avoid unnecessary work in
480 : * response to subsequent signals, exit early if we already have processed
481 : * all of them.
482 : */
483 570 : local_gen = pg_atomic_read_u64(&MyProcSignalSlot->pss_barrierGeneration);
484 570 : shared_gen = pg_atomic_read_u64(&ProcSignal->psh_barrierGeneration);
485 :
486 : Assert(local_gen <= shared_gen);
487 :
488 570 : if (local_gen == shared_gen)
489 0 : return;
490 :
491 : /*
492 : * Get and clear the flags that are set for this backend. Note that
493 : * pg_atomic_exchange_u32 is a full barrier, so we're guaranteed that the
494 : * read of the barrier generation above happens before we atomically
495 : * extract the flags, and that any subsequent state changes happen
496 : * afterward.
497 : *
498 : * NB: In order to avoid race conditions, we must zero
499 : * pss_barrierCheckMask first and only afterwards try to do barrier
500 : * processing. If we did it in the other order, someone could send us
501 : * another barrier of some type right after we called the
502 : * barrier-processing function but before we cleared the bit. We would
503 : * have no way of knowing that the bit needs to stay set in that case, so
504 : * the need to call the barrier-processing function again would just get
505 : * forgotten. So instead, we tentatively clear all the bits and then put
506 : * back any for which we don't manage to successfully absorb the barrier.
507 : */
508 570 : flags = pg_atomic_exchange_u32(&MyProcSignalSlot->pss_barrierCheckMask, 0);
509 :
510 : /*
511 : * If there are no flags set, then we can skip doing any real work.
512 : * Otherwise, establish a PG_TRY block, so that we don't lose track of
513 : * which types of barrier processing are needed if an ERROR occurs.
514 : */
515 570 : if (flags != 0)
516 : {
517 570 : bool success = true;
518 :
519 570 : PG_TRY();
520 : {
521 : /*
522 : * Process each type of barrier. The barrier-processing functions
523 : * should normally return true, but may return false if the
524 : * barrier can't be absorbed at the current time. This should be
525 : * rare, because it's pretty expensive. Every single
526 : * CHECK_FOR_INTERRUPTS() will return here until we manage to
527 : * absorb the barrier, and that cost will add up in a hurry.
528 : *
529 : * NB: It ought to be OK to call the barrier-processing functions
530 : * unconditionally, but it's more efficient to call only the ones
531 : * that might need us to do something based on the flags.
532 : */
533 1140 : while (flags != 0)
534 : {
535 : ProcSignalBarrierType type;
536 570 : bool processed = true;
537 :
538 570 : type = (ProcSignalBarrierType) pg_rightmost_one_pos32(flags);
539 570 : switch (type)
540 : {
541 570 : case PROCSIGNAL_BARRIER_SMGRRELEASE:
542 570 : processed = ProcessBarrierSmgrRelease();
543 570 : break;
544 : }
545 :
546 : /*
547 : * To avoid an infinite loop, we must always unset the bit in
548 : * flags.
549 : */
550 570 : BARRIER_CLEAR_BIT(flags, type);
551 :
552 : /*
553 : * If we failed to process the barrier, reset the shared bit
554 : * so we try again later, and set a flag so that we don't bump
555 : * our generation.
556 : */
557 570 : if (!processed)
558 : {
559 0 : ResetProcSignalBarrierBits(((uint32) 1) << type);
560 0 : success = false;
561 : }
562 : }
563 : }
564 0 : PG_CATCH();
565 : {
566 : /*
567 : * If an ERROR occurred, we'll need to try again later to handle
568 : * that barrier type and any others that haven't been handled yet
569 : * or weren't successfully absorbed.
570 : */
571 0 : ResetProcSignalBarrierBits(flags);
572 0 : PG_RE_THROW();
573 : }
574 570 : PG_END_TRY();
575 :
576 : /*
577 : * If some barrier types were not successfully absorbed, we will have
578 : * to try again later.
579 : */
580 570 : if (!success)
581 0 : return;
582 : }
583 :
584 : /*
585 : * State changes related to all types of barriers that might have been
586 : * emitted have now been handled, so we can update our notion of the
587 : * generation to the one we observed before beginning the updates. If
588 : * things have changed further, it'll get fixed up when this function is
589 : * next called.
590 : */
591 570 : pg_atomic_write_u64(&MyProcSignalSlot->pss_barrierGeneration, shared_gen);
592 570 : ConditionVariableBroadcast(&MyProcSignalSlot->pss_barrierCV);
593 : }
594 :
595 : /*
596 : * If it turns out that we couldn't absorb one or more barrier types, either
597 : * because the barrier-processing functions returned false or due to an error,
598 : * arrange for processing to be retried later.
599 : */
600 : static void
601 0 : ResetProcSignalBarrierBits(uint32 flags)
602 : {
603 0 : pg_atomic_fetch_or_u32(&MyProcSignalSlot->pss_barrierCheckMask, flags);
604 0 : ProcSignalBarrierPending = true;
605 0 : InterruptPending = true;
606 0 : }
607 :
608 : /*
609 : * CheckProcSignal - check to see if a particular reason has been
610 : * signaled, and clear the signal flag. Should be called after receiving
611 : * SIGUSR1.
612 : */
613 : static bool
614 251104 : CheckProcSignal(ProcSignalReason reason)
615 : {
616 251104 : volatile ProcSignalSlot *slot = MyProcSignalSlot;
617 :
618 251104 : if (slot != NULL)
619 : {
620 : /* Careful here --- don't clear flag if we haven't seen it set */
621 251048 : if (slot->pss_signalFlags[reason])
622 : {
623 9260 : slot->pss_signalFlags[reason] = false;
624 9260 : return true;
625 : }
626 : }
627 :
628 241844 : return false;
629 : }
630 :
631 : /*
632 : * procsignal_sigusr1_handler - handle SIGUSR1 signal.
633 : */
634 : void
635 17936 : procsignal_sigusr1_handler(SIGNAL_ARGS)
636 : {
637 17936 : if (CheckProcSignal(PROCSIG_CATCHUP_INTERRUPT))
638 5156 : HandleCatchupInterrupt();
639 :
640 17936 : if (CheckProcSignal(PROCSIG_NOTIFY_INTERRUPT))
641 40 : HandleNotifyInterrupt();
642 :
643 17936 : if (CheckProcSignal(PROCSIG_PARALLEL_MESSAGE))
644 3350 : HandleParallelMessageInterrupt();
645 :
646 17936 : if (CheckProcSignal(PROCSIG_WALSND_INIT_STOPPING))
647 60 : HandleWalSndInitStopping();
648 :
649 17936 : if (CheckProcSignal(PROCSIG_BARRIER))
650 570 : HandleProcSignalBarrierInterrupt();
651 :
652 17936 : if (CheckProcSignal(PROCSIG_LOG_MEMORY_CONTEXT))
653 18 : HandleLogMemoryContextInterrupt();
654 :
655 17936 : if (CheckProcSignal(PROCSIG_PARALLEL_APPLY_MESSAGE))
656 28 : HandleParallelApplyMessageInterrupt();
657 :
658 17936 : if (CheckProcSignal(PROCSIG_RECOVERY_CONFLICT_DATABASE))
659 4 : HandleRecoveryConflictInterrupt(PROCSIG_RECOVERY_CONFLICT_DATABASE);
660 :
661 17936 : if (CheckProcSignal(PROCSIG_RECOVERY_CONFLICT_TABLESPACE))
662 2 : HandleRecoveryConflictInterrupt(PROCSIG_RECOVERY_CONFLICT_TABLESPACE);
663 :
664 17936 : if (CheckProcSignal(PROCSIG_RECOVERY_CONFLICT_LOCK))
665 2 : HandleRecoveryConflictInterrupt(PROCSIG_RECOVERY_CONFLICT_LOCK);
666 :
667 17936 : if (CheckProcSignal(PROCSIG_RECOVERY_CONFLICT_SNAPSHOT))
668 2 : HandleRecoveryConflictInterrupt(PROCSIG_RECOVERY_CONFLICT_SNAPSHOT);
669 :
670 17936 : if (CheckProcSignal(PROCSIG_RECOVERY_CONFLICT_LOGICALSLOT))
671 10 : HandleRecoveryConflictInterrupt(PROCSIG_RECOVERY_CONFLICT_LOGICALSLOT);
672 :
673 17936 : if (CheckProcSignal(PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK))
674 16 : HandleRecoveryConflictInterrupt(PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK);
675 :
676 17936 : if (CheckProcSignal(PROCSIG_RECOVERY_CONFLICT_BUFFERPIN))
677 2 : HandleRecoveryConflictInterrupt(PROCSIG_RECOVERY_CONFLICT_BUFFERPIN);
678 :
679 17936 : SetLatch(MyLatch);
680 17936 : }
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