PostgreSQL Source Code  git master
startup.c File Reference
#include "postgres.h"
#include "access/xlog.h"
#include "access/xlogrecovery.h"
#include "access/xlogutils.h"
#include "libpq/pqsignal.h"
#include "miscadmin.h"
#include "pgstat.h"
#include "postmaster/interrupt.h"
#include "postmaster/startup.h"
#include "storage/ipc.h"
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/procsignal.h"
#include "storage/standby.h"
#include "utils/guc.h"
#include "utils/memutils.h"
#include "utils/timeout.h"
Include dependency graph for startup.c:

Go to the source code of this file.

Macros

#define POSTMASTER_POLL_RATE_LIMIT   1024
 

Functions

static void StartupProcTriggerHandler (SIGNAL_ARGS)
 
static void StartupProcSigHupHandler (SIGNAL_ARGS)
 
static void StartupProcExit (int code, Datum arg)
 
static void StartupProcShutdownHandler (SIGNAL_ARGS)
 
static void StartupRereadConfig (void)
 
void HandleStartupProcInterrupts (void)
 
void StartupProcessMain (void)
 
void PreRestoreCommand (void)
 
void PostRestoreCommand (void)
 
bool IsPromoteSignaled (void)
 
void ResetPromoteSignaled (void)
 
void startup_progress_timeout_handler (void)
 
void begin_startup_progress_phase (void)
 
bool has_startup_progress_timeout_expired (long *secs, int *usecs)
 

Variables

static volatile sig_atomic_t got_SIGHUP = false
 
static volatile sig_atomic_t shutdown_requested = false
 
static volatile sig_atomic_t promote_signaled = false
 
static volatile sig_atomic_t in_restore_command = false
 
static TimestampTz startup_progress_phase_start_time
 
static volatile sig_atomic_t startup_progress_timer_expired = false
 
int log_startup_progress_interval = 10000
 

Macro Definition Documentation

◆ POSTMASTER_POLL_RATE_LIMIT

#define POSTMASTER_POLL_RATE_LIMIT   1024

Definition at line 48 of file startup.c.

Function Documentation

◆ begin_startup_progress_phase()

void begin_startup_progress_phase ( void  )

Definition at line 321 of file startup.c.

322 {
323  TimestampTz fin_time;
324 
325  /* Feature is disabled. */
327  return;
328 
336 }
static volatile sig_atomic_t startup_progress_timer_expired
Definition: startup.c:73
static TimestampTz startup_progress_phase_start_time
Definition: startup.c:67
int log_startup_progress_interval
Definition: startup.c:78
TimestampTz GetCurrentTimestamp(void)
Definition: timestamp.c:1574
int64 TimestampTz
Definition: timestamp.h:39
void enable_timeout_every(TimeoutId id, TimestampTz fin_time, int delay_ms)
Definition: timeout.c:588
void disable_timeout(TimeoutId id, bool keep_indicator)
Definition: timeout.c:689
@ STARTUP_PROGRESS_TIMEOUT
Definition: timeout.h:37
#define TimestampTzPlusMilliseconds(tz, ms)
Definition: timestamp.h:56

References disable_timeout(), enable_timeout_every(), GetCurrentTimestamp(), log_startup_progress_interval, startup_progress_phase_start_time, STARTUP_PROGRESS_TIMEOUT, startup_progress_timer_expired, and TimestampTzPlusMilliseconds.

Referenced by PerformWalRecovery(), ResetUnloggedRelations(), and SyncDataDirectory().

◆ HandleStartupProcInterrupts()

void HandleStartupProcInterrupts ( void  )

Definition at line 168 of file startup.c.

169 {
170 #ifdef POSTMASTER_POLL_RATE_LIMIT
171  static uint32 postmaster_poll_count = 0;
172 #endif
173 
174  /*
175  * Process any requests or signals received recently.
176  */
177  if (got_SIGHUP)
178  {
179  got_SIGHUP = false;
181  }
182 
183  /*
184  * Check if we were requested to exit without finishing recovery.
185  */
186  if (shutdown_requested)
187  proc_exit(1);
188 
189  /*
190  * Emergency bailout if postmaster has died. This is to avoid the
191  * necessity for manual cleanup of all postmaster children. Do this less
192  * frequently on systems for which we don't have signals to make that
193  * cheap.
194  */
195  if (IsUnderPostmaster &&
197  postmaster_poll_count++ % POSTMASTER_POLL_RATE_LIMIT == 0 &&
198 #endif
200  exit(1);
201 
202  /* Process barrier events */
205 
206  /* Perform logging of memory contexts of this process */
209 }
#define POSTMASTER_POLL_RATE_LIMIT
Definition: startup.c:48
static volatile sig_atomic_t shutdown_requested
Definition: startup.c:55
static volatile sig_atomic_t got_SIGHUP
Definition: startup.c:54
static void StartupRereadConfig(void)
Definition: startup.c:139
unsigned int uint32
Definition: c.h:452
volatile sig_atomic_t LogMemoryContextPending
Definition: globals.c:38
volatile sig_atomic_t ProcSignalBarrierPending
Definition: globals.c:37
bool IsUnderPostmaster
Definition: globals.c:113
void proc_exit(int code)
Definition: ipc.c:104
exit(1)
void ProcessLogMemoryContextInterrupt(void)
Definition: mcxt.c:1041
#define PostmasterIsAlive()
Definition: pmsignal.h:102
void ProcessProcSignalBarrier(void)
Definition: procsignal.c:467

References exit(), got_SIGHUP, IsUnderPostmaster, LogMemoryContextPending, POSTMASTER_POLL_RATE_LIMIT, PostmasterIsAlive, proc_exit(), ProcessLogMemoryContextInterrupt(), ProcessProcSignalBarrier(), ProcSignalBarrierPending, shutdown_requested, and StartupRereadConfig().

Referenced by PerformWalRecovery(), recoveryApplyDelay(), recoveryPausesHere(), RecoveryRequiresIntParameter(), and WaitForWALToBecomeAvailable().

◆ has_startup_progress_timeout_expired()

bool has_startup_progress_timeout_expired ( long *  secs,
int *  usecs 
)

Definition at line 344 of file startup.c.

345 {
346  long seconds;
347  int useconds;
349 
350  /* No timeout has occurred. */
352  return false;
353 
354  /* Calculate the elapsed time. */
357 
358  *secs = seconds;
359  *usecs = useconds;
361 
362  return true;
363 }
void TimestampDifference(TimestampTz start_time, TimestampTz stop_time, long *secs, int *microsecs)
Definition: timestamp.c:1650
Datum now(PG_FUNCTION_ARGS)
Definition: timestamp.c:1538

References GetCurrentTimestamp(), now(), startup_progress_phase_start_time, startup_progress_timer_expired, and TimestampDifference().

◆ IsPromoteSignaled()

bool IsPromoteSignaled ( void  )

Definition at line 297 of file startup.c.

298 {
299  return promote_signaled;
300 }
static volatile sig_atomic_t promote_signaled
Definition: startup.c:56

References promote_signaled.

Referenced by CheckForStandbyTrigger().

◆ PostRestoreCommand()

void PostRestoreCommand ( void  )

Definition at line 291 of file startup.c.

292 {
293  in_restore_command = false;
294 }
static volatile sig_atomic_t in_restore_command
Definition: startup.c:62

References in_restore_command.

Referenced by RestoreArchivedFile().

◆ PreRestoreCommand()

void PreRestoreCommand ( void  )

Definition at line 277 of file startup.c.

278 {
279  /*
280  * Set in_restore_command to tell the signal handler that we should exit
281  * right away on SIGTERM. We know that we're at a safe point to do that.
282  * Check if we had already received the signal, so that we don't miss a
283  * shutdown request received just before this.
284  */
285  in_restore_command = true;
286  if (shutdown_requested)
287  proc_exit(1);
288 }

References in_restore_command, proc_exit(), and shutdown_requested.

Referenced by RestoreArchivedFile().

◆ ResetPromoteSignaled()

void ResetPromoteSignaled ( void  )

Definition at line 303 of file startup.c.

304 {
305  promote_signaled = false;
306 }

References promote_signaled.

Referenced by CheckForStandbyTrigger().

◆ startup_progress_timeout_handler()

void startup_progress_timeout_handler ( void  )

Definition at line 312 of file startup.c.

313 {
315 }

References startup_progress_timer_expired.

Referenced by StartupXLOG().

◆ StartupProcessMain()

void StartupProcessMain ( void  )

Definition at line 230 of file startup.c.

231 {
232  /* Arrange to clean up at startup process exit */
234 
235  /*
236  * Properly accept or ignore signals the postmaster might send us.
237  */
238  pqsignal(SIGHUP, StartupProcSigHupHandler); /* reload config file */
239  pqsignal(SIGINT, SIG_IGN); /* ignore query cancel */
240  pqsignal(SIGTERM, StartupProcShutdownHandler); /* request shutdown */
241  /* SIGQUIT handler was already set up by InitPostmasterChild */
242  InitializeTimeouts(); /* establishes SIGALRM handler */
246 
247  /*
248  * Reset some signals that are accepted by postmaster but not here
249  */
251 
252  /*
253  * Register timeouts needed for standby mode
254  */
258 
259  /*
260  * Unblock signals (they were blocked when the postmaster forked us)
261  */
263 
264  /*
265  * Do what we came for.
266  */
267  StartupXLOG();
268 
269  /*
270  * Exit normally. Exit code 0 tells postmaster that we completed recovery
271  * successfully.
272  */
273  proc_exit(0);
274 }
sigset_t UnBlockSig
Definition: pqsignal.c:22
static void StartupProcExit(int code, Datum arg)
Definition: startup.c:217
static void StartupProcShutdownHandler(SIGNAL_ARGS)
Definition: startup.c:119
static void StartupProcSigHupHandler(SIGNAL_ARGS)
Definition: startup.c:107
static void StartupProcTriggerHandler(SIGNAL_ARGS)
Definition: startup.c:95
void on_shmem_exit(pg_on_exit_callback function, Datum arg)
Definition: ipc.c:361
#define PG_SETMASK(mask)
Definition: pqsignal.h:19
void procsignal_sigusr1_handler(SIGNAL_ARGS)
Definition: procsignal.c:638
pqsigfunc pqsignal(int signum, pqsigfunc handler)
Definition: signal.c:180
void StandbyTimeoutHandler(void)
Definition: standby.c:907
void StandbyLockTimeoutHandler(void)
Definition: standby.c:916
void StandbyDeadLockHandler(void)
Definition: standby.c:898
void InitializeTimeouts(void)
Definition: timeout.c:474
TimeoutId RegisterTimeout(TimeoutId id, timeout_handler_proc handler)
Definition: timeout.c:509
@ STANDBY_LOCK_TIMEOUT
Definition: timeout.h:32
@ STANDBY_DEADLOCK_TIMEOUT
Definition: timeout.h:30
@ STANDBY_TIMEOUT
Definition: timeout.h:31
#define SIGCHLD
Definition: win32_port.h:177
#define SIGHUP
Definition: win32_port.h:167
#define SIG_DFL
Definition: win32_port.h:162
#define SIGPIPE
Definition: win32_port.h:172
#define SIGUSR1
Definition: win32_port.h:179
#define SIGUSR2
Definition: win32_port.h:180
#define SIG_IGN
Definition: win32_port.h:164
void StartupXLOG(void)
Definition: xlog.c:4886

References InitializeTimeouts(), on_shmem_exit(), PG_SETMASK, pqsignal(), proc_exit(), procsignal_sigusr1_handler(), RegisterTimeout(), SIG_DFL, SIG_IGN, SIGCHLD, SIGHUP, SIGPIPE, SIGUSR1, SIGUSR2, STANDBY_DEADLOCK_TIMEOUT, STANDBY_LOCK_TIMEOUT, STANDBY_TIMEOUT, StandbyDeadLockHandler(), StandbyLockTimeoutHandler(), StandbyTimeoutHandler(), StartupProcExit(), StartupProcShutdownHandler(), StartupProcSigHupHandler(), StartupProcTriggerHandler(), StartupXLOG(), and UnBlockSig.

Referenced by AuxiliaryProcessMain().

◆ StartupProcExit()

static void StartupProcExit ( int  code,
Datum  arg 
)
static

Definition at line 217 of file startup.c.

218 {
219  /* Shutdown the recovery environment */
222 }
void ShutdownRecoveryTransactionEnvironment(void)
Definition: standby.c:140
HotStandbyState standbyState
Definition: xlogutils.c:56
@ STANDBY_DISABLED
Definition: xlogutils.h:49

References ShutdownRecoveryTransactionEnvironment(), STANDBY_DISABLED, and standbyState.

Referenced by StartupProcessMain().

◆ StartupProcShutdownHandler()

static void StartupProcShutdownHandler ( SIGNAL_ARGS  )
static

Definition at line 119 of file startup.c.

120 {
121  int save_errno = errno;
122 
123  if (in_restore_command)
124  proc_exit(1);
125  else
126  shutdown_requested = true;
127  WakeupRecovery();
128 
129  errno = save_errno;
130 }
void WakeupRecovery(void)

References in_restore_command, proc_exit(), shutdown_requested, and WakeupRecovery().

Referenced by StartupProcessMain().

◆ StartupProcSigHupHandler()

static void StartupProcSigHupHandler ( SIGNAL_ARGS  )
static

Definition at line 107 of file startup.c.

108 {
109  int save_errno = errno;
110 
111  got_SIGHUP = true;
112  WakeupRecovery();
113 
114  errno = save_errno;
115 }

References got_SIGHUP, and WakeupRecovery().

Referenced by StartupProcessMain().

◆ StartupProcTriggerHandler()

static void StartupProcTriggerHandler ( SIGNAL_ARGS  )
static

Definition at line 95 of file startup.c.

96 {
97  int save_errno = errno;
98 
99  promote_signaled = true;
100  WakeupRecovery();
101 
102  errno = save_errno;
103 }

References promote_signaled, and WakeupRecovery().

Referenced by StartupProcessMain().

◆ StartupRereadConfig()

static void StartupRereadConfig ( void  )
static

Definition at line 139 of file startup.c.

140 {
141  char *conninfo = pstrdup(PrimaryConnInfo);
142  char *slotname = pstrdup(PrimarySlotName);
143  bool tempSlot = wal_receiver_create_temp_slot;
144  bool conninfoChanged;
145  bool slotnameChanged;
146  bool tempSlotChanged = false;
147 
149 
150  conninfoChanged = strcmp(conninfo, PrimaryConnInfo) != 0;
151  slotnameChanged = strcmp(slotname, PrimarySlotName) != 0;
152 
153  /*
154  * wal_receiver_create_temp_slot is used only when we have no slot
155  * configured. We do not need to track this change if it has no effect.
156  */
157  if (!slotnameChanged && strcmp(PrimarySlotName, "") == 0)
158  tempSlotChanged = tempSlot != wal_receiver_create_temp_slot;
159  pfree(conninfo);
160  pfree(slotname);
161 
162  if (conninfoChanged || slotnameChanged || tempSlotChanged)
164 }
@ PGC_SIGHUP
Definition: guc.h:72
void ProcessConfigFile(GucContext context)
char * pstrdup(const char *in)
Definition: mcxt.c:1305
void pfree(void *pointer)
Definition: mcxt.c:1175
void StartupRequestWalReceiverRestart(void)
char * PrimarySlotName
Definition: xlogrecovery.c:93
bool wal_receiver_create_temp_slot
Definition: xlogrecovery.c:95
char * PrimaryConnInfo
Definition: xlogrecovery.c:92

References pfree(), PGC_SIGHUP, PrimaryConnInfo, PrimarySlotName, ProcessConfigFile(), pstrdup(), StartupRequestWalReceiverRestart(), and wal_receiver_create_temp_slot.

Referenced by HandleStartupProcInterrupts().

Variable Documentation

◆ got_SIGHUP

volatile sig_atomic_t got_SIGHUP = false
static

Definition at line 54 of file startup.c.

Referenced by HandleStartupProcInterrupts(), and StartupProcSigHupHandler().

◆ in_restore_command

volatile sig_atomic_t in_restore_command = false
static

Definition at line 62 of file startup.c.

Referenced by PostRestoreCommand(), PreRestoreCommand(), and StartupProcShutdownHandler().

◆ log_startup_progress_interval

int log_startup_progress_interval = 10000

Definition at line 78 of file startup.c.

Referenced by begin_startup_progress_phase().

◆ promote_signaled

volatile sig_atomic_t promote_signaled = false
static

Definition at line 56 of file startup.c.

Referenced by IsPromoteSignaled(), ResetPromoteSignaled(), and StartupProcTriggerHandler().

◆ shutdown_requested

volatile sig_atomic_t shutdown_requested = false
static

◆ startup_progress_phase_start_time

TimestampTz startup_progress_phase_start_time
static

Definition at line 67 of file startup.c.

Referenced by begin_startup_progress_phase(), and has_startup_progress_timeout_expired().

◆ startup_progress_timer_expired

volatile sig_atomic_t startup_progress_timer_expired = false
static