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tcopprot.h File Reference
#include "nodes/params.h"
#include "nodes/parsenodes.h"
#include "nodes/plannodes.h"
#include "storage/procsignal.h"
#include "utils/guc.h"
Include dependency graph for tcopprot.h:
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Macros

#define STACK_DEPTH_SLOP   (512 * 1024L)
 

Enumerations

enum  LogStmtLevel { LOGSTMT_NONE, LOGSTMT_DDL, LOGSTMT_MOD, LOGSTMT_ALL }
 

Functions

Listpg_parse_query (const char *query_string)
 
Listpg_analyze_and_rewrite (RawStmt *parsetree, const char *query_string, Oid *paramTypes, int numParams)
 
Listpg_analyze_and_rewrite_params (RawStmt *parsetree, const char *query_string, ParserSetupHook parserSetup, void *parserSetupArg)
 
PlannedStmtpg_plan_query (Query *querytree, int cursorOptions, ParamListInfo boundParams)
 
Listpg_plan_queries (List *querytrees, int cursorOptions, ParamListInfo boundParams)
 
bool check_max_stack_depth (int *newval, void **extra, GucSource source)
 
void assign_max_stack_depth (int newval, void *extra)
 
void die (SIGNAL_ARGS)
 
void quickdie (SIGNAL_ARGS) pg_attribute_noreturn()
 
void StatementCancelHandler (SIGNAL_ARGS)
 
void FloatExceptionHandler (SIGNAL_ARGS) pg_attribute_noreturn()
 
void RecoveryConflictInterrupt (ProcSignalReason reason)
 
void ProcessClientReadInterrupt (bool blocked)
 
void ProcessClientWriteInterrupt (bool blocked)
 
void process_postgres_switches (int argc, char *argv[], GucContext ctx, const char **dbname)
 
void PostgresMain (int argc, char *argv[], const char *dbname, const char *username) pg_attribute_noreturn()
 
long get_stack_depth_rlimit (void)
 
void ResetUsage (void)
 
void ShowUsage (const char *title)
 
int check_log_duration (char *msec_str, bool was_logged)
 
void set_debug_options (int debug_flag, GucContext context, GucSource source)
 
bool set_plan_disabling_options (const char *arg, GucContext context, GucSource source)
 
const char * get_stats_option_name (const char *arg)
 

Variables

CommandDest whereToSendOutput
 
PGDLLIMPORT const char * debug_query_string
 
int max_stack_depth
 
int PostAuthDelay
 
int log_statement
 

Macro Definition Documentation

#define STACK_DEPTH_SLOP   (512 * 1024L)

Definition at line 30 of file tcopprot.h.

Referenced by check_max_stack_depth(), and InitializeGUCOptionsFromEnvironment().

Enumeration Type Documentation

Enumerator
LOGSTMT_NONE 
LOGSTMT_DDL 
LOGSTMT_MOD 
LOGSTMT_ALL 

Definition at line 39 of file tcopprot.h.

40 {
41  LOGSTMT_NONE, /* log no statements */
42  LOGSTMT_DDL, /* log data definition statements */
43  LOGSTMT_MOD, /* log modification statements, plus DDL */
44  LOGSTMT_ALL /* log all statements */
45 } LogStmtLevel;
LogStmtLevel
Definition: tcopprot.h:39

Function Documentation

void assign_max_stack_depth ( int  newval,
void *  extra 
)

Definition at line 3176 of file postgres.c.

References max_stack_depth_bytes.

3177 {
3178  long newval_bytes = newval * 1024L;
3179 
3180  max_stack_depth_bytes = newval_bytes;
3181 }
static long max_stack_depth_bytes
Definition: postgres.c:107
#define newval
int check_log_duration ( char *  msec_str,
bool  was_logged 
)

Definition at line 2100 of file postgres.c.

References GetCurrentStatementStartTimestamp(), GetCurrentTimestamp(), log_duration, log_min_duration_statement, snprintf(), and TimestampDifference().

Referenced by exec_bind_message(), exec_execute_message(), exec_parse_message(), exec_simple_query(), and HandleFunctionRequest().

2101 {
2103  {
2104  long secs;
2105  int usecs;
2106  int msecs;
2107  bool exceeded;
2108 
2111  &secs, &usecs);
2112  msecs = usecs / 1000;
2113 
2114  /*
2115  * This odd-looking test for log_min_duration_statement being exceeded
2116  * is designed to avoid integer overflow with very long durations:
2117  * don't compute secs * 1000 until we've verified it will fit in int.
2118  */
2119  exceeded = (log_min_duration_statement == 0 ||
2121  (secs > log_min_duration_statement / 1000 ||
2122  secs * 1000 + msecs >= log_min_duration_statement)));
2123 
2124  if (exceeded || log_duration)
2125  {
2126  snprintf(msec_str, 32, "%ld.%03d",
2127  secs * 1000 + msecs, usecs % 1000);
2128  if (exceeded && !was_logged)
2129  return 2;
2130  else
2131  return 1;
2132  }
2133  }
2134 
2135  return 0;
2136 }
int log_min_duration_statement
Definition: guc.c:455
TimestampTz GetCurrentTimestamp(void)
Definition: timestamp.c:1688
int snprintf(char *str, size_t count, const char *fmt,...) pg_attribute_printf(3
bool log_duration
Definition: guc.c:434
void TimestampDifference(TimestampTz start_time, TimestampTz stop_time, long *secs, int *microsecs)
Definition: timestamp.c:1791
TimestampTz GetCurrentStatementStartTimestamp(void)
Definition: xact.c:716
bool check_max_stack_depth ( int *  newval,
void **  extra,
GucSource  source 
)

Definition at line 3159 of file postgres.c.

References get_stack_depth_rlimit(), GUC_check_errdetail, GUC_check_errhint, and STACK_DEPTH_SLOP.

3160 {
3161  long newval_bytes = *newval * 1024L;
3162  long stack_rlimit = get_stack_depth_rlimit();
3163 
3164  if (stack_rlimit > 0 && newval_bytes > stack_rlimit - STACK_DEPTH_SLOP)
3165  {
3166  GUC_check_errdetail("\"max_stack_depth\" must not exceed %ldkB.",
3167  (stack_rlimit - STACK_DEPTH_SLOP) / 1024L);
3168  GUC_check_errhint("Increase the platform's stack depth limit via \"ulimit -s\" or local equivalent.");
3169  return false;
3170  }
3171  return true;
3172 }
#define GUC_check_errdetail
Definition: guc.h:407
long get_stack_depth_rlimit(void)
Definition: postgres.c:4340
#define newval
#define GUC_check_errhint
Definition: guc.h:411
#define STACK_DEPTH_SLOP
Definition: tcopprot.h:30
void die ( SIGNAL_ARGS  )

Definition at line 2617 of file postgres.c.

References DestRemote, DoingCommandRead, InterruptPending, MyLatch, proc_exit_inprogress, ProcDiePending, ProcessInterrupts(), SetLatch(), and whereToSendOutput.

Referenced by AutoVacWorkerMain(), bootstrap_signals(), ParallelWorkerMain(), PostgresMain(), and WalSndSignals().

2618 {
2619  int save_errno = errno;
2620 
2621  /* Don't joggle the elbow of proc_exit */
2622  if (!proc_exit_inprogress)
2623  {
2624  InterruptPending = true;
2625  ProcDiePending = true;
2626  }
2627 
2628  /* If we're still here, waken anything waiting on the process latch */
2629  SetLatch(MyLatch);
2630 
2631  /*
2632  * If we're in single user mode, we want to quit immediately - we can't
2633  * rely on latches as they wouldn't work when stdin/stdout is a file.
2634  * Rather ugly, but it's unlikely to be worthwhile to invest much more
2635  * effort just for the benefit of single user mode.
2636  */
2639 
2640  errno = save_errno;
2641 }
void ProcessInterrupts(void)
Definition: postgres.c:2819
volatile bool InterruptPending
Definition: globals.c:29
void SetLatch(volatile Latch *latch)
Definition: latch.c:380
bool proc_exit_inprogress
Definition: ipc.c:40
static bool DoingCommandRead
Definition: postgres.c:142
volatile bool ProcDiePending
Definition: globals.c:31
struct Latch * MyLatch
Definition: globals.c:51
CommandDest whereToSendOutput
Definition: postgres.c:86
void FloatExceptionHandler ( SIGNAL_ARGS  )

Definition at line 2669 of file postgres.c.

References ereport, errcode(), errdetail(), errmsg(), and ERROR.

Referenced by AutoVacLauncherMain(), AutoVacWorkerMain(), plperl_init_interp(), PostgresMain(), and StartBackgroundWorker().

2670 {
2671  /* We're not returning, so no need to save errno */
2672  ereport(ERROR,
2673  (errcode(ERRCODE_FLOATING_POINT_EXCEPTION),
2674  errmsg("floating-point exception"),
2675  errdetail("An invalid floating-point operation was signaled. "
2676  "This probably means an out-of-range result or an "
2677  "invalid operation, such as division by zero.")));
2678 }
int errcode(int sqlerrcode)
Definition: elog.c:575
#define ERROR
Definition: elog.h:43
int errdetail(const char *fmt,...)
Definition: elog.c:873
#define ereport(elevel, rest)
Definition: elog.h:122
int errmsg(const char *fmt,...)
Definition: elog.c:797
long get_stack_depth_rlimit ( void  )

Definition at line 4340 of file postgres.c.

References val.

Referenced by check_max_stack_depth(), and InitializeGUCOptionsFromEnvironment().

4341 {
4342 #if defined(HAVE_GETRLIMIT) && defined(RLIMIT_STACK)
4343  static long val = 0;
4344 
4345  /* This won't change after process launch, so check just once */
4346  if (val == 0)
4347  {
4348  struct rlimit rlim;
4349 
4350  if (getrlimit(RLIMIT_STACK, &rlim) < 0)
4351  val = -1;
4352  else if (rlim.rlim_cur == RLIM_INFINITY)
4353  val = LONG_MAX;
4354  /* rlim_cur is probably of an unsigned type, so check for overflow */
4355  else if (rlim.rlim_cur >= LONG_MAX)
4356  val = LONG_MAX;
4357  else
4358  val = rlim.rlim_cur;
4359  }
4360  return val;
4361 #else /* no getrlimit */
4362 #if defined(WIN32) || defined(__CYGWIN__)
4363  /* On Windows we set the backend stack size in src/backend/Makefile */
4364  return WIN32_STACK_RLIMIT;
4365 #else /* not windows ... give up */
4366  return -1;
4367 #endif
4368 #endif
4369 }
long val
Definition: informix.c:689
const char* get_stats_option_name ( const char *  arg)

Definition at line 3262 of file postgres.c.

References NULL, and optarg.

Referenced by PostmasterMain(), and process_postgres_switches().

3263 {
3264  switch (arg[0])
3265  {
3266  case 'p':
3267  if (optarg[1] == 'a') /* "parser" */
3268  return "log_parser_stats";
3269  else if (optarg[1] == 'l') /* "planner" */
3270  return "log_planner_stats";
3271  break;
3272 
3273  case 'e': /* "executor" */
3274  return "log_executor_stats";
3275  break;
3276  }
3277 
3278  return NULL;
3279 }
#define NULL
Definition: c.h:226
char * optarg
Definition: getopt.c:53
void * arg
List* pg_analyze_and_rewrite ( RawStmt parsetree,
const char *  query_string,
Oid paramTypes,
int  numParams 
)

Definition at line 644 of file postgres.c.

References log_parser_stats, parse_analyze(), pg_rewrite_query(), ResetUsage(), and ShowUsage().

Referenced by _SPI_execute_plan(), _SPI_prepare_plan(), BeginCopy(), exec_simple_query(), execute_sql_string(), and RevalidateCachedQuery().

646 {
647  Query *query;
648  List *querytree_list;
649 
650  TRACE_POSTGRESQL_QUERY_REWRITE_START(query_string);
651 
652  /*
653  * (1) Perform parse analysis.
654  */
655  if (log_parser_stats)
656  ResetUsage();
657 
658  query = parse_analyze(parsetree, query_string, paramTypes, numParams);
659 
660  if (log_parser_stats)
661  ShowUsage("PARSE ANALYSIS STATISTICS");
662 
663  /*
664  * (2) Rewrite the queries, as necessary
665  */
666  querytree_list = pg_rewrite_query(query);
667 
668  TRACE_POSTGRESQL_QUERY_REWRITE_DONE(query_string);
669 
670  return querytree_list;
671 }
bool log_parser_stats
Definition: guc.c:440
void ShowUsage(const char *title)
Definition: postgres.c:4383
Query * parse_analyze(RawStmt *parseTree, const char *sourceText, Oid *paramTypes, int numParams)
Definition: analyze.c:96
void ResetUsage(void)
Definition: postgres.c:4376
static List * pg_rewrite_query(Query *query)
Definition: postgres.c:729
Definition: pg_list.h:45
List* pg_analyze_and_rewrite_params ( RawStmt parsetree,
const char *  query_string,
ParserSetupHook  parserSetup,
void *  parserSetupArg 
)

Definition at line 679 of file postgres.c.

References Assert, free_parsestate(), log_parser_stats, make_parsestate(), NULL, ParseState::p_sourcetext, pg_rewrite_query(), post_parse_analyze_hook, ResetUsage(), ShowUsage(), and transformTopLevelStmt().

Referenced by _SPI_execute_plan(), _SPI_prepare_plan(), fmgr_sql_validator(), init_sql_fcache(), inline_set_returning_function(), and RevalidateCachedQuery().

683 {
684  ParseState *pstate;
685  Query *query;
686  List *querytree_list;
687 
688  Assert(query_string != NULL); /* required as of 8.4 */
689 
690  TRACE_POSTGRESQL_QUERY_REWRITE_START(query_string);
691 
692  /*
693  * (1) Perform parse analysis.
694  */
695  if (log_parser_stats)
696  ResetUsage();
697 
698  pstate = make_parsestate(NULL);
699  pstate->p_sourcetext = query_string;
700  (*parserSetup) (pstate, parserSetupArg);
701 
702  query = transformTopLevelStmt(pstate, parsetree);
703 
705  (*post_parse_analyze_hook) (pstate, query);
706 
707  free_parsestate(pstate);
708 
709  if (log_parser_stats)
710  ShowUsage("PARSE ANALYSIS STATISTICS");
711 
712  /*
713  * (2) Rewrite the queries, as necessary
714  */
715  querytree_list = pg_rewrite_query(query);
716 
717  TRACE_POSTGRESQL_QUERY_REWRITE_DONE(query_string);
718 
719  return querytree_list;
720 }
bool log_parser_stats
Definition: guc.c:440
void ShowUsage(const char *title)
Definition: postgres.c:4383
ParseState * make_parsestate(ParseState *parentParseState)
Definition: parse_node.c:44
void ResetUsage(void)
Definition: postgres.c:4376
const char * p_sourcetext
Definition: parse_node.h:167
static List * pg_rewrite_query(Query *query)
Definition: postgres.c:729
#define NULL
Definition: c.h:226
#define Assert(condition)
Definition: c.h:670
Query * transformTopLevelStmt(ParseState *pstate, RawStmt *parseTree)
Definition: analyze.c:184
void free_parsestate(ParseState *pstate)
Definition: parse_node.c:75
Definition: pg_list.h:45
post_parse_analyze_hook_type post_parse_analyze_hook
Definition: analyze.c:49
List* pg_parse_query ( const char *  query_string)

Definition at line 602 of file postgres.c.

References copyObject(), elog, equal(), log_parser_stats, new_list(), raw_parser(), ResetUsage(), ShowUsage(), and WARNING.

Referenced by _SPI_prepare_oneshot_plan(), _SPI_prepare_plan(), exec_parse_message(), exec_simple_query(), execute_sql_string(), fmgr_sql_validator(), ImportForeignSchema(), init_sql_fcache(), inline_function(), and inline_set_returning_function().

603 {
604  List *raw_parsetree_list;
605 
606  TRACE_POSTGRESQL_QUERY_PARSE_START(query_string);
607 
608  if (log_parser_stats)
609  ResetUsage();
610 
611  raw_parsetree_list = raw_parser(query_string);
612 
613  if (log_parser_stats)
614  ShowUsage("PARSER STATISTICS");
615 
616 #ifdef COPY_PARSE_PLAN_TREES
617  /* Optional debugging check: pass raw parsetrees through copyObject() */
618  {
619  List *new_list = (List *) copyObject(raw_parsetree_list);
620 
621  /* This checks both copyObject() and the equal() routines... */
622  if (!equal(new_list, raw_parsetree_list))
623  elog(WARNING, "copyObject() failed to produce an equal raw parse tree");
624  else
625  raw_parsetree_list = new_list;
626  }
627 #endif
628 
629  TRACE_POSTGRESQL_QUERY_PARSE_DONE(query_string);
630 
631  return raw_parsetree_list;
632 }
List * raw_parser(const char *str)
Definition: parser.c:36
bool log_parser_stats
Definition: guc.c:440
bool equal(const void *a, const void *b)
Definition: equalfuncs.c:2870
void ShowUsage(const char *title)
Definition: postgres.c:4383
static List * new_list(NodeTag type)
Definition: list.c:63
void * copyObject(const void *from)
Definition: copyfuncs.c:4475
void ResetUsage(void)
Definition: postgres.c:4376
#define WARNING
Definition: elog.h:40
#define elog
Definition: elog.h:219
Definition: pg_list.h:45
List* pg_plan_queries ( List querytrees,
int  cursorOptions,
ParamListInfo  boundParams 
)

Definition at line 842 of file postgres.c.

References PlannedStmt::canSetTag, Query::canSetTag, castNode, CMD_UTILITY, PlannedStmt::commandType, Query::commandType, lappend(), lfirst, makeNode, NIL, pg_plan_query(), PlannedStmt::stmt_len, Query::stmt_len, PlannedStmt::stmt_location, Query::stmt_location, PlannedStmt::utilityStmt, and Query::utilityStmt.

Referenced by BuildCachedPlan(), exec_simple_query(), and execute_sql_string().

843 {
844  List *stmt_list = NIL;
845  ListCell *query_list;
846 
847  foreach(query_list, querytrees)
848  {
849  Query *query = castNode(Query, lfirst(query_list));
850  PlannedStmt *stmt;
851 
852  if (query->commandType == CMD_UTILITY)
853  {
854  /* Utility commands require no planning. */
855  stmt = makeNode(PlannedStmt);
856  stmt->commandType = CMD_UTILITY;
857  stmt->canSetTag = query->canSetTag;
858  stmt->utilityStmt = query->utilityStmt;
859  stmt->stmt_location = query->stmt_location;
860  stmt->stmt_len = query->stmt_len;
861  }
862  else
863  {
864  stmt = pg_plan_query(query, cursorOptions, boundParams);
865  }
866 
867  stmt_list = lappend(stmt_list, stmt);
868  }
869 
870  return stmt_list;
871 }
#define NIL
Definition: pg_list.h:69
int stmt_location
Definition: parsenodes.h:171
#define castNode(_type_, nodeptr)
Definition: nodes.h:577
Node * utilityStmt
Definition: parsenodes.h:111
int stmt_len
Definition: plannodes.h:84
int stmt_location
Definition: plannodes.h:83
Node * utilityStmt
Definition: plannodes.h:80
List * lappend(List *list, void *datum)
Definition: list.c:128
bool canSetTag
Definition: plannodes.h:53
CmdType commandType
Definition: plannodes.h:45
CmdType commandType
Definition: parsenodes.h:103
#define makeNode(_type_)
Definition: nodes.h:556
#define lfirst(lc)
Definition: pg_list.h:106
bool canSetTag
Definition: parsenodes.h:109
Definition: pg_list.h:45
int stmt_len
Definition: parsenodes.h:172
PlannedStmt * pg_plan_query(Query *querytree, int cursorOptions, ParamListInfo boundParams)
Definition: postgres.c:781
PlannedStmt* pg_plan_query ( Query querytree,
int  cursorOptions,
ParamListInfo  boundParams 
)

Definition at line 781 of file postgres.c.

References ActiveSnapshotSet(), Assert, CMD_UTILITY, Query::commandType, copyObject(), Debug_pretty_print, Debug_print_plan, elog, elog_node_display(), equal(), LOG, log_planner_stats, NULL, planner(), ResetUsage(), ShowUsage(), and WARNING.

Referenced by BeginCopy(), ExecCreateTableAs(), ExplainOneQuery(), init_execution_state(), PerformCursorOpen(), pg_plan_queries(), and refresh_matview_datafill().

782 {
783  PlannedStmt *plan;
784 
785  /* Utility commands have no plans. */
786  if (querytree->commandType == CMD_UTILITY)
787  return NULL;
788 
789  /* Planner must have a snapshot in case it calls user-defined functions. */
791 
792  TRACE_POSTGRESQL_QUERY_PLAN_START();
793 
794  if (log_planner_stats)
795  ResetUsage();
796 
797  /* call the optimizer */
798  plan = planner(querytree, cursorOptions, boundParams);
799 
800  if (log_planner_stats)
801  ShowUsage("PLANNER STATISTICS");
802 
803 #ifdef COPY_PARSE_PLAN_TREES
804  /* Optional debugging check: pass plan output through copyObject() */
805  {
806  PlannedStmt *new_plan = (PlannedStmt *) copyObject(plan);
807 
808  /*
809  * equal() currently does not have routines to compare Plan nodes, so
810  * don't try to test equality here. Perhaps fix someday?
811  */
812 #ifdef NOT_USED
813  /* This checks both copyObject() and the equal() routines... */
814  if (!equal(new_plan, plan))
815  elog(WARNING, "copyObject() failed to produce an equal plan tree");
816  else
817 #endif
818  plan = new_plan;
819  }
820 #endif
821 
822  /*
823  * Print plan if debugging.
824  */
825  if (Debug_print_plan)
826  elog_node_display(LOG, "plan", plan, Debug_pretty_print);
827 
828  TRACE_POSTGRESQL_QUERY_PLAN_DONE();
829 
830  return plan;
831 }
void elog_node_display(int lev, const char *title, const void *obj, bool pretty)
Definition: print.c:71
bool equal(const void *a, const void *b)
Definition: equalfuncs.c:2870
void ShowUsage(const char *title)
Definition: postgres.c:4383
#define LOG
Definition: elog.h:26
PlannedStmt * planner(Query *parse, int cursorOptions, ParamListInfo boundParams)
Definition: planner.c:174
void * copyObject(const void *from)
Definition: copyfuncs.c:4475
void ResetUsage(void)
Definition: postgres.c:4376
bool Debug_print_plan
Definition: guc.c:435
bool ActiveSnapshotSet(void)
Definition: snapmgr.c:846
#define WARNING
Definition: elog.h:40
CmdType commandType
Definition: parsenodes.h:103
#define NULL
Definition: c.h:226
#define Assert(condition)
Definition: c.h:670
bool Debug_pretty_print
Definition: guc.c:438
#define elog
Definition: elog.h:219
bool log_planner_stats
Definition: guc.c:441
void PostgresMain ( int  argc,
char *  argv[],
const char *  dbname,
const char *  username 
)

Definition at line 3561 of file postgres.c.

References AbortCurrentTransaction(), ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate(), am_walsender, Assert, BaseInit(), BeginReportingGUCOptions(), BlockSig, buf, ChangeToDataDir(), CHECK_FOR_INTERRUPTS, CreateDataDirLockFile(), DataDir, debug_query_string, DestDebug, DestNone, DestRemote, die(), disable_all_timeouts(), disable_timeout(), doing_extended_query_message, DoingCommandRead, drop_unnamed_stmt(), DropPreparedStatement(), EmitErrorReport(), enable_timeout_after(), ereport, errcode(), errmsg(), ERROR, error_context_stack, exec_bind_message(), exec_describe_portal_message(), exec_describe_statement_message(), exec_execute_message(), exec_parse_message(), exec_replication_command(), exec_simple_query(), FATAL, finish_xact_command(), FloatExceptionHandler(), FlushErrorState(), forbidden_in_wal_sender(), GetCurrentTimestamp(), GetPortalByName(), got_SIGHUP, HandleFunctionRequest(), HOLD_INTERRUPTS, i, IDLE_IN_TRANSACTION_SESSION_TIMEOUT, IdleInTransactionSessionTimeout, ignore_till_sync, InitializeGUCOptions(), InitializeMaxBackends(), InitializeTimeouts(), InitPostgres(), InitProcess(), InitProcessing, InitStandaloneProcess(), initStringInfo(), InitWalSender(), InvalidateCatalogSnapshotConditionally(), InvalidOid, IsAbortedTransactionBlockState(), IsTransactionOrTransactionBlock(), IsUnderPostmaster, Log_disconnections, log_disconnections(), MemoryContextDelete(), MemoryContextResetAndDeleteChildren, MemoryContextSwitchTo(), MessageContext, MyCancelKey, MyProcPid, MyReplicationSlot, NormalProcessing, NULL, on_proc_exit(), palloc(), PG_exception_stack, PG_SETMASK, PGC_POSTMASTER, PGC_SIGHUP, PgStartTime, pgstat_report_activity(), pgstat_report_stat(), PortalDrop(), PortalIsValid, PostmasterContext, pq_beginmessage(), pq_comm_reset, pq_endmessage(), pq_flush, pq_getmsgbyte(), pq_getmsgend(), pq_getmsgint(), pq_getmsgstring(), pq_is_reading_msg(), pq_putemptymessage(), pq_sendint(), pqinitmask(), pqsignal(), proc_exit(), process_postgres_switches(), process_session_preload_libraries(), ProcessCompletedNotifies(), ProcessConfigFile(), procsignal_sigusr1_handler(), progname, QueryCancelPending, quickdie(), ReadCommand(), ReadyForQuery(), ReplicationSlotCleanup(), ReplicationSlotRelease(), RESUME_INTERRUPTS, SelectConfigFiles(), set_ps_display(), SetCurrentStatementStartTimestamp(), SetProcessingMode, SIG_DFL, SIG_IGN, SIGCHLD, SIGHUP, SigHupHandler(), SIGPIPE, SIGQUIT, SIGUSR1, SIGUSR2, start_xact_command(), STATE_FASTPATH, STATE_IDLE, STATE_IDLEINTRANSACTION, STATE_IDLEINTRANSACTION_ABORTED, StatementCancelHandler(), TopMemoryContext, UnBlockSig, userDoption, username, ValidatePgVersion(), WalSndErrorCleanup(), WalSndSignals(), whereToSendOutput, and xact_started.

Referenced by BackendRun(), and main().

3564 {
3565  int firstchar;
3566  StringInfoData input_message;
3567  sigjmp_buf local_sigjmp_buf;
3568  volatile bool send_ready_for_query = true;
3569  bool disable_idle_in_transaction_timeout = false;
3570 
3571  /* Initialize startup process environment if necessary. */
3572  if (!IsUnderPostmaster)
3573  InitStandaloneProcess(argv[0]);
3574 
3576 
3577  /*
3578  * Set default values for command-line options.
3579  */
3580  if (!IsUnderPostmaster)
3582 
3583  /*
3584  * Parse command-line options.
3585  */
3587 
3588  /* Must have gotten a database name, or have a default (the username) */
3589  if (dbname == NULL)
3590  {
3591  dbname = username;
3592  if (dbname == NULL)
3593  ereport(FATAL,
3594  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
3595  errmsg("%s: no database nor user name specified",
3596  progname)));
3597  }
3598 
3599  /* Acquire configuration parameters, unless inherited from postmaster */
3600  if (!IsUnderPostmaster)
3601  {
3603  proc_exit(1);
3604  }
3605 
3606  /*
3607  * Set up signal handlers and masks.
3608  *
3609  * Note that postmaster blocked all signals before forking child process,
3610  * so there is no race condition whereby we might receive a signal before
3611  * we have set up the handler.
3612  *
3613  * Also note: it's best not to use any signals that are SIG_IGNored in the
3614  * postmaster. If such a signal arrives before we are able to change the
3615  * handler to non-SIG_IGN, it'll get dropped. Instead, make a dummy
3616  * handler in the postmaster to reserve the signal. (Of course, this isn't
3617  * an issue for signals that are locally generated, such as SIGALRM and
3618  * SIGPIPE.)
3619  */
3620  if (am_walsender)
3621  WalSndSignals();
3622  else
3623  {
3624  pqsignal(SIGHUP, SigHupHandler); /* set flag to read config
3625  * file */
3626  pqsignal(SIGINT, StatementCancelHandler); /* cancel current query */
3627  pqsignal(SIGTERM, die); /* cancel current query and exit */
3628 
3629  /*
3630  * In a standalone backend, SIGQUIT can be generated from the keyboard
3631  * easily, while SIGTERM cannot, so we make both signals do die()
3632  * rather than quickdie().
3633  */
3634  if (IsUnderPostmaster)
3635  pqsignal(SIGQUIT, quickdie); /* hard crash time */
3636  else
3637  pqsignal(SIGQUIT, die); /* cancel current query and exit */
3638  InitializeTimeouts(); /* establishes SIGALRM handler */
3639 
3640  /*
3641  * Ignore failure to write to frontend. Note: if frontend closes
3642  * connection, we will notice it and exit cleanly when control next
3643  * returns to outer loop. This seems safer than forcing exit in the
3644  * midst of output during who-knows-what operation...
3645  */
3650 
3651  /*
3652  * Reset some signals that are accepted by postmaster but not by
3653  * backend
3654  */
3655  pqsignal(SIGCHLD, SIG_DFL); /* system() requires this on some
3656  * platforms */
3657  }
3658 
3659  pqinitmask();
3660 
3661  if (IsUnderPostmaster)
3662  {
3663  /* We allow SIGQUIT (quickdie) at all times */
3664  sigdelset(&BlockSig, SIGQUIT);
3665  }
3666 
3667  PG_SETMASK(&BlockSig); /* block everything except SIGQUIT */
3668 
3669  if (!IsUnderPostmaster)
3670  {
3671  /*
3672  * Validate we have been given a reasonable-looking DataDir (if under
3673  * postmaster, assume postmaster did this already).
3674  */
3675  Assert(DataDir);
3677 
3678  /* Change into DataDir (if under postmaster, was done already) */
3679  ChangeToDataDir();
3680 
3681  /*
3682  * Create lockfile for data directory.
3683  */
3684  CreateDataDirLockFile(false);
3685 
3686  /* Initialize MaxBackends (if under postmaster, was done already) */
3688  }
3689 
3690  /* Early initialization */
3691  BaseInit();
3692 
3693  /*
3694  * Create a per-backend PGPROC struct in shared memory, except in the
3695  * EXEC_BACKEND case where this was done in SubPostmasterMain. We must do
3696  * this before we can use LWLocks (and in the EXEC_BACKEND case we already
3697  * had to do some stuff with LWLocks).
3698  */
3699 #ifdef EXEC_BACKEND
3700  if (!IsUnderPostmaster)
3701  InitProcess();
3702 #else
3703  InitProcess();
3704 #endif
3705 
3706  /* We need to allow SIGINT, etc during the initial transaction */
3708 
3709  /*
3710  * General initialization.
3711  *
3712  * NOTE: if you are tempted to add code in this vicinity, consider putting
3713  * it inside InitPostgres() instead. In particular, anything that
3714  * involves database access should be there, not here.
3715  */
3717 
3718  /*
3719  * If the PostmasterContext is still around, recycle the space; we don't
3720  * need it anymore after InitPostgres completes. Note this does not trash
3721  * *MyProcPort, because ConnCreate() allocated that space with malloc()
3722  * ... else we'd need to copy the Port data first. Also, subsidiary data
3723  * such as the username isn't lost either; see ProcessStartupPacket().
3724  */
3725  if (PostmasterContext)
3726  {
3729  }
3730 
3732 
3733  /*
3734  * Now all GUC states are fully set up. Report them to client if
3735  * appropriate.
3736  */
3738 
3739  /*
3740  * Also set up handler to log session end; we have to wait till now to be
3741  * sure Log_disconnections has its final value.
3742  */
3745 
3746  /* Perform initialization specific to a WAL sender process. */
3747  if (am_walsender)
3748  InitWalSender();
3749 
3750  /*
3751  * process any libraries that should be preloaded at backend start (this
3752  * likewise can't be done until GUC settings are complete)
3753  */
3755 
3756  /*
3757  * Send this backend's cancellation info to the frontend.
3758  */
3760  {
3762 
3763  pq_beginmessage(&buf, 'K');
3764  pq_sendint(&buf, (int32) MyProcPid, sizeof(int32));
3765  pq_sendint(&buf, (int32) MyCancelKey, sizeof(int32));
3766  pq_endmessage(&buf);
3767  /* Need not flush since ReadyForQuery will do it. */
3768  }
3769 
3770  /* Welcome banner for standalone case */
3772  printf("\nPostgreSQL stand-alone backend %s\n", PG_VERSION);
3773 
3774  /*
3775  * Create the memory context we will use in the main loop.
3776  *
3777  * MessageContext is reset once per iteration of the main loop, ie, upon
3778  * completion of processing of each command message from the client.
3779  */
3781  "MessageContext",
3783 
3784  /*
3785  * Remember stand-alone backend startup time
3786  */
3787  if (!IsUnderPostmaster)
3789 
3790  /*
3791  * POSTGRES main processing loop begins here
3792  *
3793  * If an exception is encountered, processing resumes here so we abort the
3794  * current transaction and start a new one.
3795  *
3796  * You might wonder why this isn't coded as an infinite loop around a
3797  * PG_TRY construct. The reason is that this is the bottom of the
3798  * exception stack, and so with PG_TRY there would be no exception handler
3799  * in force at all during the CATCH part. By leaving the outermost setjmp
3800  * always active, we have at least some chance of recovering from an error
3801  * during error recovery. (If we get into an infinite loop thereby, it
3802  * will soon be stopped by overflow of elog.c's internal state stack.)
3803  *
3804  * Note that we use sigsetjmp(..., 1), so that this function's signal mask
3805  * (to wit, UnBlockSig) will be restored when longjmp'ing to here. This
3806  * is essential in case we longjmp'd out of a signal handler on a platform
3807  * where that leaves the signal blocked. It's not redundant with the
3808  * unblock in AbortTransaction() because the latter is only called if we
3809  * were inside a transaction.
3810  */
3811 
3812  if (sigsetjmp(local_sigjmp_buf, 1) != 0)
3813  {
3814  /*
3815  * NOTE: if you are tempted to add more code in this if-block,
3816  * consider the high probability that it should be in
3817  * AbortTransaction() instead. The only stuff done directly here
3818  * should be stuff that is guaranteed to apply *only* for outer-level
3819  * error recovery, such as adjusting the FE/BE protocol status.
3820  */
3821 
3822  /* Since not using PG_TRY, must reset error stack by hand */
3824 
3825  /* Prevent interrupts while cleaning up */
3826  HOLD_INTERRUPTS();
3827 
3828  /*
3829  * Forget any pending QueryCancel request, since we're returning to
3830  * the idle loop anyway, and cancel any active timeout requests. (In
3831  * future we might want to allow some timeout requests to survive, but
3832  * at minimum it'd be necessary to do reschedule_timeouts(), in case
3833  * we got here because of a query cancel interrupting the SIGALRM
3834  * interrupt handler.) Note in particular that we must clear the
3835  * statement and lock timeout indicators, to prevent any future plain
3836  * query cancels from being misreported as timeouts in case we're
3837  * forgetting a timeout cancel.
3838  */
3839  disable_all_timeouts(false);
3840  QueryCancelPending = false; /* second to avoid race condition */
3841 
3842  /* Not reading from the client anymore. */
3843  DoingCommandRead = false;
3844 
3845  /* Make sure libpq is in a good state */
3846  pq_comm_reset();
3847 
3848  /* Report the error to the client and/or server log */
3849  EmitErrorReport();
3850 
3851  /*
3852  * Make sure debug_query_string gets reset before we possibly clobber
3853  * the storage it points at.
3854  */
3856 
3857  /*
3858  * Abort the current transaction in order to recover.
3859  */
3861 
3862  if (am_walsender)
3864 
3865  /*
3866  * We can't release replication slots inside AbortTransaction() as we
3867  * need to be able to start and abort transactions while having a slot
3868  * acquired. But we never need to hold them across top level errors,
3869  * so releasing here is fine. There's another cleanup in ProcKill()
3870  * ensuring we'll correctly cleanup on FATAL errors as well.
3871  */
3872  if (MyReplicationSlot != NULL)
3874 
3875  /* We also want to cleanup temporary slots on error. */
3877 
3878  /*
3879  * Now return to normal top-level context and clear ErrorContext for
3880  * next time.
3881  */
3883  FlushErrorState();
3884 
3885  /*
3886  * If we were handling an extended-query-protocol message, initiate
3887  * skip till next Sync. This also causes us not to issue
3888  * ReadyForQuery (until we get Sync).
3889  */
3891  ignore_till_sync = true;
3892 
3893  /* We don't have a transaction command open anymore */
3894  xact_started = false;
3895 
3896  /*
3897  * If an error occurred while we were reading a message from the
3898  * client, we have potentially lost track of where the previous
3899  * message ends and the next one begins. Even though we have
3900  * otherwise recovered from the error, we cannot safely read any more
3901  * messages from the client, so there isn't much we can do with the
3902  * connection anymore.
3903  */
3904  if (pq_is_reading_msg())
3905  ereport(FATAL,
3906  (errcode(ERRCODE_PROTOCOL_VIOLATION),
3907  errmsg("terminating connection because protocol synchronization was lost")));
3908 
3909  /* Now we can allow interrupts again */
3911  }
3912 
3913  /* We can now handle ereport(ERROR) */
3914  PG_exception_stack = &local_sigjmp_buf;
3915 
3916  if (!ignore_till_sync)
3917  send_ready_for_query = true; /* initially, or after error */
3918 
3919  /*
3920  * Non-error queries loop here.
3921  */
3922 
3923  for (;;)
3924  {
3925  /*
3926  * At top of loop, reset extended-query-message flag, so that any
3927  * errors encountered in "idle" state don't provoke skip.
3928  */
3930 
3931  /*
3932  * Release storage left over from prior query cycle, and create a new
3933  * query input buffer in the cleared MessageContext.
3934  */
3937 
3938  initStringInfo(&input_message);
3939 
3940  /*
3941  * Also consider releasing our catalog snapshot if any, so that it's
3942  * not preventing advance of global xmin while we wait for the client.
3943  */
3945 
3946  /*
3947  * (1) If we've reached idle state, tell the frontend we're ready for
3948  * a new query.
3949  *
3950  * Note: this includes fflush()'ing the last of the prior output.
3951  *
3952  * This is also a good time to send collected statistics to the
3953  * collector, and to update the PS stats display. We avoid doing
3954  * those every time through the message loop because it'd slow down
3955  * processing of batched messages, and because we don't want to report
3956  * uncommitted updates (that confuses autovacuum). The notification
3957  * processor wants a call too, if we are not in a transaction block.
3958  */
3959  if (send_ready_for_query)
3960  {
3962  {
3963  set_ps_display("idle in transaction (aborted)", false);
3965 
3966  /* Start the idle-in-transaction timer */
3968  {
3969  disable_idle_in_transaction_timeout = true;
3972  }
3973  }
3975  {
3976  set_ps_display("idle in transaction", false);
3978 
3979  /* Start the idle-in-transaction timer */
3981  {
3982  disable_idle_in_transaction_timeout = true;
3985  }
3986  }
3987  else
3988  {
3990  pgstat_report_stat(false);
3991 
3992  set_ps_display("idle", false);
3994  }
3995 
3997  send_ready_for_query = false;
3998  }
3999 
4000  /*
4001  * (2) Allow asynchronous signals to be executed immediately if they
4002  * come in while we are waiting for client input. (This must be
4003  * conditional since we don't want, say, reads on behalf of COPY FROM
4004  * STDIN doing the same thing.)
4005  */
4006  DoingCommandRead = true;
4007 
4008  /*
4009  * (3) read a command (loop blocks here)
4010  */
4011  firstchar = ReadCommand(&input_message);
4012 
4013  /*
4014  * (4) disable async signal conditions again.
4015  *
4016  * Query cancel is supposed to be a no-op when there is no query in
4017  * progress, so if a query cancel arrived while we were idle, just
4018  * reset QueryCancelPending. ProcessInterrupts() has that effect when
4019  * it's called when DoingCommandRead is set, so check for interrupts
4020  * before resetting DoingCommandRead.
4021  */
4023  DoingCommandRead = false;
4024 
4025  /*
4026  * (5) turn off the idle-in-transaction timeout
4027  */
4028  if (disable_idle_in_transaction_timeout)
4029  {
4031  disable_idle_in_transaction_timeout = false;
4032  }
4033 
4034  /*
4035  * (6) check for any other interesting events that happened while we
4036  * slept.
4037  */
4038  if (got_SIGHUP)
4039  {
4040  got_SIGHUP = false;
4042  }
4043 
4044  /*
4045  * (7) process the command. But ignore it if we're skipping till
4046  * Sync.
4047  */
4048  if (ignore_till_sync && firstchar != EOF)
4049  continue;
4050 
4051  switch (firstchar)
4052  {
4053  case 'Q': /* simple query */
4054  {
4055  const char *query_string;
4056 
4057  /* Set statement_timestamp() */
4059 
4060  query_string = pq_getmsgstring(&input_message);
4061  pq_getmsgend(&input_message);
4062 
4063  if (am_walsender)
4064  exec_replication_command(query_string);
4065  else
4066  exec_simple_query(query_string);
4067 
4068  send_ready_for_query = true;
4069  }
4070  break;
4071 
4072  case 'P': /* parse */
4073  {
4074  const char *stmt_name;
4075  const char *query_string;
4076  int numParams;
4077  Oid *paramTypes = NULL;
4078 
4079  forbidden_in_wal_sender(firstchar);
4080 
4081  /* Set statement_timestamp() */
4083 
4084  stmt_name = pq_getmsgstring(&input_message);
4085  query_string = pq_getmsgstring(&input_message);
4086  numParams = pq_getmsgint(&input_message, 2);
4087  if (numParams > 0)
4088  {
4089  int i;
4090 
4091  paramTypes = (Oid *) palloc(numParams * sizeof(Oid));
4092  for (i = 0; i < numParams; i++)
4093  paramTypes[i] = pq_getmsgint(&input_message, 4);
4094  }
4095  pq_getmsgend(&input_message);
4096 
4097  exec_parse_message(query_string, stmt_name,
4098  paramTypes, numParams);
4099  }
4100  break;
4101 
4102  case 'B': /* bind */
4103  forbidden_in_wal_sender(firstchar);
4104 
4105  /* Set statement_timestamp() */
4107 
4108  /*
4109  * this message is complex enough that it seems best to put
4110  * the field extraction out-of-line
4111  */
4112  exec_bind_message(&input_message);
4113  break;
4114 
4115  case 'E': /* execute */
4116  {
4117  const char *portal_name;
4118  int max_rows;
4119 
4120  forbidden_in_wal_sender(firstchar);
4121 
4122  /* Set statement_timestamp() */
4124 
4125  portal_name = pq_getmsgstring(&input_message);
4126  max_rows = pq_getmsgint(&input_message, 4);
4127  pq_getmsgend(&input_message);
4128 
4129  exec_execute_message(portal_name, max_rows);
4130  }
4131  break;
4132 
4133  case 'F': /* fastpath function call */
4134  forbidden_in_wal_sender(firstchar);
4135 
4136  /* Set statement_timestamp() */
4138 
4139  /* Report query to various monitoring facilities. */
4141  set_ps_display("<FASTPATH>", false);
4142 
4143  /* start an xact for this function invocation */
4145 
4146  /*
4147  * Note: we may at this point be inside an aborted
4148  * transaction. We can't throw error for that until we've
4149  * finished reading the function-call message, so
4150  * HandleFunctionRequest() must check for it after doing so.
4151  * Be careful not to do anything that assumes we're inside a
4152  * valid transaction here.
4153  */
4154 
4155  /* switch back to message context */
4157 
4158  if (HandleFunctionRequest(&input_message) == EOF)
4159  {
4160  /* lost frontend connection during F message input */
4161 
4162  /*
4163  * Reset whereToSendOutput to prevent ereport from
4164  * attempting to send any more messages to client.
4165  */
4168 
4169  proc_exit(0);
4170  }
4171 
4172  /* commit the function-invocation transaction */
4174 
4175  send_ready_for_query = true;
4176  break;
4177 
4178  case 'C': /* close */
4179  {
4180  int close_type;
4181  const char *close_target;
4182 
4183  forbidden_in_wal_sender(firstchar);
4184 
4185  close_type = pq_getmsgbyte(&input_message);
4186  close_target = pq_getmsgstring(&input_message);
4187  pq_getmsgend(&input_message);
4188 
4189  switch (close_type)
4190  {
4191  case 'S':
4192  if (close_target[0] != '\0')
4193  DropPreparedStatement(close_target, false);
4194  else
4195  {
4196  /* special-case the unnamed statement */
4198  }
4199  break;
4200  case 'P':
4201  {
4202  Portal portal;
4203 
4204  portal = GetPortalByName(close_target);
4205  if (PortalIsValid(portal))
4206  PortalDrop(portal, false);
4207  }
4208  break;
4209  default:
4210  ereport(ERROR,
4211  (errcode(ERRCODE_PROTOCOL_VIOLATION),
4212  errmsg("invalid CLOSE message subtype %d",
4213  close_type)));
4214  break;
4215  }
4216 
4218  pq_putemptymessage('3'); /* CloseComplete */
4219  }
4220  break;
4221 
4222  case 'D': /* describe */
4223  {
4224  int describe_type;
4225  const char *describe_target;
4226 
4227  forbidden_in_wal_sender(firstchar);
4228 
4229  /* Set statement_timestamp() (needed for xact) */
4231 
4232  describe_type = pq_getmsgbyte(&input_message);
4233  describe_target = pq_getmsgstring(&input_message);
4234  pq_getmsgend(&input_message);
4235 
4236  switch (describe_type)
4237  {
4238  case 'S':
4239  exec_describe_statement_message(describe_target);
4240  break;
4241  case 'P':
4242  exec_describe_portal_message(describe_target);
4243  break;
4244  default:
4245  ereport(ERROR,
4246  (errcode(ERRCODE_PROTOCOL_VIOLATION),
4247  errmsg("invalid DESCRIBE message subtype %d",
4248  describe_type)));
4249  break;
4250  }
4251  }
4252  break;
4253 
4254  case 'H': /* flush */
4255  pq_getmsgend(&input_message);
4257  pq_flush();
4258  break;
4259 
4260  case 'S': /* sync */
4261  pq_getmsgend(&input_message);
4263  send_ready_for_query = true;
4264  break;
4265 
4266  /*
4267  * 'X' means that the frontend is closing down the socket. EOF
4268  * means unexpected loss of frontend connection. Either way,
4269  * perform normal shutdown.
4270  */
4271  case 'X':
4272  case EOF:
4273 
4274  /*
4275  * Reset whereToSendOutput to prevent ereport from attempting
4276  * to send any more messages to client.
4277  */
4280 
4281  /*
4282  * NOTE: if you are tempted to add more code here, DON'T!
4283  * Whatever you had in mind to do should be set up as an
4284  * on_proc_exit or on_shmem_exit callback, instead. Otherwise
4285  * it will fail to be called during other backend-shutdown
4286  * scenarios.
4287  */
4288  proc_exit(0);
4289 
4290  case 'd': /* copy data */
4291  case 'c': /* copy done */
4292  case 'f': /* copy fail */
4293 
4294  /*
4295  * Accept but ignore these messages, per protocol spec; we
4296  * probably got here because a COPY failed, and the frontend
4297  * is still sending data.
4298  */
4299  break;
4300 
4301  default:
4302  ereport(FATAL,
4303  (errcode(ERRCODE_PROTOCOL_VIOLATION),
4304  errmsg("invalid frontend message type %d",
4305  firstchar)));
4306  }
4307  } /* end of input-reading loop */
4308 }
void InitializeTimeouts(void)
Definition: timeout.c:340
void AbortCurrentTransaction(void)
Definition: xact.c:2984
static void exec_describe_portal_message(const char *portal_name)
Definition: postgres.c:2383
#define SIGUSR1
Definition: win32.h:211
void MemoryContextDelete(MemoryContext context)
Definition: mcxt.c:200
void BeginReportingGUCOptions(void)
Definition: guc.c:5321
int MyProcPid
Definition: globals.c:38
#define pq_flush()
Definition: libpq.h:40
static int ReadCommand(StringInfo inBuf)
Definition: postgres.c:502
static void finish_xact_command(void)
Definition: postgres.c:2452
void ProcessConfigFile(GucContext context)
static volatile sig_atomic_t got_SIGHUP
Definition: postgres.c:129
TimestampTz GetCurrentTimestamp(void)
Definition: timestamp.c:1688
void on_proc_exit(pg_on_exit_callback function, Datum arg)
Definition: ipc.c:292
void pgstat_report_activity(BackendState state, const char *cmd_str)
Definition: pgstat.c:2805
const char * pq_getmsgstring(StringInfo msg)
Definition: pqformat.c:621
Portal GetPortalByName(const char *name)
Definition: portalmem.c:129
void InitStandaloneProcess(const char *argv0)
Definition: miscinit.c:219
void ValidatePgVersion(const char *path)
Definition: miscinit.c:1333
bool IsAbortedTransactionBlockState(void)
Definition: xact.c:369
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
void set_ps_display(const char *activity, bool force)
Definition: ps_status.c:326
static void forbidden_in_wal_sender(char firstchar)
Definition: postgres.c:4318
void proc_exit(int code)
Definition: ipc.c:99
int errcode(int sqlerrcode)
Definition: elog.c:575
bool IsTransactionOrTransactionBlock(void)
Definition: xact.c:4320
void pq_putemptymessage(char msgtype)
Definition: pqformat.c:421
#define SetProcessingMode(mode)
Definition: miscadmin.h:371
void ReplicationSlotCleanup()
Definition: slot.c:412
void BaseInit(void)
Definition: postinit.c:517
unsigned int Oid
Definition: postgres_ext.h:31
volatile bool QueryCancelPending
Definition: globals.c:30
const char * progname
Definition: pg_standby.c:37
#define SIGQUIT
Definition: win32.h:197
void FlushErrorState(void)
Definition: elog.c:1587
#define PG_SETMASK(mask)
Definition: pqsignal.h:19
void pq_beginmessage(StringInfo buf, char msgtype)
Definition: pqformat.c:88
void StatementCancelHandler(SIGNAL_ARGS)
Definition: postgres.c:2648
signed int int32
Definition: c.h:253
static void exec_execute_message(const char *portal_name, long max_rows)
Definition: postgres.c:1841
static void log_disconnections(int code, Datum arg)
Definition: postgres.c:4478
#define RESUME_INTERRUPTS()
Definition: miscadmin.h:116
ErrorContextCallback * error_context_stack
Definition: elog.c:88
void pqinitmask(void)
Definition: pqsignal.c:41
bool am_walsender
Definition: walsender.c:106
#define SIG_IGN
Definition: win32.h:193
void disable_all_timeouts(bool keep_indicators)
Definition: timeout.c:596
#define ERROR
Definition: elog.h:43
void CreateDataDirLockFile(bool amPostmaster)
Definition: miscinit.c:1073
bool pq_is_reading_msg(void)
Definition: pqcomm.c:1197
int IdleInTransactionSessionTimeout
Definition: proc.c:63
int32 MyCancelKey
Definition: globals.c:41
void WalSndSignals(void)
Definition: walsender.c:2564
#define FATAL
Definition: elog.h:52
static void SigHupHandler(SIGNAL_ARGS)
Definition: postgres.c:2682
#define ALLOCSET_DEFAULT_SIZES
Definition: memutils.h:145
void InitProcess(void)
Definition: proc.c:287
Definition: dest.h:88
static char * buf
Definition: pg_test_fsync.c:65
bool IsUnderPostmaster
Definition: globals.c:100
static void exec_bind_message(StringInfo input_message)
Definition: postgres.c:1458
Definition: dest.h:89
void ChangeToDataDir(void)
Definition: miscinit.c:115
void ReplicationSlotRelease(void)
Definition: slot.c:374
sigset_t UnBlockSig
Definition: pqsignal.c:22
static bool xact_started
Definition: postgres.c:135
void InitWalSender(void)
#define ereport(elevel, rest)
Definition: elog.h:122
void exec_replication_command(const char *cmd_string)
Definition: walsender.c:1223
MemoryContext TopMemoryContext
Definition: mcxt.c:43
Definition: guc.h:72
void initStringInfo(StringInfo str)
Definition: stringinfo.c:65
const char * debug_query_string
Definition: postgres.c:83
#define MemoryContextResetAndDeleteChildren(ctx)
Definition: memutils.h:88
static void exec_parse_message(const char *query_string, const char *stmt_name, Oid *paramTypes, int numParams)
Definition: postgres.c:1196
#define PortalIsValid(p)
Definition: portal.h:197
static void start_xact_command(void)
Definition: postgres.c:2434
static bool doing_extended_query_message
Definition: postgres.c:148
sigset_t BlockSig
Definition: pqsignal.c:22
void process_session_preload_libraries(void)
Definition: miscinit.c:1478
void WalSndErrorCleanup(void)
Definition: walsender.c:257
MemoryContext AllocSetContextCreate(MemoryContext parent, const char *name, Size minContextSize, Size initBlockSize, Size maxBlockSize)
Definition: aset.c:440
bool SelectConfigFiles(const char *userDoption, const char *progname)
Definition: guc.c:4650
void EmitErrorReport(void)
Definition: elog.c:1446
TimestampTz PgStartTime
Definition: timestamp.c:48
#define SIGPIPE
Definition: win32.h:201
#define SIGHUP
Definition: win32.h:196
static char * username
Definition: initdb.c:130
#define InvalidOid
Definition: postgres_ext.h:36
#define SIG_DFL
Definition: win32.h:191
pqsigfunc pqsignal(int signum, pqsigfunc handler)
Definition: signal.c:168
int pq_getmsgbyte(StringInfo msg)
Definition: pqformat.c:432
void enable_timeout_after(TimeoutId id, int delay_ms)
Definition: timeout.c:428
ReplicationSlot * MyReplicationSlot
Definition: slot.c:95
#define pq_comm_reset()
Definition: libpq.h:39
#define NULL
Definition: c.h:226
#define Assert(condition)
Definition: c.h:670
void ProcessCompletedNotifies(void)
Definition: async.c:1096
void InvalidateCatalogSnapshotConditionally(void)
Definition: snapmgr.c:527
static bool DoingCommandRead
Definition: postgres.c:142
void InitializeMaxBackends(void)
Definition: postinit.c:495
char * dbname
Definition: streamutil.c:41
MemoryContext MessageContext
Definition: mcxt.c:47
sigjmp_buf * PG_exception_stack
Definition: elog.c:90
static const char * userDoption
Definition: postgres.c:159
void SetCurrentStatementStartTimestamp(void)
Definition: xact.c:739
void InitPostgres(const char *in_dbname, Oid dboid, const char *username, Oid useroid, char *out_dbname)
Definition: postinit.c:558
void * palloc(Size size)
Definition: mcxt.c:891
int errmsg(const char *fmt,...)
Definition: elog.c:797
void PortalDrop(Portal portal, bool isTopCommit)
Definition: portalmem.c:461
void pq_sendint(StringInfo buf, int i, int b)
Definition: pqformat.c:236
void ReadyForQuery(CommandDest dest)
Definition: dest.c:241
void pq_endmessage(StringInfo buf)
Definition: pqformat.c:344
void die(SIGNAL_ARGS)
Definition: postgres.c:2617
#define HOLD_INTERRUPTS()
Definition: miscadmin.h:114
int i
void FloatExceptionHandler(SIGNAL_ARGS)
Definition: postgres.c:2669
static void drop_unnamed_stmt(void)
Definition: postgres.c:2531
char * DataDir
Definition: globals.c:59
unsigned int pq_getmsgint(StringInfo msg, int b)
Definition: pqformat.c:448
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:97
bool Log_disconnections
Definition: postgres.c:89
void process_postgres_switches(int argc, char *argv[], GucContext ctx, const char **dbname)
Definition: postgres.c:3302
void pq_getmsgend(StringInfo msg)
Definition: pqformat.c:677
void disable_timeout(TimeoutId id, bool keep_indicator)
Definition: timeout.c:525
void procsignal_sigusr1_handler(SIGNAL_ARGS)
Definition: procsignal.c:260
CommandDest whereToSendOutput
Definition: postgres.c:86
#define SIGCHLD
Definition: win32.h:206
static bool ignore_till_sync
Definition: postgres.c:149
void quickdie(SIGNAL_ARGS)
Definition: postgres.c:2556
MemoryContext PostmasterContext
Definition: mcxt.c:45
#define SIGUSR2
Definition: win32.h:212
static void exec_simple_query(const char *query_string)
Definition: postgres.c:880
int HandleFunctionRequest(StringInfo msgBuf)
Definition: fastpath.c:270
void InitializeGUCOptions(void)
Definition: guc.c:4428
void pgstat_report_stat(bool force)
Definition: pgstat.c:747
void DropPreparedStatement(const char *stmt_name, bool showError)
Definition: prepare.c:577
static void exec_describe_statement_message(const char *stmt_name)
Definition: postgres.c:2290
void process_postgres_switches ( int  argc,
char *  argv[],
GucContext  ctx,
const char **  dbname 
)

Definition at line 3302 of file postgres.c.

References EchoQuery, ereport, errcode(), errhint(), errmsg(), ERROR, FATAL, flag(), free, FrontendProtocol, get_stats_option_name(), getopt(), IsBinaryUpgrade, IsUnderPostmaster, MAXPGPATH, name, NULL, optarg, opterr, optind, OutputFileName, ParseLongOption(), PGC_POSTMASTER, PGC_S_ARGV, PGC_S_CLIENT, progname, set_debug_options(), set_plan_disabling_options(), SetConfigOption(), strlcpy(), userDoption, UseSemiNewlineNewline, and value.

Referenced by PostgresMain(), and process_startup_options().

3304 {
3305  bool secure = (ctx == PGC_POSTMASTER);
3306  int errs = 0;
3307  GucSource gucsource;
3308  int flag;
3309 
3310  if (secure)
3311  {
3312  gucsource = PGC_S_ARGV; /* switches came from command line */
3313 
3314  /* Ignore the initial --single argument, if present */
3315  if (argc > 1 && strcmp(argv[1], "--single") == 0)
3316  {
3317  argv++;
3318  argc--;
3319  }
3320  }
3321  else
3322  {
3323  gucsource = PGC_S_CLIENT; /* switches came from client */
3324  }
3325 
3326 #ifdef HAVE_INT_OPTERR
3327 
3328  /*
3329  * Turn this off because it's either printed to stderr and not the log
3330  * where we'd want it, or argv[0] is now "--single", which would make for
3331  * a weird error message. We print our own error message below.
3332  */
3333  opterr = 0;
3334 #endif
3335 
3336  /*
3337  * Parse command-line options. CAUTION: keep this in sync with
3338  * postmaster/postmaster.c (the option sets should not conflict) and with
3339  * the common help() function in main/main.c.
3340  */
3341  while ((flag = getopt(argc, argv, "B:bc:C:D:d:EeFf:h:ijk:lN:nOo:Pp:r:S:sTt:v:W:-:")) != -1)
3342  {
3343  switch (flag)
3344  {
3345  case 'B':
3346  SetConfigOption("shared_buffers", optarg, ctx, gucsource);
3347  break;
3348 
3349  case 'b':
3350  /* Undocumented flag used for binary upgrades */
3351  if (secure)
3352  IsBinaryUpgrade = true;
3353  break;
3354 
3355  case 'C':
3356  /* ignored for consistency with the postmaster */
3357  break;
3358 
3359  case 'D':
3360  if (secure)
3361  userDoption = strdup(optarg);
3362  break;
3363 
3364  case 'd':
3365  set_debug_options(atoi(optarg), ctx, gucsource);
3366  break;
3367 
3368  case 'E':
3369  if (secure)
3370  EchoQuery = true;
3371  break;
3372 
3373  case 'e':
3374  SetConfigOption("datestyle", "euro", ctx, gucsource);
3375  break;
3376 
3377  case 'F':
3378  SetConfigOption("fsync", "false", ctx, gucsource);
3379  break;
3380 
3381  case 'f':
3382  if (!set_plan_disabling_options(optarg, ctx, gucsource))
3383  errs++;
3384  break;
3385 
3386  case 'h':
3387  SetConfigOption("listen_addresses", optarg, ctx, gucsource);
3388  break;
3389 
3390  case 'i':
3391  SetConfigOption("listen_addresses", "*", ctx, gucsource);
3392  break;
3393 
3394  case 'j':
3395  if (secure)
3396  UseSemiNewlineNewline = true;
3397  break;
3398 
3399  case 'k':
3400  SetConfigOption("unix_socket_directories", optarg, ctx, gucsource);
3401  break;
3402 
3403  case 'l':
3404  SetConfigOption("ssl", "true", ctx, gucsource);
3405  break;
3406 
3407  case 'N':
3408  SetConfigOption("max_connections", optarg, ctx, gucsource);
3409  break;
3410 
3411  case 'n':
3412  /* ignored for consistency with postmaster */
3413  break;
3414 
3415  case 'O':
3416  SetConfigOption("allow_system_table_mods", "true", ctx, gucsource);
3417  break;
3418 
3419  case 'o':
3420  errs++;
3421  break;
3422 
3423  case 'P':
3424  SetConfigOption("ignore_system_indexes", "true", ctx, gucsource);
3425  break;
3426 
3427  case 'p':
3428  SetConfigOption("port", optarg, ctx, gucsource);
3429  break;
3430 
3431  case 'r':
3432  /* send output (stdout and stderr) to the given file */
3433  if (secure)
3435  break;
3436 
3437  case 'S':
3438  SetConfigOption("work_mem", optarg, ctx, gucsource);
3439  break;
3440 
3441  case 's':
3442  SetConfigOption("log_statement_stats", "true", ctx, gucsource);
3443  break;
3444 
3445  case 'T':
3446  /* ignored for consistency with the postmaster */
3447  break;
3448 
3449  case 't':
3450  {
3451  const char *tmp = get_stats_option_name(optarg);
3452 
3453  if (tmp)
3454  SetConfigOption(tmp, "true", ctx, gucsource);
3455  else
3456  errs++;
3457  break;
3458  }
3459 
3460  case 'v':
3461 
3462  /*
3463  * -v is no longer used in normal operation, since
3464  * FrontendProtocol is already set before we get here. We keep
3465  * the switch only for possible use in standalone operation,
3466  * in case we ever support using normal FE/BE protocol with a
3467  * standalone backend.
3468  */
3469  if (secure)
3471  break;
3472 
3473  case 'W':
3474  SetConfigOption("post_auth_delay", optarg, ctx, gucsource);
3475  break;
3476 
3477  case 'c':
3478  case '-':
3479  {
3480  char *name,
3481  *value;
3482 
3483  ParseLongOption(optarg, &name, &value);
3484  if (!value)
3485  {
3486  if (flag == '-')
3487  ereport(ERROR,
3488  (errcode(ERRCODE_SYNTAX_ERROR),
3489  errmsg("--%s requires a value",
3490  optarg)));
3491  else
3492  ereport(ERROR,
3493  (errcode(ERRCODE_SYNTAX_ERROR),
3494  errmsg("-c %s requires a value",
3495  optarg)));
3496  }
3497  SetConfigOption(name, value, ctx, gucsource);
3498  free(name);
3499  if (value)
3500  free(value);
3501  break;
3502  }
3503 
3504  default:
3505  errs++;
3506  break;
3507  }
3508 
3509  if (errs)
3510  break;
3511  }
3512 
3513  /*
3514  * Optional database name should be there only if *dbname is NULL.
3515  */
3516  if (!errs && dbname && *dbname == NULL && argc - optind >= 1)
3517  *dbname = strdup(argv[optind++]);
3518 
3519  if (errs || argc != optind)
3520  {
3521  if (errs)
3522  optind--; /* complain about the previous argument */
3523 
3524  /* spell the error message a bit differently depending on context */
3525  if (IsUnderPostmaster)
3526  ereport(FATAL,
3527  (errcode(ERRCODE_SYNTAX_ERROR),
3528  errmsg("invalid command-line argument for server process: %s", argv[optind]),
3529  errhint("Try \"%s --help\" for more information.", progname)));
3530  else
3531  ereport(FATAL,
3532  (errcode(ERRCODE_SYNTAX_ERROR),
3533  errmsg("%s: invalid command-line argument: %s",
3534  progname, argv[optind]),
3535  errhint("Try \"%s --help\" for more information.", progname)));
3536  }
3537 
3538  /*
3539  * Reset getopt(3) library so that it will work correctly in subprocesses
3540  * or when this function is called a second time with another array.
3541  */
3542  optind = 1;
3543 #ifdef HAVE_INT_OPTRESET
3544  optreset = 1; /* some systems need this too */
3545 #endif
3546 }
static struct @76 value
int errhint(const char *fmt,...)
Definition: elog.c:987
void ParseLongOption(const char *string, char **name, char **value)
Definition: guc.c:9332
bool set_plan_disabling_options(const char *arg, GucContext context, GucSource source)
Definition: postgres.c:3220
int errcode(int sqlerrcode)
Definition: elog.c:575
const char * get_stats_option_name(const char *arg)
Definition: postgres.c:3262
void set_debug_options(int debug_flag, GucContext context, GucSource source)
Definition: postgres.c:3191
const char * progname
Definition: pg_standby.c:37
bool IsBinaryUpgrade
Definition: globals.c:101
int getopt(int nargc, char *const *nargv, const char *ostr)
Definition: getopt.c:72
GucSource
Definition: guc.h:105
int optind
Definition: getopt.c:51
#define ERROR
Definition: elog.h:43
#define FATAL
Definition: elog.h:52
#define MAXPGPATH
char OutputFileName[MAXPGPATH]
Definition: globals.c:61
void SetConfigOption(const char *name, const char *value, GucContext context, GucSource source)
Definition: guc.c:6633
bool IsUnderPostmaster
Definition: globals.c:100
char * flag(int b)
Definition: test-ctype.c:33
int opterr
Definition: getopt.c:50
#define ereport(elevel, rest)
Definition: elog.h:122
uint32 ProtocolVersion
Definition: pqcomm.h:113
#define free(a)
Definition: header.h:60
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45
#define NULL
Definition: c.h:226
char * dbname
Definition: streamutil.c:41
const char * name
Definition: encode.c:521
static bool EchoQuery
Definition: postgres.c:160
static const char * userDoption
Definition: postgres.c:159
static bool UseSemiNewlineNewline
Definition: postgres.c:161
int errmsg(const char *fmt,...)
Definition: elog.c:797
char * optarg
Definition: getopt.c:53
ProtocolVersion FrontendProtocol
Definition: globals.c:27
void ProcessClientReadInterrupt ( bool  blocked)

Definition at line 522 of file postgres.c.

References catchupInterruptPending, CHECK_FOR_INTERRUPTS, DoingCommandRead, notifyInterruptPending, ProcDiePending, ProcessCatchupInterrupt(), and ProcessNotifyInterrupt().

Referenced by interactive_getc(), and secure_read().

523 {
524  int save_errno = errno;
525 
526  if (DoingCommandRead)
527  {
528  /* Check for general interrupts that arrived while reading */
530 
531  /* Process sinval catchup interrupts that happened while reading */
534 
535  /* Process sinval catchup interrupts that happened while reading */
538  }
539  else if (ProcDiePending && blocked)
540  {
541  /*
542  * We're dying. It's safe (and sane) to handle that now.
543  */
545  }
546 
547  errno = save_errno;
548 }
void ProcessCatchupInterrupt(void)
Definition: sinval.c:177
void ProcessNotifyInterrupt(void)
Definition: async.c:1726
static bool DoingCommandRead
Definition: postgres.c:142
volatile bool ProcDiePending
Definition: globals.c:31
volatile sig_atomic_t notifyInterruptPending
Definition: async.c:356
volatile sig_atomic_t catchupInterruptPending
Definition: sinval.c:41
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:97
void ProcessClientWriteInterrupt ( bool  blocked)

Definition at line 560 of file postgres.c.

References CHECK_FOR_INTERRUPTS, DestNone, DestRemote, ProcDiePending, and whereToSendOutput.

Referenced by secure_write().

561 {
562  int save_errno = errno;
563 
564  /*
565  * We only want to process the interrupt here if socket writes are
566  * blocking to increase the chance to get an error message to the client.
567  * If we're not blocked there'll soon be a CHECK_FOR_INTERRUPTS(). But if
568  * we're blocked we'll never get out of that situation if the client has
569  * died.
570  */
571  if (ProcDiePending && blocked)
572  {
573  /*
574  * We're dying. It's safe (and sane) to handle that now. But we don't
575  * want to send the client the error message as that a) would possibly
576  * block again b) would possibly lead to sending an error message to
577  * the client, while we already started to send something else.
578  */
581 
583  }
584 
585  errno = save_errno;
586 }
Definition: dest.h:88
volatile bool ProcDiePending
Definition: globals.c:31
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:97
CommandDest whereToSendOutput
Definition: postgres.c:86
void quickdie ( SIGNAL_ARGS  )

Definition at line 2556 of file postgres.c.

References BlockSig, ClientAuthInProgress, DestNone, DestRemote, ereport, errcode(), errdetail(), errhint(), errmsg(), HOLD_INTERRUPTS, on_exit_reset(), PG_SETMASK, SIGQUIT, WARNING, and whereToSendOutput.

Referenced by AutoVacLauncherMain(), AutoVacWorkerMain(), PostgresMain(), and WalSndSignals().

2557 {
2558  sigaddset(&BlockSig, SIGQUIT); /* prevent nested calls */
2559  PG_SETMASK(&BlockSig);
2560 
2561  /*
2562  * Prevent interrupts while exiting; though we just blocked signals that
2563  * would queue new interrupts, one may have been pending. We don't want a
2564  * quickdie() downgraded to a mere query cancel.
2565  */
2566  HOLD_INTERRUPTS();
2567 
2568  /*
2569  * If we're aborting out of client auth, don't risk trying to send
2570  * anything to the client; we will likely violate the protocol, not to
2571  * mention that we may have interrupted the guts of OpenSSL or some
2572  * authentication library.
2573  */
2576 
2577  /*
2578  * Ideally this should be ereport(FATAL), but then we'd not get control
2579  * back...
2580  */
2581  ereport(WARNING,
2582  (errcode(ERRCODE_CRASH_SHUTDOWN),
2583  errmsg("terminating connection because of crash of another server process"),
2584  errdetail("The postmaster has commanded this server process to roll back"
2585  " the current transaction and exit, because another"
2586  " server process exited abnormally and possibly corrupted"
2587  " shared memory."),
2588  errhint("In a moment you should be able to reconnect to the"
2589  " database and repeat your command.")));
2590 
2591  /*
2592  * We DO NOT want to run proc_exit() callbacks -- we're here because
2593  * shared memory may be corrupted, so we don't want to try to clean up our
2594  * transaction. Just nail the windows shut and get out of town. Now that
2595  * there's an atexit callback to prevent third-party code from breaking
2596  * things by calling exit() directly, we have to reset the callbacks
2597  * explicitly to make this work as intended.
2598  */
2599  on_exit_reset();
2600 
2601  /*
2602  * Note we do exit(2) not exit(0). This is to force the postmaster into a
2603  * system reset cycle if some idiot DBA sends a manual SIGQUIT to a random
2604  * backend. This is necessary precisely because we don't clean up our
2605  * shared memory state. (The "dead man switch" mechanism in pmsignal.c
2606  * should ensure the postmaster sees this as a crash, too, but no harm in
2607  * being doubly sure.)
2608  */
2609  exit(2);
2610 }
int errhint(const char *fmt,...)
Definition: elog.c:987
int errcode(int sqlerrcode)
Definition: elog.c:575
#define SIGQUIT
Definition: win32.h:197
#define PG_SETMASK(mask)
Definition: pqsignal.h:19
bool ClientAuthInProgress
Definition: postmaster.c:348
void on_exit_reset(void)
Definition: ipc.c:396
Definition: dest.h:88
int errdetail(const char *fmt,...)
Definition: elog.c:873
#define ereport(elevel, rest)
Definition: elog.h:122
#define WARNING
Definition: elog.h:40
sigset_t BlockSig
Definition: pqsignal.c:22
int errmsg(const char *fmt,...)
Definition: elog.c:797
#define HOLD_INTERRUPTS()
Definition: miscadmin.h:114
CommandDest whereToSendOutput
Definition: postgres.c:86
void RecoveryConflictInterrupt ( ProcSignalReason  reason)

Definition at line 2699 of file postgres.c.

References Assert, elog, FATAL, HoldingBufferPinThatDelaysRecovery(), InterruptPending, IsAbortedTransactionBlockState(), IsSubTransaction(), IsTransactionOrTransactionBlock(), IsWaitingForLock(), MyLatch, MyProc, proc_exit_inprogress, ProcDiePending, PROCSIG_RECOVERY_CONFLICT_BUFFERPIN, PROCSIG_RECOVERY_CONFLICT_DATABASE, PROCSIG_RECOVERY_CONFLICT_LOCK, PROCSIG_RECOVERY_CONFLICT_SNAPSHOT, PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK, PROCSIG_RECOVERY_CONFLICT_TABLESPACE, QueryCancelPending, PGPROC::recoveryConflictPending, RecoveryConflictPending, RecoveryConflictReason, RecoveryConflictRetryable, and SetLatch().

Referenced by procsignal_sigusr1_handler().

2700 {
2701  int save_errno = errno;
2702 
2703  /*
2704  * Don't joggle the elbow of proc_exit
2705  */
2706  if (!proc_exit_inprogress)
2707  {
2708  RecoveryConflictReason = reason;
2709  switch (reason)
2710  {
2712 
2713  /*
2714  * If we aren't waiting for a lock we can never deadlock.
2715  */
2716  if (!IsWaitingForLock())
2717  return;
2718 
2719  /* Intentional drop through to check wait for pin */
2720 
2722 
2723  /*
2724  * If we aren't blocking the Startup process there is nothing
2725  * more to do.
2726  */
2728  return;
2729 
2731 
2732  /* Intentional drop through to error handling */
2733 
2737 
2738  /*
2739  * If we aren't in a transaction any longer then ignore.
2740  */
2742  return;
2743 
2744  /*
2745  * If we can abort just the current subtransaction then we are
2746  * OK to throw an ERROR to resolve the conflict. Otherwise
2747  * drop through to the FATAL case.
2748  *
2749  * XXX other times that we can throw just an ERROR *may* be
2750  * PROCSIG_RECOVERY_CONFLICT_LOCK if no locks are held in
2751  * parent transactions
2752  *
2753  * PROCSIG_RECOVERY_CONFLICT_SNAPSHOT if no snapshots are held
2754  * by parent transactions and the transaction is not
2755  * transaction-snapshot mode
2756  *
2757  * PROCSIG_RECOVERY_CONFLICT_TABLESPACE if no temp files or
2758  * cursors open in parent transactions
2759  */
2760  if (!IsSubTransaction())
2761  {
2762  /*
2763  * If we already aborted then we no longer need to cancel.
2764  * We do this here since we do not wish to ignore aborted
2765  * subtransactions, which must cause FATAL, currently.
2766  */
2768  return;
2769 
2770  RecoveryConflictPending = true;
2771  QueryCancelPending = true;
2772  InterruptPending = true;
2773  break;
2774  }
2775 
2776  /* Intentional drop through to session cancel */
2777 
2779  RecoveryConflictPending = true;
2780  ProcDiePending = true;
2781  InterruptPending = true;
2782  break;
2783 
2784  default:
2785  elog(FATAL, "unrecognized conflict mode: %d",
2786  (int) reason);
2787  }
2788 
2790 
2791  /*
2792  * All conflicts apart from database cause dynamic errors where the
2793  * command or transaction can be retried at a later point with some
2794  * potential for success. No need to reset this, since non-retryable
2795  * conflict errors are currently FATAL.
2796  */
2797  if (reason == PROCSIG_RECOVERY_CONFLICT_DATABASE)
2798  RecoveryConflictRetryable = false;
2799  }
2800 
2801  /*
2802  * Set the process latch. This function essentially emulates signal
2803  * handlers like die() and StatementCancelHandler() and it seems prudent
2804  * to behave similarly as they do.
2805  */
2806  SetLatch(MyLatch);
2807 
2808  errno = save_errno;
2809 }
bool IsWaitingForLock(void)
Definition: proc.c:660
PGPROC * MyProc
Definition: proc.c:67
bool IsAbortedTransactionBlockState(void)
Definition: xact.c:369
bool IsTransactionOrTransactionBlock(void)
Definition: xact.c:4320
volatile bool QueryCancelPending
Definition: globals.c:30
#define FATAL
Definition: elog.h:52
bool recoveryConflictPending
Definition: proc.h:113
static ProcSignalReason RecoveryConflictReason
Definition: postgres.c:166
static bool RecoveryConflictPending
Definition: postgres.c:164
static bool RecoveryConflictRetryable
Definition: postgres.c:165
volatile bool InterruptPending
Definition: globals.c:29
void SetLatch(volatile Latch *latch)
Definition: latch.c:380
#define Assert(condition)
Definition: c.h:670
bool proc_exit_inprogress
Definition: ipc.c:40
bool HoldingBufferPinThatDelaysRecovery(void)
Definition: bufmgr.c:3675
bool IsSubTransaction(void)
Definition: xact.c:4374
volatile bool ProcDiePending
Definition: globals.c:31
struct Latch * MyLatch
Definition: globals.c:51
#define elog
Definition: elog.h:219
void ResetUsage ( void  )

Definition at line 4376 of file postgres.c.

References getrusage(), gettimeofday(), NULL, RUSAGE_SELF, Save_r, and Save_t.

Referenced by _bt_leafbuild(), _SPI_pquery(), btbuild(), exec_bind_message(), exec_execute_message(), exec_parse_message(), exec_simple_query(), pg_analyze_and_rewrite(), pg_analyze_and_rewrite_params(), pg_parse_query(), pg_plan_query(), pg_rewrite_query(), PortalRun(), and PortalRunMulti().

4377 {
4380 }
int gettimeofday(struct timeval *tp, struct timezone *tzp)
Definition: gettimeofday.c:105
static struct rusage Save_r
Definition: postgres.c:4372
int getrusage(int who, struct rusage *rusage)
Definition: getrusage.c:31
static struct timeval Save_t
Definition: postgres.c:4373
#define RUSAGE_SELF
Definition: rusagestub.h:23
#define NULL
Definition: c.h:226
void set_debug_options ( int  debug_flag,
GucContext  context,
GucSource  source 
)

Definition at line 3191 of file postgres.c.

References PGC_POSTMASTER, and SetConfigOption().

Referenced by PostmasterMain(), and process_postgres_switches().

3192 {
3193  if (debug_flag > 0)
3194  {
3195  char debugstr[64];
3196 
3197  sprintf(debugstr, "debug%d", debug_flag);
3198  SetConfigOption("log_min_messages", debugstr, context, source);
3199  }
3200  else
3201  SetConfigOption("log_min_messages", "notice", context, source);
3202 
3203  if (debug_flag >= 1 && context == PGC_POSTMASTER)
3204  {
3205  SetConfigOption("log_connections", "true", context, source);
3206  SetConfigOption("log_disconnections", "true", context, source);
3207  }
3208  if (debug_flag >= 2)
3209  SetConfigOption("log_statement", "all", context, source);
3210  if (debug_flag >= 3)
3211  SetConfigOption("debug_print_parse", "true", context, source);
3212  if (debug_flag >= 4)
3213  SetConfigOption("debug_print_plan", "true", context, source);
3214  if (debug_flag >= 5)
3215  SetConfigOption("debug_print_rewritten", "true", context, source);
3216 }
void SetConfigOption(const char *name, const char *value, GucContext context, GucSource source)
Definition: guc.c:6633
bool set_plan_disabling_options ( const char *  arg,
GucContext  context,
GucSource  source 
)

Definition at line 3220 of file postgres.c.

References NULL, and SetConfigOption().

Referenced by PostmasterMain(), and process_postgres_switches().

3221 {
3222  const char *tmp = NULL;
3223 
3224  switch (arg[0])
3225  {
3226  case 's': /* seqscan */
3227  tmp = "enable_seqscan";
3228  break;
3229  case 'i': /* indexscan */
3230  tmp = "enable_indexscan";
3231  break;
3232  case 'o': /* indexonlyscan */
3233  tmp = "enable_indexonlyscan";
3234  break;
3235  case 'b': /* bitmapscan */
3236  tmp = "enable_bitmapscan";
3237  break;
3238  case 't': /* tidscan */
3239  tmp = "enable_tidscan";
3240  break;
3241  case 'n': /* nestloop */
3242  tmp = "enable_nestloop";
3243  break;
3244  case 'm': /* mergejoin */
3245  tmp = "enable_mergejoin";
3246  break;
3247  case 'h': /* hashjoin */
3248  tmp = "enable_hashjoin";
3249  break;
3250  }
3251  if (tmp)
3252  {
3253  SetConfigOption(tmp, "false", context, source);
3254  return true;
3255  }
3256  else
3257  return false;
3258 }
void SetConfigOption(const char *name, const char *value, GucContext context, GucSource source)
Definition: guc.c:6633
#define NULL
Definition: c.h:226
void * arg
void ShowUsage ( const char *  title)

Definition at line 4383 of file postgres.c.

References appendStringInfo(), appendStringInfoString(), StringInfoData::data, ereport, errdetail_internal(), errmsg_internal(), getrusage(), gettimeofday(), initStringInfo(), StringInfoData::len, LOG, NULL, pfree(), rusage::ru_stime, rusage::ru_utime, RUSAGE_SELF, Save_r, and Save_t.

Referenced by _bt_leafbuild(), _SPI_pquery(), btbuild(), exec_bind_message(), exec_execute_message(), exec_parse_message(), exec_simple_query(), pg_analyze_and_rewrite(), pg_analyze_and_rewrite_params(), pg_parse_query(), pg_plan_query(), pg_rewrite_query(), PortalRun(), and PortalRunMulti().

4384 {
4385  StringInfoData str;
4386  struct timeval user,
4387  sys;
4388  struct timeval elapse_t;
4389  struct rusage r;
4390 
4391  getrusage(RUSAGE_SELF, &r);
4392  gettimeofday(&elapse_t, NULL);
4393  memcpy((char *) &user, (char *) &r.ru_utime, sizeof(user));
4394  memcpy((char *) &sys, (char *) &r.ru_stime, sizeof(sys));
4395  if (elapse_t.tv_usec < Save_t.tv_usec)
4396  {
4397  elapse_t.tv_sec--;
4398  elapse_t.tv_usec += 1000000;
4399  }
4400  if (r.ru_utime.tv_usec < Save_r.ru_utime.tv_usec)
4401  {
4402  r.ru_utime.tv_sec--;
4403  r.ru_utime.tv_usec += 1000000;
4404  }
4405  if (r.ru_stime.tv_usec < Save_r.ru_stime.tv_usec)
4406  {
4407  r.ru_stime.tv_sec--;
4408  r.ru_stime.tv_usec += 1000000;
4409  }
4410 
4411  /*
4412  * the only stats we don't show here are for memory usage -- i can't
4413  * figure out how to interpret the relevant fields in the rusage struct,
4414  * and they change names across o/s platforms, anyway. if you can figure
4415  * out what the entries mean, you can somehow extract resident set size,
4416  * shared text size, and unshared data and stack sizes.
4417  */
4418  initStringInfo(&str);
4419 
4420  appendStringInfoString(&str, "! system usage stats:\n");
4421  appendStringInfo(&str,
4422  "!\t%ld.%06ld s user, %ld.%06ld s system, %ld.%06ld s elapsed\n",
4423  (long) (r.ru_utime.tv_sec - Save_r.ru_utime.tv_sec),
4424  (long) (r.ru_utime.tv_usec - Save_r.ru_utime.tv_usec),
4425  (long) (r.ru_stime.tv_sec - Save_r.ru_stime.tv_sec),
4426  (long) (r.ru_stime.tv_usec - Save_r.ru_stime.tv_usec),
4427  (long) (elapse_t.tv_sec - Save_t.tv_sec),
4428  (long) (elapse_t.tv_usec - Save_t.tv_usec));
4429  appendStringInfo(&str,
4430  "!\t[%ld.%06ld s user, %ld.%06ld s system total]\n",
4431  (long) user.tv_sec,
4432  (long) user.tv_usec,
4433  (long) sys.tv_sec,
4434  (long) sys.tv_usec);
4435 #if defined(HAVE_GETRUSAGE)
4436  appendStringInfo(&str,
4437  "!\t%ld/%ld [%ld/%ld] filesystem blocks in/out\n",
4438  r.ru_inblock - Save_r.ru_inblock,
4439  /* they only drink coffee at dec */
4440  r.ru_oublock - Save_r.ru_oublock,
4441  r.ru_inblock, r.ru_oublock);
4442  appendStringInfo(&str,
4443  "!\t%ld/%ld [%ld/%ld] page faults/reclaims, %ld [%ld] swaps\n",
4444  r.ru_majflt - Save_r.ru_majflt,
4445  r.ru_minflt - Save_r.ru_minflt,
4446  r.ru_majflt, r.ru_minflt,
4447  r.ru_nswap - Save_r.ru_nswap,
4448  r.ru_nswap);
4449  appendStringInfo(&str,
4450  "!\t%ld [%ld] signals rcvd, %ld/%ld [%ld/%ld] messages rcvd/sent\n",
4451  r.ru_nsignals - Save_r.ru_nsignals,
4452  r.ru_nsignals,
4453  r.ru_msgrcv - Save_r.ru_msgrcv,
4454  r.ru_msgsnd - Save_r.ru_msgsnd,
4455  r.ru_msgrcv, r.ru_msgsnd);
4456  appendStringInfo(&str,
4457  "!\t%ld/%ld [%ld/%ld] voluntary/involuntary context switches\n",
4458  r.ru_nvcsw - Save_r.ru_nvcsw,
4459  r.ru_nivcsw - Save_r.ru_nivcsw,
4460  r.ru_nvcsw, r.ru_nivcsw);
4461 #endif /* HAVE_GETRUSAGE */
4462 
4463  /* remove trailing newline */
4464  if (str.data[str.len - 1] == '\n')
4465  str.data[--str.len] = '\0';
4466 
4467  ereport(LOG,
4468  (errmsg_internal("%s", title),
4469  errdetail_internal("%s", str.data)));
4470 
4471  pfree(str.data);
4472 }
int gettimeofday(struct timeval *tp, struct timezone *tzp)
Definition: gettimeofday.c:105
static struct rusage Save_r
Definition: postgres.c:4372
struct timeval ru_stime
Definition: rusagestub.h:29
int getrusage(int who, struct rusage *rusage)
Definition: getrusage.c:31
#define LOG
Definition: elog.h:26
int errdetail_internal(const char *fmt,...)
Definition: elog.c:900
void pfree(void *pointer)
Definition: mcxt.c:992
void appendStringInfo(StringInfo str, const char *fmt,...)
Definition: stringinfo.c:110
void appendStringInfoString(StringInfo str, const char *s)
Definition: stringinfo.c:189
static struct timeval Save_t
Definition: postgres.c:4373
#define ereport(elevel, rest)
Definition: elog.h:122
void initStringInfo(StringInfo str)
Definition: stringinfo.c:65
struct timeval ru_utime
Definition: rusagestub.h:28
#define RUSAGE_SELF
Definition: rusagestub.h:23
int errmsg_internal(const char *fmt,...)
Definition: elog.c:827
#define NULL
Definition: c.h:226
static char * user
Definition: pg_regress.c:90
void StatementCancelHandler ( SIGNAL_ARGS  )

Definition at line 2648 of file postgres.c.

References InterruptPending, MyLatch, proc_exit_inprogress, QueryCancelPending, and SetLatch().

Referenced by AutoVacLauncherMain(), AutoVacWorkerMain(), PostgresMain(), and StartBackgroundWorker().

2649 {
2650  int save_errno = errno;
2651 
2652  /*
2653  * Don't joggle the elbow of proc_exit
2654  */
2655  if (!proc_exit_inprogress)
2656  {
2657  InterruptPending = true;
2658  QueryCancelPending = true;
2659  }
2660 
2661  /* If we're still here, waken anything waiting on the process latch */
2662  SetLatch(MyLatch);
2663 
2664  errno = save_errno;
2665 }
volatile bool QueryCancelPending
Definition: globals.c:30
volatile bool InterruptPending
Definition: globals.c:29
void SetLatch(volatile Latch *latch)
Definition: latch.c:380
bool proc_exit_inprogress
Definition: ipc.c:40
struct Latch * MyLatch
Definition: globals.c:51

Variable Documentation

int log_statement

Definition at line 91 of file postgres.c.

Referenced by check_log_statement(), and HandleFunctionRequest().

int max_stack_depth

Definition at line 94 of file postgres.c.

Referenced by check_stack_depth().

int PostAuthDelay