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https://git.postgresql.org/git/postgresql.git
synced 2025-02-11 19:20:40 +08:00
Use AllocateFile(), FreeFile() and palloc() rather than fopen(), fclose()
and malloc() in pgstat.c, respectively. This simplifies error recovery, as well as being more consistent with the rest of the backend.
This commit is contained in:
Neil Conway
parent
e6f9bf9b7f
commit
6f1b3cf19c
@ -13,7 +13,7 @@
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*
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* Copyright (c) 2001-2004, PostgreSQL Global Development Group
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*
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* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.83 2004/10/25 06:27:21 neilc Exp $
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* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.84 2004/10/28 01:38:41 neilc Exp $
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* ----------
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*/
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#include "postgres.h"
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@ -42,6 +42,7 @@
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#include "miscadmin.h"
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#include "postmaster/postmaster.h"
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#include "storage/backendid.h"
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#include "storage/fd.h"
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#include "storage/ipc.h"
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#include "storage/pg_shmem.h"
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#include "storage/pmsignal.h"
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@ -682,7 +683,7 @@ pgstat_bestart(void)
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/* ----------
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* pgstat_report_activity() -
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*
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* Called in tcop/postgres.c to tell the collector what the backend
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* Called from tcop/postgres.c to tell the collector what the backend
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* is actually doing (usually "<IDLE>" or the start of the query to
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* be executed).
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* ----------
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@ -988,7 +989,7 @@ pgstat_ping(void)
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/*
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* Create or enlarge the pgStatTabstatMessages array
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*/
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static bool
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static void
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more_tabstat_space(void)
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{
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PgStat_MsgTabstat *newMessages;
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@ -998,39 +999,25 @@ more_tabstat_space(void)
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/* Create (another) quantum of message buffers */
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newMessages = (PgStat_MsgTabstat *)
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malloc(sizeof(PgStat_MsgTabstat) * TABSTAT_QUANTUM);
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if (newMessages == NULL)
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{
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ereport(LOG,
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(errcode(ERRCODE_OUT_OF_MEMORY),
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errmsg("out of memory")));
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return false;
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}
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MemoryContextAllocZero(TopMemoryContext,
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sizeof(PgStat_MsgTabstat) * TABSTAT_QUANTUM);
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/* Create or enlarge the pointer array */
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if (pgStatTabstatMessages == NULL)
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msgArray = (PgStat_MsgTabstat **)
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malloc(sizeof(PgStat_MsgTabstat *) * newAlloc);
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MemoryContextAlloc(TopMemoryContext,
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sizeof(PgStat_MsgTabstat *) * newAlloc);
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else
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msgArray = (PgStat_MsgTabstat **)
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realloc(pgStatTabstatMessages,
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sizeof(PgStat_MsgTabstat *) * newAlloc);
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if (msgArray == NULL)
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{
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free(newMessages);
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ereport(LOG,
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(errcode(ERRCODE_OUT_OF_MEMORY),
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errmsg("out of memory")));
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return false;
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}
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repalloc(pgStatTabstatMessages,
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sizeof(PgStat_MsgTabstat *) * newAlloc);
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MemSet(newMessages, 0, sizeof(PgStat_MsgTabstat) * TABSTAT_QUANTUM);
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for (i = 0; i < TABSTAT_QUANTUM; i++)
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msgArray[pgStatTabstatAlloc + i] = newMessages++;
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pgStatTabstatMessages = msgArray;
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pgStatTabstatAlloc = newAlloc;
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return true;
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Assert(pgStatTabstatUsed < pgStatTabstatAlloc);
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}
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/* ----------
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@ -1102,14 +1089,7 @@ pgstat_initstats(PgStat_Info *stats, Relation rel)
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* If we ran out of message buffers, we just allocate more.
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*/
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if (pgStatTabstatUsed >= pgStatTabstatAlloc)
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{
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if (!more_tabstat_space())
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{
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stats->no_stats = TRUE;
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return;
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}
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Assert(pgStatTabstatUsed < pgStatTabstatAlloc);
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}
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more_tabstat_space();
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/*
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* Use the first entry of the next message buffer.
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@ -1146,10 +1126,8 @@ pgstat_count_xact_commit(void)
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* new xact-counters.
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*/
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if (pgStatTabstatAlloc == 0)
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{
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if (!more_tabstat_space())
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return;
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}
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more_tabstat_space();
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if (pgStatTabstatUsed == 0)
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{
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pgStatTabstatUsed++;
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@ -1180,10 +1158,8 @@ pgstat_count_xact_rollback(void)
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* new xact-counters.
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*/
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if (pgStatTabstatAlloc == 0)
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{
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if (!more_tabstat_space())
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return;
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}
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more_tabstat_space();
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if (pgStatTabstatUsed == 0)
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{
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pgStatTabstatUsed++;
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@ -1529,13 +1505,8 @@ PgstatCollectorMain(int argc, char *argv[])
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/*
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* Create the known backends table
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*/
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pgStatBeTable = (PgStat_StatBeEntry *) malloc(
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pgStatBeTable = (PgStat_StatBeEntry *) palloc0(
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sizeof(PgStat_StatBeEntry) * MaxBackends);
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if (pgStatBeTable == NULL)
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ereport(ERROR,
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(errcode(ERRCODE_OUT_OF_MEMORY),
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errmsg("out of memory in statistics collector --- abort")));
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memset(pgStatBeTable, 0, sizeof(PgStat_StatBeEntry) * MaxBackends);
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readPipe = pgStatPipe[0];
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@ -1804,11 +1775,7 @@ pgstat_recvbuffer(void)
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/*
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* Allocate the message buffer
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*/
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msgbuffer = (char *) malloc(PGSTAT_RECVBUFFERSZ);
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if (msgbuffer == NULL)
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ereport(ERROR,
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(errcode(ERRCODE_OUT_OF_MEMORY),
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errmsg("out of memory in statistics collector --- abort")));
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msgbuffer = (char *) palloc(PGSTAT_RECVBUFFERSZ);
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/*
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* Loop forever
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@ -2416,7 +2383,7 @@ pgstat_read_statsfile(HTAB **dbhash, Oid onlydb,
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* simply return zero for anything and the collector simply starts
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* from scratch with empty counters.
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*/
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if ((fpin = fopen(pgStat_fname, PG_BINARY_R)) == NULL)
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if ((fpin = AllocateFile(pgStat_fname, PG_BINARY_R)) == NULL)
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return;
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/*
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@ -2437,8 +2404,7 @@ pgstat_read_statsfile(HTAB **dbhash, Oid onlydb,
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{
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ereport(pgStatRunningInCollector ? LOG : WARNING,
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(errmsg("corrupted pgstat.stat file")));
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fclose(fpin);
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return;
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goto done;
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}
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/*
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@ -2450,7 +2416,6 @@ pgstat_read_statsfile(HTAB **dbhash, Oid onlydb,
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&found);
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if (dbentry == NULL)
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{
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fclose(fpin);
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ereport(ERROR,
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(errcode(ERRCODE_OUT_OF_MEMORY),
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errmsg("out of memory")));
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@ -2459,8 +2424,7 @@ pgstat_read_statsfile(HTAB **dbhash, Oid onlydb,
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{
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ereport(pgStatRunningInCollector ? LOG : WARNING,
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(errmsg("corrupted pgstat.stat file")));
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fclose(fpin);
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return;
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goto done;
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}
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memcpy(dbentry, &dbbuf, sizeof(PgStat_StatDBEntry));
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@ -2479,19 +2443,10 @@ pgstat_read_statsfile(HTAB **dbhash, Oid onlydb,
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hash_ctl.entrysize = sizeof(PgStat_StatTabEntry);
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hash_ctl.hash = tag_hash;
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hash_ctl.hcxt = use_mcxt;
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PG_TRY();
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{
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dbentry->tables = hash_create("Per-database table",
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PGSTAT_TAB_HASH_SIZE,
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&hash_ctl,
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HASH_ELEM | HASH_FUNCTION | mcxt_flags);
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}
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PG_CATCH();
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{
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fclose(fpin);
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PG_RE_THROW();
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}
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PG_END_TRY();
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dbentry->tables = hash_create("Per-database table",
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PGSTAT_TAB_HASH_SIZE,
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&hash_ctl,
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HASH_ELEM | HASH_FUNCTION | mcxt_flags);
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/*
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* Arrange that following 'T's add entries to this
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@ -2515,8 +2470,7 @@ pgstat_read_statsfile(HTAB **dbhash, Oid onlydb,
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{
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ereport(pgStatRunningInCollector ? LOG : WARNING,
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(errmsg("corrupted pgstat.stat file")));
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fclose(fpin);
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return;
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goto done;
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}
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/*
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@ -2529,19 +2483,15 @@ pgstat_read_statsfile(HTAB **dbhash, Oid onlydb,
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(void *) &tabbuf.tableid,
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HASH_ENTER, &found);
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if (tabentry == NULL)
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{
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fclose(fpin);
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ereport(ERROR,
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(errcode(ERRCODE_OUT_OF_MEMORY),
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errmsg("out of memory")));
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}
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if (found)
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{
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ereport(pgStatRunningInCollector ? LOG : WARNING,
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(errmsg("corrupted pgstat.stat file")));
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fclose(fpin);
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return;
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goto done;
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}
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memcpy(tabentry, &tabbuf, sizeof(tabbuf));
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@ -2552,30 +2502,23 @@ pgstat_read_statsfile(HTAB **dbhash, Oid onlydb,
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*/
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case 'M':
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if (betab == NULL || numbackends == NULL)
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{
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fclose(fpin);
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return;
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}
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goto done;
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if (fread(&maxbackends, 1, sizeof(maxbackends), fpin) !=
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sizeof(maxbackends))
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{
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ereport(pgStatRunningInCollector ? LOG : WARNING,
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(errmsg("corrupted pgstat.stat file")));
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fclose(fpin);
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return;
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goto done;
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}
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if (maxbackends == 0)
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{
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fclose(fpin);
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return;
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}
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goto done;
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/*
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* Allocate space (in TopTransactionContext too) for the
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* backend table.
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*/
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if (use_mcxt == NULL)
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*betab = (PgStat_StatBeEntry *) malloc(
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*betab = (PgStat_StatBeEntry *) palloc(
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sizeof(PgStat_StatBeEntry) * maxbackends);
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else
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*betab = (PgStat_StatBeEntry *) MemoryContextAlloc(
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@ -2587,16 +2530,8 @@ pgstat_read_statsfile(HTAB **dbhash, Oid onlydb,
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* 'B' A PgStat_StatBeEntry follows.
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*/
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case 'B':
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if (betab == NULL || numbackends == NULL)
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{
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fclose(fpin);
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return;
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}
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if (*betab == NULL)
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{
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fclose(fpin);
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return;
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}
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if (betab == NULL || numbackends == NULL || *betab == NULL)
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goto done;
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/*
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* Read it directly into the table.
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@ -2607,8 +2542,7 @@ pgstat_read_statsfile(HTAB **dbhash, Oid onlydb,
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{
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ereport(pgStatRunningInCollector ? LOG : WARNING,
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(errmsg("corrupted pgstat.stat file")));
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fclose(fpin);
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return;
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goto done;
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}
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/*
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@ -2624,28 +2558,25 @@ pgstat_read_statsfile(HTAB **dbhash, Oid onlydb,
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if (numbackends != 0)
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*numbackends = havebackends;
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if (havebackends >= maxbackends)
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{
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fclose(fpin);
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return;
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}
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goto done;
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break;
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/*
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* 'E' The EOF marker of a complete stats file.
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*/
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case 'E':
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fclose(fpin);
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return;
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goto done;
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default:
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ereport(pgStatRunningInCollector ? LOG : WARNING,
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(errmsg("corrupted pgstat.stat file")));
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fclose(fpin);
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return;
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goto done;
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}
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}
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fclose(fpin);
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done:
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FreeFile(fpin);
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}
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/*
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