Repair an error introduced by log_line_prefix patch: it is not acceptable
to assume that the string pointer passed to set_ps_display is good forever. There's no need to anyway since ps_status.c itself saves the string, and we already had an API (get_ps_display) to return it. I believe this explains Jim Nasby's report of intermittent crashes in elog.c when %i format code is in use in log_line_prefix. While at it, repair a previously unnoticed problem: on some platforms such as Darwin, the string returned by get_ps_display was blank-padded to the maximum length, meaning that lock.c's attempt to append " waiting" to it never worked.
This commit is contained in:
Tom Lane
parent
95af2633c3
commit
48052de722
|
|
@ -37,7 +37,7 @@
|
|||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.474 2005/11/03 20:02:50 alvherre Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.475 2005/11/05 03:04:52 tgl Exp $
|
||||
*
|
||||
* NOTES
|
||||
*
|
||||
|
|
@ -2647,7 +2647,6 @@ BackendRun(Port *port)
|
|||
/* set these to empty in case they are needed before we set them up */
|
||||
port->remote_host = "";
|
||||
port->remote_port = "";
|
||||
port->commandTag = "";
|
||||
|
||||
/*
|
||||
* Initialize libpq and enable reporting of ereport errors to the client.
|
||||
|
|
|
|||
|
|
@ -8,7 +8,7 @@
|
|||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/storage/lmgr/lock.c,v 1.158 2005/10/15 02:49:26 momjian Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/storage/lmgr/lock.c,v 1.159 2005/11/05 03:04:52 tgl Exp $
|
||||
*
|
||||
* NOTES
|
||||
* Outside modules can create a lock table and acquire/release
|
||||
|
|
@ -1049,21 +1049,21 @@ WaitOnLock(LOCKMETHODID lockmethodid, LOCALLOCK *locallock,
|
|||
ResourceOwner owner)
|
||||
{
|
||||
LockMethod lockMethodTable = LockMethods[lockmethodid];
|
||||
char *new_status,
|
||||
*old_status;
|
||||
size_t len;
|
||||
const char *old_status;
|
||||
char *new_status;
|
||||
int len;
|
||||
|
||||
Assert(lockmethodid < NumLockMethods);
|
||||
|
||||
LOCK_PRINT("WaitOnLock: sleeping on lock",
|
||||
locallock->lock, locallock->tag.mode);
|
||||
|
||||
old_status = pstrdup(get_ps_display());
|
||||
len = strlen(old_status);
|
||||
old_status = get_ps_display(&len);
|
||||
new_status = (char *) palloc(len + 8 + 1);
|
||||
memcpy(new_status, old_status, len);
|
||||
strcpy(new_status + len, " waiting");
|
||||
set_ps_display(new_status);
|
||||
new_status[len] = '\0'; /* truncate off " waiting" */
|
||||
|
||||
awaitedLock = locallock;
|
||||
awaitedOwner = owner;
|
||||
|
|
@ -1104,8 +1104,7 @@ WaitOnLock(LOCKMETHODID lockmethodid, LOCALLOCK *locallock,
|
|||
|
||||
awaitedLock = NULL;
|
||||
|
||||
set_ps_display(old_status);
|
||||
pfree(old_status);
|
||||
set_ps_display(new_status);
|
||||
pfree(new_status);
|
||||
|
||||
LOCK_PRINT("WaitOnLock: wakeup on lock",
|
||||
|
|
|
|||
|
|
@ -42,7 +42,7 @@
|
|||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/utils/error/elog.c,v 1.166 2005/11/03 17:11:39 alvherre Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/utils/error/elog.c,v 1.167 2005/11/05 03:04:52 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -67,6 +67,7 @@
|
|||
#include "tcop/tcopprot.h"
|
||||
#include "utils/memutils.h"
|
||||
#include "utils/guc.h"
|
||||
#include "utils/ps_status.h"
|
||||
|
||||
|
||||
/* Global variables */
|
||||
|
|
@ -1484,19 +1485,26 @@ log_line_prefix(StringInfo buf)
|
|||
break;
|
||||
case 'i':
|
||||
if (MyProcPort)
|
||||
appendStringInfo(buf, "%s", MyProcPort->commandTag);
|
||||
{
|
||||
const char *psdisp;
|
||||
int displen;
|
||||
|
||||
psdisp = get_ps_display(&displen);
|
||||
appendStringInfo(buf, "%.*s", displen, psdisp);
|
||||
}
|
||||
break;
|
||||
case 'r':
|
||||
if (MyProcPort)
|
||||
if (MyProcPort && MyProcPort->remote_host)
|
||||
{
|
||||
appendStringInfo(buf, "%s", MyProcPort->remote_host);
|
||||
if (strlen(MyProcPort->remote_port) > 0)
|
||||
if (MyProcPort->remote_port &&
|
||||
MyProcPort->remote_port[0] != '\0')
|
||||
appendStringInfo(buf, "(%s)",
|
||||
MyProcPort->remote_port);
|
||||
}
|
||||
break;
|
||||
case 'h':
|
||||
if (MyProcPort)
|
||||
if (MyProcPort && MyProcPort->remote_host)
|
||||
appendStringInfo(buf, "%s", MyProcPort->remote_host);
|
||||
break;
|
||||
case 'q':
|
||||
|
|
|
|||
|
|
@ -5,7 +5,7 @@
|
|||
* to contain some useful information. Mechanism differs wildly across
|
||||
* platforms.
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/backend/utils/misc/ps_status.c,v 1.25 2005/10/15 02:49:36 momjian Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/utils/misc/ps_status.c,v 1.26 2005/11/05 03:04:52 tgl Exp $
|
||||
*
|
||||
* Copyright (c) 2000-2005, PostgreSQL Global Development Group
|
||||
* various details abducted from various places
|
||||
|
|
@ -307,10 +307,6 @@ init_ps_display(const char *username, const char *dbname,
|
|||
void
|
||||
set_ps_display(const char *activity)
|
||||
{
|
||||
/* save tag for possible use by elog.c */
|
||||
if (MyProcPort)
|
||||
MyProcPort->commandTag = activity;
|
||||
|
||||
#ifndef PS_USE_NONE
|
||||
/* no ps display for stand-alone backend */
|
||||
if (!IsUnderPostmaster)
|
||||
|
|
@ -365,15 +361,31 @@ set_ps_display(const char *activity)
|
|||
|
||||
/*
|
||||
* Returns what's currently in the ps display, in case someone needs
|
||||
* it. Note that only the activity part is returned.
|
||||
* it. Note that only the activity part is returned. On some platforms
|
||||
* the string will not be null-terminated, so return the effective
|
||||
* length into *displen.
|
||||
*/
|
||||
const char *
|
||||
get_ps_display(void)
|
||||
get_ps_display(int *displen)
|
||||
{
|
||||
#ifdef PS_USE_CLOBBER_ARGV
|
||||
size_t offset;
|
||||
|
||||
/* If ps_buffer is a pointer, it might still be null */
|
||||
if (!ps_buffer)
|
||||
{
|
||||
*displen = 0;
|
||||
return "";
|
||||
}
|
||||
|
||||
/* Remove any trailing spaces to offset the effect of PS_PADDING */
|
||||
offset = ps_buffer_size;
|
||||
while (offset > ps_buffer_fixed_size && ps_buffer[offset-1] == PS_PADDING)
|
||||
offset--;
|
||||
|
||||
*displen = offset - ps_buffer_fixed_size;
|
||||
#else
|
||||
*displen = strlen(ps_buffer + ps_buffer_fixed_size);
|
||||
#endif
|
||||
|
||||
return ps_buffer + ps_buffer_fixed_size;
|
||||
|
|
|
|||
|
|
@ -11,7 +11,7 @@
|
|||
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/libpq/libpq-be.h,v 1.52 2005/10/15 02:49:44 momjian Exp $
|
||||
* $PostgreSQL: pgsql/src/include/libpq/libpq-be.h,v 1.53 2005/11/05 03:04:53 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -80,7 +80,6 @@ typedef struct Port
|
|||
* but since it gets used by elog.c in the same way as database_name and
|
||||
* other members of this struct, we may as well keep it here.
|
||||
*/
|
||||
const char *commandTag; /* current command tag */
|
||||
struct timeval session_start; /* for session duration logging */
|
||||
|
||||
/*
|
||||
|
|
|
|||
|
|
@ -4,7 +4,7 @@
|
|||
*
|
||||
* Declarations for backend/utils/misc/ps_status.c
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/utils/ps_status.h,v 1.25 2004/02/22 21:26:54 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/include/utils/ps_status.h,v 1.26 2005/11/05 03:04:53 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -19,6 +19,6 @@ extern void init_ps_display(const char *username, const char *dbname,
|
|||
|
||||
extern void set_ps_display(const char *activity);
|
||||
|
||||
extern const char *get_ps_display(void);
|
||||
extern const char *get_ps_display(int *displen);
|
||||
|
||||
#endif /* PS_STATUS_H */
|
||||
|
|
|
|||
Loading…
Reference in New Issue