..which should no longer be needed since it was a performance hack for specific
platform snprintf, which are no longer used.
>From dacde652145e65e8de0a0cb7349c9f5f10314243 Mon Sep 17 00:00:00 2001
From: Justin Pryzby <pryz...@telsasoft.com>
Date: Fri, 31 Jul 2020 21:53:01 -0500
Subject: [PATCH v1] elog.c: Remove special case which avoided %*s format
strings..
..which should no longer be needed since it was a performance hack for specific
platform snprintf, which are no longer used.
See also:
4334639f4 Allow printf-style padding specifications in log_line_prefix.
96bf88d52 Always use our own versions of *printf().
abd9ca377 Make assorted performance improvements in snprintf.c.
---
src/backend/utils/error/elog.c | 134 ++++++++-------------------------
1 file changed, 32 insertions(+), 102 deletions(-)
diff --git a/src/backend/utils/error/elog.c b/src/backend/utils/error/elog.c
index d0b368530e..6b6749965f 100644
--- a/src/backend/utils/error/elog.c
+++ b/src/backend/utils/error/elog.c
@@ -2350,11 +2350,6 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
* Note: Since only '-', '0' to '9' are valid formatting characters we
* can do a quick check here to pre-check for formatting. If the char
* is not formatting then we can skip a useless function call.
- *
- * Further note: At least on some platforms, passing %*s rather than
- * %s to appendStringInfo() is substantially slower, so many of the
- * cases below avoid doing that unless non-zero padding is in fact
- * specified.
*/
if (*p > '9')
padding = 0;
@@ -2371,10 +2366,7 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
if (appname == NULL || *appname == '\0')
appname = _("[unknown]");
- if (padding != 0)
- appendStringInfo(buf, "%*s", padding, appname);
- else
- appendStringInfoString(buf, appname);
+ appendStringInfo(buf, "%*s", padding, appname);
}
else if (padding != 0)
appendStringInfoSpaces(buf,
@@ -2392,10 +2384,7 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
else
backend_type_str = GetBackendTypeDesc(MyBackendType);
- if (padding != 0)
- appendStringInfo(buf, "%*s", padding, backend_type_str);
- else
- appendStringInfoString(buf, backend_type_str);
+ appendStringInfo(buf, "%*s", padding, backend_type_str);
break;
}
case 'u':
@@ -2405,10 +2394,7 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
if (username == NULL || *username == '\0')
username = _("[unknown]");
- if (padding != 0)
- appendStringInfo(buf, "%*s", padding, username);
- else
- appendStringInfoString(buf, username);
+ appendStringInfo(buf, "%*s", padding, username);
}
else if (padding != 0)
appendStringInfoSpaces(buf,
@@ -2421,17 +2407,13 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
if (dbname == NULL || *dbname == '\0')
dbname = _("[unknown]");
- if (padding != 0)
- appendStringInfo(buf, "%*s", padding, dbname);
- else
- appendStringInfoString(buf, dbname);
+ appendStringInfo(buf, "%*s", padding, dbname);
}
else if (padding != 0)
appendStringInfoSpaces(buf,
padding > 0 ? padding : -padding);
break;
case 'c':
- if (padding != 0)
{
char strfbuf[128];
@@ -2439,14 +2421,9 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
(long) (MyStartTime), MyProcPid);
appendStringInfo(buf, "%*s", padding, strfbuf);
}
- else
- appendStringInfo(buf, "%lx.%x", (long) (MyStartTime), MyProcPid);
break;
case 'p':
- if (padding != 0)
- appendStringInfo(buf, "%*d", padding, MyProcPid);
- else
- appendStringInfo(buf, "%d", MyProcPid);
+ appendStringInfo(buf, "%*d", padding, MyProcPid);
break;
case 'P':
@@ -2472,17 +2449,11 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
break;
case 'l':
- if (padding != 0)
- appendStringInfo(buf, "%*ld", padding, log_line_number);
- else
- appendStringInfo(buf, "%ld", log_line_number);
+ appendStringInfo(buf, "%*ld", padding, log_line_number);
break;
case 'm':
setup_formatted_log_time();
- if (padding != 0)
- appendStringInfo(buf, "%*s", padding, formatted_log_time);
- else
- appendStringInfoString(buf, formatted_log_time);
+ appendStringInfo(buf, "%*s", padding, formatted_log_time);
break;
case 't':
{
@@ -2492,10 +2463,7 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
pg_strftime(strfbuf, sizeof(strfbuf),
"%Y-%m-%d %H:%M:%S %Z",
pg_localtime(&stamp_time, log_timezone));
- if (padding != 0)
- appendStringInfo(buf, "%*s", padding, strfbuf);
- else
- appendStringInfoString(buf, strfbuf);
+ appendStringInfo(buf, "%*s", padding, strfbuf);
}
break;
case 'n':
@@ -2512,19 +2480,13 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
(long) saved_timeval.tv_sec,
(int) (saved_timeval.tv_usec / 1000));
- if (padding != 0)
- appendStringInfo(buf, "%*s", padding, strfbuf);
- else
- appendStringInfoString(buf, strfbuf);
+ appendStringInfo(buf, "%*s", padding, strfbuf);
}
break;
case 's':
if (formatted_start_time[0] == '\0')
setup_formatted_start_time();
- if (padding != 0)
- appendStringInfo(buf, "%*s", padding, formatted_start_time);
- else
- appendStringInfoString(buf, formatted_start_time);
+ appendStringInfo(buf, "%*s", padding, formatted_start_time);
break;
case 'i':
if (MyProcPort)
@@ -2533,10 +2495,7 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
int displen;
psdisp = get_ps_display(&displen);
- if (padding != 0)
- appendStringInfo(buf, "%*s", padding, psdisp);
- else
- appendBinaryStringInfo(buf, psdisp, displen);
+ appendStringInfo(buf, "%*s", padding, psdisp);
}
else if (padding != 0)
@@ -2546,37 +2505,24 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
case 'r':
if (MyProcPort && MyProcPort->remote_host)
{
- if (padding != 0)
+ if (MyProcPort->remote_port && MyProcPort->remote_port[0] != '\0')
{
- if (MyProcPort->remote_port && MyProcPort->remote_port[0] != '\0')
- {
- /*
- * This option is slightly special as the port
- * number may be appended onto the end. Here we
- * need to build 1 string which contains the
- * remote_host and optionally the remote_port (if
- * set) so we can properly align the string.
- */
-
- char *hostport;
-
- hostport = psprintf("%s(%s)", MyProcPort->remote_host, MyProcPort->remote_port);
- appendStringInfo(buf, "%*s", padding, hostport);
- pfree(hostport);
- }
- else
- appendStringInfo(buf, "%*s", padding, MyProcPort->remote_host);
+ /*
+ * This option is slightly special as the port
+ * number may be appended onto the end. Here we
+ * need to build 1 string which contains the
+ * remote_host and optionally the remote_port (if
+ * set) so we can properly align the string.
+ */
+
+ char *hostport;
+
+ hostport = psprintf("%s(%s)", MyProcPort->remote_host, MyProcPort->remote_port);
+ appendStringInfo(buf, "%*s", padding, hostport);
+ pfree(hostport);
}
else
- {
- /* padding is 0, so we don't need a temp buffer */
- appendStringInfoString(buf, MyProcPort->remote_host);
- if (MyProcPort->remote_port &&
- MyProcPort->remote_port[0] != '\0')
- appendStringInfo(buf, "(%s)",
- MyProcPort->remote_port);
- }
-
+ appendStringInfo(buf, "%*s", padding, MyProcPort->remote_host);
}
else if (padding != 0)
appendStringInfoSpaces(buf,
@@ -2584,12 +2530,7 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
break;
case 'h':
if (MyProcPort && MyProcPort->remote_host)
- {
- if (padding != 0)
- appendStringInfo(buf, "%*s", padding, MyProcPort->remote_host);
- else
- appendStringInfoString(buf, MyProcPort->remote_host);
- }
+ appendStringInfo(buf, "%*s", padding, MyProcPort->remote_host);
else if (padding != 0)
appendStringInfoSpaces(buf,
padding > 0 ? padding : -padding);
@@ -2604,32 +2545,21 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
/* keep VXID format in sync with lockfuncs.c */
if (MyProc != NULL && MyProc->backendId != InvalidBackendId)
{
- if (padding != 0)
- {
- char strfbuf[128];
+ char strfbuf[128];
- snprintf(strfbuf, sizeof(strfbuf) - 1, "%d/%u",
- MyProc->backendId, MyProc->lxid);
+ snprintf(strfbuf, sizeof(strfbuf) - 1, "%d/%u",
+ MyProc->backendId, MyProc->lxid);
appendStringInfo(buf, "%*s", padding, strfbuf);
- }
- else
- appendStringInfo(buf, "%d/%u", MyProc->backendId, MyProc->lxid);
}
else if (padding != 0)
appendStringInfoSpaces(buf,
padding > 0 ? padding : -padding);
break;
case 'x':
- if (padding != 0)
- appendStringInfo(buf, "%*u", padding, GetTopTransactionIdIfAny());
- else
- appendStringInfo(buf, "%u", GetTopTransactionIdIfAny());
+ appendStringInfo(buf, "%*u", padding, GetTopTransactionIdIfAny());
break;
case 'e':
- if (padding != 0)
- appendStringInfo(buf, "%*s", padding, unpack_sql_state(edata->sqlerrcode));
- else
- appendStringInfoString(buf, unpack_sql_state(edata->sqlerrcode));
+ appendStringInfo(buf, "%*s", padding, unpack_sql_state(edata->sqlerrcode));
break;
default:
/* format error - ignore it */
--
2.17.0
