qemu/util/qemu-error.c
Seiji Aguchi 5e2ac51917 add timestamp to error_report()
[Issue]
When we offer a customer support service and a problem happens
in a customer's system, we try to understand the problem by
comparing what the customer reports with message logs of the
customer's system.

In this case, we often need to know when the problem happens.

But, currently, there is no timestamp in qemu's error messages.
Therefore, we may not be able to understand the problem based on
error messages.

[Solution]
Add a timestamp to qemu's error message logged by
error_report() with g_time_val_to_iso8601().

Signed-off-by: Seiji Aguchi <seiji.aguchi@hds.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-07-10 13:42:09 -04:00

226 lines
4.6 KiB
C

/*
* Error reporting
*
* Copyright (C) 2010 Red Hat Inc.
*
* Authors:
* Markus Armbruster <armbru@redhat.com>,
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include <stdio.h>
#include "monitor/monitor.h"
/*
* Print to current monitor if we have one, else to stderr.
* TODO should return int, so callers can calculate width, but that
* requires surgery to monitor_vprintf(). Left for another day.
*/
void error_vprintf(const char *fmt, va_list ap)
{
if (cur_mon) {
monitor_vprintf(cur_mon, fmt, ap);
} else {
vfprintf(stderr, fmt, ap);
}
}
/*
* Print to current monitor if we have one, else to stderr.
* TODO just like error_vprintf()
*/
void error_printf(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
error_vprintf(fmt, ap);
va_end(ap);
}
void error_printf_unless_qmp(const char *fmt, ...)
{
va_list ap;
if (!monitor_cur_is_qmp()) {
va_start(ap, fmt);
error_vprintf(fmt, ap);
va_end(ap);
}
}
static Location std_loc = {
.kind = LOC_NONE
};
static Location *cur_loc = &std_loc;
/*
* Push location saved in LOC onto the location stack, return it.
* The top of that stack is the current location.
* Needs a matching loc_pop().
*/
Location *loc_push_restore(Location *loc)
{
assert(!loc->prev);
loc->prev = cur_loc;
cur_loc = loc;
return loc;
}
/*
* Initialize *LOC to "nowhere", push it onto the location stack.
* The top of that stack is the current location.
* Needs a matching loc_pop().
* Return LOC.
*/
Location *loc_push_none(Location *loc)
{
loc->kind = LOC_NONE;
loc->prev = NULL;
return loc_push_restore(loc);
}
/*
* Pop the location stack.
* LOC must be the current location, i.e. the top of the stack.
*/
Location *loc_pop(Location *loc)
{
assert(cur_loc == loc && loc->prev);
cur_loc = loc->prev;
loc->prev = NULL;
return loc;
}
/*
* Save the current location in LOC, return LOC.
*/
Location *loc_save(Location *loc)
{
*loc = *cur_loc;
loc->prev = NULL;
return loc;
}
/*
* Change the current location to the one saved in LOC.
*/
void loc_restore(Location *loc)
{
Location *prev = cur_loc->prev;
assert(!loc->prev);
*cur_loc = *loc;
cur_loc->prev = prev;
}
/*
* Change the current location to "nowhere in particular".
*/
void loc_set_none(void)
{
cur_loc->kind = LOC_NONE;
}
/*
* Change the current location to argument ARGV[IDX..IDX+CNT-1].
*/
void loc_set_cmdline(char **argv, int idx, int cnt)
{
cur_loc->kind = LOC_CMDLINE;
cur_loc->num = cnt;
cur_loc->ptr = argv + idx;
}
/*
* Change the current location to file FNAME, line LNO.
*/
void loc_set_file(const char *fname, int lno)
{
assert (fname || cur_loc->kind == LOC_FILE);
cur_loc->kind = LOC_FILE;
cur_loc->num = lno;
if (fname) {
cur_loc->ptr = fname;
}
}
static const char *progname;
/*
* Set the program name for error_print_loc().
*/
void error_set_progname(const char *argv0)
{
const char *p = strrchr(argv0, '/');
progname = p ? p + 1 : argv0;
}
const char *error_get_progname(void)
{
return progname;
}
/*
* Print current location to current monitor if we have one, else to stderr.
*/
void error_print_loc(void)
{
const char *sep = "";
int i;
const char *const *argp;
if (!cur_mon && progname) {
fprintf(stderr, "%s:", progname);
sep = " ";
}
switch (cur_loc->kind) {
case LOC_CMDLINE:
argp = cur_loc->ptr;
for (i = 0; i < cur_loc->num; i++) {
error_printf("%s%s", sep, argp[i]);
sep = " ";
}
error_printf(": ");
break;
case LOC_FILE:
error_printf("%s:", (const char *)cur_loc->ptr);
if (cur_loc->num) {
error_printf("%d:", cur_loc->num);
}
error_printf(" ");
break;
default:
error_printf("%s", sep);
}
}
bool enable_timestamp_msg;
/*
* Print an error message to current monitor if we have one, else to stderr.
* Format arguments like sprintf(). The result should not contain
* newlines.
* Prepend the current location and append a newline.
* It's wrong to call this in a QMP monitor. Use qerror_report() there.
*/
void error_report(const char *fmt, ...)
{
va_list ap;
GTimeVal tv;
gchar *timestr;
if (enable_timestamp_msg) {
g_get_current_time(&tv);
timestr = g_time_val_to_iso8601(&tv);
error_printf("%s ", timestr);
g_free(timestr);
}
error_print_loc();
va_start(ap, fmt);
error_vprintf(fmt, ap);
va_end(ap);
error_printf("\n");
}