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log: Make glib logging go through QEMU

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This commit adds a error_init() helper which calls
g_log_set_default_handler() so that glib logs (g_log, g_warning, ...)
are handled similarly to other QEMU logs. This means they will get a
timestamp if timestamps are enabled, and they will go through the
HMP monitor if one is configured.

This commit also adds a call to error_init() to the binaries
installed by QEMU. Since error_init() also calls error_set_progname(),
this means that *-linux-user, *-bsd-user and qemu-pr-helper messages
output with error_report, info_report, ... will slightly change: they
will be prefixed by the binary name.

glib debug messages are enabled through G_MESSAGES_DEBUG similarly to
the glib default log handler.

At the moment, this change will mostly impact SPICE logging if your
spice version is >= 0.14.1. With older spice versions, this is not going
to work as expected, but will not have any ill effect, so this call is
not conditional on the SPICE version.

Signed-off-by: Christophe Fergeau <cfergeau@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20190131164614.19209-3-cfergeau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Christophe Fergeau 2019-01-31 17:46:14 +01:00 • committed by Markus Armbruster
parent 99e98d7c9f
commit f5852efa29
9 changed files with 65 additions and 6 deletions
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3
include/qemu/error-report.h
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@ -34,7 +34,6 @@ void error_vprintf(const char *fmt, va_list ap) GCC_FMT_ATTR(1, 0);
void error_printf(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
void error_vprintf_unless_qmp(const char *fmt, va_list ap) GCC_FMT_ATTR(1, 0);
void error_printf_unless_qmp(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
void error_set_progname(const char *argv0);
void error_vreport(const char *fmt, va_list ap) GCC_FMT_ATTR(1, 0);
void warn_vreport(const char *fmt, va_list ap) GCC_FMT_ATTR(1, 0);
@ -49,6 +48,8 @@ bool error_report_once_cond(bool *printed, const char *fmt, ...)
bool warn_report_once_cond(bool *printed, const char *fmt, ...)
GCC_FMT_ATTR(2, 3);
void error_init(const char *argv0);
/*
* Similar to error_report(), except it prints the message just once.
* Return true when it prints, false otherwise.