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This patch adds a tracing backend which sends output using syslog(). The syslog backend is limited to POSIX compliant systems. openlog() is called with facility set to LOG_DAEMON, with the LOG_PID option. Trace events are logged at level LOG_INFO. Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Message-id: 1470318254-29989-1-git-send-email-paul.durrant@citrix.com Cc: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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#!/usr/bin/env python | ||
# -*- coding: utf-8 -*- | ||
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""" | ||
Syslog built-in backend. | ||
""" | ||
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__author__ = "Paul Durrant <paul.durrant@citrix.com>" | ||
__copyright__ = "Copyright 2016, Citrix Systems Inc." | ||
__license__ = "GPL version 2 or (at your option) any later version" | ||
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__maintainer__ = "Stefan Hajnoczi" | ||
__email__ = "stefanha@redhat.com" | ||
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from tracetool import out | ||
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PUBLIC = True | ||
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def generate_h_begin(events): | ||
out('#include <syslog.h>', | ||
'#include "trace/control.h"', | ||
'') | ||
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def generate_h(event): | ||
argnames = ", ".join(event.args.names()) | ||
if len(event.args) > 0: | ||
argnames = ", " + argnames | ||
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if "vcpu" in event.properties: | ||
# already checked on the generic format code | ||
cond = "true" | ||
else: | ||
cond = "trace_event_get_state(%s)" % ("TRACE_" + event.name.upper()) | ||
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out(' if (%(cond)s) {', | ||
' syslog(LOG_INFO, "%(name)s " %(fmt)s %(argnames)s);', | ||
' }', | ||
cond=cond, | ||
name=event.name, | ||
fmt=event.fmt.rstrip("\n"), | ||
argnames=argnames) |
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