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authorPaul Durrant <paul.durrant@citrix.com>2016-08-04 14:44:14 +0100
committerStefan Hajnoczi <stefanha@redhat.com>2016-09-05 13:47:01 -0400
commit0a852417564bc59441dc09509beacf7b49bc1e57 (patch)
treea27b04adbdaa3681d8797dab9097df2aca9464fd /scripts/tracetool
parente87d397e5ef66276ccc49b829527d605ca07d0ad (diff)
trace: add syslog tracing backend
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>
Diffstat (limited to 'scripts/tracetool')
-rw-r--r--scripts/tracetool/backend/syslog.py45
1 files changed, 45 insertions, 0 deletions
diff --git a/scripts/tracetool/backend/syslog.py b/scripts/tracetool/backend/syslog.py
new file mode 100644
index 0000000000..89019bc759
--- /dev/null
+++ b/scripts/tracetool/backend/syslog.py
@@ -0,0 +1,45 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Syslog built-in backend.
+"""
+
+__author__ = "Paul Durrant <paul.durrant@citrix.com>"
+__copyright__ = "Copyright 2016, Citrix Systems Inc."
+__license__ = "GPL version 2 or (at your option) any later version"
+
+__maintainer__ = "Stefan Hajnoczi"
+__email__ = "stefanha@redhat.com"
+
+
+from tracetool import out
+
+
+PUBLIC = True
+
+
+def generate_h_begin(events):
+ out('#include <syslog.h>',
+ '#include "trace/control.h"',
+ '')
+
+
+def generate_h(event):
+ argnames = ", ".join(event.args.names())
+ if len(event.args) > 0:
+ argnames = ", " + argnames
+
+ 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())
+
+ 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)