qemu-patch-raspberry4/scripts/tracetool/backend/syslog.py
Daniel P. Berrange 80dd5c4918 trace: introduce a formal group name for trace events
The declarations in the generated-tracers.h file are
assuming there's only ever going to be one instance
of this header, as they are not namespaced. When we
have one header per event group, if a single source
file needs to include multiple sets of trace events,
the symbols will all clash.

This change thus introduces a '--group NAME' arg to the
'tracetool' program. This will cause all the symbols in
the generated header files to be given a unique namespace.

If no group is given, the group name 'common' is used,
which is suitable for the current usage where there is
only one global trace-events file used for code generation.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Message-id: 1475588159-30598-21-git-send-email-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2016-10-12 09:54:53 +02:00

45 lines
1 KiB
Python

#!/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, group):
out('#include <syslog.h>',
'')
def generate_h(event, group):
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)