80dd5c4918
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>
48 lines
1.3 KiB
Python
48 lines
1.3 KiB
Python
#!/usr/bin/env python
|
|
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
Ftrace built-in backend.
|
|
"""
|
|
|
|
__author__ = "Eiichi Tsukata <eiichi.tsukata.xh@hitachi.com>"
|
|
__copyright__ = "Copyright (C) 2013 Hitachi, Ltd."
|
|
__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 "trace/ftrace.h"',
|
|
'')
|
|
|
|
|
|
def generate_h(event, group):
|
|
argnames = ", ".join(event.args.names())
|
|
if len(event.args) > 0:
|
|
argnames = ", " + argnames
|
|
|
|
out(' {',
|
|
' char ftrace_buf[MAX_TRACE_STRLEN];',
|
|
' int unused __attribute__ ((unused));',
|
|
' int trlen;',
|
|
' if (trace_event_get_state(%(event_id)s)) {',
|
|
' trlen = snprintf(ftrace_buf, MAX_TRACE_STRLEN,',
|
|
' "%(name)s " %(fmt)s "\\n" %(argnames)s);',
|
|
' trlen = MIN(trlen, MAX_TRACE_STRLEN - 1);',
|
|
' unused = write(trace_marker_fd, ftrace_buf, trlen);',
|
|
' }',
|
|
' }',
|
|
name=event.name,
|
|
args=event.args,
|
|
event_id="TRACE_" + event.name.upper(),
|
|
fmt=event.fmt.rstrip("\n"),
|
|
argnames=argnames)
|