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# SPDX-License-Identifier: GPL-2.0-or-later
"""
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, expand_format_string
PUBLIC = True
CHECK_TRACE_EVENT_GET_STATE = 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('#line %(event_lineno)d "%(event_filename)s"',
' ftrace_write("%(name)s " %(fmt)s "\\n" %(argnames)s);',
'#line %(out_next_lineno)d "%(out_filename)s"',
name=event.name,
args=event.args,
event_lineno=event.lineno,
event_filename=event.filename,
fmt=event.fmt.rstrip("\n"),
argnames=argnames)
def generate_h_backend_dstate(event, group):
out(' trace_event_get_state_dynamic_by_id(%(event_id)s) || \\',
event_id="TRACE_" + event.name.upper())
def generate_rs(event, group):
out(' let format_string = c"%(fmt)s";',
' unsafe {bindings::ftrace_write(format_string.as_ptr() as *const c_char, %(args)s);}',
fmt=expand_format_string(event.fmt),
args=event.args.rust_call_varargs())
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