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trace: [tracetool] Minimize the amount of per-backend code

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Backends now only contain the essential backend-specific code, and most of the work is moved to frontend code.

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Lluís Vilanova 2014-02-23 20:37:40 +01:00 • committed by Stefan Hajnoczi
parent ef0bd3bba6
commit 1dad2ce973
19 changed files with 303 additions and 395 deletions
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52
scripts/tracetool/backend/ftrace.py
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@ -19,36 +19,30 @@ from tracetool import out
PUBLIC = True
def c(events):
pass
def h(events):
def generate_h_begin(events):
out('#include "trace/ftrace.h"',
'#include "trace/control.h"',
'',
)
'')
for e in events:
argnames = ", ".join(e.args.names())
if len(e.args) > 0:
argnames = ", " + argnames
out('static inline void trace_%(name)s(%(args)s)',
'{',
' char ftrace_buf[MAX_TRACE_STRLEN];',
' int unused __attribute__ ((unused));',
' int trlen;',
' bool _state = trace_event_get_state(%(event_id)s);',
' if (_state) {',
' 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 = e.name,
args = e.args,
event_id = "TRACE_" + e.name.upper(),
fmt = e.fmt.rstrip("\n"),
argnames = argnames,
)
def generate_h(event):
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)