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

Browse source 
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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126
scripts/tracetool/backend/simple.py
View file

@ -26,76 +26,74 @@ def is_string(arg):
else:
return False
def c(events):
def generate_h_begin(events):
for event in events:
out('void _simple_%(api)s(%(args)s);',
api=event.api(),
args=event.args)
out('')
def generate_h(event):
out(' _simple_%(api)s(%(args)s);',
api=event.api(),
args=", ".join(event.args.names()))
def generate_c_begin(events):
out('#include "trace.h"',
'#include "trace/control.h"',
'#include "trace/simple.h"',
'')
def generate_c(event):
out('void _simple_%(api)s(%(args)s)',
'{',
' TraceBufferRecord rec;',
api=event.api(),
args=event.args)
sizes = []
for type_, name in event.args:
if is_string(type_):
out(' size_t arg%(name)s_len = %(name)s ? MIN(strlen(%(name)s), MAX_TRACE_STRLEN) : 0;',
name=name)
strsizeinfo = "4 + arg%s_len" % name
sizes.append(strsizeinfo)
else:
sizes.append("8")
sizestr = " + ".join(sizes)
if len(event.args) == 0:
sizestr = '0'
out('',
' if (!trace_event_get_state(%(event_id)s)) {',
' return;',
' }',
'',
)
' if (trace_record_start(&rec, %(event_id)s, %(size_str)s)) {',
' return; /* Trace Buffer Full, Event Dropped ! */',
' }',
event_id='TRACE_' + event.name.upper(),
size_str=sizestr)
for num, event in enumerate(events):
out('void %(api)s(%(args)s)',
'{',
' TraceBufferRecord rec;',
api = event.api(),
args = event.args,
)
sizes = []
if len(event.args) > 0:
for type_, name in event.args:
# string
if is_string(type_):
out(' size_t arg%(name)s_len = %(name)s ? MIN(strlen(%(name)s), MAX_TRACE_STRLEN) : 0;',
name = name,
)
strsizeinfo = "4 + arg%s_len" % name
sizes.append(strsizeinfo)
out(' trace_record_write_str(&rec, %(name)s, arg%(name)s_len);',
name=name)
# pointer var (not string)
elif type_.endswith('*'):
out(' trace_record_write_u64(&rec, (uintptr_t)(uint64_t *)%(name)s);',
name=name)
# primitive data type
else:
sizes.append("8")
sizestr = " + ".join(sizes)
if len(event.args) == 0:
sizestr = '0'
out(' trace_record_write_u64(&rec, (uint64_t)%(name)s);',
name=name)
out('',
' TraceEvent *eventp = trace_event_id(%(event_enum)s);',
' bool _state = trace_event_get_state_dynamic(eventp);',
' if (!_state) {',
' return;',
' }',
'',
' if (trace_record_start(&rec, %(event_id)s, %(size_str)s)) {',
' return; /* Trace Buffer Full, Event Dropped ! */',
' }',
event_enum = 'TRACE_' + event.name.upper(),
event_id = num,
size_str = sizestr,
)
if len(event.args) > 0:
for type_, name in event.args:
# string
if is_string(type_):
out(' trace_record_write_str(&rec, %(name)s, arg%(name)s_len);',
name = name,
)
# pointer var (not string)
elif type_.endswith('*'):
out(' trace_record_write_u64(&rec, (uintptr_t)(uint64_t *)%(name)s);',
name = name,
)
# primitive data type
else:
out(' trace_record_write_u64(&rec, (uint64_t)%(name)s);',
name = name,
)
out(' trace_record_finish(&rec);',
'}',
'')
def h(events):
for event in events:
out('void %(api)s(%(args)s);',
api = event.api(),
args = event.args,
)
out(' trace_record_finish(&rec);',
'}',
'')