scripts/tracetool/backend/ust.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 """
   5 LTTng User Space Tracing backend.
   6 """
   7
   8 __author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
   9 __copyright__  = "Copyright 2012, Lluís Vilanova <vilanova@ac.upc.edu>"
  10 __license__    = "GPL version 2 or (at your option) any later version"
  11
  12 __maintainer__ = "Stefan Hajnoczi"
  13 __email__      = "stefanha@linux.vnet.ibm.com"
  14
  15
  16 from tracetool import out
  17
  18
  19 def c(events):
  20     out('#include <ust/marker.h>',
  21         '#undef mutex_lock',
  22         '#undef mutex_unlock',
  23         '#undef inline',
  24         '#undef wmb',
  25         '#include "trace.h"')
  26
  27     for e in events:
  28         argnames = ", ".join(e.args.names())
  29         if len(e.args) > 0:
  30             argnames = ', ' + argnames
  31
  32             out('DEFINE_TRACE(ust_%(name)s);',
  33                 '',
  34                 'static void ust_%(name)s_probe(%(args)s)',
  35                 '{',
  36                 '    trace_mark(ust, %(name)s, %(fmt)s%(argnames)s);',
  37                 '}',
  38                 name = e.name,
  39                 args = e.args,
  40                 fmt = e.fmt,
  41                 argnames = argnames,
  42                 )
  43
  44         else:
  45             out('DEFINE_TRACE(ust_%(name)s);',
  46                 '',
  47                 'static void ust_%(name)s_probe(%(args)s)',
  48                 '{',
  49                 '    trace_mark(ust, %(name)s, UST_MARKER_NOARGS);',
  50                 '}',
  51                 name = e.name,
  52                 args = e.args,
  53                 )
  54
  55     # register probes
  56     out('',
  57         'static void __attribute__((constructor)) trace_init(void)',
  58         '{')
  59
  60     for e in events:
  61         out('    register_trace_ust_%(name)s(ust_%(name)s_probe);',
  62             name = e.name,
  63             )
  64
  65     out('}')
  66
  67
  68 def h(events):
  69     out('#include <ust/tracepoint.h>',
  70         '#undef mutex_lock',
  71         '#undef mutex_unlock',
  72         '#undef inline',
  73         '#undef wmb')
  74
  75     for e in events:
  76         if len(e.args) > 0:
  77             out('DECLARE_TRACE(ust_%(name)s, TP_PROTO(%(args)s), TP_ARGS(%(argnames)s));',
  78                 '#define trace_%(name)s trace_ust_%(name)s',
  79                 name = e.name,
  80                 args = e.args,
  81                 argnames = ", ".join(e.args.names()),
  82                 )
  83
  84         else:
  85             out('_DECLARE_TRACEPOINT_NOARGS(ust_%(name)s);',
  86                 '#define trace_%(name)s trace_ust_%(name)s',
  87                 name = e.name,
  88                 )
  89
  90     out()