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 PUBLIC = True
  20
  21 def c(events):
  22     pass
  23
  24
  25 def h(events):
  26     out('#include <lttng/tracepoint.h>',
  27         '#include "trace/generated-ust-provider.h"',
  28         '')
  29     for e in events:
  30         argnames = ", ".join(e.args.names())
  31         if len(e.args) > 0:
  32             argnames = ", " + argnames
  33
  34         out('static inline void trace_%(name)s(%(args)s)',
  35             '{',
  36             '    tracepoint(qemu, %(name)s%(tp_args)s);',
  37             '}',
  38             '',
  39             name = e.name,
  40             args = e.args,
  41             tp_args = argnames,
  42             )
  43
  44 def ust_events_c(events):
  45     pass
  46
  47 def ust_events_h(events):
  48     for e in events:
  49         if len(e.args) > 0:
  50             out('TRACEPOINT_EVENT(',
  51                 '   qemu,',
  52                 '   %(name)s,',
  53                 '   TP_ARGS(%(args)s),',
  54                 '   TP_FIELDS(',
  55                 name = e.name,
  56                 args = ", ".join(", ".join(i) for i in e.args),
  57                 )
  58
  59             for t,n in e.args:
  60                 if ('int' in t) or ('long' in t) or ('unsigned' in t) or ('size_t' in t):
  61                     out('       ctf_integer(' + t + ', ' + n + ', ' + n + ')')
  62                 elif ('double' in t) or ('float' in t):
  63                     out('       ctf_float(' + t + ', ' + n + ', ' + n + ')')
  64                 elif ('char *' in t) or ('char*' in t):
  65                     out('       ctf_string(' + n + ', ' + n + ')')
  66                 elif ('void *' in t) or ('void*' in t):
  67                     out('       ctf_integer_hex(unsigned long, ' + n + ', ' + n + ')')
  68
  69             out('   )',
  70                 ')',
  71                 '')
  72
  73         else:
  74             out('TRACEPOINT_EVENT(',
  75                 '   qemu,',
  76                 '   %(name)s,',
  77                 '   TP_ARGS(void),',
  78                 '   TP_FIELDS()',
  79                 ')',
  80                 '',
  81                 name = e.name,
  82                 )