scripts/tracetool/format/d.py

   1 # -*- coding: utf-8 -*-
   2
   3 """
   4 trace/generated-tracers.dtrace (DTrace only).
   5 """
   6
   7 __author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
   8 __copyright__  = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
   9 __license__    = "GPL version 2 or (at your option) any later version"
  10
  11 __maintainer__ = "Stefan Hajnoczi"
  12 __email__      = "stefanha@linux.vnet.ibm.com"
  13
  14
  15 from tracetool import out
  16
  17
  18 # Reserved keywords from
  19 # https://wikis.oracle.com/display/DTrace/Types,+Operators+and+Expressions
  20 RESERVED_WORDS = (
  21     'auto', 'goto', 'sizeof', 'break', 'if', 'static', 'case', 'import',
  22     'string', 'char', 'inline', 'stringof', 'const', 'int', 'struct',
  23     'continue', 'long', 'switch', 'counter', 'offsetof', 'this',
  24     'default', 'probe', 'translator', 'do', 'provider', 'typedef',
  25     'double', 'register', 'union', 'else', 'restrict', 'unsigned',
  26     'enum', 'return', 'void', 'extern', 'self', 'volatile', 'float',
  27     'short', 'while', 'for', 'signed', 'xlate',
  28 )
  29
  30
  31 def generate(events, backend, group):
  32     events = [e for e in events
  33               if "disable" not in e.properties]
  34
  35     # SystemTap's dtrace(1) warns about empty "provider qemu {}" but is happy
  36     # with an empty file.  Avoid the warning.
  37     if not events:
  38         return
  39
  40     out('/* This file is autogenerated by tracetool, do not edit. */'
  41         '',
  42         'provider qemu {')
  43
  44     for e in events:
  45         args = []
  46         for type_, name in e.args:
  47             if name in RESERVED_WORDS:
  48                 name += '_'
  49             args.append(type_ + ' ' + name)
  50
  51         # Define prototype for probe arguments
  52         out('',
  53             'probe %(name)s(%(args)s);',
  54             name=e.name,
  55             args=','.join(args))
  56
  57     out('',
  58         '};')