scripts/tracetool/format/d.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 """
   5 trace/generated-tracers.dtrace (DTrace only).
   6 """
   7
   8 __author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
   9 __copyright__  = "Copyright 2012-2014, 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 # Reserved keywords from
  20 # https://wikis.oracle.com/display/DTrace/Types,+Operators+and+Expressions
  21 RESERVED_WORDS = (
  22     'auto', 'goto', 'sizeof', 'break', 'if', 'static', 'case', 'import',
  23     'string', 'char', 'inline', 'stringof', 'const', 'int', 'struct',
  24     'continue', 'long', 'switch', 'counter', 'offsetof', 'this',
  25     'default', 'probe', 'translator', 'do', 'provider', 'typedef',
  26     'double', 'register', 'union', 'else', 'restrict', 'unsigned',
  27     'enum', 'return', 'void', 'extern', 'self', 'volatile', 'float',
  28     'short', 'while', 'for', 'signed', 'xlate',
  29 )
  30
  31
  32 def generate(events, backend, group):
  33     events = [e for e in events
  34               if "disable" not in e.properties]
  35
  36     # SystemTap's dtrace(1) warns about empty "provider qemu {}" but is happy
  37     # with an empty file.  Avoid the warning.
  38     if not events:
  39         return
  40
  41     out('/* This file is autogenerated by tracetool, do not edit. */'
  42         '',
  43         'provider qemu {')
  44
  45     for e in events:
  46         args = []
  47         for type_, name in e.args:
  48             if name in RESERVED_WORDS:
  49                 name += '_'
  50             args.append(type_ + ' ' + name)
  51
  52         # Define prototype for probe arguments
  53         out('',
  54             'probe %(name)s(%(args)s);',
  55             name=e.name,
  56             args=','.join(args))
  57
  58     out('',
  59         '};')