scripts/tracetool/backend/dtrace.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 """
   5 DTrace/SystemTAP backend.
   6 """
   7
   8 __author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
   9 __copyright__  = "Copyright 2012-2017, 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
  22 PROBEPREFIX = None
  23
  24 def probeprefix():
  25     if PROBEPREFIX is None:
  26         raise ValueError("you must set PROBEPREFIX")
  27     return PROBEPREFIX
  28
  29
  30 BINARY = None
  31
  32 def binary():
  33     if BINARY is None:
  34         raise ValueError("you must set BINARY")
  35     return BINARY
  36
  37
  38 def generate_h_begin(events, group):
  39     if group == "root":
  40         header = "trace-dtrace-root.h"
  41     else:
  42         header = "trace-dtrace.h"
  43
  44     out('#include "%s"' % header,
  45         '')
  46
  47     # SystemTap defines <provider>_<name>_ENABLED() but other DTrace
  48     # implementations might not.
  49     for e in events:
  50         out('#ifndef QEMU_%(uppername)s_ENABLED',
  51             '#define QEMU_%(uppername)s_ENABLED() true',
  52             '#endif',
  53             uppername=e.name.upper())
  54
  55 def generate_h(event, group):
  56     out('    QEMU_%(uppername)s(%(argnames)s);',
  57         uppername=event.name.upper(),
  58         argnames=", ".join(event.args.names()))
  59
  60
  61 def generate_h_backend_dstate(event, group):
  62     out('    QEMU_%(uppername)s_ENABLED() || \\',
  63         uppername=event.name.upper())