scripts/tracetool/backend/stderr.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 """
   5 Stderr built-in backend.
   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 PUBLIC = True
  20
  21
  22 def generate_h_begin(events):
  23     out('#include <stdio.h>',
  24         '#include <sys/time.h>',
  25         '#include <sys/types.h>',
  26         '#include <unistd.h>',
  27         '#include "trace/control.h"',
  28         '')
  29
  30
  31 def generate_h(event):
  32     argnames = ", ".join(event.args.names())
  33     if len(event.args) > 0:
  34         argnames = ", " + argnames
  35
  36     out('    if (trace_event_get_state(%(event_id)s)) {',
  37         '        struct timeval _now;',
  38         '        gettimeofday(&_now, NULL);',
  39         '        fprintf(stderr, "%%d@%%zd.%%06zd:%(name)s " %(fmt)s "\\n",',
  40         '                        getpid(),',
  41         '                        (size_t)_now.tv_sec, (size_t)_now.tv_usec',
  42         '                        %(argnames)s);',
  43         '    }',
  44         event_id="TRACE_" + event.name.upper(),
  45         name=event.name,
  46         fmt=event.fmt.rstrip("\n"),
  47         argnames=argnames)