scripts/tracetool/backend/log.py

   1 # -*- coding: utf-8 -*-
   2
   3 """
   4 Stderr built-in backend.
   5 """
   6
   7 __author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
   8 __copyright__  = "Copyright 2012-2017, 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@redhat.com"
  13
  14
  15 from tracetool import out
  16
  17
  18 PUBLIC = True
  19
  20
  21 def generate_h_begin(events, group):
  22     out('#include "qemu/log-for-trace.h"',
  23         '')
  24
  25
  26 def generate_h(event, group):
  27     argnames = ", ".join(event.args.names())
  28     if len(event.args) > 0:
  29         argnames = ", " + argnames
  30
  31     if "vcpu" in event.properties:
  32         # already checked on the generic format code
  33         cond = "true"
  34     else:
  35         cond = "trace_event_get_state(%s)" % ("TRACE_" + event.name.upper())
  36
  37     out('    if (%(cond)s && qemu_loglevel_mask(LOG_TRACE)) {',
  38         '        struct timeval _now;',
  39         '        gettimeofday(&_now, NULL);',
  40         '        qemu_log("%%d@%%zu.%%06zu:%(name)s " %(fmt)s "\\n",',
  41         '                 qemu_get_thread_id(),',
  42         '                 (size_t)_now.tv_sec, (size_t)_now.tv_usec',
  43         '                 %(argnames)s);',
  44         '    }',
  45         cond=cond,
  46         name=event.name,
  47         fmt=event.fmt.rstrip("\n"),
  48         argnames=argnames)
  49
  50
  51 def generate_h_backend_dstate(event, group):
  52     out('    trace_event_get_state_dynamic_by_id(%(event_id)s) || \\',
  53         event_id="TRACE_" + event.name.upper())