scripts/tracetool/format/h.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 """
   5 trace/generated-tracers.h
   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 def generate(events, backend, group):
  20     out('/* This file is autogenerated by tracetool, do not edit. */',
  21         '',
  22         '#ifndef TRACE_%s_GENERATED_TRACERS_H' % group.upper(),
  23         '#define TRACE_%s_GENERATED_TRACERS_H' % group.upper(),
  24         '',
  25         '#include "qemu-common.h"',
  26         '#include "trace/control.h"',
  27         '')
  28
  29     for e in events:
  30         out('extern TraceEvent %(event)s;',
  31             event = e.api(e.QEMU_EVENT))
  32
  33     for e in events:
  34         out('extern uint16_t %s;' % e.api(e.QEMU_DSTATE))
  35
  36     # static state
  37     for e in events:
  38         if 'disable' in e.properties:
  39             enabled = 0
  40         else:
  41             enabled = 1
  42         if "tcg-exec" in e.properties:
  43             # a single define for the two "sub-events"
  44             out('#define TRACE_%(name)s_ENABLED %(enabled)d',
  45                 name=e.original.name.upper(),
  46                 enabled=enabled)
  47         out('#define TRACE_%s_ENABLED %d' % (e.name.upper(), enabled))
  48
  49     backend.generate_begin(events, group)
  50
  51     for e in events:
  52         # tracer-specific dstate
  53         out('',
  54             '#define %(api)s() ( \\',
  55             api=e.api(e.QEMU_BACKEND_DSTATE))
  56
  57         if "disable" not in e.properties:
  58             backend.generate_backend_dstate(e, group)
  59
  60         out('    false)')
  61
  62         # tracer without checks
  63         out('',
  64             'static inline void %(api)s(%(args)s)',
  65             '{',
  66             api=e.api(e.QEMU_TRACE_NOCHECK),
  67             args=e.args)
  68
  69         if "disable" not in e.properties:
  70             backend.generate(e, group)
  71
  72         out('}')
  73
  74         # tracer wrapper with checks (per-vCPU tracing)
  75         if "vcpu" in e.properties:
  76             trace_cpu = next(iter(e.args))[1]
  77             cond = "trace_event_get_vcpu_state(%(cpu)s,"\
  78                    " TRACE_%(id)s)"\
  79                    % dict(
  80                        cpu=trace_cpu,
  81                        id=e.name.upper())
  82         else:
  83             cond = "true"
  84
  85         out('',
  86             'static inline void %(api)s(%(args)s)',
  87             '{',
  88             '    if (%(cond)s) {',
  89             '        %(api_nocheck)s(%(names)s);',
  90             '    }',
  91             '}',
  92             api=e.api(),
  93             api_nocheck=e.api(e.QEMU_TRACE_NOCHECK),
  94             args=e.args,
  95             names=", ".join(e.args.names()),
  96             cond=cond)
  97
  98     backend.generate_end(events, group)
  99
 100     out('#endif /* TRACE_%s_GENERATED_TRACERS_H */' % group.upper())