scripts/tracetool/format/h.py

   1 # -*- coding: utf-8 -*-
   2
   3 """
   4 trace/generated-tracers.h
   5 """
   6
   7 __author__     = "Lluís Vilanova <[email protected]>"
   8 __copyright__  = "Copyright 2012-2017, Lluís Vilanova <[email protected]>"
   9 __license__    = "GPL version 2 or (at your option) any later version"
  10
  11 __maintainer__ = "Stefan Hajnoczi"
  12 __email__      = "[email protected]"
  13
  14
  15 from tracetool import out
  16
  17
  18 def generate(events, backend, group):
  19     if group == "root":
  20         header = "trace/control-vcpu.h"
  21     else:
  22         header = "trace/control.h"
  23
  24     out('/* This file is autogenerated by tracetool, do not edit. */',
  25         '',
  26         '#ifndef TRACE_%s_GENERATED_TRACERS_H' % group.upper(),
  27         '#define TRACE_%s_GENERATED_TRACERS_H' % group.upper(),
  28         '',
  29         '#include "%s"' % header,
  30         '')
  31
  32     for e in events:
  33         out('extern TraceEvent %(event)s;',
  34             event = e.api(e.QEMU_EVENT))
  35
  36     for e in events:
  37         out('extern uint16_t %s;' % e.api(e.QEMU_DSTATE))
  38
  39     # static state
  40     for e in events:
  41         if 'disable' in e.properties:
  42             enabled = 0
  43         else:
  44             enabled = 1
  45         if "tcg-exec" in e.properties:
  46             # a single define for the two "sub-events"
  47             out('#define TRACE_%(name)s_ENABLED %(enabled)d',
  48                 name=e.original.name.upper(),
  49                 enabled=enabled)
  50         out('#define TRACE_%s_ENABLED %d' % (e.name.upper(), enabled))
  51
  52     backend.generate_begin(events, group)
  53
  54     for e in events:
  55         # tracer-specific dstate
  56         out('',
  57             '#define %(api)s() ( \\',
  58             api=e.api(e.QEMU_BACKEND_DSTATE))
  59
  60         if "disable" not in e.properties:
  61             backend.generate_backend_dstate(e, group)
  62
  63         out('    false)')
  64
  65         # tracer without checks
  66         out('',
  67             'static inline void %(api)s(%(args)s)',
  68             '{',
  69             api=e.api(e.QEMU_TRACE_NOCHECK),
  70             args=e.args)
  71
  72         if "disable" not in e.properties:
  73             backend.generate(e, group)
  74
  75         out('}')
  76
  77         # tracer wrapper with checks (per-vCPU tracing)
  78         if "vcpu" in e.properties:
  79             trace_cpu = next(iter(e.args))[1]
  80             cond = "trace_event_get_vcpu_state(%(cpu)s,"\
  81                    " TRACE_%(id)s)"\
  82                    % dict(
  83                        cpu=trace_cpu,
  84                        id=e.name.upper())
  85         else:
  86             cond = "true"
  87
  88         out('',
  89             'static inline void %(api)s(%(args)s)',
  90             '{',
  91             '    if (%(cond)s) {',
  92             '        %(api_nocheck)s(%(names)s);',
  93             '    }',
  94             '}',
  95             api=e.api(),
  96             api_nocheck=e.api(e.QEMU_TRACE_NOCHECK),
  97             args=e.args,
  98             names=", ".join(e.args.names()),
  99             cond=cond)
 100
 101     backend.generate_end(events, group)
 102
 103     out('#endif /* TRACE_%s_GENERATED_TRACERS_H */' % group.upper())