qemu

FORK: QEMU emulator
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h.py (2904B)

      1 # -*- coding: utf-8 -*-
      2 
      3 """
      4 trace/generated-tracers.h
      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 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())