scripts/tracetool/format/tcg_helper_c.py

   1 # -*- coding: utf-8 -*-
   2
   3 """
   4 Generate trace/generated-helpers.c.
   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 Arguments, out
  16 from tracetool.transform import *
  17 import tracetool.vcpu
  18
  19
  20 def vcpu_transform_args(args, mode):
  21     assert len(args) == 1
  22     # NOTE: this name must be kept in sync with the one in "tcg_h"
  23     args = Arguments([(args.types()[0], "__tcg_" + args.names()[0])])
  24     if mode == "code":
  25         return Arguments([
  26             # Does cast from helper requirements to tracing types
  27             ("CPUState *", "env_cpu(%s)" % args.names()[0]),
  28         ])
  29     else:
  30         args = Arguments([
  31             # NOTE: Current helper code uses TCGv_env (CPUArchState*)
  32             ("CPUArchState *", args.names()[0]),
  33         ])
  34         if mode == "header":
  35             return args
  36         elif mode == "wrapper":
  37             return args.transform(HOST_2_TCG)
  38         else:
  39             assert False
  40
  41
  42 def generate(events, backend, group):
  43     if group == "root":
  44         header = "trace/trace-root.h"
  45     else:
  46         header = "trace.h"
  47
  48     events = [e for e in events
  49               if "disable" not in e.properties]
  50
  51     out('/* This file is autogenerated by tracetool, do not edit. */',
  52         '',
  53         '#include "qemu/osdep.h"',
  54         '#include "cpu.h"',
  55         '#include "exec/helper-proto.h"',
  56         '#include "%s"' % header,
  57         '',
  58         )
  59
  60     for e in events:
  61         if "tcg-exec" not in e.properties:
  62             continue
  63
  64         e_args_api = tracetool.vcpu.transform_args(
  65             "tcg_helper_c", e.original, "header").transform(
  66                 HOST_2_TCG_COMPAT, TCG_2_TCG_HELPER_DEF)
  67         e_args_call = tracetool.vcpu.transform_args(
  68             "tcg_helper_c", e, "code")
  69
  70         out('void %(name_tcg)s(%(args_api)s)',
  71             '{',
  72             # NOTE: the check was already performed at TCG-generation time
  73             '    %(name)s(%(args_call)s);',
  74             '}',
  75             name_tcg="helper_%s_proxy" % e.api(),
  76             name=e.api(e.QEMU_TRACE_NOCHECK),
  77             args_api=e_args_api,
  78             args_call=", ".join(e_args_call.casted()),
  79             )