864a2178d4
If an event is dynamically disabled, the TCG code that calls the execution-time tracer is not generated. Removes the overheads of execution-time tracers for dynamically disabled events. As a bonus, also avoids checking the event state when the execution-time tracer is called from TCG-generated code (since otherwise TCG would simply not call it). Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Emilio G. Cota <cota@braap.org> Message-id: 149915799921.6295.13067154430923434035.stgit@frigg.lan Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
82 lines
2.4 KiB
Python
82 lines
2.4 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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Generate trace/generated-helpers.c.
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"""
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__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
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__copyright__ = "Copyright 2012-2017, Lluís Vilanova <vilanova@ac.upc.edu>"
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__license__ = "GPL version 2 or (at your option) any later version"
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__maintainer__ = "Stefan Hajnoczi"
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__email__ = "stefanha@linux.vnet.ibm.com"
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from tracetool import Arguments, out
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from tracetool.transform import *
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import tracetool.vcpu
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def vcpu_transform_args(args, mode):
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assert len(args) == 1
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# NOTE: this name must be kept in sync with the one in "tcg_h"
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args = Arguments([(args.types()[0], "__tcg_" + args.names()[0])])
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if mode == "code":
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return Arguments([
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# Does cast from helper requirements to tracing types
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("CPUState *", "ENV_GET_CPU(%s)" % args.names()[0]),
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])
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else:
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args = Arguments([
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# NOTE: Current helper code uses TCGv_env (CPUArchState*)
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("CPUArchState *", args.names()[0]),
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])
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if mode == "header":
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return args
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elif mode == "wrapper":
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return args.transform(HOST_2_TCG)
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else:
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assert False
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def generate(events, backend, group):
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if group == "root":
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header = "trace-root.h"
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else:
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header = "trace.h"
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events = [e for e in events
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if "disable" not in e.properties]
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out('/* This file is autogenerated by tracetool, do not edit. */',
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'',
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'#include "qemu/osdep.h"',
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'#include "qemu-common.h"',
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'#include "cpu.h"',
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'#include "exec/helper-proto.h"',
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'#include "%s"' % header,
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'',
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)
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for e in events:
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if "tcg-exec" not in e.properties:
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continue
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e_args_api = tracetool.vcpu.transform_args(
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"tcg_helper_c", e.original, "header").transform(
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HOST_2_TCG_COMPAT, TCG_2_TCG_HELPER_DEF)
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e_args_call = tracetool.vcpu.transform_args(
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"tcg_helper_c", e, "code")
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out('void %(name_tcg)s(%(args_api)s)',
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'{',
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# NOTE: the check was already performed at TCG-generation time
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' %(name)s(%(args_call)s);',
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'}',
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name_tcg="helper_%s_proxy" % e.api(),
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name=e.api(e.QEMU_TRACE_NOCHECK),
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args_api=e_args_api,
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args_call=", ".join(e_args_call.casted()),
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)
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