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trace: Add 'vcpu' event property to trace guest vCPU

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This property identifies events that trace vCPU-specific information.

It adds a "CPUState*" argument to events with the property, identifying
the vCPU raising the event. TCG translation events also have a
"TCGv_env" implicit argument that is later used as the "CPUState*"
argument at execution time.

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Message-id: 145641861797.30295.6991314023181842105.stgit@localhost
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Lluís Vilanova 2016-02-25 17:43:38 +01:00 • committed by Stefan Hajnoczi
parent b23197f9cf
commit 3d211d9f4d
11 changed files with 189 additions and 32 deletions
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45
scripts/tracetool/format/tcg_helper_c.py
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@ -6,15 +6,38 @@ Generate trace/generated-helpers.c.
"""
__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
__copyright__ = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
__copyright__ = "Copyright 2012-2016, Lluís Vilanova <vilanova@ac.upc.edu>"
__license__ = "GPL version 2 or (at your option) any later version"
__maintainer__ = "Stefan Hajnoczi"
__email__ = "stefanha@linux.vnet.ibm.com"
from tracetool import out
from tracetool import Arguments, out
from tracetool.transform import *
import tracetool.vcpu
def vcpu_transform_args(args, mode):
assert len(args) == 1
# NOTE: this name must be kept in sync with the one in "tcg_h"
args = Arguments([(args.types()[0], "__tcg_" + args.names()[0])])
if mode == "code":
return Arguments([
# Does cast from helper requirements to tracing types
("CPUState *", "ENV_GET_CPU(%s)" % args.names()[0]),
])
else:
args = Arguments([
# NOTE: Current helper code uses TCGv_env (CPUArchState*)
("CPUArchState *", args.names()[0]),
])
if mode == "header":
return args
elif mode == "wrapper":
return args.transform(HOST_2_TCG)
else:
assert False
def generate(events, backend):
@ -34,18 +57,18 @@ def generate(events, backend):
if "tcg-exec" not in e.properties:
continue
# tracetool.generate always transforms types to host
e_args = e.original.args
e_args_api = tracetool.vcpu.transform_args(
"tcg_helper_c", e.original, "header").transform(
HOST_2_TCG_COMPAT, TCG_2_TCG_HELPER_DEF)
e_args_call = tracetool.vcpu.transform_args(
"tcg_helper_c", e, "code")
values = ["(%s)%s" % (t, n)
for t, n in e.args.transform(TCG_2_TCG_HELPER_DEF)]
out('void %(name_tcg)s(%(args)s)',
out('void %(name_tcg)s(%(args_api)s)',
'{',
' %(name)s(%(values)s);',
' %(name)s(%(args_call)s);',
'}',
name_tcg="helper_%s_proxy" % e.api(),
name=e.api(),
args=e_args.transform(HOST_2_TCG_COMPAT, TCG_2_TCG_HELPER_DEF),
values=", ".join(values),
args_api=e_args_api,
args_call=", ".join(e_args_call.casted()),
)