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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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31
scripts/tracetool/format/tcg_h.py
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@@ -13,7 +13,18 @@ __maintainer__ = "Stefan Hajnoczi"
__email__ = "stefanha@linux.vnet.ibm.com"
from tracetool import out
from tracetool import out, Arguments
import tracetool.vcpu
def vcpu_transform_args(args):
assert len(args) == 1
return Arguments([
args,
# NOTE: this name must be kept in sync with the one in "tcg_h"
# NOTE: Current helper code uses TCGv_env (CPUArchState*)
("TCGv_env", "__tcg_" + args.names()[0]),
])
def generate(events, backend):
@@ -35,21 +46,21 @@ def generate(events, backend):
if "tcg-trans" not in e.properties:
continue
# get the original event definition
e = e.original
out('static inline void %(name_tcg)s(%(args)s)',
'{',
name_tcg=e.api(e.QEMU_TRACE_TCG),
args=e.args)
name_tcg=e.original.api(e.QEMU_TRACE_TCG),
args=tracetool.vcpu.transform_args("tcg_h", e.original))
if "disable" not in e.properties:
args_trans = e.original.event_trans.args
args_exec = tracetool.vcpu.transform_args(
"tcg_helper_c", e.original.event_exec, "wrapper")
out(' %(name_trans)s(%(argnames_trans)s);',
' gen_helper_%(name_exec)s(%(argnames_exec)s);',
name_trans=e.event_trans.api(e.QEMU_TRACE),
name_exec=e.event_exec.api(e.QEMU_TRACE),
argnames_trans=", ".join(e.event_trans.args.names()),
argnames_exec=", ".join(e.event_exec.args.names()))
name_trans=e.original.event_trans.api(e.QEMU_TRACE),
name_exec=e.original.event_exec.api(e.QEMU_TRACE),
argnames_trans=", ".join(args_trans.names()),
argnames_exec=", ".join(args_exec.names()))
out('}')