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trace: [tcg] Generate TCG tracing routines

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Generate header "trace/generated-tcg-tracers.h" with the necessary routines for
tracing events in guest code:

* trace_${event}_tcg

  Convenience wrapper that calls the translation-time tracer
  'trace_${event}_trans', and calls 'gen_helper_trace_${event}_exec to
  generate the TCG code to later trace the event at execution time.

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Lluís Vilanova 2014-05-30 14:12:13 +02:00 committed by Stefan Hajnoczi
parent 76b53aa324
commit 465830fbd9
5 changed files with 76 additions and 0 deletions
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1
.gitignore vendored
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@ -14,6 +14,7 @@
/trace/generated-helpers-wrappers.h
/trace/generated-helpers.h
/trace/generated-helpers.c
/trace/generated-tcg-tracers.h
/trace/generated-ust-provider.h
/trace/generated-ust.c
/libcacard/trace/generated-tracers.c

2
Makefile
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@ -57,6 +57,8 @@ GENERATED_HEADERS += trace/generated-tracers-dtrace.h
endif
GENERATED_SOURCES += trace/generated-tracers.c
GENERATED_HEADERS += trace/generated-tcg-tracers.h
GENERATED_HEADERS += trace/generated-helpers-wrappers.h
GENERATED_HEADERS += trace/generated-helpers.h
GENERATED_SOURCES += trace/generated-helpers.c

7
include/trace-tcg.h Normal file
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@ -0,0 +1,7 @@
#ifndef TRACE_TCG_H
#define TRACE_TCG_H
#include "trace/generated-tcg-tracers.h"
#include "trace/generated-events.h"
#endif /* TRACE_TCG_H */

57
scripts/tracetool/format/tcg_h.py Normal file
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@ -0,0 +1,57 @@
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Generate .h file for TCG code generation.
"""
__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
__copyright__ = "Copyright 2012-2014, 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
def generate(events, backend):
out('/* This file is autogenerated by tracetool, do not edit. */',
'/* You must include this file after the inclusion of helper.h */',
'',
'#ifndef TRACE__GENERATED_TCG_TRACERS_H',
'#define TRACE__GENERATED_TCG_TRACERS_H',
'',
'#include <stdint.h>',
'',
'#include "trace.h"',
'#include "exec/helper-proto.h"',
'',
)
for e in events:
# just keep one of them
if "tcg-trans" not in e.properties:
continue
# get the original event definition
e = e.original.original
out('static inline void %(name_tcg)s(%(args)s)',
'{',
name_tcg=e.api(e.QEMU_TRACE_TCG),
args=e.args)
if "disable" not in e.properties:
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()))
out('}')
out('',
'#endif /* TRACE__GENERATED_TCG_TRACERS_H */')

9
trace/Makefile.objs
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@ -128,6 +128,15 @@ $(obj)/generated-helpers.o: $(obj)/generated-helpers.c
target-obj-y += generated-helpers.o
$(obj)/generated-tcg-tracers.h: $(obj)/generated-tcg-tracers.h-timestamp
$(obj)/generated-tcg-tracers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
$(call quiet-command,$(TRACETOOL) \
--format=tcg-h \
--backend=$(TRACE_BACKENDS) \
< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
@cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@)
######################################################################
# Backend code