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trace: [tcg] Define TCG tracing helper routine wrappers

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Generates header "trace/generated-helpers-wrappers.h" with definitions for TCG
helper wrappers.

These wrappers ('gen_helper_trace_${event}_exec_wrapper') transform mixed native
and TCG argument types to TCG types and call the actual TCG helpers
('gen_helper_trace_${event}_exec_proxy').

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 14:12:01 +02:00 committed by Stefan Hajnoczi
parent 341ea69185
commit f4654226d4
4 changed files with 80 additions and 0 deletions
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1
.gitignore vendored
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@ -11,6 +11,7 @@
/trace/generated-tracers.dtrace
/trace/generated-events.h
/trace/generated-events.c
/trace/generated-helpers-wrappers.h
/trace/generated-helpers.h
/trace/generated-helpers.c
/trace/generated-ust-provider.h

1
Makefile
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@ -57,6 +57,7 @@ GENERATED_HEADERS += trace/generated-tracers-dtrace.h
endif
GENERATED_SOURCES += trace/generated-tracers.c
GENERATED_HEADERS += trace/generated-helpers-wrappers.h
GENERATED_HEADERS += trace/generated-helpers.h
GENERATED_SOURCES += trace/generated-helpers.c

70
scripts/tracetool/format/tcg_helper_wrapper_h.py Normal file
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@ -0,0 +1,70 @@
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Generate trace/generated-helpers-wrappers.h.
"""
__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
from tracetool.transform import *
def generate(events, backend):
events = [e for e in events
if "disable" not in e.properties]
out('/* This file is autogenerated by tracetool, do not edit. */',
'',
'#define tcg_temp_new_nop(v) (v)',
'#define tcg_temp_free_nop(v)',
'',
)
for e in events:
if "tcg-exec" not in e.properties:
continue
# tracetool.generate always transforms types to host
e_args = e.original.args
# mixed-type to TCG helper bridge
args_tcg_compat = e_args.transform(HOST_2_TCG_COMPAT)
code_new = [
"%(tcg_type)s __%(name)s = %(tcg_func)s(%(name)s);" %
{"tcg_type": transform_type(type_, HOST_2_TCG),
"tcg_func": transform_type(type_, HOST_2_TCG_TMP_NEW),
"name": name}
for (type_, name) in args_tcg_compat
]
code_free = [
"%(tcg_func)s(__%(name)s);" %
{"tcg_func": transform_type(type_, HOST_2_TCG_TMP_FREE),
"name": name}
for (type_, name) in args_tcg_compat
]
gen_name = "gen_helper_" + e.api()
out('static inline void %(name)s(%(args)s)',
'{',
' %(code_new)s',
' %(proxy_name)s(%(tmp_names)s);',
' %(code_free)s',
'}',
name=gen_name,
args=e_args,
proxy_name=gen_name + "_proxy",
code_new="\n ".join(code_new),
code_free="\n ".join(code_free),
tmp_names=", ".join(["__%s" % name for _, name in e_args]),
)

8
trace/Makefile.objs
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@ -99,6 +99,14 @@ endif
##################################################
# Translation level
$(obj)/generated-helpers-wrappers.h: $(obj)/generated-helpers-wrappers.h-timestamp
$(obj)/generated-helpers-wrappers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
$(call quiet-command,$(TRACETOOL) \
--format=tcg-helper-wrapper-h \
--backend=$(TRACE_BACKENDS) \
< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
@cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@)
$(obj)/generated-helpers.h: $(obj)/generated-helpers.h-timestamp
$(obj)/generated-helpers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
$(call quiet-command,$(TRACETOOL) \