Auto-generates file "trace-helper.h" to provide TCG helpers and "trace-helper.c"
to proxy these helpers onto trace event routines.
Only trace events with the 'gen' property are affected.
Signed-off-by: Lluís Vilanova <vilan...@ac.upc.edu>
---
.gitignore | 2 +
Makefile | 15 ++++++++
Makefile.target | 5 +--
trace-events | 5 +++
tracetool | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
5 files changed, 120 insertions(+), 5 deletions(-)
diff --git a/.gitignore b/.gitignore
index e4a351d..758f457 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,8 @@ config-host.*
config-target.*
trace.h
trace.c
+trace-helper.h
+trace-helper.c
*-timestamp
*-softmmu
*-darwin-user
diff --git a/Makefile b/Makefile
index 1886317..5975926 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
# Makefile for QEMU.
-GENERATED_HEADERS = config-host.h trace.h
+GENERATED_HEADERS = config-host.h trace.h trace-helper.h trace-helper.c
ifneq ($(wildcard config-host.mak),)
# Put the all: rule here so that config-host.mak can contain dependencies.
@@ -118,6 +118,18 @@ trace.c-timestamp: $(SRC_PATH)/trace-events config-host.mak
trace.o: trace.c $(GENERATED_HEADERS)
+trace-helper.h: trace-helper.h-timestamp
+trace-helper.h-timestamp: $(SRC_PATH)/trace-events config-host.mak
+ $(call quiet-command,sh $(SRC_PATH)/tracetool $(TRACETOOL_EXTRA)
--helper --$(TRACE_BACKEND) -h < $< > $@," GEN trace-helper.h")
+ @cmp -s $@ trace-helper.h || cp $@ trace-helper.h
+
+trace-helper.c: trace-helper.c-timestamp
+trace-helper.c-timestamp: $(SRC_PATH)/trace-events config-host.mak
+ $(call quiet-command,sh $(SRC_PATH)/tracetool $(TRACETOOL_EXTRA)
--helper --$(TRACE_BACKEND) -c < $< > $@," GEN trace-helper.c")
+ @cmp -s $@ trace-helper.c || cp $@ trace-helper.c
+
+trace-helper.o: trace-helper.c $(GENERATED_HEADERS)
+
simpletrace.o: simpletrace.c $(GENERATED_HEADERS)
version.o: $(SRC_PATH)/version.rc config-host.mak
@@ -154,6 +166,7 @@ clean:
rm -f slirp/*.o slirp/*.d audio/*.o audio/*.d block/*.o block/*.d
net/*.o net/*.d fsdev/*.o fsdev/*.d ui/*.o ui/*.d
rm -f qemu-img-cmds.h
rm -f trace.c trace.h trace.c-timestamp trace.h-timestamp
+ rm -f trace-helper.c trace-helper.h trace-helper.h-timestamp
trace-helper.c-timestamp
$(MAKE) -C tests clean
for d in $(ALL_SUBDIRS) libhw32 libhw64 libuser libdis libdis-user; do \
if test -d $$d; then $(MAKE) -C $$d $@ || exit 1; fi; \
diff --git a/Makefile.target b/Makefile.target
index 90867e7..c7e26e2 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -378,9 +378,8 @@ endif
$(QEMU_PROG)-prepare: $(GENERATED_HEADERS) $(LIBBACKDOOR_LIB)
$(LIBINSTRUMENT_LIB) $(QEMU_PROG)
-$(QEMU_PROG): $(obj-y) $(obj-$(TARGET_BASE_ARCH)-y) $(LIBBACKDOOR_LIB)
$(LIBINSTRUMENT_LIB)
- $(call LINK,$(obj-y) $(obj-$(TARGET_BASE_ARCH)-y)) $(LIBBACKDOOR_LIB)
$(LIBINSTRUMENT_LIB)
-
+$(QEMU_PROG): trace-helper.o $(obj-y) $(obj-$(TARGET_BASE_ARCH)-y)
$(LIBBACKDOOR_LIB) $(LIBINSTRUMENT_LIB)
+ $(call LINK,trace-helper.o $(obj-y) $(obj-$(TARGET_BASE_ARCH)-y))
$(LIBBACKDOOR_LIB) $(LIBINSTRUMENT_LIB)
gdbstub-xml.c: $(TARGET_XML_FILES) $(SRC_PATH)/feature_to_c.sh
$(call quiet-command,rm -f $@ && $(SHELL) $(SRC_PATH)/feature_to_c.sh
$@ $(TARGET_XML_FILES)," GEN $(TARGET_DIR)$@")
diff --git a/trace-events b/trace-events
index 3b91a1c..4a89d97 100644
--- a/trace-events
+++ b/trace-events
@@ -38,6 +38,11 @@
# is identified by the '--with-instrument' configure option).
# The original backend-specific function is still available under the name
# 'trace_##name##_backend'.
+#
+# - gen
+# Provide trace events suitable for using during TCG code generation.
+# Generates TCG function helpers reachable through 'helper_trace_gen_##name'
+# which proxy their calls onto 'trace_##name'.
# qemu-malloc.c
disable qemu_malloc(size_t size, void *ptr) "size %zu ptr %p"
diff --git a/tracetool b/tracetool
index 3172259..588f442 100755
--- a/tracetool
+++ b/tracetool
@@ -234,6 +234,38 @@ native_type()
################################################################################
### Backend code
+### nil -- H
+begin_h_nil()
+{
+ return
+}
+
+line_h_nil()
+{
+ return
+}
+
+end_h_nil()
+{
+ return
+}
+
+### nil -- C
+begin_c_nil()
+{
+ return
+}
+
+line_c_nil()
+{
+ return
+}
+
+end_c_nil()
+{
+ return
+}
+
### nop -- H
begin_h_nop()
{
@@ -507,6 +539,69 @@ line_c_regular()
return
}
+### Helper -- H
+traceto_h_helper()
+{
+ echo "/* This file is autogenerated by tracetool, do not edit. */"
+ convert h $1 nil
+}
+
+helper_h_type()
+{
+ case "$1" in
+ "void *"|"TCGv_ptr") echo "ptr";;
+ "uint32_t"|"TCGv_i64") echo "i32";;
+ "uint64_t"|"TCGv_i32") echo "i64";;
+ *) echo "i64";;
+ esac
+}
+
+line_h_helper()
+{
+ local gen
+ gen=$(get_property "$1" "gen")
+ [ "$gen" = "1" ] || return
+
+ local name argc argtypes
+ name=$(get_event_name "$1")
+ argc=$(get_argc "$1")
+ argtypes=$(get_argtypes "$1" helper_h_type)
+ echo "DEF_HELPER_$argc(trace_proxy_$name, void, $argtypes)"
+}
+
+### Helper -- C
+traceto_c_helper()
+{
+ cat <<EOF
+/* This file is autogenerated by tracetool, do not edit. */
+#include "trace.h"
+#include "helper.h"
+EOF
+ convert c $1 nil
+}
+
+line_c_helper()
+{
+ local gen
+ gen=$(get_property "$1" "gen")
+ [ "$gen" = "1" ] || return
+
+ local name api args argtypes_native argnames values
+ name=$(get_event_name "$1")
+ api=$(get_api_name "$1")
+ args=$(get_args "$1" native_type)
+ argtypes_native=$(get_argtypes "$1" native_type)
+ argnames=$(get_argnames "$1")
+ values=$(zip_lists "$argtypes_native" "$argnames" "(%s)%s")
+
+ cat <<EOF
+void helper_trace_proxy_$name($args)
+{
+ $api($values);
+}
+EOF
+}
+
################################################################################
### Generic code
@@ -551,6 +646,7 @@ Flags:
Frontends:
--regular Regular frontend
+ --helper Helper proxies
Backends:
--nop Tracing disabled
@@ -567,7 +663,7 @@ EOF
while [ $# -gt 0 ]; do
case $1 in
"--instrument") enable_instrument="1" ;;
- "--regular") frontend="${1#--}" ;;
+ "--regular"|"--helper") frontend="${1#--}" ;;
"--nop"|"--simple"|"--ust") backend="${1#--}" ;;
"-h"|"-c") output="${1#-}" ;;
"--check-backend") check=1 ;; # used by ./configure to test for backend
