Add a '--with-instrument' configuration option pointing to user-provided
instrumentation callbacks.
Make is invoked on the user-provided directory, which must build a static
library that might contain extra code needed by the user-provided
instrumentation.
Signed-off-by: Lluís Vilanova <vilan...@ac.upc.edu>
---
Makefile.target | 29 ++++++++++++++++++++++++++---
configure | 19 +++++++++++++++++++
2 files changed, 45 insertions(+), 3 deletions(-)
diff --git a/Makefile.target b/Makefile.target
index 9152723..90867e7 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -351,12 +351,35 @@ libbackdoor-clean:
VPATH=$(VPATH) SRC_PATH=$(SRC_PATH) V="$(V)" clean || true
endif
+#########################################################
+# static instrumentation
+ifdef CONFIG_INSTRUMENT
+VPATH := $(VPATH):$(INSTRUMENT_PATH)
+
+LIBINSTRUMENT_LIB = libinstrument/libinstrument.a
+LIBINSTRUMENT_CLEAN = libinstrument-clean
+
+libinstrument/Makefile:
+ $(call quiet-command, mkdir -p libinstrument, " CREAT $(TARGET_DIR)$@")
+ $(call quiet-command, rm -f libinstrument/Makefile)
+ $(call quiet-command, ln -s $(INSTRUMENT_PATH)/Makefile
libinstrument/Makefile)
+
+libinstrument/libinstrument.a: libinstrument/Makefile force
+ $(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libinstrument
\
+ QEMU_CFLAGS="$(QEMU_CFLAGS) -I../target-$(TARGET_BASE_ARCH)"
\
+ TARGET_DIR=$(TARGET_DIR)libinstrument/ VPATH=$(VPATH)
\
+ SRC_PATH=$(SRC_PATH) V="$(V)" libinstrument.a)
+
+libinstrument-clean:
+ $(MAKE) $(SUBDIR_MAKEFLAGS) -C $(LIBINSTRUMENT_DIR)
\
+ VPATH=$(VPATH) SRC_PATH=$(SRC_PATH) V="$(V)" clean || true
+endif
-$(QEMU_PROG)-prepare: $(GENERATED_HEADERS) $(LIBBACKDOOR_LIB) $(QEMU_PROG)
+$(QEMU_PROG)-prepare: $(GENERATED_HEADERS) $(LIBBACKDOOR_LIB)
$(LIBINSTRUMENT_LIB) $(QEMU_PROG)
-$(QEMU_PROG): $(obj-y) $(obj-$(TARGET_BASE_ARCH)-y) $(LIBBACKDOOR_LIB)
- $(call LINK,$(obj-y) $(obj-$(TARGET_BASE_ARCH)-y)) $(LIBBACKDOOR_LIB)
+$(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)
gdbstub-xml.c: $(TARGET_XML_FILES) $(SRC_PATH)/feature_to_c.sh
diff --git a/configure b/configure
index 0de937e..454124c 100755
--- a/configure
+++ b/configure
@@ -333,6 +333,7 @@ trace_file="trace"
spice=""
backdoor=""
+instrument=""
# OS specific
if check_define __linux__ ; then
@@ -750,6 +751,14 @@ for opt do
backdoor=`readlink -f $backdoor`
fi
;;
+ --with-instrument=*) instrument="$optarg"
+ if test ! -f "$instrument/Makefile"; then
+ echo "ERROR: cannot make into $instrument"
+ show_help="yes"
+ else
+ instrument=`readlink -f $instrument`
+ fi
+ ;;
*) echo "ERROR: unknown option $opt"; show_help="yes"
;;
esac
@@ -942,6 +951,7 @@ echo " Default:trace-<pid>"
echo " --disable-spice disable spice"
echo " --enable-spice enable spice"
echo " --with-backdoor=PATH enable backdoor communication and compile
implementation in PATH"
+echo " --with-instrument=PATH enable static instrumentation and compile
user code in PATH"
echo ""
echo "NOTE: The object files are built at the place where configure is
launched"
exit 1
@@ -2335,6 +2345,9 @@ echo "spice support $spice"
if test -n "$backdoor"; then
echo "Backdoor comm. $backdoor"
fi
+if test -n "$instrument"; then
+ echo "Instrumentation $instrument"
+fi
if test $sdl_too_old = "yes"; then
echo "-> Your SDL version is too old - please upgrade to have SDL support"
@@ -2599,6 +2612,12 @@ if test -n "$backdoor"; then
echo "BACKDOOR_PATH=$backdoor" >> $config_host_mak
rm -rf *-{linux-user,softmmu}/libbackdoor/
fi
+if test -n "$instrument"; then
+ echo "CONFIG_INSTRUMENT=y" >> $config_host_mak
+ echo "INSTRUMENT_PATH=$instrument" >> $config_host_mak
+ QEMU_CFLAGS="-I$instrument $QEMU_CFLAGS"
+ rm -rf *-{linux-user,softmmu}/libinstrument/
+fi
# XXX: suppress that
if [ "$bsd" = "yes" ] ; then
--
1.7.1
--
"And it's much the same thing with knowledge, for whenever you learn
something new, the whole world becomes that much richer."
-- The Princess of Pure Reason, as told by Norton Juster in The Phantom
Tollbooth
