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authorDaniel P. Berrange <berrange@redhat.com>2010-11-12 13:20:24 +0000
committerAnthony Liguori <aliguori@us.ibm.com>2010-11-21 09:16:56 -0600
commitb3d08c029dd78ded5e35b74eaaa3d361821f83a7 (patch)
tree0691de7f5d641ca9784caafd2af67c536b1e9c3f /Makefile
parent06da6e44d725117be404c3f342ef539099043fe4 (diff)
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Add a DTrace tracing backend targetted for SystemTAP compatability
This introduces a new tracing backend that targets the SystemTAP implementation of DTrace userspace tracing. The core functionality should be applicable and standard across any DTrace implementation on Solaris, OS-X, *BSD, but the Makefile rules will likely need some small additional changes to cope with OS specific build requirements. This backend builds a little differently from the other tracing backends. Specifically there is no 'trace.c' file, because the 'dtrace' command line tool generates a '.o' file directly from the dtrace probe definition file. The probe definition is usually named with a '.d' extension but QEMU uses '.d' files for its external makefile dependancy tracking, so this uses '.dtrace' as the extension for the probe definition file. The 'tracetool' program gains the ability to generate a trace.h file for DTrace, and also to generate the trace.d file containing the dtrace probe definition. Example usage of a dtrace probe in systemtap looks like: probe process("qemu").mark("qemu_malloc") { printf("Malloc %d %p\n", $arg1, $arg2); } * .gitignore: Ignore trace-dtrace.* * Makefile: Extra rules for generating DTrace files * Makefile.obj: Don't build trace.o for DTrace, use trace-dtrace.o generated by 'dtrace' instead * tracetool: Support for generating DTrace data files Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile23
1 files changed, 23 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 6896319..747e47c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,9 @@
# Makefile for QEMU.
GENERATED_HEADERS = config-host.h trace.h qemu-options.def
+ifeq ($(TRACE_BACKEND),dtrace)
+GENERATED_HEADERS += trace-dtrace.h
+endif
ifneq ($(wildcard config-host.mak),)
# Put the all: rule here so that config-host.mak can contain dependencies.
@@ -108,7 +111,11 @@ ui/vnc.o: QEMU_CFLAGS += $(VNC_TLS_CFLAGS)
bt-host.o: QEMU_CFLAGS += $(BLUEZ_CFLAGS)
+ifeq ($(TRACE_BACKEND),dtrace)
+trace.h: trace.h-timestamp trace-dtrace.h
+else
trace.h: trace.h-timestamp
+endif
trace.h-timestamp: $(SRC_PATH)/trace-events config-host.mak
$(call quiet-command,sh $(SRC_PATH)/tracetool --$(TRACE_BACKEND) -h < $< > $@," GEN trace.h")
@cmp -s $@ trace.h || cp $@ trace.h
@@ -120,6 +127,20 @@ trace.c-timestamp: $(SRC_PATH)/trace-events config-host.mak
trace.o: trace.c $(GENERATED_HEADERS)
+trace-dtrace.h: trace-dtrace.dtrace
+ $(call quiet-command,dtrace -o $@ -h -s $<, " GEN trace-dtrace.h")
+
+# Normal practice is to name DTrace probe file with a '.d' extension
+# but that gets picked up by QEMU's Makefile as an external dependancy
+# rule file. So we use '.dtrace' instead
+trace-dtrace.dtrace: trace-dtrace.dtrace-timestamp
+trace-dtrace.dtrace-timestamp: $(SRC_PATH)/trace-events config-host.mak
+ $(call quiet-command,sh $(SRC_PATH)/tracetool --$(TRACE_BACKEND) -d < $< > $@," GEN trace-dtrace.dtrace")
+ @cmp -s $@ trace-dtrace.dtrace || cp $@ trace-dtrace.dtrace
+
+trace-dtrace.o: trace-dtrace.dtrace $(GENERATED_HEADERS)
+ $(call quiet-command,dtrace -o $@ -G -s $<, " GEN trace-dtrace.o")
+
simpletrace.o: simpletrace.c $(GENERATED_HEADERS)
version.o: $(SRC_PATH)/version.rc config-host.mak
@@ -157,6 +178,8 @@ 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-dtrace.dtrace trace-dtrace.dtrace-timestamp
+ rm -f trace-dtrace.h trace-dtrace.h-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; \