Add support for generating a systemtap tapset static probes
This introduces generation of a qemu.stp/qemu-system-XXX.stp
files which provides tapsets with friendly names for static
probes & their arguments. Instead of
probe process("qemu").mark("qemu_malloc") {
printf("Malloc %d %p\n", $arg1, $arg2);
}
It is now possible todo
probe qemu.system.i386.qemu_malloc {
printf("Malloc %d %p\n", size, ptr);
}
There is one tapset defined per target arch, for both
user and system emulators.
* Makefile.target: Generate stp files for each target
* tracetool: Support for generating systemtap tapsets
* configure: Check for whether systemtap is available
with the DTrace backend
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>
diff --git a/Makefile.target b/Makefile.target
index 31c968c..2800f47 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -41,7 +41,27 @@
config-target.h: config-target.h-timestamp
config-target.h-timestamp: config-target.mak
-all: $(PROGS)
+ifdef CONFIG_SYSTEMTAP_TRACE
+stap: $(QEMU_PROG).stp
+
+ifdef CONFIG_USER_ONLY
+TARGET_TYPE=user
+else
+TARGET_TYPE=system
+endif
+
+$(QEMU_PROG).stp:
+ $(call quiet-command,sh $(SRC_PATH)/tracetool \
+ --$(TRACE_BACKEND) \
+ --binary $(bindir)/$(QEMU_PROG) \
+ --target-arch $(TARGET_ARCH) \
+ --target-type $(TARGET_TYPE) \
+ --stap < $(SRC_PATH)/trace-events > $(QEMU_PROG).stp," GEN $(QEMU_PROG).stp")
+else
+stap:
+endif
+
+all: $(PROGS) stap
# Dummy command so that make thinks it has done something
@true
@@ -341,6 +361,9 @@
rm -f *.o *.a *~ $(PROGS) nwfpe/*.o fpu/*.o
rm -f *.d */*.d tcg/*.o ide/*.o
rm -f hmp-commands.h qmp-commands.h gdbstub-xml.c
+ifdef CONFIG_SYSTEMTAP_TRACE
+ rm -f *.stp
+endif
install: all
ifneq ($(PROGS),)
@@ -349,6 +372,10 @@
$(STRIP) $(patsubst %,"$(DESTDIR)$(bindir)/%",$(PROGS))
endif
endif
+ifdef CONFIG_SYSTEMTAP_TRACE
+ $(INSTALL_DIR) "$(DESTDIR)$(datadir)/../systemtap/tapset"
+ $(INSTALL_DATA) $(QEMU_PROG).stp "$(DESTDIR)$(datadir)/../systemtap/tapset"
+endif
# Include automatically generated dependency files
-include $(wildcard *.d */*.d)
