trace: add make dependencies on tracetool source

Patches that change tracetool can break the build if old build output
files are lying around.

This happens because the Makefile does not specify dependencies on
tracetool.  The build will use old object files that do not match the
current source code.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

diff --git a/trace/Makefile.objs b/trace/Makefile.objs
index 73bec383fc692bd120bbbbd5888f81a8e02b8164..5145b34d1a12ea6fbf0814a7c9f04a2388b6eaa7 100644 (file)
--- a/trace/Makefile.objs
+++ b/trace/Makefile.objs
@@ -1,12 +1,20 @@
 # -*- mode: makefile -*-
 
+######################################################################
+# tracetool source files
+# Every rule that invokes tracetool must depend on this so code is regenerated
+# if tracetool itself changes.
+
+tracetool-y = $(SRC_PATH)/scripts/tracetool.py
+tracetool-y += $(shell find $(SRC_PATH)/scripts/tracetool -name "*.py")
+
 ######################################################################
 # Auto-generated event descriptions for LTTng ust code
 
 ifeq ($(findstring ust,$(TRACE_BACKENDS)),ust)
 $(obj)/generated-ust-provider.h: $(obj)/generated-ust-provider.h-timestamp
        @cmp $< $@ >/dev/null 2>&1 || cp $< $@
-$(obj)/generated-ust-provider.h-timestamp: $(SRC_PATH)/trace-events
+$(obj)/generated-ust-provider.h-timestamp: $(SRC_PATH)/trace-events $(tracetool-y)
        $(call quiet-command,$(TRACETOOL) \
                --format=ust-events-h \
                --backends=$(TRACE_BACKENDS) \
@@ -14,7 +22,7 @@ $(obj)/generated-ust-provider.h-timestamp: $(SRC_PATH)/trace-events
 
 $(obj)/generated-ust.c: $(obj)/generated-ust.c-timestamp $(BUILD_DIR)/config-host.mak
        @cmp $< $@ >/dev/null 2>&1 || cp $< $@
-$(obj)/generated-ust.c-timestamp: $(SRC_PATH)/trace-events
+$(obj)/generated-ust.c-timestamp: $(SRC_PATH)/trace-events $(tracetool-y)
        $(call quiet-command,$(TRACETOOL) \
                --format=ust-events-c \
                --backends=$(TRACE_BACKENDS) \
@@ -29,7 +37,7 @@ endif
 
 $(obj)/generated-events.h: $(obj)/generated-events.h-timestamp
        @cmp $< $@ >/dev/null 2>&1 || cp $< $@
-$(obj)/generated-events.h-timestamp: $(SRC_PATH)/trace-events
+$(obj)/generated-events.h-timestamp: $(SRC_PATH)/trace-events $(tracetool-y)
        $(call quiet-command,$(TRACETOOL) \
                --format=events-h \
                --backends=$(TRACE_BACKENDS) \
@@ -37,7 +45,7 @@ $(obj)/generated-events.h-timestamp: $(SRC_PATH)/trace-events
 
 $(obj)/generated-events.c: $(obj)/generated-events.c-timestamp $(BUILD_DIR)/config-host.mak
        @cmp $< $@ >/dev/null 2>&1 || cp $< $@
-$(obj)/generated-events.c-timestamp: $(SRC_PATH)/trace-events
+$(obj)/generated-events.c-timestamp: $(SRC_PATH)/trace-events $(tracetool-y)
        $(call quiet-command,$(TRACETOOL) \
                --format=events-c \
                --backends=$(TRACE_BACKENDS) \
@@ -54,7 +62,7 @@ util-obj-y += generated-events.o
 
 $(obj)/generated-tracers.h: $(obj)/generated-tracers.h-timestamp
        @cmp -s $< $@ || cp $< $@
-$(obj)/generated-tracers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
+$(obj)/generated-tracers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak $(tracetool-y)
        $(call quiet-command,$(TRACETOOL) \
                --format=h \
                --backends=$(TRACE_BACKENDS) \
@@ -65,7 +73,7 @@ $(obj)/generated-tracers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/conf
 
 $(obj)/generated-tracers.c: $(obj)/generated-tracers.c-timestamp
        @cmp -s $< $@ || cp $< $@
-$(obj)/generated-tracers.c-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
+$(obj)/generated-tracers.c-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak $(tracetool-y)
        $(call quiet-command,$(TRACETOOL) \
                --format=c \
                --backends=$(TRACE_BACKENDS) \
@@ -82,7 +90,7 @@ $(obj)/generated-tracers.o: $(obj)/generated-tracers.c $(obj)/generated-tracers.
 ifeq ($(findstring dtrace,$(TRACE_BACKENDS)),dtrace)
 $(obj)/generated-tracers-dtrace.dtrace: $(obj)/generated-tracers-dtrace.dtrace-timestamp
        @cmp $< $@ >/dev/null 2>&1 || cp $< $@
-$(obj)/generated-tracers-dtrace.dtrace-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
+$(obj)/generated-tracers-dtrace.dtrace-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak $(tracetool-y)
        $(call quiet-command,$(TRACETOOL) \
                --format=d \
                --backends=$(TRACE_BACKENDS) \
@@ -101,7 +109,7 @@ endif
 
 $(obj)/generated-helpers-wrappers.h: $(obj)/generated-helpers-wrappers.h-timestamp
        @cmp $< $@ >/dev/null 2>&1 || cp $< $@
-$(obj)/generated-helpers-wrappers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
+$(obj)/generated-helpers-wrappers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak $(tracetool-y)
        $(call quiet-command,$(TRACETOOL) \
                --format=tcg-helper-wrapper-h \
                --backend=$(TRACE_BACKENDS) \
@@ -109,7 +117,7 @@ $(obj)/generated-helpers-wrappers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_
 
 $(obj)/generated-helpers.h: $(obj)/generated-helpers.h-timestamp
        @cmp $< $@ >/dev/null 2>&1 || cp $< $@
-$(obj)/generated-helpers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
+$(obj)/generated-helpers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak $(tracetool-y)
        $(call quiet-command,$(TRACETOOL) \
                --format=tcg-helper-h \
                --backend=$(TRACE_BACKENDS) \
@@ -117,7 +125,7 @@ $(obj)/generated-helpers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/conf
 
 $(obj)/generated-helpers.c: $(obj)/generated-helpers.c-timestamp
        @cmp $< $@ >/dev/null 2>&1 || cp $< $@
-$(obj)/generated-helpers.c-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
+$(obj)/generated-helpers.c-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak $(tracetool-y)
        $(call quiet-command,$(TRACETOOL) \
                --format=tcg-helper-c \
                --backend=$(TRACE_BACKENDS) \
@@ -130,7 +138,7 @@ target-obj-y += generated-helpers.o
 
 $(obj)/generated-tcg-tracers.h: $(obj)/generated-tcg-tracers.h-timestamp
        @cmp $< $@ >/dev/null 2>&1 || cp $< $@
-$(obj)/generated-tcg-tracers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
+$(obj)/generated-tcg-tracers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak $(tracetool-y)
        $(call quiet-command,$(TRACETOOL) \
                --format=tcg-h \
                --backend=$(TRACE_BACKENDS) \