9967e4fec0
The Makefile uses intermediate timestamp files to avoid rebuilding if
tracetool output is unchanged.
Timestamps are implemented incorrectly. This was fixed for rules.mak in
commit 4b25966ab9 ("rules.mak: cleanup
config generation rules") but never fixed in trace/Makefile.objs.
The problem with the old timestamp implementation was that make doesn't
notice the updated file modification time until the next time it is run.
It was necessary to run make twice in a row to achieve a full rebuild.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
148 lines
5.4 KiB
Makefile
148 lines
5.4 KiB
Makefile
# -*- mode: makefile -*-
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######################################################################
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# Auto-generated event descriptions for LTTng ust code
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ifeq ($(findstring ust,$(TRACE_BACKENDS)),ust)
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$(obj)/generated-ust-provider.h: $(obj)/generated-ust-provider.h-timestamp
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@cmp $< $@ >/dev/null 2>&1 || cp $< $@
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$(obj)/generated-ust-provider.h-timestamp: $(SRC_PATH)/trace-events
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$(call quiet-command,$(TRACETOOL) \
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--format=ust-events-h \
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--backends=$(TRACE_BACKENDS) \
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< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
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$(obj)/generated-ust.c: $(obj)/generated-ust.c-timestamp $(BUILD_DIR)/config-host.mak
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@cmp $< $@ >/dev/null 2>&1 || cp $< $@
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$(obj)/generated-ust.c-timestamp: $(SRC_PATH)/trace-events
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$(call quiet-command,$(TRACETOOL) \
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--format=ust-events-c \
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--backends=$(TRACE_BACKENDS) \
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< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
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$(obj)/generated-events.h: $(obj)/generated-ust-provider.h
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$(obj)/generated-events.c: $(obj)/generated-ust.c
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endif
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######################################################################
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# Auto-generated event descriptions
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$(obj)/generated-events.h: $(obj)/generated-events.h-timestamp
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@cmp $< $@ >/dev/null 2>&1 || cp $< $@
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$(obj)/generated-events.h-timestamp: $(SRC_PATH)/trace-events
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$(call quiet-command,$(TRACETOOL) \
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--format=events-h \
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--backends=$(TRACE_BACKENDS) \
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< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
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$(obj)/generated-events.c: $(obj)/generated-events.c-timestamp $(BUILD_DIR)/config-host.mak
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@cmp $< $@ >/dev/null 2>&1 || cp $< $@
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$(obj)/generated-events.c-timestamp: $(SRC_PATH)/trace-events
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$(call quiet-command,$(TRACETOOL) \
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--format=events-c \
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--backends=$(TRACE_BACKENDS) \
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< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
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util-obj-y += generated-events.o
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######################################################################
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# Auto-generated tracing routines
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##################################################
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# Execution level
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$(obj)/generated-tracers.h: $(obj)/generated-tracers.h-timestamp
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@cmp -s $< $@ || cp $< $@
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$(obj)/generated-tracers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
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$(call quiet-command,$(TRACETOOL) \
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--format=h \
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--backends=$(TRACE_BACKENDS) \
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< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
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##############################
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# non-DTrace
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$(obj)/generated-tracers.c: $(obj)/generated-tracers.c-timestamp
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@cmp -s $< $@ || cp $< $@
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$(obj)/generated-tracers.c-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
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$(call quiet-command,$(TRACETOOL) \
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--format=c \
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--backends=$(TRACE_BACKENDS) \
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< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
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$(obj)/generated-tracers.o: $(obj)/generated-tracers.c $(obj)/generated-tracers.h
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##############################
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# DTrace
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# Normal practice is to name DTrace probe file with a '.d' extension
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# but that gets picked up by QEMU's Makefile as an external dependency
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# rule file. So we use '.dtrace' instead
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ifeq ($(findstring dtrace,$(TRACE_BACKENDS)),dtrace)
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$(obj)/generated-tracers-dtrace.dtrace: $(obj)/generated-tracers-dtrace.dtrace-timestamp
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@cmp $< $@ >/dev/null 2>&1 || cp $< $@
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$(obj)/generated-tracers-dtrace.dtrace-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
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$(call quiet-command,$(TRACETOOL) \
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--format=d \
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--backends=$(TRACE_BACKENDS) \
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< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
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$(obj)/generated-tracers-dtrace.h: $(obj)/generated-tracers-dtrace.dtrace
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$(call quiet-command,dtrace -o $@ -h -s $<, " GEN $@")
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$(obj)/generated-tracers-dtrace.o: $(obj)/generated-tracers-dtrace.dtrace
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util-obj-y += generated-tracers-dtrace.o
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endif
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##################################################
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# Translation level
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$(obj)/generated-helpers-wrappers.h: $(obj)/generated-helpers-wrappers.h-timestamp
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@cmp $< $@ >/dev/null 2>&1 || cp $< $@
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$(obj)/generated-helpers-wrappers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
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$(call quiet-command,$(TRACETOOL) \
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--format=tcg-helper-wrapper-h \
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--backend=$(TRACE_BACKENDS) \
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< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
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$(obj)/generated-helpers.h: $(obj)/generated-helpers.h-timestamp
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@cmp $< $@ >/dev/null 2>&1 || cp $< $@
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$(obj)/generated-helpers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
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$(call quiet-command,$(TRACETOOL) \
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--format=tcg-helper-h \
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--backend=$(TRACE_BACKENDS) \
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< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
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$(obj)/generated-helpers.c: $(obj)/generated-helpers.c-timestamp
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@cmp $< $@ >/dev/null 2>&1 || cp $< $@
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$(obj)/generated-helpers.c-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
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$(call quiet-command,$(TRACETOOL) \
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--format=tcg-helper-c \
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--backend=$(TRACE_BACKENDS) \
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< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
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$(obj)/generated-helpers.o: $(obj)/generated-helpers.c
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target-obj-y += generated-helpers.o
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$(obj)/generated-tcg-tracers.h: $(obj)/generated-tcg-tracers.h-timestamp
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@cmp $< $@ >/dev/null 2>&1 || cp $< $@
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$(obj)/generated-tcg-tracers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
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$(call quiet-command,$(TRACETOOL) \
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--format=tcg-h \
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--backend=$(TRACE_BACKENDS) \
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< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
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######################################################################
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# Backend code
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util-obj-$(CONFIG_TRACE_SIMPLE) += simple.o generated-tracers.o
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util-obj-$(CONFIG_TRACE_FTRACE) += ftrace.o
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util-obj-$(CONFIG_TRACE_UST) += generated-ust.o
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util-obj-y += control.o
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util-obj-y += qmp.o
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