diff options
| author | Lluís Vilanova <vilanova@ac.upc.edu> | 2014-05-27 15:02:14 +0200 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2014-06-09 15:43:40 +0200 |
| commit | 5b808275f3bbe8cc95bb9301f4d5a41331d0e0e6 (patch) | |
| tree | d5611a010851864336448529088cd94a9afcf83a /trace/Makefile.objs | |
| parent | 82432638ebeedda8a2e18838b6fbef4b14a94f31 (diff) | |
trace: Multi-backend tracing
Adds support to compile QEMU with multiple tracing backends at the same time.
For example, you can compile QEMU with:
$ ./configure --enable-trace-backends=ftrace,dtrace
Where 'ftrace' can be handy for having an in-flight record of events, and 'dtrace' can be later used to extract more information from the system.
This patch allows having both available without recompiling QEMU.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'trace/Makefile.objs')
| -rw-r--r-- | trace/Makefile.objs | 32 |
1 files changed, 15 insertions, 17 deletions
diff --git a/trace/Makefile.objs b/trace/Makefile.objs index 6a30467096..d7a86969a4 100644 --- a/trace/Makefile.objs +++ b/trace/Makefile.objs @@ -3,12 +3,12 @@ ###################################################################### # Auto-generated event descriptions for LTTng ust code -ifeq ($(TRACE_BACKEND),ust) +ifeq ($(findstring ust,$(TRACE_BACKENDS)),ust) $(obj)/generated-ust-provider.h: $(obj)/generated-ust-provider.h-timestamp $(obj)/generated-ust-provider.h-timestamp: $(SRC_PATH)/trace-events $(call quiet-command,$(TRACETOOL) \ --format=ust-events-h \ - --backend=$(TRACE_BACKEND) \ + --backends=$(TRACE_BACKENDS) \ < $< > $@," GEN $(patsubst %-timestamp,%,$@)") @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@) @@ -16,7 +16,7 @@ $(obj)/generated-ust.c: $(obj)/generated-ust.c-timestamp $(BUILD_DIR)/config-hos $(obj)/generated-ust.c-timestamp: $(SRC_PATH)/trace-events $(call quiet-command,$(TRACETOOL) \ --format=ust-events-c \ - --backend=$(TRACE_BACKEND) \ + --backends=$(TRACE_BACKENDS) \ < $< > $@," GEN $(patsubst %-timestamp,%,$@)") @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@) @@ -31,7 +31,7 @@ $(obj)/generated-events.h: $(obj)/generated-events.h-timestamp $(obj)/generated-events.h-timestamp: $(SRC_PATH)/trace-events $(call quiet-command,$(TRACETOOL) \ --format=events-h \ - --backend=$(TRACE_BACKEND) \ + --backends=$(TRACE_BACKENDS) \ < $< > $@," GEN $(patsubst %-timestamp,%,$@)") @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@) @@ -39,7 +39,7 @@ $(obj)/generated-events.c: $(obj)/generated-events.c-timestamp $(BUILD_DIR)/conf $(obj)/generated-events.c-timestamp: $(SRC_PATH)/trace-events $(call quiet-command,$(TRACETOOL) \ --format=events-c \ - --backend=$(TRACE_BACKEND) \ + --backends=$(TRACE_BACKENDS) \ < $< > $@," GEN $(patsubst %-timestamp,%,$@)") @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@) @@ -54,23 +54,21 @@ $(obj)/generated-tracers.h: $(obj)/generated-tracers.h-timestamp $(obj)/generated-tracers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak $(call quiet-command,$(TRACETOOL) \ --format=h \ - --backend=$(TRACE_BACKEND) \ + --backends=$(TRACE_BACKENDS) \ < $< > $@," GEN $(patsubst %-timestamp,%,$@)") ###################################################################### # Auto-generated tracing routines (non-DTrace) -ifneq ($(TRACE_BACKEND),dtrace) $(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 $(call quiet-command,$(TRACETOOL) \ --format=c \ - --backend=$(TRACE_BACKEND) \ + --backends=$(TRACE_BACKENDS) \ < $< > $@," GEN $(patsubst %-timestamp,%,$@)") $(obj)/generated-tracers.o: $(obj)/generated-tracers.c $(obj)/generated-tracers.h -endif ###################################################################### @@ -79,27 +77,27 @@ endif # Normal practice is to name DTrace probe file with a '.d' extension # but that gets picked up by QEMU's Makefile as an external dependency # rule file. So we use '.dtrace' instead -ifeq ($(TRACE_BACKEND),dtrace) -$(obj)/generated-tracers.dtrace: $(obj)/generated-tracers.dtrace-timestamp -$(obj)/generated-tracers.dtrace-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak +ifeq ($(findstring dtrace,$(TRACE_BACKENDS)),dtrace) +$(obj)/generated-tracers-dtrace.dtrace: $(obj)/generated-tracers-dtrace.dtrace-timestamp +$(obj)/generated-tracers-dtrace.dtrace-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak $(call quiet-command,$(TRACETOOL) \ --format=d \ - --backend=$(TRACE_BACKEND) \ + --backends=$(TRACE_BACKENDS) \ < $< > $@," GEN $(patsubst %-timestamp,%,$@)") @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@) -$(obj)/generated-tracers-dtrace.h: $(obj)/generated-tracers.dtrace +$(obj)/generated-tracers-dtrace.h: $(obj)/generated-tracers-dtrace.dtrace $(call quiet-command,dtrace -o $@ -h -s $<, " GEN $@") -$(obj)/generated-tracers.o: $(obj)/generated-tracers.dtrace +$(obj)/generated-tracers-dtrace.o: $(obj)/generated-tracers-dtrace.dtrace + +util-obj-y += generated-tracers-dtrace.o endif ###################################################################### # Backend code -util-obj-$(CONFIG_TRACE_DEFAULT) += default.o util-obj-$(CONFIG_TRACE_SIMPLE) += simple.o -util-obj-$(CONFIG_TRACE_STDERR) += stderr.o util-obj-$(CONFIG_TRACE_FTRACE) += ftrace.o util-obj-$(CONFIG_TRACE_UST) += generated-ust.o util-obj-y += control.o |