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trace: switch to modular code generation for sub-directories

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Introduce rules in the top level Makefile that are able to generate
trace.[ch] files in every subdirectory which has a trace-events file.

The top level directory is handled specially, so instead of creating
trace.h, it creates trace-root.h. This allows sub-directories to
include the top level trace-root.h file, without ambiguity wrt to
the trace.g file in the current sub-dir.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 20170125161417.31949-7-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Daniel P. Berrange 2017-01-25 16:14:15 +00:00 • committed by Stefan Hajnoczi
parent 2098c56a9b
commit 0ab8ed18a6
44 changed files with 283 additions and 209 deletions
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94
trace/Makefile.objs
View file

@ -8,98 +8,16 @@
tracetool-y = $(SRC_PATH)/scripts/tracetool.py
tracetool-y += $(shell find $(SRC_PATH)/scripts/tracetool -name "*.py")
$(BUILD_DIR)/trace-events-all: $(trace-events-y:%=$(SRC_PATH)/%)
$(BUILD_DIR)/trace-events-all: $(trace-events-files)
$(call quiet-command,cat $^ > $@)
######################################################################
# Auto-generated event descriptions for LTTng ust code
ifeq ($(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: $(BUILD_DIR)/trace-events-all $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--group=all \
--format=ust-events-h \
--backends=$(TRACE_BACKENDS) \
$< > $@,"GEN","$(patsubst %-timestamp,%,$@)")
$(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: $(BUILD_DIR)/trace-events-all $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--group=all \
--format=ust-events-c \
--backends=$(TRACE_BACKENDS) \
$< > $@,"GEN","$(patsubst %-timestamp,%,$@)")
$(obj)/generated-tracers.h: $(obj)/generated-ust-provider.h
$(obj)/generated-tracers.c: $(obj)/generated-ust.c
endif
######################################################################
# Auto-generated tracing routines
##################################################
# Execution level
$(obj)/generated-tracers.h: $(obj)/generated-tracers.h-timestamp
@cmp -s $< $@ || cp $< $@
$(obj)/generated-tracers.h-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--group=all \
--format=h \
--backends=$(TRACE_BACKENDS) \
$< > $@,"GEN","$(patsubst %-timestamp,%,$@)")
##############################
# non-DTrace
$(obj)/generated-tracers.c: $(obj)/generated-tracers.c-timestamp
@cmp -s $< $@ || cp $< $@
$(obj)/generated-tracers.c-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--group=all \
--format=c \
--backends=$(TRACE_BACKENDS) \
$< > $@,"GEN","$(patsubst %-timestamp,%,$@)")
$(obj)/generated-tracers.o: $(obj)/generated-tracers.c $(obj)/generated-tracers.h
##############################
# DTrace
# Normal practice is to name DTrace probe file with a '.d' extension
# but that gets picked up by QEMU's Makefile as an external dependency
# rule file. So we use '.dtrace' instead
ifeq ($(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: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--group=all \
--format=d \
--backends=$(TRACE_BACKENDS) \
$< > $@,"GEN","$(patsubst %-timestamp,%,$@)")
$(obj)/generated-tracers-dtrace.h: $(obj)/generated-tracers-dtrace.dtrace
$(call quiet-command,dtrace -o $@ -h -s $<,"GEN","$@")
$(obj)/generated-tracers-dtrace.o: $(obj)/generated-tracers-dtrace.dtrace
util-obj-y += generated-tracers-dtrace.o
endif
##################################################
# Translation level
$(obj)/generated-helpers-wrappers.h: $(obj)/generated-helpers-wrappers.h-timestamp
@cmp $< $@ >/dev/null 2>&1 || cp $< $@
$(obj)/generated-helpers-wrappers.h-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(obj)/generated-helpers-wrappers.h-timestamp: $(trace-events-files) $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--group=all \
--format=tcg-helper-wrapper-h \
@ -108,7 +26,7 @@ $(obj)/generated-helpers-wrappers.h-timestamp: $(BUILD_DIR)/trace-events-all $(B
$(obj)/generated-helpers.h: $(obj)/generated-helpers.h-timestamp
@cmp $< $@ >/dev/null 2>&1 || cp $< $@
$(obj)/generated-helpers.h-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(obj)/generated-helpers.h-timestamp: $(trace-events-files) $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--group=all \
--format=tcg-helper-h \
@ -117,7 +35,7 @@ $(obj)/generated-helpers.h-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)
$(obj)/generated-helpers.c: $(obj)/generated-helpers.c-timestamp
@cmp $< $@ >/dev/null 2>&1 || cp $< $@
$(obj)/generated-helpers.c-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(obj)/generated-helpers.c-timestamp: $(trace-events-files) $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--group=all \
--format=tcg-helper-c \
@ -131,7 +49,7 @@ 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: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(obj)/generated-tcg-tracers.h-timestamp: $(trace-events-files) $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--group=all \
--format=tcg-h \
@ -142,10 +60,8 @@ $(obj)/generated-tcg-tracers.h-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_
######################################################################
# Backend code
util-obj-y += generated-tracers.o
util-obj-$(CONFIG_TRACE_SIMPLE) += simple.o
util-obj-$(CONFIG_TRACE_FTRACE) += ftrace.o
util-obj-$(CONFIG_TRACE_UST) += generated-ust.o
util-obj-y += control.o
target-obj-y += control-target.o
util-obj-y += qmp.o

2
trace/control-target.c
View file

@ -9,7 +9,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
#include "trace.h"
#include "trace-root.h"
#include "trace/control.h"
#include "translate-all.h"

2
trace/control.c
View file

@ -26,7 +26,7 @@
#include "qemu/error-report.h"
#include "qemu/config-file.h"
#include "monitor/monitor.h"
#include "trace.h"
#include "trace-root.h"
int trace_events_enabled_count;

2
trace/ftrace.c
View file

@ -10,8 +10,8 @@
*/
#include "qemu/osdep.h"
#include "trace.h"
#include "trace/control.h"
#include "trace/ftrace.h"
int trace_marker_fd;

1
trace/simple.c
View file

@ -13,7 +13,6 @@
#include <pthread.h>
#endif
#include "qemu/timer.h"
#include "trace.h"
#include "trace/control.h"
#include "trace/simple.h"