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-rw-r--r--.gitignore1
-rw-r--r--Makefile2
-rw-r--r--Makefile.objs4
-rw-r--r--Makefile.target6
-rw-r--r--docs/tracing.txt32
-rw-r--r--qemu-options.hx8
-rw-r--r--trace/Makefile.objs25
7 files changed, 45 insertions, 33 deletions
diff --git a/.gitignore b/.gitignore
index 38ee1c5681..9b6a968714 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@
/config-target.*
/config.status
/config-temp
+/trace-events-all
/trace/generated-tracers.h
/trace/generated-tracers.c
/trace/generated-tracers-dtrace.h
diff --git a/Makefile b/Makefile
index 53e4119c47..7087fc273b 100644
--- a/Makefile
+++ b/Makefile
@@ -487,7 +487,7 @@ endif
set -e; for x in $(KEYMAPS); do \
$(INSTALL_DATA) $(SRC_PATH)/pc-bios/keymaps/$$x "$(DESTDIR)$(qemu_datadir)/keymaps"; \
done
- $(INSTALL_DATA) $(SRC_PATH)/trace-events "$(DESTDIR)$(qemu_datadir)/trace-events"
+ $(INSTALL_DATA) $(BUILD_DIR)/trace-events-all "$(DESTDIR)$(qemu_datadir)/trace-events-all"
for d in $(TARGET_DIRS); do \
$(MAKE) $(SUBDIR_MAKEFLAGS) TARGET_DIR=$$d/ -C $$d $@ || exit 1 ; \
done
diff --git a/Makefile.objs b/Makefile.objs
index da49b7159f..697fc663e0 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -115,3 +115,7 @@ qga-vss-dll-obj-y = qga/
# contrib
ivshmem-client-obj-y = contrib/ivshmem-client/
ivshmem-server-obj-y = contrib/ivshmem-server/
+
+
+######################################################################
+trace-events-y = trace-events
diff --git a/Makefile.target b/Makefile.target
index 495b474931..d720b3e733 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -48,7 +48,7 @@ else
TARGET_TYPE=system
endif
-$(QEMU_PROG).stp-installed: $(SRC_PATH)/trace-events
+$(QEMU_PROG).stp-installed: $(BUILD_DIR)/trace-events-all
$(call quiet-command,$(TRACETOOL) \
--format=stap \
--backends=$(TRACE_BACKENDS) \
@@ -57,7 +57,7 @@ $(QEMU_PROG).stp-installed: $(SRC_PATH)/trace-events
--target-type=$(TARGET_TYPE) \
< $< > $@," GEN $(TARGET_DIR)$(QEMU_PROG).stp-installed")
-$(QEMU_PROG).stp: $(SRC_PATH)/trace-events
+$(QEMU_PROG).stp: $(BUILD_DIR)/trace-events-all
$(call quiet-command,$(TRACETOOL) \
--format=stap \
--backends=$(TRACE_BACKENDS) \
@@ -66,7 +66,7 @@ $(QEMU_PROG).stp: $(SRC_PATH)/trace-events
--target-type=$(TARGET_TYPE) \
< $< > $@," GEN $(TARGET_DIR)$(QEMU_PROG).stp")
-$(QEMU_PROG)-simpletrace.stp: $(SRC_PATH)/trace-events
+$(QEMU_PROG)-simpletrace.stp: $(BUILD_DIR)/trace-events-all
$(call quiet-command,$(TRACETOOL) \
--format=simpletrace-stap \
--backends=$(TRACE_BACKENDS) \
diff --git a/docs/tracing.txt b/docs/tracing.txt
index 0bd6b9cf9e..29f2f9a24d 100644
--- a/docs/tracing.txt
+++ b/docs/tracing.txt
@@ -23,20 +23,24 @@ for debugging, profiling, and observing execution.
4. Pretty-print the binary trace file:
- ./scripts/simpletrace.py trace-events trace-* # Override * with QEMU <pid>
+ ./scripts/simpletrace.py trace-events-all trace-* # Override * with QEMU <pid>
== Trace events ==
-There is a set of static trace events declared in the "trace-events" source
-file. Each trace event declaration names the event, its arguments, and the
-format string which can be used for pretty-printing:
+Each directory in the source tree can declare a set of static trace events
+in a "trace-events" file. Each trace event declaration names the event, its
+arguments, and the format string which can be used for pretty-printing:
qemu_vmalloc(size_t size, void *ptr) "size %zu ptr %p"
qemu_vfree(void *ptr) "ptr %p"
-The "trace-events" file is processed by the "tracetool" script during build to
-generate code for the trace events. Trace events are invoked directly from
-source code like this:
+All "trace-events" files must be listed in the "trace-event-y" make variable
+in the top level Makefile.objs. During build the individual files are combined
+to create a "trace-events-all" file, which is processed by the "tracetool"
+script during build to generate code for the trace events. The
+"trace-events-all" file is also installed into "/usr/share/qemu".
+
+Trace events are invoked directly from source code like this:
#include "trace.h" /* needed for trace event prototype */
@@ -196,12 +200,12 @@ Restriction: "ftrace" backend is restricted to Linux only.
==== Analyzing trace files ====
The "simple" backend produces binary trace files that can be formatted with the
-simpletrace.py script. The script takes the "trace-events" file and the binary
-trace:
+simpletrace.py script. The script takes the "trace-events-all" file and the
+binary trace:
- ./scripts/simpletrace.py trace-events trace-12345
+ ./scripts/simpletrace.py trace-events-all trace-12345
-You must ensure that the same "trace-events" file was used to build QEMU,
+You must ensure that the same "trace-events-all" file was used to build QEMU,
otherwise trace event declarations may have changed and output will not be
consistent.
@@ -259,11 +263,11 @@ probes:
--binary path/to/qemu-binary \
--target-type system \
--target-name x86_64 \
- <trace-events >qemu.stp
+ <trace-events-all >qemu.stp
== Trace event properties ==
-Each event in the "trace-events" file can be prefixed with a space-separated
+Each event in the "trace-events-all" file can be prefixed with a space-separated
list of zero or more of the following event properties.
=== "disable" ===
@@ -275,7 +279,7 @@ programmatically disabled.
In this case you should declare such event with the "disable" property. This
will effectively disable the event at compile time (by using the "nop" backend),
thus having no performance impact at all on regular builds (i.e., unless you
-edit the "trace-events" file).
+edit the "trace-events-all" file).
In addition, there might be cases where relatively complex computations must be
performed to generate values that are only used as arguments for a trace
diff --git a/qemu-options.hx b/qemu-options.hx
index 17f15ad1fe..44c658fd4e 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -3677,8 +3677,8 @@ Specify tracing options.
@table @option
@item [enable=]@var{pattern}
Immediately enable events matching @var{pattern}.
-The file must contain one event name (as listed in the @file{trace-events} file)
-per line; globbing patterns are accepted too. This option is only
+The file must contain one event name (as listed in the @file{trace-events-all}
+file) per line; globbing patterns are accepted too. This option is only
available if QEMU has been compiled with the @var{simple}, @var{stderr}
or @var{ftrace} tracing backend. To specify multiple events or patterns,
specify the @option{-trace} option multiple times.
@@ -3687,8 +3687,8 @@ Use @code{-trace help} to print a list of names of trace points.
@item events=@var{file}
Immediately enable events listed in @var{file}.
-The file must contain one event name (as listed in the @file{trace-events} file)
-per line; globbing patterns are accepted too. This option is only
+The file must contain one event name (as listed in the @file{trace-events-all}
+file) per line; globbing patterns are accepted too. This option is only
available if QEMU has been compiled with the @var{simple}, @var{stderr} or
@var{ftrace} tracing backend.
diff --git a/trace/Makefile.objs b/trace/Makefile.objs
index 5145b34d1a..cbe188e484 100644
--- a/trace/Makefile.objs
+++ b/trace/Makefile.objs
@@ -8,13 +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)/%)
+ $(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: $(SRC_PATH)/trace-events $(tracetool-y)
+$(obj)/generated-ust-provider.h-timestamp: $(BUILD_DIR)/trace-events-all $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--format=ust-events-h \
--backends=$(TRACE_BACKENDS) \
@@ -22,7 +25,7 @@ $(obj)/generated-ust-provider.h-timestamp: $(SRC_PATH)/trace-events $(tracetool-
$(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 $(tracetool-y)
+$(obj)/generated-ust.c-timestamp: $(BUILD_DIR)/trace-events-all $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--format=ust-events-c \
--backends=$(TRACE_BACKENDS) \
@@ -37,7 +40,7 @@ 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 $(tracetool-y)
+$(obj)/generated-events.h-timestamp: $(BUILD_DIR)/trace-events-all $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--format=events-h \
--backends=$(TRACE_BACKENDS) \
@@ -45,7 +48,7 @@ $(obj)/generated-events.h-timestamp: $(SRC_PATH)/trace-events $(tracetool-y)
$(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 $(tracetool-y)
+$(obj)/generated-events.c-timestamp: $(BUILD_DIR)/trace-events-all $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--format=events-c \
--backends=$(TRACE_BACKENDS) \
@@ -62,7 +65,7 @@ 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 $(tracetool-y)
+$(obj)/generated-tracers.h-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--format=h \
--backends=$(TRACE_BACKENDS) \
@@ -73,7 +76,7 @@ $(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 $(tracetool-y)
+$(obj)/generated-tracers.c-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--format=c \
--backends=$(TRACE_BACKENDS) \
@@ -90,7 +93,7 @@ $(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 $(tracetool-y)
+$(obj)/generated-tracers-dtrace.dtrace-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--format=d \
--backends=$(TRACE_BACKENDS) \
@@ -109,7 +112,7 @@ 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 $(tracetool-y)
+$(obj)/generated-helpers-wrappers.h-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--format=tcg-helper-wrapper-h \
--backend=$(TRACE_BACKENDS) \
@@ -117,7 +120,7 @@ $(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 $(tracetool-y)
+$(obj)/generated-helpers.h-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--format=tcg-helper-h \
--backend=$(TRACE_BACKENDS) \
@@ -125,7 +128,7 @@ $(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 $(tracetool-y)
+$(obj)/generated-helpers.c-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--format=tcg-helper-c \
--backend=$(TRACE_BACKENDS) \
@@ -138,7 +141,7 @@ 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 $(tracetool-y)
+$(obj)/generated-tcg-tracers.h-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_DIR)/config-host.mak $(tracetool-y)
$(call quiet-command,$(TRACETOOL) \
--format=tcg-h \
--backend=$(TRACE_BACKENDS) \
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-12 07:45:49 +0000