5973e6ebc0
The futex syscall is a complicated one. It supports thirteen multiplexed operations, each with different semantics and encodings for the syscalls six arguments. Manually decoding these arguments is tedious and error prone. This plugin provides symbolic names for futex operations, futex flags, and tries to be intelligent about the intent of specific arguments (for example, waking operations use 'val' as an integer count, not just an arbitrary value). It doesn't do a full decode of the FUTEX_WAKE_OP's 'val3' argument, however, this is a good starting point. Link: http://lkml.kernel.org/r/20171207025649.12160-1-julia@ni.com Link: http://lore.kernel.org/linux-trace-devel/20200702174950.123454-3-tz.stoyanov@gmail.com Signed-off-by: Julia Cartwright <julia@ni.com> [ Ported from trace-cmd.git ] Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: linux-trace-devel@vger.kernel.org Link: http://lore.kernel.org/lkml/20200702185705.127175788@goodmis.org Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
226 lines
6.0 KiB
Makefile
226 lines
6.0 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#MAKEFLAGS += --no-print-directory
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# Makefiles suck: This macro sets a default value of $(2) for the
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# variable named by $(1), unless the variable has been set by
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# environment or command line. This is necessary for CC and AR
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# because make sets default values, so the simpler ?= approach
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# won't work as expected.
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define allow-override
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$(if $(or $(findstring environment,$(origin $(1))),\
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$(findstring command line,$(origin $(1)))),,\
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$(eval $(1) = $(2)))
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endef
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# Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
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$(call allow-override,CC,$(CROSS_COMPILE)gcc)
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$(call allow-override,AR,$(CROSS_COMPILE)ar)
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$(call allow-override,NM,$(CROSS_COMPILE)nm)
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$(call allow-override,PKG_CONFIG,pkg-config)
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EXT = -std=gnu99
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INSTALL = install
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# Use DESTDIR for installing into a different root directory.
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# This is useful for building a package. The program will be
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# installed in this directory as if it was the root directory.
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# Then the build tool can move it later.
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DESTDIR ?=
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DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
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LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1)
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ifeq ($(LP64), 1)
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libdir_relative_tmp = lib64
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else
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libdir_relative_tmp = lib
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endif
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libdir_relative ?= $(libdir_relative_tmp)
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prefix ?= /usr/local
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libdir = $(prefix)/$(libdir_relative)
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set_plugin_dir := 1
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# Set plugin_dir to preffered global plugin location
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# If we install under $HOME directory we go under
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# $(HOME)/.local/lib/traceevent/plugins
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#
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# We dont set PLUGIN_DIR in case we install under $HOME
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# directory, because by default the code looks under:
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# $(HOME)/.local/lib/traceevent/plugins by default.
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#
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ifeq ($(plugin_dir),)
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ifeq ($(prefix),$(HOME))
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override plugin_dir = $(HOME)/.local/lib/traceevent/plugins
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set_plugin_dir := 0
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else
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override plugin_dir = $(libdir)/traceevent/plugins
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endif
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endif
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ifeq ($(set_plugin_dir),1)
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PLUGIN_DIR = -DPLUGIN_DIR="$(plugin_dir)"
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PLUGIN_DIR_SQ = '$(subst ','\'',$(PLUGIN_DIR))'
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endif
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include ../../../scripts/Makefile.include
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# copy a bit from Linux kbuild
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ifeq ("$(origin V)", "command line")
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VERBOSE = $(V)
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endif
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ifndef VERBOSE
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VERBOSE = 0
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endif
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ifeq ($(srctree),)
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srctree := $(patsubst %/,%,$(dir $(CURDIR)))
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srctree := $(patsubst %/,%,$(dir $(srctree)))
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srctree := $(patsubst %/,%,$(dir $(srctree)))
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srctree := $(patsubst %/,%,$(dir $(srctree)))
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#$(info Determined 'srctree' to be $(srctree))
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endif
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export prefix libdir src obj
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# Shell quotes
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plugin_dir_SQ = $(subst ','\'',$(plugin_dir))
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CONFIG_INCLUDES =
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CONFIG_LIBS =
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CONFIG_FLAGS =
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OBJ = $@
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N =
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INCLUDES = -I. -I.. -I $(srctree)/tools/include $(CONFIG_INCLUDES)
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# Set compile option CFLAGS
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ifdef EXTRA_CFLAGS
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CFLAGS := $(EXTRA_CFLAGS)
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else
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CFLAGS := -g -Wall
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endif
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# Append required CFLAGS
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override CFLAGS += -fPIC
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override CFLAGS += $(CONFIG_FLAGS) $(INCLUDES) $(PLUGIN_DIR_SQ)
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override CFLAGS += $(udis86-flags) -D_GNU_SOURCE
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ifeq ($(VERBOSE),1)
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Q =
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else
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Q = @
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endif
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# Disable command line variables (CFLAGS) override from top
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# level Makefile (perf), otherwise build Makefile will get
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# the same command line setup.
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MAKEOVERRIDES=
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export srctree OUTPUT CC LD CFLAGS V
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build := -f $(srctree)/tools/build/Makefile.build dir=. obj
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DYNAMIC_LIST_FILE := $(OUTPUT)libtraceevent-dynamic-list
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PLUGINS = plugin_jbd2.so
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PLUGINS += plugin_hrtimer.so
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PLUGINS += plugin_kmem.so
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PLUGINS += plugin_kvm.so
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PLUGINS += plugin_mac80211.so
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PLUGINS += plugin_sched_switch.so
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PLUGINS += plugin_function.so
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PLUGINS += plugin_futex.so
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PLUGINS += plugin_xen.so
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PLUGINS += plugin_scsi.so
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PLUGINS += plugin_cfg80211.so
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PLUGINS += plugin_tlb.so
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PLUGINS := $(addprefix $(OUTPUT),$(PLUGINS))
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PLUGINS_IN := $(PLUGINS:.so=-in.o)
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plugins: $(PLUGINS) $(DYNAMIC_LIST_FILE)
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__plugin_obj = $(notdir $@)
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plugin_obj = $(__plugin_obj:-in.o=)
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$(PLUGINS_IN): force
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$(Q)$(MAKE) $(build)=$(plugin_obj)
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$(OUTPUT)libtraceevent-dynamic-list: $(PLUGINS)
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$(QUIET_GEN)$(call do_generate_dynamic_list_file, $(PLUGINS), $@)
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$(OUTPUT)%.so: $(OUTPUT)%-in.o
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$(QUIET_LINK)$(CC) $(CFLAGS) -shared $(LDFLAGS) -nostartfiles -o $@ $^
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define update_dir
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(echo $1 > $@.tmp; \
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if [ -r $@ ] && cmp -s $@ $@.tmp; then \
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rm -f $@.tmp; \
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else \
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echo ' UPDATE $@'; \
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mv -f $@.tmp $@; \
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fi);
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endef
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tags: force
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$(RM) tags
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find . -name '*.[ch]' | xargs ctags --extra=+f --c-kinds=+px \
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--regex-c++='/_PE\(([^,)]*).*/TEP_ERRNO__\1/'
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TAGS: force
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$(RM) TAGS
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find . -name '*.[ch]' | xargs etags \
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--regex='/_PE(\([^,)]*\).*/TEP_ERRNO__\1/'
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define do_install_mkdir
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if [ ! -d '$(DESTDIR_SQ)$1' ]; then \
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$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1'; \
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fi
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endef
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define do_install
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$(call do_install_mkdir,$2); \
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$(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR_SQ)$2'
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endef
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define do_install_plugins
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for plugin in $1; do \
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$(call do_install,$$plugin,$(plugin_dir_SQ)); \
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done
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endef
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define do_generate_dynamic_list_file
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symbol_type=`$(NM) -u -D $1 | awk 'NF>1 {print $$1}' | \
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xargs echo "U w W" | tr 'w ' 'W\n' | sort -u | xargs echo`;\
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if [ "$$symbol_type" = "U W" ];then \
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(echo '{'; \
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$(NM) -u -D $1 | awk 'NF>1 {print "\t"$$2";"}' | sort -u;\
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echo '};'; \
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) > $2; \
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else \
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(echo Either missing one of [$1] or bad version of $(NM)) 1>&2;\
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fi
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endef
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install: $(PLUGINS)
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$(call QUIET_INSTALL, trace_plugins) \
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$(call do_install_plugins, $(PLUGINS))
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clean:
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$(call QUIET_CLEAN, trace_plugins) \
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$(RM) *.o *~ $(TARGETS) *.a *.so $(VERSION_FILES) .*.d .*.cmd; \
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$(RM) $(OUTPUT)libtraceevent-dynamic-list \
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$(RM) TRACEEVENT-CFLAGS tags TAGS;
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PHONY += force plugins
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force:
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# Declare the contents of the .PHONY variable as phony. We keep that
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# information in a variable so we can use it in if_changed and friends.
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.PHONY: $(PHONY)
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