Commit ed63f34c authored by Wang Nan's avatar Wang Nan Committed by Arnaldo Carvalho de Melo
Browse files

perf tools: Make perf depend on libbpf 



By adding libbpf into perf's Makefile, this patch enables perf to build
libbpf if libelf is found and neither NO_LIBELF nor NO_LIBBPF is set.

The newly introduced code is similar to how libapi and libtraceevent
are wired into Makefile.perf.

MANIFEST is also updated for 'make perf-*-src-pkg'.

Append make_no_libbpf to tools/perf/tests/make.

The 'bpf' feature check is appended into default FEATURE_TESTS and
FEATURE_DISPLAY, so perf will check the API version of bpf in
/path/to/kernel/include/uapi/linux/bpf.h. Which should not fail except
when we are trying to port this code to an old kernel.

Error messages are also updated to notify users about the lack of BPF
support in 'perf record' if libelf is missing or the BPF API check
failed.

tools/lib/bpf is added to TAG_FOLDERS to allow us to navigate libbpf
files when working on perf using tools/perf/tags.

Signed-off-by: default avatarWang Nan <wangnan0@huawei.com>
Acked-by: default avatarAlexei Starovoitov <ast@plumgrid.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kaixu Xia <xiakaixu@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1444826502-49291-2-git-send-email-wangnan0@huawei.com


[ Document NO_LIBBPF in Makefile.perf, noted by Jiri Olsa ]
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 443f8c75

tools/build/Makefile.feature

+4 −2
Original line number Diff line number Diff line
@@ -53,7 +53,8 @@ FEATURE_TESTS ?= \ 
	libdw-dwarf-unwind		\

	zlib				\

	lzma				\

	get_cpuid

	get_cpuid			\

	bpf



FEATURE_DISPLAY ?=			\

	dwarf				\
@@ -71,7 +72,8 @@ FEATURE_DISPLAY ?= \ 
	libdw-dwarf-unwind		\

	zlib				\

	lzma				\

	get_cpuid

	get_cpuid			\

	bpf



# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.

# If in the future we need per-feature checks/flags for features not

tools/perf/MANIFEST

+3 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ tools/build 
tools/arch/x86/include/asm/atomic.h

tools/arch/x86/include/asm/rmwcc.h

tools/lib/traceevent

tools/lib/bpf

tools/lib/api

tools/lib/bpf

tools/lib/hweight.c
@@ -69,6 +70,8 @@ arch/*/lib/memset*.S 
include/linux/poison.h

include/linux/hw_breakpoint.h

include/uapi/linux/perf_event.h

include/uapi/linux/bpf.h

include/uapi/linux/bpf_common.h

include/uapi/linux/const.h

include/uapi/linux/swab.h

include/uapi/linux/hw_breakpoint.h

tools/perf/Makefile.perf

+19 −2
Original line number Diff line number Diff line
@@ -75,6 +75,8 @@ include config/utilities.mak 
# Define NO_LZMA if you do not want to support compressed (xz) kernel modules

#

# Define NO_AUXTRACE if you do not want AUX area tracing support

#

# Define NO_LIBBPF if you do not want BPF support



# As per kernel Makefile, avoid funny character set dependencies

unexport LC_ALL
@@ -145,6 +147,7 @@ AWK = awk 


LIB_DIR          = $(srctree)/tools/lib/api/

TRACE_EVENT_DIR = $(srctree)/tools/lib/traceevent/

BPF_DIR = $(srctree)/tools/lib/bpf/



# include config/Makefile by default and rule out

# non-config cases
@@ -180,6 +183,7 @@ strip-libs = $(filter-out -l%,$(1)) 


ifneq ($(OUTPUT),)

  TE_PATH=$(OUTPUT)

  BPF_PATH=$(OUTPUT)

ifneq ($(subdir),)

  LIB_PATH=$(OUTPUT)/../lib/api/

else
@@ -188,6 +192,7 @@ endif 
else

  TE_PATH=$(TRACE_EVENT_DIR)

  LIB_PATH=$(LIB_DIR)

  BPF_PATH=$(BPF_DIR)

endif



LIBTRACEEVENT = $(TE_PATH)libtraceevent.a
@@ -199,6 +204,8 @@ LIBTRACEEVENT_DYNAMIC_LIST_LDFLAGS = -Xlinker --dynamic-list=$(LIBTRACEEVENT_DYN 
LIBAPI = $(LIB_PATH)libapi.a

export LIBAPI



LIBBPF = $(BPF_PATH)libbpf.a



# python extension build directories

PYTHON_EXTBUILD     := $(OUTPUT)python_ext_build/

PYTHON_EXTBUILD_LIB := $(PYTHON_EXTBUILD)lib/
@@ -251,6 +258,9 @@ export PERL_PATH 
LIB_FILE=$(OUTPUT)libperf.a



PERFLIBS = $(LIB_FILE) $(LIBAPI) $(LIBTRACEEVENT)

ifndef NO_LIBBPF

  PERFLIBS += $(LIBBPF)

endif



# We choose to avoid "if .. else if .. else .. endif endif"

# because maintaining the nesting to match is a pain.  If
@@ -420,6 +430,13 @@ $(LIBAPI)-clean: 
	$(call QUIET_CLEAN, libapi)

	$(Q)$(MAKE) -C $(LIB_DIR) O=$(OUTPUT) clean >/dev/null



$(LIBBPF): FORCE

	$(Q)$(MAKE) -C $(BPF_DIR) O=$(OUTPUT) $(OUTPUT)libbpf.a



$(LIBBPF)-clean:

	$(call QUIET_CLEAN, libbpf)

	$(Q)$(MAKE) -C $(BPF_DIR) O=$(OUTPUT) clean >/dev/null



help:

	@echo 'Perf make targets:'

	@echo '  doc		- make *all* documentation (see below)'
@@ -459,7 +476,7 @@ INSTALL_DOC_TARGETS += quick-install-doc quick-install-man quick-install-html 
$(DOC_TARGETS):

	$(QUIET_SUBDIR0)Documentation $(QUIET_SUBDIR1) $(@:doc=all)



TAG_FOLDERS= . ../lib/traceevent ../lib/api ../lib/symbol ../include

TAG_FOLDERS= . ../lib/traceevent ../lib/api ../lib/symbol ../include ../lib/bpf

TAG_FILES= ../../include/uapi/linux/perf_event.h



TAGS:
@@ -567,7 +584,7 @@ config-clean: 
	$(call QUIET_CLEAN, config)

	$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null



clean: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean config-clean

clean: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean config-clean

	$(call QUIET_CLEAN, core-objs)  $(RM) $(LIB_FILE) $(OUTPUT)perf-archive $(OUTPUT)perf-with-kcore $(LANG_BINDINGS)

	$(Q)find . -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete

	$(Q)$(RM) $(OUTPUT).config-detected

tools/perf/config/Makefile

+18 −1
Original line number Diff line number Diff line
@@ -106,6 +106,7 @@ ifdef LIBBABELTRACE 
  FEATURE_CHECK_LDFLAGS-libbabeltrace := $(LIBBABELTRACE_LDFLAGS) -lbabeltrace-ctf

endif



FEATURE_CHECK_CFLAGS-bpf = -I. -I$(srctree)/tools/include -I$(srctree)/arch/$(ARCH)/include/uapi -I$(srctree)/include/uapi

# include ARCH specific config

-include $(src-perf)/arch/$(ARCH)/Makefile
@@ -237,6 +238,7 @@ ifdef NO_LIBELF 
  NO_DEMANGLE := 1

  NO_LIBUNWIND := 1

  NO_LIBDW_DWARF_UNWIND := 1

  NO_LIBBPF := 1

else

  ifeq ($(feature-libelf), 0)

    ifeq ($(feature-glibc), 1)
@@ -246,13 +248,14 @@ else 
      LIBC_SUPPORT := 1

    endif

    ifeq ($(LIBC_SUPPORT),1)

      msg := $(warning No libelf found, disables 'probe' tool, please install elfutils-libelf-devel/libelf-dev);

      msg := $(warning No libelf found, disables 'probe' tool and BPF support in 'perf record', please install elfutils-libelf-devel/libelf-dev);



      NO_LIBELF := 1

      NO_DWARF := 1

      NO_DEMANGLE := 1

      NO_LIBUNWIND := 1

      NO_LIBDW_DWARF_UNWIND := 1

      NO_LIBBPF := 1

    else

      ifneq ($(filter s% -static%,$(LDFLAGS),),)

        msg := $(error No static glibc found, please install glibc-static);
@@ -309,6 +312,13 @@ ifndef NO_LIBELF 
      $(call detected,CONFIG_DWARF)

    endif # PERF_HAVE_DWARF_REGS

  endif # NO_DWARF



  ifndef NO_LIBBPF

    ifeq ($(feature-bpf), 1)

      CFLAGS += -DHAVE_LIBBPF_SUPPORT

      $(call detected,CONFIG_LIBBPF)

    endif

  endif # NO_LIBBPF

endif # NO_LIBELF



ifeq ($(ARCH),powerpc)
@@ -324,6 +334,13 @@ ifndef NO_LIBUNWIND 
  endif

endif



ifndef NO_LIBBPF

  ifneq ($(feature-bpf), 1)

    msg := $(warning BPF API too old. Please install recent kernel headers. BPF support in 'perf record' is disabled.)

    NO_LIBBPF := 1

  endif

endif



dwarf-post-unwind := 1

dwarf-post-unwind-text := BUG

tools/perf/tests/make

+3 −1
Original line number Diff line number Diff line
@@ -44,6 +44,7 @@ make_no_libnuma := NO_LIBNUMA=1 
make_no_libaudit    := NO_LIBAUDIT=1

make_no_libbionic   := NO_LIBBIONIC=1

make_no_auxtrace    := NO_AUXTRACE=1

make_no_libbpf	    := NO_LIBBPF=1

make_tags           := tags

make_cscope         := cscope

make_help           := help
@@ -66,7 +67,7 @@ make_static := LDFLAGS=-static 
make_minimal        := NO_LIBPERL=1 NO_LIBPYTHON=1 NO_NEWT=1 NO_GTK2=1

make_minimal        += NO_DEMANGLE=1 NO_LIBELF=1 NO_LIBUNWIND=1 NO_BACKTRACE=1

make_minimal        += NO_LIBNUMA=1 NO_LIBAUDIT=1 NO_LIBBIONIC=1

make_minimal        += NO_LIBDW_DWARF_UNWIND=1 NO_AUXTRACE=1

make_minimal        += NO_LIBDW_DWARF_UNWIND=1 NO_AUXTRACE=1 NO_LIBBPF=1



# $(run) contains all available tests

run := make_pure
@@ -94,6 +95,7 @@ run += make_no_libnuma 
run += make_no_libaudit

run += make_no_libbionic

run += make_no_auxtrace

run += make_no_libbpf

run += make_help

run += make_doc

run += make_perf_o

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