diff options
| author | Ian Rogers <[email protected]> | 2023-06-22 21:14:05 -0700 |
|---|---|---|
| committer | Namhyung Kim <[email protected]> | 2023-06-23 21:35:46 -0700 |
| commit | ae7eb5baad3fd5f9ff69a3721fdaa0324731cf8d (patch) | |
| tree | ba60d874e2e37e4b9b1f690fccaf39627305f5c6 | |
| parent | 06c39e742d46eb0a360563f0888ac8c3a9539f47 (diff) | |
perf build: Filter out BTF sources without a .BTF section
If generating vmlinux.h, make the code to generate it more tolerant by
filtering out paths to kernels that lack a .BTF section.
Signed-off-by: Ian Rogers <[email protected]>
Acked-by: Namhyung Kim <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: James Clark <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Yang Jihong <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Tiezhu Yang <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Namhyung Kim <[email protected]>
| -rw-r--r-- | tools/perf/Makefile.perf | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index a49eded5cc4f..0dee36d7d745 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -199,6 +199,7 @@ FLEX ?= flex BISON ?= bison STRIP = strip AWK = awk +READELF ?= readelf # include Makefile.config by default and rule out # non-config cases @@ -1086,12 +1087,34 @@ $(BPFTOOL): | $(SKEL_TMP_OUT) $(Q)CFLAGS= $(MAKE) -C ../bpf/bpftool \ OUTPUT=$(SKEL_TMP_OUT)/ bootstrap -VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ +# Paths to search for a kernel to generate vmlinux.h from. +VMLINUX_BTF_ELF_PATHS ?= $(if $(O),$(O)/vmlinux) \ $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ ../../vmlinux \ - /sys/kernel/btf/vmlinux \ /boot/vmlinux-$(shell uname -r) -VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) + +# Paths to BTF information. +VMLINUX_BTF_BTF_PATHS ?= /sys/kernel/btf/vmlinux + +# Filter out kernels that don't exist or without a BTF section. +VMLINUX_BTF_ELF_ABSPATHS ?= $(abspath $(wildcard $(VMLINUX_BTF_ELF_PATHS))) +VMLINUX_BTF_PATHS ?= $(shell for file in $(VMLINUX_BTF_ELF_ABSPATHS); \ + do \ + if [ -f $$file ] && ($(READELF) -S "$$file" | grep -q .BTF); \ + then \ + echo "$$file"; \ + fi; \ + done) \ + $(wildcard $(VMLINUX_BTF_BTF_PATHS)) + +# Select the first as the source of vmlinux.h. +VMLINUX_BTF ?= $(firstword $(VMLINUX_BTF_PATHS)) + +ifeq ($(VMLINUX_H),) + ifeq ($(VMLINUX_BTF),) + $(error Missing bpftool input for generating vmlinux.h) + endif +endif $(SKEL_OUT)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) ifeq ($(VMLINUX_H),) |