From 49f550ea87c73671ee4d5e08820e0976894dd610 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Thu, 2 Apr 2020 10:52:49 +0900 Subject: perf tools: Add file-handle feature test The file handle (FHANDLE) support is configurable so some systems might not have it. So add a config feature item to check it on build time so that we don't add the cgroup tracking feature based on that. Committer notes: Had to make the test use the same construct as its later use in synthetic-events.c, in the next patch in this series. i.e. make it be: struct { struct file_handle fh; uint64_t cgroup_id; } handle; To cope with: CC /tmp/build/perf/util/cloexec.o util/synthetic-events.c:428:22: error: field 'fh' with CC /tmp/build/perf/util/call-path.o variable sized type 'struct file_handle' not at the end of a struct or class is a GNU extension [-Werror,-Wgnu-variable-sized-type-not-at-end] struct file_handle fh; ^ 1 error generated. Deal with this at some point, i.e. investigate if the right thing is to remove that -Wgnu-variable-sized-type-not-at-end from our CFLAGS, for now do the test the same way as it is used looks more sensible. Reported-by: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim Tested-by: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Mark Rutland Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20200402015249.3800462-1-namhyung@kernel.org [ split from a larger patch, removed blank line at EOF ] Signed-off-by: Arnaldo Carvalho de Melo --- tools/build/Makefile.feature | 3 ++- tools/build/feature/Makefile | 6 +++++- tools/build/feature/test-file-handle.c | 17 +++++++++++++++++ 3 files changed, 24 insertions(+), 2 deletions(-) create mode 100644 tools/build/feature/test-file-handle.c (limited to 'tools/build') diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature index 574c2e0b9d20..3e0c019ef297 100644 --- a/tools/build/Makefile.feature +++ b/tools/build/Makefile.feature @@ -72,7 +72,8 @@ FEATURE_TESTS_BASIC := \ setns \ libaio \ libzstd \ - disassembler-four-args + disassembler-four-args \ + file-handle # FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list # of all feature tests diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile index 7ac0d8088565..621f528f7822 100644 --- a/tools/build/feature/Makefile +++ b/tools/build/feature/Makefile @@ -67,7 +67,8 @@ FILES= \ test-llvm.bin \ test-llvm-version.bin \ test-libaio.bin \ - test-libzstd.bin + test-libzstd.bin \ + test-file-handle.bin FILES := $(addprefix $(OUTPUT),$(FILES)) @@ -321,6 +322,9 @@ $(OUTPUT)test-libaio.bin: $(OUTPUT)test-libzstd.bin: $(BUILD) -lzstd +$(OUTPUT)test-file-handle.bin: + $(BUILD) + ############################### clean: diff --git a/tools/build/feature/test-file-handle.c b/tools/build/feature/test-file-handle.c new file mode 100644 index 000000000000..4d3b03b27a0b --- /dev/null +++ b/tools/build/feature/test-file-handle.c @@ -0,0 +1,17 @@ +#define _GNU_SOURCE +#include +#include +#include +#include + +int main(void) +{ + struct { + struct file_handle fh; + uint64_t cgroup_id; + } handle; + int mount_id; + + name_to_handle_at(AT_FDCWD, "/", &handle.fh, &mount_id, 0); + return 0; +} -- cgit v1.2.3