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authorNamhyung Kim <namhyung@kernel.org>2020-04-02 10:52:49 +0900
committerArnaldo Carvalho de Melo <acme@redhat.com>2020-04-03 09:37:55 -0300
commit49f550ea87c73671ee4d5e08820e0976894dd610 (patch)
tree72e81a6ee2f3622247df34d8570f0bab02f1b1e2
parent460c3ed999d700fa84c953f83141f580ef456b3c (diff)
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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 <acme@kernel.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> 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 <acme@redhat.com>
-rw-r--r--tools/build/Makefile.feature3
-rw-r--r--tools/build/feature/Makefile6
-rw-r--r--tools/build/feature/test-file-handle.c17
-rw-r--r--tools/perf/Makefile.config4
4 files changed, 28 insertions, 2 deletions
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:
+ $(BUILD)
+
###############################
clean:
diff --git a/tools/build/feature/test-file-handle.c b/tools/build/feature/test-file-handle.c
new file mode 100644
index 000000000000..4d3b03b27a0b
--- /dev/null
+++ b/tools/build/feature/test-file-handle.c
@@ -0,0 +1,17 @@
+#define _GNU_SOURCE
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <inttypes.h>
+
+int main(void)
+{
+ struct {
+ struct file_handle fh;
+ uint64_t cgroup_id;
+ } handle;
+ int mount_id;
+
+ name_to_handle_at(AT_FDCWD, "/", &handle.fh, &mount_id, 0);
+ return 0;
+}
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 80e55e796be9..eb95c0c0a169 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -348,6 +348,10 @@ ifeq ($(feature-gettid), 1)
CFLAGS += -DHAVE_GETTID
endif
+ifeq ($(feature-file-handle), 1)
+ CFLAGS += -DHAVE_FILE_HANDLE
+endif
+
ifdef NO_LIBELF
NO_DWARF := 1
NO_DEMANGLE := 1