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Commit e26e63be authored by Masami Hiramatsu's avatar Masami Hiramatsu Committed by Arnaldo Carvalho de Melo
Browse files

perf build: Add sdt feature detection 



This checks whether sys/sdt.h is available or not, which is required for
DTRACE_PROBE().

We can disable this feature by passing NO_SDT=1 when building.

This flag will be used for SDT test case and further SDT events in
perftools.

Signed-off-by: default avatarMasami Hiramatsu <mhiramat@kernel.org>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/146831795615.17065.17513820540591053933.stgit@devbox


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 7e9fca51

tools/build/Makefile.feature

+2 −1
Original line number Diff line number Diff line
@@ -62,7 +62,8 @@ FEATURE_TESTS_BASIC := \ 
	zlib				\

	lzma				\

	get_cpuid			\

	bpf

	bpf				\

	sdt



# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list

# of all feature tests

tools/build/feature/Makefile

+5 −1
Original line number Diff line number Diff line
@@ -45,7 +45,8 @@ FILES= \ 
	test-zlib.bin			\

	test-lzma.bin			\

	test-bpf.bin			\

	test-get_cpuid.bin

	test-get_cpuid.bin		\

	test-sdt.bin



FILES := $(addprefix $(OUTPUT),$(FILES))
@@ -213,6 +214,9 @@ $(OUTPUT)test-get_cpuid.bin: 
$(OUTPUT)test-bpf.bin:

	$(BUILD)



$(OUTPUT)test-sdt.bin:

	$(BUILD)



-include $(OUTPUT)*.d



###############################

tools/build/feature/test-all.c

+5 −0
Original line number Diff line number Diff line
@@ -145,6 +145,10 @@ 
# include "test-libcrypto.c"

#undef main



#define main main_test_sdt

# include "test-sdt.c"

#undef main



int main(int argc, char *argv[])

{

	main_test_libpython();
@@ -178,6 +182,7 @@ int main(int argc, char *argv[]) 
	main_test_get_cpuid();

	main_test_bpf();

	main_test_libcrypto();

	main_test_sdt();



	return 0;

}

tools/build/feature/test-sdt.c

0 → 100644
+7 −0
Original line number Diff line number Diff line 
#include <sys/sdt.h>



int main(void)

{

	DTRACE_PROBE(provider, name);

	return 0;

}

tools/perf/Makefile.perf

+3 −0
Original line number Diff line number Diff line
@@ -81,6 +81,9 @@ include ../scripts/utilities.mak 
#

# Define NO_LIBBPF if you do not want BPF support

#

# Define NO_SDT if you do not want to define SDT event in perf tools,

# note that it doesn't disable SDT scanning support.

#

# Define FEATURES_DUMP to provide features detection dump file

# and bypass the feature detection