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Subject[tip:perf/core] perf build: Add sdt feature detection
Commit-ID:  e26e63be64a108c1fd12020b93b5b447ffe0532b
Gitweb: http://git.kernel.org/tip/e26e63be64a108c1fd12020b93b5b447ffe0532b
Author: Masami Hiramatsu <mhiramat@kernel.org>
AuthorDate: Tue, 12 Jul 2016 19:05:56 +0900
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Wed, 13 Jul 2016 23:09:09 -0300

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: Masami 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: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/build/Makefile.feature | 3 ++-
tools/build/feature/Makefile | 6 +++++-
tools/build/feature/test-all.c | 5 +++++
tools/build/feature/test-sdt.c | 7 +++++++
tools/perf/Makefile.perf | 3 +++
tools/perf/config/Makefile | 10 ++++++++++
tools/perf/tests/make | 3 ++-
7 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
index fe12bee..a120c6b 100644
--- a/tools/build/Makefile.feature
+++ b/tools/build/Makefile.feature
@@ -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
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index d6017c1..a0b29a3 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -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

###############################
diff --git a/tools/build/feature/test-all.c b/tools/build/feature/test-all.c
index 843aed0..699e436 100644
--- a/tools/build/feature/test-all.c
+++ b/tools/build/feature/test-all.c
@@ -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;
}
diff --git a/tools/build/feature/test-sdt.c b/tools/build/feature/test-sdt.c
new file mode 100644
index 0000000..e4531a6
--- /dev/null
+++ b/tools/build/feature/test-sdt.c
@@ -0,0 +1,7 @@
+#include <sys/sdt.h>
+
+int main(void)
+{
+ DTRACE_PROBE(provider, name);
+ return 0;
+}
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index feb2c66..a129fbc 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -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

diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index 5ac4280..24803c5 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -355,6 +355,16 @@ ifndef NO_LIBELF
endif # NO_LIBBPF
endif # NO_LIBELF

+ifndef NO_SDT
+ ifneq ($(feature-sdt), 1)
+ msg := $(warning No sys/sdt.h found, no SDT events are defined, please install systemtap-sdt-devel or systemtap-sdt-dev);
+ NO_SDT := 1;
+ else
+ CFLAGS += -DHAVE_SDT_EVENT
+ $(call detected,CONFIG_SDT_EVENT)
+ endif
+endif
+
ifdef PERF_HAVE_JITDUMP
ifndef NO_DWARF
$(call detected,CONFIG_JITDUMP)
diff --git a/tools/perf/tests/make b/tools/perf/tests/make
index 51966d9..143f4d5 100644
--- a/tools/perf/tests/make
+++ b/tools/perf/tests/make
@@ -82,6 +82,7 @@ make_no_auxtrace := NO_AUXTRACE=1
make_no_libbpf := NO_LIBBPF=1
make_no_libcrypto := NO_LIBCRYPTO=1
make_with_babeltrace:= LIBBABELTRACE=1
+make_no_sdt := NO_SDT=1
make_tags := tags
make_cscope := cscope
make_help := help
@@ -105,7 +106,7 @@ 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 NO_LIBBPF=1
-make_minimal += NO_LIBCRYPTO=1
+make_minimal += NO_LIBCRYPTO=1 NO_SDT=1

# $(run) contains all available tests
run := make_pure
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