tools build feature: Check if pthread_barrier_t is available

As 'perf bench futex wake-parallel" will use this, which is not
available in older systems such as versions of the android NDK used in
my container build tests (r12b and r15c at the moment).

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: James Yang <james.yang@arm.com
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kim Phillips <kim.phillips@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-1i7iv54in4wj08lwo55b0pzv@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
index c71a05b..e52fcef 100644 (file)
--- a/tools/build/Makefile.feature
+++ b/tools/build/Makefile.feature
@@ -56,6 +56,7 @@ FEATURE_TESTS_BASIC :=                  \
         libunwind-arm                   \
         libunwind-aarch64               \
         pthread-attr-setaffinity-np     \
+        pthread-barrier                \
         stackprotector-all              \
         timerfd                         \
         libdw-dwarf-unwind              \

diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index 9698264..cff38f3 100644 (file)
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -37,6 +37,7 @@ FILES=                                          \
          test-libunwind-debug-frame-arm.bin     \
          test-libunwind-debug-frame-aarch64.bin \
          test-pthread-attr-setaffinity-np.bin   \
+         test-pthread-barrier.bin              \
          test-stackprotector-all.bin            \
          test-timerfd.bin                       \
          test-libdw-dwarf-unwind.bin            \
@@ -79,6 +80,9 @@ $(OUTPUT)test-hello.bin:
 $(OUTPUT)test-pthread-attr-setaffinity-np.bin:
        $(BUILD) -D_GNU_SOURCE -lpthread
 
+$(OUTPUT)test-pthread-barrier.bin:
+       $(BUILD) -lpthread
+
 $(OUTPUT)test-stackprotector-all.bin:
        $(BUILD) -fstack-protector-all
 

diff --git a/tools/build/feature/test-all.c b/tools/build/feature/test-all.c
index 4112702..6fdf832 100644 (file)
--- a/tools/build/feature/test-all.c
+++ b/tools/build/feature/test-all.c
@@ -118,6 +118,10 @@
 # include "test-pthread-attr-setaffinity-np.c"
 #undef main
 
+#define main main_test_pthread_barrier
+# include "test-pthread-barrier.c"
+#undef main
+
 #define main main_test_sched_getcpu
 # include "test-sched_getcpu.c"
 #undef main
@@ -187,6 +191,7 @@ int main(int argc, char *argv[])
        main_test_sync_compare_and_swap(argc, argv);
        main_test_zlib();
        main_test_pthread_attr_setaffinity_np();
+       main_test_pthread_barrier();
        main_test_lzma();
        main_test_get_cpuid();
        main_test_bpf();

diff --git a/tools/build/feature/test-pthread-barrier.c b/tools/build/feature/test-pthread-barrier.c
new file mode 100644 (file)
index 0000000..0558d93
--- /dev/null
+++ b/tools/build/feature/test-pthread-barrier.c
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdint.h>
+#include <pthread.h>
+
+int main(void)
+{
+       pthread_barrier_t barrier;
+
+       pthread_barrier_init(&barrier, NULL, 1);
+       pthread_barrier_wait(&barrier);
+       return pthread_barrier_destroy(&barrier);
+}

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index f6786fa..2c437ba 100644 (file)
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -263,6 +263,10 @@ ifeq ($(feature-pthread-attr-setaffinity-np), 1)
   CFLAGS += -DHAVE_PTHREAD_ATTR_SETAFFINITY_NP
 endif
 
+ifeq ($(feature-pthread-barrier), 1)
+  CFLAGS += -DHAVE_PTHREAD_BARRIER
+endif
+
 ifndef NO_BIONIC
   $(call feature_check,bionic)
   ifeq ($(feature-bionic), 1)