| From | Alexander Shishkin <> | Subject | [PATCH v0 21/71] perf tools: Add feature test for __sync_val_compare_and_swap | Date | Wed, 11 Dec 2013 14:36:33 +0200 |
| |
From: Adrian Hunter <adrian.hunter@intel.com>
Add a feature test for __sync_val_compare_and_swap() and __sync_bool_compare_and_swap()
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> --- tools/perf/config/Makefile | 5 +++++ tools/perf/config/feature-checks/Makefile | 4 ++++ tools/perf/config/feature-checks/test-all.c | 5 +++++ .../config/feature-checks/test-sync-compare-and-swap.c | 14 ++++++++++++++ 4 files changed, 28 insertions(+) create mode 100644 tools/perf/config/feature-checks/test-sync-compare-and-swap.c
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile index bae1072..43a2879 100644 --- a/tools/perf/config/Makefile +++ b/tools/perf/config/Makefile @@ -126,6 +126,7 @@ CORE_FEATURE_TESTS = \ backtrace \ dwarf \ fortify-source \ + sync-compare-and-swap \ glibc \ gtk2 \ gtk2-infobar \ @@ -234,6 +235,10 @@ CFLAGS += -I$(LIB_INCLUDE) CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE +ifeq ($(feature-sync-compare-and-swap), 1) + CFLAGS += -DHAVE_SYNC_COMPARE_AND_SWAP_SUPPORT +endif + ifndef NO_BIONIC $(call feature_check,bionic) ifeq ($(feature-bionic), 1) diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile index b8bb749..b4b7bb2 100644 --- a/tools/perf/config/feature-checks/Makefile +++ b/tools/perf/config/feature-checks/Makefile @@ -5,6 +5,7 @@ FILES= \ test-bionic \ test-dwarf \ test-fortify-source \ + test-sync-compare-and-swap \ test-glibc \ test-gtk2 \ test-gtk2-infobar \ @@ -140,6 +141,9 @@ test-backtrace: test-timerfd: $(BUILD) +test-sync-compare-and-swap: + $(BUILD) + -include *.d ############################### diff --git a/tools/perf/config/feature-checks/test-all.c b/tools/perf/config/feature-checks/test-all.c index 9b8a544..5cfec18 100644 --- a/tools/perf/config/feature-checks/test-all.c +++ b/tools/perf/config/feature-checks/test-all.c @@ -89,6 +89,10 @@ # include "test-stackprotector-all.c" #undef main +#define main main_test_sync_compare_and_swap +# include "test-sync-compare-and-swap.c" +#undef main + int main(int argc, char *argv[]) { main_test_libpython(); @@ -111,6 +115,7 @@ int main(int argc, char *argv[]) main_test_libnuma(); main_test_timerfd(); main_test_stackprotector_all(); + main_test_sync_compare_and_swap(); return 0; } diff --git a/tools/perf/config/feature-checks/test-sync-compare-and-swap.c b/tools/perf/config/feature-checks/test-sync-compare-and-swap.c new file mode 100644 index 0000000..c34d4ca --- /dev/null +++ b/tools/perf/config/feature-checks/test-sync-compare-and-swap.c @@ -0,0 +1,14 @@ +#include <stdint.h> + +volatile uint64_t x; + +int main(int argc, char *argv[]) +{ + uint64_t old, new = argc; + + argv = argv; + do { + old = __sync_val_compare_and_swap(&x, 0, 0); + } while (!__sync_bool_compare_and_swap(&x, old, new)); + return old == new; +} -- 1.8.5.1
|