lkml.org 
[lkml]   [2013]   [Dec]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v0 21/71] perf tools: Add feature test for __sync_val_compare_and_swap
Date
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


\
 
 \ /
  Last update: 2013-12-11 14:21    [W:0.708 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site