[PATCH 21/33] perf tools: Add feature test for __sync_val_compare_and_swap
From: Arnaldo Carvalho de Melo
Date: Thu Jul 17 2014 - 12:17:56 EST
From: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Add a feature test for __sync_val_compare_and_swap() and
__sync_bool_compare_and_swap()
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1405332185-4050-30-git-send-email-adrian.hunter@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/config/Makefile | 6 ++++++
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, 29 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 b7f42d577c4e..1f67aa02d240 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -164,6 +164,7 @@ CORE_FEATURE_TESTS = \
backtrace \
dwarf \
fortify-source \
+ sync-compare-and-swap \
glibc \
gtk2 \
gtk2-infobar \
@@ -199,6 +200,7 @@ LIB_FEATURE_TESTS = \
VF_FEATURE_TESTS = \
backtrace \
fortify-source \
+ sync-compare-and-swap \
gtk2-infobar \
libelf-getphdrnum \
libelf-mmap \
@@ -272,6 +274,10 @@ 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 64c84e5f0514..6088f8d8a434 100644
--- a/tools/perf/config/feature-checks/Makefile
+++ b/tools/perf/config/feature-checks/Makefile
@@ -5,6 +5,7 @@ FILES= \
test-bionic.bin \
test-dwarf.bin \
test-fortify-source.bin \
+ test-sync-compare-and-swap.bin \
test-glibc.bin \
test-gtk2.bin \
test-gtk2-infobar.bin \
@@ -141,6 +142,9 @@ test-timerfd.bin:
test-libdw-dwarf-unwind.bin:
$(BUILD)
+test-sync-compare-and-swap.bin:
+ $(BUILD) -Werror
+
-include *.d
###############################
diff --git a/tools/perf/config/feature-checks/test-all.c b/tools/perf/config/feature-checks/test-all.c
index fe5c1e5c952f..a7d022e161c0 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-libdw-dwarf-unwind.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_timerfd();
main_test_stackprotector_all();
main_test_libdw_dwarf_unwind();
+ main_test_sync_compare_and_swap(argc, argv);
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 000000000000..c34d4ca4af56
--- /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;
+}
--
1.9.3
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