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perf tools: Add feature test for __sync_val_compare_and_swap 

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>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1405332185-4050-30-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2014-07-14 13:02:53 +03:00 committed by Arnaldo Carvalho de Melo
parent a8a8f3eb5d
commit f6d313699a
4 changed files with 29 additions and 0 deletions
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6
tools/perf/config/Makefile
View File

@ -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)

4
tools/perf/config/feature-checks/Makefile
View File

@ -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
###############################

5
tools/perf/config/feature-checks/test-all.c
View File

@ -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;
}

14
tools/perf/config/feature-checks/test-sync-compare-and-swap.c Normal file
View File

@ -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;
}