From 5a89c0a2d73f7157c358a4d7ec0d6ea92731cb4c Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Mon, 4 Apr 2016 09:38:30 -0700 Subject: Clear destination buffer updated by the previous run Clear the destination buffer updated by the previous run in bench-memcpy.c and test-memcpy.c to catch the error when the following implementations do not copy anything. PR string/19907 * benchtests/bench-memcpy.c (do_one_test): Clear the destination buffer updated by the previous run. * string/test-memcpy.c (do_one_test): Likewise. * benchtests/bench-memmove.c (do_one_test): Add a comment. * string/test-memmove.c (do_one_test): Likewise. --- benchtests/bench-memcpy.c | 4 ++++ benchtests/bench-memmove.c | 1 + string/test-memcpy.c | 6 ++++++ string/test-memmove.c | 1 + 4 files changed, 12 insertions(+) diff --git a/benchtests/bench-memcpy.c b/benchtests/bench-memcpy.c index c5a71925be..9d9e7b6879 100644 --- a/benchtests/bench-memcpy.c +++ b/benchtests/bench-memcpy.c @@ -55,6 +55,10 @@ do_one_test (impl_t *impl, char *dst, const char *src, size_t i, iters = INNER_LOOP_ITERS; timing_t start, stop, cur; + /* Must clear the destination buffer set by the previous run. */ + for (i = 0; i < len; i++) + dst[i] = 0; + if (CALL (impl, dst, src, len) != MEMCPY_RESULT (dst, len)) { error (0, 0, "Wrong result in function %s %p %p", impl->name, diff --git a/benchtests/bench-memmove.c b/benchtests/bench-memmove.c index c38596b41e..3858f2ac52 100644 --- a/benchtests/bench-memmove.c +++ b/benchtests/bench-memmove.c @@ -70,6 +70,7 @@ do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src, size_t i, iters = INNER_LOOP_ITERS; timing_t start, stop, cur; + /* This also clears the destination buffer set by the previous run. */ memcpy (src, orig_src, len); #ifdef TEST_BCOPY CALL (impl, src, dst, len); diff --git a/string/test-memcpy.c b/string/test-memcpy.c index 2a0994ca98..cb072f8674 100644 --- a/string/test-memcpy.c +++ b/string/test-memcpy.c @@ -53,6 +53,12 @@ static void do_one_test (impl_t *impl, char *dst, const char *src, size_t len) { + size_t i; + + /* Must clear the destination buffer set by the previous run. */ + for (i = 0; i < len; i++) + dst[i] = 0; + if (CALL (impl, dst, src, len) != MEMCPY_RESULT (dst, len)) { error (0, 0, "Wrong result in function %s %p %p", impl->name, diff --git a/string/test-memmove.c b/string/test-memmove.c index d2ab3f3c8d..43433297e5 100644 --- a/string/test-memmove.c +++ b/string/test-memmove.c @@ -68,6 +68,7 @@ static void do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src, size_t len) { + /* This also clears the destination buffer set by the previous run. */ memcpy (src, orig_src, len); #ifdef TEST_BCOPY CALL (impl, src, dst, len); -- cgit v1.2.1