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May be tricky for otimized implementations to handle strings around
page boundary once, for instance, it is performed unaligned loads or
when maxlen is used as a hint for vectorized loops. The test cases
should unveil regression bugs on these cases.
To some extend do_random_tests in string/test-strnlen tests strings
placed at page end but it does not cover all cases. So this change
adds tests which consists of placing strings of varying sizes ending
at the page boundary. It also combines with different values of maxlen.
Tested on ppc64le and x86_64.
* string/test-strnlen.c (do_page_tests): New function
to check length of strings ending at the page boundary.
(test_main): Added call to the do_page_tests function.
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Replaced all imports of test-skeleton.c with support/test-driver.c.
In some cases it was needed to adjust do_test to return int
instead of static int since that is the method's signature expected by
test-driver.c.
Checked on x86_64.
* string/test-string.h (TEST_FUNCTION): Use test_main instead of
test_main ().
(CMDLINE_PROCESS): Use function instead of defined macro.
* debug/test-strcpy_chk.c: Import support/test-driver.c and also
<suppport/support.h> to use set_fortify_handler().
* string/bug-envz1.c: Import support/test-driver.c instead of
test-skeleton.c.
* string/bug-strcoll2.c: Likewise.
* string/bug-strtok1.c: Likewise.
* string/stratcliff.c: Likewise.
* string/test-ffs.c: Likewise.
* string/test-memccpy.c: Likewise.
* string/test-memchr.c: Likewise.
* string/test-memcmp.c: Likewise.
* string/test-memcpy.c: Likewise.
* string/test-memmem.c: Likewise.
* string/test-memmove.c: Likewise.
* string/test-memrchr.c: Likewise.
* string/test-memset.c: Likewise.
* string/test-rawmemchr.c: Likewise.
* string/test-strcasecmp.c: Likewise.
* string/test-strcasestr.c: Likewise.
* string/test-strcat.c: Likewise.
* string/test-strchr.c: Likewise.
* string/test-strcmp.c: Likewise.
* string/test-strcpy.c: Likewise.
* string/test-string.h: Likewise.
* string/test-strlen.c: Likewise.
* string/test-strncasecmp.c: Likewise.
* string/test-strncat.c: Likewise.
* string/test-strncmp.c: Likewise.
* string/test-strncpy.c: Likewise.
* string/test-strnlen.c: Likewise.
* string/test-strpbrk.c: Likewise.
* string/test-strrchr.c: Likewise.
* string/test-strspn.c: Likewise.
* string/test-strstr.c: Likewise.
* string/tst-bswap.c: Likewise.
* string/tst-cmp.c: Likewise.
* string/tst-endian.c: Likewise.
* string/tst-inlcall.c: Likewise.
* string/tst-strcoll-overflow.c: Likewise.
* string/tst-strfry.c: Likewise.
* string/tst-strlen.c: Likewise.
* string/tst-strtok.c: Likewise.
* string/tst-strtok_r.c: Likewise.
* string/tst-strxfrm.c: Likewise.
* string/tst-strxfrm2.c: Likewise.
* string/tst-svc.c: Likewise.
* string/tst-svc2.c: Likewise.
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This patch provides optimized versions of strnlen and wcsnlen with the z13
vector instructions.
ChangeLog:
* sysdeps/s390/multiarch/strnlen-c.c: New File.
* sysdeps/s390/multiarch/strnlen-vx.S: Likewise.
* sysdeps/s390/multiarch/strnlen.c: Likewise.
* sysdeps/s390/multiarch/wcsnlen-c.c: Likewise.
* sysdeps/s390/multiarch/wcsnlen-vx.S: Likewise.
* sysdeps/s390/multiarch/wcsnlen.c: Likewise.
* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strnlen and
wcsnlen functions.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Add ifunc test for strnlen, wcsnlen.
* wcsmbs/wcsnlen.c: Use WCSNLEN if defined.
* string/test-strnlen.c: Add wcsnlen support.
* wcsmbs/test-wcsnlen.c: New File.
* wcsmbs/Makefile (strop-tests): Add wcsnlen.
* benchtests/bench-strnlen.c: Add wcsnlen support.
* benchtests/bench-wcsnlen.c: New File.
* benchtests/Makefile (wcsmbs-bench): Add wcsnlen.
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While at it, beef up the test suite for strnlen and add performance
tests for it, too.
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