diff options
Diffstat (limited to 'nss')
| -rw-r--r-- | nss/Makefile | 1 | ||||
| -rw-r--r-- | nss/nss_hash.c | 1 | ||||
| -rw-r--r-- | nss/simple-nss-hash.h | 42 | ||||
| -rw-r--r-- | nss/tst-nss-hash.c | 80 |
4 files changed, 124 insertions, 0 deletions
diff --git a/nss/Makefile b/nss/Makefile index d8b06b44fb..a978e3927a 100644 --- a/nss/Makefile +++ b/nss/Makefile @@ -62,6 +62,7 @@ tests := \ test-digits-dots \ test-netdb \ tst-nss-getpwent \ + tst-nss-hash \ tst-nss-test1 \ tst-nss-test2 \ tst-nss-test4 \ diff --git a/nss/nss_hash.c b/nss/nss_hash.c index 27a348ea9b..3d8e4cf37e 100644 --- a/nss/nss_hash.c +++ b/nss/nss_hash.c @@ -75,4 +75,5 @@ __nss_hash (const void *keyarg, size_t len) return h; } + libc_hidden_def (__nss_hash) diff --git a/nss/simple-nss-hash.h b/nss/simple-nss-hash.h new file mode 100644 index 0000000000..47708972e7 --- /dev/null +++ b/nss/simple-nss-hash.h @@ -0,0 +1,42 @@ +/* __simple_nss_hash for testing nss_hash function + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#ifndef _SIMPLE_NSS_HASH_H +#define _SIMPLE_NSS_HASH_H 1 + +#include <stdint.h> + +/* For testing/benchmarking purposes. Real implementation in + nss/nss_hash.c. */ +static uint32_t +__attribute__ ((unused)) +__simple_nss_hash (const void *keyarg, size_t len) +{ + const unsigned char *key; + size_t i; + uint32_t h = 0; + key = keyarg; + + for (i = 0; i < len; ++i) + h = *key++ + 65599 * h; + + return h; +} + + +#endif /* simple-nss-hash.h */ diff --git a/nss/tst-nss-hash.c b/nss/tst-nss-hash.c new file mode 100644 index 0000000000..5ec1f9b0c5 --- /dev/null +++ b/nss/tst-nss-hash.c @@ -0,0 +1,80 @@ +/* Test __nss_hash + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <support/support.h> +#include <support/check.h> +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <nss.h> +#include <simple-nss-hash.h> + +uint32_t __nss_hash (const void *__key, size_t __length); + +static int +do_fill_tests (size_t len, int fill) +{ + uint32_t expec, res; + char buf[len]; + memset (buf, fill, len); + + expec = __simple_nss_hash (buf, len); + res = __nss_hash (buf, len); + if (expec != res) + FAIL_EXIT1 ("FAIL: fill(%d) (%zu), %x != %x\n", fill, len, expec, res); + + return 0; +} + +static int +do_rand_tests (size_t len) +{ + uint32_t expec, res; + size_t i; + char buf[len]; + for (i = 0; i < len; ++i) + buf[i] = random (); + + expec = __simple_nss_hash (buf, len); + res = __nss_hash (buf, len); + if (expec != res) + FAIL_EXIT1 ("FAIL: random (%zu), %x != %x\n", len, expec, res); + + return 0; +} + +static int +do_test (void) +{ + size_t i, j; + for (i = 0; i < 100; ++i) + { + for (j = 0; j < 8192; ++j) + { + if (do_rand_tests (i)) + return 1; + + if (do_fill_tests (i, -1) || do_fill_tests (i, 1) + || do_fill_tests (i, 0x80) || do_fill_tests (i, 0x88)) + return 1; + } + } + return 0; +} + +#include <support/test-driver.c> |