From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-il1-x131.google.com (mail-il1-x131.google.com [IPv6:2607:f8b0:4864:20::131]) by sourceware.org (Postfix) with ESMTPS id 95A753858C83 for ; Mon, 25 Apr 2022 15:58:21 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 95A753858C83 Received: by mail-il1-x131.google.com with SMTP id y11so9629040ilp.4 for ; Mon, 25 Apr 2022 08:58:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=3Pvgt2ZLk5m/tmc9J2reTrbqFmOteW/H0XHoLQFsm9I=; b=3cjRLtqpPeSGn5Sd66m2mbvbMvC+z37txGOWmW4JFvheKVs3q9hJi+SjFEvFZvbIEV mnwDZuiDGhHbAZvi/RdsEkFiXB7fwvUW0dyT9kxQsPvon+a2k9Mb8EdYNahgqwdHrml7 LMfQh0Er+Sg294tBqcIFj/OKVhbnD1v25NgneF2fAokoLGWK+PN1/1Mi8ma+F5DB4TbE Jl5ZbfJ3po9an2HIxbfHXBHNqDtv4dZfyl6cPa9z1HJsDQDCl/w1+igxqVODbEy88oQI CKCY3FqtneKTFk8DZ89XTQ6cvhlEyQtrIBJcFOIW4lxB/puVAJ3+SP3dAVS5dfCMaQLw tU/w== X-Gm-Message-State: AOAM530FEhmsN2+2UZmm9aylwsLvC7JMp4BhTzOhRlafXZiPJDBN6jLX HNfxJcx6Tj3Wyws88oQeE9m34NoHC78= X-Google-Smtp-Source: ABdhPJwslrQp/NF/l5Jh5JAZiiqR4/yHvmjAUg9aDGAkVS35ERmcqZGd+lCc5TFFlpJfhBtU/CFLhg== X-Received: by 2002:a05:6e02:1c0e:b0:2cc:37f3:6221 with SMTP id l14-20020a056e021c0e00b002cc37f36221mr7765795ilh.136.1650902300704; Mon, 25 Apr 2022 08:58:20 -0700 (PDT) Received: from localhost.localdomain ([173.245.202.37]) by smtp.googlemail.com with ESMTPSA id d3-20020a056e020c0300b002c7b42b4b0esm6519897ile.65.2022.04.25.08.58.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Apr 2022 08:58:20 -0700 (PDT) From: Noah Goldstein To: libc-alpha@sourceware.org Subject: [PATCH v3 2/6] elf: Add tests for the dl hash funcs (_dl_new_hash and _dl_elf_hash) Date: Mon, 25 Apr 2022 10:58:10 -0500 Message-Id: <20220425155814.3558359-2-goldstein.w.n@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220425155814.3558359-1-goldstein.w.n@gmail.com> References: <20220414041231.926415-1-goldstein.w.n@gmail.com> <20220425155814.3558359-1-goldstein.w.n@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-11.9 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 25 Apr 2022 15:58:23 -0000 If we want to further optimize the functions tests are needed. --- elf/Makefile | 1 + elf/tst-dl-hash.c | 147 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 148 insertions(+) create mode 100644 elf/tst-dl-hash.c diff --git a/elf/Makefile b/elf/Makefile index 8ed6c3b0b1..493409715e 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -309,6 +309,7 @@ tests := \ tst-array4 \ tst-array5 \ tst-auxv \ + tst-dl-hash \ tst-leaks1 \ tst-stringtable \ tst-tls9 \ diff --git a/elf/tst-dl-hash.c b/elf/tst-dl-hash.c new file mode 100644 index 0000000000..7cbc14b46d --- /dev/null +++ b/elf/tst-dl-hash.c @@ -0,0 +1,147 @@ +/* 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 + . */ +/* Simple implementation of ELF ABI hash function. */ + +#include +#include +#include +#include +#include +#include + +typedef unsigned int (*hash_f) (const char *); + +static unsigned int +simple_dl_new_hash (const char *s) +{ + uint32_t h = 5381; + for (unsigned char c = *s; c != '\0'; c = *++s) + h = h * 33 + c; + return h; +} + +static unsigned int +simple_dl_elf_hash (const char *name_arg) +{ + unsigned long int hash = 0; + for (unsigned char c = *name_arg; c != '\0'; c = *(++name_arg)) + { + unsigned long int hi; + hash = (hash << 4) + c; + hi = hash & 0xf0000000; + hash ^= hi >> 24; + hash &= 0x0fffffff; + } + return hash; +} + +static int +do_fill_test (size_t len, int fill, const char *name, hash_f testf, + hash_f expecf) +{ + uint32_t expec, res; + char buf[len + 1]; + memset (buf, fill, len); + buf[len] = '\0'; + + expec = expecf (buf); + res = testf (buf); + if (expec != res) + { + printf ("FAIL: fill(%d) %s(%zu), %x != %x\n", fill, name, len, expec, + res); + return 1; + } + + return 0; +} + +static int +do_fill_tests (size_t len, int fill) +{ + if (do_fill_test (len, fill, "dl_new_hash", &_dl_new_hash, + &simple_dl_new_hash)) + { + return 1; + } + return do_fill_test (len, fill, "dl_elf_hash", &_dl_elf_hash, + &simple_dl_elf_hash); +} + +static int +do_rand_test (size_t len, const char *name, hash_f testf, hash_f expecf) +{ + uint32_t expec, res; + size_t i; + char buf[len + 1]; + char v; + for (i = 0; i < len; ++i) + { + v = random (); + if (v == 0) + { + v = 1; + } + buf[i] = v; + } + buf[len] = '\0'; + + expec = expecf (buf); + res = testf (buf); + if (expec != res) + { + printf ("FAIL: random %s(%zu), %x != %x\n", name, len, expec, res); + return 1; + } + + return 0; +} + +static int +do_rand_tests (size_t len) +{ + if (do_rand_test (len, "dl_new_hash", &_dl_new_hash, &simple_dl_new_hash)) + { + return 1; + } + return do_rand_test (len, "dl_elf_hash", &_dl_elf_hash, &simple_dl_elf_hash); +} + +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 -- 2.25.1