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111 lines
2.3 KiB
111 lines
2.3 KiB
/*
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* memchr test.
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*
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* Copyright (c) 2019-2020, Arm Limited.
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* SPDX-License-Identifier: MIT
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include "mte.h"
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#include "stringlib.h"
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#include "stringtest.h"
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#define F(x, mte) {#x, x, mte},
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static const struct fun
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{
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const char *name;
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void *(*fun) (const void *s, int c, size_t n);
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int test_mte;
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} funtab[] = {
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// clang-format off
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F(memchr, 0)
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#if __aarch64__
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F(__memchr_aarch64, 0)
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F(__memchr_aarch64_mte, 1)
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# if __ARM_FEATURE_SVE
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F(__memchr_aarch64_sve, 1)
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# endif
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#elif __arm__
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F(__memchr_arm, 0)
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#endif
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{0, 0, 0}
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// clang-format on
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};
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#undef F
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#define ALIGN 32
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#define LEN 512
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static char *sbuf;
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static void *
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alignup (void *p)
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{
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return (void *) (((uintptr_t) p + ALIGN - 1) & -ALIGN);
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}
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static void
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test (const struct fun *fun, int align, size_t seekpos, size_t len,
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size_t maxlen)
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{
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char *src = alignup (sbuf);
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char *s = src + align;
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char *f = seekpos < maxlen ? s + seekpos : NULL;
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int seekchar = 1;
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void *p;
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if (err_count >= ERR_LIMIT)
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return;
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if (len > LEN || seekpos > LEN || align > ALIGN)
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abort ();
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for (int i = 0; src + i < s; i++)
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src[i] = seekchar;
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for (int i = 0; i <= ALIGN; i++)
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s[len + i] = seekchar;
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for (int i = 0; i < len; i++)
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s[i] = 'a' + (i & 31);
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s[seekpos] = seekchar;
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s[((len ^ align) & 1) ? seekpos + 1 : len] = seekchar;
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int mte_len = seekpos != -1 ? seekpos + 1 : maxlen;
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s = tag_buffer (s, mte_len, fun->test_mte);
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p = fun->fun (s, seekchar, maxlen);
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untag_buffer (s, mte_len, fun->test_mte);
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p = untag_pointer (p);
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if (p != f)
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{
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ERR ("%s (%p, 0x%02x, %zu) returned %p, expected %p\n", fun->name, s,
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seekchar, maxlen, p, f);
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quote ("input", s, len);
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}
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}
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int
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main (void)
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{
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sbuf = mte_mmap (LEN + 3 * ALIGN);
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int r = 0;
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for (int i = 0; funtab[i].name; i++)
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{
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err_count = 0;
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for (int a = 0; a < ALIGN; a++)
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for (int n = 0; n < LEN; n++)
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{
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for (int sp = 0; sp < LEN; sp++)
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test (funtab + i, a, sp, n, n);
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test (funtab + i, a, n, n, SIZE_MAX - a);
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}
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char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
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printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
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if (err_count)
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r = -1;
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}
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return r;
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}
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