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126 lines
2.8 KiB
126 lines
2.8 KiB
/*
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* memcmp 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 "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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int (*fun) (const void *s1, const void *s2, 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(memcmp, 0)
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#if __aarch64__
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F(__memcmp_aarch64, 1)
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# if __ARM_FEATURE_SVE
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F(__memcmp_aarch64_sve, 1)
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# endif
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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 A 32
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#define LEN 250000
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static unsigned char *s1buf;
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static unsigned char *s2buf;
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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 + A - 1) & -A);
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}
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static void
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test (const struct fun *fun, int s1align, int s2align, int len, int diffpos,
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int delta)
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{
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unsigned char *src1 = alignup (s1buf);
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unsigned char *src2 = alignup (s2buf);
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unsigned char *s1 = src1 + s1align;
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unsigned char *s2 = src2 + s2align;
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int r;
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if (err_count >= ERR_LIMIT)
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return;
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if (len > LEN || s1align >= A || s2align >= A)
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abort ();
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if (diffpos >= len)
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abort ();
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if ((diffpos < 0) != (delta == 0))
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abort ();
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for (int i = 0; i < len + A; i++)
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src1[i] = src2[i] = '?';
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for (int i = 0; i < len; i++)
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s1[i] = s2[i] = 'a' + i % 23;
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if (delta)
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s1[diffpos] += delta;
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s1 = tag_buffer (s1, len, fun->test_mte);
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s2 = tag_buffer (s2, len, fun->test_mte);
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r = fun->fun (s1, s2, len);
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untag_buffer (s1, len, fun->test_mte);
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untag_buffer (s2, len, fun->test_mte);
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if ((delta == 0 && r != 0) || (delta > 0 && r <= 0) || (delta < 0 && r >= 0))
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{
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ERR ("%s(align %d, align %d, %d) failed, returned %d\n", fun->name,
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s1align, s2align, len, r);
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quoteat ("src1", src1, len + A, diffpos);
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quoteat ("src2", src2, len + A, diffpos);
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}
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}
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int
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main ()
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{
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s1buf = mte_mmap (LEN + 2 * A);
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s2buf = mte_mmap (LEN + 2 * A);
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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 d = 0; d < A; d++)
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for (int s = 0; s < A; s++)
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{
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int n;
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test (funtab + i, d, s, 0, -1, 0);
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test (funtab + i, d, s, 1, -1, 0);
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test (funtab + i, d, s, 1, 0, -1);
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test (funtab + i, d, s, 1, 0, 1);
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for (n = 2; n < 100; n++)
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{
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test (funtab + i, d, s, n, -1, 0);
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test (funtab + i, d, s, n, 0, -1);
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test (funtab + i, d, s, n, n - 1, -1);
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test (funtab + i, d, s, n, n / 2, 1);
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}
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for (; n < LEN; n *= 2)
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{
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test (funtab + i, d, s, n, -1, 0);
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test (funtab + i, d, s, n, n / 2, -1);
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}
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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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