mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
7e0a09feec
This change ports APE Loader to Linux AARCH64, so that Raspberry Pi users can run programs like redbean, without the executable needing to modify itself. Progress has also slipped into this change on the issue of making progress better conforming to user expectations and industry standards regarding which symbols we're allowed to declare
204 lines
7.5 KiB
C
204 lines
7.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/intrin/bits.h"
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#include "libc/mem/mem.h"
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#include "libc/stdio/rand.h"
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#include "libc/str/str.h"
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#include "libc/testlib/ezbench.h"
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#include "libc/testlib/hyperion.h"
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#include "libc/testlib/testlib.h"
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TEST(strchr, blank) {
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const char *const blank = "";
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EXPECT_EQ(NULL, strchr(blank, '#'));
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EXPECT_EQ(blank, strchr(blank, '\0'));
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}
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TEST(strchr, text) {
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char buf[] = "hellothere";
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EXPECT_STREQ("there", strchr(buf, 't'));
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}
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TEST(strchr, testsse) {
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char buf[] = "hellohellohellohellohellohellohellohello"
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"theretheretheretheretheretheretherethere";
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EXPECT_STREQ("theretheretheretheretheretheretherethere", strchr(buf, 't'));
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}
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TEST(rawmemchr, text) {
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char buf[] = "hellothere";
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EXPECT_STREQ("there", rawmemchr(buf, 't'));
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}
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TEST(strchrnul, text) {
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char buf[] = "hellothere";
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EXPECT_STREQ("there", strchrnul(buf, 't'));
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}
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TEST(strchr, nulTerminator) {
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char buf[] = "hellothere";
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EXPECT_STREQ("", strchr(buf, '\0'));
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}
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TEST(rawmemchr, nulTerminator) {
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char buf[] = "hellothere";
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EXPECT_STREQ("", rawmemchr(buf, '\0'));
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}
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TEST(strchrnul, nulTerminator) {
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char buf[] = "hellothere";
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EXPECT_STREQ("", strchrnul(buf, '\0'));
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}
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TEST(strchr, notFound_returnsNul) {
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char buf[] = "hellothere";
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EXPECT_EQ(NULL, strchr(buf, 'z'));
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}
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TEST(strchrnul, notFound_returnsPointerToNulByte) {
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char buf[] = "hi";
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EXPECT_STREQ("", strchrnul(buf, 'z'));
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EXPECT_EQ(&buf[2], strchrnul(buf, 'z'));
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}
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char *strchr_pure(const char *s, int c) {
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char *r;
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for (c &= 0xff;; ++s) {
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if ((*s & 0xff) == c) return (char *)s;
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if (!*s) return NULL;
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}
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}
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TEST(strchr, fuzz) {
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char *p;
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int i, j;
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p = calloc(1, 64);
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for (i = -2; i < 257; ++i) {
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for (j = 0; j < 17; ++j) {
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rngset(p, 63, rdseed, -1);
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ASSERT_EQ(strchr_pure(p + j, i), strchr(p + j, i));
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}
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}
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free(p);
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}
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BENCH(strchr, bench) {
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EZBENCH2("strchr 0", donothing, __expropriate(strchr(__veil("r", ""), 0)));
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EZBENCH2("strchr 5", donothing,
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__expropriate(strchr(__veil("r", "hello"), 'o')));
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EZBENCH2("strchr 8", donothing,
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__expropriate(strchr(__veil("r", "hellzzzo"), 'o')));
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EZBENCH2("strchr 17", donothing,
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__expropriate(strchr(__veil("r", "hellzzzhellzzzeeo"), 'o')));
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EZBENCH2("strchr 34", donothing,
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__expropriate(
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strchr(__veil("r", "hellzzzhellzzzeeAhellzzzhellzzzeeo"), 'o')));
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}
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char *memchr_pure(const char *m, int c, size_t n) {
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const unsigned char *p, *pe;
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for (c &= 0xff, p = (const unsigned char *)m, pe = p + n; p < pe; ++p) {
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if (*p == c) return p;
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}
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return NULL;
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}
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TEST(memchr, fuzz) {
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char *p;
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int i, j;
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p = malloc(64);
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for (i = -2; i < 257; ++i) {
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for (j = 0; j < 17; ++j) {
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rngset(p, 64, _rand64, -1);
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ASSERT_EQ(memchr(p + j, i, 64 - j), memchr_pure(p + j, i, 64 - j));
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}
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}
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free(p);
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}
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char *strchrnul_pure(const char *s, int c) {
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char *r;
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for (c &= 0xff;; ++s) {
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if ((*s & 0xff) == c) return (char *)s;
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if (!*s) return s;
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}
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}
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TEST(strchrnul, fuzz) {
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char *p;
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int i, j;
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p = calloc(1, 64);
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for (i = -2; i < 257; ++i) {
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for (j = 0; j < 17; ++j) {
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rngset(p, 63, _rand64, -1);
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ASSERT_EQ(strchrnul(p + j, i), strchrnul_pure(p + j, i));
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}
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}
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free(p);
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}
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void *rawmemchr_pure(const void *m, int c) {
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const unsigned char *s;
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for (c &= 255, s = m;; ++s) {
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if (*s == c) return s;
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}
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}
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TEST(rawmemchr, fuzz) {
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char *p;
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int i, j;
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p = malloc(64);
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for (i = -2; i < 257; ++i) {
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for (j = 0; j < 17; ++j) {
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rngset(p, 63, _rand64, -1);
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p[63] = i;
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ASSERT_EQ(rawmemchr(p + j, i), rawmemchr_pure(p + j, i));
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}
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}
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free(p);
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}
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/*
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* strchr 0 l: 10c 3ns m: 38c 12ns
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* strchr 5 l: 13c 4ns m: 42c 14ns
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* strchr 8 l: 14c 5ns m: 44c 14ns
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* strchr 17 l: 13c 4ns m: 45c 15ns
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* strchr 34 l: 16c 5ns m: 48c 16ns
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* strchr z l: 369c 119ns m: 408c 132ns
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* rawmemchr z l: 236c 76ns m: 391c 126ns
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* memchr z l: 357c 115ns m: 423c 137ns
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* strchr Z l: 1,872c 605ns m: 1,911c 617ns
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* rawmemchr \0 l: 1,184c 382ns m: 1,880c 607ns
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* strlen l: 1,174c 379ns m: 1,237c 400ns
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* memchr Z l: 1,866c 603ns m: 1,945c 628ns
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* strchrnul z l: 365c 118ns m: 408c 132ns
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* strchrnul Z l: 1,871c 604ns m: 1,914c 618ns
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*/
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BENCH(strchr, bench2) {
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char *strchr_(const char *, int) asm("strchr");
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char *strchrnul_(const char *, int) asm("strchrnul");
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char *memchr_(const char *, int, size_t) asm("memchr");
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char *strlen_(const char *) asm("strlen");
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char *rawmemchr_(const char *, int) asm("rawmemchr");
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EZBENCH2("strchr z", donothing, strchr_(kHyperion, 'z'));
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EZBENCH2("strchr Z", donothing, strchr_(kHyperion, 'Z'));
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EZBENCH2("memchr z", donothing, memchr_(kHyperion, 'z', kHyperionSize));
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EZBENCH2("memchr Z", donothing, memchr_(kHyperion, 'Z', kHyperionSize));
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EZBENCH2("rawmemchr z", donothing, rawmemchr_(kHyperion, 'z'));
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EZBENCH2("rawmemchr Z", donothing, rawmemchr_(kHyperion, 'z'));
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EZBENCH2("rawmemchr \\0", donothing, rawmemchr_(kHyperion, 0));
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EZBENCH2("strlen", donothing, strlen_(kHyperion));
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EZBENCH2("memchr Z", donothing, memchr_(kHyperion, 'Z', kHyperionSize));
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EZBENCH2("strchrnul z", donothing, strchrnul_(kHyperion, 'z'));
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EZBENCH2("strchrnul Z", donothing, strchrnul_(kHyperion, 'Z'));
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}
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