mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
d5312b60f7
This change makes pthread_mutex_lock() as fast as _spinlock() by default. Thread instability issues on NetBSD have been resolved. Improvements made to gdtoa thread code. Crash reporting will now synchronize between threads in a slightly better way.
353 lines
15 KiB
C
353 lines
15 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 2021 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/mem/mem.h"
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#include "libc/rand/rand.h"
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#include "libc/runtime/gc.internal.h"
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#include "libc/stdio/stdio.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/fastrandomstring.h"
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#include "libc/testlib/hyperion.h"
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#include "libc/testlib/testlib.h"
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int golden(const void *p, const void *q, size_t n) {
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int c;
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size_t i;
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for (i = 0; i < n; ++i) {
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if ((c = ((const unsigned char *)p)[i] - ((const unsigned char *)q)[i])) {
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return c;
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}
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}
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return 0;
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}
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TEST(memcmp, test) {
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EXPECT_EQ(0, memcmp("hi", "hi", 2));
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EXPECT_NE(0, memcmp("hi", "HI", 2));
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EXPECT_EQ(-1, memcmp("a", "b", 1));
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EXPECT_EQ(+1, memcmp("b", "a", 1));
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}
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TEST(memcmp, hug) {
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int i, j, g;
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char a[128] = {0};
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char b[128] = {0};
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for (j = 0; j < 128; ++j) {
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for (i = 0; i < j; ++i) {
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a[i] = 1;
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g = golden(a, b, j);
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ASSERT_EQ(g, memcmp(a, b, j), "i=%d j=%d", i, j);
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ASSERT_EQ(!!g, !!bcmp(a, b, j), "i=%d j=%d", i, j);
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ASSERT_EQ(!!g, !!timingsafe_bcmp(a, b, j), "i=%d", i);
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ASSERT_EQ(MAX(-1, MIN(1, g)), timingsafe_memcmp(a, b, j), "i=%d", i);
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a[i] = 0;
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}
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}
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}
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TEST(memcmp, fuzz) {
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int i, o, n, g;
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char a[256], b[256];
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for (i = 0; i < 100000; ++i) {
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rngset(a, sizeof(a), rand64, -1);
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memcpy(b, a, sizeof(a));
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if (rand() & 1) {
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a[rand() % sizeof(a)] += rand();
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} else {
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b[rand() % sizeof(a)] += rand();
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}
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if (rand() & 1) {
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a[rand() % sizeof(a)] += rand();
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} else {
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b[rand() % sizeof(a)] += rand();
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}
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o = rand() & 31;
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n = rand() % (sizeof(a) - o);
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g = golden(a + o, b + o, n);
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ASSERT_EQ(g, memcmp(a + o, b + o, n), "n=%d o=%d", n, o);
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ASSERT_EQ(!!g, !!bcmp(a + o, b + o, n), "n=%d o=%d", n, o);
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ASSERT_EQ(!!g, !!timingsafe_bcmp(a + o, b + o, n), "n=%d o=%d", n, o);
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ASSERT_EQ(MAX(-1, MIN(1, g)), timingsafe_memcmp(a + o, b + o, n),
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"n=%d o=%d", n, o);
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}
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}
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int buncmp(const void *, const void *, size_t) asm("bcmp");
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int funcmp(const void *, const void *, size_t) asm("memcmp");
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#if 0
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BENCH(bcmp, bench) {
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volatile int v;
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const char *volatile a;
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const char *volatile b;
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b = a = "123456789123456789123456789123456789123456789123456789";
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b = gc(strdup(b));
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EZBENCH_N("bcmp", 0, v = buncmp(a, b, 0));
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EZBENCH_N("bcmp", 1, v = buncmp(a, b, 1));
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EZBENCH_N("bcmp", 2, v = buncmp(a, b, 2));
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EZBENCH_N("bcmp", 3, v = buncmp(a, b, 3));
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EZBENCH_N("𝗯𝗰𝗺𝗽", 4, v = buncmp(a, b, 4));
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EZBENCH_N("bcmp", 5, v = buncmp(a, b, 5));
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EZBENCH_N("bcmp", 6, v = buncmp(a, b, 6));
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EZBENCH_N("bcmp", 7, v = buncmp(a, b, 7));
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EZBENCH_N("𝗯𝗰𝗺𝗽", 8, v = buncmp(a, b, 8));
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EZBENCH_N("bcmp", 9, v = buncmp(a, b, 9));
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EZBENCH_N("bcmp", 15, v = buncmp(a, b, 15));
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EZBENCH_N("𝗯𝗰𝗺𝗽", 16, v = buncmp(a, b, 16));
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EZBENCH_N("bcmp", 17, v = buncmp(a, b, 17));
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EZBENCH_N("bcmp", 31, v = buncmp(a, b, 31));
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EZBENCH_N("bcmp", 32, v = buncmp(a, b, 32));
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a = kHyperion;
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b = gc(strdup(kHyperion));
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EZBENCH_N("bcmp", 33, v = buncmp(a, b, 33));
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EZBENCH_N("bcmp", 79, v = buncmp(a, b, 79));
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EZBENCH_N("𝗯𝗰𝗺𝗽", 80, v = buncmp(a, b, 80));
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EZBENCH_N("bcmp", 128, v = buncmp(a, b, 128));
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EZBENCH_N("bcmp", 256, v = buncmp(a, b, 256));
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a = gc(malloc(16 * 1024));
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b = gc(malloc(16 * 1024));
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rngset(a, 16 * 1024, lemur64, -1);
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memcpy(b, a, 16 * 1024);
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EZBENCH_N("bcmp", 16384, v = buncmp(a, b, 16384));
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a = gc(malloc(32 * 1024));
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b = gc(malloc(32 * 1024));
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rngset(a, 32 * 1024, lemur64, -1);
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memcpy(b, a, 32 * 1024);
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EZBENCH_N("bcmp", 32768, v = buncmp(a, b, 32768));
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a = gc(malloc(128 * 1024));
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b = gc(malloc(128 * 1024));
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rngset(a, 128 * 1024, lemur64, -1);
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memcpy(b, a, 128 * 1024);
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EZBENCH_N("bcmp", 131072, v = buncmp(a, b, 131072));
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}
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#endif
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#if 0
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BENCH(memcmp, bench) {
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volatile int v;
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const char *volatile a;
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const char *volatile b;
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b = a = "123456789123456789123456789123456789123456789123456789";
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b = gc(strdup(b));
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EZBENCH_N("memcmp", 0, v = funcmp(a, b, 0));
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EZBENCH_N("memcmp", 1, v = funcmp(a, b, 1));
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EZBENCH_N("memcmp", 2, v = funcmp(a, b, 2));
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EZBENCH_N("memcmp", 3, v = funcmp(a, b, 3));
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EZBENCH_N("𝗺𝗲𝗺𝗰𝗺𝗽", 4, v = funcmp(a, b, 4));
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EZBENCH_N("memcmp", 5, v = funcmp(a, b, 5));
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EZBENCH_N("memcmp", 6, v = funcmp(a, b, 6));
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EZBENCH_N("memcmp", 7, v = funcmp(a, b, 7));
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EZBENCH_N("𝗺𝗲𝗺𝗰𝗺𝗽", 8, v = funcmp(a, b, 8));
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EZBENCH_N("memcmp", 9, v = funcmp(a, b, 9));
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EZBENCH_N("memcmp", 15, v = funcmp(a, b, 15));
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EZBENCH_N("𝗺𝗲𝗺𝗰𝗺𝗽", 16, v = funcmp(a, b, 16));
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EZBENCH_N("memcmp", 17, v = funcmp(a, b, 17));
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EZBENCH_N("memcmp", 31, v = funcmp(a, b, 31));
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EZBENCH_N("memcmp", 32, v = funcmp(a, b, 32));
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a = kHyperion;
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b = gc(strdup(kHyperion));
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EZBENCH_N("memcmp", 33, v = funcmp(a, b, 33));
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EZBENCH_N("memcmp", 79, v = funcmp(a, b, 79));
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EZBENCH_N("𝗺𝗲𝗺𝗰𝗺𝗽", 80, v = funcmp(a, b, 80));
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EZBENCH_N("memcmp", 128, v = funcmp(a, b, 128));
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EZBENCH_N("memcmp", 256, v = funcmp(a, b, 256));
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a = gc(malloc(16 * 1024));
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b = gc(malloc(16 * 1024));
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rngset(a, 16 * 1024, lemur64, -1);
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memcpy(b, a, 16 * 1024);
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EZBENCH_N("memcmp", 16384, v = funcmp(a, b, 16384));
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a = gc(malloc(32 * 1024));
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b = gc(malloc(32 * 1024));
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rngset(a, 32 * 1024, lemur64, -1);
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memcpy(b, a, 32 * 1024);
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EZBENCH_N("memcmp", 32768, v = funcmp(a, b, 32768));
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a = gc(malloc(128 * 1024));
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b = gc(malloc(128 * 1024));
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rngset(a, 128 * 1024, lemur64, -1);
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memcpy(b, a, 128 * 1024);
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EZBENCH_N("memcmp", 131072, v = funcmp(a, b, 131072));
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}
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#endif
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#if 0
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BENCH(timingsafe_memcmp, bench) {
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volatile int v;
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const char *volatile a;
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const char *volatile b;
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b = a = "123456789123456789123456789123456789123456789123456789";
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b = gc(strdup(b));
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EZBENCH_N("timingsafe_memcmp", 0, v = timingsafe_memcmp(a, b, 0));
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EZBENCH_N("timingsafe_memcmp", 1, v = timingsafe_memcmp(a, b, 1));
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EZBENCH_N("timingsafe_memcmp", 2, v = timingsafe_memcmp(a, b, 2));
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EZBENCH_N("timingsafe_memcmp", 3, v = timingsafe_memcmp(a, b, 3));
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EZBENCH_N("𝘁𝗶𝗺𝗶𝗻𝗴𝘀𝗮𝗳𝗲_𝗺𝗲𝗺𝗰𝗺𝗽", 4, v = timingsafe_memcmp(a, b, 4));
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EZBENCH_N("timingsafe_memcmp", 5, v = timingsafe_memcmp(a, b, 5));
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EZBENCH_N("timingsafe_memcmp", 6, v = timingsafe_memcmp(a, b, 6));
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EZBENCH_N("timingsafe_memcmp", 7, v = timingsafe_memcmp(a, b, 7));
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EZBENCH_N("𝘁𝗶𝗺𝗶𝗻𝗴𝘀𝗮𝗳𝗲_𝗺𝗲𝗺𝗰𝗺𝗽", 8, v = timingsafe_memcmp(a, b, 8));
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EZBENCH_N("timingsafe_memcmp", 9, v = timingsafe_memcmp(a, b, 9));
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EZBENCH_N("timingsafe_memcmp", 15, v = timingsafe_memcmp(a, b, 15));
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EZBENCH_N("𝘁𝗶𝗺𝗶𝗻𝗴𝘀𝗮𝗳𝗲_𝗺𝗲𝗺𝗰𝗺𝗽", 16, v = timingsafe_memcmp(a, b, 16));
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EZBENCH_N("timingsafe_memcmp", 17, v = timingsafe_memcmp(a, b, 17));
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EZBENCH_N("timingsafe_memcmp", 31, v = timingsafe_memcmp(a, b, 31));
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EZBENCH_N("timingsafe_memcmp", 32, v = timingsafe_memcmp(a, b, 32));
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a = kHyperion;
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b = gc(strdup(kHyperion));
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EZBENCH_N("timingsafe_memcmp", 33, v = timingsafe_memcmp(a, b, 33));
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EZBENCH_N("timingsafe_memcmp", 79, v = timingsafe_memcmp(a, b, 79));
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EZBENCH_N("𝘁𝗶𝗺𝗶𝗻𝗴𝘀𝗮𝗳𝗲_𝗺𝗲𝗺𝗰𝗺𝗽", 80, v = timingsafe_memcmp(a, b, 80));
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EZBENCH_N("timingsafe_memcmp", 128, v = timingsafe_memcmp(a, b, 128));
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EZBENCH_N("timingsafe_memcmp", 256, v = timingsafe_memcmp(a, b, 256));
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a = gc(malloc(16 * 1024));
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b = gc(malloc(16 * 1024));
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rngset(a, 16 * 1024, lemur64, -1);
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memcpy(b, a, 16 * 1024);
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EZBENCH_N("timingsafe_memcmp", 16384, v = timingsafe_memcmp(a, b, 16384));
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a = gc(malloc(32 * 1024));
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b = gc(malloc(32 * 1024));
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rngset(a, 32 * 1024, lemur64, -1);
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memcpy(b, a, 32 * 1024);
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EZBENCH_N("timingsafe_memcmp", 32768, v = timingsafe_memcmp(a, b, 32768));
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a = gc(malloc(128 * 1024));
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b = gc(malloc(128 * 1024));
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rngset(a, 128 * 1024, lemur64, -1);
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memcpy(b, a, 128 * 1024);
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EZBENCH_N("timingsafe_memcmp", 131072, v = timingsafe_memcmp(a, b, 131072));
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}
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#endif
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#if 0
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BENCH(timingsafe_bcmp, bench) {
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volatile int v;
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const char *volatile a;
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const char *volatile b;
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b = a = "123456789123456789123456789123456789123456789123456789";
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b = gc(strdup(b));
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EZBENCH_N("timingsafe_bcmp", 0, v = timingsafe_bcmp(a, b, 0));
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EZBENCH_N("timingsafe_bcmp", 1, v = timingsafe_bcmp(a, b, 1));
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EZBENCH_N("timingsafe_bcmp", 2, v = timingsafe_bcmp(a, b, 2));
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EZBENCH_N("timingsafe_bcmp", 3, v = timingsafe_bcmp(a, b, 3));
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EZBENCH_N("𝘁𝗶𝗺𝗶𝗻𝗴𝘀𝗮𝗳𝗲_𝗯𝗰𝗺𝗽", 4, v = timingsafe_bcmp(a, b, 4));
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EZBENCH_N("timingsafe_bcmp", 5, v = timingsafe_bcmp(a, b, 5));
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EZBENCH_N("timingsafe_bcmp", 6, v = timingsafe_bcmp(a, b, 6));
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EZBENCH_N("timingsafe_bcmp", 7, v = timingsafe_bcmp(a, b, 7));
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EZBENCH_N("𝘁𝗶𝗺𝗶𝗻𝗴𝘀𝗮𝗳𝗲_𝗯𝗰𝗺𝗽", 8, v = timingsafe_bcmp(a, b, 8));
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EZBENCH_N("timingsafe_bcmp", 9, v = timingsafe_bcmp(a, b, 9));
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EZBENCH_N("timingsafe_bcmp", 15, v = timingsafe_bcmp(a, b, 15));
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EZBENCH_N("𝘁𝗶𝗺𝗶𝗻𝗴𝘀𝗮𝗳𝗲_𝗯𝗰𝗺𝗽", 16, v = timingsafe_bcmp(a, b, 16));
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EZBENCH_N("timingsafe_bcmp", 17, v = timingsafe_bcmp(a, b, 17));
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EZBENCH_N("timingsafe_bcmp", 31, v = timingsafe_bcmp(a, b, 31));
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EZBENCH_N("timingsafe_bcmp", 32, v = timingsafe_bcmp(a, b, 32));
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a = kHyperion;
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b = gc(strdup(kHyperion));
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EZBENCH_N("timingsafe_bcmp", 33, v = timingsafe_bcmp(a, b, 33));
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EZBENCH_N("timingsafe_bcmp", 79, v = timingsafe_bcmp(a, b, 79));
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EZBENCH_N("𝘁𝗶𝗺𝗶𝗻𝗴𝘀𝗮𝗳𝗲_𝗯𝗰𝗺𝗽", 80, v = timingsafe_bcmp(a, b, 80));
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EZBENCH_N("timingsafe_bcmp", 128, v = timingsafe_bcmp(a, b, 128));
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EZBENCH_N("timingsafe_bcmp", 256, v = timingsafe_bcmp(a, b, 256));
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a = gc(malloc(16 * 1024));
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b = gc(malloc(16 * 1024));
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rngset(a, 16 * 1024, lemur64, -1);
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memcpy(b, a, 16 * 1024);
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EZBENCH_N("timingsafe_bcmp", 16384, v = timingsafe_bcmp(a, b, 16384));
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a = gc(malloc(32 * 1024));
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b = gc(malloc(32 * 1024));
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rngset(a, 32 * 1024, lemur64, -1);
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memcpy(b, a, 32 * 1024);
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EZBENCH_N("timingsafe_bcmp", 32768, v = timingsafe_bcmp(a, b, 32768));
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a = gc(malloc(128 * 1024));
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b = gc(malloc(128 * 1024));
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rngset(a, 128 * 1024, lemur64, -1);
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memcpy(b, a, 128 * 1024);
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EZBENCH_N("timingsafe_bcmp", 131072, v = timingsafe_bcmp(a, b, 131072));
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}
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#endif
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#if 0
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BENCH(memcasecmp, bench) {
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volatile int v;
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const char *volatile a;
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const char *volatile b;
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b = a = "123456789123456789123456789123456789123456789123456789";
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b = gc(strdup(b));
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EZBENCH_N("memcasecmp", 0, v = memcasecmp(a, b, 0));
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EZBENCH_N("memcasecmp", 1, v = memcasecmp(a, b, 1));
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EZBENCH_N("memcasecmp", 2, v = memcasecmp(a, b, 2));
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EZBENCH_N("memcasecmp", 3, v = memcasecmp(a, b, 3));
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EZBENCH_N("𝗺𝗲𝗺𝗰𝗮𝘀𝗲𝗰𝗺𝗽", 4, v = memcasecmp(a, b, 4));
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EZBENCH_N("memcasecmp", 5, v = memcasecmp(a, b, 5));
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EZBENCH_N("memcasecmp", 6, v = memcasecmp(a, b, 6));
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EZBENCH_N("memcasecmp", 7, v = memcasecmp(a, b, 7));
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EZBENCH_N("𝗺𝗲𝗺𝗰𝗮𝘀𝗲𝗰𝗺𝗽", 8, v = memcasecmp(a, b, 8));
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EZBENCH_N("memcasecmp", 9, v = memcasecmp(a, b, 9));
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EZBENCH_N("memcasecmp", 15, v = memcasecmp(a, b, 15));
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EZBENCH_N("𝗺𝗲𝗺𝗰𝗮𝘀𝗲𝗰𝗺𝗽", 16, v = memcasecmp(a, b, 16));
|
||
EZBENCH_N("memcasecmp", 17, v = memcasecmp(a, b, 17));
|
||
EZBENCH_N("memcasecmp", 31, v = memcasecmp(a, b, 31));
|
||
EZBENCH_N("memcasecmp", 32, v = memcasecmp(a, b, 32));
|
||
a = kHyperion;
|
||
b = gc(strdup(kHyperion));
|
||
EZBENCH_N("memcasecmp", 33, v = memcasecmp(a, b, 33));
|
||
EZBENCH_N("memcasecmp", 79, v = memcasecmp(a, b, 79));
|
||
EZBENCH_N("𝗺𝗲𝗺𝗰𝗮𝘀𝗲𝗰𝗺𝗽", 80, v = memcasecmp(a, b, 80));
|
||
EZBENCH_N("memcasecmp", 128, v = memcasecmp(a, b, 128));
|
||
EZBENCH_N("memcasecmp", 256, v = memcasecmp(a, b, 256));
|
||
a = gc(malloc(16 * 1024));
|
||
b = gc(malloc(16 * 1024));
|
||
rngset(a, 16 * 1024, lemur64, -1);
|
||
memcpy(b, a, 16 * 1024);
|
||
EZBENCH_N("memcasecmp", 16384, v = memcasecmp(a, b, 16384));
|
||
a = gc(malloc(32 * 1024));
|
||
b = gc(malloc(32 * 1024));
|
||
rngset(a, 32 * 1024, lemur64, -1);
|
||
memcpy(b, a, 32 * 1024);
|
||
EZBENCH_N("memcasecmp", 32768, v = memcasecmp(a, b, 32768));
|
||
a = gc(malloc(128 * 1024));
|
||
b = gc(malloc(128 * 1024));
|
||
rngset(a, 128 * 1024, lemur64, -1);
|
||
memcpy(b, a, 128 * 1024);
|
||
EZBENCH_N("memcasecmp", 131072, v = memcasecmp(a, b, 131072));
|
||
}
|
||
#endif
|
||
|
||
#if 0
|
||
BENCH(timingsafe_memcmp, demonstration) {
|
||
int bcmp_(const void *, const void *, size_t) asm("bcmp");
|
||
int memcmp_(const void *, const void *, size_t) asm("memcmp");
|
||
char a[256], b[256];
|
||
rngset(a, 256, lemur64, -1);
|
||
memcpy(b, a, 256);
|
||
++a[0];
|
||
EZBENCH_N("bcmp ne", 256, bcmp_(a, b, 256));
|
||
a[0] = b[0];
|
||
EZBENCH_N("bcmp eq", 256, bcmp_(a, b, 256));
|
||
++a[0];
|
||
EZBENCH_N("memcmp ne", 256, memcmp_(a, b, 256));
|
||
a[0] = b[0];
|
||
EZBENCH_N("memcmp eq", 256, memcmp_(a, b, 256));
|
||
++a[0];
|
||
EZBENCH_N("timingsafe_bcmp ne", 256, timingsafe_bcmp(a, b, 256));
|
||
a[0] = b[0];
|
||
EZBENCH_N("timingsafe_bcmp eq", 256, timingsafe_bcmp(a, b, 256));
|
||
++a[0];
|
||
EZBENCH_N("timingsafe_memcmp ne", 256, timingsafe_memcmp(a, b, 256));
|
||
a[0] = b[0];
|
||
EZBENCH_N("timingsafe_memcmp eq", 256, timingsafe_memcmp(a, b, 256));
|
||
}
|
||
#endif
|