mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-08 14:42:40 +00:00
b407327972
- clock_nanosleep() is now much faster on OpenBSD and NetBSD - Thread joining is now much faster on NetBSD - FreeBSD timestamps are now more accurate - Thread spawning now goes faster on XNU - Clean up the clone() code
99 lines
3.9 KiB
C
99 lines
3.9 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 2022 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/atomic.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/sigaction.h"
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#include "libc/calls/struct/sigset.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/macros.internal.h"
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#include "libc/mem/gc.h"
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#include "libc/mem/mem.h"
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#include "libc/runtime/runtime.h"
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#include "libc/stdio/rand.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/tab.internal.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/testlib/testlib.h"
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#include "libc/thread/thread.h"
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// TODO(jart): Why can EINTR happen on Windows?
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atomic_int done;
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atomic_int ready;
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pthread_t parent;
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atomic_int gotsome;
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void OnSig(int sig) {
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++gotsome;
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}
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void *TortureWorker(void *arg) {
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sigset_t ss;
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sigfillset(&ss);
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ASSERT_SYS(0, 0, sigprocmask(SIG_SETMASK, &ss, 0));
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ready = true;
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while (!done) {
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if (!IsWindows()) pthread_kill(parent, SIGUSR1);
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usleep(1);
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if (!IsWindows()) pthread_kill(parent, SIGUSR2);
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usleep(1);
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}
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return 0;
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}
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TEST(getentropy, test) {
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pthread_t child;
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double e, w = 7.7;
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struct sigaction sa;
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int i, j, k, m, n = 999;
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char *buf = _gc(calloc(1, n));
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sa.sa_flags = 0;
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sa.sa_handler = OnSig;
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sigemptyset(&sa.sa_mask);
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ASSERT_SYS(0, 0, sigaction(SIGUSR1, &sa, 0));
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ASSERT_SYS(0, 0, sigaction(SIGUSR2, &sa, 0));
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parent = pthread_self();
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ASSERT_EQ(0, pthread_create(&child, 0, TortureWorker, 0));
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while (!ready) pthread_yield();
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for (k = 0; k < 10; ++k) {
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ASSERT_SYS(0, 0, getentropy(0, 0));
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for (i = 0; i < n; i += m) {
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m = MIN(n - i, 256);
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ASSERT_SYS(0, 0, getentropy(buf + i, m));
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ASSERT_SYS(EFAULT, -1, getentropy(0, m));
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}
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if ((e = MeasureEntropy(buf, n)) < w) {
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fprintf(stderr, "error: entropy suspect! got %g but want >=%g\n", e, w);
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for (i = 0; i < n;) {
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if (!(i % 16)) fprintf(stderr, "%6x ", i);
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fprintf(stderr, "%lc", kCp437[buf[i] & 255]);
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if (!(++i % 16)) fprintf(stderr, "\n");
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}
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fprintf(stderr, "\n");
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done = true;
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pthread_join(child, 0);
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exit(1);
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}
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}
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done = true;
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ASSERT_EQ(0, pthread_join(child, 0));
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if (!IsWindows()) ASSERT_GT(gotsome, 0);
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}
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