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Get threads working on all platforms

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We now have a high-quality clone() implementation for creating
lightweight threads on Linux/Windows/FreeBSD/NetBSD/OpenBSD.
This commit is contained in:
Justine Tunney 2022-05-12 17:52:13 -07:00
parent 4e62cefa6e
commit fec396037a
43 changed files with 850 additions and 532 deletions
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60
test/libc/thread/clone_test.c
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@ -1,60 +0,0 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/dce.h"
#include "libc/intrin/spinlock.h"
#include "libc/sysv/consts/clone.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/prot.h"
#include "libc/testlib/testlib.h"
int x, thechilde;
_Alignas(64) volatile char lock;
void SetUp(void) {
x = 0;
lock = 0;
thechilde = 0;
}
int thread(void *arg) {
x = 42;
ASSERT_EQ(23, (intptr_t)arg);
thechilde = gettid();
_spunlock(&lock);
return 0;
}
TEST(clone, test) {
if (IsXnu()) return;
int me, tid;
char *stack;
me = gettid();
_spinlock(&lock);
stack = mmap(0, FRAMESIZE, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
ASSERT_NE(-1, (tid = clone(thread, stack, FRAMESIZE,
CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND,
(void *)23, 0, 0, 0, 0)));
_spinlock(&lock);
ASSERT_EQ(42, x);
ASSERT_NE(me, tid);
ASSERT_EQ(tid, thechilde);
EXPECT_SYS(0, 0, munmap(stack, FRAMESIZE));
}