mirror of
https://github.com/jart/cosmopolitan.git
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121 lines
4.4 KiB
C
121 lines
4.4 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/calls/calls.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/intrin/spinlock.h"
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#include "libc/mem/mem.h"
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#include "libc/nexgen32e/nexgen32e.h"
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#include "libc/nexgen32e/threaded.h"
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#include "libc/runtime/stack.h"
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#include "libc/sysv/consts/clone.h"
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#include "libc/sysv/consts/map.h"
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#include "libc/sysv/consts/prot.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/testlib/ezbench.h"
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#include "libc/testlib/testlib.h"
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#include "libc/time/time.h"
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char *stack, *tls;
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int x, me, tid, thechilde;
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_Alignas(64) volatile char lock;
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void SetUp(void) {
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x = 0;
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lock = 0;
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me = gettid();
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thechilde = 0;
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tls = calloc(1, 64);
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__initialize_tls(tls);
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*(int *)(tls + 0x3c) = 31337;
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ASSERT_NE(MAP_FAILED, (stack = mmap(0, GetStackSize(), PROT_READ | PROT_WRITE,
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MAP_STACK | MAP_ANONYMOUS, -1, 0)));
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}
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void TearDown(void) {
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free(tls);
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}
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int CloneTest1(void *arg) {
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_checkstackalign();
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x = 42;
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if (!IsWindows()) {
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ASSERT_EQ(31337, errno);
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} else {
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errno = 31337;
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ASSERT_EQ(31337, errno);
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}
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ASSERT_EQ(23, (intptr_t)arg);
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thechilde = gettid();
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ASSERT_NE(gettid(), getpid());
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_spunlock(&lock);
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return 0;
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}
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int DoNothing(void *arg) {
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_checkstackalign();
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return 0;
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}
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TEST(clone, test1) {
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_spinlock(&lock);
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ASSERT_NE(-1, (tid = clone(CloneTest1, stack, GetStackSize(),
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CLONE_THREAD | CLONE_VM | CLONE_FS | CLONE_FILES |
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CLONE_SIGHAND | CLONE_SETTLS,
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(void *)23, 0, tls, 64, 0)));
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_spinlock(&lock);
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ASSERT_EQ(42, x);
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ASSERT_NE(me, tid);
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ASSERT_EQ(tid, thechilde);
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ASSERT_EQ(0, errno);
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errno = 31337;
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ASSERT_EQ(31337, errno);
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errno = 0;
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}
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int CloneTestSys(void *arg) {
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_checkstackalign();
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thechilde = gettid();
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ASSERT_EQ(31337, errno);
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open(0, 0);
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ASSERT_EQ(EFAULT, errno);
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_spunlock(&lock);
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return 0;
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}
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TEST(clone, tlsSystemCallsErrno_wontClobberMainThreadBecauseTls) {
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ASSERT_EQ(0, errno);
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ASSERT_EQ(31337, *(int *)(tls + 0x3c));
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_spinlock(&lock);
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ASSERT_NE(-1, (tid = clone(CloneTestSys, stack, GetStackSize(),
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CLONE_THREAD | CLONE_VM | CLONE_FS | CLONE_FILES |
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CLONE_SIGHAND | CLONE_SETTLS,
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(void *)23, 0, tls, 64, 0)));
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_spinlock(&lock);
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ASSERT_EQ(0, errno);
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ASSERT_EQ(EFAULT, *(int *)(tls + 0x3c));
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}
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BENCH(clone, bench) {
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errno_t *volatile ep;
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char *volatile tp;
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EZBENCH2("__errno_location", donothing, (ep = (__errno_location())));
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EZBENCH2("__get_tls", donothing, (tp = __get_tls()));
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}
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