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f24c854b28
This change adds tests for the new memory manager code particularly with its windows support. Function call tracing now works reliably on Silicon since our function hooker was missing new Apple self-modifying code APIs Many tests that were disabled a long time ago on aarch64 are reactivated by this change, now that arm support is on equal terms with x86. There's been a lot of places where ftrace could cause deadlocks, which have been hunted down across all platforms thanks to new tests. A bug in Windows's kill() function has been identified.
79 lines
3.8 KiB
C
79 lines
3.8 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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│ vi: set noet ft=c ts=8 sw=8 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2016 Google Inc. │
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│ │
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│ Licensed under the Apache License, Version 2.0 (the "License"); │
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│ you may not use this file except in compliance with the License. │
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│ You may obtain a copy of the License at │
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│ │
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│ http://www.apache.org/licenses/LICENSE-2.0 │
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│ │
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│ Unless required by applicable law or agreed to in writing, software │
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│ distributed under the License is distributed on an "AS IS" BASIS, │
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│ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. │
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│ See the License for the specific language governing permissions and │
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│ limitations under the License. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/errno.h"
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#include "libc/intrin/dll.h"
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#include "libc/runtime/runtime.h"
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#include "third_party/nsync/atomic.h"
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#include "third_party/nsync/atomic.internal.h"
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#include "third_party/nsync/common.internal.h"
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#include "third_party/nsync/mu_semaphore.h"
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#include "third_party/nsync/wait_s.internal.h"
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__static_yoink("nsync_notice");
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/* Wait until one of:
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w->sem is non-zero----decrement it and return 0.
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abs_deadline expires---return ETIMEDOUT.
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cancel_note is non-NULL and *cancel_note becomes notified---return ECANCELED. */
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int nsync_sem_wait_with_cancel_ (waiter *w, int clock, nsync_time abs_deadline,
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nsync_note cancel_note) {
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int sem_outcome;
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if (cancel_note == NULL) {
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sem_outcome = nsync_mu_semaphore_p_with_deadline (&w->sem, clock, abs_deadline);
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} else {
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nsync_time cancel_time;
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cancel_time = nsync_note_notified_deadline_ (cancel_note);
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sem_outcome = ECANCELED;
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if (nsync_time_cmp (cancel_time, nsync_time_zero) > 0) {
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struct nsync_waiter_s nw;
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#if NSYNC_DEBUG
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nw.tag = NSYNC_WAITER_TAG;
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#endif
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nw.sem = &w->sem;
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dll_init (&nw.q);
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ATM_STORE (&nw.waiting, 1);
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nw.flags = 0;
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nsync_mu_lock (&cancel_note->note_mu);
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cancel_time = NOTIFIED_TIME (cancel_note);
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if (nsync_time_cmp (cancel_time, nsync_time_zero) > 0) {
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nsync_time local_abs_deadline;
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int deadline_is_nearer = 0;
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dll_make_last (&cancel_note->waiters, &nw.q);
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local_abs_deadline = cancel_time;
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if (nsync_time_cmp (abs_deadline, cancel_time) < 0) {
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local_abs_deadline = abs_deadline;
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deadline_is_nearer = 1;
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}
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nsync_mu_unlock (&cancel_note->note_mu);
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sem_outcome = nsync_mu_semaphore_p_with_deadline (&w->sem,
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clock, local_abs_deadline);
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if (sem_outcome == ETIMEDOUT && !deadline_is_nearer) {
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sem_outcome = ECANCELED;
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nsync_note_notify (cancel_note);
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}
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nsync_mu_lock (&cancel_note->note_mu);
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cancel_time = NOTIFIED_TIME (cancel_note);
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if (nsync_time_cmp (cancel_time,
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nsync_time_zero) > 0) {
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dll_remove (&cancel_note->waiters, &nw.q);
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}
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}
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nsync_mu_unlock (&cancel_note->note_mu);
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}
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}
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return (sem_outcome);
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}
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