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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.
107 lines
4.3 KiB
C
107 lines
4.3 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/calls/blockcancel.internal.h"
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#include "libc/mem/mem.h"
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#include "libc/thread/thread.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/races.internal.h"
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#include "third_party/nsync/wait_s.internal.h"
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#include "third_party/nsync/waiter.h"
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__static_yoink("nsync_notice");
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int nsync_wait_n (void *mu, void (*lock) (void *), void (*unlock) (void *),
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int clock, nsync_time abs_deadline,
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int count, struct nsync_waitable_s *waitable[]) {
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int ready;
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IGNORE_RACES_START ();
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BLOCK_CANCELATION;
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for (ready = 0; ready != count &&
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nsync_time_cmp ((*waitable[ready]->funcs->ready_time) (
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waitable[ready]->v, NULL),
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nsync_time_zero) > 0;
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ready++) {
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}
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if (ready == count && nsync_time_cmp (abs_deadline, nsync_time_zero) > 0) {
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int i;
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int unlocked = 0;
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int j;
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int enqueued = 1;
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waiter *w = nsync_waiter_new_ ();
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struct nsync_waiter_s nw_set[4];
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struct nsync_waiter_s *nw = nw_set;
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if (count > (int) (sizeof (nw_set) / sizeof (nw_set[0]))) {
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nw = (struct nsync_waiter_s *) malloc (count * sizeof (nw[0]));
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}
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for (i = 0; i != count && enqueued; i++) {
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#if NSYNC_DEBUG
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nw[i].tag = NSYNC_WAITER_TAG;
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#endif
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nw[i].sem = &w->sem;
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dll_init (&nw[i].q);
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ATM_STORE (&nw[i].waiting, 0);
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nw[i].flags = 0;
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enqueued = (*waitable[i]->funcs->enqueue) (waitable[i]->v, &nw[i]);
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}
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if (i == count) {
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nsync_time min_ntime;
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if (mu != NULL) {
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(*unlock) (mu);
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unlocked = 1;
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}
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do {
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min_ntime = abs_deadline;
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for (j = 0; j != count; j++) {
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nsync_time ntime;
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ntime = (*waitable[j]->funcs->ready_time) (
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waitable[j]->v, &nw[j]);
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if (nsync_time_cmp (ntime, min_ntime) < 0) {
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min_ntime = ntime;
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}
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}
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} while (nsync_time_cmp (min_ntime, nsync_time_zero) > 0 &&
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nsync_mu_semaphore_p_with_deadline (&w->sem,
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clock, min_ntime) == 0);
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}
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/* An attempt was made above to enqueue waitable[0..i-1].
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Dequeue any that are still enqueued, and remember the index
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of the first ready (i.e., not still enqueued) object, if any. */
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for (j = 0; j != i; j++) {
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int was_still_enqueued =
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(*waitable[j]->funcs->dequeue) (waitable[j]->v, &nw[j]);
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if (!was_still_enqueued && ready == count) {
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ready = j;
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}
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}
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if (nw != nw_set) {
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free (nw);
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}
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nsync_waiter_free_ (w);
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if (unlocked) {
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(*lock) (mu);
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}
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}
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ALLOW_CANCELATION;
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IGNORE_RACES_END ();
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return (ready);
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}
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