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Improve cancellations, randomness, and time

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- Exhaustively document cancellation points
- Rename SIGCANCEL to SIGTHR just like BSDs
- Further improve POSIX thread cancellations
- Ensure asynchronous cancellations work correctly
- Elevate the quality of getrandom() and getentropy()
- Make futexes cancel correctly on OpenBSD 6.x and 7.x
- Add reboot.com and shutdown.com to examples directory
- Remove underscore prefix from awesome timespec_*() APIs
- Create assertions that help verify our cancellation points
- Remove bad timespec APIs (cmp generalizes eq/ne/gt/gte/lt/lte)
This commit is contained in:
Justine Tunney 2022-11-05 19:49:41 -07:00
parent 0d7c265392
commit 3f0bcdc3ef
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GPG key ID: BE714B4575D6E328
173 changed files with 1599 additions and 782 deletions
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12
test/libc/intrin/lock_test.c
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@ -131,7 +131,7 @@ void TestContendedLock(const char *name, int kind) {
_Exit(1);
}
while (!atomic_load(&ready)) donothing;
t1 = _timespec_real();
t1 = timespec_real();
for (i = 0; i < n; ++i) {
ASSERT_EQ(0, pthread_mutex_lock(&mu));
x = atomic_load_explicit(&counter, memory_order_relaxed);
@ -139,13 +139,13 @@ void TestContendedLock(const char *name, int kind) {
ASSERT_EQ(x - 1, atomic_load_explicit(&counter, memory_order_relaxed));
ASSERT_EQ(0, pthread_mutex_unlock(&mu));
}
t2 = _timespec_real();
t2 = timespec_real();
while (tib.tib_tid) donothing;
ASSERT_EQ(1, atomic_load(&success));
ASSERT_EQ(0, atomic_load(&counter));
_freestack(stk);
ASSERT_EQ(0, pthread_mutex_destroy(&mu));
ns = time2dbl(_timespec_sub(t2, t1)) / n;
ns = time2dbl(timespec_sub(t2, t1)) / n;
kprintf("%s contended took %s\n", name, time2str(ns));
}
@ -159,14 +159,14 @@ void TestUncontendedLock(const char *name, int kind) {
pthread_mutexattr_settype(&attr, kind);
pthread_mutex_init(&lock, &attr);
pthread_mutexattr_destroy(&attr);
t1 = _timespec_real();
t1 = timespec_real();
for (i = 0; i < n; ++i) {
pthread_mutex_lock(&lock);
pthread_mutex_unlock(&lock);
}
t2 = _timespec_real();
t2 = timespec_real();
pthread_mutex_destroy(&lock);
ns = time2dbl(_timespec_sub(t2, t1)) / n;
ns = time2dbl(timespec_sub(t2, t1)) / n;
kprintf("%s took %s\n", name, time2str(ns));
}