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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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7
libc/thread/pthread_atfork.c
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@ -18,6 +18,7 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/errno.h"
#include "libc/intrin/atomic.h"
#include "libc/intrin/kmalloc.h"
#include "libc/runtime/memtrack.internal.h"
#include "libc/str/str.h"
@ -65,8 +66,14 @@ void _pthread_onfork_parent(void) {
}
void _pthread_onfork_child(void) {
struct CosmoTib *tib;
struct PosixThread *pt;
pthread_mutexattr_t attr;
extern pthread_mutex_t __mmi_lock_obj;
tib = __get_tls();
pt = (struct PosixThread *)tib->tib_pthread;
atomic_store_explicit(&pt->cancelled, false, memory_order_relaxed);
pt->tid = atomic_load_explicit(&tib->tib_tid, memory_order_relaxed);
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&__mmi_lock_obj, &attr);