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Make improvements

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- Clean up sigaction() code
- Add a port scanner example
- Introduce a ParseCidr() API
- Clean up our futex abstraction code
- Fix a harmless integer overflow in ParseIp()
- Use kernel semaphores on NetBSD to make threads much faster
This commit is contained in:
Justine Tunney 2022-11-07 02:22:09 -08:00
parent 539bddce8c
commit c995838e5c
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GPG key ID: BE714B4575D6E328
107 changed files with 1085 additions and 492 deletions
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15
libc/thread/pthread_cancel.c
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@ -51,10 +51,10 @@ int _pthread_cancel_sys(void) {
return ecanceled();
}
static void OnSigCancel(int sig, siginfo_t *si, void *ctx) {
static void OnSigThr(int sig, siginfo_t *si, void *ctx) {
ucontext_t *uc = ctx;
struct CosmoTib *tib = __get_tls();
struct PosixThread *pt = (struct PosixThread *)tib->tib_pthread;
struct CosmoTib *t = __get_tls();
struct PosixThread *pt = (struct PosixThread *)t->tib_pthread;
if (pt && !(pt->flags & PT_NOCANCEL) &&
atomic_load_explicit(&pt->cancelled, memory_order_acquire)) {
sigaddset(&uc->uc_sigmask, sig);
@ -64,15 +64,14 @@ static void OnSigCancel(int sig, siginfo_t *si, void *ctx) {
} else if (pt->flags & PT_ASYNC) {
pthread_exit(PTHREAD_CANCELED);
} else {
__tkill(atomic_load_explicit(&tib->tib_tid, memory_order_relaxed), sig,
tib);
__tkill(atomic_load_explicit(&t->tib_tid, memory_order_relaxed), sig, t);
}
}
}
static void ListenForSigCancel(void) {
static void ListenForSigThr(void) {
struct sigaction sa;
sa.sa_sigaction = OnSigCancel;
sa.sa_sigaction = OnSigThr;
sa.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
memset(&sa.sa_mask, -1, sizeof(sa.sa_mask));
_npassert(!sigaction(SIGTHR, &sa, 0));
@ -262,7 +261,7 @@ errno_t pthread_cancel(pthread_t thread) {
int e, rc, tid;
static bool once;
struct PosixThread *pt;
if (!once) ListenForSigCancel(), once = true;
if (!once) ListenForSigThr(), once = true;
pt = (struct PosixThread *)thread;
switch (atomic_load_explicit(&pt->status, memory_order_acquire)) {
case kPosixThreadZombie: