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Make improvements

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- Improved async signal safety of read() particularly for longjmp()
- Started adding cancel cleanup handlers for locks / etc on Windows
- Make /dev/tty work better particularly for uses like `foo | less`
- Eagerly read console input into a linked list, so poll can signal
- Fix some libc definitional bugs, which configure scripts detected
This commit is contained in:
Justine Tunney 2023-09-21 07:30:39 -07:00
parent d6c2830850
commit 0c5dd7b342
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GPG key ID: BE714B4575D6E328
85 changed files with 1062 additions and 671 deletions
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15
libc/thread/pthread_cancel.c
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@ -92,11 +92,7 @@ static void _pthread_cancel_sig(int sig, siginfo_t *si, void *arg) {
// punts cancellation to start of next cancellation point
// we ensure sigthr is a pending signal in case unblocked
if (IsXnuSilicon()) {
__syslib->__pthread_kill(_pthread_syshand(pt), sig);
} else {
sys_tkill(_pthread_tid(pt), sig, __get_tls());
}
raise(sig);
}
static void _pthread_cancel_listen(void) {
@ -111,10 +107,7 @@ static void _pthread_cancel_listen(void) {
static void pthread_cancel_nt(struct PosixThread *pt, intptr_t hThread) {
uint32_t old_suspend_count;
if (!(pt->pt_flags & PT_NOCANCEL) &&
(pt->pt_flags & (PT_ASYNC | PT_MASKED))) {
pt->pt_flags |= PT_NOCANCEL;
pt->abort_errno = ECANCELED;
if (!(pt->pt_flags & PT_NOCANCEL)) {
if ((pt->pt_flags & PT_ASYNC) &&
(old_suspend_count = SuspendThread(hThread)) != -1u) {
if (!old_suspend_count) {
@ -125,13 +118,13 @@ static void pthread_cancel_nt(struct PosixThread *pt, intptr_t hThread) {
cpu.Rdi = (uintptr_t)PTHREAD_CANCELED;
cpu.Rsp &= -16;
*(uintptr_t *)(cpu.Rsp -= sizeof(uintptr_t)) = cpu.Rip;
pt->abort_errno = ECANCELED;
unassert(SetThreadContext(hThread, &cpu));
}
}
ResumeThread(hThread);
}
__sig_cancel(pt);
pt->abort_errno = ECANCELED;
__sig_cancel(pt, 0);
}
}