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sigsuspend: proper behaviour

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Matheus
2024-09-09 18:05:54 -03:00
parent 85cbdc05c1
commit caec7d4daa
4 changed files with 30 additions and 10 deletions
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kernel-src/sys/signal.c
+24 -1
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@@ -139,6 +139,20 @@ void signal_pending(struct thread_t *thread, sigset_t *sigset) {
PROCESS_LEAVE(proc);
}
void signal_suspend(sigset_t *sigset) {
thread_t *thread = _cpu()->thread;
THREAD_ENTER(thread);
memcpy(&thread->signals.oldmask, &thread->signals.mask, sizeof(sigset_t));
memcpy(&thread->signals.mask, sigset, sizeof(sigset_t));
thread->signals.suspending = true;
THREAD_LEAVE(thread);
sched_preparesleep(true);
sched_yield();
}
int signal_wait(sigset_t *sigset, timespec_t *timeout, siginfo_t *siginfo, int *signum) {
thread_t *thread = _cpu()->thread;
PROCESS_ENTER(thread->proc);
@@ -531,7 +545,16 @@ bool signal_check(struct thread_t *thread, context_t *context, bool syscall, uin
memcpy(&sigframe.oldstack, &thread->signals.stack, sizeof(stack_t));
memset(&thread->signals.stack, 0, sizeof(stack_t));
}
memcpy(&sigframe.oldmask, &thread->signals.mask, sizeof(sigset_t));
if (thread->signals.suspending) {
// if we were waiting in signal_suspend, push the old mask into the return frame
// of the first signal and set it to not act this way the next check
memcpy(&sigframe.oldmask, &thread->signals.oldmask, sizeof(sigset_t));
thread->signals.suspending = false;
} else {
// else, just push the current mask
memcpy(&sigframe.oldmask, &thread->signals.mask, sizeof(sigset_t));
}
memcpy(&sigframe.context, context, sizeof(context_t));
memcpy(&sigframe.extracontext, &thread->extracontext, sizeof(extracontext_t));
// TODO siginfo