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Hunt down more bugs

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After going through the MODE=dbg and MODE=zero build modes, a bunch of
little issues were identified, which have been addressed. Fixing those
issues created even more troubles for the project, because it improved
our ability to detect latent problems which are getting fixed so fast.
This commit is contained in:
Justine Tunney 2023-07-03 17:35:11 -07:00
parent 73c0faa1b5
commit 97b7116953
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GPG key ID: BE714B4575D6E328
39 changed files with 557 additions and 754 deletions
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14
libc/calls/sigaction.c
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@ -467,6 +467,13 @@ static int __sigaction(int sig, const struct sigaction *act,
* spawned your process, happened to call `setrlimit()`. Doing this is
* a wonderful idea.
*
* Using signals might make your C runtime slower. Upon successfully
* installing its first signal handling function, sigaction() will set
* the global variable `__interruptible` to true, to let everything else
* know that signals are in play. That way code which would otherwise be
* frequently calling sigprocmask() out of an abundance of caution, will
* no longer need to pay its outrageous cost.
*
* @return 0 on success or -1 w/ errno
* @see xsigaction() for a much better api
* @asyncsignalsafe
@ -478,6 +485,13 @@ int sigaction(int sig, const struct sigaction *act, struct sigaction *oldact) {
rc = einval();
} else {
rc = __sigaction(sig, act, oldact);
if (!rc && act && (uintptr_t)act->sa_handler >= kSigactionMinRva) {
static bool once;
if (!once) {
__interruptible = true;
once = true;
}
}
}
STRACE("sigaction(%G, %s, [%s]) → %d% m", sig, DescribeSigaction(0, act),
DescribeSigaction(rc, oldact), rc);