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Cygwin: return full sigset_t from sig_send

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So far sig_send's return type is int.  The problem with this is
that sig_send returns a sigset_t on __SIGPENDING, and sigset_t
is defined as long type.  So the function only returns the lower
32 bit of sigset_t, which is fine on 32 bit, but casts away the
pending RT signals on 64 bit.

Fix this by changing the return type of sig_send to sigset_t, so
as not to narrow down the sigset when returning from handling
__SIGPENDING.  Make sure to cast correctly in all invocations
of sig_send.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen
2019-07-12 16:32:45 +02:00
parent 0d24a86822
commit 948d40e482
5 changed files with 12 additions and 12 deletions
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2
winsup/cygwin/fhandler_signalfd.cc
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@ -151,7 +151,7 @@ fhandler_signalfd::write (const void *, size_t)
int
fhandler_signalfd::poll ()
{
sigset_t outset = (sigset_t) sig_send (myself, __SIGPENDING, &_my_tls);
sigset_t outset = sig_send (myself, __SIGPENDING, &_my_tls);
if (outset == SIG_BAD_MASK)
return -1;
if ((outset & sigset) != 0)