https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=3c1308ed890eac4333d0a16f5795203cee4f38b2
commit 3c1308ed890eac4333d0a16f5795203cee4f38b2
Author: Takashi Yano <takashi.y...@nifty.ne.jp>
Date: Fri Feb 28 16:56:30 2025 +0900
Cygwin: signal: Fix a problem that process hangs on exit
The process that receives many SIGSTOP/SIGCONT signals sometimes hangs
on exit in sig_dispatch_pending(). This patch skips processing signals
in call_signal_handler() when exit_state > ES_EXIT_STARTING to avoid
that situation.
Addresses: https://cygwin.com/pipermail/cygwin/2025-February/257473.html
Fixes: d243e51ef1d3 ("Cygwin: signal: Fix deadlock between main thread and
sig thread")
Reported-by: Christian Franke <christian.fra...@t-online.de>
Reviewed-by: Corinna Vinschen <cori...@vinschen.de>
Signed-off-by: Takashi Yano <takashi.y...@nifty.ne.jp>
Diff:
---
winsup/cygwin/exceptions.cc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/winsup/cygwin/exceptions.cc b/winsup/cygwin/exceptions.cc
index 45c71cbdf..759f89dca 100644
--- a/winsup/cygwin/exceptions.cc
+++ b/winsup/cygwin/exceptions.cc
@@ -1675,7 +1675,7 @@ _cygtls::call_signal_handler ()
while (1)
{
lock ();
- if (!current_sig)
+ if (!current_sig || exit_state > ES_EXIT_STARTING)
{
unlock ();
break;
