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: Signed-off-by: Takashi Yano <takashi.y...@nifty.ne.jp> --- 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; -- 2.45.1
