[PATCH] Cygwin: exceptions.cc: Suspend all threads in sig_handle_tty_stop().

[Takashi Yano via Cygwin-patches]

- Currently, thread created by pthread_create() is not suspended by
  the signal SIGTSTP. For example, even if a process with a thread
  is suspended by Ctrl-Z, the thread continues running. This patch
  fixes the issue.
---
 winsup/cygwin/exceptions.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/winsup/cygwin/exceptions.cc b/winsup/cygwin/exceptions.cc
index c98b92d30..3a6823325 100644
--- a/winsup/cygwin/exceptions.cc
+++ b/winsup/cygwin/exceptions.cc
@@ -902,7 +902,9 @@ sig_handle_tty_stop (int sig, siginfo_t *, void *)
         thread. */
       /* Use special cygwait parameter to handle SIGCONT.  _main_tls.sig will
         be cleared under lock when SIGCONT is detected.  */
+      pthread::suspend_all_except_self ();
       DWORD res = cygwait (NULL, cw_infinite, cw_sig_cont);
+      pthread::resume_all ();
       switch (res)
        {
        case WAIT_SIGNALED:
-- 
2.30.0