https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=c5f9eed1c045ad05e968c9a9b8fb22b1d46cd8ea
commit c5f9eed1c045ad05e968c9a9b8fb22b1d46cd8ea Author: Corinna Vinschen <cori...@vinschen.de> Date: Thu Apr 4 21:25:47 2019 +0200 Cygwin: signals: make setcontext work from signal handlers Signed-off-by: Corinna Vinschen <cori...@vinschen.de> Diff: --- winsup/cygwin/exceptions.cc | 1 + 1 file changed, 1 insertion(+) diff --git a/winsup/cygwin/exceptions.cc b/winsup/cygwin/exceptions.cc index a9b3781..0aaeee5 100644 --- a/winsup/cygwin/exceptions.cc +++ b/winsup/cygwin/exceptions.cc @@ -1867,6 +1867,7 @@ setcontext (const ucontext_t *ucp) { PCONTEXT ctx = (PCONTEXT) &ucp->uc_mcontext; _my_tls.sigmask = ucp->uc_sigmask; + _my_tls.incyg = true; #ifdef __x86_64__ /* Apparently a call to NtContinue works on 64 bit as well, but using RtlRestoreContext is the blessed way. */