Always zero all elements of siginfo_t throughout.

* cygtls.h (_cygtls::thread_context): Declare new field.
(_cygtls::thread_id): Ditto.
(_cygtls::signal_exit): Move into this class.
(_cygtls::copy_context): Declare new function.
(_cygtls::signal_debugger): Ditto.
* cygtls.cc (_cygtls::init_thread): Fill out thread id field.
* exceptions.cc (exception): Change message when exception info is unknown.
Copy context to thread local storage.
(_cygtls::handle_exceptions): Avoid double test for fault_guarded.  Reflect
move of signal_exit to _cygtls class.
(sigpacket::process): Copy context to thread local storage.
(_cygtls::signal_exit): Move to _cygtls class.  Call signal_debugger to notify
debugger of exiting signal (WIP).  Call stackdump here (WIP).
(_cygtls::copy_context): Define new function.
(_cygtls::signal_debugger): Ditto.
* tlsoffsets.h: Regenerate.
* include/cygwin.h (_fpstate): New internal structure.
(ucontext): Declare new structure (WIP).
(__COPY_CONTEXT_SIZE): New define.
* exceptions.cc (_cygtls::interrupt_setup): Clear "threadkill" field when there
is no sigwaiting thread.
(setup_handler): Move event handling into interrupt_setup.

1 files changed, 2 insertions, 4 deletions

diff --git a/winsup/cygwin/fhandler_termios.cc b/winsup/cygwin/fhandler_termios.cc
index d607ea6b4..9b1098fca 100644
--- a/winsup/cygwin/fhandler_termios.cc
+++ b/winsup/cygwin/fhandler_termios.cc
@@ -110,10 +110,9 @@ tty_min::kill_pgrp (int sig)
 {
   int killself = 0;
   winpids pids ((DWORD) PID_MAP_RW);
-  siginfo_t si;
+  siginfo_t si = {0};
   si.si_signo = sig;
   si.si_code = SI_KERNEL;
-  si.si_pid = si.si_uid = si.si_errno = 0;
   for (unsigned i = 0; i < pids.npids; i++)
     {
       _pinfo *p = pids[i];
@@ -172,10 +171,9 @@ fhandler_termios::bg_check (int sig)
      by another signal. */
   if (WaitForSingleObject (signal_arrived, 0) != WAIT_OBJECT_0)
     {
-      siginfo_t si;
+      siginfo_t si = {0};
       si.si_signo = sig;
       si.si_code = SI_KERNEL;
-      si.si_pid = si.si_uid = si.si_errno = 0;
       kill_pgrp (myself->pgid, si);
     }
   return bg_signalled;