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, 1 insertions, 5 deletions

diff --git a/winsup/cygwin/pinfo.cc b/winsup/cygwin/pinfo.cc
index 7267ed0fb..c71299ff0 100644
--- a/winsup/cygwin/pinfo.cc
+++ b/winsup/cygwin/pinfo.cc
@@ -836,17 +836,13 @@ proc_waiter (void *arg)
   pinfo vchild = *(pinfo *) arg;
   ((pinfo *) arg)->waiter_ready = true;
 
-  siginfo_t si;
+  siginfo_t si = {0};
   si.si_signo = SIGCHLD;
   si.si_code = CLD_EXITED;
   si.si_pid = vchild->pid;
-  si.si_errno = 0;
 #if 0	// FIXME: This is tricky to get right
   si.si_utime = pchildren[rc]->rusage_self.ru_utime;
   si.si_stime = pchildren[rc].rusage_self.ru_stime;
-#else
-  si.si_utime = 0;
-  si.si_stime = 0;
 #endif
   pid_t pid = vchild->pid;