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, 4 insertions, 8 deletions

diff --git a/winsup/cygwin/signal.cc b/winsup/cygwin/signal.cc
index 09e8eee0e..1055b5fe9 100644
--- a/winsup/cygwin/signal.cc
+++ b/winsup/cygwin/signal.cc
@@ -209,10 +209,9 @@ _pinfo::kill (siginfo_t& si)
     }
   else if (sendSIGCONT)
     {
-      siginfo_t si2;
+      siginfo_t si2 = {0};
       si2.si_signo = SIGCONT;
       si2.si_code = SI_KERNEL;
-      si2.si_pid = si2.si_uid = si2.si_errno = 0;
       sig_send (this, si2);
     }
 
@@ -251,20 +250,18 @@ kill0 (pid_t pid, siginfo_t& si)
 int
 killsys (pid_t pid, int sig)
 {
-  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;
   return kill0 (pid, si);
 }
 
 int
 kill (pid_t pid, int sig)
 {
-  siginfo_t si;
+  siginfo_t si = {0};
   si.si_signo = sig;
   si.si_code = SI_USER;
-  si.si_pid = si.si_uid = si.si_errno = 0;
   return kill0 (pid, si);
 }
 
@@ -538,7 +535,7 @@ sigwaitinfo (const sigset_t *set, siginfo_t *info)
 extern "C" int
 sigqueue (pid_t pid, int sig, const union sigval value)
 {
-  siginfo_t si;
+  siginfo_t si = {0};
   pinfo dest (pid);
   if (!dest)
     {
@@ -547,7 +544,6 @@ sigqueue (pid_t pid, int sig, const union sigval value)
     }
   si.si_signo = sig;
   si.si_code = SI_QUEUE;
-  si.si_pid = si.si_uid = si.si_errno = 0;
   si.si_value = value;
   return sig_send (dest, si);
 }