* child_info.h (child_info_spawn::hexec_proc): Eliminate.

* dcrt0.cc (dll_crt0_0): Remove hexec_proc stuff.
* fork.cc (fork_child): Remove call to pinfo_fixup_after_fork.
* pinfo.cc (set_myself): Close and zero pid_handle if set.
(pinfo_fixup_after_fork): Delete.
(proc_waiter): Don't close vchild.hProcess here.  Do that when we are remove
the vchild from procs.  Save hProcess as pid_handle only on first reparent
operation.
(pinfo::wait): Don't set pid_handle here.
(pinfo::alert_parent): Always try to send signal.  If unsuccessful then close
and zero wr_proc_pipe.
* pinfo.h (pinfo::pinfo): Make sure that appropriate parts of the class are
zeroed on construction.
(pinfo::alert_parent): Take char argument.
(pinfo_fixup_after_fork): Delete declaration.
(hexec_proc): Ditto.
* sigproc.cc (remove_proc): Close pid_handle and hProcess if appropriate.
* spawn.cc (spawn_guts): Set cygheap->pid_handle on first exec.
* cygheap.h (init_cygheap::pid_handle): New element.
* pinfo.cc (set_myself): Clear previously existing cygheap->pid_handle when a
new process has been started.
(pinfo::wait): Make sure that a handle to the newly forked/spawned process is
kept around so that the pid will not be reused.
* pinfo.h (_pinfo::pid_handle): Move.
(pinfo::pid_handle): to here.
* spawn.cc (spawn_guts): Create a pid_handle in cygheap prior to spawning to
ensure that the pid does not get reused during the lifetime of the "cygwin
pid".
* pinfo.h (pinfo::alert_parent): New function.
* exceptions.cc (sig_handle_tty_stop): Use alert_parent to send "signals" to
parent.
* fork.cc (fork_parent): Don't close pi.hProcess.  Let the waiter thread do
that.
* pinfo.cc (proc_waiter): Detect case where process exits without setting the
exit code and use value from GetExitCodeProcess.  Reluctantly implement
__SIGREPARENT.
(pinfo::alert_parent): Define.
* sigproc.h (__SIGREPARENT): New enum.
* spawn.cc (spawn_guts): Send reparent signal to parent on exec.  Always create
process in suspended state to avoid races.  Remove cygthread.h in favor of
cygtls.h throughout since cygtls now includes cygthread.h.  Eliminate
ppid_handle usage throughout.
* child_info.h: Regenerate magic number
(child_info): Remove pppid_handle.
* cygthread.h (cygthread::release): New method.  Frees thread without waiting.
* cygthread.cc (cygthread::stub): Set _ctinfo in _mytls to point to information
for executing thread.  Don't call SetEvent if thread is no longer in use.
(cygthread::simplestub): Ditto.
* cygtls.h (_cygtls::_ctinfo): New element contains pointer to information
about executing cygthread, if any.
* dcrt0.cc: Remove last vestiges of per_thread stuff.
(dll_crt0_0): Ditto.  Remove accommodation for ppid_handle.
(do_exit): Remove obsolete reparenting test.
(_exit): Exit with a more SUSv3-like exit value.
* dtable.cc (dtable::stdio_init): Check for myself->cygstarted rather than
myself->ppid_handle to see if we were started by a cygwin process.
* exceptions.cc (open_stackdumpfile): Ditto.
(handle_exceptions): Ditto.
(ctrl_c_handler): Ditto.
(sig_handle_tty_stop): Ditto.  Let parent send signal to itself on STOP.
(sigpacket::process): Comment out vfork test.
(signal_exit): Use more SUSv3-like exit value on signal.
* external.cc (fillout_pinfo): Don't set hProcess.
* fork.cc: Remove VFORK cruft.
(per_thread::set): Delete.
(fork_child): Remove perthread stuff.
(fork_parent): Remove obsolete subproc_init.  Accommodate new method for
tracking subprocesses.
* pinfo.cc (set_myself): Accommodate new pinfo/_pinfo layout.  Set some things
here that used to be set in wait_sig.
(_pinfo::exit): Set exitcode here.  Close process pipe.
(_pinfo::commune_send): Accommodeate new pinfo/_pinfo layout.
(proc_waiter): New function.  Waits, in a thread for subprocess to go away.
(pinfo::wait): New function.  Initialization for proc_waiter.
* pinfo.h (_pinfo::exitcode): New element.
(_pinfo::cygstarted): Ditto.
(_pinfo::wr_proc_pipe): Ditto.
(_pinfo::ppid_handle): Delete.
(_pinfo::hProcess): Delete.
(_pinfo::lock): Delete.
(pinfo::hProcess): New element.
(pinfo::lock): Ditto.
(pinfo::wait): Declare new function.
(pinfo::preserve): Define new function.
* sigproc.cc: Remove old stuff from wait_subproc thread based method.
(zombies): Remove.
(procs): New.
(my_parent_is_alive): Just check that the parent pid exists.
(mychild): Just use pinfo methods to determine if child is mine.
(proc_subproc): Revamp PROC_ADDCHILD to use pinfo::wait.  Remove
PROC_CHILDTERMINATED logic.  Use different method to remove processes from list
when SIGCHLD == SIG_IGN.
(proc_terminate): Gut.
(subproc_init): Delete.
(init_child_info): Remove setting of pppid_handle.
(checkstate): Revamp to only scan procs array.
(remove_proc): Rename from remove_zombie.  Don't close hProcess or pid_handle.
Don't release memory if it's myself.
(stopped_or_terminated): Change logic to handle new consolidated proc/zombie
array.
(wait_subproc): Delete.
* sigproc.h: Remove obsolete EXIT_* defines.
(subproc_init): Remove declaration.
* spawn.cc (spawn_guts): Remove reparenting stuff.  Use standard wait logic to
wait for child if started from a non-cygwin process.
* tlsoffsets.h: Regenerate.
* tty.cc (tty_init): Check for myself->cygstarted rather than
myself->ppid_handle to see if we were started by a cygwin process.
* include/sys/signal.h (external_pinfo::exitcode): Replace hProcess.
* include/sys/wait.h (WCOREDUMP): Define.
* fhandler_tty.cc (fhandler_tty_slave::read): Add debugging output for timeout
case.
* signal.cc (abort): Flag that we are exiting with the ABORT signal.

winsup/cygwin/pinfo.h

@@ -36,19 +36,12 @@ public:
      constants below. */
   DWORD process_state;
 
-  /* If hProcess is set, it's because it came from a
-     CreateProcess call.  This means it's process relative
-     to the thing which created the process.  That's ok because
-     we only use this handle from the parent. */
-  HANDLE hProcess;
+  DWORD exitcode;	/* set when process exits */
 
-#define PINFO_REDIR_SIZE ((char *) &myself.procinfo->hProcess - (char *) myself.procinfo)
+#define PINFO_REDIR_SIZE ((char *) &myself.procinfo->exitcode - (char *) myself.procinfo)
 
-  /* Handle associated with initial Windows pid which started it all. */
-  HANDLE pid_handle;
-
-  /* Handle to the logical parent of this pid. */
-  HANDLE ppid_handle;
+  /* > 0 if started by a cygwin process */
+  DWORD cygstarted;
 
   /* Parent process id.  */
   pid_t ppid;
@@ -120,7 +113,9 @@ public:
   HANDLE sendsig;
 private:
   sigset_t sig_mask;
-  CRITICAL_SECTION lock;
+public:
+  HANDLE wr_proc_pipe;
+  friend class pinfo;
 };
 
 class pinfo
@@ -129,12 +124,18 @@ class pinfo
   _pinfo *procinfo;
   bool destroy;
 public:
+  HANDLE rd_proc_pipe;
+  HANDLE hProcess;
+  CRITICAL_SECTION lock;
+  /* Handle associated with initial Windows pid which started it all. */
+  HANDLE pid_handle;
   void init (pid_t, DWORD, HANDLE = NULL) __attribute__ ((regparm(3)));
   pinfo () {}
-  pinfo (_pinfo *x): procinfo (x) {}
-  pinfo (pid_t n) {init (n, 0);}
-  pinfo (pid_t n, DWORD flag) {init (n, flag);}
+  pinfo (_pinfo *x): procinfo (x), hProcess (NULL), pid_handle (NULL) {}
+  pinfo (pid_t n) : rd_proc_pipe (NULL), hProcess (NULL), pid_handle (NULL) {init (n, 0);}
+  pinfo (pid_t n, DWORD flag) : rd_proc_pipe (NULL), hProcess (NULL), pid_handle (NULL)  {init (n, flag);}
   void release ();
+  int wait () __attribute__ ((regparm (1)));
   ~pinfo ()
   {
     if (destroy && procinfo)
@@ -151,6 +152,8 @@ public:
   _pinfo *operator * () const {return procinfo;}
   operator _pinfo * () const {return procinfo;}
   // operator bool () const {return (int) h;}
+  void preserve () { destroy = false; }
+  void alert_parent (char);
 #ifndef _SIGPROC_H
   int remember () {system_printf ("remember is not here"); return 0;}
 #else
@@ -210,9 +213,6 @@ extern pinfo myself;
 #define _P_VFORK 0
 #define _P_SYSTEM 512
 
-extern void __stdcall pinfo_fixup_after_fork ();
-extern HANDLE hexec_proc;
-
 /* For mmaps across fork(). */
 int __stdcall fixup_mmaps_after_fork (HANDLE parent);
 /* for shm areas across fork (). */