* cygheap.h (cygheap_fdenum::cygheap_fdenum): Record locked state or suffer

deadlocks.
(class locked_process): Move to another header.
* sync.h (lock_process): Define here.
* cygtls.cc (_cygtls::fixup_after_fork): Reset spinning state as well as
stacklock state.
* dcrt0.cc (lock_process::locker): Define.
(dtable::lock_cs): Delete.
* dtable.cc (dtable_init): Eliminate call to init_lock().
(dtable::fixup_after_fork): Ditto.
(dtable::init_lock): Delete definition.
* dtable.h (dtable::init_lock): Delete declaration.
(dtable::lock): Use process lock rather than dtable-specific lock.
(dtable::unlock): Ditto.
* sigproc.cc (sigproc_init): Minor change to debugging output.
* times.cc (utime_worker): Use build_fh_pc rather than reinterpreting the posix
path name again.  Return any error from path_conv immediately.

winsup/cygwin/sync.h

@@ -44,4 +44,28 @@ public:
   static void set_exiting_thread () {exiting_thread = GetCurrentThreadId ();}
 };
 
+class lock_process
+{
+  bool skip_unlock;
+  static muto locker;
+public:
+  static void init () {locker.init ("lock_process");}
+  lock_process (bool exiting = false)
+  {
+    locker.acquire ();
+    skip_unlock = exiting;
+    if (exiting && exit_state < ES_SET_MUTO)
+      {
+	exit_state = ES_SET_MUTO;
+	muto::set_exiting_thread ();
+      }
+  }
+  ~lock_process ()
+  {
+    if (!skip_unlock)
+      locker.release ();
+  }
+  friend class dtable;
+};
+
 #endif /*_SYNC_H*/