* DevNotes: Add entry cgf-000018.

* init.cc (dll_entry): Grab process lock before exiting to ensure that thread
doesn't exit before parent if parent is exiting.
* _cygtls.cc (_cygtls::call2): Revert previous 2012-12-21 change.
* miscfuncs.cc (thread_wrapper): Ditto.
* thread.cc (pthread::exit): Ditto.
* sigproc.cc (exit_thread): Ditto.
(wait_sig): Ditto.
* sync.cc (muto::release): Ditto.
* sync.h (muto::release): Ditto.
* sigproc.h (__SIGTHREADEXIT): Delete enum.
(exit_thread): Delete declaration.

winsup/cygwin/init.cc

@@ -13,6 +13,7 @@ details. */
 #include "cygtls.h"
 #include "ntdll.h"
 #include "shared_info.h"
+#include "sync.h"
 
 static DWORD _my_oldfunc;
 
@@ -95,7 +96,14 @@ dll_entry (HANDLE h, DWORD reason, void *static_load)
       if (dll_finished_loading
 	  && (PVOID) &_my_tls > (PVOID) &test_stack_marker
 	  && _my_tls.isinitialized ())
-	_my_tls.remove (0);
+	{
+	  _my_tls.remove (0);
+	  /* Make sure that we don't exit until the process has exited.
+	     Otherwise there is a potential race where the thread exit
+	     code could be considered to be the process exit code.
+	     See cgf-000017 and cgf-000018 in DevNotes.  */
+	  lock_process here;
+	}
       /* Windows 2000 has a bug in NtTerminateThread.  Instead of releasing
 	 the stack at teb->DeallocationStack it uses the value of
 	 teb->Tib.StackLimit to evaluate the stack address.  So we just claim