* thread.h (pthread::init_mainthread): Add parameter forked. Set forked

default to false..
* thread.cc (MTinterface::fixup_after_fork): Call pthread::init_mainthread with
forked = true.
(pthread::init_mainthread): Add parameter forked.  Do not change thread self
pointer when forked.

1 files changed, 10 insertions, 5 deletions

diff --git a/winsup/cygwin/thread.cc b/winsup/cygwin/thread.cc
index a18834ddf..3652a91fa 100644
--- a/winsup/cygwin/thread.cc
+++ b/winsup/cygwin/thread.cc
@@ -153,7 +153,7 @@ MTinterface::fixup_after_fork (void)
   pthread_key::fixup_after_fork ();
 
   threadcount = 0;
-  pthread::init_mainthread ();
+  pthread::init_mainthread (true);
 
   pthread::fixup_after_fork ();
   pthread_mutex::fixup_after_fork ();
@@ -166,14 +166,19 @@ MTinterface::fixup_after_fork (void)
 
 /* static methods */
 void
-pthread::init_mainthread ()
+pthread::init_mainthread (const bool forked)
 {
   pthread *thread = get_tls_self_pointer ();
   if (!thread)
     {
-      thread = new pthread ();
-      if (!thread)
-	api_fatal ("failed to create mainthread object");
+      if (forked)
+        thread = pthread_null::get_null_pthread ();
+      else
+        {
+          thread = new pthread ();
+          if (!thread)
+            api_fatal ("failed to create mainthread object");
+        }
     }
 
   thread->cygtls = &_my_tls;