[newlib-cygwin] Cygwin: cygthread: set thread name before calling thread func

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=b79b0c2bae128c4a48ba4f0c890b3424ddc6c4cd

commit b79b0c2bae128c4a48ba4f0c890b3424ddc6c4cd
Author: Corinna Vinschen <corinna@vinschen.de>
Date:   Wed Jan 23 21:39:19 2019 +0100

    Cygwin: cygthread: set thread name before calling thread func
    
    When reusing a cygthread, the stub method fails to set the thread name
    to the new name.  The name is only set when actually creating the
    thread.  Fix that by moving the SetThreadName call right in front of the
    thread function call.
    
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 winsup/cygwin/cygthread.cc   | 4 ++--
 winsup/cygwin/release/2.12.0 | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/winsup/cygwin/cygthread.cc b/winsup/cygwin/cygthread.cc
index 4404e4a..66a3179 100644
--- a/winsup/cygwin/cygthread.cc
+++ b/winsup/cygwin/cygthread.cc
@@ -87,6 +87,7 @@ cygthread::stub (VOID *arg)
 #endif
       else
 	{
+	  SetThreadName (info->id, info->__name);
 	  info->callfunc (false);
 
 	  HANDLE notify = info->notify_detached;
@@ -128,6 +129,7 @@ cygthread::simplestub (VOID *arg)
   _my_tls._ctinfo = info;
   info->stack_ptr = &arg;
   HANDLE notify = info->notify_detached;
+  SetThreadName (info->id, info->__name);
   info->callfunc (true);
   if (notify)
      SetEvent (notify);
@@ -213,8 +215,6 @@ cygthread::create ()
 			    this, 0, &id);
       if (!htobe)
 	api_fatal ("CreateThread failed for %s - %p<%y>, %E", __name, h, id);
-      else
-	SetThreadName (GetThreadId (htobe), __name);
       thread_printf ("created name '%s', thread %p, id %y", __name, h, id);
 #ifdef DEBUGGING
       terminated = false;
diff --git a/winsup/cygwin/release/2.12.0 b/winsup/cygwin/release/2.12.0
index af74b09..c847b91 100644
--- a/winsup/cygwin/release/2.12.0
+++ b/winsup/cygwin/release/2.12.0
@@ -77,3 +77,5 @@ Bug Fixes
 
 - Fix WEOF handling in wctype functions.
   Addresses: https://cygwin.com/ml/cygwin/2018-12/msg00173.html
+
+- Fix thread names in GDB when cygthreads get reused.