From 6e2509a34fb6f8f06438ee9908eb61320b73697f Mon Sep 17 00:00:00 2001
From: Sebastian Lackner <sebastian@fds-team.de>
Date: Sun, 28 Sep 2014 23:39:51 +0200
Subject: [PATCH] ntdll: OutputDebugString should throw the exception a second
 time, if a debugger is attached.

---
 dlls/kernelbase/debug.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/dlls/kernelbase/debug.c b/dlls/kernelbase/debug.c
index e1976777b7f..7294f99da7e 100644
--- a/dlls/kernelbase/debug.c
+++ b/dlls/kernelbase/debug.c
@@ -202,6 +202,23 @@ void WINAPI DECLSPEC_HOTPATCH OutputDebugStringA( LPCSTR str )
     __ENDTRY
     if (caught_by_dbg) return;
 
+    /* for some unknown reason Windows sends the exception a second time, if a
+     * debugger is attached, and the event wasn't handled in the first attempt */
+    if (NtCurrentTeb()->Peb->BeingDebugged)
+    {
+        __TRY
+        {
+            ULONG_PTR args[2];
+            args[0] = strlen(str) + 1;
+            args[1] = (ULONG_PTR)str;
+            RaiseException( DBG_PRINTEXCEPTION_C, 0, 2, args );
+        }
+        __EXCEPT(debug_exception_handler)
+        {
+        }
+        __ENDTRY
+    }
+
     /* send string to a system-wide monitor */
     if (!mutex_inited)
     {
-- 
2.40.1