From 5345a66f9403133fc7cdd9ec8273c7bb3d19020d 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 +++++++++++++++++
 dlls/ntdll/tests/exception.c |  9 ++++-----
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/dlls/kernelbase/debug.c b/dlls/kernelbase/debug.c
index 6acdf0f1ea9..edb95eace3f 100644
--- a/dlls/kernelbase/debug.c
+++ b/dlls/kernelbase/debug.c
@@ -213,6 +213,23 @@ 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)
     {
diff --git a/dlls/ntdll/tests/exception.c b/dlls/ntdll/tests/exception.c
index 7ee191469ec..561ccf966d9 100644
--- a/dlls/ntdll/tests/exception.c
+++ b/dlls/ntdll/tests/exception.c
@@ -4532,7 +4532,7 @@ static LONG CALLBACK outputdebugstring_vectored_handler(EXCEPTION_POINTERS *Exce
     return EXCEPTION_CONTINUE_SEARCH;
 }
 
-static void test_outputdebugstring(DWORD numexc, BOOL todo)
+static void test_outputdebugstring(DWORD numexc)
 {
     PVOID vectored_handler;
 
@@ -4548,7 +4548,6 @@ static void test_outputdebugstring(DWORD numexc, BOOL todo)
     outputdebugstring_exceptions = 0;
     OutputDebugStringA("Hello World");
 
-    todo_wine_if(todo)
     ok(outputdebugstring_exceptions == numexc, "OutputDebugStringA generated %d exceptions, expected %d\n",
        outputdebugstring_exceptions, numexc);
 
@@ -5148,9 +5147,9 @@ START_TEST(exception)
         else skip( "RtlRaiseException not found\n" );
 #endif
         test_stage = 3;
-        test_outputdebugstring(0, FALSE);
+        test_outputdebugstring(0);
         test_stage = 4;
-        test_outputdebugstring(2, TRUE); /* is this a Windows bug? */
+        test_outputdebugstring(2);
         test_stage = 5;
         test_ripevent(0);
         test_stage = 6;
@@ -5226,7 +5225,7 @@ START_TEST(exception)
 
     test_debugger();
     test_thread_context();
-    test_outputdebugstring(1, FALSE);
+    test_outputdebugstring(1);
     test_ripevent(1);
     test_breakpoint(1);
     test_closehandle(0, (HANDLE)0xdeadbeef);
-- 
2.27.0