logging: add some strategic places around vcl messages

Change-Id: I3eb1076a0dd697ceb3b4310444542f324848b358
Reviewed-on: https://gerrit.libreoffice.org/53777Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>

include/sal/log-areas.dox

@@ -462,6 +462,7 @@ certain functionality.
 @li @c vcl.filter
 @li @c vcl.fonts - font-specific code
 @li @c vcl.gdi - the GDI part of VCL, devices, bitmaps, etc.
+@li @c vcl.gdi.wndproc - Windows Procedure part of VCL
 @li @c vcl.gdi.fontmetric
 @li @c vcl.gtk - Gtk+ 2/3 plugin
 @li @c vcl.gtk3

toolkit/source/awt/vclxwindow.cxx

@@ -269,6 +269,8 @@ IMPL_LINK_NOARG(VCLXWindowImpl, OnProcessCallbacks, void*, void)
 {
     const Reference< uno::XInterface > xKeepAlive( mrAntiImpl );
 
+    SAL_INFO("toolkit.controls", "OnProcessCallbacks grabbing solarmutex");
+
     // work on a copy of the callback array
     CallbackArray aCallbacksCopy;
     {
@@ -287,6 +289,7 @@ IMPL_LINK_NOARG(VCLXWindowImpl, OnProcessCallbacks, void*, void)
     }
 
     {
+        SAL_INFO("toolkit.controls", "OnProcessCallbacks relinquished solarmutex");
         SolarMutexReleaser aReleaseSolar;
         for (   CallbackArray::const_iterator loop = aCallbacksCopy.begin();
                 loop != aCallbacksCopy.end();

vcl/win/app/salinst.cxx

@@ -582,6 +582,8 @@ LRESULT CALLBACK SalComWndProc( HWND, UINT nMsg, WPARAM wParam, LPARAM lParam, b
     WinSalInstance *pInst = GetSalData()->mpInstance;
     WinSalTimer *const pTimer = static_cast<WinSalTimer*>( ImplGetSVData()->maSchedCtx.mpSalTimer );
 
+SAL_INFO("vcl.gdi.wndproc", "SalComWndProc(nMsg=" << nMsg << ", wParam=" << wParam << ", lParam=" << lParam << ")");
+
     switch ( nMsg )
     {
         case SAL_MSG_THREADYIELD:

vcl/win/window/salframe.cxx

@@ -5437,6 +5437,8 @@ LRESULT CALLBACK SalFrameWndProc( HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lP
     static bool  bInWheelMsg = false;
     static bool  bInQueryEnd = false;
 
+    SAL_INFO("vcl.gdi.wndproc", "SalFrameWndProc(nMsg=" << nMsg << ", wParam=" << wParam << ", lParam=" << lParam << ")");
+
     // By WM_CREATE we connect the frame with the window handle
     if ( nMsg == WM_CREATE )
     {