https://bz.apache.org/ooo/show_bug.cgi?id=126629
Issue ID: 126629
Issue Type: DEFECT
Summary: aoo suddenly crashes on win7 - incorrect call of
"dwmapi.dll" in "salframe.cxx"
Product: General
Version: 4.0.1
Hardware: PC
OS: Windows 7
Status: CONFIRMED
Severity: critical
Priority: P5
Component: code
Assignee: issues@openoffice.apache.org
Reporter: oliver.brinz...@gmx.de
Created attachment 85107
--> https://bz.apache.org/ooo/attachment.cgi?id=85107&action=edit
correct call
first noticed with aoo 4.0.1
\main\vcl\win\source\window\salframe.cxx:
static BOOL ImplDwmIsCompositionEnabled()
{
SalData* pSalData = GetSalData();
if( ! pSalData->mpDwmIsCompositionEnabled )
{
pSalData->maDwmLib = osl_loadAsciiModule( "Dwmapi.dll",
SAL_LOADMODULE_DEFAULT );
if( pSalData->maDwmLib )
pSalData->mpDwmIsCompositionEnabled =
(DwmIsCompositionEnabled_ptr)osl_getAsciiFunctionSymbol(
pSalData->maDwmLib, "DwmIsCompositionEnabled" );
if( ! pSalData->mpDwmIsCompositionEnabled ) // something failed
pSalData->mpDwmIsCompositionEnabled =
backwardCompatibleDwmIsCompositionEnabled;
}
BOOL aResult = FALSE;
HRESULT nError = pSalData->mpDwmIsCompositionEnabled( &aResult );
return nError == S_OK && aResult;
}
"pSalData->mpDwmIsCompositionEnabled" is initialized only the first time
ImplDwmIsCompositionEnabled() is called.
but ImplDwmIsCompositionEnabled() is called periodically (e.g. window events
from other programs).
for whatever reason sometimes the "pSalData->mpDwmIsCompositionEnabled" pointer
gets
corrupted, and a call causes aoo to crash.
attached "ImplDwmIsCompositionEnabled_1.png" shows a correct call while
ImplDwmIsCompositionEnabled_2.png shows a corrupted one.
updating "dwmapi.dll" with "KB3078667"
https://support.microsoft.com/en-us/kb/3078667
will not solve the problem.
btw: if aoo runs with xp compatibility settings, it will not crash.
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