On Tue, 2 Jan 2024 19:33:44 GMT, Alexey Ivanov <aiva...@openjdk.org> wrote:
>> When running with fastdebug binaries we run intermittent into the issue >> below in >> jtreg test >> java/awt/image/MultiResolutionImage/MultiResolutionImageObserverTest.java . >> Seems we miss checking of successful HBITMAP creation before calling >> GetDIBits. >> >> HDC hBMDC = this->GetDC(); >> HBITMAP hBM = ::CreateCompatibleBitmap(hBMDC, 1, 1); >> VERIFY(::GetDIBits(hBMDC, hBM, 0, 1, NULL, gpBitmapInfo, DIB_RGB_COLORS)); >> >> in awt_Win32GraphicsDevice.cpp . Thats why the releast of hBMDC / hBM fails >> as well at the end of the function causing the seond and third warning. >> >> >> Sat Nov 18 17:29:23 CET 2023 >> >> ********************* >> AWT Assertion Failure >> ********************* >> ::GetDIBits(hBMDC, hBM, 0, 1, 0, gpBitmapInfo, 0) >> File >> 'e:\openjdk\openjdk-21u-windows_x86_64-dbg\jdk\src\java.desktop\windows\native\libawt\windows\awt_Win32GraphicsDevice.cpp', >> at line 184 >> GetLastError() is 57 : The parameter is incorrect. >> >> Do you want to break into the debugger? >> ********************* >> ********************* >> AWT Assertion Failure >> ********************* >> ::DeleteObject(hBM) >> File >> 'e:\openjdk\openjdk-21u-windows_x86_64-dbg\jdk\src\java.desktop\windows\native\libawt\windows\awt_Win32GraphicsDevice.cpp', >> at line 297 >> GetLastError() is 57 : The parameter is incorrect. >> >> So it seems, we should have some additional checks/tracing. > > src/java.desktop/windows/native/libawt/windows/awt_Win32GraphicsDevice.cpp > line 142: > >> 140: } else { >> 141: J2dTraceLn1(J2D_TRACE_WARNING, >> 142: "CreateDC failed, so we cannot store the DC for >> later usage, mieInfo.szDevice is %S", > > Is `%S` a valid format string? It should in lower case: `%s`. > > It seems, “store the DC for later usage” is misleading, it isn't stored… at > least for a long period of time. https://learn.microsoft.com/en-us/cpp/c-runtime-library/format-specification-syntax-printf-and-wprintf-functions?view=msvc-170 The %S is for wide chars, do you think we need the other one (%s) ? ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/17197#discussion_r1440174314