c++ - MSVC 中的地址清理程序 : why does it report an error on startup?

Question

我正在尝试一个将 Qt 与 MSVC 2019 与 Address Sanitizer 结合使用的项目。我使用 Address Sanitizer 构建了该项目，但没有重建所有库，包括 Qt。
它在资源初始化时在 Qt 内崩溃(在调用堆栈中使用 qRegisterResourceData)。
这是:

滥用地址清理器，比如，我也应该用它重建 Qt DLL 吗？

Qt 中的一个问题我应该深入调查吗？

已知的 Qt 问题？

默认情况下，我在向导创建的小部件应用程序中重新创建了该问题。调用栈如下:

>   KernelBase.dll!RaiseException() Unknown
    QtWidgetsApplication1.exe!__vcasan::OnAsanReport(const char * description, const char * report, bool __throw) Line 602  C++
    QtWidgetsApplication1.exe!__vcasan::ReportCallback(const char * szReport) Line 325  C++
    clang_rt.asan_dbg_dynamic-x86_64.dll!__asan::ScopedInErrorReport::~ScopedInErrorReport(void)    Unknown
    clang_rt.asan_dbg_dynamic-x86_64.dll!__asan::ReportMallocUsableSizeNotOwned(unsigned __int64,struct __sanitizer::BufferedStackTrace *)  Unknown
    clang_rt.asan_dbg_dynamic-x86_64.dll!__asan::asan_malloc_usable_size(void const *,unsigned __int64,unsigned __int64)    Unknown
    clang_rt.asan_dbg_dynamic-x86_64.dll!_recalloc()    Unknown
    ucrtbased.dll!_register_onexit_function::__l2::<lambda>() Line 112  C++
    ucrtbased.dll!__crt_seh_guarded_call<int>::operator()<void <lambda>(void),int <lambda>(void) &,void <lambda>(void)>(__acrt_lock_and_call::__l2::void <lambda>(void) && setup, _register_onexit_function::__l2::int <lambda>(void) & action, __acrt_lock_and_call::__l2::void <lambda>(void) && cleanup) Line 204    C++
    ucrtbased.dll!__acrt_lock_and_call<int <lambda>(void)>(const __acrt_lock_id lock_id, _register_onexit_function::__l2::int <lambda>(void) && action) Line 980    C++
    ucrtbased.dll!_register_onexit_function(_onexit_table_t * table, int(*)() function) Line 149    C++
    Qt5Cored.dll!_onexit(int(*)() function) Line 267    C++
    Qt5Cored.dll!atexit(void(*)() function) Line 275    C++
    Qt5Cored.dll!QPropertyAnimation::updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState) Line 268   C++
    Qt5Cored.dll!QAbstractAnimationPrivate::setState(QAbstractAnimation::State newState) Line 991   C++
    Qt5Cored.dll!QAbstractAnimation::start(QAbstractAnimation::DeletionPolicy policy) Line 1362 C++
    Qt5Widgetsd.dll!QWidgetAnimator::animate(QWidget * widget, const QRect & _final_geometry, bool animate) Line 114    C++
    Qt5Widgetsd.dll!QToolBarAreaLayout::apply(bool animate) Line 936    C++
    Qt5Widgetsd.dll!QMainWindowLayoutState::apply(bool animated) Line 687   C++
    Qt5Widgetsd.dll!QMainWindowLayout::applyState(QMainWindowLayoutState & newState, bool animate) Line 2759    C++
    Qt5Widgetsd.dll!QMainWindowLayout::setGeometry(const QRect & _r) Line 1979  C++
    Qt5Widgetsd.dll!QLayoutPrivate::doResize() Line 596 C++
    Qt5Widgetsd.dll!QLayout::activate() Line 1119   C++
    Qt5Widgetsd.dll!QWidgetPrivate::setVisible(bool visible) Line 8083  C++
    Qt5Widgetsd.dll!QWidget::setVisible(bool visible) Line 8044 C++
    Qt5Widgetsd.dll!QWidget::show() Line 7670   C++
    QtWidgetsApplication1.exe!main(int argc, char * * argv) Line 9  C++
    QtWidgetsApplication1.exe!WinMain(HINSTANCE__ * __formal, HINSTANCE__ * __formal, char * __formal, int __formal) Line 97    C++
    QtWidgetsApplication1.exe!invoke_main() Line 107    C++
    QtWidgetsApplication1.exe!__scrt_common_main_seh() Line 288 C++
    QtWidgetsApplication1.exe!__scrt_common_main() Line 331 C++
    QtWidgetsApplication1.exe!WinMainCRTStartup(void * __formal) Line 17    C++
    kernel32.dll!BaseThreadInitThunk()  Unknown
    ntdll.dll!RtlUserThreadStart()  Unknown

输出:

Address 0x01c416f8eda0 is a wild pointer.
SUMMARY: AddressSanitizer: bad-malloc_usable_size (C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\bin\HostX86\x64\clang_rt.asan_dbg_dynamic-x86_64.dll+0x18004e63a) in _asan_wrap_GlobalSize+0x4b948
Address Sanitizer Error: bad-malloc_usable_size

Answer 1

问题是 加载订单 .
Qt 恰好在 ASan 之前加载，并在 ASan DLL 加载之前加载 C/C++ 运行时。 Qt 执行一些初始化。所以内存是malloc在没有 ASan 知识的情况下编辑，后来 ASan 看到 realloc没有事先malloc ，它报告。
使用 ASan 构建 Qt 应该可以解决问题，我还没有尝试过，因为我找到了一种不涉及 Qt 重建的解决方法。
解决方法:只需让 Qt DLL 导入 ASan DLL。对我来说，它是通过以下命令:

setdll /d:clang_rt.asan_dbg_dynamic-x86_64.dll <path_to_deployed_debug_app>\Qt5Cored.dll

setdll /d:clang_rt.asan_dynamic-x86_64.dll <path_to_deployed_release_app>\Qt5Core.dll

setdll是来自 Detours 库的工具，可以从 https://github.com/microsoft/Detours 获得然后使用 nmake 构建. clang_rt.asan_dynamic-x86_64.dll和 clang_rt.asan_dbg_dynamic-x86_64.dll应该可以直接或从 %path% 获得执行此操作时，最方便的方法是从 VS Tools 命令提示符执行命令。