MSVC 中的 Address Sanitizer:为什么启动时报告错误?

Ale*_*iev 5 c++ qt visual-c++ address-sanitizer

我正在尝试一个使用 Qt 和 MSVC 2019 以及 Address Sanitizer 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。

qRegisterResourceData它在资源初始化(在调用堆栈中)时在 Qt 内部崩溃。

这是:

  • 滥用地址清理程序,例如,我也应该用它重建 Qt DLL?
  • Qt 中的一个问题我应该更深入地调查?
  • 已知的 Qt 问题?

我已经在默认情况下由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
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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
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Ale*_*iev 8

问题是加载顺序

Qt 恰好在 ASan 之前加载,并在加载 ASan DLL 之前加载 C/C++ 运行时。Qt 执行一些初始化。因此,记忆是malloc在没有 ASan 知识的情况下编辑的,后来 ASanrealloc在没有先验的情况下看到了malloc它的报告。

使用 ASan 构建 Qt 应该可以解决该问题,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,这是通过以下命令:

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
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setdll是 Detours 库中的一个工具,可以从https://github.com/microsoft/Detours获取,然后使用nmake.

clang_rt.asan_dynamic-x86_64.dll并且clang_rt.asan_dbg_dynamic-x86_64.dll应该可以直接使用或在%path%执行此命令时使用,最方便的方法是从 VS Tools 命令提示符执行该命令。