Question

我在其中一个对话框上有CMFCShellTreeCtrl应用程序，并且在某些Win8机器上运行时崩溃了。它发生在树控制尝试初始化并在afxshelltreectrl.cpp的这一部分调用SHGetFileInfo时：

int CMFCShellTreeCtrl::OnGetItemIcon(LPAFX_SHELLITEMINFO pItem, BOOL bSelected)
{
    ENSURE(pItem != NULL);

    SHFILEINFO sfi;

    UINT uiFlags = SHGFI_PIDL | SHGFI_SYSICONINDEX | SHGFI_SMALLICON;

    if (bSelected)
    {
        uiFlags |= SHGFI_OPENICON;
    }
    else
    {
        uiFlags |= SHGFI_LINKOVERLAY;
    }

    if (SHGetFileInfo((LPCTSTR)pItem->pidlFQ, 0, &sfi, sizeof(sfi), uiFlags))
    {
        return sfi.iIcon;
    }

    return -1;
}

应用程序是在Win7 32位上的VS2010中构建的。我无法在VM上复制此错误，因此我在客户端PC上远程调试。我比较了SHGetFileInfo函数的参数值，它们在我的机器和客户端上看起来都是一样的，除了内存地址。

异常后调用堆栈： screenshot

WinDbg日志：

ModLoad: 02b70000 02bc9000   cmd.exe 
ModLoad: 60780000 607ca000   C:\windows\SysWOW64\mscoree.dll
ModLoad: 60700000 6077a000   C:\Windows\Microsoft.NET\Framework\v4.0.30319\mscoreei.dll
ModLoad: 711b0000 71250000   C:\windows\SysWOW64\sxs.dll
ModLoad: 60150000 606ff000   C:\Windows\Microsoft.NET\Framework\v2.0.50727\mscorwks.dll
ModLoad: 70e30000 70ecb000   C:\windows\WinSxS\x86_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.6910_none_d089c358442de345\MSVCR80.dll
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\windows\WinSxS\x86_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.6910_none_d089c358442de345\MSVCR80.dll - 
ModLoad: 5f650000 6014a000   C:\windows\assembly\NativeImages_v2.0.50727_32\mscorlib\7f763721bf47dc8d58ec21cb64cbec91\mscorlib.ni.dll
ModLoad: 71770000 71778000   C:\Windows\Microsoft.NET\Framework\v2.0.50727\culture.dll
(c18.227c): CLR exception - code e0434f4d (first chance)
(c18.227c): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\windows\SysWOW64\combase.dll - 
eax=002d0068 ebx=80040154 ecx=04b1f654 edx=04b1f678 esi=0018b654 edi=76cbbda0
eip=002d0068 esp=0018b63c ebp=0018b648 iopl=0         nv up ei ng nz ac pe cy
cs=0023  ss=002b  ds=002b  es=002b  fs=0053  gs=002b             efl=00010297
002d0068 ??              ???

根据调用堆栈中的某些COM函数发生错误。我不熟悉COM，所以可能有人可以帮我找到SHGetFileInfo导致异常的原因。

Answer 1

c0000005是内存访问异常。在调用此函数之前检查您的pItem是否已初始化。或者您可以检查'pItem-＆gt; pidlFQ'是否有效。

SHGetFileInfo函数导致未处理的异常

1 个答案: