Re: [Qemu-devel] gcc auto-omit-frame-pointer vs msvc longjmp

[xunxun <xunxun1982@gmail.com>]

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Hi, all

     It seems that gcc's auto-omit-frame-pointer has other problems.

     The example is from mingw bug tracker: 
http://sourceforge.net/tracker/?func=detail&aid=3426555&group_id=2435&atid=102435

     g++ -O3 main.cpp       running will crash.
     g++ -O2 main.cpp       running no crash.
     g++ -O3 -fno-omit-frame-pointer    running no crash.

     I don't know in the end which optimize option defaultly contains 
this switch "-fomit-frame-pointer" on i686-pc-mingw32 or x86_64-w64-mingw32?

-- 
Best Regards,
xunxun


[-- Attachment #2: main.cpp --]
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#include <vector>

typedef void (*Func)(char*);

bool lie = false;
Func dummy = 0;

void moveToWindowsRecycler(const std::vector<int>& filesToDelete = std::vector<int>())  //throw FileError
{
    if (!lie)
        throw 1;

    char errorMessage[20000];

    Func fun = lie ?  dummy : 0;
    fun(errorMessage);

    std::vector<int> fileNames;

    for (std::vector<int>::const_iterator iter = filesToDelete.begin(); iter != filesToDelete.end(); ++iter)
        fileNames.push_back(*iter);
}

void wgfdfsdgfsdgfsdg()  //throw FileError
{
    ::moveToWindowsRecycler();  //throw FileError
}

int main()
{
    try
    {
        moveToWindowsRecycler()  ;//throw FileError
    }
    catch (...) {}

    return 0;
}