[Webkit-unassigned] [Bug 42448] crash in JSC::UString::toUInt32(bool * ok, bool tolerateEmptyString=true)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=42448





--- Comment #4 from stawel at gmail.com  2010-07-23 07:47:21 PST ---
I made some research,
here is an example (for linux, and windows)

I guess that some other library turns on the 
fp exceptions. 


///example.cpp
#include <iostream>
#include <limits>
#include <fpu_control.h>


using namespace std;

int main(int argc, char* argv[])
{

        //  on winodws
        //    _control87 (0, _EM_INVALID);

        // on linux gcc 4.2.4
        fpu_control_t fpu_cw;
        fpu_cw = _FPU_DEFAULT & (~_FPU_MASK_IM);
        _FPU_SETCW(fpu_cw);


        double d;
        // each of them work
        d = numeric_limits<double>::infinity();
        d = numeric_limits<double>::quiet_NaN();
        d = numeric_limits<double>::signaling_NaN();

        if(d != static_cast<uint32_t>(d)) {   // exception
                cout << "error\n" ;
        } else {
                cout << "ok\n";
        }

        return 0;
}

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