[Webkit-unassigned] [Bug 55728] [fileapi] Worker File API calls that create Blobs fail in debug builds due to random number generator thread assertion

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=55728





--- Comment #38 from Michael Nordman <michaeln at google.com>  2011-05-17 13:57:49 PST ---
> > This may be a good place for judicious use of PLATFORM(CHROMIUM).
> 
> Sounds good to me.

Based on comment #32, looks like setting ENABLE_WTF_MULTIPLE_THREADS does have bad consequences for chromium on linux. A more focused change right now to get rid of the particular ASSERTION we're running into would be to not set that flag, and instead poke directly at CryptographicallyRandomNumber.cpp.

#if ENABLE(WTF_MULTIPLE_THREADS) || PLATFORM(CHROMIUM)
#define THREAD_SAFE_ARC4_RAND 1
#endif

class ARC4RandomNumberGenerator {
public:
    ARC4RandomNumberGenerator();

    uint32_t randomNumber();
    void randomValues(void* buffer, size_t length);

private:
    inline void addRandomData(unsigned char *data, int length);
    void stir();
    void stirIfNeeded();
    inline uint8_t getByte();
    inline uint32_t getWord();

    ARC4Stream m_stream;
    int m_count;
#if THREAD_SAFE_ARC4_RAND
    Mutex m_mutex;
#endif
};

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