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    SubjectRe: Memory corruption due to word sharing

    Jan Kara <> writes:
    > we've spotted the following mismatch between what kernel folks expect
    > from a compiler and what GCC really does, resulting in memory corruption on
    > some architectures. Consider the following structure:
    > struct x {
    > long a;
    > unsigned int b1;
    > unsigned int b2:1;
    > };

    If this structure were volatile, you could try
    -fstrict-volatile-bitfields, which forces GCC to use the C type to
    define the access width, instead of doing whatever it thinks is optimal.

    Note: that flag is enabled by default for some targets already, most
    notably ARM.

     \ /
      Last update: 2012-02-03 07:49    [W:0.019 / U:118.628 seconds]
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