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    SubjectRe: Valgrinding the kernel?
    Jeff Dike wrote:
    > Don't think so. With what I get on FC5 (valgrind-3.1.0), I get this:
    >
    > ==31913== Jump to the invalid address stated on the next line
    > ==31913== at 0x9: ???
    > ==31913== by 0xBEC1599A: ???
    > ==31913== by 0x696C2F69: ???
    > ==31913== Address 0x9 is not stack'd, malloc'd or (recently) free'd
    > ==31913==
    > ==31913== Process terminating with default action of signal 11 (SIGSEGV): dumping core
    >
    > UML is cloning a thread in order to test the host's ptrace. However,
    > it looks like valgrind is branching to 0x9 for some reason.
    >

    How far into the run does this happen? Immediately, or after a while?

    > This particular bit is going to be problematic for other reasons, but
    > if valgrind ever looks like it has a chance of working, I can work
    > around that in UML.
    >

    Hm. I haven't touched Valgrind in a couple of years, and I suspect
    people haven't been as mean to it as I was being. It might be time I
    gave it some love. (I've also been thinking about porting it to be a
    Xen guest so that we can Valgrind whole virtual machines - but that's a
    different story.)

    J
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