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    SubjectRe: libc/1427: gprof does not profile threads <synopsis of the problem (one li\ne)>
    Ulrich Drepper wrote:
    >
    > On Wed, 2002-03-13 at 15:17, Dan Kegel wrote:
    >
    > > So let's break the logjam and fix glibc's linuxthreads' pthread_create
    > > to [support profiling multithreaded programs]
    >
    > I will add nothing like this. The implementation is broken enough and
    > any addition just makes it worse. If you patch your own code you'll get
    > what you want at your own risk.

    OK. What's the right way to fix this, then?

    Here are a few alternate ideas off the top of my head:

    * Rip out Linuxthreads, replace it with NGPT, and
    start fixing from there? (Or does NGPT already fix this?)

    * Rewrite Linux's setitimer(ITIMER_PROF,...) to set up an
    interval timer for all threads of the thread group.

    * Implement the profil() system call from Solaris
    ( http://ua1vm.ua.edu/cgi-bin/man-cgi?profil+2 )

    What's your favorite idea for getting profiling of
    multithreaded programs working on Linux?

    Thanks,
    Dan
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