Date: Thu, 28 Feb 2019 20:10:50 -0700 From: Alan Somers <asomers@freebsd.org> To: Matthew Macy <mmacy@freebsd.org> Cc: src-committers <src-committers@freebsd.org>, svn-src-all <svn-src-all@freebsd.org>, svn-src-head <svn-src-head@freebsd.org> Subject: Re: svn commit: r344487 - in head/sys: conf gnu/gcov Message-ID: <CAOtMX2j5tFdapsHr3WwVAG3PjUNBuuvoZSiy9L=_7c925M=zRQ@mail.gmail.com> In-Reply-To: <CAPrugNrnKeDkqsqDtPyTCsPBK6rUsAThog1KO1u3FPCGihD3sw@mail.gmail.com> References: <201902232114.x1NLE0cH085345@repo.freebsd.org> <CAOtMX2hD=o%2BF1z1sErDuBxaL8qm%2BS-BDAwvLr=1z0MhmAJ8ang@mail.gmail.com> <CAPrugNrnKeDkqsqDtPyTCsPBK6rUsAThog1KO1u3FPCGihD3sw@mail.gmail.com>
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On Thu, Feb 28, 2019 at 6:40 PM Matthew Macy <mmacy@freebsd.org> wrote: > > to config add: > options LINDEBUGFS > options GCOV > > compile kernel with gcc (otherwise it will be a no-op) > > sysctl debug.gcov.enable=1 > > mount -t debugfs debugfs /sys/kernel/debug > > (or wherever) and the output artifacts will appear under gcov/<kernel > build path> - you need to be root to see the artifacts > > gcov can then generate the results as it would normally from the > profiling and the build time artifacts > > bug reports welcome > > > -M Here's a bug report: I rebuilt the kernel but boot fails with this error. Do I need to rebuild world too? Mounting local filesystems:kldload: fdescfs.ko: lost base for reltab linker_load_file: /boot/kernel/fdescfs.ko - unsupported file type mount: fdescfs: Operation not supported by device Mounting /etc/fstab filesystems failed, will retry after root mount hold release kldload: fdescfs.ko: lost base for reltab linker_load_file: /boot/kernel/fdescfs.ko - unsupported file type mount: fdescfs: Operation not supported by device . Mounting /etc/fstab filesystems failed, startup aborted
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