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 On Thu, Feb 28, 2019 at 2:50 PM Alan Somers <asom...@freebsd.org> wrote: > > On Sat, Feb 23, 2019 at 2:14 PM Matt Macy <mm...@freebsd.org> wrote: > > > > Author: mmacy > > Date: Sat Feb 23 21:14:00 2019 > > New Revision: 344487 > > URL: https://svnweb.freebsd.org/changeset/base/344487 > > > > Log: > > gcov support > > > > add gcov support and export results as files in debugfs > > > > Reviewed by: hps@ > > MFC after: 1 week > > Sponsored by: iX Systems > > Differential Revision: https://reviews.freebsd.org/D19260 > > > > Added: > > head/sys/gnu/gcov/ > > head/sys/gnu/gcov/gcc_4_7.c (contents, props changed) > > head/sys/gnu/gcov/gcov.h (contents, props changed) > > head/sys/gnu/gcov/gcov_fs.c (contents, props changed) > > head/sys/gnu/gcov/gcov_subr.c (contents, props changed) > > Modified: > > head/sys/conf/files > > head/sys/conf/kern.mk > > head/sys/conf/kern.post.mk > > head/sys/conf/kern.pre.mk > > head/sys/conf/kmod.mk > > head/sys/conf/options > > On a more practical note, how does one use this new feature? It looks > like it could be quite useful. > -Alan _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
