(2014/08/15 10:07), Arnaldo Carvalho de Melo wrote: > Em Thu, Aug 14, 2014 at 01:07:28PM -0700, Brendan Gregg escreveu: >> On Thu, Aug 14, 2014 at 11:29 AM, Masami Hiramatsu >> <[email protected]> wrote: >> [...] >>> The "rebuild with ..." part changes to "rebuild with CONFIG_DEBUG_INFO" >>> if the target is the kernel or a kernel module. > >> Thanks, definitely an improvement! Should the kernel message also >> mention kernel debuginfo packages? Depends on the distribution and >> environment, but I think for some users the solution is to add the >> package.
I see, and at least fedora/rhel has debuginfo for all packages. So, not only for the kernel, but also for user applications, we'll need to do that. > Yeah, something like what is suggested by gdb and documented here: > > https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Developer_Guide/intro.debuginfo.html > > -------------------------------------------------------------------- > In some cases (such as loading a core file), GDB does not know the > name, version, or release of a name-debuginfo-version-release.rpm > package; it only knows the build-id. In such cases, GDB suggests a > different command: > > gdb -c ./core > [...] > Missing separate debuginfo for the main executable filename > Try: yum --disablerepo='*' --enablerepo='*debug*' install > /usr/lib/debug/.build-id/ef/dd0b5e69b0742fa5e5bad0771df4d1df2459d1 > --------------------------------------------------------------------- ah, that's nice :) > > This is something I want to have eventually, i.e. to have per distro > plugins to automatically download packages required for some features, > like probing and annotation, for instance. Yeah, however, it depends on the distro. AFAIK, ubuntu provides debuginfo package only for the kernel. So, at this point, I think what we can do is just say "please install debuginfo package" as below. $ ./perf probe -x perf -L argv_split The /home/fedora/ksrc/linux-3/tools/perf/perf file has no debug information, rebuild with -g. Or install appropriate debuginfo package. Error: Failed to show lines. Thank you, -- Masami HIRAMATSU Software Platform Research Dept. Linux Technology Research Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: [email protected] -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
