Hi, On 5 September 2013 15:33, Jean Pihet <jean.pi...@linaro.org> wrote: > On 5 September 2013 15:19, Will Deacon <will.dea...@arm.com> wrote: >> On Thu, Sep 05, 2013 at 02:17:30PM +0100, Ard Biesheuvel wrote: >>> On 5 September 2013 15:05, Jean Pihet <jean.pi...@newoldbits.com> wrote: >>> [..] >>> > Here are the commands I have been using: >>> > perf record -g dwarf -- <binary to profile> >>> > perf report --sort symbol --call-graph --stdio >>> > >>> >>> Ah, I failed to add the 'dwarf' after -g, however, in that case, my >>> perf report segfaults: >> >> Same SEGV here. > Ouch! I never got the segfault on my side.
The segfault is caused by libunwind. With the latest version [1], dwarf unwinding works fine. Investigation on-going, more to come! [1] git://git.sv.gnu.org/libunwind.git Regards, Jean > > Here is the setup I am using: > - OMAP4 Pandaboard, > - 13.07 Ubuntu dist from http://www.linaro.org/downloads/, > - 3.11 mainline kernel + 3 patches for unwinding info, > - patched perf tool, > - dbg flavor of the libs installed. Without them installed I do not > get the address resolved but no segfaults > > Can you check if the linked libraries contain the .debug_frame > sections? (ldd; readelf -S /lib/arm-linux-gnueabihf/libc-2.17.so|grep > debug_frame; readelf -S > /usr/lib/debug/lib/arm-linux-gnueabihf/libc-2.17.so|grep debug_frame)? > >> >> Will > > Jean -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
