Hi,
On 5 September 2013 15:33, Jean Pihet jean.pihet@linaro.org wrote:
On 5 September 2013 15:19, Will Deacon will.deacon@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.pihet@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