Handling pgoff in perf elf mmap/mmap2 elf info

Mark Wielaard mark@klomp.org
Mon Oct 15 21:05:00 GMT 2018


Hi Milian,

On Mon, 2018-10-15 at 22:38 +0200, Milian Wolff wrote:
> here's one example of mmap events recorded by perf:
> 
> 0x7fac5ec0b000 to 0x7fac5ed9a000, len =   0x18f000, offset =                0   
> r--p    /usr/lib/libstdc++.so.6.0.25
> 0x7fac5ec94000 to 0x7fac5ed8a000, len =    0xf6000, offset =          0x89000   
> ---p    /usr/lib/libstdc++.so.6.0.25
> 0x7fac5ec94000 to 0x7fac5ed4c000, len =    0xb8000, offset =          0x89000   
> r-xp    /usr/lib/libstdc++.so.6.0.25
> 0x7fac5ed4c000 to 0x7fac5ed89000, len =    0x3d000, offset =         0x141000   
> r--p    /usr/lib/libstdc++.so.6.0.25
> 0x7fac5ed8a000 to 0x7fac5ed97000, len =     0xd000, offset =         0x17e000   
> rw-p    /usr/lib/libstdc++.so.6.0.25

Could you also post the matching phdr output for the file?
eu-readelf -l /usr/lib/libstdc++.so.6.0.25 should show it.
That way we can see how the PT_LOAD segments map to the mmap events.

Thanks,

Mark


More information about the Elfutils-devel mailing list