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
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