Re: perf TUI fails with "failed to process type: 64"

From: Anton Blanchard
Date: Mon Oct 10 2016 - 06:19:02 EST


Hi Michael,

> > 14c00-14c00 g exc_virt_0x4c00_system_call
> ^
> What's this? The address? If so it's wrong?

Offset into the binary I think, there's one 64kB page of ELF gunk at
the start.

> Seems likely. But I can't see why.
>
> AFAICS we have never emitted a size for those symbols:
>
> Old:
> $ nm --print-size build/vmlinux | grep -w system_call_relon_pSeries
> c000000000004c00 T system_call_relon_pSeries
>
> New:
> $ nm --print-size build/vmlinux | grep -w exc_virt_0x4c00_system_call
> c000000000004c00 T exc_virt_0x4c00_system_call
>
>
> It also doesn't look like we're emitting another symbol with the same
> address, which has caused confusion in the past:
>
> Old:
> c000000000004c00 T exc_virt_0x4c00_system_call
> c000000000004d00 T exc_virt_0x4d00_single_step
>
> New:
> c000000000004c00 T system_call_relon_pSeries
> c000000000004d00 T single_step_relon_pSeries
>
> So more digging required.

Thanks for checking, it's starting to sound like a perf bug.

Anton