perf report can't resolve symbols; any recent build changes?

[Vyacheslav Egorov]

I've updated my 1 month old checkout and now perf report can't resolve
symbols.

All ticks coming from inside the chrome binary apparently are being
attributed to a single base address:

80.39% chrome [unknown] [.] 0x808711d
0.73% chrome ld-2.11.1.so [.] do_lookup_x
0.55% chrome [kernel.kallsyms] [k] page_fault

I am building with GYP_DEFINES=profiling=1 release_extra_cflags=-fno-
omit-frame-pointer linux_disable_pie=1 target_arch=ia32 (and running
on x64 Linux workstation) and this was fine before.

Is anybody aware of any recent changes that might have caused such
behavior?

Thanks.

--
Vyacheslav Egorov