Symbols not decoded in 0.0.2.PERF

[Johan Tibell <johan.tibell@gmail.com>]

Hi,

I'm trying to use perf record/report on a non-stripped, Haskell binary
(i.e. compiled using GHC). Unfortunately, not all symbols are
decoded*:

    75.28%            bench  ./bench                    [.] 0x000000002b612b
     7.11%            bench  /lib/libc-2.11.1.so        [.] memcpy
     5.47%            bench  ./bench                    [.] 0x0000000000438f
     3.47%            bench  ./bench                    [.] allocate
     1.86%            bench  ./bench                    [.] s1Ol_info
     1.65%            bench  ./bench                    [.] s1Ok_info
     0.62%            bench  ./bench                    [.] memcpy@plt
     0.48%            bench  ./bench                    [.] clearNurseries
     0.33%            bench  ./bench                    [.] evacuate1
     0.24%            bench  ./bench                    [.] GarbageCollect

How can I figure out what 0x000000002b612b corresponds to?

perf version: 0.0.2.PERF (installed from Ubuntu package)
Kernel version: 2.6.32

$ cat /proc/cpuinfo
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 44
model name	: Intel(R) Xeon(R) CPU           X5650  @ 2.67GHz

* It could be the case that GHC is generating symbols that perf cannot
interpret somehow. If we can confirm this is the case we can try to
fix that.

-- Johan