c++ - libc symbols not resolved in perf report -


the perf report output showing hex values libc symbols. have been searched around high , low, still don’t have clue why of them not resolved.

-  6%     test         libc-2.12.so                [.] vfprintf                                                                                                                                                        ◆    - vfprintf                                                                                                                                                                                                     ▒       - 95.44% _io_vsnprintf                                                                                                                                                                                      ▒            30.64% 0                                                                                                                                                                                               ▒            15.81% 0x7c4548                                                                                                                                                                                        ▒            6.99% 0x536e6f4e746c75                                                                                                                                                                                 ▒                                                                                                                                                                                ▒       - 3.83% _io_vsprintf                                                                                                                                                                                        ▒            21.05% 0x39393443443838                                                                                                                                                                                ▒

system x86_64 linux box, kernel release 3.2.45. compiler flag -fno-omit-frame-pointer added. libc6-dbg package installed.

as can see, _io_vsnprintf , _io_vsprintf resolved, not second level symbols. don’t know perf or libc explain this. feedback appreciated.

thanks!


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