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    SubjectRe: [PATCH -tip 6/7] perf bts trace: print function+offset
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    On Fri, 2010-12-03 at 13:00 +0900, Akihiro Nagai wrote:
    > Provide the function to print function+offset.
    > And, set it as the default behavior of 'perf bts trace'.
    > To use this function, users can also specify the option '-s' or '--symbol'.
    >
    > Example: 'perf bts -as trace'
    > This command prints address and function+offset.
    >
    > Output sample:
    > address function+offset
    > 0xffffffff8146fe0e irq_return+0x0 => 0x00007fd4038e3b20 _start+0x0
    > ...
    > 0x000000380661ee79 __libc_start_main+0xf9 => 0x00000000004035c3 main+0x0
    > 0xffffffff8146ef4e irq_return+0x0 => 0x00000000004035c3 main+0x0
    > 0x00000000004035e8 main+0x25 => 0x000000000040bca0 set_program_name+0x0
    > 0xffffffff8146ef4e irq_return+0x0 => 0x000000000040bca0 set_program_name+0x0
    > 0x000000000040bcae set_program_name+0xe => 0x00000000004023d0 strrchr@plt+0x0
    > 0x00000000004023d0 strrchr@plt+0x0 => 0x00000000004023d6 strrchr@plt+0x6
    > ...
    > 0x0000000000403e0c main+0x849 => 0x00000000004021f0 exit@plt+0x0
    > 0x00000000004021f0 exit@plt+0x0 => 0x00000000004021f6 exit@plt+0x6
    > 0x00000000004021fb exit@plt+0xb => 0x00000000004020d0 _init+0x18
    > 0x00000000004020d6 _init+0x1e => 0x00000038062149d0 _dl_runtime_resolve+0x0


    What would be very nice output is something like a source-code browser
    (tig might have something worth borrowing) and annotating the output
    using the bts output.

    You could for example darken the code that didn't get any coverage, and
    print a percentage for each conditional statement.

    That way you can easily see how your code is traversed.


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