Re: [DynInst_API:] Dyninst Issue with C++11 chrono

[Xiaozhu Meng <xmeng@xxxxxxxxxxx>]

Hi Zongyao,

I am sorry for the late response.Â

I downloaded your code but I was not able to reproduce your error. I compiled your mutator and mutatees, and the rewritten chrono mutatee executed normally without any segment fault. I am using a fresh clone of the master branch on Github. Which Dyninst version are you using?

I observed a different issue from your code. The counter value for counting how many times the interesting procedure got called seems wrong. I am still investigating it.

Thanks,

--Xiaozhu

On Fri, Apr 14, 2017 at 1:42 AM, ååè <zongyao.zhang@xxxxxxxxxxxxxx> wrote:

Hi Doctors & experts:

  I found an issue with Dyninst handling C++ 11 chrono library calls:

    If I use chrono system calls in my code, Dyninst cannot work, the error is "segment fault" when I run the application which is instrumented.

    If I remove chrono system calls and the header of chrono, the instrumented application runs ok.

   Â

  Here is the code and steps to reproduce this problem:

    1, Download the package to a Ubuntu system(14.04LTS)

    2, Open a terminal and set the environment for Dyninst:

      export DYNINST_ROOT=/xxx/xxx/dyninst (the path of installed dyninstï

      export export DYNINSTAPI_RT_LIB=/usr/local/lib/libdyninstAPI_RT.so

    3, go to the directory "build"

    4, execute commands:

        cmake ..

        make

    5, you can see two executables are generated: chrono and without_chrono; you can run these two executalbes without any issue.

    6, now start instrumention by Dyninst:

        ./binst without_chrono out_without_chrono     // "out_without_chrono" is generated.

        ./out_without_chrono   //no error occurs.

       Â

        ./binst chrono out_chrono  Â// "out_chrono" is generated.

        run ./out_chrono

        "Segment fault. core dumped".

If you have any idea or answer, please do let me know.

Thanks,

Zongyao

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