[DynInst_API:] Crash trying to use StackwalkerAPI

[Bryan Buck <brbuck2503di@xxxxxxxxxx>]

I'm trying to use the StackwalkerAPI in Dyninst 9.1.0, but I'm having some trouble getting started. I'm trying the example code from the manual, but it crashes when I call walkStack() on my Walker object. Does anyone know, is there some initialization I need to perform before using the example code from the manual? Specifically, I'm on Windows x86, using this example code to (try to) walk its own process' stack:

 

  std::vector<Frame> stackwalk;

  string s;

 

  Walker *walker=Walker::newWalker();

  walker->walkStack(stackwalk);

 

  for (unsigned i = 0; i < stackwalk.size (); i++) {

      stackwalk[i].getName(s);

      cout << "Found function" << s << endl;

  }

 

As I mentioned, it crashes in the walkStack(). For anyone familiar with the internals of Dyninst, I ask if I need to do some initialization because the crash is in x86-swk.C, in LookupFuncStart::allocatesFrame(), at the line:

 

  result = proc->getLibraryTracker()->getLibraryAtAddr(addr, lib);

 

It crashes because the result of proc->getLibraryTracker() is NULL. (Which means proc->library_tracker is NULL.) Am I not doing something that is supposed to fill this in?

 

I actually used to be a developer on Dyninst and knew these kinds of things, but I see it's changed a lot since I last worked on it! Thanks for any information anyone can give me.

 

- Bryan Buck