Btw the python tools project doesn't use Dbgeng extensibility model, it's a newer richer extensibility framework that is even less documented (most people probably wouldn't even know it exists) but much more powerful.  And it's all in managed code, so you get the c# stuff for free.<br><br>But still, 4-5 weeks seems very aggressive <br><div class="gmail_quote">On Tue, Apr 7, 2015 at 9:48 AM Colin Riley <<a href="mailto:colin@codeplay.com">colin@codeplay.com</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div bgcolor="#FFFFFF" text="#000000">
    You could try extending the codeview and then relying on the ms
    linker to emit a pdb from it (last time I checked it converts on the
    fly - this may have changed recently, and what it converts may not
    be fully featured). <br>
    <br>
    The Debug Engine extensibility for visual studio is, as Zach says,
    not well documented at all. Despite that, in the past I have had
    LLDB chatting in a limited way to visual studio. It was incredibly
    messy, and the way I chose to do it was go from Visual Studio ->
    c# -> c++/CLI -> C++ lldb api. Don't do it that way if you
    attempt it: Create lldb C# bindings instead and go that direction.
    I've been looking at that lately but it's a side project so cant be
    relied on if you need it quickly.<br>
    <br>
    As for the time frame, 4-5 weeks isn't going to get far given the
    lack of documentation. The debug engine samples don't go far enough
    in terms of requiring a native C++ environment.<br>
    <br>
    Colin</div><div bgcolor="#FFFFFF" text="#000000"><br>
    <br>
    <div>On 07/04/2015 17:25, Zachary Turner
      wrote:<br>
    </div>
    </div><div bgcolor="#FFFFFF" text="#000000"><blockquote type="cite">
      <div dir="ltr">It sounds like if you have a time frame of 4-5
        weeks, you've got a tall order cut out for yourself.  I don't
        want to say impossible, but... that's pretty rough.<br>
        <br>
        <div>I think you've got two options:</div>
        <div>1) Try to figure out how to emit PDB.  The format is
          undocumented, so you're kind of on your own here.</div>
        <div>2) Try to figure out how to get Visual Studio to understand
          DWARF.  Visual Studio has a reasonably rich extensibility
          model which is also not very well documented, so you're
          probably on your own here as well.  You may want to have a
          look at <a href="https://github.com/Microsoft/PTVS" target="_blank">PythonTools for
            Visual Studio</a>.  It's entirely open source and adds
          Python debugging to Visual Studio.  Obviously you don't need
          to be able to debug Python, but it's the best source of
          documentation I know of for extending Visual Studio in this
          kind of way so maybe it will help.  If you end up doing this,
          it would be great if you could try to upstream it back to
          LLDB.  Visual Studio integration with LLDB would be nice to
          have.</div>
      </div>
      <br>
      <div class="gmail_quote">On Mon, Apr 6, 2015 at 5:02 PM Rohan
        Bajaj <<a href="mailto:rohanbajaj84@gmail.com" target="_blank">rohanbajaj84@gmail.com</a>>
        wrote:<br>
        <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
          <div dir="ltr">
            <div>Moving to lldb-dev per suggestion.</div>
            <div><br>
            </div>
            <div>Using Visual Studio is only criteria for us. It could
              be DWARF or PDB.</div>
            <div><br>
            </div>
            <div>But I need to implement this soon (4-5 weeks from now).
              What do you recommend?</div>
            <div><br>
            </div>
            <div>Zachary do you also suggest using LLDB on Windows?</div>
            <div><br>
            </div>
          </div>
          <div class="gmail_extra"><br>
            <div class="gmail_quote">On Mon, Apr 6, 2015 at 4:35 PM,
              Zachary Turner <span dir="ltr"><<a href="mailto:zturner@google.com" target="_blank">zturner@google.com</a>></span>
              wrote:<br>
              <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                <div dir="ltr"><br>
                  <br>
                  <div class="gmail_quote"><span>On Mon, Apr 6, 2015 at
                      4:16 PM Chandler Carruth <<a href="mailto:chandlerc@google.com" target="_blank">chandlerc@google.com</a>>
                      wrote:<br>
                      <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid">
                        <div dir="ltr">
                          <div class="gmail_quote">On Mon, Apr 6, 2015
                            at 3:46 PM Rohan Bajaj <<a href="mailto:rohanbajaj84@gmail.com" target="_blank">rohanbajaj84@gmail.com</a>>
                            wrote:<br>
                            <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid">
                              <div dir="ltr">
                                <div>Is making PDB files for
                                  corresponding IR supported in LLVM
                                  latest version?</div>
                              </div>
                            </blockquote>
                            <div><br>
                            </div>
                          </div>
                        </div>
                        <div dir="ltr">
                          <div class="gmail_quote">
                            <div>Not today.</div>
                          </div>
                        </div>
                        <div dir="ltr">
                          <div class="gmail_quote">
                            <div> </div>
                            <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid">
                              <div dir="ltr">
                                <div><br>
                                </div>
                                <div>After some searching I see
                                  llvm-pdbdump, but I want to annotate
                                  the IR with debug information so that
                                  when I write bitcode it has pdb
                                  information.</div>
                                <div><br>
                                </div>
                                <div>I've heard of CodeView, but it
                                  seems to be only for line information.
                                  I want variable values also.</div>
                                <div><br>
                                </div>
                                <div>I would be ok to use DWARF if
                                  Visual Studio could understand it
                                  using LLDB but I don't know how to do
                                  that or if it is support.</div>
                              </div>
                            </blockquote>
                            <div><br>
                            </div>
                          </div>
                        </div>
                        <div dir="ltr">
                          <div class="gmail_quote">
                            <div>Zach (CC-ed) and others are actively
                              working on making LLDB work well on
                              Windows, including reading DWARF debug
                              information on Windows and potentially
                              integration with Visual Studio (although I
                              think that is further away at the moment).
                              However, further discussion might be
                              better on the LLDB mailing lists.</div>
                          </div>
                        </div>
                      </blockquote>
                      <div><br>
                      </div>
                    </span>
                    <div>It's worth pointing out that CodeView is
                      **not** only for line information. It's for
                      everything.  It's just that LLVM currently only
                      understands a subset of CodeView record types
                      related to line information.</div>
                    <div><br>
                    </div>
                    <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"></blockquote>
                  </div>
                </div>
              </blockquote>
            </div>
            <br>
          </div>
        </blockquote>
      </div>
      <br>
      <fieldset></fieldset>
      <br>
      </blockquote></div><div bgcolor="#FFFFFF" text="#000000"><blockquote type="cite"><pre>_______________________________________________
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</pre>
    </blockquote>
    <br>
    <pre cols="72">-- 
- Colin Riley
Senior Director,
Parallel/Graphics Debugger Systems
</pre>
  </div>

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