Even if Python itself is the standard distribution, you should be able to debug your outside DLL module in VS just by putting a breakpoint on your favorite line and setting "/path/to/python.exe -m yourmodule" as the command path under debugging in your project properties, or whatever commandline accomplishes whatever initialization you need to test. Multiprocessing might be something else entirely, I don't know, I've only debugged DLLs in-process. As soon as your breakpoint is hit, it'll stop as you'd expect, even though you started something else entirely.
-Em On Wed, Dec 16, 2020 at 4:56 PM <pjfarl...@earthlink.net> wrote: > Yes, that is my specific issue. I have a C DLL invoked by a python > wrapper module using ctypes that has at least one issue (and likely more > than one) so I need to be able to start a python test script and debug the > lower-level DLL code. The C test programs for the lower-level C DLL all > seen to succeed, so I am suspecting something is wrong in the wrapper code. > > If anyone has or knows of step-by-step instructions on how to set that > debug environment up and start the outer-level script with debug > breakpoints in the DLL I would greatly appreciate it. I'm also doing my > own searches for tutorials on debugging python with VS20xx, but have not > read/viewed one of those yet. > > I have in fact been able to re-compile cpython and the lower-level DLL > using the VS2019 command line tools, but so far my only debugging > capability has been to insert fprintf's to a trace file in the lower-level > DLL code (or macros that result in such output) into the C code where I > *think* the problem is happening, but I have not been able to nail it down > yet. Being able to start the process from the IDE and catch any C errors > when they happen would be ideal. > > My environment is Win10-64 and python 3.8.5. > > Peter > > > -----Original Message----- > > From: Paul Moore <p.f.mo...@gmail.com> > > Sent: Wednesday, December 16, 2020 2:20 PM > > To: pjfarl...@earthlink.net > > Cc: Python Dev <python-dev@python.org> > > Subject: Re: [Python-Dev] Advice / RTFM needed for tool setup to > participate in > > python development from a Windows host > > > > Personally, I just have Visual Studio and VS Code as my text editor. I > > rarely use Visual Studio directly, though, I mostly use the > > `build.bat` and similar scripts in the `PCBuild` directory. > > > > Having said that, I'm not doing anything like debugging problems with > > DLLs, for which I imagine a decent C development environment is > > needed. You don't have much choice other than Visual Studio there (no > > other compiler is supported on Windows), though, so you'll probably > > need to learn that. > > > > Paul > > > > On Wed, 16 Dec 2020 at 18:28, <pjfarl...@earthlink.net> wrote: > > > > > > Hello, > > > > > > I hope this is the correct place to ask this question. I have a > desire to > > > participate in python development in a particular area from my Windows > host > > > machine, but I am not finding any concise listing of the tool setup > needed > > > to fully participate, nor any detailed guidance on how to proceed when > > > underlying code debugging is necessary. > > > > > > I do know that some version of the MS VS20xx suite is necessary to > begin. > > > My initial attempts using the VS2019 Community Edition have been less > than > > > successful when it comes to debugging an underlying C library component > > when > > > the starting program is python because I have not figured out how to > use the > > > VS2019 environment to do that. > > > > > > So I would appreciate any RTFM / URL that can guide me in starting to > > > participate, especially for guidance on debugging procedures for > underlying > > > C components when the initial program is a python script. > > > > > > I have read most of the "Python Developers Guide" material, but there > is not > > > any Window-specific tooling information that I have seen there yet. > What > > > other tooling do I need besides a VS20xx environment? > > > > > > I do have good experience in C programming, but not much in using > VS20xx > > > IDE's. > > > > > > TIA for your gentle guidance in curing my ignorance. > > > > > > Peter > -- > _______________________________________________ > Python-Dev mailing list -- python-dev@python.org > To unsubscribe send an email to python-dev-le...@python.org > https://mail.python.org/mailman3/lists/python-dev.python.org/ > Message archived at > https://mail.python.org/archives/list/python-dev@python.org/message/H4MZYLFFB4EF6ZMMXE4FYH7KJRKNE3ZS/ > Code of Conduct: http://python.org/psf/codeofconduct/ >
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