Hi, We are using custom language say FileName.xyz which on precompilation preprocessing temporarily generates C++ files, which in turn is built to an executable (and PDB for temporary C++ files symbols). We want to Debug this Filename.xyz using exe and PDBs. the difference between FileName.xyz and generated FileName.cpp is that CPP file has additional code #include etc. in the beginning so 1st stmt in xyz may appear at 11th line in cpp to map line differences and filename at line 10th in FileName.cpp it puts #line 1 FileName.xyz is used to set __LINE and __FILE before 1st statement also each " custom language statement; " is inline replaced in CPP with their function definition " n-comma separated statements; " (same way as #define functions get replaced during pre-processing). In Visual Studio 2019: How Can I debug FileName.xyz (place brakepoint, check variable values/callstack, F9, F10, F11, Shift+F11) using standard C++ debugger with exe and generated pdbs for C++ file? I need some explicit mapping for .xyz file to debugger, and .xyz to .cpp pdbs, but what exactly not sure and how? do I need Custom debugger for this?

How to debugger for custom language generating C++ during preprocessingin VS2019?

Peeyush Chaurasia 0

Hi,

We are using custom language say FileName.xyz which on precompilation preprocessing temporarily generates C++ files, which in turn is built to an executable (and PDB for temporary C++ files symbols).

We want to Debug this Filename.xyz using exe and PDBs.

the difference between FileName.xyz and generated FileName.cpp is that

CPP file has additional code #include etc. in the beginning so 1st stmt in xyz may appear at 11th line in cpp
to map line differences and filename at line 10th in FileName.cpp it puts #line 1 FileName.xyz

is used to set __LINE and __FILE before 1st statement

also each "custom language statement;" is inline replaced in CPP with their function definition "n-comma separated statements;" (same way as #define functions get replaced during pre-processing).

In Visual Studio 2019:

How Can I debug FileName.xyz (place brakepoint, check variable values/callstack, F9, F10, F11, Shift+F11) using standard C++ debugger with exe and generated pdbs for C++ file?
I need some explicit mapping for .xyz file to debugger, and .xyz to .cpp pdbs, but what exactly not sure and how?
do I need Custom debugger for this?

Tianyu Sun-MSFT 30,566 Reputation points Microsoft Vendor

2023-03-21T07:05:08.82+00:00

Hello @Peeyush Chaurasia ,

Welcome to Microsoft Q&A forum.

Not very sure about the relationship between your .xyz file and the generated C++ files. Did you use a custom compiler to let the .xyz file to generate the C++ files? If so, using "#line directive" should work(step into the .xyz file) when you debug the generated C++ files.
Peeyush Chaurasia 0 Reputation points

2023-03-28T06:00:26.2366667+00:00

Thanks @Tianyu Sun-MSFT

I'm using custom compiler to separately 1st preprocess precompile FileName.xyz to FileName.cpp temporary file
then calling VS's build system CL.exe and Link.exe to genrate FileName.obj, FileName.pdb and linked FileName.exe

using #line 1 FileName.xyz
I'm now able Debug FileName.xyz using FileName.pdb and FileName.exe.

New Challenge is Edit And Continue feature is detecting xyz file changes but not able to compile FileName.xyz .

Edit and Continue : error : The dependency information for 'FileName.xyz' in the state (.idb) file(s) '' is out of sync with the Program Database (.pdb) file 'C:\Projects\FileName.pdb' for 'FileName.exe'. Ensure that the file is compiled with the Enable Minimal Rebuild (/Gm) option.

I'm building project with EditAndContinue, /Gm (minimum rebuild) settings already. Even providing Custom Compiler command for FileName.xyz and make it participates in build=yes. But EditAndContinue still not triggering Custom build of FileName.xyz.

FileName.xyz Custom Build Command:

"c:\MyCompiler.exe" "c:\projects\FileName.xyz"

FileName_EnC.bat

Any Input?

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How to debugger for custom language generating C++ during preprocessingin VS2019?

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