[cfe-dev] Debugging Clang with Visual Studio

[Michael Kruse via cfe-dev]

This would be an issue of the Visual Studio debugger, not of the
program you are debugging.

Like this is because when you launch clang, you are launching just the
driver which invokes itself as `clang -cc1` (although under some
conditions it invokes itself directly). Visual Studio does not debug
processes the

To see what happens, I suggest to start debugging using "step into"
(or set a breakpoint in main of driver.cpp) and continue from there.

Michael


Am Di., 14. Juli 2020 um 02:00 Uhr schrieb Shachaf Co via cfe-dev
<cfe-dev at lists.llvm.org>:
>
> Hi all,
>
> I Built Clang from source using Visual Studio in debug mode, and I'm trying to debug it.
> However, the debugger doesn't break on any breakpoint that I put.
> When I put breakpoints directly using __debugbreak(), clang just crashes with the even though the debugger is attached.
>
> (I'm sure that this code flow actually happens, as I added some llvm::errs to prove it)
>
> The original Cmake command was:
> cmake.exe -DLLVM_ENABLE_PROJECTS=clang -DLLVM_TARGETS_TO_BUILD=X86 -DLLVM_ENABLE_IDE=ON -G "Visual Studio 15 2017" -A x64 -Thost=x64 <path_to_llvm>
>
> Am I doing something wrong?
> Is there some other step that I'm missing?
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