GDB-Run Executable Doesn't Work (VS Code)

Question

I am using VS Code for a C++ Project. I am also using CMake Tools to manage the CMake side of things and my compiler toolchains.

I have two separate compiler kits - i686-w64-mingw32 and x86_64-w64-mingw32 (gcc version 10.1.0).

I have set the gdb.exe path in my launch.json to the path of the 64-bit gdb debugger. This works correctly and I can run and debug with breakpoints as expected.

However, when running the 32-bit executable with the 64-bit debugger, I get no output to my console whatsoever, and the breakpoint is not hit.

What could be the problem?

Brecht Sanders · Accepted Answer · 2020-06-16 08:16:27Z

1

Don't mix platforms. Debug the 32-bit executable with the 32-bit debugger.

answered Jun 16, 2020 at 8:16

Brecht Sanders

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6 Comments

Gary Allen Over a year ago

The 64-bit GDB is perfectly capable of debugging 32-bit executables. See here stackoverflow.com/questions/3931889/…. Unfortunately my current setting using CMake Tools makes it a bit of a mission to switch debuggers like that and I'd like to make everything as automated as possible.

Brecht Sanders Over a year ago

Have you tried doing this via command line? Do you get an error? If I try to debug a 32-bit process with 64-bit gdb I do see some warnings that match this: virtuallyfun.com/wordpress/2015/10/04/32bit-64bit-gdb-collision

Gary Allen Over a year ago

I have not yet, but I have re-asked this question with a detailed output log here: stackoverflow.com/questions/62404382/…. Side note - are you Brecht Sanders i.e. from Winlibs? I happen to be using your build of MinGW-w64! Haha, thanks very much. So if it isn't working for you then we are in exactly the same boat it seems? Why does that other link mention that it is possible? @brecht-sanders

Brecht Sanders Over a year ago

@gasko Yes, I'm the guy from winlibs.com where separating 32-bit and 64-bit toolchains completely is part of the philosophy in order to avoid any possible problems when the 2 get mixed up (as I noticed on stackoverflow happens a lot).

Gary Allen Over a year ago

Haha. I just got a reply on my other question stating that it is supported on Linux but not on Windows just yet, but will be for GDB version 10. Thanks for the help!

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