[UNREAL][WINDOWS] Attach to any LLDB

[simdax]

Hello!

Unreal Engine support for llvm is quite thin today. It's possible to build it with clang, but launching with lldb don't allow us to attach a breakpoint.
Actually, there is one way, quiete strange : to use the shipped LLDB with JetBrain's Rider, who use LLDB to debug Unreal.
Indeed, their lldb is working for me.

I'm trying to attach it to vscode, without success today.
Giving the actual path of the rider's liblldb.dll don't work because, their version is 9 :(

briefly, what would be the quickest way to get this working LLDB to vscode ?? Is your plugin possible ?

Thanks :)

[vadimcn]

No, CodeLLDB requires at least liblldb v10.

[simdax]

OK. So my problem is different today :)

In fact, if I build LLVM myself, it works! So the problem disappears.
I just see that the performances are not good at al, I will investigate further to see if it's related to the plugin. Maybe I'll have to rebuild lldb-vscode with it ?

[simdax]

OK, using lldb from terminal is OK. The problem is now that I cannot attach a breakpoint anymore

[2022-11-18T11:45:35.216Z DEBUG codelldb::dap_codec] --> {"command":"setBreakpoints","arguments":{"source":{"name":"DNEFootstepSoundSubsystem.cpp","path":"e:\\dev\\DNE\\Plugins\\GameSystem\\DNEFootstep\\Source\\DNEFootstep\\Private\\SoundTable\\DNEFootstepSoundSubsystem.cpp"},"lines":[],"breakpoints":[],"sourceModified":false},"type":"request","seq":12}
[2022-11-18T11:45:35.217Z DEBUG codelldb::dap_codec] <-- {"seq":2783,"type":"response","request_seq":12,"success":true,"command":"setBreakpoints","body":{"breakpoints":[]}}
[2022-11-18T11:45:35.217Z DEBUG codelldb::debug_session] Debug event: 000002232DBEA490 Event: broadcaster = 000002230F698A08 (lldb.target), type = 0x00000001 (breakpoint-changed), data = {}
[2022-11-18T11:45:35.217Z DEBUG codelldb::debug_session] Debug event: 000002232DBEA390 Event: broadcaster = 000002230F698A08 (lldb.target), type = 0x00000001 (breakpoint-changed), data = {}
[2022-11-18T11:45:37.537Z DEBUG codelldb::dap_codec] --> {"command":"setBreakpoints","arguments":{"source":{"name":"DNEFootstepSoundSubsystem.cpp","path":"e:\\dev\\DNE\\Plugins\\GameSystem\\DNEFootstep\\Source\\DNEFootstep\\Private\\SoundTable\\DNEFootstepSoundSubsystem.cpp"},"lines":[206],"breakpoints":[{"line":206}],"sourceModified":false},"type":"request","seq":13}
[2022-11-18T11:45:37.538Z DEBUG codelldb::debug_session] Debug event: 000002232DBEA490 Event: broadcaster = 000002230F698A08 (lldb.target), type = 0x00000001 (breakpoint-changed), data = {}
[2022-11-18T11:45:37.538Z DEBUG codelldb::dap_codec] <-- {"seq":2784,"type":"response","request_seq":13,"success":true,"command":"setBreakpoints","body":{"breakpoints":[{"id":4,"message":"Resolved locations: 0","verified":false}]}}

The point exist, but the location is not resolved (it is with the shipped LLDB, and I can attach by terminal

)

I have this at startup
Could not initialize Python interpreter - some features will be unavailable (e.g. debug visualizers).