[SR-8972] Expose the Host/Target current triple through the LLDB SB Python API

[pvieito]

Previous ID	SR-8972
Radar	rdar://problem/45217944
Original Reporter	@pvieito
Type	New Feature

Additional Detail from JIRA

Votes	0
Component/s	LLDB for Swift
Labels	New Feature
Assignee	None
Priority	Medium

md5: 28fd0e1a01f0f253b5531c37120a311f

Issue Description:

Right now there is no way to get the current host triple or architecture from the SB Python API.

[AnnaZaks]

@swift-ci create

[jasonmolenda]

Are you looking for the HOST triple? Or the target triple? e.g. lldb is running on a mac, debugging a process on a Linux system. I can see a usefulness to getting the triple for the Linux system. This would be similar to Target::GetArchitecture() and naturally live in SBTarget.

SBDebugger::{Get,Set}DefaultArchitecture exists but it's only useful in specialized circumstances.

[jasonmolenda]

Ah, I missed SBTarget::GetTriple() which will give you the target triple. I'd like to better understand the workflow that wants to know the host triple from lldb.

[pvieito]

Hi! You can read a little bit of the underling motivations in the Swift Forums: https://forums.swift.org/t/jupyter-kernel-launch-the-debugger-with-the-current-triple-in-repl-mode/16795

The main problem is that currently there is no way to get the host and/or target current triple and architecture through the SB API. This would be useful for creating a REPL, for example.

[jasonmolenda]

Thanks for the link. You can get the current target triple if you have an SBTarget – SBTarget::GetTriple(). You're correct that lldb doesn't have any API to get the host triple right now.