[lldb-dev] LLDB sets process arch to *-apple-macosx in doubt

Félix Cloutier felixcca at yahoo.ca
Fri Aug 30 21:00:59 PDT 2013

Hello again,

LLDB says I need a disassembler plugin to get disassembly. Since PowerPC is a supported LLVM target, I figured DisassemblerLLVMC would do it for me. However, it turns out that LLDB thinks I'm a powerpc-apple-macosx target, even though I'm not pretending that (I'm saying I'm a powerpc-unknown-unknown); and LLVM won't produce a Target for that triple.

This seems to happen because GDBRemoteCommunicationClient::GetCurrentProcessInfo() will eventually do `m_process_arch.SetArchitecture(eArchTypeMachO, cpu, sub)`, and ArchSpec will set the OS to Mac OS X and the vendor to Apple if it sees that the arch type is Mach-O. Interestingly, m_host_arch stays untouched.

I suppose the triple is kind of a big deal to get the right plugins, but I already have an ABI plugin and I wouldn't really mind throwing in the disassembler I already have, and I'm not sure which other plugins I'll find myself missing.

What's the suggested course of action? Fix the process triple and hope LLVM likes powerpc-unknown-unknown better? Bring in my disassembler? Fix the process triple and bring in my disassembler anyways?


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