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

[Greg Clayton]

On Sep 3, 2013, at 7:02 PM, Félix Cloutier <felixcca at yahoo.ca> wrote:

> Heh, just as I was done porting my disassembler over. :)
> 
> Do I need to do anything about the target triple, or will it be happy simply to see the PowerPC part?

I believe it will be happy with any vendor and os.

> 
> Félix
> 
> Le 2013-09-03 à 12:42:18, Greg Clayton <gclayton at apple.com> a écrit :
> 
>> I don't believe we enable the PowerPC targets in LLDB. You will need to add it in the following file:
>> 
>> http://llvm.org/svn/llvm-project/lldb/trunk/scripts/build-llvm.pl
>> 
>> I think the only line you will need to change is:
>> 
>>           my $lldb_configuration_options = "--enable-targets=x86_64,arm $common_configure_options $llvm_config_href->{configure_options}";
>> 
>> Note only "x86_64" and "arm" targets are enabled.
>> 
>> This should be enough to compile in PowerPC support.
>> 
>> Greg
>> 
>> 
>> On Aug 30, 2013, at 9:00 PM, Félix Cloutier <felixcca at yahoo.ca> wrote:
>> 
>>> 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?
>>> 
>>> Félix
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>> 
>