[lldb-dev] Debugging x86 binaries on x86_64?

[Arne Schmitz]

Hi everyone,

I just built lldb 3.5.0 from source on a x86_64 Debian Stable machine 
(because there are no packages for Debian Stable). When I try to debug a 
32bit (x86) application with the resulting binary, I get the following 
error:

$ lldb -p $(pgrep foo)
lldb: 
llvm-3.5.0.src/tools/lldb/source/Plugins/Process/Utility/RegisterContextLinux_x86_64.cpp:137: 
uint32_t GetRegisterInfoCount(const lldb_private::ArchSpec&): Assertion 
`!GetPrivateRegisterInfoVector ().empty () && "i386 register info not 
yet filled."' failed.
Aborted

Debugging x86_64 works just fine. Why is that? Is this a known bug? How 
can I fix this?

Best regards,

Arne