mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2025-01-31 12:41:49 +01:00
6efa716e20
Lorenz Bauer from Cloudflare tried to use "const struct <name>" as the type for __builtin_btf_type_id(*(const struct <name>)0, 1) relocation and hit a llvm BPF fatal error. https://lore.kernel.org/bpf/a3782f71-3f6b-1e75-17a9-1827822c2030@fb.com/ ... fatal error: error in backend: Empty type name for BTF_TYPE_ID_REMOTE reloc Currently, we require the debuginfo type itself must have a name. In this case, the debuginfo type is "const" which points to "struct <name>". The "const" type does not have a name, hence the above fatal error will be triggered. Let us permit "const" and "volatile" type modifiers. We skip modifiers in some other cases as well like structure member type tracing. This can aviod the above fatal error. Differential Revision: https://reviews.llvm.org/D97986