Hi Yonghong, Andrii,
Some more poking at CO-RE. The code below leads to a compiler error:
struct s {
int _1;
char _2;
};
__section("socket_filter/type_ids") int type_ids() {
return bpf_core_type_id_kernel(const struct s);
}
Truncated output:
fatal error: error in backend: Empty type name for BTF_TYPE_ID_REMOTE reloc
PLEASE submit a bug report to https://bugs.llvm.org/ and include the
crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: clang-12 -target bpf -O2 -g -Wall -Werror
-mlittle-endian -c internal/btf/testdata/relocs.c -o
internal/btf/testdata/relocs-el.elf
1. <eof> parser at end of file
2. Per-function optimization
3. Running pass 'BPF Preserve Debuginfo Type' on function '@type_ids'
...
clang: error: clang frontend command failed with exit code 70 (use -v
to see invocation)
Ubuntu clang version
12.0.0-++20210126113614+510b3d4b3e02-1~exp1~20210126104320.178
Target: bpf
"volatile" has the same problem. Interestingly, the same code works
for bpf_core_type_id_local. Is this expected?
Best
Lorenz
--
Lorenz Bauer | Systems Engineer
6th Floor, County Hall/The Riverside Building, SE1 7PB, UK
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