Hi folks, This is my first time to ask questions in this mailing list. I'm the author of https://github.com/tw4452852/zbpf which is a framework to write BPF programs with Zig toolchain. During the development, as the BTF is totally generated by the Zig toolchain, some naming conventions will make the BTF verifier refuse to load. Right now I have to patch the libbpf to do some fixup before loading into the kernel (https://github.com/tw4452852/libbpf_zig/blob/main/0001-temporary-WA-for-invalid-BTF-info-generated-by-Zig.patch). Even though this just work-around the issue, I'm still curious about the current naming sanitation, I want to know some background about it. If possible, could we relax this to accept more languages (like Zig) to write BPF programs? Thanks in advance. For reference, here the BTF generated by Zig for this program (https://github.com/tw4452852/zbpf/blob/main/samples/perf_event.zig) [1] PTR '*[4]u8' type_id=3 [2] INT 'u8' size=1 bits_offset=0 nr_bits=8 encoding=(none) [3] ARRAY '(anon)' type_id=2 index_type_id=4 nr_elems=4 [4] INT '__ARRAY_SIZE_TYPE__' size=4 bits_offset=0 nr_bits=32 encoding=(none) [5] PTR '*u32' type_id=6 [6] INT 'u32' size=4 bits_offset=0 nr_bits=32 encoding=(none) [7] STRUCT 'map.Map.Def' size=24 vlen=3 'type' type_id=1 bits_offset=0 'key' type_id=5 bits_offset=64 'value' type_id=5 bits_offset=128 [8] VAR 'events' type_id=7, linkage=global [9] PTR '*[2]u8' type_id=10 [10] ARRAY '(anon)' type_id=2 index_type_id=4 nr_elems=2 [11] PTR '*[1]u8' type_id=12 [12] ARRAY '(anon)' type_id=2 index_type_id=4 nr_elems=1 [13] STRUCT 'map.Map.Def' size=32 vlen=4 'type' type_id=9 bits_offset=0 'key' type_id=5 bits_offset=64 'value' type_id=5 bits_offset=128 'max_entries' type_id=11 bits_offset=192 [14] VAR 'my_pid' type_id=13, linkage=global [15] FUNC_PROTO '(anon)' ret_type_id=16 vlen=1 '(anon)' type_id=17 [16] INT 'c_int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED [17] PTR '*perf_event.test_perf_event_array__opaque_478' type_id=18 [18] STRUCT 'perf_event.test_perf_event_array__opaque_478' size=0 vlen=0 [19] FUNC 'test_perf_event_array' type_id=15 linkage=global [20] FUNC_PROTO '(anon)' ret_type_id=21 vlen=1 '(anon)' type_id=21 [21] INT 'usize' size=8 bits_offset=0 nr_bits=64 encoding=(none) [22] FUNC 'getauxvalImpl' type_id=20 linkage=global [23] ARRAY '(anon)' type_id=2 index_type_id=4 nr_elems=3 [24] VAR '_license' type_id=23, linkage=global [25] DATASEC '.maps' size=0 vlen=2 type_id=8 offset=0 size=24 (VAR 'events') type_id=14 offset=0 size=32 (VAR 'my_pid') [26] DATASEC 'license' size=0 vlen=1 type_id=24 offset=0 size=4 (VAR '_license') Regards.
