https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112656
Bug ID: 112656
Summary: btf: function prototypes generated with name
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: jemarch at gcc dot gnu.org
Target Milestone: ---
BTF suports both BTF_KIND_FUNC and BTF_KIND_FUNC_PROTO tags. FUNC entries link
to their corresponding PROTO via type_id. PROTO entries must have no names,
i.e. name_off shall be 0.
GCC seems to be generating non-anonymous BTF_KIND_FUNC_PROTO entries in some
circumstances:
$ bpf-unknown-none-gcc -c -O2 repro.i -o repro.o
$ bpftool btf dump all | grep FUNC_PROTO | grep -v anon
[8319] FUNC_PROTO '____kretprobe_ieee80211_get_channel_khz' ret_type_id=7
vlen=2
[8321] FUNC_PROTO '____kprobe_ieee80211_scan_completed' ret_type_id=7 vlen=2
[8333] FUNC_PROTO '____kprobe_ieee80211_request_scan' ret_type_id=7 vlen=2
[8343] FUNC_PROTO '____kprobe_unregister_netdev' ret_type_id=7 vlen=2
[8345] FUNC_PROTO '____kprobe_register_netdev' ret_type_id=7 vlen=2
[8347] FUNC_PROTO '____kprobe_ieee80211_unregister_hw' ret_type_id=7 vlen=1
[8349] FUNC_PROTO '____kprobe_ieee80211_register_hw' ret_type_id=7 vlen=1
[8351] FUNC_PROTO 'log_event' ret_type_id=0 vlen=2
