Alexander Lobakin 658ac06801 bpftool: Use a local bpf_perf_event_value to fix accessing its fields ... Fix the following error when building bpftool: CLANG profiler.bpf.o CLANG pid_iter.bpf.o skeleton/profiler.bpf.c:18:21: error: invalid application of 'sizeof' to an incomplete type 'struct bpf_perf_event_value' __uint(value_size, sizeof(struct bpf_perf_event_value)); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ tools/bpf/bpftool/bootstrap/libbpf/include/bpf/bpf_helpers.h:13:39: note: expanded from macro '__uint' tools/bpf/bpftool/bootstrap/libbpf/include/bpf/bpf_helper_defs.h:7:8: note: forward declaration of 'struct bpf_perf_event_value' struct bpf_perf_event_value; ^ struct bpf_perf_event_value is being used in the kernel only when CONFIG_BPF_EVENTS is enabled, so it misses a BTF entry then. Define struct bpf_perf_event_value___local with the `preserve_access_index` attribute inside the pid_iter BPF prog to allow compiling on any configs. It is a full mirror of a UAPI structure, so is compatible both with and w/o CO-RE. bpf_perf_event_read_value() requires a pointer of the original type, so a cast is needed. Fixes: 47c09d6a9f ("bpftool: Introduce "prog profile" command") Suggested-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexander Lobakin <alobakin@pm.me> Signed-off-by: Quentin Monnet <quentin@isovalent.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20230707095425.168126-5-quentin@isovalent.com		2023-07-10 15:29:21 -07:00
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pid_iter.bpf.c	bpftool: Use a local copy of BPF_LINK_TYPE_PERF_EVENT in pid_iter.bpf.c	2023-07-10 15:29:20 -07:00
pid_iter.h	bpftool: Add bpf_cookie to link output	2022-03-15 15:07:27 -07:00
profiler.bpf.c	bpftool: Use a local bpf_perf_event_value to fix accessing its fields	2023-07-10 15:29:21 -07:00