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libbpf: Add btf__new_empty() to create an empty BTF object

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Add an ability to create an empty BTF object from scratch. This is going to be
used by pahole for BTF encoding. And also by selftest for convenient creation
of BTF objects.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20200926011357.2366158-7-andriin@fb.com
This commit is contained in:
Andrii Nakryiko
2020-09-25 18:13:54 -07:00
committed by Alexei Starovoitov
parent 919d2b1dbb
commit a871b04310
3 changed files with 32 additions and 0 deletions
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tools/lib/bpf/libbpf.map
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@@ -307,6 +307,7 @@ LIBBPF_0.2.0 {
bpf_program__section_name;
btf__add_str;
btf__find_str;
btf__new_empty;
perf_buffer__buffer_cnt;
perf_buffer__buffer_fd;
perf_buffer__epoll_fd;