perf data: Add description of header HEADER_BPF_PROG_INFO and HEADER_BPF_BTF
This patch addes description of HEADER_BPF_PROG_INFO and HEADER_BPF_BTF to
perf.data-file-format.txt.
Requested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Fixes: 606f972b13
("perf bpf: Save bpf_prog_info information as headers to perf.data")
Link: http://lkml.kernel.org/r/20190521064406.2498925-1-songliubraving@fb.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -272,6 +272,22 @@ struct {
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Two uint64_t for the time of first sample and the time of last sample.
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HEADER_BPF_PROG_INFO = 25,
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struct bpf_prog_info_linear, which contains detailed information about
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a BPF program, including type, id, tag, jited/xlated instructions, etc.
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HEADER_BPF_BTF = 26,
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Contains BPF Type Format (BTF). For more information about BTF, please
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refer to Documentation/bpf/btf.rst.
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struct {
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u32 id;
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u32 data_size;
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char data[];
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};
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HEADER_COMPRESSED = 27,
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struct {
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