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| author | Adrian Hunter <adrian.hunter@intel.com> | 2022-05-20 16:24:00 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-05-23 10:11:01 -0300 |
| commit | 237c96b8c1584d4c28d3593e5f52508fbec9ff06 (patch) | |
| tree | 5c5a638c9f1cd7d565e8be5828d192ce393a5071 /tools/perf/util/header.h | |
| parent | 1634b5a1f11cf407255d42fcc1d6bf257d16adab (diff) | |
| download | lwn-237c96b8c1584d4c28d3593e5f52508fbec9ff06.tar.gz lwn-237c96b8c1584d4c28d3593e5f52508fbec9ff06.zip | |
perf header: Add ability to keep feature sections
Many feature sections should not be re-written during perf inject. In
preparation to support that, add callbacks that a tool can use to copy
a feature section from elsewhere. perf inject will use this facility to
copy features sections from the input file.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20220520132404.25853-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/header.h')
| -rw-r--r-- | tools/perf/util/header.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h index 0eb4bc29a5a4..e76ab02d5541 100644 --- a/tools/perf/util/header.h +++ b/tools/perf/util/header.h @@ -121,6 +121,16 @@ int perf_session__write_header(struct perf_session *session, int fd, bool at_exit); int perf_header__write_pipe(int fd); +/* feat_writer writes a feature section to output */ +struct feat_writer { + int (*write)(struct feat_writer *fw, void *buf, size_t sz); +}; + +/* feat_copier copies a feature section using feat_writer to output */ +struct feat_copier { + int (*copy)(struct feat_copier *fc, int feat, struct feat_writer *fw); +}; + void perf_header__set_feat(struct perf_header *header, int feat); void perf_header__clear_feat(struct perf_header *header, int feat); bool perf_header__has_feat(const struct perf_header *header, int feat); |