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perf tools: Add size to 'struct perf_record_header_build_id'

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We do not store size with build ids in perf data, but there's enough
space to do it. Adding misc bit PERF_RECORD_MISC_BUILD_ID_SIZE to mark
build id event with size.

With this fix the dso with md5 build id will have correct build id data
and will be usable for debuginfod processing if needed (coming in
following patches).

Committer notes:

Use %zu with size_t to fix this error on 32-bit arches:

  util/header.c: In function '__event_process_build_id':
  util/header.c:2105:3: error: format '%lu' expects argument of type 'long unsigned int', but argument 6 has type 'size_t' [-Werror=format=]
     pr_debug("build id event received for %s: %s [%lu]\n",
     ^

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20201013192441.1299447-8-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa
2020-10-13 21:24:39 +02:00
committed by Arnaldo Carvalho de Melo
parent 39be8d0115
commit b0a323c7f0
3 changed files with 23 additions and 7 deletions
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12
tools/lib/perf/include/perf/event.h
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@@ -201,10 +201,20 @@ struct perf_record_header_tracing_data {
__u32 size;
};
#define PERF_RECORD_MISC_BUILD_ID_SIZE (1 << 15)
struct perf_record_header_build_id {
struct perf_event_header header;
pid_t pid;
__u8 build_id[24];
union {
__u8 build_id[24];
struct {
__u8 data[20];
__u8 size;
__u8 reserved1__;
__u16 reserved2__;
};
};
char filename[];
};