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| author |   James Clark <james.clark@arm.com> | 2022-03-04 09:09:56 +0000 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-03-12 11:01:12 -0300 |
| commit | f693dac4794fae99c04f75a3a1a5c4018bb33144 (patch) | |
| tree | 77fbe905678e26ca6a2aa761b9fd4a17b2995aa2 /tools/perf/util/map.c | |
| parent | tools compiler.h: Remove duplicate #ifndef noinline block (diff) | |
| download | linux-dev-f693dac4794fae99c04f75a3a1a5c4018bb33144.tar.xz linux-dev-f693dac4794fae99c04f75a3a1a5c4018bb33144.zip | |
perf tools: Set build-id using build-id header on new mmap records
MMAP records that occur after the build-id header is parsed do not have
their build-id set even if the filename matches an entry from the
header. Set the build-id on these dsos as long as the MMAP record
doesn't have its own build-id set.
This fixes an issue with off target analysis where the local version of
a dso is loaded rather than one from ~/.debug via a build-id.
Reported-by: Denis Nikitin <denik@chromium.org>
Signed-off-by: James Clark <james.clark@arm.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: coresight@lists.linaro.org
Link: https://lore.kernel.org/r/20220304090956.2048712-2-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/map.c')
| -rw-r--r-- | tools/perf/util/map.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c index 1803d3887afe..e0aa4a254583 100644 --- a/tools/perf/util/map.c +++ b/tools/perf/util/map.c @@ -127,7 +127,7 @@ struct map *map__new(struct machine *machine, u64 start, u64 len, if (map != NULL) { char newfilename[PATH_MAX]; - struct dso *dso; + struct dso *dso, *header_bid_dso; int anon, no_dso, vdso, android; android = is_android_lib(filename); @@ -183,9 +183,23 @@ struct map *map__new(struct machine *machine, u64 start, u64 len, } dso->nsinfo = nsi; - if (build_id__is_defined(bid)) + if (build_id__is_defined(bid)) { dso__set_build_id(dso, bid); - + } else { + /* + * If the mmap event had no build ID, search for an existing dso from the + * build ID header by name. Otherwise only the dso loaded at the time of + * reading the header will have the build ID set and all future mmaps will + * have it missing. + */ + down_read(&machine->dsos.lock); + header_bid_dso = __dsos__find(&machine->dsos, filename, false); + up_read(&machine->dsos.lock); + if (header_bid_dso && header_bid_dso->header_build_id) { + dso__set_build_id(dso, &header_bid_dso->bid); + dso->header_build_id = 1; + } + } dso__put(dso); } return map; |