diff options
| author | Jiri Olsa <jolsa@kernel.org> | 2020-10-13 21:24:38 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-10-14 09:25:36 -0300 |
| commit | 39be8d0115b321ed2b28e43dca12c13ae7595f73 (patch) | |
| tree | dc123dbec7fd9d53025854eb9e974b04efbdd11e /tools/perf | |
| parent | 8dfdf440d398f0bf63f1d4de881cbe9c69df53bb (diff) | |
| download | lwn-39be8d0115b321ed2b28e43dca12c13ae7595f73.tar.gz lwn-39be8d0115b321ed2b28e43dca12c13ae7595f73.zip | |
perf tools: Pass build_id object to dso__build_id_equal()
Passing build_id object to dso__build_id_equal(), so we can properly
check build id with different size than sha1.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20201013192441.1299447-7-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/dso.c | 5 | ||||
| -rw-r--r-- | tools/perf/util/dso.h | 2 | ||||
| -rw-r--r-- | tools/perf/util/symbol-elf.c | 8 | ||||
| -rw-r--r-- | tools/perf/util/symbol.c | 2 |
4 files changed, 11 insertions, 6 deletions
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c index 4415ce83150b..ca965845b35e 100644 --- a/tools/perf/util/dso.c +++ b/tools/perf/util/dso.c @@ -1332,9 +1332,10 @@ void dso__set_build_id(struct dso *dso, struct build_id *bid) dso->has_build_id = 1; } -bool dso__build_id_equal(const struct dso *dso, u8 *build_id) +bool dso__build_id_equal(const struct dso *dso, struct build_id *bid) { - return memcmp(dso->bid.data, build_id, sizeof(dso->bid.data)) == 0; + return dso->bid.size == bid->size && + memcmp(dso->bid.data, bid->data, dso->bid.size) == 0; } void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h index 5a5678dbdaa5..f926c96bf230 100644 --- a/tools/perf/util/dso.h +++ b/tools/perf/util/dso.h @@ -261,7 +261,7 @@ void dso__set_sorted_by_name(struct dso *dso); void dso__sort_by_name(struct dso *dso); void dso__set_build_id(struct dso *dso, struct build_id *bid); -bool dso__build_id_equal(const struct dso *dso, u8 *build_id); +bool dso__build_id_equal(const struct dso *dso, struct build_id *bid); void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine); int dso__kernel_module_get_build_id(struct dso *dso, const char *root_dir); diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index 97a55f162ea5..44dd86a4f25f 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -834,13 +834,17 @@ int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, /* Always reject images with a mismatched build-id: */ if (dso->has_build_id && !symbol_conf.ignore_vmlinux_buildid) { u8 build_id[BUILD_ID_SIZE]; + struct build_id bid; + int size; - if (elf_read_build_id(elf, build_id, BUILD_ID_SIZE) < 0) { + size = elf_read_build_id(elf, build_id, BUILD_ID_SIZE); + if (size <= 0) { dso->load_errno = DSO_LOAD_ERRNO__CANNOT_READ_BUILDID; goto out_elf_end; } - if (!dso__build_id_equal(dso, build_id)) { + build_id__init(&bid, build_id, size); + if (!dso__build_id_equal(dso, &bid)) { pr_debug("%s: build id mismatch for %s.\n", __func__, name); dso->load_errno = DSO_LOAD_ERRNO__MISMATCHING_BUILDID; goto out_elf_end; diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 976632d0baa0..6138866665df 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -2136,7 +2136,7 @@ static char *dso__find_kallsyms(struct dso *dso, struct map *map) } if (sysfs__read_build_id("/sys/kernel/notes", &bid) == 0) - is_host = dso__build_id_equal(dso, bid.data); + is_host = dso__build_id_equal(dso, &bid); /* Try a fast path for /proc/kallsyms if possible */ if (is_host) { |