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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-09-01 11:00:23 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-31 04:14:01 -0600 |
| commit | c60955f44624946f937844c812e1e52a26742249 (patch) | |
| tree | fb88f21850e984e56c5a5aaa4b7ff2f78d76122a /tools | |
| parent | 8d31e5f9949ddbf6b700a71c4a7b68d612df1b9c (diff) | |
| download | linux-stable-c60955f44624946f937844c812e1e52a26742249.tar.gz linux-stable-c60955f44624946f937844c812e1e52a26742249.tar.bz2 linux-stable-c60955f44624946f937844c812e1e52a26742249.zip | |
perf symbols: Fixup symbol sizes before picking best ones
commit 432746f8e0b6a82ba832b771afe31abd51af6752 upstream.
When we call symbol__fixup_duplicate() we use algorithms to pick the
"best" symbols for cases where there are various functions/aliases to an
address, and those check zero size symbols, which, before calling
symbol__fixup_end() are _all_ symbols in a just parsed kallsyms file.
So first fixup the end, then fixup the duplicates.
Found while trying to figure out why 'perf test vmlinux' failed, see the
output of 'perf test -v vmlinux' to see cases where the symbols picked
as best for vmlinux don't match the ones picked for kallsyms.
Cc: Anton Blanchard <anton@samba.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes: 694bf407b061 ("perf symbols: Add some heuristics for choosing the best duplicate symbol")
Link: http://lkml.kernel.org/n/tip-rxqvdgr0mqjdxee0kf8i2ufn@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/symbol-elf.c | 2 | ||||
| -rw-r--r-- | tools/perf/util/symbol.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index 8188308a7783..27ae382feb2d 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -1091,8 +1091,8 @@ new_symbol: * For misannotated, zeroed, ASM function sizes. */ if (nr > 0) { - symbols__fixup_duplicate(&dso->symbols[map->type]); symbols__fixup_end(&dso->symbols[map->type]); + symbols__fixup_duplicate(&dso->symbols[map->type]); if (kmap) { /* * We need to fixup this here too because we create new diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index f7739b88e29d..520a32a12f8a 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -1278,8 +1278,8 @@ int dso__load_kallsyms(struct dso *dso, const char *filename, if (kallsyms__delta(map, filename, &delta)) return -1; - symbols__fixup_duplicate(&dso->symbols[map->type]); symbols__fixup_end(&dso->symbols[map->type]); + symbols__fixup_duplicate(&dso->symbols[map->type]); if (dso->kernel == DSO_TYPE_GUEST_KERNEL) dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; |