Messages in this thread Patch in this message | | | From | Jiri Olsa <> | Subject | [PATCH 2/3] perf tools: Adjust symbols in VDSO | Date | Fri, 18 Apr 2014 12:20:42 +0200 |
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From: Vladimir Nikulichev <nvs@tbricks.com>
pert-report doesn't resolve function names in VDSO:
$ perf report --stdio -g flat,0.0,15,callee --sort pid ... 8.76% 0x7fff6b1fe861 __gettimeofday ACE_OS::gettimeofday() ...
In this case symbol values should be adjusted the same way as for executables, relocatable objects and prelinked libraries.
After fix:
$ perf report --stdio -g flat,0.0,15,callee --sort pid ... 8.76% __vdso_gettimeofday __gettimeofday ACE_OS::gettimeofday()
Signed-off-by: Vladimir Nikulichev <nvs@tbricks.com> Tested-by: Namhyung Kim <namhyung@kernel.org> Reviewed-by: Adrian Hunter <adrian.hunter@intel.com> Link: http://lkml.kernel.org/r/969812.163009436-sendEmail@nvs Signed-off-by: Jiri Olsa <jolsa@redhat.com> --- tools/perf/util/symbol-elf.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index 3b7dbf5..6864661 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -6,6 +6,7 @@ #include <inttypes.h> #include "symbol.h" +#include "vdso.h" #include <symbol/kallsyms.h> #include "debug.h" @@ -618,6 +619,7 @@ int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, GElf_Shdr shdr; ss->adjust_symbols = (ehdr.e_type == ET_EXEC || ehdr.e_type == ET_REL || + is_vdso_map(dso->short_name) || elf_section_by_name(elf, &ehdr, &shdr, ".gnu.prelink_undo", NULL) != NULL); -- 1.8.3.1
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