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Commit 922d0e4d authored by Vladimir Nikulichev's avatar Vladimir Nikulichev Committed by Jiri Olsa
Browse files

perf tools: Adjust symbols in VDSO 



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: default avatarVladimir Nikulichev <nvs@tbricks.com>
Tested-by: default avatarNamhyung Kim <namhyung@kernel.org>
Reviewed-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Link: http://lkml.kernel.org/r/969812.163009436-sendEmail@nvs


Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
parent acb61fc8

tools/perf/util/symbol-elf.c

+2 −0
Original line number Diff line number Diff line
@@ -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);