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* [PATCH] perf tools: Adjust symbols in VDSO
@ 2014-04-11 13:19 Vladimir Nikulichev
  0 siblings, 0 replies; 3+ messages in thread
From: Vladimir Nikulichev @ 2014-04-11 13:19 UTC (permalink / raw)
  To: Jiri Olsa
  Cc: Namhyung Kim, Peter Zijlstra, Paul Mackerras, Ingo Molnar,
	Arnaldo Carvalho de Melo, linux-perf-users, linux-kernel

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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: Vladimir Nikulichev <nvs@tbricks.com>

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);


^ permalink raw reply related	[flat|nested] 3+ messages in thread
* Re: [PATCH] perf tools: Adjust symbols in VDSO
  2014-04-11 14:25 Vladimir Nikulichev
@ 2014-04-17  8:46 ` Adrian Hunter
  0 siblings, 0 replies; 3+ messages in thread
From: Adrian Hunter @ 2014-04-17  8:46 UTC (permalink / raw)
  To: Vladimir Nikulichev, Jiri Olsa
  Cc: Namhyung Kim, Peter Zijlstra, Paul Mackerras, Ingo Molnar,
	Arnaldo Carvalho de Melo, linux-perf-users, linux-kernel

On 04/11/2014 05:25 PM, Vladimir Nikulichev wrote:
> 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: Vladimir Nikulichev <nvs@tbricks.com>

Annotation still doesn't work. but this is a start, so:

Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>


> 
> 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);

^ permalink raw reply	[flat|nested] 3+ messages in thread
* [PATCH] perf tools: Adjust symbols in VDSO
@ 2014-04-11 14:25 Vladimir Nikulichev
  2014-04-17  8:46 ` Adrian Hunter
  0 siblings, 1 reply; 3+ messages in thread
From: Vladimir Nikulichev @ 2014-04-11 14:25 UTC (permalink / raw)
  To: Jiri Olsa
  Cc: Namhyung Kim, Peter Zijlstra, Paul Mackerras, Ingo Molnar,
	Arnaldo Carvalho de Melo, linux-perf-users, linux-kernel

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: Vladimir Nikulichev <nvs@tbricks.com>

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);

^ permalink raw reply related	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2014-04-17  8:47 UTC | newest]

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2014-04-11 13:19 [PATCH] perf tools: Adjust symbols in VDSO Vladimir Nikulichev
2014-04-11 14:25 Vladimir Nikulichev
2014-04-17  8:46 ` Adrian Hunter

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