[GIT PULL 0/2] perf/urgent fixes

[GIT PULL 0/2] perf/urgent fixes

[Arnaldo Carvalho de Melo]

From: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>

Hi Ingo,

	Please consider pulling,

Regards,

- Arnaldo

The following changes since commit bb236de5d9509c1c6ea5ce0680f000002e731ee2:

  Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent (2014-01-23 17:43:35 +0100)

are available in the git repository at:


  git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux tags/perf-urgent-for-mingo

for you to fetch changes up to 4afc81cd1caa93daa50c1c29a3ab747c978abc13:

  perf symbols: Load map before using map->map_ip() (2014-01-23 15:48:12 -0300)

----------------------------------------------------------------
perf/urgent fixes:

. Fix traceevent plugin path definitions (Josh Boyer)

. Load map before using map->map_ip() (Masami Hiramatsu)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

----------------------------------------------------------------
Josh Boyer (1):
      perf tools: Fix traceevent plugin path definitions

Masami Hiramatsu (1):
      perf symbols: Load map before using map->map_ip()

 tools/lib/traceevent/Makefile | 2 +-
 tools/perf/config/Makefile    | 2 +-
 tools/perf/util/map.c         | 3 ++-
 3 files changed, 4 insertions(+), 3 deletions(-)

[PATCH 1/2] perf tools: Fix traceevent plugin path definitions

[Arnaldo Carvalho de Melo]

From: Josh Boyer <jwboyer@fedoraproject.org>

The plugindir_SQ definition contains $(prefix) which is not needed as
the $(libdir) definition already contains prefix in it.  This leads to
the path including an extra prefix in it, e.g. /usr/usr/lib64.

The -DPLUGIN_DIR defintion includes DESTDIR.  This is incorrect, as it
sets the plugin search path to include the value of DESTDIR.  DESTDIR is
a mechanism to install in a non-standard location such as a chroot or an
RPM build root.  In the RPM case, this leads to the search path being
incorrect after the resulting RPM is installed (or in some cases an RPM
build failure).

Remove both of these unnecessary inclusions.

Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20140122150147.GK16455@hansolo.jdub.homelinux.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/lib/traceevent/Makefile | 2 +-
 tools/perf/config/Makefile    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/lib/traceevent/Makefile b/tools/lib/traceevent/Makefile
index 56d52a33a3df..005c9cc06935 100644
--- a/tools/lib/traceevent/Makefile
+++ b/tools/lib/traceevent/Makefile
@@ -63,7 +63,7 @@ endif
 endif
 
 ifeq ($(set_plugin_dir),1)
-PLUGIN_DIR = -DPLUGIN_DIR="$(DESTDIR)/$(plugin_dir)"
+PLUGIN_DIR = -DPLUGIN_DIR="$(plugin_dir)"
 PLUGIN_DIR_SQ = '$(subst ','\'',$(PLUGIN_DIR))'
 endif
 
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index d604e50fc167..c48d44958172 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -600,5 +600,5 @@ perfexec_instdir_SQ = $(subst ','\'',$(perfexec_instdir))
 # Otherwise we install plugins into the global $(libdir).
 ifdef DESTDIR
 plugindir=$(libdir)/traceevent/plugins
-plugindir_SQ= $(subst ','\'',$(prefix)/$(plugindir))
+plugindir_SQ= $(subst ','\'',$(plugindir))
 endif
-- 
1.8.1.4

[PATCH 2/2] perf symbols: Load map before using map->map_ip()

[Arnaldo Carvalho de Melo]

From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>

In map_groups__find_symbol() map->map_ip is used without ensuring the
map is loaded. Then the address passed to map->map_ip isn't mapped at
the first time.

E.g. below code always fails to get a symbol at the first call;

	addr = /* Somewhere in the kernel text */
	symbol_conf.try_vmlinux_path = true;
	symbol__init();
	host_machine = machine__new_host();
	sym = machine__find_kernel_function(host_machine,
					 addr, NULL, NULL);
	/* Note that machine__find_kernel_function calls
	   map_groups__find_symbol */

This ensures it by calling map__load before using it in
map_groups__find_symbol().

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: "David A. Long" <dave.long@linaro.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>
Cc: yrl.pp-manager.tt@hitachi.com
Link: http://lkml.kernel.org/r/20140123022950.7206.17357.stgit@kbuild-fedora.yrl.intra.hitachi.co.jp
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/map.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index ee1dd687a262..3b97513f0e77 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -386,7 +386,8 @@ struct symbol *map_groups__find_symbol(struct map_groups *mg,
 {
 	struct map *map = map_groups__find(mg, type, addr);
 
-	if (map != NULL) {
+	/* Ensure map is loaded before using map->map_ip */
+	if (map != NULL && map__load(map, filter) >= 0) {
 		if (mapp != NULL)
 			*mapp = map;
 		return map__find_symbol(map, map->map_ip(map, addr), filter);
-- 
1.8.1.4

Re: [GIT PULL 0/2] perf/urgent fixes

[Ingo Molnar]

* Arnaldo Carvalho de Melo <acme@infradead.org> wrote:

> From: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
> 
> Hi Ingo,
> 
> 	Please consider pulling,
> 
> Regards,
> 
> - Arnaldo
> 
> The following changes since commit bb236de5d9509c1c6ea5ce0680f000002e731ee2:
> 
>   Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent (2014-01-23 17:43:35 +0100)
> 
> are available in the git repository at:
> 
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux tags/perf-urgent-for-mingo
> 
> for you to fetch changes up to 4afc81cd1caa93daa50c1c29a3ab747c978abc13:
> 
>   perf symbols: Load map before using map->map_ip() (2014-01-23 15:48:12 -0300)
> 
> ----------------------------------------------------------------
> perf/urgent fixes:
> 
> . Fix traceevent plugin path definitions (Josh Boyer)
> 
> . Load map before using map->map_ip() (Masami Hiramatsu)
> 
> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
> 
> ----------------------------------------------------------------
> Josh Boyer (1):
>       perf tools: Fix traceevent plugin path definitions
> 
> Masami Hiramatsu (1):
>       perf symbols: Load map before using map->map_ip()
> 
>  tools/lib/traceevent/Makefile | 2 +-
>  tools/perf/config/Makefile    | 2 +-
>  tools/perf/util/map.c         | 3 ++-
>  3 files changed, 4 insertions(+), 3 deletions(-)

Pulled, thanks Arnaldo!

	Ingo