perf symbols: Don't demangle parameters and such by default

Some C++ symbols have very long name and they make column length longer.
Most of them are about parameters including templates and we can ignore
such info most of time IMHO.

This patch passes DMGL_NO_OPTS by default when calling bfd_demangle().
One can still see full symbols with -v/--verbose option.

before:
  JS_CallFunctionValue(JSContext*, JSObject*, JS::Value, unsigned int, JS::Value*, JS::Value*)

after:
  JS_CallFunctionValue

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1406785662-5534-9-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index d75349979e65..ec5ec1c9d9b5 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -939,8 +939,11 @@ new_symbol:
                  * to it...
                  */
                 if (symbol_conf.demangle) {
-                        demangled = bfd_demangle(NULL, elf_name,
-                                                 DMGL_PARAMS | DMGL_ANSI);
+                        int demangle_flags = DMGL_NO_OPTS;
+                        if (verbose)
+                                demangle_flags = DMGL_PARAMS | DMGL_ANSI;
+
+                        demangled = bfd_demangle(NULL, elf_name, demangle_flags);
                         if (demangled != NULL)
                                 elf_name = demangled;
                 }