[PATCH 01/10] perf script: Add --[no-]-demangle/--[no-]-demangle-kernel

[Arnaldo Carvalho de Melo <acme@kernel.org>]

From: Mark Drayton <mbd@fb.com>

Sometimes when post-processing output from `perf script` one does not
want to demangle C++ symbol names. Add an option to allow this.

Also add --[no-]demangle-kernel to be consistent with top/report/probe.

Signed-off-by: Mark Drayton <mbd@fb.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/1440616695-32340-1-git-send-email-scientist@fb.com
Signed-off-by: Yannick Brosseau <scientist@fb.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Documentation/perf-script.txt | 7 +++++++
 tools/perf/builtin-script.c              | 5 +++++
 2 files changed, 12 insertions(+)

diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index c0d24791a7f3..614b2c7b0293 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -226,6 +226,13 @@ OPTIONS
 	Display context switch events i.e. events of type PERF_RECORD_SWITCH or
 	PERF_RECORD_SWITCH_CPU_WIDE.
 
+--demangle::
+	Demangle symbol names to human readable form. It's enabled by default,
+	disable with --no-demangle.
+
+--demangle-kernel::
+	Demangle kernel symbol names to human readable form (for C++ kernels).
+
 --header
 	Show perf.data header.
 
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 105332e950a9..4430340292c0 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -1671,6 +1671,11 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
 			    itrace_parse_synth_opts),
 	OPT_BOOLEAN(0, "full-source-path", &srcline_full_filename,
 			"Show full source file name path for source lines"),
+	OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
+			"Enable symbol demangling"),
+	OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
+			"Enable kernel symbol demangling"),
+
 	OPT_END()
 	};
 	const char * const script_subcommands[] = { "record", "report", NULL };
-- 
2.1.0