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

[Mark Drayton <mbd@fb.com>]

Summary: 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>
---
 tools/perf/Documentation/perf-script.txt | 7 +++++++
 tools/perf/builtin-script.c              | 4 ++++
 2 files changed, 11 insertions(+)

diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index 2149480..4b8a42e 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -209,6 +209,13 @@ OPTIONS
 --show-mmap-events
 	Display mmap related events (e.g. MMAP, MMAP2).
 
+--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 ce304df..95d3cd9 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -1570,6 +1570,10 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
 		    "Show the fork/comm/exit events"),
 	OPT_BOOLEAN('\0', "show-mmap-events", &script.show_mmap_events,
 		    "Show the mmap events"),
+	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_usage[] = {
-- 
1.8.1