[tip:perf/core] perf beauty: Add a string table generator for renameat2's flags constants

[tip-bot for Arnaldo Carvalho de Melo]

Commit-ID:  bdc2a9d64a4c4c77c63ce2561bd644d233fcb1fc
Gitweb:     https://git.kernel.org/tip/bdc2a9d64a4c4c77c63ce2561bd644d233fcb1fc
Author:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Tue, 11 Dec 2018 10:16:42 -0300
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 18 Dec 2018 12:23:55 -0300

perf beauty: Add a string table generator for renameat2's flags constants

Using the already copied tools/include/uapi/linux/fs.h file:

  $ tools/perf/trace/beauty/rename_flags.sh
  static const char *rename_flags[] = {
	[0 + 1] = "NOREPLACE",
	[1 + 1] = "EXCHANGE",
	[2 + 1] = "WHITEOUT",
  };
  $

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-ta2jbh03spkymp4sbdh489g8@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/trace/beauty/rename_flags.sh | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/tools/perf/trace/beauty/rename_flags.sh b/tools/perf/trace/beauty/rename_flags.sh
new file mode 100755
index 000000000000..54c87c782ab2
--- /dev/null
+++ b/tools/perf/trace/beauty/rename_flags.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+# Copyright (C) 2018, Red Hat Inc, Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
+# SPDX-License-Identifier: LGPL-2.1
+
+[ $# -eq 1 ] && header_dir=$1 || header_dir=tools/include/uapi/linux/
+
+fs_header=${header_dir}/fs.h
+
+printf "static const char *rename_flags[] = {\n"
+regex='^[[:space:]]*#[[:space:]]*define[[:space:]]+RENAME_([[:alnum:]_]+)[[:space:]]+\(1[[:space:]]*<<[[:space:]]*([[:xdigit:]]+)[[:space:]]*\)[[:space:]]*.*'
+egrep -q $regex ${fs_header} && \
+(egrep $regex ${fs_header} | \
+	sed -r "s/$regex/\2 \1/g"	| \
+	xargs printf "\t[%d + 1] = \"%s\",\n")
+printf "};\n"