From fcc6d4bd76874585336cb0bbbd369702b59515d2 Mon Sep 17 00:00:00 2001
From: Paul Elder <paul.elder@ideasonboard.com>
Date: Mon, 19 Oct 2020 19:18:17 +0900
Subject: libcamera: tracing: Implement tracing infrastructure

Implement tracing infrastructure in libcamera. It takes .tp files, as
required by lttng, and generates a tracepoint header and C file, as lttng
requires. meson is updated accordingly to get it to compile with the
rest of libcamera. Update the documentation accordingly.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
---
 utils/tracepoints/gen-tp-header.py | 38 ++++++++++++++++++++++++++++++++++++++
 utils/tracepoints/meson.build      |  5 +++++
 2 files changed, 43 insertions(+)
 create mode 100644 utils/tracepoints/gen-tp-header.py
 create mode 100644 utils/tracepoints/meson.build

(limited to 'utils/tracepoints')

diff --git a/utils/tracepoints/gen-tp-header.py b/utils/tracepoints/gen-tp-header.py
new file mode 100644
index 00000000..bbd472d9
--- /dev/null
+++ b/utils/tracepoints/gen-tp-header.py
@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (C) 2020, Google Inc.
+#
+# Author: Paul Elder <paul.elder@ideasonboard.com>
+#
+# gen-tp-header.py - Generate header file to contain lttng tracepoints
+
+import datetime
+import jinja2
+import os
+import sys
+
+def main(argv):
+    if len(argv) < 3:
+        print(f'Usage: {argv[0]} output template tp_files...')
+        return 1
+
+    output = argv[1]
+    template = argv[2]
+
+    year = datetime.datetime.now().year
+    path = output.replace('include/', '', 1)
+
+    source = ''
+    for fname in argv[3:]:
+        source += open(fname, 'r', encoding='utf-8').read() + '\n\n'
+
+    template = jinja2.Template(open(template, 'r', encoding='utf-8').read())
+    string = template.render(year=year, path=path, source=source)
+
+    f = open(output, 'w', encoding='utf-8').write(string)
+
+    return 0
+
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))
diff --git a/utils/tracepoints/meson.build b/utils/tracepoints/meson.build
new file mode 100644
index 00000000..807230fc
--- /dev/null
+++ b/utils/tracepoints/meson.build
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: CC0-1.0
+
+py_modules += ['jinja2']
+
+gen_tracepoints_header = find_program('./gen-tp-header.py')
-- 
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