1 files changed, 62 insertions, 0 deletions
diff --git a/third_party/libwebrtc/build/config/fuchsia/build_symbol_archive.py b/third_party/libwebrtc/build/config/fuchsia/build_symbol_archive.py
new file mode 100755
index 0000000000..c763627bf9
--- /dev/null
+++ b/third_party/libwebrtc/build/config/fuchsia/build_symbol_archive.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python
+#
+# Copyright 2018 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Creates a compressed archive of unstripped binaries cataloged by
+"ids.txt"."""
+
+import argparse
+import os
+import subprocess
+import sys
+import tarfile
+
+
+def main(args):
+  parser = argparse.ArgumentParser()
+  parser.add_argument('ids_txt', type=str, nargs=1,
+                      help='Path to ids.txt files.')
+  parser.add_argument('-o', '--output_tarball', nargs=1, type=str,
+                      help='Path which the tarball will be written to.')
+  parser.add_argument('--fuchsia-build-id-dir', type=str, required=True,
+                      help='Directory containing symbols for SDK prebuilts.')
+  args = parser.parse_args(args)
+
+  ids_txt = args.ids_txt[0]
+  build_ids_archive = tarfile.open(args.output_tarball[0], 'w:bz2')
+  for line in open(ids_txt, 'r'):
+    build_id, binary_path = line.strip().split(' ')
+
+    # Look for prebuilt symbols in the SDK first.
+    symbol_source_path = os.path.join(args.fuchsia_build_id_dir,
+                                      build_id[:2],
+                                      build_id[2:] + '.debug')
+    if not os.path.exists(symbol_source_path):
+      symbol_source_path = os.path.abspath(
+          os.path.join(os.path.dirname(ids_txt), binary_path))
+
+      if os.path.getsize(symbol_source_path) == 0:
+        # This is a prebuilt which wasn't accompanied by SDK symbols.
+        continue
+
+    # Exclude stripped binaries (indicated by their lack of symbol tables).
+    readelf_output = subprocess.check_output(
+        ['readelf', '-S', symbol_source_path], universal_newlines=True)
+    if not '.symtab' in readelf_output:
+      continue
+
+    # Archive the unstripped ELF binary, placing it in a hierarchy keyed to the
+    # GNU build ID. The binary resides in a directory whose name is the first
+    # two characters of the build ID, with the binary file itself named after
+    # the remaining characters of the build ID. So, a binary file with the build
+    # ID "deadbeef" would be located at the path 'de/adbeef.debug'.
+    build_ids_archive.add(symbol_source_path,
+                          '%s/%s.debug' % (build_id[:2], build_id[2:]))
+
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv[1:]))