1 files changed, 70 insertions, 0 deletions
diff --git a/third_party/libwebrtc/build/fuchsia/symbolizer.py b/third_party/libwebrtc/build/fuchsia/symbolizer.py
new file mode 100644
index 0000000000..8469d11046
--- /dev/null
+++ b/third_party/libwebrtc/build/fuchsia/symbolizer.py
@@ -0,0 +1,70 @@
+# 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.
+
+import logging
+import os
+import subprocess
+
+from common import SDK_ROOT
+from common import GetHostArchFromPlatform
+from common import GetHostToolPathFromPlatform
+
+
+def BuildIdsPaths(package_paths):
+  """Generates build ids paths for symbolizer processes."""
+
+  build_ids_paths = map(
+      lambda package_path: os.path.join(
+          os.path.dirname(package_path), 'ids.txt'),
+      package_paths)
+  return build_ids_paths
+
+
+def RunSymbolizer(input_file, output_file, build_ids_files):
+  """Starts a symbolizer process.
+
+  input_file: Input file to be symbolized.
+  output_file: Output file for symbolizer stdout and stderr.
+  build_ids_file: Path to the ids.txt file which maps build IDs to
+                  unstripped binaries on the filesystem.
+  Returns a Popen object for the started process."""
+
+  symbolizer = GetHostToolPathFromPlatform('symbolizer')
+  symbolizer_cmd = [
+      symbolizer, '--build-id-dir',
+      os.path.join(SDK_ROOT, '.build-id')
+  ]
+  for build_ids_file in build_ids_files:
+    symbolizer_cmd.extend(['--ids-txt', build_ids_file])
+
+  logging.info('Running "%s".' % ' '.join(symbolizer_cmd))
+  return subprocess.Popen(symbolizer_cmd, stdin=input_file, stdout=output_file,
+                          stderr=subprocess.STDOUT, close_fds=True)
+
+
+def SymbolizerFilter(input_file, build_ids_files):
+  """Symbolizes an output stream from a process.
+
+  input_file: Input file to be symbolized.
+  build_ids_file: Path to the ids.txt file which maps build IDs to
+                  unstripped binaries on the filesystem.
+  Returns a generator that yields symbolized process output."""
+
+  symbolizer_proc = RunSymbolizer(input_file, subprocess.PIPE, build_ids_files)
+
+  while True:
+    # TODO(chonggu): Switch to encoding='utf-8' once we drop Python 2
+    # support.
+    line = symbolizer_proc.stdout.readline().decode('utf-8')
+    if not line:
+      break
+
+    # Skip spam emitted by the symbolizer that obscures the symbolized output.
+    # TODO(https://crbug.com/1069446): Fix the symbolizer and remove this.
+    if '[[[ELF ' in line:
+      continue
+
+    yield line
+
+  symbolizer_proc.wait()