1 files changed, 78 insertions, 0 deletions
diff --git a/third_party/libwebrtc/build/fuchsia/runner_exceptions.py b/third_party/libwebrtc/build/fuchsia/runner_exceptions.py
new file mode 100644
index 0000000000..03f872e453
--- /dev/null
+++ b/third_party/libwebrtc/build/fuchsia/runner_exceptions.py
@@ -0,0 +1,78 @@
+# Copyright 2020 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.
+
+"""Converts exceptions to return codes and prints error messages.
+
+This makes it easier to query build tables for particular error types as
+exit codes are visible to queries while exception stack traces are not."""
+
+import errno
+import fcntl
+import logging
+import os
+import subprocess
+import sys
+import traceback
+
+from target import FuchsiaTargetException
+
+def _PrintException(value, trace):
+  """Prints stack trace and error message for the current exception."""
+
+  traceback.print_tb(trace)
+  print(str(value))
+
+
+def IsStdoutBlocking():
+  """Returns True if sys.stdout is blocking or False if non-blocking.
+
+  sys.stdout should always be blocking.  Non-blocking is associated with
+  intermittent IOErrors (crbug.com/1080858).
+  """
+
+  nonblocking = fcntl.fcntl(sys.stdout, fcntl.F_GETFL) & os.O_NONBLOCK
+  return not nonblocking
+
+
+def HandleExceptionAndReturnExitCode():
+  """Maps the current exception to a return code and prints error messages.
+
+  Mapped exception types are assigned blocks of 8 return codes starting at 64.
+  The choice of 64 as the starting code is based on the Advanced Bash-Scripting
+  Guide (http://tldp.org/LDP/abs/html/exitcodes.html).
+
+  A generic exception is mapped to the start of the block.  More specific
+  exceptions are mapped to numbers inside the block.  For example, a
+  FuchsiaTargetException is mapped to return code 64, unless it involves SSH
+  in which case it is mapped to return code 65.
+
+  Exceptions not specifically mapped go to return code 1.
+
+  Returns the mapped return code."""
+
+  (type, value, trace) = sys.exc_info()
+  _PrintException(value, trace)
+
+  if type is FuchsiaTargetException:
+    if 'ssh' in str(value).lower():
+      print('Error: FuchsiaTargetException: SSH to Fuchsia target failed.')
+      return 65
+    return 64
+  elif type is IOError:
+    if value.errno == errno.EAGAIN:
+      logging.info('Python print to sys.stdout probably failed')
+      if not IsStdoutBlocking():
+        logging.warn('sys.stdout is non-blocking')
+      return 73
+    return 72
+  elif type is subprocess.CalledProcessError:
+    if os.path.basename(value.cmd[0]) == 'scp':
+      print('Error: scp operation failed - %s' % str(value))
+      return 81
+    if os.path.basename(value.cmd[0]) == 'qemu-img':
+      print('Error: qemu-img fuchsia image generation failed.')
+      return 82
+    return 80
+  else:
+    return 1