From c551f43206405019121bd2b2c93714319a0a3300 Mon Sep 17 00:00:00 2001
From: Allan Sandfeld Jensen <allan.jensen@qt.io>
Date: Thu, 23 Jan 2020 17:21:03 +0100
Subject: BASELINE: Update Chromium to 79.0.3945.139

Change-Id: I336b7182fab9bca80b709682489c07db112eaca5
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
---
 chromium/build/fuchsia/emu_target.py | 92 ++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 chromium/build/fuchsia/emu_target.py

(limited to 'chromium/build/fuchsia/emu_target.py')

diff --git a/chromium/build/fuchsia/emu_target.py b/chromium/build/fuchsia/emu_target.py
new file mode 100644
index 00000000000..1aa6e420d05
--- /dev/null
+++ b/chromium/build/fuchsia/emu_target.py
@@ -0,0 +1,92 @@
+# Copyright 2019 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.
+
+"""Implements commands for running/interacting with Fuchsia on an emulator."""
+
+import boot_data
+import logging
+import os
+import subprocess
+import sys
+import target
+import tempfile
+
+class EmuTarget(target.Target):
+  def __init__(self, output_dir, target_cpu, system_log_file):
+    """output_dir: The directory which will contain the files that are
+                   generated to support the emulator deployment.
+    target_cpu: The emulated target CPU architecture.
+                Can be 'x64' or 'arm64'."""
+    super(EmuTarget, self).__init__(output_dir, target_cpu)
+    self._emu_process = None
+    self._system_log_file = system_log_file
+
+  def __enter__(self):
+    return self
+
+  def _GetEmulatorName(self):
+    pass
+
+  def _BuildCommand(self):
+    """Build the command that will be run to start Fuchsia in the emulator."""
+    pass
+
+  # Used by the context manager to ensure that the emulator is killed when
+  # the Python process exits.
+  def __exit__(self, exc_type, exc_val, exc_tb):
+    self.Shutdown();
+
+  def Start(self):
+    emu_command = self._BuildCommand()
+
+    # We pass a separate stdin stream. Sharing stdin across processes
+    # leads to flakiness due to the OS prematurely killing the stream and the
+    # Python script panicking and aborting.
+    # The precise root cause is still nebulous, but this fix works.
+    # See crbug.com/741194.
+    logging.debug('Launching %s.' % (self._GetEmulatorName()))
+    logging.debug(' '.join(emu_command))
+
+    # Zircon sends debug logs to serial port (see kernel.serial=legacy flag
+    # above). Serial port is redirected to a file through emulator stdout.
+    # Unless a |_system_log_file| is explicitly set, we output the kernel serial
+    # log to a temporary file, and print that out if we are unable to connect to
+    # the emulator guest, to make it easier to diagnose connectivity issues.
+    temporary_system_log_file = None
+    if self._system_log_file:
+      stdout = self._system_log_file
+      stderr = subprocess.STDOUT
+    else:
+      temporary_system_log_file = tempfile.NamedTemporaryFile('w')
+      stdout = temporary_system_log_file
+      stderr = sys.stderr
+
+    self._emu_process = subprocess.Popen(emu_command, stdin=open(os.devnull),
+                                          stdout=stdout, stderr=stderr)
+
+    try:
+      self._WaitUntilReady();
+    except target.FuchsiaTargetException:
+      if temporary_system_log_file:
+        logging.info('Kernel logs:\n' +
+                     open(temporary_system_log_file.name, 'r').read())
+      raise
+
+  def Shutdown(self):
+    if self._IsEmuStillRunning():
+      logging.info('Shutting down %s' % (self._GetEmulatorName()))
+      self._emu_process.kill()
+
+  def _IsEmuStillRunning(self):
+    if not self._emu_process:
+      return False
+    return os.waitpid(self._emu_process.pid, os.WNOHANG)[0] == 0
+
+  def _GetEndpoint(self):
+    if not self._IsEmuStillRunning():
+      raise Exception('%s quit unexpectedly.' % (self._GetEmulatorName()))
+    return ('localhost', self._host_ssh_port)
+
+  def _GetSshConfigPath(self):
+    return boot_data.GetSSHConfigPath(self._output_dir)
\ No newline at end of file
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