crash-reporter: Capture and send recent update_engine logs when it crashes

crash_sender

 #!/bin/sh
 
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 set -e
 
 # Product ID in crash report
 CHROMEOS_PRODUCT=ChromeOS
@@ skipping 191 matching lines @@
   local meta_path="$1"
   local report_payload="$(get_key_value "${meta_path}" "payload")"
   local kind="$(get_kind "${meta_path}")"
   local exec_name="$(get_key_value "${meta_path}" "exec_name")"
   local sleep_time=$(generate_uniform_random $SECONDS_SEND_SPREAD)
   local url="${REPORT_UPLOAD_PROD_URL}"
   local chromeos_version="$(get_key_value "${meta_path}" "ver")"
   local board="$(get_board)"
   local hwclass="$(get_hardware_class)"
   local write_payload_size="$(get_key_value "${meta_path}" "payload_size")"
+  local log="$(get_key_value "${meta_path}" "log")"
   local sig="$(get_key_value "${meta_path}" "sig")"
   local send_payload_size="$(stat --printf=%s "${report_payload}" 2>/dev/null)"
 
   local extra_key1="write_payload_size"
   local extra_value1="${write_payload_size}"
   local extra_key2="send_payload_size"
   local extra_value2="${send_payload_size}"
   if [ "${sig}" != "undefined" ]; then
     extra_key1="sig"
     extra_value1="${sig}"
     extra_key2="sig2"
     extra_value2="${sig}"
+  elif [ "${log}" != "undefined" ]; then
+    # Upload a log file if it was specified.
+    extra_key1="log"
+    extra_value1="@${log}"
   fi
 
   lecho "Sending crash:"
   lecho "  Scheduled to send in ${sleep_time}s"
   lecho "  Metadata: ${meta_path} (${kind})"
   lecho "  Payload: ${report_payload}"
   lecho "  Version: ${chromeos_version}"
   if is_mock; then
     lecho "  Product: ${CHROMEOS_PRODUCT}"
     lecho "  URL: ${url}"
@@ skipping 164 matching lines @@
   TMP_DIR="$(mktemp -d /tmp/crash_sender.XXXX)"
 
   # Send system-wide crashes
   send_crashes "/var/spool/crash"
 
   # Send user-specific crashes
   send_crashes "/home/chronos/user/crash"
 }
 
 main