Add crash detection to test report generation.

As titled, similarly to http://codereview.chromium.org/6508003/, crashes are now detected in Autotest runs and will result in an error being thrown when detected.

The error thrown during crash detection will cause smoke failures and close the tree.

Change-Id: I403833c99c6c37f971bdbe962655ead10a1014c5

BUG=chromium-os:12100
TEST=Ran bvt, smoke with good and bad builds through run_remote_tests.

Review URL: http://codereview.chromium.org/6526031

generate_test_report.py

@@ -113,7 +113,13 @@ class ReportGenerator(object):
     if testdir.startswith(self._options.strip):
       testdir = testdir.replace(self._options.strip, '', 1)
 
-    self._results[testdir] = {'status': status,
+    crashes = []
+    regex = re.compile('Received crash notification for ([-\w]+).+ (sig \d+)')
+    for match in regex.finditer(status_raw):
+      crashes.append('%s %s' % match.groups())
+
+    self._results[testdir] = {'crashes': crashes,
+                              'status': status,
                               'perf': perf}
 
   def _CollectResultsRec(self, resdir):
@@ -176,6 +182,7 @@ class ReportGenerator(object):
     width = self.GetTestColumnWidth()
     line = ''.ljust(width + 5, '-')
 
+    crashes = {}
     tests_pass = 0
     print line
     for test in tests:
@@ -205,6 +212,14 @@ class ReportGenerator(object):
         perf_value_entry = self._color.Color(Color.BOLD, perf[perf_key])
         print perf_key_entry + perf_value_entry
 
+      # Ignore top-level entry, since it's just a combination of all the
+      # individual results.
+      if result['crashes'] and test != tests[0]:
+        for crash in result['crashes']:
+          if not crash in crashes:
+            crashes[crash] = set([])
+          crashes[crash].add(test)
+
     print line
 
     total_tests = len(tests)
@@ -212,6 +227,24 @@ class ReportGenerator(object):
     pass_str = '%d/%d (%d%%)' % (tests_pass, total_tests, percent_pass)
     print 'Total PASS: ' + self._color.Color(Color.BOLD, pass_str)
 
+    if self._options.crash_detection:
+      print ''
+      if crashes:
+        print self._color.Color(Color.RED, 'Crashes detected during testing:')
+        print line
+
+        for crash_name, crashed_tests in sorted(crashes.iteritems()):
+          print self._color.Color(Color.RED, crash_name)
+          for crashed_test in crashed_tests:
+            print ' '*self._KEYVAL_INDENT + crashed_test
+
+        print line
+        print 'Total unique crashes: ' + self._color.Color(Color.BOLD,
+                                                           str(len(crashes)))
+      else:
+        print self._color.Color(Color.GREEN,
+                                'No crashes detected during testing.')
+
     # Print out the client debug information for failed tests.
     if self._options.print_debug:
       for test in tests_with_errors:
@@ -243,7 +276,8 @@ class ReportGenerator(object):
     self._CollectResults()
     self._GenerateReportText()
     for v in self._results.itervalues():
-      if v['status'] != 'PASS':
+      if v['status'] != 'PASS' or (self._options.crash_detection
+                                   and v['crashes']):
         sys.exit(1)
 
 
@@ -255,6 +289,9 @@ def main():
                     help='Use color for text reports [default if TTY stdout]')
   parser.add_option('--no-color', dest='color', action='store_false',
                     help='Don\'t use color for text reports')
+  parser.add_option('--no-crash-detection', dest='crash_detection',
+                    action='store_false', default=True,
+                    help='Don\'t report crashes or error out when detected')
   parser.add_option('--perf', dest='perf', action='store_true',
                     default=True,
                     help='Include perf keyvals in the report [default]')
@@ -268,7 +305,7 @@ def main():
                     help='Don\'t strip a prefix from test directory names')
   parser.add_option('--no-debug', dest='print_debug', action='store_false',
                     default=True,
-                    help='Do not print out the debug log when a test fails.')
+                    help='Don\'t print out the debug log when a test fails.')
   (options, args) = parser.parse_args()
 
   if not args: