In iossim, ignore harmless messages from launchd.

testing/iossim/iossim.mm

 // Copyright (c) 2012 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 <Foundation/Foundation.h>
 #include <asl.h>
 #include <libgen.h>
 #include <stdarg.h>
 #include <stdio.h>
 
@@ skipping 273 matching lines @@
   // messages from launchd that refer to the simulated app's PID. Limit query
   // to messages in the last minute since PIDs are cyclical.
   aslmsg query = asl_new(ASL_TYPE_QUERY);
   asl_set_query(query, ASL_KEY_SENDER, "launchd",
                 ASL_QUERY_OP_EQUAL | ASL_QUERY_OP_SUBSTRING);
   asl_set_query(query, ASL_KEY_REF_PID,
                 [[[session simulatedApplicationPID] stringValue] UTF8String],
                 ASL_QUERY_OP_EQUAL);
   asl_set_query(query, ASL_KEY_TIME, "-1m", ASL_QUERY_OP_GREATER_EQUAL);
 
-  // Log any messages found.
+  // Log any messages found, and take note of any messages that may indicate the
+  // app crashed or did not exit cleanly.
   aslresponse response = asl_search(NULL, query);
-  BOOL entryFound = NO;
+  BOOL badEntryFound = NO;
   aslmsg entry;
   while ((entry = aslresponse_next(response)) != NULL) {
-    entryFound = YES;
-    LogWarning(@"Console message: %s", asl_get(entry, ASL_KEY_MSG));
+    const char* message = asl_get(entry, ASL_KEY_MSG);
+    LogWarning(@"Console message: %s", message);
+    // Some messages are harmless, so don't trigger a failure for them.
+    if (strstr(message, "The following job tried to hijack the service"))
+      continue;
+    badEntryFound = YES;
   }
 
-  // launchd only sends messages if the process crashed or exits with a
-  // non-zero status, so if the query returned any results iossim should exit
-  // with non-zero status.
-  if (entryFound) {
+  // If the query returned any nasty-looking results, iossim should exit with
+  // non-zero status.
+  if (badEntryFound) {
     LogError(@"Simulated app crashed or exited with non-zero status");
     exit(kExitAppCrashed);
   }
   exit(kExitSuccess);
 }
 @end
 
 namespace {
 
 // Finds the developer dir via xcode-select or the DEVELOPER_DIR environment
@@ skipping 398 matching lines @@
              [error localizedDescription],
              [error domain], static_cast<long int>([error code]));
   }
 
   // Note that this code is only executed if the simulator fails to start
   // because once the main run loop is started, only the delegate calling
   // exit() will end the program.
   [pool drain];
   return kExitFailure;
 }