我制作了自定义 voip 应用程序。几乎一切都很好；但有时会重新启动应用程序。
From crash log:
Exception Type: 00000020
Exception Codes: 0xbad22222
Highlighted Thread: 4
SBUnsuspendLimit CryptTalkDev[24820] exceeded 15 wakes in 300 sec
Highlighted thread call stack:
Thread 4 name: com.apple.NSURLConnectionLoader
Thread 4:
0 libsystem_kernel.dylib 0x35eab004 0x35eaa000 + 4100
1 libsystem_kernel.dylib 0x35eab1fa 0x35eaa000 + 4602
2 CoreFoundation 0x355d93ec 0x3554c000 + 578540
3 CoreFoundation 0x355d8124 0x3554c000 + 573732
4 CoreFoundation 0x3555b49e 0x3554c000 + 62622
5 CoreFoundation 0x3555b366 0x3554c000 + 62310
6 Foundation 0x35094bb2 0x35084000 + 68530
7 Foundation 0x35094a7a 0x35084000 + 68218
8 Foundation 0x3512858a 0x35084000 + 673162
9 libsystem_c.dylib 0x329c872e 0x329ba000 + 59182
10 libsystem_c.dylib 0x329c85e8 0x329ba000 + 58856
这次没有传入流量 - 我从应用程序日志中检查过。
前几分钟应用程序收到网络更改通知并开始在服务器上重新注册。后台任务开始保护它。在崩溃后台任务完成前一分钟。但是应用程序仍然运行 - 我在日志中看到它！
可能是什么原因？
PS检查今天控制台：
Dec 4 13:57:36 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:57:36 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:57:46 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:57:46 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:57:56 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:57:56 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:58:06 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:58:06 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:58:16 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:58:16 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:58:27 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:58:27 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:58:37 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:58:37 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:58:47 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:58:47 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:58:57 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:58:57 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:59:07 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:59:07 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:59:17 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:59:17 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:59:27 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:59:27 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:59:37 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:59:37 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:59:47 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:59:47 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:59:57 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 13:59:58 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 14:00:08 unknown SpringBoard[51] <Warning>: Unable to deliver SBApplicationNotificationStateChanged notification to port com.apple.springboard.appstatechanged: (ipc/send) timed out
Dec 4 14:00:08 unknown SpringBoard[51] <Warning>: SBUnsuspendLimit CryptTalkDev[3925] exceeded 15 wakes in 300 sec
Dec 4 14:00:08 unknown SpringBoard[51] <Warning>: Forcing crash report of CryptTalkDev[3925]...
Dec 4 14:00:09 unknown ReportCrash[3956] <Notice>: Formulating crash report for process ReportCrash[3955]
Dec 4 14:00:09 unknown SpringBoard[51] <Error>: simulatecrash call failed with status (-308)
Dec 4 14:00:09 unknown SpringBoard[51] <Warning>: Finished crash reporting.
PPS Today 在应用程序上运行 I/O 活动工具。发现两件事：1）应用程序每10秒恢复一次，暂停100-200毫秒，然后再次恢复2）iOS系统调用中有socket I/O；不是 SIP 信令套接字。看起来它类似于 http://trac.pjsip.org/repos/ticket/1482
但困难的部分是找到断开连接的 tcp 套接字......