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会发生死锁，it may lead to dead lock #21

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zhongqishi opened this issue Mar 21, 2018 · 3 comments

zhongqishi commented Mar 21, 2018 •

edited

此组件在一些情况下会发生死锁，不知道项目大神们有没有什么建议
未能稳定复现此问题，故不知道原因在哪

This project will lead to deadlock under certain circumstances. Still trying to find what happened.

zhongqishi changed the title ~~会发生死锁~~ 会发生死锁，it may lead to dead lock

zhongqishi closed this as completed

zhongqishi reopened this

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zhongqishi commented Oct 21, 2018

阅读源码后已解决会出现的死锁以及崩溃bug，死锁的出现时因为之前版本采用的OSSpinLock，你下载最新版本，最新采用的是pthread_mutex_lock锁，良好运行测试两天未出现死锁问题了。
崩溃出现的问题在于，有几率开启mmap不成功，但是内存却超过了设定的dump日志限制，这时HighSpeedLogger这个C++对象是NULL，从而导致崩溃，比较简单的处理就是没有mmap成功就不开启定时dump日志，并且直接调用stop方法，停止这次内存监控。

感谢回复，这几天学习iOS技术的时候发现了OSSpinLock因为系统线程优先级造成的死锁，正在找机会改进

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