fork Cocoa进程并重新初始化Cocoa。怎么样？ [英] fork Cocoa process and re-init Cocoa. how?

问题描述

我试图 fork（）一个Cocoa过程，并设置一个新的Cocoa / ObjC环境，但我得到的错误：

 该进程已分叉，您不能安全地使用此CoreFoundation功能。你必须执行（）。 
打开__THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY ___ YOU_MUST_EXEC __（）进行调试。有没有办法在分叉过程中重新初始化Cocoa / ObjC？
 
 
 
 
 
 
 
我知道有关 fork（）的文档确实有限制，我想知道是否还有办法做，而不只是文档说的。
 
 
 
我试图读取处理execve系统调用（bsd / kern / kern_exec.c）的XNU内核的源代码但我不是用于代码，我不能轻易地说，这是可能或不
解决方案
 Mac OS X严重限制了您在叉子后可以执行的操作，但 exec  ing。请参阅 fork man的CAVEATS部分页面。允许的操作不包括使用Cocoa或CoreFoundation，因此您必须调用 exec 才能启动一个新程序。
 
I tried to fork() a Cocoa process and setup a new Cocoa/ObjC environment but I get the error:
The process has forked and you cannot use this CoreFoundation functionality safely. You MUST exec().
Break on __THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY___YOU_MUST_EXEC__() to debug.
Is there a way to re-initialize Cocoa/ObjC in the forked process?



I know that the documentation about fork() does say it is limited, however I wonder if there is still a way to do it, not just what the documentation says.

I tried to read the source code of the XNU kernel which handles the execve syscall (bsd/kern/kern_exec.c) but I am not that used to the code that I cannot easily say wether it is possible or not to do something similar in userspace or not.
解决方案
Mac OS X severely limits what you can do after a fork without execing. See the CAVEATS section of the fork man page. The allowed actions do not include using Cocoa or CoreFoundation, so you must call exec to start a new program.

                        
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