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20183186
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0
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0
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2
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2013-11-25T00:52:58.170
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0
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2015-03-03T22:32:27.170
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2015-03-03T22:32:27.170
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3680466
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1889192
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20161144
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2
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3
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text
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Google and Apple developer page are really silent on this issue and finally I've found a good workaround. This error message appears when we get Xcode debugger to attach to the process that is a child process of process being debugged or that is a process already being debugged by Xcode debugger, gdb, or lldb. <img src="https://i.stack.imgur.com/52d34.png" alt="error message"> In order to avoid this irritating message, First put <code>kill(0, SIGSTOP)</code> statement where you want to stop the child process. In the following figure, I have put the <code>kill</code> statement right after the child is created. <img src="https://i.stack.imgur.com/UtPKR.png" alt="enter image description here"> Second, use <code>gcc</code> to compile your source codes with -g option. <pre><code>$ ls GBN.1 gbn.c gbn.h type.h util.c util.h $ gcc *.c -g $ ./a.out [1]+ Stopped ./a.out $ ps -ef | grep a.out 501 628 600 0 9:33AM ttys000 0:00.00 ./a.out 501 629 628 0 9:33AM ttys000 0:00.00 ./a.out </code></pre> Now, all we have to do is to tell Xcode debugger to attach to the process by pid. Click the <code>Debug</code> menu and then find the <code>Attach to process</code> option to click <code>By Process Identifier (PID) or name</code> option. Then type the pid for child process (or parent process) and click attach button. <img src="https://i.stack.imgur.com/su9Uq.png" alt="enter image description here"> Enjoy Debugging! <img src="https://i.stack.imgur.com/gqyOs.png" alt="enter image description here">
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1. POCommand line application: How to attach a child process to xcode debugger?
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