[lldb-dev] Can't debug "hello, world" with stock lldb from XCode 5?

Greg Clayton gclayton at apple.com
Wed Jan 29 16:36:58 PST 2014

The comments below are only if you are building your own LLDB from sources, so please ignore this if you are using a stock Xcode that was installed from the App Store...

If you are using a stock Xcode, try rebooting and see if that helps.


On Jan 29, 2014, at 4:22 PM, Greg Clayton <gclayton at apple.com> wrote:

> You must have made your "lldb_codesign" prior to installing 10.9?
> If you didn't please follow the instructions:
>    % svn cat http://llvm.org/svn/llvm-project/lldb/trunk/docs/code-signing.txt
> If you already have a "lldb_codesign", it now needs to be marked as trusted again after the recent OS install. This is easier than doing everything from scratch, you just need to do:
> - Launch /Applications/Utilities/Keychain Access.app
> - Drag the existing "lldb_codesign" code signing certificate from the "login" keychain to the "System" keychain in the 
> - In the Keychain Access GUI, click and drag "lldb_codesign" in the "System" keychain onto the desktop. The drag will create a "~/Desktop/lldb_codesign.cer" file used in the next step.
> - Switch to Terminal, and run the following:
> % sudo security add-trust -d -r trustRoot -p basic -p codeSign -k /Library/Keychains/System.keychain ~/Desktop/lldb_codesign.cer
> % rm -f ~/Desktop/lldb_codesign.cer
> - Drag the "lldb_codesign" certificate from the "System" keychain back into the "login" keychain
> - Quit Keychain Access
> - delete your old LLDB build folder as it has been code signed by an invalid code signature and will be cached by the kernel
> - Reboot
> You can also run lldb with "sudo" and it will work regardless of the code signing...
> On Jan 29, 2014, at 1:43 PM, Dan Kegel <dank at kegel.com> wrote:
>> Hi!
>> I just installed a fresh copy of Mac OS X 10.9, and on that, XCode 5.
>> Alas, it doesn't seem to be able to debug a trivial C program:
>> $ lldb --version
>> lldb-300.2.53
>> $ gcc -g hello.c
>> $ lldb ./a.out
>> 2014-01-29 13:42:20.095 lldb[273:262f] Metadata.framework [Error]:
>> couldn't get the client port
>> Current executable set to './a.out' (x86_64).
>> (lldb) run
>> Process 3511 launched: './a.out' (x86_64)
>> error: initial process state wasn't stopped: exited
>> Can I buy a clue?
>> Thanks!
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>> lldb-dev at cs.uiuc.edu
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