iOS: Debugging not working in XCode

Question

I\'m using XCode 4 and iOS SDK 4.3. My debugging worked fine but now i discovered that when setting a breakpoint, the app pauses but XCode doesn\'t

Answer 1

I have the same problem. XCode 4 just stops debugging but it doesn't display any errors. When I opened the SYSTEM console, I found this:

3/26/11 4:04:13 PM  Xcode[214]  [MT] Warning in /SourceCache/IDEDebugger/IDEDebugger-208/PlugIns/DebuggerGDB/DevToolsIDE/GDBMIDebuggingPlugin/GDBMI_Adaptor/PBXGDB_StackSequences.m:556
Details:  An unexpected error when executing stack-list-frames-lite : Previous frame inner to this frame (gdb could not unwind past this frame). Please attach your gdb log to your bug report.
Object:   <PBXGDB_UpdateStackSequence: 0x202a57b40>
Method:   -handleErrorForMICommand:
Thread:   <NSThread: 0x200020700>{name = (null), num = 1}
Please file a bug at http://bugreport.apple.com with this warning message and any useful information you can provide.

I have had this problem since XCode 3.2 and I have tried every solution I could find for it, but I have never been able to resolve it. At least XCode 3.2 told me the error. XCode 4 just stops working.

Update: sorry forgot the answer part. Several people have solved this problem by switching their compiler to GCC for the project AND ALL projects that it is linked to. Others have deleted their symbol file for their device version and XCode re-downloaded them and it started working. Niether work for me, but hopefully one will work for you.

Answer 2

In xCode4:

• Your Project Name -> Edit Scheme
• Info tab (in run configuration)
• Set Build Configuration to "Debug", Debugger - to "LLDB" ("GDB" was before)
• Run your project

Worked for me. For "LLDB" green line is visible. Switching back to "GDB" brings me to this issue again.

Answer 3

Try changing the compiler: "GCC_VERSION = com.apple.compilers.llvmgcc42" to "GCC_VERSION = com.apple.compilers.llvm.clang.1_0"

Then compile and run again

Greetings