How to disable assembly in Xcode's debugger window?

For some reason my Xcode debugger shows assembly code when debugging an iPhone app code. I开发者_JAVA百科'd like to see only Objective-C code, not assembly. This used to work OK but now something has changed. How to get back to "normal" debugging? Is there a setting in Xcode somewhere?

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@AlexR: To see the source code in Xcode 4.4, switch off Show Disassembly When Debugging over here: Product -> Debug Workflow -> Show Disassembly When Debugging

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In Xcode 3.x: Run -> Debugger Display -> Source Only

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In Xcode 8.2.1:

1. Click Menu item "Debug"
2. Select "Debug Workflow"
3. Click the "Always Show Disassembly", so that no checkmark appears.

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I'm having the same problem despite having unchecked the "Always show disassembly" option. Contacted Apple and they said

"This is usally a permissions problem or an issue with dSYMs not being found by the debugger due to a bad .lldbinit file."