Breakpoint on os_log gets hit three times

Question

Macho Man Randy Savage OP

Created Dec ’22

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When I set breakpoints on os_log statements like below:

os_log_debug(OS_LOG_DEFAULT, "hi"); //<--break point RIGHT on this line….

I have to click the "Continue Program Execution" button three times to actually continue program execution. At first I thought my method was being called multiple times unexpectedly but it’s not. I just have to keep hitting the continue program execution button. I’m not hitting “Step over” or “step into”. I’m hitting the “Continue Program Execution” button.

FB9792745

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Answer 1

DTS Engineer OP

Apple

Dec ’22

The reason why this is happening is that os_log_debug is not a function but a macro, and so the breakpoint ends up being instantiated multiple times based on its expansion.

FB9792745

Thanks for that.

As to a workaround, go to the Breakpoints navigator, click the chevron next to your breakpoint to disclose the ‘child’ breakpoints, and disable all but one.

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