Everything
2.10.3.1 Step in function (Step in execution)

When the function is called, the program is stopped at the top of the called function.

Click the button on the debug toolbar to perform Step in execution.

Caution 1.

Step in execution for a function without the debug information is not possible.

Caution 2.

If Step in execution is performed for the longjmp function, program execution may not complete and may wait for a time-out.

Caution 3.

The beginning of the function (prologue processing) is not skipped. To skip prologue processing, perform Step in execution again.