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| proc [2019/06/06 08:38] – [Recursion] neils | proc [2019/06/13 20:55] – [Recursion] neils | ||
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| When the compiler detects direct recursion, it generates code to save local variables and procedure parameters on the stack and restore them when the procedure returns. | When the compiler detects direct recursion, it generates code to save local variables and procedure parameters on the stack and restore them when the procedure returns. | ||
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| + | ==== Prevent stack overflow ==== | ||
| **Be careful with recursion**. The C64's stack is very small, it's very easy to provoke a stack overflow. To estimate how big stack space you'll need, you can use this formula: | **Be careful with recursion**. The C64's stack is very small, it's very easy to provoke a stack overflow. To estimate how big stack space you'll need, you can use this formula: | ||
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| Always leave some stack space for normal operations as well (8-16 bytes in general, but this can be more depending on the context). | Always leave some stack space for normal operations as well (8-16 bytes in general, but this can be more depending on the context). | ||
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| + | **Tip**: a good practice to prevent stack overflow is to move as many local variables to the global scope as possible. | ||