Is the stack of a forked process shared with its parent?
If so, does this happen via shared copy-on-write pages?
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2[This](https://stackoverflow.com/a/21220399/13998163) might be the answer you need. – vmemmap Apr 24 '22 at 19:40
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@Roi That does not answer whether the stack is really copied or only shared via copy-on-write pages. The linked “duplicate” question is also about the heap, which I already knew was using the copy-on-write mechanism. – HappyFace Apr 25 '22 at 06:15
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Virtually not, practically it is CoW-ed on a deeper level (copy-on-write). So the process can see everything as if it would be a fully copied stack. But in practice, no copy happens, only the changed pages will be copied on need. – peterh Apr 25 '22 at 20:24