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I took a brief look into Windows public API, even with a tight coupling between compiler/toolchain & OS they don't offer a way to increase the region for a stack after a thread has been created.

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But if you're on 64-bit; you can just create the threads with a huge stack size limit (e.g. 1GB) and let the OS handle automatically growing the actual stack size. No need to reinvent the wheel.

Stack size is the one area where Windows does have something like "overcommit" by default, as you can separately configure the reserved and commit sizes of the stack: https://learn.microsoft.com/en-us/windows/win32/procthread/t...

This just delays the problem though

Yes, this approach works on other platforms too. However I believe that this will not deallocate stack space, while stacker will.

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