Growable stack

[loongs-zhang]

maybe_grow in lib.rs, if it becomes full again after expansion, I believe it will receive a SIGBUS/SIGSEGV signal.

Is it possible to increase the stack multiple times in the future?

[nagisa]

Yes, you can call maybe_grow recursively for as long as you have memory available.

[loongs-zhang]

Yes, of course that's possible. What I want to ask is, can it be automatically wrapped? For example, using a macro, as long as the method calls are inside the macro, each method call is converted to be wrapped in maybe_row before making the original call.

original call:

fn call1() {
    // code may cause stack overflow
}
fn call2() {
    call1();
    call1();
    call1();
    ......
    // many times of call1()
}

usage:

// 4096/131072 is just a example
maybe_grow!(4096, 131072, call2)

expected effect:

fn enhanced_call2() {
    stacker::maybe_grow(4096,131072, call1);
    stacker::maybe_grow(4096,131072, call1);
    stacker::maybe_grow(4096,131072, call1);
    stacker::maybe_grow(4096,131072, call1);
    ......
    // many times of stacker::maybe_grow(4096,131072, call1);
}