stack-frame

Vocabulary

compiler.cfg.stack-frame

Class description

Counts in bytes of the various sizes of the blocks of the stack frame. The stack frame is organized in the following fashion, from bottom to top:

•	Parameter space: space for parameters to FFI functions
•	Allocation area: space for local allocations.
•	Spill area: space for register spills.
•	Reserved stack space: only applicable on Windows x86.64. See reserved-stack-space.
•	One final cell of padding.

The stack frame is also aligned to a 16 byte boundary. It has the following slots:

total-size	Total size of the stack frame.
params	Reserved parameter space.
allot-area-base	Base offset of the allocation area.
allot-area-size	Number of bytes requires for the allocation area.
allot-area-align	This slot is always at least cell bytes.
spill-area-base	Base offset for the spill area.
spill-area-size	Number of bytes requires for all spill slots.
spill-area-align	This slot is always at least cell bytes.

See also

align-stack

Definition

USING: math ;

IN: compiler.cfg.stack-frame

TUPLE: stack-frame
    { params integer initial: 0 }
    { allot-area-size integer initial: 0 }
    { allot-area-align integer initial: 0 }
    { spill-area-size integer initial: 0 }
    { spill-area-align integer initial: 0 }
    { total-size integer initial: 0 }
    { allot-area-base integer initial: 0 }
    { spill-area-base integer initial: 0 } ;