1. In a computer system having a first process in a first address space, a second process in a second address space, and a managing address space that is authorized to access the first address space and the second address space, a method for transferring information between the first process and the second process, comprising the steps of: mapping a portion of the second address space into the managing address space so as to provide the managing address space with access to the mapped portion, wherein the mapped portion of the second address space is a stack of a procedure contained within the second address space; identifying a stack for a procedure contained within the first address space; and while the managing address space has access to the first address space, copying the information between the mapped portion of the second address space and the first address space by transferring the information directly between the stack of the procedure contained within the second address space and the stack of the procedure contained within the first address space.