At 11:57 on 10/24/2002 EDT, Jason Gloudon <[EMAIL PROTECTED]> wrote: > On Wed, Oct 23, 2002 at 11:23:26PM -0400, Josh Wilmes wrote: > > > I've got a patch which switches this detection to happen at run-time > > instead of at build-time. This is going to be necessary for miniparrot > > (which has no "Configure" step) anyway. > > Have you checked how much this affects the performance of stack walking ?
It shouldn't at all. It does the check once, when parrot starts up. > One way of simplifying things here is to always walk the stack in the same > direction (lowest address to higher address), and swap the lo and high pointe r > as the start and end points of the loop. This eliminates the need for an > explicit stack growth direction test. > > One thing that will still remain is that the garbage collector must know the > CPU instruction set so it can use the appropriate means to locate pointers in > registers. I'm not sure if this can be done by testing for preprocessor symbo ls > alone. *eyes glazed over* --Josh
