srn_fiber_stack_t Struct Reference

One stack per fiber, mapped with a guard page at the low end so an overflow faults deterministically instead of corrupting a neighbour. More...

#include <fiber.h>

Data Fields
void *	start
	High end, stack pointer initialises to this address.
void *	limit
	Low end of usable region.
void *	guard
	The protected page to detect stack overflows.

Detailed Description

One stack per fiber, mapped with a guard page at the low end so an overflow faults deterministically instead of corrupting a neighbour.

With addresses increasing to the right, the layout is:

|... guard page ...|.......... frames ..........| ^ guard ^ limit ^ start

guard is the mmap base, the lowest page of the region. The stack grows downward, so frames start at the high end (start) and grow toward limit; one step past limit lands on the protected guard page and faults.

Definition at line 218 of file fiber.h.

Field Documentation

guard

void* srn_fiber_stack_t::guard

The protected page to detect stack overflows.

Definition at line 224 of file fiber.h.

limit

void* srn_fiber_stack_t::limit

Low end of usable region.

Definition at line 222 of file fiber.h.

start

void* srn_fiber_stack_t::start

High end, stack pointer initialises to this address.

Definition at line 220 of file fiber.h.

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The documentation for this struct was generated from the following file:

• serene/rt/fiber.h