mirrors/embedded-trainings-2020
1
0
Fork 0
mirror of https://github.com/ferrous-systems/embedded-trainings-2020.git synced 2024-05-21 01:38:30 +00:00
Code Issues Projects Releases Wiki Activity

provoke stack overflow more blatantly

Browse source
This commit is contained in:
Lotte Steenbrink 2021-01-22 12:40:17 +01:00
parent fdc56a32e2
commit 4cdb377855
1 changed files with 9 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
advanced/firmware/src/bin/stack_overflow.rs
View file

@ -10,7 +10,8 @@ fn main() -> ! {
// board initialization // board initialization
dk::init().unwrap(); dk::init().unwrap();
log::info!("fib(100) = {:?}", fib(100)); log::info!("provoking stack overflow...");
spam();
loop { loop {
asm::bkpt(); asm::bkpt();
@ -18,13 +19,12 @@ fn main() -> ! {
} }
#[inline(never)] #[inline(never)]
fn fib(n: u32) -> u32 { fn spam() {
// allocate and initialize one kilobyte of stack memory to provoke stack overflow // allocate and initialize one kilobyte of stack memory to provoke stack overflow quicker
let _use_stack = [0xAA; 1024]; let use_stack = [0xAA; 1024];
let addr = &use_stack as *const i32;
if n < 2 { log::info!("address of current `use_stack`: {:?}", addr);
1
} else { spam(); // infinite recursion
fib(n - 1) + fib(n - 2) // recursion
}
} }