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use quickcheck_macros::quickcheck;
use std::{alloc::Layout, prelude::v1::*};
use super::*;
use crate::tests::ShadowAllocator;
#[derive(Debug)]
struct Alloc {
ptr: NonNull<u8>,
layout: Layout,
}
macro_rules! gen_test {
($mod:ident, $($tt:tt)*) => {
mod $mod {
use super::*;
type TheTlsf = GlobalTlsf<$($tt)*>;
#[quickcheck]
fn calloc_random(bytecode: Vec<u8>) {
let tlsf: TheTlsf = TheTlsf::DEFAULT;
let mut allocs = Vec::new();
calloc_random_inner(&tlsf, &mut allocs, bytecode);
// Deallocate all remaining allocations
for alloc in allocs.iter() {
unsafe { CAlloc::deallocate(&tlsf, alloc.ptr) };
}
}
fn calloc_random_inner(tlsf: &TheTlsf, allocs: &mut Vec<Alloc>, bytecode: Vec<u8>) -> Option<()> {
let mut sa = ShadowAllocator::new_filled_with_free();
let mut it = bytecode.iter().cloned();
loop {
match it.next()? % 8 {
0..=2 => {
if allocs.len() > 64 {
continue;
}
let len = u32::from_le_bytes([
it.next()?,
0,
0,
0,
]) as usize;
let align = 1 << (it.next()? % 6);
let layout = Layout::from_size_align(len, align).unwrap();
log::trace!("alloc {:?}", layout);
let ptr = CAlloc::allocate(tlsf, layout);
log::trace!(" → {:?}", ptr);
if let Some(ptr) = ptr {
assert!(unsafe { CAlloc::allocation_usable_size(tlsf, ptr) } >= len);
allocs.push(Alloc { ptr, layout });
sa.allocate(layout, ptr);
}
}
3..=5 => {
let alloc_i = it.next()?;
if allocs.len() > 0 {
let alloc = allocs.swap_remove(alloc_i as usize % allocs.len());
log::trace!("dealloc {:?}", alloc);
unsafe { CAlloc::deallocate(tlsf, alloc.ptr) };
sa.deallocate(alloc.layout, alloc.ptr);
}
}
6..=7 => {
let alloc_i = it.next()?;
if allocs.len() > 0 {
let len = u32::from_le_bytes([
it.next()?,
0,
0,
0,
]) as usize;
let align = 1 << (it.next()? % 6);
let alloc_i = alloc_i as usize % allocs.len();
let alloc = &mut allocs[alloc_i];
let new_layout = Layout::from_size_align(len, align).unwrap();
log::trace!("realloc {:?} to {:?}", alloc, new_layout);
if let Some(ptr) = unsafe { CAlloc::reallocate(tlsf, alloc.ptr, new_layout) } {
log::trace!(" {:?} → {:?}", alloc.ptr, ptr);
sa.deallocate(alloc.layout, alloc.ptr);
alloc.ptr = ptr;
alloc.layout = new_layout;
sa.allocate(alloc.layout, alloc.ptr);
} else {
log::trace!(" {:?} → fail", alloc.ptr);
}
}
}
_ => unreachable!(),
}
}
}
}
};
}
gen_test!(default_globaltlsf, ());
gen_test!(small_globaltlsf, SmallGlobalTlsfOptions);