LC

Custom Allocator in Rust

hard4/10

Unsafe Rust: Raw Pointers No-Std Rust Program

Language

Compiler

2.0s Limit 256MB

Implementation

Implement a custom allocator using the GlobalAlloc trait in Rust.

Requirements:

Implement bump pointer allocator
Handle alignment requirements
Track allocation size
Implement alloc and dealloc
Register as global allocator
Test with Vec, Box, etc.
Handle out of memory gracefully

Why This Matters

Rust's GlobalAlloc trait lets you swap allocators fleet-wide — Discord moved services to jemalloc and companies routinely use mimalloc for wins — and embedded Rust requires writing your own for heapless targets. Implementing one teaches the alignment/layout contract that underlies every Box and Vec.

Hints

0 / 3 revealed

Validation Suite

main.c

Workspace 1.0