region-rs

Cross-platform virtual memory API

This crate provides a cross-platform Rust API for allocating, querying and manipulating virtual memory. It is a thin abstraction, with the underlying interaction implemented using platform specific APIs (e.g VirtualQuery, VirtualAlloc, VirtualLock, mprotect, mmap, mlock).

Platforms

This library is continuously tested against these targets:

• Linux
• aarch64-linux-android
• armv7-unknown-linux-gnueabihf
• i686-unknown-linux-gnu
• mips-unknown-linux-gnu
• x86_64-unknown-linux-gnu
• x86_64-unknown-linux-musl
• Windows
• i686-pc-windows-gnu
• i686-pc-windows-msvc
• x86_64-pc-windows-gnu
• x86_64-pc-windows-msvc
• macOS
• x86_64-apple-darwin
• NetBSD
• x86_64-unknown-netbsd
• FreeBSD
• x86_64-unknown-freebsd
• OpenBSD
• x86_64-unknown-openbsd

... and continuously checked against these targets:

• Illumos
• x86_64-unknown-illumos

Beyond the aformentioned target triplets, the library is also expected to work against a multitude of omitted architectures.

Installation

Add this to your Cargo.toml:

[dependencies]
region = "3.0.2"

Example

• Cross-platform equivalents:

let data = [0xDE, 0xAD, 0xBE, 0xEF];

// Page size
let pz = region::page::size();

// VirtualQuery | '/proc/self/maps'
let q  = region::query(data.as_ptr())?;
let qr = region::query_range(data.as_ptr(), data.len())?;

// VirtualAlloc | mmap
let alloc = region::alloc(100, Protection::READ_WRITE)?;

// VirtualProtect | mprotect
region::protect(data.as_ptr(), data.len(), Protection::READ_WRITE_EXECUTE)?;

// ... you can also temporarily change one or more pages' protection
let handle = region::protect_with_handle(data.as_ptr(), data.len(), Protection::READ_WRITE_EXECUTE)?;

// VirtualLock | mlock
let guard = region::lock(data.as_ptr(), data.len())?;