A simple memory allocator for executable code. Use JitAllocator type to allocate/release memory and virtual_memory module functions to enable proper access for executable code. So if you want to allocate a new code to execute it is usually done like this:
```rust use jitallocator::*; let compiledcode = ...; let compiledcodesize = ...;
let mut jitallocator = JitAllocator::new(Default::default()); let (rx, rw) = jitallocator.alloc(size)?;
protectjitmemory(ProtectJitAccess::ReadWrite); // allows to write to RWX code in current thread, // it is no-op on all platforms except macOS AArch64 unsafe { copynonoverlapping(compiledcode, rw, compiledcodesize); } protectjitmemory(ProtectJitAccess::ReadExecute); // disables writes to RWX code in current thread, // it is no-op on all platforms except macOS AArch64 flushinstructioncache(rx, compiledcodesize); // flush icache, not required on x86-64 // but required on other platforms due // to lack of coherent dcache/icache.
// When you're done with your machine code you can release it: unsafe { jit_allocator.release(rx)?; } ```