WebAssembly Memory

Introduction to Memory

WebAssembly memory is a linear, contiguous block of memory that can be accessed and manipulated by WebAssembly code. It's a crucial aspect of WebAssembly that allows for efficient and safe memory management.

Memory Management

WebAssembly memory can be declared and grown using specific instructions. The `memory` section in a WebAssembly module defines the initial and maximum size of the memory.

// Example of declaring memory in a WebAssembly module (in Wat format)
(module
 (memory $01) ;; Declare1 page (64KB) of memory
 (export "memory" (memory $0))
)

Interacting with Memory

WebAssembly provides various instructions to load and store data in memory. These instructions allow for efficient data manipulation.

// Example of storing and loading data in WebAssembly memory
(module
 (func $store_data
 (i32.store (i32.const0) (i32.const42)) ;; Store42 at memory address0
 )
 (func $load_data (result i32)
 (i32.load (i32.const0)) ;; Load data from memory address0
 )
)

Interactive Memory Example