#include <stdint.h>

uint8_t buff[10][100];

uint64_t addr(int buffer_index){
    return (uint64_t)&buff[buffer_index];
}

emcc project.c -Os -s WASM=1 -s SIDE_MODULE=1 -o project.wasm

<script>
var importObject = {
        env: {
            memoryBase: 0,
            tableBase: 0,
            setTempRet0:(x)=>{},
            memory: new WebAssembly.Memory({ initial:256 }),
            table: new WebAssembly.Table({ initial:0, element:'anyfunc' })
        }
    };

    fetch('http://localhost:9000/assets/wasm/project.wasm').then(
        response => response.arrayBuffer()
    ).then(
        bytes => WebAssembly.instantiate(bytes, importObject)
    ).then(
        results => {
            let module=results.instance
            let exports=module.exports
            let addr=exports._addr
            console.log(addr(0))
            console.log(addr(1))
            console.log(addr(2))
        }
    )
</script>

project.html:21 5242880
project.html:22 5242980
project.html:23 5243080