Memory incoherence when using --path #2888

amoffat · 2024-11-23T02:08:06Z

Bug description

If asc is used to compile multiple files, and one of those files is resolved via --path, then memory set in that file is not persisted. If --path is not used, the memory persists.

Steps to reproduce

index.html

<!DOCTYPE html>
<html>
  <body>
    <script type="module">
      import { printThing, adjustThing } from "./main.js";
      printThing();
      adjustThing();
      printThing();
    </script>
  </body>
</html>

main.ts

import { thing } from "./lib/utils/module";

export function printThing(): void {
  console.log(`Thing value is ${thing.value}`);
}

lib/utils/types.ts

export class Thing {
  value: i32 = 0;
}

lib/utils/module.ts

import { Thing } from "./types";

export const thing = new Thing();
thing.value = 123;

export function adjustThing(): void {
  thing.value = 456;
}

Compile with
asc main.ts lib/utils/module.ts -o main.wasm --bindings esm --path lib

Run npx http-server

Open http://localhost:8080 and open the debug console.

The output should be:

Thing value is 123
Thing value is 123

This shows that the memory is not being set correctly.

Now to prove it is a --path issue, we will use relative imports, instead of path imports. Change main.ts to:

import { thing } from ".lib/utils/module";

export function printThing(): void {
  console.log(`Thing value is ${thing.value}`);
}

Compile with
asc main.ts lib/utils/module.ts -o main.wasm --bindings esm

Visit in the browser (you may need to hard refresh). The output will be

Thing value is 123
Thing value is 456

This shows that the memory is being set correctly.

AssemblyScript version

0.27.31

The text was updated successfully, but these errors were encountered:

amoffat · 2024-11-23T03:46:03Z

Some more context:

I am trying to build a library that exposes some standard functions to the javascript host. However, because the functions exported in the library cannot manipulate any state that the main program has access to, they aren't useful.

amoffat added the bug label Nov 23, 2024

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Memory incoherence when using --path #2888

Memory incoherence when using --path #2888

amoffat commented Nov 23, 2024

amoffat commented Nov 23, 2024

Memory incoherence when using --path #2888

Memory incoherence when using --path #2888

Comments

amoffat commented Nov 23, 2024

Bug description

Steps to reproduce

AssemblyScript version

amoffat commented Nov 23, 2024