native-trampoline-3.js

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// |jit-test| skip-if: !wasmIsSupported()

// Use a Wasm module to get the following stack frames:

//

//  .. => array sort trampoline => wasmfunc comparator (Wasm) => comparator (JS)

let binary = wasmTextToBinary(`

(module

  (import "" "comparator" (func $comparator (param i32) (param i32) (result i32)))

  (func $wasmfunc

    (export "wasmfunc")

    (param $x i32)

    (param $y i32)

    (result i32)

    (return (call $comparator (local.get $x) (local.get $y)))

)`);

let mod = new WebAssembly.Module(binary);

let instance = new WebAssembly.Instance(mod, {"": {comparator}});

function comparator(x, y) {

  readGeckoProfilingStack();

  return y - x;

enableGeckoProfilingWithSlowAssertions();

for (let i = 0; i < 20; i++) {

  let arr = [3, 1, 2, -1, 0, 4];

  arr.sort(instance.exports.wasmfunc);

  assertEq(arr.toString(), "4,3,2,1,0,-1");