wasm-builtin-not-visible.js

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// |jit-test| skip-if: !wasmDebuggingEnabled() || !('Function' in WebAssembly)

// Builtin/self-hosted wasm modules (e.g. from WebAssembly.Function) should

// not be visible via the Debugger API.

var g = newGlobal({newCompartment: true});

var dbg = new Debugger(g);

var newScriptCount = 0;

dbg.onNewScript = function(s) {

  if (s.format === "wasm") {

    newScriptCount++;

};

// Instantiate a regular user wasm module. Store in a global to prevent GC.

g.eval(`

  var inst = new WebAssembly.Instance(new WebAssembly.Module(wasmTextToBinary(

    '(module (func (export "f") (result i32) i32.const 42))'

  )));

`);

assertEq(newScriptCount, 1, "regular wasm instance should fire onNewScript");

// WebAssembly.Function creates an internal wasm module and should NOT fire onNewScript.

g.eval(`new WebAssembly.Function({parameters: ["i32"], results: ["i32"]}, x => x + 1);`);

assertEq(newScriptCount, 1, "WebAssembly.Function internal module should not fire onNewScript");

// findScripts should also not expose the internal module.

var wasmScripts = dbg.findScripts().filter(s => s.format === "wasm");

assertEq(wasmScripts.length, 1, "findScripts should only return the regular wasm module");