bug1645310.js - mozsearch

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// |jit-test| --wasm-compiler=optimizing; skip-if: !wasmIsSupported()

// In this case we're setting things up so that wasm can't be compiled, as the

// only available compiler is Ion, and enabling the Debugger will disable Ion.

//

// The test tests that the lazy creation of the WebAssembly object is not

// dependent on whether WebAssembly can be compiled or not: if wasm is supported

// then the WebAssembly object should always be created.  The fact that wasm

// can't be compiled is a separate matter.

//

// IT'S IMPORTANT NOT TO MENTION THE WEBASSEMBLY OBJECT UNTIL AFTER THE DEBUGGER

// HAS BEEN CREATED, AND NOT TO LOAD lib/wasm.js OR OTHER WASM CODE HERE.

var g7 = newGlobal({newCompartment: true});

g7.parent = this;

g7.eval("var dbg = Debugger(parent)");

assertEq(typeof WebAssembly, "object");

// Test that validation works even if compilers are not available.

WebAssembly.validate(wasmTextToBinary('(module (func))'));

// Test that compilation fails with a sensible error.

var bits = wasmTextToBinary('(module (func))');

var msg = /no WebAssembly compiler available/

var exn;

exn = null;

try { new WebAssembly.Module(bits); } catch (e) { exn = e; }

assertEq(Boolean(exn), true);

assertEq(Boolean(String(exn).match(msg)), true);

exn = null;

try { WebAssembly.compile(bits); } catch (e) { exn = e; }

assertEq(Boolean(exn), true);

assertEq(Boolean(String(exn).match(msg)), true);

exn = null;

try { WebAssembly.instantiate(bits); } catch (e) { exn = e; }

assertEq(Boolean(exn), true);

assertEq(Boolean(String(exn).match(msg)), true);

// We do not use wasmStreamingEnabled() here because that checks whether

// compilers are available, and that is precisely what we want to be checking

// ourselves.  But streaming compilation is available only if there are helper

// threads, so that's an OK proxy.

if (helperThreadCount() > 0) {

    exn = null;

    WebAssembly.compileStreaming(bits).catch(e => { exn = e; });

    drainJobQueue();

    assertEq(Boolean(exn), true);

    assertEq(Boolean(String(exn).match(msg)), true);

    exn = null;

    WebAssembly.instantiateStreaming(bits).catch(e => { exn = e; });

    drainJobQueue();

    assertEq(Boolean(exn), true);

    assertEq(Boolean(String(exn).match(msg)), true);