dom/webgpu/crashtests/1809567.html

   1 <!DOCTYPE html>
   2 <html class="reftest-wait">
   3   <body>
   4     <script>
   5       // The bulk of the test is wrapped in an async function because
   6       // the WebGPU API returns promises of adapters and devices,
   7       // which we would like to conveniently await.
   8       async function orphan_webgpu_device() {
   9           // Create an iframe in the same origin as this code.
  10           let iframe = document.createElement('iframe');
  11           document.body.appendChild(iframe);
  12
  13           // Define a function in that iframe that creates a WebGPU
  14           // `GPUDevice`.
  15           let script = iframe.contentDocument.createElement('script');
  16           script.type = 'text/javascript';
  17           script.text = `
  18               async function create_device() {
  19                   // WebGPU is not yet available in beta or release.
  20                   if (!navigator.gpu) {
  21                       return null;
  22                   }
  23
  24                   let adapter = await navigator.gpu.requestAdapter({ });
  25                   // Not all GPUs are capable of supporting WebGPU.
  26                   if (!adapter) {
  27                       return null;
  28                   }
  29
  30                   return await adapter.requestDevice({ });
  31               }
  32           `;
  33           iframe.contentDocument.body.appendChild(script);
  34
  35           // Call that function to create a `GPUDevice` in the iframe.
  36           let device = await iframe.contentWindow.create_device();
  37
  38           // If we can't run WebGPU in this browser, then we can't reach the crash.
  39           if (device) {
  40               // Remove the iframe from our document. This closes its window.
  41               iframe.remove();
  42
  43               try {
  44                   // When a Web API JavaScript object has had its parent window
  45                   // closed, C++ implementations of its WebIDL methods become unable
  46                   // to create JavaScript objects as usual: calling
  47                   // `EventTarget::GetParentObject` returns `nullptr`.
  48                   //
  49                   // Since we removed `iframe` from this document, the following
  50                   // call will fail trying to create a `Promise` of the module's
  51                   // `GPUCompilationInfo`.
  52                   device.createShaderModule({ code: '' });
  53               } catch (error) {
  54                   // Eating errors indiscriminately wastes later developers' time.
  55                   if (error.name != "NS_ERROR_UNEXPECTED") {
  56                       throw error;
  57                   }
  58               }
  59           }
  60       }
  61
  62       orphan_webgpu_device()
  63           .catch((error) => {
  64               console.log(error);
  65           })
  66           .finally(() => {
  67               // End the crashtest.
  68               document.documentElement.removeAttribute("class");
  69           });
  70     </script>
  71   </body>
  72 </html>