feat(core): enable wasm threading support (#10116)

4 files changed, 13 insertions, 1 deletions

diff --git a/cli/dts/lib.deno.shared_globals.d.ts b/cli/dts/lib.deno.shared_globals.d.ts
index e3fd2bf60..a2609be85 100644
--- a/cli/dts/lib.deno.shared_globals.d.ts
+++ b/cli/dts/lib.deno.shared_globals.d.ts
@@ -89,7 +89,7 @@ declare namespace WebAssembly {
     constructor(descriptor: MemoryDescriptor);
 
     /** An accessor property that returns the buffer contained in the memory. */
-    readonly buffer: ArrayBuffer;
+    readonly buffer: ArrayBuffer | SharedArrayBuffer;
 
     /**
      * Increases the size of the memory instance by a specified number of WebAssembly
@@ -170,6 +170,7 @@ declare namespace WebAssembly {
   export interface MemoryDescriptor {
     initial: number;
     maximum?: number;
+    shared?: boolean;
   }
 
   /** A `ModuleExportDescriptor` is the description of a declared export in a `WebAssembly.Module`. */
diff --git a/cli/tests/integration_tests.rs b/cli/tests/integration_tests.rs
index 50c70213a..92deb9416 100644
--- a/cli/tests/integration_tests.rs
+++ b/cli/tests/integration_tests.rs
@@ -3446,6 +3446,11 @@ console.log("finish");
     output: "wasm.ts.out",
   });
 
+  itest!(wasm_shared {
+    args: "run --quiet wasm_shared.ts",
+    output: "wasm_shared.out",
+  });
+
   itest!(wasm_async {
     args: "run wasm_async.js",
     output: "wasm_async.out",
diff --git a/cli/tests/wasm_shared.out b/cli/tests/wasm_shared.out
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/cli/tests/wasm_shared.out
diff --git a/cli/tests/wasm_shared.ts b/cli/tests/wasm_shared.ts
new file mode 100644
index 000000000..b713385d5
--- /dev/null
+++ b/cli/tests/wasm_shared.ts
@@ -0,0 +1,6 @@
+const memory = new WebAssembly.Memory({
+  initial: 1,
+  maximum: 10,
+  shared: true,
+});
+console.assert(memory.buffer instanceof SharedArrayBuffer);