1 files changed, 45 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/wasm/memory64/memory-init.js b/js/src/jit-test/tests/wasm/memory64/memory-init.js
new file mode 100644
index 0000000000..246fc3f2d4
--- /dev/null
+++ b/js/src/jit-test/tests/wasm/memory64/memory-init.js
@@ -0,0 +1,45 @@
+// |jit-test| allow-oom; skip-if: !canRunHugeMemoryTests()
+
+var S = (function () {
+    let s = "";
+    for ( let i=0; i < 16; i++ )
+        s += "0123456789abcdef"
+    return s;
+})();
+
+for (let shared of ['', 'shared']) {
+    try {
+        var ins = new WebAssembly.Instance(new WebAssembly.Module(wasmTextToBinary(`
+(module
+  (memory (export "mem") i64 65537 65537 ${shared})
+  (data $d "${S}")
+  (func (export "f") (param $p i64) (param $o i32) (param $n i32)
+    (memory.init $d (local.get $p) (local.get $o) (local.get $n))))`)));
+    } catch (e) {
+        if (e instanceof WebAssembly.RuntimeError && String(e).match(/too many memory pages/)) {
+            quit(0);
+        }
+        throw e;
+    }
+
+    var mem = new Uint8Array(ins.exports.mem.buffer);
+
+    // Init above 4GB
+    doit(mem, 0x1_0000_1000, 1, S.length-1);
+
+    // Init above 4GB with OOM
+    assertErrorMessage(() => ins.exports.f(0x1_0000_ff80n, 0, 256),
+                       WebAssembly.RuntimeError,
+                       /out of bounds/);
+
+    // Init across 4GB
+    doit(mem, 0xffff_ff80, 3, 200);
+}
+
+function doit(mem, addr, offs, n) {
+    ins.exports.f(BigInt(addr), offs, n);
+    for (let i=0; i < n; i++) {
+        assertEq(mem[addr+i], S.charCodeAt(offs+i));
+    }
+}
+