1 files changed, 58 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/wasm/memory64/memory-fill-shared.js b/js/src/jit-test/tests/wasm/memory64/memory-fill-shared.js
new file mode 100644
index 0000000000..cd81aeba4d
--- /dev/null
+++ b/js/src/jit-test/tests/wasm/memory64/memory-fill-shared.js
@@ -0,0 +1,58 @@
+// |jit-test| allow-oom; slow; skip-if: !canRunHugeMemoryTests()
+
+// This is just like memory-fill.js, but it is marked slow because the
+// C++-UB-safe operations we use for out-of-line fills on shared memory are slow
+// and the >4GB fill takes a long time.
+
+try {
+    var ins = new WebAssembly.Instance(new WebAssembly.Module(wasmTextToBinary(`
+(module
+  (memory (export "mem") i64 65537 65537 shared)
+  (func (export "f") (param $p i64) (param $c i32) (param $n i64)
+    (memory.fill (local.get $p) (local.get $c) (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);
+
+// Fill above 4GB
+doit(mem, 0x100000100, 37, 14);
+
+// Fill OOB above 4GB
+assertErrorMessage(() => ins.exports.f(0x10000FFFFn, 66, 14n),
+                   WebAssembly.RuntimeError,
+                   /out of bounds/);
+assertEq(mem[0x10000FFFF], 0);
+assertEq(mem[mem.length-1], 0);
+
+// Fill across 4GB
+doit(mem, 0x100000000 - 16, 42, 32);
+
+// Fill more than 4GB...
+ins.exports.f(0n, 86, 65536n*65537n);
+assertEq(mem[mem.length-1], 86);
+assertEq(mem[0], 86);
+
+// Fill OOB more than 4GB
+assertErrorMessage(() => ins.exports.f(1n, 75, 65536n*65537n),
+                   WebAssembly.RuntimeError,
+                   /out of bounds/);
+assertEq(mem[1], 86);
+assertEq(mem[mem.length-1], 86);
+
+function doit(mem, addr, c, n) {
+    assertEq(mem[addr-1], 0);
+    assertEq(mem[addr], 0);
+    assertEq(mem[addr + n - 1], 0);
+    assertEq(mem[addr + n], 0);
+    ins.exports.f(BigInt(addr), c, BigInt(n));
+    assertEq(mem[addr-1], 0);
+    assertEq(mem[addr], c);
+    assertEq(mem[addr + n - 1], c);
+    assertEq(mem[addr + n], 0);
+}
+