[wasm] fix alignment issue for WasmI64AtomicWait

WasmI64AtomicWait checked alignment at 32 bit instead of 64 bit.

Bug=v8:8075

Change-Id: Ibd668ad8440e928d14a1fcae1577c4aae345151b
Reviewed-on: https://chromium-review.googlesource.com/c/1475918Reviewed-by: Ben Smith <binji@chromium.org>
Commit-Queue: Aseem Garg <aseemgarg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59713}

src/compiler/wasm-compiler.cc

@@ -4295,7 +4295,7 @@ Node* WasmGraphBuilder::AtomicOp(wasm::WasmOpcode opcode, Node* const* inputs,
 
     case wasm::kExprI64AtomicWait: {
       Node* index = CheckBoundsAndAlignment(
-          wasm::ValueTypes::MemSize(MachineType::Uint32()), inputs[0], offset,
+          wasm::ValueTypes::MemSize(MachineType::Uint64()), inputs[0], offset,
           position);
       // Now that we've bounds-checked, compute the effective address.
       Node* address = graph()->NewNode(mcgraph()->machine()->Int32Add(),

test/mjsunit/wasm/futex.js

@@ -113,6 +113,42 @@ function WasmI64AtomicWait(memory, offset, index, val_low,
   });
 })();
 
+(function TestInvalidAlignment() {
+  let memory = new WebAssembly.Memory({initial: 1, maximum: 1, shared: true});
+
+  // Wait and wake must be 4 byte aligned.
+  [1, 2, 3].forEach(function(invalid) {
+    assertThrows(function() {
+      WasmAtomicWake(memory, invalid, 0, -1)
+    }, Error);
+    assertThrows(function() {
+      WasmAtomicWake(memory, 0, invalid, -1)
+    }, Error);
+    assertThrows(function() {
+      WasmI32AtomicWait(memory, invalid, 0, 0, -1)
+    }, Error);
+    assertThrows(function() {
+      WasmI32AtomicWait(memory, 0, invalid, 0, -1)
+    }, Error);
+    assertThrows(function() {
+      WasmI64AtomicWait(memory, invalid, 0, 0, 0, -1)
+    }, Error);
+    assertThrows(function() {
+      WasmI64AtomicWait(memory, 0, invalid, 0, 0, -1)
+    }, Error);
+  });
+
+  //WasmI64AtomicWait must be 8 byte aligned.
+  [4, 5, 6, 7].forEach(function(invalid) {
+    assertThrows(function() {
+      WasmI64AtomicWait(memory, 0, invalid, 0, 0, -1)
+    }, Error);
+    assertThrows(function() {
+      WasmI64AtomicWait(memory, invalid, 0, 0, 0, -1)
+    }, Error);
+  });
+})();
+
 (function TestI32WaitTimeout() {
   let memory = new WebAssembly.Memory({initial: 1, maximum: 1, shared: true});
   var waitMs = 100;