[wasm] Check the input of grow-memory before calling the runtime.

test/mjsunit/wasm/grow-memory.js

Index: test/mjsunit/wasm/grow-memory.js
diff --git a/test/mjsunit/wasm/grow-memory.js b/test/mjsunit/wasm/grow-memory.js
index 27aca22d1a68060dc3ea95371046cbe5be9cbf4f..dd0bdc31a55cc7d097b38876fcf8706dd76dc729 100644
--- a/test/mjsunit/wasm/grow-memory.js
+++ b/test/mjsunit/wasm/grow-memory.js
@@ -117,3 +117,12 @@ function testGrowMemoryTrapMaxPages() {
 }
 
 testGrowMemoryTrapMaxPages();
+
+(function testGrowMemoryTrapsWithNonSmiInput() {
+  var builder = genGrowMemoryBuilder();
+  var module = builder.instantiate();
+  function growMem(pages) { return module.exports.grow_memory(pages); }
+  // The parameter of grow_memory is unsigned. Therefore -1 stands for
+  // UINT32_MIN, which cannot be represented as SMI.
+  assertEquals(-1, growMem(-1));
+})();

[gdeepti, 2016/08/30 02:19:56]

Nit: Test not consistent with the format of other tests in this file. Fix to be
consistent? 

[ahaas, 2016/08/30 06:49:53]

You are right, it should be consistent.

Done.