[wasm] Small memory size crashes.

test/mjsunit/wasm/module-memory.js

Index: test/mjsunit/wasm/module-memory.js
diff --git a/test/mjsunit/wasm/module-memory.js b/test/mjsunit/wasm/module-memory.js
index 6707f0816410c0667e3711b78936226b2e0cf2be..b1f55f0b69fa4b60778c333c8b95cd869d49d5aa 100644
--- a/test/mjsunit/wasm/module-memory.js
+++ b/test/mjsunit/wasm/module-memory.js
@@ -42,6 +42,18 @@ function genModule(memory) {
   return module;
 }
 
+
+function testSmallMemory() {
+  var buffer = new ArrayBuffer(1);

[gdeepti, 2016/10/07 02:50:52]

Following up from offline discussions, this test should not pass because the 
 - Memory is not aligned to page size. 
 - Imported memory should be in the form of WebAssembly.Memory object

I will follow up to add checks in Instantiate/GrowMemory/MemorySize methods for
the memory to be aligned to page size. 

+  var module = genModule(buffer);
+  var main = module.exports.main;
+  assertEquals(1, buffer.byteLength);
+  assertEquals(0, main(0));
+}
+
+testSmallMemory();
+
+
 function testPokeMemory() {
   var module = genModule(null);
   var buffer = module.exports.memory.buffer;