[wasm] asm.js - Check stdlib.NaN is valid, prepare for the rest.

src/runtime/runtime-compiler.cc

Index: src/runtime/runtime-compiler.cc
diff --git a/src/runtime/runtime-compiler.cc b/src/runtime/runtime-compiler.cc
index 9fe5d9c1ef7cacb80c58b1072edb1eec23068829..9885cdeae2ec5c98e94e66cb1ff194b8202192cd 100644
--- a/src/runtime/runtime-compiler.cc
+++ b/src/runtime/runtime-compiler.cc
@@ -93,7 +93,9 @@ RUNTIME_FUNCTION(Runtime_InstantiateAsmJs) {
   if (args[3]->IsJSArrayBuffer()) {
     memory = args.at<i::JSArrayBuffer>(3);
   }
-  if (args[1]->IsJSObject() && function->shared()->HasAsmWasmData()) {
+  if (args[1]->IsJSObject() && function->shared()->HasAsmWasmData() &&
+      AsmJs::IsStdlibValid(isolate, handle(function->shared()->asm_wasm_data()),
+                           args.at<JSObject>(1))) {

[titzer, 2016/08/19 10:00:28]

Does that need to be args.at<JSReceiver>?

[bradn, 2016/08/19 17:29:08]

Done.

     MaybeHandle<Object> result;
     result = AsmJs::InstantiateAsmWasm(
         isolate, handle(function->shared()->asm_wasm_data()), memory, foreign);