[wasm] Make sure the interpreter only executes preprocessed code.

src/wasm/wasm-interpreter.cc

Index: src/wasm/wasm-interpreter.cc
diff --git a/src/wasm/wasm-interpreter.cc b/src/wasm/wasm-interpreter.cc
index 164da8dfe509939b4e3716797b09e79342614375..25265fa314d5739179a888361e757aea11c1fdc6 100644
--- a/src/wasm/wasm-interpreter.cc
+++ b/src/wasm/wasm-interpreter.cc
@@ -1036,7 +1036,8 @@ class ThreadImpl : public WasmInterpreter::Thread {
       if (state_ == WasmInterpreter::STOPPED ||
           state_ == WasmInterpreter::PAUSED) {
         state_ = WasmInterpreter::RUNNING;
-        Execute(frames_.back().code, frames_.back().ret_pc, kRunSteps);
+        Execute(codemap()->Preprocess(frames_.back().code),

[titzer, 2016/09/22 14:18:24]

Maybe PushFrame should do this?

[ahaas, 2016/09/22 14:40:37]

I moved Preprocess to FindCode in the CodeMap. I think that's an even better
place than PushFrame, and PushFrame uses FindCode.

+                frames_.back().ret_pc, kRunSteps);
       }
     } while (state_ == WasmInterpreter::STOPPED);
     return state_;