[wasm] Make wasm info available on the stack trace

src/compiler/wasm-compiler.cc

Index: src/compiler/wasm-compiler.cc
diff --git a/src/compiler/wasm-compiler.cc b/src/compiler/wasm-compiler.cc
index 3e4a2a77864e7e8431159a3ea53067b1e8249689..15dab06f6958aa071e642591be68f85d8b0e5265 100644
--- a/src/compiler/wasm-compiler.cc
+++ b/src/compiler/wasm-compiler.cc
@@ -3051,13 +3051,16 @@ class WasmCompilationUnit {
         isolate_->factory()->NewFixedArray(2, TENURED);
     if (!module_env_->instance->js_object.is_null()) {
       deopt_data->set(0, *module_env_->instance->js_object);
-      deopt_data->set(1, Smi::FromInt(function_->func_index));
-    } else if (info_.GetDebugName().get() != nullptr) {
-      MaybeHandle<String> maybe_name = isolate_->factory()->NewStringFromUtf8(
-          CStrVector(info_.GetDebugName().get()));
+    } else {
+      base::SmartArrayPointer<char> debug_name = info_.GetDebugName();
+      MaybeHandle<String> maybe_name;
+      if (debug_name.get() != nullptr)
+        maybe_name = isolate_->factory()->NewStringFromUtf8(

[Yang, 2016/05/03 18:59:07]

Can we have brackets around if-body here and below?

[Clemens Hammacher, 2016/05/04 09:06:19]

It turned out the first if is even redundant, so I removed it. But I added
brackets around the one below.

+            CStrVector(debug_name.get()));
       if (!maybe_name.is_null())
         deopt_data->set(0, *maybe_name.ToHandleChecked());
     }
+    deopt_data->set(1, Smi::FromInt(function_->func_index));
     deopt_data->set_length(2);
     code->set_deoptimization_data(*deopt_data);