[wasm] Differentiate unnamed and empty names

src/isolate.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/isolate.h"
 
 #include <stdlib.h>
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
@@ skipping 21 matching lines @@
 #include "src/profiler/cpu-profiler.h"
 #include "src/profiler/sampler.h"
 #include "src/prototype.h"
 #include "src/regexp/regexp-stack.h"
 #include "src/runtime-profiler.h"
 #include "src/simulator.h"
 #include "src/snapshot/deserializer.h"
 #include "src/v8.h"
 #include "src/version.h"
 #include "src/vm-state-inl.h"
-
+#include "src/wasm/wasm-module.h"
 
 namespace v8 {
 namespace internal {
 
 base::Atomic32 ThreadId::highest_thread_id_ = 0;
 
 int ThreadId::AllocateThreadId() {
   int new_id = base::NoBarrier_AtomicIncrement(&highest_thread_id_, 1);
   return new_id;
 }
@@ skipping 556 matching lines @@
                             NONE);
     }
     return stack_frame;
   }
 
   Handle<JSObject> NewStackFrameObject(WasmFrame* frame) {
     Handle<JSObject> stack_frame =
         factory()->NewJSObject(isolate_->object_function());
 
     if (!function_key_.is_null()) {
-      Handle<Object> fun_name = handle(frame->function_name(), isolate_);
-      if (fun_name->IsUndefined())
-        fun_name = isolate_->factory()->InternalizeUtf8String(
-            Vector<const char>("<WASM>"));
-      JSObject::AddProperty(stack_frame, function_key_, fun_name, NONE);
+      Object* wasm_object = frame->wasm_obj();
+      Handle<String> name;
+      if (!wasm_object->IsUndefined()) {
+        Handle<JSObject> wasm = handle(JSObject::cast(wasm_object));
+        wasm::GetWasmFunctionName(wasm, frame->function_index())
+            .ToHandle(&name);
+      }
+      if (name.is_null()) {
+        name = isolate_->factory()->NewStringFromStaticChars("<WASM UNNAMED>");
+      }
+      JSObject::AddProperty(stack_frame, function_key_, name, NONE);
     }
     // Encode the function index as line number.
     if (!line_key_.is_null()) {
       JSObject::AddProperty(
           stack_frame, line_key_,
           isolate_->factory()->NewNumberFromInt(frame->function_index()), NONE);
     }
     // Encode the byte offset as column.
     if (!column_key_.is_null()) {
       Code* code = frame->LookupCode();
@@ skipping 2428 matching lines @@
   // Then check whether this scope intercepts.
   if ((flag & intercept_mask_)) {
     intercepted_flags_ |= flag;
     return true;
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace v8