[wasm] Differentiate unnamed and empty names

src/frames.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/frames.h"
 
 #include <sstream>
 
 #include "src/ast/ast.h"
 #include "src/ast/scopeinfo.h"
 #include "src/base/bits.h"
 #include "src/deoptimizer.h"
 #include "src/frames-inl.h"
 #include "src/full-codegen/full-codegen.h"
 #include "src/register-configuration.h"
 #include "src/safepoint-table.h"
 #include "src/string-stream.h"
 #include "src/vm-state-inl.h"
-#include "src/wasm/wasm-module.h"
 
 namespace v8 {
 namespace internal {
 
 ReturnAddressLocationResolver
     StackFrame::return_address_location_resolver_ = NULL;
 
 
 // Iterator that supports traversing the stack handlers of a
 // particular frame. Needs to know the top of the handler chain.
@@ skipping 1318 matching lines @@
   Object* func_index_obj = deopt_data->get(1);
   if (func_index_obj->IsUndefined()) return static_cast<uint32_t>(-1);
   if (func_index_obj->IsSmi()) return Smi::cast(func_index_obj)->value();
   DCHECK(func_index_obj->IsHeapNumber());
   uint32_t val = static_cast<uint32_t>(-1);
   func_index_obj->ToUint32(&val);
   DCHECK(val != static_cast<uint32_t>(-1));
   return val;
 }
 
-Object* WasmFrame::function_name() {
-  Object* wasm_object = wasm_obj();
-  if (wasm_object->IsUndefined()) return wasm_object;
-  Handle<JSObject> wasm = handle(JSObject::cast(wasm_object));
-  return *wasm::GetWasmFunctionName(wasm, function_index());
-}
-
 namespace {
 
 
 void PrintFunctionSource(StringStream* accumulator, SharedFunctionInfo* shared,
                          Code* code) {
   if (FLAG_max_stack_trace_source_length != 0 && code != NULL) {
     std::ostringstream os;
     os << "--------- s o u r c e   c o d e ---------\n"
        << SourceCodeOf(shared, FLAG_max_stack_trace_source_length)
        << "\n-----------------------------------------\n";
@@ skipping 417 matching lines @@
   for (StackFrameIterator it(isolate); !it.done(); it.Advance()) {
     StackFrame* frame = AllocateFrameCopy(it.frame(), zone);
     list.Add(frame, zone);
   }
   return list.ToVector();
 }
 
 
 }  // namespace internal
 }  // namespace v8