[wasm] Enable wasm frame inspection for debugging

src/wasm/wasm-module.cc

 // Copyright 2015 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/base/atomic-utils.h"
 #include "src/macro-assembler.h"
 #include "src/objects.h"
 #include "src/property-descriptor.h"
 #include "src/v8.h"
 
@@ skipping 1008 matching lines @@
 }
 
 WasmDebugInfo* GetDebugInfo(JSObject* wasm) {
   Object* info = wasm->GetInternalField(kWasmDebugInfo);
   if (!info->IsUndefined(wasm->GetIsolate())) return WasmDebugInfo::cast(info);
   Handle<WasmDebugInfo> new_info = WasmDebugInfo::New(handle(wasm));
   wasm->SetInternalField(kWasmDebugInfo, *new_info);
   return *new_info;
 }
 
+int GetNumberOfFunctions(JSObject* wasm) {
+  Object* func_names_obj = wasm->GetInternalField(kWasmFunctionNamesArray);
+  // TODO(clemensh): this looks inside an array constructed elsewhere. Refactor.
+  return ByteArray::cast(func_names_obj)->get_int(0);
+}
+
 namespace testing {
 
 int32_t CompileAndRunWasmModule(Isolate* isolate, const byte* module_start,
                                 const byte* module_end, bool asm_js) {
   HandleScope scope(isolate);
   Zone zone(isolate->allocator());
   ErrorThrower thrower(isolate, "CompileAndRunWasmModule");
 
   // Decode the module, but don't verify function bodies, since we'll
   // be compiling them anyway.
@@ skipping 51 matching lines @@
     return static_cast<int32_t>(HeapNumber::cast(*result)->value());
   }
   thrower.Error("WASM.compileRun() failed: Return value should be number");
   return -1;
 }
 
 }  // namespace testing
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8