[wasm] Refactor function name table and lookup

src/wasm/wasm-module.h

 // 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.
 
 #ifndef V8_WASM_MODULE_H_
 #define V8_WASM_MODULE_H_
 
+#include "src/api.h"
+#include "src/handles.h"
 #include "src/wasm/wasm-opcodes.h"
 #include "src/wasm/wasm-result.h"
 
-#include "src/api.h"
-#include "src/handles.h"
-
 namespace v8 {
 namespace internal {
 
 namespace compiler {
 class CallDescriptor;
 class WasmCompilationUnit;
 }
 
 namespace wasm {
 const size_t kMaxModuleSize = 1024 * 1024 * 1024;
@@ skipping 288 matching lines @@
 // For testing. Decode, verify, and run the last exported function in the
 // given encoded module.
 int32_t CompileAndRunWasmModule(Isolate* isolate, const byte* module_start,
                                 const byte* module_end, bool asm_js = false);
 
 // For testing. Decode, verify, and run the last exported function in the
 // given decoded module.
 int32_t CompileAndRunWasmModule(Isolate* isolate, const WasmModule* module);
 
 // Extract a function name from the given wasm object.
+// Returns "<WASM UNNAMED>" if the function is unnamed or the name is not a
+// valid UTF-8 string.
+Handle<String> GetWasmFunctionName(Isolate* isolate, Handle<Object> wasm,
+                                   uint32_t func_index);
+
+// Extract a function name from the given wasm object.
 // Returns a null handle if the function is unnamed or the name is not a valid
 // UTF-8 string.
-MaybeHandle<String> GetWasmFunctionName(Handle<JSObject> wasm,
-                                        uint32_t func_index);
+Handle<Object> GetWasmFunctionNameOrNull(Isolate* isolate, Handle<Object> wasm,
+                                         uint32_t func_index);
 
 // Check whether the given object is a wasm object.
 // This checks the number and type of internal fields, so it's not 100 percent
 // secure. If it turns out that we need more complete checks, we could add a
 // special marker as internal field, which will definitely never occur anywhere
 // else.
 bool IsWasmObject(Handle<JSObject> object);
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_MODULE_H_