[wasm] Differentiate unnamed and empty names

test/cctest/wasm/test-wasm-trap-position.cc

 // Copyright 2016 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/wasm/wasm-macro-gen.h"
 
 #include "test/cctest/cctest.h"
 #include "test/cctest/compiler/value-helper.h"
 #include "test/cctest/wasm/test-signatures.h"
 #include "test/cctest/wasm/wasm-run-utils.h"
@@ skipping 71 matching lines @@
   isolate->SetCaptureStackTraceForUncaughtExceptions(true, 10,
                                                      v8::StackTrace::kOverview);
   Handle<Object> global(isolate->context()->global_object(), isolate);
   MaybeHandle<Object> maybe_exc;
   Handle<Object> args[] = {js_wasm_wrapper};
   MaybeHandle<Object> returnObjMaybe =
       Execution::TryCall(isolate, js_trampoline, global, 1, args, &maybe_exc);
   CHECK(returnObjMaybe.is_null());
 
   ExceptionInfo expected_exceptions[] = {
-      {"<WASM>", static_cast<int>(wasm_index), 1},  // --
-      {"callFn", 1, 24}                             // --
+      {"<WASM UNNAMED>", static_cast<int>(wasm_index), 1},  // --
+      {"callFn", 1, 24}                                     // --
   };
   CheckExceptionInfos(isolate, maybe_exc.ToHandleChecked(),
                       expected_exceptions);
 }
 
 // Trigger a trap for loading from out-of-bounds.
 TEST(IllegalLoad) {
   TestSignatures sigs;
   TestingModule module;
 
@@ skipping 20 matching lines @@
                                                      v8::StackTrace::kOverview);
   Handle<Object> global(isolate->context()->global_object(), isolate);
   MaybeHandle<Object> maybe_exc;
   Handle<Object> args[] = {js_wasm_wrapper};
   MaybeHandle<Object> returnObjMaybe =
       Execution::TryCall(isolate, js_trampoline, global, 1, args, &maybe_exc);
   CHECK(returnObjMaybe.is_null());
 
   // Line number is 1-based, with 0 == kNoLineNumberInfo.
   ExceptionInfo expected_exceptions[] = {
-      {"<WASM>", static_cast<int>(wasm_index), 6},    // --
-      {"<WASM>", static_cast<int>(wasm_index_2), 2},  // --
-      {"callFn", 1, 24}                               // --
+      {"<WASM UNNAMED>", static_cast<int>(wasm_index), 6},    // --
+      {"<WASM UNNAMED>", static_cast<int>(wasm_index_2), 2},  // --
+      {"callFn", 1, 24}                                       // --
   };
   CheckExceptionInfos(isolate, maybe_exc.ToHandleChecked(),
                       expected_exceptions);
 }