[wasm] Always provide a wasm instance object at runtime

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/wasm-run-utils.h"
 #include "test/common/wasm/test-signatures.h"
@@ skipping 70 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 and column are 1-based, so add 1 for the expected wasm output.
   ExceptionInfo expected_exceptions[] = {
-      {"<WASM UNNAMED>", static_cast<int>(wasm_index) + 1, 2},  // --
-      {"callFn", 1, 24}                                         // --
+      {"main", static_cast<int>(wasm_index) + 1, 2},  // --
+      {"callFn", 1, 24}                               // --
   };
   CheckExceptionInfos(maybe_exc.ToHandleChecked(), expected_exceptions);
 }
 
 // Trigger a trap for loading from out-of-bounds.
 TEST(IllegalLoad) {
   WasmRunner<void> r(kExecuteCompiled);
   TestSignatures sigs;
   // Set the execution context, such that a runtime error can be thrown.
   r.SetModuleContext();
 
   BUILD(r, WASM_IF(WASM_ONE, WASM_SEQ(WASM_LOAD_MEM(MachineType::Int32(),
                                                     WASM_I32V_1(-3)),
                                       WASM_DROP)));
   uint32_t wasm_index_1 = r.function()->func_index;
 
-  WasmFunctionCompiler& f2 = r.NewFunction<void>();
+  WasmFunctionCompiler& f2 = r.NewFunction<void>("call_main");
   // Insert a NOP such that the position of the call is not one.
   BUILD(f2, WASM_NOP, WASM_CALL_FUNCTION0(wasm_index_1));
   uint32_t wasm_index_2 = f2.function_index();
 
   Handle<JSFunction> js_wasm_wrapper = r.module().WrapCode(wasm_index_2);
 
   Handle<JSFunction> js_trampoline = Handle<JSFunction>::cast(
       v8::Utils::OpenHandle(*v8::Local<v8::Function>::Cast(
           CompileRun("(function callFn(fn) { fn(); })"))));
 
   Isolate* isolate = js_wasm_wrapper->GetIsolate();
   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());
 
   // Line and column are 1-based, so add 1 for the expected wasm output.
   ExceptionInfo expected_exceptions[] = {
-      {"<WASM UNNAMED>", static_cast<int>(wasm_index_1) + 1, 8},  // --
-      {"<WASM UNNAMED>", static_cast<int>(wasm_index_2) + 1, 3},  // --
-      {"callFn", 1, 24}                                           // --
+      {"main", static_cast<int>(wasm_index_1) + 1, 8},       // --
+      {"call_main", static_cast<int>(wasm_index_2) + 1, 3},  // --
+      {"callFn", 1, 24}                                      // --
   };
   CheckExceptionInfos(maybe_exc.ToHandleChecked(), expected_exceptions);
 }