[wasm] Store function names in the wasm object

src/compiler/wasm-compiler.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/compiler/wasm-compiler.h"
 
 #include "src/isolate-inl.h"
 
 #include "src/base/platform/elapsed-timer.h"
 #include "src/base/platform/platform.h"
@@ skipping 2959 matching lines @@
   CompilationInfo info(func_name, isolate, jsgraph->graph()->zone(), flags);
   base::SmartPointer<CompilationJob> job(Pipeline::NewWasmCompilationJob(
       &info, jsgraph->graph(), descriptor, source_positions));
   Handle<Code> code = Handle<Code>::null();
   if (job->OptimizeGraph() == CompilationJob::SUCCEEDED &&
       job->GenerateCode() == CompilationJob::SUCCEEDED) {
     code = info.code();
   }
 
   buffer.Dispose();
+
   if (!code.is_null()) {
+    DCHECK(code->deoptimization_data() == nullptr ||
+           code->deoptimization_data()->length() == 0);
+    Handle<FixedArray> deopt_data =
+        isolate->factory()->NewFixedArray(2, TENURED);
+    if (!module_env->instance->js_object.is_null()) {
+      deopt_data->set(0, *module_env->instance->js_object);
+      deopt_data->set(1, Smi::FromInt(function->func_index));
+    } else if (func_name.start() != nullptr) {
+      MaybeHandle<String> maybe_name =
+          isolate->factory()->NewStringFromUtf8(func_name);
+      if (!maybe_name.is_null())
+        deopt_data->set(0, *maybe_name.ToHandleChecked());
+    }
+    deopt_data->set_length(2);
+    code->set_deoptimization_data(*deopt_data);
+
     RecordFunctionCompilation(
         Logger::FUNCTION_TAG, &info, "WASM_function", function->func_index,
         module_env->module->GetName(function->name_offset,
                                     function->name_length));
   }
 
   if (FLAG_trace_wasm_decode_time) {
     double compile_ms = compile_timer.Elapsed().InMillisecondsF();
     PrintF(
         "wasm-compile ok: %d bytes, %0.3f ms decode, %d nodes, %0.3f ms "
@@ skipping 49 matching lines @@
 
 Handle<Code> FinishCompilation(WasmCompilationUnit* unit) {
   Handle<Code> result = unit->FinishCompilation();
   delete unit;
   return result;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8