[wasm] Store function names in the wasm object

test/cctest/wasm/wasm-run-utils.h

 // 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.
 
 #ifndef WASM_RUN_UTILS_H
 #define WASM_RUN_UTILS_H
 
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 469 matching lines @@
   Handle<Code> Compile() {
     InitializeDescriptor();
     CallDescriptor* desc = descriptor_;
     if (kPointerSize == 4) {
       desc = testing_module_->GetI32WasmCallDescriptor(this->zone(), desc);
     }
     CompilationInfo info(debug_name_, this->isolate(), this->zone(),
                          Code::ComputeFlags(Code::WASM_FUNCTION));
     v8::base::SmartPointer<CompilationJob> job(Pipeline::NewWasmCompilationJob(
         &info, graph(), desc, &source_position_table_));
-    Handle<Code> code = Handle<Code>::null();
-    if (job->OptimizeGraph() == CompilationJob::SUCCEEDED &&
-        job->GenerateCode() == CompilationJob::SUCCEEDED) {
-      code = info.code();
+    if (job->OptimizeGraph() != CompilationJob::SUCCEEDED ||
+        job->GenerateCode() != CompilationJob::SUCCEEDED)
+      return Handle<Code>::null();
+
+    Handle<Code> code = info.code();
+
+    // Length is always 2, since usually <wasm_obj, func_index> is stored in the
+    // deopt data. Here, we store <func_name, undef> instead.
+    DCHECK(code->deoptimization_data() == nullptr ||
+           code->deoptimization_data()->length() == 0);
+    Handle<FixedArray> deopt_data =
+        isolate()->factory()->NewFixedArray(2, TENURED);
+    if (debug_name_.start() != nullptr) {
+      MaybeHandle<String> maybe_name =
+          isolate()->factory()->NewStringFromUtf8(debug_name_, TENURED);
+      if (!maybe_name.is_null())
+        deopt_data->set(0, *maybe_name.ToHandleChecked());
     }
+    deopt_data->set_length(2);
+    code->set_deoptimization_data(*deopt_data);
+
 #ifdef ENABLE_DISASSEMBLER
-    if (!code.is_null() && FLAG_print_opt_code) {
+    if (FLAG_print_opt_code) {
       OFStream os(stdout);
       code->Disassemble("wasm code", os);
     }
 #endif
 
     return code;
   }
 
   uint32_t CompileAndAdd(uint16_t sig_index = 0) {
     CHECK(testing_module_);
@@ skipping 135 matching lines @@
     if (p1 == MachineType::None()) return 1;
     if (p2 == MachineType::None()) return 2;
     if (p3 == MachineType::None()) return 3;
     return 4;
   }
 };
 
 }  // namespace
 
 #endif