Initial support for emitting unwinding information in perf jitdump.

src/wasm/wasm-module.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/base/atomic-utils.h"
 #include "src/macro-assembler.h"
 #include "src/objects.h"
 #include "src/property-descriptor.h"
 #include "src/v8.h"
 
@@ skipping 243 matching lines @@
   }
   return true;
 }
 
 Handle<Code> CreatePlaceholder(Factory* factory, uint32_t index,
                                Code::Kind kind) {
   // Create a placeholder code object and encode the corresponding index in
   // the {constant_pool_offset} field of the code object.
   // TODO(titzer): placeholder code objects are somewhat dangerous.
   static byte buffer[] = {0, 0, 0, 0, 0, 0, 0, 0};  // fake instructions.
-  static CodeDesc desc = {buffer, 8, 8, 0, 0, nullptr};
+  static CodeDesc desc = {buffer, 8, 8, 0, 0, nullptr, nullptr, 0};
   Handle<Code> code = factory->NewCode(desc, Code::KindField::encode(kind),
                                        Handle<Object>::null());
   code->set_constant_pool_offset(static_cast<int>(index) + kPlaceholderMarker);
   return code;
 }
 
 // TODO(mtrofin): remove when we stop relying on placeholders.
 void InitializePlaceholders(Factory* factory,
                             std::vector<Handle<Code>>* placeholders,
                             size_t size) {
@@ skipping 841 matching lines @@
   Object* info = wasm->GetInternalField(kWasmDebugInfo);
   if (!info->IsUndefined(wasm->GetIsolate())) return WasmDebugInfo::cast(info);
   Handle<WasmDebugInfo> new_info = WasmDebugInfo::New(handle(wasm));
   wasm->SetInternalField(kWasmDebugInfo, *new_info);
   return *new_info;
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8