[cleanup] Fix leftover clang-tidy warnings.

Fixing clang-tidy warning.
Replace 0 with nullptr.
Add NOLINT for special cases.
Add default/override to methods.

Bug: v8:8015
Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: Iff483356ace471d816051c6dd06ca08809ae1c09
Reviewed-on: https://chromium-review.googlesource.com/1238333
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#56129}

src/api.cc

@@ -1773,15 +1773,15 @@ static i::Handle<i::InterceptorInfo> CreateInterceptorInfo(
       isolate->factory()->NewStruct(i::INTERCEPTOR_INFO_TYPE, i::TENURED));
   obj->set_flags(0);
 
-  if (getter != 0) SET_FIELD_WRAPPED(isolate, obj, set_getter, getter);
-  if (setter != 0) SET_FIELD_WRAPPED(isolate, obj, set_setter, setter);
-  if (query != 0) SET_FIELD_WRAPPED(isolate, obj, set_query, query);
-  if (descriptor != 0)
+  if (getter != nullptr) SET_FIELD_WRAPPED(isolate, obj, set_getter, getter);
+  if (setter != nullptr) SET_FIELD_WRAPPED(isolate, obj, set_setter, setter);
+  if (query != nullptr) SET_FIELD_WRAPPED(isolate, obj, set_query, query);
+  if (descriptor != nullptr)
     SET_FIELD_WRAPPED(isolate, obj, set_descriptor, descriptor);
-  if (remover != 0) SET_FIELD_WRAPPED(isolate, obj, set_deleter, remover);
-  if (enumerator != 0)
+  if (remover != nullptr) SET_FIELD_WRAPPED(isolate, obj, set_deleter, remover);
+  if (enumerator != nullptr)
     SET_FIELD_WRAPPED(isolate, obj, set_enumerator, enumerator);
-  if (definer != 0) SET_FIELD_WRAPPED(isolate, obj, set_definer, definer);
+  if (definer != nullptr) SET_FIELD_WRAPPED(isolate, obj, set_definer, definer);
   obj->set_can_intercept_symbols(
       !(static_cast<int>(flags) &
         static_cast<int>(PropertyHandlerFlags::kOnlyInterceptStrings)));

src/assembler.h

@@ -364,7 +364,7 @@ class CpuFeatureScope {
 #else
   CpuFeatureScope(AssemblerBase* assembler, CpuFeature f,
                   CheckPolicy check = kCheckSupported) {}
-  ~CpuFeatureScope() {
+  ~CpuFeatureScope() {  // NOLINT (modernize-use-equals-default)
     // Define a destructor to avoid unused variable warnings.
   }
 #endif
@@ -461,7 +461,7 @@ class ConstantPoolEntry {
   int position() const { return position_; }
   bool sharing_ok() const { return merged_index_ != SHARING_PROHIBITED; }
   bool is_merged() const { return merged_index_ >= 0; }
-  int merged_index(void) const {
+  int merged_index() const {
     DCHECK(is_merged());
     return merged_index_;
   }
@@ -470,7 +470,7 @@ class ConstantPoolEntry {
     merged_index_ = index;
     DCHECK(is_merged());
   }
-  int offset(void) const {
+  int offset() const {
     DCHECK_GE(merged_index_, 0);
     return merged_index_;
   }

src/assert-scope.h

@@ -77,7 +77,7 @@ class PerThreadAssertScopeDebugOnly : public
 #else
 class PerThreadAssertScopeDebugOnly {
  public:
-  PerThreadAssertScopeDebugOnly() {
+  PerThreadAssertScopeDebugOnly() {  // NOLINT (modernize-use-equals-default)
     // Define a constructor to avoid unused variable warnings.
   }
   void Release() {}

src/base/lsan-page-allocator.h

@@ -19,7 +19,7 @@ class V8_BASE_EXPORT LsanPageAllocator
     : public NON_EXPORTED_BASE(::v8::PageAllocator) {
  public:
   LsanPageAllocator(v8::PageAllocator* page_allocator);
-  virtual ~LsanPageAllocator() = default;
+  ~LsanPageAllocator() override = default;
 
   size_t AllocatePageSize() override { return allocate_page_size_; }
 

src/compiler/node.h

@@ -582,15 +582,6 @@ class Node::Uses::const_iterator final {
   typedef Node** pointer;
   typedef Node*& reference;
 
-  const_iterator(const const_iterator& other)
-      : current_(other.current_)
-#ifdef DEBUG
-        ,
-        next_(other.next_)
-#endif
-  {
-  }
-
   Node* operator*() const { return current_->from(); }
   bool operator==(const const_iterator& other) const {
     return other.current_ == current_;

src/debug/debug-frames.cc

@@ -51,6 +51,7 @@ FrameInspector::FrameInspector(StandardFrame* frame, int inlined_frame_index,
   }
 }
 
+// NOLINTNEXTLINE
 FrameInspector::~FrameInspector() {
   // Destructor needs to be defined in the .cc file, because it instantiates
   // std::unique_ptr destructors but the types are not known in the header.

src/debug/debug-frames.h

@@ -19,7 +19,7 @@ class FrameInspector {
   FrameInspector(StandardFrame* frame, int inlined_frame_index,
                  Isolate* isolate);
 
-  ~FrameInspector();
+  ~FrameInspector();  // NOLINT (modernize-use-equals-default)
 
   int GetParametersCount();
   Handle<JSFunction> GetFunction() const { return function_; }

src/heap/factory.h

@@ -961,6 +961,7 @@ class V8_EXPORT_PRIVATE Factory {
     // Downcast to the privately inherited sub-class using c-style casts to
     // avoid undefined behavior (as static_cast cannot cast across private
     // bases).
+    // NOLINTNEXTLINE (google-readability-casting)
     return (Isolate*)this;  // NOLINT(readability/casting)
   }
 

src/identity-map.h

@@ -120,7 +120,7 @@ class IdentityMap : public IdentityMapBase {
     void* v = nullptr;
     bool deleted_something = DeleteEntry(key, &v);
     if (deleted_value != nullptr && deleted_something) {
-      *deleted_value = (V) reinterpret_cast<intptr_t>(v);
+      *deleted_value = *reinterpret_cast<V*>(&v);
     }
     return deleted_something;
   }

src/interpreter/control-flow-builders.h

@@ -149,7 +149,7 @@ class V8_EXPORT_PRIVATE SwitchBuilder final
         case_sites_(builder->zone()) {
     case_sites_.resize(number_of_cases);
   }
-  ~SwitchBuilder() override;
+  ~SwitchBuilder() override;  // NOLINT (modernize-use-equals-default)
 
   // This method should be called by the SwitchBuilder owner when the case
   // statement with |index| is emitted to update the case jump site.

src/isolate.cc

@@ -2300,6 +2300,7 @@ void Isolate::UnregisterManagedPtrDestructor(ManagedPtrDestructor* destructor) {
   destructor->next_ = nullptr;
 }
 
+// NOLINTNEXTLINE
 Isolate::PerIsolateThreadData::~PerIsolateThreadData() {
 #if defined(USE_SIMULATOR)
   delete simulator_;

src/isolate.h

@@ -1094,6 +1094,7 @@ class Isolate : private HiddenFactory {
   v8::internal::Factory* factory() {
     // Upcast to the privately inherited base-class using c-style casts to avoid
     // undefined behavior (as static_cast cannot cast across private bases).
+    // NOLINTNEXTLINE (google-readability-casting)
     return (v8::internal::Factory*)this;  // NOLINT(readability/casting)
   }
 

src/libplatform/default-worker-threads-task-runner.cc

@@ -17,6 +17,7 @@ DefaultWorkerThreadsTaskRunner::DefaultWorkerThreadsTaskRunner(
   }
 }
 
+// NOLINTNEXTLINE
 DefaultWorkerThreadsTaskRunner::~DefaultWorkerThreadsTaskRunner() {
   // This destructor is needed because we have unique_ptr to the WorkerThreads,
   // und the {WorkerThread} class is forward declared in the header file.

src/objects/js-number-format.cc

@@ -32,7 +32,7 @@ namespace {
 int CurrencyDigits(const icu::UnicodeString& currency) {
   UErrorCode status = U_ZERO_ERROR;
   uint32_t fraction_digits = ucurr_getDefaultFractionDigits(
-      (const UChar*)(currency.getBuffer()), &status);
+      reinterpret_cast<const UChar*>(currency.getBuffer()), &status);
   // For missing currency codes, default to the most common, 2
   return U_SUCCESS(status) ? fraction_digits : 2;
 }

src/snapshot/serializer-common.h

@@ -39,7 +39,7 @@ class ExternalReferenceEncoder {
   };
 
   explicit ExternalReferenceEncoder(Isolate* isolate);
-  ~ExternalReferenceEncoder();
+  ~ExternalReferenceEncoder();  // NOLINT (modernize-use-equals-default)
 
   Value Encode(Address key);
   Maybe<Value> TryEncode(Address key);

src/snapshot/serializer.h

@@ -284,6 +284,7 @@ class Serializer<AllocatorT>::ObjectSerializer : public ObjectVisitor {
     serializer_->PushStack(obj);
 #endif  // DEBUG
   }
+  // NOLINTNEXTLINE (modernize-use-equals-default)
   ~ObjectSerializer() override {
 #ifdef DEBUG
     serializer_->PopStack();

src/wasm/wasm-serialization.cc

@@ -47,8 +47,8 @@ class Writer {
     WriteUnalignedValue(reinterpret_cast<Address>(current_location()), value);
     pos_ += sizeof(T);
     if (FLAG_trace_wasm_serialization) {
-      StdoutStream{} << "wrote: " << (size_t)value << " sized: " << sizeof(T)
-                     << std::endl;
+      StdoutStream{} << "wrote: " << static_cast<size_t>(value)
+                     << " sized: " << sizeof(T) << std::endl;
     }
   }
 
@@ -91,8 +91,8 @@ class Reader {
         ReadUnalignedValue<T>(reinterpret_cast<Address>(current_location()));
     pos_ += sizeof(T);
     if (FLAG_trace_wasm_serialization) {
-      StdoutStream{} << "read: " << (size_t)value << " sized: " << sizeof(T)
-                     << std::endl;
+      StdoutStream{} << "read: " << static_cast<size_t>(value)
+                     << " sized: " << sizeof(T) << std::endl;
     }
     return value;
   }

test/cctest/cctest.h

@@ -598,7 +598,7 @@ class StaticOneByteResource : public v8::String::ExternalOneByteStringResource {
  public:
   explicit StaticOneByteResource(const char* data) : data_(data) {}
 
-  ~StaticOneByteResource() = default;
+  ~StaticOneByteResource() override = default;
 
   const char* data() const override { return data_; }