Automated rollback of commit 6b22fd125c.

PiperOrigin-RevId: 676010627

src/google/protobuf/descriptor.cc

@@ -33,7 +33,6 @@
 #include <utility>
 #include <vector>
 
-#include "absl/algorithm/container.h"
 #include "absl/base/attributes.h"
 #include "absl/base/call_once.h"
 #include "absl/base/casts.h"
@@ -73,7 +72,6 @@
 #include "google/protobuf/descriptor_visitor.h"
 #include "google/protobuf/dynamic_message.h"
 #include "google/protobuf/feature_resolver.h"
-#include "google/protobuf/generated_enum_util.h"
 #include "google/protobuf/generated_message_util.h"
 #include "google/protobuf/io/strtod.h"
 #include "google/protobuf/io/tokenizer.h"
@@ -2587,33 +2585,6 @@ const FieldDescriptor* Descriptor::map_value() const {
   return field(1);
 }
 
-const uint32_t* EnumDescriptor::GetValidatorData() const {
-  // We generate the data on demand to delay the memory usage until we actually
-  // need it.
-  if (auto* p = validator_data_.load(std::memory_order_acquire)) return p;
-
-  std::vector<int32_t> values;
-  for (const auto& v : absl::MakeSpan(values_, value_count_)) {
-    values.push_back(v.number());
-  }
-  absl::c_sort(values);
-  values.erase(std::unique(values.begin(), values.end()), values.end());
-  auto data = internal::GenerateEnumData(values);
-
-  absl::MutexLockMaybe lock(file_->pool_->mutex_);
-
-  // Do the check again under the mutex to avoid wasting memory in case someone
-  // raced us. The memory is held by the pool, so "leaking" it can add up.
-  // But we do the preparation work above to not put all of that under the lock.
-  if (auto* p = validator_data_.load(std::memory_order_acquire)) return p;
-
-  uint32_t* owned_data = static_cast<uint32_t*>(
-      file_->pool_->tables_->AllocateBytes(data.size() * sizeof(uint32_t)));
-  memcpy(owned_data, data.data(), data.size() * sizeof(uint32_t));
-  validator_data_.store(owned_data, std::memory_order_release);
-  return owned_data;
-}
-
 const EnumValueDescriptor* EnumDescriptor::FindValueByName(
     absl::string_view name) const {
   return file()->tables_->FindNestedSymbol(this, name).enum_value_descriptor();
@@ -5199,7 +5170,6 @@ Symbol DescriptorPool::NewPlaceholderWithMutexHeld(
     placeholder_enum->merged_features_ = &FeatureSet::default_instance();
     placeholder_enum->is_placeholder_ = true;
     placeholder_enum->is_unqualified_placeholder_ = (name[0] != '.');
-    placeholder_enum->validator_data_.store(nullptr, std::memory_order_relaxed);
 
     // Enums must have at least one value.
     placeholder_enum->value_count_ = 1;
@@ -7058,7 +7028,6 @@ void DescriptorBuilder::BuildEnum(const EnumDescriptorProto& proto,
   result->containing_type_ = parent;
   result->is_placeholder_ = false;
   result->is_unqualified_placeholder_ = false;
-  result->validator_data_.store(nullptr, std::memory_order_relaxed);
 
   if (proto.value_size() == 0) {
     // We cannot allow enums with no values because this would mean there

src/google/protobuf/descriptor.h

@@ -1455,8 +1455,6 @@ class PROTOBUF_EXPORT EnumDescriptor : private internal::SymbolBase {
   // to this descriptor from the file root.
   void GetLocationPath(std::vector<int>* output) const;
 
-  const uint32_t* GetValidatorData() const;
-
   // True if this is a placeholder for an unknown type.
   bool is_placeholder_ : 1;
   // True if this is a placeholder and the type name wasn't fully-qualified.
@@ -1487,8 +1485,6 @@ class PROTOBUF_EXPORT EnumDescriptor : private internal::SymbolBase {
   EnumDescriptor::ReservedRange* reserved_ranges_;
   const std::string** reserved_names_;
 
-  mutable std::atomic<const uint32_t*> validator_data_;
-
   // IMPORTANT:  If you add a new field, make sure to search for all instances
   // of Allocate<EnumDescriptor>() and AllocateArray<EnumDescriptor>() in
   // descriptor.cc and update them to initialize the field.
@@ -1505,7 +1501,7 @@ class PROTOBUF_EXPORT EnumDescriptor : private internal::SymbolBase {
   friend class Reflection;
 };
 
-PROTOBUF_INTERNAL_CHECK_CLASS_SIZE(EnumDescriptor, 96);
+PROTOBUF_INTERNAL_CHECK_CLASS_SIZE(EnumDescriptor, 88);
 
 // Describes an individual enum constant of a particular type.  To get the
 // EnumValueDescriptor for a given enum value, first get the EnumDescriptor

src/google/protobuf/generated_message_reflection.cc

@@ -3305,18 +3305,29 @@ void Reflection::PopulateTcParseEntries(
     TcParseTableBase::FieldEntry* entries) const {
   for (const auto& entry : table_info.field_entries) {
     const FieldDescriptor* field = entry.field;
-    const OneofDescriptor* oneof = field->real_containing_oneof();
-    entries->offset = schema_.GetFieldOffset(field);
-    if (oneof != nullptr) {
-      entries->has_idx = schema_.oneof_case_offset_ + 4 * oneof->index();
-    } else if (schema_.HasHasbits()) {
-      entries->has_idx =
-          static_cast<int>(8 * schema_.HasBitsOffset() + entry.hasbit_idx);
+    if (field->type() == field->TYPE_ENUM &&
+        (entry.type_card & internal::field_layout::kTvMask) ==
+            internal::field_layout::kTvEnum &&
+        table_info.aux_entries[entry.aux_idx].type ==
+            internal::TailCallTableInfo::kEnumValidator) {
+      // Mini parse can't handle it. Fallback to reflection.
+      *entries = {};
+      table_info.aux_entries[entry.aux_idx] = {};
     } else {
-      entries->has_idx = 0;
+      const OneofDescriptor* oneof = field->real_containing_oneof();
+      entries->offset = schema_.GetFieldOffset(field);
+      if (oneof != nullptr) {
+        entries->has_idx = schema_.oneof_case_offset_ + 4 * oneof->index();
+      } else if (schema_.HasHasbits()) {
+        entries->has_idx =
+            static_cast<int>(8 * schema_.HasBitsOffset() + entry.hasbit_idx);
+      } else {
+        entries->has_idx = 0;
+      }
+      entries->aux_idx = entry.aux_idx;
+      entries->type_card = entry.type_card;
     }
-    entries->aux_idx = entry.aux_idx;
-    entries->type_card = entry.type_card;
+
     ++entries;
   }
 }
@@ -3361,8 +3372,7 @@ void Reflection::PopulateTcParseFieldAux(
                                    aux_entry.enum_range.size};
         break;
       case internal::TailCallTableInfo::kEnumValidator:
-        field_aux++->enum_data =
-            aux_entry.field->enum_type()->GetValidatorData();
+        ABSL_LOG(FATAL) << "Not supported.";
         break;
       case internal::TailCallTableInfo::kNumericOffset:
         field_aux++->offset = aux_entry.offset;