Add ABSL_ATTRIBUTE_LIFETIME_BOUND attribute on generated repeated and map field accessors.

This allows the compiler to statically detect use-after-free bugs.

This change touches a subset of field types. More changes to follow.

PiperOrigin-RevId: 564777204

Author: protobuf-github-bot

src/google/protobuf/compiler/cpp/field_generators/enum_field.cc

@@ -405,25 +405,35 @@ void RepeatedEnum::GenerateInlineAccessorDefinitions(io::Printer* p) const {
       // @@protoc_insertion_point(field_get:$pkg.Msg.field$)
       return static_cast<$Enum$>(_internal_$name$().Get(index));
     }
+  )cc");
+  p->Emit(R"cc(
     inline void $Msg$::set_$name$(int index, $Enum$ value) {
       $assert_valid$;
       _internal_mutable_$name$()->Set(index, value);
       $annotate_set$
       // @@protoc_insertion_point(field_set:$pkg.Msg.field$)
     }
+  )cc");
+  p->Emit(R"cc(
     inline void $Msg$::add_$name$($Enum$ value) {
       $assert_valid$;
       $TsanDetectConcurrentMutation$;
       _internal_mutable_$name$()->Add(value);
       $annotate_add$
       // @@protoc_insertion_point(field_add:$pkg.Msg.field$)
     }
-    inline const $pb$::RepeatedField<int>& $Msg$::$name$() const {
+  )cc");
+  p->Emit(R"cc(
+    inline const $pb$::RepeatedField<int>& $Msg$::$name$() const
+        ABSL_ATTRIBUTE_LIFETIME_BOUND {
       $annotate_list$;
       // @@protoc_insertion_point(field_list:$pkg.Msg.field$)
       return _internal_$name$();
     }
-    inline $pb$::RepeatedField<int>* $Msg$::mutable_$name$() {
+  )cc");
+  p->Emit(R"cc(
+    inline $pb$::RepeatedField<int>* $Msg$::mutable_$name$()
+        ABSL_ATTRIBUTE_LIFETIME_BOUND {
       $annotate_mutable_list$;
       // @@protoc_insertion_point(field_mutable_list:$pkg.Msg.field$)
       $TsanDetectConcurrentMutation$;

src/google/protobuf/compiler/cpp/field_generators/map_field.cc

@@ -224,17 +224,23 @@ void Map::GenerateInlineAccessorDefinitions(io::Printer* p) const {
       $TsanDetectConcurrentRead$;
       return $field_$.GetMap();
     }
-    inline const $Map$& $Msg$::$name$() const {
+  )cc");
+  p->Emit(R"cc(
+    inline const $Map$& $Msg$::$name$() const ABSL_ATTRIBUTE_LIFETIME_BOUND {
       $annotate_get$;
       // @@protoc_insertion_point(field_map:$pkg.Msg.field$)
       return _internal_$name$();
     }
+  )cc");
+  p->Emit(R"cc(
     inline $Map$* $Msg$::_internal_mutable_$name$() {
       $PrepareSplitMessageForWrite$;
       $TsanDetectConcurrentMutation$;
       return $field_$.MutableMap();
     }
-    inline $Map$* $Msg$::mutable_$name$() {
+  )cc");
+  p->Emit(R"cc(
+    inline $Map$* $Msg$::mutable_$name$() ABSL_ATTRIBUTE_LIFETIME_BOUND {
       $annotate_mutable$;
       // @@protoc_insertion_point(field_mutable_map:$pkg.Msg.field$)
       return _internal_mutable_$name$();

src/google/protobuf/compiler/cpp/field_generators/primitive_field.cc

@@ -474,30 +474,40 @@ void RepeatedPrimitive::GenerateInlineAccessorDefinitions(
       // @@protoc_insertion_point(field_get:$pkg.Msg.field$)
       return _internal_$name$().Get(index);
     }
+  )cc");
+  p->Emit(R"cc(
     inline void $Msg$::set_$name$(int index, $Type$ value) {
       $annotate_set$;
       _internal_mutable_$name$()->Set(index, value);
       // @@protoc_insertion_point(field_set:$pkg.Msg.field$)
     }
+  )cc");
+  p->Emit(R"cc(
     inline void $Msg$::add_$name$($Type$ value) {
       $TsanDetectConcurrentMutation$;
       _internal_mutable_$name$()->Add(value);
       $annotate_add$;
       // @@protoc_insertion_point(field_add:$pkg.Msg.field$)
     }
-    inline const $pb$::RepeatedField<$Type$>& $Msg$::$name$() const {
+  )cc");
+  p->Emit(R"cc(
+    inline const $pb$::RepeatedField<$Type$>& $Msg$::$name$() const
+        ABSL_ATTRIBUTE_LIFETIME_BOUND {
       $annotate_list$;
       // @@protoc_insertion_point(field_list:$pkg.Msg.field$)
       return _internal_$name$();
     }
-    inline $pb$::RepeatedField<$Type$>* $Msg$::mutable_$name$() {
+  )cc");
+  p->Emit(R"cc(
+    inline $pb$::RepeatedField<$Type$>* $Msg$::mutable_$name$()
+        ABSL_ATTRIBUTE_LIFETIME_BOUND {
       $annotate_mutable_list$;
       // @@protoc_insertion_point(field_mutable_list:$pkg.Msg.field$)
       $TsanDetectConcurrentMutation$;
       return _internal_mutable_$name$();
     }
-
   )cc");
+
   if (should_split()) {
     p->Emit(R"cc(
       inline const $pb$::RepeatedField<$Type$>& $Msg$::_internal_$name$()