The following issues were found

src/google/protobuf/inlined_string_field.h
1 issues
char - Statically-sized arrays can be improperly restricted, leading to potential overflows or other issues
Security

Line: 275 Column: 24 CWE codes: 119 120
Suggestion: Perform bounds checking, use functions that limit length, or ensure that the size is larger than the maximum possible length 

                PROTOBUF_NDEBUG_INLINE std::string* get_mutable();
  PROTOBUF_NDEBUG_INLINE const std::string* get_const() const;

  alignas(std::string) char value_[sizeof(std::string)];

  std::string* MutableSlow(::google::protobuf::Arena* arena, bool donated,
                           uint32_t* donating_states, uint32_t mask);

Reported by FlawFinder.

src/google/protobuf/inlined_string_field_unittest.cc
1 issues
syntax error
Error

Line: 63 

              const uint32 kMask1 = ~0x00000004u;
const uint32 kMask2 = ~0x00000020u;

TEST(InlinedStringFieldTest, SetOnHeap) {
  InlinedStringField field;
  uint32 donating_states = 0;
  const std::string kDefaultValue = "default";
  field.Set(&kDefaultValue, WrapString("Test short"), nullptr, false,
            &donating_states, kMask);

Reported by Cppcheck.

src/google/protobuf/extension_set_unittest.cc
1 issues
syntax error
Error

Line: 69 

              // This test closely mirrors net/proto2/compiler/cpp/internal/unittest.cc
// except that it uses extensions rather than regular fields.

TEST(ExtensionSetTest, Defaults) {
  // Check that all default values are set correctly in the initial message.
  unittest::TestAllExtensions message;

  TestUtil::ExpectExtensionsClear(message);

Reported by Cppcheck.

src/google/protobuf/empty.pb.cc
1 issues
There is an unknown macro here somewhere. Configuration is required. If PROTOBUF_NAMESPACE_OPEN is a macro then please configure it.
Error

Line: 115 

              
// @@protoc_insertion_point(namespace_scope)
PROTOBUF_NAMESPACE_CLOSE
PROTOBUF_NAMESPACE_OPEN
template<> PROTOBUF_NOINLINE ::PROTOBUF_NAMESPACE_ID::Empty* Arena::CreateMaybeMessage< ::PROTOBUF_NAMESPACE_ID::Empty >(Arena* arena) {
  return Arena::CreateMessageInternal< ::PROTOBUF_NAMESPACE_ID::Empty >(arena);
}
PROTOBUF_NAMESPACE_CLOSE

Reported by Cppcheck.

java/core/src/main/java/com/google/protobuf/BufferAllocator.java
1 issues
Field UNPOOLED has the same name as a method
Error

Line: 41 

               */
@ExperimentalApi
abstract class BufferAllocator {
  private static final BufferAllocator UNPOOLED =
      new BufferAllocator() {
        @Override
        public AllocatedBuffer allocateHeapBuffer(int capacity) {
          return AllocatedBuffer.wrap(new byte[capacity]);
        }

Reported by PMD.

src/google/protobuf/dynamic_message_unittest.cc
1 issues
syntax error
Error

Line: 126 

                }
};

TEST_F(DynamicMessageTest, Descriptor) {
  // Check that the descriptor on the DynamicMessage matches the descriptor
  // passed to GetPrototype().
  EXPECT_EQ(prototype_->GetDescriptor(), descriptor_);
}

Reported by Cppcheck.