Add shutdown code for several newly introduced leaks;

Disable commandline interface test for heap check tests.

Change-Id: I02aa2ad9704e3c70dcecae8b3b3557b18607d455

src/google/protobuf/compiler/command_line_interface_unittest.cc

@@ -64,6 +64,10 @@
 #include <gtest/gtest.h>
 
 
+// Disable the whole test when we use tcmalloc for "draconian" heap checks, in
+// which case tcmalloc will print warnings that fail the plugin tests.
+#if !GOOGLE_PROTOBUF_HEAP_CHECK_DRACONIAN
+
 namespace google {
 namespace protobuf {
 namespace compiler {
@@ -1663,3 +1667,5 @@ TEST_F(EncodeDecodeTest, ProtoParseError) {
 }  // namespace compiler
 }  // namespace protobuf
 }  // namespace google
+
+#endif // !GOOGLE_PROTOBUF_HEAP_CHECK_DRACONIAN

src/google/protobuf/generated_message_reflection.cc

@@ -247,8 +247,14 @@ namespace {
 UnknownFieldSet* empty_unknown_field_set_ = NULL;
 GOOGLE_PROTOBUF_DECLARE_ONCE(empty_unknown_field_set_once_);
 
+void DeleteEmptyUnknownFieldSet() {
+  delete empty_unknown_field_set_;
+  empty_unknown_field_set_ = NULL;
+}
+
 void InitEmptyUnknownFieldSet() {
   empty_unknown_field_set_ = new UnknownFieldSet;
+  internal::OnShutdown(&DeleteEmptyUnknownFieldSet);
 }
 
 const UnknownFieldSet& GetEmptyUnknownFieldSet() {

src/google/protobuf/message.cc

@@ -440,6 +440,30 @@ const internal::RepeatedFieldAccessor* Reflection::RepeatedFieldAccessor(
   return NULL;
 }
 
+namespace internal {
+namespace {
+void ShutdownRepeatedFieldAccessor() {
+  Singleton<internal::RepeatedFieldPrimitiveAccessor<int32> >::ShutDown();
+  Singleton<internal::RepeatedFieldPrimitiveAccessor<uint32> >::ShutDown();
+  Singleton<internal::RepeatedFieldPrimitiveAccessor<int64> >::ShutDown();
+  Singleton<internal::RepeatedFieldPrimitiveAccessor<uint64> >::ShutDown();
+  Singleton<internal::RepeatedFieldPrimitiveAccessor<float> >::ShutDown();
+  Singleton<internal::RepeatedFieldPrimitiveAccessor<double> >::ShutDown();
+  Singleton<internal::RepeatedFieldPrimitiveAccessor<bool> >::ShutDown();
+  Singleton<internal::RepeatedPtrFieldStringAccessor>::ShutDown();
+  Singleton<internal::RepeatedPtrFieldMessageAccessor>::ShutDown();
+  Singleton<internal::MapFieldAccessor>::ShutDown();
+};
+
+struct ShutdownRepeatedFieldRegister {
+  ShutdownRepeatedFieldRegister() {
+    OnShutdown(&ShutdownRepeatedFieldAccessor);
+  }
+} shutdown_;
+
+}  // namesapce
+}  // namespace internal
+
 namespace internal {
 // Macro defined in repeated_field.h. We can only define the Message-specific
 // GenericTypeHandler specializations here because we depend on Message, which

src/google/protobuf/stubs/singleton.h

@@ -44,6 +44,10 @@ class Singleton {
     GoogleOnceInit(&once_, &Singleton<T>::Init);
     return instance_;
   }
+  static void ShutDown() {
+    delete instance_;
+    instance_ = NULL;
+  }
  private:
   static void Init() {
     instance_ = new T();
@@ -56,7 +60,7 @@ template<typename T>
 ProtobufOnceType Singleton<T>::once_;
 
 template<typename T>
-T* Singleton<T>::instance_;
+T* Singleton<T>::instance_ = NULL;
 }  // namespace internal
 }  // namespace protobuf
 }  // namespace google