8303605: Memory leaks in Metaspace gtests

Reviewed-by: stuefe, dholmes

Author: jcking

test/hotspot/gtest/gtestMain.cpp

@@ -92,6 +92,7 @@ static int init_jvm(int argc, char **argv, bool disable_error_handling, JavaVM**
   JNIEnv* env;
 
   int ret = JNI_CreateJavaVM(jvm_ptr, (void**)&env, &args);
+  delete[] options;
   if (ret == JNI_OK) {
     // CreateJavaVM leaves WXExec context, while gtests
     // calls internal functions assuming running in WXWwrite.

test/hotspot/gtest/metaspace/metaspaceGtestSparseArray.hpp

@@ -99,6 +99,10 @@ class SparseArray : public StackObj {
     }
   }
 
+  ~SparseArray() {
+    FREE_C_HEAP_ARRAY(T, _slots);
+  }
+
   T at(int i)              { return _slots[i]; }
   const T at(int i) const  { return _slots[i]; }
   void set_at(int i, T e)  { _slots[i] = e; }

test/hotspot/gtest/metaspace/test_freeblocks.cpp

@@ -79,7 +79,7 @@ class FreeBlocksTest {
     return false;
   }
 
-  void deallocate_top() {
+  bool deallocate_top() {
 
     allocation_t* a = _allocations;
     if (a != NULL) {
@@ -88,7 +88,13 @@ class FreeBlocksTest {
       _freeblocks.add_block(a->p, a->word_size);
       delete a;
       DEBUG_ONLY(_freeblocks.verify();)
+      return true;
     }
+    return false;
+  }
+
+  void deallocate_all() {
+    while (deallocate_top());
   }
 
   bool allocate() {
@@ -182,6 +188,10 @@ class FreeBlocksTest {
     CHECK_CONTENT(_freeblocks, 1, 1024);
   }
 
+  ~FreeBlocksTest() {
+    deallocate_all();
+  }
+
   static void test_small_allocations() {
     FreeBlocksTest test(10);
     test.test_loop();

test/hotspot/gtest/metaspace/test_virtualspacenode.cpp

@@ -538,6 +538,10 @@ TEST_VM(metaspace, virtual_space_node_test_basics) {
   ASSERT_EQ(node->committed_words(), (size_t)0);
   ASSERT_EQ(node->committed_words(), scomm.get());
   DEBUG_ONLY(node->verify_locked();)
+
+  delete node;
+  ASSERT_EQ(scomm.get(), (size_t)0);
+  ASSERT_EQ(sres.get(), (size_t)0);
 }
 
 // Note: we unfortunately need TEST_VM even though the system tested