471 

   472 

   473 TEST_VM(metaspace, virtual_space_node_test_basics) {

   474 

   475   MutexLocker fcl(MetaspaceExpand_lock, Mutex::_no_safepoint_check_flag);

   476 

   477   const size_t word_size = metaspace::chklvl::MAX_CHUNK_WORD_SIZE * 10;

   478 

   479   SizeCounter scomm;

   480   SizeCounter sres;

   481   CommitLimiter cl (word_size * 2); // basically, no commit limiter.

   482 

   483   VirtualSpaceNode* node = VirtualSpaceNode::create_node(42, word_size, &cl, &sres, &scomm);

   484   ASSERT_NOT_NULL(node);

   485   ASSERT_EQ(node->committed_words(), (size_t)0);

   486   ASSERT_EQ(node->committed_words(), scomm.get());

   487   DEBUG_ONLY(node->verify(true);)

   488 

   489   bool b = node->ensure_range_is_committed(node->base(), node->word_size());

   490   ASSERT_TRUE(b);

   491   ASSERT_EQ(node->committed_words(), word_size);

   492   ASSERT_EQ(node->committed_words(), scomm.get());

   493   DEBUG_ONLY(node->verify(true);)

   494   zap_range(node->base(), node->word_size());

   495 

   496   node->uncommit_range(node->base(), node->word_size());

   497   ASSERT_EQ(node->committed_words(), (size_t)0);

   498   ASSERT_EQ(node->committed_words(), scomm.get());

   499   DEBUG_ONLY(node->verify(true);)

   500 

   501   const int num_granules = (int)(word_size / Settings::commit_granule_words());

   502   for (int i = 1; i < num_granules; i += 4) {

   503     b = node->ensure_range_is_committed(node->base(), i * Settings::commit_granule_words());

   504     ASSERT_TRUE(b);

   505     ASSERT_EQ(node->committed_words(), i * Settings::commit_granule_words());

   506     ASSERT_EQ(node->committed_words(), scomm.get());

   507     DEBUG_ONLY(node->verify(true);)

   508     zap_range(node->base(), i * Settings::commit_granule_words());

   509   }

   510 

   511   node->uncommit_range(node->base(), node->word_size());

   512   ASSERT_EQ(node->committed_words(), (size_t)0);

   513   ASSERT_EQ(node->committed_words(), scomm.get());

   514   DEBUG_ONLY(node->verify(true);)

   515 

   516 }

   517 

   518