Merge

src/share/vm/gc_implementation/g1/concurrentG1Refine.cpp

@@ -27,6 +27,7 @@
 #include "gc_implementation/g1/concurrentG1RefineThread.hpp"
 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
 #include "gc_implementation/g1/g1HotCardCache.hpp"
+#include "runtime/java.hpp"
 
 ConcurrentG1Refine::ConcurrentG1Refine(G1CollectedHeap* g1h) :
   _threads(NULL), _n_threads(0),
@@ -62,6 +63,10 @@ ConcurrentG1Refine::ConcurrentG1Refine(G1CollectedHeap* g1h) :
   for (int i = _n_threads - 1; i >= 0; i--) {
     ConcurrentG1RefineThread* t = new ConcurrentG1RefineThread(this, next, worker_id_offset, i);
     assert(t != NULL, "Conc refine should have been created");
+    if (t->osthread() == NULL) {
+        vm_shutdown_during_initialization("Could not create ConcurrentG1RefineThread");
+    }
+
     assert(t->cg1r() == this, "Conc refine thread should refer to this");
     _threads[i] = t;
     next = t;

src/share/vm/gc_implementation/g1/concurrentMark.cpp

@@ -553,6 +553,9 @@ ConcurrentMark::ConcurrentMark(G1CollectedHeap* g1h, ReservedSpace heap_rs) :
   _cmThread = new ConcurrentMarkThread(this);
   assert(cmThread() != NULL, "CM Thread should have been created");
   assert(cmThread()->cm() != NULL, "CM Thread should refer to this cm");
+  if (_cmThread->osthread() == NULL) {
+      vm_shutdown_during_initialization("Could not create ConcurrentMarkThread");
+  }
 
   assert(CGC_lock != NULL, "Where's the CGC_lock?");
   assert(_markBitMap1.covers(heap_rs), "_markBitMap1 inconsistency");

src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp

@@ -2433,20 +2433,6 @@ void PSParallelCompact::marking_phase(ParCompactionManager* cm,
   _gc_tracer.report_object_count_after_gc(is_alive_closure());
 }
 
-void PSParallelCompact::follow_klass(ParCompactionManager* cm, Klass* klass) {
-  ClassLoaderData* cld = klass->class_loader_data();
-  // The actual processing of the klass is done when we
-  // traverse the list of Klasses in the class loader data.
-  PSParallelCompact::follow_class_loader(cm, cld);
-}
-
-void PSParallelCompact::adjust_klass(ParCompactionManager* cm, Klass* klass) {
-  ClassLoaderData* cld = klass->class_loader_data();
-  // The actual processing of the klass is done when we
-  // traverse the list of Klasses in the class loader data.
-  PSParallelCompact::adjust_class_loader(cm, cld);
-}
-
 void PSParallelCompact::follow_class_loader(ParCompactionManager* cm,
                                             ClassLoaderData* cld) {
   PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
@@ -2455,13 +2441,6 @@ void PSParallelCompact::follow_class_loader(ParCompactionManager* cm,
   cld->oops_do(&mark_and_push_closure, &follow_klass_closure, true);
 }
 
-void PSParallelCompact::adjust_class_loader(ParCompactionManager* cm,
-                                            ClassLoaderData* cld) {
-  cld->oops_do(PSParallelCompact::adjust_pointer_closure(),
-               PSParallelCompact::adjust_klass_closure(),
-               true);
-}
-
 // This should be moved to the shared markSweep code!
 class PSAlwaysTrueClosure: public BoolObjectClosure {
 public:

src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.hpp

@@ -1200,13 +1200,10 @@ class PSParallelCompact : AllStatic {
                                                       T* p);
   template <class T> static inline void adjust_pointer(T* p);
 
-  static void follow_klass(ParCompactionManager* cm, Klass* klass);
-  static void adjust_klass(ParCompactionManager* cm, Klass* klass);
+  static inline void follow_klass(ParCompactionManager* cm, Klass* klass);
 
   static void follow_class_loader(ParCompactionManager* cm,
                                   ClassLoaderData* klass);
-  static void adjust_class_loader(ParCompactionManager* cm,
-                                  ClassLoaderData* klass);
 
   // Compaction support.
   // Return true if p is in the range [beg_addr, end_addr).
@@ -1380,6 +1377,11 @@ inline void PSParallelCompact::adjust_pointer(T* p) {
   }
 }
 
+inline void PSParallelCompact::follow_klass(ParCompactionManager* cm, Klass* klass) {
+  oop holder = klass->klass_holder();
+  PSParallelCompact::mark_and_push(cm, &holder);
+}
+
 template <class T>
 inline void PSParallelCompact::KeepAliveClosure::do_oop_work(T* p) {
   mark_and_push(_compaction_manager, p);

src/share/vm/memory/metaspace.cpp

@@ -287,7 +287,7 @@ class VirtualSpaceNode : public CHeapObj<mtClass> {
   VirtualSpace* virtual_space() const { return (VirtualSpace*) &_virtual_space; }
 
   // Returns true if "word_size" is available in the VirtualSpace
-  bool is_available(size_t word_size) { return _top + word_size <= end(); }
+  bool is_available(size_t word_size) { return word_size <= pointer_delta(end(), _top, sizeof(MetaWord)); }
 
   MetaWord* top() const { return _top; }
   void inc_top(size_t word_size) { _top += word_size; }
@@ -3641,10 +3641,82 @@ class TestVirtualSpaceNodeTest {
     }
 
   }
+
+#define assert_is_available_positive(word_size) \
+  assert(vsn.is_available(word_size), \
+    err_msg(#word_size ": " PTR_FORMAT " bytes were not available in " \
+            "VirtualSpaceNode [" PTR_FORMAT ", " PTR_FORMAT ")", \
+            (uintptr_t)(word_size * BytesPerWord), vsn.bottom(), vsn.end()));
+
+#define assert_is_available_negative(word_size) \
+  assert(!vsn.is_available(word_size), \
+    err_msg(#word_size ": " PTR_FORMAT " bytes should not be available in " \
+            "VirtualSpaceNode [" PTR_FORMAT ", " PTR_FORMAT ")", \
+            (uintptr_t)(word_size * BytesPerWord), vsn.bottom(), vsn.end()));
+
+  static void test_is_available_positive() {
+    // Reserve some memory.
+    VirtualSpaceNode vsn(os::vm_allocation_granularity());
+    assert(vsn.initialize(), "Failed to setup VirtualSpaceNode");
+
+    // Commit some memory.
+    size_t commit_word_size = os::vm_allocation_granularity() / BytesPerWord;
+    bool expanded = vsn.expand_by(commit_word_size, commit_word_size);
+    assert(expanded, "Failed to commit");
+
+    // Check that is_available accepts the committed size.
+    assert_is_available_positive(commit_word_size);
+
+    // Check that is_available accepts half the committed size.
+    size_t expand_word_size = commit_word_size / 2;
+    assert_is_available_positive(expand_word_size);
+  }
+
+  static void test_is_available_negative() {
+    // Reserve some memory.
+    VirtualSpaceNode vsn(os::vm_allocation_granularity());
+    assert(vsn.initialize(), "Failed to setup VirtualSpaceNode");
+
+    // Commit some memory.
+    size_t commit_word_size = os::vm_allocation_granularity() / BytesPerWord;
+    bool expanded = vsn.expand_by(commit_word_size, commit_word_size);
+    assert(expanded, "Failed to commit");
+
+    // Check that is_available doesn't accept a too large size.
+    size_t two_times_commit_word_size = commit_word_size * 2;
+    assert_is_available_negative(two_times_commit_word_size);
+  }
+
+  static void test_is_available_overflow() {
+    // Reserve some memory.
+    VirtualSpaceNode vsn(os::vm_allocation_granularity());
+    assert(vsn.initialize(), "Failed to setup VirtualSpaceNode");
+
+    // Commit some memory.
+    size_t commit_word_size = os::vm_allocation_granularity() / BytesPerWord;
+    bool expanded = vsn.expand_by(commit_word_size, commit_word_size);
+    assert(expanded, "Failed to commit");
+
+    // Calculate a size that will overflow the virtual space size.
+    void* virtual_space_max = (void*)(uintptr_t)-1;
+    size_t bottom_to_max = pointer_delta(virtual_space_max, vsn.bottom(), 1);
+    size_t overflow_size = bottom_to_max + BytesPerWord;
+    size_t overflow_word_size = overflow_size / BytesPerWord;
+
+    // Check that is_available can handle the overflow.
+    assert_is_available_negative(overflow_word_size);
+  }
+
+  static void test_is_available() {
+    TestVirtualSpaceNodeTest::test_is_available_positive();
+    TestVirtualSpaceNodeTest::test_is_available_negative();
+    TestVirtualSpaceNodeTest::test_is_available_overflow();
+  }
 };
 
 void TestVirtualSpaceNode_test() {
   TestVirtualSpaceNodeTest::test();
+  TestVirtualSpaceNodeTest::test_is_available();
 }
 
 #endif

src/share/vm/oops/instanceClassLoaderKlass.cpp

@@ -150,10 +150,6 @@ void InstanceClassLoaderKlass::oop_push_contents(PSPromotionManager* pm, oop obj
 
 int InstanceClassLoaderKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
   InstanceKlass::oop_update_pointers(cm, obj);
-  ClassLoaderData * const loader_data = java_lang_ClassLoader::loader_data(obj);
-  if (loader_data != NULL) {
-    PSParallelCompact::adjust_class_loader(cm, loader_data);
-  }
   return size_helper();
 }
 #endif // INCLUDE_ALL_GCS

src/share/vm/oops/instanceKlass.cpp

@@ -2199,7 +2199,6 @@ int InstanceKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
     obj, \
     PSParallelCompact::adjust_pointer(p), \
     assert_is_in)
-  obj->update_header(cm);
   return size;
 }
 

src/share/vm/oops/instanceMirrorKlass.cpp

@@ -155,8 +155,13 @@ void InstanceMirrorKlass::oop_follow_contents(oop obj) {
   // Follow the klass field in the mirror.
   Klass* klass = java_lang_Class::as_Klass(obj);
   if (klass != NULL) {
-    // For anonymous classes we need to handle the class loader data,
-    // otherwise it won't be claimed and can be unloaded.
+    // An anonymous class doesn't have its own class loader, so the call
+    // to follow_klass will mark and push its java mirror instead of the
+    // class loader. When handling the java mirror for an anonymous class
+    // we need to make sure its class loader data is claimed, this is done
+    // by calling follow_class_loader explicitly. For non-anonymous classes
+    // the call to follow_class_loader is made when the class loader itself
+    // is handled.
     if (klass->oop_is_instance() && InstanceKlass::cast(klass)->is_anonymous()) {
       MarkSweep::follow_class_loader(klass->class_loader_data());
     } else {
@@ -183,7 +188,18 @@ void InstanceMirrorKlass::oop_follow_contents(ParCompactionManager* cm,
   // Follow the klass field in the mirror.
   Klass* klass = java_lang_Class::as_Klass(obj);
   if (klass != NULL) {
+    // An anonymous class doesn't have its own class loader, so the call
+    // to follow_klass will mark and push its java mirror instead of the
+    // class loader. When handling the java mirror for an anonymous class
+    // we need to make sure its class loader data is claimed, this is done
+    // by calling follow_class_loader explicitly. For non-anonymous classes
+    // the call to follow_class_loader is made when the class loader itself
+    // is handled.
+    if (klass->oop_is_instance() && InstanceKlass::cast(klass)->is_anonymous()) {
+      PSParallelCompact::follow_class_loader(cm, klass->class_loader_data());
+    } else {
       PSParallelCompact::follow_klass(cm, klass);
+    }
   } else {
     // If klass is NULL then this a mirror for a primitive type.
     // We don't have to follow them, since they are handled as strong
@@ -332,17 +348,6 @@ int InstanceMirrorKlass::oop_update_pointers(ParCompactionManager* cm, oop obj)
   int size = oop_size(obj);
   InstanceKlass::oop_update_pointers(cm, obj);
 
-  // Follow the klass field in the mirror.
-  Klass* klass = java_lang_Class::as_Klass(obj);
-  if (klass != NULL) {
-    PSParallelCompact::adjust_klass(cm, klass);
-  } else {
-    // If klass is NULL then this a mirror for a primitive type.
-    // We don't have to follow them, since they are handled as strong
-    // roots in Universe::oops_do.
-    assert(java_lang_Class::is_primitive(obj), "Sanity check");
-  }
-
   InstanceMirrorKlass_OOP_ITERATE(                                            \
     start_of_static_fields(obj), java_lang_Class::static_oop_field_count(obj),\
     PSParallelCompact::adjust_pointer(p),                                     \

src/share/vm/oops/objArrayKlass.cpp

@@ -587,7 +587,6 @@ int ObjArrayKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
   assert (obj->is_objArray(), "obj must be obj array");
   objArrayOop a = objArrayOop(obj);
   int size = a->object_size();
-  a->update_header(cm);
   ObjArrayKlass_OOP_ITERATE(a, p, PSParallelCompact::adjust_pointer(p))
   return size;
 }

src/share/vm/oops/oop.hpp

@@ -328,11 +328,6 @@ class oopDesc {
   // return the size of this oop.  This is used by the MarkSweep collector.
   int adjust_pointers();
 
-#if INCLUDE_ALL_GCS
-  // Parallel old
-  void update_header(ParCompactionManager* cm);
-#endif // INCLUDE_ALL_GCS
-
   // mark-sweep support
   void follow_body(int begin, int end);
 

src/share/vm/oops/oop.pcgc.inline.hpp

@@ -80,8 +80,4 @@ inline oop oopDesc::forward_to_atomic(oop p) {
   return forwardee();
 }
 
-inline void oopDesc::update_header(ParCompactionManager* cm) {
-  PSParallelCompact::adjust_klass(cm, klass());
-}
-
 #endif // SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP