--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/gc_implementation/g1/concurrentMark.inline.hpp	Tue Jun 14 10:33:43 2011 -0400
@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARK_INLINE_HPP
+#define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARK_INLINE_HPP
+
+#include "gc_implementation/g1/concurrentMark.hpp"
+#include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
+
+inline void CMTask::push(oop obj) {
+  HeapWord* objAddr = (HeapWord*) obj;
+  assert(_g1h->is_in_g1_reserved(objAddr), "invariant");
+  assert(!_g1h->is_on_master_free_list(
+              _g1h->heap_region_containing((HeapWord*) objAddr)), "invariant");
+  assert(!_g1h->is_obj_ill(obj), "invariant");
+  assert(_nextMarkBitMap->isMarked(objAddr), "invariant");
+
+  if (_cm->verbose_high()) {
+    gclog_or_tty->print_cr("[%d] pushing "PTR_FORMAT, _task_id, (void*) obj);
+  }
+
+  if (!_task_queue->push(obj)) {
+    // The local task queue looks full. We need to push some entries
+    // to the global stack.
+
+    if (_cm->verbose_medium()) {
+      gclog_or_tty->print_cr("[%d] task queue overflow, "
+                             "moving entries to the global stack",
+                             _task_id);
+    }
+    move_entries_to_global_stack();
+
+    // this should succeed since, even if we overflow the global
+    // stack, we should have definitely removed some entries from the
+    // local queue. So, there must be space on it.
+    bool success = _task_queue->push(obj);
+    assert(success, "invariant");
+  }
+
+  statsOnly( int tmp_size = _task_queue->size();
+             if (tmp_size > _local_max_size)
+               _local_max_size = tmp_size;
+             ++_local_pushes );
+}
+
+// This determines whether the method below will check both the local
+// and global fingers when determining whether to push on the stack a
+// gray object (value 1) or whether it will only check the global one
+// (value 0). The tradeoffs are that the former will be a bit more
+// accurate and possibly push less on the stack, but it might also be
+// a little bit slower.
+
+#define _CHECK_BOTH_FINGERS_      1
+
+inline void CMTask::deal_with_reference(oop obj) {
+  if (_cm->verbose_high()) {
+    gclog_or_tty->print_cr("[%d] we're dealing with reference = "PTR_FORMAT,
+                           _task_id, (void*) obj);
+  }
+
+  ++_refs_reached;
+
+  HeapWord* objAddr = (HeapWord*) obj;
+  assert(obj->is_oop_or_null(true /* ignore mark word */), "Error");
+ if (_g1h->is_in_g1_reserved(objAddr)) {
+    assert(obj != NULL, "null check is implicit");
+    if (!_nextMarkBitMap->isMarked(objAddr)) {
+      // Only get the containing region if the object is not marked on the
+      // bitmap (otherwise, it's a waste of time since we won't do
+      // anything with it).
+      HeapRegion* hr = _g1h->heap_region_containing_raw(obj);
+      if (!hr->obj_allocated_since_next_marking(obj)) {
+        if (_cm->verbose_high()) {
+          gclog_or_tty->print_cr("[%d] "PTR_FORMAT" is not considered marked",
+                                 _task_id, (void*) obj);
+        }
+
+        // we need to mark it first
+        if (_nextMarkBitMap->parMark(objAddr)) {
+          // No OrderAccess:store_load() is needed. It is implicit in the
+          // CAS done in parMark(objAddr) above
+          HeapWord* global_finger = _cm->finger();
+
+#if _CHECK_BOTH_FINGERS_
+          // we will check both the local and global fingers
+
+          if (_finger != NULL && objAddr < _finger) {
+            if (_cm->verbose_high()) {
+              gclog_or_tty->print_cr("[%d] below the local finger ("PTR_FORMAT"), "
+                                     "pushing it", _task_id, _finger);
+            }
+            push(obj);
+          } else if (_curr_region != NULL && objAddr < _region_limit) {
+            // do nothing
+          } else if (objAddr < global_finger) {
+            // Notice that the global finger might be moving forward
+            // concurrently. This is not a problem. In the worst case, we
+            // mark the object while it is above the global finger and, by
+            // the time we read the global finger, it has moved forward
+            // passed this object. In this case, the object will probably
+            // be visited when a task is scanning the region and will also
+            // be pushed on the stack. So, some duplicate work, but no
+            // correctness problems.
+
+            if (_cm->verbose_high()) {
+              gclog_or_tty->print_cr("[%d] below the global finger "
+                                     "("PTR_FORMAT"), pushing it",
+                                     _task_id, global_finger);
+            }
+            push(obj);
+          } else {
+            // do nothing
+          }
+#else // _CHECK_BOTH_FINGERS_
+          // we will only check the global finger
+
+          if (objAddr < global_finger) {
+            // see long comment above
+
+            if (_cm->verbose_high()) {
+              gclog_or_tty->print_cr("[%d] below the global finger "
+                                     "("PTR_FORMAT"), pushing it",
+                                     _task_id, global_finger);
+            }
+            push(obj);
+          }
+#endif // _CHECK_BOTH_FINGERS_
+        }
+      }
+    }
+  }
+}
+
+#endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARK_INLINE_HPP