src/hotspot/share/oops/constantPool.inline.hpp
changeset 49340 4e82736053ae
child 49816 a3e79f97e86b
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/oops/constantPool.inline.hpp	Mon Mar 05 10:29:23 2018 -0500
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2018, 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_OOPS_CONSTANTPOOL_INLINE_HPP
+#define SHARE_VM_OOPS_CONSTANTPOOL_INLINE_HPP
+
+#include "oops/constantPool.hpp"
+#include "runtime/orderAccess.inline.hpp"
+
+inline CPSlot ConstantPool::slot_at(int which) const {
+  assert(is_within_bounds(which), "index out of bounds");
+  assert(!tag_at(which).is_unresolved_klass() && !tag_at(which).is_unresolved_klass_in_error(), "Corrupted constant pool");
+  // Uses volatile because the klass slot changes without a lock.
+  intptr_t adr = OrderAccess::load_acquire(obj_at_addr(which));
+  assert(adr != 0 || which == 0, "cp entry for klass should not be zero");
+  return CPSlot(adr);
+}
+
+inline Klass* ConstantPool::resolved_klass_at(int which) const {  // Used by Compiler
+  guarantee(tag_at(which).is_klass(), "Corrupted constant pool");
+  // Must do an acquire here in case another thread resolved the klass
+  // behind our back, lest we later load stale values thru the oop.
+  CPKlassSlot kslot = klass_slot_at(which);
+  assert(tag_at(kslot.name_index()).is_symbol(), "sanity");
+
+  Klass** adr = resolved_klasses()->adr_at(kslot.resolved_klass_index());
+  return OrderAccess::load_acquire(adr);
+}
+
+inline bool ConstantPool::is_pseudo_string_at(int which) {
+  assert(tag_at(which).is_string(), "Corrupted constant pool");
+  return slot_at(which).is_pseudo_string();
+}
+
+inline oop ConstantPool::pseudo_string_at(int which, int obj_index) {
+  assert(is_pseudo_string_at(which), "must be a pseudo-string");
+  oop s = resolved_references()->obj_at(obj_index);
+  return s;
+}
+
+inline oop ConstantPool::pseudo_string_at(int which) {
+  assert(is_pseudo_string_at(which), "must be a pseudo-string");
+  int obj_index = cp_to_object_index(which);
+  oop s = resolved_references()->obj_at(obj_index);
+  return s;
+}
+
+#endif // SHARE_VM_OOPS_CONSTANTPOOL_INLINE_HPP