--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/ci/ciSignature.cpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 1999, 2016, 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.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "ci/ciMethodType.hpp"
+#include "ci/ciSignature.hpp"
+#include "ci/ciUtilities.hpp"
+#include "memory/allocation.inline.hpp"
+#include "memory/resourceArea.hpp"
+#include "oops/oop.inline.hpp"
+#include "runtime/signature.hpp"
+
+// ciSignature
+//
+// This class represents the signature of a method.
+
+// ------------------------------------------------------------------
+// ciSignature::ciSignature
+ciSignature::ciSignature(ciKlass* accessing_klass, const constantPoolHandle& cpool, ciSymbol* symbol) {
+  ASSERT_IN_VM;
+  EXCEPTION_CONTEXT;
+  _accessing_klass = accessing_klass;
+  _symbol = symbol;
+
+  ciEnv* env = CURRENT_ENV;
+  Arena* arena = env->arena();
+  _types = new (arena) GrowableArray<ciType*>(arena, 8, 0, NULL);
+
+  int size = 0;
+  int count = 0;
+  ResourceMark rm(THREAD);
+  Symbol* sh = symbol->get_symbol();
+  SignatureStream ss(sh);
+  for (; ; ss.next()) {
+    // Process one element of the signature
+    ciType* type;
+    if (!ss.is_object()) {
+      type = ciType::make(ss.type());
+    } else {
+      Symbol* name = ss.as_symbol(THREAD);
+      if (HAS_PENDING_EXCEPTION) {
+        type = ss.is_array() ? (ciType*)ciEnv::unloaded_ciobjarrayklass()
+          : (ciType*)ciEnv::unloaded_ciinstance_klass();
+        env->record_out_of_memory_failure();
+        CLEAR_PENDING_EXCEPTION;
+      } else {
+        ciSymbol* klass_name = env->get_symbol(name);
+        type = env->get_klass_by_name_impl(_accessing_klass, cpool, klass_name, false);
+      }
+    }
+    _types->append(type);
+    if (ss.at_return_type()) {
+      // Done processing the return type; do not add it into the count.
+      break;
+    }
+    size += type->size();
+    count++;
+  }
+  _size = size;
+  _count = count;
+}
+
+// ------------------------------------------------------------------
+// ciSignature::ciSignature
+ciSignature::ciSignature(ciKlass* accessing_klass, ciSymbol* symbol, ciMethodType* method_type) :
+  _symbol(symbol),
+  _accessing_klass(accessing_klass),
+  _size( method_type->ptype_slot_count()),
+  _count(method_type->ptype_count())
+{
+  ASSERT_IN_VM;
+  EXCEPTION_CONTEXT;
+  Arena* arena = CURRENT_ENV->arena();
+  _types = new (arena) GrowableArray<ciType*>(arena, _count + 1, 0, NULL);
+  for (int i = 0; i < _count; i++) {
+    _types->append(method_type->ptype_at(i));
+  }
+  _types->append(method_type->rtype());
+}
+
+// ------------------------------------------------------------------
+// ciSignature::return_type
+//
+// What is the return type of this signature?
+ciType* ciSignature::return_type() const {
+  return _types->at(_count);
+}
+
+// ------------------------------------------------------------------
+// ciSignature::type_at
+//
+// What is the type of the index'th element of this
+// signature?
+ciType* ciSignature::type_at(int index) const {
+  assert(index < _count, "out of bounds");
+  // The first _klasses element holds the return klass.
+  return _types->at(index);
+}
+
+// ------------------------------------------------------------------
+// ciSignature::equals
+//
+// Compare this signature to another one.  Signatures with different
+// accessing classes but with signature-types resolved to the same
+// types are defined to be equal.
+bool ciSignature::equals(ciSignature* that) {
+  // Compare signature
+  if (!this->as_symbol()->equals(that->as_symbol()))  return false;
+  // Compare all types of the arguments
+  for (int i = 0; i < _count; i++) {
+    if (this->type_at(i) != that->type_at(i))         return false;
+  }
+  // Compare the return type
+  if (this->return_type() != that->return_type())     return false;
+  return true;
+}
+
+// ------------------------------------------------------------------
+// ciSignature::print_signature
+void ciSignature::print_signature() {
+  _symbol->print_symbol();
+}
+
+// ------------------------------------------------------------------
+// ciSignature::print
+void ciSignature::print() {
+  tty->print("<ciSignature symbol=");
+  print_signature();
+ tty->print(" accessing_klass=");
+  _accessing_klass->print();
+  tty->print(" address=" INTPTR_FORMAT ">", p2i((address)this));
+}