1 /*
   2  * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "ci/ciClassList.hpp"
  27 #include "ci/ciInstance.hpp"
  28 #include "ci/ciMethodData.hpp"
  29 #include "ci/ciMethodHandle.hpp"
  30 #include "ci/ciUtilities.hpp"
  31 #include "prims/methodHandleWalk.hpp"
  32 #include "prims/methodHandles.hpp"
  33 
  34 // ciMethodHandle
  35 
  36 // ------------------------------------------------------------------
  37 // ciMethodHandle::get_adapter
  38 //
  39 // Return an adapter for this MethodHandle.
  40 ciMethod* ciMethodHandle::get_adapter_impl(bool is_invokedynamic) const {
  41   VM_ENTRY_MARK;
  42   Handle h(get_oop());
  43   methodHandle callee(_callee->get_methodOop());
  44   assert(callee->is_method_handle_invoke(), "");
  45   oop mt1 = callee->method_handle_type();
  46   oop mt2 = java_lang_invoke_MethodHandle::type(h());
  47   if (!java_lang_invoke_MethodType::equals(mt1, mt2)) {
  48     if (PrintMiscellaneous && (Verbose || WizardMode)) {
  49       tty->print_cr("ciMethodHandle::get_adapter: types not equal");
  50       mt1->print(); mt2->print();
  51     }
  52     return NULL;
  53   }
  54   // We catch all exceptions here that could happen in the method
  55   // handle compiler and stop the VM.
  56   MethodHandleCompiler mhc(h, callee->name(), callee->signature(), _profile.count(), is_invokedynamic, THREAD);
  57   if (!HAS_PENDING_EXCEPTION) {
  58     methodHandle m = mhc.compile(THREAD);
  59     if (!HAS_PENDING_EXCEPTION) {
  60       return CURRENT_ENV->get_object(m())->as_method();
  61     }
  62   }
  63   if (PrintMiscellaneous && (Verbose || WizardMode)) {
  64     tty->print("*** ciMethodHandle::get_adapter => ");
  65     PENDING_EXCEPTION->print();
  66     tty->print("*** get_adapter (%s): ", is_invokedynamic ? "indy" : "mh"); ((ciObject*)this)->print();
  67   }
  68   CLEAR_PENDING_EXCEPTION;
  69   return NULL;
  70 }
  71 
  72 // ------------------------------------------------------------------
  73 // ciMethodHandle::get_adapter
  74 //
  75 // Return an adapter for this MethodHandle.
  76 ciMethod* ciMethodHandle::get_adapter(bool is_invokedynamic) const {
  77   ciMethod* result = get_adapter_impl(is_invokedynamic);
  78   if (result) {
  79     // Fake up the MDO maturity.
  80     ciMethodData* mdo = result->method_data();
  81     if (mdo != NULL && _caller->method_data() != NULL && _caller->method_data()->is_mature()) {
  82       mdo->set_mature();
  83     }
  84   }
  85   return result;
  86 }
  87 
  88 
  89 // ------------------------------------------------------------------
  90 // ciMethodHandle::print_impl
  91 //
  92 // Implementation of the print method.
  93 void ciMethodHandle::print_impl(outputStream* st) {
  94   st->print(" type=");
  95   get_oop()->print();
  96 }