1 /*
   2  * Copyright (c) 1998, 2016, 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 "oops/compiledICHolder.hpp"
  27 #include "oops/klass.hpp"
  28 #include "oops/method.hpp"
  29 #include "runtime/atomic.hpp"
  30 
  31 volatile int CompiledICHolder::_live_count;
  32 volatile int CompiledICHolder::_live_not_claimed_count;
  33 
  34 
  35 CompiledICHolder::CompiledICHolder(Metadata* metadata, Klass* klass)
  36   : _holder_metadata(metadata), _holder_klass(klass) {
  37 #ifdef ASSERT
  38   Atomic::inc(&_live_count);
  39   Atomic::inc(&_live_not_claimed_count);
  40 #endif // ASSERT
  41 }
  42 
  43 #ifdef ASSERT
  44 CompiledICHolder::~CompiledICHolder() {
  45   assert(_live_count > 0, "underflow");
  46   Atomic::dec(&_live_count);
  47 }
  48 #endif // ASSERT
  49 
  50 bool CompiledICHolder::is_loader_alive(BoolObjectClosure* is_alive) {
  51   if (_holder_metadata->is_method()) {
  52     if (!((Method*)_holder_metadata)->method_holder()->is_loader_alive(is_alive)) {
  53       return false;
  54     }
  55   } else if (_holder_metadata->is_klass()) {
  56     if (!((Klass*)_holder_metadata)->is_loader_alive(is_alive)) {
  57       return false;
  58     }
  59   }
  60   if (!_holder_klass->is_loader_alive(is_alive)) {
  61     return false;
  62   }
  63   return true;
  64 }
  65 
  66 // Printing
  67 
  68 void CompiledICHolder::print_on(outputStream* st) const {
  69   st->print("%s", internal_name());
  70   st->print(" - metadata: "); holder_metadata()->print_value_on(st); st->cr();
  71   st->print(" - klass:    "); holder_klass()->print_value_on(st); st->cr();
  72 }
  73 
  74 void CompiledICHolder::print_value_on(outputStream* st) const {
  75   st->print("%s", internal_name());
  76 }
  77 
  78 
  79 // Verification
  80 
  81 void CompiledICHolder::verify_on(outputStream* st) {
  82   guarantee(holder_metadata()->is_method() || holder_metadata()->is_klass(), "should be method or klass");
  83   guarantee(holder_klass()->is_klass(),   "should be klass");
  84 }
  85 
  86 #ifdef ASSERT
  87 
  88 void CompiledICHolder::claim() {
  89   Atomic::dec(&_live_not_claimed_count);
  90 }
  91 
  92 #endif // ASSERT