1 /*
   2  * Copyright (c) 1997, 2018, 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 "memory/allocation.inline.hpp"
  27 #include "oops/instanceKlass.hpp"
  28 #include "oops/method.hpp"
  29 #include "oops/oop.inline.hpp"
  30 #include "oops/valueKlass.hpp"
  31 #include "prims/privilegedStack.hpp"
  32 #include "runtime/thread.inline.hpp"
  33 #include "runtime/vframe.inline.hpp"
  34 
  35 void PrivilegedElement::initialize(vframeStream* vfst, oop context, PrivilegedElement* next, TRAPS) {
  36   Method* method        = vfst->method();
  37   _klass                = method->method_holder();
  38   _privileged_context   = context;
  39 #ifdef CHECK_UNHANDLED_OOPS
  40   THREAD->allow_unhandled_oop(&_privileged_context);
  41 #endif // CHECK_UNHANDLED_OOPS
  42   _frame_id             = vfst->frame_id();
  43   _next                 = next;
  44   assert(oopDesc::is_oop_or_null(_privileged_context), "must be an oop");
  45   assert(oopDesc::is_oop_or_null(protection_domain()), "must be an oop");
  46 }
  47 
  48 void PrivilegedElement::oops_do(OopClosure* f) {
  49   PrivilegedElement *cur = this;
  50   do {
  51     f->do_oop((oop*) &cur->_privileged_context);
  52     cur = cur->_next;
  53   } while(cur != NULL);
  54 }
  55 
  56 //-------------------------------------------------------------------------------
  57 #ifndef PRODUCT
  58 
  59 void PrivilegedElement::print_on(outputStream* st) const {
  60   st->print("   " PTR_FORMAT " ", p2i(_frame_id));
  61   _klass->print_value_on(st);
  62   if (protection_domain() != NULL) {
  63     st->print("   ");
  64     protection_domain()->print_value_on(st);
  65   }
  66   st->cr();
  67 }
  68 
  69 bool PrivilegedElement::contains(address addr) {
  70   PrivilegedElement *e = (PrivilegedElement *)addr;
  71   if (e >= this && e < this+1) return true;
  72 
  73   if (_next != NULL) {
  74     return _next->contains(addr);
  75   } else {
  76     return false;
  77   }
  78 }
  79 
  80 #endif