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 BufferedValuesDealiaser* dealiaser = NULL;
51 do {
52 if (!VTBuffer::is_in_vt_buffer(cur->_privileged_context)) {
53 f->do_oop((oop*) &cur->_privileged_context);
54 } else {
55 if (dealiaser == NULL) {
56 dealiaser = Thread::current()->buffered_values_dealiaser();
57 }
58 oop value = *(oop*) &cur->_privileged_context;
59 assert(value->is_value(), "Sanity check");
60 dealiaser->oops_do(f, value);
61 }
62 cur = cur->_next;
63 } while(cur != NULL);
64 }
65
66 //-------------------------------------------------------------------------------
67 #ifndef PRODUCT
68
69 void PrivilegedElement::print_on(outputStream* st) const {
70 st->print(" " PTR_FORMAT " ", p2i(_frame_id));
71 _klass->print_value_on(st);
72 if (protection_domain() != NULL) {
73 st->print(" ");
74 protection_domain()->print_value_on(st);
75 }
76 st->cr();
77 }
78
79 bool PrivilegedElement::contains(address addr) {
80 PrivilegedElement *e = (PrivilegedElement *)addr;
81 if (e >= this && e < this+1) return true;
82
83 if (_next != NULL) {
84 return _next->contains(addr);
85 } else {
86 return false;
87 }
88 }
89
90 #endif