1 /*
2 * Copyright (c) 2020, 2022 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 "opto/c2_MacroAssembler.hpp"
27 #include "opto/c2_CodeStubs.hpp"
28 #include "runtime/objectMonitor.hpp"
29 #include "runtime/sharedRuntime.hpp"
30 #include "runtime/stubRoutines.hpp"
31
32 #define __ masm.
33
34 int C2SafepointPollStub::max_size() const {
35 return 33;
36 }
37
38 void C2SafepointPollStub::emit(C2_MacroAssembler& masm) {
39 assert(SharedRuntime::polling_page_return_handler_blob() != NULL,
40 "polling page return stub not created yet");
41 address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point();
42
43 RuntimeAddress callback_addr(stub);
44
45 __ bind(entry());
46 InternalAddress safepoint_pc(masm.pc() - masm.offset() + _safepoint_offset);
47 #ifdef _LP64
48 __ lea(rscratch1, safepoint_pc);
49 __ movptr(Address(r15_thread, JavaThread::saved_exception_pc_offset()), rscratch1);
50 #else
51 const Register tmp1 = rcx;
52 const Register tmp2 = rdx;
53 __ push(tmp1);
54 __ push(tmp2);
55
56 __ lea(tmp1, safepoint_pc);
57 __ get_thread(tmp2);
58 __ movptr(Address(tmp2, JavaThread::saved_exception_pc_offset()), tmp1);
59
60 __ pop(tmp2);
61 __ pop(tmp1);
62 #endif
63 __ jump(callback_addr);
64 }
65
66 #ifdef _LP64
67 int C2HandleAnonOMOwnerStub::max_size() const {
68 // Max size of stub has been determined by testing with 0, in which case
69 // C2CodeStubList::emit() will throw an assertion and report the actual size that
70 // is needed.
71 return DEBUG_ONLY(36) NOT_DEBUG(21);
72 }
73
74 void C2HandleAnonOMOwnerStub::emit(C2_MacroAssembler& masm) {
75 __ bind(entry());
76 Register mon = monitor();
77 Register t = tmp();
78 __ movptr(Address(mon, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), r15_thread);
79 __ subl(Address(r15_thread, JavaThread::lock_stack_top_offset()), oopSize);
80 #ifdef ASSERT
81 __ movl(t, Address(r15_thread, JavaThread::lock_stack_top_offset()));
82 __ movptr(Address(r15_thread, t), 0);
83 #endif
84 __ jmp(continuation());
85 }
86
87 int C2LoadNKlassStub::max_size() const {
88 return 10;
89 }
90
91 void C2LoadNKlassStub::emit(C2_MacroAssembler& masm) {
92 __ bind(entry());
93 Register d = dst();
94 __ movq(d, Address(d, OM_OFFSET_NO_MONITOR_VALUE_TAG(header)));
95 __ jmp(continuation());
96 }
97 #endif
98
99 #undef __