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 20; 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 __ adr(rscratch1, safepoint_pc); 48 __ str(rscratch1, Address(rthread, JavaThread::saved_exception_pc_offset())); 49 __ far_jump(callback_addr); 50 } 51 52 int C2CheckLockStackStub::max_size() const { 53 return 20; 54 } 55 56 void C2CheckLockStackStub::emit(C2_MacroAssembler& masm) { 57 __ bind(entry()); 58 assert(StubRoutines::aarch64::check_lock_stack() != NULL, "need runtime call stub"); 59 __ movptr(rscratch1, (uintptr_t) StubRoutines::aarch64::check_lock_stack()); 60 __ blr(rscratch1); 61 __ b(continuation()); 62 } 63 64 int C2HandleAnonOMOwnerStub::max_size() const { 65 return 20; 66 } 67 68 void C2HandleAnonOMOwnerStub::emit(C2_MacroAssembler& masm) { 69 __ bind(entry()); 70 Register mon = monitor(); 71 Register t = tmp(); 72 assert(t != noreg, "need tmp register"); 73 74 // Fix owner to be the current thread. 75 __ str(rthread, Address(mon, ObjectMonitor::owner_offset_in_bytes())); 76 77 // Pop owner object from lock-stack. 78 __ ldr(t, Address(rthread, JavaThread::lock_stack_current_offset())); 79 __ sub(t, t, oopSize); 80 __ str(t, Address(rthread, JavaThread::lock_stack_current_offset())); 81 82 __ b(continuation()); 83 } 84 85 int C2LoadNKlassStub::max_size() const { 86 return 8; 87 } 88 89 void C2LoadNKlassStub::emit(C2_MacroAssembler& masm) { 90 __ bind(entry()); 91 Register d = dst(); 92 __ ldr(d, Address(d, OM_OFFSET_NO_MONITOR_VALUE_TAG(header))); 93 __ b(continuation()); 94 } 95 96 97 #undef __