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 __