| /* | |
| * Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved. | |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| * | |
| * This code is free software; you can redistribute it and/or modify it | |
| * under the terms of the GNU General Public License version 2 only, as | |
| * published by the Free Software Foundation. | |
| * | |
| * This code is distributed in the hope that it will be useful, but WITHOUT | |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| * version 2 for more details (a copy is included in the LICENSE file that | |
| * accompanied this code). | |
| * | |
| * You should have received a copy of the GNU General Public License version | |
| * 2 along with this work; if not, write to the Free Software Foundation, | |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| * | |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| * or visit www.oracle.com if you need additional information or have any | |
| * questions. | |
| * | |
| */ | |
| #include "opto/c2_MacroAssembler.hpp" | |
| #include "opto/c2_CodeStubs.hpp" | |
| #include "runtime/objectMonitor.hpp" | |
| #include "runtime/sharedRuntime.hpp" | |
| #include "runtime/stubRoutines.hpp" | |
| #define __ masm. | |
| int C2SafepointPollStub::max_size() const { | |
| return 33; | |
| } | |
| void C2SafepointPollStub::emit(C2_MacroAssembler& masm) { | |
| assert(SharedRuntime::polling_page_return_handler_blob() != nullptr, | |
| "polling page return stub not created yet"); | |
| address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point(); | |
| RuntimeAddress callback_addr(stub); | |
| __ bind(entry()); | |
| InternalAddress safepoint_pc(masm.pc() - masm.offset() + _safepoint_offset); | |
| __ lea(rscratch1, safepoint_pc); | |
| __ movptr(Address(r15_thread, JavaThread::saved_exception_pc_offset()), rscratch1); | |
| __ jump(callback_addr); | |
| } | |
| int C2EntryBarrierStub::max_size() const { | |
| return 10; | |
| } | |
| void C2EntryBarrierStub::emit(C2_MacroAssembler& masm) { | |
| __ bind(entry()); | |
| __ call(RuntimeAddress(StubRoutines::method_entry_barrier())); | |
| __ jmp(continuation(), false /* maybe_short */); | |
| } | |
| int C2FastUnlockLightweightStub::max_size() const { | |
| return 128; | |
| } | |
| void C2FastUnlockLightweightStub::emit(C2_MacroAssembler& masm) { | |
| assert(_t == rax, "must be"); | |
| { // Restore lock-stack and handle the unlock in runtime. | |
| __ bind(_push_and_slow_path); | |
| #ifdef ASSERT | |
| // The obj was only cleared in debug. | |
| __ movl(_t, Address(_thread, JavaThread::lock_stack_top_offset())); | |
| __ movptr(Address(_thread, _t), _obj); | |
| #endif | |
| __ addl(Address(_thread, JavaThread::lock_stack_top_offset()), oopSize); | |
| // addl will always result in ZF = 0 (no overflows). | |
| __ jmp(slow_path_continuation()); | |
| } | |
| } | |
| #undef __ |