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83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
/*
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* Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "opto/c2_MacroAssembler.hpp"
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#include "opto/c2_CodeStubs.hpp"
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#include "runtime/objectMonitor.hpp"
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#include "runtime/sharedRuntime.hpp"
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#include "runtime/stubRoutines.hpp"
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#define __ masm.
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int C2SafepointPollStub::max_size() const {
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return 33;
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}
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void C2SafepointPollStub::emit(C2_MacroAssembler& masm) {
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assert(SharedRuntime::polling_page_return_handler_blob() != nullptr,
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"polling page return stub not created yet");
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address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point();
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RuntimeAddress callback_addr(stub);
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__ bind(entry());
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InternalAddress safepoint_pc(masm.pc() - masm.offset() + _safepoint_offset);
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__ lea(rscratch1, safepoint_pc);
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__ movptr(Address(r15_thread, JavaThread::saved_exception_pc_offset()), rscratch1);
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__ jump(callback_addr);
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}
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int C2EntryBarrierStub::max_size() const {
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return 10;
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}
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void C2EntryBarrierStub::emit(C2_MacroAssembler& masm) {
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__ bind(entry());
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__ call(RuntimeAddress(StubRoutines::method_entry_barrier()));
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__ jmp(continuation(), false /* maybe_short */);
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}
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int C2FastUnlockStub::max_size() const {
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return 128;
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}
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void C2FastUnlockStub::emit(C2_MacroAssembler& masm) {
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assert(_t == rax, "must be");
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{ // Restore lock-stack and handle the unlock in runtime.
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__ bind(_push_and_slow_path);
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#ifdef ASSERT
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// The obj was only cleared in debug.
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__ movl(_t, Address(_thread, JavaThread::lock_stack_top_offset()));
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__ movptr(Address(_thread, _t), _obj);
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#endif
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__ addl(Address(_thread, JavaThread::lock_stack_top_offset()), oopSize);
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// addl will always result in ZF = 0 (no overflows).
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__ jmp(slow_path_continuation());
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}
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}
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#undef __
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