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87 lines
3.3 KiB
C++
87 lines
3.3 KiB
C++
/*
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* Copyright (c) 2019, 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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#ifndef CPU_AARCH64_SMALLREGISTERMAP_AARCH64_INLINE_HPP
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#define CPU_AARCH64_SMALLREGISTERMAP_AARCH64_INLINE_HPP
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#include "runtime/frame.inline.hpp"
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#include "runtime/registerMap.hpp"
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class SmallRegisterMap;
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// Java frames don't have callee saved registers (except for rfp), so we can use a smaller RegisterMap
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template <bool IncludeArgs>
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class SmallRegisterMapType {
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friend SmallRegisterMap;
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constexpr SmallRegisterMapType() = default;
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~SmallRegisterMapType() = default;
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NONCOPYABLE(SmallRegisterMapType);
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static void assert_is_rfp(VMReg r) NOT_DEBUG_RETURN
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DEBUG_ONLY({ assert (r == rfp->as_VMReg() || r == rfp->as_VMReg()->next(), "Reg: %s", r->name()); })
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public:
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// as_RegisterMap is used when we didn't want to templatize and abstract over RegisterMap type to support SmallRegisterMap
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// Consider enhancing SmallRegisterMap to support those cases
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const RegisterMap* as_RegisterMap() const { return nullptr; }
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RegisterMap* as_RegisterMap() { return nullptr; }
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RegisterMap* copy_to_RegisterMap(RegisterMap* map, intptr_t* sp) const {
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map->clear();
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map->set_include_argument_oops(this->include_argument_oops());
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frame::update_map_with_saved_link(map, (intptr_t**)sp - frame::sender_sp_offset);
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return map;
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}
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inline address location(VMReg reg, intptr_t* sp) const {
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assert_is_rfp(reg);
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return (address)(sp - frame::sender_sp_offset);
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}
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inline void set_location(VMReg reg, address loc) { assert_is_rfp(reg); }
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JavaThread* thread() const {
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#ifndef ASSERT
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guarantee (false, "unreachable");
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#endif
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return nullptr;
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}
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bool update_map() const { return false; }
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bool walk_cont() const { return false; }
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bool include_argument_oops() const { return IncludeArgs; }
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void set_include_argument_oops(bool f) {}
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bool in_cont() const { return false; }
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stackChunkHandle stack_chunk() const { return stackChunkHandle(); }
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#ifdef ASSERT
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bool should_skip_missing() const { return false; }
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VMReg find_register_spilled_here(void* p, intptr_t* sp) { return rfp->as_VMReg(); }
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void print() const { print_on(tty); }
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void print_on(outputStream* st) const { st->print_cr("Small register map"); }
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#endif
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};
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#endif // CPU_AARCH64_SMALLREGISTERMAP_AARCH64_INLINE_HPP
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