635 lines
20 KiB
C++
635 lines
20 KiB
C++
/*
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* Copyright (c) 1999, 2013, 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 SHARE_VM_C1_C1_CODESTUBS_HPP
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#define SHARE_VM_C1_C1_CODESTUBS_HPP
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#include "c1/c1_FrameMap.hpp"
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#include "c1/c1_IR.hpp"
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#include "c1/c1_Instruction.hpp"
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#include "c1/c1_LIR.hpp"
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#include "c1/c1_Runtime1.hpp"
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#include "utilities/array.hpp"
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#include "utilities/macros.hpp"
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class CodeEmitInfo;
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class LIR_Assembler;
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class LIR_OpVisitState;
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// CodeStubs are little 'out-of-line' pieces of code that
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// usually handle slow cases of operations. All code stubs
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// are collected and code is emitted at the end of the
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// nmethod.
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class CodeStub: public CompilationResourceObj {
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protected:
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Label _entry; // label at the stub entry point
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Label _continuation; // label where stub continues, if any
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public:
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CodeStub() {}
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// code generation
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void assert_no_unbound_labels() { assert(!_entry.is_unbound() && !_continuation.is_unbound(), "unbound label"); }
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virtual void emit_code(LIR_Assembler* e) = 0;
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virtual CodeEmitInfo* info() const { return NULL; }
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virtual bool is_exception_throw_stub() const { return false; }
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virtual bool is_range_check_stub() const { return false; }
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virtual bool is_divbyzero_stub() const { return false; }
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const = 0;
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#endif
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// label access
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Label* entry() { return &_entry; }
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Label* continuation() { return &_continuation; }
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// for LIR
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virtual void visit(LIR_OpVisitState* visit) {
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#ifndef PRODUCT
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if (LIRTracePeephole && Verbose) {
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tty->print("no visitor for ");
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print_name(tty);
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tty->cr();
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}
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#endif
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}
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};
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define_array(CodeStubArray, CodeStub*)
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define_stack(_CodeStubList, CodeStubArray)
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class CodeStubList: public _CodeStubList {
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public:
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CodeStubList(): _CodeStubList() {}
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void append(CodeStub* stub) {
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if (!contains(stub)) {
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_CodeStubList::append(stub);
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}
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}
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};
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class CounterOverflowStub: public CodeStub {
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private:
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CodeEmitInfo* _info;
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int _bci;
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LIR_Opr _method;
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public:
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CounterOverflowStub(CodeEmitInfo* info, int bci, LIR_Opr method) : _info(info), _bci(bci), _method(method) {
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}
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virtual void emit_code(LIR_Assembler* e);
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virtual void visit(LIR_OpVisitState* visitor) {
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visitor->do_slow_case(_info);
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visitor->do_input(_method);
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("CounterOverflowStub"); }
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#endif // PRODUCT
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};
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class ConversionStub: public CodeStub {
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private:
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Bytecodes::Code _bytecode;
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LIR_Opr _input;
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LIR_Opr _result;
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static float float_zero;
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static double double_zero;
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public:
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ConversionStub(Bytecodes::Code bytecode, LIR_Opr input, LIR_Opr result)
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: _bytecode(bytecode), _input(input), _result(result) {
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}
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Bytecodes::Code bytecode() { return _bytecode; }
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LIR_Opr input() { return _input; }
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LIR_Opr result() { return _result; }
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virtual void emit_code(LIR_Assembler* e);
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virtual void visit(LIR_OpVisitState* visitor) {
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visitor->do_slow_case();
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visitor->do_input(_input);
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visitor->do_output(_result);
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("ConversionStub"); }
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#endif // PRODUCT
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};
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// Throws ArrayIndexOutOfBoundsException by default but can be
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// configured to throw IndexOutOfBoundsException in constructor
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class RangeCheckStub: public CodeStub {
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private:
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CodeEmitInfo* _info;
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LIR_Opr _index;
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bool _throw_index_out_of_bounds_exception;
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public:
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RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, bool throw_index_out_of_bounds_exception = false);
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virtual void emit_code(LIR_Assembler* e);
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virtual CodeEmitInfo* info() const { return _info; }
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virtual bool is_exception_throw_stub() const { return true; }
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virtual bool is_range_check_stub() const { return true; }
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virtual void visit(LIR_OpVisitState* visitor) {
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visitor->do_slow_case(_info);
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visitor->do_input(_index);
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("RangeCheckStub"); }
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#endif // PRODUCT
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};
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// stub used when predicate fails and deoptimization is needed
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class PredicateFailedStub: public CodeStub {
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private:
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CodeEmitInfo* _info;
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public:
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PredicateFailedStub(CodeEmitInfo* info);
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virtual void emit_code(LIR_Assembler* e);
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virtual CodeEmitInfo* info() const { return _info; }
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virtual void visit(LIR_OpVisitState* visitor) {
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visitor->do_slow_case(_info);
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("PredicateFailedStub"); }
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#endif // PRODUCT
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};
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class DivByZeroStub: public CodeStub {
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private:
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CodeEmitInfo* _info;
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int _offset;
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public:
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DivByZeroStub(CodeEmitInfo* info)
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: _info(info), _offset(-1) {
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}
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DivByZeroStub(int offset, CodeEmitInfo* info)
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: _info(info), _offset(offset) {
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}
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virtual void emit_code(LIR_Assembler* e);
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virtual CodeEmitInfo* info() const { return _info; }
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virtual bool is_exception_throw_stub() const { return true; }
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virtual bool is_divbyzero_stub() const { return true; }
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virtual void visit(LIR_OpVisitState* visitor) {
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visitor->do_slow_case(_info);
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("DivByZeroStub"); }
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#endif // PRODUCT
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};
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class ImplicitNullCheckStub: public CodeStub {
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private:
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CodeEmitInfo* _info;
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int _offset;
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public:
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ImplicitNullCheckStub(int offset, CodeEmitInfo* info)
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: _offset(offset), _info(info) {
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}
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virtual void emit_code(LIR_Assembler* e);
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virtual CodeEmitInfo* info() const { return _info; }
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virtual bool is_exception_throw_stub() const { return true; }
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virtual void visit(LIR_OpVisitState* visitor) {
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visitor->do_slow_case(_info);
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("ImplicitNullCheckStub"); }
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#endif // PRODUCT
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};
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class NewInstanceStub: public CodeStub {
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private:
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ciInstanceKlass* _klass;
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LIR_Opr _klass_reg;
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LIR_Opr _result;
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CodeEmitInfo* _info;
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Runtime1::StubID _stub_id;
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public:
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NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id);
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virtual void emit_code(LIR_Assembler* e);
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virtual CodeEmitInfo* info() const { return _info; }
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virtual void visit(LIR_OpVisitState* visitor) {
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visitor->do_slow_case(_info);
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visitor->do_input(_klass_reg);
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visitor->do_output(_result);
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("NewInstanceStub"); }
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#endif // PRODUCT
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};
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class NewTypeArrayStub: public CodeStub {
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private:
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LIR_Opr _klass_reg;
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LIR_Opr _length;
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LIR_Opr _result;
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CodeEmitInfo* _info;
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public:
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NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info);
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virtual void emit_code(LIR_Assembler* e);
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virtual CodeEmitInfo* info() const { return _info; }
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virtual void visit(LIR_OpVisitState* visitor) {
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visitor->do_slow_case(_info);
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visitor->do_input(_klass_reg);
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visitor->do_input(_length);
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assert(_result->is_valid(), "must be valid"); visitor->do_output(_result);
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("NewTypeArrayStub"); }
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#endif // PRODUCT
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};
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class NewObjectArrayStub: public CodeStub {
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private:
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LIR_Opr _klass_reg;
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LIR_Opr _length;
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LIR_Opr _result;
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CodeEmitInfo* _info;
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public:
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NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info);
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virtual void emit_code(LIR_Assembler* e);
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virtual CodeEmitInfo* info() const { return _info; }
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virtual void visit(LIR_OpVisitState* visitor) {
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visitor->do_slow_case(_info);
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visitor->do_input(_klass_reg);
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visitor->do_input(_length);
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assert(_result->is_valid(), "must be valid"); visitor->do_output(_result);
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("NewObjectArrayStub"); }
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#endif // PRODUCT
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};
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class MonitorAccessStub: public CodeStub {
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protected:
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LIR_Opr _obj_reg;
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LIR_Opr _lock_reg;
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public:
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MonitorAccessStub(LIR_Opr obj_reg, LIR_Opr lock_reg) {
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_obj_reg = obj_reg;
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_lock_reg = lock_reg;
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("MonitorAccessStub"); }
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#endif // PRODUCT
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};
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class MonitorEnterStub: public MonitorAccessStub {
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private:
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CodeEmitInfo* _info;
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public:
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MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info);
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virtual void emit_code(LIR_Assembler* e);
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virtual CodeEmitInfo* info() const { return _info; }
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virtual void visit(LIR_OpVisitState* visitor) {
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visitor->do_input(_obj_reg);
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visitor->do_input(_lock_reg);
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visitor->do_slow_case(_info);
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("MonitorEnterStub"); }
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#endif // PRODUCT
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};
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class MonitorExitStub: public MonitorAccessStub {
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private:
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bool _compute_lock;
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int _monitor_ix;
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public:
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MonitorExitStub(LIR_Opr lock_reg, bool compute_lock, int monitor_ix)
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: MonitorAccessStub(LIR_OprFact::illegalOpr, lock_reg),
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_compute_lock(compute_lock), _monitor_ix(monitor_ix) { }
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virtual void emit_code(LIR_Assembler* e);
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virtual void visit(LIR_OpVisitState* visitor) {
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assert(_obj_reg->is_illegal(), "unused");
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if (_compute_lock) {
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visitor->do_temp(_lock_reg);
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} else {
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visitor->do_input(_lock_reg);
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}
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("MonitorExitStub"); }
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#endif // PRODUCT
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};
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class PatchingStub: public CodeStub {
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public:
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enum PatchID {
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access_field_id,
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load_klass_id,
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load_mirror_id,
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load_appendix_id
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};
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enum constants {
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patch_info_size = 3
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};
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private:
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PatchID _id;
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address _pc_start;
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int _bytes_to_copy;
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Label _patched_code_entry;
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Label _patch_site_entry;
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Label _patch_site_continuation;
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Register _obj;
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CodeEmitInfo* _info;
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int _index; // index of the patchable oop or Klass* in nmethod oop or metadata table if needed
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static int _patch_info_offset;
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void align_patch_site(MacroAssembler* masm);
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public:
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static int patch_info_offset() { return _patch_info_offset; }
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PatchingStub(MacroAssembler* masm, PatchID id, int index = -1):
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_id(id)
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, _info(NULL)
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, _index(index) {
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if (os::is_MP()) {
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// force alignment of patch sites on MP hardware so we
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// can guarantee atomic writes to the patch site.
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align_patch_site(masm);
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}
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_pc_start = masm->pc();
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masm->bind(_patch_site_entry);
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}
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void install(MacroAssembler* masm, LIR_PatchCode patch_code, Register obj, CodeEmitInfo* info) {
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_info = info;
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_obj = obj;
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masm->bind(_patch_site_continuation);
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_bytes_to_copy = masm->pc() - pc_start();
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if (_id == PatchingStub::access_field_id) {
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// embed a fixed offset to handle long patches which need to be offset by a word.
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// the patching code will just add the field offset field to this offset so
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// that we can refernce either the high or low word of a double word field.
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int field_offset = 0;
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switch (patch_code) {
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case lir_patch_low: field_offset = lo_word_offset_in_bytes; break;
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case lir_patch_high: field_offset = hi_word_offset_in_bytes; break;
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case lir_patch_normal: field_offset = 0; break;
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default: ShouldNotReachHere();
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}
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NativeMovRegMem* n_move = nativeMovRegMem_at(pc_start());
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n_move->set_offset(field_offset);
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} else if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) {
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assert(_obj != noreg, "must have register object for load_klass/load_mirror");
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#ifdef ASSERT
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// verify that we're pointing at a NativeMovConstReg
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nativeMovConstReg_at(pc_start());
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#endif
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} else {
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ShouldNotReachHere();
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}
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assert(_bytes_to_copy <= (masm->pc() - pc_start()), "not enough bytes");
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}
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address pc_start() const { return _pc_start; }
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PatchID id() const { return _id; }
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virtual void emit_code(LIR_Assembler* e);
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virtual CodeEmitInfo* info() const { return _info; }
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virtual void visit(LIR_OpVisitState* visitor) {
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visitor->do_slow_case(_info);
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("PatchingStub"); }
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#endif // PRODUCT
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};
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//------------------------------------------------------------------------------
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// DeoptimizeStub
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//
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class DeoptimizeStub : public CodeStub {
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private:
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CodeEmitInfo* _info;
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jint _trap_request;
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public:
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DeoptimizeStub(CodeEmitInfo* info, Deoptimization::DeoptReason reason, Deoptimization::DeoptAction action) :
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_info(new CodeEmitInfo(info)), _trap_request(Deoptimization::make_trap_request(reason, action)) {}
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virtual void emit_code(LIR_Assembler* e);
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virtual CodeEmitInfo* info() const { return _info; }
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virtual bool is_exception_throw_stub() const { return true; }
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virtual void visit(LIR_OpVisitState* visitor) {
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visitor->do_slow_case(_info);
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("DeoptimizeStub"); }
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#endif // PRODUCT
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};
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class SimpleExceptionStub: public CodeStub {
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private:
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LIR_Opr _obj;
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Runtime1::StubID _stub;
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CodeEmitInfo* _info;
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public:
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SimpleExceptionStub(Runtime1::StubID stub, LIR_Opr obj, CodeEmitInfo* info):
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_obj(obj), _info(info), _stub(stub) {
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}
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void set_obj(LIR_Opr obj) {
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_obj = obj;
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}
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virtual void emit_code(LIR_Assembler* e);
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virtual CodeEmitInfo* info() const { return _info; }
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virtual bool is_exception_throw_stub() const { return true; }
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virtual void visit(LIR_OpVisitState* visitor) {
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if (_obj->is_valid()) visitor->do_input(_obj);
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visitor->do_slow_case(_info);
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("SimpleExceptionStub"); }
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#endif // PRODUCT
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};
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class ArrayStoreExceptionStub: public SimpleExceptionStub {
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private:
|
|
CodeEmitInfo* _info;
|
|
|
|
public:
|
|
ArrayStoreExceptionStub(LIR_Opr obj, CodeEmitInfo* info): SimpleExceptionStub(Runtime1::throw_array_store_exception_id, obj, info) {}
|
|
#ifndef PRODUCT
|
|
virtual void print_name(outputStream* out) const { out->print("ArrayStoreExceptionStub"); }
|
|
#endif // PRODUCT
|
|
};
|
|
|
|
|
|
class ArrayCopyStub: public CodeStub {
|
|
private:
|
|
LIR_OpArrayCopy* _op;
|
|
|
|
public:
|
|
ArrayCopyStub(LIR_OpArrayCopy* op): _op(op) { }
|
|
|
|
LIR_Opr src() const { return _op->src(); }
|
|
LIR_Opr src_pos() const { return _op->src_pos(); }
|
|
LIR_Opr dst() const { return _op->dst(); }
|
|
LIR_Opr dst_pos() const { return _op->dst_pos(); }
|
|
LIR_Opr length() const { return _op->length(); }
|
|
LIR_Opr tmp() const { return _op->tmp(); }
|
|
|
|
virtual void emit_code(LIR_Assembler* e);
|
|
virtual CodeEmitInfo* info() const { return _op->info(); }
|
|
virtual void visit(LIR_OpVisitState* visitor) {
|
|
// don't pass in the code emit info since it's processed in the fast path
|
|
visitor->do_slow_case();
|
|
}
|
|
#ifndef PRODUCT
|
|
virtual void print_name(outputStream* out) const { out->print("ArrayCopyStub"); }
|
|
#endif // PRODUCT
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
#if INCLUDE_ALL_GCS
|
|
|
|
// Code stubs for Garbage-First barriers.
|
|
class G1PreBarrierStub: public CodeStub {
|
|
private:
|
|
bool _do_load;
|
|
LIR_Opr _addr;
|
|
LIR_Opr _pre_val;
|
|
LIR_PatchCode _patch_code;
|
|
CodeEmitInfo* _info;
|
|
|
|
public:
|
|
// Version that _does_ generate a load of the previous value from addr.
|
|
// addr (the address of the field to be read) must be a LIR_Address
|
|
// pre_val (a temporary register) must be a register;
|
|
G1PreBarrierStub(LIR_Opr addr, LIR_Opr pre_val, LIR_PatchCode patch_code, CodeEmitInfo* info) :
|
|
_addr(addr), _pre_val(pre_val), _do_load(true),
|
|
_patch_code(patch_code), _info(info)
|
|
{
|
|
assert(_pre_val->is_register(), "should be temporary register");
|
|
assert(_addr->is_address(), "should be the address of the field");
|
|
}
|
|
|
|
// Version that _does not_ generate load of the previous value; the
|
|
// previous value is assumed to have already been loaded into pre_val.
|
|
G1PreBarrierStub(LIR_Opr pre_val) :
|
|
_addr(LIR_OprFact::illegalOpr), _pre_val(pre_val), _do_load(false),
|
|
_patch_code(lir_patch_none), _info(NULL)
|
|
{
|
|
assert(_pre_val->is_register(), "should be a register");
|
|
}
|
|
|
|
LIR_Opr addr() const { return _addr; }
|
|
LIR_Opr pre_val() const { return _pre_val; }
|
|
LIR_PatchCode patch_code() const { return _patch_code; }
|
|
CodeEmitInfo* info() const { return _info; }
|
|
bool do_load() const { return _do_load; }
|
|
|
|
virtual void emit_code(LIR_Assembler* e);
|
|
virtual void visit(LIR_OpVisitState* visitor) {
|
|
if (_do_load) {
|
|
// don't pass in the code emit info since it's processed in the fast
|
|
// path
|
|
if (_info != NULL)
|
|
visitor->do_slow_case(_info);
|
|
else
|
|
visitor->do_slow_case();
|
|
|
|
visitor->do_input(_addr);
|
|
visitor->do_temp(_pre_val);
|
|
} else {
|
|
visitor->do_slow_case();
|
|
visitor->do_input(_pre_val);
|
|
}
|
|
}
|
|
#ifndef PRODUCT
|
|
virtual void print_name(outputStream* out) const { out->print("G1PreBarrierStub"); }
|
|
#endif // PRODUCT
|
|
};
|
|
|
|
class G1PostBarrierStub: public CodeStub {
|
|
private:
|
|
LIR_Opr _addr;
|
|
LIR_Opr _new_val;
|
|
|
|
static jbyte* _byte_map_base;
|
|
static jbyte* byte_map_base_slow();
|
|
static jbyte* byte_map_base() {
|
|
if (_byte_map_base == NULL) {
|
|
_byte_map_base = byte_map_base_slow();
|
|
}
|
|
return _byte_map_base;
|
|
}
|
|
|
|
public:
|
|
// addr (the address of the object head) and new_val must be registers.
|
|
G1PostBarrierStub(LIR_Opr addr, LIR_Opr new_val): _addr(addr), _new_val(new_val) { }
|
|
|
|
LIR_Opr addr() const { return _addr; }
|
|
LIR_Opr new_val() const { return _new_val; }
|
|
|
|
virtual void emit_code(LIR_Assembler* e);
|
|
virtual void visit(LIR_OpVisitState* visitor) {
|
|
// don't pass in the code emit info since it's processed in the fast path
|
|
visitor->do_slow_case();
|
|
visitor->do_input(_addr);
|
|
visitor->do_input(_new_val);
|
|
}
|
|
#ifndef PRODUCT
|
|
virtual void print_name(outputStream* out) const { out->print("G1PostBarrierStub"); }
|
|
#endif // PRODUCT
|
|
};
|
|
|
|
#endif // INCLUDE_ALL_GCS
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#endif // SHARE_VM_C1_C1_CODESTUBS_HPP
|