Mercurial > hg > truffle
diff src/share/vm/c1/c1_CodeStubs.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | 37f87013dfd8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/c1/c1_CodeStubs.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,484 @@ +/* + * Copyright 1999-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +class CodeEmitInfo; +class LIR_Assembler; +class LIR_OpVisitState; + +// CodeStubs are little 'out-of-line' pieces of code that +// usually handle slow cases of operations. All code stubs +// are collected and code is emitted at the end of the +// nmethod. + +class CodeStub: public CompilationResourceObj { + protected: + Label _entry; // label at the stub entry point + Label _continuation; // label where stub continues, if any + + public: + CodeStub() {} + + // code generation + void assert_no_unbound_labels() { assert(!_entry.is_unbound() && !_continuation.is_unbound(), "unbound label"); } + virtual void emit_code(LIR_Assembler* e) = 0; + virtual CodeEmitInfo* info() const { return NULL; } + virtual bool is_exception_throw_stub() const { return false; } + virtual bool is_range_check_stub() const { return false; } + virtual bool is_divbyzero_stub() const { return false; } +#ifndef PRODUCT + virtual void print_name(outputStream* out) const = 0; +#endif + + // label access + Label* entry() { return &_entry; } + Label* continuation() { return &_continuation; } + // for LIR + virtual void visit(LIR_OpVisitState* visit) { +#ifndef PRODUCT + if (LIRTracePeephole && Verbose) { + tty->print("no visitor for "); + print_name(tty); + tty->cr(); + } +#endif + } +}; + + +define_array(CodeStubArray, CodeStub*) +define_stack(_CodeStubList, CodeStubArray) + +class CodeStubList: public _CodeStubList { + public: + CodeStubList(): _CodeStubList() {} + + void append(CodeStub* stub) { + if (!contains(stub)) { + _CodeStubList::append(stub); + } + } +}; + +#ifdef TIERED +class CounterOverflowStub: public CodeStub { + private: + CodeEmitInfo* _info; + int _bci; + +public: + CounterOverflowStub(CodeEmitInfo* info, int bci) : _info(info), _bci(bci) { + } + + virtual void emit_code(LIR_Assembler* e); + + virtual void visit(LIR_OpVisitState* visitor) { + visitor->do_slow_case(_info); + } + +#ifndef PRODUCT + virtual void print_name(outputStream* out) const { out->print("CounterOverflowStub"); } +#endif // PRODUCT + +}; +#endif // TIERED + +class ConversionStub: public CodeStub { + private: + Bytecodes::Code _bytecode; + LIR_Opr _input; + LIR_Opr _result; + + static float float_zero; + static double double_zero; + public: + ConversionStub(Bytecodes::Code bytecode, LIR_Opr input, LIR_Opr result) + : _bytecode(bytecode), _input(input), _result(result) { + } + + Bytecodes::Code bytecode() { return _bytecode; } + LIR_Opr input() { return _input; } + LIR_Opr result() { return _result; } + + virtual void emit_code(LIR_Assembler* e); + virtual void visit(LIR_OpVisitState* visitor) { + visitor->do_slow_case(); + visitor->do_input(_input); + visitor->do_output(_result); + } +#ifndef PRODUCT + virtual void print_name(outputStream* out) const { out->print("ConversionStub"); } +#endif // PRODUCT +}; + + +// Throws ArrayIndexOutOfBoundsException by default but can be +// configured to throw IndexOutOfBoundsException in constructor +class RangeCheckStub: public CodeStub { + private: + CodeEmitInfo* _info; + LIR_Opr _index; + bool _throw_index_out_of_bounds_exception; + + public: + RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, bool throw_index_out_of_bounds_exception = false); + virtual void emit_code(LIR_Assembler* e); + virtual CodeEmitInfo* info() const { return _info; } + virtual bool is_exception_throw_stub() const { return true; } + virtual bool is_range_check_stub() const { return true; } + virtual void visit(LIR_OpVisitState* visitor) { + visitor->do_slow_case(_info); + visitor->do_input(_index); + } +#ifndef PRODUCT + virtual void print_name(outputStream* out) const { out->print("RangeCheckStub"); } +#endif // PRODUCT +}; + + +class DivByZeroStub: public CodeStub { + private: + CodeEmitInfo* _info; + int _offset; + + public: + DivByZeroStub(CodeEmitInfo* info) + : _info(info), _offset(-1) { + } + DivByZeroStub(int offset, CodeEmitInfo* info) + : _info(info), _offset(offset) { + } + virtual void emit_code(LIR_Assembler* e); + virtual CodeEmitInfo* info() const { return _info; } + virtual bool is_exception_throw_stub() const { return true; } + virtual bool is_divbyzero_stub() const { return true; } + virtual void visit(LIR_OpVisitState* visitor) { + visitor->do_slow_case(_info); + } +#ifndef PRODUCT + virtual void print_name(outputStream* out) const { out->print("DivByZeroStub"); } +#endif // PRODUCT +}; + + +class ImplicitNullCheckStub: public CodeStub { + private: + CodeEmitInfo* _info; + int _offset; + + public: + ImplicitNullCheckStub(int offset, CodeEmitInfo* info) + : _offset(offset), _info(info) { + } + virtual void emit_code(LIR_Assembler* e); + virtual CodeEmitInfo* info() const { return _info; } + virtual bool is_exception_throw_stub() const { return true; } + virtual void visit(LIR_OpVisitState* visitor) { + visitor->do_slow_case(_info); + } +#ifndef PRODUCT + virtual void print_name(outputStream* out) const { out->print("ImplicitNullCheckStub"); } +#endif // PRODUCT +}; + + +class NewInstanceStub: public CodeStub { + private: + ciInstanceKlass* _klass; + LIR_Opr _klass_reg; + LIR_Opr _result; + CodeEmitInfo* _info; + Runtime1::StubID _stub_id; + + public: + NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id); + virtual void emit_code(LIR_Assembler* e); + virtual CodeEmitInfo* info() const { return _info; } + virtual void visit(LIR_OpVisitState* visitor) { + visitor->do_slow_case(_info); + visitor->do_input(_klass_reg); + visitor->do_output(_result); + } +#ifndef PRODUCT + virtual void print_name(outputStream* out) const { out->print("NewInstanceStub"); } +#endif // PRODUCT +}; + + +class NewTypeArrayStub: public CodeStub { + private: + LIR_Opr _klass_reg; + LIR_Opr _length; + LIR_Opr _result; + CodeEmitInfo* _info; + + public: + NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info); + virtual void emit_code(LIR_Assembler* e); + virtual CodeEmitInfo* info() const { return _info; } + virtual void visit(LIR_OpVisitState* visitor) { + visitor->do_slow_case(_info); + visitor->do_input(_klass_reg); + visitor->do_input(_length); + assert(_result->is_valid(), "must be valid"); visitor->do_output(_result); + } +#ifndef PRODUCT + virtual void print_name(outputStream* out) const { out->print("NewTypeArrayStub"); } +#endif // PRODUCT +}; + + +class NewObjectArrayStub: public CodeStub { + private: + LIR_Opr _klass_reg; + LIR_Opr _length; + LIR_Opr _result; + CodeEmitInfo* _info; + + public: + NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info); + virtual void emit_code(LIR_Assembler* e); + virtual CodeEmitInfo* info() const { return _info; } + virtual void visit(LIR_OpVisitState* visitor) { + visitor->do_slow_case(_info); + visitor->do_input(_klass_reg); + visitor->do_input(_length); + assert(_result->is_valid(), "must be valid"); visitor->do_output(_result); + } +#ifndef PRODUCT + virtual void print_name(outputStream* out) const { out->print("NewObjectArrayStub"); } +#endif // PRODUCT +}; + + +class MonitorAccessStub: public CodeStub { + protected: + LIR_Opr _obj_reg; + LIR_Opr _lock_reg; + + public: + MonitorAccessStub(LIR_Opr obj_reg, LIR_Opr lock_reg) { + _obj_reg = obj_reg; + _lock_reg = lock_reg; + } + +#ifndef PRODUCT + virtual void print_name(outputStream* out) const { out->print("MonitorAccessStub"); } +#endif // PRODUCT +}; + + +class MonitorEnterStub: public MonitorAccessStub { + private: + CodeEmitInfo* _info; + + public: + MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info); + + virtual void emit_code(LIR_Assembler* e); + virtual CodeEmitInfo* info() const { return _info; } + virtual void visit(LIR_OpVisitState* visitor) { + visitor->do_input(_obj_reg); + visitor->do_input(_lock_reg); + visitor->do_slow_case(_info); + } +#ifndef PRODUCT + virtual void print_name(outputStream* out) const { out->print("MonitorEnterStub"); } +#endif // PRODUCT +}; + + +class MonitorExitStub: public MonitorAccessStub { + private: + bool _compute_lock; + int _monitor_ix; + + public: + MonitorExitStub(LIR_Opr lock_reg, bool compute_lock, int monitor_ix) + : MonitorAccessStub(LIR_OprFact::illegalOpr, lock_reg), + _compute_lock(compute_lock), _monitor_ix(monitor_ix) { } + virtual void emit_code(LIR_Assembler* e); + virtual void visit(LIR_OpVisitState* visitor) { + assert(_obj_reg->is_illegal(), "unused"); + if (_compute_lock) { + visitor->do_temp(_lock_reg); + } else { + visitor->do_input(_lock_reg); + } + } +#ifndef PRODUCT + virtual void print_name(outputStream* out) const { out->print("MonitorExitStub"); } +#endif // PRODUCT +}; + + +class PatchingStub: public CodeStub { + public: + enum PatchID { + access_field_id, + load_klass_id + }; + enum constants { + patch_info_size = 3 + }; + private: + PatchID _id; + address _pc_start; + int _bytes_to_copy; + Label _patched_code_entry; + Label _patch_site_entry; + Label _patch_site_continuation; + Register _obj; + CodeEmitInfo* _info; + int _oop_index; // index of the patchable oop in nmethod oop table if needed + static int _patch_info_offset; + + void align_patch_site(MacroAssembler* masm); + + public: + static int patch_info_offset() { return _patch_info_offset; } + + PatchingStub(MacroAssembler* masm, PatchID id, int oop_index = -1): + _id(id) + , _info(NULL) + , _oop_index(oop_index) { + if (os::is_MP()) { + // force alignment of patch sites on MP hardware so we + // can guarantee atomic writes to the patch site. + align_patch_site(masm); + } + _pc_start = masm->pc(); + masm->bind(_patch_site_entry); + } + + void install(MacroAssembler* masm, LIR_PatchCode patch_code, Register obj, CodeEmitInfo* info) { + _info = info; + _obj = obj; + masm->bind(_patch_site_continuation); + _bytes_to_copy = masm->pc() - pc_start(); + if (_id == PatchingStub::access_field_id) { + // embed a fixed offset to handle long patches which need to be offset by a word. + // the patching code will just add the field offset field to this offset so + // that we can refernce either the high or low word of a double word field. + int field_offset = 0; + switch (patch_code) { + case lir_patch_low: field_offset = lo_word_offset_in_bytes; break; + case lir_patch_high: field_offset = hi_word_offset_in_bytes; break; + case lir_patch_normal: field_offset = 0; break; + default: ShouldNotReachHere(); + } + NativeMovRegMem* n_move = nativeMovRegMem_at(pc_start()); + n_move->set_offset(field_offset); + } else if (_id == load_klass_id) { + assert(_obj != noreg, "must have register object for load_klass"); +#ifdef ASSERT + // verify that we're pointing at a NativeMovConstReg + nativeMovConstReg_at(pc_start()); +#endif + } else { + ShouldNotReachHere(); + } + assert(_bytes_to_copy <= (masm->pc() - pc_start()), "not enough bytes"); + } + + address pc_start() const { return _pc_start; } + PatchID id() const { return _id; } + + virtual void emit_code(LIR_Assembler* e); + virtual CodeEmitInfo* info() const { return _info; } + virtual void visit(LIR_OpVisitState* visitor) { + visitor->do_slow_case(_info); + } +#ifndef PRODUCT + virtual void print_name(outputStream* out) const { out->print("PatchingStub"); } +#endif // PRODUCT +}; + + +class SimpleExceptionStub: public CodeStub { + private: + LIR_Opr _obj; + Runtime1::StubID _stub; + CodeEmitInfo* _info; + + public: + SimpleExceptionStub(Runtime1::StubID stub, LIR_Opr obj, CodeEmitInfo* info): + _obj(obj), _info(info), _stub(stub) { + } + + virtual void emit_code(LIR_Assembler* e); + virtual CodeEmitInfo* info() const { return _info; } + virtual bool is_exception_throw_stub() const { return true; } + virtual void visit(LIR_OpVisitState* visitor) { + if (_obj->is_valid()) visitor->do_input(_obj); + visitor->do_slow_case(_info); + } +#ifndef PRODUCT + virtual void print_name(outputStream* out) const { out->print("SimpleExceptionStub"); } +#endif // PRODUCT +}; + + + +class ArrayStoreExceptionStub: public CodeStub { + private: + CodeEmitInfo* _info; + + public: + ArrayStoreExceptionStub(CodeEmitInfo* info); + virtual void emit_code(LIR_Assembler* emit); + virtual CodeEmitInfo* info() const { return _info; } + virtual bool is_exception_throw_stub() const { return true; } + virtual void visit(LIR_OpVisitState* visitor) { + visitor->do_slow_case(_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 +};