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view src/share/vm/c1/c1_CodeStubs.hpp @ 1721:413ad0331a0c
6977924: Changes for 6975078 produce build error with certain gcc versions
Summary: The changes introduced for 6975078 assign badHeapOopVal to the _allocation field in the ResourceObj class. In 32 bit linux builds with certain versions of gcc this assignment will be flagged as an error while compiling allocation.cpp. In 32 bit builds the constant value badHeapOopVal (which is cast to an intptr_t) is negative. The _allocation field is typed as an unsigned intptr_t and gcc catches this as an error.
Reviewed-by: jcoomes, ysr, phh
author | johnc |
---|---|
date | Wed, 18 Aug 2010 10:59:06 -0700 |
parents | 126ea7725993 |
children | d5d065957597 |
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/* * Copyright (c) 1999, 2010, 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. * */ 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 }; //------------------------------------------------------------------------------ // DeoptimizeStub // class DeoptimizeStub : public CodeStub { private: CodeEmitInfo* _info; public: DeoptimizeStub(CodeEmitInfo* info) : _info(new CodeEmitInfo(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("DeoptimizeStub"); } #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) { } void set_obj(LIR_Opr obj) { _obj = obj; } 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 }; ////////////////////////////////////////////////////////////////////////////////////////// #ifndef SERIALGC // Code stubs for Garbage-First barriers. class G1PreBarrierStub: public CodeStub { private: LIR_Opr _addr; LIR_Opr _pre_val; LIR_PatchCode _patch_code; CodeEmitInfo* _info; public: // pre_val (a temporary register) must be a register; // addr (the address of the field to be read) must be a LIR_Address G1PreBarrierStub(LIR_Opr addr, LIR_Opr pre_val, LIR_PatchCode patch_code, CodeEmitInfo* info) : _addr(addr), _pre_val(pre_val), _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"); } 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; } 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 if (_info != NULL) visitor->do_slow_case(_info); else visitor->do_slow_case(); visitor->do_input(_addr); visitor->do_temp(_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 // SERIALGC //////////////////////////////////////////////////////////////////////////////////////////