jdk8-mips64-public/hotspot: src/share/vm/c1/c1_CodeStubs.hpp@eef07cd490d4 (annotated)

src/share/vm/c1/c1_CodeStubs.hpp@eef07cd490d4 (annotated)

src/share/vm/c1/c1_CodeStubs.hpp

Wed, 03 Jul 2019 20:42:37 +0800

author: aoqi
date: Wed, 03 Jul 2019 20:42:37 +0800
changeset 9637: eef07cd490d4
parent 8856: ac27a9c85bea
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1999, 2016, 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.
  *
  */
 #ifndef SHARE_VM_C1_C1_CODESTUBS_HPP
 #define SHARE_VM_C1_C1_CODESTUBS_HPP
 #include "c1/c1_FrameMap.hpp"
 #include "c1/c1_IR.hpp"
 #include "c1/c1_Instruction.hpp"
 #include "c1/c1_LIR.hpp"
 #include "c1/c1_Runtime1.hpp"
 #include "utilities/array.hpp"
 #include "utilities/macros.hpp"
 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; }
   virtual bool is_simple_exception_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);
     }
   }
 };
 class CounterOverflowStub: public CodeStub {
  private:
   CodeEmitInfo* _info;
   int           _bci;
   LIR_Opr       _method;
 public:
   CounterOverflowStub(CodeEmitInfo* info, int bci, LIR_Opr method) :  _info(info), _bci(bci), _method(method) {
   }
   virtual void emit_code(LIR_Assembler* e);
   virtual void visit(LIR_OpVisitState* visitor) {
     visitor->do_slow_case(_info);
     visitor->do_input(_method);
   }
 #ifndef PRODUCT
   virtual void print_name(outputStream* out) const { out->print("CounterOverflowStub"); }
 #endif // PRODUCT
 };
 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
 };
 // stub used when predicate fails and deoptimization is needed
 class PredicateFailedStub: public CodeStub {
  private:
   CodeEmitInfo* _info;
  public:
   PredicateFailedStub(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);
   }
 #ifndef PRODUCT
   virtual void print_name(outputStream* out) const { out->print("PredicateFailedStub"); }
 #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,
     load_mirror_id,
     load_appendix_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           _index;  // index of the patchable oop or Klass* in nmethod oop or metadata 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 index = -1):
       _id(id)
     , _info(NULL)
     , _index(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 || _id == load_mirror_id || _id == load_appendix_id) {
       assert(_obj != noreg, "must have register object for load_klass/load_mirror");
 #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 bool is_simple_exception_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 SimpleExceptionStub {
  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

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/c1/c1_CodeStubs.hpp@eef07cd490d4 (annotated)

src/share/vm/c1/c1_CodeStubs.hpp