jdk8-mips64-public/hotspot: src/share/vm/code/codeBlob.hpp@e9ff18c4ace7

     1 /*

     2  * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 // CodeBlob - superclass for all entries in the CodeCache.

    26 //

    27 // Suptypes are:

    28 //   nmethod            : Compiled Java methods (include method that calls to native code)

    29 //   RuntimeStub        : Call to VM runtime methods

    30 //   DeoptimizationBlob : Used for deoptimizatation

    31 //   ExceptionBlob      : Used for stack unrolling

    32 //   SafepointBlob      : Used to handle illegal instruction exceptions

    33 //

    34 //

    35 // Layout:

    36 //   - header

    37 //   - relocation

    38 //   - instruction space

    39 //   - data space

    40 class DeoptimizationBlob;

    42 class CodeBlob VALUE_OBJ_CLASS_SPEC {

    44   friend class VMStructs;

    46  private:

    47   const char* _name;

    48   int        _size;                              // total size of CodeBlob in bytes

    49   int        _header_size;                       // size of header (depends on subclass)

    50   int        _relocation_size;                   // size of relocation

    51   int        _instructions_offset;               // offset to where instructions region begins

    52   int        _frame_complete_offset;             // instruction offsets in [0.._frame_complete_offset) have

    53                                                  // not finished setting up their frame. Beware of pc's in

    54                                                  // that range. There is a similar range(s) on returns

    55                                                  // which we don't detect.

    56   int        _data_offset;                       // offset to where data region begins

    57   int        _frame_size;                        // size of stack frame

    58   OopMapSet* _oop_maps;                          // OopMap for this CodeBlob

    59   CodeComments _comments;

    61   friend class OopRecorder;

    63  public:

    64   // Returns the space needed for CodeBlob

    65   static unsigned int allocation_size(CodeBuffer* cb, int header_size);

    67   // Creation

    68   // a) simple CodeBlob

    69   // frame_complete is the offset from the beginning of the instructions

    70   // to where the frame setup (from stackwalk viewpoint) is complete.

    71   CodeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size);

    73   // b) full CodeBlob

    74   CodeBlob(

    75     const char* name,

    76     CodeBuffer* cb,

    77     int         header_size,

    78     int         size,

    79     int         frame_complete,

    80     int         frame_size,

    81     OopMapSet*  oop_maps

    82   );

    84   // Deletion

    85   void flush();

    87   // Typing

    88   virtual bool is_buffer_blob() const                 { return false; }

    89   virtual bool is_nmethod() const                     { return false; }

    90   virtual bool is_runtime_stub() const                { return false; }

    91   virtual bool is_deoptimization_stub() const         { return false; }

    92   virtual bool is_uncommon_trap_stub() const          { return false; }

    93   virtual bool is_exception_stub() const              { return false; }

    94   virtual bool is_safepoint_stub() const              { return false; }

    95   virtual bool is_adapter_blob() const                { return false; }

    96   virtual bool is_method_handles_adapter_blob() const { return false; }

    98   virtual bool is_compiled_by_c2() const         { return false; }

    99   virtual bool is_compiled_by_c1() const         { return false; }

   101   // Casting

   102   nmethod* as_nmethod_or_null()                  { return is_nmethod() ? (nmethod*) this : NULL; }

   104   // Boundaries

   105   address    header_begin() const                { return (address)    this; }

   106   address    header_end() const                  { return ((address)   this) + _header_size; };

   107   relocInfo* relocation_begin() const            { return (relocInfo*) header_end(); };

   108   relocInfo* relocation_end() const              { return (relocInfo*)(header_end()   + _relocation_size); }

   109   address    instructions_begin() const          { return (address)    header_begin() + _instructions_offset;  }

   110   address    instructions_end() const            { return (address)    header_begin() + _data_offset; }

   111   address    data_begin() const                  { return (address)    header_begin() + _data_offset; }

   112   address    data_end() const                    { return (address)    header_begin() + _size; }

   114   // Offsets

   115   int relocation_offset() const                  { return _header_size; }

   116   int instructions_offset() const                { return _instructions_offset; }

   117   int data_offset() const                        { return _data_offset; }

   119   // Sizes

   120   int size() const                               { return _size; }

   121   int header_size() const                        { return _header_size; }

   122   int relocation_size() const                    { return (address) relocation_end() - (address) relocation_begin(); }

   123   int instructions_size() const                  { return instructions_end() - instructions_begin();  }

   124   int data_size() const                          { return data_end() - data_begin(); }

   126   // Containment

   127   bool blob_contains(address addr) const         { return header_begin()       <= addr && addr < data_end(); }

   128   bool relocation_contains(relocInfo* addr) const{ return relocation_begin()   <= addr && addr < relocation_end(); }

   129   bool instructions_contains(address addr) const { return instructions_begin() <= addr && addr < instructions_end(); }

   130   bool data_contains(address addr) const         { return data_begin()         <= addr && addr < data_end(); }

   131   bool contains(address addr) const              { return instructions_contains(addr); }

   132   bool is_frame_complete_at(address addr) const  { return instructions_contains(addr) &&

   133                                                           addr >= instructions_begin() + _frame_complete_offset; }

   135   // CodeCache support: really only used by the nmethods, but in order to get

   136   // asserts and certain bookkeeping to work in the CodeCache they are defined

   137   // virtual here.

   138   virtual bool is_zombie() const                 { return false; }

   139   virtual bool is_locked_by_vm() const           { return false; }

   141   virtual bool is_unloaded() const               { return false; }

   142   virtual bool is_not_entrant() const            { return false; }

   144   // GC support

   145   virtual bool is_alive() const                  = 0;

   147   // OopMap for frame

   148   OopMapSet* oop_maps() const                    { return _oop_maps; }

   149   void set_oop_maps(OopMapSet* p);

   150   OopMap* oop_map_for_return_address(address return_address);

   151   virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f)  { ShouldNotReachHere(); }

   153   // Frame support

   154   int  frame_size() const                        { return _frame_size; }

   155   void set_frame_size(int size)                  { _frame_size = size; }

   157   // Returns true, if the next frame is responsible for GC'ing oops passed as arguments

   158   virtual bool caller_must_gc_arguments(JavaThread* thread) const { return false; }

   160   // Naming

   161   const char* name() const                       { return _name; }

   162   void set_name(const char* name)                { _name = name; }

   164   // Debugging

   165   virtual void verify();

   166   virtual void print() const                     PRODUCT_RETURN;

   167   virtual void print_value_on(outputStream* st) const PRODUCT_RETURN;

   169   // Print the comment associated with offset on stream, if there is one

   170   virtual void print_block_comment(outputStream* stream, address block_begin) {

   171     intptr_t offset = (intptr_t)(block_begin - instructions_begin());

   172     _comments.print_block_comment(stream, offset);

   173   }

   175   // Transfer ownership of comments to this CodeBlob

   176   void set_comments(CodeComments& comments) {

   177     _comments.assign(comments);

   178   }

   179 };

   182 //----------------------------------------------------------------------------------------------------

   183 // BufferBlob: used to hold non-relocatable machine code such as the interpreter, stubroutines, etc.

   185 class BufferBlob: public CodeBlob {

   186   friend class VMStructs;

   187   friend class AdapterBlob;

   188   friend class MethodHandlesAdapterBlob;

   190  private:

   191   // Creation support

   192   BufferBlob(const char* name, int size);

   193   BufferBlob(const char* name, int size, CodeBuffer* cb);

   195   void* operator new(size_t s, unsigned size);

   197  public:

   198   // Creation

   199   static BufferBlob* create(const char* name, int buffer_size);

   200   static BufferBlob* create(const char* name, CodeBuffer* cb);

   202   static void free(BufferBlob* buf);

   204   // Typing

   205   virtual bool is_buffer_blob() const            { return true; }

   207   // GC/Verification support

   208   void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f)  { /* nothing to do */ }

   209   bool is_alive() const                          { return true; }

   211   void verify();

   212   void print() const                             PRODUCT_RETURN;

   213   void print_value_on(outputStream* st) const    PRODUCT_RETURN;

   214 };

   217 //----------------------------------------------------------------------------------------------------

   218 // AdapterBlob: used to hold C2I/I2C adapters

   220 class AdapterBlob: public BufferBlob {

   221 private:

   222   AdapterBlob(int size)                 : BufferBlob("I2C/C2I adapters", size) {}

   223   AdapterBlob(int size, CodeBuffer* cb) : BufferBlob("I2C/C2I adapters", size, cb) {}

   225 public:

   226   // Creation

   227   static AdapterBlob* create(CodeBuffer* cb);

   229   // Typing

   230   virtual bool is_adapter_blob() const { return true; }

   231 };

   234 //----------------------------------------------------------------------------------------------------

   235 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters

   237 class MethodHandlesAdapterBlob: public BufferBlob {

   238 private:

   239   MethodHandlesAdapterBlob(int size)                 : BufferBlob("MethodHandles adapters", size) {}

   240   MethodHandlesAdapterBlob(int size, CodeBuffer* cb) : BufferBlob("MethodHandles adapters", size, cb) {}

   242 public:

   243   // Creation

   244   static MethodHandlesAdapterBlob* create(int buffer_size);

   246   // Typing

   247   virtual bool is_method_handles_adapter_blob() const { return true; }

   248 };

   251 //----------------------------------------------------------------------------------------------------

   252 // RuntimeStub: describes stubs used by compiled code to call a (static) C++ runtime routine

   254 class RuntimeStub: public CodeBlob {

   255   friend class VMStructs;

   256  private:

   257   bool        _caller_must_gc_arguments;

   259   // Creation support

   260   RuntimeStub(

   261     const char* name,

   262     CodeBuffer* cb,

   263     int         size,

   264     int         frame_complete,

   265     int         frame_size,

   266     OopMapSet*  oop_maps,

   267     bool        caller_must_gc_arguments

   268   );

   270   void* operator new(size_t s, unsigned size);

   272  public:

   273   // Creation

   274   static RuntimeStub* new_runtime_stub(

   275     const char* stub_name,

   276     CodeBuffer* cb,

   277     int         frame_complete,

   278     int         frame_size,

   279     OopMapSet*  oop_maps,

   280     bool        caller_must_gc_arguments

   281   );

   283   // Typing

   284   bool is_runtime_stub() const                   { return true; }

   286   // GC support

   287   bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; }

   289   address entry_point()                          { return instructions_begin(); }

   291   // GC/Verification support

   292   void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f)  { /* nothing to do */ }

   293   bool is_alive() const                          { return true; }

   295   void verify();

   296   void print() const                             PRODUCT_RETURN;

   297   void print_value_on(outputStream* st) const    PRODUCT_RETURN;

   298 };

   301 //----------------------------------------------------------------------------------------------------

   302 // Super-class for all blobs that exist in only one instance. Implements default behaviour.

   304 class SingletonBlob: public CodeBlob {

   305   friend class VMStructs;

   306   public:

   307    SingletonBlob(

   308      const char* name,

   309      CodeBuffer* cb,

   310      int         header_size,

   311      int         size,

   312      int         frame_size,

   313      OopMapSet*  oop_maps

   314    )

   315    : CodeBlob(name, cb, header_size, size, CodeOffsets::frame_never_safe, frame_size, oop_maps)

   316    {};

   318    bool is_alive() const                         { return true; }

   320    void verify(); // does nothing

   321    void print() const                            PRODUCT_RETURN;

   322    void print_value_on(outputStream* st) const   PRODUCT_RETURN;

   323 };

   326 //----------------------------------------------------------------------------------------------------

   327 // DeoptimizationBlob

   329 class DeoptimizationBlob: public SingletonBlob {

   330   friend class VMStructs;

   331  private:

   332   int _unpack_offset;

   333   int _unpack_with_exception;

   334   int _unpack_with_reexecution;

   336   int _unpack_with_exception_in_tls;

   338   // Creation support

   339   DeoptimizationBlob(

   340     CodeBuffer* cb,

   341     int         size,

   342     OopMapSet*  oop_maps,

   343     int         unpack_offset,

   344     int         unpack_with_exception_offset,

   345     int         unpack_with_reexecution_offset,

   346     int         frame_size

   347   );

   349   void* operator new(size_t s, unsigned size);

   351  public:

   352   // Creation

   353   static DeoptimizationBlob* create(

   354     CodeBuffer* cb,

   355     OopMapSet*  oop_maps,

   356     int         unpack_offset,

   357     int         unpack_with_exception_offset,

   358     int         unpack_with_reexecution_offset,

   359     int         frame_size

   360   );

   362   // Typing

   363   bool is_deoptimization_stub() const { return true; }

   364   const DeoptimizationBlob *as_deoptimization_stub() const { return this; }

   365   bool exception_address_is_unpack_entry(address pc) const {

   366     address unpack_pc = unpack();

   367     return (pc == unpack_pc || (pc + frame::pc_return_offset) == unpack_pc);

   368   }

   373   // GC for args

   374   void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ }

   376   // Printing

   377   void print_value_on(outputStream* st) const PRODUCT_RETURN;

   379   address unpack() const                         { return instructions_begin() + _unpack_offset;           }

   380   address unpack_with_exception() const          { return instructions_begin() + _unpack_with_exception;   }

   381   address unpack_with_reexecution() const        { return instructions_begin() + _unpack_with_reexecution; }

   383   // Alternate entry point for C1 where the exception and issuing pc

   384   // are in JavaThread::_exception_oop and JavaThread::_exception_pc

   385   // instead of being in registers.  This is needed because C1 doesn't

   386   // model exception paths in a way that keeps these registers free so

   387   // there may be live values in those registers during deopt.

   388   void set_unpack_with_exception_in_tls_offset(int offset) {

   389     _unpack_with_exception_in_tls = offset;

   390     assert(contains(instructions_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob");

   391   }

   392   address unpack_with_exception_in_tls() const   { return instructions_begin() + _unpack_with_exception_in_tls;   }

   393 };

   396 //----------------------------------------------------------------------------------------------------

   397 // UncommonTrapBlob (currently only used by Compiler 2)

   399 #ifdef COMPILER2

   401 class UncommonTrapBlob: public SingletonBlob {

   402   friend class VMStructs;

   403  private:

   404   // Creation support

   405   UncommonTrapBlob(

   406     CodeBuffer* cb,

   407     int         size,

   408     OopMapSet*  oop_maps,

   409     int         frame_size

   410   );

   412   void* operator new(size_t s, unsigned size);

   414  public:

   415   // Creation

   416   static UncommonTrapBlob* create(

   417     CodeBuffer* cb,

   418     OopMapSet*  oop_maps,

   419     int         frame_size

   420   );

   422   // GC for args

   423   void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f)  { /* nothing to do */ }

   425   // Typing

   426   bool is_uncommon_trap_stub() const             { return true; }

   427 };

   430 //----------------------------------------------------------------------------------------------------

   431 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2)

   433 class ExceptionBlob: public SingletonBlob {

   434   friend class VMStructs;

   435  private:

   436   // Creation support

   437   ExceptionBlob(

   438     CodeBuffer* cb,

   439     int         size,

   440     OopMapSet*  oop_maps,

   441     int         frame_size

   442   );

   444   void* operator new(size_t s, unsigned size);

   446  public:

   447   // Creation

   448   static ExceptionBlob* create(

   449     CodeBuffer* cb,

   450     OopMapSet*  oop_maps,

   451     int         frame_size

   452   );

   454   // GC for args

   455   void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f)  { /* nothing to do */ }

   457   // Typing

   458   bool is_exception_stub() const                 { return true; }

   459 };

   460 #endif // COMPILER2

   463 //----------------------------------------------------------------------------------------------------

   464 // SafepointBlob: handles illegal_instruction exceptions during a safepoint

   466 class SafepointBlob: public SingletonBlob {

   467   friend class VMStructs;

   468  private:

   469   // Creation support

   470   SafepointBlob(

   471     CodeBuffer* cb,

   472     int         size,

   473     OopMapSet*  oop_maps,

   474     int         frame_size

   475   );

   477   void* operator new(size_t s, unsigned size);

   479  public:

   480   // Creation

   481   static SafepointBlob* create(

   482     CodeBuffer* cb,

   483     OopMapSet*  oop_maps,

   484     int         frame_size

   485   );

   487   // GC for args

   488   void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f)  { /* nothing to do */ }

   490   // Typing

   491   bool is_safepoint_stub() const                 { return true; }

   492 };

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/code/codeBlob.hpp@e9ff18c4ace7

src/share/vm/code/codeBlob.hpp