jdk8-mips64-public/hotspot: src/share/vm/code/codeBlob.hpp@8e954aedbb81

6889869: assert(!Interpreter::bytecode_should_reexecute(code),"should not reexecute")
Reviewed-by: jrose, kvn, cfang, twisti

     1 /*

     2  * Copyright 1998-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any 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        _oops_offset;                       // offset to where embedded oop table begins (inside data)

    58   int        _oops_length;                       // number of embedded oops

    59   int        _frame_size;                        // size of stack frame

    60   OopMapSet* _oop_maps;                          // OopMap for this CodeBlob

    61   CodeComments _comments;

    63   friend class OopRecorder;

    65   void fix_oop_relocations(address begin, address end, bool initialize_immediates);

    66   inline void initialize_immediate_oop(oop* dest, jobject handle);

    68  public:

    69   // Returns the space needed for CodeBlob

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

    72   // Creation

    73   // a) simple CodeBlob

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

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

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

    78   // b) full CodeBlob

    79   CodeBlob(

    80     const char* name,

    81     CodeBuffer* cb,

    82     int         header_size,

    83     int         size,

    84     int         frame_complete,

    85     int         frame_size,

    86     OopMapSet*  oop_maps

    87   );

    89   // Deletion

    90   void flush();

    92   // Typing

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

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

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

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

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

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

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

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

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

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

   105   // Boundaries

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

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

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

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

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

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

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

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

   114   oop*       oops_begin() const                  { return (oop*)      (header_begin() + _oops_offset); }

   115   oop*       oops_end() const                    { return                oops_begin() + _oops_length; }

   117   // Offsets

   118   int relocation_offset() const                  { return _header_size; }

   119   int instructions_offset() const                { return _instructions_offset; }

   120   int data_offset() const                        { return _data_offset; }

   121   int oops_offset() const                        { return _oops_offset; }

   123   // Sizes

   124   int size() const                               { return _size; }

   125   int header_size() const                        { return _header_size; }

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

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

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

   129   int oops_size() const                          { return (address) oops_end() - (address) oops_begin(); }

   131   // Containment

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

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

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

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

   136   bool oops_contains(oop* addr) const            { return oops_begin()         <= addr && addr < oops_end(); }

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

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

   139                                                           addr >= instructions_begin() + _frame_complete_offset; }

   141   // Relocation support

   142   void fix_oop_relocations(address begin, address end) {

   143     fix_oop_relocations(begin, end, false);

   144   }

   145   void fix_oop_relocations() {

   146     fix_oop_relocations(NULL, NULL, false);

   147   }

   148   relocInfo::relocType reloc_type_for_address(address pc);

   149   bool is_at_poll_return(address pc);

   150   bool is_at_poll_or_poll_return(address pc);

   152   // Support for oops in scopes and relocs:

   153   // Note: index 0 is reserved for null.

   154   oop  oop_at(int index) const                   { return index == 0? (oop)NULL: *oop_addr_at(index); }

   155   oop* oop_addr_at(int index) const{             // for GC

   156     // relocation indexes are biased by 1 (because 0 is reserved)

   157     assert(index > 0 && index <= _oops_length, "must be a valid non-zero index");

   158     return &oops_begin()[index-1];

   159   }

   161   void copy_oops(GrowableArray<jobject>* oops);

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

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

   165   // virtual here.

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

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

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

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

   172   // GC support

   173   virtual bool is_alive() const                  = 0;

   174   virtual void do_unloading(BoolObjectClosure* is_alive,

   175                             OopClosure* keep_alive,

   176                             bool unloading_occurred);

   177   virtual void oops_do(OopClosure* f) = 0;

   178   // (All CodeBlob subtypes other than NMethod currently have

   179   // an empty oops_do() method.

   181   // OopMap for frame

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

   183   void set_oop_maps(OopMapSet* p);

   184   OopMap* oop_map_for_return_address(address return_address);

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

   187   // Frame support

   188   int  frame_size() const                        { return _frame_size; }

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

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

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

   194   // Naming

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

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

   198   // Debugging

   199   virtual void verify();

   200   virtual void print() const                     PRODUCT_RETURN;

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

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

   204   void print_block_comment(outputStream* stream, intptr_t offset) {

   205     _comments.print_block_comment(stream, offset);

   206   }

   208   // Transfer ownership of comments to this CodeBlob

   209   void set_comments(CodeComments& comments) {

   210     _comments.assign(comments);

   211   }

   212 };

   215 //----------------------------------------------------------------------------------------------------

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

   218 class BufferBlob: public CodeBlob {

   219   friend class VMStructs;

   220  private:

   221   // Creation support

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

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

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

   227  public:

   228   // Creation

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

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

   232   static void free(BufferBlob* buf);

   234   // Typing

   235   bool is_buffer_blob() const                    { return true; }

   236   bool is_adapter_blob() const;

   238   // GC/Verification support

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

   240   bool is_alive() const                          { return true; }

   241   void do_unloading(BoolObjectClosure* is_alive,

   242                     OopClosure* keep_alive,

   243                     bool unloading_occurred)     { /* do nothing */ }

   245   void oops_do(OopClosure* f)                    { /* do nothing*/ }

   247   void verify();

   248   void print() const                             PRODUCT_RETURN;

   249   void print_value_on(outputStream* st) const    PRODUCT_RETURN;

   250 };

   253 //----------------------------------------------------------------------------------------------------

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

   256 class RuntimeStub: public CodeBlob {

   257   friend class VMStructs;

   258  private:

   259   bool        _caller_must_gc_arguments;

   261   // Creation support

   262   RuntimeStub(

   263     const char* name,

   264     CodeBuffer* cb,

   265     int         size,

   266     int         frame_complete,

   267     int         frame_size,

   268     OopMapSet*  oop_maps,

   269     bool        caller_must_gc_arguments

   270   );

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

   274  public:

   275   // Creation

   276   static RuntimeStub* new_runtime_stub(

   277     const char* stub_name,

   278     CodeBuffer* cb,

   279     int         frame_complete,

   280     int         frame_size,

   281     OopMapSet*  oop_maps,

   282     bool        caller_must_gc_arguments

   283   );

   285   // Typing

   286   bool is_runtime_stub() const                   { return true; }

   288   // GC support

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

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

   293   // GC/Verification support

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

   295   bool is_alive() const                          { return true; }

   296   void do_unloading(BoolObjectClosure* is_alive,

   297                     OopClosure* keep_alive,

   298                     bool unloading_occurred)     { /* do nothing */ }

   299   void oops_do(OopClosure* f) { /* do-nothing*/ }

   301   void verify();

   302   void print() const                             PRODUCT_RETURN;

   303   void print_value_on(outputStream* st) const    PRODUCT_RETURN;

   304 };

   307 //----------------------------------------------------------------------------------------------------

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

   310 class SingletonBlob: public CodeBlob {

   311   friend class VMStructs;

   312   public:

   313    SingletonBlob(

   314      const char* name,

   315      CodeBuffer* cb,

   316      int         header_size,

   317      int         size,

   318      int         frame_size,

   319      OopMapSet*  oop_maps

   320    )

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

   322    {};

   324    bool is_alive() const                         { return true; }

   325    void do_unloading(BoolObjectClosure* is_alive,

   326                      OopClosure* keep_alive,

   327                      bool unloading_occurred)    { /* do-nothing*/ }

   329    void verify(); // does nothing

   330    void print() const                            PRODUCT_RETURN;

   331    void print_value_on(outputStream* st) const   PRODUCT_RETURN;

   332 };

   335 //----------------------------------------------------------------------------------------------------

   336 // DeoptimizationBlob

   338 class DeoptimizationBlob: public SingletonBlob {

   339   friend class VMStructs;

   340  private:

   341   int _unpack_offset;

   342   int _unpack_with_exception;

   343   int _unpack_with_reexecution;

   345   int _unpack_with_exception_in_tls;

   347   // Creation support

   348   DeoptimizationBlob(

   349     CodeBuffer* cb,

   350     int         size,

   351     OopMapSet*  oop_maps,

   352     int         unpack_offset,

   353     int         unpack_with_exception_offset,

   354     int         unpack_with_reexecution_offset,

   355     int         frame_size

   356   );

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

   360  public:

   361   // Creation

   362   static DeoptimizationBlob* create(

   363     CodeBuffer* cb,

   364     OopMapSet*  oop_maps,

   365     int         unpack_offset,

   366     int         unpack_with_exception_offset,

   367     int         unpack_with_reexecution_offset,

   368     int         frame_size

   369   );

   371   // Typing

   372   bool is_deoptimization_stub() const { return true; }

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

   374   bool exception_address_is_unpack_entry(address pc) const {

   375     address unpack_pc = unpack();

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

   377   }

   382   // GC for args

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

   385   // Iteration

   386   void oops_do(OopClosure* f) {}

   388   // Printing

   389   void print_value_on(outputStream* st) const PRODUCT_RETURN;

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

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

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

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

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

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

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

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

   400   void set_unpack_with_exception_in_tls_offset(int offset) {

   401     _unpack_with_exception_in_tls = offset;

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

   403   }

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

   405 };

   408 //----------------------------------------------------------------------------------------------------

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

   411 #ifdef COMPILER2

   413 class UncommonTrapBlob: public SingletonBlob {

   414   friend class VMStructs;

   415  private:

   416   // Creation support

   417   UncommonTrapBlob(

   418     CodeBuffer* cb,

   419     int         size,

   420     OopMapSet*  oop_maps,

   421     int         frame_size

   422   );

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

   426  public:

   427   // Creation

   428   static UncommonTrapBlob* create(

   429     CodeBuffer* cb,

   430     OopMapSet*  oop_maps,

   431     int         frame_size

   432   );

   434   // GC for args

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

   437   // Typing

   438   bool is_uncommon_trap_stub() const             { return true; }

   440   // Iteration

   441   void oops_do(OopClosure* f) {}

   442 };

   445 //----------------------------------------------------------------------------------------------------

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

   448 class ExceptionBlob: public SingletonBlob {

   449   friend class VMStructs;

   450  private:

   451   // Creation support

   452   ExceptionBlob(

   453     CodeBuffer* cb,

   454     int         size,

   455     OopMapSet*  oop_maps,

   456     int         frame_size

   457   );

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

   461  public:

   462   // Creation

   463   static ExceptionBlob* create(

   464     CodeBuffer* cb,

   465     OopMapSet*  oop_maps,

   466     int         frame_size

   467   );

   469   // GC for args

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

   472   // Typing

   473   bool is_exception_stub() const                 { return true; }

   475   // Iteration

   476   void oops_do(OopClosure* f) {}

   477 };

   478 #endif // COMPILER2

   481 //----------------------------------------------------------------------------------------------------

   482 // SafepointBlob: handles illegal_instruction exceptions during a safepoint

   484 class SafepointBlob: public SingletonBlob {

   485   friend class VMStructs;

   486  private:

   487   // Creation support

   488   SafepointBlob(

   489     CodeBuffer* cb,

   490     int         size,

   491     OopMapSet*  oop_maps,

   492     int         frame_size

   493   );

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

   497  public:

   498   // Creation

   499   static SafepointBlob* create(

   500     CodeBuffer* cb,

   501     OopMapSet*  oop_maps,

   502     int         frame_size

   503   );

   505   // GC for args

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

   508   // Typing

   509   bool is_safepoint_stub() const                 { return true; }

   511   // Iteration

   512   void oops_do(OopClosure* f) {}

   513 };

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

src/share/vm/code/codeBlob.hpp@8e954aedbb81

src/share/vm/code/codeBlob.hpp