jdk8-mips64-public/hotspot: src/share/vm/code/codeBlob.hpp@82f9d3b7e317

8199406: Performance drop with Java JDK 1.8.0_162-b32
Summary: Improve the nmethod unloading times by optimizing the search for an itable stub in VtableStubs array
Reviewed-by: kvn, coleenp, tschatzl

     1 /*

     2  * Copyright (c) 1998, 2018, 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 #ifndef SHARE_VM_CODE_CODEBLOB_HPP

    26 #define SHARE_VM_CODE_CODEBLOB_HPP

    28 #include "asm/codeBuffer.hpp"

    29 #include "compiler/oopMap.hpp"

    30 #include "runtime/frame.hpp"

    31 #include "runtime/handles.hpp"

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

    34 //

    35 // Suptypes are:

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

    37 //   RuntimeStub        : Call to VM runtime methods

    38 //   DeoptimizationBlob : Used for deoptimizatation

    39 //   ExceptionBlob      : Used for stack unrolling

    40 //   SafepointBlob      : Used to handle illegal instruction exceptions

    41 //

    42 //

    43 // Layout:

    44 //   - header

    45 //   - relocation

    46 //   - content space

    47 //     - instruction space

    48 //   - data space

    49 class DeoptimizationBlob;

    51 class CodeBlob VALUE_OBJ_CLASS_SPEC {

    53   friend class VMStructs;

    55  private:

    56   const char* _name;

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

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

    59   int        _relocation_size;                   // size of relocation

    60   int        _content_offset;                    // offset to where content region begins (this includes consts, insts, stubs)

    61   int        _code_offset;                       // offset to where instructions region begins (this includes insts, stubs)

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

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

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

    65                                                  // which we don't detect.

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

    67   int        _frame_size;                        // size of stack frame

    68   OopMapSet* _oop_maps;                          // OopMap for this CodeBlob

    69   CodeStrings _strings;

    71  public:

    72   // Returns the space needed for CodeBlob

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

    75   // Creation

    76   // a) simple CodeBlob

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

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

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

    81   // b) full CodeBlob

    82   CodeBlob(

    83     const char* name,

    84     CodeBuffer* cb,

    85     int         header_size,

    86     int         size,

    87     int         frame_complete,

    88     int         frame_size,

    89     OopMapSet*  oop_maps

    90   );

    92   // Deletion

    93   void flush();

    95   // Typing

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

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

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

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

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

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

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

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

   104   virtual bool is_vtable_blob() const                 { return false; }

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

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

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

   110   // Casting

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

   113   // Boundaries

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

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

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

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

   118   address    content_begin() const               { return (address)    header_begin() + _content_offset; }

   119   address    content_end() const                 { return (address)    header_begin() + _data_offset; }

   120   address    code_begin() const                  { return (address)    header_begin() + _code_offset; }

   121   address    code_end() const                    { return (address)    header_begin() + _data_offset; }

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

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

   125   // Offsets

   126   int relocation_offset() const                  { return _header_size; }

   127   int content_offset() const                     { return _content_offset; }

   128   int code_offset() const                        { return _code_offset; }

   129   int data_offset() const                        { return _data_offset; }

   131   // Sizes

   132   int size() const                               { return _size; }

   133   int header_size() const                        { return _header_size; }

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

   135   int content_size() const                       { return           content_end()    -           content_begin();    }

   136   int code_size() const                          { return           code_end()       -           code_begin();       }

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

   139   // Containment

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

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

   142   bool content_contains(address addr) const      { return content_begin()      <= addr && addr < content_end();    }

   143   bool code_contains(address addr) const         { return code_begin()         <= addr && addr < code_end();       }

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

   145   bool contains(address addr) const              { return content_contains(addr); }

   146   bool is_frame_complete_at(address addr) const  { return code_contains(addr) &&

   147                                                           addr >= code_begin() + _frame_complete_offset; }

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

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

   151   // virtual here.

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

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

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

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

   158   // GC support

   159   virtual bool is_alive() const                  = 0;

   161   // OopMap for frame

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

   163   void set_oop_maps(OopMapSet* p);

   164   OopMap* oop_map_for_return_address(address return_address);

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

   167   // Frame support

   168   int  frame_size() const                        { return _frame_size; }

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

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

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

   174   // Naming

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

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

   178   // Debugging

   179   virtual void verify();

   180   void print() const                             { print_on(tty); }

   181   virtual void print_on(outputStream* st) const;

   182   virtual void print_value_on(outputStream* st) const;

   184   // Deal with Disassembler, VTune, Forte, JvmtiExport, MemoryService.

   185   static void trace_new_stub(CodeBlob* blob, const char* name1, const char* name2 = "");

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

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

   189     intptr_t offset = (intptr_t)(block_begin - code_begin());

   190     _strings.print_block_comment(stream, offset);

   191   }

   193   // Transfer ownership of comments to this CodeBlob

   194   void set_strings(CodeStrings& strings) {

   195     _strings.assign(strings);

   196   }

   197 };

   200 //----------------------------------------------------------------------------------------------------

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

   203 class BufferBlob: public CodeBlob {

   204   friend class VMStructs;

   205   friend class AdapterBlob;

   206   friend class VtableBlob;

   207   friend class MethodHandlesAdapterBlob;

   209  private:

   210   // Creation support

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

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

   214   void* operator new(size_t s, unsigned size, bool is_critical = false) throw();

   216  public:

   217   // Creation

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

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

   221   static void free(BufferBlob* buf);

   223   // Typing

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

   226   // GC/Verification support

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

   228   bool is_alive() const                          { return true; }

   230   void verify();

   231   void print_on(outputStream* st) const;

   232   void print_value_on(outputStream* st) const;

   233 };

   236 //----------------------------------------------------------------------------------------------------

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

   239 class AdapterBlob: public BufferBlob {

   240 private:

   241   AdapterBlob(int size, CodeBuffer* cb);

   243 public:

   244   // Creation

   245   static AdapterBlob* create(CodeBuffer* cb);

   247   // Typing

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

   249 };

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

   252 class VtableBlob: public BufferBlob {

   253 private:

   254   VtableBlob(const char*, int);

   256 public:

   257   // Creation

   258   static VtableBlob* create(const char* name, int buffer_size);

   260   // Typing

   261   virtual bool is_vtable_blob() const { return true; }

   262 };

   264 //----------------------------------------------------------------------------------------------------

   265 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters

   267 class MethodHandlesAdapterBlob: public BufferBlob {

   268 private:

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

   271 public:

   272   // Creation

   273   static MethodHandlesAdapterBlob* create(int buffer_size);

   275   // Typing

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

   277 };

   280 //----------------------------------------------------------------------------------------------------

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

   283 class RuntimeStub: public CodeBlob {

   284   friend class VMStructs;

   285  private:

   286   bool        _caller_must_gc_arguments;

   288   // Creation support

   289   RuntimeStub(

   290     const char* name,

   291     CodeBuffer* cb,

   292     int         size,

   293     int         frame_complete,

   294     int         frame_size,

   295     OopMapSet*  oop_maps,

   296     bool        caller_must_gc_arguments

   297   );

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

   301  public:

   302   // Creation

   303   static RuntimeStub* new_runtime_stub(

   304     const char* stub_name,

   305     CodeBuffer* cb,

   306     int         frame_complete,

   307     int         frame_size,

   308     OopMapSet*  oop_maps,

   309     bool        caller_must_gc_arguments

   310   );

   312   // Typing

   313   bool is_runtime_stub() const                   { return true; }

   315   // GC support

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

   318   address entry_point()                          { return code_begin(); }

   320   // GC/Verification support

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

   322   bool is_alive() const                          { return true; }

   324   void verify();

   325   void print_on(outputStream* st) const;

   326   void print_value_on(outputStream* st) const;

   327 };

   330 //----------------------------------------------------------------------------------------------------

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

   333 class SingletonBlob: public CodeBlob {

   334   friend class VMStructs;

   336  protected:

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

   339  public:

   340    SingletonBlob(

   341      const char* name,

   342      CodeBuffer* cb,

   343      int         header_size,

   344      int         size,

   345      int         frame_size,

   346      OopMapSet*  oop_maps

   347    )

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

   349   {};

   351   address entry_point()                          { return code_begin(); }

   353   bool is_alive() const                          { return true; }

   355   void verify(); // does nothing

   356   void print_on(outputStream* st) const;

   357   void print_value_on(outputStream* st) const;

   358 };

   361 //----------------------------------------------------------------------------------------------------

   362 // DeoptimizationBlob

   364 class DeoptimizationBlob: public SingletonBlob {

   365   friend class VMStructs;

   366  private:

   367   int _unpack_offset;

   368   int _unpack_with_exception;

   369   int _unpack_with_reexecution;

   371   int _unpack_with_exception_in_tls;

   373   // Creation support

   374   DeoptimizationBlob(

   375     CodeBuffer* cb,

   376     int         size,

   377     OopMapSet*  oop_maps,

   378     int         unpack_offset,

   379     int         unpack_with_exception_offset,

   380     int         unpack_with_reexecution_offset,

   381     int         frame_size

   382   );

   384  public:

   385   // Creation

   386   static DeoptimizationBlob* create(

   387     CodeBuffer* cb,

   388     OopMapSet*  oop_maps,

   389     int         unpack_offset,

   390     int         unpack_with_exception_offset,

   391     int         unpack_with_reexecution_offset,

   392     int         frame_size

   393   );

   395   // Typing

   396   bool is_deoptimization_stub() const { return true; }

   397   bool exception_address_is_unpack_entry(address pc) const {

   398     address unpack_pc = unpack();

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

   400   }

   405   // GC for args

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

   408   // Printing

   409   void print_value_on(outputStream* st) const;

   411   address unpack() const                         { return code_begin() + _unpack_offset;           }

   412   address unpack_with_exception() const          { return code_begin() + _unpack_with_exception;   }

   413   address unpack_with_reexecution() const        { return code_begin() + _unpack_with_reexecution; }

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

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

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

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

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

   420   void set_unpack_with_exception_in_tls_offset(int offset) {

   421     _unpack_with_exception_in_tls = offset;

   422     assert(code_contains(code_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob");

   423   }

   424   address unpack_with_exception_in_tls() const   { return code_begin() + _unpack_with_exception_in_tls; }

   425 };

   428 //----------------------------------------------------------------------------------------------------

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

   431 #ifdef COMPILER2

   433 class UncommonTrapBlob: public SingletonBlob {

   434   friend class VMStructs;

   435  private:

   436   // Creation support

   437   UncommonTrapBlob(

   438     CodeBuffer* cb,

   439     int         size,

   440     OopMapSet*  oop_maps,

   441     int         frame_size

   442   );

   444  public:

   445   // Creation

   446   static UncommonTrapBlob* create(

   447     CodeBuffer* cb,

   448     OopMapSet*  oop_maps,

   449     int         frame_size

   450   );

   452   // GC for args

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

   455   // Typing

   456   bool is_uncommon_trap_stub() const             { return true; }

   457 };

   460 //----------------------------------------------------------------------------------------------------

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

   463 class ExceptionBlob: public SingletonBlob {

   464   friend class VMStructs;

   465  private:

   466   // Creation support

   467   ExceptionBlob(

   468     CodeBuffer* cb,

   469     int         size,

   470     OopMapSet*  oop_maps,

   471     int         frame_size

   472   );

   474  public:

   475   // Creation

   476   static ExceptionBlob* create(

   477     CodeBuffer* cb,

   478     OopMapSet*  oop_maps,

   479     int         frame_size

   480   );

   482   // GC for args

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

   485   // Typing

   486   bool is_exception_stub() const                 { return true; }

   487 };

   488 #endif // COMPILER2

   491 //----------------------------------------------------------------------------------------------------

   492 // SafepointBlob: handles illegal_instruction exceptions during a safepoint

   494 class SafepointBlob: public SingletonBlob {

   495   friend class VMStructs;

   496  private:

   497   // Creation support

   498   SafepointBlob(

   499     CodeBuffer* cb,

   500     int         size,

   501     OopMapSet*  oop_maps,

   502     int         frame_size

   503   );

   505  public:

   506   // Creation

   507   static SafepointBlob* create(

   508     CodeBuffer* cb,

   509     OopMapSet*  oop_maps,

   510     int         frame_size

   511   );

   513   // GC for args

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

   516   // Typing

   517   bool is_safepoint_stub() const                 { return true; }

   518 };

   520 #endif // SHARE_VM_CODE_CODEBLOB_HPP

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

src/share/vm/code/codeBlob.hpp@82f9d3b7e317

src/share/vm/code/codeBlob.hpp