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

src/share/vm/runtime/vframeArray.hpp@eef07cd490d4 (annotated)

src/share/vm/runtime/vframeArray.hpp

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

author: aoqi
date: Wed, 03 Jul 2019 20:42:37 +0800
changeset 9637: eef07cd490d4
parent 7535: 7ae4e26cb1e0
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1997, 2013, 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_RUNTIME_VFRAMEARRAY_HPP
 #define SHARE_VM_RUNTIME_VFRAMEARRAY_HPP
 #include "oops/arrayOop.hpp"
 #include "runtime/deoptimization.hpp"
 #include "runtime/frame.inline.hpp"
 #include "runtime/monitorChunk.hpp"
 #include "utilities/growableArray.hpp"
 // A vframeArray is an array used for momentarily storing off stack Java method activations
 // during deoptimization. Essentially it is an array of vframes where each vframe
 // data is stored off stack. This structure will never exist across a safepoint so
 // there is no need to gc any oops that are stored in the structure.
 class LocalsClosure;
 class ExpressionStackClosure;
 class MonitorStackClosure;
 class MonitorArrayElement;
 class StackValueCollection;
 // A vframeArrayElement is an element of a vframeArray. Each element
 // represent an interpreter frame which will eventually be created.
 class vframeArrayElement : public _ValueObj {
   friend class VMStructs;
   private:
     frame _frame;                                                // the interpreter frame we will unpack into
     int  _bci;                                                   // raw bci for this vframe
     bool _reexecute;                                             // whether sould we reexecute this bytecode
     Method*    _method;                                          // the method for this vframe
     MonitorChunk* _monitors;                                     // active monitors for this vframe
     StackValueCollection* _locals;
     StackValueCollection* _expressions;
 #ifdef ASSERT
     bool _removed_monitors;
 #endif
   public:
   frame* iframe(void)                { return &_frame; }
   int bci(void) const;
   int raw_bci(void) const            { return _bci; }
   bool should_reexecute(void) const  { return _reexecute; }
   Method* method(void) const       { return _method; }
   MonitorChunk* monitors(void) const { return _monitors; }
   void free_monitors(JavaThread* jt);
   StackValueCollection* locals(void) const             { return _locals; }
   StackValueCollection* expressions(void) const        { return _expressions; }
   void fill_in(compiledVFrame* vf, bool realloc_failures);
   // Formerly part of deoptimizedVFrame
   // Returns the on stack word size for this frame
   // callee_parameters is the number of callee locals residing inside this frame
   int on_stack_size(int callee_parameters,
                     int callee_locals,
                     bool is_top_frame,
                     int popframe_extra_stack_expression_els) const;
   // Unpacks the element to skeletal interpreter frame
   void unpack_on_stack(int caller_actual_parameters,
                        int callee_parameters,
                        int callee_locals,
                        frame* caller,
                        bool is_top_frame,
                        bool is_bottom_frame,
                        int exec_mode);
 #ifdef ASSERT
   void set_removed_monitors() {
     _removed_monitors = true;
   }
 #endif
 #ifndef PRODUCT
   void print(outputStream* st);
 #endif /* PRODUCT */
 };
 // this can be a ResourceObj if we don't save the last one...
 // but it does make debugging easier even if we can't look
 // at the data in each vframeElement
 class vframeArray: public CHeapObj<mtCompiler> {
   friend class VMStructs;
  private:
   // Here is what a vframeArray looks like in memory
   /*
       fixed part
         description of the original frame
         _frames - number of vframes in this array
         adapter info
         callee register save area
       variable part
         vframeArrayElement   [ 0 ]
         ...
         vframeArrayElement   [_frames - 1]
   */
   JavaThread*                  _owner_thread;
   vframeArray*                 _next;
   frame                        _original;          // the original frame of the deoptee
   frame                        _caller;            // caller of root frame in vframeArray
   frame                        _sender;
   Deoptimization::UnrollBlock* _unroll_block;
   int                          _frame_size;
   int                          _frames; // number of javavframes in the array (does not count any adapter)
   intptr_t                     _callee_registers[RegisterMap::reg_count];
   unsigned char                _valid[RegisterMap::reg_count];
   vframeArrayElement           _elements[1];   // First variable section.
   void fill_in_element(int index, compiledVFrame* vf);
   bool is_location_valid(int i) const        { return _valid[i] != 0; }
   void set_location_valid(int i, bool valid) { _valid[i] = valid; }
  public:
   // Tells whether index is within bounds.
   bool is_within_bounds(int index) const        { return 0 <= index && index < frames(); }
   // Accessores for instance variable
   int frames() const                            { return _frames;   }
   static vframeArray* allocate(JavaThread* thread, int frame_size, GrowableArray<compiledVFrame*>* chunk,
                                RegisterMap* reg_map, frame sender, frame caller, frame self,
                                bool realloc_failures);
   vframeArrayElement* element(int index)        { assert(is_within_bounds(index), "Bad index"); return &_elements[index]; }
   // Allocates a new vframe in the array and fills the array with vframe information in chunk
   void fill_in(JavaThread* thread, int frame_size, GrowableArray<compiledVFrame*>* chunk, const RegisterMap *reg_map, bool realloc_failures);
   // Returns the owner of this vframeArray
   JavaThread* owner_thread() const           { return _owner_thread; }
   // Accessors for next
   vframeArray* next() const                  { return _next; }
   void set_next(vframeArray* value)          { _next = value; }
   // Accessors for sp
   intptr_t* sp() const                       { return _original.sp(); }
   intptr_t* unextended_sp() const            { return _original.unextended_sp(); }
   address original_pc() const                { return _original.pc(); }
   frame original() const                     { return _original; }
   frame caller() const                       { return _caller; }
   frame sender() const                       { return _sender; }
   // Accessors for unroll block
   Deoptimization::UnrollBlock* unroll_block() const         { return _unroll_block; }
   void set_unroll_block(Deoptimization::UnrollBlock* block) { _unroll_block = block; }
   // Returns the size of the frame that got deoptimized
   int frame_size() const { return _frame_size; }
   // Unpack the array on the stack passed in stack interval
   void unpack_to_stack(frame &unpack_frame, int exec_mode, int caller_actual_parameters);
   // Deallocates monitor chunks allocated during deoptimization.
   // This should be called when the array is not used anymore.
   void deallocate_monitor_chunks();
   // Accessor for register map
   address register_location(int i) const;
   void print_on_2(outputStream* st) PRODUCT_RETURN;
   void print_value_on(outputStream* st) const PRODUCT_RETURN;
 #ifndef PRODUCT
   // Comparing
   bool structural_compare(JavaThread* thread, GrowableArray<compiledVFrame*>* chunk);
 #endif
 };
 #endif // SHARE_VM_RUNTIME_VFRAMEARRAY_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/runtime/vframeArray.hpp@eef07cd490d4 (annotated)

src/share/vm/runtime/vframeArray.hpp