1 /*
   2  * Copyright 1997-2006 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  */
  24 
  25 class compiledVFrame: public javaVFrame {
  26  public:
  27   // JVM state
  28   methodOop                    method()         const;
  29   int                          bci()            const;
  30   StackValueCollection*        locals()         const;
  31   StackValueCollection*        expressions()    const;
  32   GrowableArray<MonitorInfo*>* monitors()       const;
  33 
  34   void set_locals(StackValueCollection* values) const;
  35 
  36   // Virtuals defined in vframe
  37   bool is_compiled_frame() const { return true; }
  38   vframe* sender() const;
  39   bool is_top() const;
  40 
  41   // Casting
  42   static compiledVFrame* cast(vframe* vf) {
  43     assert(vf == NULL || vf->is_compiled_frame(), "must be compiled frame");
  44     return (compiledVFrame*) vf;
  45   }
  46 
  47  public:
  48   // Constructors
  49   compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, nmethod* nm);
  50 
  51   // Update a local in a compiled frame. Update happens when deopt occurs
  52   void update_local(BasicType type, int index, jvalue value);
  53 
  54   // Returns the active nmethod
  55   nmethod*  code() const;
  56 
  57   // Returns the scopeDesc
  58   ScopeDesc* scope() const { return _scope; }
  59 
  60   // Returns SynchronizationEntryBCI or bci() (used for synchronization)
  61   int raw_bci() const;
  62 
  63  protected:
  64   ScopeDesc* _scope;
  65 
  66 
  67   //StackValue resolve(ScopeValue* sv) const;
  68   BasicLock* resolve_monitor_lock(Location location) const;
  69   StackValue *create_stack_value(ScopeValue *sv) const;
  70 
  71  private:
  72   compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, ScopeDesc* scope);
  73 
  74 #ifndef PRODUCT
  75  public:
  76   void verify() const;
  77 #endif
  78 };
  79 
  80 // In order to implement set_locals for compiled vframes we must
  81 // store updated locals in a data structure that contains enough
  82 // information to recognize equality with a vframe and to store
  83 // any updated locals.
  84 
  85 class jvmtiDeferredLocalVariable;
  86 class jvmtiDeferredLocalVariableSet : public CHeapObj {
  87 private:
  88 
  89   methodOop _method;           // must be GC'd
  90   int       _bci;
  91   intptr_t* _id;
  92   GrowableArray<jvmtiDeferredLocalVariable*>* _locals;
  93 
  94  public:
  95   // JVM state
  96   methodOop                         method()         const  { return _method; }
  97   int                               bci()            const  { return _bci; }
  98   intptr_t*                         id()             const  { return _id; }
  99   GrowableArray<jvmtiDeferredLocalVariable*>* locals()         const  { return _locals; }
 100   void                              set_local_at(int idx, BasicType typ, jvalue val);
 101 
 102   // Does the vframe match this jvmtiDeferredLocalVariableSet
 103   bool                              matches(vframe* vf);
 104   // GC
 105   void                              oops_do(OopClosure* f);
 106 
 107   // constructor
 108   jvmtiDeferredLocalVariableSet(methodOop method, int bci, intptr_t* id);
 109 
 110   // destructor
 111   ~jvmtiDeferredLocalVariableSet();
 112 
 113 
 114 };
 115 
 116 class jvmtiDeferredLocalVariable : public CHeapObj {
 117   public:
 118 
 119     jvmtiDeferredLocalVariable(int index, BasicType type, jvalue value);
 120 
 121     BasicType type(void)                   { return _type; }
 122     int index(void)                        { return _index; }
 123     jvalue value(void)                     { return _value; }
 124     // Only mutator is for value as only it can change
 125     void set_value(jvalue value)           { _value = value; }
 126     // For gc
 127     oop* oop_addr(void)                    { return (oop*) &_value.l; }
 128 
 129   private:
 130 
 131     BasicType         _type;
 132     jvalue            _value;
 133     int               _index;
 134 
 135 };