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24 
25 #ifndef SHARE_RUNTIME_VFRAME_HP_HPP
26 #define SHARE_RUNTIME_VFRAME_HP_HPP
27 
28 #include "runtime/vframe.hpp"
29 
30 class compiledVFrame: public javaVFrame {
31  public:
32   // JVM state
33   Method*                      method()             const;
34   int                          bci()                const;
35   bool                         should_reexecute()   const;
36   StackValueCollection*        locals()             const;
37   StackValueCollection*        expressions()        const;
38   GrowableArray<MonitorInfo*>* monitors()           const;
vframe_id() const39   int                          vframe_id()          const { return _vframe_id; }
40 
41   void set_locals(StackValueCollection* values) const;
42 
43   // Virtuals defined in vframe
is_compiled_frame() const44   bool is_compiled_frame() const { return true; }
45   vframe* sender() const;
46   bool is_top() const;
47 
48   // Casting
cast(vframe * vf)49   static compiledVFrame* cast(vframe* vf) {
50     assert(vf == NULL || vf->is_compiled_frame(), "must be compiled frame");
51     return (compiledVFrame*) vf;
52   }
53 
54   void update_deferred_value(BasicType type, int index, jvalue value);
55 
56  public:
57   // Constructors
58   compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, CompiledMethod* nm);
59 
60   // Update a local in a compiled frame. Update happens when deopt occurs
61   void update_local(BasicType type, int index, jvalue value);
62 
63   // Update an expression stack value in a compiled frame. Update happens when deopt occurs
64   void update_stack(BasicType type, int index, jvalue value);
65 
66   // Update a lock value in a compiled frame. Update happens when deopt occurs
67   void update_monitor(int index, MonitorInfo* value);
68 
69   // Returns the active nmethod
70   CompiledMethod*  code() const;
71 
72   // Returns the scopeDesc
scope() const73   ScopeDesc* scope() const { return _scope; }
74 
75   // Return the compiledVFrame for the desired scope
76   compiledVFrame* at_scope(int decode_offset, int vframe_id);
77 
78   // Returns SynchronizationEntryBCI or bci() (used for synchronization)
79   int raw_bci() const;
80 
81  protected:
82   ScopeDesc* _scope;
83   int _vframe_id;
84 
85   //StackValue resolve(ScopeValue* sv) const;
86   BasicLock* resolve_monitor_lock(Location location) const;
87   StackValue *create_stack_value(ScopeValue *sv) const;
88 
89  private:
90   compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, ScopeDesc* scope, int vframe_id);
91 
92 #ifndef PRODUCT
93  public:
94   void verify() const;
95 #endif
96 };
97 
98 // In order to implement set_locals for compiled vframes we must
99 // store updated locals in a data structure that contains enough
100 // information to recognize equality with a vframe and to store
101 // any updated locals.
102 
103 class jvmtiDeferredLocalVariable;
104 class jvmtiDeferredLocalVariableSet : public CHeapObj<mtCompiler> {
105   friend class compiledVFrame;
106 
107 private:
108 
109   Method* _method;
110   int       _bci;
111   intptr_t* _id;
112   int _vframe_id;
113   GrowableArray<jvmtiDeferredLocalVariable*>* _locals;
114 
115   void                              update_value(StackValueCollection* locals, BasicType type, int index, jvalue value);
116 
117   void                              set_value_at(int idx, BasicType typ, jvalue val);
118 
119  public:
120   // JVM state
method() const121   Method*                           method()         const  { return _method; }
bci() const122   int                               bci()            const  { return _bci; }
id() const123   intptr_t*                         id()             const  { return _id; }
vframe_id() const124   int                               vframe_id()      const  { return _vframe_id; }
125 
126   void                              update_locals(StackValueCollection* locals);
127   void                              update_stack(StackValueCollection* locals);
128   void                              update_monitors(GrowableArray<MonitorInfo*>* monitors);
129 
130   // Does the vframe match this jvmtiDeferredLocalVariableSet
131   bool                              matches(const vframe* vf);
132   // GC
133   void                              oops_do(OopClosure* f);
134 
135   // constructor
136   jvmtiDeferredLocalVariableSet(Method* method, int bci, intptr_t* id, int vframe_id);
137 
138   // destructor
139   ~jvmtiDeferredLocalVariableSet();
140 
141 
142 };
143 
144 class jvmtiDeferredLocalVariable : public CHeapObj<mtCompiler> {
145   public:
146 
147     jvmtiDeferredLocalVariable(int index, BasicType type, jvalue value);
148 
type(void)149     BasicType type(void)                   { return _type; }
index(void)150     int index(void)                        { return _index; }
value(void)151     jvalue value(void)                     { return _value; }
152     // Only mutator is for value as only it can change
set_value(jvalue value)153     void set_value(jvalue value)           { _value = value; }
154     // For gc
oop_addr(void)155     oop* oop_addr(void)                    { return (oop*) &_value.l; }
156 
157   private:
158 
159     BasicType         _type;
160     jvalue            _value;
161     int               _index;
162 
163 };
164 
165 #endif // SHARE_RUNTIME_VFRAME_HP_HPP
166