vframe_hp.hpp revision 0:a61af66fc99e 
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
25class 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
85class jvmtiDeferredLocalVariable;
86class jvmtiDeferredLocalVariableSet : public CHeapObj {
87private:
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
116class 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};
136