vframe_hp.hpp revision 3465:d2a62e0f25eb 
1/*
2 * Copyright (c) 1997, 2010, 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.
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23 */
24
25#ifndef SHARE_VM_RUNTIME_VFRAME_HP_HPP
26#define SHARE_VM_RUNTIME_VFRAME_HP_HPP
27
28#include "runtime/vframe.hpp"
29
30class compiledVFrame: public javaVFrame {
31 public:
32  // JVM state
33  methodOop                    method()             const;
34  int                          bci()                const;
35  bool                         should_reexecute()   const;
36  StackValueCollection*        locals()             const;
37  StackValueCollection*        expressions()        const;
38  GrowableArray<MonitorInfo*>* monitors()           const;
39
40  void set_locals(StackValueCollection* values) const;
41
42  // Virtuals defined in vframe
43  bool is_compiled_frame() const { return true; }
44  vframe* sender() const;
45  bool is_top() const;
46
47  // Casting
48  static compiledVFrame* cast(vframe* vf) {
49    assert(vf == NULL || vf->is_compiled_frame(), "must be compiled frame");
50    return (compiledVFrame*) vf;
51  }
52
53 public:
54  // Constructors
55  compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, nmethod* nm);
56
57  // Update a local in a compiled frame. Update happens when deopt occurs
58  void update_local(BasicType type, int index, jvalue value);
59
60  // Returns the active nmethod
61  nmethod*  code() const;
62
63  // Returns the scopeDesc
64  ScopeDesc* scope() const { return _scope; }
65
66  // Returns SynchronizationEntryBCI or bci() (used for synchronization)
67  int raw_bci() const;
68
69 protected:
70  ScopeDesc* _scope;
71
72
73  //StackValue resolve(ScopeValue* sv) const;
74  BasicLock* resolve_monitor_lock(Location location) const;
75  StackValue *create_stack_value(ScopeValue *sv) const;
76
77 private:
78  compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, ScopeDesc* scope);
79
80#ifndef PRODUCT
81 public:
82  void verify() const;
83#endif
84};
85
86// In order to implement set_locals for compiled vframes we must
87// store updated locals in a data structure that contains enough
88// information to recognize equality with a vframe and to store
89// any updated locals.
90
91class jvmtiDeferredLocalVariable;
92class jvmtiDeferredLocalVariableSet : public CHeapObj<mtCompiler> {
93private:
94
95  methodOop _method;           // must be GC'd
96  int       _bci;
97  intptr_t* _id;
98  GrowableArray<jvmtiDeferredLocalVariable*>* _locals;
99
100 public:
101  // JVM state
102  methodOop                         method()         const  { return _method; }
103  int                               bci()            const  { return _bci; }
104  intptr_t*                         id()             const  { return _id; }
105  GrowableArray<jvmtiDeferredLocalVariable*>* locals()         const  { return _locals; }
106  void                              set_local_at(int idx, BasicType typ, jvalue val);
107
108  // Does the vframe match this jvmtiDeferredLocalVariableSet
109  bool                              matches(vframe* vf);
110  // GC
111  void                              oops_do(OopClosure* f);
112
113  // constructor
114  jvmtiDeferredLocalVariableSet(methodOop method, int bci, intptr_t* id);
115
116  // destructor
117  ~jvmtiDeferredLocalVariableSet();
118
119
120};
121
122class jvmtiDeferredLocalVariable : public CHeapObj<mtCompiler> {
123  public:
124
125    jvmtiDeferredLocalVariable(int index, BasicType type, jvalue value);
126
127    BasicType type(void)                   { return _type; }
128    int index(void)                        { return _index; }
129    jvalue value(void)                     { return _value; }
130    // Only mutator is for value as only it can change
131    void set_value(jvalue value)           { _value = value; }
132    // For gc
133    oop* oop_addr(void)                    { return (oop*) &_value.l; }
134
135  private:
136
137    BasicType         _type;
138    jvalue            _value;
139    int               _index;
140
141};
142
143#endif // SHARE_VM_RUNTIME_VFRAME_HP_HPP
144