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.
22 *
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
30 class 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
91 class jvmtiDeferredLocalVariable;
92 class jvmtiDeferredLocalVariableSet : public CHeapObj {
93 private:
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
122 class jvmtiDeferredLocalVariable : public CHeapObj {
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