1 /*
2 * Copyright (c) 1997, 2019, 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_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;
39 int vframe_id() const { return _vframe_id; }
40
41 void set_locals(StackValueCollection* values) const;
42
43 // Virtuals defined in vframe
44 bool is_compiled_frame() const { return true; }
45 vframe* sender() const;
46 bool is_top() const;
47
48 // Casting
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
73 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
121 Method* method() const { return _method; }
122 int bci() const { return _bci; }
123 intptr_t* id() const { return _id; }
124 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
149 BasicType type(void) { return _type; }
150 int index(void) { return _index; }
151 jvalue value(void) { return _value; }
152 // Only mutator is for value as only it can change
153 void set_value(jvalue value) { _value = value; }
154 // For gc
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