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rev 1081 : imported patch indy-cleanup-6893081.patch
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--- old/src/share/vm/code/debugInfoRec.hpp
+++ new/src/share/vm/code/debugInfoRec.hpp
1 1 /*
2 2 * Copyright 1998-2009 Sun Microsystems, Inc. All Rights Reserved.
3 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 4 *
5 5 * This code is free software; you can redistribute it and/or modify it
6 6 * under the terms of the GNU General Public License version 2 only, as
7 7 * published by the Free Software Foundation.
8 8 *
9 9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 12 * version 2 for more details (a copy is included in the LICENSE file that
13 13 * accompanied this code).
14 14 *
15 15 * You should have received a copy of the GNU General Public License version
16 16 * 2 along with this work; if not, write to the Free Software Foundation,
17 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 18 *
19 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 21 * have any questions.
22 22 *
23 23 */
24 24
25 25 //** The DebugInformationRecorder collects debugging information
26 26 // for a compiled method.
27 27 // Debugging information is used for:
28 28 // - garbage collecting compiled frames
29 29 // - stack tracing across compiled frames
30 30 // - deoptimizating compiled frames
31 31 //
32 32 // The implementation requires the compiler to use the recorder
33 33 // in the following order:
34 34 // 1) Describe debug information for safepoints at increasing addresses.
35 35 // a) Add safepoint entry (use add_safepoint or add_non_safepoint)
36 36 // b) Describe scopes for that safepoint
37 37 // - create locals if needed (use create_scope_values)
38 38 // - create expressions if needed (use create_scope_values)
39 39 // - create monitor stack if needed (use create_monitor_values)
40 40 // - describe scope (use describe_scope)
41 41 // "repeat last four steps for all scopes"
42 42 // "outer most scope first and inner most scope last"
43 43 // NB: nodes from create_scope_values and create_locations
44 44 // can be reused for simple sharing.
45 45 // - mark the end of the scopes (end_safepoint or end_non_safepoint)
46 46 // 2) Use oop_size, data_size, pcs_size to create the nmethod and
47 47 // finally migrate the debugging information into the nmethod
48 48 // by calling copy_to.
49 49
50 50 class DebugToken; // Opaque datatype for stored:
51 51 // - GrowableArray<ScopeValue*>
52 52 // - GrowableArray<MonitorValue*>
53 53
54 54 // Alias for InvocationEntryBci.
55 55 // Both constants are used for a pseudo-BCI which refers
56 56 // to the state just _before_ a method is entered.
57 57 // SynchronizationEntryBCI is used where the emphasis
58 58 // is on the implicit monitorenter of a synchronized method.
59 59 const int SynchronizationEntryBCI = InvocationEntryBci;
60 60
61 61 class DIR_Chunk; // private class, a nugget of collected information
62 62
63 63 class DebugInformationRecorder: public ResourceObj {
64 64 public:
65 65 // constructor
66 66 DebugInformationRecorder(OopRecorder* oop_recorder);
67 67
68 68 // adds an oopmap at a specific offset
69 69 void add_oopmap(int pc_offset, OopMap* map);
70 70
71 71 // adds a jvm mapping at pc-offset, for a safepoint only
72 72 void add_safepoint(int pc_offset, OopMap* map);
73 73
74 74 // adds a jvm mapping at pc-offset, for a non-safepoint (profile point)
75 75 void add_non_safepoint(int pc_offset);
76 76
77 77 // Describes debugging information for a scope at the given pc_offset.
78 78 // Calls must be in non-decreasing order of pc_offset.
79 79 // If there are several calls at a single pc_offset,
80 80 // then they occur in the same order as they were performed by the JVM,
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81 81 // with the most recent (innermost) call being described last.
82 82 // For a safepoint, the pc_offset must have been mentioned
83 83 // previously by add_safepoint.
84 84 // Otherwise, the pc_offset must have been mentioned previously
85 85 // by add_non_safepoint, and the locals, expressions, and monitors
86 86 // must all be null.
87 87 void describe_scope(int pc_offset,
88 88 ciMethod* method,
89 89 int bci,
90 90 bool reexecute,
91 + bool is_method_handle_invoke = false,
91 92 DebugToken* locals = NULL,
92 93 DebugToken* expressions = NULL,
93 94 DebugToken* monitors = NULL);
94 95
95 96
96 97 void dump_object_pool(GrowableArray<ScopeValue*>* objects);
97 98
98 99 // This call must follow every add_safepoint,
99 100 // after any intervening describe_scope calls.
100 101 void end_safepoint(int pc_offset) { end_scopes(pc_offset, true); }
101 102 void end_non_safepoint(int pc_offset) { end_scopes(pc_offset, false); }
102 103
103 104 // helper fuctions for describe_scope to enable sharing
104 105 DebugToken* create_scope_values(GrowableArray<ScopeValue*>* values);
105 106 DebugToken* create_monitor_values(GrowableArray<MonitorValue*>* monitors);
106 107
107 108 // returns the size of the generated scopeDescs.
108 109 int data_size();
109 110 int pcs_size();
110 111 int oop_size() { return oop_recorder()->oop_size(); }
111 112
112 113 // copy the generated debugging information to nmethod
113 114 void copy_to(nmethod* nm);
114 115
115 116 // verifies the debug information
116 117 void verify(const nmethod* code);
117 118
118 119 static void print_statistics() PRODUCT_RETURN;
119 120
120 121 // Method for setting oopmaps to temporarily preserve old handling of oopmaps
121 122 OopMapSet *_oopmaps;
122 123 void set_oopmaps(OopMapSet *oopmaps) { _oopmaps = oopmaps; }
123 124
124 125 OopRecorder* oop_recorder() { return _oop_recorder; }
125 126
126 127 int last_pc_offset() { return last_pc()->pc_offset(); }
127 128
128 129 bool recording_non_safepoints() { return _recording_non_safepoints; }
129 130
130 131 private:
131 132 friend class ScopeDesc;
132 133 friend class vframeStreamCommon;
133 134 friend class DIR_Chunk;
134 135
135 136 // True if we are recording non-safepoint scopes.
136 137 // This flag is set if DebugNonSafepoints is true, or if
137 138 // JVMTI post_compiled_method_load events are enabled.
138 139 const bool _recording_non_safepoints;
139 140
140 141 DebugInfoWriteStream* _stream;
141 142
142 143 DebugInfoWriteStream* stream() const { return _stream; }
143 144
144 145 OopRecorder* _oop_recorder;
145 146
146 147 // Scopes that have been described so far.
147 148 GrowableArray<DIR_Chunk*>* _all_chunks;
148 149 GrowableArray<DIR_Chunk*>* _shared_chunks;
149 150 DIR_Chunk* _next_chunk;
150 151 DIR_Chunk* _next_chunk_limit;
151 152
152 153 #ifdef ASSERT
153 154 enum { rs_null, rs_safepoint, rs_non_safepoint };
154 155 int _recording_state;
155 156 #endif
156 157
157 158 PcDesc* _pcs;
158 159 int _pcs_size;
159 160 int _pcs_length;
160 161 // Note: Would use GrowableArray<PcDesc>, but structs are not supported.
161 162
162 163 // PC of most recent real safepoint before the current one,
163 164 // updated after end_scopes.
164 165 int _prev_safepoint_pc;
165 166
166 167 PcDesc* last_pc() {
167 168 guarantee(_pcs_length > 0, "a safepoint must be declared already");
168 169 return &_pcs[_pcs_length-1];
169 170 }
170 171 PcDesc* prev_pc() {
171 172 guarantee(_pcs_length > 1, "a safepoint must be declared already");
172 173 return &_pcs[_pcs_length-2];
173 174 }
174 175 void add_new_pc_offset(int pc_offset);
175 176 void end_scopes(int pc_offset, bool is_safepoint);
176 177
177 178 int serialize_monitor_values(GrowableArray<MonitorValue*>* monitors);
178 179 int serialize_scope_values(GrowableArray<ScopeValue*>* values);
179 180 int find_sharable_decode_offset(int stream_offset);
180 181
181 182 public:
182 183 enum { serialized_null = 0 };
183 184 };
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