Mercurial > hg > truffle
annotate src/share/vm/code/debugInfoRec.hpp @ 7046:b6a8f2d23057
VM support for deferred reads and writes: ScopeDesc, DebugInfo, DebugInfoRecorder
| author | Lukas Stadler <lukas.stadler@jku.at> |
|---|---|
| date | Tue, 27 Nov 2012 13:43:04 +0100 |
| parents | e522a00b91aa |
| children | 0b646334c5f7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_CODE_DEBUGINFOREC_HPP |
| 26 #define SHARE_VM_CODE_DEBUGINFOREC_HPP | |
| 27 | |
| 28 #include "ci/ciClassList.hpp" | |
| 29 #include "ci/ciInstanceKlass.hpp" | |
| 30 #include "ci/ciMethod.hpp" | |
| 31 #include "code/debugInfo.hpp" | |
| 32 #include "code/location.hpp" | |
| 33 #include "code/pcDesc.hpp" | |
| 34 #include "compiler/oopMap.hpp" | |
| 35 #include "oops/oop.hpp" | |
| 36 #include "utilities/growableArray.hpp" | |
| 37 | |
| 0 | 38 //** The DebugInformationRecorder collects debugging information |
| 39 // for a compiled method. | |
| 40 // Debugging information is used for: | |
| 41 // - garbage collecting compiled frames | |
| 42 // - stack tracing across compiled frames | |
| 43 // - deoptimizating compiled frames | |
| 44 // | |
| 45 // The implementation requires the compiler to use the recorder | |
| 46 // in the following order: | |
| 47 // 1) Describe debug information for safepoints at increasing addresses. | |
| 48 // a) Add safepoint entry (use add_safepoint or add_non_safepoint) | |
| 49 // b) Describe scopes for that safepoint | |
| 50 // - create locals if needed (use create_scope_values) | |
| 51 // - create expressions if needed (use create_scope_values) | |
| 52 // - create monitor stack if needed (use create_monitor_values) | |
| 53 // - describe scope (use describe_scope) | |
| 54 // "repeat last four steps for all scopes" | |
| 55 // "outer most scope first and inner most scope last" | |
| 56 // NB: nodes from create_scope_values and create_locations | |
| 57 // can be reused for simple sharing. | |
| 58 // - mark the end of the scopes (end_safepoint or end_non_safepoint) | |
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59 // 2) Use oop_size, metadata_size, data_size, pcs_size to create the nmethod |
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60 // and finally migrate the debugging information into the nmethod |
| 0 | 61 // by calling copy_to. |
| 62 | |
| 63 class DebugToken; // Opaque datatype for stored: | |
| 64 // - GrowableArray<ScopeValue*> | |
| 65 // - GrowableArray<MonitorValue*> | |
| 66 | |
| 67 // Alias for InvocationEntryBci. | |
| 68 // Both constants are used for a pseudo-BCI which refers | |
| 69 // to the state just _before_ a method is entered. | |
| 70 // SynchronizationEntryBCI is used where the emphasis | |
| 71 // is on the implicit monitorenter of a synchronized method. | |
| 72 const int SynchronizationEntryBCI = InvocationEntryBci; | |
| 73 | |
| 74 class DIR_Chunk; // private class, a nugget of collected information | |
| 75 | |
| 76 class DebugInformationRecorder: public ResourceObj { | |
| 77 public: | |
| 78 // constructor | |
| 79 DebugInformationRecorder(OopRecorder* oop_recorder); | |
| 80 | |
| 81 // adds an oopmap at a specific offset | |
| 82 void add_oopmap(int pc_offset, OopMap* map); | |
| 83 | |
| 84 // adds a jvm mapping at pc-offset, for a safepoint only | |
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85 void add_safepoint(int pc_offset, jlong leaf_graph_id, OopMap* map); |
| 0 | 86 |
| 87 // adds a jvm mapping at pc-offset, for a non-safepoint (profile point) | |
| 88 void add_non_safepoint(int pc_offset); | |
| 89 | |
| 90 // Describes debugging information for a scope at the given pc_offset. | |
| 91 // Calls must be in non-decreasing order of pc_offset. | |
| 92 // If there are several calls at a single pc_offset, | |
| 93 // then they occur in the same order as they were performed by the JVM, | |
| 94 // with the most recent (innermost) call being described last. | |
| 95 // For a safepoint, the pc_offset must have been mentioned | |
| 96 // previously by add_safepoint. | |
| 97 // Otherwise, the pc_offset must have been mentioned previously | |
| 98 // by add_non_safepoint, and the locals, expressions, and monitors | |
| 99 // must all be null. | |
| 100 void describe_scope(int pc_offset, | |
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101 methodHandle methodH, |
| 0 | 102 ciMethod* method, |
| 103 int bci, | |
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104 bool reexecute, |
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105 bool rethrow_exception = false, |
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106 bool is_method_handle_invoke = false, |
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107 bool return_oop = false, |
| 0 | 108 DebugToken* locals = NULL, |
| 109 DebugToken* expressions = NULL, | |
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110 DebugToken* monitors = NULL |
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111 #ifdef GRAAL |
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112 , DebugToken* deferred_writes = NULL |
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113 #endif // GRAAL |
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114 ); |
| 0 | 115 |
| 116 | |
| 117 void dump_object_pool(GrowableArray<ScopeValue*>* objects); | |
| 118 | |
| 119 // This call must follow every add_safepoint, | |
| 120 // after any intervening describe_scope calls. | |
| 121 void end_safepoint(int pc_offset) { end_scopes(pc_offset, true); } | |
| 122 void end_non_safepoint(int pc_offset) { end_scopes(pc_offset, false); } | |
| 123 | |
| 124 // helper fuctions for describe_scope to enable sharing | |
| 125 DebugToken* create_scope_values(GrowableArray<ScopeValue*>* values); | |
| 126 DebugToken* create_monitor_values(GrowableArray<MonitorValue*>* monitors); | |
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127 #ifdef GRAAL |
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128 DebugToken* create_deferred_writes(GrowableArray<DeferredWriteValue*>* deferred_writes); |
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129 #endif // GRAAL |
| 0 | 130 |
| 131 // returns the size of the generated scopeDescs. | |
| 132 int data_size(); | |
| 133 int pcs_size(); | |
| 134 int oop_size() { return oop_recorder()->oop_size(); } | |
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135 int metadata_size() { return oop_recorder()->metadata_size(); } |
| 0 | 136 |
| 137 // copy the generated debugging information to nmethod | |
| 138 void copy_to(nmethod* nm); | |
| 139 | |
| 140 // verifies the debug information | |
| 141 void verify(const nmethod* code); | |
| 142 | |
| 143 static void print_statistics() PRODUCT_RETURN; | |
| 144 | |
| 145 // Method for setting oopmaps to temporarily preserve old handling of oopmaps | |
| 146 OopMapSet *_oopmaps; | |
| 147 void set_oopmaps(OopMapSet *oopmaps) { _oopmaps = oopmaps; } | |
| 148 | |
| 149 OopRecorder* oop_recorder() { return _oop_recorder; } | |
| 150 | |
| 151 int last_pc_offset() { return last_pc()->pc_offset(); } | |
| 152 | |
| 153 bool recording_non_safepoints() { return _recording_non_safepoints; } | |
| 154 | |
| 155 private: | |
| 156 friend class ScopeDesc; | |
| 157 friend class vframeStreamCommon; | |
| 158 friend class DIR_Chunk; | |
| 159 | |
| 160 // True if we are recording non-safepoint scopes. | |
| 161 // This flag is set if DebugNonSafepoints is true, or if | |
| 162 // JVMTI post_compiled_method_load events are enabled. | |
| 163 const bool _recording_non_safepoints; | |
| 164 | |
| 165 DebugInfoWriteStream* _stream; | |
| 166 | |
| 167 DebugInfoWriteStream* stream() const { return _stream; } | |
| 168 | |
| 169 OopRecorder* _oop_recorder; | |
| 170 | |
| 171 // Scopes that have been described so far. | |
| 172 GrowableArray<DIR_Chunk*>* _all_chunks; | |
| 173 GrowableArray<DIR_Chunk*>* _shared_chunks; | |
| 174 DIR_Chunk* _next_chunk; | |
| 175 DIR_Chunk* _next_chunk_limit; | |
| 176 | |
| 177 #ifdef ASSERT | |
| 178 enum { rs_null, rs_safepoint, rs_non_safepoint }; | |
| 179 int _recording_state; | |
| 180 #endif | |
| 181 | |
| 182 PcDesc* _pcs; | |
| 183 int _pcs_size; | |
| 184 int _pcs_length; | |
| 185 // Note: Would use GrowableArray<PcDesc>, but structs are not supported. | |
| 186 | |
| 187 // PC of most recent real safepoint before the current one, | |
| 188 // updated after end_scopes. | |
| 189 int _prev_safepoint_pc; | |
| 190 | |
| 191 PcDesc* last_pc() { | |
| 192 guarantee(_pcs_length > 0, "a safepoint must be declared already"); | |
| 193 return &_pcs[_pcs_length-1]; | |
| 194 } | |
| 195 PcDesc* prev_pc() { | |
| 196 guarantee(_pcs_length > 1, "a safepoint must be declared already"); | |
| 197 return &_pcs[_pcs_length-2]; | |
| 198 } | |
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199 void add_new_pc_offset(int pc_offset, jlong leaf_graph_id = -1); |
| 0 | 200 void end_scopes(int pc_offset, bool is_safepoint); |
| 201 | |
| 202 int serialize_monitor_values(GrowableArray<MonitorValue*>* monitors); | |
| 203 int serialize_scope_values(GrowableArray<ScopeValue*>* values); | |
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204 #ifdef GRAAL |
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205 int serialize_deferred_writes(GrowableArray<DeferredWriteValue*>* deferred_writes); |
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206 #endif // GRAAL |
| 0 | 207 int find_sharable_decode_offset(int stream_offset); |
| 208 | |
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209 #ifndef PRODUCT |
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210 bool recorders_frozen(); |
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211 void mark_recorders_frozen(); |
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212 #endif // PRODUCT |
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213 |
| 0 | 214 public: |
| 215 enum { serialized_null = 0 }; | |
| 216 }; | |
| 1972 | 217 |
| 218 #endif // SHARE_VM_CODE_DEBUGINFOREC_HPP |