1 /* 2 * Copyright (c) 2001, 2011, 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_CI_CIMETHODDATA_HPP 26 #define SHARE_VM_CI_CIMETHODDATA_HPP 27 28 #include "ci/ciClassList.hpp" 29 #include "ci/ciKlass.hpp" 30 #include "ci/ciObject.hpp" 31 #include "ci/ciUtilities.hpp" 32 #include "oops/methodDataOop.hpp" 33 #include "oops/oop.inline.hpp" 34 35 class ciBitData; 36 class ciCounterData; 37 class ciJumpData; 38 class ciReceiverTypeData; 39 class ciRetData; 40 class ciBranchData; 41 class ciArrayData; 42 class ciMultiBranchData; 43 class ciArgInfoData; 44 45 typedef ProfileData ciProfileData; 46 47 class ciBitData : public BitData { 48 public: 49 ciBitData(DataLayout* layout) : BitData(layout) {}; 50 }; 51 52 class ciCounterData : public CounterData { 53 public: 54 ciCounterData(DataLayout* layout) : CounterData(layout) {}; 55 }; 56 57 class ciJumpData : public JumpData { 58 public: 59 ciJumpData(DataLayout* layout) : JumpData(layout) {}; 60 }; 61 62 class ciReceiverTypeData : public ReceiverTypeData { 63 public: 64 ciReceiverTypeData(DataLayout* layout) : ReceiverTypeData(layout) {}; 65 66 void set_receiver(uint row, ciKlass* recv) { 67 assert((uint)row < row_limit(), "oob"); 68 set_intptr_at(receiver0_offset + row * receiver_type_row_cell_count, 69 (intptr_t) recv); 70 } 71 72 ciKlass* receiver(uint row) { 73 assert((uint)row < row_limit(), "oob"); 74 ciObject* recv = (ciObject*)intptr_at(receiver0_offset + row * receiver_type_row_cell_count); 75 assert(recv == NULL || recv->is_klass(), "wrong type"); 76 return (ciKlass*)recv; 77 } 78 79 // Copy & translate from oop based ReceiverTypeData 80 virtual void translate_from(ProfileData* data) { 81 translate_receiver_data_from(data); 82 } 83 void translate_receiver_data_from(ProfileData* data); 84 #ifndef PRODUCT 85 void print_data_on(outputStream* st); 86 void print_receiver_data_on(outputStream* st); 87 #endif 88 }; 89 90 class ciVirtualCallData : public VirtualCallData { 91 // Fake multiple inheritance... It's a ciReceiverTypeData also. 92 ciReceiverTypeData* rtd_super() { return (ciReceiverTypeData*) this; } 93 94 public: 95 ciVirtualCallData(DataLayout* layout) : VirtualCallData(layout) {}; 96 97 void set_receiver(uint row, ciKlass* recv) { 98 rtd_super()->set_receiver(row, recv); 99 } 100 101 ciKlass* receiver(uint row) { 102 return rtd_super()->receiver(row); 103 } 104 105 // Copy & translate from oop based VirtualCallData 106 virtual void translate_from(ProfileData* data) { 107 rtd_super()->translate_receiver_data_from(data); 108 } 109 #ifndef PRODUCT 110 void print_data_on(outputStream* st); 111 #endif 112 }; 113 114 115 class ciRetData : public RetData { 116 public: 117 ciRetData(DataLayout* layout) : RetData(layout) {}; 118 }; 119 120 class ciBranchData : public BranchData { 121 public: 122 ciBranchData(DataLayout* layout) : BranchData(layout) {}; 123 }; 124 125 class ciArrayData : public ArrayData { 126 public: 127 ciArrayData(DataLayout* layout) : ArrayData(layout) {}; 128 }; 129 130 class ciMultiBranchData : public MultiBranchData { 131 public: 132 ciMultiBranchData(DataLayout* layout) : MultiBranchData(layout) {}; 133 }; 134 135 class ciArgInfoData : public ArgInfoData { 136 public: 137 ciArgInfoData(DataLayout* layout) : ArgInfoData(layout) {}; 138 }; 139 140 // ciMethodData 141 // 142 // This class represents a methodDataOop in the HotSpot virtual 143 // machine. 144 145 class ciMethodData : public ciObject { 146 CI_PACKAGE_ACCESS 147 148 private: 149 // Size in bytes 150 int _data_size; 151 int _extra_data_size; 152 153 // Data entries 154 intptr_t* _data; 155 156 // Cached hint for data_before() 157 int _hint_di; 158 159 // Is data attached? And is it mature? 160 enum { empty_state, immature_state, mature_state }; 161 u_char _state; 162 163 // Set this true if empty extra_data slots are ever witnessed. 164 u_char _saw_free_extra_data; 165 166 // Support for interprocedural escape analysis 167 intx _eflags; // flags on escape information 168 intx _arg_local; // bit set of non-escaping arguments 169 intx _arg_stack; // bit set of stack-allocatable arguments 170 intx _arg_returned; // bit set of returned arguments 171 172 // Maturity of the oop when the snapshot is taken. 173 int _current_mileage; 174 175 // These counters hold the age of MDO in tiered. In tiered we can have the same method 176 // running at different compilation levels concurrently. So, in order to precisely measure 177 // its maturity we need separate counters. 178 int _invocation_counter; 179 int _backedge_counter; 180 181 // Coherent snapshot of original header. 182 methodDataOopDesc _orig; 183 184 ciMethodData(methodDataHandle h_md); 185 ciMethodData(); 186 187 // Accessors 188 int data_size() const { return _data_size; } 189 int extra_data_size() const { return _extra_data_size; } 190 intptr_t * data() const { return _data; } 191 192 methodDataOop get_methodDataOop() const { 193 if (handle() == NULL) return NULL; 194 methodDataOop mdo = (methodDataOop)get_oop(); 195 assert(mdo != NULL, "illegal use of unloaded method data"); 196 return mdo; 197 } 198 199 const char* type_string() { return "ciMethodData"; } 200 201 void print_impl(outputStream* st); 202 203 DataLayout* data_layout_at(int data_index) const { 204 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); 205 return (DataLayout*) (((address)_data) + data_index); 206 } 207 208 bool out_of_bounds(int data_index) { 209 return data_index >= data_size(); 210 } 211 212 // hint accessors 213 int hint_di() const { return _hint_di; } 214 void set_hint_di(int di) { 215 assert(!out_of_bounds(di), "hint_di out of bounds"); 216 _hint_di = di; 217 } 218 ciProfileData* data_before(int bci) { 219 // avoid SEGV on this edge case 220 if (data_size() == 0) 221 return NULL; 222 int hint = hint_di(); 223 if (data_layout_at(hint)->bci() <= bci) 224 return data_at(hint); 225 return first_data(); 226 } 227 228 229 // What is the index of the first data entry? 230 int first_di() { return 0; } 231 232 ciArgInfoData *arg_info() const; 233 234 public: 235 bool is_method_data() { return true; } 236 237 void set_mature() { _state = mature_state; } 238 239 bool is_empty() { return _state == empty_state; } 240 bool is_mature() { return _state == mature_state; } 241 242 int creation_mileage() { return _orig.creation_mileage(); } 243 int current_mileage() { return _current_mileage; } 244 245 int invocation_count() { return _invocation_counter; } 246 int backedge_count() { return _backedge_counter; } 247 // Transfer information about the method to methodDataOop. 248 // would_profile means we would like to profile this method, 249 // meaning it's not trivial. 250 void set_would_profile(bool p); 251 // Also set the numer of loops and blocks in the method. 252 // Again, this is used to determine if a method is trivial. 253 void set_compilation_stats(short loops, short blocks); 254 255 void load_data(); 256 257 // Convert a dp (data pointer) to a di (data index). 258 int dp_to_di(address dp) { 259 return dp - ((address)_data); 260 } 261 262 // Get the data at an arbitrary (sort of) data index. 263 ciProfileData* data_at(int data_index); 264 265 // Walk through the data in order. 266 ciProfileData* first_data() { return data_at(first_di()); } 267 ciProfileData* next_data(ciProfileData* current); 268 bool is_valid(ciProfileData* current) { return current != NULL; } 269 270 // Get the data at an arbitrary bci, or NULL if there is none. 271 ciProfileData* bci_to_data(int bci); 272 ciProfileData* bci_to_extra_data(int bci, bool create_if_missing); 273 274 uint overflow_trap_count() const { 275 return _orig.overflow_trap_count(); 276 } 277 uint overflow_recompile_count() const { 278 return _orig.overflow_recompile_count(); 279 } 280 uint decompile_count() const { 281 return _orig.decompile_count(); 282 } 283 uint trap_count(int reason) const { 284 return _orig.trap_count(reason); 285 } 286 uint trap_reason_limit() const { return _orig.trap_reason_limit(); } 287 uint trap_count_limit() const { return _orig.trap_count_limit(); } 288 289 // Helpful query functions that decode trap_state. 290 int has_trap_at(ciProfileData* data, int reason); 291 int has_trap_at(int bci, int reason) { 292 return has_trap_at(bci_to_data(bci), reason); 293 } 294 int trap_recompiled_at(ciProfileData* data); 295 int trap_recompiled_at(int bci) { 296 return trap_recompiled_at(bci_to_data(bci)); 297 } 298 299 void clear_escape_info(); 300 bool has_escape_info(); 301 void update_escape_info(); 302 303 void set_eflag(methodDataOopDesc::EscapeFlag f); 304 void clear_eflag(methodDataOopDesc::EscapeFlag f); 305 bool eflag_set(methodDataOopDesc::EscapeFlag f) const; 306 307 void set_arg_local(int i); 308 void set_arg_stack(int i); 309 void set_arg_returned(int i); 310 void set_arg_modified(int arg, uint val); 311 312 bool is_arg_local(int i) const; 313 bool is_arg_stack(int i) const; 314 bool is_arg_returned(int i) const; 315 uint arg_modified(int arg) const; 316 317 // Code generation helper 318 ByteSize offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data); 319 int byte_offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data) { return in_bytes(offset_of_slot(data, slot_offset_in_data)); } 320 321 #ifndef PRODUCT 322 // printing support for method data 323 void print(); 324 void print_data_on(outputStream* st); 325 #endif 326 }; 327 328 #endif // SHARE_VM_CI_CIMETHODDATA_HPP