Mercurial > hg > truffle
annotate src/share/vm/runtime/deoptimization.hpp @ 8804:91bf0bdae37b
8008217: CDS: Class data sharing limits the malloc heap on Solaris
Summary: In 64bit VM move CDS archive address to 32G on all platforms using new flag SharedBaseAddress. In 32bit VM set CDS archive address to 3Gb on Linux and let other OSs pick the address.
Reviewed-by: kvn, dcubed, zgu, hseigel
| author | coleenp |
|---|---|
| date | Wed, 20 Mar 2013 08:04:54 -0400 |
| parents | da91efe96a93 |
| children | e522a00b91aa 63a4eb8bcd23 b8413a9cbb84 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 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_RUNTIME_DEOPTIMIZATION_HPP |
| 26 #define SHARE_VM_RUNTIME_DEOPTIMIZATION_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "runtime/frame.inline.hpp" | |
| 30 | |
| 0 | 31 class ProfileData; |
| 32 class vframeArray; | |
| 33 class MonitorValue; | |
| 34 class ObjectValue; | |
| 35 | |
| 36 class Deoptimization : AllStatic { | |
| 3939 | 37 friend class VMStructs; |
| 38 | |
| 0 | 39 public: |
| 40 // What condition caused the deoptimization? | |
| 41 enum DeoptReason { | |
| 42 Reason_many = -1, // indicates presence of several reasons | |
| 43 Reason_none = 0, // indicates absence of a relevant deopt. | |
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44 // Next 7 reasons are recorded per bytecode in DataLayout::trap_bits |
| 0 | 45 Reason_null_check, // saw unexpected null or zero divisor (@bci) |
| 46 Reason_null_assert, // saw unexpected non-null or non-zero (@bci) | |
| 47 Reason_range_check, // saw unexpected array index (@bci) | |
| 48 Reason_class_check, // saw unexpected object class (@bci) | |
| 49 Reason_array_check, // saw unexpected array class (aastore @bci) | |
| 50 Reason_intrinsic, // saw unexpected operand to intrinsic (@bci) | |
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51 Reason_bimorphic, // saw unexpected object class in bimorphic inlining (@bci) |
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52 |
| 0 | 53 Reason_unloaded, // unloaded class or constant pool entry |
| 54 Reason_uninitialized, // bad class state (uninitialized) | |
| 55 Reason_unreached, // code is not reached, compiler | |
| 56 Reason_unhandled, // arbitrary compiler limitation | |
| 57 Reason_constraint, // arbitrary runtime constraint violated | |
| 58 Reason_div0_check, // a null_check due to division by zero | |
| 59 Reason_age, // nmethod too old; tier threshold reached | |
| 1172 | 60 Reason_predicate, // compiler generated predicate failed |
| 3345 | 61 Reason_loop_limit_check, // compiler generated loop limits check failed |
| 0 | 62 Reason_LIMIT, |
| 63 // Note: Keep this enum in sync. with _trap_reason_name. | |
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64 Reason_RECORDED_LIMIT = Reason_bimorphic // some are not recorded per bc |
| 0 | 65 // Note: Reason_RECORDED_LIMIT should be < 8 to fit into 3 bits of |
| 66 // DataLayout::trap_bits. This dependency is enforced indirectly | |
| 67 // via asserts, to avoid excessive direct header-to-header dependencies. | |
| 68 // See Deoptimization::trap_state_reason and class DataLayout. | |
| 69 }; | |
| 70 | |
| 71 // What action must be taken by the runtime? | |
| 72 enum DeoptAction { | |
| 73 Action_none, // just interpret, do not invalidate nmethod | |
| 74 Action_maybe_recompile, // recompile the nmethod; need not invalidate | |
| 75 Action_reinterpret, // invalidate the nmethod, reset IC, maybe recompile | |
| 76 Action_make_not_entrant, // invalidate the nmethod, recompile (probably) | |
| 77 Action_make_not_compilable, // invalidate the nmethod and do not compile | |
| 78 Action_LIMIT | |
| 79 // Note: Keep this enum in sync. with _trap_action_name. | |
| 80 }; | |
| 81 | |
| 82 enum { | |
| 83 _action_bits = 3, | |
| 3345 | 84 _reason_bits = 5, |
| 0 | 85 _action_shift = 0, |
| 86 _reason_shift = _action_shift+_action_bits, | |
| 87 BC_CASE_LIMIT = PRODUCT_ONLY(1) NOT_PRODUCT(4) // for _deoptimization_hist | |
| 88 }; | |
| 89 | |
| 90 enum UnpackType { | |
| 91 Unpack_deopt = 0, // normal deoptimization, use pc computed in unpack_vframe_on_stack | |
| 92 Unpack_exception = 1, // exception is pending | |
| 93 Unpack_uncommon_trap = 2, // redo last byte code (C2 only) | |
| 94 Unpack_reexecute = 3 // reexecute bytecode (C1 only) | |
| 95 }; | |
| 96 | |
| 97 // Checks all compiled methods. Invalid methods are deleted and | |
| 98 // corresponding activations are deoptimized. | |
| 99 static int deoptimize_dependents(); | |
| 100 | |
| 101 // Deoptimizes a frame lazily. nmethod gets patched deopt happens on return to the frame | |
| 102 static void deoptimize(JavaThread* thread, frame fr, RegisterMap *reg_map); | |
| 103 | |
| 104 private: | |
| 105 // Does the actual work for deoptimizing a single frame | |
| 106 static void deoptimize_single_frame(JavaThread* thread, frame fr); | |
| 107 | |
| 108 // Helper function to revoke biases of all monitors in frame if UseBiasedLocking | |
| 109 // is enabled | |
| 110 static void revoke_biases_of_monitors(JavaThread* thread, frame fr, RegisterMap* map); | |
| 111 // Helper function to revoke biases of all monitors in frames | |
| 112 // executing in a particular CodeBlob if UseBiasedLocking is enabled | |
| 113 static void revoke_biases_of_monitors(CodeBlob* cb); | |
| 114 | |
| 115 #ifdef COMPILER2 | |
| 116 // Support for restoring non-escaping objects | |
| 117 static bool realloc_objects(JavaThread* thread, frame* fr, GrowableArray<ScopeValue*>* objects, TRAPS); | |
| 118 static void reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type); | |
| 119 static void reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj); | |
| 120 static void reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects); | |
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121 static void relock_objects(GrowableArray<MonitorInfo*>* monitors, JavaThread* thread); |
| 0 | 122 NOT_PRODUCT(static void print_objects(GrowableArray<ScopeValue*>* objects);) |
| 123 #endif // COMPILER2 | |
| 124 | |
| 125 public: | |
| 126 static vframeArray* create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk); | |
| 127 | |
| 128 // Interface used for unpacking deoptimized frames | |
| 129 | |
| 130 // UnrollBlock is returned by fetch_unroll_info() to the deoptimization handler (blob). | |
| 131 // This is only a CheapObj to ease debugging after a deopt failure | |
| 6197 | 132 class UnrollBlock : public CHeapObj<mtCompiler> { |
| 0 | 133 private: |
| 134 int _size_of_deoptimized_frame; // Size, in bytes, of current deoptimized frame | |
| 135 int _caller_adjustment; // Adjustment, in bytes, to caller's SP by initial interpreted frame | |
| 136 int _number_of_frames; // Number frames to unroll | |
| 137 int _total_frame_sizes; // Total of number*sizes frames | |
| 138 intptr_t* _frame_sizes; // Array of frame sizes, in bytes, for unrolling the stack | |
| 139 address* _frame_pcs; // Array of frame pc's, in bytes, for unrolling the stack | |
| 140 intptr_t* _register_block; // Block for storing callee-saved registers. | |
| 141 BasicType _return_type; // Tells if we have to restore double or long return value | |
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142 intptr_t _initial_info; // Platform dependent data for the sender frame (was FP on x86) |
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143 int _caller_actual_parameters; // The number of actual arguments at the |
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144 // interpreted caller of the deoptimized frame |
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145 |
| 0 | 146 // The following fields are used as temps during the unpacking phase |
| 147 // (which is tight on registers, especially on x86). They really ought | |
| 148 // to be PD variables but that involves moving this class into its own | |
| 149 // file to use the pd include mechanism. Maybe in a later cleanup ... | |
| 150 intptr_t _counter_temp; // SHOULD BE PD VARIABLE (x86 frame count temp) | |
| 151 intptr_t _unpack_kind; // SHOULD BE PD VARIABLE (x86 unpack kind) | |
| 152 intptr_t _sender_sp_temp; // SHOULD BE PD VARIABLE (x86 sender_sp) | |
| 153 public: | |
| 154 // Constructor | |
| 155 UnrollBlock(int size_of_deoptimized_frame, | |
| 156 int caller_adjustment, | |
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157 int caller_actual_parameters, |
| 0 | 158 int number_of_frames, |
| 159 intptr_t* frame_sizes, | |
| 160 address* frames_pcs, | |
| 161 BasicType return_type); | |
| 162 ~UnrollBlock(); | |
| 163 | |
| 164 // Returns where a register is located. | |
| 165 intptr_t* value_addr_at(int register_number) const; | |
| 166 | |
| 167 // Accessors | |
| 168 intptr_t* frame_sizes() const { return _frame_sizes; } | |
| 169 int number_of_frames() const { return _number_of_frames; } | |
| 170 address* frame_pcs() const { return _frame_pcs ; } | |
| 171 | |
| 172 // Returns the total size of frames | |
| 173 int size_of_frames() const; | |
| 174 | |
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175 void set_initial_info(intptr_t info) { _initial_info = info; } |
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176 |
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177 int caller_actual_parameters() const { return _caller_actual_parameters; } |
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178 |
| 0 | 179 // Accessors used by the code generator for the unpack stub. |
| 180 static int size_of_deoptimized_frame_offset_in_bytes() { return offset_of(UnrollBlock, _size_of_deoptimized_frame); } | |
| 181 static int caller_adjustment_offset_in_bytes() { return offset_of(UnrollBlock, _caller_adjustment); } | |
| 182 static int number_of_frames_offset_in_bytes() { return offset_of(UnrollBlock, _number_of_frames); } | |
| 183 static int frame_sizes_offset_in_bytes() { return offset_of(UnrollBlock, _frame_sizes); } | |
| 184 static int total_frame_sizes_offset_in_bytes() { return offset_of(UnrollBlock, _total_frame_sizes); } | |
| 185 static int frame_pcs_offset_in_bytes() { return offset_of(UnrollBlock, _frame_pcs); } | |
| 186 static int register_block_offset_in_bytes() { return offset_of(UnrollBlock, _register_block); } | |
| 187 static int return_type_offset_in_bytes() { return offset_of(UnrollBlock, _return_type); } | |
| 188 static int counter_temp_offset_in_bytes() { return offset_of(UnrollBlock, _counter_temp); } | |
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189 static int initial_info_offset_in_bytes() { return offset_of(UnrollBlock, _initial_info); } |
| 0 | 190 static int unpack_kind_offset_in_bytes() { return offset_of(UnrollBlock, _unpack_kind); } |
| 191 static int sender_sp_temp_offset_in_bytes() { return offset_of(UnrollBlock, _sender_sp_temp); } | |
| 192 | |
| 193 BasicType return_type() const { return _return_type; } | |
| 194 void print(); | |
| 195 }; | |
| 196 | |
| 197 //** Returns an UnrollBlock continuing information | |
| 198 // how to make room for the resulting interpreter frames. | |
| 199 // Called by assembly stub after execution has returned to | |
| 200 // deoptimized frame. | |
| 201 // @argument thread. Thread where stub_frame resides. | |
| 202 // @see OptoRuntime::deoptimization_fetch_unroll_info_C | |
| 203 static UnrollBlock* fetch_unroll_info(JavaThread* thread); | |
| 204 | |
| 205 //** Unpacks vframeArray onto execution stack | |
| 206 // Called by assembly stub after execution has returned to | |
| 207 // deoptimized frame and after the stack unrolling. | |
| 208 // @argument thread. Thread where stub_frame resides. | |
| 209 // @argument exec_mode. Determines how execution should be continuted in top frame. | |
| 210 // 0 means continue after current byte code | |
| 211 // 1 means exception has happened, handle exception | |
| 212 // 2 means reexecute current bytecode (for uncommon traps). | |
| 213 // @see OptoRuntime::deoptimization_unpack_frames_C | |
| 214 // Return BasicType of call return type, if any | |
| 215 static BasicType unpack_frames(JavaThread* thread, int exec_mode); | |
| 216 | |
| 217 // Cleans up deoptimization bits on thread after unpacking or in the | |
| 218 // case of an exception. | |
| 219 static void cleanup_deopt_info(JavaThread *thread, | |
| 220 vframeArray * array); | |
| 221 | |
| 222 // Restores callee saved values from deoptimized frame into oldest interpreter frame | |
| 223 // so caller of the deoptimized frame will get back the values it expects. | |
| 224 static void unwind_callee_save_values(frame* f, vframeArray* vframe_array); | |
| 225 | |
| 226 //** Performs an uncommon trap for compiled code. | |
| 227 // The top most compiler frame is converted into interpreter frames | |
| 228 static UnrollBlock* uncommon_trap(JavaThread* thread, jint unloaded_class_index); | |
| 229 // Helper routine that enters the VM and may block | |
| 230 static void uncommon_trap_inner(JavaThread* thread, jint unloaded_class_index); | |
| 231 | |
| 232 //** Deoptimizes the frame identified by id. | |
| 233 // Only called from VMDeoptimizeFrame | |
| 234 // @argument thread. Thread where stub_frame resides. | |
| 235 // @argument id. id of frame that should be deoptimized. | |
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236 static void deoptimize_frame_internal(JavaThread* thread, intptr_t* id); |
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237 |
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238 // If thread is not the current thread then execute |
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239 // VM_DeoptimizeFrame otherwise deoptimize directly. |
| 0 | 240 static void deoptimize_frame(JavaThread* thread, intptr_t* id); |
| 241 | |
| 242 // Statistics | |
| 243 static void gather_statistics(DeoptReason reason, DeoptAction action, | |
| 244 Bytecodes::Code bc = Bytecodes::_illegal); | |
| 245 static void print_statistics(); | |
| 246 | |
| 247 // How much room to adjust the last frame's SP by, to make space for | |
| 248 // the callee's interpreter frame (which expects locals to be next to | |
| 249 // incoming arguments) | |
| 250 static int last_frame_adjust(int callee_parameters, int callee_locals); | |
| 251 | |
| 252 // trap_request codes | |
| 253 static DeoptReason trap_request_reason(int trap_request) { | |
| 254 if (trap_request < 0) | |
| 255 return (DeoptReason) | |
| 256 ((~(trap_request) >> _reason_shift) & right_n_bits(_reason_bits)); | |
| 257 else | |
| 258 // standard reason for unloaded CP entry | |
| 259 return Reason_unloaded; | |
| 260 } | |
| 261 static DeoptAction trap_request_action(int trap_request) { | |
| 262 if (trap_request < 0) | |
| 263 return (DeoptAction) | |
| 264 ((~(trap_request) >> _action_shift) & right_n_bits(_action_bits)); | |
| 265 else | |
| 266 // standard action for unloaded CP entry | |
| 267 return _unloaded_action; | |
| 268 } | |
| 269 static int trap_request_index(int trap_request) { | |
| 270 if (trap_request < 0) | |
| 271 return -1; | |
| 272 else | |
| 273 return trap_request; | |
| 274 } | |
| 275 static int make_trap_request(DeoptReason reason, DeoptAction action, | |
| 276 int index = -1) { | |
| 277 assert((1 << _reason_bits) >= Reason_LIMIT, "enough bits"); | |
| 278 assert((1 << _action_bits) >= Action_LIMIT, "enough bits"); | |
| 279 int trap_request; | |
| 280 if (index != -1) | |
| 281 trap_request = index; | |
| 282 else | |
| 283 trap_request = (~(((reason) << _reason_shift) | |
| 284 + ((action) << _action_shift))); | |
| 285 assert(reason == trap_request_reason(trap_request), "valid reason"); | |
| 286 assert(action == trap_request_action(trap_request), "valid action"); | |
| 287 assert(index == trap_request_index(trap_request), "valid index"); | |
| 288 return trap_request; | |
| 289 } | |
| 290 | |
| 291 // The trap_state stored in a MDO is decoded here. | |
| 292 // It records two items of information. | |
| 293 // reason: If a deoptimization happened here, what its reason was, | |
| 294 // or if there were multiple deopts with differing reasons. | |
| 295 // recompiled: If a deoptimization here triggered a recompilation. | |
| 296 // Note that not all reasons are recorded per-bci. | |
| 297 static DeoptReason trap_state_reason(int trap_state); | |
| 298 static int trap_state_has_reason(int trap_state, int reason); | |
| 299 static int trap_state_add_reason(int trap_state, int reason); | |
| 300 static bool trap_state_is_recompiled(int trap_state); | |
| 301 static int trap_state_set_recompiled(int trap_state, bool z); | |
| 302 static const char* format_trap_state(char* buf, size_t buflen, | |
| 303 int trap_state); | |
| 304 | |
| 305 static bool reason_is_recorded_per_bytecode(DeoptReason reason) { | |
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306 return reason > Reason_none && reason <= Reason_RECORDED_LIMIT; |
| 0 | 307 } |
| 308 | |
| 309 static DeoptReason reason_recorded_per_bytecode_if_any(DeoptReason reason) { | |
| 310 if (reason_is_recorded_per_bytecode(reason)) | |
| 311 return reason; | |
| 312 else if (reason == Reason_div0_check) // null check due to divide-by-zero? | |
| 313 return Reason_null_check; // recorded per BCI as a null check | |
| 314 else | |
| 315 return Reason_none; | |
| 316 } | |
| 317 | |
| 318 static const char* trap_reason_name(int reason); | |
| 319 static const char* trap_action_name(int action); | |
| 320 // Format like reason='foo' action='bar' index='123'. | |
| 321 // This is suitable both for XML and for tty output. | |
| 322 static const char* format_trap_request(char* buf, size_t buflen, | |
| 323 int trap_request); | |
| 324 | |
| 325 static jint total_deoptimization_count(); | |
| 326 static jint deoptimization_count(DeoptReason reason); | |
| 327 | |
| 328 // JVMTI PopFrame support | |
| 329 | |
| 330 // Preserves incoming arguments to the popped frame when it is | |
| 331 // returning to a deoptimized caller | |
| 332 static void popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address); | |
| 333 | |
| 334 private: | |
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335 static MethodData* get_method_data(JavaThread* thread, methodHandle m, bool create_if_missing); |
| 0 | 336 // Update the mdo's count and per-BCI reason bits, returning previous state: |
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337 static ProfileData* query_update_method_data(MethodData* trap_mdo, |
| 0 | 338 int trap_bci, |
| 339 DeoptReason reason, | |
| 340 //outputs: | |
| 341 uint& ret_this_trap_count, | |
| 342 bool& ret_maybe_prior_trap, | |
| 343 bool& ret_maybe_prior_recompile); | |
| 344 // class loading support for uncommon trap | |
| 345 static void load_class_by_index(constantPoolHandle constant_pool, int index, TRAPS); | |
| 346 static void load_class_by_index(constantPoolHandle constant_pool, int index); | |
| 347 | |
| 348 static UnrollBlock* fetch_unroll_info_helper(JavaThread* thread); | |
| 349 | |
| 350 static DeoptAction _unloaded_action; // == Action_reinterpret; | |
| 351 static const char* _trap_reason_name[Reason_LIMIT]; | |
| 352 static const char* _trap_action_name[Action_LIMIT]; | |
| 353 | |
| 354 static juint _deoptimization_hist[Reason_LIMIT][1+Action_LIMIT][BC_CASE_LIMIT]; | |
| 355 // Note: Histogram array size is 1-2 Kb. | |
| 356 | |
| 357 public: | |
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358 static void update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason); |
| 0 | 359 }; |
| 360 | |
| 361 class DeoptimizationMarker : StackObj { // for profiling | |
| 362 static bool _is_active; | |
| 363 public: | |
| 364 DeoptimizationMarker() { _is_active = true; } | |
| 365 ~DeoptimizationMarker() { _is_active = false; } | |
| 366 static bool is_active() { return _is_active; } | |
| 367 }; | |
| 1972 | 368 |
| 369 #endif // SHARE_VM_RUNTIME_DEOPTIMIZATION_HPP |