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_SHAREDRUNTIME_HPP 26 #define SHARE_RUNTIME_SHAREDRUNTIME_HPP 27 28 #include "interpreter/bytecodeHistogram.hpp" 29 #include "interpreter/bytecodeTracer.hpp" 30 #include "interpreter/linkResolver.hpp" 31 #include "memory/allocation.hpp" 32 #include "memory/resourceArea.hpp" 33 #include "runtime/signature.hpp" 34 #include "utilities/hashtable.hpp" 35 #include "utilities/macros.hpp" 36 37 class AdapterHandlerEntry; 38 class AdapterHandlerTable; 39 class AdapterFingerPrint; 40 class vframeStream; 41 class SigEntry; 42 43 // Runtime is the base class for various runtime interfaces 44 // (InterpreterRuntime, CompilerRuntime, etc.). It provides 45 // shared functionality such as exception forwarding (C++ to 46 // Java exceptions), locking/unlocking mechanisms, statistical 47 // information, etc. 48 49 class SharedRuntime: AllStatic { 50 friend class VMStructs; 51 52 private: 53 static bool resolve_sub_helper_internal(methodHandle callee_method, const frame& caller_frame, 54 CompiledMethod* caller_nm, bool is_virtual, bool is_optimized, 55 Handle receiver, CallInfo& call_info, Bytecodes::Code invoke_code, TRAPS); 56 static methodHandle resolve_sub_helper(JavaThread *thread, 57 bool is_virtual, 58 bool is_optimized, 59 bool* caller_is_c1, TRAPS); 60 61 // Shared stub locations 62 63 static RuntimeStub* _wrong_method_blob; 64 static RuntimeStub* _wrong_method_abstract_blob; 65 static RuntimeStub* _ic_miss_blob; 66 static RuntimeStub* _resolve_opt_virtual_call_blob; 67 static RuntimeStub* _resolve_virtual_call_blob; 68 static RuntimeStub* _resolve_static_call_blob; 69 70 static DeoptimizationBlob* _deopt_blob; 71 72 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob; 73 static SafepointBlob* _polling_page_safepoint_handler_blob; 74 static SafepointBlob* _polling_page_return_handler_blob; 75 76 #ifdef COMPILER2 77 static UncommonTrapBlob* _uncommon_trap_blob; 78 #endif // COMPILER2 79 80 #ifndef PRODUCT 81 // Counters 82 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable) 83 #endif // !PRODUCT 84 85 private: 86 enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP }; 87 static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type); 88 static RuntimeStub* generate_resolve_blob(address destination, const char* name); 89 public: 90 static void generate_stubs(void); 91 92 // max bytes for each dtrace string parameter 93 enum { max_dtrace_string_size = 256 }; 94 95 // The following arithmetic routines are used on platforms that do 96 // not have machine instructions to implement their functionality. 97 // Do not remove these. 98 99 // long arithmetics 100 static jlong lmul(jlong y, jlong x); 101 static jlong ldiv(jlong y, jlong x); 102 static jlong lrem(jlong y, jlong x); 103 104 // float and double remainder 105 static jfloat frem(jfloat x, jfloat y); 106 static jdouble drem(jdouble x, jdouble y); 107 108 109 #ifdef _WIN64 110 // Workaround for fmod issue in the Windows x64 CRT 111 static double fmod_winx64(double x, double y); 112 #endif 113 114 #ifdef __SOFTFP__ 115 static jfloat fadd(jfloat x, jfloat y); 116 static jfloat fsub(jfloat x, jfloat y); 117 static jfloat fmul(jfloat x, jfloat y); 118 static jfloat fdiv(jfloat x, jfloat y); 119 120 static jdouble dadd(jdouble x, jdouble y); 121 static jdouble dsub(jdouble x, jdouble y); 122 static jdouble dmul(jdouble x, jdouble y); 123 static jdouble ddiv(jdouble x, jdouble y); 124 #endif // __SOFTFP__ 125 126 // float conversion (needs to set appropriate rounding mode) 127 static jint f2i (jfloat x); 128 static jlong f2l (jfloat x); 129 static jint d2i (jdouble x); 130 static jlong d2l (jdouble x); 131 static jfloat d2f (jdouble x); 132 static jfloat l2f (jlong x); 133 static jdouble l2d (jlong x); 134 135 #ifdef __SOFTFP__ 136 static jfloat i2f (jint x); 137 static jdouble i2d (jint x); 138 static jdouble f2d (jfloat x); 139 #endif // __SOFTFP__ 140 141 // double trigonometrics and transcendentals 142 static jdouble dsin(jdouble x); 143 static jdouble dcos(jdouble x); 144 static jdouble dtan(jdouble x); 145 static jdouble dlog(jdouble x); 146 static jdouble dlog10(jdouble x); 147 static jdouble dexp(jdouble x); 148 static jdouble dpow(jdouble x, jdouble y); 149 150 #if defined(__SOFTFP__) || defined(E500V2) 151 static double dabs(double f); 152 #endif 153 154 #if defined(__SOFTFP__) || defined(PPC) 155 static double dsqrt(double f); 156 #endif 157 158 // Montgomery multiplication 159 static void montgomery_multiply(jint *a_ints, jint *b_ints, jint *n_ints, 160 jint len, jlong inv, jint *m_ints); 161 static void montgomery_square(jint *a_ints, jint *n_ints, 162 jint len, jlong inv, jint *m_ints); 163 164 #ifdef __SOFTFP__ 165 // C++ compiler generates soft float instructions as well as passing 166 // float and double in registers. 167 static int fcmpl(float x, float y); 168 static int fcmpg(float x, float y); 169 static int dcmpl(double x, double y); 170 static int dcmpg(double x, double y); 171 172 static int unordered_fcmplt(float x, float y); 173 static int unordered_dcmplt(double x, double y); 174 static int unordered_fcmple(float x, float y); 175 static int unordered_dcmple(double x, double y); 176 static int unordered_fcmpge(float x, float y); 177 static int unordered_dcmpge(double x, double y); 178 static int unordered_fcmpgt(float x, float y); 179 static int unordered_dcmpgt(double x, double y); 180 181 static float fneg(float f); 182 static double dneg(double f); 183 #endif 184 185 // exception handling across interpreter/compiler boundaries 186 static address raw_exception_handler_for_return_address(JavaThread* thread, address return_address); 187 static address exception_handler_for_return_address(JavaThread* thread, address return_address); 188 189 // exception handling and implicit exceptions 190 static address compute_compiled_exc_handler(CompiledMethod* nm, address ret_pc, Handle& exception, 191 bool force_unwind, bool top_frame_only, bool& recursive_exception_occurred); 192 enum ImplicitExceptionKind { 193 IMPLICIT_NULL, 194 IMPLICIT_DIVIDE_BY_ZERO, 195 STACK_OVERFLOW 196 }; 197 static void throw_AbstractMethodError(JavaThread* thread); 198 static void throw_IncompatibleClassChangeError(JavaThread* thread); 199 static void throw_ArithmeticException(JavaThread* thread); 200 static void throw_NullPointerException(JavaThread* thread); 201 static void throw_NullPointerException_at_call(JavaThread* thread); 202 static void throw_StackOverflowError(JavaThread* thread); 203 static void throw_delayed_StackOverflowError(JavaThread* thread); 204 static void throw_StackOverflowError_common(JavaThread* thread, bool delayed); 205 static address continuation_for_implicit_exception(JavaThread* thread, 206 address faulting_pc, 207 ImplicitExceptionKind exception_kind); 208 #if INCLUDE_JVMCI 209 static address deoptimize_for_implicit_exception(JavaThread* thread, address pc, CompiledMethod* nm, int deopt_reason); 210 #endif 211 212 // Post-slow-path-allocation, pre-initializing-stores step for 213 // implementing e.g. ReduceInitialCardMarks 214 static void on_slowpath_allocation_exit(JavaThread* thread); 215 216 static void enable_stack_reserved_zone(JavaThread* thread); 217 static frame look_for_reserved_stack_annotated_method(JavaThread* thread, frame fr); 218 219 // Shared stub locations 220 static address get_poll_stub(address pc); 221 222 static address get_ic_miss_stub() { 223 assert(_ic_miss_blob!= NULL, "oops"); 224 return _ic_miss_blob->entry_point(); 225 } 226 227 static address get_handle_wrong_method_stub() { 228 assert(_wrong_method_blob!= NULL, "oops"); 229 return _wrong_method_blob->entry_point(); 230 } 231 232 static address get_handle_wrong_method_abstract_stub() { 233 assert(_wrong_method_abstract_blob!= NULL, "oops"); 234 return _wrong_method_abstract_blob->entry_point(); 235 } 236 237 #ifdef COMPILER2 238 static void generate_uncommon_trap_blob(void); 239 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; } 240 #endif // COMPILER2 241 242 static address get_resolve_opt_virtual_call_stub() { 243 assert(_resolve_opt_virtual_call_blob != NULL, "oops"); 244 return _resolve_opt_virtual_call_blob->entry_point(); 245 } 246 static address get_resolve_virtual_call_stub() { 247 assert(_resolve_virtual_call_blob != NULL, "oops"); 248 return _resolve_virtual_call_blob->entry_point(); 249 } 250 static address get_resolve_static_call_stub() { 251 assert(_resolve_static_call_blob != NULL, "oops"); 252 return _resolve_static_call_blob->entry_point(); 253 } 254 255 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; } 256 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; } 257 static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; } 258 259 // Counters 260 #ifndef PRODUCT 261 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; } 262 #endif // PRODUCT 263 264 // Helper routine for full-speed JVMTI exception throwing support 265 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception); 266 static void throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message = NULL); 267 268 // RedefineClasses() tracing support for obsolete method entry 269 static int rc_trace_method_entry(JavaThread* thread, Method* m); 270 271 // To be used as the entry point for unresolved native methods. 272 static address native_method_throw_unsatisfied_link_error_entry(); 273 static address native_method_throw_unsupported_operation_exception_entry(); 274 275 static oop retrieve_receiver(Symbol* sig, frame caller); 276 277 static void register_finalizer(JavaThread* thread, oopDesc* obj); 278 279 // dtrace notifications 280 static int dtrace_object_alloc(oopDesc* o, int size); 281 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o, int size); 282 static int dtrace_method_entry(JavaThread* thread, Method* m); 283 static int dtrace_method_exit(JavaThread* thread, Method* m); 284 285 // Utility method for retrieving the Java thread id, returns 0 if the 286 // thread is not a well formed Java thread. 287 static jlong get_java_tid(Thread* thread); 288 289 290 // used by native wrappers to reenable yellow if overflow happened in native code 291 static void reguard_yellow_pages(); 292 293 // Fill in the "X cannot be cast to a Y" message for ClassCastException 294 // 295 // @param thr the current thread 296 // @param caster_klass the class of the object we are casting 297 // @return the dynamically allocated exception message (must be freed 298 // by the caller using a resource mark) 299 // 300 // BCP must refer to the current 'checkcast' opcode for the frame 301 // on top of the stack. 302 // The caller (or one of its callers) must use a ResourceMark 303 // in order to correctly free the result. 304 // 305 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass); 306 307 // Fill in the "X cannot be cast to a Y" message for ClassCastException 308 // 309 // @param caster_klass the class of the object we are casting 310 // @param target_klass the target klass attempt 311 // @return the dynamically allocated exception message (must be freed 312 // by the caller using a resource mark) 313 // 314 // This version does not require access the frame, so it can be called 315 // from interpreted code 316 // The caller (or one of it's callers) must use a ResourceMark 317 // in order to correctly free the result. 318 // 319 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = NULL); 320 321 // Resolves a call site- may patch in the destination of the call into the 322 // compiled code. 323 static methodHandle resolve_helper(JavaThread *thread, 324 bool is_virtual, 325 bool is_optimized, 326 bool* caller_is_c1, TRAPS); 327 328 private: 329 // deopt blob 330 static void generate_deopt_blob(void); 331 332 static bool handle_ic_miss_helper_internal(Handle receiver, CompiledMethod* caller_nm, const frame& caller_frame, 333 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info, 334 bool& needs_ic_stub_refill, bool& is_optimized, bool caller_is_c1, TRAPS); 335 336 public: 337 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; } 338 339 // Resets a call-site in compiled code so it will get resolved again. 340 static methodHandle reresolve_call_site(JavaThread *thread, bool& is_optimized, bool& caller_is_c1, TRAPS); 341 342 // In the code prolog, if the klass comparison fails, the inline cache 343 // misses and the call site is patched to megamorphic 344 static methodHandle handle_ic_miss_helper(JavaThread* thread, bool& is_optimized, bool& caller_is_c1, TRAPS); 345 346 // Find the method that called us. 347 static methodHandle find_callee_method(JavaThread* thread, TRAPS); 348 349 350 static address entry_for_handle_wrong_method(methodHandle callee_method, bool is_optimized, bool caller_is_c1) { 351 assert(callee_method->verified_code_entry() != NULL, "Jump to zero!"); 352 assert(callee_method->verified_value_code_entry() != NULL, "Jump to zero!"); 353 assert(callee_method->verified_value_ro_code_entry() != NULL, "Jump to zero!"); 354 if (caller_is_c1) { 355 return callee_method->verified_value_code_entry(); 356 } else if (is_optimized) { 357 return callee_method->verified_code_entry(); 358 } else { 359 return callee_method->verified_value_ro_code_entry(); 360 } 361 } 362 363 private: 364 static Handle find_callee_info(JavaThread* thread, 365 Bytecodes::Code& bc, 366 CallInfo& callinfo, TRAPS); 367 static Handle find_callee_info_helper(JavaThread* thread, 368 vframeStream& vfst, 369 Bytecodes::Code& bc, 370 CallInfo& callinfo, TRAPS); 371 372 static methodHandle extract_attached_method(vframeStream& vfst); 373 374 #if defined(X86) && defined(COMPILER1) 375 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available. 376 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result); 377 #endif // X86 && COMPILER1 378 379 public: 380 381 // Read the array of BasicTypes from a Java signature, and compute where 382 // compiled Java code would like to put the results. Values in reg_lo and 383 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are 384 // registers, those above refer to 4-byte stack slots. All stack slots are 385 // based off of the window top. SharedInfo::stack0 refers to the first usable 386 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word 387 // 4-bytes higher. So for sparc because the register window save area is at 388 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0 389 // will be just above it. ( 390 // return value is the maximum number of VMReg stack slots the convention will use. 391 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed, int is_outgoing); 392 static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) { 393 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length()); 394 int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt); 395 return java_calling_convention(sig_bt, regs, total_args_passed, false); 396 } 397 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed); 398 static const uint java_return_convention_max_int; 399 static const uint java_return_convention_max_float; 400 401 static void check_member_name_argument_is_last_argument(const methodHandle& method, 402 const BasicType* sig_bt, 403 const VMRegPair* regs) NOT_DEBUG_RETURN; 404 405 // Ditto except for calling C 406 // 407 // C argument in register AND stack slot. 408 // Some architectures require that an argument must be passed in a register 409 // AND in a stack slot. These architectures provide a second VMRegPair array 410 // to be filled by the c_calling_convention method. On other architectures, 411 // NULL is being passed as the second VMRegPair array, so arguments are either 412 // passed in a register OR in a stack slot. 413 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2, 414 int total_args_passed); 415 416 static size_t trampoline_size(); 417 418 static void generate_trampoline(MacroAssembler *masm, address destination); 419 420 // Generate I2C and C2I adapters. These adapters are simple argument marshalling 421 // blobs. Unlike adapters in the tiger and earlier releases the code in these 422 // blobs does not create a new frame and are therefore virtually invisible 423 // to the stack walking code. In general these blobs extend the callers stack 424 // as needed for the conversion of argument locations. 425 426 // When calling a c2i blob the code will always call the interpreter even if 427 // by the time we reach the blob there is compiled code available. This allows 428 // the blob to pass the incoming stack pointer (the sender sp) in a known 429 // location for the interpreter to record. This is used by the frame code 430 // to correct the sender code to match up with the stack pointer when the 431 // thread left the compiled code. In addition it allows the interpreter 432 // to remove the space the c2i adapter allocated to do its argument conversion. 433 434 // Although a c2i blob will always run interpreted even if compiled code is 435 // present if we see that compiled code is present the compiled call site 436 // will be patched/re-resolved so that later calls will run compiled. 437 438 // Additionally a c2i blob need to have a unverified entry because it can be reached 439 // in situations where the call site is an inlined cache site and may go megamorphic. 440 441 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed 442 // that the interpreter before it does any call dispatch will record the current 443 // stack pointer in the interpreter frame. On return it will restore the stack 444 // pointer as needed. This means the i2c adapter code doesn't need any special 445 // handshaking path with compiled code to keep the stack walking correct. 446 447 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm, 448 int comp_args_on_stack, 449 const GrowableArray<SigEntry>* sig, 450 const VMRegPair* regs, 451 const GrowableArray<SigEntry>* sig_cc, 452 const VMRegPair* regs_cc, 453 const GrowableArray<SigEntry>* sig_cc_ro, 454 const VMRegPair* regs_cc_ro, 455 AdapterFingerPrint* fingerprint, 456 AdapterBlob*& new_adapter); 457 458 static void gen_i2c_adapter(MacroAssembler *_masm, 459 int comp_args_on_stack, 460 const GrowableArray<SigEntry>* sig, 461 const VMRegPair *regs); 462 463 // OSR support 464 465 // OSR_migration_begin will extract the jvm state from an interpreter 466 // frame (locals, monitors) and store the data in a piece of C heap 467 // storage. This then allows the interpreter frame to be removed from the 468 // stack and the OSR nmethod to be called. That method is called with a 469 // pointer to the C heap storage. This pointer is the return value from 470 // OSR_migration_begin. 471 472 static intptr_t* OSR_migration_begin(JavaThread *thread); 473 474 // OSR_migration_end is a trivial routine. It is called after the compiled 475 // method has extracted the jvm state from the C heap that OSR_migration_begin 476 // created. It's entire job is to simply free this storage. 477 static void OSR_migration_end(intptr_t* buf); 478 479 // Convert a sig into a calling convention register layout 480 // and find interesting things about it. 481 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size); 482 static VMReg name_for_receiver(); 483 484 // "Top of Stack" slots that may be unused by the calling convention but must 485 // otherwise be preserved. 486 // On Intel these are not necessary and the value can be zero. 487 // On Sparc this describes the words reserved for storing a register window 488 // when an interrupt occurs. 489 static uint out_preserve_stack_slots(); 490 491 // Is vector's size (in bytes) bigger than a size saved by default? 492 // For example, on x86 16 bytes XMM registers are saved by default. 493 static bool is_wide_vector(int size); 494 495 // Save and restore a native result 496 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots); 497 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots); 498 499 // Generate a native wrapper for a given method. The method takes arguments 500 // in the Java compiled code convention, marshals them to the native 501 // convention (handlizes oops, etc), transitions to native, makes the call, 502 // returns to java state (possibly blocking), unhandlizes any result and 503 // returns. 504 // 505 // The wrapper may contain special-case code if the given method 506 // is a JNI critical method, or a compiled method handle adapter, 507 // such as _invokeBasic, _linkToVirtual, etc. 508 static nmethod* generate_native_wrapper(MacroAssembler* masm, 509 const methodHandle& method, 510 int compile_id, 511 BasicType* sig_bt, 512 VMRegPair* regs, 513 BasicType ret_type); 514 515 // Block before entering a JNI critical method 516 static void block_for_jni_critical(JavaThread* thread); 517 518 // Pin/Unpin object 519 static oopDesc* pin_object(JavaThread* thread, oopDesc* obj); 520 static void unpin_object(JavaThread* thread, oopDesc* obj); 521 522 // A compiled caller has just called the interpreter, but compiled code 523 // exists. Patch the caller so he no longer calls into the interpreter. 524 static void fixup_callers_callsite(Method* moop, address ret_pc); 525 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb); 526 527 // Slow-path Locking and Unlocking 528 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread); 529 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread); 530 531 // Resolving of calls 532 static address resolve_static_call_C (JavaThread *thread); 533 static address resolve_virtual_call_C (JavaThread *thread); 534 static address resolve_opt_virtual_call_C(JavaThread *thread); 535 536 static void load_value_type_fields_in_regs(JavaThread *thread, oopDesc* res); 537 static void store_value_type_fields_to_buf(JavaThread *thread, intptr_t res); 538 539 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.) 540 static void slow_arraycopy_C(oopDesc* src, jint src_pos, 541 oopDesc* dest, jint dest_pos, 542 jint length, JavaThread* thread); 543 544 // handle ic miss with caller being compiled code 545 // wrong method handling (inline cache misses, zombie methods) 546 static address handle_wrong_method(JavaThread* thread); 547 static address handle_wrong_method_abstract(JavaThread* thread); 548 static address handle_wrong_method_ic_miss(JavaThread* thread); 549 static void allocate_value_types(JavaThread* thread, Method* callee, bool allocate_receiver); 550 static oop allocate_value_types_impl(JavaThread* thread, methodHandle callee, bool allocate_receiver, TRAPS); 551 static void apply_post_barriers(JavaThread* thread, objArrayOopDesc* array); 552 553 static address handle_unsafe_access(JavaThread* thread, address next_pc); 554 555 static BufferedValueTypeBlob* generate_buffered_value_type_adapter(const ValueKlass* vk); 556 #ifndef PRODUCT 557 558 // Collect and print inline cache miss statistics 559 private: 560 enum { maxICmiss_count = 100 }; 561 static int _ICmiss_index; // length of IC miss histogram 562 static int _ICmiss_count[maxICmiss_count]; // miss counts 563 static address _ICmiss_at[maxICmiss_count]; // miss addresses 564 static void trace_ic_miss(address at); 565 566 public: 567 static int _throw_null_ctr; // throwing a null-pointer exception 568 static int _ic_miss_ctr; // total # of IC misses 569 static int _wrong_method_ctr; 570 static int _resolve_static_ctr; 571 static int _resolve_virtual_ctr; 572 static int _resolve_opt_virtual_ctr; 573 static int _implicit_null_throws; 574 static int _implicit_div0_throws; 575 576 static int _jbyte_array_copy_ctr; // Slow-path byte array copy 577 static int _jshort_array_copy_ctr; // Slow-path short array copy 578 static int _jint_array_copy_ctr; // Slow-path int array copy 579 static int _jlong_array_copy_ctr; // Slow-path long array copy 580 static int _oop_array_copy_ctr; // Slow-path oop array copy 581 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast 582 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks 583 static int _generic_array_copy_ctr; // Slow-path includes type decoding 584 static int _slow_array_copy_ctr; // Slow-path failed out to a method call 585 586 static int _new_instance_ctr; // 'new' object requires GC 587 static int _new_array_ctr; // 'new' array requires GC 588 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr; 589 static int _find_handler_ctr; // find exception handler 590 static int _rethrow_ctr; // rethrow exception 591 static int _mon_enter_stub_ctr; // monitor enter stub 592 static int _mon_exit_stub_ctr; // monitor exit stub 593 static int _mon_enter_ctr; // monitor enter slow 594 static int _mon_exit_ctr; // monitor exit slow 595 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check 596 597 // Statistics code 598 // stats for "normal" compiled calls (non-interface) 599 static int _nof_normal_calls; // total # of calls 600 static int _nof_optimized_calls; // total # of statically-bound calls 601 static int _nof_inlined_calls; // total # of inlined normal calls 602 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial) 603 static int _nof_inlined_static_calls; // total # of inlined static calls 604 // stats for compiled interface calls 605 static int _nof_interface_calls; // total # of compiled calls 606 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls 607 static int _nof_inlined_interface_calls; // total # of inlined interface calls 608 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls 609 // stats for runtime exceptions 610 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining 611 612 public: // for compiler 613 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; } 614 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; } 615 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; } 616 static address nof_static_calls_addr() { return (address)&_nof_static_calls; } 617 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; } 618 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; } 619 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; } 620 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; } 621 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; } 622 static void print_call_statistics(int comp_total); 623 static void print_statistics(); 624 static void print_ic_miss_histogram(); 625 626 #endif // PRODUCT 627 }; 628 629 630 // --------------------------------------------------------------------------- 631 // Implementation of AdapterHandlerLibrary 632 // 633 // This library manages argument marshaling adapters and native wrappers. 634 // There are 2 flavors of adapters: I2C and C2I. 635 // 636 // The I2C flavor takes a stock interpreted call setup, marshals the 637 // arguments for a Java-compiled call, and jumps to Rmethod-> code()-> 638 // code_begin(). It is broken to call it without an nmethod assigned. 639 // The usual behavior is to lift any register arguments up out of the 640 // stack and possibly re-pack the extra arguments to be contiguous. 641 // I2C adapters will save what the interpreter's stack pointer will be 642 // after arguments are popped, then adjust the interpreter's frame 643 // size to force alignment and possibly to repack the arguments. 644 // After re-packing, it jumps to the compiled code start. There are 645 // no safepoints in this adapter code and a GC cannot happen while 646 // marshaling is in progress. 647 // 648 // The C2I flavor takes a stock compiled call setup plus the target method in 649 // Rmethod, marshals the arguments for an interpreted call and jumps to 650 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been 651 // setup. Compiled frames are fixed-size and the args are likely not in the 652 // right place. Hence all the args will likely be copied into the 653 // interpreter's frame, forcing that frame to grow. The compiled frame's 654 // outgoing stack args will be dead after the copy. 655 // 656 // Native wrappers, like adapters, marshal arguments. Unlike adapters they 657 // also perform an official frame push & pop. They have a call to the native 658 // routine in their middles and end in a return (instead of ending in a jump). 659 // The native wrappers are stored in real nmethods instead of the BufferBlobs 660 // used by the adapters. The code generation happens here because it's very 661 // similar to what the adapters have to do. 662 663 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> { 664 friend class AdapterHandlerTable; 665 666 private: 667 AdapterFingerPrint* _fingerprint; 668 address _i2c_entry; 669 address _c2i_entry; 670 address _c2i_value_entry; 671 address _c2i_value_ro_entry; 672 address _c2i_unverified_entry; 673 address _c2i_unverified_value_entry; 674 675 // Support for scalarized value type calling convention 676 const GrowableArray<SigEntry>* _sig_cc; 677 678 #ifdef ASSERT 679 // Captures code and signature used to generate this adapter when 680 // verifying adapter equivalence. 681 unsigned char* _saved_code; 682 int _saved_code_length; 683 #endif 684 685 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_value_entry, 686 address c2i_value_ro_entry, address c2i_unverified_entry, address c2i_unverified_value_entry) { 687 _fingerprint = fingerprint; 688 _i2c_entry = i2c_entry; 689 _c2i_entry = c2i_entry; 690 _c2i_value_entry = c2i_value_entry; 691 _c2i_value_ro_entry = c2i_value_ro_entry; 692 _c2i_unverified_entry = c2i_unverified_entry; 693 _c2i_unverified_value_entry = c2i_unverified_value_entry; 694 _sig_cc = NULL; 695 #ifdef ASSERT 696 _saved_code = NULL; 697 _saved_code_length = 0; 698 #endif 699 } 700 701 void deallocate(); 702 703 // should never be used 704 AdapterHandlerEntry(); 705 706 public: 707 address get_i2c_entry() const { return _i2c_entry; } 708 address get_c2i_entry() const { return _c2i_entry; } 709 address get_c2i_value_entry() const { return _c2i_value_entry; } 710 address get_c2i_value_ro_entry() const { return _c2i_value_ro_entry; } 711 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; } 712 address get_c2i_unverified_value_entry() const { return _c2i_unverified_value_entry; } 713 address base_address(); 714 void relocate(address new_base); 715 716 // Support for scalarized value type calling convention 717 void set_sig_cc(const GrowableArray<SigEntry>* sig) { _sig_cc = sig; } 718 const GrowableArray<SigEntry>* get_sig_cc() const { return _sig_cc; } 719 720 AdapterFingerPrint* fingerprint() const { return _fingerprint; } 721 722 AdapterHandlerEntry* next() { 723 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next(); 724 } 725 726 #ifdef ASSERT 727 // Used to verify that code generated for shared adapters is equivalent 728 void save_code (unsigned char* code, int length); 729 bool compare_code(unsigned char* code, int length); 730 #endif 731 732 //virtual void print_on(outputStream* st) const; DO NOT USE 733 void print_adapter_on(outputStream* st) const; 734 }; 735 736 // This class is used only with DumpSharedSpaces==true. It holds extra information 737 // that's used only during CDS dump time. 738 // For details, see comments around Method::link_method() 739 class CDSAdapterHandlerEntry: public AdapterHandlerEntry { 740 address _c2i_entry_trampoline; // allocated from shared spaces "MC" region 741 AdapterHandlerEntry** _adapter_trampoline; // allocated from shared spaces "MD" region 742 743 public: 744 address get_c2i_entry_trampoline() const { return _c2i_entry_trampoline; } 745 AdapterHandlerEntry** get_adapter_trampoline() const { return _adapter_trampoline; } 746 void init() NOT_CDS_RETURN; 747 }; 748 749 750 class AdapterHandlerLibrary: public AllStatic { 751 private: 752 static BufferBlob* _buffer; // the temporary code buffer in CodeCache 753 static AdapterHandlerTable* _adapters; 754 static AdapterHandlerEntry* _abstract_method_handler; 755 static BufferBlob* buffer_blob(); 756 static void initialize(); 757 static AdapterHandlerEntry* get_adapter0(const methodHandle& method); 758 759 public: 760 761 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, 762 address i2c_entry, address c2i_entry, address c2i_value_entry, address c2i_value_ro_entry, 763 address c2i_unverified_entry, address c2i_unverified_value_entry); 764 static void create_native_wrapper(const methodHandle& method); 765 static AdapterHandlerEntry* get_adapter(const methodHandle& method); 766 767 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); } 768 static void print_handler_on(outputStream* st, const CodeBlob* b); 769 static bool contains(const CodeBlob* b); 770 #ifndef PRODUCT 771 static void print_statistics(); 772 #endif // PRODUCT 773 774 }; 775 776 // Utility class for computing the calling convention of the 3 types 777 // of compiled method entries: 778 // Method::_from_compiled_entry - sig_cc 779 // Method::_from_compiled_value_ro_entry - sig_cc_ro 780 // Method::_from_compiled_value_entry - sig 781 class CompiledEntrySignature : public StackObj { 782 Method* _method; 783 int _num_value_args; 784 bool _has_value_recv; 785 GrowableArray<SigEntry> *_sig; 786 GrowableArray<SigEntry> *_sig_cc; 787 GrowableArray<SigEntry> *_sig_cc_ro; 788 VMRegPair* _regs; 789 VMRegPair* _regs_cc; 790 VMRegPair* _regs_cc_ro; 791 792 int _args_on_stack; 793 int _args_on_stack_cc; 794 int _args_on_stack_cc_ro; 795 796 bool _c1_needs_stack_repair; 797 bool _c2_needs_stack_repair; 798 bool _has_scalarized_args; 799 800 public: 801 Method* method() const { return _method; } 802 803 // Used by Method::_from_compiled_value_entry 804 GrowableArray<SigEntry>& sig() const { return *_sig; } 805 806 // Used by Method::_from_compiled_entry 807 GrowableArray<SigEntry>& sig_cc() const { return *_sig_cc; } 808 809 // Used by Method::_from_compiled_value_ro_entry 810 GrowableArray<SigEntry>& sig_cc_ro() const { return *_sig_cc_ro; } 811 812 VMRegPair* regs() const { return _regs; } 813 VMRegPair* regs_cc() const { return _regs_cc; } 814 VMRegPair* regs_cc_ro() const { return _regs_cc_ro; } 815 816 int args_on_stack() const { return _args_on_stack; } 817 int args_on_stack_cc() const { return _args_on_stack_cc; } 818 int args_on_stack_cc_ro() const { return _args_on_stack_cc_ro; } 819 820 int num_value_args() const { return _num_value_args; } 821 bool has_value_arg() const { return _num_value_args > 0; } 822 bool has_value_recv() const { return _has_value_recv; } 823 824 bool has_scalarized_args() const { return _has_scalarized_args; } 825 bool c1_needs_stack_repair() const { return _c1_needs_stack_repair; } 826 bool c2_needs_stack_repair() const { return _c2_needs_stack_repair; } 827 828 CompiledEntrySignature(Method* method); 829 void compute_calling_conventions(); 830 831 private: 832 static int compute_scalarized_cc(Method* method, GrowableArray<SigEntry>*& sig_cc, VMRegPair*& regs_cc, bool scalar_receiver); 833 static int insert_reserved_entry(GrowableArray<SigEntry>* sig_cc, VMRegPair* regs_cc, int ret_off); 834 }; 835 836 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP