1 /* 2 * Copyright (c) 1997, 2024, 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 "asm/codeBuffer.hpp" 29 #include "code/codeBlob.hpp" 30 #include "code/vmreg.hpp" 31 #include "interpreter/linkResolver.hpp" 32 #include "memory/allStatic.hpp" 33 #include "memory/resourceArea.hpp" 34 #include "runtime/signature.hpp" 35 #include "utilities/macros.hpp" 36 37 class AdapterHandlerEntry; 38 class AdapterFingerPrint; 39 class vframeStream; 40 class SigEntry; 41 42 // Runtime is the base class for various runtime interfaces 43 // (InterpreterRuntime, CompilerRuntime, etc.). It provides 44 // shared functionality such as exception forwarding (C++ to 45 // Java exceptions), locking/unlocking mechanisms, statistical 46 // information, etc. 47 48 class SharedRuntime: AllStatic { 49 friend class VMStructs; 50 51 private: 52 // Shared stub locations 53 54 static RuntimeStub* _wrong_method_blob; 55 static RuntimeStub* _wrong_method_abstract_blob; 56 static RuntimeStub* _ic_miss_blob; 57 static RuntimeStub* _resolve_opt_virtual_call_blob; 58 static RuntimeStub* _resolve_virtual_call_blob; 59 static RuntimeStub* _resolve_static_call_blob; 60 61 static DeoptimizationBlob* _deopt_blob; 62 63 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob; 64 static SafepointBlob* _polling_page_safepoint_handler_blob; 65 static SafepointBlob* _polling_page_return_handler_blob; 66 67 #ifdef COMPILER2 68 static UncommonTrapBlob* _uncommon_trap_blob; 69 #endif // COMPILER2 70 71 static nmethod* _cont_doYield_stub; 72 73 #ifndef PRODUCT 74 // Counters 75 static int64_t _nof_megamorphic_calls; // total # of megamorphic calls (through vtable) 76 #endif // !PRODUCT 77 78 private: 79 enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP }; 80 static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type); 81 static RuntimeStub* generate_resolve_blob(address destination, const char* name); 82 public: 83 static void generate_stubs(void); 84 85 // max bytes for each dtrace string parameter 86 enum { max_dtrace_string_size = 256 }; 87 88 // The following arithmetic routines are used on platforms that do 89 // not have machine instructions to implement their functionality. 90 // Do not remove these. 91 92 // long arithmetics 93 static jlong lmul(jlong y, jlong x); 94 static jlong ldiv(jlong y, jlong x); 95 static jlong lrem(jlong y, jlong x); 96 97 // float and double remainder 98 static jfloat frem(jfloat x, jfloat y); 99 static jdouble drem(jdouble x, jdouble y); 100 101 102 #ifdef _WIN64 103 // Workaround for fmod issue in the Windows x64 CRT 104 static double fmod_winx64(double x, double y); 105 #endif 106 107 #ifdef __SOFTFP__ 108 static jfloat fadd(jfloat x, jfloat y); 109 static jfloat fsub(jfloat x, jfloat y); 110 static jfloat fmul(jfloat x, jfloat y); 111 static jfloat fdiv(jfloat x, jfloat y); 112 113 static jdouble dadd(jdouble x, jdouble y); 114 static jdouble dsub(jdouble x, jdouble y); 115 static jdouble dmul(jdouble x, jdouble y); 116 static jdouble ddiv(jdouble x, jdouble y); 117 #endif // __SOFTFP__ 118 119 // float conversion (needs to set appropriate rounding mode) 120 static jint f2i (jfloat x); 121 static jlong f2l (jfloat x); 122 static jint d2i (jdouble x); 123 static jlong d2l (jdouble x); 124 static jfloat d2f (jdouble x); 125 static jfloat l2f (jlong x); 126 static jdouble l2d (jlong x); 127 static jfloat i2f (jint x); 128 129 #ifdef __SOFTFP__ 130 static jdouble i2d (jint x); 131 static jdouble f2d (jfloat x); 132 #endif // __SOFTFP__ 133 134 // double trigonometrics and transcendentals 135 static jdouble dsin(jdouble x); 136 static jdouble dcos(jdouble x); 137 static jdouble dtan(jdouble x); 138 static jdouble dlog(jdouble x); 139 static jdouble dlog10(jdouble x); 140 static jdouble dexp(jdouble x); 141 static jdouble dpow(jdouble x, jdouble y); 142 143 #if defined(__SOFTFP__) || defined(E500V2) 144 static double dabs(double f); 145 #endif 146 147 #if defined(__SOFTFP__) || defined(PPC) 148 static double dsqrt(double f); 149 #endif 150 151 // Montgomery multiplication 152 static void montgomery_multiply(jint *a_ints, jint *b_ints, jint *n_ints, 153 jint len, jlong inv, jint *m_ints); 154 static void montgomery_square(jint *a_ints, jint *n_ints, 155 jint len, jlong inv, jint *m_ints); 156 157 #ifdef __SOFTFP__ 158 // C++ compiler generates soft float instructions as well as passing 159 // float and double in registers. 160 static int fcmpl(float x, float y); 161 static int fcmpg(float x, float y); 162 static int dcmpl(double x, double y); 163 static int dcmpg(double x, double y); 164 165 static int unordered_fcmplt(float x, float y); 166 static int unordered_dcmplt(double x, double y); 167 static int unordered_fcmple(float x, float y); 168 static int unordered_dcmple(double x, double y); 169 static int unordered_fcmpge(float x, float y); 170 static int unordered_dcmpge(double x, double y); 171 static int unordered_fcmpgt(float x, float y); 172 static int unordered_dcmpgt(double x, double y); 173 174 static float fneg(float f); 175 static double dneg(double f); 176 #endif 177 178 // exception handling across interpreter/compiler boundaries 179 static address raw_exception_handler_for_return_address(JavaThread* current, address return_address); 180 static address exception_handler_for_return_address(JavaThread* current, address return_address); 181 182 // exception handling and implicit exceptions 183 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, 184 bool force_unwind, bool top_frame_only, bool& recursive_exception_occurred); 185 enum ImplicitExceptionKind { 186 IMPLICIT_NULL, 187 IMPLICIT_DIVIDE_BY_ZERO, 188 STACK_OVERFLOW 189 }; 190 static void throw_AbstractMethodError(JavaThread* current); 191 static void throw_IncompatibleClassChangeError(JavaThread* current); 192 static void throw_ArithmeticException(JavaThread* current); 193 static void throw_NullPointerException(JavaThread* current); 194 static void throw_NullPointerException_at_call(JavaThread* current); 195 static void throw_StackOverflowError(JavaThread* current); 196 static void throw_delayed_StackOverflowError(JavaThread* current); 197 static void throw_StackOverflowError_common(JavaThread* current, bool delayed); 198 static address continuation_for_implicit_exception(JavaThread* current, 199 address faulting_pc, 200 ImplicitExceptionKind exception_kind); 201 202 // Post-slow-path-allocation, pre-initializing-stores step for 203 // implementing e.g. ReduceInitialCardMarks 204 static void on_slowpath_allocation_exit(JavaThread* current); 205 206 static void enable_stack_reserved_zone(JavaThread* current); 207 static frame look_for_reserved_stack_annotated_method(JavaThread* current, frame fr); 208 209 // Shared stub locations 210 static address get_poll_stub(address pc); 211 212 static address get_ic_miss_stub() { 213 assert(_ic_miss_blob!= nullptr, "oops"); 214 return _ic_miss_blob->entry_point(); 215 } 216 217 static address get_handle_wrong_method_stub() { 218 assert(_wrong_method_blob!= nullptr, "oops"); 219 return _wrong_method_blob->entry_point(); 220 } 221 222 static address get_handle_wrong_method_abstract_stub() { 223 assert(_wrong_method_abstract_blob!= nullptr, "oops"); 224 return _wrong_method_abstract_blob->entry_point(); 225 } 226 227 #ifdef COMPILER2 228 static void generate_uncommon_trap_blob(void); 229 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; } 230 #endif // COMPILER2 231 232 static address get_resolve_opt_virtual_call_stub() { 233 assert(_resolve_opt_virtual_call_blob != nullptr, "oops"); 234 return _resolve_opt_virtual_call_blob->entry_point(); 235 } 236 static address get_resolve_virtual_call_stub() { 237 assert(_resolve_virtual_call_blob != nullptr, "oops"); 238 return _resolve_virtual_call_blob->entry_point(); 239 } 240 static address get_resolve_static_call_stub() { 241 assert(_resolve_static_call_blob != nullptr, "oops"); 242 return _resolve_static_call_blob->entry_point(); 243 } 244 245 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; } 246 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; } 247 static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; } 248 249 static nmethod* cont_doYield_stub() { 250 assert(_cont_doYield_stub != nullptr, "oops"); 251 return _cont_doYield_stub; 252 } 253 254 // Counters 255 #ifndef PRODUCT 256 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; } 257 #endif // PRODUCT 258 259 // Helper routine for full-speed JVMTI exception throwing support 260 static void throw_and_post_jvmti_exception(JavaThread* current, Handle h_exception); 261 static void throw_and_post_jvmti_exception(JavaThread* current, Symbol* name, const char *message = nullptr); 262 263 #if INCLUDE_JVMTI 264 // Functions for JVMTI notifications 265 static void notify_jvmti_vthread_start(oopDesc* vt, jboolean hide, JavaThread* current); 266 static void notify_jvmti_vthread_end(oopDesc* vt, jboolean hide, JavaThread* current); 267 static void notify_jvmti_vthread_mount(oopDesc* vt, jboolean hide, JavaThread* current); 268 static void notify_jvmti_vthread_unmount(oopDesc* vt, jboolean hide, JavaThread* current); 269 #endif 270 271 // RedefineClasses() tracing support for obsolete method entry 272 static int rc_trace_method_entry(JavaThread* thread, Method* m); 273 274 // To be used as the entry point for unresolved native methods. 275 static address native_method_throw_unsatisfied_link_error_entry(); 276 277 static void register_finalizer(JavaThread* thread, oopDesc* obj); 278 279 // dtrace notifications 280 static int dtrace_object_alloc(oopDesc* o); 281 static int dtrace_object_alloc(JavaThread* thread, oopDesc* o); 282 static int dtrace_object_alloc(JavaThread* thread, oopDesc* o, size_t size); 283 static int dtrace_method_entry(JavaThread* thread, Method* m); 284 static int dtrace_method_exit(JavaThread* thread, Method* m); 285 286 // Utility method for retrieving the Java thread id, returns 0 if the 287 // thread is not a well formed Java thread. 288 static jlong get_java_tid(JavaThread* thread); 289 290 291 // used by native wrappers to re-enable yellow if overflow happened in native code 292 static void reguard_yellow_pages(); 293 294 // Fill in the "X cannot be cast to a Y" message for ClassCastException 295 // 296 // @param thr the current thread 297 // @param caster_klass the class of the object we are casting 298 // @return the dynamically allocated exception message (must be freed 299 // by the caller using a resource mark) 300 // 301 // BCP must refer to the current 'checkcast' opcode for the frame 302 // on top of the stack. 303 // The caller (or one of its callers) must use a ResourceMark 304 // in order to correctly free the result. 305 // 306 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass); 307 308 // Fill in the "X cannot be cast to a Y" message for ClassCastException 309 // 310 // @param caster_klass the class of the object we are casting 311 // @param target_klass the target klass attempt 312 // @return the dynamically allocated exception message (must be freed 313 // by the caller using a resource mark) 314 // 315 // This version does not require access the frame, so it can be called 316 // from interpreted code 317 // The caller (or one of it's callers) must use a ResourceMark 318 // in order to correctly free the result. 319 // 320 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = nullptr); 321 322 static char* generate_identity_exception_message(JavaThread* thr, Klass* klass); 323 324 // Resolves a call site- may patch in the destination of the call into the 325 // compiled code. 326 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, 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, nmethod* 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(bool& is_static_call, 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(bool& is_optimized, bool& caller_is_c1, TRAPS); 345 346 // Find the method that called us. 347 static methodHandle find_callee_method(bool is_optimized, bool& caller_is_c1, TRAPS); 348 349 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread); 350 351 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current); 352 353 // Issue UL warning for unlocked JNI monitor on virtual thread termination 354 static void log_jni_monitor_still_held(); 355 356 private: 357 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS); 358 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS); 359 360 static Method* extract_attached_method(vframeStream& vfst); 361 362 #if defined(X86) && defined(COMPILER1) 363 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available. 364 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result); 365 #endif // X86 && COMPILER1 366 367 public: 368 369 // Read the array of BasicTypes from a Java signature, and compute where 370 // compiled Java code would like to put the results. Values in reg_lo and 371 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are 372 // registers, those above refer to 4-byte stack slots. All stack slots are 373 // based off of the window top. SharedInfo::stack0 refers to the first usable 374 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word 375 // 4-bytes higher. 376 // return value is the maximum number of VMReg stack slots the convention will use. 377 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed); 378 static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) { 379 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length()); 380 int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt); 381 return java_calling_convention(sig_bt, regs, total_args_passed); 382 } 383 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed); 384 static const uint java_return_convention_max_int; 385 static const uint java_return_convention_max_float; 386 387 static void check_member_name_argument_is_last_argument(const methodHandle& method, 388 const BasicType* sig_bt, 389 const VMRegPair* regs) NOT_DEBUG_RETURN; 390 391 // Ditto except for calling C 392 // 393 // C argument in register AND stack slot. 394 // Some architectures require that an argument must be passed in a register 395 // AND in a stack slot. These architectures provide a second VMRegPair array 396 // to be filled by the c_calling_convention method. On other architectures, 397 // null is being passed as the second VMRegPair array, so arguments are either 398 // passed in a register OR in a stack slot. 399 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed); 400 401 static int vector_calling_convention(VMRegPair *regs, 402 uint num_bits, 403 uint total_args_passed); 404 405 // Generate I2C and C2I adapters. These adapters are simple argument marshalling 406 // blobs. Unlike adapters in the tiger and earlier releases the code in these 407 // blobs does not create a new frame and are therefore virtually invisible 408 // to the stack walking code. In general these blobs extend the callers stack 409 // as needed for the conversion of argument locations. 410 411 // When calling a c2i blob the code will always call the interpreter even if 412 // by the time we reach the blob there is compiled code available. This allows 413 // the blob to pass the incoming stack pointer (the sender sp) in a known 414 // location for the interpreter to record. This is used by the frame code 415 // to correct the sender code to match up with the stack pointer when the 416 // thread left the compiled code. In addition it allows the interpreter 417 // to remove the space the c2i adapter allocated to do its argument conversion. 418 419 // Although a c2i blob will always run interpreted even if compiled code is 420 // present if we see that compiled code is present the compiled call site 421 // will be patched/re-resolved so that later calls will run compiled. 422 423 // Additionally a c2i blob need to have a unverified entry because it can be reached 424 // in situations where the call site is an inlined cache site and may go megamorphic. 425 426 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed 427 // that the interpreter before it does any call dispatch will record the current 428 // stack pointer in the interpreter frame. On return it will restore the stack 429 // pointer as needed. This means the i2c adapter code doesn't need any special 430 // handshaking path with compiled code to keep the stack walking correct. 431 432 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm, 433 int comp_args_on_stack, 434 const GrowableArray<SigEntry>* sig, 435 const VMRegPair* regs, 436 const GrowableArray<SigEntry>* sig_cc, 437 const VMRegPair* regs_cc, 438 const GrowableArray<SigEntry>* sig_cc_ro, 439 const VMRegPair* regs_cc_ro, 440 AdapterFingerPrint* fingerprint, 441 AdapterBlob*& new_adapter, 442 bool allocate_code_blob); 443 444 static void gen_i2c_adapter(MacroAssembler *_masm, 445 int comp_args_on_stack, 446 const GrowableArray<SigEntry>* sig, 447 const VMRegPair *regs); 448 449 // OSR support 450 451 // OSR_migration_begin will extract the jvm state from an interpreter 452 // frame (locals, monitors) and store the data in a piece of C heap 453 // storage. This then allows the interpreter frame to be removed from the 454 // stack and the OSR nmethod to be called. That method is called with a 455 // pointer to the C heap storage. This pointer is the return value from 456 // OSR_migration_begin. 457 458 static intptr_t* OSR_migration_begin(JavaThread *thread); 459 460 // OSR_migration_end is a trivial routine. It is called after the compiled 461 // method has extracted the jvm state from the C heap that OSR_migration_begin 462 // created. It's entire job is to simply free this storage. 463 static void OSR_migration_end(intptr_t* buf); 464 465 // Convert a sig into a calling convention register layout 466 // and find interesting things about it. 467 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size); 468 static VMReg name_for_receiver(); 469 470 // "Top of Stack" slots that may be unused by the calling convention but must 471 // otherwise be preserved. 472 // On Intel these are not necessary and the value can be zero. 473 // On Sparc this describes the words reserved for storing a register window 474 // when an interrupt occurs. 475 static uint out_preserve_stack_slots(); 476 477 // Stack slots that may be unused by the calling convention but must 478 // otherwise be preserved. On Intel this includes the return address. 479 // On PowerPC it includes the 4 words holding the old TOC & LR glue. 480 static uint in_preserve_stack_slots(); 481 482 // Is vector's size (in bytes) bigger than a size saved by default? 483 // For example, on x86 16 bytes XMM registers are saved by default. 484 static bool is_wide_vector(int size); 485 486 // Save and restore a native result 487 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots); 488 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots); 489 490 // Generate a native wrapper for a given method. The method takes arguments 491 // in the Java compiled code convention, marshals them to the native 492 // convention (handlizes oops, etc), transitions to native, makes the call, 493 // returns to java state (possibly blocking), unhandlizes any result and 494 // returns. 495 // 496 // The wrapper may contain special-case code if the given method 497 // is a compiled method handle adapter, such as _invokeBasic, _linkToVirtual, etc. 498 static nmethod* generate_native_wrapper(MacroAssembler* masm, 499 const methodHandle& method, 500 int compile_id, 501 BasicType* sig_bt, 502 VMRegPair* regs, 503 BasicType ret_type); 504 505 // A compiled caller has just called the interpreter, but compiled code 506 // exists. Patch the caller so he no longer calls into the interpreter. 507 static void fixup_callers_callsite(Method* moop, address ret_pc); 508 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb); 509 510 // Slow-path Locking and Unlocking 511 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current); 512 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current); 513 514 // Resolving of calls 515 static address get_resolved_entry (JavaThread* current, methodHandle callee_method, 516 bool is_static_call, bool is_optimized, bool caller_is_c1); 517 static address resolve_static_call_C (JavaThread* current); 518 static address resolve_virtual_call_C (JavaThread* current); 519 static address resolve_opt_virtual_call_C(JavaThread* current); 520 521 static void load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res); 522 static void store_inline_type_fields_to_buf(JavaThread* current, intptr_t res); 523 524 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.) 525 static void slow_arraycopy_C(oopDesc* src, jint src_pos, 526 oopDesc* dest, jint dest_pos, 527 jint length, JavaThread* thread); 528 529 // handle ic miss with caller being compiled code 530 // wrong method handling (inline cache misses) 531 static address handle_wrong_method(JavaThread* current); 532 static address handle_wrong_method_abstract(JavaThread* current); 533 static address handle_wrong_method_ic_miss(JavaThread* current); 534 static void allocate_inline_types(JavaThread* current, Method* callee, bool allocate_receiver); 535 static oop allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, TRAPS); 536 537 static address handle_unsafe_access(JavaThread* thread, address next_pc); 538 539 static BufferedInlineTypeBlob* generate_buffered_inline_type_adapter(const InlineKlass* vk); 540 #ifndef PRODUCT 541 542 // Collect and print inline cache miss statistics 543 private: 544 enum { maxICmiss_count = 100 }; 545 static int _ICmiss_index; // length of IC miss histogram 546 static int _ICmiss_count[maxICmiss_count]; // miss counts 547 static address _ICmiss_at[maxICmiss_count]; // miss addresses 548 static void trace_ic_miss(address at); 549 550 public: 551 static uint _ic_miss_ctr; // total # of IC misses 552 static uint _wrong_method_ctr; 553 static uint _resolve_static_ctr; 554 static uint _resolve_virtual_ctr; 555 static uint _resolve_opt_virtual_ctr; 556 static uint _implicit_null_throws; 557 static uint _implicit_div0_throws; 558 559 static uint _jbyte_array_copy_ctr; // Slow-path byte array copy 560 static uint _jshort_array_copy_ctr; // Slow-path short array copy 561 static uint _jint_array_copy_ctr; // Slow-path int array copy 562 static uint _jlong_array_copy_ctr; // Slow-path long array copy 563 static uint _oop_array_copy_ctr; // Slow-path oop array copy 564 static uint _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast 565 static uint _unsafe_array_copy_ctr; // Slow-path includes alignment checks 566 static uint _generic_array_copy_ctr; // Slow-path includes type decoding 567 static uint _slow_array_copy_ctr; // Slow-path failed out to a method call 568 569 static uint _unsafe_set_memory_ctr; // Slow-path includes alignment checks 570 571 static uint _new_instance_ctr; // 'new' object requires GC 572 static uint _new_array_ctr; // 'new' array requires GC 573 static uint _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr; 574 static uint _find_handler_ctr; // find exception handler 575 static uint _rethrow_ctr; // rethrow exception 576 static uint _mon_enter_stub_ctr; // monitor enter stub 577 static uint _mon_exit_stub_ctr; // monitor exit stub 578 static uint _mon_enter_ctr; // monitor enter slow 579 static uint _mon_exit_ctr; // monitor exit slow 580 static uint _partial_subtype_ctr; // SubRoutines::partial_subtype_check 581 582 // Statistics code 583 // stats for "normal" compiled calls (non-interface) 584 static int64_t _nof_normal_calls; // total # of calls 585 static int64_t _nof_inlined_calls; // total # of inlined normal calls 586 static int64_t _nof_static_calls; // total # of calls to static methods or super methods (invokespecial) 587 static int64_t _nof_inlined_static_calls; // total # of inlined static calls 588 // stats for compiled interface calls 589 static int64_t _nof_interface_calls; // total # of compiled calls 590 static int64_t _nof_inlined_interface_calls; // total # of inlined interface calls 591 592 public: // for compiler 593 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; } 594 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; } 595 static address nof_static_calls_addr() { return (address)&_nof_static_calls; } 596 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; } 597 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; } 598 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; } 599 static void print_call_statistics(uint64_t comp_total); 600 static void print_ic_miss_histogram(); 601 602 #endif // PRODUCT 603 604 static void print_statistics() PRODUCT_RETURN; 605 }; 606 607 608 // --------------------------------------------------------------------------- 609 // Implementation of AdapterHandlerLibrary 610 // 611 // This library manages argument marshaling adapters and native wrappers. 612 // There are 2 flavors of adapters: I2C and C2I. 613 // 614 // The I2C flavor takes a stock interpreted call setup, marshals the 615 // arguments for a Java-compiled call, and jumps to Rmethod-> code()-> 616 // code_begin(). It is broken to call it without an nmethod assigned. 617 // The usual behavior is to lift any register arguments up out of the 618 // stack and possibly re-pack the extra arguments to be contiguous. 619 // I2C adapters will save what the interpreter's stack pointer will be 620 // after arguments are popped, then adjust the interpreter's frame 621 // size to force alignment and possibly to repack the arguments. 622 // After re-packing, it jumps to the compiled code start. There are 623 // no safepoints in this adapter code and a GC cannot happen while 624 // marshaling is in progress. 625 // 626 // The C2I flavor takes a stock compiled call setup plus the target method in 627 // Rmethod, marshals the arguments for an interpreted call and jumps to 628 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been 629 // setup. Compiled frames are fixed-size and the args are likely not in the 630 // right place. Hence all the args will likely be copied into the 631 // interpreter's frame, forcing that frame to grow. The compiled frame's 632 // outgoing stack args will be dead after the copy. 633 // 634 // Native wrappers, like adapters, marshal arguments. Unlike adapters they 635 // also perform an official frame push & pop. They have a call to the native 636 // routine in their middles and end in a return (instead of ending in a jump). 637 // The native wrappers are stored in real nmethods instead of the BufferBlobs 638 // used by the adapters. The code generation happens here because it's very 639 // similar to what the adapters have to do. 640 641 class AdapterHandlerEntry : public CHeapObj<mtCode> { 642 friend class AdapterHandlerLibrary; 643 644 private: 645 AdapterFingerPrint* _fingerprint; 646 address _i2c_entry; 647 address _c2i_entry; 648 address _c2i_inline_entry; 649 address _c2i_inline_ro_entry; 650 address _c2i_unverified_entry; 651 address _c2i_unverified_inline_entry; 652 address _c2i_no_clinit_check_entry; 653 654 // Support for scalarized inline type calling convention 655 const GrowableArray<SigEntry>* _sig_cc; 656 657 #ifdef ASSERT 658 // Captures code and signature used to generate this adapter when 659 // verifying adapter equivalence. 660 unsigned char* _saved_code; 661 int _saved_code_length; 662 #endif 663 664 AdapterHandlerEntry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, 665 address c2i_inline_entry, address c2i_inline_ro_entry, 666 address c2i_unverified_entry, address c2i_unverified_inline_entry, 667 address c2i_no_clinit_check_entry) : 668 _fingerprint(fingerprint), 669 _i2c_entry(i2c_entry), 670 _c2i_entry(c2i_entry), 671 _c2i_inline_entry(c2i_inline_entry), 672 _c2i_inline_ro_entry(c2i_inline_ro_entry), 673 _c2i_unverified_entry(c2i_unverified_entry), 674 _c2i_unverified_inline_entry(c2i_unverified_inline_entry), 675 _c2i_no_clinit_check_entry(c2i_no_clinit_check_entry), 676 _sig_cc(nullptr) 677 #ifdef ASSERT 678 , _saved_code_length(0) 679 #endif 680 { } 681 682 ~AdapterHandlerEntry(); 683 684 public: 685 address get_i2c_entry() const { return _i2c_entry; } 686 address get_c2i_entry() const { return _c2i_entry; } 687 address get_c2i_inline_entry() const { return _c2i_inline_entry; } 688 address get_c2i_inline_ro_entry() const { return _c2i_inline_ro_entry; } 689 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; } 690 address get_c2i_unverified_inline_entry() const { return _c2i_unverified_inline_entry; } 691 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; } 692 693 address base_address(); 694 void relocate(address new_base); 695 696 // Support for scalarized inline type calling convention 697 void set_sig_cc(const GrowableArray<SigEntry>* sig) { _sig_cc = sig; } 698 const GrowableArray<SigEntry>* get_sig_cc() const { return _sig_cc; } 699 700 AdapterFingerPrint* fingerprint() const { return _fingerprint; } 701 702 #ifdef ASSERT 703 // Used to verify that code generated for shared adapters is equivalent 704 void save_code (unsigned char* code, int length); 705 bool compare_code(AdapterHandlerEntry* other); 706 #endif 707 708 //virtual void print_on(outputStream* st) const; DO NOT USE 709 void print_adapter_on(outputStream* st) const; 710 }; 711 712 class CompiledEntrySignature; 713 714 class AdapterHandlerLibrary: public AllStatic { 715 friend class SharedRuntime; 716 private: 717 static BufferBlob* _buffer; // the temporary code buffer in CodeCache 718 static AdapterHandlerEntry* _abstract_method_handler; 719 static AdapterHandlerEntry* _no_arg_handler; 720 static AdapterHandlerEntry* _int_arg_handler; 721 static AdapterHandlerEntry* _obj_arg_handler; 722 static AdapterHandlerEntry* _obj_int_arg_handler; 723 static AdapterHandlerEntry* _obj_obj_arg_handler; 724 725 static BufferBlob* buffer_blob(); 726 static void initialize(); 727 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter, 728 CompiledEntrySignature& ces, 729 bool allocate_code_blob); 730 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method); 731 public: 732 733 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, 734 address i2c_entry, address c2i_entry, address c2i_inline_entry, address c2i_inline_ro_entry, 735 address c2i_unverified_entry, address c2i_unverified_inline_entry, address c2i_no_clinit_check_entry = nullptr); 736 static void create_native_wrapper(const methodHandle& method); 737 static AdapterHandlerEntry* get_adapter(const methodHandle& method); 738 739 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); } 740 static void print_handler_on(outputStream* st, const CodeBlob* b); 741 static bool contains(const CodeBlob* b); 742 #ifndef PRODUCT 743 static void print_statistics(); 744 #endif // PRODUCT 745 746 }; 747 748 // Utility class for computing the calling convention of the 3 types 749 // of compiled method entries: 750 // Method::_from_compiled_entry - sig_cc 751 // Method::_from_compiled_inline_ro_entry - sig_cc_ro 752 // Method::_from_compiled_inline_entry - sig 753 class CompiledEntrySignature : public StackObj { 754 Method* _method; 755 int _num_inline_args; 756 bool _has_inline_recv; 757 GrowableArray<SigEntry>* _sig; 758 GrowableArray<SigEntry>* _sig_cc; 759 GrowableArray<SigEntry>* _sig_cc_ro; 760 VMRegPair* _regs; 761 VMRegPair* _regs_cc; 762 VMRegPair* _regs_cc_ro; 763 764 int _args_on_stack; 765 int _args_on_stack_cc; 766 int _args_on_stack_cc_ro; 767 768 bool _c1_needs_stack_repair; 769 bool _c2_needs_stack_repair; 770 771 GrowableArray<Method*>* _supers; 772 773 public: 774 Method* method() const { return _method; } 775 776 // Used by Method::_from_compiled_inline_entry 777 GrowableArray<SigEntry>* sig() const { return _sig; } 778 779 // Used by Method::_from_compiled_entry 780 GrowableArray<SigEntry>* sig_cc() const { return _sig_cc; } 781 782 // Used by Method::_from_compiled_inline_ro_entry 783 GrowableArray<SigEntry>* sig_cc_ro() const { return _sig_cc_ro; } 784 785 VMRegPair* regs() const { return _regs; } 786 VMRegPair* regs_cc() const { return _regs_cc; } 787 VMRegPair* regs_cc_ro() const { return _regs_cc_ro; } 788 789 int args_on_stack() const { return _args_on_stack; } 790 int args_on_stack_cc() const { return _args_on_stack_cc; } 791 int args_on_stack_cc_ro() const { return _args_on_stack_cc_ro; } 792 793 int num_inline_args() const { return _num_inline_args; } 794 bool has_inline_recv() const { return _has_inline_recv; } 795 796 bool has_scalarized_args() const { return _sig != _sig_cc; } 797 bool c1_needs_stack_repair() const { return _c1_needs_stack_repair; } 798 bool c2_needs_stack_repair() const { return _c2_needs_stack_repair; } 799 CodeOffsets::Entries c1_inline_ro_entry_type() const; 800 801 GrowableArray<Method*>* get_supers(); 802 803 CompiledEntrySignature(Method* method = nullptr); 804 void compute_calling_conventions(bool init = true); 805 }; 806 807 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP --- EOF ---