1 /* 2 * Copyright (c) 1997, 2025, 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 "runtime/stubDeclarations.hpp" 36 #include "utilities/macros.hpp" 37 38 class AdapterHandlerEntry; 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 // define SharedStubId enum tags: wrong_method_id, etc 50 51 #define SHARED_STUB_ID_ENUM_DECLARE(name, type) STUB_ID_NAME(name), 52 enum class SharedStubId :int { 53 NO_STUBID = -1, 54 SHARED_STUBS_DO(SHARED_STUB_ID_ENUM_DECLARE) 55 NUM_STUBIDS 56 }; 57 #undef SHARED_STUB_ID_ENUM_DECLARE 58 59 class SharedRuntime: AllStatic { 60 private: 61 // Declare shared stub fields 62 #define SHARED_STUB_FIELD_DECLARE(name, type) \ 63 static type BLOB_FIELD_NAME(name); 64 SHARED_STUBS_DO(SHARED_STUB_FIELD_DECLARE) 65 #undef SHARED_STUB_FIELD_DECLARE 66 67 #ifdef ASSERT 68 static bool is_resolve_id(SharedStubId id) { 69 return (id == SharedStubId::wrong_method_id || 70 id == SharedStubId::wrong_method_abstract_id || 71 id == SharedStubId::ic_miss_id || 72 id == SharedStubId::resolve_opt_virtual_call_id || 73 id == SharedStubId::resolve_virtual_call_id || 74 id == SharedStubId::resolve_static_call_id); 75 } 76 static bool is_polling_page_id(SharedStubId id) { 77 return (id == SharedStubId::polling_page_vectors_safepoint_handler_id || 78 id == SharedStubId::polling_page_safepoint_handler_id || 79 id == SharedStubId::polling_page_return_handler_id); 80 } 81 static bool is_throw_id(SharedStubId id) { 82 return (id == SharedStubId::throw_AbstractMethodError_id || 83 id == SharedStubId::throw_IncompatibleClassChangeError_id || 84 id == SharedStubId::throw_NullPointerException_at_call_id || 85 id == SharedStubId::throw_StackOverflowError_id || 86 id == SharedStubId::throw_delayed_StackOverflowError_id); 87 } 88 #endif 89 90 // cont_doYieldStub is not yet folded into the general model for 91 // shared stub/blob handling. It is actually a specially generated 92 // native wrapper for a specific native method, as also is it's 93 // counterpart the continuation do_enter method. 94 static nmethod* _cont_doYield_stub; 95 96 // Stub names indexed by SharedStubId 97 static const char *_stub_names[]; 98 99 #ifndef PRODUCT 100 // Counters 101 static int64_t _nof_megamorphic_calls; // total # of megamorphic calls (through vtable) 102 #endif // !PRODUCT 103 104 private: 105 static SafepointBlob* generate_handler_blob(SharedStubId id, address call_ptr); 106 static RuntimeStub* generate_resolve_blob(SharedStubId id, address destination); 107 static RuntimeStub* generate_throw_exception(SharedStubId id, address runtime_entry); 108 public: 109 static void generate_initial_stubs(void); 110 static void generate_stubs(void); 111 #if INCLUDE_JFR 112 static void generate_jfr_stubs(void); 113 // For c2: c_rarg0 is junk, call to runtime to write a checkpoint. 114 // It returns a jobject handle to the event writer. 115 // The handle is dereferenced and the return value is the event writer oop. 116 static RuntimeStub* generate_jfr_write_checkpoint(); 117 // For c2: call to runtime to return a buffer lease. 118 static RuntimeStub* generate_jfr_return_lease(); 119 #endif 120 121 static const char *stub_name(SharedStubId id) { 122 assert(id > SharedStubId::NO_STUBID && id < SharedStubId::NUM_STUBIDS, "stub id out of range"); 123 return _stub_names[(int)id]; 124 } 125 126 // max bytes for each dtrace string parameter 127 enum { max_dtrace_string_size = 256 }; 128 129 // The following arithmetic routines are used on platforms that do 130 // not have machine instructions to implement their functionality. 131 // Do not remove these. 132 133 // long arithmetics 134 static jlong lmul(jlong y, jlong x); 135 static jlong ldiv(jlong y, jlong x); 136 static jlong lrem(jlong y, jlong x); 137 138 // float and double remainder 139 static jfloat frem(jfloat x, jfloat y); 140 static jdouble drem(jdouble x, jdouble y); 141 142 143 #ifdef _WIN64 144 // Workaround for fmod issue in the Windows x64 CRT 145 static double fmod_winx64(double x, double y); 146 #endif 147 148 #ifdef __SOFTFP__ 149 static jfloat fadd(jfloat x, jfloat y); 150 static jfloat fsub(jfloat x, jfloat y); 151 static jfloat fmul(jfloat x, jfloat y); 152 static jfloat fdiv(jfloat x, jfloat y); 153 154 static jdouble dadd(jdouble x, jdouble y); 155 static jdouble dsub(jdouble x, jdouble y); 156 static jdouble dmul(jdouble x, jdouble y); 157 static jdouble ddiv(jdouble x, jdouble y); 158 #endif // __SOFTFP__ 159 160 // float conversion (needs to set appropriate rounding mode) 161 static jint f2i (jfloat x); 162 static jlong f2l (jfloat x); 163 static jint d2i (jdouble x); 164 static jlong d2l (jdouble x); 165 static jfloat d2f (jdouble x); 166 static jfloat l2f (jlong x); 167 static jdouble l2d (jlong x); 168 static jfloat i2f (jint x); 169 170 #ifdef __SOFTFP__ 171 static jdouble i2d (jint x); 172 static jdouble f2d (jfloat x); 173 #endif // __SOFTFP__ 174 175 // double trigonometrics and transcendentals 176 static jdouble dsin(jdouble x); 177 static jdouble dcos(jdouble x); 178 static jdouble dtan(jdouble x); 179 static jdouble dlog(jdouble x); 180 static jdouble dlog10(jdouble x); 181 static jdouble dexp(jdouble x); 182 static jdouble dpow(jdouble x, jdouble y); 183 184 #if defined(__SOFTFP__) || defined(E500V2) 185 static double dabs(double f); 186 #endif 187 188 #if defined(__SOFTFP__) || defined(PPC) 189 static double dsqrt(double f); 190 #endif 191 192 // Montgomery multiplication 193 static void montgomery_multiply(jint *a_ints, jint *b_ints, jint *n_ints, 194 jint len, jlong inv, jint *m_ints); 195 static void montgomery_square(jint *a_ints, jint *n_ints, 196 jint len, jlong inv, jint *m_ints); 197 198 #ifdef __SOFTFP__ 199 // C++ compiler generates soft float instructions as well as passing 200 // float and double in registers. 201 static int fcmpl(float x, float y); 202 static int fcmpg(float x, float y); 203 static int dcmpl(double x, double y); 204 static int dcmpg(double x, double y); 205 206 static int unordered_fcmplt(float x, float y); 207 static int unordered_dcmplt(double x, double y); 208 static int unordered_fcmple(float x, float y); 209 static int unordered_dcmple(double x, double y); 210 static int unordered_fcmpge(float x, float y); 211 static int unordered_dcmpge(double x, double y); 212 static int unordered_fcmpgt(float x, float y); 213 static int unordered_dcmpgt(double x, double y); 214 215 static float fneg(float f); 216 static double dneg(double f); 217 #endif 218 219 // exception handling across interpreter/compiler boundaries 220 static address raw_exception_handler_for_return_address(JavaThread* current, address return_address); 221 static address exception_handler_for_return_address(JavaThread* current, address return_address); 222 223 // exception handling and implicit exceptions 224 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, 225 bool force_unwind, bool top_frame_only, bool& recursive_exception_occurred); 226 enum ImplicitExceptionKind { 227 IMPLICIT_NULL, 228 IMPLICIT_DIVIDE_BY_ZERO, 229 STACK_OVERFLOW 230 }; 231 static void throw_AbstractMethodError(JavaThread* current); 232 static void throw_IncompatibleClassChangeError(JavaThread* current); 233 static void throw_ArithmeticException(JavaThread* current); 234 static void throw_NullPointerException(JavaThread* current); 235 static void throw_NullPointerException_at_call(JavaThread* current); 236 static void throw_StackOverflowError(JavaThread* current); 237 static void throw_delayed_StackOverflowError(JavaThread* current); 238 static void throw_StackOverflowError_common(JavaThread* current, bool delayed); 239 static address continuation_for_implicit_exception(JavaThread* current, 240 address faulting_pc, 241 ImplicitExceptionKind exception_kind); 242 243 // Post-slow-path-allocation, pre-initializing-stores step for 244 // implementing e.g. ReduceInitialCardMarks 245 static void on_slowpath_allocation_exit(JavaThread* current); 246 247 static void enable_stack_reserved_zone(JavaThread* current); 248 static frame look_for_reserved_stack_annotated_method(JavaThread* current, frame fr); 249 250 // Shared stub locations 251 static address get_poll_stub(address pc); 252 253 static address get_ic_miss_stub() { 254 assert(_ic_miss_blob!= nullptr, "oops"); 255 return _ic_miss_blob->entry_point(); 256 } 257 258 static address get_handle_wrong_method_stub() { 259 assert(_wrong_method_blob!= nullptr, "oops"); 260 return _wrong_method_blob->entry_point(); 261 } 262 263 static address get_handle_wrong_method_abstract_stub() { 264 assert(_wrong_method_abstract_blob!= nullptr, "oops"); 265 return _wrong_method_abstract_blob->entry_point(); 266 } 267 268 static address get_resolve_opt_virtual_call_stub() { 269 assert(_resolve_opt_virtual_call_blob != nullptr, "oops"); 270 return _resolve_opt_virtual_call_blob->entry_point(); 271 } 272 static address get_resolve_virtual_call_stub() { 273 assert(_resolve_virtual_call_blob != nullptr, "oops"); 274 return _resolve_virtual_call_blob->entry_point(); 275 } 276 static address get_resolve_static_call_stub() { 277 assert(_resolve_static_call_blob != nullptr, "oops"); 278 return _resolve_static_call_blob->entry_point(); 279 } 280 281 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; } 282 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; } 283 static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; } 284 285 static nmethod* cont_doYield_stub() { 286 assert(_cont_doYield_stub != nullptr, "oops"); 287 return _cont_doYield_stub; 288 } 289 290 // Implicit exceptions 291 static address throw_AbstractMethodError_entry() { return _throw_AbstractMethodError_blob->entry_point(); } 292 static address throw_IncompatibleClassChangeError_entry() { return _throw_IncompatibleClassChangeError_blob->entry_point(); } 293 static address throw_NullPointerException_at_call_entry() { return _throw_NullPointerException_at_call_blob->entry_point(); } 294 static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_blob->entry_point(); } 295 static address throw_delayed_StackOverflowError_entry() { return _throw_delayed_StackOverflowError_blob->entry_point(); } 296 297 #if INCLUDE_JFR 298 static address jfr_write_checkpoint() { return _jfr_write_checkpoint_blob->entry_point(); } 299 static address jfr_return_lease() { return _jfr_return_lease_blob->entry_point(); } 300 #endif 301 302 // Counters 303 #ifndef PRODUCT 304 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; } 305 #endif // PRODUCT 306 307 // Helper routine for full-speed JVMTI exception throwing support 308 static void throw_and_post_jvmti_exception(JavaThread* current, Handle h_exception); 309 static void throw_and_post_jvmti_exception(JavaThread* current, Symbol* name, const char *message = nullptr); 310 311 #if INCLUDE_JVMTI 312 // Functions for JVMTI notifications 313 static void notify_jvmti_vthread_start(oopDesc* vt, jboolean hide, JavaThread* current); 314 static void notify_jvmti_vthread_end(oopDesc* vt, jboolean hide, JavaThread* current); 315 static void notify_jvmti_vthread_mount(oopDesc* vt, jboolean hide, JavaThread* current); 316 static void notify_jvmti_vthread_unmount(oopDesc* vt, jboolean hide, JavaThread* current); 317 #endif 318 319 // RedefineClasses() tracing support for obsolete method entry 320 static int rc_trace_method_entry(JavaThread* thread, Method* m); 321 322 // To be used as the entry point for unresolved native methods. 323 static address native_method_throw_unsatisfied_link_error_entry(); 324 325 static void register_finalizer(JavaThread* thread, oopDesc* obj); 326 327 // dtrace notifications 328 static int dtrace_object_alloc(oopDesc* o); 329 static int dtrace_object_alloc(JavaThread* thread, oopDesc* o); 330 static int dtrace_object_alloc(JavaThread* thread, oopDesc* o, size_t size); 331 static int dtrace_method_entry(JavaThread* thread, Method* m); 332 static int dtrace_method_exit(JavaThread* thread, Method* m); 333 334 // Utility method for retrieving the Java thread id, returns 0 if the 335 // thread is not a well formed Java thread. 336 static jlong get_java_tid(JavaThread* thread); 337 338 339 // used by native wrappers to re-enable yellow if overflow happened in native code 340 static void reguard_yellow_pages(); 341 342 // Fill in the "X cannot be cast to a Y" message for ClassCastException 343 // 344 // @param thr the current thread 345 // @param caster_klass the class of the object we are casting 346 // @return the dynamically allocated exception message (must be freed 347 // by the caller using a resource mark) 348 // 349 // BCP must refer to the current 'checkcast' opcode for the frame 350 // on top of the stack. 351 // The caller (or one of its callers) must use a ResourceMark 352 // in order to correctly free the result. 353 // 354 static char* generate_class_cast_message(JavaThread* thr, Klass* caster_klass); 355 356 // Fill in the "X cannot be cast to a Y" message for ClassCastException 357 // 358 // @param caster_klass the class of the object we are casting 359 // @param target_klass the target klass attempt 360 // @return the dynamically allocated exception message (must be freed 361 // by the caller using a resource mark) 362 // 363 // This version does not require access the frame, so it can be called 364 // from interpreted code 365 // The caller (or one of it's callers) must use a ResourceMark 366 // in order to correctly free the result. 367 // 368 static char* generate_class_cast_message(Klass* caster_klass, Klass* target_klass, Symbol* target_klass_name = nullptr); 369 370 static char* generate_identity_exception_message(JavaThread* thr, Klass* klass); 371 372 // Resolves a call site- may patch in the destination of the call into the 373 // compiled code. 374 static methodHandle resolve_helper(bool is_virtual, bool is_optimized, bool& caller_is_c1, TRAPS); 375 376 private: 377 // deopt blob 378 static void generate_deopt_blob(void); 379 380 static bool handle_ic_miss_helper_internal(Handle receiver, nmethod* caller_nm, const frame& caller_frame, 381 methodHandle callee_method, Bytecodes::Code bc, CallInfo& call_info, 382 bool& needs_ic_stub_refill, bool& is_optimized, bool caller_is_c1, TRAPS); 383 384 public: 385 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; } 386 387 // Resets a call-site in compiled code so it will get resolved again. 388 static methodHandle reresolve_call_site(bool& is_static_call, bool& is_optimized, bool& caller_is_c1, TRAPS); 389 390 // In the code prolog, if the klass comparison fails, the inline cache 391 // misses and the call site is patched to megamorphic 392 static methodHandle handle_ic_miss_helper(bool& is_optimized, bool& caller_is_c1, TRAPS); 393 394 // Find the method that called us. 395 static methodHandle find_callee_method(bool is_optimized, bool& caller_is_c1, TRAPS); 396 397 static void monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* thread); 398 399 static void monitor_exit_helper(oopDesc* obj, BasicLock* lock, JavaThread* current); 400 401 // Issue UL warning for unlocked JNI monitor on virtual thread termination 402 static void log_jni_monitor_still_held(); 403 404 private: 405 static Handle find_callee_info(Bytecodes::Code& bc, CallInfo& callinfo, TRAPS); 406 static Handle find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS); 407 408 static Method* extract_attached_method(vframeStream& vfst); 409 410 #if defined(X86) && defined(COMPILER1) 411 // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available. 412 static void inline_check_hashcode_from_object_header(MacroAssembler* masm, const methodHandle& method, Register obj_reg, Register result); 413 #endif // X86 && COMPILER1 414 415 public: 416 417 // Read the array of BasicTypes from a Java signature, and compute where 418 // compiled Java code would like to put the results. Values in reg_lo and 419 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are 420 // registers, those above refer to 4-byte stack slots. All stack slots are 421 // based off of the window top. SharedInfo::stack0 refers to the first usable 422 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word 423 // 4-bytes higher. 424 // return value is the maximum number of VMReg stack slots the convention will use. 425 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed); 426 static int java_calling_convention(const GrowableArray<SigEntry>* sig, VMRegPair* regs) { 427 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sig->length()); 428 int total_args_passed = SigEntry::fill_sig_bt(sig, sig_bt); 429 return java_calling_convention(sig_bt, regs, total_args_passed); 430 } 431 static int java_return_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed); 432 static const uint java_return_convention_max_int; 433 static const uint java_return_convention_max_float; 434 435 static void check_member_name_argument_is_last_argument(const methodHandle& method, 436 const BasicType* sig_bt, 437 const VMRegPair* regs) NOT_DEBUG_RETURN; 438 439 // Ditto except for calling C 440 // 441 // C argument in register AND stack slot. 442 // Some architectures require that an argument must be passed in a register 443 // AND in a stack slot. These architectures provide a second VMRegPair array 444 // to be filled by the c_calling_convention method. On other architectures, 445 // null is being passed as the second VMRegPair array, so arguments are either 446 // passed in a register OR in a stack slot. 447 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed); 448 449 static int vector_calling_convention(VMRegPair *regs, 450 uint num_bits, 451 uint total_args_passed); 452 453 // Generate I2C and C2I adapters. These adapters are simple argument marshalling 454 // blobs. Unlike adapters in the tiger and earlier releases the code in these 455 // blobs does not create a new frame and are therefore virtually invisible 456 // to the stack walking code. In general these blobs extend the callers stack 457 // as needed for the conversion of argument locations. 458 459 // When calling a c2i blob the code will always call the interpreter even if 460 // by the time we reach the blob there is compiled code available. This allows 461 // the blob to pass the incoming stack pointer (the sender sp) in a known 462 // location for the interpreter to record. This is used by the frame code 463 // to correct the sender code to match up with the stack pointer when the 464 // thread left the compiled code. In addition it allows the interpreter 465 // to remove the space the c2i adapter allocated to do its argument conversion. 466 467 // Although a c2i blob will always run interpreted even if compiled code is 468 // present if we see that compiled code is present the compiled call site 469 // will be patched/re-resolved so that later calls will run compiled. 470 471 // Additionally a c2i blob need to have a unverified entry because it can be reached 472 // in situations where the call site is an inlined cache site and may go megamorphic. 473 474 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed 475 // that the interpreter before it does any call dispatch will record the current 476 // stack pointer in the interpreter frame. On return it will restore the stack 477 // pointer as needed. This means the i2c adapter code doesn't need any special 478 // handshaking path with compiled code to keep the stack walking correct. 479 480 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *masm, 481 int comp_args_on_stack, 482 const GrowableArray<SigEntry>* sig, 483 const VMRegPair* regs, 484 const GrowableArray<SigEntry>* sig_cc, 485 const VMRegPair* regs_cc, 486 const GrowableArray<SigEntry>* sig_cc_ro, 487 const VMRegPair* regs_cc_ro, 488 AdapterFingerPrint* fingerprint, 489 AdapterBlob*& new_adapter, 490 bool allocate_code_blob); 491 492 static void gen_i2c_adapter(MacroAssembler *_masm, 493 int comp_args_on_stack, 494 const GrowableArray<SigEntry>* sig, 495 const VMRegPair *regs); 496 497 // OSR support 498 499 // OSR_migration_begin will extract the jvm state from an interpreter 500 // frame (locals, monitors) and store the data in a piece of C heap 501 // storage. This then allows the interpreter frame to be removed from the 502 // stack and the OSR nmethod to be called. That method is called with a 503 // pointer to the C heap storage. This pointer is the return value from 504 // OSR_migration_begin. 505 506 static intptr_t* OSR_migration_begin(JavaThread *thread); 507 508 // OSR_migration_end is a trivial routine. It is called after the compiled 509 // method has extracted the jvm state from the C heap that OSR_migration_begin 510 // created. It's entire job is to simply free this storage. 511 static void OSR_migration_end(intptr_t* buf); 512 513 // Convert a sig into a calling convention register layout 514 // and find interesting things about it. 515 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size); 516 static VMReg name_for_receiver(); 517 518 // "Top of Stack" slots that may be unused by the calling convention but must 519 // otherwise be preserved. 520 // On Intel these are not necessary and the value can be zero. 521 // On Sparc this describes the words reserved for storing a register window 522 // when an interrupt occurs. 523 static uint out_preserve_stack_slots(); 524 525 // Stack slots that may be unused by the calling convention but must 526 // otherwise be preserved. On Intel this includes the return address. 527 // On PowerPC it includes the 4 words holding the old TOC & LR glue. 528 static uint in_preserve_stack_slots(); 529 530 static VMReg thread_register(); 531 532 static void continuation_enter_cleanup(MacroAssembler* masm); 533 534 // Is vector's size (in bytes) bigger than a size saved by default? 535 // For example, on x86 16 bytes XMM registers are saved by default. 536 static bool is_wide_vector(int size); 537 538 // Save and restore a native result 539 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots); 540 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots); 541 542 // Generate a native wrapper for a given method. The method takes arguments 543 // in the Java compiled code convention, marshals them to the native 544 // convention (handlizes oops, etc), transitions to native, makes the call, 545 // returns to java state (possibly blocking), unhandlizes any result and 546 // returns. 547 // 548 // The wrapper may contain special-case code if the given method 549 // is a compiled method handle adapter, such as _invokeBasic, _linkToVirtual, etc. 550 static nmethod* generate_native_wrapper(MacroAssembler* masm, 551 const methodHandle& method, 552 int compile_id, 553 BasicType* sig_bt, 554 VMRegPair* regs, 555 BasicType ret_type); 556 557 // A compiled caller has just called the interpreter, but compiled code 558 // exists. Patch the caller so he no longer calls into the interpreter. 559 static void fixup_callers_callsite(Method* moop, address ret_pc); 560 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb); 561 562 // Slow-path Locking and Unlocking 563 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* current); 564 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* current); 565 566 // Resolving of calls 567 static address get_resolved_entry (JavaThread* current, methodHandle callee_method, 568 bool is_static_call, bool is_optimized, bool caller_is_c1); 569 static address resolve_static_call_C (JavaThread* current); 570 static address resolve_virtual_call_C (JavaThread* current); 571 static address resolve_opt_virtual_call_C(JavaThread* current); 572 573 static void load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res); 574 static void store_inline_type_fields_to_buf(JavaThread* current, intptr_t res); 575 576 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.) 577 static void slow_arraycopy_C(oopDesc* src, jint src_pos, 578 oopDesc* dest, jint dest_pos, 579 jint length, JavaThread* thread); 580 581 // handle ic miss with caller being compiled code 582 // wrong method handling (inline cache misses) 583 static address handle_wrong_method(JavaThread* current); 584 static address handle_wrong_method_abstract(JavaThread* current); 585 static address handle_wrong_method_ic_miss(JavaThread* current); 586 static void allocate_inline_types(JavaThread* current, Method* callee, bool allocate_receiver); 587 static oop allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, TRAPS); 588 589 static address handle_unsafe_access(JavaThread* thread, address next_pc); 590 591 static BufferedInlineTypeBlob* generate_buffered_inline_type_adapter(const InlineKlass* vk); 592 #ifndef PRODUCT 593 594 // Collect and print inline cache miss statistics 595 private: 596 enum { maxICmiss_count = 100 }; 597 static int _ICmiss_index; // length of IC miss histogram 598 static int _ICmiss_count[maxICmiss_count]; // miss counts 599 static address _ICmiss_at[maxICmiss_count]; // miss addresses 600 static void trace_ic_miss(address at); 601 602 public: 603 static uint _ic_miss_ctr; // total # of IC misses 604 static uint _wrong_method_ctr; 605 static uint _resolve_static_ctr; 606 static uint _resolve_virtual_ctr; 607 static uint _resolve_opt_virtual_ctr; 608 static uint _implicit_null_throws; 609 static uint _implicit_div0_throws; 610 611 static uint _jbyte_array_copy_ctr; // Slow-path byte array copy 612 static uint _jshort_array_copy_ctr; // Slow-path short array copy 613 static uint _jint_array_copy_ctr; // Slow-path int array copy 614 static uint _jlong_array_copy_ctr; // Slow-path long array copy 615 static uint _oop_array_copy_ctr; // Slow-path oop array copy 616 static uint _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast 617 static uint _unsafe_array_copy_ctr; // Slow-path includes alignment checks 618 static uint _generic_array_copy_ctr; // Slow-path includes type decoding 619 static uint _slow_array_copy_ctr; // Slow-path failed out to a method call 620 621 static uint _unsafe_set_memory_ctr; // Slow-path includes alignment checks 622 623 static uint _new_instance_ctr; // 'new' object requires GC 624 static uint _new_array_ctr; // 'new' array requires GC 625 static uint _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr; 626 static uint _find_handler_ctr; // find exception handler 627 static uint _rethrow_ctr; // rethrow exception 628 static uint _mon_enter_stub_ctr; // monitor enter stub 629 static uint _mon_exit_stub_ctr; // monitor exit stub 630 static uint _mon_enter_ctr; // monitor enter slow 631 static uint _mon_exit_ctr; // monitor exit slow 632 static uint _partial_subtype_ctr; // SubRoutines::partial_subtype_check 633 634 // Statistics code 635 // stats for "normal" compiled calls (non-interface) 636 static int64_t _nof_normal_calls; // total # of calls 637 static int64_t _nof_inlined_calls; // total # of inlined normal calls 638 static int64_t _nof_static_calls; // total # of calls to static methods or super methods (invokespecial) 639 static int64_t _nof_inlined_static_calls; // total # of inlined static calls 640 // stats for compiled interface calls 641 static int64_t _nof_interface_calls; // total # of compiled calls 642 static int64_t _nof_inlined_interface_calls; // total # of inlined interface calls 643 644 public: // for compiler 645 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; } 646 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; } 647 static address nof_static_calls_addr() { return (address)&_nof_static_calls; } 648 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; } 649 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; } 650 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; } 651 static void print_call_statistics(uint64_t comp_total); 652 static void print_ic_miss_histogram(); 653 654 #endif // PRODUCT 655 656 static void print_statistics() PRODUCT_RETURN; 657 }; 658 659 660 // --------------------------------------------------------------------------- 661 // Implementation of AdapterHandlerLibrary 662 // 663 // This library manages argument marshaling adapters and native wrappers. 664 // There are 2 flavors of adapters: I2C and C2I. 665 // 666 // The I2C flavor takes a stock interpreted call setup, marshals the 667 // arguments for a Java-compiled call, and jumps to Rmethod-> code()-> 668 // code_begin(). It is broken to call it without an nmethod assigned. 669 // The usual behavior is to lift any register arguments up out of the 670 // stack and possibly re-pack the extra arguments to be contiguous. 671 // I2C adapters will save what the interpreter's stack pointer will be 672 // after arguments are popped, then adjust the interpreter's frame 673 // size to force alignment and possibly to repack the arguments. 674 // After re-packing, it jumps to the compiled code start. There are 675 // no safepoints in this adapter code and a GC cannot happen while 676 // marshaling is in progress. 677 // 678 // The C2I flavor takes a stock compiled call setup plus the target method in 679 // Rmethod, marshals the arguments for an interpreted call and jumps to 680 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been 681 // setup. Compiled frames are fixed-size and the args are likely not in the 682 // right place. Hence all the args will likely be copied into the 683 // interpreter's frame, forcing that frame to grow. The compiled frame's 684 // outgoing stack args will be dead after the copy. 685 // 686 // Native wrappers, like adapters, marshal arguments. Unlike adapters they 687 // also perform an official frame push & pop. They have a call to the native 688 // routine in their middles and end in a return (instead of ending in a jump). 689 // The native wrappers are stored in real nmethods instead of the BufferBlobs 690 // used by the adapters. The code generation happens here because it's very 691 // similar to what the adapters have to do. 692 693 class AdapterHandlerEntry : public CHeapObj<mtCode> { 694 friend class AdapterHandlerLibrary; 695 696 private: 697 AdapterFingerPrint* _fingerprint; 698 address _i2c_entry; 699 address _c2i_entry; 700 address _c2i_inline_entry; 701 address _c2i_inline_ro_entry; 702 address _c2i_unverified_entry; 703 address _c2i_unverified_inline_entry; 704 address _c2i_no_clinit_check_entry; 705 706 // Support for scalarized inline type calling convention 707 const GrowableArray<SigEntry>* _sig_cc; 708 709 #ifdef ASSERT 710 // Captures code and signature used to generate this adapter when 711 // verifying adapter equivalence. 712 unsigned char* _saved_code; 713 int _saved_code_length; 714 #endif 715 716 AdapterHandlerEntry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, 717 address c2i_inline_entry, address c2i_inline_ro_entry, 718 address c2i_unverified_entry, address c2i_unverified_inline_entry, 719 address c2i_no_clinit_check_entry) : 720 _fingerprint(fingerprint), 721 _i2c_entry(i2c_entry), 722 _c2i_entry(c2i_entry), 723 _c2i_inline_entry(c2i_inline_entry), 724 _c2i_inline_ro_entry(c2i_inline_ro_entry), 725 _c2i_unverified_entry(c2i_unverified_entry), 726 _c2i_unverified_inline_entry(c2i_unverified_inline_entry), 727 _c2i_no_clinit_check_entry(c2i_no_clinit_check_entry), 728 _sig_cc(nullptr) 729 #ifdef ASSERT 730 , _saved_code_length(0) 731 #endif 732 { } 733 734 ~AdapterHandlerEntry(); 735 736 public: 737 address get_i2c_entry() const { return _i2c_entry; } 738 address get_c2i_entry() const { return _c2i_entry; } 739 address get_c2i_inline_entry() const { return _c2i_inline_entry; } 740 address get_c2i_inline_ro_entry() const { return _c2i_inline_ro_entry; } 741 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; } 742 address get_c2i_unverified_inline_entry() const { return _c2i_unverified_inline_entry; } 743 address get_c2i_no_clinit_check_entry() const { return _c2i_no_clinit_check_entry; } 744 745 address base_address(); 746 void relocate(address new_base); 747 748 // Support for scalarized inline type calling convention 749 void set_sig_cc(const GrowableArray<SigEntry>* sig) { _sig_cc = sig; } 750 const GrowableArray<SigEntry>* get_sig_cc() const { return _sig_cc; } 751 752 AdapterFingerPrint* fingerprint() const { return _fingerprint; } 753 754 #ifdef ASSERT 755 // Used to verify that code generated for shared adapters is equivalent 756 void save_code (unsigned char* code, int length); 757 bool compare_code(AdapterHandlerEntry* other); 758 #endif 759 760 //virtual void print_on(outputStream* st) const; DO NOT USE 761 void print_adapter_on(outputStream* st) const; 762 }; 763 764 class CompiledEntrySignature; 765 766 class AdapterHandlerLibrary: public AllStatic { 767 friend class SharedRuntime; 768 private: 769 static BufferBlob* _buffer; // the temporary code buffer in CodeCache 770 static AdapterHandlerEntry* _abstract_method_handler; 771 static AdapterHandlerEntry* _no_arg_handler; 772 static AdapterHandlerEntry* _int_arg_handler; 773 static AdapterHandlerEntry* _obj_arg_handler; 774 static AdapterHandlerEntry* _obj_int_arg_handler; 775 static AdapterHandlerEntry* _obj_obj_arg_handler; 776 777 static BufferBlob* buffer_blob(); 778 static void initialize(); 779 static AdapterHandlerEntry* create_adapter(AdapterBlob*& new_adapter, 780 CompiledEntrySignature& ces, 781 bool allocate_code_blob); 782 static AdapterHandlerEntry* get_simple_adapter(const methodHandle& method); 783 public: 784 785 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, 786 address i2c_entry, address c2i_entry, address c2i_inline_entry, address c2i_inline_ro_entry, 787 address c2i_unverified_entry, address c2i_unverified_inline_entry, address c2i_no_clinit_check_entry = nullptr); 788 static void create_native_wrapper(const methodHandle& method); 789 static AdapterHandlerEntry* get_adapter(const methodHandle& method); 790 791 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); } 792 static void print_handler_on(outputStream* st, const CodeBlob* b); 793 static bool contains(const CodeBlob* b); 794 #ifndef PRODUCT 795 static void print_statistics(); 796 #endif // PRODUCT 797 798 }; 799 800 // Utility class for computing the calling convention of the 3 types 801 // of compiled method entries: 802 // Method::_from_compiled_entry - sig_cc 803 // Method::_from_compiled_inline_ro_entry - sig_cc_ro 804 // Method::_from_compiled_inline_entry - sig 805 class CompiledEntrySignature : public StackObj { 806 Method* _method; 807 int _num_inline_args; 808 bool _has_inline_recv; 809 GrowableArray<SigEntry>* _sig; 810 GrowableArray<SigEntry>* _sig_cc; 811 GrowableArray<SigEntry>* _sig_cc_ro; 812 VMRegPair* _regs; 813 VMRegPair* _regs_cc; 814 VMRegPair* _regs_cc_ro; 815 816 int _args_on_stack; 817 int _args_on_stack_cc; 818 int _args_on_stack_cc_ro; 819 820 bool _c1_needs_stack_repair; 821 bool _c2_needs_stack_repair; 822 823 GrowableArray<Method*>* _supers; 824 825 public: 826 Method* method() const { return _method; } 827 828 // Used by Method::_from_compiled_inline_entry 829 GrowableArray<SigEntry>* sig() const { return _sig; } 830 831 // Used by Method::_from_compiled_entry 832 GrowableArray<SigEntry>* sig_cc() const { return _sig_cc; } 833 834 // Used by Method::_from_compiled_inline_ro_entry 835 GrowableArray<SigEntry>* sig_cc_ro() const { return _sig_cc_ro; } 836 837 VMRegPair* regs() const { return _regs; } 838 VMRegPair* regs_cc() const { return _regs_cc; } 839 VMRegPair* regs_cc_ro() const { return _regs_cc_ro; } 840 841 int args_on_stack() const { return _args_on_stack; } 842 int args_on_stack_cc() const { return _args_on_stack_cc; } 843 int args_on_stack_cc_ro() const { return _args_on_stack_cc_ro; } 844 845 int num_inline_args() const { return _num_inline_args; } 846 bool has_inline_recv() const { return _has_inline_recv; } 847 848 bool has_scalarized_args() const { return _sig != _sig_cc; } 849 bool c1_needs_stack_repair() const { return _c1_needs_stack_repair; } 850 bool c2_needs_stack_repair() const { return _c2_needs_stack_repair; } 851 CodeOffsets::Entries c1_inline_ro_entry_type() const; 852 853 GrowableArray<Method*>* get_supers(); 854 855 CompiledEntrySignature(Method* method = nullptr); 856 void compute_calling_conventions(bool init = true); 857 }; 858 859 #endif // SHARE_RUNTIME_SHAREDRUNTIME_HPP