1 /* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP 26 #define SHARE_VM_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 "utilities/hashtable.hpp" 34 #include "utilities/macros.hpp" 35 36 class AdapterHandlerEntry; 37 class AdapterHandlerTable; 38 class AdapterFingerPrint; 39 class vframeStream; 40 41 // Runtime is the base class for various runtime interfaces 42 // (InterpreterRuntime, CompilerRuntime, etc.). It provides 43 // shared functionality such as exception forwarding (C++ to 44 // Java exceptions), locking/unlocking mechanisms, statistical 45 // information, etc. 46 47 class SharedRuntime: AllStatic { 48 friend class VMStructs; 49 50 private: 51 static methodHandle resolve_sub_helper(JavaThread *thread, 52 bool is_virtual, 53 bool is_optimized, TRAPS); 54 55 // Shared stub locations 56 57 static RuntimeStub* _wrong_method_blob; 58 static RuntimeStub* _wrong_method_abstract_blob; 59 static RuntimeStub* _ic_miss_blob; 60 static RuntimeStub* _resolve_opt_virtual_call_blob; 61 static RuntimeStub* _resolve_virtual_call_blob; 62 static RuntimeStub* _resolve_static_call_blob; 63 64 static DeoptimizationBlob* _deopt_blob; 65 66 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob; 67 static SafepointBlob* _polling_page_safepoint_handler_blob; 68 static SafepointBlob* _polling_page_return_handler_blob; 69 70 #ifdef COMPILER2 71 static UncommonTrapBlob* _uncommon_trap_blob; 72 #endif // COMPILER2 73 74 #ifndef PRODUCT 75 // Counters 76 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable) 77 #endif // !PRODUCT 78 79 private: 80 enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP }; 81 static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type); 82 static RuntimeStub* generate_resolve_blob(address destination, const char* name); 83 84 public: 85 static void generate_stubs(void); 86 87 // max bytes for each dtrace string parameter 88 enum { max_dtrace_string_size = 256 }; 89 90 // The following arithmetic routines are used on platforms that do 91 // not have machine instructions to implement their functionality. 92 // Do not remove these. 93 94 // long arithmetics 95 static jlong lmul(jlong y, jlong x); 96 static jlong ldiv(jlong y, jlong x); 97 static jlong lrem(jlong y, jlong x); 98 99 // float and double remainder 100 static jfloat frem(jfloat x, jfloat y); 101 static jdouble drem(jdouble x, jdouble y); 102 103 #ifdef __SOFTFP__ 104 static jfloat fadd(jfloat x, jfloat y); 105 static jfloat fsub(jfloat x, jfloat y); 106 static jfloat fmul(jfloat x, jfloat y); 107 static jfloat fdiv(jfloat x, jfloat y); 108 109 static jdouble dadd(jdouble x, jdouble y); 110 static jdouble dsub(jdouble x, jdouble y); 111 static jdouble dmul(jdouble x, jdouble y); 112 static jdouble ddiv(jdouble x, jdouble y); 113 #endif // __SOFTFP__ 114 115 // float conversion (needs to set appropriate rounding mode) 116 static jint f2i (jfloat x); 117 static jlong f2l (jfloat x); 118 static jint d2i (jdouble x); 119 static jlong d2l (jdouble x); 120 static jfloat d2f (jdouble x); 121 static jfloat l2f (jlong x); 122 static jdouble l2d (jlong x); 123 124 #ifdef __SOFTFP__ 125 static jfloat i2f (jint x); 126 static jdouble i2d (jint x); 127 static jdouble f2d (jfloat x); 128 #endif // __SOFTFP__ 129 130 // double trigonometrics and transcendentals 131 static jdouble dsin(jdouble x); 132 static jdouble dcos(jdouble x); 133 static jdouble dtan(jdouble x); 134 static jdouble dlog(jdouble x); 135 static jdouble dlog10(jdouble x); 136 static jdouble dexp(jdouble x); 137 static jdouble dpow(jdouble x, jdouble y); 138 139 #if defined(__SOFTFP__) || defined(E500V2) 140 static double dabs(double f); 141 #endif 142 143 #if defined(__SOFTFP__) || defined(PPC32) 144 static double dsqrt(double f); 145 #endif 146 147 // Montgomery multiplication 148 static void montgomery_multiply(jint *a_ints, jint *b_ints, jint *n_ints, 149 jint len, jlong inv, jint *m_ints); 150 static void montgomery_square(jint *a_ints, jint *n_ints, 151 jint len, jlong inv, jint *m_ints); 152 153 #ifdef __SOFTFP__ 154 // C++ compiler generates soft float instructions as well as passing 155 // float and double in registers. 156 static int fcmpl(float x, float y); 157 static int fcmpg(float x, float y); 158 static int dcmpl(double x, double y); 159 static int dcmpg(double x, double y); 160 161 static int unordered_fcmplt(float x, float y); 162 static int unordered_dcmplt(double x, double y); 163 static int unordered_fcmple(float x, float y); 164 static int unordered_dcmple(double x, double y); 165 static int unordered_fcmpge(float x, float y); 166 static int unordered_dcmpge(double x, double y); 167 static int unordered_fcmpgt(float x, float y); 168 static int unordered_dcmpgt(double x, double y); 169 170 static float fneg(float f); 171 static double dneg(double f); 172 #endif 173 174 // exception handling across interpreter/compiler boundaries 175 static address raw_exception_handler_for_return_address(JavaThread* thread, address return_address); 176 static address exception_handler_for_return_address(JavaThread* thread, address return_address); 177 178 #if INCLUDE_ALL_GCS 179 // G1 write barriers 180 static void g1_wb_pre(oopDesc* orig, JavaThread *thread); 181 static void g1_wb_post(void* card_addr, JavaThread* thread); 182 #endif // INCLUDE_ALL_GCS 183 184 // exception handling and implicit exceptions 185 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, 186 bool force_unwind, bool top_frame_only); 187 enum ImplicitExceptionKind { 188 IMPLICIT_NULL, 189 IMPLICIT_DIVIDE_BY_ZERO, 190 STACK_OVERFLOW 191 }; 192 static void throw_AbstractMethodError(JavaThread* thread); 193 static void throw_IncompatibleClassChangeError(JavaThread* thread); 194 static void throw_ArithmeticException(JavaThread* thread); 195 static void throw_NullPointerException(JavaThread* thread); 196 static void throw_NullPointerException_at_call(JavaThread* thread); 197 static void throw_StackOverflowError(JavaThread* thread); 198 static address continuation_for_implicit_exception(JavaThread* thread, 199 address faulting_pc, 200 ImplicitExceptionKind exception_kind); 201 #if INCLUDE_JVMCI 202 static address deoptimize_for_implicit_exception(JavaThread* thread, address pc, nmethod* nm, int deopt_reason); 203 #endif 204 205 // Shared stub locations 206 static address get_poll_stub(address pc); 207 208 static address get_ic_miss_stub() { 209 assert(_ic_miss_blob!= NULL, "oops"); 210 return _ic_miss_blob->entry_point(); 211 } 212 213 static address get_handle_wrong_method_stub() { 214 assert(_wrong_method_blob!= NULL, "oops"); 215 return _wrong_method_blob->entry_point(); 216 } 217 218 static address get_handle_wrong_method_abstract_stub() { 219 assert(_wrong_method_abstract_blob!= NULL, "oops"); 220 return _wrong_method_abstract_blob->entry_point(); 221 } 222 223 #ifdef COMPILER2 224 static void generate_uncommon_trap_blob(void); 225 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; } 226 #endif // COMPILER2 227 228 static address get_resolve_opt_virtual_call_stub() { 229 assert(_resolve_opt_virtual_call_blob != NULL, "oops"); 230 return _resolve_opt_virtual_call_blob->entry_point(); 231 } 232 static address get_resolve_virtual_call_stub() { 233 assert(_resolve_virtual_call_blob != NULL, "oops"); 234 return _resolve_virtual_call_blob->entry_point(); 235 } 236 static address get_resolve_static_call_stub() { 237 assert(_resolve_static_call_blob != NULL, "oops"); 238 return _resolve_static_call_blob->entry_point(); 239 } 240 241 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; } 242 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; } 243 static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; } 244 245 // Counters 246 #ifndef PRODUCT 247 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; } 248 #endif // PRODUCT 249 250 // Helper routine for full-speed JVMTI exception throwing support 251 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception); 252 static void throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message = NULL); 253 254 // RedefineClasses() tracing support for obsolete method entry 255 static int rc_trace_method_entry(JavaThread* thread, Method* m); 256 257 // To be used as the entry point for unresolved native methods. 258 static address native_method_throw_unsatisfied_link_error_entry(); 259 static address native_method_throw_unsupported_operation_exception_entry(); 260 261 // bytecode tracing is only used by the TraceBytecodes 262 static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0; 263 264 static oop retrieve_receiver(Symbol* sig, frame caller); 265 266 static void register_finalizer(JavaThread* thread, oopDesc* obj); 267 268 // dtrace notifications 269 static int dtrace_object_alloc(oopDesc* o, int size); 270 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o, int size); 271 static int dtrace_method_entry(JavaThread* thread, Method* m); 272 static int dtrace_method_exit(JavaThread* thread, Method* m); 273 274 // Utility method for retrieving the Java thread id, returns 0 if the 275 // thread is not a well formed Java thread. 276 static jlong get_java_tid(Thread* thread); 277 278 279 // used by native wrappers to reenable yellow if overflow happened in native code 280 static void reguard_yellow_pages(); 281 282 // Fill in the "X cannot be cast to a Y" message for ClassCastException 283 // 284 // @param thr the current thread 285 // @param name the name of the class of the object attempted to be cast 286 // @return the dynamically allocated exception message (must be freed 287 // by the caller using a resource mark) 288 // 289 // BCP must refer to the current 'checkcast' opcode for the frame 290 // on top of the stack. 291 // The caller (or one of it's callers) must use a ResourceMark 292 // in order to correctly free the result. 293 // 294 static char* generate_class_cast_message(JavaThread* thr, const char* name); 295 296 // Fill in the "X cannot be cast to a Y" message for ClassCastException 297 // 298 // @param name the name of the class of the object attempted to be cast 299 // @param klass the name of the target klass attempt 300 // @param gripe the specific kind of problem being reported 301 // @return the dynamically allocated exception message (must be freed 302 // by the caller using a resource mark) 303 // 304 // This version does not require access the frame, so it can be called 305 // from interpreted code 306 // The caller (or one of it's callers) must use a ResourceMark 307 // in order to correctly free the result. 308 // 309 static char* generate_class_cast_message(const char* name, const char* klass, 310 const char* gripe = " cannot be cast to "); 311 312 // Resolves a call site- may patch in the destination of the call into the 313 // compiled code. 314 static methodHandle resolve_helper(JavaThread *thread, 315 bool is_virtual, 316 bool is_optimized, TRAPS); 317 318 private: 319 // deopt blob 320 static void generate_deopt_blob(void); 321 322 public: 323 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; } 324 325 // Resets a call-site in compiled code so it will get resolved again. 326 static methodHandle reresolve_call_site(JavaThread *thread, TRAPS); 327 328 // In the code prolog, if the klass comparison fails, the inline cache 329 // misses and the call site is patched to megamorphic 330 static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS); 331 332 // Find the method that called us. 333 static methodHandle find_callee_method(JavaThread* thread, TRAPS); 334 335 336 private: 337 static Handle find_callee_info(JavaThread* thread, 338 Bytecodes::Code& bc, 339 CallInfo& callinfo, TRAPS); 340 static Handle find_callee_info_helper(JavaThread* thread, 341 vframeStream& vfst, 342 Bytecodes::Code& bc, 343 CallInfo& callinfo, TRAPS); 344 345 static address clean_virtual_call_entry(); 346 static address clean_opt_virtual_call_entry(); 347 static address clean_static_call_entry(); 348 349 public: 350 351 // Read the array of BasicTypes from a Java signature, and compute where 352 // compiled Java code would like to put the results. Values in reg_lo and 353 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are 354 // registers, those above refer to 4-byte stack slots. All stack slots are 355 // based off of the window top. SharedInfo::stack0 refers to the first usable 356 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word 357 // 4-bytes higher. So for sparc because the register window save area is at 358 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0 359 // will be just above it. ( 360 // return value is the maximum number of VMReg stack slots the convention will use. 361 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed, int is_outgoing); 362 363 static void check_member_name_argument_is_last_argument(const methodHandle& method, 364 const BasicType* sig_bt, 365 const VMRegPair* regs) NOT_DEBUG_RETURN; 366 367 // Ditto except for calling C 368 // 369 // C argument in register AND stack slot. 370 // Some architectures require that an argument must be passed in a register 371 // AND in a stack slot. These architectures provide a second VMRegPair array 372 // to be filled by the c_calling_convention method. On other architectures, 373 // NULL is being passed as the second VMRegPair array, so arguments are either 374 // passed in a register OR in a stack slot. 375 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2, 376 int total_args_passed); 377 378 // Compute the new number of arguments in the signature if 32 bit ints 379 // must be converted to longs. Needed if CCallingConventionRequiresIntsAsLongs 380 // is true. 381 static int convert_ints_to_longints_argcnt(int in_args_count, BasicType* in_sig_bt); 382 // Adapt a method's signature if it contains 32 bit integers that must 383 // be converted to longs. Needed if CCallingConventionRequiresIntsAsLongs 384 // is true. 385 static void convert_ints_to_longints(int i2l_argcnt, int& in_args_count, 386 BasicType*& in_sig_bt, VMRegPair*& in_regs); 387 388 // Generate I2C and C2I adapters. These adapters are simple argument marshalling 389 // blobs. Unlike adapters in the tiger and earlier releases the code in these 390 // blobs does not create a new frame and are therefore virtually invisible 391 // to the stack walking code. In general these blobs extend the callers stack 392 // as needed for the conversion of argument locations. 393 394 // When calling a c2i blob the code will always call the interpreter even if 395 // by the time we reach the blob there is compiled code available. This allows 396 // the blob to pass the incoming stack pointer (the sender sp) in a known 397 // location for the interpreter to record. This is used by the frame code 398 // to correct the sender code to match up with the stack pointer when the 399 // thread left the compiled code. In addition it allows the interpreter 400 // to remove the space the c2i adapter allocated to do its argument conversion. 401 402 // Although a c2i blob will always run interpreted even if compiled code is 403 // present if we see that compiled code is present the compiled call site 404 // will be patched/re-resolved so that later calls will run compiled. 405 406 // Additionally a c2i blob need to have a unverified entry because it can be reached 407 // in situations where the call site is an inlined cache site and may go megamorphic. 408 409 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed 410 // that the interpreter before it does any call dispatch will record the current 411 // stack pointer in the interpreter frame. On return it will restore the stack 412 // pointer as needed. This means the i2c adapter code doesn't need any special 413 // handshaking path with compiled code to keep the stack walking correct. 414 415 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm, 416 int total_args_passed, 417 int max_arg, 418 const BasicType *sig_bt, 419 const VMRegPair *regs, 420 AdapterFingerPrint* fingerprint); 421 422 static void gen_i2c_adapter(MacroAssembler *_masm, 423 int total_args_passed, 424 int comp_args_on_stack, 425 const BasicType *sig_bt, 426 const VMRegPair *regs); 427 428 // OSR support 429 430 // OSR_migration_begin will extract the jvm state from an interpreter 431 // frame (locals, monitors) and store the data in a piece of C heap 432 // storage. This then allows the interpreter frame to be removed from the 433 // stack and the OSR nmethod to be called. That method is called with a 434 // pointer to the C heap storage. This pointer is the return value from 435 // OSR_migration_begin. 436 437 static intptr_t* OSR_migration_begin(JavaThread *thread); 438 439 // OSR_migration_end is a trivial routine. It is called after the compiled 440 // method has extracted the jvm state from the C heap that OSR_migration_begin 441 // created. It's entire job is to simply free this storage. 442 static void OSR_migration_end(intptr_t* buf); 443 444 // Convert a sig into a calling convention register layout 445 // and find interesting things about it. 446 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size); 447 static VMReg name_for_receiver(); 448 449 // "Top of Stack" slots that may be unused by the calling convention but must 450 // otherwise be preserved. 451 // On Intel these are not necessary and the value can be zero. 452 // On Sparc this describes the words reserved for storing a register window 453 // when an interrupt occurs. 454 static uint out_preserve_stack_slots(); 455 456 // Is vector's size (in bytes) bigger than a size saved by default? 457 // For example, on x86 16 bytes XMM registers are saved by default. 458 static bool is_wide_vector(int size); 459 460 // Save and restore a native result 461 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots); 462 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots); 463 464 // Generate a native wrapper for a given method. The method takes arguments 465 // in the Java compiled code convention, marshals them to the native 466 // convention (handlizes oops, etc), transitions to native, makes the call, 467 // returns to java state (possibly blocking), unhandlizes any result and 468 // returns. 469 // 470 // The wrapper may contain special-case code if the given method 471 // is a JNI critical method, or a compiled method handle adapter, 472 // such as _invokeBasic, _linkToVirtual, etc. 473 static nmethod* generate_native_wrapper(MacroAssembler* masm, 474 const methodHandle& method, 475 int compile_id, 476 BasicType* sig_bt, 477 VMRegPair* regs, 478 BasicType ret_type); 479 480 // Block before entering a JNI critical method 481 static void block_for_jni_critical(JavaThread* thread); 482 483 // A compiled caller has just called the interpreter, but compiled code 484 // exists. Patch the caller so he no longer calls into the interpreter. 485 static void fixup_callers_callsite(Method* moop, address ret_pc); 486 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb); 487 488 // Slow-path Locking and Unlocking 489 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread); 490 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread); 491 492 // Resolving of calls 493 static address resolve_static_call_C (JavaThread *thread); 494 static address resolve_virtual_call_C (JavaThread *thread); 495 static address resolve_opt_virtual_call_C(JavaThread *thread); 496 497 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.) 498 static void slow_arraycopy_C(oopDesc* src, jint src_pos, 499 oopDesc* dest, jint dest_pos, 500 jint length, JavaThread* thread); 501 502 // handle ic miss with caller being compiled code 503 // wrong method handling (inline cache misses, zombie methods) 504 static address handle_wrong_method(JavaThread* thread); 505 static address handle_wrong_method_abstract(JavaThread* thread); 506 static address handle_wrong_method_ic_miss(JavaThread* thread); 507 508 #ifndef PRODUCT 509 510 // Collect and print inline cache miss statistics 511 private: 512 enum { maxICmiss_count = 100 }; 513 static int _ICmiss_index; // length of IC miss histogram 514 static int _ICmiss_count[maxICmiss_count]; // miss counts 515 static address _ICmiss_at[maxICmiss_count]; // miss addresses 516 static void trace_ic_miss(address at); 517 518 public: 519 static int _throw_null_ctr; // throwing a null-pointer exception 520 static int _ic_miss_ctr; // total # of IC misses 521 static int _wrong_method_ctr; 522 static int _resolve_static_ctr; 523 static int _resolve_virtual_ctr; 524 static int _resolve_opt_virtual_ctr; 525 static int _implicit_null_throws; 526 static int _implicit_div0_throws; 527 528 static int _jbyte_array_copy_ctr; // Slow-path byte array copy 529 static int _jshort_array_copy_ctr; // Slow-path short array copy 530 static int _jint_array_copy_ctr; // Slow-path int array copy 531 static int _jlong_array_copy_ctr; // Slow-path long array copy 532 static int _oop_array_copy_ctr; // Slow-path oop array copy 533 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast 534 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks 535 static int _generic_array_copy_ctr; // Slow-path includes type decoding 536 static int _slow_array_copy_ctr; // Slow-path failed out to a method call 537 538 static int _new_instance_ctr; // 'new' object requires GC 539 static int _new_array_ctr; // 'new' array requires GC 540 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr; 541 static int _find_handler_ctr; // find exception handler 542 static int _rethrow_ctr; // rethrow exception 543 static int _mon_enter_stub_ctr; // monitor enter stub 544 static int _mon_exit_stub_ctr; // monitor exit stub 545 static int _mon_enter_ctr; // monitor enter slow 546 static int _mon_exit_ctr; // monitor exit slow 547 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check 548 549 // Statistics code 550 // stats for "normal" compiled calls (non-interface) 551 static int _nof_normal_calls; // total # of calls 552 static int _nof_optimized_calls; // total # of statically-bound calls 553 static int _nof_inlined_calls; // total # of inlined normal calls 554 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial) 555 static int _nof_inlined_static_calls; // total # of inlined static calls 556 // stats for compiled interface calls 557 static int _nof_interface_calls; // total # of compiled calls 558 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls 559 static int _nof_inlined_interface_calls; // total # of inlined interface calls 560 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls 561 // stats for runtime exceptions 562 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining 563 564 public: // for compiler 565 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; } 566 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; } 567 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; } 568 static address nof_static_calls_addr() { return (address)&_nof_static_calls; } 569 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; } 570 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; } 571 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; } 572 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; } 573 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; } 574 static void print_call_statistics(int comp_total); 575 static void print_statistics(); 576 static void print_ic_miss_histogram(); 577 578 #endif // PRODUCT 579 }; 580 581 582 // --------------------------------------------------------------------------- 583 // Implementation of AdapterHandlerLibrary 584 // 585 // This library manages argument marshaling adapters and native wrappers. 586 // There are 2 flavors of adapters: I2C and C2I. 587 // 588 // The I2C flavor takes a stock interpreted call setup, marshals the 589 // arguments for a Java-compiled call, and jumps to Rmethod-> code()-> 590 // code_begin(). It is broken to call it without an nmethod assigned. 591 // The usual behavior is to lift any register arguments up out of the 592 // stack and possibly re-pack the extra arguments to be contiguous. 593 // I2C adapters will save what the interpreter's stack pointer will be 594 // after arguments are popped, then adjust the interpreter's frame 595 // size to force alignment and possibly to repack the arguments. 596 // After re-packing, it jumps to the compiled code start. There are 597 // no safepoints in this adapter code and a GC cannot happen while 598 // marshaling is in progress. 599 // 600 // The C2I flavor takes a stock compiled call setup plus the target method in 601 // Rmethod, marshals the arguments for an interpreted call and jumps to 602 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been 603 // setup. Compiled frames are fixed-size and the args are likely not in the 604 // right place. Hence all the args will likely be copied into the 605 // interpreter's frame, forcing that frame to grow. The compiled frame's 606 // outgoing stack args will be dead after the copy. 607 // 608 // Native wrappers, like adapters, marshal arguments. Unlike adapters they 609 // also perform an official frame push & pop. They have a call to the native 610 // routine in their middles and end in a return (instead of ending in a jump). 611 // The native wrappers are stored in real nmethods instead of the BufferBlobs 612 // used by the adapters. The code generation happens here because it's very 613 // similar to what the adapters have to do. 614 615 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> { 616 friend class AdapterHandlerTable; 617 618 private: 619 AdapterFingerPrint* _fingerprint; 620 address _i2c_entry; 621 address _c2i_entry; 622 address _c2i_unverified_entry; 623 624 #ifdef ASSERT 625 // Captures code and signature used to generate this adapter when 626 // verifying adapter equivalence. 627 unsigned char* _saved_code; 628 int _saved_code_length; 629 #endif 630 631 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { 632 _fingerprint = fingerprint; 633 _i2c_entry = i2c_entry; 634 _c2i_entry = c2i_entry; 635 _c2i_unverified_entry = c2i_unverified_entry; 636 #ifdef ASSERT 637 _saved_code = NULL; 638 _saved_code_length = 0; 639 #endif 640 } 641 642 void deallocate(); 643 644 // should never be used 645 AdapterHandlerEntry(); 646 647 public: 648 address get_i2c_entry() const { return _i2c_entry; } 649 address get_c2i_entry() const { return _c2i_entry; } 650 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; } 651 address base_address(); 652 void relocate(address new_base); 653 654 AdapterFingerPrint* fingerprint() const { return _fingerprint; } 655 656 AdapterHandlerEntry* next() { 657 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next(); 658 } 659 660 #ifdef ASSERT 661 // Used to verify that code generated for shared adapters is equivalent 662 void save_code (unsigned char* code, int length); 663 bool compare_code(unsigned char* code, int length); 664 #endif 665 666 //virtual void print_on(outputStream* st) const; DO NOT USE 667 void print_adapter_on(outputStream* st) const; 668 }; 669 670 class AdapterHandlerLibrary: public AllStatic { 671 private: 672 static BufferBlob* _buffer; // the temporary code buffer in CodeCache 673 static AdapterHandlerTable* _adapters; 674 static AdapterHandlerEntry* _abstract_method_handler; 675 static BufferBlob* buffer_blob(); 676 static void initialize(); 677 678 public: 679 680 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, 681 address i2c_entry, address c2i_entry, address c2i_unverified_entry); 682 static void create_native_wrapper(const methodHandle& method); 683 static AdapterHandlerEntry* get_adapter(const methodHandle& method); 684 685 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); } 686 static void print_handler_on(outputStream* st, const CodeBlob* b); 687 static bool contains(const CodeBlob* b); 688 #ifndef PRODUCT 689 static void print_statistics(); 690 #endif // PRODUCT 691 692 }; 693 694 #endif // SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP