sharedRuntime.hpp revision 9737:e286c9ccd58d
171088Sjasone/* 271088Sjasone * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 371088Sjasone * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 471088Sjasone * 571088Sjasone * This code is free software; you can redistribute it and/or modify it 671088Sjasone * under the terms of the GNU General Public License version 2 only, as 771088Sjasone * published by the Free Software Foundation. 871088Sjasone * 971088Sjasone * This code is distributed in the hope that it will be useful, but WITHOUT 1071088Sjasone * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1171088Sjasone * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1271088Sjasone * version 2 for more details (a copy is included in the LICENSE file that 1371088Sjasone * accompanied this code). 1471088Sjasone * 1571088Sjasone * You should have received a copy of the GNU General Public License version 1671088Sjasone * 2 along with this work; if not, write to the Free Software Foundation, 1771088Sjasone * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1871088Sjasone * 1971088Sjasone * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2071088Sjasone * or visit www.oracle.com if you need additional information or have any 2171088Sjasone * questions. 2271088Sjasone * 2371088Sjasone */ 2471088Sjasone 2571088Sjasone#ifndef SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP 2671088Sjasone#define SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP 27116182Sobrien 28116182Sobrien#include "interpreter/bytecodeHistogram.hpp" 29116182Sobrien#include "interpreter/bytecodeTracer.hpp" 3071088Sjasone#include "interpreter/linkResolver.hpp" 3171088Sjasone#include "memory/allocation.hpp" 3271088Sjasone#include "memory/resourceArea.hpp" 3371088Sjasone#include "utilities/hashtable.hpp" 3476166Smarkm#include "utilities/macros.hpp" 3576166Smarkm 3671088Sjasoneclass AdapterHandlerEntry; 3771088Sjasoneclass AdapterHandlerTable; 3871088Sjasoneclass AdapterFingerPrint; 3971088Sjasoneclass vframeStream; 40109862Sjeff 4171088Sjasone// Runtime is the base class for various runtime interfaces 42126326Sjhb// (InterpreterRuntime, CompilerRuntime, etc.). It provides 4371088Sjasone// shared functionality such as exception forwarding (C++ to 4471088Sjasone// Java exceptions), locking/unlocking mechanisms, statistical 4571088Sjasone// information, etc. 4671088Sjasone 4771088Sjasoneclass SharedRuntime: AllStatic { 4871088Sjasone friend class VMStructs; 4971088Sjasone 5071088Sjasone private: 5171088Sjasone static methodHandle resolve_sub_helper(JavaThread *thread, 5283366Sjulian bool is_virtual, 5387594Sobrien bool is_optimized, TRAPS); 54103216Sjulian 5587594Sobrien // Shared stub locations 5687594Sobrien 5771088Sjasone static RuntimeStub* _wrong_method_blob; 5871088Sjasone static RuntimeStub* _wrong_method_abstract_blob; 5971088Sjasone static RuntimeStub* _ic_miss_blob; 6071088Sjasone static RuntimeStub* _resolve_opt_virtual_call_blob; 6171088Sjasone static RuntimeStub* _resolve_virtual_call_blob; 6271088Sjasone static RuntimeStub* _resolve_static_call_blob; 6371088Sjasone 6471088Sjasone static DeoptimizationBlob* _deopt_blob; 6571088Sjasone 6671088Sjasone static SafepointBlob* _polling_page_vectors_safepoint_handler_blob; 6771088Sjasone static SafepointBlob* _polling_page_safepoint_handler_blob; 6871088Sjasone static SafepointBlob* _polling_page_return_handler_blob; 6971088Sjasone 7071088Sjasone#ifdef COMPILER2 7171088Sjasone static UncommonTrapBlob* _uncommon_trap_blob; 7271088Sjasone#endif // COMPILER2 7371088Sjasone 7471088Sjasone#ifndef PRODUCT 7571088Sjasone // Counters 7671088Sjasone static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable) 77126326Sjhb#endif // !PRODUCT 78126326Sjhb 7971088Sjasone private: 80126326Sjhb enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP }; 81126326Sjhb static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type); 82126326Sjhb static RuntimeStub* generate_resolve_blob(address destination, const char* name); 83126326Sjhb 8471088Sjasone public: 8571088Sjasone static void generate_stubs(void); 8671088Sjasone 8783366Sjulian // max bytes for each dtrace string parameter 8871088Sjasone enum { max_dtrace_string_size = 256 }; 8983366Sjulian 9071088Sjasone // The following arithmetic routines are used on platforms that do 9171088Sjasone // not have machine instructions to implement their functionality. 9271088Sjasone // Do not remove these. 9371088Sjasone 9471088Sjasone // long arithmetics 9571088Sjasone static jlong lmul(jlong y, jlong x); 96126326Sjhb static jlong ldiv(jlong y, jlong x); 9783366Sjulian static jlong lrem(jlong y, jlong x); 9871088Sjasone 9971088Sjasone // float and double remainder 10083366Sjulian static jfloat frem(jfloat x, jfloat y); 10171088Sjasone static jdouble drem(jdouble x, jdouble y); 10297995Sjhb 10397995Sjhb 10471088Sjasone#ifdef _WIN64 10583366Sjulian // Workaround for fmod issue in the Windows x64 CRT 106111883Sjhb static double fmod_winx64(double x, double y); 107111883Sjhb#endif 10874912Sjhb 10971088Sjasone#ifdef __SOFTFP__ 110126326Sjhb static jfloat fadd(jfloat x, jfloat y); 11171088Sjasone static jfloat fsub(jfloat x, jfloat y); 112100209Sgallatin static jfloat fmul(jfloat x, jfloat y); 113100209Sgallatin static jfloat fdiv(jfloat x, jfloat y); 114100209Sgallatin 115100209Sgallatin static jdouble dadd(jdouble x, jdouble y); 11671088Sjasone static jdouble dsub(jdouble x, jdouble y); 11771088Sjasone static jdouble dmul(jdouble x, jdouble y); 11871088Sjasone static jdouble ddiv(jdouble x, jdouble y); 11995322Shsu#endif // __SOFTFP__ 120126326Sjhb 12195322Shsu // float conversion (needs to set appropriate rounding mode) 12288900Sjhb static jint f2i (jfloat x); 12388900Sjhb static jlong f2l (jfloat x); 12471088Sjasone static jint d2i (jdouble x); 125126326Sjhb static jlong d2l (jdouble x); 126126326Sjhb static jfloat d2f (jdouble x); 12771088Sjasone static jfloat l2f (jlong x); 12871088Sjasone static jdouble l2d (jlong x); 12997995Sjhb 13097995Sjhb#ifdef __SOFTFP__ 13171088Sjasone static jfloat i2f (jint x); 13271088Sjasone static jdouble i2d (jint x); 13372200Sbmilekic static jdouble f2d (jfloat x); 13474912Sjhb#endif // __SOFTFP__ 13571088Sjasone 13671088Sjasone // double trigonometrics and transcendentals 13771088Sjasone static jdouble dsin(jdouble x); 13871088Sjasone static jdouble dcos(jdouble x); 13983366Sjulian static jdouble dtan(jdouble x); 14071088Sjasone static jdouble dlog(jdouble x); 14171088Sjasone static jdouble dlog10(jdouble x); 14271088Sjasone static jdouble dexp(jdouble x); 14371088Sjasone static jdouble dpow(jdouble x, jdouble y); 14471088Sjasone 14571088Sjasone#if defined(__SOFTFP__) || defined(E500V2) 146126326Sjhb static double dabs(double f); 14783366Sjulian#endif 14883658Speter 149126326Sjhb#if defined(__SOFTFP__) || defined(PPC) 15071088Sjasone static double dsqrt(double f); 15171088Sjasone#endif 15283366Sjulian 15383650Sjhb // Montgomery multiplication 15471088Sjasone static void montgomery_multiply(jint *a_ints, jint *b_ints, jint *n_ints, 15571088Sjasone jint len, jlong inv, jint *m_ints); 15697995Sjhb static void montgomery_square(jint *a_ints, jint *n_ints, 15797995Sjhb jint len, jlong inv, jint *m_ints); 15871088Sjasone 15983366Sjulian#ifdef __SOFTFP__ 160111883Sjhb // C++ compiler generates soft float instructions as well as passing 161111883Sjhb // float and double in registers. 16274912Sjhb static int fcmpl(float x, float y); 16371088Sjasone static int fcmpg(float x, float y); 16471088Sjasone static int dcmpl(double x, double y); 16571088Sjasone static int dcmpg(double x, double y); 16671088Sjasone 16771088Sjasone static int unordered_fcmplt(float x, float y); 16871088Sjasone static int unordered_dcmplt(double x, double y); 16971088Sjasone static int unordered_fcmple(float x, float y); 17071088Sjasone static int unordered_dcmple(double x, double y); 17171088Sjasone static int unordered_fcmpge(float x, float y); 17271088Sjasone static int unordered_dcmpge(double x, double y); 17395322Shsu static int unordered_fcmpgt(float x, float y); 174126326Sjhb static int unordered_dcmpgt(double x, double y); 17595322Shsu 176126326Sjhb static float fneg(float f); 17771088Sjasone static double dneg(double f); 17888900Sjhb#endif 17988900Sjhb 18071088Sjasone // exception handling across interpreter/compiler boundaries 181126326Sjhb static address raw_exception_handler_for_return_address(JavaThread* thread, address return_address); 182126326Sjhb static address exception_handler_for_return_address(JavaThread* thread, address return_address); 183126326Sjhb 184126326Sjhb#if INCLUDE_ALL_GCS 185126326Sjhb // G1 write barriers 186126326Sjhb static void g1_wb_pre(oopDesc* orig, JavaThread *thread); 187126326Sjhb static void g1_wb_post(void* card_addr, JavaThread* thread); 188126326Sjhb#endif // INCLUDE_ALL_GCS 189126326Sjhb 19071088Sjasone // exception handling and implicit exceptions 191126326Sjhb static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, 19283650Sjhb bool force_unwind, bool top_frame_only); 19399072Sjulian enum ImplicitExceptionKind { 19499072Sjulian IMPLICIT_NULL, 195113625Sjhb IMPLICIT_DIVIDE_BY_ZERO, 19671088Sjasone STACK_OVERFLOW 19771088Sjasone }; 19897995Sjhb static void throw_AbstractMethodError(JavaThread* thread); 19997995Sjhb static void throw_IncompatibleClassChangeError(JavaThread* thread); 20071088Sjasone static void throw_ArithmeticException(JavaThread* thread); 20197995Sjhb static void throw_NullPointerException(JavaThread* thread); 20272200Sbmilekic static void throw_NullPointerException_at_call(JavaThread* thread); 20374912Sjhb static void throw_StackOverflowError(JavaThread* thread); 20471088Sjasone static void throw_delayed_StackOverflowError(JavaThread* thread); 20571088Sjasone static void throw_StackOverflowError_common(JavaThread* thread, bool delayed); 20671088Sjasone static address continuation_for_implicit_exception(JavaThread* thread, 20771088Sjasone address faulting_pc, 20871088Sjasone ImplicitExceptionKind exception_kind); 20971088Sjasone#if INCLUDE_JVMCI 21071088Sjasone static address deoptimize_for_implicit_exception(JavaThread* thread, address pc, nmethod* nm, int deopt_reason); 21171088Sjasone#endif 21271088Sjasone 21371088Sjasone static void enable_stack_reserved_zone(JavaThread* thread); 21471088Sjasone static frame look_for_reserved_stack_annotated_method(JavaThread* thread, frame fr); 21571088Sjasone 216126326Sjhb // Shared stub locations 21783366Sjulian static address get_poll_stub(address pc); 21871088Sjasone 21971088Sjasone static address get_ic_miss_stub() { 22071088Sjasone assert(_ic_miss_blob!= NULL, "oops"); 22183366Sjulian return _ic_miss_blob->entry_point(); 22271088Sjasone } 22371088Sjasone 22497995Sjhb static address get_handle_wrong_method_stub() { 22597995Sjhb assert(_wrong_method_blob!= NULL, "oops"); 22671088Sjasone return _wrong_method_blob->entry_point(); 22783366Sjulian } 228111883Sjhb 229111883Sjhb static address get_handle_wrong_method_abstract_stub() { 23074912Sjhb assert(_wrong_method_abstract_blob!= NULL, "oops"); 23171088Sjasone return _wrong_method_abstract_blob->entry_point(); 23271088Sjasone } 23371088Sjasone 23471088Sjasone#ifdef COMPILER2 23571088Sjasone static void generate_uncommon_trap_blob(void); 23683366Sjulian static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; } 23771088Sjasone#endif // COMPILER2 23871088Sjasone 23971088Sjasone static address get_resolve_opt_virtual_call_stub() { 24071088Sjasone assert(_resolve_opt_virtual_call_blob != NULL, "oops"); 24195322Shsu return _resolve_opt_virtual_call_blob->entry_point(); 242126326Sjhb } 24395322Shsu static address get_resolve_virtual_call_stub() { 24488900Sjhb assert(_resolve_virtual_call_blob != NULL, "oops"); 24588900Sjhb return _resolve_virtual_call_blob->entry_point(); 24671088Sjasone } 247126326Sjhb static address get_resolve_static_call_stub() { 248126885Sjhb assert(_resolve_static_call_blob != NULL, "oops"); 249126326Sjhb return _resolve_static_call_blob->entry_point(); 25071088Sjasone } 25171088Sjasone 25297995Sjhb static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; } 25397995Sjhb static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; } 25471088Sjasone static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; } 25571088Sjasone 25672200Sbmilekic // Counters 25774912Sjhb#ifndef PRODUCT 25871088Sjasone static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; } 25971088Sjasone#endif // PRODUCT 26071088Sjasone 26171088Sjasone // Helper routine for full-speed JVMTI exception throwing support 26271088Sjasone static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception); 26371088Sjasone static void throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message = NULL); 26483366Sjulian 26571088Sjasone // RedefineClasses() tracing support for obsolete method entry 26671088Sjasone static int rc_trace_method_entry(JavaThread* thread, Method* m); 26771088Sjasone 26871088Sjasone // To be used as the entry point for unresolved native methods. 26971088Sjasone static address native_method_throw_unsatisfied_link_error_entry(); 27071088Sjasone static address native_method_throw_unsupported_operation_exception_entry(); 271126326Sjhb 27283366Sjulian // bytecode tracing is only used by the TraceBytecodes 27383650Sjhb static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0; 27471088Sjasone 27571088Sjasone static oop retrieve_receiver(Symbol* sig, frame caller); 27671088Sjasone 27771088Sjasone static void register_finalizer(JavaThread* thread, oopDesc* obj); 27883366Sjulian 27983650Sjhb // dtrace notifications 28071088Sjasone static int dtrace_object_alloc(oopDesc* o, int size); 28171088Sjasone static int dtrace_object_alloc_base(Thread* thread, oopDesc* o, int size); 28297995Sjhb static int dtrace_method_entry(JavaThread* thread, Method* m); 28397995Sjhb static int dtrace_method_exit(JavaThread* thread, Method* m); 28471088Sjasone 28583366Sjulian // Utility method for retrieving the Java thread id, returns 0 if the 286111883Sjhb // thread is not a well formed Java thread. 287111883Sjhb static jlong get_java_tid(Thread* thread); 28874912Sjhb 28971088Sjasone 29071088Sjasone // used by native wrappers to reenable yellow if overflow happened in native code 29171088Sjasone static void reguard_yellow_pages(); 29271088Sjasone 29371088Sjasone // Fill in the "X cannot be cast to a Y" message for ClassCastException 29483366Sjulian // 29571088Sjasone // @param thr the current thread 29671088Sjasone // @param name the name of the class of the object attempted to be cast 29771088Sjasone // @return the dynamically allocated exception message (must be freed 29871088Sjasone // by the caller using a resource mark) 29995322Shsu // 300126326Sjhb // BCP must refer to the current 'checkcast' opcode for the frame 30195322Shsu // on top of the stack. 30288900Sjhb // The caller (or one of it's callers) must use a ResourceMark 30388900Sjhb // in order to correctly free the result. 30471088Sjasone // 305126326Sjhb static char* generate_class_cast_message(JavaThread* thr, const char* name); 306126885Sjhb 307126326Sjhb // Fill in the "X cannot be cast to a Y" message for ClassCastException 308126326Sjhb // 309126326Sjhb // @param name the name of the class of the object attempted to be cast 310126326Sjhb // @param klass the name of the target klass attempt 311126326Sjhb // @param gripe the specific kind of problem being reported 312126326Sjhb // @return the dynamically allocated exception message (must be freed 313126326Sjhb // by the caller using a resource mark) 314126326Sjhb // 31571088Sjasone // This version does not require access the frame, so it can be called 316126326Sjhb // from interpreted code 31783650Sjhb // The caller (or one of it's callers) must use a ResourceMark 31899072Sjulian // in order to correctly free the result. 31999072Sjulian // 320113625Sjhb static char* generate_class_cast_message(const char* name, const char* klass, 32199072Sjulian const char* gripe = " cannot be cast to "); 32271088Sjasone 32397995Sjhb // Resolves a call site- may patch in the destination of the call into the 32497995Sjhb // compiled code. 32571088Sjasone static methodHandle resolve_helper(JavaThread *thread, 32697995Sjhb bool is_virtual, 32772200Sbmilekic bool is_optimized, TRAPS); 32874912Sjhb 32971088Sjasone private: 33071088Sjasone // deopt blob 33171088Sjasone static void generate_deopt_blob(void); 33271088Sjasone 33371088Sjasone public: 33483366Sjulian static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; } 33571088Sjasone 33683366Sjulian // Resets a call-site in compiled code so it will get resolved again. 33771088Sjasone static methodHandle reresolve_call_site(JavaThread *thread, TRAPS); 33871088Sjasone 33971088Sjasone // In the code prolog, if the klass comparison fails, the inline cache 34071088Sjasone // misses and the call site is patched to megamorphic 34171088Sjasone static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS); 34271088Sjasone 34371088Sjasone // Find the method that called us. 344126326Sjhb static methodHandle find_callee_method(JavaThread* thread, TRAPS); 34571088Sjasone 34671088Sjasone 34771088Sjasone private: 34883366Sjulian static Handle find_callee_info(JavaThread* thread, 34971088Sjasone Bytecodes::Code& bc, 35071088Sjasone CallInfo& callinfo, TRAPS); 35171088Sjasone static Handle find_callee_info_helper(JavaThread* thread, 352122352Stanimura vframeStream& vfst, 35371088Sjasone Bytecodes::Code& bc, 35471088Sjasone CallInfo& callinfo, TRAPS); 355126326Sjhb 35671088Sjasone static address clean_virtual_call_entry(); 357 static address clean_opt_virtual_call_entry(); 358 static address clean_static_call_entry(); 359 360 public: 361 362 // Read the array of BasicTypes from a Java signature, and compute where 363 // compiled Java code would like to put the results. Values in reg_lo and 364 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are 365 // registers, those above refer to 4-byte stack slots. All stack slots are 366 // based off of the window top. SharedInfo::stack0 refers to the first usable 367 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word 368 // 4-bytes higher. So for sparc because the register window save area is at 369 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0 370 // will be just above it. ( 371 // return value is the maximum number of VMReg stack slots the convention will use. 372 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed, int is_outgoing); 373 374 static void check_member_name_argument_is_last_argument(const methodHandle& method, 375 const BasicType* sig_bt, 376 const VMRegPair* regs) NOT_DEBUG_RETURN; 377 378 // Ditto except for calling C 379 // 380 // C argument in register AND stack slot. 381 // Some architectures require that an argument must be passed in a register 382 // AND in a stack slot. These architectures provide a second VMRegPair array 383 // to be filled by the c_calling_convention method. On other architectures, 384 // NULL is being passed as the second VMRegPair array, so arguments are either 385 // passed in a register OR in a stack slot. 386 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2, 387 int total_args_passed); 388 389 // Compute the new number of arguments in the signature if 32 bit ints 390 // must be converted to longs. Needed if CCallingConventionRequiresIntsAsLongs 391 // is true. 392 static int convert_ints_to_longints_argcnt(int in_args_count, BasicType* in_sig_bt); 393 // Adapt a method's signature if it contains 32 bit integers that must 394 // be converted to longs. Needed if CCallingConventionRequiresIntsAsLongs 395 // is true. 396 static void convert_ints_to_longints(int i2l_argcnt, int& in_args_count, 397 BasicType*& in_sig_bt, VMRegPair*& in_regs); 398 399 // Generate I2C and C2I adapters. These adapters are simple argument marshalling 400 // blobs. Unlike adapters in the tiger and earlier releases the code in these 401 // blobs does not create a new frame and are therefore virtually invisible 402 // to the stack walking code. In general these blobs extend the callers stack 403 // as needed for the conversion of argument locations. 404 405 // When calling a c2i blob the code will always call the interpreter even if 406 // by the time we reach the blob there is compiled code available. This allows 407 // the blob to pass the incoming stack pointer (the sender sp) in a known 408 // location for the interpreter to record. This is used by the frame code 409 // to correct the sender code to match up with the stack pointer when the 410 // thread left the compiled code. In addition it allows the interpreter 411 // to remove the space the c2i adapter allocated to do its argument conversion. 412 413 // Although a c2i blob will always run interpreted even if compiled code is 414 // present if we see that compiled code is present the compiled call site 415 // will be patched/re-resolved so that later calls will run compiled. 416 417 // Additionally a c2i blob need to have a unverified entry because it can be reached 418 // in situations where the call site is an inlined cache site and may go megamorphic. 419 420 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed 421 // that the interpreter before it does any call dispatch will record the current 422 // stack pointer in the interpreter frame. On return it will restore the stack 423 // pointer as needed. This means the i2c adapter code doesn't need any special 424 // handshaking path with compiled code to keep the stack walking correct. 425 426 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm, 427 int total_args_passed, 428 int max_arg, 429 const BasicType *sig_bt, 430 const VMRegPair *regs, 431 AdapterFingerPrint* fingerprint); 432 433 static void gen_i2c_adapter(MacroAssembler *_masm, 434 int total_args_passed, 435 int comp_args_on_stack, 436 const BasicType *sig_bt, 437 const VMRegPair *regs); 438 439 // OSR support 440 441 // OSR_migration_begin will extract the jvm state from an interpreter 442 // frame (locals, monitors) and store the data in a piece of C heap 443 // storage. This then allows the interpreter frame to be removed from the 444 // stack and the OSR nmethod to be called. That method is called with a 445 // pointer to the C heap storage. This pointer is the return value from 446 // OSR_migration_begin. 447 448 static intptr_t* OSR_migration_begin(JavaThread *thread); 449 450 // OSR_migration_end is a trivial routine. It is called after the compiled 451 // method has extracted the jvm state from the C heap that OSR_migration_begin 452 // created. It's entire job is to simply free this storage. 453 static void OSR_migration_end(intptr_t* buf); 454 455 // Convert a sig into a calling convention register layout 456 // and find interesting things about it. 457 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size); 458 static VMReg name_for_receiver(); 459 460 // "Top of Stack" slots that may be unused by the calling convention but must 461 // otherwise be preserved. 462 // On Intel these are not necessary and the value can be zero. 463 // On Sparc this describes the words reserved for storing a register window 464 // when an interrupt occurs. 465 static uint out_preserve_stack_slots(); 466 467 // Is vector's size (in bytes) bigger than a size saved by default? 468 // For example, on x86 16 bytes XMM registers are saved by default. 469 static bool is_wide_vector(int size); 470 471 // Save and restore a native result 472 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots); 473 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots); 474 475 // Generate a native wrapper for a given method. The method takes arguments 476 // in the Java compiled code convention, marshals them to the native 477 // convention (handlizes oops, etc), transitions to native, makes the call, 478 // returns to java state (possibly blocking), unhandlizes any result and 479 // returns. 480 // 481 // The wrapper may contain special-case code if the given method 482 // is a JNI critical method, or a compiled method handle adapter, 483 // such as _invokeBasic, _linkToVirtual, etc. 484 static nmethod* generate_native_wrapper(MacroAssembler* masm, 485 const methodHandle& method, 486 int compile_id, 487 BasicType* sig_bt, 488 VMRegPair* regs, 489 BasicType ret_type); 490 491 // Block before entering a JNI critical method 492 static void block_for_jni_critical(JavaThread* thread); 493 494 // A compiled caller has just called the interpreter, but compiled code 495 // exists. Patch the caller so he no longer calls into the interpreter. 496 static void fixup_callers_callsite(Method* moop, address ret_pc); 497 static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb); 498 499 // Slow-path Locking and Unlocking 500 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread); 501 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread); 502 503 // Resolving of calls 504 static address resolve_static_call_C (JavaThread *thread); 505 static address resolve_virtual_call_C (JavaThread *thread); 506 static address resolve_opt_virtual_call_C(JavaThread *thread); 507 508 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.) 509 static void slow_arraycopy_C(oopDesc* src, jint src_pos, 510 oopDesc* dest, jint dest_pos, 511 jint length, JavaThread* thread); 512 513 // handle ic miss with caller being compiled code 514 // wrong method handling (inline cache misses, zombie methods) 515 static address handle_wrong_method(JavaThread* thread); 516 static address handle_wrong_method_abstract(JavaThread* thread); 517 static address handle_wrong_method_ic_miss(JavaThread* thread); 518 519#ifndef PRODUCT 520 521 // Collect and print inline cache miss statistics 522 private: 523 enum { maxICmiss_count = 100 }; 524 static int _ICmiss_index; // length of IC miss histogram 525 static int _ICmiss_count[maxICmiss_count]; // miss counts 526 static address _ICmiss_at[maxICmiss_count]; // miss addresses 527 static void trace_ic_miss(address at); 528 529 public: 530 static int _throw_null_ctr; // throwing a null-pointer exception 531 static int _ic_miss_ctr; // total # of IC misses 532 static int _wrong_method_ctr; 533 static int _resolve_static_ctr; 534 static int _resolve_virtual_ctr; 535 static int _resolve_opt_virtual_ctr; 536 static int _implicit_null_throws; 537 static int _implicit_div0_throws; 538 539 static int _jbyte_array_copy_ctr; // Slow-path byte array copy 540 static int _jshort_array_copy_ctr; // Slow-path short array copy 541 static int _jint_array_copy_ctr; // Slow-path int array copy 542 static int _jlong_array_copy_ctr; // Slow-path long array copy 543 static int _oop_array_copy_ctr; // Slow-path oop array copy 544 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast 545 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks 546 static int _generic_array_copy_ctr; // Slow-path includes type decoding 547 static int _slow_array_copy_ctr; // Slow-path failed out to a method call 548 549 static int _new_instance_ctr; // 'new' object requires GC 550 static int _new_array_ctr; // 'new' array requires GC 551 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr; 552 static int _find_handler_ctr; // find exception handler 553 static int _rethrow_ctr; // rethrow exception 554 static int _mon_enter_stub_ctr; // monitor enter stub 555 static int _mon_exit_stub_ctr; // monitor exit stub 556 static int _mon_enter_ctr; // monitor enter slow 557 static int _mon_exit_ctr; // monitor exit slow 558 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check 559 560 // Statistics code 561 // stats for "normal" compiled calls (non-interface) 562 static int _nof_normal_calls; // total # of calls 563 static int _nof_optimized_calls; // total # of statically-bound calls 564 static int _nof_inlined_calls; // total # of inlined normal calls 565 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial) 566 static int _nof_inlined_static_calls; // total # of inlined static calls 567 // stats for compiled interface calls 568 static int _nof_interface_calls; // total # of compiled calls 569 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls 570 static int _nof_inlined_interface_calls; // total # of inlined interface calls 571 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls 572 // stats for runtime exceptions 573 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining 574 575 public: // for compiler 576 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; } 577 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; } 578 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; } 579 static address nof_static_calls_addr() { return (address)&_nof_static_calls; } 580 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; } 581 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; } 582 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; } 583 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; } 584 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; } 585 static void print_call_statistics(int comp_total); 586 static void print_statistics(); 587 static void print_ic_miss_histogram(); 588 589#endif // PRODUCT 590}; 591 592 593// --------------------------------------------------------------------------- 594// Implementation of AdapterHandlerLibrary 595// 596// This library manages argument marshaling adapters and native wrappers. 597// There are 2 flavors of adapters: I2C and C2I. 598// 599// The I2C flavor takes a stock interpreted call setup, marshals the 600// arguments for a Java-compiled call, and jumps to Rmethod-> code()-> 601// code_begin(). It is broken to call it without an nmethod assigned. 602// The usual behavior is to lift any register arguments up out of the 603// stack and possibly re-pack the extra arguments to be contiguous. 604// I2C adapters will save what the interpreter's stack pointer will be 605// after arguments are popped, then adjust the interpreter's frame 606// size to force alignment and possibly to repack the arguments. 607// After re-packing, it jumps to the compiled code start. There are 608// no safepoints in this adapter code and a GC cannot happen while 609// marshaling is in progress. 610// 611// The C2I flavor takes a stock compiled call setup plus the target method in 612// Rmethod, marshals the arguments for an interpreted call and jumps to 613// Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been 614// setup. Compiled frames are fixed-size and the args are likely not in the 615// right place. Hence all the args will likely be copied into the 616// interpreter's frame, forcing that frame to grow. The compiled frame's 617// outgoing stack args will be dead after the copy. 618// 619// Native wrappers, like adapters, marshal arguments. Unlike adapters they 620// also perform an official frame push & pop. They have a call to the native 621// routine in their middles and end in a return (instead of ending in a jump). 622// The native wrappers are stored in real nmethods instead of the BufferBlobs 623// used by the adapters. The code generation happens here because it's very 624// similar to what the adapters have to do. 625 626class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> { 627 friend class AdapterHandlerTable; 628 629 private: 630 AdapterFingerPrint* _fingerprint; 631 address _i2c_entry; 632 address _c2i_entry; 633 address _c2i_unverified_entry; 634 635#ifdef ASSERT 636 // Captures code and signature used to generate this adapter when 637 // verifying adapter equivalence. 638 unsigned char* _saved_code; 639 int _saved_code_length; 640#endif 641 642 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { 643 _fingerprint = fingerprint; 644 _i2c_entry = i2c_entry; 645 _c2i_entry = c2i_entry; 646 _c2i_unverified_entry = c2i_unverified_entry; 647#ifdef ASSERT 648 _saved_code = NULL; 649 _saved_code_length = 0; 650#endif 651 } 652 653 void deallocate(); 654 655 // should never be used 656 AdapterHandlerEntry(); 657 658 public: 659 address get_i2c_entry() const { return _i2c_entry; } 660 address get_c2i_entry() const { return _c2i_entry; } 661 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; } 662 address base_address(); 663 void relocate(address new_base); 664 665 AdapterFingerPrint* fingerprint() const { return _fingerprint; } 666 667 AdapterHandlerEntry* next() { 668 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next(); 669 } 670 671#ifdef ASSERT 672 // Used to verify that code generated for shared adapters is equivalent 673 void save_code (unsigned char* code, int length); 674 bool compare_code(unsigned char* code, int length); 675#endif 676 677 //virtual void print_on(outputStream* st) const; DO NOT USE 678 void print_adapter_on(outputStream* st) const; 679}; 680 681class AdapterHandlerLibrary: public AllStatic { 682 private: 683 static BufferBlob* _buffer; // the temporary code buffer in CodeCache 684 static AdapterHandlerTable* _adapters; 685 static AdapterHandlerEntry* _abstract_method_handler; 686 static BufferBlob* buffer_blob(); 687 static void initialize(); 688 689 public: 690 691 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, 692 address i2c_entry, address c2i_entry, address c2i_unverified_entry); 693 static void create_native_wrapper(const methodHandle& method); 694 static AdapterHandlerEntry* get_adapter(const methodHandle& method); 695 696 static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); } 697 static void print_handler_on(outputStream* st, const CodeBlob* b); 698 static bool contains(const CodeBlob* b); 699#ifndef PRODUCT 700 static void print_statistics(); 701#endif // PRODUCT 702 703}; 704 705#endif // SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP 706