Mercurial > hg > truffle
annotate src/share/vm/runtime/sharedRuntime.hpp @ 1145:e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
Summary: Autonomic per-worker free block cache sizing, tunable coalition policies, fixes to per-size block statistics, retuned gain and bandwidth of some feedback loop filters to allow quicker reactivity to abrupt changes in ambient demand, and other heuristics to reduce fragmentation of the CMS old gen. Also tightened some assertions, including those related to locking.
Reviewed-by: jmasa
| author | ysr |
|---|---|
| date | Wed, 23 Dec 2009 09:23:54 -0800 |
| parents | 45463a04ca27 |
| children | dd57230ba8fe |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 class AdapterHandlerEntry; | |
| 26 class vframeStream; | |
| 27 | |
| 28 // Runtime is the base class for various runtime interfaces | |
| 29 // (InterpreterRuntime, CompilerRuntime, etc.). It provides | |
| 30 // shared functionality such as exception forwarding (C++ to | |
| 31 // Java exceptions), locking/unlocking mechanisms, statistical | |
| 32 // information, etc. | |
| 33 | |
| 34 class SharedRuntime: AllStatic { | |
| 35 private: | |
| 36 static methodHandle resolve_sub_helper(JavaThread *thread, | |
| 37 bool is_virtual, | |
| 38 bool is_optimized, TRAPS); | |
| 39 | |
| 40 // Shared stub locations | |
| 41 | |
| 42 static RuntimeStub* _wrong_method_blob; | |
| 43 static RuntimeStub* _ic_miss_blob; | |
| 44 static RuntimeStub* _resolve_opt_virtual_call_blob; | |
| 45 static RuntimeStub* _resolve_virtual_call_blob; | |
| 46 static RuntimeStub* _resolve_static_call_blob; | |
| 47 | |
| 48 static SafepointBlob* _polling_page_safepoint_handler_blob; | |
| 49 static SafepointBlob* _polling_page_return_handler_blob; | |
| 50 #ifdef COMPILER2 | |
| 51 static ExceptionBlob* _exception_blob; | |
| 52 static UncommonTrapBlob* _uncommon_trap_blob; | |
| 53 #endif // COMPILER2 | |
| 54 | |
| 55 #ifndef PRODUCT | |
| 56 | |
| 57 // Counters | |
| 58 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable) | |
| 59 | |
| 60 #endif // !PRODUCT | |
| 61 public: | |
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62 |
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63 // max bytes for each dtrace string parameter |
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64 enum { max_dtrace_string_size = 256 }; |
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65 |
| 0 | 66 // The following arithmetic routines are used on platforms that do |
| 67 // not have machine instructions to implement their functionality. | |
| 68 // Do not remove these. | |
| 69 | |
| 70 // long arithmetics | |
| 71 static jlong lmul(jlong y, jlong x); | |
| 72 static jlong ldiv(jlong y, jlong x); | |
| 73 static jlong lrem(jlong y, jlong x); | |
| 74 | |
| 75 // float and double remainder | |
| 76 static jfloat frem(jfloat x, jfloat y); | |
| 77 static jdouble drem(jdouble x, jdouble y); | |
| 78 | |
| 79 // float conversion (needs to set appropriate rounding mode) | |
| 80 static jint f2i (jfloat x); | |
| 81 static jlong f2l (jfloat x); | |
| 82 static jint d2i (jdouble x); | |
| 83 static jlong d2l (jdouble x); | |
| 84 static jfloat d2f (jdouble x); | |
| 85 static jfloat l2f (jlong x); | |
| 86 static jdouble l2d (jlong x); | |
| 87 | |
| 88 // double trigonometrics and transcendentals | |
| 89 static jdouble dsin(jdouble x); | |
| 90 static jdouble dcos(jdouble x); | |
| 91 static jdouble dtan(jdouble x); | |
| 92 static jdouble dlog(jdouble x); | |
| 93 static jdouble dlog10(jdouble x); | |
| 94 static jdouble dexp(jdouble x); | |
| 95 static jdouble dpow(jdouble x, jdouble y); | |
| 96 | |
| 97 | |
| 98 // exception handling across interpreter/compiler boundaries | |
| 99 static address raw_exception_handler_for_return_address(address return_address); | |
| 100 static address exception_handler_for_return_address(address return_address); | |
| 101 | |
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102 #ifndef SERIALGC |
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103 // G1 write barriers |
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104 static void g1_wb_pre(oopDesc* orig, JavaThread *thread); |
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105 static void g1_wb_post(void* card_addr, JavaThread* thread); |
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106 #endif // !SERIALGC |
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107 |
| 0 | 108 // exception handling and implicit exceptions |
| 109 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
| 110 bool force_unwind, bool top_frame_only); | |
| 111 enum ImplicitExceptionKind { | |
| 112 IMPLICIT_NULL, | |
| 113 IMPLICIT_DIVIDE_BY_ZERO, | |
| 114 STACK_OVERFLOW | |
| 115 }; | |
| 116 static void throw_AbstractMethodError(JavaThread* thread); | |
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117 static void throw_IncompatibleClassChangeError(JavaThread* thread); |
| 0 | 118 static void throw_ArithmeticException(JavaThread* thread); |
| 119 static void throw_NullPointerException(JavaThread* thread); | |
| 120 static void throw_NullPointerException_at_call(JavaThread* thread); | |
| 121 static void throw_StackOverflowError(JavaThread* thread); | |
| 122 static address continuation_for_implicit_exception(JavaThread* thread, | |
| 123 address faulting_pc, | |
| 124 ImplicitExceptionKind exception_kind); | |
| 125 | |
| 126 // Shared stub locations | |
| 127 static address get_poll_stub(address pc); | |
| 128 | |
| 129 static address get_ic_miss_stub() { | |
| 130 assert(_ic_miss_blob!= NULL, "oops"); | |
| 131 return _ic_miss_blob->instructions_begin(); | |
| 132 } | |
| 133 | |
| 134 static address get_handle_wrong_method_stub() { | |
| 135 assert(_wrong_method_blob!= NULL, "oops"); | |
| 136 return _wrong_method_blob->instructions_begin(); | |
| 137 } | |
| 138 | |
| 139 #ifdef COMPILER2 | |
| 140 static void generate_uncommon_trap_blob(void); | |
| 141 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; } | |
| 142 #endif // COMPILER2 | |
| 143 | |
| 144 static address get_resolve_opt_virtual_call_stub(){ | |
| 145 assert(_resolve_opt_virtual_call_blob != NULL, "oops"); | |
| 146 return _resolve_opt_virtual_call_blob->instructions_begin(); | |
| 147 } | |
| 148 static address get_resolve_virtual_call_stub() { | |
| 149 assert(_resolve_virtual_call_blob != NULL, "oops"); | |
| 150 return _resolve_virtual_call_blob->instructions_begin(); | |
| 151 } | |
| 152 static address get_resolve_static_call_stub() { | |
| 153 assert(_resolve_static_call_blob != NULL, "oops"); | |
| 154 return _resolve_static_call_blob->instructions_begin(); | |
| 155 } | |
| 156 | |
| 157 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; } | |
| 158 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; } | |
| 159 | |
| 160 // Counters | |
| 161 #ifndef PRODUCT | |
| 162 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; } | |
| 163 #endif // PRODUCT | |
| 164 | |
| 165 // Helper routine for full-speed JVMTI exception throwing support | |
| 166 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception); | |
| 167 static void throw_and_post_jvmti_exception(JavaThread *thread, symbolOop name, const char *message = NULL); | |
| 168 | |
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169 // RedefineClasses() tracing support for obsolete method entry |
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170 static int rc_trace_method_entry(JavaThread* thread, methodOopDesc* m); |
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171 |
| 0 | 172 // To be used as the entry point for unresolved native methods. |
| 173 static address native_method_throw_unsatisfied_link_error_entry(); | |
| 174 | |
| 175 // bytecode tracing is only used by the TraceBytecodes | |
| 176 static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0; | |
| 177 | |
| 178 // Used to back off a spin lock that is under heavy contention | |
| 179 static void yield_all(JavaThread* thread, int attempts = 0); | |
| 180 | |
| 181 static oop retrieve_receiver( symbolHandle sig, frame caller ); | |
| 182 | |
| 183 static void register_finalizer(JavaThread* thread, oopDesc* obj); | |
| 184 | |
| 185 // dtrace notifications | |
| 186 static int dtrace_object_alloc(oopDesc* o); | |
| 187 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o); | |
| 188 static int dtrace_method_entry(JavaThread* thread, methodOopDesc* m); | |
| 189 static int dtrace_method_exit(JavaThread* thread, methodOopDesc* m); | |
| 190 | |
| 191 // Utility method for retrieving the Java thread id, returns 0 if the | |
| 192 // thread is not a well formed Java thread. | |
| 193 static jlong get_java_tid(Thread* thread); | |
| 194 | |
| 195 | |
| 196 // used by native wrappers to reenable yellow if overflow happened in native code | |
| 197 static void reguard_yellow_pages(); | |
| 198 | |
| 199 /** | |
| 200 * Fill in the "X cannot be cast to a Y" message for ClassCastException | |
| 201 * | |
| 202 * @param thr the current thread | |
| 203 * @param name the name of the class of the object attempted to be cast | |
| 204 * @return the dynamically allocated exception message (must be freed | |
| 205 * by the caller using a resource mark) | |
| 206 * | |
| 207 * BCP must refer to the current 'checkcast' opcode for the frame | |
| 208 * on top of the stack. | |
| 209 * The caller (or one of it's callers) must use a ResourceMark | |
| 210 * in order to correctly free the result. | |
| 211 */ | |
| 212 static char* generate_class_cast_message(JavaThread* thr, const char* name); | |
| 213 | |
| 214 /** | |
| 710 | 215 * Fill in the message for a WrongMethodTypeException |
| 216 * | |
| 217 * @param thr the current thread | |
| 218 * @param mtype (optional) expected method type (or argument class) | |
| 219 * @param mhandle (optional) actual method handle (or argument) | |
| 220 * @return the dynamically allocated exception message | |
| 221 * | |
| 222 * BCP for the frame on top of the stack must refer to an | |
| 223 * 'invokevirtual' op for a method handle, or an 'invokedyamic' op. | |
| 224 * The caller (or one of its callers) must use a ResourceMark | |
| 225 * in order to correctly free the result. | |
| 226 */ | |
| 227 static char* generate_wrong_method_type_message(JavaThread* thr, | |
| 228 oopDesc* mtype = NULL, | |
| 229 oopDesc* mhandle = NULL); | |
| 230 | |
| 231 /** Return non-null if the mtype is a klass or Class, not a MethodType. */ | |
| 232 static oop wrong_method_type_is_for_single_argument(JavaThread* thr, | |
| 233 oopDesc* mtype); | |
| 234 | |
| 235 /** | |
| 0 | 236 * Fill in the "X cannot be cast to a Y" message for ClassCastException |
| 237 * | |
| 238 * @param name the name of the class of the object attempted to be cast | |
| 239 * @param klass the name of the target klass attempt | |
| 710 | 240 * @param gripe the specific kind of problem being reported |
| 0 | 241 * @return the dynamically allocated exception message (must be freed |
| 242 * by the caller using a resource mark) | |
| 243 * | |
| 244 * This version does not require access the frame, so it can be called | |
| 245 * from interpreted code | |
| 246 * The caller (or one of it's callers) must use a ResourceMark | |
| 247 * in order to correctly free the result. | |
| 248 */ | |
| 710 | 249 static char* generate_class_cast_message(const char* name, const char* klass, |
| 250 const char* gripe = " cannot be cast to "); | |
| 0 | 251 |
| 252 // Resolves a call site- may patch in the destination of the call into the | |
| 253 // compiled code. | |
| 254 static methodHandle resolve_helper(JavaThread *thread, | |
| 255 bool is_virtual, | |
| 256 bool is_optimized, TRAPS); | |
| 257 | |
| 258 static void generate_stubs(void); | |
| 259 | |
| 260 private: | |
| 261 // deopt blob | |
| 262 static void generate_deopt_blob(void); | |
| 263 static DeoptimizationBlob* _deopt_blob; | |
| 264 | |
| 265 public: | |
| 266 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; } | |
| 267 | |
| 268 // Resets a call-site in compiled code so it will get resolved again. | |
| 269 static methodHandle reresolve_call_site(JavaThread *thread, TRAPS); | |
| 270 | |
| 271 // In the code prolog, if the klass comparison fails, the inline cache | |
| 272 // misses and the call site is patched to megamorphic | |
| 273 static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS); | |
| 274 | |
| 275 // Find the method that called us. | |
| 276 static methodHandle find_callee_method(JavaThread* thread, TRAPS); | |
| 277 | |
| 278 | |
| 279 private: | |
| 280 static Handle find_callee_info(JavaThread* thread, | |
| 281 Bytecodes::Code& bc, | |
| 282 CallInfo& callinfo, TRAPS); | |
| 283 static Handle find_callee_info_helper(JavaThread* thread, | |
| 284 vframeStream& vfst, | |
| 285 Bytecodes::Code& bc, | |
| 286 CallInfo& callinfo, TRAPS); | |
| 287 | |
| 288 static address clean_virtual_call_entry(); | |
| 289 static address clean_opt_virtual_call_entry(); | |
| 290 static address clean_static_call_entry(); | |
| 291 | |
| 292 public: | |
| 293 | |
| 294 // Read the array of BasicTypes from a Java signature, and compute where | |
| 295 // compiled Java code would like to put the results. Values in reg_lo and | |
| 296 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are | |
| 297 // registers, those above refer to 4-byte stack slots. All stack slots are | |
| 298 // based off of the window top. SharedInfo::stack0 refers to the first usable | |
| 299 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word | |
| 300 // 4-bytes higher. So for sparc because the register window save area is at | |
| 301 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0 | |
| 302 // will be just above it. ( | |
| 303 // return value is the maximum number of VMReg stack slots the convention will use. | |
| 304 static int java_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed, int is_outgoing); | |
| 305 | |
| 306 // Ditto except for calling C | |
| 307 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed); | |
| 308 | |
| 309 // Generate I2C and C2I adapters. These adapters are simple argument marshalling | |
| 310 // blobs. Unlike adapters in the tiger and earlier releases the code in these | |
| 311 // blobs does not create a new frame and are therefore virtually invisible | |
| 312 // to the stack walking code. In general these blobs extend the callers stack | |
| 313 // as needed for the conversion of argument locations. | |
| 314 | |
| 315 // When calling a c2i blob the code will always call the interpreter even if | |
| 316 // by the time we reach the blob there is compiled code available. This allows | |
| 317 // the blob to pass the incoming stack pointer (the sender sp) in a known | |
| 318 // location for the interpreter to record. This is used by the frame code | |
| 319 // to correct the sender code to match up with the stack pointer when the | |
| 320 // thread left the compiled code. In addition it allows the interpreter | |
| 321 // to remove the space the c2i adapter allocated to do it argument conversion. | |
| 322 | |
| 323 // Although a c2i blob will always run interpreted even if compiled code is | |
| 324 // present if we see that compiled code is present the compiled call site | |
| 325 // will be patched/re-resolved so that later calls will run compiled. | |
| 326 | |
| 327 // Aditionally a c2i blob need to have a unverified entry because it can be reached | |
| 328 // in situations where the call site is an inlined cache site and may go megamorphic. | |
| 329 | |
| 330 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed | |
| 331 // that the interpreter before it does any call dispatch will record the current | |
| 332 // stack pointer in the interpreter frame. On return it will restore the stack | |
| 333 // pointer as needed. This means the i2c adapter code doesn't need any special | |
| 334 // handshaking path with compiled code to keep the stack walking correct. | |
| 335 | |
| 336 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm, | |
| 337 int total_args_passed, | |
| 338 int max_arg, | |
| 339 const BasicType *sig_bt, | |
| 340 const VMRegPair *regs); | |
| 341 | |
| 342 // OSR support | |
| 343 | |
| 344 // OSR_migration_begin will extract the jvm state from an interpreter | |
| 345 // frame (locals, monitors) and store the data in a piece of C heap | |
| 346 // storage. This then allows the interpreter frame to be removed from the | |
| 347 // stack and the OSR nmethod to be called. That method is called with a | |
| 348 // pointer to the C heap storage. This pointer is the return value from | |
| 349 // OSR_migration_begin. | |
| 350 | |
| 351 static intptr_t* OSR_migration_begin( JavaThread *thread); | |
| 352 | |
| 353 // OSR_migration_end is a trivial routine. It is called after the compiled | |
| 354 // method has extracted the jvm state from the C heap that OSR_migration_begin | |
| 355 // created. It's entire job is to simply free this storage. | |
| 356 static void OSR_migration_end ( intptr_t* buf); | |
| 357 | |
| 358 // Convert a sig into a calling convention register layout | |
| 359 // and find interesting things about it. | |
| 360 static VMRegPair* find_callee_arguments(symbolOop sig, bool is_static, int *arg_size); | |
| 361 static VMReg name_for_receiver(); | |
| 362 | |
| 363 // "Top of Stack" slots that may be unused by the calling convention but must | |
| 364 // otherwise be preserved. | |
| 365 // On Intel these are not necessary and the value can be zero. | |
| 366 // On Sparc this describes the words reserved for storing a register window | |
| 367 // when an interrupt occurs. | |
| 368 static uint out_preserve_stack_slots(); | |
| 369 | |
| 370 // Save and restore a native result | |
| 371 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots ); | |
| 372 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots ); | |
| 373 | |
| 374 // Generate a native wrapper for a given method. The method takes arguments | |
| 375 // in the Java compiled code convention, marshals them to the native | |
| 376 // convention (handlizes oops, etc), transitions to native, makes the call, | |
| 377 // returns to java state (possibly blocking), unhandlizes any result and | |
| 378 // returns. | |
| 379 static nmethod *generate_native_wrapper(MacroAssembler* masm, | |
| 380 methodHandle method, | |
| 381 int total_args_passed, | |
| 382 int max_arg, | |
| 383 BasicType *sig_bt, | |
| 384 VMRegPair *regs, | |
| 385 BasicType ret_type ); | |
| 386 | |
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387 #ifdef HAVE_DTRACE_H |
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388 // Generate a dtrace wrapper for a given method. The method takes arguments |
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389 // in the Java compiled code convention, marshals them to the native |
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390 // convention (handlizes oops, etc), transitions to native, makes the call, |
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391 // returns to java state (possibly blocking), unhandlizes any result and |
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392 // returns. |
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393 static nmethod *generate_dtrace_nmethod(MacroAssembler* masm, |
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394 methodHandle method); |
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395 |
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396 // dtrace support to convert a Java string to utf8 |
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397 static void get_utf(oopDesc* src, address dst); |
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398 #endif // def HAVE_DTRACE_H |
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399 |
| 0 | 400 // A compiled caller has just called the interpreter, but compiled code |
| 401 // exists. Patch the caller so he no longer calls into the interpreter. | |
| 402 static void fixup_callers_callsite(methodOopDesc* moop, address ret_pc); | |
| 403 | |
| 404 // Slow-path Locking and Unlocking | |
| 405 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread); | |
| 406 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock); | |
| 407 | |
| 408 // Resolving of calls | |
| 409 static address resolve_static_call_C (JavaThread *thread); | |
| 410 static address resolve_virtual_call_C (JavaThread *thread); | |
| 411 static address resolve_opt_virtual_call_C(JavaThread *thread); | |
| 412 | |
| 413 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.) | |
| 414 static void slow_arraycopy_C(oopDesc* src, jint src_pos, | |
| 415 oopDesc* dest, jint dest_pos, | |
| 416 jint length, JavaThread* thread); | |
| 417 | |
| 418 // handle ic miss with caller being compiled code | |
| 419 // wrong method handling (inline cache misses, zombie methods) | |
| 420 static address handle_wrong_method(JavaThread* thread); | |
| 421 static address handle_wrong_method_ic_miss(JavaThread* thread); | |
| 422 | |
| 423 #ifndef PRODUCT | |
| 424 | |
| 425 // Collect and print inline cache miss statistics | |
| 426 private: | |
| 427 enum { maxICmiss_count = 100 }; | |
| 428 static int _ICmiss_index; // length of IC miss histogram | |
| 429 static int _ICmiss_count[maxICmiss_count]; // miss counts | |
| 430 static address _ICmiss_at[maxICmiss_count]; // miss addresses | |
| 431 static void trace_ic_miss(address at); | |
| 432 | |
| 433 public: | |
| 434 static int _monitor_enter_ctr; // monitor enter slow | |
| 435 static int _monitor_exit_ctr; // monitor exit slow | |
| 436 static int _throw_null_ctr; // throwing a null-pointer exception | |
| 437 static int _ic_miss_ctr; // total # of IC misses | |
| 438 static int _wrong_method_ctr; | |
| 439 static int _resolve_static_ctr; | |
| 440 static int _resolve_virtual_ctr; | |
| 441 static int _resolve_opt_virtual_ctr; | |
| 442 static int _implicit_null_throws; | |
| 443 static int _implicit_div0_throws; | |
| 444 | |
| 445 static int _jbyte_array_copy_ctr; // Slow-path byte array copy | |
| 446 static int _jshort_array_copy_ctr; // Slow-path short array copy | |
| 447 static int _jint_array_copy_ctr; // Slow-path int array copy | |
| 448 static int _jlong_array_copy_ctr; // Slow-path long array copy | |
| 449 static int _oop_array_copy_ctr; // Slow-path oop array copy | |
| 450 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast | |
| 451 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks | |
| 452 static int _generic_array_copy_ctr; // Slow-path includes type decoding | |
| 453 static int _slow_array_copy_ctr; // Slow-path failed out to a method call | |
| 454 | |
| 455 static int _new_instance_ctr; // 'new' object requires GC | |
| 456 static int _new_array_ctr; // 'new' array requires GC | |
| 457 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr; | |
| 458 static int _find_handler_ctr; // find exception handler | |
| 459 static int _rethrow_ctr; // rethrow exception | |
| 460 static int _mon_enter_stub_ctr; // monitor enter stub | |
| 461 static int _mon_exit_stub_ctr; // monitor exit stub | |
| 462 static int _mon_enter_ctr; // monitor enter slow | |
| 463 static int _mon_exit_ctr; // monitor exit slow | |
| 464 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check | |
| 465 | |
| 466 // Statistics code | |
| 467 // stats for "normal" compiled calls (non-interface) | |
| 468 static int _nof_normal_calls; // total # of calls | |
| 469 static int _nof_optimized_calls; // total # of statically-bound calls | |
| 470 static int _nof_inlined_calls; // total # of inlined normal calls | |
| 471 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial) | |
| 472 static int _nof_inlined_static_calls; // total # of inlined static calls | |
| 473 // stats for compiled interface calls | |
| 474 static int _nof_interface_calls; // total # of compiled calls | |
| 475 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls | |
| 476 static int _nof_inlined_interface_calls; // total # of inlined interface calls | |
| 477 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls | |
| 478 // stats for runtime exceptions | |
| 479 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining | |
| 480 | |
| 481 public: // for compiler | |
| 482 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; } | |
| 483 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; } | |
| 484 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; } | |
| 485 static address nof_static_calls_addr() { return (address)&_nof_static_calls; } | |
| 486 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; } | |
| 487 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; } | |
| 488 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; } | |
| 489 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; } | |
| 490 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; } | |
| 491 static void print_call_statistics(int comp_total); | |
| 492 static void print_statistics(); | |
| 493 static void print_ic_miss_histogram(); | |
| 494 | |
| 495 #endif // PRODUCT | |
| 496 }; | |
| 497 | |
| 498 | |
| 499 // --------------------------------------------------------------------------- | |
| 500 // Implementation of AdapterHandlerLibrary | |
| 501 // | |
| 502 // This library manages argument marshaling adapters and native wrappers. | |
| 503 // There are 2 flavors of adapters: I2C and C2I. | |
| 504 // | |
| 505 // The I2C flavor takes a stock interpreted call setup, marshals the arguments | |
| 506 // for a Java-compiled call, and jumps to Rmethod-> code()-> | |
| 507 // instructions_begin(). It is broken to call it without an nmethod assigned. | |
| 508 // The usual behavior is to lift any register arguments up out of the stack | |
| 509 // and possibly re-pack the extra arguments to be contigious. I2C adapters | |
| 510 // will save what the interpreter's stack pointer will be after arguments are | |
| 511 // popped, then adjust the interpreter's frame size to force alignment and | |
| 512 // possibly to repack the arguments. After re-packing, it jumps to the | |
| 513 // compiled code start. There are no safepoints in this adapter code and a GC | |
| 514 // cannot happen while marshaling is in progress. | |
| 515 // | |
| 516 // The C2I flavor takes a stock compiled call setup plus the target method in | |
| 517 // Rmethod, marshals the arguments for an interpreted call and jumps to | |
| 518 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been | |
| 519 // setup. Compiled frames are fixed-size and the args are likely not in the | |
| 520 // right place. Hence all the args will likely be copied into the | |
| 521 // interpreter's frame, forcing that frame to grow. The compiled frame's | |
| 522 // outgoing stack args will be dead after the copy. | |
| 523 // | |
| 524 // Native wrappers, like adapters, marshal arguments. Unlike adapters they | |
| 525 // also perform an offical frame push & pop. They have a call to the native | |
| 526 // routine in their middles and end in a return (instead of ending in a jump). | |
| 527 // The native wrappers are stored in real nmethods instead of the BufferBlobs | |
| 528 // used by the adapters. The code generation happens here because it's very | |
| 529 // similar to what the adapters have to do. | |
| 530 | |
| 531 class AdapterHandlerEntry : public CHeapObj { | |
| 532 private: | |
| 533 address _i2c_entry; | |
| 534 address _c2i_entry; | |
| 535 address _c2i_unverified_entry; | |
| 536 | |
| 537 public: | |
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538 |
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539 // The name we give all buffer blobs |
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540 static const char* name; |
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541 |
| 0 | 542 AdapterHandlerEntry(address i2c_entry, address c2i_entry, address c2i_unverified_entry): |
| 543 _i2c_entry(i2c_entry), | |
| 544 _c2i_entry(c2i_entry), | |
| 545 _c2i_unverified_entry(c2i_unverified_entry) { | |
| 546 } | |
| 547 | |
| 548 address get_i2c_entry() { return _i2c_entry; } | |
| 549 address get_c2i_entry() { return _c2i_entry; } | |
| 550 address get_c2i_unverified_entry() { return _c2i_unverified_entry; } | |
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551 |
| 0 | 552 void relocate(address new_base); |
| 553 #ifndef PRODUCT | |
| 554 void print(); | |
| 555 #endif /* PRODUCT */ | |
| 556 }; | |
| 557 | |
| 558 class AdapterHandlerLibrary: public AllStatic { | |
| 559 private: | |
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560 static BufferBlob* _buffer; // the temporary code buffer in CodeCache |
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561 static GrowableArray<uint64_t>* _fingerprints; // the fingerprint collection |
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562 static GrowableArray<AdapterHandlerEntry*> * _handlers; // the corresponding handlers |
| 0 | 563 enum { |
| 564 AbstractMethodHandler = 1 // special handler for abstract methods | |
| 565 }; | |
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566 static BufferBlob* buffer_blob(); |
| 0 | 567 static void initialize(); |
| 568 static int get_create_adapter_index(methodHandle method); | |
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569 static address get_i2c_entry( int index ) { |
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570 return get_entry(index)->get_i2c_entry(); |
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571 } |
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572 static address get_c2i_entry( int index ) { |
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573 return get_entry(index)->get_c2i_entry(); |
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574 } |
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575 static address get_c2i_unverified_entry( int index ) { |
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576 return get_entry(index)->get_c2i_unverified_entry(); |
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577 } |
| 0 | 578 |
| 579 public: | |
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580 static AdapterHandlerEntry* get_entry( int index ) { return _handlers->at(index); } |
| 0 | 581 static nmethod* create_native_wrapper(methodHandle method); |
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582 static AdapterHandlerEntry* get_adapter(methodHandle method) { |
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583 return get_entry(get_create_adapter_index(method)); |
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584 } |
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585 #ifdef HAVE_DTRACE_H |
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586 static nmethod* create_dtrace_nmethod (methodHandle method); |
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587 #endif // HAVE_DTRACE_H |
| 0 | 588 |
| 589 #ifndef PRODUCT | |
| 590 static void print_handler(CodeBlob* b); | |
| 591 static bool contains(CodeBlob* b); | |
| 592 #endif /* PRODUCT */ | |
| 593 | |
| 594 }; |