Mercurial > hg > truffle
annotate src/share/vm/runtime/sharedRuntime.hpp @ 1250:3f5b7efb9642
6920293: OptimizeStringConcat causing core dumps
Reviewed-by: kvn, twisti
| author | never |
|---|---|
| date | Fri, 05 Feb 2010 11:07:40 -0800 |
| parents | 74c848d437ab |
| children | 3cf667df43ef |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright 1997-2010 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; | |
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26 class AdapterHandlerTable; |
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27 class AdapterFingerPrint; |
| 0 | 28 class vframeStream; |
| 29 | |
| 30 // Runtime is the base class for various runtime interfaces | |
| 31 // (InterpreterRuntime, CompilerRuntime, etc.). It provides | |
| 32 // shared functionality such as exception forwarding (C++ to | |
| 33 // Java exceptions), locking/unlocking mechanisms, statistical | |
| 34 // information, etc. | |
| 35 | |
| 36 class SharedRuntime: AllStatic { | |
| 37 private: | |
| 38 static methodHandle resolve_sub_helper(JavaThread *thread, | |
| 39 bool is_virtual, | |
| 40 bool is_optimized, TRAPS); | |
| 41 | |
| 42 // Shared stub locations | |
| 43 | |
| 44 static RuntimeStub* _wrong_method_blob; | |
| 45 static RuntimeStub* _ic_miss_blob; | |
| 46 static RuntimeStub* _resolve_opt_virtual_call_blob; | |
| 47 static RuntimeStub* _resolve_virtual_call_blob; | |
| 48 static RuntimeStub* _resolve_static_call_blob; | |
| 49 | |
| 50 static SafepointBlob* _polling_page_safepoint_handler_blob; | |
| 51 static SafepointBlob* _polling_page_return_handler_blob; | |
| 52 #ifdef COMPILER2 | |
| 53 static ExceptionBlob* _exception_blob; | |
| 54 static UncommonTrapBlob* _uncommon_trap_blob; | |
| 55 #endif // COMPILER2 | |
| 56 | |
| 57 #ifndef PRODUCT | |
| 58 | |
| 59 // Counters | |
| 60 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable) | |
| 61 | |
| 62 #endif // !PRODUCT | |
| 63 public: | |
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64 |
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65 // max bytes for each dtrace string parameter |
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66 enum { max_dtrace_string_size = 256 }; |
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67 |
| 0 | 68 // The following arithmetic routines are used on platforms that do |
| 69 // not have machine instructions to implement their functionality. | |
| 70 // Do not remove these. | |
| 71 | |
| 72 // long arithmetics | |
| 73 static jlong lmul(jlong y, jlong x); | |
| 74 static jlong ldiv(jlong y, jlong x); | |
| 75 static jlong lrem(jlong y, jlong x); | |
| 76 | |
| 77 // float and double remainder | |
| 78 static jfloat frem(jfloat x, jfloat y); | |
| 79 static jdouble drem(jdouble x, jdouble y); | |
| 80 | |
| 81 // float conversion (needs to set appropriate rounding mode) | |
| 82 static jint f2i (jfloat x); | |
| 83 static jlong f2l (jfloat x); | |
| 84 static jint d2i (jdouble x); | |
| 85 static jlong d2l (jdouble x); | |
| 86 static jfloat d2f (jdouble x); | |
| 87 static jfloat l2f (jlong x); | |
| 88 static jdouble l2d (jlong x); | |
| 89 | |
| 90 // double trigonometrics and transcendentals | |
| 91 static jdouble dsin(jdouble x); | |
| 92 static jdouble dcos(jdouble x); | |
| 93 static jdouble dtan(jdouble x); | |
| 94 static jdouble dlog(jdouble x); | |
| 95 static jdouble dlog10(jdouble x); | |
| 96 static jdouble dexp(jdouble x); | |
| 97 static jdouble dpow(jdouble x, jdouble y); | |
| 98 | |
| 99 | |
| 100 // exception handling across interpreter/compiler boundaries | |
| 101 static address raw_exception_handler_for_return_address(address return_address); | |
| 102 static address exception_handler_for_return_address(address return_address); | |
| 103 | |
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104 #ifndef SERIALGC |
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105 // G1 write barriers |
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106 static void g1_wb_pre(oopDesc* orig, JavaThread *thread); |
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107 static void g1_wb_post(void* card_addr, JavaThread* thread); |
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108 #endif // !SERIALGC |
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109 |
| 0 | 110 // exception handling and implicit exceptions |
| 111 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
| 112 bool force_unwind, bool top_frame_only); | |
| 113 enum ImplicitExceptionKind { | |
| 114 IMPLICIT_NULL, | |
| 115 IMPLICIT_DIVIDE_BY_ZERO, | |
| 116 STACK_OVERFLOW | |
| 117 }; | |
| 118 static void throw_AbstractMethodError(JavaThread* thread); | |
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119 static void throw_IncompatibleClassChangeError(JavaThread* thread); |
| 0 | 120 static void throw_ArithmeticException(JavaThread* thread); |
| 121 static void throw_NullPointerException(JavaThread* thread); | |
| 122 static void throw_NullPointerException_at_call(JavaThread* thread); | |
| 123 static void throw_StackOverflowError(JavaThread* thread); | |
| 124 static address continuation_for_implicit_exception(JavaThread* thread, | |
| 125 address faulting_pc, | |
| 126 ImplicitExceptionKind exception_kind); | |
| 127 | |
| 128 // Shared stub locations | |
| 129 static address get_poll_stub(address pc); | |
| 130 | |
| 131 static address get_ic_miss_stub() { | |
| 132 assert(_ic_miss_blob!= NULL, "oops"); | |
| 133 return _ic_miss_blob->instructions_begin(); | |
| 134 } | |
| 135 | |
| 136 static address get_handle_wrong_method_stub() { | |
| 137 assert(_wrong_method_blob!= NULL, "oops"); | |
| 138 return _wrong_method_blob->instructions_begin(); | |
| 139 } | |
| 140 | |
| 141 #ifdef COMPILER2 | |
| 142 static void generate_uncommon_trap_blob(void); | |
| 143 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; } | |
| 144 #endif // COMPILER2 | |
| 145 | |
| 146 static address get_resolve_opt_virtual_call_stub(){ | |
| 147 assert(_resolve_opt_virtual_call_blob != NULL, "oops"); | |
| 148 return _resolve_opt_virtual_call_blob->instructions_begin(); | |
| 149 } | |
| 150 static address get_resolve_virtual_call_stub() { | |
| 151 assert(_resolve_virtual_call_blob != NULL, "oops"); | |
| 152 return _resolve_virtual_call_blob->instructions_begin(); | |
| 153 } | |
| 154 static address get_resolve_static_call_stub() { | |
| 155 assert(_resolve_static_call_blob != NULL, "oops"); | |
| 156 return _resolve_static_call_blob->instructions_begin(); | |
| 157 } | |
| 158 | |
| 159 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; } | |
| 160 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; } | |
| 161 | |
| 162 // Counters | |
| 163 #ifndef PRODUCT | |
| 164 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; } | |
| 165 #endif // PRODUCT | |
| 166 | |
| 167 // Helper routine for full-speed JVMTI exception throwing support | |
| 168 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception); | |
| 169 static void throw_and_post_jvmti_exception(JavaThread *thread, symbolOop name, const char *message = NULL); | |
| 170 | |
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171 // RedefineClasses() tracing support for obsolete method entry |
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172 static int rc_trace_method_entry(JavaThread* thread, methodOopDesc* m); |
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173 |
| 0 | 174 // To be used as the entry point for unresolved native methods. |
| 175 static address native_method_throw_unsatisfied_link_error_entry(); | |
| 176 | |
| 177 // bytecode tracing is only used by the TraceBytecodes | |
| 178 static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0; | |
| 179 | |
| 180 // Used to back off a spin lock that is under heavy contention | |
| 181 static void yield_all(JavaThread* thread, int attempts = 0); | |
| 182 | |
| 183 static oop retrieve_receiver( symbolHandle sig, frame caller ); | |
| 184 | |
| 185 static void register_finalizer(JavaThread* thread, oopDesc* obj); | |
| 186 | |
| 187 // dtrace notifications | |
| 188 static int dtrace_object_alloc(oopDesc* o); | |
| 189 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o); | |
| 190 static int dtrace_method_entry(JavaThread* thread, methodOopDesc* m); | |
| 191 static int dtrace_method_exit(JavaThread* thread, methodOopDesc* m); | |
| 192 | |
| 193 // Utility method for retrieving the Java thread id, returns 0 if the | |
| 194 // thread is not a well formed Java thread. | |
| 195 static jlong get_java_tid(Thread* thread); | |
| 196 | |
| 197 | |
| 198 // used by native wrappers to reenable yellow if overflow happened in native code | |
| 199 static void reguard_yellow_pages(); | |
| 200 | |
| 201 /** | |
| 202 * Fill in the "X cannot be cast to a Y" message for ClassCastException | |
| 203 * | |
| 204 * @param thr the current thread | |
| 205 * @param name the name of the class of the object attempted to be cast | |
| 206 * @return the dynamically allocated exception message (must be freed | |
| 207 * by the caller using a resource mark) | |
| 208 * | |
| 209 * BCP must refer to the current 'checkcast' opcode for the frame | |
| 210 * on top of the stack. | |
| 211 * The caller (or one of it's callers) must use a ResourceMark | |
| 212 * in order to correctly free the result. | |
| 213 */ | |
| 214 static char* generate_class_cast_message(JavaThread* thr, const char* name); | |
| 215 | |
| 216 /** | |
| 710 | 217 * Fill in the message for a WrongMethodTypeException |
| 218 * | |
| 219 * @param thr the current thread | |
| 220 * @param mtype (optional) expected method type (or argument class) | |
| 221 * @param mhandle (optional) actual method handle (or argument) | |
| 222 * @return the dynamically allocated exception message | |
| 223 * | |
| 224 * BCP for the frame on top of the stack must refer to an | |
| 225 * 'invokevirtual' op for a method handle, or an 'invokedyamic' op. | |
| 226 * The caller (or one of its callers) must use a ResourceMark | |
| 227 * in order to correctly free the result. | |
| 228 */ | |
| 229 static char* generate_wrong_method_type_message(JavaThread* thr, | |
| 230 oopDesc* mtype = NULL, | |
| 231 oopDesc* mhandle = NULL); | |
| 232 | |
| 233 /** Return non-null if the mtype is a klass or Class, not a MethodType. */ | |
| 234 static oop wrong_method_type_is_for_single_argument(JavaThread* thr, | |
| 235 oopDesc* mtype); | |
| 236 | |
| 237 /** | |
| 0 | 238 * Fill in the "X cannot be cast to a Y" message for ClassCastException |
| 239 * | |
| 240 * @param name the name of the class of the object attempted to be cast | |
| 241 * @param klass the name of the target klass attempt | |
| 710 | 242 * @param gripe the specific kind of problem being reported |
| 0 | 243 * @return the dynamically allocated exception message (must be freed |
| 244 * by the caller using a resource mark) | |
| 245 * | |
| 246 * This version does not require access the frame, so it can be called | |
| 247 * from interpreted code | |
| 248 * The caller (or one of it's callers) must use a ResourceMark | |
| 249 * in order to correctly free the result. | |
| 250 */ | |
| 710 | 251 static char* generate_class_cast_message(const char* name, const char* klass, |
| 252 const char* gripe = " cannot be cast to "); | |
| 0 | 253 |
| 254 // Resolves a call site- may patch in the destination of the call into the | |
| 255 // compiled code. | |
| 256 static methodHandle resolve_helper(JavaThread *thread, | |
| 257 bool is_virtual, | |
| 258 bool is_optimized, TRAPS); | |
| 259 | |
| 260 static void generate_stubs(void); | |
| 261 | |
| 262 private: | |
| 263 // deopt blob | |
| 264 static void generate_deopt_blob(void); | |
| 265 static DeoptimizationBlob* _deopt_blob; | |
| 266 | |
| 267 public: | |
| 268 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; } | |
| 269 | |
| 270 // Resets a call-site in compiled code so it will get resolved again. | |
| 271 static methodHandle reresolve_call_site(JavaThread *thread, TRAPS); | |
| 272 | |
| 273 // In the code prolog, if the klass comparison fails, the inline cache | |
| 274 // misses and the call site is patched to megamorphic | |
| 275 static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS); | |
| 276 | |
| 277 // Find the method that called us. | |
| 278 static methodHandle find_callee_method(JavaThread* thread, TRAPS); | |
| 279 | |
| 280 | |
| 281 private: | |
| 282 static Handle find_callee_info(JavaThread* thread, | |
| 283 Bytecodes::Code& bc, | |
| 284 CallInfo& callinfo, TRAPS); | |
| 285 static Handle find_callee_info_helper(JavaThread* thread, | |
| 286 vframeStream& vfst, | |
| 287 Bytecodes::Code& bc, | |
| 288 CallInfo& callinfo, TRAPS); | |
| 289 | |
| 290 static address clean_virtual_call_entry(); | |
| 291 static address clean_opt_virtual_call_entry(); | |
| 292 static address clean_static_call_entry(); | |
| 293 | |
| 294 public: | |
| 295 | |
| 296 // Read the array of BasicTypes from a Java signature, and compute where | |
| 297 // compiled Java code would like to put the results. Values in reg_lo and | |
| 298 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are | |
| 299 // registers, those above refer to 4-byte stack slots. All stack slots are | |
| 300 // based off of the window top. SharedInfo::stack0 refers to the first usable | |
| 301 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word | |
| 302 // 4-bytes higher. So for sparc because the register window save area is at | |
| 303 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0 | |
| 304 // will be just above it. ( | |
| 305 // return value is the maximum number of VMReg stack slots the convention will use. | |
| 306 static int java_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed, int is_outgoing); | |
| 307 | |
| 308 // Ditto except for calling C | |
| 309 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed); | |
| 310 | |
| 311 // Generate I2C and C2I adapters. These adapters are simple argument marshalling | |
| 312 // blobs. Unlike adapters in the tiger and earlier releases the code in these | |
| 313 // blobs does not create a new frame and are therefore virtually invisible | |
| 314 // to the stack walking code. In general these blobs extend the callers stack | |
| 315 // as needed for the conversion of argument locations. | |
| 316 | |
| 317 // When calling a c2i blob the code will always call the interpreter even if | |
| 318 // by the time we reach the blob there is compiled code available. This allows | |
| 319 // the blob to pass the incoming stack pointer (the sender sp) in a known | |
| 320 // location for the interpreter to record. This is used by the frame code | |
| 321 // to correct the sender code to match up with the stack pointer when the | |
| 322 // thread left the compiled code. In addition it allows the interpreter | |
| 323 // to remove the space the c2i adapter allocated to do it argument conversion. | |
| 324 | |
| 325 // Although a c2i blob will always run interpreted even if compiled code is | |
| 326 // present if we see that compiled code is present the compiled call site | |
| 327 // will be patched/re-resolved so that later calls will run compiled. | |
| 328 | |
| 329 // Aditionally a c2i blob need to have a unverified entry because it can be reached | |
| 330 // in situations where the call site is an inlined cache site and may go megamorphic. | |
| 331 | |
| 332 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed | |
| 333 // that the interpreter before it does any call dispatch will record the current | |
| 334 // stack pointer in the interpreter frame. On return it will restore the stack | |
| 335 // pointer as needed. This means the i2c adapter code doesn't need any special | |
| 336 // handshaking path with compiled code to keep the stack walking correct. | |
| 337 | |
| 338 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm, | |
| 339 int total_args_passed, | |
| 340 int max_arg, | |
| 341 const BasicType *sig_bt, | |
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342 const VMRegPair *regs, |
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343 AdapterFingerPrint* fingerprint); |
| 0 | 344 |
| 345 // OSR support | |
| 346 | |
| 347 // OSR_migration_begin will extract the jvm state from an interpreter | |
| 348 // frame (locals, monitors) and store the data in a piece of C heap | |
| 349 // storage. This then allows the interpreter frame to be removed from the | |
| 350 // stack and the OSR nmethod to be called. That method is called with a | |
| 351 // pointer to the C heap storage. This pointer is the return value from | |
| 352 // OSR_migration_begin. | |
| 353 | |
| 354 static intptr_t* OSR_migration_begin( JavaThread *thread); | |
| 355 | |
| 356 // OSR_migration_end is a trivial routine. It is called after the compiled | |
| 357 // method has extracted the jvm state from the C heap that OSR_migration_begin | |
| 358 // created. It's entire job is to simply free this storage. | |
| 359 static void OSR_migration_end ( intptr_t* buf); | |
| 360 | |
| 361 // Convert a sig into a calling convention register layout | |
| 362 // and find interesting things about it. | |
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363 static VMRegPair* find_callee_arguments(symbolOop sig, bool has_receiver, int *arg_size); |
| 0 | 364 static VMReg name_for_receiver(); |
| 365 | |
| 366 // "Top of Stack" slots that may be unused by the calling convention but must | |
| 367 // otherwise be preserved. | |
| 368 // On Intel these are not necessary and the value can be zero. | |
| 369 // On Sparc this describes the words reserved for storing a register window | |
| 370 // when an interrupt occurs. | |
| 371 static uint out_preserve_stack_slots(); | |
| 372 | |
| 373 // Save and restore a native result | |
| 374 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots ); | |
| 375 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots ); | |
| 376 | |
| 377 // Generate a native wrapper for a given method. The method takes arguments | |
| 378 // in the Java compiled code convention, marshals them to the native | |
| 379 // convention (handlizes oops, etc), transitions to native, makes the call, | |
| 380 // returns to java state (possibly blocking), unhandlizes any result and | |
| 381 // returns. | |
| 382 static nmethod *generate_native_wrapper(MacroAssembler* masm, | |
| 383 methodHandle method, | |
| 384 int total_args_passed, | |
| 385 int max_arg, | |
| 386 BasicType *sig_bt, | |
| 387 VMRegPair *regs, | |
| 388 BasicType ret_type ); | |
| 389 | |
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390 #ifdef HAVE_DTRACE_H |
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391 // Generate a dtrace wrapper for a given method. The method takes arguments |
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392 // in the Java compiled code convention, marshals them to the native |
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393 // convention (handlizes oops, etc), transitions to native, makes the call, |
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394 // returns to java state (possibly blocking), unhandlizes any result and |
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395 // returns. |
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396 static nmethod *generate_dtrace_nmethod(MacroAssembler* masm, |
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397 methodHandle method); |
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398 |
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399 // dtrace support to convert a Java string to utf8 |
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400 static void get_utf(oopDesc* src, address dst); |
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401 #endif // def HAVE_DTRACE_H |
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402 |
| 0 | 403 // A compiled caller has just called the interpreter, but compiled code |
| 404 // exists. Patch the caller so he no longer calls into the interpreter. | |
| 405 static void fixup_callers_callsite(methodOopDesc* moop, address ret_pc); | |
| 406 | |
| 407 // Slow-path Locking and Unlocking | |
| 408 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread); | |
| 409 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock); | |
| 410 | |
| 411 // Resolving of calls | |
| 412 static address resolve_static_call_C (JavaThread *thread); | |
| 413 static address resolve_virtual_call_C (JavaThread *thread); | |
| 414 static address resolve_opt_virtual_call_C(JavaThread *thread); | |
| 415 | |
| 416 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.) | |
| 417 static void slow_arraycopy_C(oopDesc* src, jint src_pos, | |
| 418 oopDesc* dest, jint dest_pos, | |
| 419 jint length, JavaThread* thread); | |
| 420 | |
| 421 // handle ic miss with caller being compiled code | |
| 422 // wrong method handling (inline cache misses, zombie methods) | |
| 423 static address handle_wrong_method(JavaThread* thread); | |
| 424 static address handle_wrong_method_ic_miss(JavaThread* thread); | |
| 425 | |
| 426 #ifndef PRODUCT | |
| 427 | |
| 428 // Collect and print inline cache miss statistics | |
| 429 private: | |
| 430 enum { maxICmiss_count = 100 }; | |
| 431 static int _ICmiss_index; // length of IC miss histogram | |
| 432 static int _ICmiss_count[maxICmiss_count]; // miss counts | |
| 433 static address _ICmiss_at[maxICmiss_count]; // miss addresses | |
| 434 static void trace_ic_miss(address at); | |
| 435 | |
| 436 public: | |
| 437 static int _monitor_enter_ctr; // monitor enter slow | |
| 438 static int _monitor_exit_ctr; // monitor exit slow | |
| 439 static int _throw_null_ctr; // throwing a null-pointer exception | |
| 440 static int _ic_miss_ctr; // total # of IC misses | |
| 441 static int _wrong_method_ctr; | |
| 442 static int _resolve_static_ctr; | |
| 443 static int _resolve_virtual_ctr; | |
| 444 static int _resolve_opt_virtual_ctr; | |
| 445 static int _implicit_null_throws; | |
| 446 static int _implicit_div0_throws; | |
| 447 | |
| 448 static int _jbyte_array_copy_ctr; // Slow-path byte array copy | |
| 449 static int _jshort_array_copy_ctr; // Slow-path short array copy | |
| 450 static int _jint_array_copy_ctr; // Slow-path int array copy | |
| 451 static int _jlong_array_copy_ctr; // Slow-path long array copy | |
| 452 static int _oop_array_copy_ctr; // Slow-path oop array copy | |
| 453 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast | |
| 454 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks | |
| 455 static int _generic_array_copy_ctr; // Slow-path includes type decoding | |
| 456 static int _slow_array_copy_ctr; // Slow-path failed out to a method call | |
| 457 | |
| 458 static int _new_instance_ctr; // 'new' object requires GC | |
| 459 static int _new_array_ctr; // 'new' array requires GC | |
| 460 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr; | |
| 461 static int _find_handler_ctr; // find exception handler | |
| 462 static int _rethrow_ctr; // rethrow exception | |
| 463 static int _mon_enter_stub_ctr; // monitor enter stub | |
| 464 static int _mon_exit_stub_ctr; // monitor exit stub | |
| 465 static int _mon_enter_ctr; // monitor enter slow | |
| 466 static int _mon_exit_ctr; // monitor exit slow | |
| 467 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check | |
| 468 | |
| 469 // Statistics code | |
| 470 // stats for "normal" compiled calls (non-interface) | |
| 471 static int _nof_normal_calls; // total # of calls | |
| 472 static int _nof_optimized_calls; // total # of statically-bound calls | |
| 473 static int _nof_inlined_calls; // total # of inlined normal calls | |
| 474 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial) | |
| 475 static int _nof_inlined_static_calls; // total # of inlined static calls | |
| 476 // stats for compiled interface calls | |
| 477 static int _nof_interface_calls; // total # of compiled calls | |
| 478 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls | |
| 479 static int _nof_inlined_interface_calls; // total # of inlined interface calls | |
| 480 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls | |
| 481 // stats for runtime exceptions | |
| 482 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining | |
| 483 | |
| 484 public: // for compiler | |
| 485 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; } | |
| 486 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; } | |
| 487 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; } | |
| 488 static address nof_static_calls_addr() { return (address)&_nof_static_calls; } | |
| 489 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; } | |
| 490 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; } | |
| 491 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; } | |
| 492 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; } | |
| 493 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; } | |
| 494 static void print_call_statistics(int comp_total); | |
| 495 static void print_statistics(); | |
| 496 static void print_ic_miss_histogram(); | |
| 497 | |
| 498 #endif // PRODUCT | |
| 499 }; | |
| 500 | |
| 501 | |
| 502 // --------------------------------------------------------------------------- | |
| 503 // Implementation of AdapterHandlerLibrary | |
| 504 // | |
| 505 // This library manages argument marshaling adapters and native wrappers. | |
| 506 // There are 2 flavors of adapters: I2C and C2I. | |
| 507 // | |
| 508 // The I2C flavor takes a stock interpreted call setup, marshals the arguments | |
| 509 // for a Java-compiled call, and jumps to Rmethod-> code()-> | |
| 510 // instructions_begin(). It is broken to call it without an nmethod assigned. | |
| 511 // The usual behavior is to lift any register arguments up out of the stack | |
| 512 // and possibly re-pack the extra arguments to be contigious. I2C adapters | |
| 513 // will save what the interpreter's stack pointer will be after arguments are | |
| 514 // popped, then adjust the interpreter's frame size to force alignment and | |
| 515 // possibly to repack the arguments. After re-packing, it jumps to the | |
| 516 // compiled code start. There are no safepoints in this adapter code and a GC | |
| 517 // cannot happen while marshaling is in progress. | |
| 518 // | |
| 519 // The C2I flavor takes a stock compiled call setup plus the target method in | |
| 520 // Rmethod, marshals the arguments for an interpreted call and jumps to | |
| 521 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been | |
| 522 // setup. Compiled frames are fixed-size and the args are likely not in the | |
| 523 // right place. Hence all the args will likely be copied into the | |
| 524 // interpreter's frame, forcing that frame to grow. The compiled frame's | |
| 525 // outgoing stack args will be dead after the copy. | |
| 526 // | |
| 527 // Native wrappers, like adapters, marshal arguments. Unlike adapters they | |
| 528 // also perform an offical frame push & pop. They have a call to the native | |
| 529 // routine in their middles and end in a return (instead of ending in a jump). | |
| 530 // The native wrappers are stored in real nmethods instead of the BufferBlobs | |
| 531 // used by the adapters. The code generation happens here because it's very | |
| 532 // similar to what the adapters have to do. | |
| 533 | |
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534 class AdapterHandlerEntry : public BasicHashtableEntry { |
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535 friend class AdapterHandlerTable; |
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536 |
| 0 | 537 private: |
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538 AdapterFingerPrint* _fingerprint; |
| 0 | 539 address _i2c_entry; |
| 540 address _c2i_entry; | |
| 541 address _c2i_unverified_entry; | |
| 542 | |
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543 #ifdef ASSERT |
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544 // Captures code and signature used to generate this adapter when |
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545 // verifing adapter equivalence. |
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546 unsigned char* _saved_code; |
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547 int _code_length; |
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548 BasicType* _saved_sig; |
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549 int _total_args_passed; |
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550 #endif |
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551 |
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552 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { |
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553 _fingerprint = fingerprint; |
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554 _i2c_entry = i2c_entry; |
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555 _c2i_entry = c2i_entry; |
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556 _c2i_unverified_entry = c2i_unverified_entry; |
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557 #ifdef ASSERT |
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558 _saved_code = NULL; |
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559 _code_length = 0; |
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560 _saved_sig = NULL; |
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561 _total_args_passed = 0; |
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562 #endif |
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563 } |
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564 |
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565 void deallocate(); |
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566 |
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567 // should never be used |
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568 AdapterHandlerEntry(); |
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569 |
| 0 | 570 public: |
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571 // The name we give all buffer blobs |
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572 static const char* name; |
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573 |
| 0 | 574 address get_i2c_entry() { return _i2c_entry; } |
| 575 address get_c2i_entry() { return _c2i_entry; } | |
| 576 address get_c2i_unverified_entry() { return _c2i_unverified_entry; } | |
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577 |
| 0 | 578 void relocate(address new_base); |
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579 |
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580 AdapterFingerPrint* fingerprint() { return _fingerprint; } |
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581 |
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582 AdapterHandlerEntry* next() { |
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583 return (AdapterHandlerEntry*)BasicHashtableEntry::next(); |
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584 } |
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585 |
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586 #ifdef ASSERT |
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587 // Used to verify that code generated for shared adapters is equivalent |
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588 void save_code(unsigned char* code, int length, int total_args_passed, BasicType* sig_bt); |
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589 bool compare_code(unsigned char* code, int length, int total_args_passed, BasicType* sig_bt); |
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590 #endif |
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591 |
| 0 | 592 #ifndef PRODUCT |
| 593 void print(); | |
| 594 #endif /* PRODUCT */ | |
| 595 }; | |
| 596 | |
| 597 class AdapterHandlerLibrary: public AllStatic { | |
| 598 private: | |
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599 static BufferBlob* _buffer; // the temporary code buffer in CodeCache |
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600 static AdapterHandlerTable* _adapters; |
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601 static AdapterHandlerEntry* _abstract_method_handler; |
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602 static BufferBlob* buffer_blob(); |
| 0 | 603 static void initialize(); |
| 604 | |
| 605 public: | |
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606 |
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607 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, |
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608 address i2c_entry, address c2i_entry, address c2i_unverified_entry); |
| 0 | 609 static nmethod* create_native_wrapper(methodHandle method); |
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610 static AdapterHandlerEntry* get_adapter(methodHandle method); |
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611 |
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612 #ifdef HAVE_DTRACE_H |
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613 static nmethod* create_dtrace_nmethod (methodHandle method); |
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614 #endif // HAVE_DTRACE_H |
| 0 | 615 |
| 616 #ifndef PRODUCT | |
| 617 static void print_handler(CodeBlob* b); | |
| 618 static bool contains(CodeBlob* b); | |
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619 static void print_statistics(); |
| 0 | 620 #endif /* PRODUCT */ |
| 621 | |
| 622 }; |