Mercurial > hg > truffle
annotate src/share/vm/runtime/sharedRuntime.hpp @ 196:d1605aabd0a1 jdk7-b30
6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell
| author | xdono |
|---|---|
| date | Wed, 02 Jul 2008 12:55:16 -0700 |
| parents | 018d5b58dd4f |
| children | 1ee8caae33af |
| rev | line source |
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| 0 | 1 /* |
| 196 | 2 * Copyright 1997-2008 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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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 | |
| 102 // exception handling and implicit exceptions | |
| 103 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
| 104 bool force_unwind, bool top_frame_only); | |
| 105 enum ImplicitExceptionKind { | |
| 106 IMPLICIT_NULL, | |
| 107 IMPLICIT_DIVIDE_BY_ZERO, | |
| 108 STACK_OVERFLOW | |
| 109 }; | |
| 110 static void throw_AbstractMethodError(JavaThread* thread); | |
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111 static void throw_IncompatibleClassChangeError(JavaThread* thread); |
| 0 | 112 static void throw_ArithmeticException(JavaThread* thread); |
| 113 static void throw_NullPointerException(JavaThread* thread); | |
| 114 static void throw_NullPointerException_at_call(JavaThread* thread); | |
| 115 static void throw_StackOverflowError(JavaThread* thread); | |
| 116 static address continuation_for_implicit_exception(JavaThread* thread, | |
| 117 address faulting_pc, | |
| 118 ImplicitExceptionKind exception_kind); | |
| 119 | |
| 120 // Shared stub locations | |
| 121 static address get_poll_stub(address pc); | |
| 122 | |
| 123 static address get_ic_miss_stub() { | |
| 124 assert(_ic_miss_blob!= NULL, "oops"); | |
| 125 return _ic_miss_blob->instructions_begin(); | |
| 126 } | |
| 127 | |
| 128 static address get_handle_wrong_method_stub() { | |
| 129 assert(_wrong_method_blob!= NULL, "oops"); | |
| 130 return _wrong_method_blob->instructions_begin(); | |
| 131 } | |
| 132 | |
| 133 #ifdef COMPILER2 | |
| 134 static void generate_uncommon_trap_blob(void); | |
| 135 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; } | |
| 136 #endif // COMPILER2 | |
| 137 | |
| 138 static address get_resolve_opt_virtual_call_stub(){ | |
| 139 assert(_resolve_opt_virtual_call_blob != NULL, "oops"); | |
| 140 return _resolve_opt_virtual_call_blob->instructions_begin(); | |
| 141 } | |
| 142 static address get_resolve_virtual_call_stub() { | |
| 143 assert(_resolve_virtual_call_blob != NULL, "oops"); | |
| 144 return _resolve_virtual_call_blob->instructions_begin(); | |
| 145 } | |
| 146 static address get_resolve_static_call_stub() { | |
| 147 assert(_resolve_static_call_blob != NULL, "oops"); | |
| 148 return _resolve_static_call_blob->instructions_begin(); | |
| 149 } | |
| 150 | |
| 151 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; } | |
| 152 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; } | |
| 153 | |
| 154 // Counters | |
| 155 #ifndef PRODUCT | |
| 156 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; } | |
| 157 #endif // PRODUCT | |
| 158 | |
| 159 // Helper routine for full-speed JVMTI exception throwing support | |
| 160 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception); | |
| 161 static void throw_and_post_jvmti_exception(JavaThread *thread, symbolOop name, const char *message = NULL); | |
| 162 | |
| 163 // To be used as the entry point for unresolved native methods. | |
| 164 static address native_method_throw_unsatisfied_link_error_entry(); | |
| 165 | |
| 166 // bytecode tracing is only used by the TraceBytecodes | |
| 167 static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0; | |
| 168 | |
| 169 // Used to back off a spin lock that is under heavy contention | |
| 170 static void yield_all(JavaThread* thread, int attempts = 0); | |
| 171 | |
| 172 static oop retrieve_receiver( symbolHandle sig, frame caller ); | |
| 173 | |
| 174 static void verify_caller_frame(frame caller_frame, methodHandle callee_method) PRODUCT_RETURN; | |
| 175 static methodHandle find_callee_method_inside_interpreter(frame caller_frame, methodHandle caller_method, int bci) PRODUCT_RETURN_(return methodHandle();); | |
| 176 | |
| 177 static void register_finalizer(JavaThread* thread, oopDesc* obj); | |
| 178 | |
| 179 // dtrace notifications | |
| 180 static int dtrace_object_alloc(oopDesc* o); | |
| 181 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o); | |
| 182 static int dtrace_method_entry(JavaThread* thread, methodOopDesc* m); | |
| 183 static int dtrace_method_exit(JavaThread* thread, methodOopDesc* m); | |
| 184 | |
| 185 // Utility method for retrieving the Java thread id, returns 0 if the | |
| 186 // thread is not a well formed Java thread. | |
| 187 static jlong get_java_tid(Thread* thread); | |
| 188 | |
| 189 | |
| 190 // used by native wrappers to reenable yellow if overflow happened in native code | |
| 191 static void reguard_yellow_pages(); | |
| 192 | |
| 193 /** | |
| 194 * Fill in the "X cannot be cast to a Y" message for ClassCastException | |
| 195 * | |
| 196 * @param thr the current thread | |
| 197 * @param name the name of the class of the object attempted to be cast | |
| 198 * @return the dynamically allocated exception message (must be freed | |
| 199 * by the caller using a resource mark) | |
| 200 * | |
| 201 * BCP must refer to the current 'checkcast' opcode for the frame | |
| 202 * on top of the stack. | |
| 203 * The caller (or one of it's callers) must use a ResourceMark | |
| 204 * in order to correctly free the result. | |
| 205 */ | |
| 206 static char* generate_class_cast_message(JavaThread* thr, const char* name); | |
| 207 | |
| 208 /** | |
| 209 * Fill in the "X cannot be cast to a Y" message for ClassCastException | |
| 210 * | |
| 211 * @param name the name of the class of the object attempted to be cast | |
| 212 * @param klass the name of the target klass attempt | |
| 213 * @return the dynamically allocated exception message (must be freed | |
| 214 * by the caller using a resource mark) | |
| 215 * | |
| 216 * This version does not require access the frame, so it can be called | |
| 217 * from interpreted code | |
| 218 * The caller (or one of it's callers) must use a ResourceMark | |
| 219 * in order to correctly free the result. | |
| 220 */ | |
| 221 static char* generate_class_cast_message(const char* name, const char* klass); | |
| 222 | |
| 223 // Resolves a call site- may patch in the destination of the call into the | |
| 224 // compiled code. | |
| 225 static methodHandle resolve_helper(JavaThread *thread, | |
| 226 bool is_virtual, | |
| 227 bool is_optimized, TRAPS); | |
| 228 | |
| 229 static void generate_stubs(void); | |
| 230 | |
| 231 private: | |
| 232 // deopt blob | |
| 233 static void generate_deopt_blob(void); | |
| 234 static DeoptimizationBlob* _deopt_blob; | |
| 235 | |
| 236 public: | |
| 237 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; } | |
| 238 | |
| 239 // Resets a call-site in compiled code so it will get resolved again. | |
| 240 static methodHandle reresolve_call_site(JavaThread *thread, TRAPS); | |
| 241 | |
| 242 // In the code prolog, if the klass comparison fails, the inline cache | |
| 243 // misses and the call site is patched to megamorphic | |
| 244 static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS); | |
| 245 | |
| 246 // Find the method that called us. | |
| 247 static methodHandle find_callee_method(JavaThread* thread, TRAPS); | |
| 248 | |
| 249 | |
| 250 private: | |
| 251 static Handle find_callee_info(JavaThread* thread, | |
| 252 Bytecodes::Code& bc, | |
| 253 CallInfo& callinfo, TRAPS); | |
| 254 static Handle find_callee_info_helper(JavaThread* thread, | |
| 255 vframeStream& vfst, | |
| 256 Bytecodes::Code& bc, | |
| 257 CallInfo& callinfo, TRAPS); | |
| 258 | |
| 259 static address clean_virtual_call_entry(); | |
| 260 static address clean_opt_virtual_call_entry(); | |
| 261 static address clean_static_call_entry(); | |
| 262 | |
| 263 public: | |
| 264 | |
| 265 // Read the array of BasicTypes from a Java signature, and compute where | |
| 266 // compiled Java code would like to put the results. Values in reg_lo and | |
| 267 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are | |
| 268 // registers, those above refer to 4-byte stack slots. All stack slots are | |
| 269 // based off of the window top. SharedInfo::stack0 refers to the first usable | |
| 270 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word | |
| 271 // 4-bytes higher. So for sparc because the register window save area is at | |
| 272 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0 | |
| 273 // will be just above it. ( | |
| 274 // return value is the maximum number of VMReg stack slots the convention will use. | |
| 275 static int java_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed, int is_outgoing); | |
| 276 | |
| 277 // Ditto except for calling C | |
| 278 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed); | |
| 279 | |
| 280 // Generate I2C and C2I adapters. These adapters are simple argument marshalling | |
| 281 // blobs. Unlike adapters in the tiger and earlier releases the code in these | |
| 282 // blobs does not create a new frame and are therefore virtually invisible | |
| 283 // to the stack walking code. In general these blobs extend the callers stack | |
| 284 // as needed for the conversion of argument locations. | |
| 285 | |
| 286 // When calling a c2i blob the code will always call the interpreter even if | |
| 287 // by the time we reach the blob there is compiled code available. This allows | |
| 288 // the blob to pass the incoming stack pointer (the sender sp) in a known | |
| 289 // location for the interpreter to record. This is used by the frame code | |
| 290 // to correct the sender code to match up with the stack pointer when the | |
| 291 // thread left the compiled code. In addition it allows the interpreter | |
| 292 // to remove the space the c2i adapter allocated to do it argument conversion. | |
| 293 | |
| 294 // Although a c2i blob will always run interpreted even if compiled code is | |
| 295 // present if we see that compiled code is present the compiled call site | |
| 296 // will be patched/re-resolved so that later calls will run compiled. | |
| 297 | |
| 298 // Aditionally a c2i blob need to have a unverified entry because it can be reached | |
| 299 // in situations where the call site is an inlined cache site and may go megamorphic. | |
| 300 | |
| 301 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed | |
| 302 // that the interpreter before it does any call dispatch will record the current | |
| 303 // stack pointer in the interpreter frame. On return it will restore the stack | |
| 304 // pointer as needed. This means the i2c adapter code doesn't need any special | |
| 305 // handshaking path with compiled code to keep the stack walking correct. | |
| 306 | |
| 307 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm, | |
| 308 int total_args_passed, | |
| 309 int max_arg, | |
| 310 const BasicType *sig_bt, | |
| 311 const VMRegPair *regs); | |
| 312 | |
| 313 // OSR support | |
| 314 | |
| 315 // OSR_migration_begin will extract the jvm state from an interpreter | |
| 316 // frame (locals, monitors) and store the data in a piece of C heap | |
| 317 // storage. This then allows the interpreter frame to be removed from the | |
| 318 // stack and the OSR nmethod to be called. That method is called with a | |
| 319 // pointer to the C heap storage. This pointer is the return value from | |
| 320 // OSR_migration_begin. | |
| 321 | |
| 322 static intptr_t* OSR_migration_begin( JavaThread *thread); | |
| 323 | |
| 324 // OSR_migration_end is a trivial routine. It is called after the compiled | |
| 325 // method has extracted the jvm state from the C heap that OSR_migration_begin | |
| 326 // created. It's entire job is to simply free this storage. | |
| 327 static void OSR_migration_end ( intptr_t* buf); | |
| 328 | |
| 329 // Convert a sig into a calling convention register layout | |
| 330 // and find interesting things about it. | |
| 331 static VMRegPair* find_callee_arguments(symbolOop sig, bool is_static, int *arg_size); | |
| 332 static VMReg name_for_receiver(); | |
| 333 | |
| 334 // "Top of Stack" slots that may be unused by the calling convention but must | |
| 335 // otherwise be preserved. | |
| 336 // On Intel these are not necessary and the value can be zero. | |
| 337 // On Sparc this describes the words reserved for storing a register window | |
| 338 // when an interrupt occurs. | |
| 339 static uint out_preserve_stack_slots(); | |
| 340 | |
| 341 // Save and restore a native result | |
| 342 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots ); | |
| 343 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots ); | |
| 344 | |
| 345 // Generate a native wrapper for a given method. The method takes arguments | |
| 346 // in the Java compiled code convention, marshals them to the native | |
| 347 // convention (handlizes oops, etc), transitions to native, makes the call, | |
| 348 // returns to java state (possibly blocking), unhandlizes any result and | |
| 349 // returns. | |
| 350 static nmethod *generate_native_wrapper(MacroAssembler* masm, | |
| 351 methodHandle method, | |
| 352 int total_args_passed, | |
| 353 int max_arg, | |
| 354 BasicType *sig_bt, | |
| 355 VMRegPair *regs, | |
| 356 BasicType ret_type ); | |
| 357 | |
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358 #ifdef HAVE_DTRACE_H |
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359 // Generate a dtrace wrapper for a given method. The method takes arguments |
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360 // in the Java compiled code convention, marshals them to the native |
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361 // convention (handlizes oops, etc), transitions to native, makes the call, |
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362 // returns to java state (possibly blocking), unhandlizes any result and |
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363 // returns. |
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364 static nmethod *generate_dtrace_nmethod(MacroAssembler* masm, |
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365 methodHandle method); |
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366 |
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367 // dtrace support to convert a Java string to utf8 |
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368 static void get_utf(oopDesc* src, address dst); |
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369 #endif // def HAVE_DTRACE_H |
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370 |
| 0 | 371 // A compiled caller has just called the interpreter, but compiled code |
| 372 // exists. Patch the caller so he no longer calls into the interpreter. | |
| 373 static void fixup_callers_callsite(methodOopDesc* moop, address ret_pc); | |
| 374 | |
| 375 // Slow-path Locking and Unlocking | |
| 376 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread); | |
| 377 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock); | |
| 378 | |
| 379 // Resolving of calls | |
| 380 static address resolve_static_call_C (JavaThread *thread); | |
| 381 static address resolve_virtual_call_C (JavaThread *thread); | |
| 382 static address resolve_opt_virtual_call_C(JavaThread *thread); | |
| 383 | |
| 384 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.) | |
| 385 static void slow_arraycopy_C(oopDesc* src, jint src_pos, | |
| 386 oopDesc* dest, jint dest_pos, | |
| 387 jint length, JavaThread* thread); | |
| 388 | |
| 389 // handle ic miss with caller being compiled code | |
| 390 // wrong method handling (inline cache misses, zombie methods) | |
| 391 static address handle_wrong_method(JavaThread* thread); | |
| 392 static address handle_wrong_method_ic_miss(JavaThread* thread); | |
| 393 | |
| 394 #ifndef PRODUCT | |
| 395 | |
| 396 // Collect and print inline cache miss statistics | |
| 397 private: | |
| 398 enum { maxICmiss_count = 100 }; | |
| 399 static int _ICmiss_index; // length of IC miss histogram | |
| 400 static int _ICmiss_count[maxICmiss_count]; // miss counts | |
| 401 static address _ICmiss_at[maxICmiss_count]; // miss addresses | |
| 402 static void trace_ic_miss(address at); | |
| 403 | |
| 404 public: | |
| 405 static int _monitor_enter_ctr; // monitor enter slow | |
| 406 static int _monitor_exit_ctr; // monitor exit slow | |
| 407 static int _throw_null_ctr; // throwing a null-pointer exception | |
| 408 static int _ic_miss_ctr; // total # of IC misses | |
| 409 static int _wrong_method_ctr; | |
| 410 static int _resolve_static_ctr; | |
| 411 static int _resolve_virtual_ctr; | |
| 412 static int _resolve_opt_virtual_ctr; | |
| 413 static int _implicit_null_throws; | |
| 414 static int _implicit_div0_throws; | |
| 415 | |
| 416 static int _jbyte_array_copy_ctr; // Slow-path byte array copy | |
| 417 static int _jshort_array_copy_ctr; // Slow-path short array copy | |
| 418 static int _jint_array_copy_ctr; // Slow-path int array copy | |
| 419 static int _jlong_array_copy_ctr; // Slow-path long array copy | |
| 420 static int _oop_array_copy_ctr; // Slow-path oop array copy | |
| 421 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast | |
| 422 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks | |
| 423 static int _generic_array_copy_ctr; // Slow-path includes type decoding | |
| 424 static int _slow_array_copy_ctr; // Slow-path failed out to a method call | |
| 425 | |
| 426 static int _new_instance_ctr; // 'new' object requires GC | |
| 427 static int _new_array_ctr; // 'new' array requires GC | |
| 428 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr; | |
| 429 static int _find_handler_ctr; // find exception handler | |
| 430 static int _rethrow_ctr; // rethrow exception | |
| 431 static int _mon_enter_stub_ctr; // monitor enter stub | |
| 432 static int _mon_exit_stub_ctr; // monitor exit stub | |
| 433 static int _mon_enter_ctr; // monitor enter slow | |
| 434 static int _mon_exit_ctr; // monitor exit slow | |
| 435 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check | |
| 436 | |
| 437 // Statistics code | |
| 438 // stats for "normal" compiled calls (non-interface) | |
| 439 static int _nof_normal_calls; // total # of calls | |
| 440 static int _nof_optimized_calls; // total # of statically-bound calls | |
| 441 static int _nof_inlined_calls; // total # of inlined normal calls | |
| 442 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial) | |
| 443 static int _nof_inlined_static_calls; // total # of inlined static calls | |
| 444 // stats for compiled interface calls | |
| 445 static int _nof_interface_calls; // total # of compiled calls | |
| 446 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls | |
| 447 static int _nof_inlined_interface_calls; // total # of inlined interface calls | |
| 448 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls | |
| 449 // stats for runtime exceptions | |
| 450 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining | |
| 451 | |
| 452 public: // for compiler | |
| 453 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; } | |
| 454 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; } | |
| 455 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; } | |
| 456 static address nof_static_calls_addr() { return (address)&_nof_static_calls; } | |
| 457 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; } | |
| 458 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; } | |
| 459 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; } | |
| 460 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; } | |
| 461 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; } | |
| 462 static void print_call_statistics(int comp_total); | |
| 463 static void print_statistics(); | |
| 464 static void print_ic_miss_histogram(); | |
| 465 | |
| 466 #endif // PRODUCT | |
| 467 }; | |
| 468 | |
| 469 | |
| 470 // --------------------------------------------------------------------------- | |
| 471 // Implementation of AdapterHandlerLibrary | |
| 472 // | |
| 473 // This library manages argument marshaling adapters and native wrappers. | |
| 474 // There are 2 flavors of adapters: I2C and C2I. | |
| 475 // | |
| 476 // The I2C flavor takes a stock interpreted call setup, marshals the arguments | |
| 477 // for a Java-compiled call, and jumps to Rmethod-> code()-> | |
| 478 // instructions_begin(). It is broken to call it without an nmethod assigned. | |
| 479 // The usual behavior is to lift any register arguments up out of the stack | |
| 480 // and possibly re-pack the extra arguments to be contigious. I2C adapters | |
| 481 // will save what the interpreter's stack pointer will be after arguments are | |
| 482 // popped, then adjust the interpreter's frame size to force alignment and | |
| 483 // possibly to repack the arguments. After re-packing, it jumps to the | |
| 484 // compiled code start. There are no safepoints in this adapter code and a GC | |
| 485 // cannot happen while marshaling is in progress. | |
| 486 // | |
| 487 // The C2I flavor takes a stock compiled call setup plus the target method in | |
| 488 // Rmethod, marshals the arguments for an interpreted call and jumps to | |
| 489 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been | |
| 490 // setup. Compiled frames are fixed-size and the args are likely not in the | |
| 491 // right place. Hence all the args will likely be copied into the | |
| 492 // interpreter's frame, forcing that frame to grow. The compiled frame's | |
| 493 // outgoing stack args will be dead after the copy. | |
| 494 // | |
| 495 // Native wrappers, like adapters, marshal arguments. Unlike adapters they | |
| 496 // also perform an offical frame push & pop. They have a call to the native | |
| 497 // routine in their middles and end in a return (instead of ending in a jump). | |
| 498 // The native wrappers are stored in real nmethods instead of the BufferBlobs | |
| 499 // used by the adapters. The code generation happens here because it's very | |
| 500 // similar to what the adapters have to do. | |
| 501 | |
| 502 class AdapterHandlerEntry : public CHeapObj { | |
| 503 private: | |
| 504 address _i2c_entry; | |
| 505 address _c2i_entry; | |
| 506 address _c2i_unverified_entry; | |
| 507 | |
| 508 public: | |
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509 |
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510 // The name we give all buffer blobs |
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511 static const char* name; |
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512 |
| 0 | 513 AdapterHandlerEntry(address i2c_entry, address c2i_entry, address c2i_unverified_entry): |
| 514 _i2c_entry(i2c_entry), | |
| 515 _c2i_entry(c2i_entry), | |
| 516 _c2i_unverified_entry(c2i_unverified_entry) { | |
| 517 } | |
| 518 | |
| 519 address get_i2c_entry() { return _i2c_entry; } | |
| 520 address get_c2i_entry() { return _c2i_entry; } | |
| 521 address get_c2i_unverified_entry() { return _c2i_unverified_entry; } | |
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522 |
| 0 | 523 void relocate(address new_base); |
| 524 #ifndef PRODUCT | |
| 525 void print(); | |
| 526 #endif /* PRODUCT */ | |
| 527 }; | |
| 528 | |
| 529 class AdapterHandlerLibrary: public AllStatic { | |
| 530 private: | |
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531 static u_char _buffer[]; // the temporary code buffer |
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532 static GrowableArray<uint64_t>* _fingerprints; // the fingerprint collection |
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533 static GrowableArray<AdapterHandlerEntry*> * _handlers; // the corresponding handlers |
| 0 | 534 enum { |
| 535 AbstractMethodHandler = 1 // special handler for abstract methods | |
| 536 }; | |
| 537 static void initialize(); | |
| 538 static int get_create_adapter_index(methodHandle method); | |
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539 static address get_i2c_entry( int index ) { |
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540 return get_entry(index)->get_i2c_entry(); |
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541 } |
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542 static address get_c2i_entry( int index ) { |
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543 return get_entry(index)->get_c2i_entry(); |
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544 } |
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545 static address get_c2i_unverified_entry( int index ) { |
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546 return get_entry(index)->get_c2i_unverified_entry(); |
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547 } |
| 0 | 548 |
| 549 public: | |
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550 static AdapterHandlerEntry* get_entry( int index ) { return _handlers->at(index); } |
| 0 | 551 static nmethod* create_native_wrapper(methodHandle method); |
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552 static AdapterHandlerEntry* get_adapter(methodHandle method) { |
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553 return get_entry(get_create_adapter_index(method)); |
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554 } |
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555 #ifdef HAVE_DTRACE_H |
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556 static nmethod* create_dtrace_nmethod (methodHandle method); |
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557 #endif // HAVE_DTRACE_H |
| 0 | 558 |
| 559 #ifndef PRODUCT | |
| 560 static void print_handler(CodeBlob* b); | |
| 561 static bool contains(CodeBlob* b); | |
| 562 #endif /* PRODUCT */ | |
| 563 | |
| 564 }; |