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src/share/vm/runtime/sharedRuntime.hpp@a61af66fc99e (annotated)

src/share/vm/runtime/sharedRuntime.hpp

Sat, 01 Dec 2007 00:00:00 +0000

author
duke
date
Sat, 01 Dec 2007 00:00:00 +0000
changeset 435
a61af66fc99e
child 451
f8236e79048a
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duke@435 1 /*
duke@435 2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
duke@435 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435 4 *
duke@435 5 * This code is free software; you can redistribute it and/or modify it
duke@435 6 * under the terms of the GNU General Public License version 2 only, as
duke@435 7 * published by the Free Software Foundation.
duke@435 8 *
duke@435 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@435 13 * accompanied this code).
duke@435 14 *
duke@435 15 * You should have received a copy of the GNU General Public License version
duke@435 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@435 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435 18 *
duke@435 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435 20 * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435 21 * have any questions.
duke@435 22 *
duke@435 23 */
duke@435 24
duke@435 25 class AdapterHandlerEntry;
duke@435 26 class vframeStream;
duke@435 27
duke@435 28 // Runtime is the base class for various runtime interfaces
duke@435 29 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
duke@435 30 // shared functionality such as exception forwarding (C++ to
duke@435 31 // Java exceptions), locking/unlocking mechanisms, statistical
duke@435 32 // information, etc.
duke@435 33
duke@435 34 class SharedRuntime: AllStatic {
duke@435 35 private:
duke@435 36 static methodHandle resolve_sub_helper(JavaThread *thread,
duke@435 37 bool is_virtual,
duke@435 38 bool is_optimized, TRAPS);
duke@435 39
duke@435 40 // Shared stub locations
duke@435 41
duke@435 42 static RuntimeStub* _wrong_method_blob;
duke@435 43 static RuntimeStub* _ic_miss_blob;
duke@435 44 static RuntimeStub* _resolve_opt_virtual_call_blob;
duke@435 45 static RuntimeStub* _resolve_virtual_call_blob;
duke@435 46 static RuntimeStub* _resolve_static_call_blob;
duke@435 47
duke@435 48 static SafepointBlob* _polling_page_safepoint_handler_blob;
duke@435 49 static SafepointBlob* _polling_page_return_handler_blob;
duke@435 50 #ifdef COMPILER2
duke@435 51 static ExceptionBlob* _exception_blob;
duke@435 52 static UncommonTrapBlob* _uncommon_trap_blob;
duke@435 53 #endif // COMPILER2
duke@435 54
duke@435 55 #ifndef PRODUCT
duke@435 56
duke@435 57 // Counters
duke@435 58 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
duke@435 59
duke@435 60 #endif // !PRODUCT
duke@435 61 public:
duke@435 62 // The following arithmetic routines are used on platforms that do
duke@435 63 // not have machine instructions to implement their functionality.
duke@435 64 // Do not remove these.
duke@435 65
duke@435 66 // long arithmetics
duke@435 67 static jlong lmul(jlong y, jlong x);
duke@435 68 static jlong ldiv(jlong y, jlong x);
duke@435 69 static jlong lrem(jlong y, jlong x);
duke@435 70
duke@435 71 // float and double remainder
duke@435 72 static jfloat frem(jfloat x, jfloat y);
duke@435 73 static jdouble drem(jdouble x, jdouble y);
duke@435 74
duke@435 75 // float conversion (needs to set appropriate rounding mode)
duke@435 76 static jint f2i (jfloat x);
duke@435 77 static jlong f2l (jfloat x);
duke@435 78 static jint d2i (jdouble x);
duke@435 79 static jlong d2l (jdouble x);
duke@435 80 static jfloat d2f (jdouble x);
duke@435 81 static jfloat l2f (jlong x);
duke@435 82 static jdouble l2d (jlong x);
duke@435 83
duke@435 84 // double trigonometrics and transcendentals
duke@435 85 static jdouble dsin(jdouble x);
duke@435 86 static jdouble dcos(jdouble x);
duke@435 87 static jdouble dtan(jdouble x);
duke@435 88 static jdouble dlog(jdouble x);
duke@435 89 static jdouble dlog10(jdouble x);
duke@435 90 static jdouble dexp(jdouble x);
duke@435 91 static jdouble dpow(jdouble x, jdouble y);
duke@435 92
duke@435 93
duke@435 94 // exception handling across interpreter/compiler boundaries
duke@435 95 static address raw_exception_handler_for_return_address(address return_address);
duke@435 96 static address exception_handler_for_return_address(address return_address);
duke@435 97
duke@435 98 // exception handling and implicit exceptions
duke@435 99 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception,
duke@435 100 bool force_unwind, bool top_frame_only);
duke@435 101 enum ImplicitExceptionKind {
duke@435 102 IMPLICIT_NULL,
duke@435 103 IMPLICIT_DIVIDE_BY_ZERO,
duke@435 104 STACK_OVERFLOW
duke@435 105 };
duke@435 106 static void throw_AbstractMethodError(JavaThread* thread);
duke@435 107 static void throw_ArithmeticException(JavaThread* thread);
duke@435 108 static void throw_NullPointerException(JavaThread* thread);
duke@435 109 static void throw_NullPointerException_at_call(JavaThread* thread);
duke@435 110 static void throw_StackOverflowError(JavaThread* thread);
duke@435 111 static address continuation_for_implicit_exception(JavaThread* thread,
duke@435 112 address faulting_pc,
duke@435 113 ImplicitExceptionKind exception_kind);
duke@435 114
duke@435 115 // Shared stub locations
duke@435 116 static address get_poll_stub(address pc);
duke@435 117
duke@435 118 static address get_ic_miss_stub() {
duke@435 119 assert(_ic_miss_blob!= NULL, "oops");
duke@435 120 return _ic_miss_blob->instructions_begin();
duke@435 121 }
duke@435 122
duke@435 123 static address get_handle_wrong_method_stub() {
duke@435 124 assert(_wrong_method_blob!= NULL, "oops");
duke@435 125 return _wrong_method_blob->instructions_begin();
duke@435 126 }
duke@435 127
duke@435 128 #ifdef COMPILER2
duke@435 129 static void generate_uncommon_trap_blob(void);
duke@435 130 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; }
duke@435 131 #endif // COMPILER2
duke@435 132
duke@435 133 static address get_resolve_opt_virtual_call_stub(){
duke@435 134 assert(_resolve_opt_virtual_call_blob != NULL, "oops");
duke@435 135 return _resolve_opt_virtual_call_blob->instructions_begin();
duke@435 136 }
duke@435 137 static address get_resolve_virtual_call_stub() {
duke@435 138 assert(_resolve_virtual_call_blob != NULL, "oops");
duke@435 139 return _resolve_virtual_call_blob->instructions_begin();
duke@435 140 }
duke@435 141 static address get_resolve_static_call_stub() {
duke@435 142 assert(_resolve_static_call_blob != NULL, "oops");
duke@435 143 return _resolve_static_call_blob->instructions_begin();
duke@435 144 }
duke@435 145
duke@435 146 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; }
duke@435 147 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; }
duke@435 148
duke@435 149 // Counters
duke@435 150 #ifndef PRODUCT
duke@435 151 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
duke@435 152 #endif // PRODUCT
duke@435 153
duke@435 154 // Helper routine for full-speed JVMTI exception throwing support
duke@435 155 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception);
duke@435 156 static void throw_and_post_jvmti_exception(JavaThread *thread, symbolOop name, const char *message = NULL);
duke@435 157
duke@435 158 // To be used as the entry point for unresolved native methods.
duke@435 159 static address native_method_throw_unsatisfied_link_error_entry();
duke@435 160
duke@435 161 // bytecode tracing is only used by the TraceBytecodes
duke@435 162 static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0;
duke@435 163
duke@435 164 // Used to back off a spin lock that is under heavy contention
duke@435 165 static void yield_all(JavaThread* thread, int attempts = 0);
duke@435 166
duke@435 167 static oop retrieve_receiver( symbolHandle sig, frame caller );
duke@435 168
duke@435 169 static void verify_caller_frame(frame caller_frame, methodHandle callee_method) PRODUCT_RETURN;
duke@435 170 static methodHandle find_callee_method_inside_interpreter(frame caller_frame, methodHandle caller_method, int bci) PRODUCT_RETURN_(return methodHandle(););
duke@435 171
duke@435 172 static void register_finalizer(JavaThread* thread, oopDesc* obj);
duke@435 173
duke@435 174 // dtrace notifications
duke@435 175 static int dtrace_object_alloc(oopDesc* o);
duke@435 176 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o);
duke@435 177 static int dtrace_method_entry(JavaThread* thread, methodOopDesc* m);
duke@435 178 static int dtrace_method_exit(JavaThread* thread, methodOopDesc* m);
duke@435 179
duke@435 180 // Utility method for retrieving the Java thread id, returns 0 if the
duke@435 181 // thread is not a well formed Java thread.
duke@435 182 static jlong get_java_tid(Thread* thread);
duke@435 183
duke@435 184
duke@435 185 // used by native wrappers to reenable yellow if overflow happened in native code
duke@435 186 static void reguard_yellow_pages();
duke@435 187
duke@435 188 /**
duke@435 189 * Fill in the "X cannot be cast to a Y" message for ClassCastException
duke@435 190 *
duke@435 191 * @param thr the current thread
duke@435 192 * @param name the name of the class of the object attempted to be cast
duke@435 193 * @return the dynamically allocated exception message (must be freed
duke@435 194 * by the caller using a resource mark)
duke@435 195 *
duke@435 196 * BCP must refer to the current 'checkcast' opcode for the frame
duke@435 197 * on top of the stack.
duke@435 198 * The caller (or one of it's callers) must use a ResourceMark
duke@435 199 * in order to correctly free the result.
duke@435 200 */
duke@435 201 static char* generate_class_cast_message(JavaThread* thr, const char* name);
duke@435 202
duke@435 203 /**
duke@435 204 * Fill in the "X cannot be cast to a Y" message for ClassCastException
duke@435 205 *
duke@435 206 * @param name the name of the class of the object attempted to be cast
duke@435 207 * @param klass the name of the target klass attempt
duke@435 208 * @return the dynamically allocated exception message (must be freed
duke@435 209 * by the caller using a resource mark)
duke@435 210 *
duke@435 211 * This version does not require access the frame, so it can be called
duke@435 212 * from interpreted code
duke@435 213 * The caller (or one of it's callers) must use a ResourceMark
duke@435 214 * in order to correctly free the result.
duke@435 215 */
duke@435 216 static char* generate_class_cast_message(const char* name, const char* klass);
duke@435 217
duke@435 218 // Resolves a call site- may patch in the destination of the call into the
duke@435 219 // compiled code.
duke@435 220 static methodHandle resolve_helper(JavaThread *thread,
duke@435 221 bool is_virtual,
duke@435 222 bool is_optimized, TRAPS);
duke@435 223
duke@435 224 static void generate_stubs(void);
duke@435 225
duke@435 226 private:
duke@435 227 // deopt blob
duke@435 228 static void generate_deopt_blob(void);
duke@435 229 static DeoptimizationBlob* _deopt_blob;
duke@435 230
duke@435 231 public:
duke@435 232 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
duke@435 233
duke@435 234 // Resets a call-site in compiled code so it will get resolved again.
duke@435 235 static methodHandle reresolve_call_site(JavaThread *thread, TRAPS);
duke@435 236
duke@435 237 // In the code prolog, if the klass comparison fails, the inline cache
duke@435 238 // misses and the call site is patched to megamorphic
duke@435 239 static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS);
duke@435 240
duke@435 241 // Find the method that called us.
duke@435 242 static methodHandle find_callee_method(JavaThread* thread, TRAPS);
duke@435 243
duke@435 244
duke@435 245 private:
duke@435 246 static Handle find_callee_info(JavaThread* thread,
duke@435 247 Bytecodes::Code& bc,
duke@435 248 CallInfo& callinfo, TRAPS);
duke@435 249 static Handle find_callee_info_helper(JavaThread* thread,
duke@435 250 vframeStream& vfst,
duke@435 251 Bytecodes::Code& bc,
duke@435 252 CallInfo& callinfo, TRAPS);
duke@435 253
duke@435 254 static address clean_virtual_call_entry();
duke@435 255 static address clean_opt_virtual_call_entry();
duke@435 256 static address clean_static_call_entry();
duke@435 257
duke@435 258 public:
duke@435 259
duke@435 260
duke@435 261 static void create_native_wrapper (JavaThread* thread, methodOop method);
duke@435 262
duke@435 263 // Read the array of BasicTypes from a Java signature, and compute where
duke@435 264 // compiled Java code would like to put the results. Values in reg_lo and
duke@435 265 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
duke@435 266 // registers, those above refer to 4-byte stack slots. All stack slots are
duke@435 267 // based off of the window top. SharedInfo::stack0 refers to the first usable
duke@435 268 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
duke@435 269 // 4-bytes higher. So for sparc because the register window save area is at
duke@435 270 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0
duke@435 271 // will be just above it. (
duke@435 272 // return value is the maximum number of VMReg stack slots the convention will use.
duke@435 273 static int java_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed, int is_outgoing);
duke@435 274
duke@435 275 // Ditto except for calling C
duke@435 276 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
duke@435 277
duke@435 278 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
duke@435 279 // blobs. Unlike adapters in the tiger and earlier releases the code in these
duke@435 280 // blobs does not create a new frame and are therefore virtually invisible
duke@435 281 // to the stack walking code. In general these blobs extend the callers stack
duke@435 282 // as needed for the conversion of argument locations.
duke@435 283
duke@435 284 // When calling a c2i blob the code will always call the interpreter even if
duke@435 285 // by the time we reach the blob there is compiled code available. This allows
duke@435 286 // the blob to pass the incoming stack pointer (the sender sp) in a known
duke@435 287 // location for the interpreter to record. This is used by the frame code
duke@435 288 // to correct the sender code to match up with the stack pointer when the
duke@435 289 // thread left the compiled code. In addition it allows the interpreter
duke@435 290 // to remove the space the c2i adapter allocated to do it argument conversion.
duke@435 291
duke@435 292 // Although a c2i blob will always run interpreted even if compiled code is
duke@435 293 // present if we see that compiled code is present the compiled call site
duke@435 294 // will be patched/re-resolved so that later calls will run compiled.
duke@435 295
duke@435 296 // Aditionally a c2i blob need to have a unverified entry because it can be reached
duke@435 297 // in situations where the call site is an inlined cache site and may go megamorphic.
duke@435 298
duke@435 299 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
duke@435 300 // that the interpreter before it does any call dispatch will record the current
duke@435 301 // stack pointer in the interpreter frame. On return it will restore the stack
duke@435 302 // pointer as needed. This means the i2c adapter code doesn't need any special
duke@435 303 // handshaking path with compiled code to keep the stack walking correct.
duke@435 304
duke@435 305 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
duke@435 306 int total_args_passed,
duke@435 307 int max_arg,
duke@435 308 const BasicType *sig_bt,
duke@435 309 const VMRegPair *regs);
duke@435 310
duke@435 311 // OSR support
duke@435 312
duke@435 313 // OSR_migration_begin will extract the jvm state from an interpreter
duke@435 314 // frame (locals, monitors) and store the data in a piece of C heap
duke@435 315 // storage. This then allows the interpreter frame to be removed from the
duke@435 316 // stack and the OSR nmethod to be called. That method is called with a
duke@435 317 // pointer to the C heap storage. This pointer is the return value from
duke@435 318 // OSR_migration_begin.
duke@435 319
duke@435 320 static intptr_t* OSR_migration_begin( JavaThread *thread);
duke@435 321
duke@435 322 // OSR_migration_end is a trivial routine. It is called after the compiled
duke@435 323 // method has extracted the jvm state from the C heap that OSR_migration_begin
duke@435 324 // created. It's entire job is to simply free this storage.
duke@435 325 static void OSR_migration_end ( intptr_t* buf);
duke@435 326
duke@435 327 // Convert a sig into a calling convention register layout
duke@435 328 // and find interesting things about it.
duke@435 329 static VMRegPair* find_callee_arguments(symbolOop sig, bool is_static, int *arg_size);
duke@435 330 static VMReg name_for_receiver();
duke@435 331
duke@435 332 // "Top of Stack" slots that may be unused by the calling convention but must
duke@435 333 // otherwise be preserved.
duke@435 334 // On Intel these are not necessary and the value can be zero.
duke@435 335 // On Sparc this describes the words reserved for storing a register window
duke@435 336 // when an interrupt occurs.
duke@435 337 static uint out_preserve_stack_slots();
duke@435 338
duke@435 339 // Save and restore a native result
duke@435 340 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
duke@435 341 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
duke@435 342
duke@435 343 // Generate a native wrapper for a given method. The method takes arguments
duke@435 344 // in the Java compiled code convention, marshals them to the native
duke@435 345 // convention (handlizes oops, etc), transitions to native, makes the call,
duke@435 346 // returns to java state (possibly blocking), unhandlizes any result and
duke@435 347 // returns.
duke@435 348 static nmethod *generate_native_wrapper(MacroAssembler* masm,
duke@435 349 methodHandle method,
duke@435 350 int total_args_passed,
duke@435 351 int max_arg,
duke@435 352 BasicType *sig_bt,
duke@435 353 VMRegPair *regs,
duke@435 354 BasicType ret_type );
duke@435 355
duke@435 356 // A compiled caller has just called the interpreter, but compiled code
duke@435 357 // exists. Patch the caller so he no longer calls into the interpreter.
duke@435 358 static void fixup_callers_callsite(methodOopDesc* moop, address ret_pc);
duke@435 359
duke@435 360 // Slow-path Locking and Unlocking
duke@435 361 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
duke@435 362 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock);
duke@435 363
duke@435 364 // Resolving of calls
duke@435 365 static address resolve_static_call_C (JavaThread *thread);
duke@435 366 static address resolve_virtual_call_C (JavaThread *thread);
duke@435 367 static address resolve_opt_virtual_call_C(JavaThread *thread);
duke@435 368
duke@435 369 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
duke@435 370 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
duke@435 371 oopDesc* dest, jint dest_pos,
duke@435 372 jint length, JavaThread* thread);
duke@435 373
duke@435 374 // handle ic miss with caller being compiled code
duke@435 375 // wrong method handling (inline cache misses, zombie methods)
duke@435 376 static address handle_wrong_method(JavaThread* thread);
duke@435 377 static address handle_wrong_method_ic_miss(JavaThread* thread);
duke@435 378
duke@435 379 #ifndef PRODUCT
duke@435 380
duke@435 381 // Collect and print inline cache miss statistics
duke@435 382 private:
duke@435 383 enum { maxICmiss_count = 100 };
duke@435 384 static int _ICmiss_index; // length of IC miss histogram
duke@435 385 static int _ICmiss_count[maxICmiss_count]; // miss counts
duke@435 386 static address _ICmiss_at[maxICmiss_count]; // miss addresses
duke@435 387 static void trace_ic_miss(address at);
duke@435 388
duke@435 389 public:
duke@435 390 static int _monitor_enter_ctr; // monitor enter slow
duke@435 391 static int _monitor_exit_ctr; // monitor exit slow
duke@435 392 static int _throw_null_ctr; // throwing a null-pointer exception
duke@435 393 static int _ic_miss_ctr; // total # of IC misses
duke@435 394 static int _wrong_method_ctr;
duke@435 395 static int _resolve_static_ctr;
duke@435 396 static int _resolve_virtual_ctr;
duke@435 397 static int _resolve_opt_virtual_ctr;
duke@435 398 static int _implicit_null_throws;
duke@435 399 static int _implicit_div0_throws;
duke@435 400
duke@435 401 static int _jbyte_array_copy_ctr; // Slow-path byte array copy
duke@435 402 static int _jshort_array_copy_ctr; // Slow-path short array copy
duke@435 403 static int _jint_array_copy_ctr; // Slow-path int array copy
duke@435 404 static int _jlong_array_copy_ctr; // Slow-path long array copy
duke@435 405 static int _oop_array_copy_ctr; // Slow-path oop array copy
duke@435 406 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
duke@435 407 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
duke@435 408 static int _generic_array_copy_ctr; // Slow-path includes type decoding
duke@435 409 static int _slow_array_copy_ctr; // Slow-path failed out to a method call
duke@435 410
duke@435 411 static int _new_instance_ctr; // 'new' object requires GC
duke@435 412 static int _new_array_ctr; // 'new' array requires GC
duke@435 413 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
duke@435 414 static int _find_handler_ctr; // find exception handler
duke@435 415 static int _rethrow_ctr; // rethrow exception
duke@435 416 static int _mon_enter_stub_ctr; // monitor enter stub
duke@435 417 static int _mon_exit_stub_ctr; // monitor exit stub
duke@435 418 static int _mon_enter_ctr; // monitor enter slow
duke@435 419 static int _mon_exit_ctr; // monitor exit slow
duke@435 420 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
duke@435 421
duke@435 422 // Statistics code
duke@435 423 // stats for "normal" compiled calls (non-interface)
duke@435 424 static int _nof_normal_calls; // total # of calls
duke@435 425 static int _nof_optimized_calls; // total # of statically-bound calls
duke@435 426 static int _nof_inlined_calls; // total # of inlined normal calls
duke@435 427 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
duke@435 428 static int _nof_inlined_static_calls; // total # of inlined static calls
duke@435 429 // stats for compiled interface calls
duke@435 430 static int _nof_interface_calls; // total # of compiled calls
duke@435 431 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls
duke@435 432 static int _nof_inlined_interface_calls; // total # of inlined interface calls
duke@435 433 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls
duke@435 434 // stats for runtime exceptions
duke@435 435 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining
duke@435 436
duke@435 437 public: // for compiler
duke@435 438 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
duke@435 439 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; }
duke@435 440 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
duke@435 441 static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
duke@435 442 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
duke@435 443 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
duke@435 444 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; }
duke@435 445 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
duke@435 446 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; }
duke@435 447 static void print_call_statistics(int comp_total);
duke@435 448 static void print_statistics();
duke@435 449 static void print_ic_miss_histogram();
duke@435 450
duke@435 451 #endif // PRODUCT
duke@435 452 };
duke@435 453
duke@435 454
duke@435 455 // ---------------------------------------------------------------------------
duke@435 456 // Implementation of AdapterHandlerLibrary
duke@435 457 //
duke@435 458 // This library manages argument marshaling adapters and native wrappers.
duke@435 459 // There are 2 flavors of adapters: I2C and C2I.
duke@435 460 //
duke@435 461 // The I2C flavor takes a stock interpreted call setup, marshals the arguments
duke@435 462 // for a Java-compiled call, and jumps to Rmethod-> code()->
duke@435 463 // instructions_begin(). It is broken to call it without an nmethod assigned.
duke@435 464 // The usual behavior is to lift any register arguments up out of the stack
duke@435 465 // and possibly re-pack the extra arguments to be contigious. I2C adapters
duke@435 466 // will save what the interpreter's stack pointer will be after arguments are
duke@435 467 // popped, then adjust the interpreter's frame size to force alignment and
duke@435 468 // possibly to repack the arguments. After re-packing, it jumps to the
duke@435 469 // compiled code start. There are no safepoints in this adapter code and a GC
duke@435 470 // cannot happen while marshaling is in progress.
duke@435 471 //
duke@435 472 // The C2I flavor takes a stock compiled call setup plus the target method in
duke@435 473 // Rmethod, marshals the arguments for an interpreted call and jumps to
duke@435 474 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
duke@435 475 // setup. Compiled frames are fixed-size and the args are likely not in the
duke@435 476 // right place. Hence all the args will likely be copied into the
duke@435 477 // interpreter's frame, forcing that frame to grow. The compiled frame's
duke@435 478 // outgoing stack args will be dead after the copy.
duke@435 479 //
duke@435 480 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
duke@435 481 // also perform an offical frame push & pop. They have a call to the native
duke@435 482 // routine in their middles and end in a return (instead of ending in a jump).
duke@435 483 // The native wrappers are stored in real nmethods instead of the BufferBlobs
duke@435 484 // used by the adapters. The code generation happens here because it's very
duke@435 485 // similar to what the adapters have to do.
duke@435 486
duke@435 487 class AdapterHandlerEntry : public CHeapObj {
duke@435 488 private:
duke@435 489 address _i2c_entry;
duke@435 490 address _c2i_entry;
duke@435 491 address _c2i_unverified_entry;
duke@435 492
duke@435 493 public:
duke@435 494 AdapterHandlerEntry(address i2c_entry, address c2i_entry, address c2i_unverified_entry):
duke@435 495 _i2c_entry(i2c_entry),
duke@435 496 _c2i_entry(c2i_entry),
duke@435 497 _c2i_unverified_entry(c2i_unverified_entry) {
duke@435 498 }
duke@435 499 // The name we give all buffer blobs
duke@435 500 static const char* name;
duke@435 501
duke@435 502 address get_i2c_entry() { return _i2c_entry; }
duke@435 503 address get_c2i_entry() { return _c2i_entry; }
duke@435 504 address get_c2i_unverified_entry() { return _c2i_unverified_entry; }
duke@435 505 void relocate(address new_base);
duke@435 506 #ifndef PRODUCT
duke@435 507 void print();
duke@435 508 #endif /* PRODUCT */
duke@435 509 };
duke@435 510
duke@435 511
duke@435 512 class AdapterHandlerLibrary: public AllStatic {
duke@435 513 private:
duke@435 514 enum {
duke@435 515 AbstractMethodHandler = 1 // special handler for abstract methods
duke@435 516 };
duke@435 517 static GrowableArray<uint64_t>* _fingerprints; // the fingerprint collection
duke@435 518 static GrowableArray<AdapterHandlerEntry*> * _handlers; // the corresponding handlers
duke@435 519 static u_char _buffer[]; // the temporary code buffer
duke@435 520 static void initialize();
duke@435 521 static AdapterHandlerEntry* get_entry( int index ) { return _handlers->at(index); }
duke@435 522 static int get_create_adapter_index(methodHandle method);
duke@435 523 static address get_i2c_entry( int index ) { return get_entry(index)->get_i2c_entry(); }
duke@435 524 static address get_c2i_entry( int index ) { return get_entry(index)->get_c2i_entry(); }
duke@435 525 static address get_c2i_unverified_entry( int index ) { return get_entry(index)->get_c2i_unverified_entry(); }
duke@435 526
duke@435 527 public:
duke@435 528 static nmethod* create_native_wrapper(methodHandle method);
duke@435 529 static AdapterHandlerEntry* get_adapter(methodHandle method) { return get_entry(get_create_adapter_index(method)); }
duke@435 530
duke@435 531 #ifndef PRODUCT
duke@435 532 static void print_handler(CodeBlob* b);
duke@435 533 static bool contains(CodeBlob* b);
duke@435 534 #endif /* PRODUCT */
duke@435 535
duke@435 536 };

Mercurial Repository: jdk8-mips64-public/hotspot

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