annotate src/share/vm/ci/ciMethod.cpp @ 3530:8150fa46d2ed

7178145: Change constMethodOop::_exception_table to optionally inlined u2 table. Summary: Change constMethodOop::_exception_table to optionally inlined u2 table. Reviewed-by: bdelsart, coleenp, kamg
author jiangli
date Tue, 26 Jun 2012 19:08:44 -0400
parents 5eb9169b1a14
children 1d7922586cf6
rev   line source
duke@0 1 /*
jiangli@3530 2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
duke@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@0 4 *
duke@0 5 * This code is free software; you can redistribute it and/or modify it
duke@0 6 * under the terms of the GNU General Public License version 2 only, as
duke@0 7 * published by the Free Software Foundation.
duke@0 8 *
duke@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@0 13 * accompanied this code).
duke@0 14 *
duke@0 15 * You should have received a copy of the GNU General Public License version
duke@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0 18 *
trims@1472 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1472 20 * or visit www.oracle.com if you need additional information or have any
trims@1472 21 * questions.
duke@0 22 *
duke@0 23 */
duke@0 24
stefank@1885 25 #include "precompiled.hpp"
stefank@1885 26 #include "ci/ciCallProfile.hpp"
stefank@1885 27 #include "ci/ciExceptionHandler.hpp"
stefank@1885 28 #include "ci/ciInstanceKlass.hpp"
stefank@1885 29 #include "ci/ciMethod.hpp"
stefank@1885 30 #include "ci/ciMethodBlocks.hpp"
stefank@1885 31 #include "ci/ciMethodData.hpp"
stefank@1885 32 #include "ci/ciMethodKlass.hpp"
stefank@1885 33 #include "ci/ciStreams.hpp"
stefank@1885 34 #include "ci/ciSymbol.hpp"
stefank@1885 35 #include "ci/ciUtilities.hpp"
stefank@1885 36 #include "classfile/systemDictionary.hpp"
stefank@1885 37 #include "compiler/abstractCompiler.hpp"
stefank@1885 38 #include "compiler/compilerOracle.hpp"
stefank@1885 39 #include "compiler/methodLiveness.hpp"
stefank@1885 40 #include "interpreter/interpreter.hpp"
stefank@1885 41 #include "interpreter/linkResolver.hpp"
stefank@1885 42 #include "interpreter/oopMapCache.hpp"
stefank@1885 43 #include "memory/allocation.inline.hpp"
stefank@1885 44 #include "memory/resourceArea.hpp"
stefank@1885 45 #include "oops/generateOopMap.hpp"
stefank@1885 46 #include "oops/oop.inline.hpp"
stefank@1885 47 #include "prims/nativeLookup.hpp"
stefank@1885 48 #include "runtime/deoptimization.hpp"
stefank@1885 49 #include "utilities/bitMap.inline.hpp"
stefank@1885 50 #include "utilities/xmlstream.hpp"
stefank@1885 51 #ifdef COMPILER2
stefank@1885 52 #include "ci/bcEscapeAnalyzer.hpp"
stefank@1885 53 #include "ci/ciTypeFlow.hpp"
stefank@1885 54 #include "oops/methodOop.hpp"
stefank@1885 55 #endif
stefank@1885 56 #ifdef SHARK
stefank@1885 57 #include "ci/ciTypeFlow.hpp"
stefank@1885 58 #include "oops/methodOop.hpp"
stefank@1885 59 #endif
duke@0 60
duke@0 61 // ciMethod
duke@0 62 //
duke@0 63 // This class represents a methodOop in the HotSpot virtual
duke@0 64 // machine.
duke@0 65
duke@0 66
duke@0 67 // ------------------------------------------------------------------
duke@0 68 // ciMethod::ciMethod
duke@0 69 //
duke@0 70 // Loaded method.
duke@0 71 ciMethod::ciMethod(methodHandle h_m) : ciObject(h_m) {
duke@0 72 assert(h_m() != NULL, "no null method");
duke@0 73
duke@0 74 // These fields are always filled in in loaded methods.
duke@0 75 _flags = ciFlags(h_m()->access_flags());
duke@0 76
duke@0 77 // Easy to compute, so fill them in now.
duke@0 78 _max_stack = h_m()->max_stack();
duke@0 79 _max_locals = h_m()->max_locals();
duke@0 80 _code_size = h_m()->code_size();
duke@0 81 _intrinsic_id = h_m()->intrinsic_id();
jiangli@3530 82 _handler_count = h_m()->exception_table_length();
duke@0 83 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes();
duke@0 84 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
iveresov@1707 85 _is_c1_compilable = !h_m()->is_not_c1_compilable();
iveresov@1707 86 _is_c2_compilable = !h_m()->is_not_c2_compilable();
duke@0 87 // Lazy fields, filled in on demand. Require allocation.
duke@0 88 _code = NULL;
duke@0 89 _exception_handlers = NULL;
duke@0 90 _liveness = NULL;
duke@0 91 _method_blocks = NULL;
twisti@1616 92 #if defined(COMPILER2) || defined(SHARK)
duke@0 93 _flow = NULL;
kvn@1570 94 _bcea = NULL;
twisti@1616 95 #endif // COMPILER2 || SHARK
duke@0 96
kvn@780 97 ciEnv *env = CURRENT_ENV;
iveresov@1707 98 if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) {
duke@0 99 // 6328518 check hotswap conditions under the right lock.
duke@0 100 MutexLocker locker(Compile_lock);
duke@0 101 if (Dependencies::check_evol_method(h_m()) != NULL) {
iveresov@1707 102 _is_c1_compilable = false;
iveresov@1707 103 _is_c2_compilable = false;
duke@0 104 }
duke@0 105 } else {
duke@0 106 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
duke@0 107 }
duke@0 108
duke@0 109 if (instanceKlass::cast(h_m()->method_holder())->is_linked()) {
duke@0 110 _can_be_statically_bound = h_m()->can_be_statically_bound();
duke@0 111 } else {
duke@0 112 // Have to use a conservative value in this case.
duke@0 113 _can_be_statically_bound = false;
duke@0 114 }
duke@0 115
duke@0 116 // Adjust the definition of this condition to be more useful:
duke@0 117 // %%% take these conditions into account in vtable generation
duke@0 118 if (!_can_be_statically_bound && h_m()->is_private())
duke@0 119 _can_be_statically_bound = true;
duke@0 120 if (_can_be_statically_bound && h_m()->is_abstract())
duke@0 121 _can_be_statically_bound = false;
duke@0 122
duke@0 123 // generating _signature may allow GC and therefore move m.
duke@0 124 // These fields are always filled in.
coleenp@2069 125 _name = env->get_symbol(h_m()->name());
duke@0 126 _holder = env->get_object(h_m()->method_holder())->as_instance_klass();
coleenp@2069 127 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature());
jrose@2557 128 constantPoolHandle cpool = h_m()->constants();
jrose@2557 129 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
duke@0 130 _method_data = NULL;
duke@0 131 // Take a snapshot of these values, so they will be commensurate with the MDO.
iveresov@1707 132 if (ProfileInterpreter || TieredCompilation) {
duke@0 133 int invcnt = h_m()->interpreter_invocation_count();
duke@0 134 // if the value overflowed report it as max int
duke@0 135 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
duke@0 136 _interpreter_throwout_count = h_m()->interpreter_throwout_count();
duke@0 137 } else {
duke@0 138 _interpreter_invocation_count = 0;
duke@0 139 _interpreter_throwout_count = 0;
duke@0 140 }
duke@0 141 if (_interpreter_invocation_count == 0)
duke@0 142 _interpreter_invocation_count = 1;
duke@0 143 }
duke@0 144
duke@0 145
duke@0 146 // ------------------------------------------------------------------
duke@0 147 // ciMethod::ciMethod
duke@0 148 //
duke@0 149 // Unloaded method.
duke@0 150 ciMethod::ciMethod(ciInstanceKlass* holder,
twisti@2772 151 ciSymbol* name,
twisti@2772 152 ciSymbol* signature,
twisti@2772 153 ciInstanceKlass* accessor) :
twisti@2772 154 ciObject(ciMethodKlass::make()),
twisti@2772 155 _name( name),
twisti@2772 156 _holder( holder),
twisti@2772 157 _intrinsic_id( vmIntrinsics::_none),
twisti@2772 158 _liveness( NULL),
twisti@2772 159 _can_be_statically_bound(false),
twisti@2772 160 _method_blocks( NULL),
twisti@2772 161 _method_data( NULL)
twisti@1616 162 #if defined(COMPILER2) || defined(SHARK)
twisti@2772 163 ,
twisti@2772 164 _flow( NULL),
twisti@2772 165 _bcea( NULL)
twisti@1616 166 #endif // COMPILER2 || SHARK
twisti@2772 167 {
twisti@2772 168 // Usually holder and accessor are the same type but in some cases
twisti@2772 169 // the holder has the wrong class loader (e.g. invokedynamic call
twisti@2772 170 // sites) so we pass the accessor.
twisti@2772 171 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
duke@0 172 }
duke@0 173
duke@0 174
duke@0 175 // ------------------------------------------------------------------
duke@0 176 // ciMethod::load_code
duke@0 177 //
duke@0 178 // Load the bytecodes and exception handler table for this method.
duke@0 179 void ciMethod::load_code() {
duke@0 180 VM_ENTRY_MARK;
duke@0 181 assert(is_loaded(), "only loaded methods have code");
duke@0 182
duke@0 183 methodOop me = get_methodOop();
duke@0 184 Arena* arena = CURRENT_THREAD_ENV->arena();
duke@0 185
duke@0 186 // Load the bytecodes.
duke@0 187 _code = (address)arena->Amalloc(code_size());
duke@0 188 memcpy(_code, me->code_base(), code_size());
duke@0 189
duke@0 190 // Revert any breakpoint bytecodes in ci's copy
kvn@27 191 if (me->number_of_breakpoints() > 0) {
duke@0 192 BreakpointInfo* bp = instanceKlass::cast(me->method_holder())->breakpoints();
duke@0 193 for (; bp != NULL; bp = bp->next()) {
duke@0 194 if (bp->match(me)) {
duke@0 195 code_at_put(bp->bci(), bp->orig_bytecode());
duke@0 196 }
duke@0 197 }
duke@0 198 }
duke@0 199
duke@0 200 // And load the exception table.
jiangli@3530 201 ExceptionTable exc_table(me);
duke@0 202
duke@0 203 // Allocate one extra spot in our list of exceptions. This
duke@0 204 // last entry will be used to represent the possibility that
duke@0 205 // an exception escapes the method. See ciExceptionHandlerStream
duke@0 206 // for details.
duke@0 207 _exception_handlers =
duke@0 208 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
duke@0 209 * (_handler_count + 1));
duke@0 210 if (_handler_count > 0) {
duke@0 211 for (int i=0; i<_handler_count; i++) {
duke@0 212 _exception_handlers[i] = new (arena) ciExceptionHandler(
duke@0 213 holder(),
jiangli@3530 214 /* start */ exc_table.start_pc(i),
jiangli@3530 215 /* limit */ exc_table.end_pc(i),
jiangli@3530 216 /* goto pc */ exc_table.handler_pc(i),
jiangli@3530 217 /* cp index */ exc_table.catch_type_index(i));
duke@0 218 }
duke@0 219 }
duke@0 220
duke@0 221 // Put an entry at the end of our list to represent the possibility
duke@0 222 // of exceptional exit.
duke@0 223 _exception_handlers[_handler_count] =
duke@0 224 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
duke@0 225
duke@0 226 if (CIPrintMethodCodes) {
duke@0 227 print_codes();
duke@0 228 }
duke@0 229 }
duke@0 230
duke@0 231
duke@0 232 // ------------------------------------------------------------------
duke@0 233 // ciMethod::has_linenumber_table
duke@0 234 //
duke@0 235 // length unknown until decompression
duke@0 236 bool ciMethod::has_linenumber_table() const {
duke@0 237 check_is_loaded();
duke@0 238 VM_ENTRY_MARK;
duke@0 239 return get_methodOop()->has_linenumber_table();
duke@0 240 }
duke@0 241
duke@0 242
duke@0 243 // ------------------------------------------------------------------
duke@0 244 // ciMethod::compressed_linenumber_table
duke@0 245 u_char* ciMethod::compressed_linenumber_table() const {
duke@0 246 check_is_loaded();
duke@0 247 VM_ENTRY_MARK;
duke@0 248 return get_methodOop()->compressed_linenumber_table();
duke@0 249 }
duke@0 250
duke@0 251
duke@0 252 // ------------------------------------------------------------------
duke@0 253 // ciMethod::line_number_from_bci
duke@0 254 int ciMethod::line_number_from_bci(int bci) const {
duke@0 255 check_is_loaded();
duke@0 256 VM_ENTRY_MARK;
duke@0 257 return get_methodOop()->line_number_from_bci(bci);
duke@0 258 }
duke@0 259
duke@0 260
duke@0 261 // ------------------------------------------------------------------
duke@0 262 // ciMethod::vtable_index
duke@0 263 //
duke@0 264 // Get the position of this method's entry in the vtable, if any.
duke@0 265 int ciMethod::vtable_index() {
duke@0 266 check_is_loaded();
duke@0 267 assert(holder()->is_linked(), "must be linked");
duke@0 268 VM_ENTRY_MARK;
duke@0 269 return get_methodOop()->vtable_index();
duke@0 270 }
duke@0 271
duke@0 272
twisti@1616 273 #ifdef SHARK
twisti@1616 274 // ------------------------------------------------------------------
twisti@1616 275 // ciMethod::itable_index
twisti@1616 276 //
twisti@1616 277 // Get the position of this method's entry in the itable, if any.
twisti@1616 278 int ciMethod::itable_index() {
twisti@1616 279 check_is_loaded();
twisti@1616 280 assert(holder()->is_linked(), "must be linked");
twisti@1616 281 VM_ENTRY_MARK;
twisti@1616 282 return klassItable::compute_itable_index(get_methodOop());
twisti@1616 283 }
twisti@1616 284 #endif // SHARK
twisti@1616 285
twisti@1616 286
duke@0 287 // ------------------------------------------------------------------
duke@0 288 // ciMethod::native_entry
duke@0 289 //
duke@0 290 // Get the address of this method's native code, if any.
duke@0 291 address ciMethod::native_entry() {
duke@0 292 check_is_loaded();
duke@0 293 assert(flags().is_native(), "must be native method");
duke@0 294 VM_ENTRY_MARK;
duke@0 295 methodOop method = get_methodOop();
duke@0 296 address entry = method->native_function();
duke@0 297 assert(entry != NULL, "must be valid entry point");
duke@0 298 return entry;
duke@0 299 }
duke@0 300
duke@0 301
duke@0 302 // ------------------------------------------------------------------
duke@0 303 // ciMethod::interpreter_entry
duke@0 304 //
duke@0 305 // Get the entry point for running this method in the interpreter.
duke@0 306 address ciMethod::interpreter_entry() {
duke@0 307 check_is_loaded();
duke@0 308 VM_ENTRY_MARK;
duke@0 309 methodHandle mh(THREAD, get_methodOop());
duke@0 310 return Interpreter::entry_for_method(mh);
duke@0 311 }
duke@0 312
duke@0 313
duke@0 314 // ------------------------------------------------------------------
duke@0 315 // ciMethod::uses_balanced_monitors
duke@0 316 //
duke@0 317 // Does this method use monitors in a strict stack-disciplined manner?
duke@0 318 bool ciMethod::has_balanced_monitors() {
duke@0 319 check_is_loaded();
duke@0 320 if (_balanced_monitors) return true;
duke@0 321
duke@0 322 // Analyze the method to see if monitors are used properly.
duke@0 323 VM_ENTRY_MARK;
duke@0 324 methodHandle method(THREAD, get_methodOop());
duke@0 325 assert(method->has_monitor_bytecodes(), "should have checked this");
duke@0 326
duke@0 327 // Check to see if a previous compilation computed the
duke@0 328 // monitor-matching analysis.
duke@0 329 if (method->guaranteed_monitor_matching()) {
duke@0 330 _balanced_monitors = true;
duke@0 331 return true;
duke@0 332 }
duke@0 333
duke@0 334 {
duke@0 335 EXCEPTION_MARK;
duke@0 336 ResourceMark rm(THREAD);
duke@0 337 GeneratePairingInfo gpi(method);
duke@0 338 gpi.compute_map(CATCH);
duke@0 339 if (!gpi.monitor_safe()) {
duke@0 340 return false;
duke@0 341 }
duke@0 342 method->set_guaranteed_monitor_matching();
duke@0 343 _balanced_monitors = true;
duke@0 344 }
duke@0 345 return true;
duke@0 346 }
duke@0 347
duke@0 348
duke@0 349 // ------------------------------------------------------------------
duke@0 350 // ciMethod::get_flow_analysis
duke@0 351 ciTypeFlow* ciMethod::get_flow_analysis() {
twisti@1616 352 #if defined(COMPILER2) || defined(SHARK)
duke@0 353 if (_flow == NULL) {
duke@0 354 ciEnv* env = CURRENT_ENV;
duke@0 355 _flow = new (env->arena()) ciTypeFlow(env, this);
duke@0 356 _flow->do_flow();
duke@0 357 }
duke@0 358 return _flow;
twisti@1616 359 #else // COMPILER2 || SHARK
duke@0 360 ShouldNotReachHere();
duke@0 361 return NULL;
twisti@1616 362 #endif // COMPILER2 || SHARK
duke@0 363 }
duke@0 364
duke@0 365
duke@0 366 // ------------------------------------------------------------------
duke@0 367 // ciMethod::get_osr_flow_analysis
duke@0 368 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
twisti@1616 369 #if defined(COMPILER2) || defined(SHARK)
duke@0 370 // OSR entry points are always place after a call bytecode of some sort
duke@0 371 assert(osr_bci >= 0, "must supply valid OSR entry point");
duke@0 372 ciEnv* env = CURRENT_ENV;
duke@0 373 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
duke@0 374 flow->do_flow();
duke@0 375 return flow;
twisti@1616 376 #else // COMPILER2 || SHARK
duke@0 377 ShouldNotReachHere();
duke@0 378 return NULL;
twisti@1616 379 #endif // COMPILER2 || SHARK
duke@0 380 }
duke@0 381
duke@0 382 // ------------------------------------------------------------------
never@991 383 // ciMethod::raw_liveness_at_bci
duke@0 384 //
duke@0 385 // Which local variables are live at a specific bci?
never@991 386 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
duke@0 387 check_is_loaded();
duke@0 388 if (_liveness == NULL) {
duke@0 389 // Create the liveness analyzer.
duke@0 390 Arena* arena = CURRENT_ENV->arena();
duke@0 391 _liveness = new (arena) MethodLiveness(arena, this);
duke@0 392 _liveness->compute_liveness();
duke@0 393 }
never@991 394 return _liveness->get_liveness_at(bci);
never@991 395 }
never@991 396
never@991 397 // ------------------------------------------------------------------
never@991 398 // ciMethod::liveness_at_bci
never@991 399 //
never@991 400 // Which local variables are live at a specific bci? When debugging
never@991 401 // will return true for all locals in some cases to improve debug
never@991 402 // information.
never@991 403 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
never@991 404 MethodLivenessResult result = raw_liveness_at_bci(bci);
kvn@780 405 if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) {
duke@0 406 // Keep all locals live for the user's edification and amusement.
duke@0 407 result.at_put_range(0, result.size(), true);
duke@0 408 }
duke@0 409 return result;
duke@0 410 }
duke@0 411
duke@0 412 // ciMethod::live_local_oops_at_bci
duke@0 413 //
duke@0 414 // find all the live oops in the locals array for a particular bci
duke@0 415 // Compute what the interpreter believes by using the interpreter
duke@0 416 // oopmap generator. This is used as a double check during osr to
duke@0 417 // guard against conservative result from MethodLiveness making us
duke@0 418 // think a dead oop is live. MethodLiveness is conservative in the
duke@0 419 // sense that it may consider locals to be live which cannot be live,
duke@0 420 // like in the case where a local could contain an oop or a primitive
duke@0 421 // along different paths. In that case the local must be dead when
duke@0 422 // those paths merge. Since the interpreter's viewpoint is used when
duke@0 423 // gc'ing an interpreter frame we need to use its viewpoint during
duke@0 424 // OSR when loading the locals.
duke@0 425
duke@0 426 BitMap ciMethod::live_local_oops_at_bci(int bci) {
duke@0 427 VM_ENTRY_MARK;
duke@0 428 InterpreterOopMap mask;
duke@0 429 OopMapCache::compute_one_oop_map(get_methodOop(), bci, &mask);
duke@0 430 int mask_size = max_locals();
duke@0 431 BitMap result(mask_size);
duke@0 432 result.clear();
duke@0 433 int i;
duke@0 434 for (i = 0; i < mask_size ; i++ ) {
duke@0 435 if (mask.is_oop(i)) result.set_bit(i);
duke@0 436 }
duke@0 437 return result;
duke@0 438 }
duke@0 439
duke@0 440
duke@0 441 #ifdef COMPILER1
duke@0 442 // ------------------------------------------------------------------
duke@0 443 // ciMethod::bci_block_start
duke@0 444 //
duke@0 445 // Marks all bcis where a new basic block starts
duke@0 446 const BitMap ciMethod::bci_block_start() {
duke@0 447 check_is_loaded();
duke@0 448 if (_liveness == NULL) {
duke@0 449 // Create the liveness analyzer.
duke@0 450 Arena* arena = CURRENT_ENV->arena();
duke@0 451 _liveness = new (arena) MethodLiveness(arena, this);
duke@0 452 _liveness->compute_liveness();
duke@0 453 }
duke@0 454
duke@0 455 return _liveness->get_bci_block_start();
duke@0 456 }
duke@0 457 #endif // COMPILER1
duke@0 458
duke@0 459
duke@0 460 // ------------------------------------------------------------------
duke@0 461 // ciMethod::call_profile_at_bci
duke@0 462 //
duke@0 463 // Get the ciCallProfile for the invocation of this method.
duke@0 464 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
duke@0 465 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
duke@0 466 ResourceMark rm;
duke@0 467 ciCallProfile result;
duke@0 468 if (method_data() != NULL && method_data()->is_mature()) {
duke@0 469 ciProfileData* data = method_data()->bci_to_data(bci);
duke@0 470 if (data != NULL && data->is_CounterData()) {
duke@0 471 // Every profiled call site has a counter.
duke@0 472 int count = data->as_CounterData()->count();
duke@0 473
duke@0 474 if (!data->is_ReceiverTypeData()) {
duke@0 475 result._receiver_count[0] = 0; // that's a definite zero
duke@0 476 } else { // ReceiverTypeData is a subclass of CounterData
duke@0 477 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
duke@0 478 // In addition, virtual call sites have receiver type information
duke@0 479 int receivers_count_total = 0;
duke@0 480 int morphism = 0;
iveresov@1707 481 // Precompute morphism for the possible fixup
duke@0 482 for (uint i = 0; i < call->row_limit(); i++) {
duke@0 483 ciKlass* receiver = call->receiver(i);
duke@0 484 if (receiver == NULL) continue;
iveresov@1707 485 morphism++;
iveresov@1707 486 }
iveresov@1707 487 int epsilon = 0;
iveresov@1707 488 if (TieredCompilation && ProfileInterpreter) {
iveresov@1707 489 // Interpreter and C1 treat final and special invokes differently.
iveresov@1707 490 // C1 will record a type, whereas the interpreter will just
iveresov@1707 491 // increment the count. Detect this case.
iveresov@1707 492 if (morphism == 1 && count > 0) {
iveresov@1707 493 epsilon = count;
iveresov@1707 494 count = 0;
iveresov@1707 495 }
iveresov@1707 496 }
iveresov@1707 497 for (uint i = 0; i < call->row_limit(); i++) {
iveresov@1707 498 ciKlass* receiver = call->receiver(i);
iveresov@1707 499 if (receiver == NULL) continue;
iveresov@1707 500 int rcount = call->receiver_count(i) + epsilon;
duke@0 501 if (rcount == 0) rcount = 1; // Should be valid value
duke@0 502 receivers_count_total += rcount;
duke@0 503 // Add the receiver to result data.
duke@0 504 result.add_receiver(receiver, rcount);
duke@0 505 // If we extend profiling to record methods,
duke@0 506 // we will set result._method also.
duke@0 507 }
duke@0 508 // Determine call site's morphism.
kvn@1206 509 // The call site count is 0 with known morphism (onlt 1 or 2 receivers)
kvn@1206 510 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof.
kvn@1206 511 // The call site count is > 0 in the case of a polymorphic virtual call.
kvn@1206 512 if (morphism > 0 && morphism == result._limit) {
kvn@1206 513 // The morphism <= MorphismLimit.
kvn@1206 514 if ((morphism < ciCallProfile::MorphismLimit) ||
kvn@1206 515 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
kvn@1206 516 #ifdef ASSERT
kvn@1206 517 if (count > 0) {
kvn@1251 518 this->print_short_name(tty);
kvn@1251 519 tty->print_cr(" @ bci:%d", bci);
kvn@1206 520 this->print_codes();
kvn@1206 521 assert(false, "this call site should not be polymorphic");
kvn@1206 522 }
kvn@1206 523 #endif
duke@0 524 result._morphism = morphism;
duke@0 525 }
duke@0 526 }
duke@0 527 // Make the count consistent if this is a call profile. If count is
duke@0 528 // zero or less, presume that this is a typecheck profile and
duke@0 529 // do nothing. Otherwise, increase count to be the sum of all
duke@0 530 // receiver's counts.
kvn@1206 531 if (count >= 0) {
kvn@1206 532 count += receivers_count_total;
duke@0 533 }
duke@0 534 }
duke@0 535 result._count = count;
duke@0 536 }
duke@0 537 }
duke@0 538 return result;
duke@0 539 }
duke@0 540
duke@0 541 // ------------------------------------------------------------------
duke@0 542 // Add new receiver and sort data by receiver's profile count.
duke@0 543 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
duke@0 544 // Add new receiver and sort data by receiver's counts when we have space
duke@0 545 // for it otherwise replace the less called receiver (less called receiver
duke@0 546 // is placed to the last array element which is not used).
duke@0 547 // First array's element contains most called receiver.
duke@0 548 int i = _limit;
duke@0 549 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
duke@0 550 _receiver[i] = _receiver[i-1];
duke@0 551 _receiver_count[i] = _receiver_count[i-1];
duke@0 552 }
duke@0 553 _receiver[i] = receiver;
duke@0 554 _receiver_count[i] = receiver_count;
duke@0 555 if (_limit < MorphismLimit) _limit++;
duke@0 556 }
duke@0 557
duke@0 558 // ------------------------------------------------------------------
duke@0 559 // ciMethod::find_monomorphic_target
duke@0 560 //
duke@0 561 // Given a certain calling environment, find the monomorphic target
duke@0 562 // for the call. Return NULL if the call is not monomorphic in
duke@0 563 // its calling environment, or if there are only abstract methods.
duke@0 564 // The returned method is never abstract.
duke@0 565 // Note: If caller uses a non-null result, it must inform dependencies
duke@0 566 // via assert_unique_concrete_method or assert_leaf_type.
duke@0 567 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
duke@0 568 ciInstanceKlass* callee_holder,
duke@0 569 ciInstanceKlass* actual_recv) {
duke@0 570 check_is_loaded();
duke@0 571
duke@0 572 if (actual_recv->is_interface()) {
duke@0 573 // %%% We cannot trust interface types, yet. See bug 6312651.
duke@0 574 return NULL;
duke@0 575 }
duke@0 576
duke@0 577 ciMethod* root_m = resolve_invoke(caller, actual_recv);
duke@0 578 if (root_m == NULL) {
duke@0 579 // Something went wrong looking up the actual receiver method.
duke@0 580 return NULL;
duke@0 581 }
duke@0 582 assert(!root_m->is_abstract(), "resolve_invoke promise");
duke@0 583
duke@0 584 // Make certain quick checks even if UseCHA is false.
duke@0 585
duke@0 586 // Is it private or final?
duke@0 587 if (root_m->can_be_statically_bound()) {
duke@0 588 return root_m;
duke@0 589 }
duke@0 590
duke@0 591 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
duke@0 592 // Easy case. There is no other place to put a method, so don't bother
duke@0 593 // to go through the VM_ENTRY_MARK and all the rest.
duke@0 594 return root_m;
duke@0 595 }
duke@0 596
duke@0 597 // Array methods (clone, hashCode, etc.) are always statically bound.
duke@0 598 // If we were to see an array type here, we'd return root_m.
duke@0 599 // However, this method processes only ciInstanceKlasses. (See 4962591.)
duke@0 600 // The inline_native_clone intrinsic narrows Object to T[] properly,
duke@0 601 // so there is no need to do the same job here.
duke@0 602
duke@0 603 if (!UseCHA) return NULL;
duke@0 604
duke@0 605 VM_ENTRY_MARK;
duke@0 606
duke@0 607 methodHandle target;
duke@0 608 {
duke@0 609 MutexLocker locker(Compile_lock);
duke@0 610 klassOop context = actual_recv->get_klassOop();
duke@0 611 target = Dependencies::find_unique_concrete_method(context,
duke@0 612 root_m->get_methodOop());
duke@0 613 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
duke@0 614 }
duke@0 615
duke@0 616 #ifndef PRODUCT
duke@0 617 if (TraceDependencies && target() != NULL && target() != root_m->get_methodOop()) {
duke@0 618 tty->print("found a non-root unique target method");
duke@0 619 tty->print_cr(" context = %s", instanceKlass::cast(actual_recv->get_klassOop())->external_name());
duke@0 620 tty->print(" method = ");
duke@0 621 target->print_short_name(tty);
duke@0 622 tty->cr();
duke@0 623 }
duke@0 624 #endif //PRODUCT
duke@0 625
duke@0 626 if (target() == NULL) {
duke@0 627 return NULL;
duke@0 628 }
duke@0 629 if (target() == root_m->get_methodOop()) {
duke@0 630 return root_m;
duke@0 631 }
duke@0 632 if (!root_m->is_public() &&
duke@0 633 !root_m->is_protected()) {
duke@0 634 // If we are going to reason about inheritance, it's easiest
duke@0 635 // if the method in question is public, protected, or private.
duke@0 636 // If the answer is not root_m, it is conservatively correct
duke@0 637 // to return NULL, even if the CHA encountered irrelevant
duke@0 638 // methods in other packages.
duke@0 639 // %%% TO DO: Work out logic for package-private methods
duke@0 640 // with the same name but different vtable indexes.
duke@0 641 return NULL;
duke@0 642 }
duke@0 643 return CURRENT_THREAD_ENV->get_object(target())->as_method();
duke@0 644 }
duke@0 645
duke@0 646 // ------------------------------------------------------------------
duke@0 647 // ciMethod::resolve_invoke
duke@0 648 //
duke@0 649 // Given a known receiver klass, find the target for the call.
duke@0 650 // Return NULL if the call has no target or the target is abstract.
duke@0 651 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) {
duke@0 652 check_is_loaded();
duke@0 653 VM_ENTRY_MARK;
duke@0 654
duke@0 655 KlassHandle caller_klass (THREAD, caller->get_klassOop());
duke@0 656 KlassHandle h_recv (THREAD, exact_receiver->get_klassOop());
duke@0 657 KlassHandle h_resolved (THREAD, holder()->get_klassOop());
coleenp@2069 658 Symbol* h_name = name()->get_symbol();
coleenp@2069 659 Symbol* h_signature = signature()->get_symbol();
duke@0 660
duke@0 661 methodHandle m;
duke@0 662 // Only do exact lookup if receiver klass has been linked. Otherwise,
duke@0 663 // the vtable has not been setup, and the LinkResolver will fail.
duke@0 664 if (h_recv->oop_is_javaArray()
duke@0 665 ||
duke@0 666 instanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) {
duke@0 667 if (holder()->is_interface()) {
duke@0 668 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
duke@0 669 } else {
duke@0 670 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
duke@0 671 }
duke@0 672 }
duke@0 673
duke@0 674 if (m.is_null()) {
duke@0 675 // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
duke@0 676 return NULL;
duke@0 677 }
duke@0 678
duke@0 679 ciMethod* result = this;
duke@0 680 if (m() != get_methodOop()) {
duke@0 681 result = CURRENT_THREAD_ENV->get_object(m())->as_method();
duke@0 682 }
duke@0 683
duke@0 684 // Don't return abstract methods because they aren't
duke@0 685 // optimizable or interesting.
duke@0 686 if (result->is_abstract()) {
duke@0 687 return NULL;
duke@0 688 } else {
duke@0 689 return result;
duke@0 690 }
duke@0 691 }
duke@0 692
duke@0 693 // ------------------------------------------------------------------
duke@0 694 // ciMethod::resolve_vtable_index
duke@0 695 //
duke@0 696 // Given a known receiver klass, find the vtable index for the call.
duke@0 697 // Return methodOopDesc::invalid_vtable_index if the vtable_index is unknown.
duke@0 698 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
duke@0 699 check_is_loaded();
duke@0 700
duke@0 701 int vtable_index = methodOopDesc::invalid_vtable_index;
duke@0 702 // Only do lookup if receiver klass has been linked. Otherwise,
duke@0 703 // the vtable has not been setup, and the LinkResolver will fail.
duke@0 704 if (!receiver->is_interface()
duke@0 705 && (!receiver->is_instance_klass() ||
duke@0 706 receiver->as_instance_klass()->is_linked())) {
duke@0 707 VM_ENTRY_MARK;
duke@0 708
duke@0 709 KlassHandle caller_klass (THREAD, caller->get_klassOop());
duke@0 710 KlassHandle h_recv (THREAD, receiver->get_klassOop());
coleenp@2069 711 Symbol* h_name = name()->get_symbol();
coleenp@2069 712 Symbol* h_signature = signature()->get_symbol();
duke@0 713
duke@0 714 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass);
duke@0 715 if (vtable_index == methodOopDesc::nonvirtual_vtable_index) {
duke@0 716 // A statically bound method. Return "no such index".
duke@0 717 vtable_index = methodOopDesc::invalid_vtable_index;
duke@0 718 }
duke@0 719 }
duke@0 720
duke@0 721 return vtable_index;
duke@0 722 }
duke@0 723
duke@0 724 // ------------------------------------------------------------------
duke@0 725 // ciMethod::interpreter_call_site_count
duke@0 726 int ciMethod::interpreter_call_site_count(int bci) {
duke@0 727 if (method_data() != NULL) {
duke@0 728 ResourceMark rm;
duke@0 729 ciProfileData* data = method_data()->bci_to_data(bci);
duke@0 730 if (data != NULL && data->is_CounterData()) {
duke@0 731 return scale_count(data->as_CounterData()->count());
duke@0 732 }
duke@0 733 }
duke@0 734 return -1; // unknown
duke@0 735 }
duke@0 736
duke@0 737 // ------------------------------------------------------------------
duke@0 738 // Adjust a CounterData count to be commensurate with
duke@0 739 // interpreter_invocation_count. If the MDO exists for
duke@0 740 // only 25% of the time the method exists, then the
duke@0 741 // counts in the MDO should be scaled by 4X, so that
duke@0 742 // they can be usefully and stably compared against the
duke@0 743 // invocation counts in methods.
duke@0 744 int ciMethod::scale_count(int count, float prof_factor) {
duke@0 745 if (count > 0 && method_data() != NULL) {
iveresov@1707 746 int counter_life;
duke@0 747 int method_life = interpreter_invocation_count();
iveresov@1707 748 if (TieredCompilation) {
iveresov@1707 749 // In tiered the MDO's life is measured directly, so just use the snapshotted counters
iveresov@1707 750 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
iveresov@1707 751 } else {
iveresov@1707 752 int current_mileage = method_data()->current_mileage();
iveresov@1707 753 int creation_mileage = method_data()->creation_mileage();
iveresov@1707 754 counter_life = current_mileage - creation_mileage;
iveresov@1707 755 }
iveresov@1707 756
duke@0 757 // counter_life due to backedge_counter could be > method_life
duke@0 758 if (counter_life > method_life)
duke@0 759 counter_life = method_life;
duke@0 760 if (0 < counter_life && counter_life <= method_life) {
duke@0 761 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
duke@0 762 count = (count > 0) ? count : 1;
duke@0 763 }
duke@0 764 }
duke@0 765 return count;
duke@0 766 }
duke@0 767
duke@0 768 // ------------------------------------------------------------------
jrose@710 769 // invokedynamic support
twisti@1485 770
twisti@1485 771 // ------------------------------------------------------------------
twisti@1485 772 // ciMethod::is_method_handle_invoke
jrose@710 773 //
jrose@1585 774 // Return true if the method is an instance of one of the two
jrose@1585 775 // signature-polymorphic MethodHandle methods, invokeExact or invokeGeneric.
twisti@1137 776 bool ciMethod::is_method_handle_invoke() const {
twisti@1743 777 if (!is_loaded()) {
jrose@2212 778 bool flag = (holder()->name() == ciSymbol::java_lang_invoke_MethodHandle() &&
twisti@1743 779 methodOopDesc::is_method_handle_invoke_name(name()->sid()));
twisti@1743 780 return flag;
twisti@1743 781 }
jrose@1585 782 VM_ENTRY_MARK;
jrose@1585 783 return get_methodOop()->is_method_handle_invoke();
jrose@710 784 }
jrose@710 785
twisti@1485 786 // ------------------------------------------------------------------
twisti@1485 787 // ciMethod::is_method_handle_adapter
twisti@1485 788 //
twisti@1485 789 // Return true if the method is a generated MethodHandle adapter.
jrose@1585 790 // These are built by MethodHandleCompiler.
twisti@1152 791 bool ciMethod::is_method_handle_adapter() const {
jrose@1585 792 if (!is_loaded()) return false;
twisti@1152 793 VM_ENTRY_MARK;
twisti@1152 794 return get_methodOop()->is_method_handle_adapter();
twisti@1152 795 }
twisti@1152 796
jrose@710 797 ciInstance* ciMethod::method_handle_type() {
jrose@710 798 check_is_loaded();
jrose@710 799 VM_ENTRY_MARK;
jrose@710 800 oop mtype = get_methodOop()->method_handle_type();
jrose@710 801 return CURRENT_THREAD_ENV->get_object(mtype)->as_instance();
jrose@710 802 }
jrose@710 803
jrose@710 804
jrose@710 805 // ------------------------------------------------------------------
iveresov@1920 806 // ciMethod::ensure_method_data
duke@0 807 //
duke@0 808 // Generate new methodDataOop objects at compile time.
iveresov@1920 809 // Return true if allocation was successful or no MDO is required.
iveresov@1920 810 bool ciMethod::ensure_method_data(methodHandle h_m) {
duke@0 811 EXCEPTION_CONTEXT;
iveresov@1920 812 if (is_native() || is_abstract() || h_m()->is_accessor()) return true;
duke@0 813 if (h_m()->method_data() == NULL) {
duke@0 814 methodOopDesc::build_interpreter_method_data(h_m, THREAD);
duke@0 815 if (HAS_PENDING_EXCEPTION) {
duke@0 816 CLEAR_PENDING_EXCEPTION;
duke@0 817 }
duke@0 818 }
duke@0 819 if (h_m()->method_data() != NULL) {
duke@0 820 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data();
duke@0 821 _method_data->load_data();
iveresov@1920 822 return true;
duke@0 823 } else {
duke@0 824 _method_data = CURRENT_ENV->get_empty_methodData();
iveresov@1920 825 return false;
duke@0 826 }
duke@0 827 }
duke@0 828
duke@0 829 // public, retroactive version
iveresov@1920 830 bool ciMethod::ensure_method_data() {
iveresov@1920 831 bool result = true;
duke@0 832 if (_method_data == NULL || _method_data->is_empty()) {
duke@0 833 GUARDED_VM_ENTRY({
iveresov@1920 834 result = ensure_method_data(get_methodOop());
duke@0 835 });
duke@0 836 }
iveresov@1920 837 return result;
duke@0 838 }
duke@0 839
duke@0 840
duke@0 841 // ------------------------------------------------------------------
duke@0 842 // ciMethod::method_data
duke@0 843 //
duke@0 844 ciMethodData* ciMethod::method_data() {
duke@0 845 if (_method_data != NULL) {
duke@0 846 return _method_data;
duke@0 847 }
duke@0 848 VM_ENTRY_MARK;
duke@0 849 ciEnv* env = CURRENT_ENV;
duke@0 850 Thread* my_thread = JavaThread::current();
duke@0 851 methodHandle h_m(my_thread, get_methodOop());
duke@0 852
duke@0 853 if (h_m()->method_data() != NULL) {
duke@0 854 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data();
duke@0 855 _method_data->load_data();
duke@0 856 } else {
duke@0 857 _method_data = CURRENT_ENV->get_empty_methodData();
duke@0 858 }
duke@0 859 return _method_data;
duke@0 860
duke@0 861 }
duke@0 862
iveresov@1920 863 // ------------------------------------------------------------------
iveresov@1920 864 // ciMethod::method_data_or_null
iveresov@1920 865 // Returns a pointer to ciMethodData if MDO exists on the VM side,
iveresov@1920 866 // NULL otherwise.
iveresov@1920 867 ciMethodData* ciMethod::method_data_or_null() {
iveresov@1920 868 ciMethodData *md = method_data();
iveresov@1920 869 if (md->is_empty()) return NULL;
iveresov@1920 870 return md;
iveresov@1920 871 }
duke@0 872
duke@0 873 // ------------------------------------------------------------------
duke@0 874 // ciMethod::will_link
duke@0 875 //
duke@0 876 // Will this method link in a specific calling context?
duke@0 877 bool ciMethod::will_link(ciKlass* accessing_klass,
duke@0 878 ciKlass* declared_method_holder,
duke@0 879 Bytecodes::Code bc) {
duke@0 880 if (!is_loaded()) {
duke@0 881 // Method lookup failed.
duke@0 882 return false;
duke@0 883 }
duke@0 884
duke@0 885 // The link checks have been front-loaded into the get_method
duke@0 886 // call. This method (ciMethod::will_link()) will be removed
duke@0 887 // in the future.
duke@0 888
duke@0 889 return true;
duke@0 890 }
duke@0 891
duke@0 892 // ------------------------------------------------------------------
duke@0 893 // ciMethod::should_exclude
duke@0 894 //
duke@0 895 // Should this method be excluded from compilation?
duke@0 896 bool ciMethod::should_exclude() {
duke@0 897 check_is_loaded();
duke@0 898 VM_ENTRY_MARK;
duke@0 899 methodHandle mh(THREAD, get_methodOop());
duke@0 900 bool ignore;
duke@0 901 return CompilerOracle::should_exclude(mh, ignore);
duke@0 902 }
duke@0 903
duke@0 904 // ------------------------------------------------------------------
duke@0 905 // ciMethod::should_inline
duke@0 906 //
duke@0 907 // Should this method be inlined during compilation?
duke@0 908 bool ciMethod::should_inline() {
duke@0 909 check_is_loaded();
duke@0 910 VM_ENTRY_MARK;
duke@0 911 methodHandle mh(THREAD, get_methodOop());
duke@0 912 return CompilerOracle::should_inline(mh);
duke@0 913 }
duke@0 914
duke@0 915 // ------------------------------------------------------------------
duke@0 916 // ciMethod::should_not_inline
duke@0 917 //
duke@0 918 // Should this method be disallowed from inlining during compilation?
duke@0 919 bool ciMethod::should_not_inline() {
duke@0 920 check_is_loaded();
duke@0 921 VM_ENTRY_MARK;
duke@0 922 methodHandle mh(THREAD, get_methodOop());
duke@0 923 return CompilerOracle::should_not_inline(mh);
duke@0 924 }
duke@0 925
duke@0 926 // ------------------------------------------------------------------
duke@0 927 // ciMethod::should_print_assembly
duke@0 928 //
duke@0 929 // Should the compiler print the generated code for this method?
duke@0 930 bool ciMethod::should_print_assembly() {
duke@0 931 check_is_loaded();
duke@0 932 VM_ENTRY_MARK;
duke@0 933 methodHandle mh(THREAD, get_methodOop());
duke@0 934 return CompilerOracle::should_print(mh);
duke@0 935 }
duke@0 936
duke@0 937 // ------------------------------------------------------------------
duke@0 938 // ciMethod::break_at_execute
duke@0 939 //
duke@0 940 // Should the compiler insert a breakpoint into the generated code
duke@0 941 // method?
duke@0 942 bool ciMethod::break_at_execute() {
duke@0 943 check_is_loaded();
duke@0 944 VM_ENTRY_MARK;
duke@0 945 methodHandle mh(THREAD, get_methodOop());
duke@0 946 return CompilerOracle::should_break_at(mh);
duke@0 947 }
duke@0 948
duke@0 949 // ------------------------------------------------------------------
duke@0 950 // ciMethod::has_option
duke@0 951 //
duke@0 952 bool ciMethod::has_option(const char* option) {
duke@0 953 check_is_loaded();
duke@0 954 VM_ENTRY_MARK;
duke@0 955 methodHandle mh(THREAD, get_methodOop());
duke@0 956 return CompilerOracle::has_option_string(mh, option);
duke@0 957 }
duke@0 958
duke@0 959 // ------------------------------------------------------------------
duke@0 960 // ciMethod::can_be_compiled
duke@0 961 //
duke@0 962 // Have previous compilations of this method succeeded?
duke@0 963 bool ciMethod::can_be_compiled() {
duke@0 964 check_is_loaded();
iveresov@1707 965 ciEnv* env = CURRENT_ENV;
iveresov@1707 966 if (is_c1_compile(env->comp_level())) {
iveresov@1707 967 return _is_c1_compilable;
iveresov@1707 968 }
iveresov@1707 969 return _is_c2_compilable;
duke@0 970 }
duke@0 971
duke@0 972 // ------------------------------------------------------------------
duke@0 973 // ciMethod::set_not_compilable
duke@0 974 //
duke@0 975 // Tell the VM that this method cannot be compiled at all.
duke@0 976 void ciMethod::set_not_compilable() {
duke@0 977 check_is_loaded();
duke@0 978 VM_ENTRY_MARK;
iveresov@1707 979 ciEnv* env = CURRENT_ENV;
iveresov@1707 980 if (is_c1_compile(env->comp_level())) {
iveresov@1707 981 _is_c1_compilable = false;
iveresov@1707 982 } else {
iveresov@1707 983 _is_c2_compilable = false;
iveresov@1707 984 }
iveresov@1707 985 get_methodOop()->set_not_compilable(env->comp_level());
duke@0 986 }
duke@0 987
duke@0 988 // ------------------------------------------------------------------
duke@0 989 // ciMethod::can_be_osr_compiled
duke@0 990 //
duke@0 991 // Have previous compilations of this method succeeded?
duke@0 992 //
duke@0 993 // Implementation note: the VM does not currently keep track
duke@0 994 // of failed OSR compilations per bci. The entry_bci parameter
duke@0 995 // is currently unused.
duke@0 996 bool ciMethod::can_be_osr_compiled(int entry_bci) {
duke@0 997 check_is_loaded();
duke@0 998 VM_ENTRY_MARK;
iveresov@1707 999 ciEnv* env = CURRENT_ENV;
iveresov@1707 1000 return !get_methodOop()->is_not_osr_compilable(env->comp_level());
duke@0 1001 }
duke@0 1002
duke@0 1003 // ------------------------------------------------------------------
duke@0 1004 // ciMethod::has_compiled_code
duke@0 1005 bool ciMethod::has_compiled_code() {
duke@0 1006 VM_ENTRY_MARK;
duke@0 1007 return get_methodOop()->code() != NULL;
duke@0 1008 }
duke@0 1009
iveresov@1707 1010 int ciMethod::comp_level() {
iveresov@1707 1011 check_is_loaded();
iveresov@1707 1012 VM_ENTRY_MARK;
iveresov@1707 1013 nmethod* nm = get_methodOop()->code();
iveresov@1707 1014 if (nm != NULL) return nm->comp_level();
iveresov@1707 1015 return 0;
iveresov@1707 1016 }
iveresov@1707 1017
iveresov@2563 1018 int ciMethod::highest_osr_comp_level() {
iveresov@2563 1019 check_is_loaded();
iveresov@2563 1020 VM_ENTRY_MARK;
iveresov@2563 1021 return get_methodOop()->highest_osr_comp_level();
iveresov@2563 1022 }
iveresov@2563 1023
duke@0 1024 // ------------------------------------------------------------------
twisti@2672 1025 // ciMethod::code_size_for_inlining
twisti@2672 1026 //
twisti@2672 1027 // Code size for inlining decisions.
twisti@2672 1028 //
twisti@2672 1029 // Don't fully count method handle adapters against inlining budgets:
twisti@2672 1030 // the metric we use here is the number of call sites in the adapter
twisti@2672 1031 // as they are probably the instructions which generate some code.
twisti@2672 1032 int ciMethod::code_size_for_inlining() {
twisti@2672 1033 check_is_loaded();
twisti@2672 1034
twisti@2672 1035 // Method handle adapters
twisti@2672 1036 if (is_method_handle_adapter()) {
twisti@2672 1037 // Count call sites
twisti@2672 1038 int call_site_count = 0;
twisti@2672 1039 ciBytecodeStream iter(this);
twisti@2672 1040 while (iter.next() != ciBytecodeStream::EOBC()) {
twisti@2672 1041 if (Bytecodes::is_invoke(iter.cur_bc())) {
twisti@2672 1042 call_site_count++;
twisti@2672 1043 }
twisti@2672 1044 }
twisti@2672 1045 return call_site_count;
twisti@2672 1046 }
twisti@2672 1047
twisti@2672 1048 // Normal method
twisti@2672 1049 return code_size();
twisti@2672 1050 }
twisti@2672 1051
twisti@2672 1052 // ------------------------------------------------------------------
duke@0 1053 // ciMethod::instructions_size
twisti@1672 1054 //
twisti@1672 1055 // This is a rough metric for "fat" methods, compared before inlining
twisti@1672 1056 // with InlineSmallCode. The CodeBlob::code_size accessor includes
twisti@1672 1057 // junk like exception handler, stubs, and constant table, which are
twisti@1672 1058 // not highly relevant to an inlined method. So we use the more
twisti@1672 1059 // specific accessor nmethod::insts_size.
iveresov@1707 1060 int ciMethod::instructions_size(int comp_level) {
duke@0 1061 GUARDED_VM_ENTRY(
duke@0 1062 nmethod* code = get_methodOop()->code();
iveresov@1707 1063 if (code != NULL && (comp_level == CompLevel_any || comp_level == code->comp_level())) {
iveresov@1753 1064 return code->insts_end() - code->verified_entry_point();
duke@0 1065 }
iveresov@1707 1066 return 0;
duke@0 1067 )
duke@0 1068 }
duke@0 1069
duke@0 1070 // ------------------------------------------------------------------
duke@0 1071 // ciMethod::log_nmethod_identity
duke@0 1072 void ciMethod::log_nmethod_identity(xmlStream* log) {
duke@0 1073 GUARDED_VM_ENTRY(
duke@0 1074 nmethod* code = get_methodOop()->code();
duke@0 1075 if (code != NULL) {
duke@0 1076 code->log_identity(log);
duke@0 1077 }
duke@0 1078 )
duke@0 1079 }
duke@0 1080
duke@0 1081 // ------------------------------------------------------------------
duke@0 1082 // ciMethod::is_not_reached
duke@0 1083 bool ciMethod::is_not_reached(int bci) {
duke@0 1084 check_is_loaded();
duke@0 1085 VM_ENTRY_MARK;
duke@0 1086 return Interpreter::is_not_reached(
duke@0 1087 methodHandle(THREAD, get_methodOop()), bci);
duke@0 1088 }
duke@0 1089
duke@0 1090 // ------------------------------------------------------------------
duke@0 1091 // ciMethod::was_never_executed
duke@0 1092 bool ciMethod::was_executed_more_than(int times) {
duke@0 1093 VM_ENTRY_MARK;
duke@0 1094 return get_methodOop()->was_executed_more_than(times);
duke@0 1095 }
duke@0 1096
duke@0 1097 // ------------------------------------------------------------------
duke@0 1098 // ciMethod::has_unloaded_classes_in_signature
duke@0 1099 bool ciMethod::has_unloaded_classes_in_signature() {
duke@0 1100 VM_ENTRY_MARK;
duke@0 1101 {
duke@0 1102 EXCEPTION_MARK;
duke@0 1103 methodHandle m(THREAD, get_methodOop());
duke@0 1104 bool has_unloaded = methodOopDesc::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
duke@0 1105 if( HAS_PENDING_EXCEPTION ) {
duke@0 1106 CLEAR_PENDING_EXCEPTION;
duke@0 1107 return true; // Declare that we may have unloaded classes
duke@0 1108 }
duke@0 1109 return has_unloaded;
duke@0 1110 }
duke@0 1111 }
duke@0 1112
duke@0 1113 // ------------------------------------------------------------------
duke@0 1114 // ciMethod::is_klass_loaded
duke@0 1115 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
duke@0 1116 VM_ENTRY_MARK;
duke@0 1117 return get_methodOop()->is_klass_loaded(refinfo_index, must_be_resolved);
duke@0 1118 }
duke@0 1119
duke@0 1120 // ------------------------------------------------------------------
duke@0 1121 // ciMethod::check_call
duke@0 1122 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
duke@0 1123 VM_ENTRY_MARK;
duke@0 1124 {
duke@0 1125 EXCEPTION_MARK;
duke@0 1126 HandleMark hm(THREAD);
duke@0 1127 constantPoolHandle pool (THREAD, get_methodOop()->constants());
duke@0 1128 methodHandle spec_method;
duke@0 1129 KlassHandle spec_klass;
duke@0 1130 LinkResolver::resolve_method(spec_method, spec_klass, pool, refinfo_index, THREAD);
duke@0 1131 if (HAS_PENDING_EXCEPTION) {
duke@0 1132 CLEAR_PENDING_EXCEPTION;
duke@0 1133 return false;
duke@0 1134 } else {
duke@0 1135 return (spec_method->is_static() == is_static);
duke@0 1136 }
duke@0 1137 }
duke@0 1138 return false;
duke@0 1139 }
duke@0 1140
duke@0 1141 // ------------------------------------------------------------------
duke@0 1142 // ciMethod::print_codes
duke@0 1143 //
duke@0 1144 // Print the bytecodes for this method.
duke@0 1145 void ciMethod::print_codes_on(outputStream* st) {
duke@0 1146 check_is_loaded();
duke@0 1147 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(st);)
duke@0 1148 }
duke@0 1149
duke@0 1150
duke@0 1151 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
duke@0 1152 check_is_loaded(); \
duke@0 1153 VM_ENTRY_MARK; \
duke@0 1154 return get_methodOop()->flag_accessor(); \
duke@0 1155 }
duke@0 1156
duke@0 1157 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); }
duke@0 1158 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
duke@0 1159 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
duke@0 1160 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
duke@0 1161 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
duke@0 1162 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); }
duke@0 1163
duke@0 1164 BCEscapeAnalyzer *ciMethod::get_bcea() {
kvn@1570 1165 #ifdef COMPILER2
duke@0 1166 if (_bcea == NULL) {
duke@0 1167 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
duke@0 1168 }
duke@0 1169 return _bcea;
kvn@1570 1170 #else // COMPILER2
kvn@1570 1171 ShouldNotReachHere();
kvn@1570 1172 return NULL;
kvn@1570 1173 #endif // COMPILER2
duke@0 1174 }
duke@0 1175
duke@0 1176 ciMethodBlocks *ciMethod::get_method_blocks() {
duke@0 1177 Arena *arena = CURRENT_ENV->arena();
duke@0 1178 if (_method_blocks == NULL) {
duke@0 1179 _method_blocks = new (arena) ciMethodBlocks(arena, this);
duke@0 1180 }
duke@0 1181 return _method_blocks;
duke@0 1182 }
duke@0 1183
duke@0 1184 #undef FETCH_FLAG_FROM_VM
duke@0 1185
duke@0 1186
duke@0 1187 // ------------------------------------------------------------------
duke@0 1188 // ciMethod::print_codes
duke@0 1189 //
duke@0 1190 // Print a range of the bytecodes for this method.
duke@0 1191 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
duke@0 1192 check_is_loaded();
duke@0 1193 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(from, to, st);)
duke@0 1194 }
duke@0 1195
duke@0 1196 // ------------------------------------------------------------------
duke@0 1197 // ciMethod::print_name
duke@0 1198 //
duke@0 1199 // Print the name of this method, including signature and some flags.
duke@0 1200 void ciMethod::print_name(outputStream* st) {
duke@0 1201 check_is_loaded();
duke@0 1202 GUARDED_VM_ENTRY(get_methodOop()->print_name(st);)
duke@0 1203 }
duke@0 1204
duke@0 1205 // ------------------------------------------------------------------
duke@0 1206 // ciMethod::print_short_name
duke@0 1207 //
duke@0 1208 // Print the name of this method, without signature.
duke@0 1209 void ciMethod::print_short_name(outputStream* st) {
duke@0 1210 check_is_loaded();
duke@0 1211 GUARDED_VM_ENTRY(get_methodOop()->print_short_name(st);)
duke@0 1212 }
duke@0 1213
duke@0 1214 // ------------------------------------------------------------------
duke@0 1215 // ciMethod::print_impl
duke@0 1216 //
duke@0 1217 // Implementation of the print method.
duke@0 1218 void ciMethod::print_impl(outputStream* st) {
duke@0 1219 ciObject::print_impl(st);
duke@0 1220 st->print(" name=");
duke@0 1221 name()->print_symbol_on(st);
duke@0 1222 st->print(" holder=");
duke@0 1223 holder()->print_name_on(st);
duke@0 1224 st->print(" signature=");
duke@0 1225 signature()->as_symbol()->print_symbol_on(st);
duke@0 1226 if (is_loaded()) {
duke@0 1227 st->print(" loaded=true flags=");
duke@0 1228 flags().print_member_flags(st);
duke@0 1229 } else {
duke@0 1230 st->print(" loaded=false");
duke@0 1231 }
duke@0 1232 }