Mercurial > hg > truffle
annotate src/share/vm/oops/methodOop.cpp @ 2021:7cf1a74771e8
6988439: Parallel Class Loading test deadlock involving MethodData_lock and Pending List Lock
Summary: Don't acquire methodData_lock while holding pending list lock
Reviewed-by: kvn, never, ysr
| author | coleenp |
|---|---|
| date | Fri, 10 Dec 2010 12:13:03 -0500 |
| parents | f95d63e2154a |
| children | 8012aa3ccede |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/systemDictionary.hpp" | |
| 27 #include "code/debugInfoRec.hpp" | |
| 28 #include "gc_interface/collectedHeap.inline.hpp" | |
| 29 #include "interpreter/bytecodeStream.hpp" | |
| 30 #include "interpreter/bytecodeTracer.hpp" | |
| 31 #include "interpreter/bytecodes.hpp" | |
| 32 #include "interpreter/interpreter.hpp" | |
| 33 #include "interpreter/oopMapCache.hpp" | |
| 34 #include "memory/gcLocker.hpp" | |
| 35 #include "memory/generation.hpp" | |
| 36 #include "memory/oopFactory.hpp" | |
| 37 #include "oops/klassOop.hpp" | |
| 38 #include "oops/methodDataOop.hpp" | |
| 39 #include "oops/methodOop.hpp" | |
| 40 #include "oops/oop.inline.hpp" | |
| 41 #include "oops/symbolOop.hpp" | |
| 42 #include "prims/jvmtiExport.hpp" | |
| 43 #include "prims/methodHandleWalk.hpp" | |
| 44 #include "prims/nativeLookup.hpp" | |
| 45 #include "runtime/arguments.hpp" | |
| 46 #include "runtime/compilationPolicy.hpp" | |
| 47 #include "runtime/frame.inline.hpp" | |
| 48 #include "runtime/handles.inline.hpp" | |
| 49 #include "runtime/relocator.hpp" | |
| 50 #include "runtime/sharedRuntime.hpp" | |
| 51 #include "runtime/signature.hpp" | |
| 52 #include "utilities/xmlstream.hpp" | |
| 0 | 53 |
| 54 | |
| 55 // Implementation of methodOopDesc | |
| 56 | |
| 57 address methodOopDesc::get_i2c_entry() { | |
| 58 assert(_adapter != NULL, "must have"); | |
| 59 return _adapter->get_i2c_entry(); | |
| 60 } | |
| 61 | |
| 62 address methodOopDesc::get_c2i_entry() { | |
| 63 assert(_adapter != NULL, "must have"); | |
| 64 return _adapter->get_c2i_entry(); | |
| 65 } | |
| 66 | |
| 67 address methodOopDesc::get_c2i_unverified_entry() { | |
| 68 assert(_adapter != NULL, "must have"); | |
| 69 return _adapter->get_c2i_unverified_entry(); | |
| 70 } | |
| 71 | |
| 72 char* methodOopDesc::name_and_sig_as_C_string() { | |
| 73 return name_and_sig_as_C_string(Klass::cast(constants()->pool_holder()), name(), signature()); | |
| 74 } | |
| 75 | |
| 76 char* methodOopDesc::name_and_sig_as_C_string(char* buf, int size) { | |
| 77 return name_and_sig_as_C_string(Klass::cast(constants()->pool_holder()), name(), signature(), buf, size); | |
| 78 } | |
| 79 | |
| 80 char* methodOopDesc::name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature) { | |
| 81 const char* klass_name = klass->external_name(); | |
| 82 int klass_name_len = (int)strlen(klass_name); | |
| 83 int method_name_len = method_name->utf8_length(); | |
| 84 int len = klass_name_len + 1 + method_name_len + signature->utf8_length(); | |
| 85 char* dest = NEW_RESOURCE_ARRAY(char, len + 1); | |
| 86 strcpy(dest, klass_name); | |
| 87 dest[klass_name_len] = '.'; | |
| 88 strcpy(&dest[klass_name_len + 1], method_name->as_C_string()); | |
| 89 strcpy(&dest[klass_name_len + 1 + method_name_len], signature->as_C_string()); | |
| 90 dest[len] = 0; | |
| 91 return dest; | |
| 92 } | |
| 93 | |
| 94 char* methodOopDesc::name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature, char* buf, int size) { | |
| 95 symbolOop klass_name = klass->name(); | |
| 96 klass_name->as_klass_external_name(buf, size); | |
| 97 int len = (int)strlen(buf); | |
| 98 | |
| 99 if (len < size - 1) { | |
| 100 buf[len++] = '.'; | |
| 101 | |
| 102 method_name->as_C_string(&(buf[len]), size - len); | |
| 103 len = (int)strlen(buf); | |
| 104 | |
| 105 signature->as_C_string(&(buf[len]), size - len); | |
| 106 } | |
| 107 | |
| 108 return buf; | |
| 109 } | |
| 110 | |
| 111 int methodOopDesc::fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS) { | |
| 112 // exception table holds quadruple entries of the form (beg_bci, end_bci, handler_bci, klass_index) | |
| 113 const int beg_bci_offset = 0; | |
| 114 const int end_bci_offset = 1; | |
| 115 const int handler_bci_offset = 2; | |
| 116 const int klass_index_offset = 3; | |
| 117 const int entry_size = 4; | |
| 118 // access exception table | |
| 119 typeArrayHandle table (THREAD, constMethod()->exception_table()); | |
| 120 int length = table->length(); | |
| 121 assert(length % entry_size == 0, "exception table format has changed"); | |
| 122 // iterate through all entries sequentially | |
| 123 constantPoolHandle pool(THREAD, constants()); | |
| 124 for (int i = 0; i < length; i += entry_size) { | |
| 125 int beg_bci = table->int_at(i + beg_bci_offset); | |
| 126 int end_bci = table->int_at(i + end_bci_offset); | |
| 127 assert(beg_bci <= end_bci, "inconsistent exception table"); | |
| 128 if (beg_bci <= throw_bci && throw_bci < end_bci) { | |
| 129 // exception handler bci range covers throw_bci => investigate further | |
| 130 int handler_bci = table->int_at(i + handler_bci_offset); | |
| 131 int klass_index = table->int_at(i + klass_index_offset); | |
| 132 if (klass_index == 0) { | |
| 133 return handler_bci; | |
| 134 } else if (ex_klass.is_null()) { | |
| 135 return handler_bci; | |
| 136 } else { | |
| 137 // we know the exception class => get the constraint class | |
| 138 // this may require loading of the constraint class; if verification | |
| 139 // fails or some other exception occurs, return handler_bci | |
| 140 klassOop k = pool->klass_at(klass_index, CHECK_(handler_bci)); | |
| 141 KlassHandle klass = KlassHandle(THREAD, k); | |
| 142 assert(klass.not_null(), "klass not loaded"); | |
| 143 if (ex_klass->is_subtype_of(klass())) { | |
| 144 return handler_bci; | |
| 145 } | |
| 146 } | |
| 147 } | |
| 148 } | |
| 149 | |
| 150 return -1; | |
| 151 } | |
| 152 | |
| 153 methodOop methodOopDesc::method_from_bcp(address bcp) { | |
| 154 debug_only(static int count = 0; count++); | |
| 155 assert(Universe::heap()->is_in_permanent(bcp), "bcp not in perm_gen"); | |
| 156 // TO DO: this may be unsafe in some configurations | |
| 157 HeapWord* p = Universe::heap()->block_start(bcp); | |
| 158 assert(Universe::heap()->block_is_obj(p), "must be obj"); | |
| 159 assert(oop(p)->is_constMethod(), "not a method"); | |
| 160 return constMethodOop(p)->method(); | |
| 161 } | |
| 162 | |
| 163 | |
| 164 void methodOopDesc::mask_for(int bci, InterpreterOopMap* mask) { | |
| 165 | |
| 166 Thread* myThread = Thread::current(); | |
| 167 methodHandle h_this(myThread, this); | |
| 168 #ifdef ASSERT | |
| 169 bool has_capability = myThread->is_VM_thread() || | |
| 170 myThread->is_ConcurrentGC_thread() || | |
| 171 myThread->is_GC_task_thread(); | |
| 172 | |
| 173 if (!has_capability) { | |
| 174 if (!VerifyStack && !VerifyLastFrame) { | |
| 175 // verify stack calls this outside VM thread | |
| 176 warning("oopmap should only be accessed by the " | |
| 177 "VM, GC task or CMS threads (or during debugging)"); | |
| 178 InterpreterOopMap local_mask; | |
| 179 instanceKlass::cast(method_holder())->mask_for(h_this, bci, &local_mask); | |
| 180 local_mask.print(); | |
| 181 } | |
| 182 } | |
| 183 #endif | |
| 184 instanceKlass::cast(method_holder())->mask_for(h_this, bci, mask); | |
| 185 return; | |
| 186 } | |
| 187 | |
| 188 | |
| 189 int methodOopDesc::bci_from(address bcp) const { | |
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190 assert(is_native() && bcp == code_base() || contains(bcp) || is_error_reported(), "bcp doesn't belong to this method"); |
| 0 | 191 return bcp - code_base(); |
| 192 } | |
| 193 | |
| 194 | |
| 195 // Return (int)bcx if it appears to be a valid BCI. | |
| 196 // Return bci_from((address)bcx) if it appears to be a valid BCP. | |
| 197 // Return -1 otherwise. | |
| 198 // Used by profiling code, when invalid data is a possibility. | |
| 199 // The caller is responsible for validating the methodOop itself. | |
| 200 int methodOopDesc::validate_bci_from_bcx(intptr_t bcx) const { | |
| 201 // keep bci as -1 if not a valid bci | |
| 202 int bci = -1; | |
| 203 if (bcx == 0 || (address)bcx == code_base()) { | |
| 204 // code_size() may return 0 and we allow 0 here | |
| 205 // the method may be native | |
| 206 bci = 0; | |
| 207 } else if (frame::is_bci(bcx)) { | |
| 208 if (bcx < code_size()) { | |
| 209 bci = (int)bcx; | |
| 210 } | |
| 211 } else if (contains((address)bcx)) { | |
| 212 bci = (address)bcx - code_base(); | |
| 213 } | |
| 214 // Assert that if we have dodged any asserts, bci is negative. | |
| 215 assert(bci == -1 || bci == bci_from(bcp_from(bci)), "sane bci if >=0"); | |
| 216 return bci; | |
| 217 } | |
| 218 | |
| 219 address methodOopDesc::bcp_from(int bci) const { | |
| 220 assert((is_native() && bci == 0) || (!is_native() && 0 <= bci && bci < code_size()), "illegal bci"); | |
| 221 address bcp = code_base() + bci; | |
| 222 assert(is_native() && bcp == code_base() || contains(bcp), "bcp doesn't belong to this method"); | |
| 223 return bcp; | |
| 224 } | |
| 225 | |
| 226 | |
| 227 int methodOopDesc::object_size(bool is_native) { | |
| 228 // If native, then include pointers for native_function and signature_handler | |
| 229 int extra_bytes = (is_native) ? 2*sizeof(address*) : 0; | |
| 230 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; | |
| 231 return align_object_size(header_size() + extra_words); | |
| 232 } | |
| 233 | |
| 234 | |
| 235 symbolOop methodOopDesc::klass_name() const { | |
| 236 klassOop k = method_holder(); | |
| 237 assert(k->is_klass(), "must be klass"); | |
| 238 instanceKlass* ik = (instanceKlass*) k->klass_part(); | |
| 239 return ik->name(); | |
| 240 } | |
| 241 | |
| 242 | |
| 243 void methodOopDesc::set_interpreter_kind() { | |
| 244 int kind = Interpreter::method_kind(methodOop(this)); | |
| 245 assert(kind != Interpreter::invalid, | |
| 246 "interpreter entry must be valid"); | |
| 247 set_interpreter_kind(kind); | |
| 248 } | |
| 249 | |
| 250 | |
| 251 // Attempt to return method oop to original state. Clear any pointers | |
| 252 // (to objects outside the shared spaces). We won't be able to predict | |
| 253 // where they should point in a new JVM. Further initialize some | |
| 254 // entries now in order allow them to be write protected later. | |
| 255 | |
| 256 void methodOopDesc::remove_unshareable_info() { | |
| 257 unlink_method(); | |
| 258 set_interpreter_kind(); | |
| 259 } | |
| 260 | |
| 261 | |
| 1783 | 262 bool methodOopDesc::was_executed_more_than(int n) { |
| 0 | 263 // Invocation counter is reset when the methodOop is compiled. |
| 264 // If the method has compiled code we therefore assume it has | |
| 265 // be excuted more than n times. | |
| 266 if (is_accessor() || is_empty_method() || (code() != NULL)) { | |
| 267 // interpreter doesn't bump invocation counter of trivial methods | |
| 268 // compiler does not bump invocation counter of compiled methods | |
| 269 return true; | |
| 1783 | 270 } |
| 271 else if (_invocation_counter.carry() || (method_data() != NULL && method_data()->invocation_counter()->carry())) { | |
| 0 | 272 // The carry bit is set when the counter overflows and causes |
| 273 // a compilation to occur. We don't know how many times | |
| 274 // the counter has been reset, so we simply assume it has | |
| 275 // been executed more than n times. | |
| 276 return true; | |
| 277 } else { | |
| 278 return invocation_count() > n; | |
| 279 } | |
| 280 } | |
| 281 | |
| 282 #ifndef PRODUCT | |
| 1783 | 283 void methodOopDesc::print_invocation_count() { |
| 0 | 284 if (is_static()) tty->print("static "); |
| 285 if (is_final()) tty->print("final "); | |
| 286 if (is_synchronized()) tty->print("synchronized "); | |
| 287 if (is_native()) tty->print("native "); | |
| 288 method_holder()->klass_part()->name()->print_symbol_on(tty); | |
| 289 tty->print("."); | |
| 290 name()->print_symbol_on(tty); | |
| 291 signature()->print_symbol_on(tty); | |
| 292 | |
| 293 if (WizardMode) { | |
| 294 // dump the size of the byte codes | |
| 295 tty->print(" {%d}", code_size()); | |
| 296 } | |
| 297 tty->cr(); | |
| 298 | |
| 299 tty->print_cr (" interpreter_invocation_count: %8d ", interpreter_invocation_count()); | |
| 300 tty->print_cr (" invocation_counter: %8d ", invocation_count()); | |
| 301 tty->print_cr (" backedge_counter: %8d ", backedge_count()); | |
| 302 if (CountCompiledCalls) { | |
| 303 tty->print_cr (" compiled_invocation_count: %8d ", compiled_invocation_count()); | |
| 304 } | |
| 305 | |
| 306 } | |
| 307 #endif | |
| 308 | |
| 309 // Build a methodDataOop object to hold information about this method | |
| 310 // collected in the interpreter. | |
| 311 void methodOopDesc::build_interpreter_method_data(methodHandle method, TRAPS) { | |
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312 // Do not profile method if current thread holds the pending list lock, |
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313 // which avoids deadlock for acquiring the MethodData_lock. |
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314 if (instanceRefKlass::owns_pending_list_lock((JavaThread*)THREAD)) { |
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315 return; |
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316 } |
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317 |
| 0 | 318 // Grab a lock here to prevent multiple |
| 319 // methodDataOops from being created. | |
| 320 MutexLocker ml(MethodData_lock, THREAD); | |
| 321 if (method->method_data() == NULL) { | |
| 322 methodDataOop method_data = oopFactory::new_methodData(method, CHECK); | |
| 323 method->set_method_data(method_data); | |
| 324 if (PrintMethodData && (Verbose || WizardMode)) { | |
| 325 ResourceMark rm(THREAD); | |
| 326 tty->print("build_interpreter_method_data for "); | |
| 327 method->print_name(tty); | |
| 328 tty->cr(); | |
| 329 // At the end of the run, the MDO, full of data, will be dumped. | |
| 330 } | |
| 331 } | |
| 332 } | |
| 333 | |
| 334 void methodOopDesc::cleanup_inline_caches() { | |
| 335 // The current system doesn't use inline caches in the interpreter | |
| 336 // => nothing to do (keep this method around for future use) | |
| 337 } | |
| 338 | |
| 339 | |
| 710 | 340 int methodOopDesc::extra_stack_words() { |
| 341 // not an inline function, to avoid a header dependency on Interpreter | |
| 1506 | 342 return extra_stack_entries() * Interpreter::stackElementSize; |
| 710 | 343 } |
| 344 | |
| 345 | |
| 0 | 346 void methodOopDesc::compute_size_of_parameters(Thread *thread) { |
| 347 symbolHandle h_signature(thread, signature()); | |
| 348 ArgumentSizeComputer asc(h_signature); | |
| 349 set_size_of_parameters(asc.size() + (is_static() ? 0 : 1)); | |
| 350 } | |
| 351 | |
| 352 #ifdef CC_INTERP | |
| 353 void methodOopDesc::set_result_index(BasicType type) { | |
| 354 _result_index = Interpreter::BasicType_as_index(type); | |
| 355 } | |
| 356 #endif | |
| 357 | |
| 358 BasicType methodOopDesc::result_type() const { | |
| 359 ResultTypeFinder rtf(signature()); | |
| 360 return rtf.type(); | |
| 361 } | |
| 362 | |
| 363 | |
| 364 bool methodOopDesc::is_empty_method() const { | |
| 365 return code_size() == 1 | |
| 366 && *code_base() == Bytecodes::_return; | |
| 367 } | |
| 368 | |
| 369 | |
| 370 bool methodOopDesc::is_vanilla_constructor() const { | |
| 371 // Returns true if this method is a vanilla constructor, i.e. an "<init>" "()V" method | |
| 372 // which only calls the superclass vanilla constructor and possibly does stores of | |
| 373 // zero constants to local fields: | |
| 374 // | |
| 375 // aload_0 | |
| 376 // invokespecial | |
| 377 // indexbyte1 | |
| 378 // indexbyte2 | |
| 379 // | |
| 380 // followed by an (optional) sequence of: | |
| 381 // | |
| 382 // aload_0 | |
| 383 // aconst_null / iconst_0 / fconst_0 / dconst_0 | |
| 384 // putfield | |
| 385 // indexbyte1 | |
| 386 // indexbyte2 | |
| 387 // | |
| 388 // followed by: | |
| 389 // | |
| 390 // return | |
| 391 | |
| 392 assert(name() == vmSymbols::object_initializer_name(), "Should only be called for default constructors"); | |
| 393 assert(signature() == vmSymbols::void_method_signature(), "Should only be called for default constructors"); | |
| 394 int size = code_size(); | |
| 395 // Check if size match | |
| 396 if (size == 0 || size % 5 != 0) return false; | |
| 397 address cb = code_base(); | |
| 398 int last = size - 1; | |
| 399 if (cb[0] != Bytecodes::_aload_0 || cb[1] != Bytecodes::_invokespecial || cb[last] != Bytecodes::_return) { | |
| 400 // Does not call superclass default constructor | |
| 401 return false; | |
| 402 } | |
| 403 // Check optional sequence | |
| 404 for (int i = 4; i < last; i += 5) { | |
| 405 if (cb[i] != Bytecodes::_aload_0) return false; | |
| 406 if (!Bytecodes::is_zero_const(Bytecodes::cast(cb[i+1]))) return false; | |
| 407 if (cb[i+2] != Bytecodes::_putfield) return false; | |
| 408 } | |
| 409 return true; | |
| 410 } | |
| 411 | |
| 412 | |
| 413 bool methodOopDesc::compute_has_loops_flag() { | |
| 414 BytecodeStream bcs(methodOop(this)); | |
| 415 Bytecodes::Code bc; | |
| 416 | |
| 417 while ((bc = bcs.next()) >= 0) { | |
| 418 switch( bc ) { | |
| 419 case Bytecodes::_ifeq: | |
| 420 case Bytecodes::_ifnull: | |
| 421 case Bytecodes::_iflt: | |
| 422 case Bytecodes::_ifle: | |
| 423 case Bytecodes::_ifne: | |
| 424 case Bytecodes::_ifnonnull: | |
| 425 case Bytecodes::_ifgt: | |
| 426 case Bytecodes::_ifge: | |
| 427 case Bytecodes::_if_icmpeq: | |
| 428 case Bytecodes::_if_icmpne: | |
| 429 case Bytecodes::_if_icmplt: | |
| 430 case Bytecodes::_if_icmpgt: | |
| 431 case Bytecodes::_if_icmple: | |
| 432 case Bytecodes::_if_icmpge: | |
| 433 case Bytecodes::_if_acmpeq: | |
| 434 case Bytecodes::_if_acmpne: | |
| 435 case Bytecodes::_goto: | |
| 436 case Bytecodes::_jsr: | |
| 437 if( bcs.dest() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
| 438 break; | |
| 439 | |
| 440 case Bytecodes::_goto_w: | |
| 441 case Bytecodes::_jsr_w: | |
| 442 if( bcs.dest_w() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
| 443 break; | |
| 444 } | |
| 445 } | |
| 446 _access_flags.set_loops_flag_init(); | |
| 447 return _access_flags.has_loops(); | |
| 448 } | |
| 449 | |
| 450 | |
| 451 bool methodOopDesc::is_final_method() const { | |
| 452 // %%% Should return true for private methods also, | |
| 453 // since there is no way to override them. | |
| 454 return is_final() || Klass::cast(method_holder())->is_final(); | |
| 455 } | |
| 456 | |
| 457 | |
| 458 bool methodOopDesc::is_strict_method() const { | |
| 459 return is_strict(); | |
| 460 } | |
| 461 | |
| 462 | |
| 463 bool methodOopDesc::can_be_statically_bound() const { | |
| 464 if (is_final_method()) return true; | |
| 465 return vtable_index() == nonvirtual_vtable_index; | |
| 466 } | |
| 467 | |
| 468 | |
| 469 bool methodOopDesc::is_accessor() const { | |
| 470 if (code_size() != 5) return false; | |
| 471 if (size_of_parameters() != 1) return false; | |
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472 methodOop m = (methodOop)this; // pass to code_at() to avoid method_from_bcp |
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473 if (Bytecodes::java_code_at(code_base()+0, m) != Bytecodes::_aload_0 ) return false; |
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474 if (Bytecodes::java_code_at(code_base()+1, m) != Bytecodes::_getfield) return false; |
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475 if (Bytecodes::java_code_at(code_base()+4, m) != Bytecodes::_areturn && |
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476 Bytecodes::java_code_at(code_base()+4, m) != Bytecodes::_ireturn ) return false; |
| 0 | 477 return true; |
| 478 } | |
| 479 | |
| 480 | |
| 481 bool methodOopDesc::is_initializer() const { | |
| 482 return name() == vmSymbols::object_initializer_name() || name() == vmSymbols::class_initializer_name(); | |
| 483 } | |
| 484 | |
| 485 | |
| 486 objArrayHandle methodOopDesc::resolved_checked_exceptions_impl(methodOop this_oop, TRAPS) { | |
| 487 int length = this_oop->checked_exceptions_length(); | |
| 488 if (length == 0) { // common case | |
| 489 return objArrayHandle(THREAD, Universe::the_empty_class_klass_array()); | |
| 490 } else { | |
| 491 methodHandle h_this(THREAD, this_oop); | |
| 1142 | 492 objArrayOop m_oop = oopFactory::new_objArray(SystemDictionary::Class_klass(), length, CHECK_(objArrayHandle())); |
| 0 | 493 objArrayHandle mirrors (THREAD, m_oop); |
| 494 for (int i = 0; i < length; i++) { | |
| 495 CheckedExceptionElement* table = h_this->checked_exceptions_start(); // recompute on each iteration, not gc safe | |
| 496 klassOop k = h_this->constants()->klass_at(table[i].class_cp_index, CHECK_(objArrayHandle())); | |
| 1142 | 497 assert(Klass::cast(k)->is_subclass_of(SystemDictionary::Throwable_klass()), "invalid exception class"); |
| 0 | 498 mirrors->obj_at_put(i, Klass::cast(k)->java_mirror()); |
| 499 } | |
| 500 return mirrors; | |
| 501 } | |
| 502 }; | |
| 503 | |
| 504 | |
| 505 int methodOopDesc::line_number_from_bci(int bci) const { | |
| 506 if (bci == SynchronizationEntryBCI) bci = 0; | |
| 507 assert(bci == 0 || 0 <= bci && bci < code_size(), "illegal bci"); | |
| 508 int best_bci = 0; | |
| 509 int best_line = -1; | |
| 510 | |
| 511 if (has_linenumber_table()) { | |
| 512 // The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
| 513 // Not necessarily sorted and not necessarily one-to-one. | |
| 514 CompressedLineNumberReadStream stream(compressed_linenumber_table()); | |
| 515 while (stream.read_pair()) { | |
| 516 if (stream.bci() == bci) { | |
| 517 // perfect match | |
| 518 return stream.line(); | |
| 519 } else { | |
| 520 // update best_bci/line | |
| 521 if (stream.bci() < bci && stream.bci() >= best_bci) { | |
| 522 best_bci = stream.bci(); | |
| 523 best_line = stream.line(); | |
| 524 } | |
| 525 } | |
| 526 } | |
| 527 } | |
| 528 return best_line; | |
| 529 } | |
| 530 | |
| 531 | |
| 532 bool methodOopDesc::is_klass_loaded_by_klass_index(int klass_index) const { | |
| 533 if( _constants->tag_at(klass_index).is_unresolved_klass() ) { | |
| 534 Thread *thread = Thread::current(); | |
| 535 symbolHandle klass_name(thread, _constants->klass_name_at(klass_index)); | |
| 536 Handle loader(thread, instanceKlass::cast(method_holder())->class_loader()); | |
| 537 Handle prot (thread, Klass::cast(method_holder())->protection_domain()); | |
| 538 return SystemDictionary::find(klass_name, loader, prot, thread) != NULL; | |
| 539 } else { | |
| 540 return true; | |
| 541 } | |
| 542 } | |
| 543 | |
| 544 | |
| 545 bool methodOopDesc::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { | |
| 546 int klass_index = _constants->klass_ref_index_at(refinfo_index); | |
| 547 if (must_be_resolved) { | |
| 548 // Make sure klass is resolved in constantpool. | |
| 549 if (constants()->tag_at(klass_index).is_unresolved_klass()) return false; | |
| 550 } | |
| 551 return is_klass_loaded_by_klass_index(klass_index); | |
| 552 } | |
| 553 | |
| 554 | |
| 555 void methodOopDesc::set_native_function(address function, bool post_event_flag) { | |
| 556 assert(function != NULL, "use clear_native_function to unregister natives"); | |
| 557 address* native_function = native_function_addr(); | |
| 558 | |
| 559 // We can see racers trying to place the same native function into place. Once | |
| 560 // is plenty. | |
| 561 address current = *native_function; | |
| 562 if (current == function) return; | |
| 563 if (post_event_flag && JvmtiExport::should_post_native_method_bind() && | |
| 564 function != NULL) { | |
| 565 // native_method_throw_unsatisfied_link_error_entry() should only | |
| 566 // be passed when post_event_flag is false. | |
| 567 assert(function != | |
| 568 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 569 "post_event_flag mis-match"); | |
| 570 | |
| 571 // post the bind event, and possible change the bind function | |
| 572 JvmtiExport::post_native_method_bind(this, &function); | |
| 573 } | |
| 574 *native_function = function; | |
| 575 // This function can be called more than once. We must make sure that we always | |
| 576 // use the latest registered method -> check if a stub already has been generated. | |
| 577 // If so, we have to make it not_entrant. | |
| 578 nmethod* nm = code(); // Put it into local variable to guard against concurrent updates | |
| 579 if (nm != NULL) { | |
| 580 nm->make_not_entrant(); | |
| 581 } | |
| 582 } | |
| 583 | |
| 584 | |
| 585 bool methodOopDesc::has_native_function() const { | |
| 586 address func = native_function(); | |
| 587 return (func != NULL && func != SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); | |
| 588 } | |
| 589 | |
| 590 | |
| 591 void methodOopDesc::clear_native_function() { | |
| 592 set_native_function( | |
| 593 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 594 !native_bind_event_is_interesting); | |
| 595 clear_code(); | |
| 596 } | |
| 597 | |
| 598 | |
| 599 void methodOopDesc::set_signature_handler(address handler) { | |
| 600 address* signature_handler = signature_handler_addr(); | |
| 601 *signature_handler = handler; | |
| 602 } | |
| 603 | |
| 604 | |
| 605 bool methodOopDesc::is_not_compilable(int comp_level) const { | |
| 710 | 606 if (is_method_handle_invoke()) { |
| 607 // compilers must recognize this method specially, or not at all | |
| 608 return true; | |
| 609 } | |
| 1783 | 610 if (number_of_breakpoints() > 0) { |
| 611 return true; | |
| 612 } | |
| 613 if (comp_level == CompLevel_any) { | |
| 614 return is_not_c1_compilable() || is_not_c2_compilable(); | |
| 0 | 615 } |
| 1783 | 616 if (is_c1_compile(comp_level)) { |
| 617 return is_not_c1_compilable(); | |
| 618 } | |
| 619 if (is_c2_compile(comp_level)) { | |
| 620 return is_not_c2_compilable(); | |
| 621 } | |
| 622 return false; | |
| 0 | 623 } |
| 624 | |
| 625 // call this when compiler finds that this method is not compilable | |
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626 void methodOopDesc::set_not_compilable(int comp_level, bool report) { |
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627 if (PrintCompilation && report) { |
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628 ttyLocker ttyl; |
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629 tty->print("made not compilable "); |
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630 this->print_short_name(tty); |
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631 int size = this->code_size(); |
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632 if (size > 0) |
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633 tty->print(" (%d bytes)", size); |
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634 tty->cr(); |
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635 } |
| 0 | 636 if ((TraceDeoptimization || LogCompilation) && (xtty != NULL)) { |
| 637 ttyLocker ttyl; | |
| 638 xtty->begin_elem("make_not_compilable thread='%d'", (int) os::current_thread_id()); | |
| 639 xtty->method(methodOop(this)); | |
| 640 xtty->stamp(); | |
| 641 xtty->end_elem(); | |
| 642 } | |
| 1783 | 643 if (comp_level == CompLevel_all) { |
| 644 set_not_c1_compilable(); | |
| 645 set_not_c2_compilable(); | |
| 646 } else { | |
| 647 if (is_c1_compile(comp_level)) { | |
| 648 set_not_c1_compilable(); | |
| 649 } else | |
| 650 if (is_c2_compile(comp_level)) { | |
| 651 set_not_c2_compilable(); | |
| 652 } | |
| 0 | 653 } |
| 1783 | 654 CompilationPolicy::policy()->disable_compilation(this); |
| 0 | 655 } |
| 656 | |
| 657 // Revert to using the interpreter and clear out the nmethod | |
| 658 void methodOopDesc::clear_code() { | |
| 659 | |
| 660 // this may be NULL if c2i adapters have not been made yet | |
| 661 // Only should happen at allocate time. | |
| 662 if (_adapter == NULL) { | |
| 663 _from_compiled_entry = NULL; | |
| 664 } else { | |
| 665 _from_compiled_entry = _adapter->get_c2i_entry(); | |
| 666 } | |
| 667 OrderAccess::storestore(); | |
| 668 _from_interpreted_entry = _i2i_entry; | |
| 669 OrderAccess::storestore(); | |
| 670 _code = NULL; | |
| 671 } | |
| 672 | |
| 673 // Called by class data sharing to remove any entry points (which are not shared) | |
| 674 void methodOopDesc::unlink_method() { | |
| 675 _code = NULL; | |
| 676 _i2i_entry = NULL; | |
| 677 _from_interpreted_entry = NULL; | |
| 678 if (is_native()) { | |
| 679 *native_function_addr() = NULL; | |
| 680 set_signature_handler(NULL); | |
| 681 } | |
| 682 NOT_PRODUCT(set_compiled_invocation_count(0);) | |
| 683 invocation_counter()->reset(); | |
| 684 backedge_counter()->reset(); | |
| 685 _adapter = NULL; | |
| 686 _from_compiled_entry = NULL; | |
| 687 assert(_method_data == NULL, "unexpected method data?"); | |
| 688 set_method_data(NULL); | |
| 689 set_interpreter_throwout_count(0); | |
| 690 set_interpreter_invocation_count(0); | |
| 691 } | |
| 692 | |
| 693 // Called when the method_holder is getting linked. Setup entrypoints so the method | |
| 694 // is ready to be called from interpreter, compiler, and vtables. | |
| 695 void methodOopDesc::link_method(methodHandle h_method, TRAPS) { | |
| 696 assert(_i2i_entry == NULL, "should only be called once"); | |
| 697 assert(_adapter == NULL, "init'd to NULL" ); | |
| 698 assert( _code == NULL, "nothing compiled yet" ); | |
| 699 | |
| 700 // Setup interpreter entrypoint | |
| 701 assert(this == h_method(), "wrong h_method()" ); | |
| 702 address entry = Interpreter::entry_for_method(h_method); | |
| 703 assert(entry != NULL, "interpreter entry must be non-null"); | |
| 704 // Sets both _i2i_entry and _from_interpreted_entry | |
| 705 set_interpreter_entry(entry); | |
| 710 | 706 if (is_native() && !is_method_handle_invoke()) { |
| 0 | 707 set_native_function( |
| 708 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 709 !native_bind_event_is_interesting); | |
| 710 } | |
| 711 | |
| 712 // Setup compiler entrypoint. This is made eagerly, so we do not need | |
| 713 // special handling of vtables. An alternative is to make adapters more | |
| 714 // lazily by calling make_adapter() from from_compiled_entry() for the | |
| 715 // normal calls. For vtable calls life gets more complicated. When a | |
| 716 // call-site goes mega-morphic we need adapters in all methods which can be | |
| 717 // called from the vtable. We need adapters on such methods that get loaded | |
| 718 // later. Ditto for mega-morphic itable calls. If this proves to be a | |
| 719 // problem we'll make these lazily later. | |
| 720 (void) make_adapters(h_method, CHECK); | |
| 721 | |
| 722 // ONLY USE the h_method now as make_adapter may have blocked | |
| 723 | |
| 724 } | |
| 725 | |
| 726 address methodOopDesc::make_adapters(methodHandle mh, TRAPS) { | |
| 727 // Adapters for compiled code are made eagerly here. They are fairly | |
| 728 // small (generally < 100 bytes) and quick to make (and cached and shared) | |
| 729 // so making them eagerly shouldn't be too expensive. | |
| 730 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh); | |
| 731 if (adapter == NULL ) { | |
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732 THROW_MSG_NULL(vmSymbols::java_lang_VirtualMachineError(), "out of space in CodeCache for adapters"); |
| 0 | 733 } |
| 734 | |
| 735 mh->set_adapter_entry(adapter); | |
| 736 mh->_from_compiled_entry = adapter->get_c2i_entry(); | |
| 737 return adapter->get_c2i_entry(); | |
| 738 } | |
| 739 | |
| 740 // The verified_code_entry() must be called when a invoke is resolved | |
| 741 // on this method. | |
| 742 | |
| 743 // It returns the compiled code entry point, after asserting not null. | |
| 744 // This function is called after potential safepoints so that nmethod | |
| 745 // or adapter that it points to is still live and valid. | |
| 746 // This function must not hit a safepoint! | |
| 747 address methodOopDesc::verified_code_entry() { | |
| 748 debug_only(No_Safepoint_Verifier nsv;) | |
| 1202 | 749 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); |
| 750 if (code == NULL && UseCodeCacheFlushing) { | |
| 751 nmethod *saved_code = CodeCache::find_and_remove_saved_code(this); | |
| 752 if (saved_code != NULL) { | |
| 753 methodHandle method(this); | |
| 754 assert( ! saved_code->is_osr_method(), "should not get here for osr" ); | |
| 755 set_code( method, saved_code ); | |
| 756 } | |
| 757 } | |
| 758 | |
| 0 | 759 assert(_from_compiled_entry != NULL, "must be set"); |
| 760 return _from_compiled_entry; | |
| 761 } | |
| 762 | |
| 763 // Check that if an nmethod ref exists, it has a backlink to this or no backlink at all | |
| 764 // (could be racing a deopt). | |
| 765 // Not inline to avoid circular ref. | |
| 766 bool methodOopDesc::check_code() const { | |
| 767 // cached in a register or local. There's a race on the value of the field. | |
| 768 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); | |
| 769 return code == NULL || (code->method() == NULL) || (code->method() == (methodOop)this && !code->is_osr_method()); | |
| 770 } | |
| 771 | |
| 772 // Install compiled code. Instantly it can execute. | |
| 773 void methodOopDesc::set_code(methodHandle mh, nmethod *code) { | |
| 774 assert( code, "use clear_code to remove code" ); | |
| 775 assert( mh->check_code(), "" ); | |
| 776 | |
| 777 guarantee(mh->adapter() != NULL, "Adapter blob must already exist!"); | |
| 778 | |
| 779 // These writes must happen in this order, because the interpreter will | |
| 780 // directly jump to from_interpreted_entry which jumps to an i2c adapter | |
| 781 // which jumps to _from_compiled_entry. | |
| 782 mh->_code = code; // Assign before allowing compiled code to exec | |
| 783 | |
| 784 int comp_level = code->comp_level(); | |
| 785 // In theory there could be a race here. In practice it is unlikely | |
| 786 // and not worth worrying about. | |
| 1783 | 787 if (comp_level > mh->highest_comp_level()) { |
| 788 mh->set_highest_comp_level(comp_level); | |
| 0 | 789 } |
| 790 | |
| 791 OrderAccess::storestore(); | |
| 1692 | 792 #ifdef SHARK |
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793 mh->_from_interpreted_entry = code->insts_begin(); |
| 1692 | 794 #else |
| 0 | 795 mh->_from_compiled_entry = code->verified_entry_point(); |
| 796 OrderAccess::storestore(); | |
| 797 // Instantly compiled code can execute. | |
| 798 mh->_from_interpreted_entry = mh->get_i2c_entry(); | |
| 1692 | 799 #endif // SHARK |
| 0 | 800 |
| 801 } | |
| 802 | |
| 803 | |
| 804 bool methodOopDesc::is_overridden_in(klassOop k) const { | |
| 805 instanceKlass* ik = instanceKlass::cast(k); | |
| 806 | |
| 807 if (ik->is_interface()) return false; | |
| 808 | |
| 809 // If method is an interface, we skip it - except if it | |
| 810 // is a miranda method | |
| 811 if (instanceKlass::cast(method_holder())->is_interface()) { | |
| 812 // Check that method is not a miranda method | |
| 813 if (ik->lookup_method(name(), signature()) == NULL) { | |
| 814 // No implementation exist - so miranda method | |
| 815 return false; | |
| 816 } | |
| 817 return true; | |
| 818 } | |
| 819 | |
| 820 assert(ik->is_subclass_of(method_holder()), "should be subklass"); | |
| 821 assert(ik->vtable() != NULL, "vtable should exist"); | |
| 822 if (vtable_index() == nonvirtual_vtable_index) { | |
| 823 return false; | |
| 824 } else { | |
| 825 methodOop vt_m = ik->method_at_vtable(vtable_index()); | |
| 826 return vt_m != methodOop(this); | |
| 827 } | |
| 828 } | |
| 829 | |
| 830 | |
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831 // give advice about whether this methodOop should be cached or not |
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832 bool methodOopDesc::should_not_be_cached() const { |
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833 if (is_old()) { |
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834 // This method has been redefined. It is either EMCP or obsolete |
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835 // and we don't want to cache it because that would pin the method |
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836 // down and prevent it from being collectible if and when it |
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837 // finishes executing. |
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838 return true; |
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839 } |
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840 |
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841 if (mark()->should_not_be_cached()) { |
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842 // It is either not safe or not a good idea to cache this |
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843 // method at this time because of the state of the embedded |
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844 // markOop. See markOop.cpp for the gory details. |
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845 return true; |
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846 } |
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847 |
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848 // caching this method should be just fine |
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849 return false; |
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850 } |
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851 |
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852 bool methodOopDesc::is_method_handle_invoke_name(vmSymbols::SID name_sid) { |
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853 switch (name_sid) { |
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854 case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeExact_name): |
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855 case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeGeneric_name): |
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856 return true; |
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857 } |
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858 if (AllowTransitionalJSR292 |
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859 && name_sid == vmSymbols::VM_SYMBOL_ENUM_NAME(invoke_name)) |
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860 return true; |
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861 return false; |
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862 } |
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863 |
| 710 | 864 // Constant pool structure for invoke methods: |
| 865 enum { | |
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866 _imcp_invoke_name = 1, // utf8: 'invokeExact' or 'invokeGeneric' |
| 710 | 867 _imcp_invoke_signature, // utf8: (variable symbolOop) |
| 868 _imcp_method_type_value, // string: (variable java/dyn/MethodType, sic) | |
| 869 _imcp_limit | |
| 870 }; | |
| 871 | |
| 872 oop methodOopDesc::method_handle_type() const { | |
| 873 if (!is_method_handle_invoke()) { assert(false, "caller resp."); return NULL; } | |
| 874 oop mt = constants()->resolved_string_at(_imcp_method_type_value); | |
| 875 assert(mt->klass() == SystemDictionary::MethodType_klass(), ""); | |
| 876 return mt; | |
| 877 } | |
| 878 | |
| 879 jint* methodOopDesc::method_type_offsets_chain() { | |
| 880 static jint pchase[] = { -1, -1, -1 }; | |
| 881 if (pchase[0] == -1) { | |
| 882 jint step0 = in_bytes(constants_offset()); | |
| 883 jint step1 = (constantPoolOopDesc::header_size() + _imcp_method_type_value) * HeapWordSize; | |
| 884 // do this in reverse to avoid races: | |
| 885 OrderAccess::release_store(&pchase[1], step1); | |
| 886 OrderAccess::release_store(&pchase[0], step0); | |
| 887 } | |
| 888 return pchase; | |
| 889 } | |
| 890 | |
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891 //------------------------------------------------------------------------------ |
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892 // methodOopDesc::is_method_handle_adapter |
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893 // |
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894 // Tests if this method is an internal adapter frame from the |
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895 // MethodHandleCompiler. |
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896 // Must be consistent with MethodHandleCompiler::get_method_oop(). |
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897 bool methodOopDesc::is_method_handle_adapter() const { |
|
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898 if (is_synthetic() && |
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899 !is_native() && // has code from MethodHandleCompiler |
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900 is_method_handle_invoke_name(name()) && |
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901 MethodHandleCompiler::klass_is_method_handle_adapter_holder(method_holder())) { |
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902 assert(!is_method_handle_invoke(), "disjoint"); |
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903 return true; |
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904 } else { |
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905 return false; |
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906 } |
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907 } |
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908 |
| 710 | 909 methodHandle methodOopDesc::make_invoke_method(KlassHandle holder, |
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910 symbolHandle name, |
| 710 | 911 symbolHandle signature, |
| 912 Handle method_type, TRAPS) { | |
| 913 methodHandle empty; | |
| 914 | |
| 915 assert(holder() == SystemDictionary::MethodHandle_klass(), | |
| 916 "must be a JSR 292 magic type"); | |
| 917 | |
| 918 if (TraceMethodHandles) { | |
| 919 tty->print("Creating invoke method for "); | |
| 920 signature->print_value(); | |
| 921 tty->cr(); | |
| 922 } | |
| 923 | |
| 924 constantPoolHandle cp; | |
| 925 { | |
| 926 constantPoolOop cp_oop = oopFactory::new_constantPool(_imcp_limit, IsSafeConc, CHECK_(empty)); | |
| 927 cp = constantPoolHandle(THREAD, cp_oop); | |
| 928 } | |
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929 cp->symbol_at_put(_imcp_invoke_name, name()); |
| 710 | 930 cp->symbol_at_put(_imcp_invoke_signature, signature()); |
| 931 cp->string_at_put(_imcp_method_type_value, vmSymbols::void_signature()); | |
| 932 cp->set_pool_holder(holder()); | |
| 933 | |
| 934 // set up the fancy stuff: | |
| 935 cp->pseudo_string_at_put(_imcp_method_type_value, method_type()); | |
| 936 methodHandle m; | |
| 937 { | |
| 938 int flags_bits = (JVM_MH_INVOKE_BITS | JVM_ACC_PUBLIC | JVM_ACC_FINAL); | |
| 939 methodOop m_oop = oopFactory::new_method(0, accessFlags_from(flags_bits), | |
| 940 0, 0, 0, IsSafeConc, CHECK_(empty)); | |
| 941 m = methodHandle(THREAD, m_oop); | |
| 942 } | |
| 943 m->set_constants(cp()); | |
| 944 m->set_name_index(_imcp_invoke_name); | |
| 945 m->set_signature_index(_imcp_invoke_signature); | |
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946 assert(is_method_handle_invoke_name(m->name()), ""); |
| 710 | 947 assert(m->signature() == signature(), ""); |
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948 assert(m->is_method_handle_invoke(), ""); |
| 710 | 949 #ifdef CC_INTERP |
| 950 ResultTypeFinder rtf(signature()); | |
| 951 m->set_result_index(rtf.type()); | |
| 952 #endif | |
| 953 m->compute_size_of_parameters(THREAD); | |
| 954 m->set_exception_table(Universe::the_empty_int_array()); | |
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955 m->init_intrinsic_id(); |
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956 assert(m->intrinsic_id() == vmIntrinsics::_invokeExact || |
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957 m->intrinsic_id() == vmIntrinsics::_invokeGeneric, "must be an invoker"); |
| 710 | 958 |
| 959 // Finally, set up its entry points. | |
| 960 assert(m->method_handle_type() == method_type(), ""); | |
| 961 assert(m->can_be_statically_bound(), ""); | |
| 962 m->set_vtable_index(methodOopDesc::nonvirtual_vtable_index); | |
| 963 m->link_method(m, CHECK_(empty)); | |
| 964 | |
| 965 #ifdef ASSERT | |
| 966 // Make sure the pointer chase works. | |
| 967 address p = (address) m(); | |
| 968 for (jint* pchase = method_type_offsets_chain(); (*pchase) != -1; pchase++) { | |
| 969 p = *(address*)(p + (*pchase)); | |
| 970 } | |
| 971 assert((oop)p == method_type(), "pointer chase is correct"); | |
| 972 #endif | |
| 973 | |
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974 if (TraceMethodHandles && (Verbose || WizardMode)) |
| 710 | 975 m->print_on(tty); |
| 976 | |
| 977 return m; | |
| 978 } | |
| 979 | |
| 980 | |
|
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981 |
| 0 | 982 methodHandle methodOopDesc:: clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, |
| 983 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS) { | |
| 984 // Code below does not work for native methods - they should never get rewritten anyway | |
| 985 assert(!m->is_native(), "cannot rewrite native methods"); | |
| 986 // Allocate new methodOop | |
| 987 AccessFlags flags = m->access_flags(); | |
| 988 int checked_exceptions_len = m->checked_exceptions_length(); | |
| 989 int localvariable_len = m->localvariable_table_length(); | |
|
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990 // Allocate newm_oop with the is_conc_safe parameter set |
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991 // to IsUnsafeConc to indicate that newm_oop is not yet |
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992 // safe for concurrent processing by a GC. |
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993 methodOop newm_oop = oopFactory::new_method(new_code_length, |
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994 flags, |
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995 new_compressed_linenumber_size, |
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996 localvariable_len, |
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997 checked_exceptions_len, |
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998 IsUnsafeConc, |
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999 CHECK_(methodHandle())); |
| 0 | 1000 methodHandle newm (THREAD, newm_oop); |
| 1001 int new_method_size = newm->method_size(); | |
| 1002 // Create a shallow copy of methodOopDesc part, but be careful to preserve the new constMethodOop | |
| 1003 constMethodOop newcm = newm->constMethod(); | |
| 1004 int new_const_method_size = newm->constMethod()->object_size(); | |
|
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1005 |
| 0 | 1006 memcpy(newm(), m(), sizeof(methodOopDesc)); |
| 1007 // Create shallow copy of constMethodOopDesc, but be careful to preserve the methodOop | |
|
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1008 // is_conc_safe is set to false because that is the value of |
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1009 // is_conc_safe initialzied into newcm and the copy should |
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1010 // not overwrite that value. During the window during which it is |
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1011 // tagged as unsafe, some extra work could be needed during precleaning |
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1012 // or concurrent marking but those phases will be correct. Setting and |
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1013 // resetting is done in preference to a careful copying into newcm to |
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1014 // avoid having to know the precise layout of a constMethodOop. |
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1015 m->constMethod()->set_is_conc_safe(false); |
| 0 | 1016 memcpy(newcm, m->constMethod(), sizeof(constMethodOopDesc)); |
|
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1017 m->constMethod()->set_is_conc_safe(true); |
| 0 | 1018 // Reset correct method/const method, method size, and parameter info |
| 1019 newcm->set_method(newm()); | |
| 1020 newm->set_constMethod(newcm); | |
| 1021 assert(newcm->method() == newm(), "check"); | |
| 1022 newm->constMethod()->set_code_size(new_code_length); | |
| 1023 newm->constMethod()->set_constMethod_size(new_const_method_size); | |
| 1024 newm->set_method_size(new_method_size); | |
| 1025 assert(newm->code_size() == new_code_length, "check"); | |
| 1026 assert(newm->checked_exceptions_length() == checked_exceptions_len, "check"); | |
| 1027 assert(newm->localvariable_table_length() == localvariable_len, "check"); | |
| 1028 // Copy new byte codes | |
| 1029 memcpy(newm->code_base(), new_code, new_code_length); | |
| 1030 // Copy line number table | |
| 1031 if (new_compressed_linenumber_size > 0) { | |
| 1032 memcpy(newm->compressed_linenumber_table(), | |
| 1033 new_compressed_linenumber_table, | |
| 1034 new_compressed_linenumber_size); | |
| 1035 } | |
| 1036 // Copy checked_exceptions | |
| 1037 if (checked_exceptions_len > 0) { | |
| 1038 memcpy(newm->checked_exceptions_start(), | |
| 1039 m->checked_exceptions_start(), | |
| 1040 checked_exceptions_len * sizeof(CheckedExceptionElement)); | |
| 1041 } | |
| 1042 // Copy local variable number table | |
| 1043 if (localvariable_len > 0) { | |
| 1044 memcpy(newm->localvariable_table_start(), | |
| 1045 m->localvariable_table_start(), | |
| 1046 localvariable_len * sizeof(LocalVariableTableElement)); | |
| 1047 } | |
|
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1048 |
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1049 // Only set is_conc_safe to true when changes to newcm are |
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1050 // complete. |
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1051 newcm->set_is_conc_safe(true); |
| 0 | 1052 return newm; |
| 1053 } | |
| 1054 | |
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1055 vmSymbols::SID methodOopDesc::klass_id_for_intrinsics(klassOop holder) { |
| 0 | 1056 // if loader is not the default loader (i.e., != NULL), we can't know the intrinsics |
| 1057 // because we are not loading from core libraries | |
|
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1058 if (instanceKlass::cast(holder)->class_loader() != NULL) |
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1059 return vmSymbols::NO_SID; // regardless of name, no intrinsics here |
| 0 | 1060 |
| 1061 // see if the klass name is well-known: | |
|
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1062 symbolOop klass_name = instanceKlass::cast(holder)->name(); |
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1063 return vmSymbols::find_sid(klass_name); |
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1064 } |
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1065 |
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1066 void methodOopDesc::init_intrinsic_id() { |
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1067 assert(_intrinsic_id == vmIntrinsics::_none, "do this just once"); |
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1068 const uintptr_t max_id_uint = right_n_bits((int)(sizeof(_intrinsic_id) * BitsPerByte)); |
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1069 assert((uintptr_t)vmIntrinsics::ID_LIMIT <= max_id_uint, "else fix size"); |
|
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1070 assert(intrinsic_id_size_in_bytes() == sizeof(_intrinsic_id), ""); |
|
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1071 |
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1072 // the klass name is well-known: |
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1073 vmSymbols::SID klass_id = klass_id_for_intrinsics(method_holder()); |
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1074 assert(klass_id != vmSymbols::NO_SID, "caller responsibility"); |
| 0 | 1075 |
| 1076 // ditto for method and signature: | |
| 1077 vmSymbols::SID name_id = vmSymbols::find_sid(name()); | |
|
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1078 if (name_id == vmSymbols::NO_SID) return; |
| 0 | 1079 vmSymbols::SID sig_id = vmSymbols::find_sid(signature()); |
|
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1080 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_dyn_MethodHandle) |
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1081 && sig_id == vmSymbols::NO_SID) return; |
| 0 | 1082 jshort flags = access_flags().as_short(); |
| 1083 | |
|
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1084 vmIntrinsics::ID id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
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1085 if (id != vmIntrinsics::_none) { |
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1086 set_intrinsic_id(id); |
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1087 return; |
|
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|
1088 } |
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1089 |
| 0 | 1090 // A few slightly irregular cases: |
| 1091 switch (klass_id) { | |
| 1092 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_StrictMath): | |
| 1093 // Second chance: check in regular Math. | |
| 1094 switch (name_id) { | |
| 1095 case vmSymbols::VM_SYMBOL_ENUM_NAME(min_name): | |
| 1096 case vmSymbols::VM_SYMBOL_ENUM_NAME(max_name): | |
| 1097 case vmSymbols::VM_SYMBOL_ENUM_NAME(sqrt_name): | |
| 1098 // pretend it is the corresponding method in the non-strict class: | |
| 1099 klass_id = vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_Math); | |
|
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1100 id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
| 0 | 1101 break; |
| 1102 } | |
|
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|
1103 break; |
|
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|
1104 |
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1105 // Signature-polymorphic methods: MethodHandle.invoke*, InvokeDynamic.*. |
|
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1106 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_dyn_MethodHandle): |
|
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1107 if (is_static() || !is_native()) break; |
|
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1108 switch (name_id) { |
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1109 case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeGeneric_name): |
|
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1110 id = vmIntrinsics::_invokeGeneric; |
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1111 break; |
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1112 case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeExact_name): |
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1113 id = vmIntrinsics::_invokeExact; |
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1114 break; |
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1115 case vmSymbols::VM_SYMBOL_ENUM_NAME(invoke_name): |
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1116 if (AllowTransitionalJSR292) id = vmIntrinsics::_invokeExact; |
|
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1117 break; |
|
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|
1118 } |
|
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|
1119 break; |
|
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|
1120 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_dyn_InvokeDynamic): |
|
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1121 if (!is_static() || !is_native()) break; |
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|
1122 id = vmIntrinsics::_invokeDynamic; |
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|
1123 break; |
| 0 | 1124 } |
| 1125 | |
|
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1126 if (id != vmIntrinsics::_none) { |
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1127 // Set up its iid. It is an alias method. |
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1128 set_intrinsic_id(id); |
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1129 return; |
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|
1130 } |
| 0 | 1131 } |
| 1132 | |
| 1133 // These two methods are static since a GC may move the methodOopDesc | |
| 1134 bool methodOopDesc::load_signature_classes(methodHandle m, TRAPS) { | |
| 1135 bool sig_is_loaded = true; | |
| 1136 Handle class_loader(THREAD, instanceKlass::cast(m->method_holder())->class_loader()); | |
| 1137 Handle protection_domain(THREAD, Klass::cast(m->method_holder())->protection_domain()); | |
| 1138 symbolHandle signature(THREAD, m->signature()); | |
| 1139 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { | |
| 1140 if (ss.is_object()) { | |
| 1141 symbolOop sym = ss.as_symbol(CHECK_(false)); | |
| 1142 symbolHandle name (THREAD, sym); | |
| 1143 klassOop klass = SystemDictionary::resolve_or_null(name, class_loader, | |
| 1144 protection_domain, THREAD); | |
|
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1145 // We are loading classes eagerly. If a ClassNotFoundException or |
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|
1146 // a LinkageError was generated, be sure to ignore it. |
| 0 | 1147 if (HAS_PENDING_EXCEPTION) { |
| 1142 | 1148 if (PENDING_EXCEPTION->is_a(SystemDictionary::ClassNotFoundException_klass()) || |
| 1149 PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { | |
| 0 | 1150 CLEAR_PENDING_EXCEPTION; |
| 1151 } else { | |
| 1152 return false; | |
| 1153 } | |
| 1154 } | |
| 1155 if( klass == NULL) { sig_is_loaded = false; } | |
| 1156 } | |
| 1157 } | |
| 1158 return sig_is_loaded; | |
| 1159 } | |
| 1160 | |
| 1161 bool methodOopDesc::has_unloaded_classes_in_signature(methodHandle m, TRAPS) { | |
| 1162 Handle class_loader(THREAD, instanceKlass::cast(m->method_holder())->class_loader()); | |
| 1163 Handle protection_domain(THREAD, Klass::cast(m->method_holder())->protection_domain()); | |
| 1164 symbolHandle signature(THREAD, m->signature()); | |
| 1165 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { | |
| 1166 if (ss.type() == T_OBJECT) { | |
| 1167 symbolHandle name(THREAD, ss.as_symbol_or_null()); | |
| 1168 if (name() == NULL) return true; | |
| 1169 klassOop klass = SystemDictionary::find(name, class_loader, protection_domain, THREAD); | |
| 1170 if (klass == NULL) return true; | |
| 1171 } | |
| 1172 } | |
| 1173 return false; | |
| 1174 } | |
| 1175 | |
| 1176 // Exposed so field engineers can debug VM | |
| 1177 void methodOopDesc::print_short_name(outputStream* st) { | |
| 1178 ResourceMark rm; | |
| 1179 #ifdef PRODUCT | |
| 1180 st->print(" %s::", method_holder()->klass_part()->external_name()); | |
| 1181 #else | |
| 1182 st->print(" %s::", method_holder()->klass_part()->internal_name()); | |
| 1183 #endif | |
| 1184 name()->print_symbol_on(st); | |
| 1185 if (WizardMode) signature()->print_symbol_on(st); | |
| 1186 } | |
| 1187 | |
| 1188 | |
| 1189 extern "C" { | |
| 1190 static int method_compare(methodOop* a, methodOop* b) { | |
| 1191 return (*a)->name()->fast_compare((*b)->name()); | |
| 1192 } | |
| 1193 | |
| 1194 // Prevent qsort from reordering a previous valid sort by | |
| 1195 // considering the address of the methodOops if two methods | |
| 1196 // would otherwise compare as equal. Required to preserve | |
| 1197 // optimal access order in the shared archive. Slower than | |
| 1198 // method_compare, only used for shared archive creation. | |
| 1199 static int method_compare_idempotent(methodOop* a, methodOop* b) { | |
| 1200 int i = method_compare(a, b); | |
| 1201 if (i != 0) return i; | |
| 1202 return ( a < b ? -1 : (a == b ? 0 : 1)); | |
| 1203 } | |
| 1204 | |
|
1498
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1205 // We implement special compare versions for narrow oops to avoid |
|
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1206 // testing for UseCompressedOops on every comparison. |
|
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1207 static int method_compare_narrow(narrowOop* a, narrowOop* b) { |
|
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1208 methodOop m = (methodOop)oopDesc::load_decode_heap_oop(a); |
|
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1209 methodOop n = (methodOop)oopDesc::load_decode_heap_oop(b); |
|
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1210 return m->name()->fast_compare(n->name()); |
|
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|
1211 } |
|
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1212 |
|
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1213 static int method_compare_narrow_idempotent(narrowOop* a, narrowOop* b) { |
|
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1214 int i = method_compare_narrow(a, b); |
|
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1215 if (i != 0) return i; |
|
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|
1216 return ( a < b ? -1 : (a == b ? 0 : 1)); |
|
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|
1217 } |
|
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|
1218 |
| 0 | 1219 typedef int (*compareFn)(const void*, const void*); |
| 1220 } | |
| 1221 | |
| 1222 | |
| 1223 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
| 1224 static void reorder_based_on_method_index(objArrayOop methods, | |
| 1225 objArrayOop annotations, | |
|
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1226 GrowableArray<oop>* temp_array) { |
| 0 | 1227 if (annotations == NULL) { |
| 1228 return; | |
| 1229 } | |
| 1230 | |
| 1231 int length = methods->length(); | |
| 1232 int i; | |
| 1233 // Copy to temp array | |
|
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1234 temp_array->clear(); |
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1235 for (i = 0; i < length; i++) { |
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1236 temp_array->append(annotations->obj_at(i)); |
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1237 } |
| 0 | 1238 |
| 1239 // Copy back using old method indices | |
| 1240 for (i = 0; i < length; i++) { | |
| 1241 methodOop m = (methodOop) methods->obj_at(i); | |
|
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1242 annotations->obj_at_put(i, temp_array->at(m->method_idnum())); |
| 0 | 1243 } |
| 1244 } | |
| 1245 | |
| 1246 | |
| 1247 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
| 1248 void methodOopDesc::sort_methods(objArrayOop methods, | |
| 1249 objArrayOop methods_annotations, | |
| 1250 objArrayOop methods_parameter_annotations, | |
| 1251 objArrayOop methods_default_annotations, | |
| 1252 bool idempotent) { | |
| 1253 int length = methods->length(); | |
| 1254 if (length > 1) { | |
| 1255 bool do_annotations = false; | |
| 1256 if (methods_annotations != NULL || | |
| 1257 methods_parameter_annotations != NULL || | |
| 1258 methods_default_annotations != NULL) { | |
| 1259 do_annotations = true; | |
| 1260 } | |
| 1261 if (do_annotations) { | |
| 1262 // Remember current method ordering so we can reorder annotations | |
| 1263 for (int i = 0; i < length; i++) { | |
| 1264 methodOop m = (methodOop) methods->obj_at(i); | |
| 1265 m->set_method_idnum(i); | |
| 1266 } | |
| 1267 } | |
| 1268 | |
| 1269 // Use a simple bubble sort for small number of methods since | |
| 1270 // qsort requires a functional pointer call for each comparison. | |
|
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1271 if (length < 8) { |
| 0 | 1272 bool sorted = true; |
| 1273 for (int i=length-1; i>0; i--) { | |
| 1274 for (int j=0; j<i; j++) { | |
| 1275 methodOop m1 = (methodOop)methods->obj_at(j); | |
| 1276 methodOop m2 = (methodOop)methods->obj_at(j+1); | |
| 1277 if ((uintptr_t)m1->name() > (uintptr_t)m2->name()) { | |
| 1278 methods->obj_at_put(j, m2); | |
| 1279 methods->obj_at_put(j+1, m1); | |
| 1280 sorted = false; | |
| 1281 } | |
| 1282 } | |
| 1283 if (sorted) break; | |
|
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1284 sorted = true; |
| 0 | 1285 } |
| 1286 } else { | |
|
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1287 compareFn compare = |
|
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1288 (UseCompressedOops ? |
|
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1289 (compareFn) (idempotent ? method_compare_narrow_idempotent : method_compare_narrow): |
|
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1290 (compareFn) (idempotent ? method_compare_idempotent : method_compare)); |
|
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1291 qsort(methods->base(), length, heapOopSize, compare); |
| 0 | 1292 } |
| 1293 | |
| 1294 // Sort annotations if necessary | |
| 1295 assert(methods_annotations == NULL || methods_annotations->length() == methods->length(), ""); | |
| 1296 assert(methods_parameter_annotations == NULL || methods_parameter_annotations->length() == methods->length(), ""); | |
| 1297 assert(methods_default_annotations == NULL || methods_default_annotations->length() == methods->length(), ""); | |
| 1298 if (do_annotations) { | |
|
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1299 ResourceMark rm; |
| 0 | 1300 // Allocate temporary storage |
|
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1301 GrowableArray<oop>* temp_array = new GrowableArray<oop>(length); |
| 0 | 1302 reorder_based_on_method_index(methods, methods_annotations, temp_array); |
| 1303 reorder_based_on_method_index(methods, methods_parameter_annotations, temp_array); | |
| 1304 reorder_based_on_method_index(methods, methods_default_annotations, temp_array); | |
| 1305 } | |
| 1306 | |
| 1307 // Reset method ordering | |
| 1308 for (int i = 0; i < length; i++) { | |
| 1309 methodOop m = (methodOop) methods->obj_at(i); | |
| 1310 m->set_method_idnum(i); | |
| 1311 } | |
| 1312 } | |
| 1313 } | |
| 1314 | |
| 1315 | |
| 1316 //----------------------------------------------------------------------------------- | |
| 1317 // Non-product code | |
| 1318 | |
| 1319 #ifndef PRODUCT | |
| 1320 class SignatureTypePrinter : public SignatureTypeNames { | |
| 1321 private: | |
| 1322 outputStream* _st; | |
| 1323 bool _use_separator; | |
| 1324 | |
| 1325 void type_name(const char* name) { | |
| 1326 if (_use_separator) _st->print(", "); | |
| 1327 _st->print(name); | |
| 1328 _use_separator = true; | |
| 1329 } | |
| 1330 | |
| 1331 public: | |
| 1332 SignatureTypePrinter(symbolHandle signature, outputStream* st) : SignatureTypeNames(signature) { | |
| 1333 _st = st; | |
| 1334 _use_separator = false; | |
| 1335 } | |
| 1336 | |
| 1337 void print_parameters() { _use_separator = false; iterate_parameters(); } | |
| 1338 void print_returntype() { _use_separator = false; iterate_returntype(); } | |
| 1339 }; | |
| 1340 | |
| 1341 | |
| 1342 void methodOopDesc::print_name(outputStream* st) { | |
| 1343 Thread *thread = Thread::current(); | |
| 1344 ResourceMark rm(thread); | |
| 1345 SignatureTypePrinter sig(signature(), st); | |
| 1346 st->print("%s ", is_static() ? "static" : "virtual"); | |
| 1347 sig.print_returntype(); | |
| 1348 st->print(" %s.", method_holder()->klass_part()->internal_name()); | |
| 1349 name()->print_symbol_on(st); | |
| 1350 st->print("("); | |
| 1351 sig.print_parameters(); | |
| 1352 st->print(")"); | |
| 1353 } | |
| 1354 | |
| 1355 | |
| 1356 void methodOopDesc::print_codes_on(outputStream* st) const { | |
| 1357 print_codes_on(0, code_size(), st); | |
| 1358 } | |
| 1359 | |
| 1360 void methodOopDesc::print_codes_on(int from, int to, outputStream* st) const { | |
| 1361 Thread *thread = Thread::current(); | |
| 1362 ResourceMark rm(thread); | |
| 1363 methodHandle mh (thread, (methodOop)this); | |
| 1364 BytecodeStream s(mh); | |
| 1365 s.set_interval(from, to); | |
| 1366 BytecodeTracer::set_closure(BytecodeTracer::std_closure()); | |
| 1367 while (s.next() >= 0) BytecodeTracer::trace(mh, s.bcp(), st); | |
| 1368 } | |
| 1369 #endif // not PRODUCT | |
| 1370 | |
| 1371 | |
| 1372 // Simple compression of line number tables. We use a regular compressed stream, except that we compress deltas | |
| 1373 // between (bci,line) pairs since they are smaller. If (bci delta, line delta) fits in (5-bit unsigned, 3-bit unsigned) | |
| 1374 // we save it as one byte, otherwise we write a 0xFF escape character and use regular compression. 0x0 is used | |
| 1375 // as end-of-stream terminator. | |
| 1376 | |
| 1377 void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) { | |
| 1378 // bci and line number does not compress into single byte. | |
| 1379 // Write out escape character and use regular compression for bci and line number. | |
| 1380 write_byte((jubyte)0xFF); | |
| 1381 write_signed_int(bci_delta); | |
| 1382 write_signed_int(line_delta); | |
| 1383 } | |
| 1384 | |
| 1385 // See comment in methodOop.hpp which explains why this exists. | |
| 1386 #if defined(_M_AMD64) && MSC_VER >= 1400 | |
| 1387 #pragma optimize("", off) | |
| 1388 void CompressedLineNumberWriteStream::write_pair(int bci, int line) { | |
| 1389 write_pair_inline(bci, line); | |
| 1390 } | |
| 1391 #pragma optimize("", on) | |
| 1392 #endif | |
| 1393 | |
| 1394 CompressedLineNumberReadStream::CompressedLineNumberReadStream(u_char* buffer) : CompressedReadStream(buffer) { | |
| 1395 _bci = 0; | |
| 1396 _line = 0; | |
| 1397 }; | |
| 1398 | |
| 1399 | |
| 1400 bool CompressedLineNumberReadStream::read_pair() { | |
| 1401 jubyte next = read_byte(); | |
| 1402 // Check for terminator | |
| 1403 if (next == 0) return false; | |
| 1404 if (next == 0xFF) { | |
| 1405 // Escape character, regular compression used | |
| 1406 _bci += read_signed_int(); | |
| 1407 _line += read_signed_int(); | |
| 1408 } else { | |
| 1409 // Single byte compression used | |
| 1410 _bci += next >> 3; | |
| 1411 _line += next & 0x7; | |
| 1412 } | |
| 1413 return true; | |
| 1414 } | |
| 1415 | |
| 1416 | |
| 1417 Bytecodes::Code methodOopDesc::orig_bytecode_at(int bci) { | |
| 1418 BreakpointInfo* bp = instanceKlass::cast(method_holder())->breakpoints(); | |
| 1419 for (; bp != NULL; bp = bp->next()) { | |
| 1420 if (bp->match(this, bci)) { | |
| 1421 return bp->orig_bytecode(); | |
| 1422 } | |
| 1423 } | |
| 1424 ShouldNotReachHere(); | |
| 1425 return Bytecodes::_shouldnotreachhere; | |
| 1426 } | |
| 1427 | |
| 1428 void methodOopDesc::set_orig_bytecode_at(int bci, Bytecodes::Code code) { | |
| 1429 assert(code != Bytecodes::_breakpoint, "cannot patch breakpoints this way"); | |
| 1430 BreakpointInfo* bp = instanceKlass::cast(method_holder())->breakpoints(); | |
| 1431 for (; bp != NULL; bp = bp->next()) { | |
| 1432 if (bp->match(this, bci)) { | |
| 1433 bp->set_orig_bytecode(code); | |
| 1434 // and continue, in case there is more than one | |
| 1435 } | |
| 1436 } | |
| 1437 } | |
| 1438 | |
| 1439 void methodOopDesc::set_breakpoint(int bci) { | |
| 1440 instanceKlass* ik = instanceKlass::cast(method_holder()); | |
| 1441 BreakpointInfo *bp = new BreakpointInfo(this, bci); | |
| 1442 bp->set_next(ik->breakpoints()); | |
| 1443 ik->set_breakpoints(bp); | |
| 1444 // do this last: | |
| 1445 bp->set(this); | |
| 1446 } | |
| 1447 | |
| 1448 static void clear_matches(methodOop m, int bci) { | |
| 1449 instanceKlass* ik = instanceKlass::cast(m->method_holder()); | |
| 1450 BreakpointInfo* prev_bp = NULL; | |
| 1451 BreakpointInfo* next_bp; | |
| 1452 for (BreakpointInfo* bp = ik->breakpoints(); bp != NULL; bp = next_bp) { | |
| 1453 next_bp = bp->next(); | |
| 1454 // bci value of -1 is used to delete all breakpoints in method m (ex: clear_all_breakpoint). | |
| 1455 if (bci >= 0 ? bp->match(m, bci) : bp->match(m)) { | |
| 1456 // do this first: | |
| 1457 bp->clear(m); | |
| 1458 // unhook it | |
| 1459 if (prev_bp != NULL) | |
| 1460 prev_bp->set_next(next_bp); | |
| 1461 else | |
| 1462 ik->set_breakpoints(next_bp); | |
| 1463 delete bp; | |
| 1464 // When class is redefined JVMTI sets breakpoint in all versions of EMCP methods | |
| 1465 // at same location. So we have multiple matching (method_index and bci) | |
| 1466 // BreakpointInfo nodes in BreakpointInfo list. We should just delete one | |
| 1467 // breakpoint for clear_breakpoint request and keep all other method versions | |
| 1468 // BreakpointInfo for future clear_breakpoint request. | |
| 1469 // bcivalue of -1 is used to clear all breakpoints (see clear_all_breakpoints) | |
| 1470 // which is being called when class is unloaded. We delete all the Breakpoint | |
| 1471 // information for all versions of method. We may not correctly restore the original | |
| 1472 // bytecode in all method versions, but that is ok. Because the class is being unloaded | |
| 1473 // so these methods won't be used anymore. | |
| 1474 if (bci >= 0) { | |
| 1475 break; | |
| 1476 } | |
| 1477 } else { | |
| 1478 // This one is a keeper. | |
| 1479 prev_bp = bp; | |
| 1480 } | |
| 1481 } | |
| 1482 } | |
| 1483 | |
| 1484 void methodOopDesc::clear_breakpoint(int bci) { | |
| 1485 assert(bci >= 0, ""); | |
| 1486 clear_matches(this, bci); | |
| 1487 } | |
| 1488 | |
| 1489 void methodOopDesc::clear_all_breakpoints() { | |
| 1490 clear_matches(this, -1); | |
| 1491 } | |
| 1492 | |
| 1493 | |
| 1783 | 1494 int methodOopDesc::invocation_count() { |
| 1495 if (TieredCompilation) { | |
| 1496 const methodDataOop mdo = method_data(); | |
| 1497 if (invocation_counter()->carry() || ((mdo != NULL) ? mdo->invocation_counter()->carry() : false)) { | |
| 1498 return InvocationCounter::count_limit; | |
| 1499 } else { | |
| 1500 return invocation_counter()->count() + ((mdo != NULL) ? mdo->invocation_counter()->count() : 0); | |
| 1501 } | |
| 1502 } else { | |
| 1503 return invocation_counter()->count(); | |
| 1504 } | |
| 1505 } | |
| 1506 | |
| 1507 int methodOopDesc::backedge_count() { | |
| 1508 if (TieredCompilation) { | |
| 1509 const methodDataOop mdo = method_data(); | |
| 1510 if (backedge_counter()->carry() || ((mdo != NULL) ? mdo->backedge_counter()->carry() : false)) { | |
| 1511 return InvocationCounter::count_limit; | |
| 1512 } else { | |
| 1513 return backedge_counter()->count() + ((mdo != NULL) ? mdo->backedge_counter()->count() : 0); | |
| 1514 } | |
| 1515 } else { | |
| 1516 return backedge_counter()->count(); | |
| 1517 } | |
| 1518 } | |
| 1519 | |
| 1520 int methodOopDesc::highest_comp_level() const { | |
| 1521 methodDataOop mdo = method_data(); | |
| 1522 if (mdo != NULL) { | |
| 1523 return mdo->highest_comp_level(); | |
| 1524 } else { | |
| 1525 return CompLevel_none; | |
| 1526 } | |
| 1527 } | |
| 1528 | |
| 1529 int methodOopDesc::highest_osr_comp_level() const { | |
| 1530 methodDataOop mdo = method_data(); | |
| 1531 if (mdo != NULL) { | |
| 1532 return mdo->highest_osr_comp_level(); | |
| 1533 } else { | |
| 1534 return CompLevel_none; | |
| 1535 } | |
| 1536 } | |
| 1537 | |
| 1538 void methodOopDesc::set_highest_comp_level(int level) { | |
| 1539 methodDataOop mdo = method_data(); | |
| 1540 if (mdo != NULL) { | |
| 1541 mdo->set_highest_comp_level(level); | |
| 1542 } | |
| 1543 } | |
| 1544 | |
| 1545 void methodOopDesc::set_highest_osr_comp_level(int level) { | |
| 1546 methodDataOop mdo = method_data(); | |
| 1547 if (mdo != NULL) { | |
| 1548 mdo->set_highest_osr_comp_level(level); | |
| 1549 } | |
| 1550 } | |
| 1551 | |
| 0 | 1552 BreakpointInfo::BreakpointInfo(methodOop m, int bci) { |
| 1553 _bci = bci; | |
| 1554 _name_index = m->name_index(); | |
| 1555 _signature_index = m->signature_index(); | |
| 1556 _orig_bytecode = (Bytecodes::Code) *m->bcp_from(_bci); | |
| 1557 if (_orig_bytecode == Bytecodes::_breakpoint) | |
| 1558 _orig_bytecode = m->orig_bytecode_at(_bci); | |
| 1559 _next = NULL; | |
| 1560 } | |
| 1561 | |
| 1562 void BreakpointInfo::set(methodOop method) { | |
| 1563 #ifdef ASSERT | |
| 1564 { | |
| 1565 Bytecodes::Code code = (Bytecodes::Code) *method->bcp_from(_bci); | |
| 1566 if (code == Bytecodes::_breakpoint) | |
| 1567 code = method->orig_bytecode_at(_bci); | |
| 1568 assert(orig_bytecode() == code, "original bytecode must be the same"); | |
| 1569 } | |
| 1570 #endif | |
| 1571 *method->bcp_from(_bci) = Bytecodes::_breakpoint; | |
| 1572 method->incr_number_of_breakpoints(); | |
| 1573 SystemDictionary::notice_modification(); | |
| 1574 { | |
| 1575 // Deoptimize all dependents on this method | |
| 1576 Thread *thread = Thread::current(); | |
| 1577 HandleMark hm(thread); | |
| 1578 methodHandle mh(thread, method); | |
| 1579 Universe::flush_dependents_on_method(mh); | |
| 1580 } | |
| 1581 } | |
| 1582 | |
| 1583 void BreakpointInfo::clear(methodOop method) { | |
| 1584 *method->bcp_from(_bci) = orig_bytecode(); | |
| 1585 assert(method->number_of_breakpoints() > 0, "must not go negative"); | |
| 1586 method->decr_number_of_breakpoints(); | |
| 1587 } |