Mercurial > hg > truffle
annotate src/share/vm/oops/methodOop.cpp @ 6213:8150fa46d2ed
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 | eba1d5bce9e8 |
| children | 161ae369407d |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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" | |
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41 #include "oops/symbol.hpp" |
| 1972 | 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" | |
| 3779 | 52 #include "utilities/quickSort.hpp" |
| 1972 | 53 #include "utilities/xmlstream.hpp" |
| 0 | 54 |
| 55 | |
| 56 // Implementation of methodOopDesc | |
| 57 | |
| 58 address methodOopDesc::get_i2c_entry() { | |
| 59 assert(_adapter != NULL, "must have"); | |
| 60 return _adapter->get_i2c_entry(); | |
| 61 } | |
| 62 | |
| 63 address methodOopDesc::get_c2i_entry() { | |
| 64 assert(_adapter != NULL, "must have"); | |
| 65 return _adapter->get_c2i_entry(); | |
| 66 } | |
| 67 | |
| 68 address methodOopDesc::get_c2i_unverified_entry() { | |
| 69 assert(_adapter != NULL, "must have"); | |
| 70 return _adapter->get_c2i_unverified_entry(); | |
| 71 } | |
| 72 | |
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73 char* methodOopDesc::name_and_sig_as_C_string() const { |
| 0 | 74 return name_and_sig_as_C_string(Klass::cast(constants()->pool_holder()), name(), signature()); |
| 75 } | |
| 76 | |
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77 char* methodOopDesc::name_and_sig_as_C_string(char* buf, int size) const { |
| 0 | 78 return name_and_sig_as_C_string(Klass::cast(constants()->pool_holder()), name(), signature(), buf, size); |
| 79 } | |
| 80 | |
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81 char* methodOopDesc::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature) { |
| 0 | 82 const char* klass_name = klass->external_name(); |
| 83 int klass_name_len = (int)strlen(klass_name); | |
| 84 int method_name_len = method_name->utf8_length(); | |
| 85 int len = klass_name_len + 1 + method_name_len + signature->utf8_length(); | |
| 86 char* dest = NEW_RESOURCE_ARRAY(char, len + 1); | |
| 87 strcpy(dest, klass_name); | |
| 88 dest[klass_name_len] = '.'; | |
| 89 strcpy(&dest[klass_name_len + 1], method_name->as_C_string()); | |
| 90 strcpy(&dest[klass_name_len + 1 + method_name_len], signature->as_C_string()); | |
| 91 dest[len] = 0; | |
| 92 return dest; | |
| 93 } | |
| 94 | |
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95 char* methodOopDesc::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size) { |
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96 Symbol* klass_name = klass->name(); |
| 0 | 97 klass_name->as_klass_external_name(buf, size); |
| 98 int len = (int)strlen(buf); | |
| 99 | |
| 100 if (len < size - 1) { | |
| 101 buf[len++] = '.'; | |
| 102 | |
| 103 method_name->as_C_string(&(buf[len]), size - len); | |
| 104 len = (int)strlen(buf); | |
| 105 | |
| 106 signature->as_C_string(&(buf[len]), size - len); | |
| 107 } | |
| 108 | |
| 109 return buf; | |
| 110 } | |
| 111 | |
| 112 int methodOopDesc::fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS) { | |
| 113 // exception table holds quadruple entries of the form (beg_bci, end_bci, handler_bci, klass_index) | |
| 114 // access exception table | |
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115 ExceptionTable table(this); |
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116 int length = table.length(); |
| 0 | 117 // iterate through all entries sequentially |
| 118 constantPoolHandle pool(THREAD, constants()); | |
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119 for (int i = 0; i < length; i ++) { |
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120 //reacquire the table in case a GC happened |
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121 ExceptionTable table(this); |
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122 int beg_bci = table.start_pc(i); |
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123 int end_bci = table.end_pc(i); |
| 0 | 124 assert(beg_bci <= end_bci, "inconsistent exception table"); |
| 125 if (beg_bci <= throw_bci && throw_bci < end_bci) { | |
| 126 // exception handler bci range covers throw_bci => investigate further | |
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127 int handler_bci = table.handler_pc(i); |
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128 int klass_index = table.catch_type_index(i); |
| 0 | 129 if (klass_index == 0) { |
| 130 return handler_bci; | |
| 131 } else if (ex_klass.is_null()) { | |
| 132 return handler_bci; | |
| 133 } else { | |
| 134 // we know the exception class => get the constraint class | |
| 135 // this may require loading of the constraint class; if verification | |
| 136 // fails or some other exception occurs, return handler_bci | |
| 137 klassOop k = pool->klass_at(klass_index, CHECK_(handler_bci)); | |
| 138 KlassHandle klass = KlassHandle(THREAD, k); | |
| 139 assert(klass.not_null(), "klass not loaded"); | |
| 140 if (ex_klass->is_subtype_of(klass())) { | |
| 141 return handler_bci; | |
| 142 } | |
| 143 } | |
| 144 } | |
| 145 } | |
| 146 | |
| 147 return -1; | |
| 148 } | |
| 149 | |
| 150 void methodOopDesc::mask_for(int bci, InterpreterOopMap* mask) { | |
| 151 | |
| 152 Thread* myThread = Thread::current(); | |
| 153 methodHandle h_this(myThread, this); | |
| 154 #ifdef ASSERT | |
| 155 bool has_capability = myThread->is_VM_thread() || | |
| 156 myThread->is_ConcurrentGC_thread() || | |
| 157 myThread->is_GC_task_thread(); | |
| 158 | |
| 159 if (!has_capability) { | |
| 160 if (!VerifyStack && !VerifyLastFrame) { | |
| 161 // verify stack calls this outside VM thread | |
| 162 warning("oopmap should only be accessed by the " | |
| 163 "VM, GC task or CMS threads (or during debugging)"); | |
| 164 InterpreterOopMap local_mask; | |
| 165 instanceKlass::cast(method_holder())->mask_for(h_this, bci, &local_mask); | |
| 166 local_mask.print(); | |
| 167 } | |
| 168 } | |
| 169 #endif | |
| 170 instanceKlass::cast(method_holder())->mask_for(h_this, bci, mask); | |
| 171 return; | |
| 172 } | |
| 173 | |
| 174 | |
| 175 int methodOopDesc::bci_from(address bcp) const { | |
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176 assert(is_native() && bcp == code_base() || contains(bcp) || is_error_reported(), |
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177 err_msg("bcp doesn't belong to this method: bcp: " INTPTR_FORMAT ", method: %s", bcp, name_and_sig_as_C_string())); |
| 0 | 178 return bcp - code_base(); |
| 179 } | |
| 180 | |
| 181 | |
| 182 // Return (int)bcx if it appears to be a valid BCI. | |
| 183 // Return bci_from((address)bcx) if it appears to be a valid BCP. | |
| 184 // Return -1 otherwise. | |
| 185 // Used by profiling code, when invalid data is a possibility. | |
| 186 // The caller is responsible for validating the methodOop itself. | |
| 187 int methodOopDesc::validate_bci_from_bcx(intptr_t bcx) const { | |
| 188 // keep bci as -1 if not a valid bci | |
| 189 int bci = -1; | |
| 190 if (bcx == 0 || (address)bcx == code_base()) { | |
| 191 // code_size() may return 0 and we allow 0 here | |
| 192 // the method may be native | |
| 193 bci = 0; | |
| 194 } else if (frame::is_bci(bcx)) { | |
| 195 if (bcx < code_size()) { | |
| 196 bci = (int)bcx; | |
| 197 } | |
| 198 } else if (contains((address)bcx)) { | |
| 199 bci = (address)bcx - code_base(); | |
| 200 } | |
| 201 // Assert that if we have dodged any asserts, bci is negative. | |
| 202 assert(bci == -1 || bci == bci_from(bcp_from(bci)), "sane bci if >=0"); | |
| 203 return bci; | |
| 204 } | |
| 205 | |
| 206 address methodOopDesc::bcp_from(int bci) const { | |
| 207 assert((is_native() && bci == 0) || (!is_native() && 0 <= bci && bci < code_size()), "illegal bci"); | |
| 208 address bcp = code_base() + bci; | |
| 209 assert(is_native() && bcp == code_base() || contains(bcp), "bcp doesn't belong to this method"); | |
| 210 return bcp; | |
| 211 } | |
| 212 | |
| 213 | |
| 214 int methodOopDesc::object_size(bool is_native) { | |
| 215 // If native, then include pointers for native_function and signature_handler | |
| 216 int extra_bytes = (is_native) ? 2*sizeof(address*) : 0; | |
| 217 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; | |
| 218 return align_object_size(header_size() + extra_words); | |
| 219 } | |
| 220 | |
| 221 | |
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222 Symbol* methodOopDesc::klass_name() const { |
| 0 | 223 klassOop k = method_holder(); |
| 224 assert(k->is_klass(), "must be klass"); | |
| 225 instanceKlass* ik = (instanceKlass*) k->klass_part(); | |
| 226 return ik->name(); | |
| 227 } | |
| 228 | |
| 229 | |
| 230 void methodOopDesc::set_interpreter_kind() { | |
| 231 int kind = Interpreter::method_kind(methodOop(this)); | |
| 232 assert(kind != Interpreter::invalid, | |
| 233 "interpreter entry must be valid"); | |
| 234 set_interpreter_kind(kind); | |
| 235 } | |
| 236 | |
| 237 | |
| 238 // Attempt to return method oop to original state. Clear any pointers | |
| 239 // (to objects outside the shared spaces). We won't be able to predict | |
| 240 // where they should point in a new JVM. Further initialize some | |
| 241 // entries now in order allow them to be write protected later. | |
| 242 | |
| 243 void methodOopDesc::remove_unshareable_info() { | |
| 244 unlink_method(); | |
| 245 set_interpreter_kind(); | |
| 246 } | |
| 247 | |
| 248 | |
| 1783 | 249 bool methodOopDesc::was_executed_more_than(int n) { |
| 0 | 250 // Invocation counter is reset when the methodOop is compiled. |
| 251 // If the method has compiled code we therefore assume it has | |
| 252 // be excuted more than n times. | |
| 253 if (is_accessor() || is_empty_method() || (code() != NULL)) { | |
| 254 // interpreter doesn't bump invocation counter of trivial methods | |
| 255 // compiler does not bump invocation counter of compiled methods | |
| 256 return true; | |
| 1783 | 257 } |
| 258 else if (_invocation_counter.carry() || (method_data() != NULL && method_data()->invocation_counter()->carry())) { | |
| 0 | 259 // The carry bit is set when the counter overflows and causes |
| 260 // a compilation to occur. We don't know how many times | |
| 261 // the counter has been reset, so we simply assume it has | |
| 262 // been executed more than n times. | |
| 263 return true; | |
| 264 } else { | |
| 265 return invocation_count() > n; | |
| 266 } | |
| 267 } | |
| 268 | |
| 269 #ifndef PRODUCT | |
| 1783 | 270 void methodOopDesc::print_invocation_count() { |
| 0 | 271 if (is_static()) tty->print("static "); |
| 272 if (is_final()) tty->print("final "); | |
| 273 if (is_synchronized()) tty->print("synchronized "); | |
| 274 if (is_native()) tty->print("native "); | |
| 275 method_holder()->klass_part()->name()->print_symbol_on(tty); | |
| 276 tty->print("."); | |
| 277 name()->print_symbol_on(tty); | |
| 278 signature()->print_symbol_on(tty); | |
| 279 | |
| 280 if (WizardMode) { | |
| 281 // dump the size of the byte codes | |
| 282 tty->print(" {%d}", code_size()); | |
| 283 } | |
| 284 tty->cr(); | |
| 285 | |
| 286 tty->print_cr (" interpreter_invocation_count: %8d ", interpreter_invocation_count()); | |
| 287 tty->print_cr (" invocation_counter: %8d ", invocation_count()); | |
| 288 tty->print_cr (" backedge_counter: %8d ", backedge_count()); | |
| 289 if (CountCompiledCalls) { | |
| 290 tty->print_cr (" compiled_invocation_count: %8d ", compiled_invocation_count()); | |
| 291 } | |
| 292 | |
| 293 } | |
| 294 #endif | |
| 295 | |
| 296 // Build a methodDataOop object to hold information about this method | |
| 297 // collected in the interpreter. | |
| 298 void methodOopDesc::build_interpreter_method_data(methodHandle method, TRAPS) { | |
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299 // Do not profile method if current thread holds the pending list lock, |
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300 // which avoids deadlock for acquiring the MethodData_lock. |
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301 if (instanceRefKlass::owns_pending_list_lock((JavaThread*)THREAD)) { |
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302 return; |
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303 } |
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304 |
| 0 | 305 // Grab a lock here to prevent multiple |
| 306 // methodDataOops from being created. | |
| 307 MutexLocker ml(MethodData_lock, THREAD); | |
| 308 if (method->method_data() == NULL) { | |
| 309 methodDataOop method_data = oopFactory::new_methodData(method, CHECK); | |
| 310 method->set_method_data(method_data); | |
| 311 if (PrintMethodData && (Verbose || WizardMode)) { | |
| 312 ResourceMark rm(THREAD); | |
| 313 tty->print("build_interpreter_method_data for "); | |
| 314 method->print_name(tty); | |
| 315 tty->cr(); | |
| 316 // At the end of the run, the MDO, full of data, will be dumped. | |
| 317 } | |
| 318 } | |
| 319 } | |
| 320 | |
| 321 void methodOopDesc::cleanup_inline_caches() { | |
| 322 // The current system doesn't use inline caches in the interpreter | |
| 323 // => nothing to do (keep this method around for future use) | |
| 324 } | |
| 325 | |
| 326 | |
| 710 | 327 int methodOopDesc::extra_stack_words() { |
| 328 // not an inline function, to avoid a header dependency on Interpreter | |
| 1506 | 329 return extra_stack_entries() * Interpreter::stackElementSize; |
| 710 | 330 } |
| 331 | |
| 332 | |
| 0 | 333 void methodOopDesc::compute_size_of_parameters(Thread *thread) { |
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334 ArgumentSizeComputer asc(signature()); |
| 0 | 335 set_size_of_parameters(asc.size() + (is_static() ? 0 : 1)); |
| 336 } | |
| 337 | |
| 338 #ifdef CC_INTERP | |
| 339 void methodOopDesc::set_result_index(BasicType type) { | |
| 340 _result_index = Interpreter::BasicType_as_index(type); | |
| 341 } | |
| 342 #endif | |
| 343 | |
| 344 BasicType methodOopDesc::result_type() const { | |
| 345 ResultTypeFinder rtf(signature()); | |
| 346 return rtf.type(); | |
| 347 } | |
| 348 | |
| 349 | |
| 350 bool methodOopDesc::is_empty_method() const { | |
| 351 return code_size() == 1 | |
| 352 && *code_base() == Bytecodes::_return; | |
| 353 } | |
| 354 | |
| 355 | |
| 356 bool methodOopDesc::is_vanilla_constructor() const { | |
| 357 // Returns true if this method is a vanilla constructor, i.e. an "<init>" "()V" method | |
| 358 // which only calls the superclass vanilla constructor and possibly does stores of | |
| 359 // zero constants to local fields: | |
| 360 // | |
| 361 // aload_0 | |
| 362 // invokespecial | |
| 363 // indexbyte1 | |
| 364 // indexbyte2 | |
| 365 // | |
| 366 // followed by an (optional) sequence of: | |
| 367 // | |
| 368 // aload_0 | |
| 369 // aconst_null / iconst_0 / fconst_0 / dconst_0 | |
| 370 // putfield | |
| 371 // indexbyte1 | |
| 372 // indexbyte2 | |
| 373 // | |
| 374 // followed by: | |
| 375 // | |
| 376 // return | |
| 377 | |
| 378 assert(name() == vmSymbols::object_initializer_name(), "Should only be called for default constructors"); | |
| 379 assert(signature() == vmSymbols::void_method_signature(), "Should only be called for default constructors"); | |
| 380 int size = code_size(); | |
| 381 // Check if size match | |
| 382 if (size == 0 || size % 5 != 0) return false; | |
| 383 address cb = code_base(); | |
| 384 int last = size - 1; | |
| 385 if (cb[0] != Bytecodes::_aload_0 || cb[1] != Bytecodes::_invokespecial || cb[last] != Bytecodes::_return) { | |
| 386 // Does not call superclass default constructor | |
| 387 return false; | |
| 388 } | |
| 389 // Check optional sequence | |
| 390 for (int i = 4; i < last; i += 5) { | |
| 391 if (cb[i] != Bytecodes::_aload_0) return false; | |
| 392 if (!Bytecodes::is_zero_const(Bytecodes::cast(cb[i+1]))) return false; | |
| 393 if (cb[i+2] != Bytecodes::_putfield) return false; | |
| 394 } | |
| 395 return true; | |
| 396 } | |
| 397 | |
| 398 | |
| 399 bool methodOopDesc::compute_has_loops_flag() { | |
| 400 BytecodeStream bcs(methodOop(this)); | |
| 401 Bytecodes::Code bc; | |
| 402 | |
| 403 while ((bc = bcs.next()) >= 0) { | |
| 404 switch( bc ) { | |
| 405 case Bytecodes::_ifeq: | |
| 406 case Bytecodes::_ifnull: | |
| 407 case Bytecodes::_iflt: | |
| 408 case Bytecodes::_ifle: | |
| 409 case Bytecodes::_ifne: | |
| 410 case Bytecodes::_ifnonnull: | |
| 411 case Bytecodes::_ifgt: | |
| 412 case Bytecodes::_ifge: | |
| 413 case Bytecodes::_if_icmpeq: | |
| 414 case Bytecodes::_if_icmpne: | |
| 415 case Bytecodes::_if_icmplt: | |
| 416 case Bytecodes::_if_icmpgt: | |
| 417 case Bytecodes::_if_icmple: | |
| 418 case Bytecodes::_if_icmpge: | |
| 419 case Bytecodes::_if_acmpeq: | |
| 420 case Bytecodes::_if_acmpne: | |
| 421 case Bytecodes::_goto: | |
| 422 case Bytecodes::_jsr: | |
| 423 if( bcs.dest() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
| 424 break; | |
| 425 | |
| 426 case Bytecodes::_goto_w: | |
| 427 case Bytecodes::_jsr_w: | |
| 428 if( bcs.dest_w() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
| 429 break; | |
| 430 } | |
| 431 } | |
| 432 _access_flags.set_loops_flag_init(); | |
| 433 return _access_flags.has_loops(); | |
| 434 } | |
| 435 | |
| 436 | |
| 437 bool methodOopDesc::is_final_method() const { | |
| 438 // %%% Should return true for private methods also, | |
| 439 // since there is no way to override them. | |
| 440 return is_final() || Klass::cast(method_holder())->is_final(); | |
| 441 } | |
| 442 | |
| 443 | |
| 444 bool methodOopDesc::is_strict_method() const { | |
| 445 return is_strict(); | |
| 446 } | |
| 447 | |
| 448 | |
| 449 bool methodOopDesc::can_be_statically_bound() const { | |
| 450 if (is_final_method()) return true; | |
| 451 return vtable_index() == nonvirtual_vtable_index; | |
| 452 } | |
| 453 | |
| 454 | |
| 455 bool methodOopDesc::is_accessor() const { | |
| 456 if (code_size() != 5) return false; | |
| 457 if (size_of_parameters() != 1) return false; | |
| 2142 | 458 if (java_code_at(0) != Bytecodes::_aload_0 ) return false; |
| 459 if (java_code_at(1) != Bytecodes::_getfield) return false; | |
| 460 if (java_code_at(4) != Bytecodes::_areturn && | |
| 461 java_code_at(4) != Bytecodes::_ireturn ) return false; | |
| 0 | 462 return true; |
| 463 } | |
| 464 | |
| 465 | |
| 466 bool methodOopDesc::is_initializer() const { | |
|
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467 return name() == vmSymbols::object_initializer_name() || is_static_initializer(); |
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468 } |
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469 |
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470 bool methodOopDesc::has_valid_initializer_flags() const { |
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471 return (is_static() || |
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472 instanceKlass::cast(method_holder())->major_version() < 51); |
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473 } |
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474 |
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475 bool methodOopDesc::is_static_initializer() const { |
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476 // For classfiles version 51 or greater, ensure that the clinit method is |
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477 // static. Non-static methods with the name "<clinit>" are not static |
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478 // initializers. (older classfiles exempted for backward compatibility) |
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479 return name() == vmSymbols::class_initializer_name() && |
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480 has_valid_initializer_flags(); |
| 0 | 481 } |
| 482 | |
| 483 | |
| 484 objArrayHandle methodOopDesc::resolved_checked_exceptions_impl(methodOop this_oop, TRAPS) { | |
| 485 int length = this_oop->checked_exceptions_length(); | |
| 486 if (length == 0) { // common case | |
| 487 return objArrayHandle(THREAD, Universe::the_empty_class_klass_array()); | |
| 488 } else { | |
| 489 methodHandle h_this(THREAD, this_oop); | |
| 1142 | 490 objArrayOop m_oop = oopFactory::new_objArray(SystemDictionary::Class_klass(), length, CHECK_(objArrayHandle())); |
| 0 | 491 objArrayHandle mirrors (THREAD, m_oop); |
| 492 for (int i = 0; i < length; i++) { | |
| 493 CheckedExceptionElement* table = h_this->checked_exceptions_start(); // recompute on each iteration, not gc safe | |
| 494 klassOop k = h_this->constants()->klass_at(table[i].class_cp_index, CHECK_(objArrayHandle())); | |
| 1142 | 495 assert(Klass::cast(k)->is_subclass_of(SystemDictionary::Throwable_klass()), "invalid exception class"); |
| 0 | 496 mirrors->obj_at_put(i, Klass::cast(k)->java_mirror()); |
| 497 } | |
| 498 return mirrors; | |
| 499 } | |
| 500 }; | |
| 501 | |
| 502 | |
| 503 int methodOopDesc::line_number_from_bci(int bci) const { | |
| 504 if (bci == SynchronizationEntryBCI) bci = 0; | |
| 505 assert(bci == 0 || 0 <= bci && bci < code_size(), "illegal bci"); | |
| 506 int best_bci = 0; | |
| 507 int best_line = -1; | |
| 508 | |
| 509 if (has_linenumber_table()) { | |
| 510 // The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
| 511 // Not necessarily sorted and not necessarily one-to-one. | |
| 512 CompressedLineNumberReadStream stream(compressed_linenumber_table()); | |
| 513 while (stream.read_pair()) { | |
| 514 if (stream.bci() == bci) { | |
| 515 // perfect match | |
| 516 return stream.line(); | |
| 517 } else { | |
| 518 // update best_bci/line | |
| 519 if (stream.bci() < bci && stream.bci() >= best_bci) { | |
| 520 best_bci = stream.bci(); | |
| 521 best_line = stream.line(); | |
| 522 } | |
| 523 } | |
| 524 } | |
| 525 } | |
| 526 return best_line; | |
| 527 } | |
| 528 | |
| 529 | |
| 530 bool methodOopDesc::is_klass_loaded_by_klass_index(int klass_index) const { | |
|
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531 if( constants()->tag_at(klass_index).is_unresolved_klass() ) { |
| 0 | 532 Thread *thread = Thread::current(); |
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533 Symbol* klass_name = constants()->klass_name_at(klass_index); |
| 0 | 534 Handle loader(thread, instanceKlass::cast(method_holder())->class_loader()); |
| 535 Handle prot (thread, Klass::cast(method_holder())->protection_domain()); | |
| 536 return SystemDictionary::find(klass_name, loader, prot, thread) != NULL; | |
| 537 } else { | |
| 538 return true; | |
| 539 } | |
| 540 } | |
| 541 | |
| 542 | |
| 543 bool methodOopDesc::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { | |
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544 int klass_index = constants()->klass_ref_index_at(refinfo_index); |
| 0 | 545 if (must_be_resolved) { |
| 546 // Make sure klass is resolved in constantpool. | |
| 547 if (constants()->tag_at(klass_index).is_unresolved_klass()) return false; | |
| 548 } | |
| 549 return is_klass_loaded_by_klass_index(klass_index); | |
| 550 } | |
| 551 | |
| 552 | |
| 553 void methodOopDesc::set_native_function(address function, bool post_event_flag) { | |
| 554 assert(function != NULL, "use clear_native_function to unregister natives"); | |
| 555 address* native_function = native_function_addr(); | |
| 556 | |
| 557 // We can see racers trying to place the same native function into place. Once | |
| 558 // is plenty. | |
| 559 address current = *native_function; | |
| 560 if (current == function) return; | |
| 561 if (post_event_flag && JvmtiExport::should_post_native_method_bind() && | |
| 562 function != NULL) { | |
| 563 // native_method_throw_unsatisfied_link_error_entry() should only | |
| 564 // be passed when post_event_flag is false. | |
| 565 assert(function != | |
| 566 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 567 "post_event_flag mis-match"); | |
| 568 | |
| 569 // post the bind event, and possible change the bind function | |
| 570 JvmtiExport::post_native_method_bind(this, &function); | |
| 571 } | |
| 572 *native_function = function; | |
| 573 // This function can be called more than once. We must make sure that we always | |
| 574 // use the latest registered method -> check if a stub already has been generated. | |
| 575 // If so, we have to make it not_entrant. | |
| 576 nmethod* nm = code(); // Put it into local variable to guard against concurrent updates | |
| 577 if (nm != NULL) { | |
| 578 nm->make_not_entrant(); | |
| 579 } | |
| 580 } | |
| 581 | |
| 582 | |
| 583 bool methodOopDesc::has_native_function() const { | |
| 584 address func = native_function(); | |
| 585 return (func != NULL && func != SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); | |
| 586 } | |
| 587 | |
| 588 | |
| 589 void methodOopDesc::clear_native_function() { | |
| 590 set_native_function( | |
| 591 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 592 !native_bind_event_is_interesting); | |
| 593 clear_code(); | |
| 594 } | |
| 595 | |
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596 address methodOopDesc::critical_native_function() { |
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597 methodHandle mh(this); |
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598 return NativeLookup::lookup_critical_entry(mh); |
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599 } |
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600 |
| 0 | 601 |
| 602 void methodOopDesc::set_signature_handler(address handler) { | |
| 603 address* signature_handler = signature_handler_addr(); | |
| 604 *signature_handler = handler; | |
| 605 } | |
| 606 | |
| 607 | |
| 608 bool methodOopDesc::is_not_compilable(int comp_level) const { | |
| 710 | 609 if (is_method_handle_invoke()) { |
| 610 // compilers must recognize this method specially, or not at all | |
| 611 return true; | |
| 612 } | |
| 1783 | 613 if (number_of_breakpoints() > 0) { |
| 614 return true; | |
| 615 } | |
| 616 if (comp_level == CompLevel_any) { | |
| 617 return is_not_c1_compilable() || is_not_c2_compilable(); | |
| 0 | 618 } |
| 1783 | 619 if (is_c1_compile(comp_level)) { |
| 620 return is_not_c1_compilable(); | |
| 621 } | |
| 622 if (is_c2_compile(comp_level)) { | |
| 623 return is_not_c2_compilable(); | |
| 624 } | |
| 625 return false; | |
| 0 | 626 } |
| 627 | |
| 628 // call this when compiler finds that this method is not compilable | |
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629 void methodOopDesc::set_not_compilable(int comp_level, bool report) { |
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630 if (PrintCompilation && report) { |
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631 ttyLocker ttyl; |
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632 tty->print("made not compilable "); |
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633 this->print_short_name(tty); |
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634 int size = this->code_size(); |
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635 if (size > 0) |
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636 tty->print(" (%d bytes)", size); |
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637 tty->cr(); |
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638 } |
| 0 | 639 if ((TraceDeoptimization || LogCompilation) && (xtty != NULL)) { |
| 640 ttyLocker ttyl; | |
| 641 xtty->begin_elem("make_not_compilable thread='%d'", (int) os::current_thread_id()); | |
| 642 xtty->method(methodOop(this)); | |
| 643 xtty->stamp(); | |
| 644 xtty->end_elem(); | |
| 645 } | |
| 1783 | 646 if (comp_level == CompLevel_all) { |
| 647 set_not_c1_compilable(); | |
| 648 set_not_c2_compilable(); | |
| 649 } else { | |
| 650 if (is_c1_compile(comp_level)) { | |
| 651 set_not_c1_compilable(); | |
| 652 } else | |
| 653 if (is_c2_compile(comp_level)) { | |
| 654 set_not_c2_compilable(); | |
| 655 } | |
| 0 | 656 } |
| 1783 | 657 CompilationPolicy::policy()->disable_compilation(this); |
| 0 | 658 } |
| 659 | |
| 660 // Revert to using the interpreter and clear out the nmethod | |
| 661 void methodOopDesc::clear_code() { | |
| 662 | |
| 663 // this may be NULL if c2i adapters have not been made yet | |
| 664 // Only should happen at allocate time. | |
| 665 if (_adapter == NULL) { | |
| 666 _from_compiled_entry = NULL; | |
| 667 } else { | |
| 668 _from_compiled_entry = _adapter->get_c2i_entry(); | |
| 669 } | |
| 670 OrderAccess::storestore(); | |
| 671 _from_interpreted_entry = _i2i_entry; | |
| 672 OrderAccess::storestore(); | |
| 673 _code = NULL; | |
| 674 } | |
| 675 | |
| 676 // Called by class data sharing to remove any entry points (which are not shared) | |
| 677 void methodOopDesc::unlink_method() { | |
| 678 _code = NULL; | |
| 679 _i2i_entry = NULL; | |
| 680 _from_interpreted_entry = NULL; | |
| 681 if (is_native()) { | |
| 682 *native_function_addr() = NULL; | |
| 683 set_signature_handler(NULL); | |
| 684 } | |
| 685 NOT_PRODUCT(set_compiled_invocation_count(0);) | |
| 686 invocation_counter()->reset(); | |
| 687 backedge_counter()->reset(); | |
| 688 _adapter = NULL; | |
| 689 _from_compiled_entry = NULL; | |
| 690 assert(_method_data == NULL, "unexpected method data?"); | |
| 691 set_method_data(NULL); | |
| 692 set_interpreter_throwout_count(0); | |
| 693 set_interpreter_invocation_count(0); | |
| 694 } | |
| 695 | |
| 696 // Called when the method_holder is getting linked. Setup entrypoints so the method | |
| 697 // is ready to be called from interpreter, compiler, and vtables. | |
| 698 void methodOopDesc::link_method(methodHandle h_method, TRAPS) { | |
| 3748 | 699 // If the code cache is full, we may reenter this function for the |
| 700 // leftover methods that weren't linked. | |
| 701 if (_i2i_entry != NULL) return; | |
| 702 | |
| 0 | 703 assert(_adapter == NULL, "init'd to NULL" ); |
| 704 assert( _code == NULL, "nothing compiled yet" ); | |
| 705 | |
| 706 // Setup interpreter entrypoint | |
| 707 assert(this == h_method(), "wrong h_method()" ); | |
| 708 address entry = Interpreter::entry_for_method(h_method); | |
| 709 assert(entry != NULL, "interpreter entry must be non-null"); | |
| 710 // Sets both _i2i_entry and _from_interpreted_entry | |
| 711 set_interpreter_entry(entry); | |
| 710 | 712 if (is_native() && !is_method_handle_invoke()) { |
| 0 | 713 set_native_function( |
| 714 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 715 !native_bind_event_is_interesting); | |
| 716 } | |
| 717 | |
| 718 // Setup compiler entrypoint. This is made eagerly, so we do not need | |
| 719 // special handling of vtables. An alternative is to make adapters more | |
| 720 // lazily by calling make_adapter() from from_compiled_entry() for the | |
| 721 // normal calls. For vtable calls life gets more complicated. When a | |
| 722 // call-site goes mega-morphic we need adapters in all methods which can be | |
| 723 // called from the vtable. We need adapters on such methods that get loaded | |
| 724 // later. Ditto for mega-morphic itable calls. If this proves to be a | |
| 725 // problem we'll make these lazily later. | |
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726 (void) make_adapters(h_method, CHECK); |
| 0 | 727 |
| 728 // ONLY USE the h_method now as make_adapter may have blocked | |
| 729 | |
| 730 } | |
| 731 | |
| 732 address methodOopDesc::make_adapters(methodHandle mh, TRAPS) { | |
| 733 // Adapters for compiled code are made eagerly here. They are fairly | |
| 734 // small (generally < 100 bytes) and quick to make (and cached and shared) | |
| 735 // so making them eagerly shouldn't be too expensive. | |
| 736 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh); | |
| 737 if (adapter == NULL ) { | |
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738 THROW_MSG_NULL(vmSymbols::java_lang_VirtualMachineError(), "out of space in CodeCache for adapters"); |
| 0 | 739 } |
| 740 | |
| 741 mh->set_adapter_entry(adapter); | |
| 742 mh->_from_compiled_entry = adapter->get_c2i_entry(); | |
| 743 return adapter->get_c2i_entry(); | |
| 744 } | |
| 745 | |
| 746 // The verified_code_entry() must be called when a invoke is resolved | |
| 747 // on this method. | |
| 748 | |
| 749 // It returns the compiled code entry point, after asserting not null. | |
| 750 // This function is called after potential safepoints so that nmethod | |
| 751 // or adapter that it points to is still live and valid. | |
| 752 // This function must not hit a safepoint! | |
| 753 address methodOopDesc::verified_code_entry() { | |
| 754 debug_only(No_Safepoint_Verifier nsv;) | |
| 1202 | 755 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); |
| 756 if (code == NULL && UseCodeCacheFlushing) { | |
| 757 nmethod *saved_code = CodeCache::find_and_remove_saved_code(this); | |
| 758 if (saved_code != NULL) { | |
| 759 methodHandle method(this); | |
| 760 assert( ! saved_code->is_osr_method(), "should not get here for osr" ); | |
| 761 set_code( method, saved_code ); | |
| 762 } | |
| 763 } | |
| 764 | |
| 0 | 765 assert(_from_compiled_entry != NULL, "must be set"); |
| 766 return _from_compiled_entry; | |
| 767 } | |
| 768 | |
| 769 // Check that if an nmethod ref exists, it has a backlink to this or no backlink at all | |
| 770 // (could be racing a deopt). | |
| 771 // Not inline to avoid circular ref. | |
| 772 bool methodOopDesc::check_code() const { | |
| 773 // cached in a register or local. There's a race on the value of the field. | |
| 774 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); | |
| 775 return code == NULL || (code->method() == NULL) || (code->method() == (methodOop)this && !code->is_osr_method()); | |
| 776 } | |
| 777 | |
| 778 // Install compiled code. Instantly it can execute. | |
| 779 void methodOopDesc::set_code(methodHandle mh, nmethod *code) { | |
| 780 assert( code, "use clear_code to remove code" ); | |
| 781 assert( mh->check_code(), "" ); | |
| 782 | |
| 783 guarantee(mh->adapter() != NULL, "Adapter blob must already exist!"); | |
| 784 | |
| 785 // These writes must happen in this order, because the interpreter will | |
| 786 // directly jump to from_interpreted_entry which jumps to an i2c adapter | |
| 787 // which jumps to _from_compiled_entry. | |
| 788 mh->_code = code; // Assign before allowing compiled code to exec | |
| 789 | |
| 790 int comp_level = code->comp_level(); | |
| 791 // In theory there could be a race here. In practice it is unlikely | |
| 792 // and not worth worrying about. | |
| 1783 | 793 if (comp_level > mh->highest_comp_level()) { |
| 794 mh->set_highest_comp_level(comp_level); | |
| 0 | 795 } |
| 796 | |
| 797 OrderAccess::storestore(); | |
| 1692 | 798 #ifdef SHARK |
|
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799 mh->_from_interpreted_entry = code->insts_begin(); |
| 1692 | 800 #else |
| 0 | 801 mh->_from_compiled_entry = code->verified_entry_point(); |
| 802 OrderAccess::storestore(); | |
| 803 // Instantly compiled code can execute. | |
| 804 mh->_from_interpreted_entry = mh->get_i2c_entry(); | |
| 1692 | 805 #endif // SHARK |
| 0 | 806 |
| 807 } | |
| 808 | |
| 809 | |
| 810 bool methodOopDesc::is_overridden_in(klassOop k) const { | |
| 811 instanceKlass* ik = instanceKlass::cast(k); | |
| 812 | |
| 813 if (ik->is_interface()) return false; | |
| 814 | |
| 815 // If method is an interface, we skip it - except if it | |
| 816 // is a miranda method | |
| 817 if (instanceKlass::cast(method_holder())->is_interface()) { | |
| 818 // Check that method is not a miranda method | |
| 819 if (ik->lookup_method(name(), signature()) == NULL) { | |
| 820 // No implementation exist - so miranda method | |
| 821 return false; | |
| 822 } | |
| 823 return true; | |
| 824 } | |
| 825 | |
| 826 assert(ik->is_subclass_of(method_holder()), "should be subklass"); | |
| 827 assert(ik->vtable() != NULL, "vtable should exist"); | |
| 828 if (vtable_index() == nonvirtual_vtable_index) { | |
| 829 return false; | |
| 830 } else { | |
| 831 methodOop vt_m = ik->method_at_vtable(vtable_index()); | |
| 832 return vt_m != methodOop(this); | |
| 833 } | |
| 834 } | |
| 835 | |
| 836 | |
|
48
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|
837 // give advice about whether this methodOop should be cached or not |
|
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838 bool methodOopDesc::should_not_be_cached() const { |
|
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839 if (is_old()) { |
|
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|
840 // This method has been redefined. It is either EMCP or obsolete |
|
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841 // and we don't want to cache it because that would pin the method |
|
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842 // down and prevent it from being collectible if and when it |
|
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843 // finishes executing. |
|
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844 return true; |
|
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845 } |
|
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846 |
|
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847 if (mark()->should_not_be_cached()) { |
|
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848 // It is either not safe or not a good idea to cache this |
|
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849 // method at this time because of the state of the embedded |
|
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850 // markOop. See markOop.cpp for the gory details. |
|
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851 return true; |
|
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852 } |
|
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|
853 |
|
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854 // caching this method should be just fine |
|
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855 return false; |
|
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|
856 } |
|
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|
857 |
|
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858 bool methodOopDesc::is_method_handle_invoke_name(vmSymbols::SID name_sid) { |
|
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859 switch (name_sid) { |
|
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|
860 case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeExact_name): |
| 2460 | 861 case vmSymbols::VM_SYMBOL_ENUM_NAME(invoke_name): |
|
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862 return true; |
|
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|
863 } |
| 2460 | 864 if (AllowInvokeGeneric |
| 865 && name_sid == vmSymbols::VM_SYMBOL_ENUM_NAME(invokeGeneric_name)) | |
|
1793
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|
866 return true; |
|
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|
867 return false; |
|
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|
868 } |
|
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|
869 |
| 710 | 870 // Constant pool structure for invoke methods: |
| 871 enum { | |
|
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872 _imcp_invoke_name = 1, // utf8: 'invokeExact' or 'invokeGeneric' |
|
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873 _imcp_invoke_signature, // utf8: (variable Symbol*) |
|
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|
874 _imcp_method_type_value, // string: (variable java/lang/invoke/MethodType, sic) |
| 710 | 875 _imcp_limit |
| 876 }; | |
| 877 | |
| 878 oop methodOopDesc::method_handle_type() const { | |
| 879 if (!is_method_handle_invoke()) { assert(false, "caller resp."); return NULL; } | |
| 880 oop mt = constants()->resolved_string_at(_imcp_method_type_value); | |
| 881 assert(mt->klass() == SystemDictionary::MethodType_klass(), ""); | |
| 882 return mt; | |
| 883 } | |
| 884 | |
| 885 jint* methodOopDesc::method_type_offsets_chain() { | |
|
6123
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886 static jint pchase[] = { -1, -1, -1, -1 }; |
| 710 | 887 if (pchase[0] == -1) { |
|
6123
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888 jint step0 = in_bytes(const_offset()); |
|
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889 jint step1 = in_bytes(constMethodOopDesc::constants_offset()); |
|
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890 jint step2 = (constantPoolOopDesc::header_size() + _imcp_method_type_value) * HeapWordSize; |
| 710 | 891 // do this in reverse to avoid races: |
|
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892 OrderAccess::release_store(&pchase[2], step2); |
| 710 | 893 OrderAccess::release_store(&pchase[1], step1); |
| 894 OrderAccess::release_store(&pchase[0], step0); | |
| 895 } | |
| 896 return pchase; | |
| 897 } | |
| 898 | |
|
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899 //------------------------------------------------------------------------------ |
|
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900 // methodOopDesc::is_method_handle_adapter |
|
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901 // |
|
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902 // Tests if this method is an internal adapter frame from the |
|
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903 // MethodHandleCompiler. |
|
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904 // Must be consistent with MethodHandleCompiler::get_method_oop(). |
|
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905 bool methodOopDesc::is_method_handle_adapter() const { |
|
1662
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906 if (is_synthetic() && |
|
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907 !is_native() && // has code from MethodHandleCompiler |
|
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908 is_method_handle_invoke_name(name()) && |
|
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909 MethodHandleCompiler::klass_is_method_handle_adapter_holder(method_holder())) { |
|
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910 assert(!is_method_handle_invoke(), "disjoint"); |
|
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911 return true; |
|
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|
912 } else { |
|
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|
913 return false; |
|
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|
914 } |
|
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|
915 } |
|
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|
916 |
| 710 | 917 methodHandle methodOopDesc::make_invoke_method(KlassHandle holder, |
|
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918 Symbol* name, |
|
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|
919 Symbol* signature, |
| 710 | 920 Handle method_type, TRAPS) { |
|
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|
921 ResourceMark rm; |
| 710 | 922 methodHandle empty; |
| 923 | |
| 924 assert(holder() == SystemDictionary::MethodHandle_klass(), | |
| 925 "must be a JSR 292 magic type"); | |
| 926 | |
| 927 if (TraceMethodHandles) { | |
| 928 tty->print("Creating invoke method for "); | |
| 929 signature->print_value(); | |
| 930 tty->cr(); | |
| 931 } | |
| 932 | |
|
2478
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|
933 // invariant: cp->symbol_at_put is preceded by a refcount increment (more usually a lookup) |
|
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|
934 name->increment_refcount(); |
|
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|
935 signature->increment_refcount(); |
|
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|
936 |
|
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|
937 // record non-BCP method types in the constant pool |
|
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|
938 GrowableArray<KlassHandle>* extra_klasses = NULL; |
|
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|
939 for (int i = -1, len = java_lang_invoke_MethodType::ptype_count(method_type()); i < len; i++) { |
|
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|
940 oop ptype = (i == -1 |
|
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|
941 ? java_lang_invoke_MethodType::rtype(method_type()) |
|
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942 : java_lang_invoke_MethodType::ptype(method_type(), i)); |
|
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|
943 klassOop klass = check_non_bcp_klass(java_lang_Class::as_klassOop(ptype)); |
|
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|
944 if (klass != NULL) { |
|
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|
945 if (extra_klasses == NULL) |
|
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|
946 extra_klasses = new GrowableArray<KlassHandle>(len+1); |
|
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|
947 bool dup = false; |
|
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|
948 for (int j = 0; j < extra_klasses->length(); j++) { |
|
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|
949 if (extra_klasses->at(j) == klass) { dup = true; break; } |
|
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|
950 } |
|
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|
951 if (!dup) |
|
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|
952 extra_klasses->append(KlassHandle(THREAD, klass)); |
|
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|
953 } |
|
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|
954 } |
|
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|
955 |
|
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|
956 int extra_klass_count = (extra_klasses == NULL ? 0 : extra_klasses->length()); |
|
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|
957 int cp_length = _imcp_limit + extra_klass_count; |
| 710 | 958 constantPoolHandle cp; |
| 959 { | |
|
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|
960 constantPoolOop cp_oop = oopFactory::new_constantPool(cp_length, IsSafeConc, CHECK_(empty)); |
| 710 | 961 cp = constantPoolHandle(THREAD, cp_oop); |
| 962 } | |
|
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963 cp->symbol_at_put(_imcp_invoke_name, name); |
|
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964 cp->symbol_at_put(_imcp_invoke_signature, signature); |
|
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|
965 cp->string_at_put(_imcp_method_type_value, Universe::the_null_string()); |
|
3785
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|
966 for (int j = 0; j < extra_klass_count; j++) { |
|
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|
967 KlassHandle klass = extra_klasses->at(j); |
|
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|
968 cp->klass_at_put(_imcp_limit + j, klass()); |
|
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|
969 } |
|
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|
970 cp->set_preresolution(); |
| 710 | 971 cp->set_pool_holder(holder()); |
| 972 | |
| 973 // set up the fancy stuff: | |
| 974 cp->pseudo_string_at_put(_imcp_method_type_value, method_type()); | |
| 975 methodHandle m; | |
| 976 { | |
| 977 int flags_bits = (JVM_MH_INVOKE_BITS | JVM_ACC_PUBLIC | JVM_ACC_FINAL); | |
| 978 methodOop m_oop = oopFactory::new_method(0, accessFlags_from(flags_bits), | |
|
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979 0, 0, 0, 0, IsSafeConc, CHECK_(empty)); |
| 710 | 980 m = methodHandle(THREAD, m_oop); |
| 981 } | |
| 982 m->set_constants(cp()); | |
| 983 m->set_name_index(_imcp_invoke_name); | |
| 984 m->set_signature_index(_imcp_invoke_signature); | |
|
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985 assert(is_method_handle_invoke_name(m->name()), ""); |
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986 assert(m->signature() == signature, ""); |
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987 assert(m->is_method_handle_invoke(), ""); |
| 710 | 988 #ifdef CC_INTERP |
|
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989 ResultTypeFinder rtf(signature); |
| 710 | 990 m->set_result_index(rtf.type()); |
| 991 #endif | |
| 992 m->compute_size_of_parameters(THREAD); | |
|
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993 m->init_intrinsic_id(); |
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994 assert(m->intrinsic_id() == vmIntrinsics::_invokeExact || |
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995 m->intrinsic_id() == vmIntrinsics::_invokeGeneric, "must be an invoker"); |
| 710 | 996 |
| 997 // Finally, set up its entry points. | |
| 998 assert(m->method_handle_type() == method_type(), ""); | |
| 999 assert(m->can_be_statically_bound(), ""); | |
| 1000 m->set_vtable_index(methodOopDesc::nonvirtual_vtable_index); | |
| 1001 m->link_method(m, CHECK_(empty)); | |
| 1002 | |
| 1003 #ifdef ASSERT | |
| 1004 // Make sure the pointer chase works. | |
| 1005 address p = (address) m(); | |
| 1006 for (jint* pchase = method_type_offsets_chain(); (*pchase) != -1; pchase++) { | |
| 1007 p = *(address*)(p + (*pchase)); | |
| 1008 } | |
| 1009 assert((oop)p == method_type(), "pointer chase is correct"); | |
| 1010 #endif | |
| 1011 | |
|
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1012 if (TraceMethodHandles && (Verbose || WizardMode)) |
| 710 | 1013 m->print_on(tty); |
| 1014 | |
| 1015 return m; | |
| 1016 } | |
| 1017 | |
|
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1018 klassOop methodOopDesc::check_non_bcp_klass(klassOop klass) { |
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1019 if (klass != NULL && Klass::cast(klass)->class_loader() != NULL) { |
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1020 if (Klass::cast(klass)->oop_is_objArray()) |
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1021 klass = objArrayKlass::cast(klass)->bottom_klass(); |
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1022 return klass; |
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1023 } |
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1024 return NULL; |
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1025 } |
| 710 | 1026 |
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1027 |
| 0 | 1028 methodHandle methodOopDesc:: clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, |
| 1029 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS) { | |
| 1030 // Code below does not work for native methods - they should never get rewritten anyway | |
| 1031 assert(!m->is_native(), "cannot rewrite native methods"); | |
| 1032 // Allocate new methodOop | |
| 1033 AccessFlags flags = m->access_flags(); | |
| 1034 int checked_exceptions_len = m->checked_exceptions_length(); | |
| 1035 int localvariable_len = m->localvariable_table_length(); | |
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1036 int exception_table_len = m->exception_table_length(); |
|
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1037 // Allocate newm_oop with the is_conc_safe parameter set |
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1038 // to IsUnsafeConc to indicate that newm_oop is not yet |
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1039 // safe for concurrent processing by a GC. |
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1040 methodOop newm_oop = oopFactory::new_method(new_code_length, |
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1041 flags, |
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1042 new_compressed_linenumber_size, |
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1043 localvariable_len, |
|
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1044 exception_table_len, |
|
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1045 checked_exceptions_len, |
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1046 IsUnsafeConc, |
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1047 CHECK_(methodHandle())); |
| 0 | 1048 methodHandle newm (THREAD, newm_oop); |
|
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1049 NOT_PRODUCT(int nmsz = newm->is_parsable() ? newm->size() : -1;) |
| 0 | 1050 int new_method_size = newm->method_size(); |
| 1051 // Create a shallow copy of methodOopDesc part, but be careful to preserve the new constMethodOop | |
| 1052 constMethodOop newcm = newm->constMethod(); | |
|
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1053 NOT_PRODUCT(int ncmsz = newcm->is_parsable() ? newcm->size() : -1;) |
| 0 | 1054 int new_const_method_size = newm->constMethod()->object_size(); |
|
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1055 |
| 0 | 1056 memcpy(newm(), m(), sizeof(methodOopDesc)); |
| 1057 // Create shallow copy of constMethodOopDesc, but be careful to preserve the methodOop | |
|
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1058 // is_conc_safe is set to false because that is the value of |
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1059 // is_conc_safe initialzied into newcm and the copy should |
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1060 // not overwrite that value. During the window during which it is |
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1061 // tagged as unsafe, some extra work could be needed during precleaning |
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1062 // or concurrent marking but those phases will be correct. Setting and |
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1063 // resetting is done in preference to a careful copying into newcm to |
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1064 // avoid having to know the precise layout of a constMethodOop. |
|
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1065 m->constMethod()->set_is_conc_safe(oopDesc::IsUnsafeConc); |
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1066 assert(m->constMethod()->is_parsable(), "Should remain parsable"); |
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1067 |
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1068 // NOTE: this is a reachable object that transiently signals "conc_unsafe" |
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1069 // However, no allocations are done during this window |
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1070 // during which it is tagged conc_unsafe, so we are assured that any concurrent |
|
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1071 // thread will not wait forever for the object to revert to "conc_safe". |
|
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1072 // Further, any such conc_unsafe object will indicate a stable size |
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1073 // through the transition. |
| 0 | 1074 memcpy(newcm, m->constMethod(), sizeof(constMethodOopDesc)); |
|
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1075 m->constMethod()->set_is_conc_safe(oopDesc::IsSafeConc); |
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1076 assert(m->constMethod()->is_parsable(), "Should remain parsable"); |
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1077 |
| 0 | 1078 // Reset correct method/const method, method size, and parameter info |
| 1079 newm->set_constMethod(newcm); | |
| 1080 newm->constMethod()->set_code_size(new_code_length); | |
| 1081 newm->constMethod()->set_constMethod_size(new_const_method_size); | |
| 1082 newm->set_method_size(new_method_size); | |
| 1083 assert(newm->code_size() == new_code_length, "check"); | |
| 1084 assert(newm->checked_exceptions_length() == checked_exceptions_len, "check"); | |
| 1085 assert(newm->localvariable_table_length() == localvariable_len, "check"); | |
| 1086 // Copy new byte codes | |
| 1087 memcpy(newm->code_base(), new_code, new_code_length); | |
| 1088 // Copy line number table | |
| 1089 if (new_compressed_linenumber_size > 0) { | |
| 1090 memcpy(newm->compressed_linenumber_table(), | |
| 1091 new_compressed_linenumber_table, | |
| 1092 new_compressed_linenumber_size); | |
| 1093 } | |
| 1094 // Copy checked_exceptions | |
| 1095 if (checked_exceptions_len > 0) { | |
| 1096 memcpy(newm->checked_exceptions_start(), | |
| 1097 m->checked_exceptions_start(), | |
| 1098 checked_exceptions_len * sizeof(CheckedExceptionElement)); | |
| 1099 } | |
| 1100 // Copy local variable number table | |
| 1101 if (localvariable_len > 0) { | |
| 1102 memcpy(newm->localvariable_table_start(), | |
| 1103 m->localvariable_table_start(), | |
| 1104 localvariable_len * sizeof(LocalVariableTableElement)); | |
| 1105 } | |
|
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1106 |
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1107 // Only set is_conc_safe to true when changes to newcm are |
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1108 // complete. |
|
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1109 assert(!newm->is_parsable() || nmsz < 0 || newm->size() == nmsz, "newm->size() inconsistency"); |
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1110 assert(!newcm->is_parsable() || ncmsz < 0 || newcm->size() == ncmsz, "newcm->size() inconsistency"); |
|
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1111 newcm->set_is_conc_safe(true); |
| 0 | 1112 return newm; |
| 1113 } | |
| 1114 | |
|
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1115 vmSymbols::SID methodOopDesc::klass_id_for_intrinsics(klassOop holder) { |
| 0 | 1116 // if loader is not the default loader (i.e., != NULL), we can't know the intrinsics |
| 1117 // because we are not loading from core libraries | |
|
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1118 if (instanceKlass::cast(holder)->class_loader() != NULL) |
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1119 return vmSymbols::NO_SID; // regardless of name, no intrinsics here |
| 0 | 1120 |
| 1121 // see if the klass name is well-known: | |
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1122 Symbol* klass_name = instanceKlass::cast(holder)->name(); |
|
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1123 return vmSymbols::find_sid(klass_name); |
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1124 } |
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1125 |
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1126 void methodOopDesc::init_intrinsic_id() { |
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1127 assert(_intrinsic_id == vmIntrinsics::_none, "do this just once"); |
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1128 const uintptr_t max_id_uint = right_n_bits((int)(sizeof(_intrinsic_id) * BitsPerByte)); |
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1129 assert((uintptr_t)vmIntrinsics::ID_LIMIT <= max_id_uint, "else fix size"); |
|
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1130 assert(intrinsic_id_size_in_bytes() == sizeof(_intrinsic_id), ""); |
|
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1131 |
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1132 // the klass name is well-known: |
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1133 vmSymbols::SID klass_id = klass_id_for_intrinsics(method_holder()); |
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1134 assert(klass_id != vmSymbols::NO_SID, "caller responsibility"); |
| 0 | 1135 |
| 1136 // ditto for method and signature: | |
| 1137 vmSymbols::SID name_id = vmSymbols::find_sid(name()); | |
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1138 if (name_id == vmSymbols::NO_SID) return; |
| 0 | 1139 vmSymbols::SID sig_id = vmSymbols::find_sid(signature()); |
|
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1140 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
|
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1141 && sig_id == vmSymbols::NO_SID) return; |
| 0 | 1142 jshort flags = access_flags().as_short(); |
| 1143 | |
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1144 vmIntrinsics::ID id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
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1145 if (id != vmIntrinsics::_none) { |
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1146 set_intrinsic_id(id); |
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1147 return; |
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1148 } |
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1149 |
| 0 | 1150 // A few slightly irregular cases: |
| 1151 switch (klass_id) { | |
| 1152 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_StrictMath): | |
| 1153 // Second chance: check in regular Math. | |
| 1154 switch (name_id) { | |
| 1155 case vmSymbols::VM_SYMBOL_ENUM_NAME(min_name): | |
| 1156 case vmSymbols::VM_SYMBOL_ENUM_NAME(max_name): | |
| 1157 case vmSymbols::VM_SYMBOL_ENUM_NAME(sqrt_name): | |
| 1158 // pretend it is the corresponding method in the non-strict class: | |
| 1159 klass_id = vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_Math); | |
|
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1160 id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
| 0 | 1161 break; |
| 1162 } | |
|
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1163 break; |
|
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1164 |
|
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1165 // Signature-polymorphic methods: MethodHandle.invoke*, InvokeDynamic.*. |
|
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1166 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle): |
|
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1167 if (is_static() || !is_native()) break; |
|
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1168 switch (name_id) { |
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1169 case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeGeneric_name): |
| 2460 | 1170 if (!AllowInvokeGeneric) break; |
| 1171 case vmSymbols::VM_SYMBOL_ENUM_NAME(invoke_name): | |
|
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1172 id = vmIntrinsics::_invokeGeneric; |
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1173 break; |
|
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1174 case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeExact_name): |
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1175 id = vmIntrinsics::_invokeExact; |
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1176 break; |
|
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1177 } |
|
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1178 break; |
|
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1179 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InvokeDynamic): |
|
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1180 if (!is_static() || !is_native()) break; |
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1181 id = vmIntrinsics::_invokeDynamic; |
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1182 break; |
| 0 | 1183 } |
| 1184 | |
|
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1185 if (id != vmIntrinsics::_none) { |
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1186 // Set up its iid. It is an alias method. |
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1187 set_intrinsic_id(id); |
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1188 return; |
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1189 } |
| 0 | 1190 } |
| 1191 | |
| 1192 // These two methods are static since a GC may move the methodOopDesc | |
| 1193 bool methodOopDesc::load_signature_classes(methodHandle m, TRAPS) { | |
| 1194 bool sig_is_loaded = true; | |
| 1195 Handle class_loader(THREAD, instanceKlass::cast(m->method_holder())->class_loader()); | |
| 1196 Handle protection_domain(THREAD, Klass::cast(m->method_holder())->protection_domain()); | |
|
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1197 ResourceMark rm(THREAD); |
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1198 Symbol* signature = m->signature(); |
| 0 | 1199 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
| 1200 if (ss.is_object()) { | |
|
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1201 Symbol* sym = ss.as_symbol(CHECK_(false)); |
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1202 Symbol* name = sym; |
| 0 | 1203 klassOop klass = SystemDictionary::resolve_or_null(name, class_loader, |
| 1204 protection_domain, THREAD); | |
|
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1205 // We are loading classes eagerly. If a ClassNotFoundException or |
|
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1206 // a LinkageError was generated, be sure to ignore it. |
| 0 | 1207 if (HAS_PENDING_EXCEPTION) { |
| 1142 | 1208 if (PENDING_EXCEPTION->is_a(SystemDictionary::ClassNotFoundException_klass()) || |
| 1209 PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { | |
| 0 | 1210 CLEAR_PENDING_EXCEPTION; |
| 1211 } else { | |
| 1212 return false; | |
| 1213 } | |
| 1214 } | |
| 1215 if( klass == NULL) { sig_is_loaded = false; } | |
| 1216 } | |
| 1217 } | |
| 1218 return sig_is_loaded; | |
| 1219 } | |
| 1220 | |
| 1221 bool methodOopDesc::has_unloaded_classes_in_signature(methodHandle m, TRAPS) { | |
| 1222 Handle class_loader(THREAD, instanceKlass::cast(m->method_holder())->class_loader()); | |
| 1223 Handle protection_domain(THREAD, Klass::cast(m->method_holder())->protection_domain()); | |
|
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1224 ResourceMark rm(THREAD); |
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1225 Symbol* signature = m->signature(); |
| 0 | 1226 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
| 1227 if (ss.type() == T_OBJECT) { | |
|
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1228 Symbol* name = ss.as_symbol_or_null(); |
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1229 if (name == NULL) return true; |
| 0 | 1230 klassOop klass = SystemDictionary::find(name, class_loader, protection_domain, THREAD); |
| 1231 if (klass == NULL) return true; | |
| 1232 } | |
| 1233 } | |
| 1234 return false; | |
| 1235 } | |
| 1236 | |
| 1237 // Exposed so field engineers can debug VM | |
| 1238 void methodOopDesc::print_short_name(outputStream* st) { | |
| 1239 ResourceMark rm; | |
| 1240 #ifdef PRODUCT | |
| 1241 st->print(" %s::", method_holder()->klass_part()->external_name()); | |
| 1242 #else | |
| 1243 st->print(" %s::", method_holder()->klass_part()->internal_name()); | |
| 1244 #endif | |
| 1245 name()->print_symbol_on(st); | |
| 1246 if (WizardMode) signature()->print_symbol_on(st); | |
| 1247 } | |
| 1248 | |
| 1249 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
| 1250 static void reorder_based_on_method_index(objArrayOop methods, | |
| 1251 objArrayOop annotations, | |
|
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1252 GrowableArray<oop>* temp_array) { |
| 0 | 1253 if (annotations == NULL) { |
| 1254 return; | |
| 1255 } | |
| 1256 | |
| 1257 int length = methods->length(); | |
| 1258 int i; | |
| 1259 // Copy to temp array | |
|
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1260 temp_array->clear(); |
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1261 for (i = 0; i < length; i++) { |
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1262 temp_array->append(annotations->obj_at(i)); |
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1263 } |
| 0 | 1264 |
| 1265 // Copy back using old method indices | |
| 1266 for (i = 0; i < length; i++) { | |
| 1267 methodOop m = (methodOop) methods->obj_at(i); | |
|
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1268 annotations->obj_at_put(i, temp_array->at(m->method_idnum())); |
| 0 | 1269 } |
| 1270 } | |
| 1271 | |
| 3779 | 1272 // Comparer for sorting an object array containing |
| 1273 // methodOops. | |
|
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1274 // Used non-template method_comparator methods since |
|
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1275 // Visual Studio 2003 compiler generates incorrect |
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1276 // optimized code for it. |
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1277 static int method_comparator_narrowOop(narrowOop a, narrowOop b) { |
| 3779 | 1278 methodOop m = (methodOop)oopDesc::decode_heap_oop_not_null(a); |
| 1279 methodOop n = (methodOop)oopDesc::decode_heap_oop_not_null(b); | |
| 1280 return m->name()->fast_compare(n->name()); | |
| 1281 } | |
|
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1282 static int method_comparator_oop(oop a, oop b) { |
|
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1283 methodOop m = (methodOop)a; |
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1284 methodOop n = (methodOop)b; |
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1285 return m->name()->fast_compare(n->name()); |
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1286 } |
| 0 | 1287 |
| 1288 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
| 1289 void methodOopDesc::sort_methods(objArrayOop methods, | |
| 1290 objArrayOop methods_annotations, | |
| 1291 objArrayOop methods_parameter_annotations, | |
| 1292 objArrayOop methods_default_annotations, | |
| 1293 bool idempotent) { | |
| 1294 int length = methods->length(); | |
| 1295 if (length > 1) { | |
| 1296 bool do_annotations = false; | |
| 1297 if (methods_annotations != NULL || | |
| 1298 methods_parameter_annotations != NULL || | |
| 1299 methods_default_annotations != NULL) { | |
| 1300 do_annotations = true; | |
| 1301 } | |
| 1302 if (do_annotations) { | |
| 1303 // Remember current method ordering so we can reorder annotations | |
| 1304 for (int i = 0; i < length; i++) { | |
| 1305 methodOop m = (methodOop) methods->obj_at(i); | |
| 1306 m->set_method_idnum(i); | |
| 1307 } | |
| 1308 } | |
| 3779 | 1309 { |
| 1310 No_Safepoint_Verifier nsv; | |
| 1311 if (UseCompressedOops) { | |
|
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1312 QuickSort::sort<narrowOop>((narrowOop*)(methods->base()), length, method_comparator_narrowOop, idempotent); |
| 3779 | 1313 } else { |
|
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1314 QuickSort::sort<oop>((oop*)(methods->base()), length, method_comparator_oop, idempotent); |
| 0 | 1315 } |
| 3779 | 1316 if (UseConcMarkSweepGC) { |
| 1317 // For CMS we need to dirty the cards for the array | |
| 1318 BarrierSet* bs = Universe::heap()->barrier_set(); | |
| 1319 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); | |
| 1320 bs->write_ref_array(methods->base(), length); | |
| 1321 } | |
| 0 | 1322 } |
| 1323 | |
| 1324 // Sort annotations if necessary | |
| 1325 assert(methods_annotations == NULL || methods_annotations->length() == methods->length(), ""); | |
| 1326 assert(methods_parameter_annotations == NULL || methods_parameter_annotations->length() == methods->length(), ""); | |
| 1327 assert(methods_default_annotations == NULL || methods_default_annotations->length() == methods->length(), ""); | |
| 1328 if (do_annotations) { | |
|
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1329 ResourceMark rm; |
| 0 | 1330 // Allocate temporary storage |
|
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1331 GrowableArray<oop>* temp_array = new GrowableArray<oop>(length); |
| 0 | 1332 reorder_based_on_method_index(methods, methods_annotations, temp_array); |
| 1333 reorder_based_on_method_index(methods, methods_parameter_annotations, temp_array); | |
| 1334 reorder_based_on_method_index(methods, methods_default_annotations, temp_array); | |
| 1335 } | |
| 1336 | |
| 1337 // Reset method ordering | |
| 1338 for (int i = 0; i < length; i++) { | |
| 1339 methodOop m = (methodOop) methods->obj_at(i); | |
| 1340 m->set_method_idnum(i); | |
| 1341 } | |
| 1342 } | |
| 1343 } | |
| 1344 | |
| 1345 | |
| 1346 //----------------------------------------------------------------------------------- | |
| 1347 // Non-product code | |
| 1348 | |
| 1349 #ifndef PRODUCT | |
| 1350 class SignatureTypePrinter : public SignatureTypeNames { | |
| 1351 private: | |
| 1352 outputStream* _st; | |
| 1353 bool _use_separator; | |
| 1354 | |
| 1355 void type_name(const char* name) { | |
| 1356 if (_use_separator) _st->print(", "); | |
| 1357 _st->print(name); | |
| 1358 _use_separator = true; | |
| 1359 } | |
| 1360 | |
| 1361 public: | |
|
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1362 SignatureTypePrinter(Symbol* signature, outputStream* st) : SignatureTypeNames(signature) { |
| 0 | 1363 _st = st; |
| 1364 _use_separator = false; | |
| 1365 } | |
| 1366 | |
| 1367 void print_parameters() { _use_separator = false; iterate_parameters(); } | |
| 1368 void print_returntype() { _use_separator = false; iterate_returntype(); } | |
| 1369 }; | |
| 1370 | |
| 1371 | |
| 1372 void methodOopDesc::print_name(outputStream* st) { | |
| 1373 Thread *thread = Thread::current(); | |
| 1374 ResourceMark rm(thread); | |
| 1375 SignatureTypePrinter sig(signature(), st); | |
| 1376 st->print("%s ", is_static() ? "static" : "virtual"); | |
| 1377 sig.print_returntype(); | |
| 1378 st->print(" %s.", method_holder()->klass_part()->internal_name()); | |
| 1379 name()->print_symbol_on(st); | |
| 1380 st->print("("); | |
| 1381 sig.print_parameters(); | |
| 1382 st->print(")"); | |
| 1383 } | |
| 1384 | |
| 1385 | |
| 1386 void methodOopDesc::print_codes_on(outputStream* st) const { | |
| 1387 print_codes_on(0, code_size(), st); | |
| 1388 } | |
| 1389 | |
| 1390 void methodOopDesc::print_codes_on(int from, int to, outputStream* st) const { | |
| 1391 Thread *thread = Thread::current(); | |
| 1392 ResourceMark rm(thread); | |
| 1393 methodHandle mh (thread, (methodOop)this); | |
| 1394 BytecodeStream s(mh); | |
| 1395 s.set_interval(from, to); | |
| 1396 BytecodeTracer::set_closure(BytecodeTracer::std_closure()); | |
| 1397 while (s.next() >= 0) BytecodeTracer::trace(mh, s.bcp(), st); | |
| 1398 } | |
| 1399 #endif // not PRODUCT | |
| 1400 | |
| 1401 | |
| 1402 // Simple compression of line number tables. We use a regular compressed stream, except that we compress deltas | |
| 1403 // between (bci,line) pairs since they are smaller. If (bci delta, line delta) fits in (5-bit unsigned, 3-bit unsigned) | |
| 1404 // we save it as one byte, otherwise we write a 0xFF escape character and use regular compression. 0x0 is used | |
| 1405 // as end-of-stream terminator. | |
| 1406 | |
| 1407 void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) { | |
| 1408 // bci and line number does not compress into single byte. | |
| 1409 // Write out escape character and use regular compression for bci and line number. | |
| 1410 write_byte((jubyte)0xFF); | |
| 1411 write_signed_int(bci_delta); | |
| 1412 write_signed_int(line_delta); | |
| 1413 } | |
| 1414 | |
| 1415 // See comment in methodOop.hpp which explains why this exists. | |
|
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1416 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
| 0 | 1417 #pragma optimize("", off) |
| 1418 void CompressedLineNumberWriteStream::write_pair(int bci, int line) { | |
| 1419 write_pair_inline(bci, line); | |
| 1420 } | |
| 1421 #pragma optimize("", on) | |
| 1422 #endif | |
| 1423 | |
| 1424 CompressedLineNumberReadStream::CompressedLineNumberReadStream(u_char* buffer) : CompressedReadStream(buffer) { | |
| 1425 _bci = 0; | |
| 1426 _line = 0; | |
| 1427 }; | |
| 1428 | |
| 1429 | |
| 1430 bool CompressedLineNumberReadStream::read_pair() { | |
| 1431 jubyte next = read_byte(); | |
| 1432 // Check for terminator | |
| 1433 if (next == 0) return false; | |
| 1434 if (next == 0xFF) { | |
| 1435 // Escape character, regular compression used | |
| 1436 _bci += read_signed_int(); | |
| 1437 _line += read_signed_int(); | |
| 1438 } else { | |
| 1439 // Single byte compression used | |
| 1440 _bci += next >> 3; | |
| 1441 _line += next & 0x7; | |
| 1442 } | |
| 1443 return true; | |
| 1444 } | |
| 1445 | |
| 1446 | |
| 2142 | 1447 Bytecodes::Code methodOopDesc::orig_bytecode_at(int bci) const { |
| 0 | 1448 BreakpointInfo* bp = instanceKlass::cast(method_holder())->breakpoints(); |
| 1449 for (; bp != NULL; bp = bp->next()) { | |
| 1450 if (bp->match(this, bci)) { | |
| 1451 return bp->orig_bytecode(); | |
| 1452 } | |
| 1453 } | |
| 1454 ShouldNotReachHere(); | |
| 1455 return Bytecodes::_shouldnotreachhere; | |
| 1456 } | |
| 1457 | |
| 1458 void methodOopDesc::set_orig_bytecode_at(int bci, Bytecodes::Code code) { | |
| 1459 assert(code != Bytecodes::_breakpoint, "cannot patch breakpoints this way"); | |
| 1460 BreakpointInfo* bp = instanceKlass::cast(method_holder())->breakpoints(); | |
| 1461 for (; bp != NULL; bp = bp->next()) { | |
| 1462 if (bp->match(this, bci)) { | |
| 1463 bp->set_orig_bytecode(code); | |
| 1464 // and continue, in case there is more than one | |
| 1465 } | |
| 1466 } | |
| 1467 } | |
| 1468 | |
| 1469 void methodOopDesc::set_breakpoint(int bci) { | |
| 1470 instanceKlass* ik = instanceKlass::cast(method_holder()); | |
| 1471 BreakpointInfo *bp = new BreakpointInfo(this, bci); | |
| 1472 bp->set_next(ik->breakpoints()); | |
| 1473 ik->set_breakpoints(bp); | |
| 1474 // do this last: | |
| 1475 bp->set(this); | |
| 1476 } | |
| 1477 | |
| 1478 static void clear_matches(methodOop m, int bci) { | |
| 1479 instanceKlass* ik = instanceKlass::cast(m->method_holder()); | |
| 1480 BreakpointInfo* prev_bp = NULL; | |
| 1481 BreakpointInfo* next_bp; | |
| 1482 for (BreakpointInfo* bp = ik->breakpoints(); bp != NULL; bp = next_bp) { | |
| 1483 next_bp = bp->next(); | |
| 1484 // bci value of -1 is used to delete all breakpoints in method m (ex: clear_all_breakpoint). | |
| 1485 if (bci >= 0 ? bp->match(m, bci) : bp->match(m)) { | |
| 1486 // do this first: | |
| 1487 bp->clear(m); | |
| 1488 // unhook it | |
| 1489 if (prev_bp != NULL) | |
| 1490 prev_bp->set_next(next_bp); | |
| 1491 else | |
| 1492 ik->set_breakpoints(next_bp); | |
| 1493 delete bp; | |
| 1494 // When class is redefined JVMTI sets breakpoint in all versions of EMCP methods | |
| 1495 // at same location. So we have multiple matching (method_index and bci) | |
| 1496 // BreakpointInfo nodes in BreakpointInfo list. We should just delete one | |
| 1497 // breakpoint for clear_breakpoint request and keep all other method versions | |
| 1498 // BreakpointInfo for future clear_breakpoint request. | |
| 1499 // bcivalue of -1 is used to clear all breakpoints (see clear_all_breakpoints) | |
| 1500 // which is being called when class is unloaded. We delete all the Breakpoint | |
| 1501 // information for all versions of method. We may not correctly restore the original | |
| 1502 // bytecode in all method versions, but that is ok. Because the class is being unloaded | |
| 1503 // so these methods won't be used anymore. | |
| 1504 if (bci >= 0) { | |
| 1505 break; | |
| 1506 } | |
| 1507 } else { | |
| 1508 // This one is a keeper. | |
| 1509 prev_bp = bp; | |
| 1510 } | |
| 1511 } | |
| 1512 } | |
| 1513 | |
| 1514 void methodOopDesc::clear_breakpoint(int bci) { | |
| 1515 assert(bci >= 0, ""); | |
| 1516 clear_matches(this, bci); | |
| 1517 } | |
| 1518 | |
| 1519 void methodOopDesc::clear_all_breakpoints() { | |
| 1520 clear_matches(this, -1); | |
| 1521 } | |
| 1522 | |
| 1523 | |
| 1783 | 1524 int methodOopDesc::invocation_count() { |
| 1525 if (TieredCompilation) { | |
| 1526 const methodDataOop mdo = method_data(); | |
| 1527 if (invocation_counter()->carry() || ((mdo != NULL) ? mdo->invocation_counter()->carry() : false)) { | |
| 1528 return InvocationCounter::count_limit; | |
| 1529 } else { | |
| 1530 return invocation_counter()->count() + ((mdo != NULL) ? mdo->invocation_counter()->count() : 0); | |
| 1531 } | |
| 1532 } else { | |
| 1533 return invocation_counter()->count(); | |
| 1534 } | |
| 1535 } | |
| 1536 | |
| 1537 int methodOopDesc::backedge_count() { | |
| 1538 if (TieredCompilation) { | |
| 1539 const methodDataOop mdo = method_data(); | |
| 1540 if (backedge_counter()->carry() || ((mdo != NULL) ? mdo->backedge_counter()->carry() : false)) { | |
| 1541 return InvocationCounter::count_limit; | |
| 1542 } else { | |
| 1543 return backedge_counter()->count() + ((mdo != NULL) ? mdo->backedge_counter()->count() : 0); | |
| 1544 } | |
| 1545 } else { | |
| 1546 return backedge_counter()->count(); | |
| 1547 } | |
| 1548 } | |
| 1549 | |
| 1550 int methodOopDesc::highest_comp_level() const { | |
| 1551 methodDataOop mdo = method_data(); | |
| 1552 if (mdo != NULL) { | |
| 1553 return mdo->highest_comp_level(); | |
| 1554 } else { | |
| 1555 return CompLevel_none; | |
| 1556 } | |
| 1557 } | |
| 1558 | |
| 1559 int methodOopDesc::highest_osr_comp_level() const { | |
| 1560 methodDataOop mdo = method_data(); | |
| 1561 if (mdo != NULL) { | |
| 1562 return mdo->highest_osr_comp_level(); | |
| 1563 } else { | |
| 1564 return CompLevel_none; | |
| 1565 } | |
| 1566 } | |
| 1567 | |
| 1568 void methodOopDesc::set_highest_comp_level(int level) { | |
| 1569 methodDataOop mdo = method_data(); | |
| 1570 if (mdo != NULL) { | |
| 1571 mdo->set_highest_comp_level(level); | |
| 1572 } | |
| 1573 } | |
| 1574 | |
| 1575 void methodOopDesc::set_highest_osr_comp_level(int level) { | |
| 1576 methodDataOop mdo = method_data(); | |
| 1577 if (mdo != NULL) { | |
| 1578 mdo->set_highest_osr_comp_level(level); | |
| 1579 } | |
| 1580 } | |
| 1581 | |
| 0 | 1582 BreakpointInfo::BreakpointInfo(methodOop m, int bci) { |
| 1583 _bci = bci; | |
| 1584 _name_index = m->name_index(); | |
| 1585 _signature_index = m->signature_index(); | |
| 1586 _orig_bytecode = (Bytecodes::Code) *m->bcp_from(_bci); | |
| 1587 if (_orig_bytecode == Bytecodes::_breakpoint) | |
| 1588 _orig_bytecode = m->orig_bytecode_at(_bci); | |
| 1589 _next = NULL; | |
| 1590 } | |
| 1591 | |
| 1592 void BreakpointInfo::set(methodOop method) { | |
| 1593 #ifdef ASSERT | |
| 1594 { | |
| 1595 Bytecodes::Code code = (Bytecodes::Code) *method->bcp_from(_bci); | |
| 1596 if (code == Bytecodes::_breakpoint) | |
| 1597 code = method->orig_bytecode_at(_bci); | |
| 1598 assert(orig_bytecode() == code, "original bytecode must be the same"); | |
| 1599 } | |
| 1600 #endif | |
| 1601 *method->bcp_from(_bci) = Bytecodes::_breakpoint; | |
| 1602 method->incr_number_of_breakpoints(); | |
| 1603 SystemDictionary::notice_modification(); | |
| 1604 { | |
| 1605 // Deoptimize all dependents on this method | |
| 1606 Thread *thread = Thread::current(); | |
| 1607 HandleMark hm(thread); | |
| 1608 methodHandle mh(thread, method); | |
| 1609 Universe::flush_dependents_on_method(mh); | |
| 1610 } | |
| 1611 } | |
| 1612 | |
| 1613 void BreakpointInfo::clear(methodOop method) { | |
| 1614 *method->bcp_from(_bci) = orig_bytecode(); | |
| 1615 assert(method->number_of_breakpoints() > 0, "must not go negative"); | |
| 1616 method->decr_number_of_breakpoints(); | |
| 1617 } |