Mercurial > hg > truffle
annotate src/share/vm/interpreter/interpreter.cpp @ 1644:2a47bd84841f
6965184: possible races in make_not_entrant_or_zombie
Reviewed-by: kvn
| author | never |
|---|---|
| date | Thu, 08 Jul 2010 14:29:44 -0700 |
| parents | 136b78722a08 |
| children | 126ea7725993 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1579 | 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 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_interpreter.cpp.incl" | |
| 27 | |
| 28 # define __ _masm-> | |
| 29 | |
| 30 | |
| 31 //------------------------------------------------------------------------------------------------------------------------ | |
| 32 // Implementation of InterpreterCodelet | |
| 33 | |
| 34 void InterpreterCodelet::initialize(const char* description, Bytecodes::Code bytecode) { | |
| 35 _description = description; | |
| 36 _bytecode = bytecode; | |
| 37 } | |
| 38 | |
| 39 | |
| 40 void InterpreterCodelet::verify() { | |
| 41 } | |
| 42 | |
| 43 | |
| 44 void InterpreterCodelet::print() { | |
| 45 if (PrintInterpreter) { | |
| 46 tty->cr(); | |
| 47 tty->print_cr("----------------------------------------------------------------------"); | |
| 48 } | |
| 49 | |
| 50 if (description() != NULL) tty->print("%s ", description()); | |
| 51 if (bytecode() >= 0 ) tty->print("%d %s ", bytecode(), Bytecodes::name(bytecode())); | |
| 52 tty->print_cr("[" INTPTR_FORMAT ", " INTPTR_FORMAT "] %d bytes", | |
| 53 code_begin(), code_end(), code_size()); | |
| 54 | |
| 55 if (PrintInterpreter) { | |
| 56 tty->cr(); | |
| 57 Disassembler::decode(code_begin(), code_end(), tty); | |
| 58 } | |
| 59 } | |
| 60 | |
| 61 | |
| 62 //------------------------------------------------------------------------------------------------------------------------ | |
| 63 // Implementation of platform independent aspects of Interpreter | |
| 64 | |
| 65 void AbstractInterpreter::initialize() { | |
| 66 if (_code != NULL) return; | |
| 67 | |
| 68 // make sure 'imported' classes are initialized | |
| 69 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) BytecodeCounter::reset(); | |
| 70 if (PrintBytecodeHistogram) BytecodeHistogram::reset(); | |
| 71 if (PrintBytecodePairHistogram) BytecodePairHistogram::reset(); | |
| 72 | |
| 73 InvocationCounter::reinitialize(DelayCompilationDuringStartup); | |
| 74 | |
| 75 } | |
| 76 | |
| 77 void AbstractInterpreter::print() { | |
| 78 tty->cr(); | |
| 79 tty->print_cr("----------------------------------------------------------------------"); | |
| 80 tty->print_cr("Interpreter"); | |
| 81 tty->cr(); | |
| 82 tty->print_cr("code size = %6dK bytes", (int)_code->used_space()/1024); | |
| 83 tty->print_cr("total space = %6dK bytes", (int)_code->total_space()/1024); | |
| 84 tty->print_cr("wasted space = %6dK bytes", (int)_code->available_space()/1024); | |
| 85 tty->cr(); | |
| 86 tty->print_cr("# of codelets = %6d" , _code->number_of_stubs()); | |
| 87 tty->print_cr("avg codelet size = %6d bytes", _code->used_space() / _code->number_of_stubs()); | |
| 88 tty->cr(); | |
| 89 _code->print(); | |
| 90 tty->print_cr("----------------------------------------------------------------------"); | |
| 91 tty->cr(); | |
| 92 } | |
| 93 | |
| 94 | |
| 95 void interpreter_init() { | |
| 96 Interpreter::initialize(); | |
| 97 #ifndef PRODUCT | |
| 98 if (TraceBytecodes) BytecodeTracer::set_closure(BytecodeTracer::std_closure()); | |
| 99 #endif // PRODUCT | |
| 100 // need to hit every safepoint in order to call zapping routine | |
| 101 // register the interpreter | |
| 102 Forte::register_stub( | |
| 103 "Interpreter", | |
| 104 AbstractInterpreter::code()->code_start(), | |
| 105 AbstractInterpreter::code()->code_end() | |
| 106 ); | |
| 107 | |
| 108 // notify JVMTI profiler | |
| 109 if (JvmtiExport::should_post_dynamic_code_generated()) { | |
| 110 JvmtiExport::post_dynamic_code_generated("Interpreter", | |
| 111 AbstractInterpreter::code()->code_start(), | |
| 112 AbstractInterpreter::code()->code_end()); | |
| 113 } | |
| 114 } | |
| 115 | |
| 116 //------------------------------------------------------------------------------------------------------------------------ | |
| 117 // Implementation of interpreter | |
| 118 | |
| 119 StubQueue* AbstractInterpreter::_code = NULL; | |
| 120 bool AbstractInterpreter::_notice_safepoints = false; | |
| 121 address AbstractInterpreter::_rethrow_exception_entry = NULL; | |
| 122 | |
| 123 address AbstractInterpreter::_native_entry_begin = NULL; | |
| 124 address AbstractInterpreter::_native_entry_end = NULL; | |
| 125 address AbstractInterpreter::_slow_signature_handler; | |
| 126 address AbstractInterpreter::_entry_table [AbstractInterpreter::number_of_method_entries]; | |
| 127 address AbstractInterpreter::_native_abi_to_tosca [AbstractInterpreter::number_of_result_handlers]; | |
| 128 | |
| 129 //------------------------------------------------------------------------------------------------------------------------ | |
| 130 // Generation of complete interpreter | |
| 131 | |
| 132 AbstractInterpreterGenerator::AbstractInterpreterGenerator(StubQueue* _code) { | |
| 133 _masm = NULL; | |
| 134 } | |
| 135 | |
| 136 | |
| 137 static const BasicType types[Interpreter::number_of_result_handlers] = { | |
| 138 T_BOOLEAN, | |
| 139 T_CHAR , | |
| 140 T_BYTE , | |
| 141 T_SHORT , | |
| 142 T_INT , | |
| 143 T_LONG , | |
| 144 T_VOID , | |
| 145 T_FLOAT , | |
| 146 T_DOUBLE , | |
| 147 T_OBJECT | |
| 148 }; | |
| 149 | |
| 150 void AbstractInterpreterGenerator::generate_all() { | |
| 151 | |
| 152 | |
| 153 { CodeletMark cm(_masm, "slow signature handler"); | |
| 154 Interpreter::_slow_signature_handler = generate_slow_signature_handler(); | |
| 155 } | |
| 156 | |
| 157 } | |
| 158 | |
| 159 //------------------------------------------------------------------------------------------------------------------------ | |
| 160 // Entry points | |
| 161 | |
| 162 AbstractInterpreter::MethodKind AbstractInterpreter::method_kind(methodHandle m) { | |
| 163 // Abstract method? | |
| 164 if (m->is_abstract()) return abstract; | |
| 165 | |
| 710 | 166 // Invoker for method handles? |
| 167 if (m->is_method_handle_invoke()) return method_handle; | |
| 168 | |
| 0 | 169 // Native method? |
| 170 // Note: This test must come _before_ the test for intrinsic | |
| 171 // methods. See also comments below. | |
| 172 if (m->is_native()) { | |
| 710 | 173 assert(!m->is_method_handle_invoke(), "overlapping bits here, watch out"); |
| 0 | 174 return m->is_synchronized() ? native_synchronized : native; |
| 175 } | |
| 176 | |
| 177 // Synchronized? | |
| 178 if (m->is_synchronized()) { | |
| 179 return zerolocals_synchronized; | |
| 180 } | |
| 181 | |
| 182 if (RegisterFinalizersAtInit && m->code_size() == 1 && | |
| 183 m->intrinsic_id() == vmIntrinsics::_Object_init) { | |
| 184 // We need to execute the special return bytecode to check for | |
| 185 // finalizer registration so create a normal frame. | |
| 186 return zerolocals; | |
| 187 } | |
| 188 | |
| 189 // Empty method? | |
| 190 if (m->is_empty_method()) { | |
| 191 return empty; | |
| 192 } | |
| 193 | |
| 194 // Accessor method? | |
| 195 if (m->is_accessor()) { | |
| 196 assert(m->size_of_parameters() == 1, "fast code for accessors assumes parameter size = 1"); | |
| 197 return accessor; | |
| 198 } | |
| 199 | |
| 200 // Special intrinsic method? | |
| 201 // Note: This test must come _after_ the test for native methods, | |
| 202 // otherwise we will run into problems with JDK 1.2, see also | |
| 203 // AbstractInterpreterGenerator::generate_method_entry() for | |
| 204 // for details. | |
| 205 switch (m->intrinsic_id()) { | |
| 206 case vmIntrinsics::_dsin : return java_lang_math_sin ; | |
| 207 case vmIntrinsics::_dcos : return java_lang_math_cos ; | |
| 208 case vmIntrinsics::_dtan : return java_lang_math_tan ; | |
| 209 case vmIntrinsics::_dabs : return java_lang_math_abs ; | |
| 210 case vmIntrinsics::_dsqrt : return java_lang_math_sqrt ; | |
| 211 case vmIntrinsics::_dlog : return java_lang_math_log ; | |
| 212 case vmIntrinsics::_dlog10: return java_lang_math_log10; | |
| 213 } | |
| 214 | |
| 215 // Note: for now: zero locals for all non-empty methods | |
| 216 return zerolocals; | |
| 217 } | |
| 218 | |
| 219 | |
| 220 // Return true if the interpreter can prove that the given bytecode has | |
| 221 // not yet been executed (in Java semantics, not in actual operation). | |
| 222 bool AbstractInterpreter::is_not_reached(methodHandle method, int bci) { | |
| 223 address bcp = method->bcp_from(bci); | |
| 1565 | 224 Bytecodes::Code code = Bytecodes::code_at(bcp, method()); |
| 0 | 225 |
| 1565 | 226 if (!Bytecode_at(bcp)->must_rewrite(code)) { |
| 0 | 227 // might have been reached |
| 228 return false; | |
| 229 } | |
| 230 | |
| 231 // the bytecode might not be rewritten if the method is an accessor, etc. | |
| 232 address ientry = method->interpreter_entry(); | |
| 233 if (ientry != entry_for_kind(AbstractInterpreter::zerolocals) && | |
| 234 ientry != entry_for_kind(AbstractInterpreter::zerolocals_synchronized)) | |
| 235 return false; // interpreter does not run this method! | |
| 236 | |
| 237 // otherwise, we can be sure this bytecode has never been executed | |
| 238 return true; | |
| 239 } | |
| 240 | |
| 241 | |
| 242 #ifndef PRODUCT | |
| 243 void AbstractInterpreter::print_method_kind(MethodKind kind) { | |
| 244 switch (kind) { | |
| 245 case zerolocals : tty->print("zerolocals" ); break; | |
| 246 case zerolocals_synchronized: tty->print("zerolocals_synchronized"); break; | |
| 247 case native : tty->print("native" ); break; | |
| 248 case native_synchronized : tty->print("native_synchronized" ); break; | |
| 249 case empty : tty->print("empty" ); break; | |
| 250 case accessor : tty->print("accessor" ); break; | |
| 251 case abstract : tty->print("abstract" ); break; | |
| 710 | 252 case method_handle : tty->print("method_handle" ); break; |
| 0 | 253 case java_lang_math_sin : tty->print("java_lang_math_sin" ); break; |
| 254 case java_lang_math_cos : tty->print("java_lang_math_cos" ); break; | |
| 255 case java_lang_math_tan : tty->print("java_lang_math_tan" ); break; | |
| 256 case java_lang_math_abs : tty->print("java_lang_math_abs" ); break; | |
| 257 case java_lang_math_sqrt : tty->print("java_lang_math_sqrt" ); break; | |
| 258 case java_lang_math_log : tty->print("java_lang_math_log" ); break; | |
| 259 case java_lang_math_log10 : tty->print("java_lang_math_log10" ); break; | |
| 260 default : ShouldNotReachHere(); | |
| 261 } | |
| 262 } | |
| 263 #endif // PRODUCT | |
| 264 | |
| 265 | |
| 266 //------------------------------------------------------------------------------------------------------------------------ | |
| 267 // Deoptimization support | |
| 268 | |
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269 // If deoptimization happens, this function returns the point of next bytecode to continue execution |
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270 address AbstractInterpreter::deopt_continue_after_entry(methodOop method, address bcp, int callee_parameters, bool is_top_frame) { |
| 0 | 271 assert(method->contains(bcp), "just checkin'"); |
| 272 Bytecodes::Code code = Bytecodes::java_code_at(bcp); | |
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273 assert(!Interpreter::bytecode_should_reexecute(code), "should not reexecute"); |
| 0 | 274 int bci = method->bci_from(bcp); |
| 275 int length = -1; // initial value for debugging | |
| 276 // compute continuation length | |
| 277 length = Bytecodes::length_at(bcp); | |
| 278 // compute result type | |
| 279 BasicType type = T_ILLEGAL; | |
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280 |
| 0 | 281 switch (code) { |
| 282 case Bytecodes::_invokevirtual : | |
| 283 case Bytecodes::_invokespecial : | |
| 284 case Bytecodes::_invokestatic : | |
| 285 case Bytecodes::_invokeinterface: { | |
| 286 Thread *thread = Thread::current(); | |
| 287 ResourceMark rm(thread); | |
| 288 methodHandle mh(thread, method); | |
| 289 type = Bytecode_invoke_at(mh, bci)->result_type(thread); | |
| 290 // since the cache entry might not be initialized: | |
| 291 // (NOT needed for the old calling convension) | |
| 292 if (!is_top_frame) { | |
| 293 int index = Bytes::get_native_u2(bcp+1); | |
| 294 method->constants()->cache()->entry_at(index)->set_parameter_size(callee_parameters); | |
| 295 } | |
| 296 break; | |
| 297 } | |
| 298 | |
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299 case Bytecodes::_invokedynamic: { |
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300 Thread *thread = Thread::current(); |
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301 ResourceMark rm(thread); |
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302 methodHandle mh(thread, method); |
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303 type = Bytecode_invoke_at(mh, bci)->result_type(thread); |
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304 // since the cache entry might not be initialized: |
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305 // (NOT needed for the old calling convension) |
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306 if (!is_top_frame) { |
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307 int index = Bytes::get_native_u4(bcp+1); |
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308 method->constants()->cache()->secondary_entry_at(index)->set_parameter_size(callee_parameters); |
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309 } |
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310 break; |
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311 } |
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312 |
| 0 | 313 case Bytecodes::_ldc : |
| 314 case Bytecodes::_ldc_w : // fall through | |
| 315 case Bytecodes::_ldc2_w: | |
| 1602 | 316 { |
| 317 Thread *thread = Thread::current(); | |
| 318 ResourceMark rm(thread); | |
| 319 methodHandle mh(thread, method); | |
| 320 type = Bytecode_loadconstant_at(mh, bci)->result_type(); | |
| 321 break; | |
| 322 } | |
| 0 | 323 |
| 324 default: | |
| 325 type = Bytecodes::result_type(code); | |
| 326 break; | |
| 327 } | |
| 328 | |
| 329 // return entry point for computed continuation state & bytecode length | |
| 330 return | |
| 331 is_top_frame | |
| 332 ? Interpreter::deopt_entry (as_TosState(type), length) | |
| 333 : Interpreter::return_entry(as_TosState(type), length); | |
| 334 } | |
| 335 | |
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336 // If deoptimization happens, this function returns the point where the interpreter reexecutes |
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337 // the bytecode. |
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338 // Note: Bytecodes::_athrow is a special case in that it does not return |
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339 // Interpreter::deopt_entry(vtos, 0) like others |
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340 address AbstractInterpreter::deopt_reexecute_entry(methodOop method, address bcp) { |
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341 assert(method->contains(bcp), "just checkin'"); |
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342 Bytecodes::Code code = Bytecodes::java_code_at(bcp); |
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343 #ifdef COMPILER1 |
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344 if(code == Bytecodes::_athrow ) { |
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345 return Interpreter::rethrow_exception_entry(); |
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346 } |
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347 #endif /* COMPILER1 */ |
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348 return Interpreter::deopt_entry(vtos, 0); |
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349 } |
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350 |
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351 // If deoptimization happens, the interpreter should reexecute these bytecodes. |
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352 // This function mainly helps the compilers to set up the reexecute bit. |
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353 bool AbstractInterpreter::bytecode_should_reexecute(Bytecodes::Code code) { |
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354 switch (code) { |
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355 case Bytecodes::_lookupswitch: |
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356 case Bytecodes::_tableswitch: |
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357 case Bytecodes::_fast_binaryswitch: |
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358 case Bytecodes::_fast_linearswitch: |
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359 // recompute condtional expression folded into _if<cond> |
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360 case Bytecodes::_lcmp : |
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361 case Bytecodes::_fcmpl : |
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362 case Bytecodes::_fcmpg : |
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363 case Bytecodes::_dcmpl : |
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364 case Bytecodes::_dcmpg : |
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365 case Bytecodes::_ifnull : |
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366 case Bytecodes::_ifnonnull : |
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367 case Bytecodes::_goto : |
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368 case Bytecodes::_goto_w : |
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369 case Bytecodes::_ifeq : |
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370 case Bytecodes::_ifne : |
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371 case Bytecodes::_iflt : |
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372 case Bytecodes::_ifge : |
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373 case Bytecodes::_ifgt : |
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374 case Bytecodes::_ifle : |
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375 case Bytecodes::_if_icmpeq : |
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376 case Bytecodes::_if_icmpne : |
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377 case Bytecodes::_if_icmplt : |
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378 case Bytecodes::_if_icmpge : |
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379 case Bytecodes::_if_icmpgt : |
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380 case Bytecodes::_if_icmple : |
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381 case Bytecodes::_if_acmpeq : |
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382 case Bytecodes::_if_acmpne : |
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383 // special cases |
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384 case Bytecodes::_getfield : |
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385 case Bytecodes::_putfield : |
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386 case Bytecodes::_getstatic : |
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387 case Bytecodes::_putstatic : |
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388 case Bytecodes::_aastore : |
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389 #ifdef COMPILER1 |
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390 //special case of reexecution |
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391 case Bytecodes::_athrow : |
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392 #endif |
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393 return true; |
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394 |
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395 default: |
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396 return false; |
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397 } |
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398 } |
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399 |
| 0 | 400 void AbstractInterpreterGenerator::bang_stack_shadow_pages(bool native_call) { |
| 401 // Quick & dirty stack overflow checking: bang the stack & handle trap. | |
| 402 // Note that we do the banging after the frame is setup, since the exception | |
| 403 // handling code expects to find a valid interpreter frame on the stack. | |
| 404 // Doing the banging earlier fails if the caller frame is not an interpreter | |
| 405 // frame. | |
| 406 // (Also, the exception throwing code expects to unlock any synchronized | |
| 407 // method receiever, so do the banging after locking the receiver.) | |
| 408 | |
| 409 // Bang each page in the shadow zone. We can't assume it's been done for | |
| 410 // an interpreter frame with greater than a page of locals, so each page | |
| 411 // needs to be checked. Only true for non-native. | |
| 412 if (UseStackBanging) { | |
| 413 const int start_page = native_call ? StackShadowPages : 1; | |
| 414 const int page_size = os::vm_page_size(); | |
| 415 for (int pages = start_page; pages <= StackShadowPages ; pages++) { | |
| 416 __ bang_stack_with_offset(pages*page_size); | |
| 417 } | |
| 418 } | |
| 419 } |