Sat, 01 Sep 2012 13:25:18 -0400
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
duke@435 | 1 | /* |
coleenp@4037 | 2 | * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
stefank@2314 | 26 | #include "asm/assembler.hpp" |
stefank@2314 | 27 | #include "interpreter/bytecodeHistogram.hpp" |
stefank@2314 | 28 | #include "interpreter/bytecodeInterpreter.hpp" |
stefank@2314 | 29 | #include "interpreter/interpreter.hpp" |
stefank@2314 | 30 | #include "interpreter/interpreterRuntime.hpp" |
stefank@2314 | 31 | #include "interpreter/templateTable.hpp" |
stefank@2314 | 32 | #include "memory/allocation.inline.hpp" |
stefank@2314 | 33 | #include "memory/resourceArea.hpp" |
stefank@2314 | 34 | #include "oops/arrayOop.hpp" |
coleenp@4037 | 35 | #include "oops/methodData.hpp" |
coleenp@4037 | 36 | #include "oops/method.hpp" |
stefank@2314 | 37 | #include "oops/oop.inline.hpp" |
stefank@2314 | 38 | #include "prims/forte.hpp" |
stefank@2314 | 39 | #include "prims/jvmtiExport.hpp" |
twisti@3969 | 40 | #include "prims/methodHandles.hpp" |
stefank@2314 | 41 | #include "runtime/handles.inline.hpp" |
stefank@2314 | 42 | #include "runtime/sharedRuntime.hpp" |
stefank@2314 | 43 | #include "runtime/stubRoutines.hpp" |
stefank@2314 | 44 | #include "runtime/timer.hpp" |
duke@435 | 45 | |
duke@435 | 46 | # define __ _masm-> |
duke@435 | 47 | |
duke@435 | 48 | |
duke@435 | 49 | //------------------------------------------------------------------------------------------------------------------------ |
duke@435 | 50 | // Implementation of InterpreterCodelet |
duke@435 | 51 | |
duke@435 | 52 | void InterpreterCodelet::initialize(const char* description, Bytecodes::Code bytecode) { |
duke@435 | 53 | _description = description; |
duke@435 | 54 | _bytecode = bytecode; |
duke@435 | 55 | } |
duke@435 | 56 | |
duke@435 | 57 | |
duke@435 | 58 | void InterpreterCodelet::verify() { |
duke@435 | 59 | } |
duke@435 | 60 | |
duke@435 | 61 | |
bobv@2036 | 62 | void InterpreterCodelet::print_on(outputStream* st) const { |
duke@435 | 63 | if (PrintInterpreter) { |
bobv@2036 | 64 | st->cr(); |
bobv@2036 | 65 | st->print_cr("----------------------------------------------------------------------"); |
duke@435 | 66 | } |
duke@435 | 67 | |
bobv@2036 | 68 | if (description() != NULL) st->print("%s ", description()); |
bobv@2036 | 69 | if (bytecode() >= 0 ) st->print("%d %s ", bytecode(), Bytecodes::name(bytecode())); |
bobv@2036 | 70 | st->print_cr("[" INTPTR_FORMAT ", " INTPTR_FORMAT "] %d bytes", |
duke@435 | 71 | code_begin(), code_end(), code_size()); |
duke@435 | 72 | |
duke@435 | 73 | if (PrintInterpreter) { |
bobv@2036 | 74 | st->cr(); |
bobv@2036 | 75 | Disassembler::decode(code_begin(), code_end(), st); |
duke@435 | 76 | } |
duke@435 | 77 | } |
duke@435 | 78 | |
duke@435 | 79 | |
duke@435 | 80 | //------------------------------------------------------------------------------------------------------------------------ |
duke@435 | 81 | // Implementation of platform independent aspects of Interpreter |
duke@435 | 82 | |
duke@435 | 83 | void AbstractInterpreter::initialize() { |
duke@435 | 84 | if (_code != NULL) return; |
duke@435 | 85 | |
duke@435 | 86 | // make sure 'imported' classes are initialized |
duke@435 | 87 | if (CountBytecodes || TraceBytecodes || StopInterpreterAt) BytecodeCounter::reset(); |
duke@435 | 88 | if (PrintBytecodeHistogram) BytecodeHistogram::reset(); |
duke@435 | 89 | if (PrintBytecodePairHistogram) BytecodePairHistogram::reset(); |
duke@435 | 90 | |
duke@435 | 91 | InvocationCounter::reinitialize(DelayCompilationDuringStartup); |
duke@435 | 92 | |
duke@435 | 93 | } |
duke@435 | 94 | |
duke@435 | 95 | void AbstractInterpreter::print() { |
duke@435 | 96 | tty->cr(); |
duke@435 | 97 | tty->print_cr("----------------------------------------------------------------------"); |
duke@435 | 98 | tty->print_cr("Interpreter"); |
duke@435 | 99 | tty->cr(); |
duke@435 | 100 | tty->print_cr("code size = %6dK bytes", (int)_code->used_space()/1024); |
duke@435 | 101 | tty->print_cr("total space = %6dK bytes", (int)_code->total_space()/1024); |
duke@435 | 102 | tty->print_cr("wasted space = %6dK bytes", (int)_code->available_space()/1024); |
duke@435 | 103 | tty->cr(); |
duke@435 | 104 | tty->print_cr("# of codelets = %6d" , _code->number_of_stubs()); |
duke@435 | 105 | tty->print_cr("avg codelet size = %6d bytes", _code->used_space() / _code->number_of_stubs()); |
duke@435 | 106 | tty->cr(); |
duke@435 | 107 | _code->print(); |
duke@435 | 108 | tty->print_cr("----------------------------------------------------------------------"); |
duke@435 | 109 | tty->cr(); |
duke@435 | 110 | } |
duke@435 | 111 | |
duke@435 | 112 | |
duke@435 | 113 | void interpreter_init() { |
duke@435 | 114 | Interpreter::initialize(); |
duke@435 | 115 | #ifndef PRODUCT |
duke@435 | 116 | if (TraceBytecodes) BytecodeTracer::set_closure(BytecodeTracer::std_closure()); |
duke@435 | 117 | #endif // PRODUCT |
duke@435 | 118 | // need to hit every safepoint in order to call zapping routine |
duke@435 | 119 | // register the interpreter |
duke@435 | 120 | Forte::register_stub( |
duke@435 | 121 | "Interpreter", |
duke@435 | 122 | AbstractInterpreter::code()->code_start(), |
duke@435 | 123 | AbstractInterpreter::code()->code_end() |
duke@435 | 124 | ); |
duke@435 | 125 | |
duke@435 | 126 | // notify JVMTI profiler |
duke@435 | 127 | if (JvmtiExport::should_post_dynamic_code_generated()) { |
duke@435 | 128 | JvmtiExport::post_dynamic_code_generated("Interpreter", |
duke@435 | 129 | AbstractInterpreter::code()->code_start(), |
duke@435 | 130 | AbstractInterpreter::code()->code_end()); |
duke@435 | 131 | } |
duke@435 | 132 | } |
duke@435 | 133 | |
duke@435 | 134 | //------------------------------------------------------------------------------------------------------------------------ |
duke@435 | 135 | // Implementation of interpreter |
duke@435 | 136 | |
duke@435 | 137 | StubQueue* AbstractInterpreter::_code = NULL; |
duke@435 | 138 | bool AbstractInterpreter::_notice_safepoints = false; |
duke@435 | 139 | address AbstractInterpreter::_rethrow_exception_entry = NULL; |
duke@435 | 140 | |
duke@435 | 141 | address AbstractInterpreter::_native_entry_begin = NULL; |
duke@435 | 142 | address AbstractInterpreter::_native_entry_end = NULL; |
duke@435 | 143 | address AbstractInterpreter::_slow_signature_handler; |
duke@435 | 144 | address AbstractInterpreter::_entry_table [AbstractInterpreter::number_of_method_entries]; |
duke@435 | 145 | address AbstractInterpreter::_native_abi_to_tosca [AbstractInterpreter::number_of_result_handlers]; |
duke@435 | 146 | |
duke@435 | 147 | //------------------------------------------------------------------------------------------------------------------------ |
duke@435 | 148 | // Generation of complete interpreter |
duke@435 | 149 | |
duke@435 | 150 | AbstractInterpreterGenerator::AbstractInterpreterGenerator(StubQueue* _code) { |
duke@435 | 151 | _masm = NULL; |
duke@435 | 152 | } |
duke@435 | 153 | |
duke@435 | 154 | |
duke@435 | 155 | static const BasicType types[Interpreter::number_of_result_handlers] = { |
duke@435 | 156 | T_BOOLEAN, |
duke@435 | 157 | T_CHAR , |
duke@435 | 158 | T_BYTE , |
duke@435 | 159 | T_SHORT , |
duke@435 | 160 | T_INT , |
duke@435 | 161 | T_LONG , |
duke@435 | 162 | T_VOID , |
duke@435 | 163 | T_FLOAT , |
duke@435 | 164 | T_DOUBLE , |
duke@435 | 165 | T_OBJECT |
duke@435 | 166 | }; |
duke@435 | 167 | |
duke@435 | 168 | void AbstractInterpreterGenerator::generate_all() { |
duke@435 | 169 | |
duke@435 | 170 | |
duke@435 | 171 | { CodeletMark cm(_masm, "slow signature handler"); |
duke@435 | 172 | Interpreter::_slow_signature_handler = generate_slow_signature_handler(); |
duke@435 | 173 | } |
duke@435 | 174 | |
duke@435 | 175 | } |
duke@435 | 176 | |
duke@435 | 177 | //------------------------------------------------------------------------------------------------------------------------ |
duke@435 | 178 | // Entry points |
duke@435 | 179 | |
duke@435 | 180 | AbstractInterpreter::MethodKind AbstractInterpreter::method_kind(methodHandle m) { |
duke@435 | 181 | // Abstract method? |
duke@435 | 182 | if (m->is_abstract()) return abstract; |
duke@435 | 183 | |
twisti@3969 | 184 | // Method handle primitive? |
twisti@3969 | 185 | if (m->is_method_handle_intrinsic()) { |
twisti@3969 | 186 | vmIntrinsics::ID id = m->intrinsic_id(); |
twisti@3969 | 187 | assert(MethodHandles::is_signature_polymorphic(id), "must match an intrinsic"); |
twisti@3969 | 188 | MethodKind kind = (MethodKind)( method_handle_invoke_FIRST + |
twisti@3969 | 189 | ((int)id - vmIntrinsics::FIRST_MH_SIG_POLY) ); |
twisti@3969 | 190 | assert(kind <= method_handle_invoke_LAST, "parallel enum ranges"); |
twisti@3969 | 191 | return kind; |
twisti@3969 | 192 | } |
jrose@1145 | 193 | |
duke@435 | 194 | // Native method? |
duke@435 | 195 | // Note: This test must come _before_ the test for intrinsic |
duke@435 | 196 | // methods. See also comments below. |
duke@435 | 197 | if (m->is_native()) { |
twisti@3969 | 198 | assert(!m->is_method_handle_intrinsic(), "overlapping bits here, watch out"); |
duke@435 | 199 | return m->is_synchronized() ? native_synchronized : native; |
duke@435 | 200 | } |
duke@435 | 201 | |
duke@435 | 202 | // Synchronized? |
duke@435 | 203 | if (m->is_synchronized()) { |
duke@435 | 204 | return zerolocals_synchronized; |
duke@435 | 205 | } |
duke@435 | 206 | |
duke@435 | 207 | if (RegisterFinalizersAtInit && m->code_size() == 1 && |
duke@435 | 208 | m->intrinsic_id() == vmIntrinsics::_Object_init) { |
duke@435 | 209 | // We need to execute the special return bytecode to check for |
duke@435 | 210 | // finalizer registration so create a normal frame. |
duke@435 | 211 | return zerolocals; |
duke@435 | 212 | } |
duke@435 | 213 | |
duke@435 | 214 | // Empty method? |
duke@435 | 215 | if (m->is_empty_method()) { |
duke@435 | 216 | return empty; |
duke@435 | 217 | } |
duke@435 | 218 | |
duke@435 | 219 | // Special intrinsic method? |
duke@435 | 220 | // Note: This test must come _after_ the test for native methods, |
duke@435 | 221 | // otherwise we will run into problems with JDK 1.2, see also |
duke@435 | 222 | // AbstractInterpreterGenerator::generate_method_entry() for |
duke@435 | 223 | // for details. |
duke@435 | 224 | switch (m->intrinsic_id()) { |
duke@435 | 225 | case vmIntrinsics::_dsin : return java_lang_math_sin ; |
duke@435 | 226 | case vmIntrinsics::_dcos : return java_lang_math_cos ; |
duke@435 | 227 | case vmIntrinsics::_dtan : return java_lang_math_tan ; |
duke@435 | 228 | case vmIntrinsics::_dabs : return java_lang_math_abs ; |
duke@435 | 229 | case vmIntrinsics::_dsqrt : return java_lang_math_sqrt ; |
duke@435 | 230 | case vmIntrinsics::_dlog : return java_lang_math_log ; |
duke@435 | 231 | case vmIntrinsics::_dlog10: return java_lang_math_log10; |
roland@3787 | 232 | case vmIntrinsics::_dpow : return java_lang_math_pow ; |
roland@3787 | 233 | case vmIntrinsics::_dexp : return java_lang_math_exp ; |
johnc@2781 | 234 | |
johnc@2781 | 235 | case vmIntrinsics::_Reference_get: |
johnc@2781 | 236 | return java_lang_ref_reference_get; |
johnc@2781 | 237 | } |
johnc@2781 | 238 | |
johnc@2781 | 239 | // Accessor method? |
johnc@2781 | 240 | if (m->is_accessor()) { |
johnc@2781 | 241 | assert(m->size_of_parameters() == 1, "fast code for accessors assumes parameter size = 1"); |
johnc@2781 | 242 | return accessor; |
duke@435 | 243 | } |
duke@435 | 244 | |
duke@435 | 245 | // Note: for now: zero locals for all non-empty methods |
duke@435 | 246 | return zerolocals; |
duke@435 | 247 | } |
duke@435 | 248 | |
duke@435 | 249 | |
twisti@3969 | 250 | void AbstractInterpreter::set_entry_for_kind(AbstractInterpreter::MethodKind kind, address entry) { |
twisti@3969 | 251 | assert(kind >= method_handle_invoke_FIRST && |
twisti@3969 | 252 | kind <= method_handle_invoke_LAST, "late initialization only for MH entry points"); |
twisti@3969 | 253 | assert(_entry_table[kind] == _entry_table[abstract], "previous value must be AME entry"); |
twisti@3969 | 254 | _entry_table[kind] = entry; |
twisti@3969 | 255 | } |
twisti@3969 | 256 | |
twisti@3969 | 257 | |
duke@435 | 258 | // Return true if the interpreter can prove that the given bytecode has |
duke@435 | 259 | // not yet been executed (in Java semantics, not in actual operation). |
duke@435 | 260 | bool AbstractInterpreter::is_not_reached(methodHandle method, int bci) { |
never@2462 | 261 | Bytecodes::Code code = method()->code_at(bci); |
duke@435 | 262 | |
never@2462 | 263 | if (!Bytecodes::must_rewrite(code)) { |
duke@435 | 264 | // might have been reached |
duke@435 | 265 | return false; |
duke@435 | 266 | } |
duke@435 | 267 | |
duke@435 | 268 | // the bytecode might not be rewritten if the method is an accessor, etc. |
duke@435 | 269 | address ientry = method->interpreter_entry(); |
duke@435 | 270 | if (ientry != entry_for_kind(AbstractInterpreter::zerolocals) && |
duke@435 | 271 | ientry != entry_for_kind(AbstractInterpreter::zerolocals_synchronized)) |
duke@435 | 272 | return false; // interpreter does not run this method! |
duke@435 | 273 | |
duke@435 | 274 | // otherwise, we can be sure this bytecode has never been executed |
duke@435 | 275 | return true; |
duke@435 | 276 | } |
duke@435 | 277 | |
duke@435 | 278 | |
duke@435 | 279 | #ifndef PRODUCT |
duke@435 | 280 | void AbstractInterpreter::print_method_kind(MethodKind kind) { |
duke@435 | 281 | switch (kind) { |
duke@435 | 282 | case zerolocals : tty->print("zerolocals" ); break; |
duke@435 | 283 | case zerolocals_synchronized: tty->print("zerolocals_synchronized"); break; |
duke@435 | 284 | case native : tty->print("native" ); break; |
duke@435 | 285 | case native_synchronized : tty->print("native_synchronized" ); break; |
duke@435 | 286 | case empty : tty->print("empty" ); break; |
duke@435 | 287 | case accessor : tty->print("accessor" ); break; |
duke@435 | 288 | case abstract : tty->print("abstract" ); break; |
duke@435 | 289 | case java_lang_math_sin : tty->print("java_lang_math_sin" ); break; |
duke@435 | 290 | case java_lang_math_cos : tty->print("java_lang_math_cos" ); break; |
duke@435 | 291 | case java_lang_math_tan : tty->print("java_lang_math_tan" ); break; |
duke@435 | 292 | case java_lang_math_abs : tty->print("java_lang_math_abs" ); break; |
duke@435 | 293 | case java_lang_math_sqrt : tty->print("java_lang_math_sqrt" ); break; |
duke@435 | 294 | case java_lang_math_log : tty->print("java_lang_math_log" ); break; |
duke@435 | 295 | case java_lang_math_log10 : tty->print("java_lang_math_log10" ); break; |
twisti@3969 | 296 | default: |
twisti@3969 | 297 | if (kind >= method_handle_invoke_FIRST && |
twisti@3969 | 298 | kind <= method_handle_invoke_LAST) { |
twisti@3969 | 299 | const char* kind_name = vmIntrinsics::name_at(method_handle_intrinsic(kind)); |
twisti@3969 | 300 | if (kind_name[0] == '_') kind_name = &kind_name[1]; // '_invokeExact' => 'invokeExact' |
twisti@3969 | 301 | tty->print("method_handle_%s", kind_name); |
twisti@3969 | 302 | break; |
twisti@3969 | 303 | } |
twisti@3969 | 304 | ShouldNotReachHere(); |
twisti@3969 | 305 | break; |
duke@435 | 306 | } |
duke@435 | 307 | } |
duke@435 | 308 | #endif // PRODUCT |
duke@435 | 309 | |
duke@435 | 310 | |
duke@435 | 311 | //------------------------------------------------------------------------------------------------------------------------ |
duke@435 | 312 | // Deoptimization support |
duke@435 | 313 | |
cfang@1335 | 314 | // If deoptimization happens, this function returns the point of next bytecode to continue execution |
coleenp@4037 | 315 | address AbstractInterpreter::deopt_continue_after_entry(Method* method, address bcp, int callee_parameters, bool is_top_frame) { |
duke@435 | 316 | assert(method->contains(bcp), "just checkin'"); |
never@2462 | 317 | Bytecodes::Code code = Bytecodes::java_code_at(method, bcp); |
cfang@1335 | 318 | assert(!Interpreter::bytecode_should_reexecute(code), "should not reexecute"); |
duke@435 | 319 | int bci = method->bci_from(bcp); |
duke@435 | 320 | int length = -1; // initial value for debugging |
duke@435 | 321 | // compute continuation length |
never@2462 | 322 | length = Bytecodes::length_at(method, bcp); |
duke@435 | 323 | // compute result type |
duke@435 | 324 | BasicType type = T_ILLEGAL; |
cfang@1335 | 325 | |
duke@435 | 326 | switch (code) { |
duke@435 | 327 | case Bytecodes::_invokevirtual : |
duke@435 | 328 | case Bytecodes::_invokespecial : |
duke@435 | 329 | case Bytecodes::_invokestatic : |
duke@435 | 330 | case Bytecodes::_invokeinterface: { |
duke@435 | 331 | Thread *thread = Thread::current(); |
duke@435 | 332 | ResourceMark rm(thread); |
duke@435 | 333 | methodHandle mh(thread, method); |
coleenp@2497 | 334 | type = Bytecode_invoke(mh, bci).result_type(); |
duke@435 | 335 | // since the cache entry might not be initialized: |
duke@435 | 336 | // (NOT needed for the old calling convension) |
duke@435 | 337 | if (!is_top_frame) { |
duke@435 | 338 | int index = Bytes::get_native_u2(bcp+1); |
duke@435 | 339 | method->constants()->cache()->entry_at(index)->set_parameter_size(callee_parameters); |
duke@435 | 340 | } |
duke@435 | 341 | break; |
duke@435 | 342 | } |
duke@435 | 343 | |
jrose@1494 | 344 | case Bytecodes::_invokedynamic: { |
jrose@1494 | 345 | Thread *thread = Thread::current(); |
jrose@1494 | 346 | ResourceMark rm(thread); |
jrose@1494 | 347 | methodHandle mh(thread, method); |
coleenp@2497 | 348 | type = Bytecode_invoke(mh, bci).result_type(); |
jrose@1494 | 349 | // since the cache entry might not be initialized: |
jrose@1494 | 350 | // (NOT needed for the old calling convension) |
jrose@1494 | 351 | if (!is_top_frame) { |
jrose@1494 | 352 | int index = Bytes::get_native_u4(bcp+1); |
coleenp@4037 | 353 | method->constants()->invokedynamic_cp_cache_entry_at(index)->set_parameter_size(callee_parameters); |
jrose@1494 | 354 | } |
jrose@1494 | 355 | break; |
jrose@1494 | 356 | } |
jrose@1494 | 357 | |
duke@435 | 358 | case Bytecodes::_ldc : |
duke@435 | 359 | case Bytecodes::_ldc_w : // fall through |
duke@435 | 360 | case Bytecodes::_ldc2_w: |
jrose@1957 | 361 | { |
jrose@1957 | 362 | Thread *thread = Thread::current(); |
jrose@1957 | 363 | ResourceMark rm(thread); |
jrose@1957 | 364 | methodHandle mh(thread, method); |
never@2462 | 365 | type = Bytecode_loadconstant(mh, bci).result_type(); |
jrose@1957 | 366 | break; |
jrose@1957 | 367 | } |
duke@435 | 368 | |
duke@435 | 369 | default: |
duke@435 | 370 | type = Bytecodes::result_type(code); |
duke@435 | 371 | break; |
duke@435 | 372 | } |
duke@435 | 373 | |
duke@435 | 374 | // return entry point for computed continuation state & bytecode length |
duke@435 | 375 | return |
duke@435 | 376 | is_top_frame |
duke@435 | 377 | ? Interpreter::deopt_entry (as_TosState(type), length) |
duke@435 | 378 | : Interpreter::return_entry(as_TosState(type), length); |
duke@435 | 379 | } |
duke@435 | 380 | |
cfang@1335 | 381 | // If deoptimization happens, this function returns the point where the interpreter reexecutes |
cfang@1335 | 382 | // the bytecode. |
cfang@1335 | 383 | // Note: Bytecodes::_athrow is a special case in that it does not return |
cfang@1335 | 384 | // Interpreter::deopt_entry(vtos, 0) like others |
coleenp@4037 | 385 | address AbstractInterpreter::deopt_reexecute_entry(Method* method, address bcp) { |
cfang@1335 | 386 | assert(method->contains(bcp), "just checkin'"); |
never@2462 | 387 | Bytecodes::Code code = Bytecodes::java_code_at(method, bcp); |
cfang@1335 | 388 | #ifdef COMPILER1 |
cfang@1335 | 389 | if(code == Bytecodes::_athrow ) { |
cfang@1335 | 390 | return Interpreter::rethrow_exception_entry(); |
cfang@1335 | 391 | } |
cfang@1335 | 392 | #endif /* COMPILER1 */ |
cfang@1335 | 393 | return Interpreter::deopt_entry(vtos, 0); |
cfang@1335 | 394 | } |
cfang@1335 | 395 | |
cfang@1335 | 396 | // If deoptimization happens, the interpreter should reexecute these bytecodes. |
cfang@1335 | 397 | // This function mainly helps the compilers to set up the reexecute bit. |
cfang@1335 | 398 | bool AbstractInterpreter::bytecode_should_reexecute(Bytecodes::Code code) { |
cfang@1335 | 399 | switch (code) { |
cfang@1335 | 400 | case Bytecodes::_lookupswitch: |
cfang@1335 | 401 | case Bytecodes::_tableswitch: |
cfang@1335 | 402 | case Bytecodes::_fast_binaryswitch: |
cfang@1335 | 403 | case Bytecodes::_fast_linearswitch: |
cfang@1335 | 404 | // recompute condtional expression folded into _if<cond> |
cfang@1335 | 405 | case Bytecodes::_lcmp : |
cfang@1335 | 406 | case Bytecodes::_fcmpl : |
cfang@1335 | 407 | case Bytecodes::_fcmpg : |
cfang@1335 | 408 | case Bytecodes::_dcmpl : |
cfang@1335 | 409 | case Bytecodes::_dcmpg : |
cfang@1335 | 410 | case Bytecodes::_ifnull : |
cfang@1335 | 411 | case Bytecodes::_ifnonnull : |
cfang@1335 | 412 | case Bytecodes::_goto : |
cfang@1335 | 413 | case Bytecodes::_goto_w : |
cfang@1335 | 414 | case Bytecodes::_ifeq : |
cfang@1335 | 415 | case Bytecodes::_ifne : |
cfang@1335 | 416 | case Bytecodes::_iflt : |
cfang@1335 | 417 | case Bytecodes::_ifge : |
cfang@1335 | 418 | case Bytecodes::_ifgt : |
cfang@1335 | 419 | case Bytecodes::_ifle : |
cfang@1335 | 420 | case Bytecodes::_if_icmpeq : |
cfang@1335 | 421 | case Bytecodes::_if_icmpne : |
cfang@1335 | 422 | case Bytecodes::_if_icmplt : |
cfang@1335 | 423 | case Bytecodes::_if_icmpge : |
cfang@1335 | 424 | case Bytecodes::_if_icmpgt : |
cfang@1335 | 425 | case Bytecodes::_if_icmple : |
cfang@1335 | 426 | case Bytecodes::_if_acmpeq : |
cfang@1335 | 427 | case Bytecodes::_if_acmpne : |
cfang@1335 | 428 | // special cases |
cfang@1335 | 429 | case Bytecodes::_getfield : |
cfang@1335 | 430 | case Bytecodes::_putfield : |
cfang@1335 | 431 | case Bytecodes::_getstatic : |
cfang@1335 | 432 | case Bytecodes::_putstatic : |
cfang@1335 | 433 | case Bytecodes::_aastore : |
cfang@1335 | 434 | #ifdef COMPILER1 |
cfang@1335 | 435 | //special case of reexecution |
cfang@1335 | 436 | case Bytecodes::_athrow : |
cfang@1335 | 437 | #endif |
cfang@1335 | 438 | return true; |
cfang@1335 | 439 | |
cfang@1335 | 440 | default: |
cfang@1335 | 441 | return false; |
cfang@1335 | 442 | } |
cfang@1335 | 443 | } |
cfang@1335 | 444 | |
duke@435 | 445 | void AbstractInterpreterGenerator::bang_stack_shadow_pages(bool native_call) { |
duke@435 | 446 | // Quick & dirty stack overflow checking: bang the stack & handle trap. |
duke@435 | 447 | // Note that we do the banging after the frame is setup, since the exception |
duke@435 | 448 | // handling code expects to find a valid interpreter frame on the stack. |
duke@435 | 449 | // Doing the banging earlier fails if the caller frame is not an interpreter |
duke@435 | 450 | // frame. |
duke@435 | 451 | // (Also, the exception throwing code expects to unlock any synchronized |
duke@435 | 452 | // method receiever, so do the banging after locking the receiver.) |
duke@435 | 453 | |
duke@435 | 454 | // Bang each page in the shadow zone. We can't assume it's been done for |
duke@435 | 455 | // an interpreter frame with greater than a page of locals, so each page |
duke@435 | 456 | // needs to be checked. Only true for non-native. |
duke@435 | 457 | if (UseStackBanging) { |
duke@435 | 458 | const int start_page = native_call ? StackShadowPages : 1; |
duke@435 | 459 | const int page_size = os::vm_page_size(); |
duke@435 | 460 | for (int pages = start_page; pages <= StackShadowPages ; pages++) { |
duke@435 | 461 | __ bang_stack_with_offset(pages*page_size); |
duke@435 | 462 | } |
duke@435 | 463 | } |
duke@435 | 464 | } |