Mercurial > hg > graal-compiler
annotate src/share/vm/c1/c1_Runtime1.cpp @ 6275:957c266d8bc5
Merge with http://hg.openjdk.java.net/hsx/hsx24/hotspot/
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Tue, 21 Aug 2012 10:39:19 +0200 |
| parents | 143e68e4e4d3 8f37087fc13f |
| children | 077fd901d7c7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 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 "asm/codeBuffer.hpp" | |
| 27 #include "c1/c1_CodeStubs.hpp" | |
| 28 #include "c1/c1_Defs.hpp" | |
| 29 #include "c1/c1_FrameMap.hpp" | |
| 30 #include "c1/c1_LIRAssembler.hpp" | |
| 31 #include "c1/c1_MacroAssembler.hpp" | |
| 32 #include "c1/c1_Runtime1.hpp" | |
| 33 #include "classfile/systemDictionary.hpp" | |
| 34 #include "classfile/vmSymbols.hpp" | |
| 35 #include "code/codeBlob.hpp" | |
| 36 #include "code/compiledIC.hpp" | |
| 37 #include "code/pcDesc.hpp" | |
| 38 #include "code/scopeDesc.hpp" | |
| 39 #include "code/vtableStubs.hpp" | |
| 40 #include "compiler/disassembler.hpp" | |
| 41 #include "gc_interface/collectedHeap.hpp" | |
| 42 #include "interpreter/bytecode.hpp" | |
| 43 #include "interpreter/interpreter.hpp" | |
| 44 #include "memory/allocation.inline.hpp" | |
| 45 #include "memory/barrierSet.hpp" | |
| 46 #include "memory/oopFactory.hpp" | |
| 47 #include "memory/resourceArea.hpp" | |
| 48 #include "oops/objArrayKlass.hpp" | |
| 49 #include "oops/oop.inline.hpp" | |
| 50 #include "runtime/biasedLocking.hpp" | |
| 51 #include "runtime/compilationPolicy.hpp" | |
| 52 #include "runtime/interfaceSupport.hpp" | |
| 53 #include "runtime/javaCalls.hpp" | |
| 54 #include "runtime/sharedRuntime.hpp" | |
| 55 #include "runtime/threadCritical.hpp" | |
| 56 #include "runtime/vframe.hpp" | |
| 57 #include "runtime/vframeArray.hpp" | |
| 58 #include "utilities/copy.hpp" | |
| 59 #include "utilities/events.hpp" | |
| 0 | 60 |
| 61 | |
| 62 // Implementation of StubAssembler | |
| 63 | |
| 64 StubAssembler::StubAssembler(CodeBuffer* code, const char * name, int stub_id) : C1_MacroAssembler(code) { | |
| 65 _name = name; | |
| 66 _must_gc_arguments = false; | |
| 67 _frame_size = no_frame_size; | |
| 68 _num_rt_args = 0; | |
| 69 _stub_id = stub_id; | |
| 70 } | |
| 71 | |
| 72 | |
| 73 void StubAssembler::set_info(const char* name, bool must_gc_arguments) { | |
| 74 _name = name; | |
| 75 _must_gc_arguments = must_gc_arguments; | |
| 76 } | |
| 77 | |
| 78 | |
| 79 void StubAssembler::set_frame_size(int size) { | |
| 80 if (_frame_size == no_frame_size) { | |
| 81 _frame_size = size; | |
| 82 } | |
| 83 assert(_frame_size == size, "can't change the frame size"); | |
| 84 } | |
| 85 | |
| 86 | |
| 87 void StubAssembler::set_num_rt_args(int args) { | |
| 88 if (_num_rt_args == 0) { | |
| 89 _num_rt_args = args; | |
| 90 } | |
| 91 assert(_num_rt_args == args, "can't change the number of args"); | |
| 92 } | |
| 93 | |
| 94 // Implementation of Runtime1 | |
| 95 | |
| 96 CodeBlob* Runtime1::_blobs[Runtime1::number_of_ids]; | |
| 97 const char *Runtime1::_blob_names[] = { | |
| 98 RUNTIME1_STUBS(STUB_NAME, LAST_STUB_NAME) | |
| 99 }; | |
| 100 | |
| 101 #ifndef PRODUCT | |
| 102 // statistics | |
| 103 int Runtime1::_generic_arraycopy_cnt = 0; | |
| 104 int Runtime1::_primitive_arraycopy_cnt = 0; | |
| 105 int Runtime1::_oop_arraycopy_cnt = 0; | |
| 2446 | 106 int Runtime1::_generic_arraycopystub_cnt = 0; |
| 0 | 107 int Runtime1::_arraycopy_slowcase_cnt = 0; |
| 2446 | 108 int Runtime1::_arraycopy_checkcast_cnt = 0; |
| 109 int Runtime1::_arraycopy_checkcast_attempt_cnt = 0; | |
| 0 | 110 int Runtime1::_new_type_array_slowcase_cnt = 0; |
| 111 int Runtime1::_new_object_array_slowcase_cnt = 0; | |
| 112 int Runtime1::_new_instance_slowcase_cnt = 0; | |
| 113 int Runtime1::_new_multi_array_slowcase_cnt = 0; | |
| 114 int Runtime1::_monitorenter_slowcase_cnt = 0; | |
| 115 int Runtime1::_monitorexit_slowcase_cnt = 0; | |
| 116 int Runtime1::_patch_code_slowcase_cnt = 0; | |
| 117 int Runtime1::_throw_range_check_exception_count = 0; | |
| 118 int Runtime1::_throw_index_exception_count = 0; | |
| 119 int Runtime1::_throw_div0_exception_count = 0; | |
| 120 int Runtime1::_throw_null_pointer_exception_count = 0; | |
| 121 int Runtime1::_throw_class_cast_exception_count = 0; | |
| 122 int Runtime1::_throw_incompatible_class_change_error_count = 0; | |
| 123 int Runtime1::_throw_array_store_exception_count = 0; | |
| 124 int Runtime1::_throw_count = 0; | |
| 2446 | 125 |
| 126 static int _byte_arraycopy_cnt = 0; | |
| 127 static int _short_arraycopy_cnt = 0; | |
| 128 static int _int_arraycopy_cnt = 0; | |
| 129 static int _long_arraycopy_cnt = 0; | |
| 130 static int _oop_arraycopy_cnt = 0; | |
| 131 | |
| 132 address Runtime1::arraycopy_count_address(BasicType type) { | |
| 133 switch (type) { | |
| 134 case T_BOOLEAN: | |
| 135 case T_BYTE: return (address)&_byte_arraycopy_cnt; | |
| 136 case T_CHAR: | |
| 137 case T_SHORT: return (address)&_short_arraycopy_cnt; | |
| 138 case T_FLOAT: | |
| 139 case T_INT: return (address)&_int_arraycopy_cnt; | |
| 140 case T_DOUBLE: | |
| 141 case T_LONG: return (address)&_long_arraycopy_cnt; | |
| 142 case T_ARRAY: | |
| 143 case T_OBJECT: return (address)&_oop_arraycopy_cnt; | |
| 144 default: | |
| 145 ShouldNotReachHere(); | |
| 146 return NULL; | |
| 147 } | |
| 148 } | |
| 149 | |
| 150 | |
| 0 | 151 #endif |
| 152 | |
| 153 // Simple helper to see if the caller of a runtime stub which | |
| 154 // entered the VM has been deoptimized | |
| 155 | |
| 156 static bool caller_is_deopted() { | |
| 157 JavaThread* thread = JavaThread::current(); | |
| 158 RegisterMap reg_map(thread, false); | |
| 159 frame runtime_frame = thread->last_frame(); | |
| 160 frame caller_frame = runtime_frame.sender(®_map); | |
| 161 assert(caller_frame.is_compiled_frame(), "must be compiled"); | |
| 162 return caller_frame.is_deoptimized_frame(); | |
| 163 } | |
| 164 | |
| 165 // Stress deoptimization | |
| 166 static void deopt_caller() { | |
| 167 if ( !caller_is_deopted()) { | |
| 168 JavaThread* thread = JavaThread::current(); | |
| 169 RegisterMap reg_map(thread, false); | |
| 170 frame runtime_frame = thread->last_frame(); | |
| 171 frame caller_frame = runtime_frame.sender(®_map); | |
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172 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint); |
| 0 | 173 assert(caller_is_deopted(), "Must be deoptimized"); |
| 174 } | |
| 175 } | |
| 176 | |
| 177 | |
| 1584 | 178 void Runtime1::generate_blob_for(BufferBlob* buffer_blob, StubID id) { |
| 0 | 179 assert(0 <= id && id < number_of_ids, "illegal stub id"); |
| 180 ResourceMark rm; | |
| 181 // create code buffer for code storage | |
| 1748 | 182 CodeBuffer code(buffer_blob); |
| 0 | 183 |
| 1584 | 184 Compilation::setup_code_buffer(&code, 0); |
| 0 | 185 |
| 186 // create assembler for code generation | |
| 187 StubAssembler* sasm = new StubAssembler(&code, name_for(id), id); | |
| 188 // generate code for runtime stub | |
| 189 OopMapSet* oop_maps; | |
| 190 oop_maps = generate_code_for(id, sasm); | |
| 191 assert(oop_maps == NULL || sasm->frame_size() != no_frame_size, | |
| 192 "if stub has an oop map it must have a valid frame size"); | |
| 193 | |
| 194 #ifdef ASSERT | |
| 195 // Make sure that stubs that need oopmaps have them | |
| 196 switch (id) { | |
| 197 // These stubs don't need to have an oopmap | |
| 198 case dtrace_object_alloc_id: | |
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199 case g1_pre_barrier_slow_id: |
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200 case g1_post_barrier_slow_id: |
| 0 | 201 case slow_subtype_check_id: |
| 202 case fpu2long_stub_id: | |
| 203 case unwind_exception_id: | |
| 1783 | 204 case counter_overflow_id: |
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205 #if defined(SPARC) || defined(PPC) |
| 0 | 206 case handle_exception_nofpu_id: // Unused on sparc |
| 207 #endif | |
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208 #ifdef GRAAL |
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209 case graal_verify_oop_id: |
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210 case graal_unwind_exception_call_id: |
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211 case graal_slow_subtype_check_id: |
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212 case graal_arithmetic_frem_id: |
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213 case graal_arithmetic_drem_id: |
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214 case graal_set_deopt_info_id: |
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215 #endif |
| 0 | 216 break; |
| 217 | |
| 218 // All other stubs should have oopmaps | |
| 219 default: | |
| 220 assert(oop_maps != NULL, "must have an oopmap"); | |
| 221 } | |
| 222 #endif | |
| 223 | |
| 224 // align so printing shows nop's instead of random code at the end (SimpleStubs are aligned) | |
| 225 sasm->align(BytesPerWord); | |
| 226 // make sure all code is in code buffer | |
| 227 sasm->flush(); | |
| 228 // create blob - distinguish a few special cases | |
| 229 CodeBlob* blob = RuntimeStub::new_runtime_stub(name_for(id), | |
| 230 &code, | |
| 231 CodeOffsets::frame_never_safe, | |
| 232 sasm->frame_size(), | |
| 233 oop_maps, | |
| 234 sasm->must_gc_arguments()); | |
| 235 // install blob | |
| 236 assert(blob != NULL, "blob must exist"); | |
| 237 _blobs[id] = blob; | |
| 238 } | |
| 239 | |
| 240 | |
| 1584 | 241 void Runtime1::initialize(BufferBlob* blob) { |
| 242 // platform-dependent initialization | |
| 243 initialize_pd(); | |
| 244 // generate stubs | |
| 245 for (int id = 0; id < number_of_ids; id++) generate_blob_for(blob, (StubID)id); | |
| 246 // printing | |
| 0 | 247 #ifndef PRODUCT |
| 1584 | 248 if (PrintSimpleStubs) { |
| 249 ResourceMark rm; | |
| 250 for (int id = 0; id < number_of_ids; id++) { | |
| 251 _blobs[id]->print(); | |
| 252 if (_blobs[id]->oop_maps() != NULL) { | |
| 253 _blobs[id]->oop_maps()->print(); | |
| 0 | 254 } |
| 255 } | |
| 1584 | 256 } |
| 0 | 257 #endif |
| 258 } | |
| 259 | |
| 260 | |
| 261 CodeBlob* Runtime1::blob_for(StubID id) { | |
| 262 assert(0 <= id && id < number_of_ids, "illegal stub id"); | |
| 263 return _blobs[id]; | |
| 264 } | |
| 265 | |
| 266 | |
| 267 const char* Runtime1::name_for(StubID id) { | |
| 268 assert(0 <= id && id < number_of_ids, "illegal stub id"); | |
| 269 return _blob_names[id]; | |
| 270 } | |
| 271 | |
| 272 const char* Runtime1::name_for_address(address entry) { | |
| 273 for (int id = 0; id < number_of_ids; id++) { | |
| 274 if (entry == entry_for((StubID)id)) return name_for((StubID)id); | |
| 275 } | |
| 276 | |
| 277 #define FUNCTION_CASE(a, f) \ | |
| 278 if ((intptr_t)a == CAST_FROM_FN_PTR(intptr_t, f)) return #f | |
| 279 | |
| 280 FUNCTION_CASE(entry, os::javaTimeMillis); | |
| 281 FUNCTION_CASE(entry, os::javaTimeNanos); | |
| 282 FUNCTION_CASE(entry, SharedRuntime::OSR_migration_end); | |
| 283 FUNCTION_CASE(entry, SharedRuntime::d2f); | |
| 284 FUNCTION_CASE(entry, SharedRuntime::d2i); | |
| 285 FUNCTION_CASE(entry, SharedRuntime::d2l); | |
| 286 FUNCTION_CASE(entry, SharedRuntime::dcos); | |
| 287 FUNCTION_CASE(entry, SharedRuntime::dexp); | |
| 288 FUNCTION_CASE(entry, SharedRuntime::dlog); | |
| 289 FUNCTION_CASE(entry, SharedRuntime::dlog10); | |
| 290 FUNCTION_CASE(entry, SharedRuntime::dpow); | |
| 291 FUNCTION_CASE(entry, SharedRuntime::drem); | |
| 292 FUNCTION_CASE(entry, SharedRuntime::dsin); | |
| 293 FUNCTION_CASE(entry, SharedRuntime::dtan); | |
| 294 FUNCTION_CASE(entry, SharedRuntime::f2i); | |
| 295 FUNCTION_CASE(entry, SharedRuntime::f2l); | |
| 296 FUNCTION_CASE(entry, SharedRuntime::frem); | |
| 297 FUNCTION_CASE(entry, SharedRuntime::l2d); | |
| 298 FUNCTION_CASE(entry, SharedRuntime::l2f); | |
| 299 FUNCTION_CASE(entry, SharedRuntime::ldiv); | |
| 300 FUNCTION_CASE(entry, SharedRuntime::lmul); | |
| 301 FUNCTION_CASE(entry, SharedRuntime::lrem); | |
| 302 FUNCTION_CASE(entry, SharedRuntime::lrem); | |
| 303 FUNCTION_CASE(entry, SharedRuntime::dtrace_method_entry); | |
| 304 FUNCTION_CASE(entry, SharedRuntime::dtrace_method_exit); | |
| 6135 | 305 FUNCTION_CASE(entry, is_instance_of); |
| 0 | 306 FUNCTION_CASE(entry, trace_block_entry); |
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307 #ifdef TRACE_HAVE_INTRINSICS |
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308 FUNCTION_CASE(entry, TRACE_TIME_METHOD); |
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309 #endif |
| 0 | 310 |
| 311 #undef FUNCTION_CASE | |
| 312 | |
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313 // Soft float adds more runtime names. |
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314 return pd_name_for_address(entry); |
| 0 | 315 } |
| 316 | |
| 317 | |
| 318 JRT_ENTRY(void, Runtime1::new_instance(JavaThread* thread, klassOopDesc* klass)) | |
| 319 NOT_PRODUCT(_new_instance_slowcase_cnt++;) | |
| 320 | |
| 321 assert(oop(klass)->is_klass(), "not a class"); | |
| 322 instanceKlassHandle h(thread, klass); | |
| 323 h->check_valid_for_instantiation(true, CHECK); | |
| 324 // make sure klass is initialized | |
| 325 h->initialize(CHECK); | |
| 326 // allocate instance and return via TLS | |
| 327 oop obj = h->allocate_instance(CHECK); | |
| 328 thread->set_vm_result(obj); | |
| 329 JRT_END | |
| 330 | |
| 331 | |
| 332 JRT_ENTRY(void, Runtime1::new_type_array(JavaThread* thread, klassOopDesc* klass, jint length)) | |
| 333 NOT_PRODUCT(_new_type_array_slowcase_cnt++;) | |
| 334 // Note: no handle for klass needed since they are not used | |
| 335 // anymore after new_typeArray() and no GC can happen before. | |
| 336 // (This may have to change if this code changes!) | |
| 337 assert(oop(klass)->is_klass(), "not a class"); | |
| 338 BasicType elt_type = typeArrayKlass::cast(klass)->element_type(); | |
| 339 oop obj = oopFactory::new_typeArray(elt_type, length, CHECK); | |
| 340 thread->set_vm_result(obj); | |
| 341 // This is pretty rare but this runtime patch is stressful to deoptimization | |
| 342 // if we deoptimize here so force a deopt to stress the path. | |
| 343 if (DeoptimizeALot) { | |
| 344 deopt_caller(); | |
| 345 } | |
| 346 | |
| 347 JRT_END | |
| 348 | |
| 349 | |
| 350 JRT_ENTRY(void, Runtime1::new_object_array(JavaThread* thread, klassOopDesc* array_klass, jint length)) | |
| 351 NOT_PRODUCT(_new_object_array_slowcase_cnt++;) | |
| 352 | |
| 353 // Note: no handle for klass needed since they are not used | |
| 354 // anymore after new_objArray() and no GC can happen before. | |
| 355 // (This may have to change if this code changes!) | |
| 356 assert(oop(array_klass)->is_klass(), "not a class"); | |
| 357 klassOop elem_klass = objArrayKlass::cast(array_klass)->element_klass(); | |
| 358 objArrayOop obj = oopFactory::new_objArray(elem_klass, length, CHECK); | |
| 359 thread->set_vm_result(obj); | |
| 360 // This is pretty rare but this runtime patch is stressful to deoptimization | |
| 361 // if we deoptimize here so force a deopt to stress the path. | |
| 362 if (DeoptimizeALot) { | |
| 363 deopt_caller(); | |
| 364 } | |
| 365 JRT_END | |
| 366 | |
| 367 | |
| 368 JRT_ENTRY(void, Runtime1::new_multi_array(JavaThread* thread, klassOopDesc* klass, int rank, jint* dims)) | |
| 369 NOT_PRODUCT(_new_multi_array_slowcase_cnt++;) | |
| 370 | |
| 371 assert(oop(klass)->is_klass(), "not a class"); | |
| 372 assert(rank >= 1, "rank must be nonzero"); | |
| 373 oop obj = arrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK); | |
| 374 thread->set_vm_result(obj); | |
| 375 JRT_END | |
| 376 | |
| 377 | |
| 378 JRT_ENTRY(void, Runtime1::unimplemented_entry(JavaThread* thread, StubID id)) | |
| 379 tty->print_cr("Runtime1::entry_for(%d) returned unimplemented entry point", id); | |
| 380 JRT_END | |
| 381 | |
| 382 | |
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383 JRT_ENTRY(void, Runtime1::throw_array_store_exception(JavaThread* thread, oopDesc* obj)) |
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384 ResourceMark rm(thread); |
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385 const char* klass_name = Klass::cast(obj->klass())->external_name(); |
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386 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArrayStoreException(), klass_name); |
| 0 | 387 JRT_END |
| 388 | |
| 389 | |
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390 // counter_overflow() is called from within C1-compiled methods. The enclosing method is the method |
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391 // associated with the top activation record. The inlinee (that is possibly included in the enclosing |
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392 // method) method oop is passed as an argument. In order to do that it is embedded in the code as |
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393 // a constant. |
| 1783 | 394 static nmethod* counter_overflow_helper(JavaThread* THREAD, int branch_bci, methodOopDesc* m) { |
| 395 nmethod* osr_nm = NULL; | |
| 396 methodHandle method(THREAD, m); | |
| 397 | |
| 398 RegisterMap map(THREAD, false); | |
| 399 frame fr = THREAD->last_frame().sender(&map); | |
| 0 | 400 nmethod* nm = (nmethod*) fr.cb(); |
| 1783 | 401 assert(nm!= NULL && nm->is_nmethod(), "Sanity check"); |
| 402 methodHandle enclosing_method(THREAD, nm->method()); | |
| 403 | |
| 404 CompLevel level = (CompLevel)nm->comp_level(); | |
| 405 int bci = InvocationEntryBci; | |
| 406 if (branch_bci != InvocationEntryBci) { | |
| 407 // Compute desination bci | |
| 408 address pc = method()->code_base() + branch_bci; | |
| 2142 | 409 Bytecodes::Code branch = Bytecodes::code_at(method(), pc); |
| 1783 | 410 int offset = 0; |
| 411 switch (branch) { | |
| 412 case Bytecodes::_if_icmplt: case Bytecodes::_iflt: | |
| 413 case Bytecodes::_if_icmpgt: case Bytecodes::_ifgt: | |
| 414 case Bytecodes::_if_icmple: case Bytecodes::_ifle: | |
| 415 case Bytecodes::_if_icmpge: case Bytecodes::_ifge: | |
| 416 case Bytecodes::_if_icmpeq: case Bytecodes::_if_acmpeq: case Bytecodes::_ifeq: | |
| 417 case Bytecodes::_if_icmpne: case Bytecodes::_if_acmpne: case Bytecodes::_ifne: | |
| 418 case Bytecodes::_ifnull: case Bytecodes::_ifnonnull: case Bytecodes::_goto: | |
| 419 offset = (int16_t)Bytes::get_Java_u2(pc + 1); | |
| 420 break; | |
| 421 case Bytecodes::_goto_w: | |
| 422 offset = Bytes::get_Java_u4(pc + 1); | |
| 423 break; | |
| 424 default: ; | |
| 0 | 425 } |
| 1783 | 426 bci = branch_bci + offset; |
| 427 } | |
|
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428 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); |
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429 osr_nm = CompilationPolicy::policy()->event(enclosing_method, method, branch_bci, bci, level, nm, THREAD); |
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430 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); |
| 1783 | 431 return osr_nm; |
| 432 } | |
| 433 | |
| 434 JRT_BLOCK_ENTRY(address, Runtime1::counter_overflow(JavaThread* thread, int bci, methodOopDesc* method)) | |
| 435 nmethod* osr_nm; | |
| 436 JRT_BLOCK | |
| 437 osr_nm = counter_overflow_helper(thread, bci, method); | |
| 438 if (osr_nm != NULL) { | |
| 439 RegisterMap map(thread, false); | |
| 440 frame fr = thread->last_frame().sender(&map); | |
|
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441 Deoptimization::deoptimize_frame(thread, fr.id(), Deoptimization::Reason_constraint); |
| 0 | 442 } |
| 1783 | 443 JRT_BLOCK_END |
| 444 return NULL; | |
| 0 | 445 JRT_END |
| 446 | |
| 447 extern void vm_exit(int code); | |
| 448 | |
| 449 // Enter this method from compiled code handler below. This is where we transition | |
| 450 // to VM mode. This is done as a helper routine so that the method called directly | |
| 451 // from compiled code does not have to transition to VM. This allows the entry | |
| 452 // method to see if the nmethod that we have just looked up a handler for has | |
| 453 // been deoptimized while we were in the vm. This simplifies the assembly code | |
| 454 // cpu directories. | |
| 455 // | |
| 456 // We are entering here from exception stub (via the entry method below) | |
| 457 // If there is a compiled exception handler in this method, we will continue there; | |
| 458 // otherwise we will unwind the stack and continue at the caller of top frame method | |
| 459 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to | |
| 460 // control the area where we can allow a safepoint. After we exit the safepoint area we can | |
| 461 // check to see if the handler we are going to return is now in a nmethod that has | |
| 462 // been deoptimized. If that is the case we return the deopt blob | |
| 463 // unpack_with_exception entry instead. This makes life for the exception blob easier | |
| 464 // because making that same check and diverting is painful from assembly language. | |
| 465 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, nmethod*& nm)) | |
|
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466 // Reset method handle flag. |
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467 thread->set_is_method_handle_return(false); |
| 0 | 468 |
| 469 Handle exception(thread, ex); | |
| 470 nm = CodeCache::find_nmethod(pc); | |
| 471 assert(nm != NULL, "this is not an nmethod"); | |
| 472 // Adjust the pc as needed/ | |
| 473 if (nm->is_deopt_pc(pc)) { | |
| 474 RegisterMap map(thread, false); | |
| 475 frame exception_frame = thread->last_frame().sender(&map); | |
| 476 // if the frame isn't deopted then pc must not correspond to the caller of last_frame | |
| 477 assert(exception_frame.is_deoptimized_frame(), "must be deopted"); | |
| 478 pc = exception_frame.pc(); | |
| 479 } | |
| 480 #ifdef ASSERT | |
| 481 assert(exception.not_null(), "NULL exceptions should be handled by throw_exception"); | |
| 482 assert(exception->is_oop(), "just checking"); | |
| 483 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError | |
| 1142 | 484 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) { |
| 0 | 485 if (ExitVMOnVerifyError) vm_exit(-1); |
| 486 ShouldNotReachHere(); | |
| 487 } | |
| 488 #endif | |
| 489 | |
| 490 // Check the stack guard pages and reenable them if necessary and there is | |
| 491 // enough space on the stack to do so. Use fast exceptions only if the guard | |
| 492 // pages are enabled. | |
| 493 bool guard_pages_enabled = thread->stack_yellow_zone_enabled(); | |
| 494 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack(); | |
| 495 | |
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496 if (JvmtiExport::can_post_on_exceptions()) { |
| 0 | 497 // To ensure correct notification of exception catches and throws |
| 498 // we have to deoptimize here. If we attempted to notify the | |
| 499 // catches and throws during this exception lookup it's possible | |
| 500 // we could deoptimize on the way out of the VM and end back in | |
| 501 // the interpreter at the throw site. This would result in double | |
| 502 // notifications since the interpreter would also notify about | |
| 503 // these same catches and throws as it unwound the frame. | |
| 504 | |
| 505 RegisterMap reg_map(thread); | |
| 506 frame stub_frame = thread->last_frame(); | |
| 507 frame caller_frame = stub_frame.sender(®_map); | |
| 508 | |
| 509 // We don't really want to deoptimize the nmethod itself since we | |
| 510 // can actually continue in the exception handler ourselves but I | |
| 511 // don't see an easy way to have the desired effect. | |
|
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512 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint); |
|
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513 assert(caller_is_deopted(), "Must be deoptimized"); |
| 0 | 514 |
| 515 return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls(); | |
| 516 } | |
| 517 | |
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518 // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions |
| 0 | 519 if (guard_pages_enabled) { |
| 520 address fast_continuation = nm->handler_for_exception_and_pc(exception, pc); | |
| 521 if (fast_continuation != NULL) { | |
|
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522 // Set flag if return address is a method handle call site. |
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523 thread->set_is_method_handle_return(nm->is_method_handle_return(pc)); |
| 0 | 524 return fast_continuation; |
| 525 } | |
| 526 } | |
| 527 | |
| 528 // If the stack guard pages are enabled, check whether there is a handler in | |
| 529 // the current method. Otherwise (guard pages disabled), force an unwind and | |
| 530 // skip the exception cache update (i.e., just leave continuation==NULL). | |
| 531 address continuation = NULL; | |
| 532 if (guard_pages_enabled) { | |
| 533 | |
| 534 // New exception handling mechanism can support inlined methods | |
| 535 // with exception handlers since the mappings are from PC to PC | |
| 536 | |
| 537 // debugging support | |
| 538 // tracing | |
| 539 if (TraceExceptions) { | |
| 540 ttyLocker ttyl; | |
| 541 ResourceMark rm; | |
|
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542 int offset = pc - nm->code_begin(); |
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543 tty->print_cr("Exception <%s> (0x%x) thrown in compiled method <%s> at PC " PTR_FORMAT " [" PTR_FORMAT "+%d] for thread 0x%x", |
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544 exception->print_value_string(), (address)exception(), nm->method()->print_value_string(), pc, nm->code_begin(), offset, thread); |
| 0 | 545 } |
| 546 // for AbortVMOnException flag | |
| 547 NOT_PRODUCT(Exceptions::debug_check_abort(exception)); | |
| 548 | |
| 549 // Clear out the exception oop and pc since looking up an | |
| 550 // exception handler can cause class loading, which might throw an | |
| 551 // exception and those fields are expected to be clear during | |
| 552 // normal bytecode execution. | |
| 553 thread->set_exception_oop(NULL); | |
| 554 thread->set_exception_pc(NULL); | |
| 555 | |
| 556 continuation = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, false, false); | |
| 557 // If an exception was thrown during exception dispatch, the exception oop may have changed | |
| 558 thread->set_exception_oop(exception()); | |
| 559 thread->set_exception_pc(pc); | |
| 560 | |
| 561 // the exception cache is used only by non-implicit exceptions | |
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562 if (continuation != NULL && !SharedRuntime::deopt_blob()->contains(continuation)) { |
| 0 | 563 nm->add_handler_for_exception_and_pc(exception, pc, continuation); |
| 564 } | |
| 565 } | |
| 566 | |
| 567 thread->set_vm_result(exception()); | |
|
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568 // Set flag if return address is a method handle call site. |
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569 thread->set_is_method_handle_return(nm->is_method_handle_return(pc)); |
| 0 | 570 |
| 571 if (TraceExceptions) { | |
| 572 ttyLocker ttyl; | |
| 573 ResourceMark rm; | |
| 574 tty->print_cr("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT " for exception thrown at PC " PTR_FORMAT, | |
| 575 thread, continuation, pc); | |
| 576 } | |
| 577 | |
| 578 return continuation; | |
| 579 JRT_END | |
| 580 | |
| 581 // Enter this method from compiled code only if there is a Java exception handler | |
|
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582 // in the method handling the exception. |
| 0 | 583 // We are entering here from exception stub. We don't do a normal VM transition here. |
| 584 // We do it in a helper. This is so we can check to see if the nmethod we have just | |
| 585 // searched for an exception handler has been deoptimized in the meantime. | |
|
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586 address Runtime1::exception_handler_for_pc(JavaThread* thread) { |
| 0 | 587 oop exception = thread->exception_oop(); |
| 588 address pc = thread->exception_pc(); | |
| 589 // Still in Java mode | |
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590 DEBUG_ONLY(ResetNoHandleMark rnhm); |
| 0 | 591 nmethod* nm = NULL; |
| 592 address continuation = NULL; | |
| 593 { | |
| 594 // Enter VM mode by calling the helper | |
| 595 ResetNoHandleMark rnhm; | |
| 596 continuation = exception_handler_for_pc_helper(thread, exception, pc, nm); | |
| 597 } | |
| 598 // Back in JAVA, use no oops DON'T safepoint | |
| 599 | |
| 600 // Now check to see if the nmethod we were called from is now deoptimized. | |
| 601 // If so we must return to the deopt blob and deoptimize the nmethod | |
| 602 if (nm != NULL && caller_is_deopted()) { | |
| 603 continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls(); | |
| 604 } | |
| 605 | |
|
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606 assert(continuation != NULL, "no handler found"); |
| 0 | 607 return continuation; |
| 608 } | |
| 609 | |
| 610 | |
| 611 JRT_ENTRY(void, Runtime1::throw_range_check_exception(JavaThread* thread, int index)) | |
| 612 NOT_PRODUCT(_throw_range_check_exception_count++;) | |
| 613 char message[jintAsStringSize]; | |
| 614 sprintf(message, "%d", index); | |
| 615 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), message); | |
| 616 JRT_END | |
| 617 | |
| 618 | |
| 619 JRT_ENTRY(void, Runtime1::throw_index_exception(JavaThread* thread, int index)) | |
| 620 NOT_PRODUCT(_throw_index_exception_count++;) | |
| 621 char message[16]; | |
| 622 sprintf(message, "%d", index); | |
| 623 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IndexOutOfBoundsException(), message); | |
| 624 JRT_END | |
| 625 | |
| 626 | |
| 627 JRT_ENTRY(void, Runtime1::throw_div0_exception(JavaThread* thread)) | |
| 628 NOT_PRODUCT(_throw_div0_exception_count++;) | |
| 629 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArithmeticException(), "/ by zero"); | |
| 630 JRT_END | |
| 631 | |
| 632 | |
| 633 JRT_ENTRY(void, Runtime1::throw_null_pointer_exception(JavaThread* thread)) | |
| 634 NOT_PRODUCT(_throw_null_pointer_exception_count++;) | |
| 635 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
| 636 JRT_END | |
| 637 | |
| 638 | |
| 639 JRT_ENTRY(void, Runtime1::throw_class_cast_exception(JavaThread* thread, oopDesc* object)) | |
| 640 NOT_PRODUCT(_throw_class_cast_exception_count++;) | |
| 641 ResourceMark rm(thread); | |
| 642 char* message = SharedRuntime::generate_class_cast_message( | |
| 643 thread, Klass::cast(object->klass())->external_name()); | |
| 644 SharedRuntime::throw_and_post_jvmti_exception( | |
| 645 thread, vmSymbols::java_lang_ClassCastException(), message); | |
| 646 JRT_END | |
| 647 | |
| 648 | |
| 649 JRT_ENTRY(void, Runtime1::throw_incompatible_class_change_error(JavaThread* thread)) | |
| 650 NOT_PRODUCT(_throw_incompatible_class_change_error_count++;) | |
| 651 ResourceMark rm(thread); | |
| 652 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IncompatibleClassChangeError()); | |
| 653 JRT_END | |
| 654 | |
|
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First round of minimizing diff vs OpenJDK.
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655 #ifdef GRAAL |
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656 |
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657 JRT_ENTRY(void, Runtime1::graal_create_null_exception(JavaThread* thread)) |
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658 thread->set_vm_result(Exceptions::new_exception(thread, vmSymbols::java_lang_NullPointerException(), NULL)()); |
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659 JRT_END |
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660 |
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661 JRT_ENTRY(void, Runtime1::graal_create_out_of_bounds_exception(JavaThread* thread, jint index)) |
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662 char message[jintAsStringSize]; |
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663 sprintf(message, "%d", index); |
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664 thread->set_vm_result(Exceptions::new_exception(thread, vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), message)()); |
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665 JRT_END |
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666 |
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667 JRT_ENTRY(void, Runtime1::graal_generic_callback(JavaThread* thread, oop _callback, oop _argument)) |
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668 HandleMark hm; |
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669 Handle callback(_callback); |
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670 Handle argument(_argument); |
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671 |
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672 KlassHandle klass = SystemDictionary::resolve_or_null(vmSymbols::com_oracle_graal_api_code_GenericCallback(), SystemDictionary::java_system_loader(), NULL, thread); |
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673 if (klass.is_null()) { |
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674 tty->print_cr("couldn't resolve com_oracle_graal_api_code_GenericCallback"); |
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675 } |
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676 |
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677 JavaValue result(T_OBJECT); |
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678 JavaCallArguments args; |
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679 args.push_oop(Handle(callback)); |
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680 args.push_oop(Handle(argument)); |
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681 JavaCalls::call_virtual(&result, klass, vmSymbols::callbackInternal_name(), vmSymbols::callback_signature(), &args, thread); |
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682 |
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|
683 thread->set_vm_result((oop) result.get_jobject()); |
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684 JRT_END |
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685 |
|
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686 JRT_ENTRY_NO_ASYNC(void, Runtime1::graal_monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock)) |
| 0 | 687 NOT_PRODUCT(_monitorenter_slowcase_cnt++;) |
|
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688 #ifdef ASSERT |
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689 if (TraceGraal >= 3) { |
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690 tty->print_cr("entered locking slow case with obj=" INTPTR_FORMAT " and lock= " INTPTR_FORMAT, obj, lock); |
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691 } |
| 0 | 692 if (PrintBiasedLockingStatistics) { |
| 693 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
| 694 } | |
|
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695 #endif |
| 0 | 696 Handle h_obj(thread, obj); |
| 697 assert(h_obj()->is_oop(), "must be NULL or an object"); | |
| 698 if (UseBiasedLocking) { | |
| 699 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
|
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700 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK); |
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701 } else { |
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702 if (UseFastLocking) { |
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703 // When using fast locking, the compiled code has already tried the fast case |
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704 ObjectSynchronizer::slow_enter(h_obj, lock, THREAD); |
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705 } else { |
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706 ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD); |
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707 } |
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708 } |
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709 #ifdef ASSERT |
|
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710 if (TraceGraal >= 3) { |
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711 tty->print_cr("exiting locking"); |
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712 tty->print_cr(""); |
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713 tty->print_cr("done"); |
|
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714 } |
|
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715 #endif |
|
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716 JRT_END |
|
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717 |
|
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|
718 |
|
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719 JRT_LEAF(void, Runtime1::graal_monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock)) |
|
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720 NOT_PRODUCT(_monitorexit_slowcase_cnt++;) |
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721 assert(thread == JavaThread::current(), "threads must correspond"); |
|
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722 assert(thread->last_Java_sp(), "last_Java_sp must be set"); |
|
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723 // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown |
|
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724 EXCEPTION_MARK; |
|
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|
725 |
|
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|
726 #ifdef DEBUG |
|
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|
727 if (!obj->is_oop()) { |
|
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|
728 ResetNoHandleMark rhm; |
|
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729 nmethod* method = thread->last_frame().cb()->as_nmethod_or_null(); |
|
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730 if (method != NULL) { |
|
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731 tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), obj); |
|
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|
732 } |
|
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|
733 thread->print_stack_on(tty); |
|
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|
734 assert(false, "invalid lock object pointer dected"); |
|
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Change Graal monitor enter and exit from BasicObjectLock to BasicLock
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|
735 } |
|
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Change Graal monitor enter and exit from BasicObjectLock to BasicLock
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|
736 #endif |
|
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|
737 |
|
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Change Graal monitor enter and exit from BasicObjectLock to BasicLock
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|
738 if (UseFastLocking) { |
|
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739 // When using fast locking, the compiled code has already tried the fast case |
|
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740 ObjectSynchronizer::slow_exit(obj, lock, THREAD); |
|
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Change Graal monitor enter and exit from BasicObjectLock to BasicLock
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|
741 } else { |
|
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|
742 ObjectSynchronizer::fast_exit(obj, lock, THREAD); |
|
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743 } |
|
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Change Graal monitor enter and exit from BasicObjectLock to BasicLock
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|
744 JRT_END |
|
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|
745 |
|
5580
69358a2182a3
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changeset
|
746 JRT_ENTRY(void, Runtime1::graal_log_object(JavaThread* thread, oop obj, jboolean newline, jboolean string)) |
|
69358a2182a3
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|
747 if (!string) { |
|
69358a2182a3
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changeset
|
748 tty->print("%p", obj); |
|
69358a2182a3
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|
749 } else { |
|
69358a2182a3
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|
750 assert(obj != NULL && java_lang_String::is_instance(obj), "must be"); |
|
69358a2182a3
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|
751 |
|
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5573
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changeset
|
752 typeArrayOop value = java_lang_String::value(obj); |
|
69358a2182a3
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|
753 int offset = java_lang_String::offset(obj); |
|
69358a2182a3
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changeset
|
754 int length = java_lang_String::length(obj); |
|
69358a2182a3
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|
755 |
|
69358a2182a3
added printf-like facility (Log.java) for logging debug output in snippets
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|
756 if (length != 0) { |
|
5595
ea9ac81f5645
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changeset
|
757 int printLength = MIN2(length, 1024); |
|
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|
758 if (value == NULL) { |
|
69358a2182a3
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|
759 // This can happen if, e.g., printing a String |
|
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|
760 // object before its initializer has been called |
|
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|
761 tty->print("null"); |
|
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|
762 } else if (printLength < 256 - 1) { |
|
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|
763 // Use an intermediate buffer to try and prevent interlacing of multi-threaded output |
|
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|
764 char buf[256]; |
|
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|
765 for (int index = 0; index < printLength; index++) { |
|
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changeset
|
766 buf[index] = value->char_at(index + offset); |
|
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|
767 } |
|
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|
768 buf[printLength] = 0; |
|
5580
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|
769 tty->print("%s", buf); |
|
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|
770 if (printLength < length) { |
|
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|
771 tty->print("... (%d more)", length - printLength); |
|
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|
772 } |
|
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|
773 } else { |
|
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|
774 for (int index = 0; index < printLength; index++) { |
|
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|
775 tty->print("%c", value->char_at(index + offset)); |
|
69358a2182a3
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|
776 } |
|
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|
777 if (printLength < length) { |
|
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|
778 tty->print("... (%d more)", length - printLength); |
|
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limit log output to handle case where String object is invalid
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|
779 } |
|
5580
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|
780 } |
|
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|
781 } |
|
69358a2182a3
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|
782 } |
|
69358a2182a3
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changeset
|
783 if (newline) { |
|
69358a2182a3
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|
784 tty->cr(); |
|
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changeset
|
785 } |
|
69358a2182a3
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|
786 JRT_END |
|
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|
787 |
|
69358a2182a3
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|
788 JRT_ENTRY(void, Runtime1::graal_log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline)) |
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789 union { |
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790 jlong l; |
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791 jdouble d; |
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792 jfloat f; |
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793 } uu; |
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794 uu.l = value; |
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795 switch (typeChar) { |
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796 case 'z': tty->print(value == 0 ? "false" : "true"); break; |
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797 case 'b': tty->print("%d", (jbyte) value); break; |
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798 case 'c': tty->print("%c", (jchar) value); break; |
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799 case 's': tty->print("%d", (jshort) value); break; |
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800 case 'i': tty->print("%d", (jint) value); break; |
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801 case 'f': tty->print("%f", uu.f); break; |
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802 case 'j': tty->print(INT64_FORMAT, value); break; |
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803 case 'd': tty->print("%lf", uu.d); break; |
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804 default: assert(false, "unknown typeChar"); break; |
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805 } |
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806 if (newline) { |
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807 tty->cr(); |
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808 } |
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809 JRT_END |
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810 |
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811 #endif /* GRAAL */ |
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812 |
| 0 | 813 |
| 814 JRT_ENTRY_NO_ASYNC(void, Runtime1::monitorenter(JavaThread* thread, oopDesc* obj, BasicObjectLock* lock)) | |
| 815 NOT_PRODUCT(_monitorenter_slowcase_cnt++;) | |
| 816 if (PrintBiasedLockingStatistics) { | |
| 817 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
| 818 } | |
| 819 Handle h_obj(thread, obj); | |
| 820 assert(h_obj()->is_oop(), "must be NULL or an object"); | |
| 821 if (UseBiasedLocking) { | |
| 822 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
| 823 ObjectSynchronizer::fast_enter(h_obj, lock->lock(), true, CHECK); | |
| 824 } else { | |
| 825 if (UseFastLocking) { | |
| 826 // When using fast locking, the compiled code has already tried the fast case | |
| 827 assert(obj == lock->obj(), "must match"); | |
| 828 ObjectSynchronizer::slow_enter(h_obj, lock->lock(), THREAD); | |
| 829 } else { | |
| 830 lock->set_obj(obj); | |
| 831 ObjectSynchronizer::fast_enter(h_obj, lock->lock(), false, THREAD); | |
| 832 } | |
| 833 } | |
| 834 JRT_END | |
| 835 | |
| 836 | |
| 837 JRT_LEAF(void, Runtime1::monitorexit(JavaThread* thread, BasicObjectLock* lock)) | |
| 838 NOT_PRODUCT(_monitorexit_slowcase_cnt++;) | |
| 839 assert(thread == JavaThread::current(), "threads must correspond"); | |
| 840 assert(thread->last_Java_sp(), "last_Java_sp must be set"); | |
| 841 // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown | |
| 842 EXCEPTION_MARK; | |
| 843 | |
| 844 oop obj = lock->obj(); | |
| 845 assert(obj->is_oop(), "must be NULL or an object"); | |
| 846 if (UseFastLocking) { | |
| 847 // When using fast locking, the compiled code has already tried the fast case | |
| 848 ObjectSynchronizer::slow_exit(obj, lock->lock(), THREAD); | |
| 849 } else { | |
| 850 ObjectSynchronizer::fast_exit(obj, lock->lock(), THREAD); | |
| 851 } | |
| 852 JRT_END | |
| 853 | |
|
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854 // Cf. OptoRuntime::deoptimize_caller_frame |
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855 JRT_ENTRY(void, Runtime1::deoptimize(JavaThread* thread)) |
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856 // Called from within the owner thread, so no need for safepoint |
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857 RegisterMap reg_map(thread, false); |
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858 frame stub_frame = thread->last_frame(); |
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859 assert(stub_frame.is_runtime_frame(), "sanity check"); |
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860 frame caller_frame = stub_frame.sender(®_map); |
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861 |
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862 // We are coming from a compiled method; check this is true. |
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863 assert(CodeCache::find_nmethod(caller_frame.pc()) != NULL, "sanity"); |
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864 |
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865 // Deoptimize the caller frame. |
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866 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint); |
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867 |
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868 // Return to the now deoptimized frame. |
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869 JRT_END |
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870 |
| 0 | 871 |
| 872 static klassOop resolve_field_return_klass(methodHandle caller, int bci, TRAPS) { | |
| 2142 | 873 Bytecode_field field_access(caller, bci); |
| 0 | 874 // This can be static or non-static field access |
| 2142 | 875 Bytecodes::Code code = field_access.code(); |
| 0 | 876 |
| 877 // We must load class, initialize class and resolvethe field | |
| 878 FieldAccessInfo result; // initialize class if needed | |
| 879 constantPoolHandle constants(THREAD, caller->constants()); | |
| 2142 | 880 LinkResolver::resolve_field(result, constants, field_access.index(), Bytecodes::java_code(code), false, CHECK_NULL); |
| 0 | 881 return result.klass()(); |
| 882 } | |
| 883 | |
| 884 | |
| 885 // | |
| 886 // This routine patches sites where a class wasn't loaded or | |
| 887 // initialized at the time the code was generated. It handles | |
| 888 // references to classes, fields and forcing of initialization. Most | |
| 889 // of the cases are straightforward and involving simply forcing | |
| 890 // resolution of a class, rewriting the instruction stream with the | |
| 891 // needed constant and replacing the call in this function with the | |
| 892 // patched code. The case for static field is more complicated since | |
| 893 // the thread which is in the process of initializing a class can | |
| 894 // access it's static fields but other threads can't so the code | |
| 895 // either has to deoptimize when this case is detected or execute a | |
| 896 // check that the current thread is the initializing thread. The | |
| 897 // current | |
| 898 // | |
| 899 // Patches basically look like this: | |
| 900 // | |
| 901 // | |
| 902 // patch_site: jmp patch stub ;; will be patched | |
| 903 // continue: ... | |
| 904 // ... | |
| 905 // ... | |
| 906 // ... | |
| 907 // | |
| 908 // They have a stub which looks like this: | |
| 909 // | |
| 910 // ;; patch body | |
| 911 // movl <const>, reg (for class constants) | |
| 912 // <or> movl [reg1 + <const>], reg (for field offsets) | |
| 913 // <or> movl reg, [reg1 + <const>] (for field offsets) | |
| 914 // <being_init offset> <bytes to copy> <bytes to skip> | |
| 915 // patch_stub: call Runtime1::patch_code (through a runtime stub) | |
| 916 // jmp patch_site | |
| 917 // | |
| 918 // | |
| 919 // A normal patch is done by rewriting the patch body, usually a move, | |
| 920 // and then copying it into place over top of the jmp instruction | |
| 921 // being careful to flush caches and doing it in an MP-safe way. The | |
| 922 // constants following the patch body are used to find various pieces | |
| 923 // of the patch relative to the call site for Runtime1::patch_code. | |
| 924 // The case for getstatic and putstatic is more complicated because | |
| 925 // getstatic and putstatic have special semantics when executing while | |
| 926 // the class is being initialized. getstatic/putstatic on a class | |
| 927 // which is being_initialized may be executed by the initializing | |
| 928 // thread but other threads have to block when they execute it. This | |
| 929 // is accomplished in compiled code by executing a test of the current | |
| 930 // thread against the initializing thread of the class. It's emitted | |
| 931 // as boilerplate in their stub which allows the patched code to be | |
| 932 // executed before it's copied back into the main body of the nmethod. | |
| 933 // | |
| 934 // being_init: get_thread(<tmp reg> | |
| 935 // cmpl [reg1 + <init_thread_offset>], <tmp reg> | |
| 936 // jne patch_stub | |
| 937 // movl [reg1 + <const>], reg (for field offsets) <or> | |
| 938 // movl reg, [reg1 + <const>] (for field offsets) | |
| 939 // jmp continue | |
| 940 // <being_init offset> <bytes to copy> <bytes to skip> | |
| 941 // patch_stub: jmp Runtim1::patch_code (through a runtime stub) | |
| 942 // jmp patch_site | |
| 943 // | |
| 944 // If the class is being initialized the patch body is rewritten and | |
| 945 // the patch site is rewritten to jump to being_init, instead of | |
| 946 // patch_stub. Whenever this code is executed it checks the current | |
| 947 // thread against the intializing thread so other threads will enter | |
| 948 // the runtime and end up blocked waiting the class to finish | |
| 949 // initializing inside the calls to resolve_field below. The | |
| 950 // initializing class will continue on it's way. Once the class is | |
| 951 // fully_initialized, the intializing_thread of the class becomes | |
| 952 // NULL, so the next thread to execute this code will fail the test, | |
| 953 // call into patch_code and complete the patching process by copying | |
| 954 // the patch body back into the main part of the nmethod and resume | |
| 955 // executing. | |
| 956 // | |
| 957 // | |
| 958 | |
| 959 JRT_ENTRY(void, Runtime1::patch_code(JavaThread* thread, Runtime1::StubID stub_id )) | |
| 960 NOT_PRODUCT(_patch_code_slowcase_cnt++;) | |
| 961 | |
| 962 ResourceMark rm(thread); | |
| 963 RegisterMap reg_map(thread, false); | |
| 964 frame runtime_frame = thread->last_frame(); | |
| 965 frame caller_frame = runtime_frame.sender(®_map); | |
| 966 | |
| 967 // last java frame on stack | |
| 968 vframeStream vfst(thread, true); | |
| 969 assert(!vfst.at_end(), "Java frame must exist"); | |
| 970 | |
| 971 methodHandle caller_method(THREAD, vfst.method()); | |
| 972 // Note that caller_method->code() may not be same as caller_code because of OSR's | |
| 973 // Note also that in the presence of inlining it is not guaranteed | |
| 974 // that caller_method() == caller_code->method() | |
| 975 | |
| 976 int bci = vfst.bci(); | |
| 2142 | 977 Bytecodes::Code code = caller_method()->java_code_at(bci); |
| 0 | 978 |
| 979 #ifndef PRODUCT | |
| 980 // this is used by assertions in the access_field_patching_id | |
| 981 BasicType patch_field_type = T_ILLEGAL; | |
| 982 #endif // PRODUCT | |
| 983 bool deoptimize_for_volatile = false; | |
| 984 int patch_field_offset = -1; | |
| 985 KlassHandle init_klass(THREAD, klassOop(NULL)); // klass needed by access_field_patching code | |
| 986 Handle load_klass(THREAD, NULL); // oop needed by load_klass_patching code | |
| 987 if (stub_id == Runtime1::access_field_patching_id) { | |
| 988 | |
| 2142 | 989 Bytecode_field field_access(caller_method, bci); |
| 0 | 990 FieldAccessInfo result; // initialize class if needed |
| 2142 | 991 Bytecodes::Code code = field_access.code(); |
| 0 | 992 constantPoolHandle constants(THREAD, caller_method->constants()); |
| 2142 | 993 LinkResolver::resolve_field(result, constants, field_access.index(), Bytecodes::java_code(code), false, CHECK); |
| 0 | 994 patch_field_offset = result.field_offset(); |
| 995 | |
| 996 // If we're patching a field which is volatile then at compile it | |
| 997 // must not have been know to be volatile, so the generated code | |
| 998 // isn't correct for a volatile reference. The nmethod has to be | |
| 999 // deoptimized so that the code can be regenerated correctly. | |
| 1000 // This check is only needed for access_field_patching since this | |
| 1001 // is the path for patching field offsets. load_klass is only | |
| 1002 // used for patching references to oops which don't need special | |
| 1003 // handling in the volatile case. | |
| 1004 deoptimize_for_volatile = result.access_flags().is_volatile(); | |
| 1005 | |
| 1006 #ifndef PRODUCT | |
| 1007 patch_field_type = result.field_type(); | |
| 1008 #endif | |
| 1009 } else if (stub_id == Runtime1::load_klass_patching_id) { | |
| 1010 oop k; | |
| 1011 switch (code) { | |
| 1012 case Bytecodes::_putstatic: | |
| 1013 case Bytecodes::_getstatic: | |
| 1014 { klassOop klass = resolve_field_return_klass(caller_method, bci, CHECK); | |
| 1015 // Save a reference to the class that has to be checked for initialization | |
| 1016 init_klass = KlassHandle(THREAD, klass); | |
|
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1017 k = klass->java_mirror(); |
| 0 | 1018 } |
| 1019 break; | |
| 1020 case Bytecodes::_new: | |
| 2142 | 1021 { Bytecode_new bnew(caller_method(), caller_method->bcp_from(bci)); |
| 1022 k = caller_method->constants()->klass_at(bnew.index(), CHECK); | |
| 0 | 1023 } |
| 1024 break; | |
| 1025 case Bytecodes::_multianewarray: | |
| 2142 | 1026 { Bytecode_multianewarray mna(caller_method(), caller_method->bcp_from(bci)); |
| 1027 k = caller_method->constants()->klass_at(mna.index(), CHECK); | |
| 0 | 1028 } |
| 1029 break; | |
| 1030 case Bytecodes::_instanceof: | |
| 2142 | 1031 { Bytecode_instanceof io(caller_method(), caller_method->bcp_from(bci)); |
| 1032 k = caller_method->constants()->klass_at(io.index(), CHECK); | |
| 0 | 1033 } |
| 1034 break; | |
| 1035 case Bytecodes::_checkcast: | |
| 2142 | 1036 { Bytecode_checkcast cc(caller_method(), caller_method->bcp_from(bci)); |
| 1037 k = caller_method->constants()->klass_at(cc.index(), CHECK); | |
| 0 | 1038 } |
| 1039 break; | |
| 1040 case Bytecodes::_anewarray: | |
| 2142 | 1041 { Bytecode_anewarray anew(caller_method(), caller_method->bcp_from(bci)); |
| 1042 klassOop ek = caller_method->constants()->klass_at(anew.index(), CHECK); | |
| 0 | 1043 k = Klass::cast(ek)->array_klass(CHECK); |
| 1044 } | |
| 1045 break; | |
| 1046 case Bytecodes::_ldc: | |
| 1047 case Bytecodes::_ldc_w: | |
| 1048 { | |
| 2142 | 1049 Bytecode_loadconstant cc(caller_method, bci); |
| 1050 k = cc.resolve_constant(CHECK); | |
| 1602 | 1051 assert(k != NULL && !k->is_klass(), "must be class mirror or other Java constant"); |
| 0 | 1052 } |
| 1053 break; | |
|
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1054 default: |
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1055 tty->print_cr("Unhandled bytecode: %d stub_id=%d caller=%s bci=%d pc=%d", code, stub_id, caller_method->name()->as_C_string(), bci, caller_frame.pc()); |
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1056 Unimplemented(); |
| 0 | 1057 } |
| 1058 // convert to handle | |
| 1059 load_klass = Handle(THREAD, k); | |
| 1060 } else { | |
| 1061 ShouldNotReachHere(); | |
| 1062 } | |
| 1063 | |
| 1064 if (deoptimize_for_volatile) { | |
| 1065 // At compile time we assumed the field wasn't volatile but after | |
| 1066 // loading it turns out it was volatile so we have to throw the | |
| 1067 // compiled code out and let it be regenerated. | |
| 1068 if (TracePatching) { | |
| 1069 tty->print_cr("Deoptimizing for patching volatile field reference"); | |
| 1070 } | |
|
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1071 // It's possible the nmethod was invalidated in the last |
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1072 // safepoint, but if it's still alive then make it not_entrant. |
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1073 nmethod* nm = CodeCache::find_nmethod(caller_frame.pc()); |
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1074 if (nm != NULL) { |
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1075 nm->make_not_entrant(); |
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1076 } |
|
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1078 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint); |
| 0 | 1079 |
| 1080 // Return to the now deoptimized frame. | |
| 1081 } | |
| 1082 | |
| 1602 | 1083 // If we are patching in a non-perm oop, make sure the nmethod |
| 1084 // is on the right list. | |
| 1085 if (ScavengeRootsInCode && load_klass.not_null() && load_klass->is_scavengable()) { | |
| 1086 MutexLockerEx ml_code (CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 1087 nmethod* nm = CodeCache::find_nmethod(caller_frame.pc()); | |
| 1088 guarantee(nm != NULL, "only nmethods can contain non-perm oops"); | |
| 1089 if (!nm->on_scavenge_root_list()) | |
| 1090 CodeCache::add_scavenge_root_nmethod(nm); | |
| 1091 } | |
| 0 | 1092 |
| 1093 // Now copy code back | |
| 1094 | |
| 1095 { | |
| 1096 MutexLockerEx ml_patch (Patching_lock, Mutex::_no_safepoint_check_flag); | |
| 1097 // | |
| 1098 // Deoptimization may have happened while we waited for the lock. | |
| 1099 // In that case we don't bother to do any patching we just return | |
| 1100 // and let the deopt happen | |
| 1101 if (!caller_is_deopted()) { | |
| 1102 NativeGeneralJump* jump = nativeGeneralJump_at(caller_frame.pc()); | |
| 1103 address instr_pc = jump->jump_destination(); | |
| 1104 NativeInstruction* ni = nativeInstruction_at(instr_pc); | |
| 1105 if (ni->is_jump() ) { | |
| 1106 // the jump has not been patched yet | |
| 1107 // The jump destination is slow case and therefore not part of the stubs | |
| 1108 // (stubs are only for StaticCalls) | |
| 1109 | |
| 1110 // format of buffer | |
| 1111 // .... | |
| 1112 // instr byte 0 <-- copy_buff | |
| 1113 // instr byte 1 | |
| 1114 // .. | |
| 1115 // instr byte n-1 | |
| 1116 // n | |
| 1117 // .... <-- call destination | |
| 1118 | |
| 1119 address stub_location = caller_frame.pc() + PatchingStub::patch_info_offset(); | |
| 1120 unsigned char* byte_count = (unsigned char*) (stub_location - 1); | |
| 1121 unsigned char* byte_skip = (unsigned char*) (stub_location - 2); | |
| 1122 unsigned char* being_initialized_entry_offset = (unsigned char*) (stub_location - 3); | |
| 1123 address copy_buff = stub_location - *byte_skip - *byte_count; | |
| 1124 address being_initialized_entry = stub_location - *being_initialized_entry_offset; | |
| 1125 if (TracePatching) { | |
| 1126 tty->print_cr(" Patching %s at bci %d at address 0x%x (%s)", Bytecodes::name(code), bci, | |
| 1127 instr_pc, (stub_id == Runtime1::access_field_patching_id) ? "field" : "klass"); | |
| 1128 nmethod* caller_code = CodeCache::find_nmethod(caller_frame.pc()); | |
| 1129 assert(caller_code != NULL, "nmethod not found"); | |
| 1130 | |
| 1131 // NOTE we use pc() not original_pc() because we already know they are | |
| 1132 // identical otherwise we'd have never entered this block of code | |
| 1133 | |
| 1134 OopMap* map = caller_code->oop_map_for_return_address(caller_frame.pc()); | |
| 1135 assert(map != NULL, "null check"); | |
| 1136 map->print(); | |
| 1137 tty->cr(); | |
| 1138 | |
| 1139 Disassembler::decode(copy_buff, copy_buff + *byte_count, tty); | |
| 1140 } | |
| 1141 // depending on the code below, do_patch says whether to copy the patch body back into the nmethod | |
| 1142 bool do_patch = true; | |
| 1143 if (stub_id == Runtime1::access_field_patching_id) { | |
| 1144 // The offset may not be correct if the class was not loaded at code generation time. | |
| 1145 // Set it now. | |
| 1146 NativeMovRegMem* n_move = nativeMovRegMem_at(copy_buff); | |
| 1147 assert(n_move->offset() == 0 || (n_move->offset() == 4 && (patch_field_type == T_DOUBLE || patch_field_type == T_LONG)), "illegal offset for type"); | |
| 1148 assert(patch_field_offset >= 0, "illegal offset"); | |
| 1149 n_move->add_offset_in_bytes(patch_field_offset); | |
| 1150 } else if (stub_id == Runtime1::load_klass_patching_id) { | |
| 1151 // If a getstatic or putstatic is referencing a klass which | |
| 1152 // isn't fully initialized, the patch body isn't copied into | |
| 1153 // place until initialization is complete. In this case the | |
| 1154 // patch site is setup so that any threads besides the | |
| 1155 // initializing thread are forced to come into the VM and | |
| 1156 // block. | |
| 1157 do_patch = (code != Bytecodes::_getstatic && code != Bytecodes::_putstatic) || | |
| 1158 instanceKlass::cast(init_klass())->is_initialized(); | |
| 1159 NativeGeneralJump* jump = nativeGeneralJump_at(instr_pc); | |
| 1160 if (jump->jump_destination() == being_initialized_entry) { | |
| 1161 assert(do_patch == true, "initialization must be complete at this point"); | |
| 1162 } else { | |
| 1163 // patch the instruction <move reg, klass> | |
| 1164 NativeMovConstReg* n_copy = nativeMovConstReg_at(copy_buff); | |
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1165 |
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1166 assert(n_copy->data() == 0 || |
| 1783 | 1167 n_copy->data() == (intptr_t)Universe::non_oop_word(), |
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1168 "illegal init value"); |
| 0 | 1169 assert(load_klass() != NULL, "klass not set"); |
| 1170 n_copy->set_data((intx) (load_klass())); | |
| 1171 | |
| 1172 if (TracePatching) { | |
| 1173 Disassembler::decode(copy_buff, copy_buff + *byte_count, tty); | |
| 1174 } | |
| 1175 | |
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1176 #if defined(SPARC) || defined(PPC) |
| 0 | 1177 // Update the oop location in the nmethod with the proper |
| 1178 // oop. When the code was generated, a NULL was stuffed | |
| 1179 // in the oop table and that table needs to be update to | |
| 1180 // have the right value. On intel the value is kept | |
| 1181 // directly in the instruction instead of in the oop | |
| 1182 // table, so set_data above effectively updated the value. | |
| 1183 nmethod* nm = CodeCache::find_nmethod(instr_pc); | |
| 1184 assert(nm != NULL, "invalid nmethod_pc"); | |
| 1185 RelocIterator oops(nm, copy_buff, copy_buff + 1); | |
| 1186 bool found = false; | |
| 1187 while (oops.next() && !found) { | |
| 1188 if (oops.type() == relocInfo::oop_type) { | |
| 1189 oop_Relocation* r = oops.oop_reloc(); | |
| 1190 oop* oop_adr = r->oop_addr(); | |
| 1191 *oop_adr = load_klass(); | |
| 1192 r->fix_oop_relocation(); | |
| 1193 found = true; | |
| 1194 } | |
| 1195 } | |
| 1196 assert(found, "the oop must exist!"); | |
| 1197 #endif | |
| 1198 | |
| 1199 } | |
| 1200 } else { | |
| 1201 ShouldNotReachHere(); | |
| 1202 } | |
| 1203 if (do_patch) { | |
| 1204 // replace instructions | |
| 1205 // first replace the tail, then the call | |
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1206 #ifdef ARM |
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1207 if(stub_id == Runtime1::load_klass_patching_id && !VM_Version::supports_movw()) { |
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1208 nmethod* nm = CodeCache::find_nmethod(instr_pc); |
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1209 oop* oop_addr = NULL; |
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1210 assert(nm != NULL, "invalid nmethod_pc"); |
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1211 RelocIterator oops(nm, copy_buff, copy_buff + 1); |
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1212 while (oops.next()) { |
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1213 if (oops.type() == relocInfo::oop_type) { |
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1214 oop_Relocation* r = oops.oop_reloc(); |
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1215 oop_addr = r->oop_addr(); |
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1216 break; |
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1217 } |
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1218 } |
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1219 assert(oop_addr != NULL, "oop relocation must exist"); |
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1220 copy_buff -= *byte_count; |
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1221 NativeMovConstReg* n_copy2 = nativeMovConstReg_at(copy_buff); |
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1222 n_copy2->set_pc_relative_offset((address)oop_addr, instr_pc); |
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1223 } |
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1224 #endif |
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1225 |
| 0 | 1226 for (int i = NativeCall::instruction_size; i < *byte_count; i++) { |
| 1227 address ptr = copy_buff + i; | |
| 1228 int a_byte = (*ptr) & 0xFF; | |
| 1229 address dst = instr_pc + i; | |
| 1230 *(unsigned char*)dst = (unsigned char) a_byte; | |
| 1231 } | |
| 1232 ICache::invalidate_range(instr_pc, *byte_count); | |
| 1233 NativeGeneralJump::replace_mt_safe(instr_pc, copy_buff); | |
| 1234 | |
| 1235 if (stub_id == Runtime1::load_klass_patching_id) { | |
| 1236 // update relocInfo to oop | |
| 1237 nmethod* nm = CodeCache::find_nmethod(instr_pc); | |
| 1238 assert(nm != NULL, "invalid nmethod_pc"); | |
| 1239 | |
| 1240 // The old patch site is now a move instruction so update | |
| 1241 // the reloc info so that it will get updated during | |
| 1242 // future GCs. | |
| 1243 RelocIterator iter(nm, (address)instr_pc, (address)(instr_pc + 1)); | |
| 1244 relocInfo::change_reloc_info_for_address(&iter, (address) instr_pc, | |
| 1245 relocInfo::none, relocInfo::oop_type); | |
| 1246 #ifdef SPARC | |
| 1247 // Sparc takes two relocations for an oop so update the second one. | |
| 1248 address instr_pc2 = instr_pc + NativeMovConstReg::add_offset; | |
| 1249 RelocIterator iter2(nm, instr_pc2, instr_pc2 + 1); | |
| 1250 relocInfo::change_reloc_info_for_address(&iter2, (address) instr_pc2, | |
| 1251 relocInfo::none, relocInfo::oop_type); | |
| 1252 #endif | |
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1253 #ifdef PPC |
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1254 { address instr_pc2 = instr_pc + NativeMovConstReg::lo_offset; |
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1255 RelocIterator iter2(nm, instr_pc2, instr_pc2 + 1); |
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1256 relocInfo::change_reloc_info_for_address(&iter2, (address) instr_pc2, relocInfo::none, relocInfo::oop_type); |
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1257 } |
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1258 #endif |
| 0 | 1259 } |
| 1260 | |
| 1261 } else { | |
| 1262 ICache::invalidate_range(copy_buff, *byte_count); | |
| 1263 NativeGeneralJump::insert_unconditional(instr_pc, being_initialized_entry); | |
| 1264 } | |
| 1265 } | |
| 1266 } | |
| 1267 } | |
| 1268 JRT_END | |
| 1269 | |
| 1270 // | |
| 1271 // Entry point for compiled code. We want to patch a nmethod. | |
| 1272 // We don't do a normal VM transition here because we want to | |
| 1273 // know after the patching is complete and any safepoint(s) are taken | |
| 1274 // if the calling nmethod was deoptimized. We do this by calling a | |
| 1275 // helper method which does the normal VM transition and when it | |
| 1276 // completes we can check for deoptimization. This simplifies the | |
| 1277 // assembly code in the cpu directories. | |
| 1278 // | |
| 1279 int Runtime1::move_klass_patching(JavaThread* thread) { | |
| 1280 // | |
| 1281 // NOTE: we are still in Java | |
| 1282 // | |
| 1283 Thread* THREAD = thread; | |
| 1284 debug_only(NoHandleMark nhm;) | |
| 1285 { | |
| 1286 // Enter VM mode | |
| 1287 | |
| 1288 ResetNoHandleMark rnhm; | |
| 1289 patch_code(thread, load_klass_patching_id); | |
| 1290 } | |
| 1291 // Back in JAVA, use no oops DON'T safepoint | |
| 1292 | |
| 1293 // Return true if calling code is deoptimized | |
| 1294 | |
| 1295 return caller_is_deopted(); | |
| 1296 } | |
| 1297 | |
| 1298 // | |
| 1299 // Entry point for compiled code. We want to patch a nmethod. | |
| 1300 // We don't do a normal VM transition here because we want to | |
| 1301 // know after the patching is complete and any safepoint(s) are taken | |
| 1302 // if the calling nmethod was deoptimized. We do this by calling a | |
| 1303 // helper method which does the normal VM transition and when it | |
| 1304 // completes we can check for deoptimization. This simplifies the | |
| 1305 // assembly code in the cpu directories. | |
| 1306 // | |
| 1307 | |
| 1308 int Runtime1::access_field_patching(JavaThread* thread) { | |
| 1309 // | |
| 1310 // NOTE: we are still in Java | |
| 1311 // | |
| 1312 Thread* THREAD = thread; | |
| 1313 debug_only(NoHandleMark nhm;) | |
| 1314 { | |
| 1315 // Enter VM mode | |
| 1316 | |
| 1317 ResetNoHandleMark rnhm; | |
| 1318 patch_code(thread, access_field_patching_id); | |
| 1319 } | |
| 1320 // Back in JAVA, use no oops DON'T safepoint | |
| 1321 | |
| 1322 // Return true if calling code is deoptimized | |
| 1323 | |
| 1324 return caller_is_deopted(); | |
| 1325 JRT_END | |
| 1326 | |
| 1327 | |
| 1328 JRT_LEAF(void, Runtime1::trace_block_entry(jint block_id)) | |
| 1329 // for now we just print out the block id | |
| 1330 tty->print("%d ", block_id); | |
| 1331 JRT_END | |
| 1332 | |
| 1333 | |
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1334 // Array copy return codes. |
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1335 enum { |
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1336 ac_failed = -1, // arraycopy failed |
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1337 ac_ok = 0 // arraycopy succeeded |
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1338 }; |
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1339 |
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1340 |
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1341 // Below length is the # elements copied. |
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1342 template <class T> int obj_arraycopy_work(oopDesc* src, T* src_addr, |
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1343 oopDesc* dst, T* dst_addr, |
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1344 int length) { |
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1345 |
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1346 // For performance reasons, we assume we are using a card marking write |
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1347 // barrier. The assert will fail if this is not the case. |
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1348 // Note that we use the non-virtual inlineable variant of write_ref_array. |
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1349 BarrierSet* bs = Universe::heap()->barrier_set(); |
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1350 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); |
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1351 assert(bs->has_write_ref_array_pre_opt(), "For pre-barrier as well."); |
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1352 if (src == dst) { |
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1353 // same object, no check |
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1354 bs->write_ref_array_pre(dst_addr, length); |
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1355 Copy::conjoint_oops_atomic(src_addr, dst_addr, length); |
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1356 bs->write_ref_array((HeapWord*)dst_addr, length); |
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1357 return ac_ok; |
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1358 } else { |
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1359 klassOop bound = objArrayKlass::cast(dst->klass())->element_klass(); |
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1360 klassOop stype = objArrayKlass::cast(src->klass())->element_klass(); |
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1361 if (stype == bound || Klass::cast(stype)->is_subtype_of(bound)) { |
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1362 // Elements are guaranteed to be subtypes, so no check necessary |
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1363 bs->write_ref_array_pre(dst_addr, length); |
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1364 Copy::conjoint_oops_atomic(src_addr, dst_addr, length); |
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1365 bs->write_ref_array((HeapWord*)dst_addr, length); |
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1366 return ac_ok; |
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1367 } |
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1368 } |
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1369 return ac_failed; |
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1370 } |
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1371 |
| 0 | 1372 // fast and direct copy of arrays; returning -1, means that an exception may be thrown |
| 1373 // and we did not copy anything | |
| 1374 JRT_LEAF(int, Runtime1::arraycopy(oopDesc* src, int src_pos, oopDesc* dst, int dst_pos, int length)) | |
| 1375 #ifndef PRODUCT | |
| 1376 _generic_arraycopy_cnt++; // Slow-path oop array copy | |
| 1377 #endif | |
| 1378 | |
| 1379 if (src == NULL || dst == NULL || src_pos < 0 || dst_pos < 0 || length < 0) return ac_failed; | |
| 1380 if (!dst->is_array() || !src->is_array()) return ac_failed; | |
| 1381 if ((unsigned int) arrayOop(src)->length() < (unsigned int)src_pos + (unsigned int)length) return ac_failed; | |
| 1382 if ((unsigned int) arrayOop(dst)->length() < (unsigned int)dst_pos + (unsigned int)length) return ac_failed; | |
| 1383 | |
| 1384 if (length == 0) return ac_ok; | |
| 1385 if (src->is_typeArray()) { | |
| 1386 const klassOop klass_oop = src->klass(); | |
| 1387 if (klass_oop != dst->klass()) return ac_failed; | |
| 1388 typeArrayKlass* klass = typeArrayKlass::cast(klass_oop); | |
| 1389 const int l2es = klass->log2_element_size(); | |
| 1390 const int ihs = klass->array_header_in_bytes() / wordSize; | |
| 1391 char* src_addr = (char*) ((oopDesc**)src + ihs) + (src_pos << l2es); | |
| 1392 char* dst_addr = (char*) ((oopDesc**)dst + ihs) + (dst_pos << l2es); | |
| 1393 // Potential problem: memmove is not guaranteed to be word atomic | |
| 1394 // Revisit in Merlin | |
| 1395 memmove(dst_addr, src_addr, length << l2es); | |
| 1396 return ac_ok; | |
| 1397 } else if (src->is_objArray() && dst->is_objArray()) { | |
| 2002 | 1398 if (UseCompressedOops) { |
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1399 narrowOop *src_addr = objArrayOop(src)->obj_at_addr<narrowOop>(src_pos); |
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1400 narrowOop *dst_addr = objArrayOop(dst)->obj_at_addr<narrowOop>(dst_pos); |
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1401 return obj_arraycopy_work(src, src_addr, dst, dst_addr, length); |
| 0 | 1402 } else { |
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1403 oop *src_addr = objArrayOop(src)->obj_at_addr<oop>(src_pos); |
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1404 oop *dst_addr = objArrayOop(dst)->obj_at_addr<oop>(dst_pos); |
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1405 return obj_arraycopy_work(src, src_addr, dst, dst_addr, length); |
| 0 | 1406 } |
| 1407 } | |
| 1408 return ac_failed; | |
| 1409 JRT_END | |
| 1410 | |
| 1411 | |
| 1412 JRT_LEAF(void, Runtime1::primitive_arraycopy(HeapWord* src, HeapWord* dst, int length)) | |
| 1413 #ifndef PRODUCT | |
| 1414 _primitive_arraycopy_cnt++; | |
| 1415 #endif | |
| 1416 | |
| 1417 if (length == 0) return; | |
| 1418 // Not guaranteed to be word atomic, but that doesn't matter | |
| 1419 // for anything but an oop array, which is covered by oop_arraycopy. | |
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1420 Copy::conjoint_jbytes(src, dst, length); |
| 0 | 1421 JRT_END |
| 1422 | |
| 1423 JRT_LEAF(void, Runtime1::oop_arraycopy(HeapWord* src, HeapWord* dst, int num)) | |
| 1424 #ifndef PRODUCT | |
| 1425 _oop_arraycopy_cnt++; | |
| 1426 #endif | |
| 1427 | |
| 1428 if (num == 0) return; | |
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1429 BarrierSet* bs = Universe::heap()->barrier_set(); |
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1430 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); |
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1431 assert(bs->has_write_ref_array_pre_opt(), "For pre-barrier as well."); |
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1432 if (UseCompressedOops) { |
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1433 bs->write_ref_array_pre((narrowOop*)dst, num); |
| 2002 | 1434 Copy::conjoint_oops_atomic((narrowOop*) src, (narrowOop*) dst, num); |
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1435 } else { |
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1436 bs->write_ref_array_pre((oop*)dst, num); |
| 2002 | 1437 Copy::conjoint_oops_atomic((oop*) src, (oop*) dst, num); |
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1438 } |
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1439 bs->write_ref_array(dst, num); |
| 0 | 1440 JRT_END |
| 1441 | |
| 1442 | |
| 6135 | 1443 JRT_LEAF(int, Runtime1::is_instance_of(oopDesc* mirror, oopDesc* obj)) |
| 1444 // had to return int instead of bool, otherwise there may be a mismatch | |
| 1445 // between the C calling convention and the Java one. | |
| 1446 // e.g., on x86, GCC may clear only %al when returning a bool false, but | |
| 1447 // JVM takes the whole %eax as the return value, which may misinterpret | |
| 1448 // the return value as a boolean true. | |
| 1449 | |
| 1450 assert(mirror != NULL, "should null-check on mirror before calling"); | |
| 1451 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 1452 return (k != NULL && obj != NULL && obj->is_a(k)) ? 1 : 0; | |
| 1453 JRT_END | |
| 1454 | |
| 1455 | |
| 0 | 1456 #ifndef PRODUCT |
| 1457 void Runtime1::print_statistics() { | |
| 1458 tty->print_cr("C1 Runtime statistics:"); | |
| 1459 tty->print_cr(" _resolve_invoke_virtual_cnt: %d", SharedRuntime::_resolve_virtual_ctr); | |
| 1460 tty->print_cr(" _resolve_invoke_opt_virtual_cnt: %d", SharedRuntime::_resolve_opt_virtual_ctr); | |
| 1461 tty->print_cr(" _resolve_invoke_static_cnt: %d", SharedRuntime::_resolve_static_ctr); | |
| 1462 tty->print_cr(" _handle_wrong_method_cnt: %d", SharedRuntime::_wrong_method_ctr); | |
| 1463 tty->print_cr(" _ic_miss_cnt: %d", SharedRuntime::_ic_miss_ctr); | |
| 1464 tty->print_cr(" _generic_arraycopy_cnt: %d", _generic_arraycopy_cnt); | |
| 2446 | 1465 tty->print_cr(" _generic_arraycopystub_cnt: %d", _generic_arraycopystub_cnt); |
| 1466 tty->print_cr(" _byte_arraycopy_cnt: %d", _byte_arraycopy_cnt); | |
| 1467 tty->print_cr(" _short_arraycopy_cnt: %d", _short_arraycopy_cnt); | |
| 1468 tty->print_cr(" _int_arraycopy_cnt: %d", _int_arraycopy_cnt); | |
| 1469 tty->print_cr(" _long_arraycopy_cnt: %d", _long_arraycopy_cnt); | |
| 0 | 1470 tty->print_cr(" _primitive_arraycopy_cnt: %d", _primitive_arraycopy_cnt); |
| 2446 | 1471 tty->print_cr(" _oop_arraycopy_cnt (C): %d", Runtime1::_oop_arraycopy_cnt); |
| 1472 tty->print_cr(" _oop_arraycopy_cnt (stub): %d", _oop_arraycopy_cnt); | |
| 0 | 1473 tty->print_cr(" _arraycopy_slowcase_cnt: %d", _arraycopy_slowcase_cnt); |
| 2446 | 1474 tty->print_cr(" _arraycopy_checkcast_cnt: %d", _arraycopy_checkcast_cnt); |
| 1475 tty->print_cr(" _arraycopy_checkcast_attempt_cnt:%d", _arraycopy_checkcast_attempt_cnt); | |
| 0 | 1476 |
| 1477 tty->print_cr(" _new_type_array_slowcase_cnt: %d", _new_type_array_slowcase_cnt); | |
| 1478 tty->print_cr(" _new_object_array_slowcase_cnt: %d", _new_object_array_slowcase_cnt); | |
| 1479 tty->print_cr(" _new_instance_slowcase_cnt: %d", _new_instance_slowcase_cnt); | |
| 1480 tty->print_cr(" _new_multi_array_slowcase_cnt: %d", _new_multi_array_slowcase_cnt); | |
| 1481 tty->print_cr(" _monitorenter_slowcase_cnt: %d", _monitorenter_slowcase_cnt); | |
| 1482 tty->print_cr(" _monitorexit_slowcase_cnt: %d", _monitorexit_slowcase_cnt); | |
| 1483 tty->print_cr(" _patch_code_slowcase_cnt: %d", _patch_code_slowcase_cnt); | |
| 1484 | |
| 1485 tty->print_cr(" _throw_range_check_exception_count: %d:", _throw_range_check_exception_count); | |
| 1486 tty->print_cr(" _throw_index_exception_count: %d:", _throw_index_exception_count); | |
| 1487 tty->print_cr(" _throw_div0_exception_count: %d:", _throw_div0_exception_count); | |
| 1488 tty->print_cr(" _throw_null_pointer_exception_count: %d:", _throw_null_pointer_exception_count); | |
| 1489 tty->print_cr(" _throw_class_cast_exception_count: %d:", _throw_class_cast_exception_count); | |
| 1490 tty->print_cr(" _throw_incompatible_class_change_error_count: %d:", _throw_incompatible_class_change_error_count); | |
| 1491 tty->print_cr(" _throw_array_store_exception_count: %d:", _throw_array_store_exception_count); | |
| 1492 tty->print_cr(" _throw_count: %d:", _throw_count); | |
| 1493 | |
| 1494 SharedRuntime::print_ic_miss_histogram(); | |
| 1495 tty->cr(); | |
| 1496 } | |
| 1497 #endif // PRODUCT |