Mercurial > hg > truffle
annotate src/share/vm/c1/c1_Runtime1.cpp @ 5073:2db1ad9dd385
rename PiNode.value to PiNode.object and UnsafeCastNode.x to UnsafeCastNode.object
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Wed, 14 Mar 2012 16:57:18 +0100 |
parents | 532be189cf09 |
children | 0ebca2e35ca5 |
rev | line source |
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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()); |
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: | |
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204 case counter_overflow_id: |
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205 #if defined(SPARC) || defined(PPC) |
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206 case handle_exception_nofpu_id: // Unused on sparc |
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207 #endif |
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208 #ifdef GRAAL |
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209 case graal_verify_pointer_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); | |
305 FUNCTION_CASE(entry, trace_block_entry); | |
306 | |
307 #undef FUNCTION_CASE | |
308 | |
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309 // Soft float adds more runtime names. |
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310 return pd_name_for_address(entry); |
0 | 311 } |
312 | |
313 | |
314 JRT_ENTRY(void, Runtime1::new_instance(JavaThread* thread, klassOopDesc* klass)) | |
315 NOT_PRODUCT(_new_instance_slowcase_cnt++;) | |
316 | |
317 assert(oop(klass)->is_klass(), "not a class"); | |
318 instanceKlassHandle h(thread, klass); | |
319 h->check_valid_for_instantiation(true, CHECK); | |
320 // make sure klass is initialized | |
321 h->initialize(CHECK); | |
322 // allocate instance and return via TLS | |
323 oop obj = h->allocate_instance(CHECK); | |
324 thread->set_vm_result(obj); | |
325 JRT_END | |
326 | |
327 | |
328 JRT_ENTRY(void, Runtime1::new_type_array(JavaThread* thread, klassOopDesc* klass, jint length)) | |
329 NOT_PRODUCT(_new_type_array_slowcase_cnt++;) | |
330 // Note: no handle for klass needed since they are not used | |
331 // anymore after new_typeArray() and no GC can happen before. | |
332 // (This may have to change if this code changes!) | |
333 assert(oop(klass)->is_klass(), "not a class"); | |
334 BasicType elt_type = typeArrayKlass::cast(klass)->element_type(); | |
335 oop obj = oopFactory::new_typeArray(elt_type, length, CHECK); | |
336 thread->set_vm_result(obj); | |
337 // This is pretty rare but this runtime patch is stressful to deoptimization | |
338 // if we deoptimize here so force a deopt to stress the path. | |
339 if (DeoptimizeALot) { | |
340 deopt_caller(); | |
341 } | |
342 | |
343 JRT_END | |
344 | |
345 | |
346 JRT_ENTRY(void, Runtime1::new_object_array(JavaThread* thread, klassOopDesc* array_klass, jint length)) | |
347 NOT_PRODUCT(_new_object_array_slowcase_cnt++;) | |
348 | |
349 // Note: no handle for klass needed since they are not used | |
350 // anymore after new_objArray() and no GC can happen before. | |
351 // (This may have to change if this code changes!) | |
352 assert(oop(array_klass)->is_klass(), "not a class"); | |
353 klassOop elem_klass = objArrayKlass::cast(array_klass)->element_klass(); | |
354 objArrayOop obj = oopFactory::new_objArray(elem_klass, length, CHECK); | |
355 thread->set_vm_result(obj); | |
356 // This is pretty rare but this runtime patch is stressful to deoptimization | |
357 // if we deoptimize here so force a deopt to stress the path. | |
358 if (DeoptimizeALot) { | |
359 deopt_caller(); | |
360 } | |
361 JRT_END | |
362 | |
363 | |
364 JRT_ENTRY(void, Runtime1::new_multi_array(JavaThread* thread, klassOopDesc* klass, int rank, jint* dims)) | |
365 NOT_PRODUCT(_new_multi_array_slowcase_cnt++;) | |
366 | |
367 assert(oop(klass)->is_klass(), "not a class"); | |
368 assert(rank >= 1, "rank must be nonzero"); | |
369 oop obj = arrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK); | |
370 thread->set_vm_result(obj); | |
371 JRT_END | |
372 | |
373 | |
374 JRT_ENTRY(void, Runtime1::unimplemented_entry(JavaThread* thread, StubID id)) | |
375 tty->print_cr("Runtime1::entry_for(%d) returned unimplemented entry point", id); | |
376 JRT_END | |
377 | |
378 | |
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379 JRT_ENTRY(void, Runtime1::throw_array_store_exception(JavaThread* thread, oopDesc* obj)) |
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380 ResourceMark rm(thread); |
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381 const char* klass_name = Klass::cast(obj->klass())->external_name(); |
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382 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArrayStoreException(), klass_name); |
0 | 383 JRT_END |
384 | |
385 | |
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386 // counter_overflow() is called from within C1-compiled methods. The enclosing method is the method |
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387 // associated with the top activation record. The inlinee (that is possibly included in the enclosing |
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388 // method) method oop is passed as an argument. In order to do that it is embedded in the code as |
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389 // a constant. |
1783 | 390 static nmethod* counter_overflow_helper(JavaThread* THREAD, int branch_bci, methodOopDesc* m) { |
391 nmethod* osr_nm = NULL; | |
392 methodHandle method(THREAD, m); | |
393 | |
394 RegisterMap map(THREAD, false); | |
395 frame fr = THREAD->last_frame().sender(&map); | |
0 | 396 nmethod* nm = (nmethod*) fr.cb(); |
1783 | 397 assert(nm!= NULL && nm->is_nmethod(), "Sanity check"); |
398 methodHandle enclosing_method(THREAD, nm->method()); | |
399 | |
400 CompLevel level = (CompLevel)nm->comp_level(); | |
401 int bci = InvocationEntryBci; | |
402 if (branch_bci != InvocationEntryBci) { | |
403 // Compute desination bci | |
404 address pc = method()->code_base() + branch_bci; | |
2142 | 405 Bytecodes::Code branch = Bytecodes::code_at(method(), pc); |
1783 | 406 int offset = 0; |
407 switch (branch) { | |
408 case Bytecodes::_if_icmplt: case Bytecodes::_iflt: | |
409 case Bytecodes::_if_icmpgt: case Bytecodes::_ifgt: | |
410 case Bytecodes::_if_icmple: case Bytecodes::_ifle: | |
411 case Bytecodes::_if_icmpge: case Bytecodes::_ifge: | |
412 case Bytecodes::_if_icmpeq: case Bytecodes::_if_acmpeq: case Bytecodes::_ifeq: | |
413 case Bytecodes::_if_icmpne: case Bytecodes::_if_acmpne: case Bytecodes::_ifne: | |
414 case Bytecodes::_ifnull: case Bytecodes::_ifnonnull: case Bytecodes::_goto: | |
415 offset = (int16_t)Bytes::get_Java_u2(pc + 1); | |
416 break; | |
417 case Bytecodes::_goto_w: | |
418 offset = Bytes::get_Java_u4(pc + 1); | |
419 break; | |
420 default: ; | |
0 | 421 } |
1783 | 422 bci = branch_bci + offset; |
423 } | |
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424 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); |
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425 osr_nm = CompilationPolicy::policy()->event(enclosing_method, method, branch_bci, bci, level, nm, THREAD); |
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426 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); |
1783 | 427 return osr_nm; |
428 } | |
429 | |
430 JRT_BLOCK_ENTRY(address, Runtime1::counter_overflow(JavaThread* thread, int bci, methodOopDesc* method)) | |
431 nmethod* osr_nm; | |
432 JRT_BLOCK | |
433 osr_nm = counter_overflow_helper(thread, bci, method); | |
434 if (osr_nm != NULL) { | |
435 RegisterMap map(thread, false); | |
436 frame fr = thread->last_frame().sender(&map); | |
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437 Deoptimization::deoptimize_frame(thread, fr.id()); |
0 | 438 } |
1783 | 439 JRT_BLOCK_END |
440 return NULL; | |
0 | 441 JRT_END |
442 | |
443 extern void vm_exit(int code); | |
444 | |
445 // Enter this method from compiled code handler below. This is where we transition | |
446 // to VM mode. This is done as a helper routine so that the method called directly | |
447 // from compiled code does not have to transition to VM. This allows the entry | |
448 // method to see if the nmethod that we have just looked up a handler for has | |
449 // been deoptimized while we were in the vm. This simplifies the assembly code | |
450 // cpu directories. | |
451 // | |
452 // We are entering here from exception stub (via the entry method below) | |
453 // If there is a compiled exception handler in this method, we will continue there; | |
454 // otherwise we will unwind the stack and continue at the caller of top frame method | |
455 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to | |
456 // control the area where we can allow a safepoint. After we exit the safepoint area we can | |
457 // check to see if the handler we are going to return is now in a nmethod that has | |
458 // been deoptimized. If that is the case we return the deopt blob | |
459 // unpack_with_exception entry instead. This makes life for the exception blob easier | |
460 // because making that same check and diverting is painful from assembly language. | |
461 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, nmethod*& nm)) | |
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462 // Reset method handle flag. |
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463 thread->set_is_method_handle_return(false); |
0 | 464 |
465 Handle exception(thread, ex); | |
466 nm = CodeCache::find_nmethod(pc); | |
467 assert(nm != NULL, "this is not an nmethod"); | |
468 // Adjust the pc as needed/ | |
469 if (nm->is_deopt_pc(pc)) { | |
470 RegisterMap map(thread, false); | |
471 frame exception_frame = thread->last_frame().sender(&map); | |
472 // if the frame isn't deopted then pc must not correspond to the caller of last_frame | |
473 assert(exception_frame.is_deoptimized_frame(), "must be deopted"); | |
474 pc = exception_frame.pc(); | |
475 } | |
476 #ifdef ASSERT | |
477 assert(exception.not_null(), "NULL exceptions should be handled by throw_exception"); | |
478 assert(exception->is_oop(), "just checking"); | |
479 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError | |
1142 | 480 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) { |
0 | 481 if (ExitVMOnVerifyError) vm_exit(-1); |
482 ShouldNotReachHere(); | |
483 } | |
484 #endif | |
485 | |
486 // Check the stack guard pages and reenable them if necessary and there is | |
487 // enough space on the stack to do so. Use fast exceptions only if the guard | |
488 // pages are enabled. | |
489 bool guard_pages_enabled = thread->stack_yellow_zone_enabled(); | |
490 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack(); | |
491 | |
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492 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 493 // To ensure correct notification of exception catches and throws |
494 // we have to deoptimize here. If we attempted to notify the | |
495 // catches and throws during this exception lookup it's possible | |
496 // we could deoptimize on the way out of the VM and end back in | |
497 // the interpreter at the throw site. This would result in double | |
498 // notifications since the interpreter would also notify about | |
499 // these same catches and throws as it unwound the frame. | |
500 | |
501 RegisterMap reg_map(thread); | |
502 frame stub_frame = thread->last_frame(); | |
503 frame caller_frame = stub_frame.sender(®_map); | |
504 | |
505 // We don't really want to deoptimize the nmethod itself since we | |
506 // can actually continue in the exception handler ourselves but I | |
507 // don't see an easy way to have the desired effect. | |
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508 Deoptimization::deoptimize_frame(thread, caller_frame.id()); |
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509 assert(caller_is_deopted(), "Must be deoptimized"); |
0 | 510 |
511 return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls(); | |
512 } | |
513 | |
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514 // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions |
0 | 515 if (guard_pages_enabled) { |
516 address fast_continuation = nm->handler_for_exception_and_pc(exception, pc); | |
517 if (fast_continuation != NULL) { | |
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518 // Set flag if return address is a method handle call site. |
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519 thread->set_is_method_handle_return(nm->is_method_handle_return(pc)); |
0 | 520 return fast_continuation; |
521 } | |
522 } | |
523 | |
524 // If the stack guard pages are enabled, check whether there is a handler in | |
525 // the current method. Otherwise (guard pages disabled), force an unwind and | |
526 // skip the exception cache update (i.e., just leave continuation==NULL). | |
527 address continuation = NULL; | |
528 if (guard_pages_enabled) { | |
529 | |
530 // New exception handling mechanism can support inlined methods | |
531 // with exception handlers since the mappings are from PC to PC | |
532 | |
533 // debugging support | |
534 // tracing | |
535 if (TraceExceptions) { | |
536 ttyLocker ttyl; | |
537 ResourceMark rm; | |
538 tty->print_cr("Exception <%s> (0x%x) thrown in compiled method <%s> at PC " PTR_FORMAT " for thread 0x%x", | |
539 exception->print_value_string(), (address)exception(), nm->method()->print_value_string(), pc, thread); | |
540 } | |
541 // for AbortVMOnException flag | |
542 NOT_PRODUCT(Exceptions::debug_check_abort(exception)); | |
543 | |
544 // Clear out the exception oop and pc since looking up an | |
545 // exception handler can cause class loading, which might throw an | |
546 // exception and those fields are expected to be clear during | |
547 // normal bytecode execution. | |
548 thread->set_exception_oop(NULL); | |
549 thread->set_exception_pc(NULL); | |
550 | |
551 continuation = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, false, false); | |
552 // If an exception was thrown during exception dispatch, the exception oop may have changed | |
553 thread->set_exception_oop(exception()); | |
554 thread->set_exception_pc(pc); | |
555 | |
556 // the exception cache is used only by non-implicit exceptions | |
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557 if (continuation != NULL && !SharedRuntime::deopt_blob()->contains(continuation)) { |
0 | 558 nm->add_handler_for_exception_and_pc(exception, pc, continuation); |
559 } | |
560 } | |
561 | |
562 thread->set_vm_result(exception()); | |
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563 // Set flag if return address is a method handle call site. |
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564 thread->set_is_method_handle_return(nm->is_method_handle_return(pc)); |
0 | 565 |
566 if (TraceExceptions) { | |
567 ttyLocker ttyl; | |
568 ResourceMark rm; | |
569 tty->print_cr("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT " for exception thrown at PC " PTR_FORMAT, | |
570 thread, continuation, pc); | |
571 } | |
572 | |
573 return continuation; | |
574 JRT_END | |
575 | |
576 // Enter this method from compiled code only if there is a Java exception handler | |
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577 // in the method handling the exception. |
0 | 578 // We are entering here from exception stub. We don't do a normal VM transition here. |
579 // We do it in a helper. This is so we can check to see if the nmethod we have just | |
580 // searched for an exception handler has been deoptimized in the meantime. | |
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581 address Runtime1::exception_handler_for_pc(JavaThread* thread) { |
0 | 582 oop exception = thread->exception_oop(); |
583 address pc = thread->exception_pc(); | |
584 // Still in Java mode | |
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585 DEBUG_ONLY(ResetNoHandleMark rnhm); |
0 | 586 nmethod* nm = NULL; |
587 address continuation = NULL; | |
588 { | |
589 // Enter VM mode by calling the helper | |
590 ResetNoHandleMark rnhm; | |
591 continuation = exception_handler_for_pc_helper(thread, exception, pc, nm); | |
592 } | |
593 // Back in JAVA, use no oops DON'T safepoint | |
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594 |
0 | 595 // Now check to see if the nmethod we were called from is now deoptimized. |
596 // If so we must return to the deopt blob and deoptimize the nmethod | |
597 if (nm != NULL && caller_is_deopted()) { | |
598 continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls(); | |
599 } | |
600 | |
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601 assert(continuation != NULL, "no handler found"); |
0 | 602 return continuation; |
603 } | |
604 | |
605 | |
606 JRT_ENTRY(void, Runtime1::throw_range_check_exception(JavaThread* thread, int index)) | |
607 NOT_PRODUCT(_throw_range_check_exception_count++;) | |
608 char message[jintAsStringSize]; | |
609 sprintf(message, "%d", index); | |
610 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), message); | |
611 JRT_END | |
612 | |
613 | |
614 JRT_ENTRY(void, Runtime1::throw_index_exception(JavaThread* thread, int index)) | |
615 NOT_PRODUCT(_throw_index_exception_count++;) | |
616 char message[16]; | |
617 sprintf(message, "%d", index); | |
618 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IndexOutOfBoundsException(), message); | |
619 JRT_END | |
620 | |
621 | |
622 JRT_ENTRY(void, Runtime1::throw_div0_exception(JavaThread* thread)) | |
623 NOT_PRODUCT(_throw_div0_exception_count++;) | |
624 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArithmeticException(), "/ by zero"); | |
625 JRT_END | |
626 | |
627 | |
628 JRT_ENTRY(void, Runtime1::throw_null_pointer_exception(JavaThread* thread)) | |
629 NOT_PRODUCT(_throw_null_pointer_exception_count++;) | |
630 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
631 JRT_END | |
632 | |
633 | |
634 JRT_ENTRY(void, Runtime1::throw_class_cast_exception(JavaThread* thread, oopDesc* object)) | |
635 NOT_PRODUCT(_throw_class_cast_exception_count++;) | |
636 ResourceMark rm(thread); | |
637 char* message = SharedRuntime::generate_class_cast_message( | |
638 thread, Klass::cast(object->klass())->external_name()); | |
639 SharedRuntime::throw_and_post_jvmti_exception( | |
640 thread, vmSymbols::java_lang_ClassCastException(), message); | |
641 JRT_END | |
642 | |
643 | |
644 JRT_ENTRY(void, Runtime1::throw_incompatible_class_change_error(JavaThread* thread)) | |
645 NOT_PRODUCT(_throw_incompatible_class_change_error_count++;) | |
646 ResourceMark rm(thread); | |
647 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IncompatibleClassChangeError()); | |
648 JRT_END | |
649 | |
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650 #ifdef GRAAL |
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651 JRT_ENTRY_NO_ASYNC(void, Runtime1::graal_monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock)) |
0 | 652 NOT_PRODUCT(_monitorenter_slowcase_cnt++;) |
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653 #ifdef ASSERT |
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654 if (TraceGraal >= 3) { |
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655 tty->print_cr("entered locking slow case with obj=" INTPTR_FORMAT " and lock= " INTPTR_FORMAT, obj, lock); |
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656 } |
0 | 657 if (PrintBiasedLockingStatistics) { |
658 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
659 } | |
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660 #endif |
0 | 661 Handle h_obj(thread, obj); |
662 assert(h_obj()->is_oop(), "must be NULL or an object"); | |
663 if (UseBiasedLocking) { | |
664 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
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665 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK); |
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666 } else { |
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667 if (UseFastLocking) { |
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668 // When using fast locking, the compiled code has already tried the fast case |
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669 ObjectSynchronizer::slow_enter(h_obj, lock, THREAD); |
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670 } else { |
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671 ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD); |
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672 } |
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673 } |
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674 #ifdef ASSERT |
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675 if (TraceGraal >= 3) { |
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676 tty->print_cr("exiting locking"); |
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677 tty->print_cr(""); |
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678 tty->print_cr("done"); |
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679 } |
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680 #endif |
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681 JRT_END |
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682 |
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683 |
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684 JRT_LEAF(void, Runtime1::graal_monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock)) |
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685 NOT_PRODUCT(_monitorexit_slowcase_cnt++;) |
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686 assert(thread == JavaThread::current(), "threads must correspond"); |
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687 assert(thread->last_Java_sp(), "last_Java_sp must be set"); |
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688 // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown |
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689 EXCEPTION_MARK; |
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690 |
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691 #ifdef DEBUG |
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692 if (!obj->is_oop()) { |
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693 ResetNoHandleMark rhm; |
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694 nmethod* method = thread->last_frame().cb()->as_nmethod_or_null(); |
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695 if (method != NULL) { |
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696 tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), obj); |
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697 } |
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698 thread->print_stack_on(tty); |
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699 assert(false, "invalid lock object pointer dected"); |
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700 } |
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701 #endif |
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702 |
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703 if (UseFastLocking) { |
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704 // When using fast locking, the compiled code has already tried the fast case |
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705 ObjectSynchronizer::slow_exit(obj, lock, THREAD); |
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706 } else { |
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707 ObjectSynchronizer::fast_exit(obj, lock, THREAD); |
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708 } |
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709 JRT_END |
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710 |
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711 #endif |
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712 |
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713 |
0 | 714 JRT_ENTRY_NO_ASYNC(void, Runtime1::monitorenter(JavaThread* thread, oopDesc* obj, BasicObjectLock* lock)) |
715 NOT_PRODUCT(_monitorenter_slowcase_cnt++;) | |
716 if (PrintBiasedLockingStatistics) { | |
717 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
718 } | |
719 Handle h_obj(thread, obj); | |
720 assert(h_obj()->is_oop(), "must be NULL or an object"); | |
721 if (UseBiasedLocking) { | |
722 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
723 ObjectSynchronizer::fast_enter(h_obj, lock->lock(), true, CHECK); | |
724 } else { | |
725 if (UseFastLocking) { | |
726 // When using fast locking, the compiled code has already tried the fast case | |
727 assert(obj == lock->obj(), "must match"); | |
728 ObjectSynchronizer::slow_enter(h_obj, lock->lock(), THREAD); | |
729 } else { | |
730 lock->set_obj(obj); | |
731 ObjectSynchronizer::fast_enter(h_obj, lock->lock(), false, THREAD); | |
732 } | |
733 } | |
734 JRT_END | |
735 | |
736 | |
737 JRT_LEAF(void, Runtime1::monitorexit(JavaThread* thread, BasicObjectLock* lock)) | |
738 NOT_PRODUCT(_monitorexit_slowcase_cnt++;) | |
739 assert(thread == JavaThread::current(), "threads must correspond"); | |
740 assert(thread->last_Java_sp(), "last_Java_sp must be set"); | |
741 // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown | |
742 EXCEPTION_MARK; | |
743 | |
744 oop obj = lock->obj(); | |
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745 assert(obj->is_oop(), "must be NULL or an object"); |
0 | 746 if (UseFastLocking) { |
747 // When using fast locking, the compiled code has already tried the fast case | |
748 ObjectSynchronizer::slow_exit(obj, lock->lock(), THREAD); | |
749 } else { | |
750 ObjectSynchronizer::fast_exit(obj, lock->lock(), THREAD); | |
751 } | |
752 JRT_END | |
753 | |
4048
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754 // Cf. OptoRuntime::deoptimize_caller_frame |
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755 JRT_ENTRY(void, Runtime1::deoptimize(JavaThread* thread)) |
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756 // Called from within the owner thread, so no need for safepoint |
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757 RegisterMap reg_map(thread, false); |
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758 frame stub_frame = thread->last_frame(); |
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759 assert(stub_frame.is_runtime_frame(), "sanity check"); |
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760 frame caller_frame = stub_frame.sender(®_map); |
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761 |
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762 // We are coming from a compiled method; check this is true. |
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763 assert(CodeCache::find_nmethod(caller_frame.pc()) != NULL, "sanity"); |
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764 |
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765 // Deoptimize the caller frame. |
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766 Deoptimization::deoptimize_frame(thread, caller_frame.id()); |
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767 |
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768 // Return to the now deoptimized frame. |
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769 JRT_END |
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770 |
0 | 771 |
772 static klassOop resolve_field_return_klass(methodHandle caller, int bci, TRAPS) { | |
2142 | 773 Bytecode_field field_access(caller, bci); |
0 | 774 // This can be static or non-static field access |
2142 | 775 Bytecodes::Code code = field_access.code(); |
0 | 776 |
777 // We must load class, initialize class and resolvethe field | |
778 FieldAccessInfo result; // initialize class if needed | |
779 constantPoolHandle constants(THREAD, caller->constants()); | |
2142 | 780 LinkResolver::resolve_field(result, constants, field_access.index(), Bytecodes::java_code(code), false, CHECK_NULL); |
0 | 781 return result.klass()(); |
782 } | |
783 | |
784 | |
785 // | |
786 // This routine patches sites where a class wasn't loaded or | |
787 // initialized at the time the code was generated. It handles | |
788 // references to classes, fields and forcing of initialization. Most | |
789 // of the cases are straightforward and involving simply forcing | |
790 // resolution of a class, rewriting the instruction stream with the | |
791 // needed constant and replacing the call in this function with the | |
792 // patched code. The case for static field is more complicated since | |
793 // the thread which is in the process of initializing a class can | |
794 // access it's static fields but other threads can't so the code | |
795 // either has to deoptimize when this case is detected or execute a | |
796 // check that the current thread is the initializing thread. The | |
797 // current | |
798 // | |
799 // Patches basically look like this: | |
800 // | |
801 // | |
802 // patch_site: jmp patch stub ;; will be patched | |
803 // continue: ... | |
804 // ... | |
805 // ... | |
806 // ... | |
807 // | |
808 // They have a stub which looks like this: | |
809 // | |
810 // ;; patch body | |
811 // movl <const>, reg (for class constants) | |
812 // <or> movl [reg1 + <const>], reg (for field offsets) | |
813 // <or> movl reg, [reg1 + <const>] (for field offsets) | |
814 // <being_init offset> <bytes to copy> <bytes to skip> | |
815 // patch_stub: call Runtime1::patch_code (through a runtime stub) | |
816 // jmp patch_site | |
817 // | |
818 // | |
819 // A normal patch is done by rewriting the patch body, usually a move, | |
820 // and then copying it into place over top of the jmp instruction | |
821 // being careful to flush caches and doing it in an MP-safe way. The | |
822 // constants following the patch body are used to find various pieces | |
823 // of the patch relative to the call site for Runtime1::patch_code. | |
824 // The case for getstatic and putstatic is more complicated because | |
825 // getstatic and putstatic have special semantics when executing while | |
826 // the class is being initialized. getstatic/putstatic on a class | |
827 // which is being_initialized may be executed by the initializing | |
828 // thread but other threads have to block when they execute it. This | |
829 // is accomplished in compiled code by executing a test of the current | |
830 // thread against the initializing thread of the class. It's emitted | |
831 // as boilerplate in their stub which allows the patched code to be | |
832 // executed before it's copied back into the main body of the nmethod. | |
833 // | |
834 // being_init: get_thread(<tmp reg> | |
835 // cmpl [reg1 + <init_thread_offset>], <tmp reg> | |
836 // jne patch_stub | |
837 // movl [reg1 + <const>], reg (for field offsets) <or> | |
838 // movl reg, [reg1 + <const>] (for field offsets) | |
839 // jmp continue | |
840 // <being_init offset> <bytes to copy> <bytes to skip> | |
841 // patch_stub: jmp Runtim1::patch_code (through a runtime stub) | |
842 // jmp patch_site | |
843 // | |
844 // If the class is being initialized the patch body is rewritten and | |
845 // the patch site is rewritten to jump to being_init, instead of | |
846 // patch_stub. Whenever this code is executed it checks the current | |
847 // thread against the intializing thread so other threads will enter | |
848 // the runtime and end up blocked waiting the class to finish | |
849 // initializing inside the calls to resolve_field below. The | |
850 // initializing class will continue on it's way. Once the class is | |
851 // fully_initialized, the intializing_thread of the class becomes | |
852 // NULL, so the next thread to execute this code will fail the test, | |
853 // call into patch_code and complete the patching process by copying | |
854 // the patch body back into the main part of the nmethod and resume | |
855 // executing. | |
856 // | |
857 // | |
858 | |
859 JRT_ENTRY(void, Runtime1::patch_code(JavaThread* thread, Runtime1::StubID stub_id )) | |
860 NOT_PRODUCT(_patch_code_slowcase_cnt++;) | |
861 | |
862 ResourceMark rm(thread); | |
863 RegisterMap reg_map(thread, false); | |
864 frame runtime_frame = thread->last_frame(); | |
865 frame caller_frame = runtime_frame.sender(®_map); | |
866 | |
867 // last java frame on stack | |
868 vframeStream vfst(thread, true); | |
869 assert(!vfst.at_end(), "Java frame must exist"); | |
870 | |
871 methodHandle caller_method(THREAD, vfst.method()); | |
872 // Note that caller_method->code() may not be same as caller_code because of OSR's | |
873 // Note also that in the presence of inlining it is not guaranteed | |
874 // that caller_method() == caller_code->method() | |
875 | |
876 int bci = vfst.bci(); | |
2142 | 877 Bytecodes::Code code = caller_method()->java_code_at(bci); |
0 | 878 |
879 #ifndef PRODUCT | |
880 // this is used by assertions in the access_field_patching_id | |
881 BasicType patch_field_type = T_ILLEGAL; | |
882 #endif // PRODUCT | |
883 bool deoptimize_for_volatile = false; | |
884 int patch_field_offset = -1; | |
885 KlassHandle init_klass(THREAD, klassOop(NULL)); // klass needed by access_field_patching code | |
886 Handle load_klass(THREAD, NULL); // oop needed by load_klass_patching code | |
887 if (stub_id == Runtime1::access_field_patching_id) { | |
888 | |
2142 | 889 Bytecode_field field_access(caller_method, bci); |
0 | 890 FieldAccessInfo result; // initialize class if needed |
2142 | 891 Bytecodes::Code code = field_access.code(); |
0 | 892 constantPoolHandle constants(THREAD, caller_method->constants()); |
2142 | 893 LinkResolver::resolve_field(result, constants, field_access.index(), Bytecodes::java_code(code), false, CHECK); |
0 | 894 patch_field_offset = result.field_offset(); |
895 | |
896 // If we're patching a field which is volatile then at compile it | |
897 // must not have been know to be volatile, so the generated code | |
898 // isn't correct for a volatile reference. The nmethod has to be | |
899 // deoptimized so that the code can be regenerated correctly. | |
900 // This check is only needed for access_field_patching since this | |
901 // is the path for patching field offsets. load_klass is only | |
902 // used for patching references to oops which don't need special | |
903 // handling in the volatile case. | |
904 deoptimize_for_volatile = result.access_flags().is_volatile(); | |
905 | |
906 #ifndef PRODUCT | |
907 patch_field_type = result.field_type(); | |
908 #endif | |
909 } else if (stub_id == Runtime1::load_klass_patching_id) { | |
910 oop k; | |
911 switch (code) { | |
912 case Bytecodes::_putstatic: | |
913 case Bytecodes::_getstatic: | |
914 { klassOop klass = resolve_field_return_klass(caller_method, bci, CHECK); | |
915 // Save a reference to the class that has to be checked for initialization | |
916 init_klass = KlassHandle(THREAD, klass); | |
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917 k = klass->java_mirror(); |
0 | 918 } |
919 break; | |
920 case Bytecodes::_new: | |
2142 | 921 { Bytecode_new bnew(caller_method(), caller_method->bcp_from(bci)); |
922 k = caller_method->constants()->klass_at(bnew.index(), CHECK); | |
0 | 923 } |
924 break; | |
925 case Bytecodes::_multianewarray: | |
2142 | 926 { Bytecode_multianewarray mna(caller_method(), caller_method->bcp_from(bci)); |
927 k = caller_method->constants()->klass_at(mna.index(), CHECK); | |
0 | 928 } |
929 break; | |
930 case Bytecodes::_instanceof: | |
2142 | 931 { Bytecode_instanceof io(caller_method(), caller_method->bcp_from(bci)); |
932 k = caller_method->constants()->klass_at(io.index(), CHECK); | |
0 | 933 } |
934 break; | |
935 case Bytecodes::_checkcast: | |
2142 | 936 { Bytecode_checkcast cc(caller_method(), caller_method->bcp_from(bci)); |
937 k = caller_method->constants()->klass_at(cc.index(), CHECK); | |
0 | 938 } |
939 break; | |
940 case Bytecodes::_anewarray: | |
2142 | 941 { Bytecode_anewarray anew(caller_method(), caller_method->bcp_from(bci)); |
942 klassOop ek = caller_method->constants()->klass_at(anew.index(), CHECK); | |
0 | 943 k = Klass::cast(ek)->array_klass(CHECK); |
944 } | |
945 break; | |
946 case Bytecodes::_ldc: | |
947 case Bytecodes::_ldc_w: | |
948 { | |
2142 | 949 Bytecode_loadconstant cc(caller_method, bci); |
950 k = cc.resolve_constant(CHECK); | |
1602 | 951 assert(k != NULL && !k->is_klass(), "must be class mirror or other Java constant"); |
0 | 952 } |
953 break; | |
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954 default: |
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955 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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956 Unimplemented(); |
0 | 957 } |
958 // convert to handle | |
959 load_klass = Handle(THREAD, k); | |
960 } else { | |
961 ShouldNotReachHere(); | |
962 } | |
963 | |
964 if (deoptimize_for_volatile) { | |
965 // At compile time we assumed the field wasn't volatile but after | |
966 // loading it turns out it was volatile so we have to throw the | |
967 // compiled code out and let it be regenerated. | |
968 if (TracePatching) { | |
969 tty->print_cr("Deoptimizing for patching volatile field reference"); | |
970 } | |
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971 // It's possible the nmethod was invalidated in the last |
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972 // safepoint, but if it's still alive then make it not_entrant. |
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973 nmethod* nm = CodeCache::find_nmethod(caller_frame.pc()); |
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974 if (nm != NULL) { |
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975 nm->make_not_entrant(); |
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976 } |
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977 |
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978 Deoptimization::deoptimize_frame(thread, caller_frame.id()); |
0 | 979 |
980 // Return to the now deoptimized frame. | |
981 } | |
982 | |
1602 | 983 // If we are patching in a non-perm oop, make sure the nmethod |
984 // is on the right list. | |
985 if (ScavengeRootsInCode && load_klass.not_null() && load_klass->is_scavengable()) { | |
986 MutexLockerEx ml_code (CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
987 nmethod* nm = CodeCache::find_nmethod(caller_frame.pc()); | |
988 guarantee(nm != NULL, "only nmethods can contain non-perm oops"); | |
989 if (!nm->on_scavenge_root_list()) | |
990 CodeCache::add_scavenge_root_nmethod(nm); | |
991 } | |
0 | 992 |
993 // Now copy code back | |
994 | |
995 { | |
996 MutexLockerEx ml_patch (Patching_lock, Mutex::_no_safepoint_check_flag); | |
997 // | |
998 // Deoptimization may have happened while we waited for the lock. | |
999 // In that case we don't bother to do any patching we just return | |
1000 // and let the deopt happen | |
1001 if (!caller_is_deopted()) { | |
1002 NativeGeneralJump* jump = nativeGeneralJump_at(caller_frame.pc()); | |
1003 address instr_pc = jump->jump_destination(); | |
1004 NativeInstruction* ni = nativeInstruction_at(instr_pc); | |
1005 if (ni->is_jump() ) { | |
1006 // the jump has not been patched yet | |
1007 // The jump destination is slow case and therefore not part of the stubs | |
1008 // (stubs are only for StaticCalls) | |
1009 | |
1010 // format of buffer | |
1011 // .... | |
1012 // instr byte 0 <-- copy_buff | |
1013 // instr byte 1 | |
1014 // .. | |
1015 // instr byte n-1 | |
1016 // n | |
1017 // .... <-- call destination | |
1018 | |
1019 address stub_location = caller_frame.pc() + PatchingStub::patch_info_offset(); | |
1020 unsigned char* byte_count = (unsigned char*) (stub_location - 1); | |
1021 unsigned char* byte_skip = (unsigned char*) (stub_location - 2); | |
1022 unsigned char* being_initialized_entry_offset = (unsigned char*) (stub_location - 3); | |
1023 address copy_buff = stub_location - *byte_skip - *byte_count; | |
1024 address being_initialized_entry = stub_location - *being_initialized_entry_offset; | |
1025 if (TracePatching) { | |
1026 tty->print_cr(" Patching %s at bci %d at address 0x%x (%s)", Bytecodes::name(code), bci, | |
1027 instr_pc, (stub_id == Runtime1::access_field_patching_id) ? "field" : "klass"); | |
1028 nmethod* caller_code = CodeCache::find_nmethod(caller_frame.pc()); | |
1029 assert(caller_code != NULL, "nmethod not found"); | |
1030 | |
1031 // NOTE we use pc() not original_pc() because we already know they are | |
1032 // identical otherwise we'd have never entered this block of code | |
1033 | |
1034 OopMap* map = caller_code->oop_map_for_return_address(caller_frame.pc()); | |
1035 assert(map != NULL, "null check"); | |
1036 map->print(); | |
1037 tty->cr(); | |
1038 | |
1039 Disassembler::decode(copy_buff, copy_buff + *byte_count, tty); | |
1040 } | |
1041 // depending on the code below, do_patch says whether to copy the patch body back into the nmethod | |
1042 bool do_patch = true; | |
1043 if (stub_id == Runtime1::access_field_patching_id) { | |
1044 // The offset may not be correct if the class was not loaded at code generation time. | |
1045 // Set it now. | |
1046 NativeMovRegMem* n_move = nativeMovRegMem_at(copy_buff); | |
1047 assert(n_move->offset() == 0 || (n_move->offset() == 4 && (patch_field_type == T_DOUBLE || patch_field_type == T_LONG)), "illegal offset for type"); | |
1048 assert(patch_field_offset >= 0, "illegal offset"); | |
1049 n_move->add_offset_in_bytes(patch_field_offset); | |
1050 } else if (stub_id == Runtime1::load_klass_patching_id) { | |
1051 // If a getstatic or putstatic is referencing a klass which | |
1052 // isn't fully initialized, the patch body isn't copied into | |
1053 // place until initialization is complete. In this case the | |
1054 // patch site is setup so that any threads besides the | |
1055 // initializing thread are forced to come into the VM and | |
1056 // block. | |
1057 do_patch = (code != Bytecodes::_getstatic && code != Bytecodes::_putstatic) || | |
1058 instanceKlass::cast(init_klass())->is_initialized(); | |
1059 NativeGeneralJump* jump = nativeGeneralJump_at(instr_pc); | |
1060 if (jump->jump_destination() == being_initialized_entry) { | |
1061 assert(do_patch == true, "initialization must be complete at this point"); | |
1062 } else { | |
1063 // patch the instruction <move reg, klass> | |
1064 NativeMovConstReg* n_copy = nativeMovConstReg_at(copy_buff); | |
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1065 |
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1066 assert(n_copy->data() == 0 || |
1783 | 1067 n_copy->data() == (intptr_t)Universe::non_oop_word(), |
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1068 "illegal init value"); |
0 | 1069 assert(load_klass() != NULL, "klass not set"); |
1070 n_copy->set_data((intx) (load_klass())); | |
1071 | |
1072 if (TracePatching) { | |
1073 Disassembler::decode(copy_buff, copy_buff + *byte_count, tty); | |
1074 } | |
1075 | |
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1076 #if defined(SPARC) || defined(PPC) |
0 | 1077 // Update the oop location in the nmethod with the proper |
1078 // oop. When the code was generated, a NULL was stuffed | |
1079 // in the oop table and that table needs to be update to | |
1080 // have the right value. On intel the value is kept | |
1081 // directly in the instruction instead of in the oop | |
1082 // table, so set_data above effectively updated the value. | |
1083 nmethod* nm = CodeCache::find_nmethod(instr_pc); | |
1084 assert(nm != NULL, "invalid nmethod_pc"); | |
1085 RelocIterator oops(nm, copy_buff, copy_buff + 1); | |
1086 bool found = false; | |
1087 while (oops.next() && !found) { | |
1088 if (oops.type() == relocInfo::oop_type) { | |
1089 oop_Relocation* r = oops.oop_reloc(); | |
1090 oop* oop_adr = r->oop_addr(); | |
1091 *oop_adr = load_klass(); | |
1092 r->fix_oop_relocation(); | |
1093 found = true; | |
1094 } | |
1095 } | |
1096 assert(found, "the oop must exist!"); | |
1097 #endif | |
1098 | |
1099 } | |
1100 } else { | |
1101 ShouldNotReachHere(); | |
1102 } | |
1103 if (do_patch) { | |
1104 // replace instructions | |
1105 // first replace the tail, then the call | |
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1106 #ifdef ARM |
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1107 if(stub_id == Runtime1::load_klass_patching_id && !VM_Version::supports_movw()) { |
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1108 nmethod* nm = CodeCache::find_nmethod(instr_pc); |
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1109 oop* oop_addr = NULL; |
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1110 assert(nm != NULL, "invalid nmethod_pc"); |
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1111 RelocIterator oops(nm, copy_buff, copy_buff + 1); |
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1112 while (oops.next()) { |
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1113 if (oops.type() == relocInfo::oop_type) { |
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1114 oop_Relocation* r = oops.oop_reloc(); |
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1115 oop_addr = r->oop_addr(); |
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1116 break; |
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1117 } |
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1118 } |
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1119 assert(oop_addr != NULL, "oop relocation must exist"); |
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1120 copy_buff -= *byte_count; |
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1121 NativeMovConstReg* n_copy2 = nativeMovConstReg_at(copy_buff); |
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1122 n_copy2->set_pc_relative_offset((address)oop_addr, instr_pc); |
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1123 } |
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1124 #endif |
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1125 |
0 | 1126 for (int i = NativeCall::instruction_size; i < *byte_count; i++) { |
1127 address ptr = copy_buff + i; | |
1128 int a_byte = (*ptr) & 0xFF; | |
1129 address dst = instr_pc + i; | |
1130 *(unsigned char*)dst = (unsigned char) a_byte; | |
1131 } | |
1132 ICache::invalidate_range(instr_pc, *byte_count); | |
1133 NativeGeneralJump::replace_mt_safe(instr_pc, copy_buff); | |
1134 | |
1135 if (stub_id == Runtime1::load_klass_patching_id) { | |
1136 // update relocInfo to oop | |
1137 nmethod* nm = CodeCache::find_nmethod(instr_pc); | |
1138 assert(nm != NULL, "invalid nmethod_pc"); | |
1139 | |
1140 // The old patch site is now a move instruction so update | |
1141 // the reloc info so that it will get updated during | |
1142 // future GCs. | |
1143 RelocIterator iter(nm, (address)instr_pc, (address)(instr_pc + 1)); | |
1144 relocInfo::change_reloc_info_for_address(&iter, (address) instr_pc, | |
1145 relocInfo::none, relocInfo::oop_type); | |
1146 #ifdef SPARC | |
1147 // Sparc takes two relocations for an oop so update the second one. | |
1148 address instr_pc2 = instr_pc + NativeMovConstReg::add_offset; | |
1149 RelocIterator iter2(nm, instr_pc2, instr_pc2 + 1); | |
1150 relocInfo::change_reloc_info_for_address(&iter2, (address) instr_pc2, | |
1151 relocInfo::none, relocInfo::oop_type); | |
1152 #endif | |
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1153 #ifdef PPC |
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1154 { address instr_pc2 = instr_pc + NativeMovConstReg::lo_offset; |
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1155 RelocIterator iter2(nm, instr_pc2, instr_pc2 + 1); |
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1156 relocInfo::change_reloc_info_for_address(&iter2, (address) instr_pc2, relocInfo::none, relocInfo::oop_type); |
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1157 } |
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1158 #endif |
0 | 1159 } |
1160 | |
1161 } else { | |
1162 ICache::invalidate_range(copy_buff, *byte_count); | |
1163 NativeGeneralJump::insert_unconditional(instr_pc, being_initialized_entry); | |
1164 } | |
1165 } | |
1166 } | |
1167 } | |
1168 JRT_END | |
1169 | |
1170 // | |
1171 // Entry point for compiled code. We want to patch a nmethod. | |
1172 // We don't do a normal VM transition here because we want to | |
1173 // know after the patching is complete and any safepoint(s) are taken | |
1174 // if the calling nmethod was deoptimized. We do this by calling a | |
1175 // helper method which does the normal VM transition and when it | |
1176 // completes we can check for deoptimization. This simplifies the | |
1177 // assembly code in the cpu directories. | |
1178 // | |
1179 int Runtime1::move_klass_patching(JavaThread* thread) { | |
1180 // | |
1181 // NOTE: we are still in Java | |
1182 // | |
1183 Thread* THREAD = thread; | |
1184 debug_only(NoHandleMark nhm;) | |
1185 { | |
1186 // Enter VM mode | |
1187 | |
1188 ResetNoHandleMark rnhm; | |
1189 patch_code(thread, load_klass_patching_id); | |
1190 } | |
1191 // Back in JAVA, use no oops DON'T safepoint | |
1192 | |
1193 // Return true if calling code is deoptimized | |
1194 | |
1195 return caller_is_deopted(); | |
1196 } | |
1197 | |
1198 // | |
1199 // Entry point for compiled code. We want to patch a nmethod. | |
1200 // We don't do a normal VM transition here because we want to | |
1201 // know after the patching is complete and any safepoint(s) are taken | |
1202 // if the calling nmethod was deoptimized. We do this by calling a | |
1203 // helper method which does the normal VM transition and when it | |
1204 // completes we can check for deoptimization. This simplifies the | |
1205 // assembly code in the cpu directories. | |
1206 // | |
1207 | |
1208 int Runtime1::access_field_patching(JavaThread* thread) { | |
1209 // | |
1210 // NOTE: we are still in Java | |
1211 // | |
1212 Thread* THREAD = thread; | |
1213 debug_only(NoHandleMark nhm;) | |
1214 { | |
1215 // Enter VM mode | |
1216 | |
1217 ResetNoHandleMark rnhm; | |
1218 patch_code(thread, access_field_patching_id); | |
1219 } | |
1220 // Back in JAVA, use no oops DON'T safepoint | |
1221 | |
1222 // Return true if calling code is deoptimized | |
1223 | |
1224 return caller_is_deopted(); | |
1225 JRT_END | |
1226 | |
1227 | |
1228 JRT_LEAF(void, Runtime1::trace_block_entry(jint block_id)) | |
1229 // for now we just print out the block id | |
1230 tty->print("%d ", block_id); | |
1231 JRT_END | |
1232 | |
1233 | |
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1234 // Array copy return codes. |
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1235 enum { |
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1236 ac_failed = -1, // arraycopy failed |
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1237 ac_ok = 0 // arraycopy succeeded |
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1238 }; |
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1239 |
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1240 |
1245
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1241 // Below length is the # elements copied. |
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1242 template <class T> int obj_arraycopy_work(oopDesc* src, T* src_addr, |
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1243 oopDesc* dst, T* dst_addr, |
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1244 int length) { |
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1245 |
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1246 // For performance reasons, we assume we are using a card marking write |
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1247 // barrier. The assert will fail if this is not the case. |
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1248 // Note that we use the non-virtual inlineable variant of write_ref_array. |
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1249 BarrierSet* bs = Universe::heap()->barrier_set(); |
1245
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1250 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); |
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1251 assert(bs->has_write_ref_array_pre_opt(), "For pre-barrier as well."); |
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1252 if (src == dst) { |
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1253 // same object, no check |
1245
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1254 bs->write_ref_array_pre(dst_addr, length); |
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1255 Copy::conjoint_oops_atomic(src_addr, dst_addr, length); |
1245
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1256 bs->write_ref_array((HeapWord*)dst_addr, length); |
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1257 return ac_ok; |
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1258 } else { |
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1259 klassOop bound = objArrayKlass::cast(dst->klass())->element_klass(); |
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1260 klassOop stype = objArrayKlass::cast(src->klass())->element_klass(); |
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1261 if (stype == bound || Klass::cast(stype)->is_subtype_of(bound)) { |
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1262 // Elements are guaranteed to be subtypes, so no check necessary |
1245
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1263 bs->write_ref_array_pre(dst_addr, length); |
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1264 Copy::conjoint_oops_atomic(src_addr, dst_addr, length); |
1245
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1265 bs->write_ref_array((HeapWord*)dst_addr, length); |
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1266 return ac_ok; |
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1267 } |
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1268 } |
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1269 return ac_failed; |
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1270 } |
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1271 |
0 | 1272 // fast and direct copy of arrays; returning -1, means that an exception may be thrown |
1273 // and we did not copy anything | |
1274 JRT_LEAF(int, Runtime1::arraycopy(oopDesc* src, int src_pos, oopDesc* dst, int dst_pos, int length)) | |
1275 #ifndef PRODUCT | |
1276 _generic_arraycopy_cnt++; // Slow-path oop array copy | |
1277 #endif | |
1278 | |
1279 if (src == NULL || dst == NULL || src_pos < 0 || dst_pos < 0 || length < 0) return ac_failed; | |
1280 if (!dst->is_array() || !src->is_array()) return ac_failed; | |
1281 if ((unsigned int) arrayOop(src)->length() < (unsigned int)src_pos + (unsigned int)length) return ac_failed; | |
1282 if ((unsigned int) arrayOop(dst)->length() < (unsigned int)dst_pos + (unsigned int)length) return ac_failed; | |
1283 | |
1284 if (length == 0) return ac_ok; | |
1285 if (src->is_typeArray()) { | |
1286 const klassOop klass_oop = src->klass(); | |
1287 if (klass_oop != dst->klass()) return ac_failed; | |
1288 typeArrayKlass* klass = typeArrayKlass::cast(klass_oop); | |
1289 const int l2es = klass->log2_element_size(); | |
1290 const int ihs = klass->array_header_in_bytes() / wordSize; | |
1291 char* src_addr = (char*) ((oopDesc**)src + ihs) + (src_pos << l2es); | |
1292 char* dst_addr = (char*) ((oopDesc**)dst + ihs) + (dst_pos << l2es); | |
1293 // Potential problem: memmove is not guaranteed to be word atomic | |
1294 // Revisit in Merlin | |
1295 memmove(dst_addr, src_addr, length << l2es); | |
1296 return ac_ok; | |
1297 } else if (src->is_objArray() && dst->is_objArray()) { | |
2002 | 1298 if (UseCompressedOops) { |
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1299 narrowOop *src_addr = objArrayOop(src)->obj_at_addr<narrowOop>(src_pos); |
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1300 narrowOop *dst_addr = objArrayOop(dst)->obj_at_addr<narrowOop>(dst_pos); |
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1301 return obj_arraycopy_work(src, src_addr, dst, dst_addr, length); |
0 | 1302 } else { |
113
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1303 oop *src_addr = objArrayOop(src)->obj_at_addr<oop>(src_pos); |
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1304 oop *dst_addr = objArrayOop(dst)->obj_at_addr<oop>(dst_pos); |
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1305 return obj_arraycopy_work(src, src_addr, dst, dst_addr, length); |
0 | 1306 } |
1307 } | |
1308 return ac_failed; | |
1309 JRT_END | |
1310 | |
1311 | |
1312 JRT_LEAF(void, Runtime1::primitive_arraycopy(HeapWord* src, HeapWord* dst, int length)) | |
1313 #ifndef PRODUCT | |
1314 _primitive_arraycopy_cnt++; | |
1315 #endif | |
1316 | |
1317 if (length == 0) return; | |
1318 // Not guaranteed to be word atomic, but that doesn't matter | |
1319 // for anything but an oop array, which is covered by oop_arraycopy. | |
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1320 Copy::conjoint_jbytes(src, dst, length); |
0 | 1321 JRT_END |
1322 | |
1323 JRT_LEAF(void, Runtime1::oop_arraycopy(HeapWord* src, HeapWord* dst, int num)) | |
1324 #ifndef PRODUCT | |
1325 _oop_arraycopy_cnt++; | |
1326 #endif | |
1327 | |
1328 if (num == 0) return; | |
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1329 BarrierSet* bs = Universe::heap()->barrier_set(); |
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1330 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); |
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1331 assert(bs->has_write_ref_array_pre_opt(), "For pre-barrier as well."); |
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1332 if (UseCompressedOops) { |
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1333 bs->write_ref_array_pre((narrowOop*)dst, num); |
2002 | 1334 Copy::conjoint_oops_atomic((narrowOop*) src, (narrowOop*) dst, num); |
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1335 } else { |
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1336 bs->write_ref_array_pre((oop*)dst, num); |
2002 | 1337 Copy::conjoint_oops_atomic((oop*) src, (oop*) dst, num); |
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1338 } |
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1339 bs->write_ref_array(dst, num); |
0 | 1340 JRT_END |
1341 | |
1342 | |
1343 #ifndef PRODUCT | |
1344 void Runtime1::print_statistics() { | |
1345 tty->print_cr("C1 Runtime statistics:"); | |
1346 tty->print_cr(" _resolve_invoke_virtual_cnt: %d", SharedRuntime::_resolve_virtual_ctr); | |
1347 tty->print_cr(" _resolve_invoke_opt_virtual_cnt: %d", SharedRuntime::_resolve_opt_virtual_ctr); | |
1348 tty->print_cr(" _resolve_invoke_static_cnt: %d", SharedRuntime::_resolve_static_ctr); | |
1349 tty->print_cr(" _handle_wrong_method_cnt: %d", SharedRuntime::_wrong_method_ctr); | |
1350 tty->print_cr(" _ic_miss_cnt: %d", SharedRuntime::_ic_miss_ctr); | |
1351 tty->print_cr(" _generic_arraycopy_cnt: %d", _generic_arraycopy_cnt); | |
2446 | 1352 tty->print_cr(" _generic_arraycopystub_cnt: %d", _generic_arraycopystub_cnt); |
1353 tty->print_cr(" _byte_arraycopy_cnt: %d", _byte_arraycopy_cnt); | |
1354 tty->print_cr(" _short_arraycopy_cnt: %d", _short_arraycopy_cnt); | |
1355 tty->print_cr(" _int_arraycopy_cnt: %d", _int_arraycopy_cnt); | |
1356 tty->print_cr(" _long_arraycopy_cnt: %d", _long_arraycopy_cnt); | |
0 | 1357 tty->print_cr(" _primitive_arraycopy_cnt: %d", _primitive_arraycopy_cnt); |
2446 | 1358 tty->print_cr(" _oop_arraycopy_cnt (C): %d", Runtime1::_oop_arraycopy_cnt); |
1359 tty->print_cr(" _oop_arraycopy_cnt (stub): %d", _oop_arraycopy_cnt); | |
0 | 1360 tty->print_cr(" _arraycopy_slowcase_cnt: %d", _arraycopy_slowcase_cnt); |
2446 | 1361 tty->print_cr(" _arraycopy_checkcast_cnt: %d", _arraycopy_checkcast_cnt); |
1362 tty->print_cr(" _arraycopy_checkcast_attempt_cnt:%d", _arraycopy_checkcast_attempt_cnt); | |
0 | 1363 |
1364 tty->print_cr(" _new_type_array_slowcase_cnt: %d", _new_type_array_slowcase_cnt); | |
1365 tty->print_cr(" _new_object_array_slowcase_cnt: %d", _new_object_array_slowcase_cnt); | |
1366 tty->print_cr(" _new_instance_slowcase_cnt: %d", _new_instance_slowcase_cnt); | |
1367 tty->print_cr(" _new_multi_array_slowcase_cnt: %d", _new_multi_array_slowcase_cnt); | |
1368 tty->print_cr(" _monitorenter_slowcase_cnt: %d", _monitorenter_slowcase_cnt); | |
1369 tty->print_cr(" _monitorexit_slowcase_cnt: %d", _monitorexit_slowcase_cnt); | |
1370 tty->print_cr(" _patch_code_slowcase_cnt: %d", _patch_code_slowcase_cnt); | |
1371 | |
1372 tty->print_cr(" _throw_range_check_exception_count: %d:", _throw_range_check_exception_count); | |
1373 tty->print_cr(" _throw_index_exception_count: %d:", _throw_index_exception_count); | |
1374 tty->print_cr(" _throw_div0_exception_count: %d:", _throw_div0_exception_count); | |
1375 tty->print_cr(" _throw_null_pointer_exception_count: %d:", _throw_null_pointer_exception_count); | |
1376 tty->print_cr(" _throw_class_cast_exception_count: %d:", _throw_class_cast_exception_count); | |
1377 tty->print_cr(" _throw_incompatible_class_change_error_count: %d:", _throw_incompatible_class_change_error_count); | |
1378 tty->print_cr(" _throw_array_store_exception_count: %d:", _throw_array_store_exception_count); | |
1379 tty->print_cr(" _throw_count: %d:", _throw_count); | |
1380 | |
1381 SharedRuntime::print_ic_miss_histogram(); | |
1382 tty->cr(); | |
1383 } | |
1384 #endif // PRODUCT |