Mercurial > hg > truffle
annotate src/share/vm/interpreter/interpreter.cpp @ 7378:88506cfc3bab
Canonicalize ((a - a % b) / b) into (a / b).
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Tue, 15 Jan 2013 17:53:31 +0100 |
parents | 291ffc492eb6 |
children | b8f261ba79c6 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "asm/macroAssembler.hpp" |
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27 #include "asm/macroAssembler.inline.hpp" |
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28 #include "compiler/disassembler.hpp" |
1972 | 29 #include "interpreter/bytecodeHistogram.hpp" |
30 #include "interpreter/bytecodeInterpreter.hpp" | |
31 #include "interpreter/interpreter.hpp" | |
32 #include "interpreter/interpreterRuntime.hpp" | |
33 #include "interpreter/templateTable.hpp" | |
34 #include "memory/allocation.inline.hpp" | |
35 #include "memory/resourceArea.hpp" | |
36 #include "oops/arrayOop.hpp" | |
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37 #include "oops/methodData.hpp" |
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38 #include "oops/method.hpp" |
1972 | 39 #include "oops/oop.inline.hpp" |
40 #include "prims/forte.hpp" | |
41 #include "prims/jvmtiExport.hpp" | |
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42 #include "prims/methodHandles.hpp" |
1972 | 43 #include "runtime/handles.inline.hpp" |
44 #include "runtime/sharedRuntime.hpp" | |
45 #include "runtime/stubRoutines.hpp" | |
46 #include "runtime/timer.hpp" | |
0 | 47 |
48 # define __ _masm-> | |
49 | |
50 | |
51 //------------------------------------------------------------------------------------------------------------------------ | |
52 // Implementation of InterpreterCodelet | |
53 | |
54 void InterpreterCodelet::initialize(const char* description, Bytecodes::Code bytecode) { | |
55 _description = description; | |
56 _bytecode = bytecode; | |
57 } | |
58 | |
59 | |
60 void InterpreterCodelet::verify() { | |
61 } | |
62 | |
63 | |
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64 void InterpreterCodelet::print_on(outputStream* st) const { |
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65 ttyLocker ttyl; |
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66 if (PrintInterpreter || PrintMachineCodeToFile) { |
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67 |
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68 st->print_cr("----------------------------------------------------------------------"); |
0 | 69 } |
70 | |
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71 if (description() != NULL) st->print("%s ", description()); |
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72 if (bytecode() >= 0 ) st->print("%d %s ", bytecode(), Bytecodes::name(bytecode())); |
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73 st->print_cr("[" INTPTR_FORMAT ", " INTPTR_FORMAT "] %d bytes", |
0 | 74 code_begin(), code_end(), code_size()); |
75 | |
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76 if (PrintInterpreter || PrintMachineCodeToFile) { |
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77 Disassembler::decode(code_begin(), code_end(), st, DEBUG_ONLY(_comments) NOT_DEBUG(CodeComments())); |
0 | 78 } |
79 } | |
80 | |
81 | |
82 //------------------------------------------------------------------------------------------------------------------------ | |
83 // Implementation of platform independent aspects of Interpreter | |
84 | |
85 void AbstractInterpreter::initialize() { | |
86 if (_code != NULL) return; | |
87 | |
88 // make sure 'imported' classes are initialized | |
89 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) BytecodeCounter::reset(); | |
90 if (PrintBytecodeHistogram) BytecodeHistogram::reset(); | |
91 if (PrintBytecodePairHistogram) BytecodePairHistogram::reset(); | |
92 | |
93 InvocationCounter::reinitialize(DelayCompilationDuringStartup); | |
94 | |
95 } | |
96 | |
97 void AbstractInterpreter::print() { | |
98 tty->cr(); | |
99 tty->print_cr("----------------------------------------------------------------------"); | |
100 tty->print_cr("Interpreter"); | |
101 tty->cr(); | |
102 tty->print_cr("code size = %6dK bytes", (int)_code->used_space()/1024); | |
103 tty->print_cr("total space = %6dK bytes", (int)_code->total_space()/1024); | |
104 tty->print_cr("wasted space = %6dK bytes", (int)_code->available_space()/1024); | |
105 tty->cr(); | |
106 tty->print_cr("# of codelets = %6d" , _code->number_of_stubs()); | |
107 tty->print_cr("avg codelet size = %6d bytes", _code->used_space() / _code->number_of_stubs()); | |
108 tty->cr(); | |
109 _code->print(); | |
110 tty->print_cr("----------------------------------------------------------------------"); | |
111 tty->cr(); | |
112 } | |
113 | |
114 | |
115 void interpreter_init() { | |
116 Interpreter::initialize(); | |
117 #ifndef PRODUCT | |
118 if (TraceBytecodes) BytecodeTracer::set_closure(BytecodeTracer::std_closure()); | |
119 #endif // PRODUCT | |
120 // need to hit every safepoint in order to call zapping routine | |
121 // register the interpreter | |
122 Forte::register_stub( | |
123 "Interpreter", | |
124 AbstractInterpreter::code()->code_start(), | |
125 AbstractInterpreter::code()->code_end() | |
126 ); | |
127 | |
128 // notify JVMTI profiler | |
129 if (JvmtiExport::should_post_dynamic_code_generated()) { | |
130 JvmtiExport::post_dynamic_code_generated("Interpreter", | |
131 AbstractInterpreter::code()->code_start(), | |
132 AbstractInterpreter::code()->code_end()); | |
133 } | |
134 } | |
135 | |
136 //------------------------------------------------------------------------------------------------------------------------ | |
137 // Implementation of interpreter | |
138 | |
139 StubQueue* AbstractInterpreter::_code = NULL; | |
140 bool AbstractInterpreter::_notice_safepoints = false; | |
141 address AbstractInterpreter::_rethrow_exception_entry = NULL; | |
142 | |
143 address AbstractInterpreter::_native_entry_begin = NULL; | |
144 address AbstractInterpreter::_native_entry_end = NULL; | |
145 address AbstractInterpreter::_slow_signature_handler; | |
146 address AbstractInterpreter::_entry_table [AbstractInterpreter::number_of_method_entries]; | |
147 address AbstractInterpreter::_native_abi_to_tosca [AbstractInterpreter::number_of_result_handlers]; | |
148 | |
149 //------------------------------------------------------------------------------------------------------------------------ | |
150 // Generation of complete interpreter | |
151 | |
152 AbstractInterpreterGenerator::AbstractInterpreterGenerator(StubQueue* _code) { | |
153 _masm = NULL; | |
154 } | |
155 | |
156 | |
157 static const BasicType types[Interpreter::number_of_result_handlers] = { | |
158 T_BOOLEAN, | |
159 T_CHAR , | |
160 T_BYTE , | |
161 T_SHORT , | |
162 T_INT , | |
163 T_LONG , | |
164 T_VOID , | |
165 T_FLOAT , | |
166 T_DOUBLE , | |
167 T_OBJECT | |
168 }; | |
169 | |
170 void AbstractInterpreterGenerator::generate_all() { | |
171 | |
172 | |
173 { CodeletMark cm(_masm, "slow signature handler"); | |
174 Interpreter::_slow_signature_handler = generate_slow_signature_handler(); | |
175 } | |
176 | |
177 } | |
178 | |
179 //------------------------------------------------------------------------------------------------------------------------ | |
180 // Entry points | |
181 | |
182 AbstractInterpreter::MethodKind AbstractInterpreter::method_kind(methodHandle m) { | |
183 // Abstract method? | |
184 if (m->is_abstract()) return abstract; | |
185 | |
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186 // Method handle primitive? |
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187 if (m->is_method_handle_intrinsic()) { |
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188 vmIntrinsics::ID id = m->intrinsic_id(); |
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189 assert(MethodHandles::is_signature_polymorphic(id), "must match an intrinsic"); |
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190 MethodKind kind = (MethodKind)( method_handle_invoke_FIRST + |
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191 ((int)id - vmIntrinsics::FIRST_MH_SIG_POLY) ); |
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192 assert(kind <= method_handle_invoke_LAST, "parallel enum ranges"); |
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193 return kind; |
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194 } |
710 | 195 |
0 | 196 // Native method? |
197 // Note: This test must come _before_ the test for intrinsic | |
198 // methods. See also comments below. | |
199 if (m->is_native()) { | |
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200 assert(!m->is_method_handle_intrinsic(), "overlapping bits here, watch out"); |
0 | 201 return m->is_synchronized() ? native_synchronized : native; |
202 } | |
203 | |
204 // Synchronized? | |
205 if (m->is_synchronized()) { | |
206 return zerolocals_synchronized; | |
207 } | |
208 | |
209 if (RegisterFinalizersAtInit && m->code_size() == 1 && | |
210 m->intrinsic_id() == vmIntrinsics::_Object_init) { | |
211 // We need to execute the special return bytecode to check for | |
212 // finalizer registration so create a normal frame. | |
213 return zerolocals; | |
214 } | |
215 | |
216 // Empty method? | |
217 if (m->is_empty_method()) { | |
218 return empty; | |
219 } | |
220 | |
221 // Special intrinsic method? | |
222 // Note: This test must come _after_ the test for native methods, | |
223 // otherwise we will run into problems with JDK 1.2, see also | |
224 // AbstractInterpreterGenerator::generate_method_entry() for | |
225 // for details. | |
226 switch (m->intrinsic_id()) { | |
227 case vmIntrinsics::_dsin : return java_lang_math_sin ; | |
228 case vmIntrinsics::_dcos : return java_lang_math_cos ; | |
229 case vmIntrinsics::_dtan : return java_lang_math_tan ; | |
230 case vmIntrinsics::_dabs : return java_lang_math_abs ; | |
231 case vmIntrinsics::_dsqrt : return java_lang_math_sqrt ; | |
232 case vmIntrinsics::_dlog : return java_lang_math_log ; | |
233 case vmIntrinsics::_dlog10: return java_lang_math_log10; | |
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234 case vmIntrinsics::_dpow : return java_lang_math_pow ; |
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235 case vmIntrinsics::_dexp : return java_lang_math_exp ; |
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236 |
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237 case vmIntrinsics::_Reference_get: |
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238 return java_lang_ref_reference_get; |
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239 } |
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240 |
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241 // Accessor method? |
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242 if (m->is_accessor()) { |
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243 assert(m->size_of_parameters() == 1, "fast code for accessors assumes parameter size = 1"); |
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244 return accessor; |
0 | 245 } |
246 | |
247 // Note: for now: zero locals for all non-empty methods | |
248 return zerolocals; | |
249 } | |
250 | |
251 | |
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252 void AbstractInterpreter::set_entry_for_kind(AbstractInterpreter::MethodKind kind, address entry) { |
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253 assert(kind >= method_handle_invoke_FIRST && |
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254 kind <= method_handle_invoke_LAST, "late initialization only for MH entry points"); |
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255 assert(_entry_table[kind] == _entry_table[abstract], "previous value must be AME entry"); |
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256 _entry_table[kind] = entry; |
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257 } |
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258 |
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259 |
0 | 260 // Return true if the interpreter can prove that the given bytecode has |
261 // not yet been executed (in Java semantics, not in actual operation). | |
262 bool AbstractInterpreter::is_not_reached(methodHandle method, int bci) { | |
2142 | 263 Bytecodes::Code code = method()->code_at(bci); |
0 | 264 |
2142 | 265 if (!Bytecodes::must_rewrite(code)) { |
0 | 266 // might have been reached |
267 return false; | |
268 } | |
269 | |
270 // the bytecode might not be rewritten if the method is an accessor, etc. | |
271 address ientry = method->interpreter_entry(); | |
272 if (ientry != entry_for_kind(AbstractInterpreter::zerolocals) && | |
273 ientry != entry_for_kind(AbstractInterpreter::zerolocals_synchronized)) | |
274 return false; // interpreter does not run this method! | |
275 | |
276 // otherwise, we can be sure this bytecode has never been executed | |
277 return true; | |
278 } | |
279 | |
280 | |
281 #ifndef PRODUCT | |
282 void AbstractInterpreter::print_method_kind(MethodKind kind) { | |
283 switch (kind) { | |
284 case zerolocals : tty->print("zerolocals" ); break; | |
285 case zerolocals_synchronized: tty->print("zerolocals_synchronized"); break; | |
286 case native : tty->print("native" ); break; | |
287 case native_synchronized : tty->print("native_synchronized" ); break; | |
288 case empty : tty->print("empty" ); break; | |
289 case accessor : tty->print("accessor" ); break; | |
290 case abstract : tty->print("abstract" ); break; | |
291 case java_lang_math_sin : tty->print("java_lang_math_sin" ); break; | |
292 case java_lang_math_cos : tty->print("java_lang_math_cos" ); break; | |
293 case java_lang_math_tan : tty->print("java_lang_math_tan" ); break; | |
294 case java_lang_math_abs : tty->print("java_lang_math_abs" ); break; | |
295 case java_lang_math_sqrt : tty->print("java_lang_math_sqrt" ); break; | |
296 case java_lang_math_log : tty->print("java_lang_math_log" ); break; | |
297 case java_lang_math_log10 : tty->print("java_lang_math_log10" ); break; | |
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298 default: |
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299 if (kind >= method_handle_invoke_FIRST && |
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300 kind <= method_handle_invoke_LAST) { |
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301 const char* kind_name = vmIntrinsics::name_at(method_handle_intrinsic(kind)); |
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302 if (kind_name[0] == '_') kind_name = &kind_name[1]; // '_invokeExact' => 'invokeExact' |
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303 tty->print("method_handle_%s", kind_name); |
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304 break; |
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305 } |
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306 ShouldNotReachHere(); |
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307 break; |
0 | 308 } |
309 } | |
310 #endif // PRODUCT | |
311 | |
312 | |
313 //------------------------------------------------------------------------------------------------------------------------ | |
314 // Deoptimization support | |
315 | |
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316 // If deoptimization happens, this function returns the point of next bytecode to continue execution |
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317 address AbstractInterpreter::deopt_continue_after_entry(Method* method, address bcp, int callee_parameters, bool is_top_frame) { |
0 | 318 assert(method->contains(bcp), "just checkin'"); |
2142 | 319 Bytecodes::Code code = Bytecodes::java_code_at(method, bcp); |
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320 assert(!Interpreter::bytecode_should_reexecute(code), "should not reexecute"); |
0 | 321 int bci = method->bci_from(bcp); |
322 int length = -1; // initial value for debugging | |
323 // compute continuation length | |
2142 | 324 length = Bytecodes::length_at(method, bcp); |
0 | 325 // compute result type |
326 BasicType type = T_ILLEGAL; | |
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327 |
0 | 328 switch (code) { |
329 case Bytecodes::_invokevirtual : | |
330 case Bytecodes::_invokespecial : | |
331 case Bytecodes::_invokestatic : | |
332 case Bytecodes::_invokeinterface: { | |
333 Thread *thread = Thread::current(); | |
334 ResourceMark rm(thread); | |
335 methodHandle mh(thread, method); | |
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336 type = Bytecode_invoke(mh, bci).result_type(); |
0 | 337 // since the cache entry might not be initialized: |
338 // (NOT needed for the old calling convension) | |
339 if (!is_top_frame) { | |
340 int index = Bytes::get_native_u2(bcp+1); | |
341 method->constants()->cache()->entry_at(index)->set_parameter_size(callee_parameters); | |
342 } | |
343 break; | |
344 } | |
345 | |
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346 case Bytecodes::_invokedynamic: { |
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347 Thread *thread = Thread::current(); |
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348 ResourceMark rm(thread); |
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349 methodHandle mh(thread, method); |
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350 type = Bytecode_invoke(mh, bci).result_type(); |
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351 // since the cache entry might not be initialized: |
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352 // (NOT needed for the old calling convension) |
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353 if (!is_top_frame) { |
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354 int index = Bytes::get_native_u4(bcp+1); |
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355 method->constants()->invokedynamic_cp_cache_entry_at(index)->set_parameter_size(callee_parameters); |
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356 } |
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357 break; |
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358 } |
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359 |
0 | 360 case Bytecodes::_ldc : |
361 case Bytecodes::_ldc_w : // fall through | |
362 case Bytecodes::_ldc2_w: | |
1602 | 363 { |
364 Thread *thread = Thread::current(); | |
365 ResourceMark rm(thread); | |
366 methodHandle mh(thread, method); | |
2142 | 367 type = Bytecode_loadconstant(mh, bci).result_type(); |
1602 | 368 break; |
369 } | |
0 | 370 |
371 default: | |
372 type = Bytecodes::result_type(code); | |
373 break; | |
374 } | |
375 | |
376 // return entry point for computed continuation state & bytecode length | |
377 return | |
378 is_top_frame | |
379 ? Interpreter::deopt_entry (as_TosState(type), length) | |
380 : Interpreter::return_entry(as_TosState(type), length); | |
381 } | |
382 | |
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383 // If deoptimization happens, this function returns the point where the interpreter reexecutes |
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384 // the bytecode. |
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385 // Note: Bytecodes::_athrow is a special case in that it does not return |
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386 // Interpreter::deopt_entry(vtos, 0) like others |
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387 address AbstractInterpreter::deopt_reexecute_entry(Method* method, address bcp) { |
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388 assert(method->contains(bcp), "just checkin'"); |
2142 | 389 Bytecodes::Code code = Bytecodes::java_code_at(method, bcp); |
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390 #if defined(COMPILER1) || defined(GRAAL) |
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391 |
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392 if(code == Bytecodes::_athrow ) { |
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393 return Interpreter::rethrow_exception_entry(); |
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394 } |
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395 #endif /* COMPILER1 */ |
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396 return Interpreter::deopt_entry(vtos, 0); |
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397 } |
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398 |
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399 // If deoptimization happens, the interpreter should reexecute these bytecodes. |
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400 // This function mainly helps the compilers to set up the reexecute bit. |
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401 bool AbstractInterpreter::bytecode_should_reexecute(Bytecodes::Code code) { |
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402 switch (code) { |
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403 case Bytecodes::_lookupswitch: |
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404 case Bytecodes::_tableswitch: |
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405 case Bytecodes::_fast_binaryswitch: |
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406 case Bytecodes::_fast_linearswitch: |
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407 // recompute condtional expression folded into _if<cond> |
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408 case Bytecodes::_lcmp : |
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409 case Bytecodes::_fcmpl : |
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410 case Bytecodes::_fcmpg : |
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411 case Bytecodes::_dcmpl : |
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412 case Bytecodes::_dcmpg : |
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413 case Bytecodes::_ifnull : |
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414 case Bytecodes::_ifnonnull : |
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415 case Bytecodes::_goto : |
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416 case Bytecodes::_goto_w : |
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417 case Bytecodes::_ifeq : |
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418 case Bytecodes::_ifne : |
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419 case Bytecodes::_iflt : |
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420 case Bytecodes::_ifge : |
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421 case Bytecodes::_ifgt : |
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422 case Bytecodes::_ifle : |
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423 case Bytecodes::_if_icmpeq : |
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424 case Bytecodes::_if_icmpne : |
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425 case Bytecodes::_if_icmplt : |
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426 case Bytecodes::_if_icmpge : |
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427 case Bytecodes::_if_icmpgt : |
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428 case Bytecodes::_if_icmple : |
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429 case Bytecodes::_if_acmpeq : |
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430 case Bytecodes::_if_acmpne : |
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431 // special cases |
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432 case Bytecodes::_getfield : |
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433 case Bytecodes::_putfield : |
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434 case Bytecodes::_getstatic : |
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435 case Bytecodes::_putstatic : |
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436 case Bytecodes::_aastore : |
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437 #if defined(COMPILER1) |
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438 |
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439 //special case of reexecution |
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440 case Bytecodes::_athrow : |
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441 #endif |
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442 return true; |
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443 |
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444 default: |
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445 return false; |
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446 } |
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447 } |
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448 |
0 | 449 void AbstractInterpreterGenerator::bang_stack_shadow_pages(bool native_call) { |
450 // Quick & dirty stack overflow checking: bang the stack & handle trap. | |
451 // Note that we do the banging after the frame is setup, since the exception | |
452 // handling code expects to find a valid interpreter frame on the stack. | |
453 // Doing the banging earlier fails if the caller frame is not an interpreter | |
454 // frame. | |
455 // (Also, the exception throwing code expects to unlock any synchronized | |
456 // method receiever, so do the banging after locking the receiver.) | |
457 | |
458 // Bang each page in the shadow zone. We can't assume it's been done for | |
459 // an interpreter frame with greater than a page of locals, so each page | |
460 // needs to be checked. Only true for non-native. | |
461 if (UseStackBanging) { | |
462 const int start_page = native_call ? StackShadowPages : 1; | |
463 const int page_size = os::vm_page_size(); | |
464 for (int pages = start_page; pages <= StackShadowPages ; pages++) { | |
465 __ bang_stack_with_offset(pages*page_size); | |
466 } | |
467 } | |
468 } | |
6926 | 469 |
470 void AbstractInterpreterGenerator::initialize_method_handle_entries() { | |
471 // method handle entry kinds are generated later in MethodHandlesAdapterGenerator::generate: | |
472 for (int i = Interpreter::method_handle_invoke_FIRST; i <= Interpreter::method_handle_invoke_LAST; i++) { | |
473 Interpreter::MethodKind kind = (Interpreter::MethodKind) i; | |
474 Interpreter::_entry_table[kind] = Interpreter::_entry_table[Interpreter::abstract]; | |
475 } | |
476 } |