Mercurial > hg > truffle
annotate src/share/vm/interpreter/interpreter.cpp @ 17458:ddcb2ac2900d
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author | drchase |
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date | Thu, 12 Dec 2013 20:55:36 -0500 |
parents | bd3237e0e18d |
children | 096c224171c4 78bbf4d43a14 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, 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 |
0 | 67 if (PrintInterpreter) { |
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68 st->cr(); |
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69 st->print_cr("----------------------------------------------------------------------"); |
0 | 70 } |
71 | |
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72 if (description() != NULL) st->print("%s ", description()); |
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73 if (bytecode() >= 0 ) st->print("%d %s ", bytecode(), Bytecodes::name(bytecode())); |
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74 st->print_cr("[" INTPTR_FORMAT ", " INTPTR_FORMAT "] %d bytes", |
0 | 75 code_begin(), code_end(), code_size()); |
76 | |
77 if (PrintInterpreter) { | |
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78 st->cr(); |
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79 Disassembler::decode(code_begin(), code_end(), st, DEBUG_ONLY(_strings) NOT_DEBUG(CodeStrings())); |
0 | 80 } |
81 } | |
82 | |
83 | |
84 //------------------------------------------------------------------------------------------------------------------------ | |
85 // Implementation of platform independent aspects of Interpreter | |
86 | |
87 void AbstractInterpreter::initialize() { | |
88 if (_code != NULL) return; | |
89 | |
90 // make sure 'imported' classes are initialized | |
91 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) BytecodeCounter::reset(); | |
92 if (PrintBytecodeHistogram) BytecodeHistogram::reset(); | |
93 if (PrintBytecodePairHistogram) BytecodePairHistogram::reset(); | |
94 | |
95 InvocationCounter::reinitialize(DelayCompilationDuringStartup); | |
96 | |
97 } | |
98 | |
99 void AbstractInterpreter::print() { | |
100 tty->cr(); | |
101 tty->print_cr("----------------------------------------------------------------------"); | |
102 tty->print_cr("Interpreter"); | |
103 tty->cr(); | |
104 tty->print_cr("code size = %6dK bytes", (int)_code->used_space()/1024); | |
105 tty->print_cr("total space = %6dK bytes", (int)_code->total_space()/1024); | |
106 tty->print_cr("wasted space = %6dK bytes", (int)_code->available_space()/1024); | |
107 tty->cr(); | |
108 tty->print_cr("# of codelets = %6d" , _code->number_of_stubs()); | |
109 tty->print_cr("avg codelet size = %6d bytes", _code->used_space() / _code->number_of_stubs()); | |
110 tty->cr(); | |
111 _code->print(); | |
112 tty->print_cr("----------------------------------------------------------------------"); | |
113 tty->cr(); | |
114 } | |
115 | |
116 | |
117 void interpreter_init() { | |
118 Interpreter::initialize(); | |
119 #ifndef PRODUCT | |
120 if (TraceBytecodes) BytecodeTracer::set_closure(BytecodeTracer::std_closure()); | |
121 #endif // PRODUCT | |
122 // need to hit every safepoint in order to call zapping routine | |
123 // register the interpreter | |
124 Forte::register_stub( | |
125 "Interpreter", | |
126 AbstractInterpreter::code()->code_start(), | |
127 AbstractInterpreter::code()->code_end() | |
128 ); | |
129 | |
130 // notify JVMTI profiler | |
131 if (JvmtiExport::should_post_dynamic_code_generated()) { | |
132 JvmtiExport::post_dynamic_code_generated("Interpreter", | |
133 AbstractInterpreter::code()->code_start(), | |
134 AbstractInterpreter::code()->code_end()); | |
135 } | |
136 } | |
137 | |
138 //------------------------------------------------------------------------------------------------------------------------ | |
139 // Implementation of interpreter | |
140 | |
141 StubQueue* AbstractInterpreter::_code = NULL; | |
142 bool AbstractInterpreter::_notice_safepoints = false; | |
143 address AbstractInterpreter::_rethrow_exception_entry = NULL; | |
144 | |
145 address AbstractInterpreter::_native_entry_begin = NULL; | |
146 address AbstractInterpreter::_native_entry_end = NULL; | |
147 address AbstractInterpreter::_slow_signature_handler; | |
148 address AbstractInterpreter::_entry_table [AbstractInterpreter::number_of_method_entries]; | |
149 address AbstractInterpreter::_native_abi_to_tosca [AbstractInterpreter::number_of_result_handlers]; | |
150 | |
151 //------------------------------------------------------------------------------------------------------------------------ | |
152 // Generation of complete interpreter | |
153 | |
154 AbstractInterpreterGenerator::AbstractInterpreterGenerator(StubQueue* _code) { | |
155 _masm = NULL; | |
156 } | |
157 | |
158 | |
159 static const BasicType types[Interpreter::number_of_result_handlers] = { | |
160 T_BOOLEAN, | |
161 T_CHAR , | |
162 T_BYTE , | |
163 T_SHORT , | |
164 T_INT , | |
165 T_LONG , | |
166 T_VOID , | |
167 T_FLOAT , | |
168 T_DOUBLE , | |
169 T_OBJECT | |
170 }; | |
171 | |
172 void AbstractInterpreterGenerator::generate_all() { | |
173 | |
174 | |
175 { CodeletMark cm(_masm, "slow signature handler"); | |
176 Interpreter::_slow_signature_handler = generate_slow_signature_handler(); | |
177 } | |
178 | |
179 } | |
180 | |
181 //------------------------------------------------------------------------------------------------------------------------ | |
182 // Entry points | |
183 | |
184 AbstractInterpreter::MethodKind AbstractInterpreter::method_kind(methodHandle m) { | |
185 // Abstract method? | |
186 if (m->is_abstract()) return abstract; | |
187 | |
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188 // Method handle primitive? |
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189 if (m->is_method_handle_intrinsic()) { |
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190 vmIntrinsics::ID id = m->intrinsic_id(); |
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191 assert(MethodHandles::is_signature_polymorphic(id), "must match an intrinsic"); |
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192 MethodKind kind = (MethodKind)( method_handle_invoke_FIRST + |
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193 ((int)id - vmIntrinsics::FIRST_MH_SIG_POLY) ); |
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194 assert(kind <= method_handle_invoke_LAST, "parallel enum ranges"); |
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195 return kind; |
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196 } |
710 | 197 |
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198 #ifndef CC_INTERP |
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199 if (UseCRC32Intrinsics && m->is_native()) { |
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200 // Use optimized stub code for CRC32 native methods. |
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201 switch (m->intrinsic_id()) { |
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202 case vmIntrinsics::_updateCRC32 : return java_util_zip_CRC32_update; |
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203 case vmIntrinsics::_updateBytesCRC32 : return java_util_zip_CRC32_updateBytes; |
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204 case vmIntrinsics::_updateByteBufferCRC32 : return java_util_zip_CRC32_updateByteBuffer; |
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205 } |
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206 } |
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207 #endif |
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208 |
0 | 209 // Native method? |
210 // Note: This test must come _before_ the test for intrinsic | |
211 // methods. See also comments below. | |
212 if (m->is_native()) { | |
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213 assert(!m->is_method_handle_intrinsic(), "overlapping bits here, watch out"); |
0 | 214 return m->is_synchronized() ? native_synchronized : native; |
215 } | |
216 | |
217 // Synchronized? | |
218 if (m->is_synchronized()) { | |
219 return zerolocals_synchronized; | |
220 } | |
221 | |
222 if (RegisterFinalizersAtInit && m->code_size() == 1 && | |
223 m->intrinsic_id() == vmIntrinsics::_Object_init) { | |
224 // We need to execute the special return bytecode to check for | |
225 // finalizer registration so create a normal frame. | |
226 return zerolocals; | |
227 } | |
228 | |
229 // Empty method? | |
230 if (m->is_empty_method()) { | |
231 return empty; | |
232 } | |
233 | |
234 // Special intrinsic method? | |
235 // Note: This test must come _after_ the test for native methods, | |
236 // otherwise we will run into problems with JDK 1.2, see also | |
237 // AbstractInterpreterGenerator::generate_method_entry() for | |
238 // for details. | |
239 switch (m->intrinsic_id()) { | |
240 case vmIntrinsics::_dsin : return java_lang_math_sin ; | |
241 case vmIntrinsics::_dcos : return java_lang_math_cos ; | |
242 case vmIntrinsics::_dtan : return java_lang_math_tan ; | |
243 case vmIntrinsics::_dabs : return java_lang_math_abs ; | |
244 case vmIntrinsics::_dsqrt : return java_lang_math_sqrt ; | |
245 case vmIntrinsics::_dlog : return java_lang_math_log ; | |
246 case vmIntrinsics::_dlog10: return java_lang_math_log10; | |
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247 case vmIntrinsics::_dpow : return java_lang_math_pow ; |
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248 case vmIntrinsics::_dexp : return java_lang_math_exp ; |
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249 |
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250 case vmIntrinsics::_Reference_get: |
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251 return java_lang_ref_reference_get; |
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252 } |
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253 |
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254 // Accessor method? |
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255 if (m->is_accessor()) { |
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256 assert(m->size_of_parameters() == 1, "fast code for accessors assumes parameter size = 1"); |
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257 return accessor; |
0 | 258 } |
259 | |
260 // Note: for now: zero locals for all non-empty methods | |
261 return zerolocals; | |
262 } | |
263 | |
264 | |
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265 void AbstractInterpreter::set_entry_for_kind(AbstractInterpreter::MethodKind kind, address entry) { |
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266 assert(kind >= method_handle_invoke_FIRST && |
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267 kind <= method_handle_invoke_LAST, "late initialization only for MH entry points"); |
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268 assert(_entry_table[kind] == _entry_table[abstract], "previous value must be AME entry"); |
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269 _entry_table[kind] = entry; |
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270 } |
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271 |
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272 |
0 | 273 // Return true if the interpreter can prove that the given bytecode has |
274 // not yet been executed (in Java semantics, not in actual operation). | |
275 bool AbstractInterpreter::is_not_reached(methodHandle method, int bci) { | |
2142 | 276 Bytecodes::Code code = method()->code_at(bci); |
0 | 277 |
2142 | 278 if (!Bytecodes::must_rewrite(code)) { |
0 | 279 // might have been reached |
280 return false; | |
281 } | |
282 | |
283 // the bytecode might not be rewritten if the method is an accessor, etc. | |
284 address ientry = method->interpreter_entry(); | |
285 if (ientry != entry_for_kind(AbstractInterpreter::zerolocals) && | |
286 ientry != entry_for_kind(AbstractInterpreter::zerolocals_synchronized)) | |
287 return false; // interpreter does not run this method! | |
288 | |
289 // otherwise, we can be sure this bytecode has never been executed | |
290 return true; | |
291 } | |
292 | |
293 | |
294 #ifndef PRODUCT | |
295 void AbstractInterpreter::print_method_kind(MethodKind kind) { | |
296 switch (kind) { | |
297 case zerolocals : tty->print("zerolocals" ); break; | |
298 case zerolocals_synchronized: tty->print("zerolocals_synchronized"); break; | |
299 case native : tty->print("native" ); break; | |
300 case native_synchronized : tty->print("native_synchronized" ); break; | |
301 case empty : tty->print("empty" ); break; | |
302 case accessor : tty->print("accessor" ); break; | |
303 case abstract : tty->print("abstract" ); break; | |
304 case java_lang_math_sin : tty->print("java_lang_math_sin" ); break; | |
305 case java_lang_math_cos : tty->print("java_lang_math_cos" ); break; | |
306 case java_lang_math_tan : tty->print("java_lang_math_tan" ); break; | |
307 case java_lang_math_abs : tty->print("java_lang_math_abs" ); break; | |
308 case java_lang_math_sqrt : tty->print("java_lang_math_sqrt" ); break; | |
309 case java_lang_math_log : tty->print("java_lang_math_log" ); break; | |
310 case java_lang_math_log10 : tty->print("java_lang_math_log10" ); break; | |
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311 case java_util_zip_CRC32_update : tty->print("java_util_zip_CRC32_update"); break; |
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312 case java_util_zip_CRC32_updateBytes : tty->print("java_util_zip_CRC32_updateBytes"); break; |
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313 case java_util_zip_CRC32_updateByteBuffer : tty->print("java_util_zip_CRC32_updateByteBuffer"); break; |
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314 default: |
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315 if (kind >= method_handle_invoke_FIRST && |
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316 kind <= method_handle_invoke_LAST) { |
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317 const char* kind_name = vmIntrinsics::name_at(method_handle_intrinsic(kind)); |
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318 if (kind_name[0] == '_') kind_name = &kind_name[1]; // '_invokeExact' => 'invokeExact' |
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319 tty->print("method_handle_%s", kind_name); |
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320 break; |
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321 } |
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322 ShouldNotReachHere(); |
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323 break; |
0 | 324 } |
325 } | |
326 #endif // PRODUCT | |
327 | |
328 | |
329 //------------------------------------------------------------------------------------------------------------------------ | |
330 // Deoptimization support | |
331 | |
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332 /** |
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333 * If a deoptimization happens, this function returns the point of next bytecode to continue execution. |
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334 */ |
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335 address AbstractInterpreter::deopt_continue_after_entry(Method* method, address bcp, int callee_parameters, bool is_top_frame) { |
0 | 336 assert(method->contains(bcp), "just checkin'"); |
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337 |
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338 // Get the original and rewritten bytecode. |
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339 Bytecodes::Code code = Bytecodes::java_code_at(method, bcp); |
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340 assert(!Interpreter::bytecode_should_reexecute(code), "should not reexecute"); |
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341 |
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342 const int bci = method->bci_from(bcp); |
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343 |
0 | 344 // compute continuation length |
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345 const int length = Bytecodes::length_at(method, bcp); |
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346 |
0 | 347 // compute result type |
348 BasicType type = T_ILLEGAL; | |
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349 |
0 | 350 switch (code) { |
351 case Bytecodes::_invokevirtual : | |
352 case Bytecodes::_invokespecial : | |
353 case Bytecodes::_invokestatic : | |
354 case Bytecodes::_invokeinterface: { | |
355 Thread *thread = Thread::current(); | |
356 ResourceMark rm(thread); | |
357 methodHandle mh(thread, method); | |
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358 type = Bytecode_invoke(mh, bci).result_type(); |
0 | 359 // since the cache entry might not be initialized: |
360 // (NOT needed for the old calling convension) | |
361 if (!is_top_frame) { | |
362 int index = Bytes::get_native_u2(bcp+1); | |
363 method->constants()->cache()->entry_at(index)->set_parameter_size(callee_parameters); | |
364 } | |
365 break; | |
366 } | |
367 | |
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368 case Bytecodes::_invokedynamic: { |
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369 Thread *thread = Thread::current(); |
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370 ResourceMark rm(thread); |
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371 methodHandle mh(thread, method); |
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372 type = Bytecode_invoke(mh, bci).result_type(); |
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373 // since the cache entry might not be initialized: |
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374 // (NOT needed for the old calling convension) |
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375 if (!is_top_frame) { |
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376 int index = Bytes::get_native_u4(bcp+1); |
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377 method->constants()->invokedynamic_cp_cache_entry_at(index)->set_parameter_size(callee_parameters); |
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378 } |
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379 break; |
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380 } |
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381 |
0 | 382 case Bytecodes::_ldc : |
383 case Bytecodes::_ldc_w : // fall through | |
384 case Bytecodes::_ldc2_w: | |
1602 | 385 { |
386 Thread *thread = Thread::current(); | |
387 ResourceMark rm(thread); | |
388 methodHandle mh(thread, method); | |
2142 | 389 type = Bytecode_loadconstant(mh, bci).result_type(); |
1602 | 390 break; |
391 } | |
0 | 392 |
393 default: | |
394 type = Bytecodes::result_type(code); | |
395 break; | |
396 } | |
397 | |
398 // return entry point for computed continuation state & bytecode length | |
399 return | |
400 is_top_frame | |
401 ? Interpreter::deopt_entry (as_TosState(type), length) | |
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402 : Interpreter::return_entry(as_TosState(type), length, code); |
0 | 403 } |
404 | |
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405 // If deoptimization happens, this function returns the point where the interpreter reexecutes |
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406 // the bytecode. |
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407 // Note: Bytecodes::_athrow is a special case in that it does not return |
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408 // Interpreter::deopt_entry(vtos, 0) like others |
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409 address AbstractInterpreter::deopt_reexecute_entry(Method* method, address bcp) { |
900
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410 assert(method->contains(bcp), "just checkin'"); |
2142 | 411 Bytecodes::Code code = Bytecodes::java_code_at(method, bcp); |
900
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412 #ifdef COMPILER1 |
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413 if(code == Bytecodes::_athrow ) { |
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414 return Interpreter::rethrow_exception_entry(); |
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415 } |
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416 #endif /* COMPILER1 */ |
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417 return Interpreter::deopt_entry(vtos, 0); |
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418 } |
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419 |
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420 // If deoptimization happens, the interpreter should reexecute these bytecodes. |
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421 // This function mainly helps the compilers to set up the reexecute bit. |
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422 bool AbstractInterpreter::bytecode_should_reexecute(Bytecodes::Code code) { |
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423 switch (code) { |
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424 case Bytecodes::_lookupswitch: |
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425 case Bytecodes::_tableswitch: |
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426 case Bytecodes::_fast_binaryswitch: |
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427 case Bytecodes::_fast_linearswitch: |
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428 // recompute condtional expression folded into _if<cond> |
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429 case Bytecodes::_lcmp : |
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430 case Bytecodes::_fcmpl : |
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431 case Bytecodes::_fcmpg : |
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432 case Bytecodes::_dcmpl : |
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433 case Bytecodes::_dcmpg : |
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434 case Bytecodes::_ifnull : |
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435 case Bytecodes::_ifnonnull : |
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436 case Bytecodes::_goto : |
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437 case Bytecodes::_goto_w : |
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438 case Bytecodes::_ifeq : |
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439 case Bytecodes::_ifne : |
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440 case Bytecodes::_iflt : |
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441 case Bytecodes::_ifge : |
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442 case Bytecodes::_ifgt : |
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443 case Bytecodes::_ifle : |
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444 case Bytecodes::_if_icmpeq : |
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445 case Bytecodes::_if_icmpne : |
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446 case Bytecodes::_if_icmplt : |
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447 case Bytecodes::_if_icmpge : |
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448 case Bytecodes::_if_icmpgt : |
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449 case Bytecodes::_if_icmple : |
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450 case Bytecodes::_if_acmpeq : |
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451 case Bytecodes::_if_acmpne : |
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452 // special cases |
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453 case Bytecodes::_getfield : |
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454 case Bytecodes::_putfield : |
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455 case Bytecodes::_getstatic : |
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456 case Bytecodes::_putstatic : |
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457 case Bytecodes::_aastore : |
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458 #ifdef COMPILER1 |
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459 //special case of reexecution |
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460 case Bytecodes::_athrow : |
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461 #endif |
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462 return true; |
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463 |
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464 default: |
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465 return false; |
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466 } |
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467 } |
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468 |
0 | 469 void AbstractInterpreterGenerator::bang_stack_shadow_pages(bool native_call) { |
470 // Quick & dirty stack overflow checking: bang the stack & handle trap. | |
471 // Note that we do the banging after the frame is setup, since the exception | |
472 // handling code expects to find a valid interpreter frame on the stack. | |
473 // Doing the banging earlier fails if the caller frame is not an interpreter | |
474 // frame. | |
475 // (Also, the exception throwing code expects to unlock any synchronized | |
476 // method receiever, so do the banging after locking the receiver.) | |
477 | |
478 // Bang each page in the shadow zone. We can't assume it's been done for | |
479 // an interpreter frame with greater than a page of locals, so each page | |
480 // needs to be checked. Only true for non-native. | |
481 if (UseStackBanging) { | |
482 const int start_page = native_call ? StackShadowPages : 1; | |
483 const int page_size = os::vm_page_size(); | |
484 for (int pages = start_page; pages <= StackShadowPages ; pages++) { | |
485 __ bang_stack_with_offset(pages*page_size); | |
486 } | |
487 } | |
488 } | |
6926 | 489 |
490 void AbstractInterpreterGenerator::initialize_method_handle_entries() { | |
491 // method handle entry kinds are generated later in MethodHandlesAdapterGenerator::generate: | |
492 for (int i = Interpreter::method_handle_invoke_FIRST; i <= Interpreter::method_handle_invoke_LAST; i++) { | |
493 Interpreter::MethodKind kind = (Interpreter::MethodKind) i; | |
494 Interpreter::_entry_table[kind] = Interpreter::_entry_table[Interpreter::abstract]; | |
495 } | |
496 } |