Mercurial > hg > graal-jvmci-8
annotate src/share/vm/ci/ciMethod.cpp @ 24170:0b85ccd62409 jdk8u131-b01
8168699: Validate special case invocations
Reviewed-by: kevinw, vlivanov
author | coleenp |
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date | Tue, 13 Dec 2016 14:37:04 -0500 |
parents | bf41eee321e5 |
children | 719853999215 |
rev | line source |
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0 | 1 /* |
24170 | 2 * Copyright (c) 1999, 2016, 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 "ci/ciCallProfile.hpp" | |
27 #include "ci/ciExceptionHandler.hpp" | |
28 #include "ci/ciInstanceKlass.hpp" | |
29 #include "ci/ciMethod.hpp" | |
30 #include "ci/ciMethodBlocks.hpp" | |
31 #include "ci/ciMethodData.hpp" | |
32 #include "ci/ciStreams.hpp" | |
33 #include "ci/ciSymbol.hpp" | |
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34 #include "ci/ciReplay.hpp" |
1972 | 35 #include "ci/ciUtilities.hpp" |
36 #include "classfile/systemDictionary.hpp" | |
37 #include "compiler/abstractCompiler.hpp" | |
38 #include "compiler/compilerOracle.hpp" | |
39 #include "compiler/methodLiveness.hpp" | |
40 #include "interpreter/interpreter.hpp" | |
41 #include "interpreter/linkResolver.hpp" | |
42 #include "interpreter/oopMapCache.hpp" | |
43 #include "memory/allocation.inline.hpp" | |
44 #include "memory/resourceArea.hpp" | |
45 #include "oops/generateOopMap.hpp" | |
46 #include "oops/oop.inline.hpp" | |
47 #include "prims/nativeLookup.hpp" | |
48 #include "runtime/deoptimization.hpp" | |
49 #include "utilities/bitMap.inline.hpp" | |
50 #include "utilities/xmlstream.hpp" | |
51 #ifdef COMPILER2 | |
52 #include "ci/bcEscapeAnalyzer.hpp" | |
53 #include "ci/ciTypeFlow.hpp" | |
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54 #include "oops/method.hpp" |
1972 | 55 #endif |
56 #ifdef SHARK | |
57 #include "ci/ciTypeFlow.hpp" | |
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58 #include "oops/method.hpp" |
1972 | 59 #endif |
0 | 60 |
61 // ciMethod | |
62 // | |
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63 // This class represents a Method* in the HotSpot virtual |
0 | 64 // machine. |
65 | |
66 | |
67 // ------------------------------------------------------------------ | |
68 // ciMethod::ciMethod | |
69 // | |
70 // Loaded method. | |
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71 ciMethod::ciMethod(methodHandle h_m, ciInstanceKlass* holder) : |
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72 ciMetadata(h_m()), |
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73 _holder(holder) |
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74 { |
0 | 75 assert(h_m() != NULL, "no null method"); |
76 | |
77 // These fields are always filled in in loaded methods. | |
78 _flags = ciFlags(h_m()->access_flags()); | |
79 | |
80 // Easy to compute, so fill them in now. | |
81 _max_stack = h_m()->max_stack(); | |
82 _max_locals = h_m()->max_locals(); | |
83 _code_size = h_m()->code_size(); | |
84 _intrinsic_id = h_m()->intrinsic_id(); | |
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85 _handler_count = h_m()->exception_table_length(); |
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86 _size_of_parameters = h_m()->size_of_parameters(); |
0 | 87 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes(); |
88 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching(); | |
1783 | 89 _is_c1_compilable = !h_m()->is_not_c1_compilable(); |
90 _is_c2_compilable = !h_m()->is_not_c2_compilable(); | |
0 | 91 // Lazy fields, filled in on demand. Require allocation. |
92 _code = NULL; | |
93 _exception_handlers = NULL; | |
94 _liveness = NULL; | |
95 _method_blocks = NULL; | |
1692 | 96 #if defined(COMPILER2) || defined(SHARK) |
0 | 97 _flow = NULL; |
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98 _bcea = NULL; |
1692 | 99 #endif // COMPILER2 || SHARK |
0 | 100 |
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101 ciEnv *env = CURRENT_ENV; |
1783 | 102 if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) { |
0 | 103 // 6328518 check hotswap conditions under the right lock. |
104 MutexLocker locker(Compile_lock); | |
105 if (Dependencies::check_evol_method(h_m()) != NULL) { | |
1783 | 106 _is_c1_compilable = false; |
107 _is_c2_compilable = false; | |
0 | 108 } |
109 } else { | |
110 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
111 } | |
112 | |
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113 if (h_m()->method_holder()->is_linked()) { |
0 | 114 _can_be_statically_bound = h_m()->can_be_statically_bound(); |
115 } else { | |
116 // Have to use a conservative value in this case. | |
117 _can_be_statically_bound = false; | |
118 } | |
119 | |
120 // Adjust the definition of this condition to be more useful: | |
121 // %%% take these conditions into account in vtable generation | |
122 if (!_can_be_statically_bound && h_m()->is_private()) | |
123 _can_be_statically_bound = true; | |
124 if (_can_be_statically_bound && h_m()->is_abstract()) | |
125 _can_be_statically_bound = false; | |
126 | |
127 // generating _signature may allow GC and therefore move m. | |
128 // These fields are always filled in. | |
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129 _name = env->get_symbol(h_m()->name()); |
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130 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature()); |
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131 constantPoolHandle cpool = h_m()->constants(); |
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132 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol); |
0 | 133 _method_data = NULL; |
134 // Take a snapshot of these values, so they will be commensurate with the MDO. | |
1783 | 135 if (ProfileInterpreter || TieredCompilation) { |
0 | 136 int invcnt = h_m()->interpreter_invocation_count(); |
137 // if the value overflowed report it as max int | |
138 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; | |
139 _interpreter_throwout_count = h_m()->interpreter_throwout_count(); | |
140 } else { | |
141 _interpreter_invocation_count = 0; | |
142 _interpreter_throwout_count = 0; | |
143 } | |
144 if (_interpreter_invocation_count == 0) | |
145 _interpreter_invocation_count = 1; | |
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146 _instructions_size = -1; |
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147 #ifdef ASSERT |
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148 if (ReplayCompiles) { |
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149 ciReplay::initialize(this); |
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150 } |
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151 #endif |
0 | 152 } |
153 | |
154 | |
155 // ------------------------------------------------------------------ | |
156 // ciMethod::ciMethod | |
157 // | |
158 // Unloaded method. | |
159 ciMethod::ciMethod(ciInstanceKlass* holder, | |
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160 ciSymbol* name, |
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161 ciSymbol* signature, |
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162 ciInstanceKlass* accessor) : |
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163 ciMetadata((Metadata*)NULL), |
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164 _name( name), |
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165 _holder( holder), |
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166 _intrinsic_id( vmIntrinsics::_none), |
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167 _liveness( NULL), |
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168 _can_be_statically_bound(false), |
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169 _method_blocks( NULL), |
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170 _method_data( NULL) |
1692 | 171 #if defined(COMPILER2) || defined(SHARK) |
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172 , |
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173 _flow( NULL), |
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174 _bcea( NULL), |
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175 _instructions_size(-1) |
1692 | 176 #endif // COMPILER2 || SHARK |
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177 { |
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178 // Usually holder and accessor are the same type but in some cases |
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179 // the holder has the wrong class loader (e.g. invokedynamic call |
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180 // sites) so we pass the accessor. |
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181 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature); |
0 | 182 } |
183 | |
184 | |
185 // ------------------------------------------------------------------ | |
186 // ciMethod::load_code | |
187 // | |
188 // Load the bytecodes and exception handler table for this method. | |
189 void ciMethod::load_code() { | |
190 VM_ENTRY_MARK; | |
191 assert(is_loaded(), "only loaded methods have code"); | |
192 | |
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193 Method* me = get_Method(); |
0 | 194 Arena* arena = CURRENT_THREAD_ENV->arena(); |
195 | |
196 // Load the bytecodes. | |
197 _code = (address)arena->Amalloc(code_size()); | |
198 memcpy(_code, me->code_base(), code_size()); | |
199 | |
200 // Revert any breakpoint bytecodes in ci's copy | |
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201 if (me->number_of_breakpoints() > 0) { |
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202 BreakpointInfo* bp = me->method_holder()->breakpoints(); |
0 | 203 for (; bp != NULL; bp = bp->next()) { |
204 if (bp->match(me)) { | |
205 code_at_put(bp->bci(), bp->orig_bytecode()); | |
206 } | |
207 } | |
208 } | |
209 | |
210 // And load the exception table. | |
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211 ExceptionTable exc_table(me); |
0 | 212 |
213 // Allocate one extra spot in our list of exceptions. This | |
214 // last entry will be used to represent the possibility that | |
215 // an exception escapes the method. See ciExceptionHandlerStream | |
216 // for details. | |
217 _exception_handlers = | |
218 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) | |
219 * (_handler_count + 1)); | |
220 if (_handler_count > 0) { | |
221 for (int i=0; i<_handler_count; i++) { | |
222 _exception_handlers[i] = new (arena) ciExceptionHandler( | |
223 holder(), | |
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224 /* start */ exc_table.start_pc(i), |
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225 /* limit */ exc_table.end_pc(i), |
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226 /* goto pc */ exc_table.handler_pc(i), |
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227 /* cp index */ exc_table.catch_type_index(i)); |
0 | 228 } |
229 } | |
230 | |
231 // Put an entry at the end of our list to represent the possibility | |
232 // of exceptional exit. | |
233 _exception_handlers[_handler_count] = | |
234 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); | |
235 | |
236 if (CIPrintMethodCodes) { | |
237 print_codes(); | |
238 } | |
239 } | |
240 | |
241 | |
242 // ------------------------------------------------------------------ | |
243 // ciMethod::has_linenumber_table | |
244 // | |
245 // length unknown until decompression | |
246 bool ciMethod::has_linenumber_table() const { | |
247 check_is_loaded(); | |
248 VM_ENTRY_MARK; | |
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249 return get_Method()->has_linenumber_table(); |
0 | 250 } |
251 | |
252 | |
253 // ------------------------------------------------------------------ | |
254 // ciMethod::compressed_linenumber_table | |
255 u_char* ciMethod::compressed_linenumber_table() const { | |
256 check_is_loaded(); | |
257 VM_ENTRY_MARK; | |
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258 return get_Method()->compressed_linenumber_table(); |
0 | 259 } |
260 | |
261 | |
262 // ------------------------------------------------------------------ | |
263 // ciMethod::line_number_from_bci | |
264 int ciMethod::line_number_from_bci(int bci) const { | |
265 check_is_loaded(); | |
266 VM_ENTRY_MARK; | |
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267 return get_Method()->line_number_from_bci(bci); |
0 | 268 } |
269 | |
270 | |
271 // ------------------------------------------------------------------ | |
272 // ciMethod::vtable_index | |
273 // | |
274 // Get the position of this method's entry in the vtable, if any. | |
275 int ciMethod::vtable_index() { | |
276 check_is_loaded(); | |
277 assert(holder()->is_linked(), "must be linked"); | |
278 VM_ENTRY_MARK; | |
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279 return get_Method()->vtable_index(); |
0 | 280 } |
281 | |
282 | |
1692 | 283 #ifdef SHARK |
284 // ------------------------------------------------------------------ | |
285 // ciMethod::itable_index | |
286 // | |
287 // Get the position of this method's entry in the itable, if any. | |
288 int ciMethod::itable_index() { | |
289 check_is_loaded(); | |
290 assert(holder()->is_linked(), "must be linked"); | |
291 VM_ENTRY_MARK; | |
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292 Method* m = get_Method(); |
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293 if (!m->has_itable_index()) |
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294 return Method::nonvirtual_vtable_index; |
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295 return m->itable_index(); |
1692 | 296 } |
297 #endif // SHARK | |
298 | |
299 | |
0 | 300 // ------------------------------------------------------------------ |
301 // ciMethod::native_entry | |
302 // | |
303 // Get the address of this method's native code, if any. | |
304 address ciMethod::native_entry() { | |
305 check_is_loaded(); | |
306 assert(flags().is_native(), "must be native method"); | |
307 VM_ENTRY_MARK; | |
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308 Method* method = get_Method(); |
0 | 309 address entry = method->native_function(); |
310 assert(entry != NULL, "must be valid entry point"); | |
311 return entry; | |
312 } | |
313 | |
314 | |
315 // ------------------------------------------------------------------ | |
316 // ciMethod::interpreter_entry | |
317 // | |
318 // Get the entry point for running this method in the interpreter. | |
319 address ciMethod::interpreter_entry() { | |
320 check_is_loaded(); | |
321 VM_ENTRY_MARK; | |
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322 methodHandle mh(THREAD, get_Method()); |
0 | 323 return Interpreter::entry_for_method(mh); |
324 } | |
325 | |
326 | |
327 // ------------------------------------------------------------------ | |
328 // ciMethod::uses_balanced_monitors | |
329 // | |
330 // Does this method use monitors in a strict stack-disciplined manner? | |
331 bool ciMethod::has_balanced_monitors() { | |
332 check_is_loaded(); | |
333 if (_balanced_monitors) return true; | |
334 | |
335 // Analyze the method to see if monitors are used properly. | |
336 VM_ENTRY_MARK; | |
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337 methodHandle method(THREAD, get_Method()); |
0 | 338 assert(method->has_monitor_bytecodes(), "should have checked this"); |
339 | |
340 // Check to see if a previous compilation computed the | |
341 // monitor-matching analysis. | |
342 if (method->guaranteed_monitor_matching()) { | |
343 _balanced_monitors = true; | |
344 return true; | |
345 } | |
346 | |
347 { | |
348 EXCEPTION_MARK; | |
349 ResourceMark rm(THREAD); | |
350 GeneratePairingInfo gpi(method); | |
351 gpi.compute_map(CATCH); | |
352 if (!gpi.monitor_safe()) { | |
353 return false; | |
354 } | |
355 method->set_guaranteed_monitor_matching(); | |
356 _balanced_monitors = true; | |
357 } | |
358 return true; | |
359 } | |
360 | |
361 | |
362 // ------------------------------------------------------------------ | |
363 // ciMethod::get_flow_analysis | |
364 ciTypeFlow* ciMethod::get_flow_analysis() { | |
1692 | 365 #if defined(COMPILER2) || defined(SHARK) |
0 | 366 if (_flow == NULL) { |
367 ciEnv* env = CURRENT_ENV; | |
368 _flow = new (env->arena()) ciTypeFlow(env, this); | |
369 _flow->do_flow(); | |
370 } | |
371 return _flow; | |
1692 | 372 #else // COMPILER2 || SHARK |
0 | 373 ShouldNotReachHere(); |
374 return NULL; | |
1692 | 375 #endif // COMPILER2 || SHARK |
0 | 376 } |
377 | |
378 | |
379 // ------------------------------------------------------------------ | |
380 // ciMethod::get_osr_flow_analysis | |
381 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { | |
1692 | 382 #if defined(COMPILER2) || defined(SHARK) |
0 | 383 // OSR entry points are always place after a call bytecode of some sort |
384 assert(osr_bci >= 0, "must supply valid OSR entry point"); | |
385 ciEnv* env = CURRENT_ENV; | |
386 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); | |
387 flow->do_flow(); | |
388 return flow; | |
1692 | 389 #else // COMPILER2 || SHARK |
0 | 390 ShouldNotReachHere(); |
391 return NULL; | |
1692 | 392 #endif // COMPILER2 || SHARK |
0 | 393 } |
394 | |
395 // ------------------------------------------------------------------ | |
991 | 396 // ciMethod::raw_liveness_at_bci |
0 | 397 // |
398 // Which local variables are live at a specific bci? | |
991 | 399 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { |
0 | 400 check_is_loaded(); |
401 if (_liveness == NULL) { | |
402 // Create the liveness analyzer. | |
403 Arena* arena = CURRENT_ENV->arena(); | |
404 _liveness = new (arena) MethodLiveness(arena, this); | |
405 _liveness->compute_liveness(); | |
406 } | |
991 | 407 return _liveness->get_liveness_at(bci); |
408 } | |
409 | |
410 // ------------------------------------------------------------------ | |
411 // ciMethod::liveness_at_bci | |
412 // | |
413 // Which local variables are live at a specific bci? When debugging | |
414 // will return true for all locals in some cases to improve debug | |
415 // information. | |
416 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { | |
417 MethodLivenessResult result = raw_liveness_at_bci(bci); | |
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418 if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) { |
0 | 419 // Keep all locals live for the user's edification and amusement. |
420 result.at_put_range(0, result.size(), true); | |
421 } | |
422 return result; | |
423 } | |
424 | |
425 // ciMethod::live_local_oops_at_bci | |
426 // | |
427 // find all the live oops in the locals array for a particular bci | |
428 // Compute what the interpreter believes by using the interpreter | |
429 // oopmap generator. This is used as a double check during osr to | |
430 // guard against conservative result from MethodLiveness making us | |
431 // think a dead oop is live. MethodLiveness is conservative in the | |
432 // sense that it may consider locals to be live which cannot be live, | |
433 // like in the case where a local could contain an oop or a primitive | |
434 // along different paths. In that case the local must be dead when | |
435 // those paths merge. Since the interpreter's viewpoint is used when | |
436 // gc'ing an interpreter frame we need to use its viewpoint during | |
437 // OSR when loading the locals. | |
438 | |
439 BitMap ciMethod::live_local_oops_at_bci(int bci) { | |
440 VM_ENTRY_MARK; | |
441 InterpreterOopMap mask; | |
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442 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask); |
0 | 443 int mask_size = max_locals(); |
444 BitMap result(mask_size); | |
445 result.clear(); | |
446 int i; | |
447 for (i = 0; i < mask_size ; i++ ) { | |
448 if (mask.is_oop(i)) result.set_bit(i); | |
449 } | |
450 return result; | |
451 } | |
452 | |
453 | |
454 #ifdef COMPILER1 | |
455 // ------------------------------------------------------------------ | |
456 // ciMethod::bci_block_start | |
457 // | |
458 // Marks all bcis where a new basic block starts | |
459 const BitMap ciMethod::bci_block_start() { | |
460 check_is_loaded(); | |
461 if (_liveness == NULL) { | |
462 // Create the liveness analyzer. | |
463 Arena* arena = CURRENT_ENV->arena(); | |
464 _liveness = new (arena) MethodLiveness(arena, this); | |
465 _liveness->compute_liveness(); | |
466 } | |
467 | |
468 return _liveness->get_bci_block_start(); | |
469 } | |
470 #endif // COMPILER1 | |
471 | |
472 | |
473 // ------------------------------------------------------------------ | |
474 // ciMethod::call_profile_at_bci | |
475 // | |
476 // Get the ciCallProfile for the invocation of this method. | |
477 // Also reports receiver types for non-call type checks (if TypeProfileCasts). | |
478 ciCallProfile ciMethod::call_profile_at_bci(int bci) { | |
479 ResourceMark rm; | |
480 ciCallProfile result; | |
481 if (method_data() != NULL && method_data()->is_mature()) { | |
482 ciProfileData* data = method_data()->bci_to_data(bci); | |
483 if (data != NULL && data->is_CounterData()) { | |
484 // Every profiled call site has a counter. | |
485 int count = data->as_CounterData()->count(); | |
486 | |
487 if (!data->is_ReceiverTypeData()) { | |
488 result._receiver_count[0] = 0; // that's a definite zero | |
489 } else { // ReceiverTypeData is a subclass of CounterData | |
490 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); | |
491 // In addition, virtual call sites have receiver type information | |
492 int receivers_count_total = 0; | |
493 int morphism = 0; | |
1783 | 494 // Precompute morphism for the possible fixup |
0 | 495 for (uint i = 0; i < call->row_limit(); i++) { |
496 ciKlass* receiver = call->receiver(i); | |
497 if (receiver == NULL) continue; | |
1783 | 498 morphism++; |
499 } | |
500 int epsilon = 0; | |
501 if (TieredCompilation && ProfileInterpreter) { | |
502 // Interpreter and C1 treat final and special invokes differently. | |
503 // C1 will record a type, whereas the interpreter will just | |
504 // increment the count. Detect this case. | |
505 if (morphism == 1 && count > 0) { | |
506 epsilon = count; | |
507 count = 0; | |
508 } | |
509 } | |
510 for (uint i = 0; i < call->row_limit(); i++) { | |
511 ciKlass* receiver = call->receiver(i); | |
512 if (receiver == NULL) continue; | |
513 int rcount = call->receiver_count(i) + epsilon; | |
0 | 514 if (rcount == 0) rcount = 1; // Should be valid value |
515 receivers_count_total += rcount; | |
516 // Add the receiver to result data. | |
517 result.add_receiver(receiver, rcount); | |
518 // If we extend profiling to record methods, | |
519 // we will set result._method also. | |
520 } | |
521 // Determine call site's morphism. | |
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522 // The call site count is 0 with known morphism (onlt 1 or 2 receivers) |
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523 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof. |
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524 // The call site count is > 0 in the case of a polymorphic virtual call. |
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525 if (morphism > 0 && morphism == result._limit) { |
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526 // The morphism <= MorphismLimit. |
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527 if ((morphism < ciCallProfile::MorphismLimit) || |
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528 (morphism == ciCallProfile::MorphismLimit && count == 0)) { |
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529 #ifdef ASSERT |
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530 if (count > 0) { |
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531 this->print_short_name(tty); |
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532 tty->print_cr(" @ bci:%d", bci); |
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533 this->print_codes(); |
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534 assert(false, "this call site should not be polymorphic"); |
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535 } |
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536 #endif |
0 | 537 result._morphism = morphism; |
538 } | |
539 } | |
540 // Make the count consistent if this is a call profile. If count is | |
541 // zero or less, presume that this is a typecheck profile and | |
542 // do nothing. Otherwise, increase count to be the sum of all | |
543 // receiver's counts. | |
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544 if (count >= 0) { |
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545 count += receivers_count_total; |
0 | 546 } |
547 } | |
548 result._count = count; | |
549 } | |
550 } | |
551 return result; | |
552 } | |
553 | |
554 // ------------------------------------------------------------------ | |
555 // Add new receiver and sort data by receiver's profile count. | |
556 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { | |
557 // Add new receiver and sort data by receiver's counts when we have space | |
558 // for it otherwise replace the less called receiver (less called receiver | |
559 // is placed to the last array element which is not used). | |
560 // First array's element contains most called receiver. | |
561 int i = _limit; | |
562 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { | |
563 _receiver[i] = _receiver[i-1]; | |
564 _receiver_count[i] = _receiver_count[i-1]; | |
565 } | |
566 _receiver[i] = receiver; | |
567 _receiver_count[i] = receiver_count; | |
568 if (_limit < MorphismLimit) _limit++; | |
569 } | |
570 | |
12966 | 571 |
572 void ciMethod::assert_virtual_call_type_ok(int bci) { | |
573 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual || | |
574 java_code_at_bci(bci) == Bytecodes::_invokeinterface, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)))); | |
575 } | |
576 | |
577 void ciMethod::assert_call_type_ok(int bci) { | |
578 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic || | |
579 java_code_at_bci(bci) == Bytecodes::_invokespecial || | |
580 java_code_at_bci(bci) == Bytecodes::_invokedynamic, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)))); | |
581 } | |
582 | |
583 /** | |
584 * Check whether profiling provides a type for the argument i to the | |
585 * call at bci bci | |
586 * | |
587 * @param bci bci of the call | |
588 * @param i argument number | |
589 * @return profiled type | |
590 * | |
591 * If the profile reports that the argument may be null, return false | |
592 * at least for now. | |
593 */ | |
594 ciKlass* ciMethod::argument_profiled_type(int bci, int i) { | |
595 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { | |
596 ciProfileData* data = method_data()->bci_to_data(bci); | |
597 if (data != NULL) { | |
598 if (data->is_VirtualCallTypeData()) { | |
599 assert_virtual_call_type_ok(bci); | |
600 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); | |
601 if (i >= call->number_of_arguments()) { | |
602 return NULL; | |
603 } | |
604 ciKlass* type = call->valid_argument_type(i); | |
605 if (type != NULL && !call->argument_maybe_null(i)) { | |
606 return type; | |
607 } | |
608 } else if (data->is_CallTypeData()) { | |
609 assert_call_type_ok(bci); | |
610 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); | |
611 if (i >= call->number_of_arguments()) { | |
612 return NULL; | |
613 } | |
614 ciKlass* type = call->valid_argument_type(i); | |
615 if (type != NULL && !call->argument_maybe_null(i)) { | |
616 return type; | |
617 } | |
618 } | |
619 } | |
620 } | |
621 return NULL; | |
622 } | |
623 | |
624 /** | |
625 * Check whether profiling provides a type for the return value from | |
626 * the call at bci bci | |
627 * | |
628 * @param bci bci of the call | |
629 * @return profiled type | |
630 * | |
631 * If the profile reports that the argument may be null, return false | |
632 * at least for now. | |
633 */ | |
634 ciKlass* ciMethod::return_profiled_type(int bci) { | |
635 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) { | |
636 ciProfileData* data = method_data()->bci_to_data(bci); | |
637 if (data != NULL) { | |
638 if (data->is_VirtualCallTypeData()) { | |
639 assert_virtual_call_type_ok(bci); | |
640 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); | |
641 ciKlass* type = call->valid_return_type(); | |
642 if (type != NULL && !call->return_maybe_null()) { | |
643 return type; | |
644 } | |
645 } else if (data->is_CallTypeData()) { | |
646 assert_call_type_ok(bci); | |
647 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); | |
648 ciKlass* type = call->valid_return_type(); | |
649 if (type != NULL && !call->return_maybe_null()) { | |
650 return type; | |
651 } | |
652 } | |
653 } | |
654 } | |
655 return NULL; | |
656 } | |
657 | |
658 /** | |
659 * Check whether profiling provides a type for the parameter i | |
660 * | |
661 * @param i parameter number | |
662 * @return profiled type | |
663 * | |
664 * If the profile reports that the argument may be null, return false | |
665 * at least for now. | |
666 */ | |
667 ciKlass* ciMethod::parameter_profiled_type(int i) { | |
668 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { | |
669 ciParametersTypeData* parameters = method_data()->parameters_type_data(); | |
670 if (parameters != NULL && i < parameters->number_of_parameters()) { | |
671 ciKlass* type = parameters->valid_parameter_type(i); | |
672 if (type != NULL && !parameters->parameter_maybe_null(i)) { | |
673 return type; | |
674 } | |
675 } | |
676 } | |
677 return NULL; | |
678 } | |
679 | |
680 | |
0 | 681 // ------------------------------------------------------------------ |
682 // ciMethod::find_monomorphic_target | |
683 // | |
684 // Given a certain calling environment, find the monomorphic target | |
685 // for the call. Return NULL if the call is not monomorphic in | |
686 // its calling environment, or if there are only abstract methods. | |
687 // The returned method is never abstract. | |
688 // Note: If caller uses a non-null result, it must inform dependencies | |
689 // via assert_unique_concrete_method or assert_leaf_type. | |
690 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, | |
691 ciInstanceKlass* callee_holder, | |
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692 ciInstanceKlass* actual_recv, |
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693 bool check_access) { |
0 | 694 check_is_loaded(); |
695 | |
696 if (actual_recv->is_interface()) { | |
697 // %%% We cannot trust interface types, yet. See bug 6312651. | |
698 return NULL; | |
699 } | |
700 | |
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701 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access); |
0 | 702 if (root_m == NULL) { |
703 // Something went wrong looking up the actual receiver method. | |
704 return NULL; | |
705 } | |
706 assert(!root_m->is_abstract(), "resolve_invoke promise"); | |
707 | |
708 // Make certain quick checks even if UseCHA is false. | |
709 | |
710 // Is it private or final? | |
711 if (root_m->can_be_statically_bound()) { | |
712 return root_m; | |
713 } | |
714 | |
715 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { | |
716 // Easy case. There is no other place to put a method, so don't bother | |
717 // to go through the VM_ENTRY_MARK and all the rest. | |
718 return root_m; | |
719 } | |
720 | |
721 // Array methods (clone, hashCode, etc.) are always statically bound. | |
722 // If we were to see an array type here, we'd return root_m. | |
723 // However, this method processes only ciInstanceKlasses. (See 4962591.) | |
724 // The inline_native_clone intrinsic narrows Object to T[] properly, | |
725 // so there is no need to do the same job here. | |
726 | |
727 if (!UseCHA) return NULL; | |
728 | |
729 VM_ENTRY_MARK; | |
730 | |
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732 if (root_m->get_Method()->is_default_method()) { |
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733 return NULL; |
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734 } |
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735 |
0 | 736 methodHandle target; |
737 { | |
738 MutexLocker locker(Compile_lock); | |
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739 Klass* context = actual_recv->get_Klass(); |
0 | 740 target = Dependencies::find_unique_concrete_method(context, |
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741 root_m->get_Method()); |
0 | 742 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. |
743 } | |
744 | |
745 #ifndef PRODUCT | |
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746 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) { |
0 | 747 tty->print("found a non-root unique target method"); |
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748 tty->print_cr(" context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name()); |
0 | 749 tty->print(" method = "); |
750 target->print_short_name(tty); | |
751 tty->cr(); | |
752 } | |
753 #endif //PRODUCT | |
754 | |
755 if (target() == NULL) { | |
756 return NULL; | |
757 } | |
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758 if (target() == root_m->get_Method()) { |
0 | 759 return root_m; |
760 } | |
761 if (!root_m->is_public() && | |
762 !root_m->is_protected()) { | |
763 // If we are going to reason about inheritance, it's easiest | |
764 // if the method in question is public, protected, or private. | |
765 // If the answer is not root_m, it is conservatively correct | |
766 // to return NULL, even if the CHA encountered irrelevant | |
767 // methods in other packages. | |
768 // %%% TO DO: Work out logic for package-private methods | |
769 // with the same name but different vtable indexes. | |
770 return NULL; | |
771 } | |
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772 return CURRENT_THREAD_ENV->get_method(target()); |
0 | 773 } |
774 | |
775 // ------------------------------------------------------------------ | |
776 // ciMethod::resolve_invoke | |
777 // | |
778 // Given a known receiver klass, find the target for the call. | |
779 // Return NULL if the call has no target or the target is abstract. | |
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780 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) { |
0 | 781 check_is_loaded(); |
782 VM_ENTRY_MARK; | |
783 | |
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784 KlassHandle caller_klass (THREAD, caller->get_Klass()); |
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785 KlassHandle h_recv (THREAD, exact_receiver->get_Klass()); |
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786 KlassHandle h_resolved (THREAD, holder()->get_Klass()); |
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787 Symbol* h_name = name()->get_symbol(); |
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788 Symbol* h_signature = signature()->get_symbol(); |
0 | 789 |
790 methodHandle m; | |
791 // Only do exact lookup if receiver klass has been linked. Otherwise, | |
792 // the vtable has not been setup, and the LinkResolver will fail. | |
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793 if (h_recv->oop_is_array() |
0 | 794 || |
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795 InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) { |
0 | 796 if (holder()->is_interface()) { |
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797 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass, check_access); |
0 | 798 } else { |
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799 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass, check_access); |
0 | 800 } |
801 } | |
802 | |
803 if (m.is_null()) { | |
804 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) | |
805 return NULL; | |
806 } | |
807 | |
808 ciMethod* result = this; | |
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809 if (m() != get_Method()) { |
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810 result = CURRENT_THREAD_ENV->get_method(m()); |
0 | 811 } |
812 | |
813 // Don't return abstract methods because they aren't | |
814 // optimizable or interesting. | |
815 if (result->is_abstract()) { | |
816 return NULL; | |
817 } else { | |
818 return result; | |
819 } | |
820 } | |
821 | |
822 // ------------------------------------------------------------------ | |
823 // ciMethod::resolve_vtable_index | |
824 // | |
825 // Given a known receiver klass, find the vtable index for the call. | |
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826 // Return Method::invalid_vtable_index if the vtable_index is unknown. |
0 | 827 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { |
828 check_is_loaded(); | |
829 | |
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830 int vtable_index = Method::invalid_vtable_index; |
0 | 831 // Only do lookup if receiver klass has been linked. Otherwise, |
832 // the vtable has not been setup, and the LinkResolver will fail. | |
833 if (!receiver->is_interface() | |
834 && (!receiver->is_instance_klass() || | |
835 receiver->as_instance_klass()->is_linked())) { | |
836 VM_ENTRY_MARK; | |
837 | |
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838 KlassHandle caller_klass (THREAD, caller->get_Klass()); |
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839 KlassHandle h_recv (THREAD, receiver->get_Klass()); |
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840 Symbol* h_name = name()->get_symbol(); |
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841 Symbol* h_signature = signature()->get_symbol(); |
0 | 842 |
843 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass); | |
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844 if (vtable_index == Method::nonvirtual_vtable_index) { |
0 | 845 // A statically bound method. Return "no such index". |
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846 vtable_index = Method::invalid_vtable_index; |
0 | 847 } |
848 } | |
849 | |
850 return vtable_index; | |
851 } | |
852 | |
853 // ------------------------------------------------------------------ | |
854 // ciMethod::interpreter_call_site_count | |
855 int ciMethod::interpreter_call_site_count(int bci) { | |
856 if (method_data() != NULL) { | |
857 ResourceMark rm; | |
858 ciProfileData* data = method_data()->bci_to_data(bci); | |
859 if (data != NULL && data->is_CounterData()) { | |
860 return scale_count(data->as_CounterData()->count()); | |
861 } | |
862 } | |
863 return -1; // unknown | |
864 } | |
865 | |
866 // ------------------------------------------------------------------ | |
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867 // ciMethod::get_field_at_bci |
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868 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) { |
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869 ciBytecodeStream iter(this); |
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870 iter.reset_to_bci(bci); |
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871 iter.next(); |
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872 return iter.get_field(will_link); |
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873 } |
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874 |
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875 // ------------------------------------------------------------------ |
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876 // ciMethod::get_method_at_bci |
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877 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) { |
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878 ciBytecodeStream iter(this); |
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879 iter.reset_to_bci(bci); |
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880 iter.next(); |
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881 return iter.get_method(will_link, declared_signature); |
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882 } |
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883 |
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884 // ------------------------------------------------------------------ |
0 | 885 // Adjust a CounterData count to be commensurate with |
886 // interpreter_invocation_count. If the MDO exists for | |
887 // only 25% of the time the method exists, then the | |
888 // counts in the MDO should be scaled by 4X, so that | |
889 // they can be usefully and stably compared against the | |
890 // invocation counts in methods. | |
891 int ciMethod::scale_count(int count, float prof_factor) { | |
892 if (count > 0 && method_data() != NULL) { | |
1783 | 893 int counter_life; |
0 | 894 int method_life = interpreter_invocation_count(); |
1783 | 895 if (TieredCompilation) { |
896 // In tiered the MDO's life is measured directly, so just use the snapshotted counters | |
897 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count()); | |
898 } else { | |
899 int current_mileage = method_data()->current_mileage(); | |
900 int creation_mileage = method_data()->creation_mileage(); | |
901 counter_life = current_mileage - creation_mileage; | |
902 } | |
903 | |
0 | 904 // counter_life due to backedge_counter could be > method_life |
905 if (counter_life > method_life) | |
906 counter_life = method_life; | |
907 if (0 < counter_life && counter_life <= method_life) { | |
908 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); | |
909 count = (count > 0) ? count : 1; | |
910 } | |
911 } | |
912 return count; | |
913 } | |
914 | |
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915 |
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916 // ------------------------------------------------------------------ |
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917 // ciMethod::is_special_get_caller_class_method |
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918 // |
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919 bool ciMethod::is_ignored_by_security_stack_walk() const { |
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920 check_is_loaded(); |
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921 VM_ENTRY_MARK; |
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922 return get_Method()->is_ignored_by_security_stack_walk(); |
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923 } |
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924 |
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925 |
0 | 926 // ------------------------------------------------------------------ |
710 | 927 // invokedynamic support |
1564 | 928 |
929 // ------------------------------------------------------------------ | |
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930 // ciMethod::is_method_handle_intrinsic |
710 | 931 // |
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932 // Return true if the method is an instance of the JVM-generated |
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933 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. |
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934 bool ciMethod::is_method_handle_intrinsic() const { |
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935 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded |
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936 return (MethodHandles::is_signature_polymorphic(iid) && |
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937 MethodHandles::is_signature_polymorphic_intrinsic(iid)); |
710 | 938 } |
939 | |
1564 | 940 // ------------------------------------------------------------------ |
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941 // ciMethod::is_compiled_lambda_form |
1564 | 942 // |
943 // Return true if the method is a generated MethodHandle adapter. | |
6266
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944 // These are built by Java code. |
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945 bool ciMethod::is_compiled_lambda_form() const { |
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946 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded |
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947 return iid == vmIntrinsics::_compiledLambdaForm; |
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948 } |
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949 |
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950 // ------------------------------------------------------------------ |
24170 | 951 // ciMethod::is_object_initializer |
952 // | |
953 bool ciMethod::is_object_initializer() const { | |
954 return name() == ciSymbol::object_initializer_name(); | |
955 } | |
956 | |
957 // ------------------------------------------------------------------ | |
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958 // ciMethod::has_member_arg |
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959 // |
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960 // Return true if the method is a linker intrinsic like _linkToVirtual. |
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961 // These are built by the JVM. |
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962 bool ciMethod::has_member_arg() const { |
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963 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded |
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964 return (MethodHandles::is_signature_polymorphic(iid) && |
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965 MethodHandles::has_member_arg(iid)); |
710 | 966 } |
967 | |
968 // ------------------------------------------------------------------ | |
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969 // ciMethod::ensure_method_data |
0 | 970 // |
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971 // Generate new MethodData* objects at compile time. |
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972 // Return true if allocation was successful or no MDO is required. |
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973 bool ciMethod::ensure_method_data(methodHandle h_m) { |
0 | 974 EXCEPTION_CONTEXT; |
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975 if (is_native() || is_abstract() || h_m()->is_accessor()) { |
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976 return true; |
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977 } |
0 | 978 if (h_m()->method_data() == NULL) { |
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979 Method::build_interpreter_method_data(h_m, THREAD); |
0 | 980 if (HAS_PENDING_EXCEPTION) { |
981 CLEAR_PENDING_EXCEPTION; | |
982 } | |
983 } | |
984 if (h_m()->method_data() != NULL) { | |
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985 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); |
0 | 986 _method_data->load_data(); |
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987 return true; |
0 | 988 } else { |
989 _method_data = CURRENT_ENV->get_empty_methodData(); | |
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990 return false; |
0 | 991 } |
992 } | |
993 | |
994 // public, retroactive version | |
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995 bool ciMethod::ensure_method_data() { |
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996 bool result = true; |
0 | 997 if (_method_data == NULL || _method_data->is_empty()) { |
998 GUARDED_VM_ENTRY({ | |
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999 result = ensure_method_data(get_Method()); |
0 | 1000 }); |
1001 } | |
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1002 return result; |
0 | 1003 } |
1004 | |
1005 | |
1006 // ------------------------------------------------------------------ | |
1007 // ciMethod::method_data | |
1008 // | |
1009 ciMethodData* ciMethod::method_data() { | |
1010 if (_method_data != NULL) { | |
1011 return _method_data; | |
1012 } | |
1013 VM_ENTRY_MARK; | |
1014 ciEnv* env = CURRENT_ENV; | |
1015 Thread* my_thread = JavaThread::current(); | |
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1016 methodHandle h_m(my_thread, get_Method()); |
0 | 1017 |
1018 if (h_m()->method_data() != NULL) { | |
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1019 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); |
0 | 1020 _method_data->load_data(); |
1021 } else { | |
1022 _method_data = CURRENT_ENV->get_empty_methodData(); | |
1023 } | |
1024 return _method_data; | |
1025 | |
1026 } | |
1027 | |
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1028 // ------------------------------------------------------------------ |
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1029 // ciMethod::method_data_or_null |
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1030 // Returns a pointer to ciMethodData if MDO exists on the VM side, |
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1031 // NULL otherwise. |
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1032 ciMethodData* ciMethod::method_data_or_null() { |
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1033 ciMethodData *md = method_data(); |
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1034 if (md->is_empty()) { |
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1035 return NULL; |
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1036 } |
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1037 return md; |
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1038 } |
0 | 1039 |
1040 // ------------------------------------------------------------------ | |
10105
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1041 // ciMethod::ensure_method_counters |
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1042 // |
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1043 MethodCounters* ciMethod::ensure_method_counters() { |
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1044 check_is_loaded(); |
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1045 VM_ENTRY_MARK; |
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1046 methodHandle mh(THREAD, get_Method()); |
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1047 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL); |
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1048 return method_counters; |
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1049 } |
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1050 |
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1051 // ------------------------------------------------------------------ |
0 | 1052 // ciMethod::should_exclude |
1053 // | |
1054 // Should this method be excluded from compilation? | |
1055 bool ciMethod::should_exclude() { | |
1056 check_is_loaded(); | |
1057 VM_ENTRY_MARK; | |
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1058 methodHandle mh(THREAD, get_Method()); |
0 | 1059 bool ignore; |
1060 return CompilerOracle::should_exclude(mh, ignore); | |
1061 } | |
1062 | |
1063 // ------------------------------------------------------------------ | |
1064 // ciMethod::should_inline | |
1065 // | |
1066 // Should this method be inlined during compilation? | |
1067 bool ciMethod::should_inline() { | |
1068 check_is_loaded(); | |
1069 VM_ENTRY_MARK; | |
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1070 methodHandle mh(THREAD, get_Method()); |
0 | 1071 return CompilerOracle::should_inline(mh); |
1072 } | |
1073 | |
1074 // ------------------------------------------------------------------ | |
1075 // ciMethod::should_not_inline | |
1076 // | |
1077 // Should this method be disallowed from inlining during compilation? | |
1078 bool ciMethod::should_not_inline() { | |
1079 check_is_loaded(); | |
1080 VM_ENTRY_MARK; | |
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1081 methodHandle mh(THREAD, get_Method()); |
0 | 1082 return CompilerOracle::should_not_inline(mh); |
1083 } | |
1084 | |
1085 // ------------------------------------------------------------------ | |
1086 // ciMethod::should_print_assembly | |
1087 // | |
1088 // Should the compiler print the generated code for this method? | |
1089 bool ciMethod::should_print_assembly() { | |
1090 check_is_loaded(); | |
1091 VM_ENTRY_MARK; | |
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1092 methodHandle mh(THREAD, get_Method()); |
0 | 1093 return CompilerOracle::should_print(mh); |
1094 } | |
1095 | |
1096 // ------------------------------------------------------------------ | |
1097 // ciMethod::break_at_execute | |
1098 // | |
1099 // Should the compiler insert a breakpoint into the generated code | |
1100 // method? | |
1101 bool ciMethod::break_at_execute() { | |
1102 check_is_loaded(); | |
1103 VM_ENTRY_MARK; | |
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1104 methodHandle mh(THREAD, get_Method()); |
0 | 1105 return CompilerOracle::should_break_at(mh); |
1106 } | |
1107 | |
1108 // ------------------------------------------------------------------ | |
1109 // ciMethod::has_option | |
1110 // | |
1111 bool ciMethod::has_option(const char* option) { | |
1112 check_is_loaded(); | |
1113 VM_ENTRY_MARK; | |
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1114 methodHandle mh(THREAD, get_Method()); |
0 | 1115 return CompilerOracle::has_option_string(mh, option); |
1116 } | |
1117 | |
1118 // ------------------------------------------------------------------ | |
20430 | 1119 // ciMethod::has_option_value |
1120 // | |
1121 template<typename T> | |
1122 bool ciMethod::has_option_value(const char* option, T& value) { | |
1123 check_is_loaded(); | |
1124 VM_ENTRY_MARK; | |
1125 methodHandle mh(THREAD, get_Method()); | |
1126 return CompilerOracle::has_option_value(mh, option, value); | |
1127 } | |
1128 // Explicit instantiation for all OptionTypes supported. | |
1129 template bool ciMethod::has_option_value<intx>(const char* option, intx& value); | |
1130 template bool ciMethod::has_option_value<uintx>(const char* option, uintx& value); | |
1131 template bool ciMethod::has_option_value<bool>(const char* option, bool& value); | |
1132 template bool ciMethod::has_option_value<ccstr>(const char* option, ccstr& value); | |
1133 | |
1134 // ------------------------------------------------------------------ | |
0 | 1135 // ciMethod::can_be_compiled |
1136 // | |
1137 // Have previous compilations of this method succeeded? | |
1138 bool ciMethod::can_be_compiled() { | |
1139 check_is_loaded(); | |
1783 | 1140 ciEnv* env = CURRENT_ENV; |
1141 if (is_c1_compile(env->comp_level())) { | |
1142 return _is_c1_compilable; | |
1143 } | |
1144 return _is_c2_compilable; | |
0 | 1145 } |
1146 | |
1147 // ------------------------------------------------------------------ | |
1148 // ciMethod::set_not_compilable | |
1149 // | |
1150 // Tell the VM that this method cannot be compiled at all. | |
7998 | 1151 void ciMethod::set_not_compilable(const char* reason) { |
0 | 1152 check_is_loaded(); |
1153 VM_ENTRY_MARK; | |
1783 | 1154 ciEnv* env = CURRENT_ENV; |
1155 if (is_c1_compile(env->comp_level())) { | |
1156 _is_c1_compilable = false; | |
1157 } else { | |
1158 _is_c2_compilable = false; | |
1159 } | |
7998 | 1160 get_Method()->set_not_compilable(env->comp_level(), true, reason); |
0 | 1161 } |
1162 | |
1163 // ------------------------------------------------------------------ | |
1164 // ciMethod::can_be_osr_compiled | |
1165 // | |
1166 // Have previous compilations of this method succeeded? | |
1167 // | |
1168 // Implementation note: the VM does not currently keep track | |
1169 // of failed OSR compilations per bci. The entry_bci parameter | |
1170 // is currently unused. | |
1171 bool ciMethod::can_be_osr_compiled(int entry_bci) { | |
1172 check_is_loaded(); | |
1173 VM_ENTRY_MARK; | |
1783 | 1174 ciEnv* env = CURRENT_ENV; |
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1175 return !get_Method()->is_not_osr_compilable(env->comp_level()); |
0 | 1176 } |
1177 | |
1178 // ------------------------------------------------------------------ | |
1179 // ciMethod::has_compiled_code | |
1180 bool ciMethod::has_compiled_code() { | |
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1181 return instructions_size() > 0; |
0 | 1182 } |
1183 | |
1783 | 1184 int ciMethod::comp_level() { |
1185 check_is_loaded(); | |
1186 VM_ENTRY_MARK; | |
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1187 nmethod* nm = get_Method()->code(); |
1783 | 1188 if (nm != NULL) return nm->comp_level(); |
1189 return 0; | |
1190 } | |
1191 | |
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1192 int ciMethod::highest_osr_comp_level() { |
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1193 check_is_loaded(); |
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1194 VM_ENTRY_MARK; |
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1195 return get_Method()->highest_osr_comp_level(); |
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1196 } |
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1197 |
0 | 1198 // ------------------------------------------------------------------ |
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1199 // ciMethod::code_size_for_inlining |
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1200 // |
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1201 // Code size for inlining decisions. This method returns a code |
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1202 // size of 1 for methods which has the ForceInline annotation. |
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1203 int ciMethod::code_size_for_inlining() { |
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1204 check_is_loaded(); |
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1205 if (get_Method()->force_inline()) { |
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1206 return 1; |
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1207 } |
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1208 return code_size(); |
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1209 } |
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1210 |
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1211 // ------------------------------------------------------------------ |
0 | 1212 // ciMethod::instructions_size |
1748 | 1213 // |
1214 // This is a rough metric for "fat" methods, compared before inlining | |
1215 // with InlineSmallCode. The CodeBlob::code_size accessor includes | |
1216 // junk like exception handler, stubs, and constant table, which are | |
1217 // not highly relevant to an inlined method. So we use the more | |
1218 // specific accessor nmethod::insts_size. | |
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1219 int ciMethod::instructions_size() { |
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1220 if (_instructions_size == -1) { |
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1221 GUARDED_VM_ENTRY( |
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1222 nmethod* code = get_Method()->code(); |
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1223 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) { |
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1224 _instructions_size = code->insts_end() - code->verified_entry_point(); |
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1225 } else { |
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1226 _instructions_size = 0; |
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1227 } |
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1228 ); |
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1229 } |
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1230 return _instructions_size; |
0 | 1231 } |
1232 | |
1233 // ------------------------------------------------------------------ | |
1234 // ciMethod::log_nmethod_identity | |
1235 void ciMethod::log_nmethod_identity(xmlStream* log) { | |
1236 GUARDED_VM_ENTRY( | |
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1237 nmethod* code = get_Method()->code(); |
0 | 1238 if (code != NULL) { |
1239 code->log_identity(log); | |
1240 } | |
1241 ) | |
1242 } | |
1243 | |
1244 // ------------------------------------------------------------------ | |
1245 // ciMethod::is_not_reached | |
1246 bool ciMethod::is_not_reached(int bci) { | |
1247 check_is_loaded(); | |
1248 VM_ENTRY_MARK; | |
1249 return Interpreter::is_not_reached( | |
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1250 methodHandle(THREAD, get_Method()), bci); |
0 | 1251 } |
1252 | |
1253 // ------------------------------------------------------------------ | |
1254 // ciMethod::was_never_executed | |
1255 bool ciMethod::was_executed_more_than(int times) { | |
1256 VM_ENTRY_MARK; | |
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1257 return get_Method()->was_executed_more_than(times); |
0 | 1258 } |
1259 | |
1260 // ------------------------------------------------------------------ | |
1261 // ciMethod::has_unloaded_classes_in_signature | |
1262 bool ciMethod::has_unloaded_classes_in_signature() { | |
1263 VM_ENTRY_MARK; | |
1264 { | |
1265 EXCEPTION_MARK; | |
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1266 methodHandle m(THREAD, get_Method()); |
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1267 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); |
0 | 1268 if( HAS_PENDING_EXCEPTION ) { |
1269 CLEAR_PENDING_EXCEPTION; | |
1270 return true; // Declare that we may have unloaded classes | |
1271 } | |
1272 return has_unloaded; | |
1273 } | |
1274 } | |
1275 | |
1276 // ------------------------------------------------------------------ | |
1277 // ciMethod::is_klass_loaded | |
1278 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { | |
1279 VM_ENTRY_MARK; | |
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1280 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved); |
0 | 1281 } |
1282 | |
1283 // ------------------------------------------------------------------ | |
1284 // ciMethod::check_call | |
1285 bool ciMethod::check_call(int refinfo_index, bool is_static) const { | |
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1286 // This method is used only in C2 from InlineTree::ok_to_inline, |
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1287 // and is only used under -Xcomp or -XX:CompileTheWorld. |
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1288 // It appears to fail when applied to an invokeinterface call site. |
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1289 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points. |
0 | 1290 VM_ENTRY_MARK; |
1291 { | |
1292 EXCEPTION_MARK; | |
1293 HandleMark hm(THREAD); | |
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1294 constantPoolHandle pool (THREAD, get_Method()->constants()); |
0 | 1295 methodHandle spec_method; |
1296 KlassHandle spec_klass; | |
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1297 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); |
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1298 LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD); |
0 | 1299 if (HAS_PENDING_EXCEPTION) { |
1300 CLEAR_PENDING_EXCEPTION; | |
1301 return false; | |
1302 } else { | |
1303 return (spec_method->is_static() == is_static); | |
1304 } | |
1305 } | |
1306 return false; | |
1307 } | |
1308 | |
1309 // ------------------------------------------------------------------ | |
1310 // ciMethod::print_codes | |
1311 // | |
1312 // Print the bytecodes for this method. | |
1313 void ciMethod::print_codes_on(outputStream* st) { | |
1314 check_is_loaded(); | |
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1315 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);) |
0 | 1316 } |
1317 | |
1318 | |
1319 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ | |
1320 check_is_loaded(); \ | |
1321 VM_ENTRY_MARK; \ | |
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1322 return get_Method()->flag_accessor(); \ |
0 | 1323 } |
1324 | |
1325 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } | |
1326 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } | |
1327 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } | |
1328 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } | |
1329 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } | |
1330 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } | |
1331 | |
10278 | 1332 bool ciMethod::is_boxing_method() const { |
1333 if (holder()->is_box_klass()) { | |
1334 switch (intrinsic_id()) { | |
1335 case vmIntrinsics::_Boolean_valueOf: | |
1336 case vmIntrinsics::_Byte_valueOf: | |
1337 case vmIntrinsics::_Character_valueOf: | |
1338 case vmIntrinsics::_Short_valueOf: | |
1339 case vmIntrinsics::_Integer_valueOf: | |
1340 case vmIntrinsics::_Long_valueOf: | |
1341 case vmIntrinsics::_Float_valueOf: | |
1342 case vmIntrinsics::_Double_valueOf: | |
1343 return true; | |
1344 default: | |
1345 return false; | |
1346 } | |
1347 } | |
1348 return false; | |
1349 } | |
1350 | |
1351 bool ciMethod::is_unboxing_method() const { | |
1352 if (holder()->is_box_klass()) { | |
1353 switch (intrinsic_id()) { | |
1354 case vmIntrinsics::_booleanValue: | |
1355 case vmIntrinsics::_byteValue: | |
1356 case vmIntrinsics::_charValue: | |
1357 case vmIntrinsics::_shortValue: | |
1358 case vmIntrinsics::_intValue: | |
1359 case vmIntrinsics::_longValue: | |
1360 case vmIntrinsics::_floatValue: | |
1361 case vmIntrinsics::_doubleValue: | |
1362 return true; | |
1363 default: | |
1364 return false; | |
1365 } | |
1366 } | |
1367 return false; | |
1368 } | |
1369 | |
0 | 1370 BCEscapeAnalyzer *ciMethod::get_bcea() { |
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1371 #ifdef COMPILER2 |
0 | 1372 if (_bcea == NULL) { |
1373 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); | |
1374 } | |
1375 return _bcea; | |
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1376 #else // COMPILER2 |
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1377 ShouldNotReachHere(); |
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1378 return NULL; |
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1379 #endif // COMPILER2 |
0 | 1380 } |
1381 | |
1382 ciMethodBlocks *ciMethod::get_method_blocks() { | |
1383 Arena *arena = CURRENT_ENV->arena(); | |
1384 if (_method_blocks == NULL) { | |
1385 _method_blocks = new (arena) ciMethodBlocks(arena, this); | |
1386 } | |
1387 return _method_blocks; | |
1388 } | |
1389 | |
1390 #undef FETCH_FLAG_FROM_VM | |
1391 | |
17622 | 1392 void ciMethod::dump_name_as_ascii(outputStream* st) { |
1393 Method* method = get_Method(); | |
1394 st->print("%s %s %s", | |
1395 method->klass_name()->as_quoted_ascii(), | |
1396 method->name()->as_quoted_ascii(), | |
1397 method->signature()->as_quoted_ascii()); | |
1398 } | |
1399 | |
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1400 void ciMethod::dump_replay_data(outputStream* st) { |
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1401 ResourceMark rm; |
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1402 Method* method = get_Method(); |
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1403 MethodCounters* mcs = method->method_counters(); |
17622 | 1404 st->print("ciMethod "); |
1405 dump_name_as_ascii(st); | |
1406 st->print_cr(" %d %d %d %d %d", | |
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1407 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(), |
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1408 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(), |
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1409 interpreter_invocation_count(), |
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1410 interpreter_throwout_count(), |
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1411 _instructions_size); |
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1412 } |
0 | 1413 |
1414 // ------------------------------------------------------------------ | |
1415 // ciMethod::print_codes | |
1416 // | |
1417 // Print a range of the bytecodes for this method. | |
1418 void ciMethod::print_codes_on(int from, int to, outputStream* st) { | |
1419 check_is_loaded(); | |
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1420 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);) |
0 | 1421 } |
1422 | |
1423 // ------------------------------------------------------------------ | |
1424 // ciMethod::print_name | |
1425 // | |
1426 // Print the name of this method, including signature and some flags. | |
1427 void ciMethod::print_name(outputStream* st) { | |
1428 check_is_loaded(); | |
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1429 GUARDED_VM_ENTRY(get_Method()->print_name(st);) |
0 | 1430 } |
1431 | |
1432 // ------------------------------------------------------------------ | |
1433 // ciMethod::print_short_name | |
1434 // | |
1435 // Print the name of this method, without signature. | |
1436 void ciMethod::print_short_name(outputStream* st) { | |
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1437 if (is_loaded()) { |
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1438 GUARDED_VM_ENTRY(get_Method()->print_short_name(st);); |
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1439 } else { |
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1440 // Fall back if method is not loaded. |
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1441 holder()->print_name_on(st); |
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1442 st->print("::"); |
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1443 name()->print_symbol_on(st); |
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1444 if (WizardMode) |
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1445 signature()->as_symbol()->print_symbol_on(st); |
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1446 } |
0 | 1447 } |
1448 | |
1449 // ------------------------------------------------------------------ | |
1450 // ciMethod::print_impl | |
1451 // | |
1452 // Implementation of the print method. | |
1453 void ciMethod::print_impl(outputStream* st) { | |
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1454 ciMetadata::print_impl(st); |
0 | 1455 st->print(" name="); |
1456 name()->print_symbol_on(st); | |
1457 st->print(" holder="); | |
1458 holder()->print_name_on(st); | |
1459 st->print(" signature="); | |
1460 signature()->as_symbol()->print_symbol_on(st); | |
1461 if (is_loaded()) { | |
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1462 st->print(" loaded=true"); |
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1463 st->print(" arg_size=%d", arg_size()); |
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1464 st->print(" flags="); |
0 | 1465 flags().print_member_flags(st); |
1466 } else { | |
1467 st->print(" loaded=false"); | |
1468 } | |
1469 } |