Mercurial > hg > graal-compiler
annotate src/share/vm/ci/ciEnv.cpp @ 1766:02f0a9b6f654
6969586: OptimizeStringConcat: SIGSEGV in LoadNode::Value()
Reviewed-by: kvn
author | never |
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date | Mon, 30 Aug 2010 17:27:35 -0700 |
parents | e0ba4e04c839 |
children | d5d065957597 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2010, 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 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_ciEnv.cpp.incl" | |
27 | |
28 // ciEnv | |
29 // | |
30 // This class is the top level broker for requests from the compiler | |
31 // to the VM. | |
32 | |
33 ciObject* ciEnv::_null_object_instance; | |
34 ciMethodKlass* ciEnv::_method_klass_instance; | |
35 ciSymbolKlass* ciEnv::_symbol_klass_instance; | |
36 ciKlassKlass* ciEnv::_klass_klass_instance; | |
37 ciInstanceKlassKlass* ciEnv::_instance_klass_klass_instance; | |
38 ciTypeArrayKlassKlass* ciEnv::_type_array_klass_klass_instance; | |
39 ciObjArrayKlassKlass* ciEnv::_obj_array_klass_klass_instance; | |
40 | |
1142 | 41 #define WK_KLASS_DEFN(name, ignore_s, ignore_o) ciInstanceKlass* ciEnv::_##name = NULL; |
42 WK_KLASSES_DO(WK_KLASS_DEFN) | |
43 #undef WK_KLASS_DEFN | |
0 | 44 |
45 ciSymbol* ciEnv::_unloaded_cisymbol = NULL; | |
46 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = NULL; | |
47 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = NULL; | |
48 | |
49 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = NULL; | |
50 jobject ciEnv::_ArrayStoreException_handle = NULL; | |
51 jobject ciEnv::_ClassCastException_handle = NULL; | |
52 | |
53 #ifndef PRODUCT | |
54 static bool firstEnv = true; | |
55 #endif /* PRODUCT */ | |
56 | |
57 // ------------------------------------------------------------------ | |
58 // ciEnv::ciEnv | |
59 ciEnv::ciEnv(CompileTask* task, int system_dictionary_modification_counter) { | |
60 VM_ENTRY_MARK; | |
61 | |
62 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc. | |
63 thread->set_env(this); | |
64 assert(ciEnv::current() == this, "sanity"); | |
65 | |
66 _oop_recorder = NULL; | |
67 _debug_info = NULL; | |
68 _dependencies = NULL; | |
69 _failure_reason = NULL; | |
70 _compilable = MethodCompilable; | |
71 _break_at_compile = false; | |
72 _compiler_data = NULL; | |
73 #ifndef PRODUCT | |
74 assert(!firstEnv, "not initialized properly"); | |
75 #endif /* !PRODUCT */ | |
76 | |
77 _system_dictionary_modification_counter = system_dictionary_modification_counter; | |
78 _num_inlined_bytecodes = 0; | |
79 assert(task == NULL || thread->task() == task, "sanity"); | |
80 _task = task; | |
81 _log = NULL; | |
82 | |
83 // Temporary buffer for creating symbols and such. | |
84 _name_buffer = NULL; | |
85 _name_buffer_len = 0; | |
86 | |
87 _arena = &_ciEnv_arena; | |
88 _factory = new (_arena) ciObjectFactory(_arena, 128); | |
89 | |
90 // Preload commonly referenced system ciObjects. | |
91 | |
92 // During VM initialization, these instances have not yet been created. | |
93 // Assertions ensure that these instances are not accessed before | |
94 // their initialization. | |
95 | |
96 assert(Universe::is_fully_initialized(), "should be complete"); | |
97 | |
98 oop o = Universe::null_ptr_exception_instance(); | |
99 assert(o != NULL, "should have been initialized"); | |
100 _NullPointerException_instance = get_object(o)->as_instance(); | |
101 o = Universe::arithmetic_exception_instance(); | |
102 assert(o != NULL, "should have been initialized"); | |
103 _ArithmeticException_instance = get_object(o)->as_instance(); | |
104 | |
105 _ArrayIndexOutOfBoundsException_instance = NULL; | |
106 _ArrayStoreException_instance = NULL; | |
107 _ClassCastException_instance = NULL; | |
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108 _the_null_string = NULL; |
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109 _the_min_jint_string = NULL; |
0 | 110 } |
111 | |
112 ciEnv::ciEnv(Arena* arena) { | |
113 ASSERT_IN_VM; | |
114 | |
115 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc. | |
116 CompilerThread* current_thread = CompilerThread::current(); | |
117 assert(current_thread->env() == NULL, "must be"); | |
118 current_thread->set_env(this); | |
119 assert(ciEnv::current() == this, "sanity"); | |
120 | |
121 _oop_recorder = NULL; | |
122 _debug_info = NULL; | |
123 _dependencies = NULL; | |
124 _failure_reason = NULL; | |
125 _compilable = MethodCompilable_never; | |
126 _break_at_compile = false; | |
127 _compiler_data = NULL; | |
128 #ifndef PRODUCT | |
129 assert(firstEnv, "must be first"); | |
130 firstEnv = false; | |
131 #endif /* !PRODUCT */ | |
132 | |
133 _system_dictionary_modification_counter = 0; | |
134 _num_inlined_bytecodes = 0; | |
135 _task = NULL; | |
136 _log = NULL; | |
137 | |
138 // Temporary buffer for creating symbols and such. | |
139 _name_buffer = NULL; | |
140 _name_buffer_len = 0; | |
141 | |
142 _arena = arena; | |
143 _factory = new (_arena) ciObjectFactory(_arena, 128); | |
144 | |
145 // Preload commonly referenced system ciObjects. | |
146 | |
147 // During VM initialization, these instances have not yet been created. | |
148 // Assertions ensure that these instances are not accessed before | |
149 // their initialization. | |
150 | |
151 assert(Universe::is_fully_initialized(), "must be"); | |
152 | |
153 oop o = Universe::null_ptr_exception_instance(); | |
154 assert(o != NULL, "should have been initialized"); | |
155 _NullPointerException_instance = get_object(o)->as_instance(); | |
156 o = Universe::arithmetic_exception_instance(); | |
157 assert(o != NULL, "should have been initialized"); | |
158 _ArithmeticException_instance = get_object(o)->as_instance(); | |
159 | |
160 _ArrayIndexOutOfBoundsException_instance = NULL; | |
161 _ArrayStoreException_instance = NULL; | |
162 _ClassCastException_instance = NULL; | |
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163 _the_null_string = NULL; |
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164 _the_min_jint_string = NULL; |
0 | 165 } |
166 | |
167 ciEnv::~ciEnv() { | |
168 CompilerThread* current_thread = CompilerThread::current(); | |
169 current_thread->set_env(NULL); | |
170 } | |
171 | |
172 // ------------------------------------------------------------------ | |
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173 // Cache Jvmti state |
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174 void ciEnv::cache_jvmti_state() { |
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175 VM_ENTRY_MARK; |
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176 // Get Jvmti capabilities under lock to get consistant values. |
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177 MutexLocker mu(JvmtiThreadState_lock); |
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178 _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint(); |
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179 _jvmti_can_access_local_variables = JvmtiExport::can_access_local_variables(); |
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180 _jvmti_can_post_on_exceptions = JvmtiExport::can_post_on_exceptions(); |
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181 } |
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182 |
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183 // ------------------------------------------------------------------ |
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184 // Cache DTrace flags |
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185 void ciEnv::cache_dtrace_flags() { |
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186 // Need lock? |
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187 _dtrace_extended_probes = ExtendedDTraceProbes; |
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188 if (_dtrace_extended_probes) { |
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189 _dtrace_monitor_probes = true; |
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190 _dtrace_method_probes = true; |
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191 _dtrace_alloc_probes = true; |
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192 } else { |
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193 _dtrace_monitor_probes = DTraceMonitorProbes; |
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194 _dtrace_method_probes = DTraceMethodProbes; |
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195 _dtrace_alloc_probes = DTraceAllocProbes; |
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196 } |
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197 } |
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198 |
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199 // ------------------------------------------------------------------ |
0 | 200 // helper for lazy exception creation |
201 ciInstance* ciEnv::get_or_create_exception(jobject& handle, symbolHandle name) { | |
202 VM_ENTRY_MARK; | |
203 if (handle == NULL) { | |
204 // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance. | |
205 klassOop k = SystemDictionary::find(name, Handle(), Handle(), THREAD); | |
206 jobject objh = NULL; | |
207 if (!HAS_PENDING_EXCEPTION && k != NULL) { | |
208 oop obj = instanceKlass::cast(k)->allocate_permanent_instance(THREAD); | |
209 if (!HAS_PENDING_EXCEPTION) | |
210 objh = JNIHandles::make_global(obj); | |
211 } | |
212 if (HAS_PENDING_EXCEPTION) { | |
213 CLEAR_PENDING_EXCEPTION; | |
214 } else { | |
215 handle = objh; | |
216 } | |
217 } | |
218 oop obj = JNIHandles::resolve(handle); | |
219 return obj == NULL? NULL: get_object(obj)->as_instance(); | |
220 } | |
221 | |
222 // ------------------------------------------------------------------ | |
223 // ciEnv::ArrayIndexOutOfBoundsException_instance, etc. | |
224 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() { | |
225 if (_ArrayIndexOutOfBoundsException_instance == NULL) { | |
226 _ArrayIndexOutOfBoundsException_instance | |
227 = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle, | |
228 vmSymbolHandles::java_lang_ArrayIndexOutOfBoundsException()); | |
229 } | |
230 return _ArrayIndexOutOfBoundsException_instance; | |
231 } | |
232 ciInstance* ciEnv::ArrayStoreException_instance() { | |
233 if (_ArrayStoreException_instance == NULL) { | |
234 _ArrayStoreException_instance | |
235 = get_or_create_exception(_ArrayStoreException_handle, | |
236 vmSymbolHandles::java_lang_ArrayStoreException()); | |
237 } | |
238 return _ArrayStoreException_instance; | |
239 } | |
240 ciInstance* ciEnv::ClassCastException_instance() { | |
241 if (_ClassCastException_instance == NULL) { | |
242 _ClassCastException_instance | |
243 = get_or_create_exception(_ClassCastException_handle, | |
244 vmSymbolHandles::java_lang_ClassCastException()); | |
245 } | |
246 return _ClassCastException_instance; | |
247 } | |
248 | |
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249 ciInstance* ciEnv::the_null_string() { |
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250 if (_the_null_string == NULL) { |
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251 VM_ENTRY_MARK; |
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252 _the_null_string = get_object(Universe::the_null_string())->as_instance(); |
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253 } |
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254 return _the_null_string; |
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255 } |
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256 |
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257 ciInstance* ciEnv::the_min_jint_string() { |
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258 if (_the_min_jint_string == NULL) { |
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259 VM_ENTRY_MARK; |
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260 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance(); |
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261 } |
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262 return _the_min_jint_string; |
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263 } |
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264 |
0 | 265 // ------------------------------------------------------------------ |
266 // ciEnv::get_method_from_handle | |
267 ciMethod* ciEnv::get_method_from_handle(jobject method) { | |
268 VM_ENTRY_MARK; | |
269 return get_object(JNIHandles::resolve(method))->as_method(); | |
270 } | |
271 | |
272 // ------------------------------------------------------------------ | |
273 // ciEnv::make_array | |
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274 ciArray* ciEnv::make_system_array(GrowableArray<ciObject*>* objects) { |
0 | 275 VM_ENTRY_MARK; |
276 int length = objects->length(); | |
277 objArrayOop a = oopFactory::new_system_objArray(length, THREAD); | |
278 if (HAS_PENDING_EXCEPTION) { | |
279 CLEAR_PENDING_EXCEPTION; | |
280 record_out_of_memory_failure(); | |
281 return NULL; | |
282 } | |
283 for (int i = 0; i < length; i++) { | |
284 a->obj_at_put(i, objects->at(i)->get_oop()); | |
285 } | |
286 assert(a->is_perm(), ""); | |
287 return get_object(a)->as_array(); | |
288 } | |
289 | |
290 | |
291 // ------------------------------------------------------------------ | |
292 // ciEnv::array_element_offset_in_bytes | |
293 int ciEnv::array_element_offset_in_bytes(ciArray* a_h, ciObject* o_h) { | |
294 VM_ENTRY_MARK; | |
295 objArrayOop a = (objArrayOop)a_h->get_oop(); | |
296 assert(a->is_objArray(), ""); | |
297 int length = a->length(); | |
298 oop o = o_h->get_oop(); | |
299 for (int i = 0; i < length; i++) { | |
300 if (a->obj_at(i) == o) return i; | |
301 } | |
302 return -1; | |
303 } | |
304 | |
305 | |
306 // ------------------------------------------------------------------ | |
307 // ciEnv::check_klass_accessiblity | |
308 // | |
309 // Note: the logic of this method should mirror the logic of | |
310 // constantPoolOopDesc::verify_constant_pool_resolve. | |
311 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass, | |
312 klassOop resolved_klass) { | |
313 if (accessing_klass == NULL || !accessing_klass->is_loaded()) { | |
314 return true; | |
315 } | |
316 if (accessing_klass->is_obj_array()) { | |
317 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass(); | |
318 } | |
319 if (!accessing_klass->is_instance_klass()) { | |
320 return true; | |
321 } | |
322 | |
323 if (resolved_klass->klass_part()->oop_is_objArray()) { | |
324 // Find the element klass, if this is an array. | |
325 resolved_klass = objArrayKlass::cast(resolved_klass)->bottom_klass(); | |
326 } | |
327 if (resolved_klass->klass_part()->oop_is_instance()) { | |
328 return Reflection::verify_class_access(accessing_klass->get_klassOop(), | |
329 resolved_klass, | |
330 true); | |
331 } | |
332 return true; | |
333 } | |
334 | |
335 // ------------------------------------------------------------------ | |
336 // ciEnv::get_klass_by_name_impl | |
337 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass, | |
338 ciSymbol* name, | |
339 bool require_local) { | |
340 ASSERT_IN_VM; | |
341 EXCEPTION_CONTEXT; | |
342 | |
343 // Now we need to check the SystemDictionary | |
344 symbolHandle sym(THREAD, name->get_symbolOop()); | |
345 if (sym->byte_at(0) == 'L' && | |
346 sym->byte_at(sym->utf8_length()-1) == ';') { | |
347 // This is a name from a signature. Strip off the trimmings. | |
348 sym = oopFactory::new_symbol_handle(sym->as_utf8()+1, | |
349 sym->utf8_length()-2, | |
350 KILL_COMPILE_ON_FATAL_(_unloaded_ciinstance_klass)); | |
351 name = get_object(sym())->as_symbol(); | |
352 } | |
353 | |
354 // Check for prior unloaded klass. The SystemDictionary's answers | |
355 // can vary over time but the compiler needs consistency. | |
356 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name); | |
357 if (unloaded_klass != NULL) { | |
358 if (require_local) return NULL; | |
359 return unloaded_klass; | |
360 } | |
361 | |
362 Handle loader(THREAD, (oop)NULL); | |
363 Handle domain(THREAD, (oop)NULL); | |
364 if (accessing_klass != NULL) { | |
365 loader = Handle(THREAD, accessing_klass->loader()); | |
366 domain = Handle(THREAD, accessing_klass->protection_domain()); | |
367 } | |
368 | |
369 // setup up the proper type to return on OOM | |
370 ciKlass* fail_type; | |
371 if (sym->byte_at(0) == '[') { | |
372 fail_type = _unloaded_ciobjarrayklass; | |
373 } else { | |
374 fail_type = _unloaded_ciinstance_klass; | |
375 } | |
376 klassOop found_klass; | |
377 if (!require_local) { | |
378 found_klass = | |
379 SystemDictionary::find_constrained_instance_or_array_klass(sym, loader, | |
380 KILL_COMPILE_ON_FATAL_(fail_type)); | |
381 } else { | |
382 found_klass = | |
383 SystemDictionary::find_instance_or_array_klass(sym, loader, domain, | |
384 KILL_COMPILE_ON_FATAL_(fail_type)); | |
385 } | |
386 | |
387 // If we fail to find an array klass, look again for its element type. | |
388 // The element type may be available either locally or via constraints. | |
389 // In either case, if we can find the element type in the system dictionary, | |
390 // we must build an array type around it. The CI requires array klasses | |
391 // to be loaded if their element klasses are loaded, except when memory | |
392 // is exhausted. | |
393 if (sym->byte_at(0) == '[' && | |
394 (sym->byte_at(1) == '[' || sym->byte_at(1) == 'L')) { | |
395 // We have an unloaded array. | |
396 // Build it on the fly if the element class exists. | |
397 symbolOop elem_sym = oopFactory::new_symbol(sym->as_utf8()+1, | |
398 sym->utf8_length()-1, | |
399 KILL_COMPILE_ON_FATAL_(fail_type)); | |
400 // Get element ciKlass recursively. | |
401 ciKlass* elem_klass = | |
402 get_klass_by_name_impl(accessing_klass, | |
403 get_object(elem_sym)->as_symbol(), | |
404 require_local); | |
405 if (elem_klass != NULL && elem_klass->is_loaded()) { | |
406 // Now make an array for it | |
407 return ciObjArrayKlass::make_impl(elem_klass); | |
408 } | |
409 } | |
410 | |
411 if (found_klass != NULL) { | |
412 // Found it. Build a CI handle. | |
413 return get_object(found_klass)->as_klass(); | |
414 } | |
415 | |
416 if (require_local) return NULL; | |
417 // Not yet loaded into the VM, or not governed by loader constraints. | |
418 // Make a CI representative for it. | |
419 return get_unloaded_klass(accessing_klass, name); | |
420 } | |
421 | |
422 // ------------------------------------------------------------------ | |
423 // ciEnv::get_klass_by_name | |
424 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass, | |
425 ciSymbol* klass_name, | |
426 bool require_local) { | |
427 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass, | |
428 klass_name, | |
429 require_local);) | |
430 } | |
431 | |
432 // ------------------------------------------------------------------ | |
433 // ciEnv::get_klass_by_index_impl | |
434 // | |
435 // Implementation of get_klass_by_index. | |
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436 ciKlass* ciEnv::get_klass_by_index_impl(constantPoolHandle cpool, |
0 | 437 int index, |
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438 bool& is_accessible, |
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439 ciInstanceKlass* accessor) { |
0 | 440 EXCEPTION_CONTEXT; |
441 KlassHandle klass (THREAD, constantPoolOopDesc::klass_at_if_loaded(cpool, index)); | |
442 symbolHandle klass_name; | |
443 if (klass.is_null()) { | |
444 // The klass has not been inserted into the constant pool. | |
445 // Try to look it up by name. | |
446 { | |
447 // We have to lock the cpool to keep the oop from being resolved | |
448 // while we are accessing it. | |
449 ObjectLocker ol(cpool, THREAD); | |
450 | |
451 constantTag tag = cpool->tag_at(index); | |
452 if (tag.is_klass()) { | |
453 // The klass has been inserted into the constant pool | |
454 // very recently. | |
455 klass = KlassHandle(THREAD, cpool->resolved_klass_at(index)); | |
456 } else if (tag.is_symbol()) { | |
457 klass_name = symbolHandle(THREAD, cpool->symbol_at(index)); | |
458 } else { | |
459 assert(cpool->tag_at(index).is_unresolved_klass(), "wrong tag"); | |
460 klass_name = symbolHandle(THREAD, cpool->unresolved_klass_at(index)); | |
461 } | |
462 } | |
463 } | |
464 | |
465 if (klass.is_null()) { | |
466 // Not found in constant pool. Use the name to do the lookup. | |
467 ciKlass* k = get_klass_by_name_impl(accessor, | |
468 get_object(klass_name())->as_symbol(), | |
469 false); | |
470 // Calculate accessibility the hard way. | |
471 if (!k->is_loaded()) { | |
472 is_accessible = false; | |
473 } else if (k->loader() != accessor->loader() && | |
474 get_klass_by_name_impl(accessor, k->name(), true) == NULL) { | |
475 // Loaded only remotely. Not linked yet. | |
476 is_accessible = false; | |
477 } else { | |
478 // Linked locally, and we must also check public/private, etc. | |
479 is_accessible = check_klass_accessibility(accessor, k->get_klassOop()); | |
480 } | |
481 return k; | |
482 } | |
483 | |
484 // Check for prior unloaded klass. The SystemDictionary's answers | |
485 // can vary over time but the compiler needs consistency. | |
486 ciSymbol* name = get_object(klass()->klass_part()->name())->as_symbol(); | |
487 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name); | |
488 if (unloaded_klass != NULL) { | |
489 is_accessible = false; | |
490 return unloaded_klass; | |
491 } | |
492 | |
493 // It is known to be accessible, since it was found in the constant pool. | |
494 is_accessible = true; | |
495 return get_object(klass())->as_klass(); | |
496 } | |
497 | |
498 // ------------------------------------------------------------------ | |
499 // ciEnv::get_klass_by_index | |
500 // | |
501 // Get a klass from the constant pool. | |
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502 ciKlass* ciEnv::get_klass_by_index(constantPoolHandle cpool, |
0 | 503 int index, |
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504 bool& is_accessible, |
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505 ciInstanceKlass* accessor) { |
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506 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);) |
0 | 507 } |
508 | |
509 // ------------------------------------------------------------------ | |
510 // ciEnv::get_constant_by_index_impl | |
511 // | |
512 // Implementation of get_constant_by_index(). | |
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513 ciConstant ciEnv::get_constant_by_index_impl(constantPoolHandle cpool, |
1602 | 514 int pool_index, int cache_index, |
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515 ciInstanceKlass* accessor) { |
1602 | 516 bool ignore_will_link; |
0 | 517 EXCEPTION_CONTEXT; |
1602 | 518 int index = pool_index; |
519 if (cache_index >= 0) { | |
520 assert(index < 0, "only one kind of index at a time"); | |
521 ConstantPoolCacheEntry* cpc_entry = cpool->cache()->entry_at(cache_index); | |
522 index = cpc_entry->constant_pool_index(); | |
523 oop obj = cpc_entry->f1(); | |
524 if (obj != NULL) { | |
525 assert(obj->is_instance(), "must be an instance"); | |
526 ciObject* ciobj = get_object(obj); | |
527 return ciConstant(T_OBJECT, ciobj); | |
528 } | |
529 } | |
0 | 530 constantTag tag = cpool->tag_at(index); |
531 if (tag.is_int()) { | |
532 return ciConstant(T_INT, (jint)cpool->int_at(index)); | |
533 } else if (tag.is_long()) { | |
534 return ciConstant((jlong)cpool->long_at(index)); | |
535 } else if (tag.is_float()) { | |
536 return ciConstant((jfloat)cpool->float_at(index)); | |
537 } else if (tag.is_double()) { | |
538 return ciConstant((jdouble)cpool->double_at(index)); | |
539 } else if (tag.is_string() || tag.is_unresolved_string()) { | |
431
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540 oop string = NULL; |
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541 if (cpool->is_pseudo_string_at(index)) { |
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542 string = cpool->pseudo_string_at(index); |
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543 } else { |
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544 string = cpool->string_at(index, THREAD); |
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545 if (HAS_PENDING_EXCEPTION) { |
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546 CLEAR_PENDING_EXCEPTION; |
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547 record_out_of_memory_failure(); |
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548 return ciConstant(); |
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549 } |
0 | 550 } |
551 ciObject* constant = get_object(string); | |
552 assert (constant->is_instance(), "must be an instance, or not? "); | |
553 return ciConstant(T_OBJECT, constant); | |
554 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
555 // 4881222: allow ldc to take a class type | |
1602 | 556 ciKlass* klass = get_klass_by_index_impl(cpool, index, ignore_will_link, accessor); |
0 | 557 if (HAS_PENDING_EXCEPTION) { |
558 CLEAR_PENDING_EXCEPTION; | |
559 record_out_of_memory_failure(); | |
560 return ciConstant(); | |
561 } | |
562 assert (klass->is_instance_klass() || klass->is_array_klass(), | |
563 "must be an instance or array klass "); | |
1602 | 564 return ciConstant(T_OBJECT, klass->java_mirror()); |
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565 } else if (tag.is_object()) { |
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566 oop obj = cpool->object_at(index); |
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567 assert(obj->is_instance(), "must be an instance"); |
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568 ciObject* ciobj = get_object(obj); |
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569 return ciConstant(T_OBJECT, ciobj); |
1602 | 570 } else if (tag.is_method_type()) { |
571 // must execute Java code to link this CP entry into cache[i].f1 | |
572 ciSymbol* signature = get_object(cpool->method_type_signature_at(index))->as_symbol(); | |
573 ciObject* ciobj = get_unloaded_method_type_constant(signature); | |
574 return ciConstant(T_OBJECT, ciobj); | |
575 } else if (tag.is_method_handle()) { | |
576 // must execute Java code to link this CP entry into cache[i].f1 | |
577 int ref_kind = cpool->method_handle_ref_kind_at(index); | |
578 int callee_index = cpool->method_handle_klass_index_at(index); | |
579 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor); | |
580 ciSymbol* name = get_object(cpool->method_handle_name_ref_at(index))->as_symbol(); | |
581 ciSymbol* signature = get_object(cpool->method_handle_signature_ref_at(index))->as_symbol(); | |
582 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind); | |
583 return ciConstant(T_OBJECT, ciobj); | |
0 | 584 } else { |
585 ShouldNotReachHere(); | |
586 return ciConstant(); | |
587 } | |
588 } | |
589 | |
590 // ------------------------------------------------------------------ | |
591 // ciEnv::get_constant_by_index | |
592 // | |
593 // Pull a constant out of the constant pool. How appropriate. | |
594 // | |
595 // Implementation note: this query is currently in no way cached. | |
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596 ciConstant ciEnv::get_constant_by_index(constantPoolHandle cpool, |
1602 | 597 int pool_index, int cache_index, |
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598 ciInstanceKlass* accessor) { |
1602 | 599 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);) |
0 | 600 } |
601 | |
602 // ------------------------------------------------------------------ | |
603 // ciEnv::get_field_by_index_impl | |
604 // | |
605 // Implementation of get_field_by_index. | |
606 // | |
607 // Implementation note: the results of field lookups are cached | |
608 // in the accessor klass. | |
609 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor, | |
610 int index) { | |
611 ciConstantPoolCache* cache = accessor->field_cache(); | |
612 if (cache == NULL) { | |
613 ciField* field = new (arena()) ciField(accessor, index); | |
614 return field; | |
615 } else { | |
616 ciField* field = (ciField*)cache->get(index); | |
617 if (field == NULL) { | |
618 field = new (arena()) ciField(accessor, index); | |
619 cache->insert(index, field); | |
620 } | |
621 return field; | |
622 } | |
623 } | |
624 | |
625 // ------------------------------------------------------------------ | |
626 // ciEnv::get_field_by_index | |
627 // | |
628 // Get a field by index from a klass's constant pool. | |
629 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor, | |
630 int index) { | |
631 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);) | |
632 } | |
633 | |
634 // ------------------------------------------------------------------ | |
635 // ciEnv::lookup_method | |
636 // | |
637 // Perform an appropriate method lookup based on accessor, holder, | |
638 // name, signature, and bytecode. | |
639 methodOop ciEnv::lookup_method(instanceKlass* accessor, | |
640 instanceKlass* holder, | |
641 symbolOop name, | |
642 symbolOop sig, | |
643 Bytecodes::Code bc) { | |
644 EXCEPTION_CONTEXT; | |
645 KlassHandle h_accessor(THREAD, accessor); | |
646 KlassHandle h_holder(THREAD, holder); | |
647 symbolHandle h_name(THREAD, name); | |
648 symbolHandle h_sig(THREAD, sig); | |
649 LinkResolver::check_klass_accessability(h_accessor, h_holder, KILL_COMPILE_ON_FATAL_(NULL)); | |
650 methodHandle dest_method; | |
651 switch (bc) { | |
652 case Bytecodes::_invokestatic: | |
653 dest_method = | |
654 LinkResolver::resolve_static_call_or_null(h_holder, h_name, h_sig, h_accessor); | |
655 break; | |
656 case Bytecodes::_invokespecial: | |
657 dest_method = | |
658 LinkResolver::resolve_special_call_or_null(h_holder, h_name, h_sig, h_accessor); | |
659 break; | |
660 case Bytecodes::_invokeinterface: | |
661 dest_method = | |
662 LinkResolver::linktime_resolve_interface_method_or_null(h_holder, h_name, h_sig, | |
663 h_accessor, true); | |
664 break; | |
665 case Bytecodes::_invokevirtual: | |
666 dest_method = | |
667 LinkResolver::linktime_resolve_virtual_method_or_null(h_holder, h_name, h_sig, | |
668 h_accessor, true); | |
669 break; | |
670 default: ShouldNotReachHere(); | |
671 } | |
672 | |
673 return dest_method(); | |
674 } | |
675 | |
676 | |
677 // ------------------------------------------------------------------ | |
678 // ciEnv::get_method_by_index_impl | |
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679 ciMethod* ciEnv::get_method_by_index_impl(constantPoolHandle cpool, |
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680 int index, Bytecodes::Code bc, |
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681 ciInstanceKlass* accessor) { |
0 | 682 int holder_index = cpool->klass_ref_index_at(index); |
683 bool holder_is_accessible; | |
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684 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor); |
0 | 685 ciInstanceKlass* declared_holder = get_instance_klass_for_declared_method_holder(holder); |
686 | |
687 // Get the method's name and signature. | |
688 symbolOop name_sym = cpool->name_ref_at(index); | |
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689 symbolOop sig_sym = cpool->signature_ref_at(index); |
0 | 690 |
691 if (holder_is_accessible) { // Our declared holder is loaded. | |
692 instanceKlass* lookup = declared_holder->get_instanceKlass(); | |
693 methodOop m = lookup_method(accessor->get_instanceKlass(), lookup, name_sym, sig_sym, bc); | |
694 if (m != NULL) { | |
695 // We found the method. | |
696 return get_object(m)->as_method(); | |
697 } | |
698 } | |
699 | |
700 // Either the declared holder was not loaded, or the method could | |
701 // not be found. Create a dummy ciMethod to represent the failed | |
702 // lookup. | |
703 | |
704 return get_unloaded_method(declared_holder, | |
705 get_object(name_sym)->as_symbol(), | |
706 get_object(sig_sym)->as_symbol()); | |
707 } | |
708 | |
709 | |
710 // ------------------------------------------------------------------ | |
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711 // ciEnv::get_fake_invokedynamic_method_impl |
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712 ciMethod* ciEnv::get_fake_invokedynamic_method_impl(constantPoolHandle cpool, |
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713 int index, Bytecodes::Code bc) { |
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714 // Compare the following logic with InterpreterRuntime::resolve_invokedynamic. |
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715 assert(bc == Bytecodes::_invokedynamic, "must be invokedynamic"); |
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716 |
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717 bool is_resolved = cpool->cache()->main_entry_at(index)->is_resolved(bc); |
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718 if (is_resolved && (oop) cpool->cache()->secondary_entry_at(index)->f1() == NULL) |
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719 // FIXME: code generation could allow for null (unlinked) call site |
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720 is_resolved = false; |
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721 |
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722 // Call site might not be resolved yet. We could create a real invoker method from the |
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723 // compiler, but it is simpler to stop the code path here with an unlinked method. |
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724 if (!is_resolved) { |
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725 ciInstanceKlass* mh_klass = get_object(SystemDictionary::MethodHandle_klass())->as_instance_klass(); |
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726 ciSymbol* sig_sym = get_object(cpool->signature_ref_at(index))->as_symbol(); |
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727 return get_unloaded_method(mh_klass, ciSymbol::invokeExact_name(), sig_sym); |
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728 } |
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729 |
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730 // Get the invoker methodOop from the constant pool. |
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731 oop f1_value = cpool->cache()->main_entry_at(index)->f1(); |
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732 methodOop signature_invoker = methodOop(f1_value); |
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733 assert(signature_invoker != NULL && signature_invoker->is_method() && signature_invoker->is_method_handle_invoke(), |
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734 "correct result from LinkResolver::resolve_invokedynamic"); |
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735 |
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736 return get_object(signature_invoker)->as_method(); |
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737 } |
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738 |
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739 |
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740 // ------------------------------------------------------------------ |
0 | 741 // ciEnv::get_instance_klass_for_declared_method_holder |
742 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) { | |
743 // For the case of <array>.clone(), the method holder can be a ciArrayKlass | |
744 // instead of a ciInstanceKlass. For that case simply pretend that the | |
745 // declared holder is Object.clone since that's where the call will bottom out. | |
746 // A more correct fix would trickle out through many interfaces in CI, | |
747 // requiring ciInstanceKlass* to become ciKlass* and many more places would | |
748 // require checks to make sure the expected type was found. Given that this | |
749 // only occurs for clone() the more extensive fix seems like overkill so | |
750 // instead we simply smear the array type into Object. | |
751 if (method_holder->is_instance_klass()) { | |
752 return method_holder->as_instance_klass(); | |
753 } else if (method_holder->is_array_klass()) { | |
754 return current()->Object_klass(); | |
755 } else { | |
756 ShouldNotReachHere(); | |
757 } | |
758 return NULL; | |
759 } | |
760 | |
761 | |
762 // ------------------------------------------------------------------ | |
763 // ciEnv::get_method_by_index | |
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764 ciMethod* ciEnv::get_method_by_index(constantPoolHandle cpool, |
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765 int index, Bytecodes::Code bc, |
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766 ciInstanceKlass* accessor) { |
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767 if (bc == Bytecodes::_invokedynamic) { |
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768 GUARDED_VM_ENTRY(return get_fake_invokedynamic_method_impl(cpool, index, bc);) |
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769 } else { |
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770 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);) |
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771 } |
0 | 772 } |
773 | |
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774 |
0 | 775 // ------------------------------------------------------------------ |
776 // ciEnv::name_buffer | |
777 char *ciEnv::name_buffer(int req_len) { | |
778 if (_name_buffer_len < req_len) { | |
779 if (_name_buffer == NULL) { | |
780 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len); | |
781 _name_buffer_len = req_len; | |
782 } else { | |
783 _name_buffer = | |
784 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len); | |
785 _name_buffer_len = req_len; | |
786 } | |
787 } | |
788 return _name_buffer; | |
789 } | |
790 | |
791 // ------------------------------------------------------------------ | |
792 // ciEnv::is_in_vm | |
793 bool ciEnv::is_in_vm() { | |
794 return JavaThread::current()->thread_state() == _thread_in_vm; | |
795 } | |
796 | |
797 bool ciEnv::system_dictionary_modification_counter_changed() { | |
798 return _system_dictionary_modification_counter != SystemDictionary::number_of_modifications(); | |
799 } | |
800 | |
801 // ------------------------------------------------------------------ | |
802 // ciEnv::check_for_system_dictionary_modification | |
803 // Check for changes to the system dictionary during compilation | |
804 // class loads, evolution, breakpoints | |
805 void ciEnv::check_for_system_dictionary_modification(ciMethod* target) { | |
806 if (failing()) return; // no need for further checks | |
807 | |
808 // Dependencies must be checked when the system dictionary changes. | |
809 // If logging is enabled all violated dependences will be recorded in | |
810 // the log. In debug mode check dependencies even if the system | |
811 // dictionary hasn't changed to verify that no invalid dependencies | |
812 // were inserted. Any violated dependences in this case are dumped to | |
813 // the tty. | |
814 | |
815 bool counter_changed = system_dictionary_modification_counter_changed(); | |
816 bool test_deps = counter_changed; | |
817 DEBUG_ONLY(test_deps = true); | |
818 if (!test_deps) return; | |
819 | |
820 bool print_failures = false; | |
821 DEBUG_ONLY(print_failures = !counter_changed); | |
822 | |
823 bool keep_going = (print_failures || xtty != NULL); | |
824 | |
825 int violated = 0; | |
826 | |
827 for (Dependencies::DepStream deps(dependencies()); deps.next(); ) { | |
828 klassOop witness = deps.check_dependency(); | |
829 if (witness != NULL) { | |
830 ++violated; | |
831 if (print_failures) deps.print_dependency(witness, /*verbose=*/ true); | |
832 // If there's no log and we're not sanity-checking, we're done. | |
833 if (!keep_going) break; | |
834 } | |
835 } | |
836 | |
837 if (violated != 0) { | |
838 assert(counter_changed, "failed dependencies, but counter didn't change"); | |
839 record_failure("concurrent class loading"); | |
840 } | |
841 } | |
842 | |
843 // ------------------------------------------------------------------ | |
844 // ciEnv::register_method | |
845 void ciEnv::register_method(ciMethod* target, | |
846 int entry_bci, | |
847 CodeOffsets* offsets, | |
848 int orig_pc_offset, | |
849 CodeBuffer* code_buffer, | |
850 int frame_words, | |
851 OopMapSet* oop_map_set, | |
852 ExceptionHandlerTable* handler_table, | |
853 ImplicitExceptionTable* inc_table, | |
854 AbstractCompiler* compiler, | |
855 int comp_level, | |
856 bool has_debug_info, | |
857 bool has_unsafe_access) { | |
858 VM_ENTRY_MARK; | |
859 nmethod* nm = NULL; | |
860 { | |
861 // To prevent compile queue updates. | |
862 MutexLocker locker(MethodCompileQueue_lock, THREAD); | |
863 | |
864 // Prevent SystemDictionary::add_to_hierarchy from running | |
865 // and invalidating our dependencies until we install this method. | |
866 MutexLocker ml(Compile_lock); | |
867 | |
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868 // Change in Jvmti state may invalidate compilation. |
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869 if (!failing() && |
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870 ( (!jvmti_can_hotswap_or_post_breakpoint() && |
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871 JvmtiExport::can_hotswap_or_post_breakpoint()) || |
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872 (!jvmti_can_access_local_variables() && |
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873 JvmtiExport::can_access_local_variables()) || |
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874 (!jvmti_can_post_on_exceptions() && |
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875 JvmtiExport::can_post_on_exceptions()) )) { |
780
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876 record_failure("Jvmti state change invalidated dependencies"); |
0 | 877 } |
878 | |
780
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879 // Change in DTrace flags may invalidate compilation. |
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880 if (!failing() && |
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881 ( (!dtrace_extended_probes() && ExtendedDTraceProbes) || |
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882 (!dtrace_method_probes() && DTraceMethodProbes) || |
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883 (!dtrace_alloc_probes() && DTraceAllocProbes) )) { |
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884 record_failure("DTrace flags change invalidated dependencies"); |
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885 } |
0 | 886 |
780
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887 if (!failing()) { |
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888 if (log() != NULL) { |
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889 // Log the dependencies which this compilation declares. |
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890 dependencies()->log_all_dependencies(); |
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891 } |
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892 |
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893 // Encode the dependencies now, so we can check them right away. |
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894 dependencies()->encode_content_bytes(); |
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895 |
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896 // Check for {class loads, evolution, breakpoints} during compilation |
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897 check_for_system_dictionary_modification(target); |
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898 } |
0 | 899 |
900 methodHandle method(THREAD, target->get_methodOop()); | |
901 | |
902 if (failing()) { | |
903 // While not a true deoptimization, it is a preemptive decompile. | |
904 methodDataOop mdo = method()->method_data(); | |
905 if (mdo != NULL) { | |
906 mdo->inc_decompile_count(); | |
907 } | |
908 | |
909 // All buffers in the CodeBuffer are allocated in the CodeCache. | |
910 // If the code buffer is created on each compile attempt | |
911 // as in C2, then it must be freed. | |
912 code_buffer->free_blob(); | |
913 return; | |
914 } | |
915 | |
916 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry"); | |
917 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry"); | |
918 | |
919 nm = nmethod::new_nmethod(method, | |
920 compile_id(), | |
921 entry_bci, | |
922 offsets, | |
923 orig_pc_offset, | |
924 debug_info(), dependencies(), code_buffer, | |
925 frame_words, oop_map_set, | |
926 handler_table, inc_table, | |
927 compiler, comp_level); | |
928 | |
929 // Free codeBlobs | |
930 code_buffer->free_blob(); | |
931 | |
932 // stress test 6243940 by immediately making the method | |
933 // non-entrant behind the system's back. This has serious | |
934 // side effects on the code cache and is not meant for | |
935 // general stress testing | |
936 if (nm != NULL && StressNonEntrant) { | |
937 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
938 NativeJump::patch_verified_entry(nm->entry_point(), nm->verified_entry_point(), | |
939 SharedRuntime::get_handle_wrong_method_stub()); | |
940 } | |
941 | |
942 if (nm == NULL) { | |
943 // The CodeCache is full. Print out warning and disable compilation. | |
944 record_failure("code cache is full"); | |
1202 | 945 { |
946 MutexUnlocker ml(Compile_lock); | |
947 MutexUnlocker locker(MethodCompileQueue_lock); | |
948 CompileBroker::handle_full_code_cache(); | |
0 | 949 } |
950 } else { | |
951 NOT_PRODUCT(nm->set_has_debug_info(has_debug_info); ) | |
952 nm->set_has_unsafe_access(has_unsafe_access); | |
953 | |
954 // Record successful registration. | |
955 // (Put nm into the task handle *before* publishing to the Java heap.) | |
956 if (task() != NULL) task()->set_code(nm); | |
957 | |
958 if (entry_bci == InvocationEntryBci) { | |
959 #ifdef TIERED | |
960 // If there is an old version we're done with it | |
961 nmethod* old = method->code(); | |
962 if (TraceMethodReplacement && old != NULL) { | |
963 ResourceMark rm; | |
964 char *method_name = method->name_and_sig_as_C_string(); | |
965 tty->print_cr("Replacing method %s", method_name); | |
966 } | |
967 if (old != NULL ) { | |
968 old->make_not_entrant(); | |
969 } | |
970 #endif // TIERED | |
971 if (TraceNMethodInstalls ) { | |
972 ResourceMark rm; | |
973 char *method_name = method->name_and_sig_as_C_string(); | |
974 ttyLocker ttyl; | |
975 tty->print_cr("Installing method (%d) %s ", | |
976 comp_level, | |
977 method_name); | |
978 } | |
979 // Allow the code to be executed | |
980 method->set_code(method, nm); | |
981 } else { | |
982 if (TraceNMethodInstalls ) { | |
983 ResourceMark rm; | |
984 char *method_name = method->name_and_sig_as_C_string(); | |
985 ttyLocker ttyl; | |
986 tty->print_cr("Installing osr method (%d) %s @ %d", | |
987 comp_level, | |
988 method_name, | |
989 entry_bci); | |
990 } | |
991 instanceKlass::cast(method->method_holder())->add_osr_nmethod(nm); | |
992 | |
993 } | |
994 } | |
995 } | |
996 // JVMTI -- compiled method notification (must be done outside lock) | |
997 if (nm != NULL) { | |
998 nm->post_compiled_method_load_event(); | |
999 } | |
1000 | |
1001 } | |
1002 | |
1003 | |
1004 // ------------------------------------------------------------------ | |
1005 // ciEnv::find_system_klass | |
1006 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) { | |
1007 VM_ENTRY_MARK; | |
1008 return get_klass_by_name_impl(NULL, klass_name, false); | |
1009 } | |
1010 | |
1011 // ------------------------------------------------------------------ | |
1012 // ciEnv::comp_level | |
1013 int ciEnv::comp_level() { | |
1014 if (task() == NULL) return CompLevel_full_optimization; | |
1015 return task()->comp_level(); | |
1016 } | |
1017 | |
1018 // ------------------------------------------------------------------ | |
1019 // ciEnv::compile_id | |
1020 uint ciEnv::compile_id() { | |
1021 if (task() == NULL) return 0; | |
1022 return task()->compile_id(); | |
1023 } | |
1024 | |
1025 // ------------------------------------------------------------------ | |
1026 // ciEnv::notice_inlined_method() | |
1027 void ciEnv::notice_inlined_method(ciMethod* method) { | |
1028 _num_inlined_bytecodes += method->code_size(); | |
1029 } | |
1030 | |
1031 // ------------------------------------------------------------------ | |
1032 // ciEnv::num_inlined_bytecodes() | |
1033 int ciEnv::num_inlined_bytecodes() const { | |
1034 return _num_inlined_bytecodes; | |
1035 } | |
1036 | |
1037 // ------------------------------------------------------------------ | |
1038 // ciEnv::record_failure() | |
1039 void ciEnv::record_failure(const char* reason) { | |
1040 if (log() != NULL) { | |
1041 log()->elem("failure reason='%s'", reason); | |
1042 } | |
1043 if (_failure_reason == NULL) { | |
1044 // Record the first failure reason. | |
1045 _failure_reason = reason; | |
1046 } | |
1047 } | |
1048 | |
1049 // ------------------------------------------------------------------ | |
1050 // ciEnv::record_method_not_compilable() | |
1051 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) { | |
1052 int new_compilable = | |
1053 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ; | |
1054 | |
1055 // Only note transitions to a worse state | |
1056 if (new_compilable > _compilable) { | |
1057 if (log() != NULL) { | |
1058 if (all_tiers) { | |
1059 log()->elem("method_not_compilable"); | |
1060 } else { | |
1061 log()->elem("method_not_compilable_at_tier"); | |
1062 } | |
1063 } | |
1064 _compilable = new_compilable; | |
1065 | |
1066 // Reset failure reason; this one is more important. | |
1067 _failure_reason = NULL; | |
1068 record_failure(reason); | |
1069 } | |
1070 } | |
1071 | |
1072 // ------------------------------------------------------------------ | |
1073 // ciEnv::record_out_of_memory_failure() | |
1074 void ciEnv::record_out_of_memory_failure() { | |
1075 // If memory is low, we stop compiling methods. | |
1076 record_method_not_compilable("out of memory"); | |
1077 } |