Mercurial > hg > truffle
annotate src/share/vm/ci/ciEnv.hpp @ 3746:537a4053b0f9
7042740: CMS: assert(n> q) failed: Looping at: ... blockOffsetTable.cpp:557
Summary: Do a one-step look-ahead, when sweeping free or garbage blocks, to avoid overstepping sweep limit, which may become a non-block-boundary because of a heap expansion delta coalescing with a previously co-terminal free block.
Reviewed-by: brutisso, tonyp
author | ysr |
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date | Mon, 23 May 2011 16:42:14 -0700 |
parents | 1d1603768966 |
children | 0654ee04b214 81d815b05abb |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2011, 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 #ifndef SHARE_VM_CI_CIENV_HPP |
26 #define SHARE_VM_CI_CIENV_HPP | |
27 | |
28 #include "ci/ciClassList.hpp" | |
29 #include "ci/ciObjectFactory.hpp" | |
30 #include "classfile/systemDictionary.hpp" | |
31 #include "code/debugInfoRec.hpp" | |
32 #include "code/dependencies.hpp" | |
33 #include "code/exceptionHandlerTable.hpp" | |
34 #include "compiler/oopMap.hpp" | |
35 #include "runtime/thread.hpp" | |
36 | |
0 | 37 class CompileTask; |
38 | |
39 // ciEnv | |
40 // | |
41 // This class is the top level broker for requests from the compiler | |
42 // to the VM. | |
43 class ciEnv : StackObj { | |
44 CI_PACKAGE_ACCESS_TO | |
45 | |
46 friend class CompileBroker; | |
47 friend class Dependencies; // for get_object, during logging | |
48 | |
49 private: | |
50 Arena* _arena; // Alias for _ciEnv_arena except in init_shared_objects() | |
51 Arena _ciEnv_arena; | |
52 int _system_dictionary_modification_counter; | |
53 ciObjectFactory* _factory; | |
54 OopRecorder* _oop_recorder; | |
55 DebugInformationRecorder* _debug_info; | |
56 Dependencies* _dependencies; | |
57 const char* _failure_reason; | |
58 int _compilable; | |
59 bool _break_at_compile; | |
60 int _num_inlined_bytecodes; | |
61 CompileTask* _task; // faster access to CompilerThread::task | |
62 CompileLog* _log; // faster access to CompilerThread::log | |
63 void* _compiler_data; // compiler-specific stuff, if any | |
64 | |
65 char* _name_buffer; | |
66 int _name_buffer_len; | |
67 | |
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68 // Cache Jvmti state |
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69 bool _jvmti_can_hotswap_or_post_breakpoint; |
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70 bool _jvmti_can_access_local_variables; |
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71 bool _jvmti_can_post_on_exceptions; |
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72 |
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73 // Cache DTrace flags |
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74 bool _dtrace_extended_probes; |
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75 bool _dtrace_monitor_probes; |
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76 bool _dtrace_method_probes; |
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77 bool _dtrace_alloc_probes; |
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78 |
0 | 79 // Distinguished instances of certain ciObjects.. |
80 static ciObject* _null_object_instance; | |
81 static ciMethodKlass* _method_klass_instance; | |
82 static ciKlassKlass* _klass_klass_instance; | |
83 static ciInstanceKlassKlass* _instance_klass_klass_instance; | |
84 static ciTypeArrayKlassKlass* _type_array_klass_klass_instance; | |
85 static ciObjArrayKlassKlass* _obj_array_klass_klass_instance; | |
86 | |
1142 | 87 #define WK_KLASS_DECL(name, ignore_s, ignore_o) static ciInstanceKlass* _##name; |
88 WK_KLASSES_DO(WK_KLASS_DECL) | |
89 #undef WK_KLASS_DECL | |
0 | 90 |
91 static ciSymbol* _unloaded_cisymbol; | |
92 static ciInstanceKlass* _unloaded_ciinstance_klass; | |
93 static ciObjArrayKlass* _unloaded_ciobjarrayklass; | |
94 | |
95 static jobject _ArrayIndexOutOfBoundsException_handle; | |
96 static jobject _ArrayStoreException_handle; | |
97 static jobject _ClassCastException_handle; | |
98 | |
99 ciInstance* _NullPointerException_instance; | |
100 ciInstance* _ArithmeticException_instance; | |
101 ciInstance* _ArrayIndexOutOfBoundsException_instance; | |
102 ciInstance* _ArrayStoreException_instance; | |
103 ciInstance* _ClassCastException_instance; | |
104 | |
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105 ciInstance* _the_null_string; // The Java string "null" |
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106 ciInstance* _the_min_jint_string; // The Java string "-2147483648" |
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107 |
0 | 108 // Look up a klass by name from a particular class loader (the accessor's). |
109 // If require_local, result must be defined in that class loader, or NULL. | |
110 // If !require_local, a result from remote class loader may be reported, | |
111 // if sufficient class loader constraints exist such that initiating | |
112 // a class loading request from the given loader is bound to return | |
113 // the class defined in the remote loader (or throw an error). | |
114 // | |
115 // Return an unloaded klass if !require_local and no class at all is found. | |
116 // | |
117 // The CI treats a klass as loaded if it is consistently defined in | |
118 // another loader, even if it hasn't yet been loaded in all loaders | |
119 // that could potentially see it via delegation. | |
120 ciKlass* get_klass_by_name(ciKlass* accessing_klass, | |
121 ciSymbol* klass_name, | |
122 bool require_local); | |
123 | |
124 // Constant pool access. | |
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125 ciKlass* get_klass_by_index(constantPoolHandle cpool, |
0 | 126 int klass_index, |
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127 bool& is_accessible, |
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128 ciInstanceKlass* loading_klass); |
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129 ciConstant get_constant_by_index(constantPoolHandle cpool, |
1602 | 130 int pool_index, int cache_index, |
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131 ciInstanceKlass* accessor); |
0 | 132 ciField* get_field_by_index(ciInstanceKlass* loading_klass, |
133 int field_index); | |
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134 ciMethod* get_method_by_index(constantPoolHandle cpool, |
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135 int method_index, Bytecodes::Code bc, |
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136 ciInstanceKlass* loading_klass); |
0 | 137 |
138 // Implementation methods for loading and constant pool access. | |
139 ciKlass* get_klass_by_name_impl(ciKlass* accessing_klass, | |
140 ciSymbol* klass_name, | |
141 bool require_local); | |
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142 ciKlass* get_klass_by_index_impl(constantPoolHandle cpool, |
0 | 143 int klass_index, |
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144 bool& is_accessible, |
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145 ciInstanceKlass* loading_klass); |
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146 ciConstant get_constant_by_index_impl(constantPoolHandle cpool, |
1602 | 147 int pool_index, int cache_index, |
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148 ciInstanceKlass* loading_klass); |
0 | 149 ciField* get_field_by_index_impl(ciInstanceKlass* loading_klass, |
150 int field_index); | |
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151 ciMethod* get_method_by_index_impl(constantPoolHandle cpool, |
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152 int method_index, Bytecodes::Code bc, |
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153 ciInstanceKlass* loading_klass); |
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154 ciMethod* get_fake_invokedynamic_method_impl(constantPoolHandle cpool, |
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155 int index, Bytecodes::Code bc); |
0 | 156 |
157 // Helper methods | |
158 bool check_klass_accessibility(ciKlass* accessing_klass, | |
159 klassOop resolved_klassOop); | |
160 methodOop lookup_method(instanceKlass* accessor, | |
161 instanceKlass* holder, | |
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162 Symbol* name, |
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163 Symbol* sig, |
0 | 164 Bytecodes::Code bc); |
165 | |
166 // Get a ciObject from the object factory. Ensures uniqueness | |
167 // of ciObjects. | |
168 ciObject* get_object(oop o) { | |
169 if (o == NULL) { | |
170 return _null_object_instance; | |
171 } else { | |
172 return _factory->get(o); | |
173 } | |
174 } | |
175 | |
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176 ciSymbol* get_symbol(Symbol* o) { |
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177 if (o == NULL) { |
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178 ShouldNotReachHere(); |
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179 return NULL; |
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180 } else { |
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181 return _factory->get_symbol(o); |
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182 } |
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183 } |
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184 |
0 | 185 ciMethod* get_method_from_handle(jobject method); |
186 | |
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187 ciInstance* get_or_create_exception(jobject& handle, Symbol* name); |
0 | 188 |
189 // Get a ciMethod representing either an unfound method or | |
190 // a method with an unloaded holder. Ensures uniqueness of | |
191 // the result. | |
192 ciMethod* get_unloaded_method(ciInstanceKlass* holder, | |
193 ciSymbol* name, | |
194 ciSymbol* signature) { | |
195 return _factory->get_unloaded_method(holder, name, signature); | |
196 } | |
197 | |
198 // Get a ciKlass representing an unloaded klass. | |
199 // Ensures uniqueness of the result. | |
200 ciKlass* get_unloaded_klass(ciKlass* accessing_klass, | |
201 ciSymbol* name) { | |
202 return _factory->get_unloaded_klass(accessing_klass, name, true); | |
203 } | |
204 | |
1602 | 205 // Get a ciKlass representing an unloaded klass mirror. |
206 // Result is not necessarily unique, but will be unloaded. | |
207 ciInstance* get_unloaded_klass_mirror(ciKlass* type) { | |
208 return _factory->get_unloaded_klass_mirror(type); | |
209 } | |
210 | |
211 // Get a ciInstance representing an unresolved method handle constant. | |
212 ciInstance* get_unloaded_method_handle_constant(ciKlass* holder, | |
213 ciSymbol* name, | |
214 ciSymbol* signature, | |
215 int ref_kind) { | |
216 return _factory->get_unloaded_method_handle_constant(holder, name, signature, ref_kind); | |
217 } | |
218 | |
219 // Get a ciInstance representing an unresolved method type constant. | |
220 ciInstance* get_unloaded_method_type_constant(ciSymbol* signature) { | |
221 return _factory->get_unloaded_method_type_constant(signature); | |
222 } | |
223 | |
0 | 224 // See if we already have an unloaded klass for the given name |
225 // or return NULL if not. | |
226 ciKlass *check_get_unloaded_klass(ciKlass* accessing_klass, ciSymbol* name) { | |
227 return _factory->get_unloaded_klass(accessing_klass, name, false); | |
228 } | |
229 | |
230 // Get a ciReturnAddress corresponding to the given bci. | |
231 // Ensures uniqueness of the result. | |
232 ciReturnAddress* get_return_address(int bci) { | |
233 return _factory->get_return_address(bci); | |
234 } | |
235 | |
236 // Get a ciMethodData representing the methodData for a method | |
237 // with none. | |
238 ciMethodData* get_empty_methodData() { | |
239 return _factory->get_empty_methodData(); | |
240 } | |
241 | |
242 // General utility : get a buffer of some required length. | |
243 // Used in symbol creation. | |
244 char* name_buffer(int req_len); | |
245 | |
246 // Is this thread currently in the VM state? | |
247 static bool is_in_vm(); | |
248 | |
249 // Helper routine for determining the validity of a compilation | |
250 // with respect to concurrent class loading. | |
251 void check_for_system_dictionary_modification(ciMethod* target); | |
252 | |
253 public: | |
254 enum { | |
255 MethodCompilable, | |
256 MethodCompilable_not_at_tier, | |
257 MethodCompilable_never | |
258 }; | |
259 | |
260 ciEnv(CompileTask* task, int system_dictionary_modification_counter); | |
261 // Used only during initialization of the ci | |
262 ciEnv(Arena* arena); | |
263 ~ciEnv(); | |
264 | |
265 OopRecorder* oop_recorder() { return _oop_recorder; } | |
266 void set_oop_recorder(OopRecorder* r) { _oop_recorder = r; } | |
267 | |
268 DebugInformationRecorder* debug_info() { return _debug_info; } | |
269 void set_debug_info(DebugInformationRecorder* i) { _debug_info = i; } | |
270 | |
271 Dependencies* dependencies() { return _dependencies; } | |
272 void set_dependencies(Dependencies* d) { _dependencies = d; } | |
273 | |
274 // This is true if the compilation is not going to produce code. | |
275 // (It is reasonable to retry failed compilations.) | |
276 bool failing() { return _failure_reason != NULL; } | |
277 | |
278 // Reason this compilation is failing, such as "too many basic blocks". | |
279 const char* failure_reason() { return _failure_reason; } | |
280 | |
281 // Return state of appropriate compilability | |
282 int compilable() { return _compilable; } | |
283 | |
284 bool break_at_compile() { return _break_at_compile; } | |
285 void set_break_at_compile(bool z) { _break_at_compile = z; } | |
286 | |
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287 // Cache Jvmti state |
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288 void cache_jvmti_state(); |
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289 bool jvmti_can_hotswap_or_post_breakpoint() const { return _jvmti_can_hotswap_or_post_breakpoint; } |
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290 bool jvmti_can_access_local_variables() const { return _jvmti_can_access_local_variables; } |
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291 bool jvmti_can_post_on_exceptions() const { return _jvmti_can_post_on_exceptions; } |
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292 |
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293 // Cache DTrace flags |
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294 void cache_dtrace_flags(); |
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295 bool dtrace_extended_probes() const { return _dtrace_extended_probes; } |
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296 bool dtrace_monitor_probes() const { return _dtrace_monitor_probes; } |
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297 bool dtrace_method_probes() const { return _dtrace_method_probes; } |
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298 bool dtrace_alloc_probes() const { return _dtrace_alloc_probes; } |
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299 |
0 | 300 // The compiler task which has created this env. |
301 // May be useful to find out compile_id, comp_level, etc. | |
302 CompileTask* task() { return _task; } | |
303 // Handy forwards to the task: | |
304 int comp_level(); // task()->comp_level() | |
305 uint compile_id(); // task()->compile_id() | |
306 | |
307 // Register the result of a compilation. | |
308 void register_method(ciMethod* target, | |
309 int entry_bci, | |
310 CodeOffsets* offsets, | |
311 int orig_pc_offset, | |
312 CodeBuffer* code_buffer, | |
313 int frame_words, | |
314 OopMapSet* oop_map_set, | |
315 ExceptionHandlerTable* handler_table, | |
316 ImplicitExceptionTable* inc_table, | |
317 AbstractCompiler* compiler, | |
318 int comp_level, | |
319 bool has_debug_info = true, | |
320 bool has_unsafe_access = false); | |
321 | |
322 | |
323 // Access to certain well known ciObjects. | |
1142 | 324 #define WK_KLASS_FUNC(name, ignore_s, ignore_o) \ |
325 ciInstanceKlass* name() { \ | |
326 return _##name;\ | |
0 | 327 } |
1142 | 328 WK_KLASSES_DO(WK_KLASS_FUNC) |
329 #undef WK_KLASS_FUNC | |
330 | |
0 | 331 ciInstance* NullPointerException_instance() { |
332 assert(_NullPointerException_instance != NULL, "initialization problem"); | |
333 return _NullPointerException_instance; | |
334 } | |
335 ciInstance* ArithmeticException_instance() { | |
336 assert(_ArithmeticException_instance != NULL, "initialization problem"); | |
337 return _ArithmeticException_instance; | |
338 } | |
339 | |
340 // Lazy constructors: | |
341 ciInstance* ArrayIndexOutOfBoundsException_instance(); | |
342 ciInstance* ArrayStoreException_instance(); | |
343 ciInstance* ClassCastException_instance(); | |
344 | |
1080
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345 ciInstance* the_null_string(); |
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346 ciInstance* the_min_jint_string(); |
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347 |
0 | 348 static ciSymbol* unloaded_cisymbol() { |
349 return _unloaded_cisymbol; | |
350 } | |
351 static ciObjArrayKlass* unloaded_ciobjarrayklass() { | |
352 return _unloaded_ciobjarrayklass; | |
353 } | |
354 static ciInstanceKlass* unloaded_ciinstance_klass() { | |
355 return _unloaded_ciinstance_klass; | |
356 } | |
357 | |
358 ciKlass* find_system_klass(ciSymbol* klass_name); | |
359 // Note: To find a class from its name string, use ciSymbol::make, | |
360 // but consider adding to vmSymbols.hpp instead. | |
361 | |
362 // Use this to make a holder for non-perm compile time constants. | |
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363 // The resulting array is guaranteed to satisfy "can_be_constant". |
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364 ciArray* make_system_array(GrowableArray<ciObject*>* objects); |
0 | 365 |
366 // converts the ciKlass* representing the holder of a method into a | |
367 // ciInstanceKlass*. This is needed since the holder of a method in | |
368 // the bytecodes could be an array type. Basically this converts | |
369 // array types into java/lang/Object and other types stay as they are. | |
370 static ciInstanceKlass* get_instance_klass_for_declared_method_holder(ciKlass* klass); | |
371 | |
372 // Return the machine-level offset of o, which must be an element of a. | |
373 // This may be used to form constant-loading expressions in lieu of simpler encodings. | |
374 int array_element_offset_in_bytes(ciArray* a, ciObject* o); | |
375 | |
376 // Access to the compile-lifetime allocation arena. | |
377 Arena* arena() { return _arena; } | |
378 | |
379 // What is the current compilation environment? | |
380 static ciEnv* current() { return CompilerThread::current()->env(); } | |
381 | |
382 // Overload with current thread argument | |
383 static ciEnv* current(CompilerThread *thread) { return thread->env(); } | |
384 | |
385 // Per-compiler data. (Used by C2 to publish the Compile* pointer.) | |
386 void* compiler_data() { return _compiler_data; } | |
387 void set_compiler_data(void* x) { _compiler_data = x; } | |
388 | |
389 // Notice that a method has been inlined in the current compile; | |
390 // used only for statistics. | |
391 void notice_inlined_method(ciMethod* method); | |
392 | |
393 // Total number of bytecodes in inlined methods in this compile | |
394 int num_inlined_bytecodes() const; | |
395 | |
396 // Output stream for logging compilation info. | |
397 CompileLog* log() { return _log; } | |
398 void set_log(CompileLog* log) { _log = log; } | |
399 | |
400 // Check for changes to the system dictionary during compilation | |
401 bool system_dictionary_modification_counter_changed(); | |
402 | |
403 void record_failure(const char* reason); | |
404 void record_method_not_compilable(const char* reason, bool all_tiers = true); | |
405 void record_out_of_memory_failure(); | |
406 }; | |
1972 | 407 |
408 #endif // SHARE_VM_CI_CIENV_HPP |