Mercurial > hg > truffle
annotate src/share/vm/ci/ciEnv.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 7f813940ac35 |
| children | 137868b7aa6f |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "ci/ciConstant.hpp" | |
| 27 #include "ci/ciEnv.hpp" | |
| 28 #include "ci/ciField.hpp" | |
| 29 #include "ci/ciInstance.hpp" | |
| 30 #include "ci/ciInstanceKlass.hpp" | |
| 31 #include "ci/ciMethod.hpp" | |
| 32 #include "ci/ciNullObject.hpp" | |
| 33 #include "ci/ciUtilities.hpp" | |
| 34 #include "classfile/systemDictionary.hpp" | |
| 35 #include "classfile/vmSymbols.hpp" | |
| 36 #include "code/scopeDesc.hpp" | |
| 37 #include "compiler/compileBroker.hpp" | |
| 38 #include "compiler/compileLog.hpp" | |
| 39 #include "compiler/compilerOracle.hpp" | |
| 40 #include "gc_interface/collectedHeap.inline.hpp" | |
| 41 #include "interpreter/linkResolver.hpp" | |
| 42 #include "memory/allocation.inline.hpp" | |
| 43 #include "memory/oopFactory.hpp" | |
| 44 #include "memory/universe.inline.hpp" | |
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45 #include "oops/methodData.hpp" |
| 1972 | 46 #include "oops/objArrayKlass.hpp" |
| 47 #include "oops/oop.inline.hpp" | |
| 48 #include "oops/oop.inline2.hpp" | |
| 49 #include "prims/jvmtiExport.hpp" | |
| 50 #include "runtime/init.hpp" | |
| 51 #include "runtime/reflection.hpp" | |
| 52 #include "runtime/sharedRuntime.hpp" | |
| 53 #include "utilities/dtrace.hpp" | |
| 54 #ifdef COMPILER1 | |
| 55 #include "c1/c1_Runtime1.hpp" | |
| 56 #endif | |
| 57 #ifdef COMPILER2 | |
| 58 #include "opto/runtime.hpp" | |
| 59 #endif | |
| 0 | 60 |
| 61 // ciEnv | |
| 62 // | |
| 63 // This class is the top level broker for requests from the compiler | |
| 64 // to the VM. | |
| 65 | |
| 66 ciObject* ciEnv::_null_object_instance; | |
| 67 | |
| 1142 | 68 #define WK_KLASS_DEFN(name, ignore_s, ignore_o) ciInstanceKlass* ciEnv::_##name = NULL; |
| 69 WK_KLASSES_DO(WK_KLASS_DEFN) | |
| 70 #undef WK_KLASS_DEFN | |
| 0 | 71 |
| 72 ciSymbol* ciEnv::_unloaded_cisymbol = NULL; | |
| 73 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = NULL; | |
| 74 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = NULL; | |
| 75 | |
| 76 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = NULL; | |
| 77 jobject ciEnv::_ArrayStoreException_handle = NULL; | |
| 78 jobject ciEnv::_ClassCastException_handle = NULL; | |
| 79 | |
| 80 #ifndef PRODUCT | |
| 81 static bool firstEnv = true; | |
| 82 #endif /* PRODUCT */ | |
| 83 | |
| 84 // ------------------------------------------------------------------ | |
| 85 // ciEnv::ciEnv | |
| 86 ciEnv::ciEnv(CompileTask* task, int system_dictionary_modification_counter) { | |
| 87 VM_ENTRY_MARK; | |
| 88 | |
| 89 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc. | |
| 90 thread->set_env(this); | |
| 91 assert(ciEnv::current() == this, "sanity"); | |
| 92 | |
| 93 _oop_recorder = NULL; | |
| 94 _debug_info = NULL; | |
| 95 _dependencies = NULL; | |
| 96 _failure_reason = NULL; | |
| 97 _compilable = MethodCompilable; | |
| 98 _break_at_compile = false; | |
| 99 _compiler_data = NULL; | |
| 100 #ifndef PRODUCT | |
| 101 assert(!firstEnv, "not initialized properly"); | |
| 102 #endif /* !PRODUCT */ | |
| 103 | |
| 104 _system_dictionary_modification_counter = system_dictionary_modification_counter; | |
| 105 _num_inlined_bytecodes = 0; | |
| 106 assert(task == NULL || thread->task() == task, "sanity"); | |
| 107 _task = task; | |
| 108 _log = NULL; | |
| 109 | |
| 110 // Temporary buffer for creating symbols and such. | |
| 111 _name_buffer = NULL; | |
| 112 _name_buffer_len = 0; | |
| 113 | |
| 114 _arena = &_ciEnv_arena; | |
| 115 _factory = new (_arena) ciObjectFactory(_arena, 128); | |
| 116 | |
| 117 // Preload commonly referenced system ciObjects. | |
| 118 | |
| 119 // During VM initialization, these instances have not yet been created. | |
| 120 // Assertions ensure that these instances are not accessed before | |
| 121 // their initialization. | |
| 122 | |
| 123 assert(Universe::is_fully_initialized(), "should be complete"); | |
| 124 | |
| 125 oop o = Universe::null_ptr_exception_instance(); | |
| 126 assert(o != NULL, "should have been initialized"); | |
| 127 _NullPointerException_instance = get_object(o)->as_instance(); | |
| 128 o = Universe::arithmetic_exception_instance(); | |
| 129 assert(o != NULL, "should have been initialized"); | |
| 130 _ArithmeticException_instance = get_object(o)->as_instance(); | |
| 131 | |
| 132 _ArrayIndexOutOfBoundsException_instance = NULL; | |
| 133 _ArrayStoreException_instance = NULL; | |
| 134 _ClassCastException_instance = NULL; | |
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135 _the_null_string = NULL; |
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136 _the_min_jint_string = NULL; |
| 0 | 137 } |
| 138 | |
| 139 ciEnv::ciEnv(Arena* arena) { | |
| 140 ASSERT_IN_VM; | |
| 141 | |
| 142 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc. | |
| 143 CompilerThread* current_thread = CompilerThread::current(); | |
| 144 assert(current_thread->env() == NULL, "must be"); | |
| 145 current_thread->set_env(this); | |
| 146 assert(ciEnv::current() == this, "sanity"); | |
| 147 | |
| 148 _oop_recorder = NULL; | |
| 149 _debug_info = NULL; | |
| 150 _dependencies = NULL; | |
| 151 _failure_reason = NULL; | |
| 152 _compilable = MethodCompilable_never; | |
| 153 _break_at_compile = false; | |
| 154 _compiler_data = NULL; | |
| 155 #ifndef PRODUCT | |
| 156 assert(firstEnv, "must be first"); | |
| 157 firstEnv = false; | |
| 158 #endif /* !PRODUCT */ | |
| 159 | |
| 160 _system_dictionary_modification_counter = 0; | |
| 161 _num_inlined_bytecodes = 0; | |
| 162 _task = NULL; | |
| 163 _log = NULL; | |
| 164 | |
| 165 // Temporary buffer for creating symbols and such. | |
| 166 _name_buffer = NULL; | |
| 167 _name_buffer_len = 0; | |
| 168 | |
| 169 _arena = arena; | |
| 170 _factory = new (_arena) ciObjectFactory(_arena, 128); | |
| 171 | |
| 172 // Preload commonly referenced system ciObjects. | |
| 173 | |
| 174 // During VM initialization, these instances have not yet been created. | |
| 175 // Assertions ensure that these instances are not accessed before | |
| 176 // their initialization. | |
| 177 | |
| 178 assert(Universe::is_fully_initialized(), "must be"); | |
| 179 | |
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180 _NullPointerException_instance = NULL; |
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181 _ArithmeticException_instance = NULL; |
| 0 | 182 _ArrayIndexOutOfBoundsException_instance = NULL; |
| 183 _ArrayStoreException_instance = NULL; | |
| 184 _ClassCastException_instance = NULL; | |
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185 _the_null_string = NULL; |
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186 _the_min_jint_string = NULL; |
| 0 | 187 } |
| 188 | |
| 189 ciEnv::~ciEnv() { | |
| 190 CompilerThread* current_thread = CompilerThread::current(); | |
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191 _factory->remove_symbols(); |
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192 // Need safepoint to clear the env on the thread. RedefineClasses might |
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193 // be reading it. |
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194 GUARDED_VM_ENTRY(current_thread->set_env(NULL);) |
| 0 | 195 } |
| 196 | |
| 197 // ------------------------------------------------------------------ | |
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198 // Cache Jvmti state |
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199 void ciEnv::cache_jvmti_state() { |
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200 VM_ENTRY_MARK; |
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201 // Get Jvmti capabilities under lock to get consistant values. |
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202 MutexLocker mu(JvmtiThreadState_lock); |
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203 _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint(); |
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204 _jvmti_can_access_local_variables = JvmtiExport::can_access_local_variables(); |
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205 _jvmti_can_post_on_exceptions = JvmtiExport::can_post_on_exceptions(); |
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206 } |
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207 |
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208 // ------------------------------------------------------------------ |
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209 // Cache DTrace flags |
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210 void ciEnv::cache_dtrace_flags() { |
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211 // Need lock? |
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212 _dtrace_extended_probes = ExtendedDTraceProbes; |
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213 if (_dtrace_extended_probes) { |
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214 _dtrace_monitor_probes = true; |
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215 _dtrace_method_probes = true; |
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216 _dtrace_alloc_probes = true; |
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217 } else { |
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218 _dtrace_monitor_probes = DTraceMonitorProbes; |
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219 _dtrace_method_probes = DTraceMethodProbes; |
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220 _dtrace_alloc_probes = DTraceAllocProbes; |
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221 } |
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222 } |
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223 |
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224 // ------------------------------------------------------------------ |
| 0 | 225 // helper for lazy exception creation |
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226 ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) { |
| 0 | 227 VM_ENTRY_MARK; |
| 228 if (handle == NULL) { | |
| 229 // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance. | |
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230 Klass* k = SystemDictionary::find(name, Handle(), Handle(), THREAD); |
| 0 | 231 jobject objh = NULL; |
| 232 if (!HAS_PENDING_EXCEPTION && k != NULL) { | |
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233 oop obj = InstanceKlass::cast(k)->allocate_instance(THREAD); |
| 0 | 234 if (!HAS_PENDING_EXCEPTION) |
| 235 objh = JNIHandles::make_global(obj); | |
| 236 } | |
| 237 if (HAS_PENDING_EXCEPTION) { | |
| 238 CLEAR_PENDING_EXCEPTION; | |
| 239 } else { | |
| 240 handle = objh; | |
| 241 } | |
| 242 } | |
| 243 oop obj = JNIHandles::resolve(handle); | |
| 244 return obj == NULL? NULL: get_object(obj)->as_instance(); | |
| 245 } | |
| 246 | |
| 247 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() { | |
| 248 if (_ArrayIndexOutOfBoundsException_instance == NULL) { | |
| 249 _ArrayIndexOutOfBoundsException_instance | |
| 250 = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle, | |
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251 vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); |
| 0 | 252 } |
| 253 return _ArrayIndexOutOfBoundsException_instance; | |
| 254 } | |
| 255 ciInstance* ciEnv::ArrayStoreException_instance() { | |
| 256 if (_ArrayStoreException_instance == NULL) { | |
| 257 _ArrayStoreException_instance | |
| 258 = get_or_create_exception(_ArrayStoreException_handle, | |
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259 vmSymbols::java_lang_ArrayStoreException()); |
| 0 | 260 } |
| 261 return _ArrayStoreException_instance; | |
| 262 } | |
| 263 ciInstance* ciEnv::ClassCastException_instance() { | |
| 264 if (_ClassCastException_instance == NULL) { | |
| 265 _ClassCastException_instance | |
| 266 = get_or_create_exception(_ClassCastException_handle, | |
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267 vmSymbols::java_lang_ClassCastException()); |
| 0 | 268 } |
| 269 return _ClassCastException_instance; | |
| 270 } | |
| 271 | |
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272 ciInstance* ciEnv::the_null_string() { |
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273 if (_the_null_string == NULL) { |
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274 VM_ENTRY_MARK; |
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275 _the_null_string = get_object(Universe::the_null_string())->as_instance(); |
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276 } |
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277 return _the_null_string; |
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278 } |
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279 |
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280 ciInstance* ciEnv::the_min_jint_string() { |
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281 if (_the_min_jint_string == NULL) { |
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282 VM_ENTRY_MARK; |
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283 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance(); |
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284 } |
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285 return _the_min_jint_string; |
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286 } |
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287 |
| 0 | 288 // ------------------------------------------------------------------ |
| 289 // ciEnv::get_method_from_handle | |
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290 ciMethod* ciEnv::get_method_from_handle(Method* method) { |
| 0 | 291 VM_ENTRY_MARK; |
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292 return get_metadata(method)->as_method(); |
| 0 | 293 } |
| 294 | |
| 295 // ------------------------------------------------------------------ | |
| 296 // ciEnv::array_element_offset_in_bytes | |
| 297 int ciEnv::array_element_offset_in_bytes(ciArray* a_h, ciObject* o_h) { | |
| 298 VM_ENTRY_MARK; | |
| 299 objArrayOop a = (objArrayOop)a_h->get_oop(); | |
| 300 assert(a->is_objArray(), ""); | |
| 301 int length = a->length(); | |
| 302 oop o = o_h->get_oop(); | |
| 303 for (int i = 0; i < length; i++) { | |
| 304 if (a->obj_at(i) == o) return i; | |
| 305 } | |
| 306 return -1; | |
| 307 } | |
| 308 | |
| 309 | |
| 310 // ------------------------------------------------------------------ | |
| 311 // ciEnv::check_klass_accessiblity | |
| 312 // | |
| 313 // Note: the logic of this method should mirror the logic of | |
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314 // ConstantPool::verify_constant_pool_resolve. |
| 0 | 315 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass, |
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316 Klass* resolved_klass) { |
| 0 | 317 if (accessing_klass == NULL || !accessing_klass->is_loaded()) { |
| 318 return true; | |
| 319 } | |
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320 if (accessing_klass->is_obj_array_klass()) { |
| 0 | 321 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass(); |
| 322 } | |
| 323 if (!accessing_klass->is_instance_klass()) { | |
| 324 return true; | |
| 325 } | |
| 326 | |
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327 if (resolved_klass->oop_is_objArray()) { |
| 0 | 328 // Find the element klass, if this is an array. |
| 329 resolved_klass = objArrayKlass::cast(resolved_klass)->bottom_klass(); | |
| 330 } | |
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331 if (resolved_klass->oop_is_instance()) { |
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332 return Reflection::verify_class_access(accessing_klass->get_Klass(), |
| 0 | 333 resolved_klass, |
| 334 true); | |
| 335 } | |
| 336 return true; | |
| 337 } | |
| 338 | |
| 339 // ------------------------------------------------------------------ | |
| 340 // ciEnv::get_klass_by_name_impl | |
| 341 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass, | |
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342 constantPoolHandle cpool, |
| 0 | 343 ciSymbol* name, |
| 344 bool require_local) { | |
| 345 ASSERT_IN_VM; | |
| 346 EXCEPTION_CONTEXT; | |
| 347 | |
| 348 // Now we need to check the SystemDictionary | |
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349 Symbol* sym = name->get_symbol(); |
| 0 | 350 if (sym->byte_at(0) == 'L' && |
| 351 sym->byte_at(sym->utf8_length()-1) == ';') { | |
| 352 // This is a name from a signature. Strip off the trimmings. | |
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353 // Call recursive to keep scope of strippedsym. |
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354 TempNewSymbol strippedsym = SymbolTable::new_symbol(sym->as_utf8()+1, |
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355 sym->utf8_length()-2, |
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356 KILL_COMPILE_ON_FATAL_(_unloaded_ciinstance_klass)); |
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357 ciSymbol* strippedname = get_symbol(strippedsym); |
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358 return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local); |
| 0 | 359 } |
| 360 | |
| 361 // Check for prior unloaded klass. The SystemDictionary's answers | |
| 362 // can vary over time but the compiler needs consistency. | |
| 363 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name); | |
| 364 if (unloaded_klass != NULL) { | |
| 365 if (require_local) return NULL; | |
| 366 return unloaded_klass; | |
| 367 } | |
| 368 | |
| 369 Handle loader(THREAD, (oop)NULL); | |
| 370 Handle domain(THREAD, (oop)NULL); | |
| 371 if (accessing_klass != NULL) { | |
| 372 loader = Handle(THREAD, accessing_klass->loader()); | |
| 373 domain = Handle(THREAD, accessing_klass->protection_domain()); | |
| 374 } | |
| 375 | |
| 376 // setup up the proper type to return on OOM | |
| 377 ciKlass* fail_type; | |
| 378 if (sym->byte_at(0) == '[') { | |
| 379 fail_type = _unloaded_ciobjarrayklass; | |
| 380 } else { | |
| 381 fail_type = _unloaded_ciinstance_klass; | |
| 382 } | |
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383 KlassHandle found_klass; |
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384 { |
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385 ttyUnlocker ttyul; // release tty lock to avoid ordering problems |
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386 MutexLocker ml(Compile_lock); |
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387 Klass* kls; |
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388 if (!require_local) { |
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389 kls = SystemDictionary::find_constrained_instance_or_array_klass(sym, loader, |
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390 KILL_COMPILE_ON_FATAL_(fail_type)); |
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391 } else { |
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392 kls = SystemDictionary::find_instance_or_array_klass(sym, loader, domain, |
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393 KILL_COMPILE_ON_FATAL_(fail_type)); |
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394 } |
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395 found_klass = KlassHandle(THREAD, kls); |
| 0 | 396 } |
| 397 | |
| 398 // If we fail to find an array klass, look again for its element type. | |
| 399 // The element type may be available either locally or via constraints. | |
| 400 // In either case, if we can find the element type in the system dictionary, | |
| 401 // we must build an array type around it. The CI requires array klasses | |
| 402 // to be loaded if their element klasses are loaded, except when memory | |
| 403 // is exhausted. | |
| 404 if (sym->byte_at(0) == '[' && | |
| 405 (sym->byte_at(1) == '[' || sym->byte_at(1) == 'L')) { | |
| 406 // We have an unloaded array. | |
| 407 // Build it on the fly if the element class exists. | |
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408 TempNewSymbol elem_sym = SymbolTable::new_symbol(sym->as_utf8()+1, |
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409 sym->utf8_length()-1, |
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410 KILL_COMPILE_ON_FATAL_(fail_type)); |
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411 |
| 0 | 412 // Get element ciKlass recursively. |
| 413 ciKlass* elem_klass = | |
| 414 get_klass_by_name_impl(accessing_klass, | |
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415 cpool, |
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416 get_symbol(elem_sym), |
| 0 | 417 require_local); |
| 418 if (elem_klass != NULL && elem_klass->is_loaded()) { | |
| 419 // Now make an array for it | |
| 420 return ciObjArrayKlass::make_impl(elem_klass); | |
| 421 } | |
| 422 } | |
| 423 | |
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424 if (found_klass() == NULL && !cpool.is_null() && cpool->has_preresolution()) { |
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425 // Look inside the constant pool for pre-resolved class entries. |
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426 for (int i = cpool->length() - 1; i >= 1; i--) { |
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427 if (cpool->tag_at(i).is_klass()) { |
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428 Klass* kls = cpool->resolved_klass_at(i); |
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429 if (Klass::cast(kls)->name() == sym) { |
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430 found_klass = KlassHandle(THREAD, kls); |
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431 break; |
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432 } |
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433 } |
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434 } |
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435 } |
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436 |
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437 if (found_klass() != NULL) { |
| 0 | 438 // Found it. Build a CI handle. |
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439 return get_klass(found_klass()); |
| 0 | 440 } |
| 441 | |
| 442 if (require_local) return NULL; | |
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443 |
| 0 | 444 // Not yet loaded into the VM, or not governed by loader constraints. |
| 445 // Make a CI representative for it. | |
| 446 return get_unloaded_klass(accessing_klass, name); | |
| 447 } | |
| 448 | |
| 449 // ------------------------------------------------------------------ | |
| 450 // ciEnv::get_klass_by_name | |
| 451 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass, | |
| 452 ciSymbol* klass_name, | |
| 453 bool require_local) { | |
| 454 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass, | |
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455 constantPoolHandle(), |
| 0 | 456 klass_name, |
| 457 require_local);) | |
| 458 } | |
| 459 | |
| 460 // ------------------------------------------------------------------ | |
| 461 // ciEnv::get_klass_by_index_impl | |
| 462 // | |
| 463 // Implementation of get_klass_by_index. | |
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464 ciKlass* ciEnv::get_klass_by_index_impl(constantPoolHandle cpool, |
| 0 | 465 int index, |
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466 bool& is_accessible, |
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467 ciInstanceKlass* accessor) { |
| 0 | 468 EXCEPTION_CONTEXT; |
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469 KlassHandle klass; // = NULL; |
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470 Symbol* klass_name = NULL; |
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471 |
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472 if (cpool->tag_at(index).is_symbol()) { |
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473 klass_name = cpool->symbol_at(index); |
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474 } else { |
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475 // Check if it's resolved if it's not a symbol constant pool entry. |
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476 klass = KlassHandle(THREAD, ConstantPool::klass_at_if_loaded(cpool, index)); |
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477 |
| 0 | 478 if (klass.is_null()) { |
| 479 // The klass has not been inserted into the constant pool. | |
| 480 // Try to look it up by name. | |
| 481 { | |
| 482 // We have to lock the cpool to keep the oop from being resolved | |
| 483 // while we are accessing it. | |
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484 MonitorLockerEx ml(cpool->lock()); |
| 0 | 485 constantTag tag = cpool->tag_at(index); |
| 486 if (tag.is_klass()) { | |
| 487 // The klass has been inserted into the constant pool | |
| 488 // very recently. | |
| 489 klass = KlassHandle(THREAD, cpool->resolved_klass_at(index)); | |
| 490 } else { | |
| 491 assert(cpool->tag_at(index).is_unresolved_klass(), "wrong tag"); | |
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492 klass_name = cpool->unresolved_klass_at(index); |
| 0 | 493 } |
| 494 } | |
| 495 } | |
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496 } |
| 0 | 497 |
| 498 if (klass.is_null()) { | |
| 499 // Not found in constant pool. Use the name to do the lookup. | |
| 500 ciKlass* k = get_klass_by_name_impl(accessor, | |
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501 cpool, |
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502 get_symbol(klass_name), |
| 0 | 503 false); |
| 504 // Calculate accessibility the hard way. | |
| 505 if (!k->is_loaded()) { | |
| 506 is_accessible = false; | |
| 507 } else if (k->loader() != accessor->loader() && | |
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508 get_klass_by_name_impl(accessor, cpool, k->name(), true) == NULL) { |
| 0 | 509 // Loaded only remotely. Not linked yet. |
| 510 is_accessible = false; | |
| 511 } else { | |
| 512 // Linked locally, and we must also check public/private, etc. | |
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513 is_accessible = check_klass_accessibility(accessor, k->get_Klass()); |
| 0 | 514 } |
| 515 return k; | |
| 516 } | |
| 517 | |
| 518 // Check for prior unloaded klass. The SystemDictionary's answers | |
| 519 // can vary over time but the compiler needs consistency. | |
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520 ciSymbol* name = get_symbol(klass()->name()); |
| 0 | 521 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name); |
| 522 if (unloaded_klass != NULL) { | |
| 523 is_accessible = false; | |
| 524 return unloaded_klass; | |
| 525 } | |
| 526 | |
| 527 // It is known to be accessible, since it was found in the constant pool. | |
| 528 is_accessible = true; | |
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529 return get_klass(klass()); |
| 0 | 530 } |
| 531 | |
| 532 // ------------------------------------------------------------------ | |
| 533 // ciEnv::get_klass_by_index | |
| 534 // | |
| 535 // Get a klass from the constant pool. | |
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536 ciKlass* ciEnv::get_klass_by_index(constantPoolHandle cpool, |
| 0 | 537 int index, |
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538 bool& is_accessible, |
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539 ciInstanceKlass* accessor) { |
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540 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);) |
| 0 | 541 } |
| 542 | |
| 543 // ------------------------------------------------------------------ | |
| 544 // ciEnv::get_constant_by_index_impl | |
| 545 // | |
| 546 // Implementation of get_constant_by_index(). | |
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547 ciConstant ciEnv::get_constant_by_index_impl(constantPoolHandle cpool, |
| 1602 | 548 int pool_index, int cache_index, |
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549 ciInstanceKlass* accessor) { |
| 1602 | 550 bool ignore_will_link; |
| 0 | 551 EXCEPTION_CONTEXT; |
| 1602 | 552 int index = pool_index; |
| 553 if (cache_index >= 0) { | |
| 554 assert(index < 0, "only one kind of index at a time"); | |
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555 oop obj = cpool->resolved_references()->obj_at(cache_index); |
| 1602 | 556 if (obj != NULL) { |
| 557 ciObject* ciobj = get_object(obj); | |
| 558 return ciConstant(T_OBJECT, ciobj); | |
| 559 } | |
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560 index = cpool->object_to_cp_index(cache_index); |
| 1602 | 561 } |
| 0 | 562 constantTag tag = cpool->tag_at(index); |
| 563 if (tag.is_int()) { | |
| 564 return ciConstant(T_INT, (jint)cpool->int_at(index)); | |
| 565 } else if (tag.is_long()) { | |
| 566 return ciConstant((jlong)cpool->long_at(index)); | |
| 567 } else if (tag.is_float()) { | |
| 568 return ciConstant((jfloat)cpool->float_at(index)); | |
| 569 } else if (tag.is_double()) { | |
| 570 return ciConstant((jdouble)cpool->double_at(index)); | |
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571 } else if (tag.is_string()) { |
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572 oop string = NULL; |
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573 assert(cache_index >= 0, "should have a cache index"); |
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574 if (cpool->is_pseudo_string_at(index)) { |
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575 string = cpool->pseudo_string_at(index, cache_index); |
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576 } else { |
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577 string = cpool->string_at(index, cache_index, THREAD); |
|
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578 if (HAS_PENDING_EXCEPTION) { |
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579 CLEAR_PENDING_EXCEPTION; |
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580 record_out_of_memory_failure(); |
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581 return ciConstant(); |
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582 } |
| 0 | 583 } |
| 584 ciObject* constant = get_object(string); | |
| 585 assert (constant->is_instance(), "must be an instance, or not? "); | |
| 586 return ciConstant(T_OBJECT, constant); | |
| 587 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
| 588 // 4881222: allow ldc to take a class type | |
| 1602 | 589 ciKlass* klass = get_klass_by_index_impl(cpool, index, ignore_will_link, accessor); |
| 0 | 590 if (HAS_PENDING_EXCEPTION) { |
| 591 CLEAR_PENDING_EXCEPTION; | |
| 592 record_out_of_memory_failure(); | |
| 593 return ciConstant(); | |
| 594 } | |
| 595 assert (klass->is_instance_klass() || klass->is_array_klass(), | |
| 596 "must be an instance or array klass "); | |
| 1602 | 597 return ciConstant(T_OBJECT, klass->java_mirror()); |
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598 } else if (tag.is_object()) { |
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599 oop obj = cpool->object_at(index); |
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600 ciObject* ciobj = get_object(obj); |
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601 return ciConstant(T_OBJECT, ciobj); |
| 1602 | 602 } else if (tag.is_method_type()) { |
| 603 // must execute Java code to link this CP entry into cache[i].f1 | |
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604 ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index)); |
| 1602 | 605 ciObject* ciobj = get_unloaded_method_type_constant(signature); |
| 606 return ciConstant(T_OBJECT, ciobj); | |
| 607 } else if (tag.is_method_handle()) { | |
| 608 // must execute Java code to link this CP entry into cache[i].f1 | |
| 609 int ref_kind = cpool->method_handle_ref_kind_at(index); | |
| 610 int callee_index = cpool->method_handle_klass_index_at(index); | |
| 611 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor); | |
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612 ciSymbol* name = get_symbol(cpool->method_handle_name_ref_at(index)); |
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613 ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index)); |
| 1602 | 614 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind); |
| 615 return ciConstant(T_OBJECT, ciobj); | |
| 0 | 616 } else { |
| 617 ShouldNotReachHere(); | |
| 618 return ciConstant(); | |
| 619 } | |
| 620 } | |
| 621 | |
| 622 // ------------------------------------------------------------------ | |
| 623 // ciEnv::get_constant_by_index | |
| 624 // | |
| 625 // Pull a constant out of the constant pool. How appropriate. | |
| 626 // | |
| 627 // Implementation note: this query is currently in no way cached. | |
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628 ciConstant ciEnv::get_constant_by_index(constantPoolHandle cpool, |
| 1602 | 629 int pool_index, int cache_index, |
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630 ciInstanceKlass* accessor) { |
| 1602 | 631 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);) |
| 0 | 632 } |
| 633 | |
| 634 // ------------------------------------------------------------------ | |
| 635 // ciEnv::get_field_by_index_impl | |
| 636 // | |
| 637 // Implementation of get_field_by_index. | |
| 638 // | |
| 639 // Implementation note: the results of field lookups are cached | |
| 640 // in the accessor klass. | |
| 641 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor, | |
| 642 int index) { | |
| 643 ciConstantPoolCache* cache = accessor->field_cache(); | |
| 644 if (cache == NULL) { | |
| 645 ciField* field = new (arena()) ciField(accessor, index); | |
| 646 return field; | |
| 647 } else { | |
| 648 ciField* field = (ciField*)cache->get(index); | |
| 649 if (field == NULL) { | |
| 650 field = new (arena()) ciField(accessor, index); | |
| 651 cache->insert(index, field); | |
| 652 } | |
| 653 return field; | |
| 654 } | |
| 655 } | |
| 656 | |
| 657 // ------------------------------------------------------------------ | |
| 658 // ciEnv::get_field_by_index | |
| 659 // | |
| 660 // Get a field by index from a klass's constant pool. | |
| 661 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor, | |
| 662 int index) { | |
| 663 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);) | |
| 664 } | |
| 665 | |
| 666 // ------------------------------------------------------------------ | |
| 667 // ciEnv::lookup_method | |
| 668 // | |
| 669 // Perform an appropriate method lookup based on accessor, holder, | |
| 670 // name, signature, and bytecode. | |
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671 Method* ciEnv::lookup_method(InstanceKlass* accessor, |
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672 InstanceKlass* holder, |
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673 Symbol* name, |
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674 Symbol* sig, |
| 0 | 675 Bytecodes::Code bc) { |
| 676 EXCEPTION_CONTEXT; | |
| 677 KlassHandle h_accessor(THREAD, accessor); | |
| 678 KlassHandle h_holder(THREAD, holder); | |
| 679 LinkResolver::check_klass_accessability(h_accessor, h_holder, KILL_COMPILE_ON_FATAL_(NULL)); | |
| 680 methodHandle dest_method; | |
| 681 switch (bc) { | |
| 682 case Bytecodes::_invokestatic: | |
| 683 dest_method = | |
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684 LinkResolver::resolve_static_call_or_null(h_holder, name, sig, h_accessor); |
| 0 | 685 break; |
| 686 case Bytecodes::_invokespecial: | |
| 687 dest_method = | |
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688 LinkResolver::resolve_special_call_or_null(h_holder, name, sig, h_accessor); |
| 0 | 689 break; |
| 690 case Bytecodes::_invokeinterface: | |
| 691 dest_method = | |
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692 LinkResolver::linktime_resolve_interface_method_or_null(h_holder, name, sig, |
| 0 | 693 h_accessor, true); |
| 694 break; | |
| 695 case Bytecodes::_invokevirtual: | |
| 696 dest_method = | |
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697 LinkResolver::linktime_resolve_virtual_method_or_null(h_holder, name, sig, |
| 0 | 698 h_accessor, true); |
| 699 break; | |
| 700 default: ShouldNotReachHere(); | |
| 701 } | |
| 702 | |
| 703 return dest_method(); | |
| 704 } | |
| 705 | |
| 706 | |
| 707 // ------------------------------------------------------------------ | |
| 708 // ciEnv::get_method_by_index_impl | |
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709 ciMethod* ciEnv::get_method_by_index_impl(constantPoolHandle cpool, |
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710 int index, Bytecodes::Code bc, |
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711 ciInstanceKlass* accessor) { |
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712 if (bc == Bytecodes::_invokedynamic) { |
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713 ConstantPoolCacheEntry* cpce = cpool->invokedynamic_cp_cache_entry_at(index); |
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714 bool is_resolved = !cpce->is_f1_null(); |
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715 // FIXME: code generation could allow for null (unlinked) call site |
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716 // The call site could be made patchable as follows: |
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717 // Load the appendix argument from the constant pool. |
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718 // Test the appendix argument and jump to a known deopt routine if it is null. |
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719 // Jump through a patchable call site, which is initially a deopt routine. |
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720 // Patch the call site to the nmethod entry point of the static compiled lambda form. |
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721 // As with other two-component call sites, both values must be independently verified. |
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722 |
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723 if (is_resolved) { |
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724 // Get the invoker Method* from the constant pool. |
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725 // (The appendix argument, if any, will be noted in the method's signature.) |
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726 Method* adapter = cpce->f1_as_method(); |
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727 return get_method(adapter); |
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728 } |
| 0 | 729 |
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730 // Fake a method that is equivalent to a declared method. |
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731 ciInstanceKlass* holder = get_instance_klass(SystemDictionary::MethodHandle_klass()); |
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732 ciSymbol* name = ciSymbol::invokeBasic_name(); |
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733 ciSymbol* signature = get_symbol(cpool->signature_ref_at(index)); |
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734 return get_unloaded_method(holder, name, signature, accessor); |
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735 } else { |
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736 const int holder_index = cpool->klass_ref_index_at(index); |
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737 bool holder_is_accessible; |
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738 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor); |
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739 ciInstanceKlass* declared_holder = get_instance_klass_for_declared_method_holder(holder); |
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740 |
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741 // Get the method's name and signature. |
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742 Symbol* name_sym = cpool->name_ref_at(index); |
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743 Symbol* sig_sym = cpool->signature_ref_at(index); |
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744 |
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745 if (cpool->has_preresolution() |
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746 || (holder == ciEnv::MethodHandle_klass() && |
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747 MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) { |
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748 // Short-circuit lookups for JSR 292-related call sites. |
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749 // That is, do not rely only on name-based lookups, because they may fail |
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750 // if the names are not resolvable in the boot class loader (7056328). |
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751 switch (bc) { |
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752 case Bytecodes::_invokevirtual: |
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753 case Bytecodes::_invokeinterface: |
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754 case Bytecodes::_invokespecial: |
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755 case Bytecodes::_invokestatic: |
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756 { |
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757 Method* m = ConstantPool::method_at_if_loaded(cpool, index); |
|
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758 if (m != NULL) { |
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759 return get_method(m); |
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760 } |
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761 } |
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762 break; |
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763 } |
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764 } |
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765 |
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766 if (holder_is_accessible) { // Our declared holder is loaded. |
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767 InstanceKlass* lookup = declared_holder->get_instanceKlass(); |
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768 Method* m = lookup_method(accessor->get_instanceKlass(), lookup, name_sym, sig_sym, bc); |
|
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769 if (m != NULL && |
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770 (bc == Bytecodes::_invokestatic |
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771 ? InstanceKlass::cast(m->method_holder())->is_not_initialized() |
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772 : !InstanceKlass::cast(m->method_holder())->is_loaded())) { |
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773 m = NULL; |
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774 } |
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775 if (m != NULL) { |
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776 // We found the method. |
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777 return get_method(m); |
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778 } |
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779 } |
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780 |
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781 // Either the declared holder was not loaded, or the method could |
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782 // not be found. Create a dummy ciMethod to represent the failed |
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783 // lookup. |
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784 ciSymbol* name = get_symbol(name_sym); |
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785 ciSymbol* signature = get_symbol(sig_sym); |
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786 return get_unloaded_method(declared_holder, name, signature, accessor); |
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787 } |
|
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788 } |
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789 |
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790 |
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791 // ------------------------------------------------------------------ |
| 0 | 792 // ciEnv::get_instance_klass_for_declared_method_holder |
| 793 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) { | |
| 794 // For the case of <array>.clone(), the method holder can be a ciArrayKlass | |
| 795 // instead of a ciInstanceKlass. For that case simply pretend that the | |
| 796 // declared holder is Object.clone since that's where the call will bottom out. | |
| 797 // A more correct fix would trickle out through many interfaces in CI, | |
| 798 // requiring ciInstanceKlass* to become ciKlass* and many more places would | |
| 799 // require checks to make sure the expected type was found. Given that this | |
| 800 // only occurs for clone() the more extensive fix seems like overkill so | |
| 801 // instead we simply smear the array type into Object. | |
| 802 if (method_holder->is_instance_klass()) { | |
| 803 return method_holder->as_instance_klass(); | |
| 804 } else if (method_holder->is_array_klass()) { | |
| 805 return current()->Object_klass(); | |
| 806 } else { | |
| 807 ShouldNotReachHere(); | |
| 808 } | |
| 809 return NULL; | |
| 810 } | |
| 811 | |
| 812 | |
| 813 // ------------------------------------------------------------------ | |
| 814 // ciEnv::get_method_by_index | |
|
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815 ciMethod* ciEnv::get_method_by_index(constantPoolHandle cpool, |
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816 int index, Bytecodes::Code bc, |
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817 ciInstanceKlass* accessor) { |
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818 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);) |
| 0 | 819 } |
| 820 | |
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821 |
| 0 | 822 // ------------------------------------------------------------------ |
| 823 // ciEnv::name_buffer | |
| 824 char *ciEnv::name_buffer(int req_len) { | |
| 825 if (_name_buffer_len < req_len) { | |
| 826 if (_name_buffer == NULL) { | |
| 827 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len); | |
| 828 _name_buffer_len = req_len; | |
| 829 } else { | |
| 830 _name_buffer = | |
| 831 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len); | |
| 832 _name_buffer_len = req_len; | |
| 833 } | |
| 834 } | |
| 835 return _name_buffer; | |
| 836 } | |
| 837 | |
| 838 // ------------------------------------------------------------------ | |
| 839 // ciEnv::is_in_vm | |
| 840 bool ciEnv::is_in_vm() { | |
| 841 return JavaThread::current()->thread_state() == _thread_in_vm; | |
| 842 } | |
| 843 | |
| 844 bool ciEnv::system_dictionary_modification_counter_changed() { | |
| 845 return _system_dictionary_modification_counter != SystemDictionary::number_of_modifications(); | |
| 846 } | |
| 847 | |
| 848 // ------------------------------------------------------------------ | |
|
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849 // ciEnv::validate_compile_task_dependencies |
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850 // |
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851 // Check for changes during compilation (e.g. class loads, evolution, |
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852 // breakpoints, call site invalidation). |
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853 void ciEnv::validate_compile_task_dependencies(ciMethod* target) { |
| 0 | 854 if (failing()) return; // no need for further checks |
| 855 | |
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856 // First, check non-klass dependencies as we might return early and |
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857 // not check klass dependencies if the system dictionary |
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858 // modification counter hasn't changed (see below). |
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859 for (Dependencies::DepStream deps(dependencies()); deps.next(); ) { |
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860 if (deps.is_klass_type()) continue; // skip klass dependencies |
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861 Klass* witness = deps.check_dependency(); |
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862 if (witness != NULL) { |
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863 record_failure("invalid non-klass dependency"); |
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864 return; |
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865 } |
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866 } |
| 0 | 867 |
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868 // Klass dependencies must be checked when the system dictionary |
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869 // changes. If logging is enabled all violated dependences will be |
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870 // recorded in the log. In debug mode check dependencies even if |
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871 // the system dictionary hasn't changed to verify that no invalid |
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872 // dependencies were inserted. Any violated dependences in this |
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873 // case are dumped to the tty. |
| 0 | 874 bool counter_changed = system_dictionary_modification_counter_changed(); |
| 875 | |
| 3959 | 876 bool verify_deps = trueInDebug; |
| 877 if (!counter_changed && !verify_deps) return; | |
| 878 | |
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879 int klass_violations = 0; |
| 0 | 880 for (Dependencies::DepStream deps(dependencies()); deps.next(); ) { |
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881 if (!deps.is_klass_type()) continue; // skip non-klass dependencies |
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882 Klass* witness = deps.check_dependency(); |
| 0 | 883 if (witness != NULL) { |
|
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884 klass_violations++; |
| 3959 | 885 if (!counter_changed) { |
| 886 // Dependence failed but counter didn't change. Log a message | |
| 887 // describing what failed and allow the assert at the end to | |
| 888 // trigger. | |
| 889 deps.print_dependency(witness); | |
| 890 } else if (xtty == NULL) { | |
| 891 // If we're not logging then a single violation is sufficient, | |
| 892 // otherwise we want to log all the dependences which were | |
| 893 // violated. | |
| 894 break; | |
| 895 } | |
| 0 | 896 } |
| 897 } | |
| 898 | |
|
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899 if (klass_violations != 0) { |
| 3959 | 900 #ifdef ASSERT |
| 901 if (!counter_changed && !PrintCompilation) { | |
| 902 // Print out the compile task that failed | |
| 903 _task->print_line(); | |
| 904 } | |
| 905 #endif | |
| 0 | 906 assert(counter_changed, "failed dependencies, but counter didn't change"); |
| 907 record_failure("concurrent class loading"); | |
| 908 } | |
| 909 } | |
| 910 | |
| 911 // ------------------------------------------------------------------ | |
| 912 // ciEnv::register_method | |
| 913 void ciEnv::register_method(ciMethod* target, | |
| 914 int entry_bci, | |
| 915 CodeOffsets* offsets, | |
| 916 int orig_pc_offset, | |
| 917 CodeBuffer* code_buffer, | |
| 918 int frame_words, | |
| 919 OopMapSet* oop_map_set, | |
| 920 ExceptionHandlerTable* handler_table, | |
| 921 ImplicitExceptionTable* inc_table, | |
| 922 AbstractCompiler* compiler, | |
| 923 int comp_level, | |
| 924 bool has_unsafe_access) { | |
| 925 VM_ENTRY_MARK; | |
| 926 nmethod* nm = NULL; | |
| 927 { | |
| 928 // To prevent compile queue updates. | |
| 929 MutexLocker locker(MethodCompileQueue_lock, THREAD); | |
| 930 | |
| 931 // Prevent SystemDictionary::add_to_hierarchy from running | |
| 932 // and invalidating our dependencies until we install this method. | |
| 933 MutexLocker ml(Compile_lock); | |
| 934 | |
|
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935 // Change in Jvmti state may invalidate compilation. |
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936 if (!failing() && |
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937 ( (!jvmti_can_hotswap_or_post_breakpoint() && |
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938 JvmtiExport::can_hotswap_or_post_breakpoint()) || |
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939 (!jvmti_can_access_local_variables() && |
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940 JvmtiExport::can_access_local_variables()) || |
|
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941 (!jvmti_can_post_on_exceptions() && |
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942 JvmtiExport::can_post_on_exceptions()) )) { |
|
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943 record_failure("Jvmti state change invalidated dependencies"); |
| 0 | 944 } |
| 945 | |
|
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946 // Change in DTrace flags may invalidate compilation. |
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947 if (!failing() && |
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948 ( (!dtrace_extended_probes() && ExtendedDTraceProbes) || |
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949 (!dtrace_method_probes() && DTraceMethodProbes) || |
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950 (!dtrace_alloc_probes() && DTraceAllocProbes) )) { |
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951 record_failure("DTrace flags change invalidated dependencies"); |
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952 } |
| 0 | 953 |
|
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954 if (!failing()) { |
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955 if (log() != NULL) { |
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956 // Log the dependencies which this compilation declares. |
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957 dependencies()->log_all_dependencies(); |
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958 } |
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959 |
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960 // Encode the dependencies now, so we can check them right away. |
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961 dependencies()->encode_content_bytes(); |
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962 |
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963 // Check for {class loads, evolution, breakpoints, ...} during compilation |
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964 validate_compile_task_dependencies(target); |
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965 } |
| 0 | 966 |
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967 methodHandle method(THREAD, target->get_Method()); |
| 0 | 968 |
| 969 if (failing()) { | |
| 970 // While not a true deoptimization, it is a preemptive decompile. | |
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971 MethodData* mdo = method()->method_data(); |
| 0 | 972 if (mdo != NULL) { |
| 973 mdo->inc_decompile_count(); | |
| 974 } | |
| 975 | |
| 976 // All buffers in the CodeBuffer are allocated in the CodeCache. | |
| 977 // If the code buffer is created on each compile attempt | |
| 978 // as in C2, then it must be freed. | |
| 979 code_buffer->free_blob(); | |
| 980 return; | |
| 981 } | |
| 982 | |
| 983 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry"); | |
| 984 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry"); | |
| 985 | |
| 986 nm = nmethod::new_nmethod(method, | |
| 987 compile_id(), | |
| 988 entry_bci, | |
| 989 offsets, | |
| 990 orig_pc_offset, | |
| 991 debug_info(), dependencies(), code_buffer, | |
| 992 frame_words, oop_map_set, | |
| 993 handler_table, inc_table, | |
| 994 compiler, comp_level); | |
| 995 | |
| 996 // Free codeBlobs | |
| 997 code_buffer->free_blob(); | |
| 998 | |
| 999 // stress test 6243940 by immediately making the method | |
| 1000 // non-entrant behind the system's back. This has serious | |
| 1001 // side effects on the code cache and is not meant for | |
| 1002 // general stress testing | |
| 1003 if (nm != NULL && StressNonEntrant) { | |
| 1004 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
| 1005 NativeJump::patch_verified_entry(nm->entry_point(), nm->verified_entry_point(), | |
| 1006 SharedRuntime::get_handle_wrong_method_stub()); | |
| 1007 } | |
| 1008 | |
| 1009 if (nm == NULL) { | |
| 1010 // The CodeCache is full. Print out warning and disable compilation. | |
| 1011 record_failure("code cache is full"); | |
| 1202 | 1012 { |
| 1013 MutexUnlocker ml(Compile_lock); | |
| 1014 MutexUnlocker locker(MethodCompileQueue_lock); | |
| 1015 CompileBroker::handle_full_code_cache(); | |
| 0 | 1016 } |
| 1017 } else { | |
| 1018 nm->set_has_unsafe_access(has_unsafe_access); | |
| 1019 | |
| 1020 // Record successful registration. | |
| 1021 // (Put nm into the task handle *before* publishing to the Java heap.) | |
| 1022 if (task() != NULL) task()->set_code(nm); | |
| 1023 | |
| 1024 if (entry_bci == InvocationEntryBci) { | |
| 1783 | 1025 if (TieredCompilation) { |
| 1026 // If there is an old version we're done with it | |
| 1027 nmethod* old = method->code(); | |
| 1028 if (TraceMethodReplacement && old != NULL) { | |
| 1029 ResourceMark rm; | |
| 1030 char *method_name = method->name_and_sig_as_C_string(); | |
| 1031 tty->print_cr("Replacing method %s", method_name); | |
| 1032 } | |
| 1033 if (old != NULL ) { | |
| 1034 old->make_not_entrant(); | |
| 1035 } | |
| 0 | 1036 } |
| 1037 if (TraceNMethodInstalls ) { | |
| 1038 ResourceMark rm; | |
| 1039 char *method_name = method->name_and_sig_as_C_string(); | |
| 1040 ttyLocker ttyl; | |
| 1041 tty->print_cr("Installing method (%d) %s ", | |
| 1042 comp_level, | |
| 1043 method_name); | |
| 1044 } | |
| 1045 // Allow the code to be executed | |
| 1046 method->set_code(method, nm); | |
| 1047 } else { | |
| 1048 if (TraceNMethodInstalls ) { | |
| 1049 ResourceMark rm; | |
| 1050 char *method_name = method->name_and_sig_as_C_string(); | |
| 1051 ttyLocker ttyl; | |
| 1052 tty->print_cr("Installing osr method (%d) %s @ %d", | |
| 1053 comp_level, | |
| 1054 method_name, | |
| 1055 entry_bci); | |
| 1056 } | |
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1057 InstanceKlass::cast(method->method_holder())->add_osr_nmethod(nm); |
| 0 | 1058 |
| 1059 } | |
| 1060 } | |
| 1061 } | |
| 1062 // JVMTI -- compiled method notification (must be done outside lock) | |
| 1063 if (nm != NULL) { | |
| 1064 nm->post_compiled_method_load_event(); | |
| 1065 } | |
| 1066 | |
| 1067 } | |
| 1068 | |
| 1069 | |
| 1070 // ------------------------------------------------------------------ | |
| 1071 // ciEnv::find_system_klass | |
| 1072 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) { | |
| 1073 VM_ENTRY_MARK; | |
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1074 return get_klass_by_name_impl(NULL, constantPoolHandle(), klass_name, false); |
| 0 | 1075 } |
| 1076 | |
| 1077 // ------------------------------------------------------------------ | |
| 1078 // ciEnv::comp_level | |
| 1079 int ciEnv::comp_level() { | |
| 1783 | 1080 if (task() == NULL) return CompLevel_highest_tier; |
| 0 | 1081 return task()->comp_level(); |
| 1082 } | |
| 1083 | |
| 1084 // ------------------------------------------------------------------ | |
| 1085 // ciEnv::compile_id | |
| 1086 uint ciEnv::compile_id() { | |
| 1087 if (task() == NULL) return 0; | |
| 1088 return task()->compile_id(); | |
| 1089 } | |
| 1090 | |
| 1091 // ------------------------------------------------------------------ | |
| 1092 // ciEnv::notice_inlined_method() | |
| 1093 void ciEnv::notice_inlined_method(ciMethod* method) { | |
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1094 _num_inlined_bytecodes += method->code_size_for_inlining(); |
| 0 | 1095 } |
| 1096 | |
| 1097 // ------------------------------------------------------------------ | |
| 1098 // ciEnv::num_inlined_bytecodes() | |
| 1099 int ciEnv::num_inlined_bytecodes() const { | |
| 1100 return _num_inlined_bytecodes; | |
| 1101 } | |
| 1102 | |
| 1103 // ------------------------------------------------------------------ | |
| 1104 // ciEnv::record_failure() | |
| 1105 void ciEnv::record_failure(const char* reason) { | |
| 1106 if (log() != NULL) { | |
| 1107 log()->elem("failure reason='%s'", reason); | |
| 1108 } | |
| 1109 if (_failure_reason == NULL) { | |
| 1110 // Record the first failure reason. | |
| 1111 _failure_reason = reason; | |
| 1112 } | |
| 1113 } | |
| 1114 | |
| 1115 // ------------------------------------------------------------------ | |
| 1116 // ciEnv::record_method_not_compilable() | |
| 1117 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) { | |
| 1118 int new_compilable = | |
| 1119 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ; | |
| 1120 | |
| 1121 // Only note transitions to a worse state | |
| 1122 if (new_compilable > _compilable) { | |
| 1123 if (log() != NULL) { | |
| 1124 if (all_tiers) { | |
| 1125 log()->elem("method_not_compilable"); | |
| 1126 } else { | |
| 1127 log()->elem("method_not_compilable_at_tier"); | |
| 1128 } | |
| 1129 } | |
| 1130 _compilable = new_compilable; | |
| 1131 | |
| 1132 // Reset failure reason; this one is more important. | |
| 1133 _failure_reason = NULL; | |
| 1134 record_failure(reason); | |
| 1135 } | |
| 1136 } | |
| 1137 | |
| 1138 // ------------------------------------------------------------------ | |
| 1139 // ciEnv::record_out_of_memory_failure() | |
| 1140 void ciEnv::record_out_of_memory_failure() { | |
| 1141 // If memory is low, we stop compiling methods. | |
| 1142 record_method_not_compilable("out of memory"); | |
| 1143 } |