1 /* 2 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved. 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 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "code/relocInfo.hpp" 27 #include "compiler/compilerDefinitions.hpp" 28 #include "oops/metadata.hpp" 29 #include "runtime/os.hpp" 30 #include "interpreter/invocationCounter.hpp" 31 #include "runtime/arguments.hpp" 32 #include "runtime/flags/jvmFlag.hpp" 33 #include "runtime/flags/jvmFlagConstraintsCompiler.hpp" 34 #include "runtime/globals.hpp" 35 #include "runtime/globals_extension.hpp" 36 #include "utilities/powerOfTwo.hpp" 37 38 JVMFlag::Error AliasLevelConstraintFunc(intx value, bool verbose) { 39 if ((value <= 1) && (Arguments::mode() == Arguments::_comp || Arguments::mode() == Arguments::_mixed)) { 40 JVMFlag::printError(verbose, 41 "AliasLevel (" INTX_FORMAT ") is not " 42 "compatible with -Xcomp or -Xmixed\n", 43 value); 44 return JVMFlag::VIOLATES_CONSTRAINT; 45 } else { 46 return JVMFlag::SUCCESS; 47 } 48 } 49 50 /** 51 * Validate the minimum number of compiler threads needed to run the 52 * JVM. The following configurations are possible. 53 * 54 * 1) The JVM is build using an interpreter only. As a result, the minimum number of 55 * compiler threads is 0. 56 * 2) The JVM is build using the compiler(s) and tiered compilation is disabled. As 57 * a result, either C1 or C2 is used, so the minimum number of compiler threads is 1. 58 * 3) The JVM is build using the compiler(s) and tiered compilation is enabled. However, 59 * the option "TieredStopAtLevel < CompLevel_full_optimization". As a result, only 60 * C1 can be used, so the minimum number of compiler threads is 1. 61 * 4) The JVM is build using the compilers and tiered compilation is enabled. The option 62 * 'TieredStopAtLevel = CompLevel_full_optimization' (the default value). As a result, 63 * the minimum number of compiler threads is 2. 64 * 5) Non-tiered emulation mode is on. CompilationModeFlag::disable_intermediate() == true. 65 * The minimum number of threads is 2. But if CompilationModeFlag::quick_internal() == false, then it's 1. 66 */ 67 JVMFlag::Error CICompilerCountConstraintFunc(intx value, bool verbose) { 68 int min_number_of_compiler_threads = 0; 69 #if !defined(COMPILER1) && !defined(COMPILER2) && !INCLUDE_JVMCI 70 // case 1 71 #elif defined(TIERED) 72 if (TieredCompilation) { 73 if (TieredStopAtLevel < CompLevel_full_optimization || CompilationModeFlag::quick_only()) { 74 min_number_of_compiler_threads = 1; // case 3 75 } else if (CompilationModeFlag::disable_intermediate()) { 76 // case 5 77 if (CompilationModeFlag::quick_internal()) { 78 min_number_of_compiler_threads = 2; 79 } else { 80 min_number_of_compiler_threads = 1; 81 } 82 } else { 83 min_number_of_compiler_threads = 2; // case 4 (tiered) 84 } 85 } else { 86 min_number_of_compiler_threads = 1; // case 2 87 } 88 #else 89 min_number_of_compiler_threads = 1; // case 2 90 #endif 91 92 // The default CICompilerCount's value is CI_COMPILER_COUNT. 93 // With a client VM, -XX:+TieredCompilation causes TieredCompilation 94 // to be true here (the option is validated later) and 95 // min_number_of_compiler_threads to exceed CI_COMPILER_COUNT. 96 min_number_of_compiler_threads = MIN2(min_number_of_compiler_threads, CI_COMPILER_COUNT); 97 98 if (value < (intx)min_number_of_compiler_threads) { 99 JVMFlag::printError(verbose, 100 "CICompilerCount (" INTX_FORMAT ") must be " 101 "at least %d \n", 102 value, min_number_of_compiler_threads); 103 return JVMFlag::VIOLATES_CONSTRAINT; 104 } else { 105 return JVMFlag::SUCCESS; 106 } 107 } 108 109 JVMFlag::Error AllocatePrefetchDistanceConstraintFunc(intx value, bool verbose) { 110 if (value < 0 || value > 512) { 111 JVMFlag::printError(verbose, 112 "AllocatePrefetchDistance (" INTX_FORMAT ") must be " 113 "between 0 and %d\n", 114 AllocatePrefetchDistance, 512); 115 return JVMFlag::VIOLATES_CONSTRAINT; 116 } 117 118 return JVMFlag::SUCCESS; 119 } 120 121 JVMFlag::Error AllocatePrefetchStepSizeConstraintFunc(intx value, bool verbose) { 122 if (AllocatePrefetchStyle == 3) { 123 if (value % wordSize != 0) { 124 JVMFlag::printError(verbose, 125 "AllocatePrefetchStepSize (" INTX_FORMAT ") must be multiple of %d\n", 126 value, wordSize); 127 return JVMFlag::VIOLATES_CONSTRAINT; 128 } 129 } 130 return JVMFlag::SUCCESS; 131 } 132 133 JVMFlag::Error AllocatePrefetchInstrConstraintFunc(intx value, bool verbose) { 134 intx max_value = max_intx; 135 #if defined(X86) 136 max_value = 3; 137 #endif 138 if (value < 0 || value > max_value) { 139 JVMFlag::printError(verbose, 140 "AllocatePrefetchInstr (" INTX_FORMAT ") must be " 141 "between 0 and " INTX_FORMAT "\n", value, max_value); 142 return JVMFlag::VIOLATES_CONSTRAINT; 143 } 144 145 return JVMFlag::SUCCESS; 146 } 147 148 JVMFlag::Error CompileThresholdConstraintFunc(intx value, bool verbose) { 149 if (value < 0 || value > INT_MAX >> InvocationCounter::count_shift) { 150 JVMFlag::printError(verbose, 151 "CompileThreshold (" INTX_FORMAT ") " 152 "must be between 0 and %d\n", 153 value, 154 INT_MAX >> InvocationCounter::count_shift); 155 return JVMFlag::VIOLATES_CONSTRAINT; 156 } 157 158 return JVMFlag::SUCCESS; 159 } 160 161 JVMFlag::Error OnStackReplacePercentageConstraintFunc(intx value, bool verbose) { 162 int64_t max_percentage_limit = INT_MAX; 163 if (!ProfileInterpreter) { 164 max_percentage_limit = (max_percentage_limit>>InvocationCounter::count_shift); 165 } 166 max_percentage_limit = CompileThreshold == 0 ? max_percentage_limit*100 : max_percentage_limit*100/CompileThreshold; 167 168 if (ProfileInterpreter) { 169 if (value < InterpreterProfilePercentage) { 170 JVMFlag::printError(verbose, 171 "OnStackReplacePercentage (" INTX_FORMAT ") must be " 172 "larger than InterpreterProfilePercentage (" INTX_FORMAT ")\n", 173 value, InterpreterProfilePercentage); 174 return JVMFlag::VIOLATES_CONSTRAINT; 175 } 176 177 max_percentage_limit += InterpreterProfilePercentage; 178 if (value > max_percentage_limit) { 179 JVMFlag::printError(verbose, 180 "OnStackReplacePercentage (" INTX_FORMAT ") must be between 0 and " INT64_FORMAT "\n", 181 value, 182 max_percentage_limit); 183 return JVMFlag::VIOLATES_CONSTRAINT; 184 } 185 } else { 186 if (value < 0) { 187 JVMFlag::printError(verbose, 188 "OnStackReplacePercentage (" INTX_FORMAT ") must be " 189 "non-negative\n", value); 190 return JVMFlag::VIOLATES_CONSTRAINT; 191 } 192 193 if (value > max_percentage_limit) { 194 JVMFlag::printError(verbose, 195 "OnStackReplacePercentage (" INTX_FORMAT ") must be between 0 and " INT64_FORMAT "\n", 196 value, 197 max_percentage_limit); 198 return JVMFlag::VIOLATES_CONSTRAINT; 199 } 200 } 201 return JVMFlag::SUCCESS; 202 } 203 204 JVMFlag::Error CodeCacheSegmentSizeConstraintFunc(uintx value, bool verbose) { 205 if (CodeCacheSegmentSize < (uintx)CodeEntryAlignment) { 206 JVMFlag::printError(verbose, 207 "CodeCacheSegmentSize (" UINTX_FORMAT ") must be " 208 "larger than or equal to CodeEntryAlignment (" INTX_FORMAT ") " 209 "to align entry points\n", 210 CodeCacheSegmentSize, CodeEntryAlignment); 211 return JVMFlag::VIOLATES_CONSTRAINT; 212 } 213 214 if (CodeCacheSegmentSize < sizeof(jdouble)) { 215 JVMFlag::printError(verbose, 216 "CodeCacheSegmentSize (" UINTX_FORMAT ") must be " 217 "at least " SIZE_FORMAT " to align constants\n", 218 CodeCacheSegmentSize, sizeof(jdouble)); 219 return JVMFlag::VIOLATES_CONSTRAINT; 220 } 221 222 #ifdef COMPILER2 223 if (CodeCacheSegmentSize < (uintx)OptoLoopAlignment) { 224 JVMFlag::printError(verbose, 225 "CodeCacheSegmentSize (" UINTX_FORMAT ") must be " 226 "larger than or equal to OptoLoopAlignment (" INTX_FORMAT ") " 227 "to align inner loops\n", 228 CodeCacheSegmentSize, OptoLoopAlignment); 229 return JVMFlag::VIOLATES_CONSTRAINT; 230 } 231 #endif 232 233 return JVMFlag::SUCCESS; 234 } 235 236 JVMFlag::Error CompilerThreadPriorityConstraintFunc(intx value, bool verbose) { 237 return JVMFlag::SUCCESS; 238 } 239 240 JVMFlag::Error CodeEntryAlignmentConstraintFunc(intx value, bool verbose) { 241 if (!is_power_of_2(value)) { 242 JVMFlag::printError(verbose, 243 "CodeEntryAlignment (" INTX_FORMAT ") must be " 244 "a power of two\n", CodeEntryAlignment); 245 return JVMFlag::VIOLATES_CONSTRAINT; 246 } 247 248 if (CodeEntryAlignment < 16) { 249 JVMFlag::printError(verbose, 250 "CodeEntryAlignment (" INTX_FORMAT ") must be " 251 "greater than or equal to %d\n", 252 CodeEntryAlignment, 16); 253 return JVMFlag::VIOLATES_CONSTRAINT; 254 } 255 256 return JVMFlag::SUCCESS; 257 } 258 259 JVMFlag::Error OptoLoopAlignmentConstraintFunc(intx value, bool verbose) { 260 if (!is_power_of_2(value)) { 261 JVMFlag::printError(verbose, 262 "OptoLoopAlignment (" INTX_FORMAT ") " 263 "must be a power of two\n", 264 value); 265 return JVMFlag::VIOLATES_CONSTRAINT; 266 } 267 268 // Relevant on ppc, s390. Will be optimized where 269 // addr_unit() == 1. 270 if (OptoLoopAlignment % relocInfo::addr_unit() != 0) { 271 JVMFlag::printError(verbose, 272 "OptoLoopAlignment (" INTX_FORMAT ") must be " 273 "multiple of NOP size (%d)\n", 274 value, relocInfo::addr_unit()); 275 return JVMFlag::VIOLATES_CONSTRAINT; 276 } 277 278 return JVMFlag::SUCCESS; 279 } 280 281 JVMFlag::Error ArraycopyDstPrefetchDistanceConstraintFunc(uintx value, bool verbose) { 282 if (value >= 4032) { 283 JVMFlag::printError(verbose, 284 "ArraycopyDstPrefetchDistance (" UINTX_FORMAT ") must be" 285 "between 0 and 4031\n", value); 286 return JVMFlag::VIOLATES_CONSTRAINT; 287 } 288 289 return JVMFlag::SUCCESS; 290 } 291 292 JVMFlag::Error ArraycopySrcPrefetchDistanceConstraintFunc(uintx value, bool verbose) { 293 if (value >= 4032) { 294 JVMFlag::printError(verbose, 295 "ArraycopySrcPrefetchDistance (" UINTX_FORMAT ") must be" 296 "between 0 and 4031\n", value); 297 return JVMFlag::VIOLATES_CONSTRAINT; 298 } 299 300 return JVMFlag::SUCCESS; 301 } 302 303 JVMFlag::Error TypeProfileLevelConstraintFunc(uintx value, bool verbose) { 304 for (int i = 0; i < 3; i++) { 305 if (value % 10 > 2) { 306 JVMFlag::printError(verbose, 307 "Invalid value (" UINTX_FORMAT ") " 308 "in TypeProfileLevel at position %d\n", value, i); 309 return JVMFlag::VIOLATES_CONSTRAINT; 310 } 311 value = value / 10; 312 } 313 314 return JVMFlag::SUCCESS; 315 } 316 317 JVMFlag::Error InitArrayShortSizeConstraintFunc(intx value, bool verbose) { 318 if (value % BytesPerLong != 0) { 319 return JVMFlag::VIOLATES_CONSTRAINT; 320 } else { 321 return JVMFlag::SUCCESS; 322 } 323 } 324 325 #ifdef COMPILER2 326 JVMFlag::Error InteriorEntryAlignmentConstraintFunc(intx value, bool verbose) { 327 if (InteriorEntryAlignment > CodeEntryAlignment) { 328 JVMFlag::printError(verbose, 329 "InteriorEntryAlignment (" INTX_FORMAT ") must be " 330 "less than or equal to CodeEntryAlignment (" INTX_FORMAT ")\n", 331 InteriorEntryAlignment, CodeEntryAlignment); 332 return JVMFlag::VIOLATES_CONSTRAINT; 333 } 334 335 if (!is_power_of_2(value)) { 336 JVMFlag::printError(verbose, 337 "InteriorEntryAlignment (" INTX_FORMAT ") must be " 338 "a power of two\n", InteriorEntryAlignment); 339 return JVMFlag::VIOLATES_CONSTRAINT; 340 } 341 342 int minimum_alignment = 16; 343 #if defined(X86) && !defined(AMD64) 344 minimum_alignment = 4; 345 #elif defined(S390) 346 minimum_alignment = 2; 347 #endif 348 349 if (InteriorEntryAlignment < minimum_alignment) { 350 JVMFlag::printError(verbose, 351 "InteriorEntryAlignment (" INTX_FORMAT ") must be " 352 "greater than or equal to %d\n", 353 InteriorEntryAlignment, minimum_alignment); 354 return JVMFlag::VIOLATES_CONSTRAINT; 355 } 356 357 return JVMFlag::SUCCESS; 358 } 359 360 JVMFlag::Error NodeLimitFudgeFactorConstraintFunc(intx value, bool verbose) { 361 if (value < MaxNodeLimit * 2 / 100 || value > MaxNodeLimit * 40 / 100) { 362 JVMFlag::printError(verbose, 363 "NodeLimitFudgeFactor must be between 2%% and 40%% " 364 "of MaxNodeLimit (" INTX_FORMAT ")\n", 365 MaxNodeLimit); 366 return JVMFlag::VIOLATES_CONSTRAINT; 367 } 368 369 return JVMFlag::SUCCESS; 370 } 371 #endif // COMPILER2 372 373 JVMFlag::Error RTMTotalCountIncrRateConstraintFunc(int value, bool verbose) { 374 #if INCLUDE_RTM_OPT 375 if (UseRTMLocking && !is_power_of_2(RTMTotalCountIncrRate)) { 376 JVMFlag::printError(verbose, 377 "RTMTotalCountIncrRate (%d) must be " 378 "a power of 2, resetting it to 64\n", 379 RTMTotalCountIncrRate); 380 FLAG_SET_DEFAULT(RTMTotalCountIncrRate, 64); 381 } 382 #endif 383 384 return JVMFlag::SUCCESS; 385 }