--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/runtime/flags/jvmFlagConstraintsCompiler.cpp Mon Apr 23 10:59:39 2018 -0500
@@ -0,0 +1,408 @@
+/*
+ * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "code/relocInfo.hpp"
+#include "compiler/compilerDefinitions.hpp"
+#include "oops/metadata.hpp"
+#include "runtime/os.hpp"
+#include "interpreter/invocationCounter.hpp"
+#include "runtime/arguments.hpp"
+#include "runtime/flags/jvmFlag.hpp"
+#include "runtime/flags/jvmFlagConstraintsCompiler.hpp"
+#include "runtime/flags/jvmFlagRangeList.hpp"
+#include "runtime/globals.hpp"
+#include "runtime/globals_extension.hpp"
+#include "utilities/defaultStream.hpp"
+
+JVMFlag::Error AliasLevelConstraintFunc(intx value, bool verbose) {
+ if ((value <= 1) && (Arguments::mode() == Arguments::_comp || Arguments::mode() == Arguments::_mixed)) {
+ CommandLineError::print(verbose,
+ "AliasLevel (" INTX_FORMAT ") is not "
+ "compatible with -Xcomp or -Xmixed\n",
+ value);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ } else {
+ return JVMFlag::SUCCESS;
+ }
+}
+
+/**
+ * Validate the minimum number of compiler threads needed to run the
+ * JVM. The following configurations are possible.
+ *
+ * 1) The JVM is build using an interpreter only. As a result, the minimum number of
+ * compiler threads is 0.
+ * 2) The JVM is build using the compiler(s) and tiered compilation is disabled. As
+ * a result, either C1 or C2 is used, so the minimum number of compiler threads is 1.
+ * 3) The JVM is build using the compiler(s) and tiered compilation is enabled. However,
+ * the option "TieredStopAtLevel < CompLevel_full_optimization". As a result, only
+ * C1 can be used, so the minimum number of compiler threads is 1.
+ * 4) The JVM is build using the compilers and tiered compilation is enabled. The option
+ * 'TieredStopAtLevel = CompLevel_full_optimization' (the default value). As a result,
+ * the minimum number of compiler threads is 2.
+ */
+JVMFlag::Error CICompilerCountConstraintFunc(intx value, bool verbose) {
+ int min_number_of_compiler_threads = 0;
+#if !defined(COMPILER1) && !defined(COMPILER2) && !INCLUDE_JVMCI
+ // case 1
+#else
+ if (!TieredCompilation || (TieredStopAtLevel < CompLevel_full_optimization)) {
+ min_number_of_compiler_threads = 1; // case 2 or case 3
+ } else {
+ min_number_of_compiler_threads = 2; // case 4 (tiered)
+ }
+#endif
+
+ // The default CICompilerCount's value is CI_COMPILER_COUNT.
+ // With a client VM, -XX:+TieredCompilation causes TieredCompilation
+ // to be true here (the option is validated later) and
+ // min_number_of_compiler_threads to exceed CI_COMPILER_COUNT.
+ min_number_of_compiler_threads = MIN2(min_number_of_compiler_threads, CI_COMPILER_COUNT);
+
+ if (value < (intx)min_number_of_compiler_threads) {
+ CommandLineError::print(verbose,
+ "CICompilerCount (" INTX_FORMAT ") must be "
+ "at least %d \n",
+ value, min_number_of_compiler_threads);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ } else {
+ return JVMFlag::SUCCESS;
+ }
+}
+
+JVMFlag::Error AllocatePrefetchDistanceConstraintFunc(intx value, bool verbose) {
+ if (value < 0 || value > 512) {
+ CommandLineError::print(verbose,
+ "AllocatePrefetchDistance (" INTX_FORMAT ") must be "
+ "between 0 and " INTX_FORMAT "\n",
+ AllocatePrefetchDistance, 512);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+ return JVMFlag::SUCCESS;
+}
+
+JVMFlag::Error AllocatePrefetchStepSizeConstraintFunc(intx value, bool verbose) {
+ if (AllocatePrefetchStyle == 3) {
+ if (value % wordSize != 0) {
+ CommandLineError::print(verbose,
+ "AllocatePrefetchStepSize (" INTX_FORMAT ") must be multiple of %d\n",
+ value, wordSize);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+ }
+ return JVMFlag::SUCCESS;
+}
+
+JVMFlag::Error AllocatePrefetchInstrConstraintFunc(intx value, bool verbose) {
+ intx max_value = max_intx;
+#if defined(SPARC)
+ max_value = 1;
+#elif defined(X86)
+ max_value = 3;
+#endif
+ if (value < 0 || value > max_value) {
+ CommandLineError::print(verbose,
+ "AllocatePrefetchInstr (" INTX_FORMAT ") must be "
+ "between 0 and " INTX_FORMAT "\n", value, max_value);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+ return JVMFlag::SUCCESS;
+}
+
+JVMFlag::Error CompileThresholdConstraintFunc(intx value, bool verbose) {
+ if (value < 0 || value > INT_MAX >> InvocationCounter::count_shift) {
+ CommandLineError::print(verbose,
+ "CompileThreshold (" INTX_FORMAT ") "
+ "must be between 0 and %d\n",
+ value,
+ INT_MAX >> InvocationCounter::count_shift);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+ return JVMFlag::SUCCESS;
+}
+
+JVMFlag::Error OnStackReplacePercentageConstraintFunc(intx value, bool verbose) {
+ int backward_branch_limit;
+ if (ProfileInterpreter) {
+ if (OnStackReplacePercentage < InterpreterProfilePercentage) {
+ CommandLineError::print(verbose,
+ "OnStackReplacePercentage (" INTX_FORMAT ") must be "
+ "larger than InterpreterProfilePercentage (" INTX_FORMAT ")\n",
+ OnStackReplacePercentage, InterpreterProfilePercentage);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+ backward_branch_limit = ((CompileThreshold * (OnStackReplacePercentage - InterpreterProfilePercentage)) / 100)
+ << InvocationCounter::count_shift;
+
+ if (backward_branch_limit < 0) {
+ CommandLineError::print(verbose,
+ "CompileThreshold * (InterpreterProfilePercentage - OnStackReplacePercentage) / 100 = "
+ INTX_FORMAT " "
+ "must be between 0 and " INTX_FORMAT ", try changing "
+ "CompileThreshold, InterpreterProfilePercentage, and/or OnStackReplacePercentage\n",
+ (CompileThreshold * (OnStackReplacePercentage - InterpreterProfilePercentage)) / 100,
+ INT_MAX >> InvocationCounter::count_shift);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+ } else {
+ if (OnStackReplacePercentage < 0 ) {
+ CommandLineError::print(verbose,
+ "OnStackReplacePercentage (" INTX_FORMAT ") must be "
+ "non-negative\n", OnStackReplacePercentage);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+ backward_branch_limit = ((CompileThreshold * OnStackReplacePercentage) / 100)
+ << InvocationCounter::count_shift;
+
+ if (backward_branch_limit < 0) {
+ CommandLineError::print(verbose,
+ "CompileThreshold * OnStackReplacePercentage / 100 = " INTX_FORMAT " "
+ "must be between 0 and " INTX_FORMAT ", try changing "
+ "CompileThreshold and/or OnStackReplacePercentage\n",
+ (CompileThreshold * OnStackReplacePercentage) / 100,
+ INT_MAX >> InvocationCounter::count_shift);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+ }
+ return JVMFlag::SUCCESS;
+}
+
+JVMFlag::Error CodeCacheSegmentSizeConstraintFunc(uintx value, bool verbose) {
+ if (CodeCacheSegmentSize < (uintx)CodeEntryAlignment) {
+ CommandLineError::print(verbose,
+ "CodeCacheSegmentSize (" UINTX_FORMAT ") must be "
+ "larger than or equal to CodeEntryAlignment (" INTX_FORMAT ") "
+ "to align entry points\n",
+ CodeCacheSegmentSize, CodeEntryAlignment);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+ if (CodeCacheSegmentSize < sizeof(jdouble)) {
+ CommandLineError::print(verbose,
+ "CodeCacheSegmentSize (" UINTX_FORMAT ") must be "
+ "at least " SIZE_FORMAT " to align constants\n",
+ CodeCacheSegmentSize, sizeof(jdouble));
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+#ifdef COMPILER2
+ if (CodeCacheSegmentSize < (uintx)OptoLoopAlignment) {
+ CommandLineError::print(verbose,
+ "CodeCacheSegmentSize (" UINTX_FORMAT ") must be "
+ "larger than or equal to OptoLoopAlignment (" INTX_FORMAT ") "
+ "to align inner loops\n",
+ CodeCacheSegmentSize, OptoLoopAlignment);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+#endif
+
+ return JVMFlag::SUCCESS;
+}
+
+JVMFlag::Error CompilerThreadPriorityConstraintFunc(intx value, bool verbose) {
+#ifdef SOLARIS
+ if ((value < MinimumPriority || value > MaximumPriority) &&
+ (value != -1) && (value != -FXCriticalPriority)) {
+ CommandLineError::print(verbose,
+ "CompileThreadPriority (" INTX_FORMAT ") must be "
+ "between %d and %d inclusively or -1 (means no change) "
+ "or %d (special value for critical thread class/priority)\n",
+ value, MinimumPriority, MaximumPriority, -FXCriticalPriority);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+#endif
+
+ return JVMFlag::SUCCESS;
+}
+
+JVMFlag::Error CodeEntryAlignmentConstraintFunc(intx value, bool verbose) {
+#ifdef SPARC
+ if (CodeEntryAlignment % relocInfo::addr_unit() != 0) {
+ CommandLineError::print(verbose,
+ "CodeEntryAlignment (" INTX_FORMAT ") must be "
+ "multiple of NOP size\n", CodeEntryAlignment);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+#endif
+
+ if (!is_power_of_2(value)) {
+ CommandLineError::print(verbose,
+ "CodeEntryAlignment (" INTX_FORMAT ") must be "
+ "a power of two\n", CodeEntryAlignment);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+ if (CodeEntryAlignment < 16) {
+ CommandLineError::print(verbose,
+ "CodeEntryAlignment (" INTX_FORMAT ") must be "
+ "greater than or equal to %d\n",
+ CodeEntryAlignment, 16);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+ return JVMFlag::SUCCESS;
+}
+
+JVMFlag::Error OptoLoopAlignmentConstraintFunc(intx value, bool verbose) {
+ if (!is_power_of_2(value)) {
+ CommandLineError::print(verbose,
+ "OptoLoopAlignment (" INTX_FORMAT ") "
+ "must be a power of two\n",
+ value);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+ // Relevant on ppc, s390, sparc. Will be optimized where
+ // addr_unit() == 1.
+ if (OptoLoopAlignment % relocInfo::addr_unit() != 0) {
+ CommandLineError::print(verbose,
+ "OptoLoopAlignment (" INTX_FORMAT ") must be "
+ "multiple of NOP size (%d)\n",
+ value, relocInfo::addr_unit());
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+ return JVMFlag::SUCCESS;
+}
+
+JVMFlag::Error ArraycopyDstPrefetchDistanceConstraintFunc(uintx value, bool verbose) {
+ if (value >= 4032) {
+ CommandLineError::print(verbose,
+ "ArraycopyDstPrefetchDistance (" UINTX_FORMAT ") must be"
+ "between 0 and 4031\n", value);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+ return JVMFlag::SUCCESS;
+}
+
+JVMFlag::Error ArraycopySrcPrefetchDistanceConstraintFunc(uintx value, bool verbose) {
+ if (value >= 4032) {
+ CommandLineError::print(verbose,
+ "ArraycopySrcPrefetchDistance (" UINTX_FORMAT ") must be"
+ "between 0 and 4031\n", value);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+ return JVMFlag::SUCCESS;
+}
+
+JVMFlag::Error TypeProfileLevelConstraintFunc(uintx value, bool verbose) {
+ for (int i = 0; i < 3; i++) {
+ if (value % 10 > 2) {
+ CommandLineError::print(verbose,
+ "Invalid value (" UINTX_FORMAT ") "
+ "in TypeProfileLevel at position %d\n", value, i);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+ value = value / 10;
+ }
+
+ return JVMFlag::SUCCESS;
+}
+
+JVMFlag::Error InitArrayShortSizeConstraintFunc(intx value, bool verbose) {
+ if (value % BytesPerLong != 0) {
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ } else {
+ return JVMFlag::SUCCESS;
+ }
+}
+
+#ifdef COMPILER2
+JVMFlag::Error InteriorEntryAlignmentConstraintFunc(intx value, bool verbose) {
+ if (InteriorEntryAlignment > CodeEntryAlignment) {
+ CommandLineError::print(verbose,
+ "InteriorEntryAlignment (" INTX_FORMAT ") must be "
+ "less than or equal to CodeEntryAlignment (" INTX_FORMAT ")\n",
+ InteriorEntryAlignment, CodeEntryAlignment);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+#ifdef SPARC
+ if (InteriorEntryAlignment % relocInfo::addr_unit() != 0) {
+ CommandLineError::print(verbose,
+ "InteriorEntryAlignment (" INTX_FORMAT ") must be "
+ "multiple of NOP size\n");
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+#endif
+
+ if (!is_power_of_2(value)) {
+ CommandLineError::print(verbose,
+ "InteriorEntryAlignment (" INTX_FORMAT ") must be "
+ "a power of two\n", InteriorEntryAlignment);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+ int minimum_alignment = 16;
+#if defined(SPARC) || (defined(X86) && !defined(AMD64))
+ minimum_alignment = 4;
+#elif defined(S390)
+ minimum_alignment = 2;
+#endif
+
+ if (InteriorEntryAlignment < minimum_alignment) {
+ CommandLineError::print(verbose,
+ "InteriorEntryAlignment (" INTX_FORMAT ") must be "
+ "greater than or equal to %d\n",
+ InteriorEntryAlignment, minimum_alignment);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+ return JVMFlag::SUCCESS;
+}
+
+JVMFlag::Error NodeLimitFudgeFactorConstraintFunc(intx value, bool verbose) {
+ if (value < MaxNodeLimit * 2 / 100 || value > MaxNodeLimit * 40 / 100) {
+ CommandLineError::print(verbose,
+ "NodeLimitFudgeFactor must be between 2%% and 40%% "
+ "of MaxNodeLimit (" INTX_FORMAT ")\n",
+ MaxNodeLimit);
+ return JVMFlag::VIOLATES_CONSTRAINT;
+ }
+
+ return JVMFlag::SUCCESS;
+}
+#endif // COMPILER2
+
+JVMFlag::Error RTMTotalCountIncrRateConstraintFunc(int value, bool verbose) {
+#if INCLUDE_RTM_OPT
+ if (UseRTMLocking && !is_power_of_2(RTMTotalCountIncrRate)) {
+ CommandLineError::print(verbose,
+ "RTMTotalCountIncrRate (" INTX_FORMAT
+ ") must be a power of 2, resetting it to 64\n",
+ RTMTotalCountIncrRate);
+ FLAG_SET_DEFAULT(RTMTotalCountIncrRate, 64);
+ }
+#endif
+
+ return JVMFlag::SUCCESS;
+}