hotspot/src/share/vm/jvmci/jvmci_globals.hpp
author gziemski
Tue, 10 May 2016 12:10:21 -0500
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child 39117 59fa99a45873
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8073500: Prevent certain commercial flags from being changed at runtime Summary: Implement new writeable mechanism for flag control Reviewed-by: coleenp, iklam
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/*
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 * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_VM_JVMCI_JVMCIGLOBALS_HPP
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#define SHARE_VM_JVMCI_JVMCIGLOBALS_HPP
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#include "runtime/globals.hpp"
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//
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// Defines all global flags used by the JVMCI compiler. Only flags that need
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// to be accessible to the JVMCI C++ code should be defined here. All other
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// JVMCI flags should be defined in JVMCIOptions.java.
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//
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#define JVMCI_FLAGS(develop, \
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                    develop_pd, \
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                    product, \
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                    product_pd, \
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                    diagnostic, \
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                    experimental, \
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                    notproduct, \
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                    range, \
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                    constraint, \
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                    writeable) \
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                                                                            \
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  experimental(bool, EnableJVMCI, false,                                    \
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          "Enable JVMCI")                                                   \
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                                                                            \
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  experimental(bool, UseJVMCICompiler, false,                               \
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          "Use JVMCI as the default compiler")                              \
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                                                                            \
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  experimental(bool, BootstrapJVMCI, false,                                 \
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          "Bootstrap JVMCI before running Java main method")                \
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                                                                            \
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  experimental(bool, PrintBootstrap, true,                                  \
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          "Print JVMCI bootstrap progress and summary")                     \
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                                                                            \
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  experimental(intx, JVMCIThreads, 1,                                       \
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          "Force number of JVMCI compiler threads to use")                  \
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          range(1, max_jint)                                                \
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                                                                            \
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  experimental(intx, JVMCIHostThreads, 1,                                   \
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          "Force number of compiler threads for JVMCI host compiler")       \
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          range(1, max_jint)                                                \
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                                                                            \
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  experimental(bool, CodeInstallSafepointChecks, true,                      \
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          "Perform explicit safepoint checks while installing code")        \
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                                                                            \
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  NOT_COMPILER2(product(intx, MaxVectorSize, 64,                            \
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          "Max vector size in bytes, "                                      \
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          "actual size could be less depending on elements type"))          \
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                                                                            \
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  NOT_COMPILER2(product(bool, ReduceInitialCardMarks, true,                 \
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          "Defer write barriers of young objects"))                         \
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                                                                            \
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  experimental(intx, JVMCITraceLevel, 0,                                    \
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          "Trace level for JVMCI: "                                         \
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          "1 means emit a message for each CompilerToVM call,"              \
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          "levels greater than 1 provide progressively greater detail")     \
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                                                                            \
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  experimental(intx, JVMCICounterSize, 0,                                   \
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          "Reserved size for benchmark counters")                           \
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          range(0, max_jint)                                                \
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                                                                            \
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  experimental(bool, JVMCICountersExcludeCompiler, true,                    \
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          "Exclude JVMCI compiler threads from benchmark counters")         \
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                                                                            \
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  develop(bool, JVMCIUseFastLocking, true,                                  \
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          "Use fast inlined locking code")                                  \
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                                                                            \
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  experimental(intx, JVMCINMethodSizeLimit, (80*K)*wordSize,                \
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          "Maximum size of a compiled method.")                             \
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                                                                            \
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  develop(bool, TraceUncollectedSpeculations, false,                        \
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          "Print message when a failed speculation was not collected")
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// Read default values for JVMCI globals
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JVMCI_FLAGS(DECLARE_DEVELOPER_FLAG, \
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            DECLARE_PD_DEVELOPER_FLAG, \
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            DECLARE_PRODUCT_FLAG, \
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            DECLARE_PD_PRODUCT_FLAG, \
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            DECLARE_DIAGNOSTIC_FLAG, \
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            DECLARE_EXPERIMENTAL_FLAG, \
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            DECLARE_NOTPRODUCT_FLAG, \
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            IGNORE_RANGE, \
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            IGNORE_CONSTRAINT, \
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            IGNORE_WRITEABLE)
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class JVMCIGlobals {
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 public:
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  // Return true if jvmci flags are consistent.
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  static bool check_jvmci_flags_are_consistent();
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  // Print jvmci arguments inconsistency error message.
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  static void print_jvmci_args_inconsistency_error_message();
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};
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#endif // SHARE_VM_JVMCI_JVMCIGLOBALS_HPP