1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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  13  * accompanied this code).
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  24 
  25 #ifndef SHARE_JVMCI_JVMCI_GLOBALS_HPP
  26 #define SHARE_JVMCI_JVMCI_GLOBALS_HPP
  27 
  28 #include "runtime/flags/jvmFlag.hpp"
  29 
  30 class fileStream;
  31 
  32 //
  33 // Declare all global flags used by the JVMCI compiler. Only flags that need
  34 // to be accessible to the JVMCI C++ code should be defined here.
  35 //
  36 #include "utilities/macros.hpp"
  37 #if INCLUDE_JVMCI
  38 #include "runtime/flags/jvmFlag.hpp"
  39 PRODUCT_FLAG(bool,     EnableJVMCI, false, JVMFlag::EXPERIMENTAL,
  40                        "Enable JVMCI");
  41 
  42 PRODUCT_FLAG(bool,     EnableJVMCIProduct, false, JVMFlag::EXPERIMENTAL,
  43                        "Allow JVMCI to be used in product mode. This alters a subset of "
  44                        "JVMCI flags to be non-experimental, defaults UseJVMCICompiler "
  45                        "and EnableJVMCI to true and defaults UseJVMCINativeLibrary "
  46                        "to true if a JVMCI native library is available.");
  47 
  48 PRODUCT_FLAG(bool,     UseJVMCICompiler, false, JVMFlag::EXPERIMENTAL,
  49                        "Use JVMCI as the default compiler. Defaults to true if "
  50                        "EnableJVMCIProduct is true.");
  51 
  52 PRODUCT_FLAG(bool,     JVMCIPrintProperties, false, JVMFlag::EXPERIMENTAL,
  53                        "Prints properties used by the JVMCI compiler and exits");
  54 
  55 PRODUCT_FLAG(bool,     BootstrapJVMCI, false, JVMFlag::EXPERIMENTAL,
  56                        "Bootstrap JVMCI before running Java main method. This "
  57                        "initializes the compile queue with a small set of methods "
  58                        "and processes the queue until it is empty. Combining this with "
  59                        "-XX:-TieredCompilation makes JVMCI compile more of itself.");
  60 
  61 PRODUCT_FLAG(bool,     EagerJVMCI, false, JVMFlag::EXPERIMENTAL,
  62                        "Force eager JVMCI initialization");
  63 
  64 PRODUCT_FLAG(bool,     PrintBootstrap, true, JVMFlag::EXPERIMENTAL,
  65                        "Print JVMCI bootstrap progress and summary");
  66 
  67 PRODUCT_FLAG(intx,     JVMCIThreads, 1, JVMFlag::EXPERIMENTAL | JVMFlag::RANGE,
  68                        "Force number of JVMCI compiler threads to use. Ignored if "
  69                        "UseJVMCICompiler is false.");
  70    FLAG_RANGE(         JVMCIThreads, 1, max_jint);
  71 
  72 PRODUCT_FLAG(intx,     JVMCIHostThreads, 1, JVMFlag::EXPERIMENTAL | JVMFlag::RANGE,
  73                        "Force number of C1 compiler threads. Ignored if "
  74                        "UseJVMCICompiler is false.");
  75    FLAG_RANGE(         JVMCIHostThreads, 1, max_jint);
  76 
  77 NOT_COMPILER2(PRODUCT_FLAG(intx,     MaxVectorSize, 64, JVMFlag::RANGE,
  78                        "Max vector size in bytes, "
  79                        "actual size could be less depending on elements type");)
  80 
  81 NOT_COMPILER2(PRODUCT_FLAG(bool,     ReduceInitialCardMarks, true, JVMFlag::DEFAULT,
  82                        "Defer write barriers of young objects");)
  83 
  84 PRODUCT_FLAG(intx,     JVMCITraceLevel, 0, JVMFlag::EXPERIMENTAL | JVMFlag::RANGE,
  85                        "Trace level for JVMCI: "
  86                        "1 means emit a message for each CompilerToVM call,"
  87                        "levels greater than 1 provide progressively greater detail");
  88    FLAG_RANGE(         JVMCITraceLevel, 0, 6);
  89 
  90 PRODUCT_FLAG(intx,     JVMCICounterSize, 0, JVMFlag::EXPERIMENTAL | JVMFlag::RANGE,
  91                        "Reserved size for benchmark counters");
  92    FLAG_RANGE(         JVMCICounterSize, 0, 1000000);
  93 
  94 PRODUCT_FLAG(bool,     JVMCICountersExcludeCompiler, true, JVMFlag::EXPERIMENTAL,
  95                        "Exclude JVMCI compiler threads from benchmark counters");
  96 
  97 DEVELOP_FLAG(bool,     JVMCIUseFastLocking, true, JVMFlag::DEFAULT,
  98                        "Use fast inlined locking code");
  99 
 100 PRODUCT_FLAG(intx,     JVMCINMethodSizeLimit, (80*K)*wordSize, JVMFlag::EXPERIMENTAL | JVMFlag::RANGE,
 101                        "Maximum size of a compiled method.");
 102    FLAG_RANGE(         JVMCINMethodSizeLimit, 0, max_jint);
 103 
 104 PRODUCT_FLAG(ccstr,    JVMCILibPath, NULL, JVMFlag::EXPERIMENTAL,
 105                        "LD path for loading the JVMCI shared library");
 106 
 107 PRODUCT_FLAG(ccstr,    JVMCILibDumpJNIConfig, NULL, JVMFlag::EXPERIMENTAL,
 108                        "Dumps to the given file a description of the classes, fields "
 109                        "and methods the JVMCI shared library must provide");
 110 
 111 PRODUCT_FLAG(bool,     UseJVMCINativeLibrary, false, JVMFlag::EXPERIMENTAL,
 112                        "Execute JVMCI Java code from a shared library "
 113                        "instead of loading it from class files and executing it "
 114                        "on the HotSpot heap. Defaults to true if EnableJVMCIProduct is "
 115                        "true and a JVMCI native library is available.");
 116 
 117 NOT_COMPILER2(PRODUCT_FLAG(bool,     UseMultiplyToLenIntrinsic, false, JVMFlag::DIAGNOSTIC,
 118                        "Enables intrinsification of BigInteger.multiplyToLen()");)
 119 
 120 NOT_COMPILER2(PRODUCT_FLAG(bool,     UseSquareToLenIntrinsic, false, JVMFlag::DIAGNOSTIC,
 121                        "Enables intrinsification of BigInteger.squareToLen()");)
 122 
 123 NOT_COMPILER2(PRODUCT_FLAG(bool,     UseMulAddIntrinsic, false, JVMFlag::DIAGNOSTIC,
 124                        "Enables intrinsification of BigInteger.mulAdd()");)
 125 
 126 NOT_COMPILER2(PRODUCT_FLAG(bool,     UseMontgomeryMultiplyIntrinsic, false, JVMFlag::DIAGNOSTIC,
 127                        "Enables intrinsification of BigInteger.montgomeryMultiply()");)
 128 #endif // INCLUDE_JVMCI
 129 
 130 // The base name for the shared library containing the JVMCI based compiler
 131 #define JVMCI_SHARED_LIBRARY_NAME "jvmcicompiler"
 132 
 133 class JVMCIGlobals {
 134  private:
 135   static fileStream* _jni_config_file;
 136  public:
 137 
 138   // Returns true if jvmci flags are consistent. If not consistent,
 139   // an error message describing the inconsistency is printed before
 140   // returning false.
 141   static bool check_jvmci_flags_are_consistent();
 142 
 143   // Convert JVMCI experimental flags to product
 144   static bool enable_jvmci_product_mode(JVMFlag::Flags);
 145 
 146   // Check and exit VM with error if selected GC is not supported by JVMCI.
 147   static void check_jvmci_supported_gc();
 148 
 149   static fileStream* get_jni_config_file() { return _jni_config_file; }
 150 };
 151 #endif // SHARE_JVMCI_JVMCI_GLOBALS_HPP