/*

 * Copyright (c) 2015, 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 "runtime/arguments.hpp"

#include "runtime/commandLineFlagConstraintsCompiler.hpp"

#include "runtime/globals.hpp"

#include "utilities/defaultStream.hpp"

Flag::Error AliasLevelConstraintFunc(bool verbose, intx* value) {

  if ((*value <= 1) && (Arguments::mode() == Arguments::_comp)) {

    if (verbose == true) {

      jio_fprintf(defaultStream::error_stream(),

                "AliasLevel (" INTX_FORMAT ") is not compatible "

                "with -Xcomp \n",

                *value);

    }

    return Flag::VIOLATES_CONSTRAINT;

  } else {

    return Flag::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.

 */

Flag::Error CICompilerCountConstraintFunc(bool verbose, intx* value) {

  int min_number_of_compiler_threads = 0;

#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK)

  // 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) {

    if (verbose == true) {

      jio_fprintf(defaultStream::error_stream(),

                  "CICompilerCount=" INTX_FORMAT " must be at least %d \n",

                  *value, min_number_of_compiler_threads);

    }

    return Flag::VIOLATES_CONSTRAINT;

  } else {

    return Flag::SUCCESS;

  }

}