/*

 * Copyright (c) 2000, 2019, 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 "jvm.h"

#include "jvmci/jvmci_globals.hpp"

#include "gc/shared/gcConfig.hpp"

#include "utilities/defaultStream.hpp"

#include "utilities/ostream.hpp"

#include "runtime/globals_extension.hpp"

fileStream* JVMCIGlobals::_jni_config_file = NULL;

// Return true if jvmci flags are consistent.

bool JVMCIGlobals::check_jvmci_flags_are_consistent() {

#ifndef PRODUCT

#define APPLY_JVMCI_FLAGS(params3, params4) \

  JVMCI_FLAGS(params4, params3, params4, params3, params4, params3, params4, params4, IGNORE_RANGE, IGNORE_CONSTRAINT, IGNORE_WRITEABLE)

#define JVMCI_DECLARE_CHECK4(type, name, value, doc) bool name##checked = false;

#define JVMCI_DECLARE_CHECK3(type, name, doc)        bool name##checked = false;

#define JVMCI_FLAG_CHECKED(name)                          name##checked = true;

  APPLY_JVMCI_FLAGS(JVMCI_DECLARE_CHECK3, JVMCI_DECLARE_CHECK4)

#else

#define JVMCI_FLAG_CHECKED(name)

#endif

  // Checks that a given flag is not set if a given guard flag is false.

#define CHECK_NOT_SET(FLAG, GUARD)                     \

  JVMCI_FLAG_CHECKED(FLAG)                             \

  if (!GUARD && !FLAG_IS_DEFAULT(FLAG)) {              \

    jio_fprintf(defaultStream::error_stream(),         \

        "Improperly specified VM option '%s': '%s' must be enabled\n", #FLAG, #GUARD); \

    return false;                                      \

  }

  JVMCI_FLAG_CHECKED(UseJVMCICompiler)

  JVMCI_FLAG_CHECKED(EnableJVMCI)

  CHECK_NOT_SET(BootstrapJVMCI,   UseJVMCICompiler)

  CHECK_NOT_SET(PrintBootstrap,   UseJVMCICompiler)

  CHECK_NOT_SET(JVMCIThreads,     UseJVMCICompiler)

  CHECK_NOT_SET(JVMCIHostThreads, UseJVMCICompiler)

  if (UseJVMCICompiler) {

    if (!FLAG_IS_DEFAULT(EnableJVMCI) && !EnableJVMCI) {

      jio_fprintf(defaultStream::error_stream(),

          "Improperly specified VM option UseJVMCICompiler: EnableJVMCI cannot be disabled\n");

      return false;

    }

    FLAG_SET_DEFAULT(EnableJVMCI, true);

    if (BootstrapJVMCI && UseJVMCINativeLibrary) {

      jio_fprintf(defaultStream::error_stream(), "-XX:+BootstrapJVMCI is not compatible with -XX:+UseJVMCINativeLibrary\n");

      return false;

    }

  }

  if (!EnableJVMCI) {

    // Switch off eager JVMCI initialization if JVMCI is disabled.

    // Don't throw error if EagerJVMCI is set to allow testing.

    if (EagerJVMCI) {

      FLAG_SET_DEFAULT(EagerJVMCI, false);

    }

  }

  JVMCI_FLAG_CHECKED(EagerJVMCI)

  CHECK_NOT_SET(JVMCITraceLevel,              EnableJVMCI)

  CHECK_NOT_SET(JVMCICounterSize,             EnableJVMCI)

  CHECK_NOT_SET(JVMCICountersExcludeCompiler, EnableJVMCI)

  CHECK_NOT_SET(JVMCIUseFastLocking,          EnableJVMCI)

  CHECK_NOT_SET(JVMCINMethodSizeLimit,        EnableJVMCI)

  CHECK_NOT_SET(MethodProfileWidth,           EnableJVMCI)

  CHECK_NOT_SET(JVMCIPrintProperties,         EnableJVMCI)

  CHECK_NOT_SET(UseJVMCINativeLibrary,        EnableJVMCI)

  CHECK_NOT_SET(JVMCILibPath,                 EnableJVMCI)

  CHECK_NOT_SET(JVMCILibDumpJNIConfig,        EnableJVMCI)

#ifndef PRODUCT

#define JVMCI_CHECK4(type, name, value, doc) assert(name##checked, #name " flag not checked");

#define JVMCI_CHECK3(type, name, doc)        assert(name##checked, #name " flag not checked");

  // Ensures that all JVMCI flags are checked by this method.

  APPLY_JVMCI_FLAGS(JVMCI_CHECK3, JVMCI_CHECK4)

#undef APPLY_JVMCI_FLAGS

#undef JVMCI_DECLARE_CHECK3

#undef JVMCI_DECLARE_CHECK4

#undef JVMCI_CHECK3

#undef JVMCI_CHECK4

#undef JVMCI_FLAG_CHECKED

#endif // PRODUCT

#undef CHECK_NOT_SET

  if (JVMCILibDumpJNIConfig != NULL) {

    _jni_config_file = new(ResourceObj::C_HEAP, mtJVMCI) fileStream(JVMCILibDumpJNIConfig);

    if (_jni_config_file == NULL || !_jni_config_file->is_open()) {

      jio_fprintf(defaultStream::error_stream(),

          "Could not open file for dumping JVMCI shared library JNI config: %s\n", JVMCILibDumpJNIConfig);

      return false;

    }

  }

  return true;

}

void JVMCIGlobals::check_jvmci_supported_gc() {

  if (EnableJVMCI) {

    // Check if selected GC is supported by JVMCI and Java compiler

    if (!(UseSerialGC || UseParallelGC || UseParallelOldGC || UseG1GC)) {

      vm_exit_during_initialization("JVMCI Compiler does not support selected GC", GCConfig::hs_err_name());

      FLAG_SET_DEFAULT(EnableJVMCI, false);

      FLAG_SET_DEFAULT(UseJVMCICompiler, false);

    }

  }

}