/*
 * Copyright (c) 2005, 2020, 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.
 *
 */

#ifndef OS_LINUX_GLOBALS_LINUX_HPP
#define OS_LINUX_GLOBALS_LINUX_HPP

//
// Declare Linux specific flags. They are not available on other platforms.
//
#include "runtime/flags/jvmFlag.hpp"
PRODUCT_FLAG(bool,     UseOprofile, false, JVMFlag::DEFAULT,
                       "enable support for Oprofile profiler");


    //   NB: The default value of UseLinuxPosixThreadCPUClocks may be   
    //  overridden in Arguments::parse_each_vm_init_arg.                
PRODUCT_FLAG(bool,     UseLinuxPosixThreadCPUClocks, true, JVMFlag::DEFAULT,
                       "enable fast Linux Posix clocks where available");

PRODUCT_FLAG(bool,     UseHugeTLBFS, false, JVMFlag::DEFAULT,
                       "Use MAP_HUGETLB for large pages");

PRODUCT_FLAG(bool,     UseTransparentHugePages, false, JVMFlag::DEFAULT,
                       "Use MADV_HUGEPAGE for large pages");

PRODUCT_FLAG(bool,     LoadExecStackDllInVMThread, true, JVMFlag::DEFAULT,
                       "Load DLLs with executable-stack attribute in the VM Thread");

PRODUCT_FLAG(bool,     UseSHM, false, JVMFlag::DEFAULT,
                       "Use SYSV shared memory for large pages");

PRODUCT_FLAG(bool,     UseContainerSupport, true, JVMFlag::DEFAULT,
                       "Enable detection and runtime container configuration support");

PRODUCT_FLAG(bool,     PreferContainerQuotaForCPUCount, true, JVMFlag::DEFAULT,
                       "Calculate the container CPU availability based on the value"
                       " of quotas (if set), when true. Otherwise, use the CPU"
                       " shares value, provided it is less than quota.");

PRODUCT_FLAG(bool,     AdjustStackSizeForTLS, false, JVMFlag::DEFAULT,
                       "Increase the thread stack size to include space for glibc "
                       "static thread-local storage (TLS) if true");

PRODUCT_FLAG(bool,     DumpPrivateMappingsInCore, true, JVMFlag::DIAGNOSTIC,
                       "If true, sets bit 2 of /proc/PID/coredump_filter, thus "
                       "resulting in file-backed private mappings of the process to "
                       "be dumped into the corefile.");

PRODUCT_FLAG(bool,     DumpSharedMappingsInCore, true, JVMFlag::DIAGNOSTIC,
                       "If true, sets bit 3 of /proc/PID/coredump_filter, thus "
                       "resulting in file-backed shared mappings of the process to "
                       "be dumped into the corefile.");

PRODUCT_FLAG(bool,     UseCpuAllocPath, false, JVMFlag::DIAGNOSTIC,
                       "Use CPU_ALLOC code path in os::active_processor_count ");

//
// Define Linux-specific default values. The flags are available on all
// platforms, but they may have different default values on other platforms.
//
define_pd_global(bool, UseLargePages, false);
define_pd_global(bool, UseLargePagesIndividualAllocation, false);
define_pd_global(bool, UseOSErrorReporting, false);
define_pd_global(bool, UseThreadPriorities, true) ;

#endif // OS_LINUX_GLOBALS_LINUX_HPP