#

# Copyright (c) 2011, 2018, 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.  Oracle designates this

# particular file as subject to the "Classpath" exception as provided

# by Oracle in the LICENSE file that accompanied this code.

#

# 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.

#

# All valid JVM features, regardless of platform

VALID_JVM_FEATURES="compiler1 compiler2 zero minimal dtrace jvmti jvmci \

    graal vm-structs jni-check services management cmsgc epsilongc g1gc parallelgc serialgc shenandoahgc zgc nmt cds \

    static-build link-time-opt aot jfr"

# Deprecated JVM features (these are ignored, but with a warning)

DEPRECATED_JVM_FEATURES="trace"

# All valid JVM variants

VALID_JVM_VARIANTS="server client minimal core zero custom"

###############################################################################

# Check if the specified JVM variant should be built. To be used in shell if

# constructs, like this:

# if HOTSPOT_CHECK_JVM_VARIANT(server); then

#

# Only valid to use after HOTSPOT_SETUP_JVM_VARIANTS has setup variants.

# Definition kept in one line to allow inlining in if statements.

# Additional [] needed to keep m4 from mangling shell constructs.

AC_DEFUN([HOTSPOT_CHECK_JVM_VARIANT],

[ [ [[ " $JVM_VARIANTS " =~ " $1 " ]] ] ])

###############################################################################

# Check if the specified JVM feature is enabled. To be used in shell if

# constructs, like this:

# if HOTSPOT_CHECK_JVM_FEATURE(jvmti); then

#

# Only valid to use after HOTSPOT_SETUP_JVM_FEATURES has setup features.

# Definition kept in one line to allow inlining in if statements.

# Additional [] needed to keep m4 from mangling shell constructs.

AC_DEFUN([HOTSPOT_CHECK_JVM_FEATURE],

[ [ [[ " $JVM_FEATURES " =~ " $1 " ]] ] ])

###############################################################################

# Check if the specified JVM feature is explicitly disabled. To be used in

# shell if constructs, like this:

# if HOTSPOT_IS_JVM_FEATURE_DISABLED(jvmci); then

#

# This function is internal to hotspot.m4, and is only used when constructing

# the valid set of enabled JVM features. Users outside of hotspot.m4 should just

# use HOTSPOT_CHECK_JVM_FEATURE to check if a feature is enabled or not.

# Definition kept in one line to allow inlining in if statements.

# Additional [] needed to keep m4 from mangling shell constructs.

AC_DEFUN([HOTSPOT_IS_JVM_FEATURE_DISABLED],

[ [ [[ " $DISABLED_JVM_FEATURES " =~ " $1 " ]] ] ])

###############################################################################

# Check which variants of the JVM that we want to build. Available variants are:

#   server: normal interpreter, and a tiered C1/C2 compiler

#   client: normal interpreter, and C1 (no C2 compiler)

#   minimal: reduced form of client with optional features stripped out

#   core: normal interpreter only, no compiler

#   zero: C++ based interpreter only, no compiler

#   custom: baseline JVM with no default features

#

AC_DEFUN_ONCE([HOTSPOT_SETUP_JVM_VARIANTS],

[

  AC_ARG_WITH([jvm-variants], [AS_HELP_STRING([--with-jvm-variants],

      [JVM variants (separated by commas) to build (server,client,minimal,core,zero,custom) @<:@server@:>@])])

  if test "x$with_jvm_variants" = x; then

    with_jvm_variants="server"

  fi

  JVM_VARIANTS_OPT="$with_jvm_variants"

  # Has the user listed more than one variant?

  # Additional [] needed to keep m4 from mangling shell constructs.

  if [ [[ "$JVM_VARIANTS_OPT" =~ "," ]] ]; then

    BUILDING_MULTIPLE_JVM_VARIANTS=true

  else

    BUILDING_MULTIPLE_JVM_VARIANTS=false

  fi

  # Replace the commas with AND for use in the build directory name.

  JVM_VARIANTS_WITH_AND=`$ECHO "$JVM_VARIANTS_OPT" | $SED -e 's/,/AND/g'`

  AC_MSG_CHECKING([which variants of the JVM to build])

  # JVM_VARIANTS is a space-separated list.

  # Also use minimal, not minimal1 (which is kept for backwards compatibility).

  JVM_VARIANTS=`$ECHO $JVM_VARIANTS_OPT | $SED -e 's/,/ /g' -e 's/minimal1/minimal/'`

  AC_MSG_RESULT([$JVM_VARIANTS])

  # Check that the selected variants are valid

  BASIC_GET_NON_MATCHING_VALUES(INVALID_VARIANTS, $JVM_VARIANTS, $VALID_JVM_VARIANTS)

  if test "x$INVALID_VARIANTS" != x; then

    AC_MSG_NOTICE([Unknown variant(s) specified: "$INVALID_VARIANTS"])

    AC_MSG_NOTICE([The available JVM variants are: "$VALID_JVM_VARIANTS"])

    AC_MSG_ERROR([Cannot continue])

  fi

  # All "special" variants share the same output directory ("server")

  VALID_MULTIPLE_JVM_VARIANTS="server client minimal"

  BASIC_GET_NON_MATCHING_VALUES(INVALID_MULTIPLE_VARIANTS, $JVM_VARIANTS, $VALID_MULTIPLE_JVM_VARIANTS)

  if  test "x$INVALID_MULTIPLE_VARIANTS" != x && test "x$BUILDING_MULTIPLE_JVM_VARIANTS" = xtrue; then

    AC_MSG_ERROR([You cannot build multiple variants with anything else than $VALID_MULTIPLE_JVM_VARIANTS.])

  fi

  # The "main" variant is the one used by other libs to link against during the

  # build.

  if test "x$BUILDING_MULTIPLE_JVM_VARIANTS" = "xtrue"; then

    MAIN_VARIANT_PRIO_ORDER="server client minimal"

    for variant in $MAIN_VARIANT_PRIO_ORDER; do

      if HOTSPOT_CHECK_JVM_VARIANT($variant); then

        JVM_VARIANT_MAIN="$variant"

        break

      fi

    done

  else

    JVM_VARIANT_MAIN="$JVM_VARIANTS"

  fi

  AC_SUBST(JVM_VARIANTS)

  AC_SUBST(VALID_JVM_VARIANTS)

  AC_SUBST(JVM_VARIANT_MAIN)

  if HOTSPOT_CHECK_JVM_VARIANT(zero); then

    # zero behaves as a platform and rewrites these values. This is really weird. :(

    # We are guaranteed that we do not build any other variants when building zero.

    HOTSPOT_TARGET_CPU=zero

    HOTSPOT_TARGET_CPU_ARCH=zero

  fi

])

###############################################################################

# Check if dtrace should be enabled and has all prerequisites present.

#

AC_DEFUN_ONCE([HOTSPOT_SETUP_DTRACE],

[

  # Test for dtrace dependencies

  AC_ARG_ENABLE([dtrace], [AS_HELP_STRING([--enable-dtrace@<:@=yes/no/auto@:>@],

      [enable dtrace. Default is auto, where dtrace is enabled if all dependencies

      are present.])])

  DTRACE_DEP_MISSING=false

  AC_MSG_CHECKING([for dtrace tool])

  if test "x$DTRACE" != "x" && test -x "$DTRACE"; then

    AC_MSG_RESULT([$DTRACE])

  else

    AC_MSG_RESULT([not found, cannot build dtrace])

    DTRACE_DEP_MISSING=true

  fi

  AC_CHECK_HEADERS([sys/sdt.h], [DTRACE_HEADERS_OK=yes],[DTRACE_HEADERS_OK=no])

  if test "x$DTRACE_HEADERS_OK" != "xyes"; then

    DTRACE_DEP_MISSING=true

  fi

  AC_MSG_CHECKING([if dtrace should be built])

  if test "x$enable_dtrace" = "xyes"; then

    if test "x$DTRACE_DEP_MISSING" = "xtrue"; then

      AC_MSG_RESULT([no, missing dependencies])

      HELP_MSG_MISSING_DEPENDENCY([dtrace])

      AC_MSG_ERROR([Cannot enable dtrace with missing dependencies. See above. $HELP_MSG])

    else

      INCLUDE_DTRACE=true

      AC_MSG_RESULT([yes, forced])

    fi

  elif test "x$enable_dtrace" = "xno"; then

    INCLUDE_DTRACE=false

    AC_MSG_RESULT([no, forced])

  elif test "x$enable_dtrace" = "xauto" || test "x$enable_dtrace" = "x"; then

    if test "x$DTRACE_DEP_MISSING" = "xtrue"; then

      INCLUDE_DTRACE=false

      AC_MSG_RESULT([no, missing dependencies])

    else

      INCLUDE_DTRACE=true

      AC_MSG_RESULT([yes, dependencies present])

    fi

  else

    AC_MSG_ERROR([Invalid value for --enable-dtrace: $enable_dtrace])

  fi

])

################################################################################

# Check if AOT should be enabled

#

AC_DEFUN_ONCE([HOTSPOT_ENABLE_DISABLE_AOT],

[

  AC_ARG_ENABLE([aot], [AS_HELP_STRING([--enable-aot@<:@=yes/no/auto@:>@],

      [enable ahead of time compilation feature. Default is auto, where aot is enabled if all dependencies are present.])])

  if test "x$enable_aot" = "x" || test "x$enable_aot" = "xauto"; then

    ENABLE_AOT="true"

  elif test "x$enable_aot" = "xyes"; then

    ENABLE_AOT="true"

  elif test "x$enable_aot" = "xno"; then

    ENABLE_AOT="false"

  else

    AC_MSG_ERROR([Invalid value for --enable-aot: $enable_aot])

  fi

  if test "x$ENABLE_AOT" = "xtrue"; then

    # Only enable AOT on X64 platforms.

    if test "x$OPENJDK_TARGET_CPU" = "xx86_64" || test "x$OPENJDK_TARGET_CPU" = "xaarch64" ; then

      if test -e "${TOPDIR}/src/jdk.aot"; then

        if test -e "${TOPDIR}/src/jdk.internal.vm.compiler"; then

          ENABLE_AOT="true"

        else

          ENABLE_AOT="false"

          if test "x$enable_aot" = "xyes"; then

            AC_MSG_ERROR([Cannot build AOT without src/jdk.internal.vm.compiler sources. Remove --enable-aot.])

          fi

        fi

      else

        ENABLE_AOT="false"

        if test "x$enable_aot" = "xyes"; then

          AC_MSG_ERROR([Cannot build AOT without src/jdk.aot sources. Remove --enable-aot.])

        fi

      fi

    else

      ENABLE_AOT="false"

      if test "x$enable_aot" = "xyes"; then

        AC_MSG_ERROR([AOT is currently only supported on x86_64 and aarch64. Remove --enable-aot.])

      fi

    fi

  fi

  AC_SUBST(ENABLE_AOT)

])

################################################################################

# Allow to disable CDS

#

AC_DEFUN_ONCE([HOTSPOT_ENABLE_DISABLE_CDS],

[

  AC_ARG_ENABLE([cds], [AS_HELP_STRING([--enable-cds@<:@=yes/no/auto@:>@],

      [enable class data sharing feature in non-minimal VM. Default is auto, where cds is enabled if supported on the platform.])])

  if test "x$enable_cds" = "x" || test "x$enable_cds" = "xauto"; then

    ENABLE_CDS="true"

  elif test "x$enable_cds" = "xyes"; then

    ENABLE_CDS="true"

  elif test "x$enable_cds" = "xno"; then

    ENABLE_CDS="false"

  else

    AC_MSG_ERROR([Invalid value for --enable-cds: $enable_cds])

  fi

  AC_SUBST(ENABLE_CDS)

])

###############################################################################

# Set up all JVM features for each JVM variant.

#

AC_DEFUN_ONCE([HOTSPOT_SETUP_JVM_FEATURES],

[

  # Prettify the VALID_JVM_FEATURES string

  BASIC_SORT_LIST(VALID_JVM_FEATURES, $VALID_JVM_FEATURES)

  # The user can in some cases supply additional jvm features. For the custom

  # variant, this defines the entire variant.

  AC_ARG_WITH([jvm-features], [AS_HELP_STRING([--with-jvm-features],

      [JVM features to enable (foo) or disable (-foo), separated by comma. Use '--help' to show possible values @<:@none@:>@])])

  if test "x$with_jvm_features" != x; then

    AC_MSG_CHECKING([user specified JVM feature list])

    USER_JVM_FEATURE_LIST=`$ECHO $with_jvm_features | $SED -e 's/,/ /g'`

    AC_MSG_RESULT([$user_jvm_feature_list])

    # These features will be added to all variant defaults

    JVM_FEATURES=`$ECHO $USER_JVM_FEATURE_LIST | $AWK '{ for (i=1; i<=NF; i++) if (!match($i, /^-.*/)) printf("%s ", $i) }'`

    # These features will be removed from all variant defaults

    DISABLED_JVM_FEATURES=`$ECHO $USER_JVM_FEATURE_LIST | $AWK '{ for (i=1; i<=NF; i++) if (match($i, /^-.*/)) printf("%s ", substr($i, 2))}'`

    # Verify that the user has provided valid features

    BASIC_GET_NON_MATCHING_VALUES(INVALID_FEATURES, $JVM_FEATURES $DISABLED_JVM_FEATURES, $VALID_JVM_FEATURES $DEPRECATED_JVM_FEATURES)

    if test "x$INVALID_FEATURES" != x; then

      AC_MSG_NOTICE([Unknown JVM features specified: "$INVALID_FEATURES"])

      AC_MSG_NOTICE([The available JVM features are: "$VALID_JVM_FEATURES"])

      AC_MSG_ERROR([Cannot continue])

    fi

    # Check if the user has provided deprecated features

    BASIC_GET_MATCHING_VALUES(DEPRECATED_FEATURES, $JVM_FEATURES $DISABLED_JVM_FEATURES, $DEPRECATED_JVM_FEATURES)

    if test "x$DEPRECATED_FEATURES" != x; then

      AC_MSG_WARN([Deprecated JVM features specified (will be ignored): "$DEPRECATED_FEATURES"])

      # Filter out deprecated features

      BASIC_GET_NON_MATCHING_VALUES(JVM_FEATURES, $JVM_FEATURES, $DEPRECATED_FEATURES)

      BASIC_GET_NON_MATCHING_VALUES(DISABLED_JVM_FEATURES, $DISABLED_JVM_FEATURES, $DEPRECATED_FEATURES)

    fi

  fi

  # Override hotspot cpu definitions for ARM platforms

  if test "x$OPENJDK_TARGET_CPU" = xarm; then

    HOTSPOT_TARGET_CPU=arm_32

    HOTSPOT_TARGET_CPU_DEFINE="ARM32"

  fi

  # Verify that dependencies are met for explicitly set features.

  if HOTSPOT_CHECK_JVM_FEATURE(jvmti) && ! HOTSPOT_CHECK_JVM_FEATURE(services); then

    AC_MSG_ERROR([Specified JVM feature 'jvmti' requires feature 'services'])

  fi

  if HOTSPOT_CHECK_JVM_FEATURE(management) && ! HOTSPOT_CHECK_JVM_FEATURE(nmt); then

    AC_MSG_ERROR([Specified JVM feature 'management' requires feature 'nmt'])

  fi

  if HOTSPOT_CHECK_JVM_FEATURE(jvmci) && ! (HOTSPOT_CHECK_JVM_FEATURE(compiler1) || HOTSPOT_CHECK_JVM_FEATURE(compiler2)); then

    AC_MSG_ERROR([Specified JVM feature 'jvmci' requires feature 'compiler2' or 'compiler1'])

  fi

  if HOTSPOT_CHECK_JVM_FEATURE(cmsgc) && ! HOTSPOT_CHECK_JVM_FEATURE(serialgc); then

    AC_MSG_ERROR([Specified JVM feature 'cmsgc' requires feature 'serialgc'])

  fi

  # Enable JFR by default, except for Zero, linux-sparcv9 and on minimal.

  if ! HOTSPOT_CHECK_JVM_VARIANT(zero); then

    if test "x$OPENJDK_TARGET_OS" != xaix; then

      if test "x$OPENJDK_TARGET_OS" != xlinux || test "x$OPENJDK_TARGET_CPU" != xsparcv9; then

        NON_MINIMAL_FEATURES="$NON_MINIMAL_FEATURES jfr"

      fi

    fi

  fi

  # Only enable Shenandoah on supported arches

  AC_MSG_CHECKING([if shenandoah can be built])

  if test "x$OPENJDK_TARGET_CPU_ARCH" = "xx86" || test "x$OPENJDK_TARGET_CPU" = "xaarch64" ; then

    AC_MSG_RESULT([yes])

  else

    DISABLED_JVM_FEATURES="$DISABLED_JVM_FEATURES shenandoahgc"

    AC_MSG_RESULT([no, platform not supported])

  fi

  # Only enable ZGC on supported platforms

  AC_MSG_CHECKING([if zgc can be built])

  if (test "x$OPENJDK_TARGET_OS" = "xlinux" && test "x$OPENJDK_TARGET_CPU" = "xx86_64") || \

     (test "x$OPENJDK_TARGET_OS" = "xlinux" && test "x$OPENJDK_TARGET_CPU" = "xaarch64"); then

    AC_MSG_RESULT([yes])

  else

    DISABLED_JVM_FEATURES="$DISABLED_JVM_FEATURES zgc"

    AC_MSG_RESULT([no, platform not supported])

  fi

  # Disable unsupported GCs for Zero

  if HOTSPOT_CHECK_JVM_VARIANT(zero); then

    DISABLED_JVM_FEATURES="$DISABLED_JVM_FEATURES epsilongc g1gc zgc shenandoahgc"

  fi

  # Turn on additional features based on other parts of configure

  if test "x$INCLUDE_DTRACE" = "xtrue"; then

    JVM_FEATURES="$JVM_FEATURES dtrace"

  else

    if HOTSPOT_CHECK_JVM_FEATURE(dtrace); then

      AC_MSG_ERROR([To enable dtrace, you must use --enable-dtrace])

    fi

  fi

  if test "x$STATIC_BUILD" = "xtrue"; then

    JVM_FEATURES="$JVM_FEATURES static-build"

  else

    if HOTSPOT_CHECK_JVM_FEATURE(static-build); then

      AC_MSG_ERROR([To enable static-build, you must use --enable-static-build])

    fi

  fi

  if ! HOTSPOT_CHECK_JVM_VARIANT(zero); then

    if HOTSPOT_CHECK_JVM_FEATURE(zero); then

      AC_MSG_ERROR([To enable zero, you must use --with-jvm-variants=zero])

    fi

  fi

  AC_MSG_CHECKING([if jvmci module jdk.internal.vm.ci should be built])

  # Check if jvmci is diabled

  if HOTSPOT_IS_JVM_FEATURE_DISABLED(jvmci); then

    AC_MSG_RESULT([no, forced])

    JVM_FEATURES_jvmci=""

    INCLUDE_JVMCI="false"

  else

    # Only enable jvmci on x86_64 and aarch64

    if test "x$OPENJDK_TARGET_CPU" = "xx86_64" || \

       test "x$OPENJDK_TARGET_CPU" = "xaarch64" ; then

      AC_MSG_RESULT([yes])

      JVM_FEATURES_jvmci="jvmci"

      INCLUDE_JVMCI="true"

    else

      AC_MSG_RESULT([no])

      JVM_FEATURES_jvmci=""

      INCLUDE_JVMCI="false"

      if HOTSPOT_CHECK_JVM_FEATURE(jvmci); then

        AC_MSG_ERROR([JVMCI is currently not supported on this platform.])

      fi

    fi

  fi

  AC_SUBST(INCLUDE_JVMCI)

  AC_MSG_CHECKING([if graal module jdk.internal.vm.compiler should be built])

  # Check if graal is diabled

  if HOTSPOT_IS_JVM_FEATURE_DISABLED(graal); then

    AC_MSG_RESULT([no, forced])

    JVM_FEATURES_graal=""

    INCLUDE_GRAAL="false"

  else

    if HOTSPOT_CHECK_JVM_FEATURE(graal); then

      AC_MSG_RESULT([yes, forced])

      if test "x$JVM_FEATURES_jvmci" != "xjvmci" ; then

        AC_MSG_ERROR([Specified JVM feature 'graal' requires feature 'jvmci'])

      fi

      JVM_FEATURES_graal="graal"

      INCLUDE_GRAAL="true"

    else

      # By default enable graal build on x64 or where AOT is available.

      # graal build requires jvmci.

      if test "x$JVM_FEATURES_jvmci" = "xjvmci" && \

          (test "x$OPENJDK_TARGET_CPU" = "xx86_64" || \

           test "x$ENABLE_AOT" = "xtrue") ; then

        AC_MSG_RESULT([yes])

        JVM_FEATURES_graal="graal"

        INCLUDE_GRAAL="true"

      else

        AC_MSG_RESULT([no])

        JVM_FEATURES_graal=""

        INCLUDE_GRAAL="false"

      fi

    fi

  fi

  AC_SUBST(INCLUDE_GRAAL)

  # Disable aot with '--with-jvm-features=-aot'

  if HOTSPOT_IS_JVM_FEATURE_DISABLED(aot); then

    ENABLE_AOT="false"

  fi

  AC_MSG_CHECKING([if aot should be enabled])

  if test "x$ENABLE_AOT" = "xtrue"; then

    if test "x$JVM_FEATURES_graal" != "xgraal"; then

      if test "x$enable_aot" = "xyes" || HOTSPOT_CHECK_JVM_FEATURE(aot); then

        AC_MSG_RESULT([yes, forced])

        AC_MSG_ERROR([Specified JVM feature 'aot' requires feature 'graal'])

      else

        AC_MSG_RESULT([no])

      fi

      JVM_FEATURES_aot=""

      ENABLE_AOT="false"

    else

      if test "x$enable_aot" = "xyes" || HOTSPOT_CHECK_JVM_FEATURE(aot); then

        AC_MSG_RESULT([yes, forced])

      else

        AC_MSG_RESULT([yes])

      fi

      JVM_FEATURES_aot="aot"

    fi

  else

    if test "x$enable_aot" = "xno" || HOTSPOT_IS_JVM_FEATURE_DISABLED(aot); then

      AC_MSG_RESULT([no, forced])

    else

      AC_MSG_RESULT([no])

    fi

    JVM_FEATURES_aot=""

    if HOTSPOT_CHECK_JVM_FEATURE(aot); then

      AC_MSG_ERROR([To enable aot, you must use --enable-aot])

    fi

  fi

  AC_SUBST(ENABLE_AOT)

  if test "x$OPENJDK_TARGET_CPU" = xarm ; then

    # Default to use link time optimizations on minimal on arm

    JVM_FEATURES_link_time_opt="link-time-opt"

  else