JDK-8253947: Implementation: JEP 388: Windows AArch64 Support

make/autoconf/basics.m4

@@ -672,6 +672,16 @@ AC_DEFUN([BASIC_EVAL_DEVKIT_VARIABLE],
   fi
 ])
 
+###############################################################################
+# Evaluates platform specific overrides for build devkit variables.
+# $1: Name of variable
+AC_DEFUN([BASIC_EVAL_BUILD_DEVKIT_VARIABLE],
+[
+  if test "x[$]$1" = x; then
+    eval $1="\${$1_${OPENJDK_BUILD_CPU}}"
+  fi
+])
+
 ###############################################################################
 AC_DEFUN_ONCE([BASIC_SETUP_DEVKIT],
 [

make/autoconf/basics_windows.m4

@@ -381,10 +381,44 @@ AC_DEFUN_ONCE([BASIC_COMPILE_FIXPATH],
   # called fixpath.
   FIXPATH=
   if test "x$OPENJDK_BUILD_OS" = xwindows; then
-    AC_MSG_CHECKING([if fixpath can be created])
     FIXPATH_SRC="$TOPDIR/make/src/native/fixpath.c"
-    FIXPATH_BIN="$CONFIGURESUPPORT_OUTPUTDIR/bin/fixpath.exe"
     FIXPATH_DIR="$CONFIGURESUPPORT_OUTPUTDIR/fixpath"
+
+    if test "x$OPENJDK_TARGET_CPU" != "xaarch64"; then
+      AC_MSG_CHECKING([if fixpath can be created])
+
+      FIXPATH_BIN="$CONFIGURESUPPORT_OUTPUTDIR/bin/fixpath.exe"
+      FIXPATH_SRC_W="$FIXPATH_SRC"
+      FIXPATH_BIN_W="$FIXPATH_BIN"
+      BASIC_WINDOWS_REWRITE_AS_WINDOWS_MIXED_PATH([FIXPATH_SRC_W])
+      BASIC_WINDOWS_REWRITE_AS_WINDOWS_MIXED_PATH([FIXPATH_BIN_W])
+      $RM -rf $FIXPATH_BIN $FIXPATH_DIR
+      $MKDIR -p $FIXPATH_DIR $CONFIGURESUPPORT_OUTPUTDIR/bin
+      cd $FIXPATH_DIR
+      $CC $FIXPATH_SRC_W -Fe$FIXPATH_BIN_W > $FIXPATH_DIR/fixpath1.log 2>&1
+      cd $CURDIR
+
+      if test ! -x $FIXPATH_BIN; then
+        AC_MSG_RESULT([no])
+        cat $FIXPATH_DIR/fixpath1.log
+        AC_MSG_ERROR([Could not create $FIXPATH_BIN])
+      fi
+      AC_MSG_RESULT([yes])
+
+    else # OPENJDK_TARGET_CPU is aarch64
+      AC_MSG_CHECKING([if fixpath is in place])
+
+      FIXPATH_BIN="$TOPDIR/fixpath.exe"
+      $RM -rf $FIXPATH_DIR
+      $MKDIR -p $FIXPATH_DIR
+
+      if test ! -x $FIXPATH_BIN; then
+        AC_MSG_RESULT([no])
+        AC_MSG_ERROR([Could not find fixpath.exe under $TOPDIR])
+      fi
+      AC_MSG_RESULT([yes])
+    fi
+
     if test "x$OPENJDK_BUILD_OS_ENV" = xwindows.cygwin; then
       # Important to keep the .exe suffix on Cygwin for Hotspot makefiles
       FIXPATH="$FIXPATH_BIN -c"
@@ -396,22 +430,7 @@ AC_DEFUN_ONCE([BASIC_COMPILE_FIXPATH],
       fixpath_argument_list=`echo $all_unique_prefixes  | tr ' ' '@'`
       FIXPATH="$FIXPATH_BIN -m$fixpath_argument_list"
     fi
-    FIXPATH_SRC_W="$FIXPATH_SRC"
-    FIXPATH_BIN_W="$FIXPATH_BIN"
-    BASIC_WINDOWS_REWRITE_AS_WINDOWS_MIXED_PATH([FIXPATH_SRC_W])
-    BASIC_WINDOWS_REWRITE_AS_WINDOWS_MIXED_PATH([FIXPATH_BIN_W])
-    $RM -rf $FIXPATH_BIN $FIXPATH_DIR
-    $MKDIR -p $FIXPATH_DIR $CONFIGURESUPPORT_OUTPUTDIR/bin
-    cd $FIXPATH_DIR
-    $CC $FIXPATH_SRC_W -Fe$FIXPATH_BIN_W > $FIXPATH_DIR/fixpath1.log 2>&1
-    cd $CURDIR
 
-    if test ! -x $FIXPATH_BIN; then
-      AC_MSG_RESULT([no])
-      cat $FIXPATH_DIR/fixpath1.log
-      AC_MSG_ERROR([Could not create $FIXPATH_BIN])
-    fi
-    AC_MSG_RESULT([yes])
     AC_MSG_CHECKING([if fixpath.exe works])
     cd $FIXPATH_DIR
     $FIXPATH $CC $FIXPATH_SRC -Fe$FIXPATH_DIR/fixpath2.exe \

make/autoconf/flags-cflags.m4

@@ -705,7 +705,9 @@ AC_DEFUN([FLAGS_SETUP_CFLAGS_CPU_DEP],
       $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -DcpuIntel -Di586 -D$FLAGS_CPU_LEGACY_LIB"
     fi
   elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
-    if test "x$FLAGS_CPU" = xx86_64; then
+    if test "x$FLAGS_CPU" = xaarch64; then
+      $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_ARM64_ -Darm64"
+    elif test "x$FLAGS_CPU" = xx86_64; then
       $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_AMD64_ -Damd64"
     else
       $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_X86_ -Dx86"

make/autoconf/flags-ldflags.m4

@@ -188,15 +188,14 @@ AC_DEFUN([FLAGS_SETUP_LDFLAGS_CPU_DEP],
     fi
 
   elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
-    if test "x${OPENJDK_$1_CPU}" = "xx86"; then
-      $1_CPU_LDFLAGS="-safeseh"
-      # NOTE: Old build added -machine. Probably not needed.
-      $1_CPU_LDFLAGS_JVM_ONLY="-machine:I386"
+    if test "x${OPENJDK_$1_CPU_BITS}" = "x32"; then
       $1_CPU_EXECUTABLE_LDFLAGS="-stack:327680"
-    else
-      $1_CPU_LDFLAGS_JVM_ONLY="-machine:AMD64"
+    elif test "x${OPENJDK_$1_CPU_BITS}" = "x64"; then
       $1_CPU_EXECUTABLE_LDFLAGS="-stack:1048576"
     fi
+    if test "x${OPENJDK_$1_CPU}" = "xx86"; then
+      $1_CPU_LDFLAGS="-safeseh"
+    fi
   fi
 
   # JVM_VARIANT_PATH depends on if this is build or target...

make/autoconf/hotspot.m4

@@ -221,7 +221,7 @@ AC_DEFUN_ONCE([HOTSPOT_ENABLE_DISABLE_AOT],
 
   if test "x$ENABLE_AOT" = "xtrue"; then
     # Only enable AOT on X64 platforms.
-    if test "x$OPENJDK_TARGET_CPU" = "xx86_64" || test "x$OPENJDK_TARGET_CPU" = "xaarch64" ; then
+    if test "x$OPENJDK_TARGET_CPU" = "xx86_64" || test "x$OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU" = "xlinux-aarch64" ; then
       if test -e "${TOPDIR}/src/jdk.aot"; then
         if test -e "${TOPDIR}/src/jdk.internal.vm.compiler"; then
           ENABLE_AOT="true"
@@ -240,7 +240,7 @@ AC_DEFUN_ONCE([HOTSPOT_ENABLE_DISABLE_AOT],
     else
       ENABLE_AOT="false"
       if test "x$enable_aot" = "xyes"; then
-        AC_MSG_ERROR([AOT is currently only supported on x86_64 and aarch64. Remove --enable-aot.])
+        AC_MSG_ERROR([AOT is currently only supported on x86_64 and linux-aarch64. Remove --enable-aot.])
       fi
     fi
   fi
@@ -355,7 +355,11 @@ AC_DEFUN_ONCE([HOTSPOT_SETUP_JVM_FEATURES],
   # Only enable Shenandoah on supported arches, and only if requested
   AC_MSG_CHECKING([if shenandoah can be built])
   if HOTSPOT_CHECK_JVM_FEATURE(shenandoahgc); then
-    if test "x$OPENJDK_TARGET_CPU_ARCH" = "xx86" || test "x$OPENJDK_TARGET_CPU" = "xaarch64" ; then
+    if test "x$OPENJDK_TARGET_CPU_ARCH" = "xx86" ; then
+      AC_MSG_RESULT([yes])
+    elif test "x$OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU" = "xlinux-aarch64" ; then
+      AC_MSG_RESULT([yes])
+    elif test "x$OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU" = "xwindows-aarch64" ; then
       AC_MSG_RESULT([yes])
     else
       DISABLED_JVM_FEATURES="$DISABLED_JVM_FEATURES shenandoahgc"
@@ -412,7 +416,8 @@ AC_DEFUN_ONCE([HOTSPOT_SETUP_JVM_FEATURES],
     # Only enable jvmci on x86_64, sparcv9 and aarch64
     if test "x$OPENJDK_TARGET_CPU" = "xx86_64" || \
        test "x$OPENJDK_TARGET_CPU" = "xsparcv9" || \
-       test "x$OPENJDK_TARGET_CPU" = "xaarch64" ; then
+       test "x$OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU" = "xwindows-aarch64" || \
+       test "x$OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU" = "xlinux-aarch64" ; then
       AC_MSG_RESULT([yes])
       JVM_FEATURES_jvmci="jvmci"
       INCLUDE_JVMCI="true"
@@ -443,10 +448,11 @@ AC_DEFUN_ONCE([HOTSPOT_SETUP_JVM_FEATURES],
       JVM_FEATURES_graal="graal"
       INCLUDE_GRAAL="true"
     else
-      # By default enable graal build on x64 or where AOT is available.
+      # By default enable graal build on x64/aarch64 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$OPENJDK_TARGET_CPU" = "xaarch64" || \
            test "x$ENABLE_AOT" = "xtrue") ; then
         AC_MSG_RESULT([yes])
         JVM_FEATURES_graal="graal"

make/autoconf/toolchain.m4

@@ -918,14 +918,18 @@ AC_DEFUN_ONCE([TOOLCHAIN_SETUP_BUILD_COMPILERS],
           . $CONFIGURESUPPORT_OUTPUTDIR/build-devkit.info
           # This potentially sets the following:
           # A descriptive name of the devkit
-          BASIC_EVAL_DEVKIT_VARIABLE([BUILD_DEVKIT_NAME])
+          BASIC_EVAL_BUILD_DEVKIT_VARIABLE([BUILD_DEVKIT_NAME])
           # Corresponds to --with-extra-path
-          BASIC_EVAL_DEVKIT_VARIABLE([BUILD_DEVKIT_EXTRA_PATH])
+          BASIC_EVAL_BUILD_DEVKIT_VARIABLE([BUILD_DEVKIT_EXTRA_PATH])
           # Corresponds to --with-toolchain-path
-          BASIC_EVAL_DEVKIT_VARIABLE([BUILD_DEVKIT_TOOLCHAIN_PATH])
+          BASIC_EVAL_BUILD_DEVKIT_VARIABLE([BUILD_DEVKIT_TOOLCHAIN_PATH])
           # Corresponds to --with-sysroot
-          BASIC_EVAL_DEVKIT_VARIABLE([BUILD_DEVKIT_SYSROOT])
-          # Skip the Window specific parts
+          BASIC_EVAL_BUILD_DEVKIT_VARIABLE([BUILD_DEVKIT_SYSROOT])
+
+          if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
+            BASIC_EVAL_BUILD_DEVKIT_VARIABLE([BUILD_DEVKIT_VS_INCLUDE])
+            BASIC_EVAL_BUILD_DEVKIT_VARIABLE([BUILD_DEVKIT_VS_LIB])
+          fi
         fi
 
         AC_MSG_CHECKING([for build platform devkit])
@@ -935,13 +939,22 @@ AC_DEFUN_ONCE([TOOLCHAIN_SETUP_BUILD_COMPILERS],
           AC_MSG_RESULT([$BUILD_DEVKIT_ROOT])
         fi
 
-        BUILD_SYSROOT="$BUILD_DEVKIT_SYSROOT"
+        PATH="$BUILD_DEVKIT_EXTRA_PATH:$PATH"
 
-         # Fallback default of just /bin if DEVKIT_PATH is not defined
+        # Fallback default of just /bin if DEVKIT_PATH is not defined
         if test "x$BUILD_DEVKIT_TOOLCHAIN_PATH" = x; then
           BUILD_DEVKIT_TOOLCHAIN_PATH="$BUILD_DEVKIT_ROOT/bin"
         fi
-        PATH="$BUILD_DEVKIT_TOOLCHAIN_PATH:$BUILD_DEVKIT_EXTRA_PATH"
+        PATH="$BUILD_DEVKIT_TOOLCHAIN_PATH:$PATH"
+
+        BUILD_SYSROOT="$BUILD_DEVKIT_SYSROOT"
+
+        if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
+          BUILD_VS_INCLUDE="$BUILD_DEVKIT_VS_INCLUDE"
+          BUILD_VS_LIB="$BUILD_DEVKIT_VS_LIB"
+
+          TOOLCHAIN_SETUP_VISUAL_STUDIO_SYSROOT_FLAGS([BUILD_])
+        fi
       fi
     fi
 
@@ -967,9 +980,37 @@ AC_DEFUN_ONCE([TOOLCHAIN_SETUP_BUILD_COMPILERS],
     BASIC_FIXUP_EXECUTABLE(BUILD_STRIP)
     # Assume the C compiler is the assembler
     BUILD_AS="$BUILD_CC -c"
-    # Just like for the target compiler, use the compiler as linker
-    BUILD_LD="$BUILD_CC"
-    BUILD_LDCXX="$BUILD_CXX"
+    if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
+      # In the Microsoft toolchain we have a separate LD command "link".
+      # Make sure we reject /usr/bin/link (as determined in CYGWIN_LINK), which is
+      # a cygwin program for something completely different.
+      AC_CHECK_PROG([BUILD_LD], [link$EXE_SUFFIX],[link$EXE_SUFFIX],,, [$CYGWIN_LINK])
+      BASIC_FIXUP_EXECUTABLE(BUILD_LD)
+      # Verify that we indeed succeeded with this trick.
+      AC_MSG_CHECKING([if the found link.exe is actually the Visual Studio linker])
+
+      # Reset PATH since it can contain a mix of WSL/linux paths and Windows paths from VS,
+      # which, in combination with WSLENV, will make the WSL layer complain
+      old_path="$PATH"
+      PATH=
+
+      "$BUILD_LD" --version > /dev/null
+
+      if test $? -eq 0 ; then
+        AC_MSG_RESULT([no])
+        AC_MSG_ERROR([This is the Cygwin link tool. Please check your PATH and rerun configure.])
+      else
+        AC_MSG_RESULT([yes])
+      fi
+
+      PATH="$old_path"
+
+      BUILD_LDCXX="$BUILD_LD"
+    else
+      # Just like for the target compiler, use the compiler as linker
+      BUILD_LD="$BUILD_CC"
+      BUILD_LDCXX="$BUILD_CXX"
+    fi
 
     PATH="$OLDPATH"
 
@@ -1025,6 +1066,10 @@ AC_DEFUN_ONCE([TOOLCHAIN_MISC_CHECKS],
       if test "x$COMPILER_CPU_TEST" != "xx64"; then
         AC_MSG_ERROR([Target CPU mismatch. We are building for $OPENJDK_TARGET_CPU but CL is for "$COMPILER_CPU_TEST"; expected "x64".])
       fi
+    elif test "x$OPENJDK_TARGET_CPU" = "xaarch64"; then
+      if test "x$COMPILER_CPU_TEST" != "xARM64"; then
+        AC_MSG_ERROR([Target CPU mismatch. We are building for $OPENJDK_TARGET_CPU but CL is for "$COMPILER_CPU_TEST"; expected "arm64".])
+      fi
     fi
   fi