8304265: Implementation of Foreign Function and Memory API (Third Preview)

make/autoconf/configure.ac

@@ -223,6 +223,10 @@ JDKOPT_SETUP_UNDEFINED_BEHAVIOR_SANITIZER
 # LeakSanitizer
 JDKOPT_SETUP_LEAK_SANITIZER
 
+# Fallback linker
+# This needs to go before 'LIB_DETERMINE_DEPENDENCIES'
+JDKOPT_SETUP_FALLBACK_LINKER
+
 ###############################################################################
 #
 # Check dependencies for external and internal libraries.

make/autoconf/jdk-options.m4

@@ -903,3 +903,22 @@ AC_DEFUN([JDKOPT_SETUP_MACOSX_SIGNING],
     AC_SUBST(MACOSX_CODESIGN_MODE)
   fi
 ])
+
+################################################################################
+#
+# fallback linker
+#
+AC_DEFUN_ONCE([JDKOPT_SETUP_FALLBACK_LINKER],
+[
+  FALLBACK_LINKER_DEFAULT=false
+
+  if HOTSPOT_CHECK_JVM_VARIANT(zero); then
+    FALLBACK_LINKER_DEFAULT=true
+  fi
+
+  UTIL_ARG_ENABLE(NAME: fallback-linker, DEFAULT: $FALLBACK_LINKER_DEFAULT,
+      RESULT: ENABLE_FALLBACK_LINKER,
+      DESC: [enable libffi-based fallback implementation of java.lang.foreign.Linker],
+      CHECKING_MSG: [if fallback linker enabled])
+  AC_SUBST(ENABLE_FALLBACK_LINKER)
+])

make/autoconf/libraries.m4

@@ -82,7 +82,7 @@ AC_DEFUN_ONCE([LIB_DETERMINE_DEPENDENCIES],
   fi
 
   # Check if ffi is needed
-  if HOTSPOT_CHECK_JVM_VARIANT(zero); then
+  if HOTSPOT_CHECK_JVM_VARIANT(zero) || test "x$ENABLE_FALLBACK_LINKER" = "xtrue"; then
     NEEDS_LIB_FFI=true
   else
     NEEDS_LIB_FFI=false

make/autoconf/spec.gmk.in

@@ -409,6 +409,9 @@ TEST_JOBS?=@TEST_JOBS@
 DEFAULT_MAKE_TARGET:=@DEFAULT_MAKE_TARGET@
 DEFAULT_LOG:=@DEFAULT_LOG@
 
+# Fallback linker
+ENABLE_FALLBACK_LINKER:=@ENABLE_FALLBACK_LINKER@
+
 FREETYPE_TO_USE:=@FREETYPE_TO_USE@
 FREETYPE_LIBS:=@FREETYPE_LIBS@
 FREETYPE_CFLAGS:=@FREETYPE_CFLAGS@

make/conf/jib-profiles.js

@@ -587,11 +587,12 @@ var getJibProfilesProfiles = function (input, common, data) {
         "linux-x64-zero": {
             target_os: "linux",
             target_cpu: "x64",
-            dependencies: ["devkit", "gtest"],
+            dependencies: ["devkit", "gtest", "libffi"],
             configure_args: concat(common.configure_args_64bit, [
                 "--with-zlib=system",
                 "--with-jvm-variants=zero",
-                "--enable-libffi-bundling"
+                "--with-libffi=" + input.get("libffi", "home_path"),
+                "--enable-libffi-bundling",
             ])
         },
 
@@ -744,6 +745,40 @@ var getJibProfilesProfiles = function (input, common, data) {
             common.debug_profile_artifacts(artifactData[name]));
     });
 
+    // Define artifact just for linux-x64-zero, which is the only one we test on
+    ["linux-x64"].forEach(function (name) {
+        var o = artifactData[name]
+        var pf = o.platform
+        var jdk_subdir = (o.jdk_subdir != null ? o.jdk_subdir : "jdk-" + data.version);
+        var jdk_suffix = (o.jdk_suffix != null ? o.jdk_suffix : "tar.gz");
+        var zeroName = name + "-zero";
+        profiles[zeroName].artifacts = {
+            jdk: {
+                local: "bundles/\\(jdk.*bin." + jdk_suffix + "\\)",
+                remote: [
+                    "bundles/" + pf + "/jdk-" + data.version + "_" + pf + "_bin-zero." + jdk_suffix,
+                ],
+                subdir: jdk_subdir,
+                exploded: "images/jdk",
+            },
+            test: {
+                    local: "bundles/\\(jdk.*bin-tests.tar.gz\\)",
+                    remote: [
+                        "bundles/" + pf + "/jdk-" + data.version + "_" + pf + "_bin-zero-tests.tar.gz",
+                    ],
+                    exploded: "images/test"
+            },
+            jdk_symbols: {
+                    local: "bundles/\\(jdk.*bin-symbols.tar.gz\\)",
+                    remote: [
+                        "bundles/" + pf + "/jdk-" + data.version + "_" + pf + "_bin-zero-symbols.tar.gz",
+                    ],
+                    subdir: jdk_subdir,
+                    exploded: "images/jdk"
+                },
+            };
+    });
+
     buildJdkDep = input.build_os + "-" + input.build_cpu + ".jdk";
     docsProfiles = {
         "docs": {
@@ -1234,6 +1269,13 @@ var getJibProfilesDependencies = function (input, common) {
             ext: "tar.gz",
             revision: "1.13.0+1.0"
         },
+
+        libffi: {
+            organization: common.organization,
+            module: "libffi-" + input.build_platform,
+            ext: "tar.gz",
+            revision: "3.4.2+1.0"
+        },
     };
 
     return dependencies;

make/data/hotspot-symbols/symbols-shared

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2016, 2023, 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
@@ -30,5 +30,6 @@ jio_vsnprintf
 JNI_CreateJavaVM
 JNI_GetCreatedJavaVMs
 JNI_GetDefaultJavaVMInitArgs
+JVM_IsForeignLinkerSupported
 JVM_FindClassFromBootLoader
 JVM_InitAgentProperties

make/devkit/createLibffiBundle.sh

@@ -0,0 +1,111 @@
+#!/bin/bash
+#
+# Copyright (c) 2023, 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.
+#
+
+# This script generates a libffi bundle. On linux by building it from source
+# using a devkit, which should match the devkit used to build the JDK.
+#
+# Set MAKE_ARGS to add parameters to make. Ex:
+#
+# $ MAKE_ARGS=-j32 bash createLibffiBundle.sh
+#
+# The script tries to behave well on multiple invocations, only performing steps
+# not already done. To redo a step, manually delete the target files from that
+# step.
+#
+# Note that the libtool and texinfo packages are needed to build libffi
+# $ sudo apt install libtool texinfo
+
+LIBFFI_VERSION=3.4.2
+
+BUNDLE_NAME=libffi-$LIBFFI_VERSION.tar.gz
+
+SCRIPT_FILE="$(basename $0)"
+SCRIPT_DIR="$(cd "$(dirname $0)" > /dev/null && pwd)"
+OUTPUT_DIR="${SCRIPT_DIR}/../../build/libffi"
+SRC_DIR="$OUTPUT_DIR/src"
+DOWNLOAD_DIR="$OUTPUT_DIR/download"
+INSTALL_DIR="$OUTPUT_DIR/install"
+IMAGE_DIR="$OUTPUT_DIR/image"
+
+USAGE="$0 <devkit dir>"
+
+if [ "$1" = "" ]; then
+    echo $USAGE
+    exit 1
+fi
+DEVKIT_DIR="$1"
+
+# Download source distros
+mkdir -p $DOWNLOAD_DIR
+cd $DOWNLOAD_DIR
+SOURCE_TAR=v$LIBFFI_VERSION.tar.gz
+if [ ! -f $SOURCE_TAR ]; then
+    wget https://github.com/libffi/libffi/archive/refs/tags/v$LIBFFI_VERSION.tar.gz
+fi
+
+# Unpack src
+mkdir -p $SRC_DIR
+cd $SRC_DIR
+LIBFFI_DIRNAME=libffi-$LIBFFI_VERSION
+LIBFFI_DIR=$SRC_DIR/$LIBFFI_DIRNAME
+if [ ! -d $LIBFFI_DIRNAME ]; then
+    echo "Unpacking $SOURCE_TAR"
+    tar xf $DOWNLOAD_DIR/$SOURCE_TAR
+fi
+
+# Build
+cd $LIBFFI_DIR
+if [ ! -e $LIBFFI_DIR/configure ]; then
+  bash ./autogen.sh
+fi
+bash ./configure --prefix=$INSTALL_DIR CC=$DEVKIT_DIR/bin/gcc CXX=$DEVKIT_DIR/bin/g++
+
+# Run with nice to keep system usable during build.
+nice make $MAKE_ARGS install
+
+mkdir -p $IMAGE_DIR
+# Extract what we need into an image
+if [ ! -e $IMAGE_DIR/lib/libffi.so ]; then
+  echo "Copying libffi.so* to image"
+  mkdir -p $IMAGE_DIR/lib
+  cp -a $INSTALL_DIR/lib64/libffi.so* $IMAGE_DIR/lib/
+fi
+if [ ! -e $IMAGE_DIR/include/ ]; then
+  echo "Copying include to image"
+  mkdir -p $IMAGE_DIR/include
+  cp -a $INSTALL_DIR/include/. $IMAGE_DIR/include/
+fi
+if [ ! -e $IMAGE_DIR/$SCRIPT_FILE ]; then
+  echo "Copying this script to image"
+  cp -a $SCRIPT_DIR/$SCRIPT_FILE $IMAGE_DIR/
+fi
+
+# Create bundle
+if [ ! -e $OUTPUT_DIR/$BUNDLE_NAME ]; then
+  echo "Creating $OUTPUT_DIR/$BUNDLE_NAME"
+  cd $IMAGE_DIR
+  tar zcf $OUTPUT_DIR/$BUNDLE_NAME *
+fi

make/modules/java.base/Lib.gmk

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2022, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2023, 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
@@ -215,3 +215,18 @@ $(eval $(call SetupJdkLibrary, BUILD_SYSLOOKUPLIB, \
 ))
 
 TARGETS += $(BUILD_SYSLOOKUPLIB)
+
+################################################################################
+# Create fallback linker lib
+
+ifeq ($(ENABLE_FALLBACK_LINKER), true)
+  $(eval $(call SetupJdkLibrary, BUILD_LIBFALLBACKLINKER, \
+      NAME := fallbackLinker, \
+      CFLAGS := $(CFLAGS_JDKLIB) $(LIBFFI_CFLAGS), \
+      LDFLAGS := $(LDFLAGS_JDKLIB) \
+                 $(call SET_SHARED_LIBRARY_ORIGIN), \
+      LIBS := $(LIBFFI_LIBS), \
+  ))
+
+  TARGETS += $(BUILD_LIBFALLBACKLINKER)
+endif