8376168: RISC-V：Improve performance of copy_memory_v

Reviewed-by: cjplummer, amenkov, kevinw, aturbanov

.github/actions/build-jtreg/action.yml

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2023, 2025, 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

.github/actions/get-bundles/action.yml

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2022, 2025, 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

.github/actions/get-gtest/action.yml

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2022, 2025, 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

.github/actions/get-jtreg/action.yml

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2023, 2025, 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

.github/actions/get-msys2/action.yml

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2022, 2025, 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

.github/actions/upload-bundles/action.yml

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2022, 2025, 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

.github/workflows/build-alpine-linux.yml

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2024, 2025, 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
@@ -97,6 +97,7 @@ jobs:
           --with-zlib=system
           --with-jmod-compress=zip-1
           --with-external-symbols-in-bundles=none
+          --with-native-debug-symbols-level=1
           ${{ inputs.extra-conf-options }} ${{ inputs.configure-arguments }} || (
           echo "Dumping config.log:" &&
           cat config.log &&

.github/workflows/build-cross-compile.yml

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2022, 2025, 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
@@ -180,6 +180,7 @@ jobs:
           --with-sysroot=sysroot
           --with-jmod-compress=zip-1
           --with-external-symbols-in-bundles=none
+          --with-native-debug-symbols-level=1
           CC=${{ matrix.gnu-arch }}-linux-gnu${{ matrix.gnu-abi}}-gcc-${{ inputs.gcc-major-version }}
           CXX=${{ matrix.gnu-arch }}-linux-gnu${{ matrix.gnu-abi}}-g++-${{ inputs.gcc-major-version }}
           ${{ inputs.extra-conf-options }} ${{ inputs.configure-arguments }} || (

.github/workflows/build-linux.yml

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2022, 2025, 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
@@ -144,6 +144,7 @@ jobs:
           --with-zlib=system
           --with-jmod-compress=zip-1
           --with-external-symbols-in-bundles=none
+          --with-native-debug-symbols-level=1
           ${{ inputs.extra-conf-options }} ${{ inputs.configure-arguments }} || (
           echo "Dumping config.log:" &&
           cat config.log &&

.github/workflows/build-macos.yml

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2022, 2025, 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
@@ -111,6 +111,7 @@ jobs:
           --with-zlib=system
           --with-jmod-compress=zip-1
           --with-external-symbols-in-bundles=none
+          --with-native-debug-symbols-level=1
           ${{ inputs.extra-conf-options }} ${{ inputs.configure-arguments }} || (
           echo "Dumping config.log:" &&
           cat config.log &&

.github/workflows/build-windows.yml

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2022, 2025, 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

.github/workflows/main.yml

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2022, 2025, 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

.github/workflows/test.yml

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2022, 2025, 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

.jcheck/conf

@@ -1,7 +1,7 @@
 [general]
 project=jdk
 jbs=JDK
-version=26
+version=27
 
 [checks]
 error=author,committer,reviewers,merge,issues,executable,symlink,message,hg-tag,whitespace,problemlists,copyright

README.md

@@ -1,7 +1,7 @@
 # Welcome to the JDK!
 
 For build instructions please see the
-[online documentation](https://openjdk.org/groups/build/doc/building.html),
+[online documentation](https://git.openjdk.org/jdk/blob/master/doc/building.md),
 or either of these files:
 
 - [doc/building.html](doc/building.html) (html version)

bin/update_copyright_year.sh

@@ -1,7 +1,7 @@
 #!/bin/bash -f
 
 #
-# Copyright (c) 2010, 2025, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2010, 2026, 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
@@ -23,9 +23,13 @@
 # questions.
 #
 
-# Script to update the Copyright YEAR range in Mercurial & Git sources.
+# Script to update the Copyright YEAR range in Git sources.
 #  (Originally from xdono, Thanks!)
 
+# To update Copyright years for changes in a specific branch,
+# you use a command along these lines:
+# $ git diff upstream/master...<branch-name> | lsdiff | cut -d '/' -f 2-  | bash bin/update_copyright_year.sh -m -
+
 #------------------------------------------------------------
 copyright="Copyright"
 copyright_symbol="(c)"
@@ -47,7 +51,7 @@ rm -f -r ${tmp}
 mkdir -p ${tmp}
 total=0
 
-usage="Usage: `basename "$0"` [-c company] [-y year] [-h|f]"
+usage="Usage: `basename "$0"` [-c company] [-y year] [-m file] [-h|f]"
 Help()
 {
   # Display Help
@@ -65,15 +69,18 @@ Help()
   echo "-b     Specifies the base reference for change set lookup."
   echo "-f     Updates the copyright for all change sets in a given year,"
   echo "       as specified by -y. Overrides -b flag."
+  echo "-m     Read the list of modified files from the given file,"
+  echo "       use - to read from stdin"
   echo "-h     Print this help."
   echo
 }
 
 full_year=false
 base_reference=master
+modified_files_origin="";
 
 # Process options
-while getopts "b:c:fhy:" option; do
+while getopts "b:c:fhm:y:" option; do
   case $option in
     b) # supplied base reference
       base_reference=${OPTARG}
@@ -91,6 +98,9 @@ while getopts "b:c:fhy:" option; do
     y) # supplied company year
       year=${OPTARG}
       ;;
+    m) # modified files will be read from the given origin
+      modified_files_origin="${OPTARG}"
+      ;;
     \?) # illegal option
       echo "$usage"
       exit 1
@@ -110,18 +120,10 @@ git status &> /dev/null && git_found=true
 if [ "$git_found" != "true" ]; then
   echo "Error: Please execute script from within a JDK git repository."
   exit 1
-else
-  echo "Using Git version control system"
-  vcs_status=(git ls-files -m)
-  if [ "$full_year" = "true" ]; then
-    vcs_list_changesets=(git log --no-merges --since="${year}-01-01T00:00:00Z" --until="${year}-12-31T23:59:59Z" --pretty=tformat:"%H")
-  else
-    vcs_list_changesets=(git log --no-merges "${base_reference}..HEAD" --since="${year}-01-01T00:00:00Z" --until="${year}-12-31T23:59:59Z" --pretty=tformat:"%H")
-  fi
-  vcs_changeset_message=(git log -1 --pretty=tformat:"%B") # followed by ${changeset}
-  vcs_changeset_files=(git diff-tree --no-commit-id --name-only -r) # followed by ${changeset}
 fi
 
+echo "Using Git version control system"
+
 # Return true if it makes sense to edit this file
 saneFileToCheck()
 {
@@ -168,6 +170,25 @@ updateFile() # file
   echo "${changed}"
 }
 
+# Update the copyright year on files sent in stdin
+updateFiles() # stdin: list of files to update
+{
+  count=0
+  fcount=0
+  while read i; do
+    fcount=`expr ${fcount} '+' 1`
+    if [ `updateFile "${i}"` = "true" ] ; then
+      count=`expr ${count} '+' 1`
+    fi
+  done
+  if [ ${count} -gt 0 ] ; then
+    printf "  UPDATED year on %d of %d files.\n" ${count} ${fcount}
+    total=`expr ${total} '+' ${count}`
+   else
+    printf "  None of the %d files were changed.\n" ${fcount}
+  fi
+}
+
 # Update the copyright year on all files changed by this changeset
 updateChangesetFiles() # changeset
 {
@@ -178,18 +199,7 @@ updateChangesetFiles() # changeset
     | ${awk} -F' ' '{for(i=1;i<=NF;i++)print $i}' \
     > ${files}
   if [ -f "${files}" -a -s "${files}" ] ; then
-    fcount=`cat ${files}| wc -l`
-    for i in `cat ${files}` ; do
-      if [ `updateFile "${i}"` = "true" ] ; then
-        count=`expr ${count} '+' 1`
-      fi
-    done
-    if [ ${count} -gt 0 ] ; then
-      printf "  UPDATED year on %d of %d files.\n" ${count} ${fcount}
-      total=`expr ${total} '+' ${count}`
-    else
-      printf "  None of the %d files were changed.\n" ${fcount}
-    fi
+    cat ${files} | updateFiles
   else
     printf "  ERROR: No files changed in the changeset? Must be a mistake.\n"
     set -x
@@ -204,67 +214,80 @@ updateChangesetFiles() # changeset
 }
 
 # Check if repository is clean
+vcs_status=(git ls-files -m)
 previous=`"${vcs_status[@]}"|wc -l`
 if [ ${previous} -ne 0 ] ; then
   echo "WARNING: This repository contains previously edited working set files."
   echo "  ${vcs_status[*]} | wc -l = `"${vcs_status[@]}" | wc -l`"
 fi
 
-# Get all changesets this year
-all_changesets=${tmp}/all_changesets
-rm -f ${all_changesets}
-"${vcs_list_changesets[@]}" > ${all_changesets}
-
-# Check changeset to see if it is Copyright only changes, filter changesets
-if [ -s ${all_changesets} ] ; then
-  echo "Changesets made in ${year}: `cat ${all_changesets} | wc -l`"
-  index=0
-  cat ${all_changesets} | while read changeset ; do
-    index=`expr ${index} '+' 1`
-    desc=${tmp}/desc.${changeset}
-    rm -f ${desc}
-    echo "------------------------------------------------"
-    "${vcs_changeset_message[@]}" "${changeset}" > ${desc}
-    printf "%d: %s\n%s\n" ${index} "${changeset}" "`cat ${desc}|head -1`"
-    if [ "${year}" = "2010" ] ; then
-      if cat ${desc} | grep -i -F "Added tag" > /dev/null ; then
-        printf "  EXCLUDED tag changeset.\n"
-      elif cat ${desc} | grep -i -F rebrand > /dev/null ; then
-        printf "  EXCLUDED rebrand changeset.\n"
-      elif cat ${desc} | grep -i -F copyright > /dev/null ; then
-        printf "  EXCLUDED copyright changeset.\n"
-      else
-        updateChangesetFiles ${changeset}
-      fi
-    else
-      if cat ${desc} | grep -i -F "Added tag" > /dev/null ; then
-        printf "  EXCLUDED tag changeset.\n"
-      elif cat ${desc} | grep -i -F "copyright year" > /dev/null ; then
-        printf "  EXCLUDED copyright year changeset.\n"
-      else
-        updateChangesetFiles ${changeset}
-      fi
-    fi
-    rm -f ${desc}
-  done
-fi
-
-if [ ${total} -gt 0 ] ; then
-   echo "---------------------------------------------"
-   echo "Updated the copyright year on a total of ${total} files."
-   if [ ${previous} -eq 0 ] ; then
-     echo "This count should match the count of modified files in the repository: ${vcs_status[*]}"
-   else
-     echo "WARNING: This repository contained previously edited working set files."
-   fi
-   echo "  ${vcs_status[*]} | wc -l = `"${vcs_status[@]}" | wc -l`"
+if [ "x$modified_files_origin" != "x" ]; then
+  cat $modified_files_origin | updateFiles
 else
-   echo "---------------------------------------------"
-   echo "No files were changed"
-   if [ ${previous} -ne 0 ] ; then
-     echo "WARNING: This repository contained previously edited working set files."
-   fi
-   echo "  ${vcs_status[*]} | wc -l = `"${vcs_status[@]}" | wc -l`"
+  # Get all changesets this year
+  if [ "$full_year" = "true" ]; then
+    vcs_list_changesets=(git log --no-merges --since="${year}-01-01T00:00:00Z" --until="${year}-12-31T23:59:59Z" --pretty=tformat:"%H")
+  else
+    vcs_list_changesets=(git log --no-merges "${base_reference}..HEAD" --since="${year}-01-01T00:00:00Z" --until="${year}-12-31T23:59:59Z" --pretty=tformat:"%H")
+  fi
+  vcs_changeset_message=(git log -1 --pretty=tformat:"%B") # followed by ${changeset}
+  vcs_changeset_files=(git diff-tree --no-commit-id --name-only -r) # followed by ${changeset}
+
+  all_changesets=${tmp}/all_changesets
+  rm -f ${all_changesets}
+  "${vcs_list_changesets[@]}" > ${all_changesets}
+
+  # Check changeset to see if it is Copyright only changes, filter changesets
+  if [ -s ${all_changesets} ] ; then
+    echo "Changesets made in ${year}: `cat ${all_changesets} | wc -l`"
+    index=0
+    cat ${all_changesets} | while read changeset ; do
+      index=`expr ${index} '+' 1`
+      desc=${tmp}/desc.${changeset}
+      rm -f ${desc}
+      echo "------------------------------------------------"
+      "${vcs_changeset_message[@]}" "${changeset}" > ${desc}
+      printf "%d: %s\n%s\n" ${index} "${changeset}" "`cat ${desc}|head -1`"
+      if [ "${year}" = "2010" ] ; then
+        if cat ${desc} | grep -i -F "Added tag" > /dev/null ; then
+          printf "  EXCLUDED tag changeset.\n"
+        elif cat ${desc} | grep -i -F rebrand > /dev/null ; then
+          printf "  EXCLUDED rebrand changeset.\n"
+        elif cat ${desc} | grep -i -F copyright > /dev/null ; then
+          printf "  EXCLUDED copyright changeset.\n"
+        else
+          updateChangesetFiles ${changeset}
+        fi
+      else
+        if cat ${desc} | grep -i -F "Added tag" > /dev/null ; then
+          printf "  EXCLUDED tag changeset.\n"
+        elif cat ${desc} | grep -i -F "copyright year" > /dev/null ; then
+          printf "  EXCLUDED copyright year changeset.\n"
+        else
+          updateChangesetFiles ${changeset}
+        fi
+      fi
+      rm -f ${desc}
+    done
+  fi
+
+  if [ ${total} -gt 0 ] ; then
+     echo "---------------------------------------------"
+     echo "Updated the copyright year on a total of ${total} files."
+     if [ ${previous} -eq 0 ] ; then
+       echo "This count should match the count of modified files in the repository: ${vcs_status[*]}"
+     else
+       echo "WARNING: This repository contained previously edited working set files."
+     fi
+     echo "  ${vcs_status[*]} | wc -l = `"${vcs_status[@]}" | wc -l`"
+  else
+     echo "---------------------------------------------"
+     echo "No files were changed"
+     if [ ${previous} -ne 0 ] ; then
+       echo "WARNING: This repository contained previously edited working set files."
+     fi
+     echo "  ${vcs_status[*]} | wc -l = `"${vcs_status[@]}" | wc -l`"
+  fi
 fi
 
 # Cleanup

doc/building.html

@@ -1385,10 +1385,9 @@ dpkg-deb -x /tmp/libasound2-dev_1.0.25-4_armhf.deb .</code></pre></li>
 can specify it by <code>--with-alsa</code>.</p></li>
 </ul>
 <h4 id="x11-1">X11</h4>
-<p>You will need X11 libraries suitable for your <em>target</em> system.
-In most cases, using Debian's pre-built libraries work fine.</p>
-<p>Note that X11 is needed even if you only want to build a headless
-JDK.</p>
+<p>When not building a headless JDK, you will need X11 libraries
+suitable for your <em>target</em> system. In most cases, using Debian's
+pre-built libraries work fine.</p>
 <ul>
 <li><p>Go to <a href="https://www.debian.org/distrib/packages">Debian
 Package Search</a>, search for the following packages for your

doc/building.md

@@ -1178,10 +1178,8 @@ Note that alsa is needed even if you only want to build a headless JDK.
 
 #### X11
 
-You will need X11 libraries suitable for your *target* system. In most cases,
-using Debian's pre-built libraries work fine.
-
-Note that X11 is needed even if you only want to build a headless JDK.
+When not building a headless JDK, you will need X11 libraries suitable for your
+*target* system. In most cases, using Debian's pre-built libraries work fine.
 
 * Go to [Debian Package Search](https://www.debian.org/distrib/packages),
   search for the following packages for your *target* system, and download them

doc/hotspot-style.html

@@ -965,9 +965,8 @@ rather than <code>NULL</code>. See the paper for reasons to avoid
 <code>NULL</code>.</p>
 <p>Don't use (constant expression or literal) 0 for pointers. Note that
 C++14 removed non-literal 0 constants from <em>null pointer
-constants</em>, though some compilers continue to treat them as such.
-For historical reasons there may be lingering uses of 0 as a
-pointer.</p>
+constants</em>, though some compilers continue to treat them as
+such.</p>
 <h3 id="atomic">&lt;atomic&gt;</h3>
 <p>Do not use facilities provided by the <code>&lt;atomic&gt;</code>
 header (<a

doc/hotspot-style.md

@@ -884,8 +884,7 @@ rather than `NULL`.  See the paper for reasons to avoid `NULL`.
 
 Don't use (constant expression or literal) 0 for pointers.  Note that C++14
 removed non-literal 0 constants from _null pointer constants_, though some
-compilers continue to treat them as such.  For historical reasons there may be
-lingering uses of 0 as a pointer.
+compilers continue to treat them as such.
 
 ### <atomic>
 

make/RunTests.gmk

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2016, 2025, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2016, 2026, 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
@@ -873,7 +873,7 @@ define SetupRunJtregTestBody
     $1_JTREG_BASIC_OPTIONS += -testThreadFactoryPath:$$(JTREG_TEST_THREAD_FACTORY_JAR)
     $1_JTREG_BASIC_OPTIONS += -testThreadFactory:$$(JTREG_TEST_THREAD_FACTORY)
     $1_JTREG_BASIC_OPTIONS += $$(addprefix $$(JTREG_PROBLEM_LIST_PREFIX), $$(wildcard \
-	$$(addprefix $$($1_TEST_ROOT)/, ProblemList-$$(JTREG_TEST_THREAD_FACTORY).txt) \
+        $$(addprefix $$($1_TEST_ROOT)/, ProblemList-$$(JTREG_TEST_THREAD_FACTORY).txt) \
     ))
   endif
 
@@ -881,8 +881,8 @@ define SetupRunJtregTestBody
     AGENT := $$(LIBRARY_PREFIX)JvmtiStressAgent$$(SHARED_LIBRARY_SUFFIX)=$$(JTREG_JVMTI_STRESS_AGENT)
     $1_JTREG_BASIC_OPTIONS += -javaoption:'-agentpath:$(TEST_IMAGE_DIR)/hotspot/jtreg/native/$$(AGENT)'
     $1_JTREG_BASIC_OPTIONS += $$(addprefix $$(JTREG_PROBLEM_LIST_PREFIX), $$(wildcard \
-	    $$(addprefix $$($1_TEST_ROOT)/, ProblemList-jvmti-stress-agent.txt) \
-        ))
+        $$(addprefix $$($1_TEST_ROOT)/, ProblemList-jvmti-stress-agent.txt) \
+    ))
   endif
 
 
@@ -972,6 +972,10 @@ define SetupRunJtregTestBody
     JTREG_AUTO_PROBLEM_LISTS += ProblemList-enable-preview.txt
   endif
 
+  ifneq ($$(findstring -XX:+UseCompactObjectHeaders, $$(JTREG_ALL_OPTIONS)), )
+    JTREG_AUTO_PROBLEM_LISTS += ProblemList-coh.txt
+  endif
+
 
   ifneq ($$(JTREG_EXTRA_PROBLEM_LISTS), )
     # Accept both absolute paths as well as relative to the current test root.
@@ -1092,7 +1096,7 @@ define SetupRunJtregTestBody
 	$$(call MakeDir, $$($1_TEST_RESULTS_DIR) $$($1_TEST_SUPPORT_DIR) \
 	    $$($1_TEST_TMP_DIR))
 	$$(call ExecuteWithLog, $$($1_TEST_SUPPORT_DIR)/jtreg, \
-            $$(COV_ENVIRONMENT) $$($1_COMMAND_LINE) \
+	    $$(COV_ENVIRONMENT) $$($1_COMMAND_LINE) \
 	)
 
   $1_RESULT_FILE := $$($1_TEST_RESULTS_DIR)/text/stats.txt
@@ -1102,11 +1106,11 @@ define SetupRunJtregTestBody
 	$$(call LogWarn, Test report is stored in $$(strip \
 	    $$(subst $$(TOPDIR)/, , $$($1_TEST_RESULTS_DIR))))
 
-	# Read jtreg documentation to learn on the test stats categories:
-	# https://github.com/openjdk/jtreg/blob/master/src/share/doc/javatest/regtest/faq.md#what-do-all-those-numbers-in-the-test-results-line-mean
-	# In jtreg, "skipped:" category accounts for tests that threw jtreg.SkippedException at runtime.
-	# At the same time these tests contribute to "passed:" tests.
-	# In here we don't want that and so we substract number of "skipped:" from "passed:".
+        # Read jtreg documentation to learn on the test stats categories:
+        # https://github.com/openjdk/jtreg/blob/master/src/share/doc/javatest/regtest/faq.md#what-do-all-those-numbers-in-the-test-results-line-mean
+        # In jtreg, "skipped:" category accounts for tests that threw jtreg.SkippedException at runtime.
+        # At the same time these tests contribute to "passed:" tests.
+        # In here we don't want that and so we substract number of "skipped:" from "passed:".
 
 	$$(if $$(wildcard $$($1_RESULT_FILE)), \
 	  $$(eval $1_PASSED_AND_RUNTIME_SKIPPED := $$(shell $$(AWK) '{ gsub(/[,;]/, ""); \

make/RunTestsPrebuiltSpec.gmk

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2017, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2017, 2025, 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

make/autoconf/bootcycle-spec.gmk.template

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2025, 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

make/autoconf/buildjdk-spec.gmk.template

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2015, 2025, 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

make/autoconf/compare.sh.template

@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# Copyright (c) 2012, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2012, 2025, 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

make/autoconf/flags-cflags.m4

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2025, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2026, 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
@@ -69,6 +69,19 @@ AC_DEFUN([FLAGS_SETUP_DEBUG_SYMBOLS],
   # Debug prefix mapping if supported by compiler
   DEBUG_PREFIX_CFLAGS=
 
+  UTIL_ARG_WITH(NAME: native-debug-symbols-level, TYPE: literal,
+    DEFAULT: [auto], VALID_VALUES: [auto 1 2 3],
+    CHECK_AVAILABLE: [
+      if test x$TOOLCHAIN_TYPE = xmicrosoft; then
+        AVAILABLE=false
+      fi
+    ],
+    DESC: [set the native debug symbol level (GCC and Clang only)],
+    DEFAULT_DESC: [toolchain default],
+    IF_AUTO: [
+      RESULT=""
+    ])
+
   # Debug symbols
   if test "x$TOOLCHAIN_TYPE" = xgcc; then
     if test "x$ALLOW_ABSOLUTE_PATHS_IN_OUTPUT" = "xfalse"; then
@@ -93,8 +106,9 @@ AC_DEFUN([FLAGS_SETUP_DEBUG_SYMBOLS],
       )
     fi
 
-    CFLAGS_DEBUG_SYMBOLS="-g -gdwarf-4"
-    ASFLAGS_DEBUG_SYMBOLS="-g"
+    # Debug info level should follow the debug format to be effective.
+    CFLAGS_DEBUG_SYMBOLS="-gdwarf-4 -g${NATIVE_DEBUG_SYMBOLS_LEVEL}"
+    ASFLAGS_DEBUG_SYMBOLS="-g${NATIVE_DEBUG_SYMBOLS_LEVEL}"
   elif test "x$TOOLCHAIN_TYPE" = xclang; then
     if test "x$ALLOW_ABSOLUTE_PATHS_IN_OUTPUT" = "xfalse"; then
       # Check if compiler supports -fdebug-prefix-map. If so, use that to make
@@ -113,8 +127,9 @@ AC_DEFUN([FLAGS_SETUP_DEBUG_SYMBOLS],
     FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${GDWARF_FLAGS}],
         IF_FALSE: [GDWARF_FLAGS=""])
 
-    CFLAGS_DEBUG_SYMBOLS="-g ${GDWARF_FLAGS}"
-    ASFLAGS_DEBUG_SYMBOLS="-g"
+    # Debug info level should follow the debug format to be effective.
+    CFLAGS_DEBUG_SYMBOLS="${GDWARF_FLAGS} -g${NATIVE_DEBUG_SYMBOLS_LEVEL}"
+    ASFLAGS_DEBUG_SYMBOLS="-g${NATIVE_DEBUG_SYMBOLS_LEVEL}"
   elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
     CFLAGS_DEBUG_SYMBOLS="-Z7"
   fi
@@ -194,7 +209,10 @@ AC_DEFUN([FLAGS_SETUP_WARNINGS],
       BUILD_CC_DISABLE_WARNING_PREFIX="-wd"
       CFLAGS_WARNINGS_ARE_ERRORS="-WX"
 
-      WARNINGS_ENABLE_ALL="-W3"
+      WARNINGS_ENABLE_ALL_NORMAL="-W3"
+      WARNINGS_ENABLE_ADDITIONAL=""
+      WARNINGS_ENABLE_ADDITIONAL_CXX=""
+      WARNINGS_ENABLE_ADDITIONAL_JVM=""
       DISABLED_WARNINGS="4800 5105"
       ;;
 
@@ -203,14 +221,16 @@ AC_DEFUN([FLAGS_SETUP_WARNINGS],
       BUILD_CC_DISABLE_WARNING_PREFIX="-Wno-"
       CFLAGS_WARNINGS_ARE_ERRORS="-Werror"
 
+      WARNINGS_ENABLE_ALL_NORMAL="-Wall -Wextra"
+
       # Additional warnings that are not activated by -Wall and -Wextra
-      WARNINGS_ENABLE_ADDITIONAL="-Winvalid-pch -Wpointer-arith -Wreturn-type \
+      WARNINGS_ENABLE_ADDITIONAL="-Wformat=2 \
+          -Winvalid-pch -Wpointer-arith -Wreturn-type \
           -Wsign-compare -Wtrampolines -Wtype-limits -Wundef -Wuninitialized \
           -Wunused-const-variable=1 -Wunused-function -Wunused-result \
           -Wunused-value"
       WARNINGS_ENABLE_ADDITIONAL_CXX="-Woverloaded-virtual -Wreorder"
-      WARNINGS_ENABLE_ALL_CFLAGS="-Wall -Wextra -Wformat=2 $WARNINGS_ENABLE_ADDITIONAL"
-      WARNINGS_ENABLE_ALL_CXXFLAGS="$WARNINGS_ENABLE_ALL_CFLAGS $WARNINGS_ENABLE_ADDITIONAL_CXX"
+      WARNINGS_ENABLE_ADDITIONAL_JVM="-Wzero-as-null-pointer-constant"
 
       # These warnings will never be turned on, since they generate too many
       # false positives.
@@ -226,16 +246,24 @@ AC_DEFUN([FLAGS_SETUP_WARNINGS],
       BUILD_CC_DISABLE_WARNING_PREFIX="-Wno-"
       CFLAGS_WARNINGS_ARE_ERRORS="-Werror"
 
+      WARNINGS_ENABLE_ALL_NORMAL="-Wall -Wextra"
+
       # Additional warnings that are not activated by -Wall and -Wextra
-      WARNINGS_ENABLE_ADDITIONAL="-Wpointer-arith -Wsign-compare -Wreorder \
+      WARNINGS_ENABLE_ADDITIONAL="-Wformat=2 \
+          -Wpointer-arith -Wsign-compare -Wreorder \
           -Wunused-function -Wundef -Wunused-value -Woverloaded-virtual"
-      WARNINGS_ENABLE_ALL="-Wall -Wextra -Wformat=2 $WARNINGS_ENABLE_ADDITIONAL"
+      WARNINGS_ENABLE_ADDITIONAL_CXX=""
+      WARNINGS_ENABLE_ADDITIONAL_JVM="-Wzero-as-null-pointer-constant"
 
       # These warnings will never be turned on, since they generate too many
       # false positives.
       DISABLED_WARNINGS="unknown-warning-option unused-parameter"
       ;;
   esac
+  WARNINGS_ENABLE_ALL="$WARNINGS_ENABLE_ALL_NORMAL $WARNINGS_ENABLE_ADDITIONAL"
+  WARNINGS_ENABLE_ALL_CXX="$WARNINGS_ENABLE_ALL $WARNINGS_ENABLE_ADDITIONAL_CXX"
+  WARNINGS_ENABLE_ALL_JVM="$WARNINGS_ENABLE_ALL_CXX $WARNINGS_ENABLE_ADDITIONAL_JVM"
+
   AC_SUBST(DISABLE_WARNING_PREFIX)
   AC_SUBST(BUILD_CC_DISABLE_WARNING_PREFIX)
   AC_SUBST(CFLAGS_WARNINGS_ARE_ERRORS)
@@ -589,19 +617,9 @@ AC_DEFUN([FLAGS_SETUP_CFLAGS_HELPER],
   ADLC_LANGSTD_CXXFLAGS="$LANGSTD_CXXFLAGS"
 
   # CFLAGS WARNINGS STUFF
-  # Set JVM_CFLAGS warning handling
-  if test "x$TOOLCHAIN_TYPE" = xgcc; then
-    WARNING_CFLAGS_JDK_CONLY="$WARNINGS_ENABLE_ALL_CFLAGS"
-    WARNING_CFLAGS_JDK_CXXONLY="$WARNINGS_ENABLE_ALL_CXXFLAGS"
-    WARNING_CFLAGS_JVM="$WARNINGS_ENABLE_ALL_CXXFLAGS"
-
-  elif test "x$TOOLCHAIN_TYPE" = xclang; then
-    WARNING_CFLAGS="$WARNINGS_ENABLE_ALL"
-
-  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
-    WARNING_CFLAGS="$WARNINGS_ENABLE_ALL"
-
-  fi
+  WARNING_CFLAGS_JDK_CONLY="$WARNINGS_ENABLE_ALL"
+  WARNING_CFLAGS_JDK_CXXONLY="$WARNINGS_ENABLE_ALL_CXX"
+  WARNING_CFLAGS_JVM="$WARNINGS_ENABLE_ALL_JVM"
 
   # Set some additional per-OS defines.
 
@@ -863,12 +881,12 @@ AC_DEFUN([FLAGS_SETUP_CFLAGS_CPU_DEP],
   CFLAGS_JVM_COMMON="$ALWAYS_CFLAGS_JVM $ALWAYS_DEFINES_JVM \
       $TOOLCHAIN_CFLAGS_JVM ${$1_TOOLCHAIN_CFLAGS_JVM} \
       $OS_CFLAGS $OS_CFLAGS_JVM $CFLAGS_OS_DEF_JVM $DEBUG_CFLAGS_JVM \
-      $WARNING_CFLAGS $WARNING_CFLAGS_JVM $JVM_PICFLAG $FILE_MACRO_CFLAGS \
+      $WARNING_CFLAGS_JVM $JVM_PICFLAG $FILE_MACRO_CFLAGS \
       $REPRODUCIBLE_CFLAGS $BRANCH_PROTECTION_CFLAGS"
 
   CFLAGS_JDK_COMMON="$ALWAYS_DEFINES_JDK $TOOLCHAIN_CFLAGS_JDK \
       $OS_CFLAGS $CFLAGS_OS_DEF_JDK $DEBUG_CFLAGS_JDK $DEBUG_OPTIONS_FLAGS_JDK \
-      $WARNING_CFLAGS $WARNING_CFLAGS_JDK $DEBUG_SYMBOLS_CFLAGS_JDK \
+      $DEBUG_SYMBOLS_CFLAGS_JDK \
       $FILE_MACRO_CFLAGS $REPRODUCIBLE_CFLAGS $BRANCH_PROTECTION_CFLAGS"
 
   # Use ${$2EXTRA_CFLAGS} to block EXTRA_CFLAGS to be added to build flags.

make/autoconf/flags-ldflags.m4

@@ -63,7 +63,7 @@ AC_DEFUN([FLAGS_SETUP_LDFLAGS_HELPER],
     fi
 
     BASIC_LDFLAGS_JVM_ONLY=""
-    LDFLAGS_LTO="-flto=auto -fuse-linker-plugin -fno-strict-aliasing"
+    LDFLAGS_LTO="-flto=auto -fuse-linker-plugin -fno-strict-aliasing $DEBUG_PREFIX_CFLAGS"
 
     LDFLAGS_CXX_PARTIAL_LINKING="$MACHINE_FLAG -r"
 
@@ -71,7 +71,7 @@ AC_DEFUN([FLAGS_SETUP_LDFLAGS_HELPER],
     BASIC_LDFLAGS_JVM_ONLY="-mno-omit-leaf-frame-pointer -mstack-alignment=16 \
         -fPIC"
 
-    LDFLAGS_LTO="-flto=auto -fuse-linker-plugin -fno-strict-aliasing"
+    LDFLAGS_LTO="-flto=auto -fuse-linker-plugin -fno-strict-aliasing $DEBUG_PREFIX_CFLAGS"
     LDFLAGS_CXX_PARTIAL_LINKING="$MACHINE_FLAG -r"
 
     if test "x$OPENJDK_TARGET_OS" = xlinux; then

make/autoconf/hotspot.m4

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2025, 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

make/autoconf/lib-bundled.m4

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2025, 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

make/autoconf/lib-tests.m4

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2018, 2025, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2018, 2026, 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
@@ -28,7 +28,7 @@
 ################################################################################
 
 # Minimum supported versions
-JTREG_MINIMUM_VERSION=8.1
+JTREG_MINIMUM_VERSION=8.2.1
 GTEST_MINIMUM_VERSION=1.14.0
 
 ################################################################################

make/autoconf/libraries.m4

@@ -42,12 +42,12 @@ m4_include([lib-tests.m4])
 AC_DEFUN_ONCE([LIB_DETERMINE_DEPENDENCIES],
 [
   # Check if X11 is needed
-  if test "x$OPENJDK_TARGET_OS" = xwindows || test "x$OPENJDK_TARGET_OS" = xmacosx; then
-    # No X11 support on windows or macosx
+  if test "x$OPENJDK_TARGET_OS" = xwindows ||
+     test "x$OPENJDK_TARGET_OS" = xmacosx ||
+     test "x$ENABLE_HEADLESS_ONLY" = xtrue; then
     NEEDS_LIB_X11=false
   else
-    # All other instances need X11, even if building headless only, libawt still
-    # needs X11 headers.
+    # All other instances need X11 for libawt.
     NEEDS_LIB_X11=true
   fi
 

make/autoconf/platform.m4

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2025, 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

make/conf/github-actions.conf

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2020, 2026, 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
@@ -26,7 +26,7 @@
 # Versions and download locations for dependencies used by GitHub Actions (GHA)
 
 GTEST_VERSION=1.14.0
-JTREG_VERSION=8.1+1
+JTREG_VERSION=8.2.1+1
 
 LINUX_X64_BOOT_JDK_EXT=tar.gz
 LINUX_X64_BOOT_JDK_URL=https://download.java.net/java/GA/jdk25/bd75d5f9689641da8e1daabeccb5528b/36/GPL/openjdk-25_linux-x64_bin.tar.gz

make/conf/jib-profiles.js

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2026, 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
@@ -1174,9 +1174,9 @@ var getJibProfilesDependencies = function (input, common) {
         jtreg: {
             server: "jpg",
             product: "jtreg",
-            version: "8.1",
+            version: "8.2.1",
             build_number: "1",
-            file: "bundles/jtreg-8.1+1.zip",
+            file: "bundles/jtreg-8.2.1+1.zip",
             environment_name: "JT_HOME",
             environment_path: input.get("jtreg", "home_path") + "/bin",
             configure_args: "--with-jtreg=" + input.get("jtreg", "home_path"),
@@ -1192,8 +1192,8 @@ var getJibProfilesDependencies = function (input, common) {
             server: "jpg",
             product: "jcov",
             version: "3.0",
-            build_number: "3",
-            file: "bundles/jcov-3.0+3.zip",
+            build_number: "5",
+            file: "bundles/jcov-3.0+5.zip",
             environment_name: "JCOV_HOME",
         },
 

make/conf/version-numbers.conf

@@ -26,17 +26,17 @@
 # Default version, product, and vendor information to use,
 # unless overridden by configure
 
-DEFAULT_VERSION_FEATURE=26
+DEFAULT_VERSION_FEATURE=27
 DEFAULT_VERSION_INTERIM=0
 DEFAULT_VERSION_UPDATE=0
 DEFAULT_VERSION_PATCH=0
 DEFAULT_VERSION_EXTRA1=0
 DEFAULT_VERSION_EXTRA2=0
 DEFAULT_VERSION_EXTRA3=0
-DEFAULT_VERSION_DATE=2026-03-17
-DEFAULT_VERSION_CLASSFILE_MAJOR=70  # "`$EXPR $DEFAULT_VERSION_FEATURE + 44`"
+DEFAULT_VERSION_DATE=2026-09-15
+DEFAULT_VERSION_CLASSFILE_MAJOR=71  # "`$EXPR $DEFAULT_VERSION_FEATURE + 44`"
 DEFAULT_VERSION_CLASSFILE_MINOR=0
 DEFAULT_VERSION_DOCS_API_SINCE=11
-DEFAULT_ACCEPTABLE_BOOT_VERSIONS="25 26"
-DEFAULT_JDK_SOURCE_TARGET_VERSION=26
-DEFAULT_PROMOTED_VERSION_PRE=
+DEFAULT_ACCEPTABLE_BOOT_VERSIONS="25 26 27"
+DEFAULT_JDK_SOURCE_TARGET_VERSION=27
+DEFAULT_PROMOTED_VERSION_PRE=ea

make/devkit/createWindowsDevkit.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2015, 2025, 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

make/hotspot/lib/CompileGtest.gmk

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2016, 2025, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2016, 2026, 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
@@ -61,7 +61,8 @@ $(eval $(call SetupJdkLibrary, BUILD_GTEST_LIBGTEST, \
     INCLUDE_FILES := gtest-all.cc gmock-all.cc, \
     DISABLED_WARNINGS_gcc := format-nonliteral maybe-uninitialized undef \
         unused-result zero-as-null-pointer-constant, \
-    DISABLED_WARNINGS_clang := format-nonliteral undef unused-result, \
+    DISABLED_WARNINGS_clang := format-nonliteral undef unused-result \
+        zero-as-null-pointer-constant, \
     DISABLED_WARNINGS_microsoft := 4530, \
     DEFAULT_CFLAGS := false, \
     CFLAGS := $(JVM_CFLAGS) \

make/jdk/src/classes/build/tools/cldrconverter/CLDRConverter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2026, 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
@@ -293,8 +293,10 @@ public class CLDRConverter {
         bundleGenerator = new ResourceBundleGenerator();
 
         // Parse data independent of locales
-        parseSupplemental();
+        // parseBCP47() must precede parseSupplemental(). The latter depends
+        // on IANA alias map, which is produced by the former.
         parseBCP47();
+        parseSupplemental();
 
         // rules maps
         pluralRules = generateRules(handlerPlurals);
@@ -536,6 +538,12 @@ public class CLDRConverter {
 
         // canonical tz name map
         // alias -> primary
+        //
+        // Note that CLDR meta zones do not necessarily align with IANA's
+        // current time zone identifiers. For example, the CLDR "India"
+        // meta zone maps to "Asia/Calcutta", whereas IANA now uses
+        // "Asia/Kolkata" for the zone. Accordingly, "canonical" here is
+        // defined in terms of CLDR's zone mappings.
         handlerTimeZone.getData().forEach((k, v) -> {
             String[] ids = ((String)v).split("\\s");
             for (int i = 1; i < ids.length; i++) {

make/jdk/src/classes/build/tools/cldrconverter/TimeZoneParseHandler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2026, 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
@@ -27,6 +27,9 @@ package build.tools.cldrconverter;
 
 import java.io.File;
 import java.io.IOException;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
 
 import org.xml.sax.Attributes;
 import org.xml.sax.InputSource;
@@ -40,6 +43,10 @@ import org.xml.sax.SAXException;
 class TimeZoneParseHandler extends AbstractLDMLHandler<Object> {
     private static final String PREF_PREFIX = "preferred:";
 
+    // CLDR aliases to IANA ids map. The initial capacity is estimated
+    // from the number of aliases in timezone.xml as of CLDR v48
+    private final Map<String, String> ianaAliasMap = HashMap.newHashMap(32);
+
     @Override
     public InputSource resolveEntity(String publicID, String systemID) throws IOException, SAXException {
         // avoid HTTP traffic to unicode.org
@@ -61,7 +68,16 @@ class TimeZoneParseHandler extends AbstractLDMLHandler<Object> {
                         put(attributes.getValue("name"), PREF_PREFIX + preferred);
                     }
                 } else {
-                    put(attributes.getValue("name"), attributes.getValue("alias"));
+                    var alias = attributes.getValue("alias");
+                    var iana = attributes.getValue("iana");
+                    if (iana != null) {
+                        for (var a : alias.split("\\s+")) {
+                            if (!a.equals(iana)) {
+                                ianaAliasMap.put(a, iana);
+                            }
+                        }
+                    }
+                    put(attributes.getValue("name"), alias);
                 }
             }
             break;
@@ -80,4 +96,8 @@ class TimeZoneParseHandler extends AbstractLDMLHandler<Object> {
             .forEach(e -> map.put(e.getKey(),
                 map.get(e.getValue().toString().substring(PREF_PREFIX.length()))));
     }
+
+    Map<String, String> getIanaAliasMap() {
+        return ianaAliasMap;
+    }
 }

make/jdk/src/classes/build/tools/cldrconverter/WinZonesParseHandler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2026, 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
@@ -56,6 +56,7 @@ class WinZonesParseHandler extends AbstractLDMLHandler<Object> {
             String zoneName = attributes.getValue("other");
             String territory = attributes.getValue("territory");
             String javatz = attributes.getValue("type").replaceFirst("\\s.*", "");
+            javatz = CLDRConverter.handlerTimeZone.getIanaAliasMap().getOrDefault(javatz, javatz);
             put(zoneName + ":" + territory, javatz);
             pushIgnoredContainer(qName);
             break;

make/jdk/src/classes/build/tools/pandocfilter/PandocFilter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2025, 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

make/jdk/src/classes/build/tools/taglet/JSpec.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2026, 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
@@ -49,13 +49,15 @@ import static com.sun.source.doctree.DocTree.Kind.*;
  * The tags can be used as follows:
  *
  * <pre>
- * &commat;jls section-number description
+ * &commat;jls chapter.section description
+ * &commat;jls preview-feature-chapter.section description
  * </pre>
  *
  * For example:
  *
  * <pre>
  * &commat;jls 3.4 Line Terminators
+ * &commat;jls primitive-types-in-patterns-instanceof-switch-5.7.1 Exact Testing Conversions
  * </pre>
  *
  * will produce the following HTML, depending on the file containing
@@ -64,10 +66,24 @@ import static com.sun.source.doctree.DocTree.Kind.*;
  * <pre>{@code
  * <dt>See <i>Java Language Specification</i>:
  * <dd><a href="../../specs/jls/jls-3.html#jls-3.4">3.4 Line terminators</a>
+ * <dd><a href="../../specs/primitive-types-in-patterns-instanceof-switch-jls.html#jls-5.7.1">
+ * 5.7.1 Exact Testing Conversions</a><sup class="preview-mark">
+ * <a href="../../specs/jls/jls-1.html#jls-1.5.1">PREVIEW</a></sup>
  * }</pre>
  *
- * Copies of JLS and JVMS are expected to have been placed in the {@code specs}
- * folder. These documents are not included in open-source repositories.
+ * In inline tags (note you need manual JLS/JVMS prefix):
+ * <pre>
+ * JLS {&commat;jls 3.4}
+ * </pre>
+ *
+ * produces (note the section sign and no trailing dot):
+ * <pre>
+ * JLS <a href="../../specs/jls/jls-3.html#jls-3.4">§3.4</a>
+ * </pre>
+ *
+ * Copies of JLS, JVMS, and preview JLS and JVMS changes are expected to have
+ * been placed in the {@code specs} folder. These documents are not included
+ * in open-source repositories.
  */
 public class JSpec implements Taglet  {
 
@@ -87,9 +103,9 @@ public class JSpec implements Taglet  {
         }
     }
 
-    private String tagName;
-    private String specTitle;
-    private String idPrefix;
+    private final String tagName;
+    private final String specTitle;
+    private final String idPrefix;
 
     JSpec(String tagName, String specTitle, String idPrefix) {
         this.tagName = tagName;
@@ -98,7 +114,7 @@ public class JSpec implements Taglet  {
     }
 
     // Note: Matches special cases like @jvms 6.5.checkcast
-    private static final Pattern TAG_PATTERN = Pattern.compile("(?s)(.+ )?(?<chapter>[1-9][0-9]*)(?<section>[0-9a-z_.]*)( .*)?$");
+    private static final Pattern TAG_PATTERN = Pattern.compile("(?s)(.+ )?(?<preview>([a-z0-9]+-)+)?(?<chapter>[1-9][0-9]*)(?<section>[0-9a-z_.]*)( .*)?$");
 
     /**
      * Returns the set of locations in which the tag may be used.
@@ -157,19 +173,50 @@ public class JSpec implements Taglet  {
                     .trim();
             Matcher m = TAG_PATTERN.matcher(tagText);
             if (m.find()) {
+                // preview-feature-4.6 is preview-feature-, 4, .6
+                String preview = m.group("preview"); // null if no preview feature
                 String chapter = m.group("chapter");
                 String section = m.group("section");
                 String rootParent = currentPath().replaceAll("[^/]+", "..");
 
-                String url = String.format("%1$s/specs/%2$s/%2$s-%3$s.html#%2$s-%3$s%4$s",
-                        rootParent, idPrefix, chapter, section);
+                String url = preview == null ?
+                        String.format("%1$s/specs/%2$s/%2$s-%3$s.html#%2$s-%3$s%4$s",
+                                rootParent, idPrefix, chapter, section) :
+                        String.format("%1$s/specs/%5$s%2$s.html#%2$s-%3$s%4$s",
+                                rootParent, idPrefix, chapter, section, preview);
+
+                var literal = expand(contents).trim();
+                var prefix = (preview == null ? "" : preview) + chapter + section;
+                if (literal.startsWith(prefix)) {
+                    var hasFullTitle = literal.length() > prefix.length();
+                    if (hasFullTitle) {
+                        // Drop the preview identifier
+                        literal = chapter + section + literal.substring(prefix.length());
+                    } else {
+                        // No section sign if the tag refers to a chapter, like {@jvms 4}
+                        String sectionSign = section.isEmpty() ? "" : "§";
+                        // Change whole text to "§chapter.x" in inline tags.
+                        literal = sectionSign + chapter + section;
+                    }
+                }
 
                 sb.append("<a href=\"")
                         .append(url)
                         .append("\">")
-                        .append(expand(contents))
+                        .append(literal)
                         .append("</a>");
 
+                if (preview != null) {
+                    // Add PREVIEW superscript that links to JLS/JVMS 1.5.1
+                    // "Restrictions on the Use of Preview Features"
+                    // Similar to how APIs link to the Preview info box warning
+                    var sectionLink = String.format("%1$s/specs/%2$s/%2$s-%3$s.html#%2$s-%3$s%4$s",
+                            rootParent, idPrefix, "1", ".5.1");
+                    sb.append("<sup class=\"preview-mark\"><a href=\"")
+                            .append(sectionLink)
+                            .append("\">PREVIEW</a></sup>");
+                }
+
                 if (tag.getKind() == DocTree.Kind.UNKNOWN_BLOCK_TAG) {
                     sb.append("<br>");
                 }

make/jdk/src/classes/build/tools/taglet/ToolGuide.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2025, 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

make/langtools/tools/propertiesparser/gen/ClassGenerator.java

@@ -286,7 +286,7 @@ public class ClassGenerator {
                         diagnosticFlags.isEmpty() ?
                           StubKind.DIAGNOSTIC_FLAGS_EMPTY.format() :
                           StubKind.DIAGNOSTIC_FLAGS_NON_EMPTY.format(diagnosticFlags),
-                        StubKind.LINT_CATEGORY.format("\"" + lintCategory + "\""),
+                        StubKind.LINT_CATEGORY.format(toLintFieldName(lintCategory)),
                         "\"" + keyParts[0] + "\"",
                         "\"" + Stream.of(keyParts).skip(2).collect(Collectors.joining(".")) + "\"",
                         javadoc);
@@ -314,7 +314,7 @@ public class ClassGenerator {
                             diagnosticFlags.isEmpty() ?
                               StubKind.DIAGNOSTIC_FLAGS_EMPTY.format() :
                               StubKind.DIAGNOSTIC_FLAGS_NON_EMPTY.format(diagnosticFlags),
-                            StubKind.LINT_CATEGORY.format("\"" + lintCategory + "\""),
+                            StubKind.LINT_CATEGORY.format(toLintFieldName(lintCategory)),
                             "\"" + keyParts[0] + "\"",
                             "\"" + Stream.of(keyParts).skip(2).collect(Collectors.joining(".")) + "\"",
                             argNames.stream().collect(Collectors.joining(", ")));
@@ -329,6 +329,11 @@ public class ClassGenerator {
         }
     }
 
+    String toLintFieldName(String lintCategory) {
+        return lintCategory.toUpperCase()
+                .replaceAll("-", "_");
+    }
+
     /**
      * Form the name of a factory method/field given a resource key.
      */

make/langtools/tools/propertiesparser/parser/Message.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2025, 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

make/langtools/tools/propertiesparser/resources/templates.properties

@@ -87,7 +87,7 @@ suppress.warnings=\
   @SuppressWarnings("rawtypes")\n
 
 lint.category=\
-  LintCategory.get({0}).get()
+  LintCategory.{0}
 
 diagnostic.flags.empty=\
   EnumSet.noneOf(DiagnosticFlag.class)

make/modules/java.desktop/lib/AwtLibraries.gmk

@@ -88,6 +88,10 @@ LIBAWT_EXTRA_HEADER_DIRS := \
 
 LIBAWT_CFLAGS := -D__MEDIALIB_OLD_NAMES -D__USE_J2D_NAMES -DMLIB_NO_LIBSUNMATH
 
+ifeq ($(ENABLE_HEADLESS_ONLY), true)
+  LIBAWT_CFLAGS += -DHEADLESS
+endif
+
 ifeq ($(call isTargetOs, windows), true)
   LIBAWT_CFLAGS += -EHsc -DUNICODE -D_UNICODE -DMLIB_OS64BIT
   LIBAWT_RCFLAGS ?= -I$(TOPDIR)/src/java.base/windows/native/launcher/icons
@@ -167,11 +171,18 @@ ifeq ($(call isTargetOs, windows macosx), false)
       $(TOPDIR)/src/$(MODULE)/$(OPENJDK_TARGET_OS_TYPE)/native/common/awt \
       #
 
+  LIBAWT_HEADLESS_EXCLUDE_FILES := \
+      GLXGraphicsConfig.c \
+      GLXSurfaceData.c \
+      X11PMBlitLoops.c \
+      X11Renderer.c \
+      X11SurfaceData.c \
+      #
+
   LIBAWT_HEADLESS_EXTRA_HEADER_DIRS := \
       $(LIBAWT_DEFAULT_HEADER_DIRS) \
       common/awt/debug \
       common/font \
-      common/java2d/opengl \
       java.base:libjvm \
       #
 
@@ -191,7 +202,8 @@ ifeq ($(call isTargetOs, windows macosx), false)
   $(eval $(call SetupJdkLibrary, BUILD_LIBAWT_HEADLESS, \
       NAME := awt_headless, \
       EXTRA_SRC := $(LIBAWT_HEADLESS_EXTRA_SRC), \
-      EXCLUDES := medialib, \
+      EXCLUDES := medialib opengl, \
+      EXCLUDE_FILES := $(LIBAWT_HEADLESS_EXCLUDE_FILES), \
       ONLY_EXPORTED := $(LIBAWT_HEADLESS_ONLY_EXPORTED), \
       OPTIMIZATION := LOW, \
       CFLAGS := -DHEADLESS=true $(CUPS_CFLAGS) $(FONTCONFIG_CFLAGS) \

make/modules/java.desktop/lib/ClientLibraries.gmk

@@ -164,7 +164,7 @@ ifeq ($(ENABLE_HEADLESS_ONLY), false)
 
   ifeq ($(USE_EXTERNAL_LIBPNG), false)
     LIBSPLASHSCREEN_HEADER_DIRS += libsplashscreen/libpng
-    LIBSPLASHSCREEN_CFLAGS += -DPNG_NO_MMX_CODE -DPNG_ARM_NEON_OPT=0
+    LIBSPLASHSCREEN_CFLAGS += -DPNG_NO_MMX_CODE -DPNG_ARM_NEON_OPT=0 \
       -DPNG_ARM_NEON_IMPLEMENTATION=0 -DPNG_LOONGARCH_LSX_OPT=0
 
     ifeq ($(call isTargetOs, linux)+$(call isTargetCpuArch, ppc), true+true)

make/modules/jdk.jdwp.agent/Lib.gmk

@@ -54,21 +54,6 @@ $(eval $(call SetupJdkLibrary, BUILD_LIBJDWP, \
     NAME := jdwp, \
     OPTIMIZATION := LOW, \
     CFLAGS := -DJDWP_LOGGING $(ICONV_CFLAGS), \
-    DISABLED_WARNINGS_gcc_eventFilter.c := unused-variable, \
-    DISABLED_WARNINGS_gcc_SDE.c := unused-function, \
-    DISABLED_WARNINGS_gcc_threadControl.c := unused-but-set-variable \
-        unused-variable, \
-    DISABLED_WARNINGS_gcc_utf_util.c := unused-but-set-variable, \
-    DISABLED_WARNINGS_clang_error_messages.c := format-nonliteral, \
-    DISABLED_WARNINGS_clang_eventFilter.c := unused-variable, \
-    DISABLED_WARNINGS_clang_EventRequestImpl.c := self-assign, \
-    DISABLED_WARNINGS_clang_inStream.c := sometimes-uninitialized, \
-    DISABLED_WARNINGS_clang_log_messages.c := format-nonliteral, \
-    DISABLED_WARNINGS_clang_SDE.c := unused-function, \
-    DISABLED_WARNINGS_clang_threadControl.c := unused-but-set-variable \
-        unused-variable, \
-    DISABLED_WARNINGS_clang_utf_util.c := unused-but-set-variable, \
-    DISABLED_WARNINGS_microsoft_debugInit.c := 5287, \
     LDFLAGS := $(ICONV_LDFLAGS), \
     EXTRA_HEADER_DIRS := \
         include \

make/modules/jdk.jpackage/Lib.gmk

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2018, 2025, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2018, 2026, 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
@@ -54,7 +54,7 @@ $(eval $(call SetupJdkExecutable, BUILD_JPACKAGEAPPLAUNCHER, \
     SRC := applauncher, \
     EXTRA_SRC := common, \
     INCLUDE_FILES := $(JPACKAGEAPPLAUNCHER_INCLUDE_FILES), \
-    OPTIMIZATION := LOW, \
+    OPTIMIZATION := SIZE, \
     DISABLED_WARNINGS_clang_JvmLauncherLib.c := format-nonliteral, \
     DISABLED_WARNINGS_clang_LinuxPackage.c := format-nonliteral, \
     DISABLED_WARNINGS_clang_Log.cpp := unused-const-variable, \
@@ -91,7 +91,7 @@ ifeq ($(call isTargetOs, linux), true)
           common, \
       EXCLUDE_FILES := LinuxLauncher.c LinuxPackage.c, \
       LINK_TYPE := C++, \
-      OPTIMIZATION := LOW, \
+      OPTIMIZATION := SIZE, \
       DISABLED_WARNINGS_gcc_Log.cpp := unused-const-variable, \
       DISABLED_WARNINGS_clang_JvmLauncherLib.c := format-nonliteral, \
       DISABLED_WARNINGS_clang_tstrings.cpp := format-nonliteral, \

make/modules/jdk.security.auth/Lib.gmk

@@ -31,13 +31,14 @@ include LibCommon.gmk
 ## Build libjaas
 ################################################################################
 
-$(eval $(call SetupJdkLibrary, BUILD_LIBJAAS, \
-    NAME := jaas, \
-    OPTIMIZATION := LOW, \
-    EXTRA_HEADER_DIRS := java.base:libjava, \
-    LIBS_windows := advapi32.lib mpr.lib netapi32.lib user32.lib, \
-))
-
-TARGETS += $(BUILD_LIBJAAS)
+ifeq ($(call isTargetOs, windows), true)
+  $(eval $(call SetupJdkLibrary, BUILD_LIBJAAS, \
+      NAME := jaas, \
+      OPTIMIZATION := LOW, \
+      EXTRA_HEADER_DIRS := java.base:libjava, \
+      LIBS_windows := advapi32.lib mpr.lib netapi32.lib user32.lib, \
+  ))
 
+  TARGETS += $(BUILD_LIBJAAS)
+endif
 ################################################################################

make/scripts/compare-logger.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2012, 2025, 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

make/scripts/compare.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# Copyright (c) 2012, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2012, 2025, 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

src/demo/share/java2d/J2DBench/Makefile

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2002, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2002, 2025, Oracle and/or its affiliates. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions

src/demo/share/java2d/J2DBench/build.xml

@@ -1,5 +1,5 @@
 <!--
- Copyright (c) 2005, 2024, Oracle and/or its affiliates. All rights reserved.
+ Copyright (c) 2005, 2025, Oracle and/or its affiliates. All rights reserved.
 
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions

src/demo/share/java2d/J2DBench/src/j2dbench/report/J2DAnalyzer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2025, Oracle and/or its affiliates. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions

src/demo/share/jfc/CodePointIM/com/sun/inputmethods/internal/codepointim/CodePointInputMethodDescriptor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2025, Oracle and/or its affiliates. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions

src/demo/share/jfc/J2Ddemo/java2d/RunWindow.java

@@ -1,6 +1,6 @@
 /*
  *
- * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2025, Oracle and/or its affiliates. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions

src/demo/share/jfc/J2Ddemo/java2d/Tools.java

@@ -1,6 +1,6 @@
 /*
  *
- * Copyright (c) 2007, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2025, Oracle and/or its affiliates. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions

src/demo/share/jfc/Stylepad/HelloWorld.java

@@ -1,6 +1,6 @@
 /*
  *
- * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2025, Oracle and/or its affiliates. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions

src/demo/share/jfc/SwingSet2/SwingSet2.java

@@ -1,6 +1,6 @@
 /*
  *
- * Copyright (c) 2007, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2025, Oracle and/or its affiliates. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions

src/demo/share/jfc/SwingSet2/resources/swingset_de.properties

@@ -1,4 +1,4 @@
-# Copyright (c) 2010, 2022, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2010, 2025, Oracle and/or its affiliates. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions

src/demo/share/jfc/TableExample/OldJTable.java

@@ -1,264 +0,0 @@
-/*
- * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- *   - Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- *
- *   - Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in the
- *     documentation and/or other materials provided with the distribution.
- *
- *   - Neither the name of Oracle nor the names of its
- *     contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * This source code is provided to illustrate the usage of a given feature
- * or technique and has been deliberately simplified. Additional steps
- * required for a production-quality application, such as security checks,
- * input validation and proper error handling, might not be present in
- * this sample code.
- */
-
-
-
-import java.util.EventObject;
-import java.util.List;
-import javax.swing.JTable;
-import javax.swing.table.DefaultTableModel;
-import javax.swing.table.TableCellEditor;
-import javax.swing.table.TableCellRenderer;
-import javax.swing.table.TableColumn;
-
-
-/**
- *  The OldJTable is an unsupported class containing some methods that were
- *  deleted from the JTable between releases 0.6 and 0.7
- */
-@SuppressWarnings("serial")
-public class OldJTable extends JTable
-{
-   /*
-    *  A new convenience method returning the index of the column in the
-    *  co-ordinate space of the view.
-    */
-    public int getColumnIndex(Object identifier) {
-        return getColumnModel().getColumnIndex(identifier);
-    }
-
-//
-//  Methods deleted from the JTable because they only work with the
-//  DefaultTableModel.
-//
-
-    public TableColumn addColumn(Object columnIdentifier, int width) {
-        return addColumn(columnIdentifier, width, null, null, null);
-    }
-
-    public TableColumn addColumn(Object columnIdentifier, List<?> columnData) {
-        return addColumn(columnIdentifier, -1, null, null, columnData);
-    }
-
-    // Override the new JTable implementation - it will not add a column to the
-    // DefaultTableModel.
-    public TableColumn addColumn(Object columnIdentifier, int width,
-                                 TableCellRenderer renderer,
-                                 TableCellEditor editor) {
-        return addColumn(columnIdentifier, width, renderer, editor, null);
-    }
-
-    public TableColumn addColumn(Object columnIdentifier, int width,
-                                 TableCellRenderer renderer,
-                                 TableCellEditor editor, List<?> columnData) {
-        checkDefaultTableModel();
-
-        // Set up the model side first
-        DefaultTableModel m = (DefaultTableModel)getModel();
-        m.addColumn(columnIdentifier, columnData.toArray());
-
-        // The column will have been added to the end, so the index of the
-        // column in the model is the last element.
-        TableColumn newColumn = new TableColumn(
-                m.getColumnCount()-1, width, renderer, editor);
-        super.addColumn(newColumn);
-        return newColumn;
-    }
-
-    // Not possilble to make this work the same way ... change it so that
-    // it does not delete columns from the model.
-    public void removeColumn(Object columnIdentifier) {
-        super.removeColumn(getColumn(columnIdentifier));
-    }
-
-    public void addRow(Object[] rowData) {
-        checkDefaultTableModel();
-        ((DefaultTableModel)getModel()).addRow(rowData);
-    }
-
-    public void addRow(List<?> rowData) {
-        checkDefaultTableModel();
-        ((DefaultTableModel)getModel()).addRow(rowData.toArray());
-    }
-
-    public void removeRow(int rowIndex) {
-        checkDefaultTableModel();
-        ((DefaultTableModel)getModel()).removeRow(rowIndex);
-    }
-
-    public void moveRow(int startIndex, int endIndex, int toIndex) {
-        checkDefaultTableModel();
-        ((DefaultTableModel)getModel()).moveRow(startIndex, endIndex, toIndex);
-    }
-
-    public void insertRow(int rowIndex, Object[] rowData) {
-        checkDefaultTableModel();
-        ((DefaultTableModel)getModel()).insertRow(rowIndex, rowData);
-    }
-
-    public void insertRow(int rowIndex, List<?> rowData) {
-        checkDefaultTableModel();
-        ((DefaultTableModel)getModel()).insertRow(rowIndex, rowData.toArray());
-    }
-
-    public void setNumRows(int newSize) {
-        checkDefaultTableModel();
-        ((DefaultTableModel)getModel()).setNumRows(newSize);
-    }
-
-    public void setDataVector(Object[][] newData, List<?> columnIds) {
-        checkDefaultTableModel();
-        ((DefaultTableModel)getModel()).setDataVector(
-                newData, columnIds.toArray());
-    }
-
-    public void setDataVector(Object[][] newData, Object[] columnIds) {
-        checkDefaultTableModel();
-        ((DefaultTableModel)getModel()).setDataVector(newData, columnIds);
-    }
-
-    protected void checkDefaultTableModel() {
-        if(!(dataModel instanceof DefaultTableModel))
-            throw new InternalError("In order to use this method, the data model must be an instance of DefaultTableModel.");
-    }
-
-//
-//  Methods removed from JTable in the move from identifiers to ints.
-//
-
-    public Object getValueAt(Object columnIdentifier, int rowIndex) {
-        return super.getValueAt(rowIndex, getColumnIndex(columnIdentifier));
-    }
-
-    public boolean isCellEditable(Object columnIdentifier, int rowIndex) {
-        return super.isCellEditable(rowIndex, getColumnIndex(columnIdentifier));
-    }
-
-    public void setValueAt(Object aValue, Object columnIdentifier, int rowIndex) {
-        super.setValueAt(aValue, rowIndex, getColumnIndex(columnIdentifier));
-    }
-
-    public boolean editColumnRow(Object identifier, int row) {
-        return super.editCellAt(row, getColumnIndex(identifier));
-    }
-
-    public void moveColumn(Object columnIdentifier, Object targetColumnIdentifier) {
-        moveColumn(getColumnIndex(columnIdentifier),
-                   getColumnIndex(targetColumnIdentifier));
-    }
-
-    public boolean isColumnSelected(Object identifier) {
-        return isColumnSelected(getColumnIndex(identifier));
-    }
-
-    public TableColumn addColumn(int modelColumn, int width) {
-        return addColumn(modelColumn, width, null, null);
-    }
-
-    public TableColumn addColumn(int modelColumn) {
-        return addColumn(modelColumn, 75, null, null);
-    }
-
-    /**
-     *  Creates a new column with <I>modelColumn</I>, <I>width</I>,
-     *  <I>renderer</I>, and <I>editor</I> and adds it to the end of
-     *  the JTable's array of columns. This method also retrieves the
-     *  name of the column using the model's <I>getColumnName(modelColumn)</I>
-     *  method, and sets the both the header value and the identifier
-     *  for this TableColumn accordingly.
-     *  <p>
-     *  The <I>modelColumn</I> is the index of the column in the model which
-     *  will supply the data for this column in the table. This, like the
-     *  <I>columnIdentifier</I> in previous releases, does not change as the
-     *  columns are moved in the view.
-     *  <p>
-     *  For the rest of the JTable API, and all of its associated classes,
-     *  columns are referred to in the co-ordinate system of the view, the
-     *  index of the column in the model is kept inside the TableColumn
-     *  and is used only to retrieve the information from the appropraite
-     *  column in the model.
-     *  <p>
-     *
-     *  @param  modelColumn     The index of the column in the model
-     *  @param  width           The new column's width.  Or -1 to use
-     *                          the default width
-     *  @param  renderer        The renderer used with the new column.
-     *                          Or null to use the default renderer.
-     *  @param  editor          The editor used with the new column.
-     *                          Or null to use the default editor.
-     */
-    public TableColumn addColumn(int modelColumn, int width,
-                                 TableCellRenderer renderer,
-                                 TableCellEditor editor) {
-        TableColumn newColumn = new TableColumn(
-                modelColumn, width, renderer, editor);
-        addColumn(newColumn);
-        return newColumn;
-    }
-
-//
-//  Methods that had their arguments switched.
-//
-
-// These won't work with the new table package.
-
-/*
-    public Object getValueAt(int columnIndex, int rowIndex) {
-        return super.getValueAt(rowIndex, columnIndex);
-    }
-
-    public boolean isCellEditable(int columnIndex, int rowIndex) {
-        return super.isCellEditable(rowIndex, columnIndex);
-    }
-
-    public void setValueAt(Object aValue, int columnIndex, int rowIndex) {
-        super.setValueAt(aValue, rowIndex, columnIndex);
-    }
-*/
-
-    public boolean editColumnRow(int columnIndex, int rowIndex) {
-        return super.editCellAt(rowIndex, columnIndex);
-    }
-
-    public boolean editColumnRow(int columnIndex, int rowIndex, EventObject e){
-        return super.editCellAt(rowIndex, columnIndex, e);
-    }
-
-
-}  // End Of Class OldJTable

src/hotspot/cpu/aarch64/aarch64.ad

@@ -1229,7 +1229,7 @@ public:
   // predicate controlling addressing modes
   bool size_fits_all_mem_uses(AddPNode* addp, int shift);
 
-  // Convert BootTest condition to Assembler condition.
+  // Convert BoolTest condition to Assembler condition.
   // Replicate the logic of cmpOpOper::ccode() and cmpOpUOper::ccode().
   Assembler::Condition to_assembler_cond(BoolTest::mask cond);
 %}
@@ -2579,7 +2579,7 @@ bool size_fits_all_mem_uses(AddPNode* addp, int shift) {
   return true;
 }
 
-// Convert BootTest condition to Assembler condition.
+// Convert BoolTest condition to Assembler condition.
 // Replicate the logic of cmpOpOper::ccode() and cmpOpUOper::ccode().
 Assembler::Condition to_assembler_cond(BoolTest::mask cond) {
   Assembler::Condition result;

src/hotspot/cpu/aarch64/aarch64_vector.ad

@@ -1,5 +1,5 @@
 //
-// Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
+// Copyright (c) 2020, 2026, Oracle and/or its affiliates. All rights reserved.
 // Copyright (c) 2020, 2025, Arm Limited. All rights reserved.
 // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 //
@@ -201,6 +201,8 @@ source %{
       case Op_XorReductionV:
       case Op_MinReductionV:
       case Op_MaxReductionV:
+      case Op_UMinReductionV:
+      case Op_UMaxReductionV:
         // Reductions with less than 8 bytes vector length are
         // not supported.
         if (length_in_bytes < 8) {
@@ -383,6 +385,8 @@ source %{
         return !VM_Version::use_neon_for_vector(length_in_bytes);
       case Op_MinReductionV:
       case Op_MaxReductionV:
+      case Op_UMinReductionV:
+      case Op_UMaxReductionV:
         // For BYTE/SHORT/INT/FLOAT/DOUBLE types, we prefer using NEON
         // instructions rather than SVE predicated instructions for
         // better performance.
@@ -4218,6 +4222,224 @@ instruct reduce_minD_masked(vRegD dst, vRegD dsrc, vReg vsrc, pRegGov pg) %{
   ins_pipe(pipe_slow);
 %}
 
+// -------------------- Vector reduction unsigned min/max ----------------------
+
+// reduction uminI
+
+instruct reduce_uminI_neon(iRegINoSp dst, iRegIorL2I isrc, vReg vsrc,
+                          vReg tmp, rFlagsReg cr) %{
+  predicate(VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n->in(2))) &&
+            (Matcher::vector_element_basic_type(n->in(2)) == T_BYTE ||
+             Matcher::vector_element_basic_type(n->in(2)) == T_SHORT ||
+             Matcher::vector_element_basic_type(n->in(2)) == T_INT));
+  match(Set dst (UMinReductionV isrc vsrc));
+  effect(TEMP_DEF dst, TEMP tmp, KILL cr);
+  format %{ "reduce_uminI_neon $dst, $isrc, $vsrc\t# KILL $tmp, cr" %}
+  ins_encode %{
+    BasicType bt = Matcher::vector_element_basic_type(this, $vsrc);
+    uint length_in_bytes = Matcher::vector_length_in_bytes(this, $vsrc);
+    __ neon_reduce_minmax_integral(this->ideal_Opcode(), $dst$$Register, bt,
+                                   $isrc$$Register, $vsrc$$FloatRegister,
+                                   length_in_bytes, $tmp$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
+instruct reduce_uminI_sve(iRegINoSp dst, iRegIorL2I isrc, vReg vsrc,
+                         vRegD tmp, rFlagsReg cr) %{
+  predicate(!VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n->in(2))) &&
+            (Matcher::vector_element_basic_type(n->in(2)) == T_BYTE ||
+             Matcher::vector_element_basic_type(n->in(2)) == T_SHORT ||
+             Matcher::vector_element_basic_type(n->in(2)) == T_INT));
+  match(Set dst (UMinReductionV isrc vsrc));
+  effect(TEMP_DEF dst, TEMP tmp, KILL cr);
+  format %{ "reduce_uminI_sve $dst, $isrc, $vsrc\t# KILL $tmp, cr" %}
+  ins_encode %{
+    assert(UseSVE > 0, "must be sve");
+    BasicType bt = Matcher::vector_element_basic_type(this, $vsrc);
+    uint length_in_bytes = Matcher::vector_length_in_bytes(this, $vsrc);
+    assert(length_in_bytes == MaxVectorSize, "invalid vector length");
+    __ sve_reduce_integral(this->ideal_Opcode(), $dst$$Register, bt,
+                           $isrc$$Register, $vsrc$$FloatRegister,
+                           ptrue, $tmp$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
+// reduction uminL
+
+instruct reduce_uminL_neon(iRegLNoSp dst, iRegL isrc, vReg vsrc, rFlagsReg cr) %{
+  predicate(UseSVE == 0 && Matcher::vector_element_basic_type(n->in(2)) == T_LONG);
+  match(Set dst (UMinReductionV isrc vsrc));
+  effect(TEMP_DEF dst, KILL cr);
+  format %{ "reduce_uminL_neon $dst, $isrc, $vsrc\t# 2L. KILL cr" %}
+  ins_encode %{
+    __ neon_reduce_minmax_integral(this->ideal_Opcode(), $dst$$Register, T_LONG,
+                                   $isrc$$Register, $vsrc$$FloatRegister,
+                                   /* vector_length_in_bytes */ 16, fnoreg);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
+instruct reduce_uminL_sve(iRegLNoSp dst, iRegL isrc, vReg vsrc,
+                         vRegD tmp, rFlagsReg cr) %{
+  predicate(UseSVE > 0 && Matcher::vector_element_basic_type(n->in(2)) == T_LONG);
+  match(Set dst (UMinReductionV isrc vsrc));
+  effect(TEMP_DEF dst, TEMP tmp, KILL cr);
+  format %{ "reduce_uminL_sve $dst, $isrc, $vsrc\t# KILL $tmp, cr" %}
+  ins_encode %{
+    uint length_in_bytes = Matcher::vector_length_in_bytes(this, $vsrc);
+    assert(length_in_bytes == MaxVectorSize, "invalid vector length");
+    __ sve_reduce_integral(this->ideal_Opcode(), $dst$$Register, T_LONG,
+                           $isrc$$Register, $vsrc$$FloatRegister,
+                           ptrue, $tmp$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
+// reduction umin - predicated
+
+instruct reduce_uminI_masked(iRegINoSp dst, iRegIorL2I isrc, vReg vsrc, pRegGov pg,
+                            vRegD tmp, rFlagsReg cr) %{
+  predicate(UseSVE > 0 &&
+            (Matcher::vector_element_basic_type(n->in(1)->in(2)) == T_BYTE ||
+             Matcher::vector_element_basic_type(n->in(1)->in(2)) == T_SHORT ||
+             Matcher::vector_element_basic_type(n->in(1)->in(2)) == T_INT));
+  match(Set dst (UMinReductionV (Binary isrc vsrc) pg));
+  effect(TEMP_DEF dst, TEMP tmp, KILL cr);
+  format %{ "reduce_uminI_masked $dst, $isrc, $pg, $vsrc\t# KILL $tmp, cr" %}
+  ins_encode %{
+    BasicType bt = Matcher::vector_element_basic_type(this, $vsrc);
+    __ sve_reduce_integral(this->ideal_Opcode(), $dst$$Register, bt,
+                           $isrc$$Register, $vsrc$$FloatRegister,
+                           $pg$$PRegister, $tmp$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
+instruct reduce_uminL_masked(iRegLNoSp dst, iRegL isrc, vReg vsrc, pRegGov pg,
+                            vRegD tmp, rFlagsReg cr) %{
+  predicate(UseSVE > 0 && Matcher::vector_element_basic_type(n->in(1)->in(2)) == T_LONG);
+  match(Set dst (UMinReductionV (Binary isrc vsrc) pg));
+  effect(TEMP_DEF dst, TEMP tmp, KILL cr);
+  format %{ "reduce_uminL_masked $dst, $isrc, $pg, $vsrc\t# KILL $tmp, cr" %}
+  ins_encode %{
+    BasicType bt = Matcher::vector_element_basic_type(this, $vsrc);
+    __ sve_reduce_integral(this->ideal_Opcode(), $dst$$Register, bt,
+                           $isrc$$Register, $vsrc$$FloatRegister,
+                           $pg$$PRegister, $tmp$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
+// reduction umaxI
+
+instruct reduce_umaxI_neon(iRegINoSp dst, iRegIorL2I isrc, vReg vsrc,
+                          vReg tmp, rFlagsReg cr) %{
+  predicate(VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n->in(2))) &&
+            (Matcher::vector_element_basic_type(n->in(2)) == T_BYTE ||
+             Matcher::vector_element_basic_type(n->in(2)) == T_SHORT ||
+             Matcher::vector_element_basic_type(n->in(2)) == T_INT));
+  match(Set dst (UMaxReductionV isrc vsrc));
+  effect(TEMP_DEF dst, TEMP tmp, KILL cr);
+  format %{ "reduce_umaxI_neon $dst, $isrc, $vsrc\t# KILL $tmp, cr" %}
+  ins_encode %{
+    BasicType bt = Matcher::vector_element_basic_type(this, $vsrc);
+    uint length_in_bytes = Matcher::vector_length_in_bytes(this, $vsrc);
+    __ neon_reduce_minmax_integral(this->ideal_Opcode(), $dst$$Register, bt,
+                                   $isrc$$Register, $vsrc$$FloatRegister,
+                                   length_in_bytes, $tmp$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
+instruct reduce_umaxI_sve(iRegINoSp dst, iRegIorL2I isrc, vReg vsrc,
+                         vRegD tmp, rFlagsReg cr) %{
+  predicate(!VM_Version::use_neon_for_vector(Matcher::vector_length_in_bytes(n->in(2))) &&
+            (Matcher::vector_element_basic_type(n->in(2)) == T_BYTE ||
+             Matcher::vector_element_basic_type(n->in(2)) == T_SHORT ||
+             Matcher::vector_element_basic_type(n->in(2)) == T_INT));
+  match(Set dst (UMaxReductionV isrc vsrc));
+  effect(TEMP_DEF dst, TEMP tmp, KILL cr);
+  format %{ "reduce_umaxI_sve $dst, $isrc, $vsrc\t# KILL $tmp, cr" %}
+  ins_encode %{
+    assert(UseSVE > 0, "must be sve");
+    BasicType bt = Matcher::vector_element_basic_type(this, $vsrc);
+    uint length_in_bytes = Matcher::vector_length_in_bytes(this, $vsrc);
+    assert(length_in_bytes == MaxVectorSize, "invalid vector length");
+    __ sve_reduce_integral(this->ideal_Opcode(), $dst$$Register, bt,
+                           $isrc$$Register, $vsrc$$FloatRegister,
+                           ptrue, $tmp$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
+// reduction umaxL
+
+instruct reduce_umaxL_neon(iRegLNoSp dst, iRegL isrc, vReg vsrc, rFlagsReg cr) %{
+  predicate(UseSVE == 0 && Matcher::vector_element_basic_type(n->in(2)) == T_LONG);
+  match(Set dst (UMaxReductionV isrc vsrc));
+  effect(TEMP_DEF dst, KILL cr);
+  format %{ "reduce_umaxL_neon $dst, $isrc, $vsrc\t# 2L. KILL cr" %}
+  ins_encode %{
+    __ neon_reduce_minmax_integral(this->ideal_Opcode(), $dst$$Register, T_LONG,
+                                   $isrc$$Register, $vsrc$$FloatRegister,
+                                   /* vector_length_in_bytes */ 16, fnoreg);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
+instruct reduce_umaxL_sve(iRegLNoSp dst, iRegL isrc, vReg vsrc,
+                         vRegD tmp, rFlagsReg cr) %{
+  predicate(UseSVE > 0 && Matcher::vector_element_basic_type(n->in(2)) == T_LONG);
+  match(Set dst (UMaxReductionV isrc vsrc));
+  effect(TEMP_DEF dst, TEMP tmp, KILL cr);
+  format %{ "reduce_umaxL_sve $dst, $isrc, $vsrc\t# KILL $tmp, cr" %}
+  ins_encode %{
+    uint length_in_bytes = Matcher::vector_length_in_bytes(this, $vsrc);
+    assert(length_in_bytes == MaxVectorSize, "invalid vector length");
+    __ sve_reduce_integral(this->ideal_Opcode(), $dst$$Register, T_LONG,
+                           $isrc$$Register, $vsrc$$FloatRegister,
+                           ptrue, $tmp$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
+// reduction umax - predicated
+
+instruct reduce_umaxI_masked(iRegINoSp dst, iRegIorL2I isrc, vReg vsrc, pRegGov pg,
+                            vRegD tmp, rFlagsReg cr) %{
+  predicate(UseSVE > 0 &&
+            (Matcher::vector_element_basic_type(n->in(1)->in(2)) == T_BYTE ||
+             Matcher::vector_element_basic_type(n->in(1)->in(2)) == T_SHORT ||
+             Matcher::vector_element_basic_type(n->in(1)->in(2)) == T_INT));
+  match(Set dst (UMaxReductionV (Binary isrc vsrc) pg));
+  effect(TEMP_DEF dst, TEMP tmp, KILL cr);
+  format %{ "reduce_umaxI_masked $dst, $isrc, $pg, $vsrc\t# KILL $tmp, cr" %}
+  ins_encode %{
+    BasicType bt = Matcher::vector_element_basic_type(this, $vsrc);
+    __ sve_reduce_integral(this->ideal_Opcode(), $dst$$Register, bt,
+                           $isrc$$Register, $vsrc$$FloatRegister,
+                           $pg$$PRegister, $tmp$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
+instruct reduce_umaxL_masked(iRegLNoSp dst, iRegL isrc, vReg vsrc, pRegGov pg,
+                            vRegD tmp, rFlagsReg cr) %{
+  predicate(UseSVE > 0 && Matcher::vector_element_basic_type(n->in(1)->in(2)) == T_LONG);
+  match(Set dst (UMaxReductionV (Binary isrc vsrc) pg));
+  effect(TEMP_DEF dst, TEMP tmp, KILL cr);
+  format %{ "reduce_umaxL_masked $dst, $isrc, $pg, $vsrc\t# KILL $tmp, cr" %}
+  ins_encode %{
+    BasicType bt = Matcher::vector_element_basic_type(this, $vsrc);
+    __ sve_reduce_integral(this->ideal_Opcode(), $dst$$Register, bt,
+                           $isrc$$Register, $vsrc$$FloatRegister,
+                           $pg$$PRegister, $tmp$$FloatRegister);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
 // ------------------------------ Vector reinterpret ---------------------------
 
 instruct reinterpret_same_size(vReg dst_src) %{

src/hotspot/cpu/aarch64/aarch64_vector_ad.m4

@@ -1,5 +1,5 @@
 //
-// Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
+// Copyright (c) 2020, 2026, Oracle and/or its affiliates. All rights reserved.
 // Copyright (c) 2020, 2025, Arm Limited. All rights reserved.
 // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 //
@@ -191,6 +191,8 @@ source %{
       case Op_XorReductionV:
       case Op_MinReductionV:
       case Op_MaxReductionV:
+      case Op_UMinReductionV:
+      case Op_UMaxReductionV:
         // Reductions with less than 8 bytes vector length are
         // not supported.
         if (length_in_bytes < 8) {
@@ -373,6 +375,8 @@ source %{
         return !VM_Version::use_neon_for_vector(length_in_bytes);
       case Op_MinReductionV:
       case Op_MaxReductionV:
+      case Op_UMinReductionV:
+      case Op_UMaxReductionV:
         // For BYTE/SHORT/INT/FLOAT/DOUBLE types, we prefer using NEON
         // instructions rather than SVE predicated instructions for
         // better performance.
@@ -2505,6 +2509,32 @@ REDUCE_MAXMIN_INT_PREDICATE(min, L, iRegL,      MinReductionV)
 REDUCE_MAXMIN_FP_PREDICATE(min, F, fsrc, MinReductionV, sve_fminv, fmins)
 REDUCE_MAXMIN_FP_PREDICATE(min, D, dsrc, MinReductionV, sve_fminv, fmind)
 
+// -------------------- Vector reduction unsigned min/max ----------------------
+
+// reduction uminI
+REDUCE_MAXMIN_I_NEON(umin, UMinReductionV)
+REDUCE_MAXMIN_I_SVE(umin, UMinReductionV)
+
+// reduction uminL
+REDUCE_MAXMIN_L_NEON(umin, UMinReductionV)
+REDUCE_MAXMIN_L_SVE(umin, UMinReductionV)
+
+// reduction umin - predicated
+REDUCE_MAXMIN_INT_PREDICATE(umin, I, iRegIorL2I, UMinReductionV)
+REDUCE_MAXMIN_INT_PREDICATE(umin, L, iRegL,      UMinReductionV)
+
+// reduction umaxI
+REDUCE_MAXMIN_I_NEON(umax, UMaxReductionV)
+REDUCE_MAXMIN_I_SVE(umax, UMaxReductionV)
+
+// reduction umaxL
+REDUCE_MAXMIN_L_NEON(umax, UMaxReductionV)
+REDUCE_MAXMIN_L_SVE(umax, UMaxReductionV)
+
+// reduction umax - predicated
+REDUCE_MAXMIN_INT_PREDICATE(umax, I, iRegIorL2I, UMaxReductionV)
+REDUCE_MAXMIN_INT_PREDICATE(umax, L, iRegL,      UMaxReductionV)
+
 // ------------------------------ Vector reinterpret ---------------------------
 
 instruct reinterpret_same_size(vReg dst_src) %{

src/hotspot/cpu/aarch64/assembler_aarch64.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2026, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, 2024, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -2658,6 +2658,8 @@ template<typename R, typename... Rx>
   INSN(uminv,  1, 0b011011, false); // accepted arrangements: T8B, T16B, T4H, T8H, T2S, T4S
   INSN(smaxp,  0, 0b101001, false); // accepted arrangements: T8B, T16B, T4H, T8H, T2S, T4S
   INSN(sminp,  0, 0b101011, false); // accepted arrangements: T8B, T16B, T4H, T8H, T2S, T4S
+  INSN(umaxp,  1, 0b101001, false); // accepted arrangements: T8B, T16B, T4H, T8H, T2S, T4S
+  INSN(uminp,  1, 0b101011, false); // accepted arrangements: T8B, T16B, T4H, T8H, T2S, T4S
   INSN(sqdmulh,0, 0b101101, false); // accepted arrangements: T4H, T8H, T2S, T4S
   INSN(shsubv, 0, 0b001001, false); // accepted arrangements: T8B, T16B, T4H, T8H, T2S, T4S
 
@@ -3490,7 +3492,9 @@ public:
   INSN(sve_sub,   0b00000100, 0b000001000); // vector sub
   INSN(sve_uaddv, 0b00000100, 0b000001001); // unsigned add reduction to scalar
   INSN(sve_umax,  0b00000100, 0b001001000); // unsigned maximum vectors
+  INSN(sve_umaxv, 0b00000100, 0b001001001); // unsigned maximum reduction to scalar
   INSN(sve_umin,  0b00000100, 0b001011000); // unsigned minimum vectors
+  INSN(sve_uminv, 0b00000100, 0b001011001); // unsigned minimum reduction to scalar
 #undef INSN
 
 // SVE floating-point arithmetic - predicate
@@ -4325,6 +4329,7 @@ public:
 #undef INSN
 
   Assembler(CodeBuffer* code) : AbstractAssembler(code) {
+    MACOS_AARCH64_ONLY(os::thread_wx_enable_write());
   }
 
   // Stack overflow checking

src/hotspot/cpu/aarch64/assembler_aarch64.inline.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *

src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp

@@ -1218,43 +1218,11 @@ void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) {
   __ bind(*op->stub()->continuation());
 }
 
-void LIR_Assembler::type_profile_helper(Register mdo,
-                                        ciMethodData *md, ciProfileData *data,
-                                        Register recv, Label* update_done) {
+void LIR_Assembler::type_profile_helper(Register mdo, ciMethodData *md,
+                                        ciProfileData *data, Register recv) {
 
-  // Given a profile data offset, generate an Address which points to
-  // the corresponding slot in mdo->data().
-  // Clobbers rscratch2.
-  auto slot_at = [=](ByteSize offset) -> Address {
-    return __ form_address(rscratch2, mdo,
-                           md->byte_offset_of_slot(data, offset),
-                           LogBytesPerWord);
-  };
-
-  for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
-    Label next_test;
-    // See if the receiver is receiver[n].
-    __ ldr(rscratch1, slot_at(ReceiverTypeData::receiver_offset(i)));
-    __ cmp(recv, rscratch1);
-    __ br(Assembler::NE, next_test);
-    __ addptr(slot_at(ReceiverTypeData::receiver_count_offset(i)),
-              DataLayout::counter_increment);
-    __ b(*update_done);
-    __ bind(next_test);
-  }
-
-  // Didn't find receiver; find next empty slot and fill it in
-  for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
-    Label next_test;
-    Address recv_addr(slot_at(ReceiverTypeData::receiver_offset(i)));
-    __ ldr(rscratch1, recv_addr);
-    __ cbnz(rscratch1, next_test);
-    __ str(recv, recv_addr);
-    __ mov(rscratch1, DataLayout::counter_increment);
-    __ str(rscratch1, slot_at(ReceiverTypeData::receiver_count_offset(i)));
-    __ b(*update_done);
-    __ bind(next_test);
-  }
+  int mdp_offset = md->byte_offset_of_slot(data, in_ByteSize(0));
+  __ profile_receiver_type(recv, mdo, mdp_offset);
 }
 
 void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) {
@@ -1316,14 +1284,9 @@ void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, L
     __ b(*obj_is_null);
     __ bind(not_null);
 
-    Label update_done;
     Register recv = k_RInfo;
     __ load_klass(recv, obj);
-    type_profile_helper(mdo, md, data, recv, &update_done);
-    Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
-    __ addptr(counter_addr, DataLayout::counter_increment);
-
-    __ bind(update_done);
+    type_profile_helper(mdo, md, data, recv);
   } else {
     __ cbz(obj, *obj_is_null);
   }
@@ -1430,13 +1393,9 @@ void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) {
       __ b(done);
       __ bind(not_null);
 
-      Label update_done;
       Register recv = k_RInfo;
       __ load_klass(recv, value);
-      type_profile_helper(mdo, md, data, recv, &update_done);
-      Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
-      __ addptr(counter_addr, DataLayout::counter_increment);
-      __ bind(update_done);
+      type_profile_helper(mdo, md, data, recv);
     } else {
       __ cbz(value, done);
     }
@@ -2540,13 +2499,9 @@ void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) {
     if (C1OptimizeVirtualCallProfiling && known_klass != nullptr) {
       // We know the type that will be seen at this call site; we can
       // statically update the MethodData* rather than needing to do
-      // dynamic tests on the receiver type
-
-      // NOTE: we should probably put a lock around this search to
-      // avoid collisions by concurrent compilations
+      // dynamic tests on the receiver type.
       ciVirtualCallData* vc_data = (ciVirtualCallData*) data;
-      uint i;
-      for (i = 0; i < VirtualCallData::row_limit(); i++) {
+      for (uint i = 0; i < VirtualCallData::row_limit(); i++) {
         ciKlass* receiver = vc_data->receiver(i);
         if (known_klass->equals(receiver)) {
           Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
@@ -2554,36 +2509,13 @@ void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) {
           return;
         }
       }
-
-      // Receiver type not found in profile data; select an empty slot
-
-      // Note that this is less efficient than it should be because it
-      // always does a write to the receiver part of the
-      // VirtualCallData rather than just the first time
-      for (i = 0; i < VirtualCallData::row_limit(); i++) {
-        ciKlass* receiver = vc_data->receiver(i);
-        if (receiver == nullptr) {
-          __ mov_metadata(rscratch1, known_klass->constant_encoding());
-          Address recv_addr =
-            __ form_address(rscratch2, mdo,
-                            md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i)),
-                            LogBytesPerWord);
-          __ str(rscratch1, recv_addr);
-          Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
-          __ addptr(data_addr, DataLayout::counter_increment);
-          return;
-        }
-      }
+      // Receiver type is not found in profile data.
+      // Fall back to runtime helper to handle the rest at runtime.
+      __ mov_metadata(recv, known_klass->constant_encoding());
     } else {
       __ load_klass(recv, recv);
-      Label update_done;
-      type_profile_helper(mdo, md, data, recv, &update_done);
-      // Receiver did not match any saved receiver and there is no empty row for it.
-      // Increment total counter to indicate polymorphic case.
-      __ addptr(counter_addr, DataLayout::counter_increment);
-
-      __ bind(update_done);
     }
+    type_profile_helper(mdo, md, data, recv);
   } else {
     // Static call
     __ addptr(counter_addr, DataLayout::counter_increment);

src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2025, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -50,9 +50,8 @@ friend class ArrayCopyStub;
   Address stack_slot_address(int index, uint shift, Register tmp, int adjust = 0);
 
   // Record the type of the receiver in ReceiverTypeData
-  void type_profile_helper(Register mdo,
-                           ciMethodData *md, ciProfileData *data,
-                           Register recv, Label* update_done);
+  void type_profile_helper(Register mdo, ciMethodData *md,
+                           ciProfileData *data, Register recv);
   void add_debug_info_for_branch(address adr, CodeEmitInfo* info);
 
   void casw(Register addr, Register newval, Register cmpval);

src/hotspot/cpu/aarch64/c2_MacroAssembler_aarch64.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2026, 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
@@ -1960,50 +1960,76 @@ void C2_MacroAssembler::neon_reduce_logical(int opc, Register dst, BasicType bt,
   BLOCK_COMMENT("} neon_reduce_logical");
 }
 
-// Vector reduction min/max for integral type with ASIMD instructions.
+// Helper function to decode min/max reduction operation properties
+void C2_MacroAssembler::decode_minmax_reduction_opc(int opc, bool* is_min,
+                                                    bool* is_unsigned,
+                                                    Condition* cond) {
+  switch(opc) {
+    case Op_MinReductionV:
+      *is_min = true;  *is_unsigned = false; *cond = LT; break;
+    case Op_MaxReductionV:
+      *is_min = false; *is_unsigned = false; *cond = GT; break;
+    case Op_UMinReductionV:
+      *is_min = true;  *is_unsigned = true;  *cond = LO; break;
+    case Op_UMaxReductionV:
+      *is_min = false; *is_unsigned = true;  *cond = HI; break;
+    default:
+      ShouldNotReachHere();
+  }
+}
+
+// Vector reduction min/max/umin/umax for integral type with ASIMD instructions.
 // Note: vtmp is not used and expected to be fnoreg for T_LONG case.
 // Clobbers: rscratch1, rflags
 void C2_MacroAssembler::neon_reduce_minmax_integral(int opc, Register dst, BasicType bt,
                                                     Register isrc, FloatRegister vsrc,
                                                     unsigned vector_length_in_bytes,
                                                     FloatRegister vtmp) {
-  assert(opc == Op_MinReductionV || opc == Op_MaxReductionV, "unsupported");
+  assert(opc == Op_MinReductionV || opc == Op_MaxReductionV ||
+         opc == Op_UMinReductionV || opc == Op_UMaxReductionV, "unsupported");
   assert(vector_length_in_bytes == 8 || vector_length_in_bytes == 16, "unsupported");
   assert(bt == T_BYTE || bt == T_SHORT || bt == T_INT || bt == T_LONG, "unsupported");
   assert_different_registers(dst, isrc);
   bool isQ = vector_length_in_bytes == 16;
-  bool is_min = opc == Op_MinReductionV;
-
+  bool is_min;
+  bool is_unsigned;
+  Condition cond;
+  decode_minmax_reduction_opc(opc, &is_min, &is_unsigned, &cond);
   BLOCK_COMMENT("neon_reduce_minmax_integral {");
     if (bt == T_LONG) {
       assert(vtmp == fnoreg, "should be");
       assert(isQ, "should be");
       umov(rscratch1, vsrc, D, 0);
       cmp(isrc, rscratch1);
-      csel(dst, isrc, rscratch1, is_min ? LT : GT);
+      csel(dst, isrc, rscratch1, cond);
       umov(rscratch1, vsrc, D, 1);
       cmp(dst, rscratch1);
-      csel(dst, dst, rscratch1, is_min ? LT : GT);
+      csel(dst, dst, rscratch1, cond);
     } else {
       SIMD_Arrangement size = esize2arrangement((unsigned)type2aelembytes(bt), isQ);
       if (size == T2S) {
-        is_min ? sminp(vtmp, size, vsrc, vsrc) : smaxp(vtmp, size, vsrc, vsrc);
+        // For T2S (2x32-bit elements), use pairwise instructions because
+        // uminv/umaxv/sminv/smaxv don't support arrangement 2S.
+        neon_minmaxp(is_unsigned, is_min, vtmp, size, vsrc, vsrc);
       } else {
-        is_min ? sminv(vtmp, size, vsrc) : smaxv(vtmp, size, vsrc);
+        // For other sizes, use reduction to scalar instructions.
+        neon_minmaxv(is_unsigned, is_min, vtmp, size, vsrc);
       }
       if (bt == T_INT) {
         umov(dst, vtmp, S, 0);
+      } else if (is_unsigned) {
+        umov(dst, vtmp, elemType_to_regVariant(bt), 0);
       } else {
         smov(dst, vtmp, elemType_to_regVariant(bt), 0);
       }
       cmpw(dst, isrc);
-      cselw(dst, dst, isrc, is_min ? LT : GT);
+      cselw(dst, dst, isrc, cond);
     }
   BLOCK_COMMENT("} neon_reduce_minmax_integral");
 }
 
 // Vector reduction for integral type with SVE instruction.
-// Supported operations are Add, And, Or, Xor, Max, Min.
+// Supported operations are Add, And, Or, Xor, Max, Min, UMax, UMin.
 // rflags would be clobbered if opc is Op_MaxReductionV or Op_MinReductionV.
 void C2_MacroAssembler::sve_reduce_integral(int opc, Register dst, BasicType bt, Register src1,
                                             FloatRegister src2, PRegister pg, FloatRegister tmp) {
@@ -2075,35 +2101,27 @@ void C2_MacroAssembler::sve_reduce_integral(int opc, Register dst, BasicType bt,
       }
       break;
     }
-    case Op_MaxReductionV: {
-      sve_smaxv(tmp, size, pg, src2);
-      if (bt == T_INT || bt == T_LONG) {
+    case Op_MaxReductionV:
+    case Op_MinReductionV:
+    case Op_UMaxReductionV:
+    case Op_UMinReductionV: {
+      bool is_min;
+      bool is_unsigned;
+      Condition cond;
+      decode_minmax_reduction_opc(opc, &is_min, &is_unsigned, &cond);
+      sve_minmaxv(is_unsigned, is_min, tmp, size, pg, src2);
+      // Move result from vector to general register
+      if (is_unsigned || bt == T_INT || bt == T_LONG) {
         umov(dst, tmp, size, 0);
       } else {
         smov(dst, tmp, size, 0);
       }
       if (bt == T_LONG) {
         cmp(dst, src1);
-        csel(dst, dst, src1, Assembler::GT);
+        csel(dst, dst, src1, cond);
       } else {
         cmpw(dst, src1);
-        cselw(dst, dst, src1, Assembler::GT);
-      }
-      break;
-    }
-    case Op_MinReductionV: {
-      sve_sminv(tmp, size, pg, src2);
-      if (bt == T_INT || bt == T_LONG) {
-        umov(dst, tmp, size, 0);
-      } else {
-        smov(dst, tmp, size, 0);
-      }
-      if (bt == T_LONG) {
-        cmp(dst, src1);
-        csel(dst, dst, src1, Assembler::LT);
-      } else {
-        cmpw(dst, src1);
-        cselw(dst, dst, src1, Assembler::LT);
+        cselw(dst, dst, src1, cond);
       }
       break;
     }
@@ -2547,26 +2565,22 @@ void C2_MacroAssembler::verify_int_in_range(uint idx, const TypeInt* t, Register
   if (t == TypeInt::INT) {
     return;
   }
+
   BLOCK_COMMENT("verify_int_in_range {");
   Label L_success, L_failure;
 
   jint lo = t->_lo;
   jint hi = t->_hi;
 
-  if (lo != min_jint && hi != max_jint) {
+  if (lo != min_jint) {
     subsw(rtmp, rval, lo);
     br(Assembler::LT, L_failure);
-    subsw(rtmp, rval, hi);
-    br(Assembler::LE, L_success);
-  } else if (lo != min_jint) {
-    subsw(rtmp, rval, lo);
-    br(Assembler::GE, L_success);
-  } else if (hi != max_jint) {
-    subsw(rtmp, rval, hi);
-    br(Assembler::LE, L_success);
-  } else {
-    ShouldNotReachHere();
   }
+  if (hi != max_jint) {
+    subsw(rtmp, rval, hi);
+    br(Assembler::GT, L_failure);
+  }
+  b(L_success);
 
   bind(L_failure);
   movw(c_rarg0, idx);
@@ -2590,26 +2604,22 @@ void C2_MacroAssembler::verify_long_in_range(uint idx, const TypeLong* t, Regist
   if (t == TypeLong::LONG) {
     return;
   }
+
   BLOCK_COMMENT("verify_long_in_range {");
   Label L_success, L_failure;
 
   jlong lo = t->_lo;
   jlong hi = t->_hi;
 
-  if (lo != min_jlong && hi != max_jlong) {
+  if (lo != min_jlong) {
     subs(rtmp, rval, lo);
     br(Assembler::LT, L_failure);
-    subs(rtmp, rval, hi);
-    br(Assembler::LE, L_success);
-  } else if (lo != min_jlong) {
-    subs(rtmp, rval, lo);
-    br(Assembler::GE, L_success);
-  } else if (hi != max_jlong) {
-    subs(rtmp, rval, hi);
-    br(Assembler::LE, L_success);
-  } else {
-    ShouldNotReachHere();
   }
+  if (hi != max_jlong) {
+    subs(rtmp, rval, hi);
+    br(Assembler::GT, L_failure);
+  }
+  b(L_success);
 
   bind(L_failure);
   movw(c_rarg0, idx);

src/hotspot/cpu/aarch64/c2_MacroAssembler_aarch64.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2026, 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
@@ -34,6 +34,37 @@
   void neon_reduce_logical_helper(int opc, bool sf, Register Rd, Register Rn, Register Rm,
                                   enum shift_kind kind = Assembler::LSL, unsigned shift = 0);
 
+  // Helper functions for min/max reduction operations
+
+  void decode_minmax_reduction_opc(int opc, bool* is_min, bool* is_unsigned, Condition* cond);
+
+  void neon_minmaxp(bool is_unsigned, bool is_min, FloatRegister dst,
+                    SIMD_Arrangement size, FloatRegister src1, FloatRegister src2) {
+    auto m = is_unsigned ? (is_min ? &Assembler::uminp : &Assembler::umaxp)
+                         : (is_min ? &Assembler::sminp : &Assembler::smaxp);
+    (this->*m)(dst, size, src1, src2);
+  }
+
+  // Typedefs used to disambiguate overloaded member functions.
+  typedef void (Assembler::*neon_reduction2)
+    (FloatRegister, SIMD_Arrangement, FloatRegister);
+
+  void neon_minmaxv(bool is_unsigned, bool is_min, FloatRegister dst,
+                    SIMD_Arrangement size, FloatRegister src) {
+    auto m = is_unsigned ? (is_min ? (neon_reduction2)&Assembler::uminv
+                                   : (neon_reduction2)&Assembler::umaxv)
+                         : (is_min ? &Assembler::sminv
+                                   : &Assembler::smaxv);
+    (this->*m)(dst, size, src);
+  }
+
+  void sve_minmaxv(bool is_unsigned, bool is_min, FloatRegister dst,
+                   SIMD_RegVariant size, PRegister pg, FloatRegister src) {
+    auto m = is_unsigned ? (is_min ? &Assembler::sve_uminv : &Assembler::sve_umaxv)
+                         : (is_min ? &Assembler::sve_sminv : &Assembler::sve_smaxv);
+    (this->*m)(dst, size, pg, src);
+  }
+
   void select_from_two_vectors_neon(FloatRegister dst, FloatRegister src1,
                                     FloatRegister src2, FloatRegister index,
                                     FloatRegister tmp, unsigned vector_length_in_bytes);

src/hotspot/cpu/aarch64/continuationHelper_aarch64.inline.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, 2025, 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

src/hotspot/cpu/aarch64/gc/shared/barrierSetAssembler_aarch64.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2025, 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

src/hotspot/cpu/aarch64/gc/shared/barrierSetNMethod_aarch64.cpp

@@ -209,6 +209,10 @@ void BarrierSetNMethod::set_guard_value(nmethod* nm, int value, int bit_mask) {
     bs_asm->increment_patching_epoch();
   }
 
+  // Enable WXWrite: the function is called directly from nmethod_entry_barrier
+  // stub.
+  MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, Thread::current()));
+
   NativeNMethodBarrier barrier(nm);
   barrier.set_value(value, bit_mask);
 }

src/hotspot/cpu/aarch64/gc/shared/cardTableBarrierSetAssembler_aarch64.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2025, 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

src/hotspot/cpu/aarch64/gc/shenandoah/shenandoahBarrierSetAssembler_aarch64.cpp

@@ -85,26 +85,16 @@ void ShenandoahBarrierSetAssembler::arraycopy_epilogue(MacroAssembler* masm, Dec
   }
 }
 
-void ShenandoahBarrierSetAssembler::shenandoah_write_barrier_pre(MacroAssembler* masm,
-                                                                 Register obj,
-                                                                 Register pre_val,
-                                                                 Register thread,
-                                                                 Register tmp,
-                                                                 bool tosca_live,
-                                                                 bool expand_call) {
-  if (ShenandoahSATBBarrier) {
-    satb_write_barrier_pre(masm, obj, pre_val, thread, tmp, rscratch1, tosca_live, expand_call);
-  }
-}
+void ShenandoahBarrierSetAssembler::satb_barrier(MacroAssembler* masm,
+                                                 Register obj,
+                                                 Register pre_val,
+                                                 Register thread,
+                                                 Register tmp1,
+                                                 Register tmp2,
+                                                 bool tosca_live,
+                                                 bool expand_call) {
+  assert(ShenandoahSATBBarrier, "Should be checked by caller");
 
-void ShenandoahBarrierSetAssembler::satb_write_barrier_pre(MacroAssembler* masm,
-                                                           Register obj,
-                                                           Register pre_val,
-                                                           Register thread,
-                                                           Register tmp1,
-                                                           Register tmp2,
-                                                           bool tosca_live,
-                                                           bool expand_call) {
   // If expand_call is true then we expand the call_VM_leaf macro
   // directly to skip generating the check by
   // InterpreterMacroAssembler::call_VM_leaf_base that checks _last_sp.
@@ -358,20 +348,20 @@ void ShenandoahBarrierSetAssembler::load_at(MacroAssembler* masm, DecoratorSet d
   if (ShenandoahBarrierSet::need_keep_alive_barrier(decorators, type)) {
     __ enter(/*strip_ret_addr*/true);
     __ push_call_clobbered_registers();
-    satb_write_barrier_pre(masm /* masm */,
-                           noreg /* obj */,
-                           dst /* pre_val */,
-                           rthread /* thread */,
-                           tmp1 /* tmp1 */,
-                           tmp2 /* tmp2 */,
-                           true /* tosca_live */,
-                           true /* expand_call */);
+    satb_barrier(masm /* masm */,
+                 noreg /* obj */,
+                 dst /* pre_val */,
+                 rthread /* thread */,
+                 tmp1 /* tmp1 */,
+                 tmp2 /* tmp2 */,
+                 true /* tosca_live */,
+                 true /* expand_call */);
     __ pop_call_clobbered_registers();
     __ leave();
   }
 }
 
-void ShenandoahBarrierSetAssembler::store_check(MacroAssembler* masm, Register obj) {
+void ShenandoahBarrierSetAssembler::card_barrier(MacroAssembler* masm, Register obj) {
   assert(ShenandoahCardBarrier, "Should have been checked by caller");
 
   __ lsr(obj, obj, CardTable::card_shift());
@@ -394,13 +384,13 @@ void ShenandoahBarrierSetAssembler::store_check(MacroAssembler* masm, Register o
 
 void ShenandoahBarrierSetAssembler::store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
                                              Address dst, Register val, Register tmp1, Register tmp2, Register tmp3) {
-  bool on_oop = is_reference_type(type);
-  if (!on_oop) {
+  // 1: non-reference types require no barriers
+  if (!is_reference_type(type)) {
     BarrierSetAssembler::store_at(masm, decorators, type, dst, val, tmp1, tmp2, tmp3);
     return;
   }
 
-  // flatten object address if needed
+  // Flatten object address right away for simplicity: likely needed by barriers
   if (dst.index() == noreg && dst.offset() == 0) {
     if (dst.base() != tmp3) {
       __ mov(tmp3, dst.base());
@@ -409,20 +399,26 @@ void ShenandoahBarrierSetAssembler::store_at(MacroAssembler* masm, DecoratorSet
     __ lea(tmp3, dst);
   }
 
-  shenandoah_write_barrier_pre(masm,
-                               tmp3 /* obj */,
-                               tmp2 /* pre_val */,
-                               rthread /* thread */,
-                               tmp1  /* tmp */,
-                               val != noreg /* tosca_live */,
-                               false /* expand_call */);
+  bool storing_non_null = (val != noreg);
 
+  // 2: pre-barrier: SATB needs the previous value
+  if (ShenandoahBarrierSet::need_satb_barrier(decorators, type)) {
+    satb_barrier(masm,
+                 tmp3 /* obj */,
+                 tmp2 /* pre_val */,
+                 rthread /* thread */,
+                 tmp1 /* tmp */,
+                 rscratch1 /* tmp2 */,
+                 storing_non_null /* tosca_live */,
+                 false /* expand_call */);
+  }
+
+  // Store!
   BarrierSetAssembler::store_at(masm, decorators, type, Address(tmp3, 0), val, noreg, noreg, noreg);
 
-  bool in_heap = (decorators & IN_HEAP) != 0;
-  bool needs_post_barrier = (val != noreg) && in_heap && ShenandoahCardBarrier;
-  if (needs_post_barrier) {
-    store_check(masm, tmp3);
+  // 3: post-barrier: card barrier needs store address
+  if (ShenandoahBarrierSet::need_card_barrier(decorators, type) && storing_non_null) {
+    card_barrier(masm, tmp3);
   }
 }
 

src/hotspot/cpu/aarch64/gc/shenandoah/shenandoahBarrierSetAssembler_aarch64.hpp

@@ -40,23 +40,16 @@ class StubCodeGenerator;
 class ShenandoahBarrierSetAssembler: public BarrierSetAssembler {
 private:
 
-  void satb_write_barrier_pre(MacroAssembler* masm,
-                              Register obj,
-                              Register pre_val,
-                              Register thread,
-                              Register tmp1,
-                              Register tmp2,
-                              bool tosca_live,
-                              bool expand_call);
-  void shenandoah_write_barrier_pre(MacroAssembler* masm,
-                                    Register obj,
-                                    Register pre_val,
-                                    Register thread,
-                                    Register tmp,
-                                    bool tosca_live,
-                                    bool expand_call);
+  void satb_barrier(MacroAssembler* masm,
+                    Register obj,
+                    Register pre_val,
+                    Register thread,
+                    Register tmp1,
+                    Register tmp2,
+                    bool tosca_live,
+                    bool expand_call);
 
-  void store_check(MacroAssembler* masm, Register obj);
+  void card_barrier(MacroAssembler* masm, Register obj);
 
   void resolve_forward_pointer(MacroAssembler* masm, Register dst, Register tmp = noreg);
   void resolve_forward_pointer_not_null(MacroAssembler* masm, Register dst, Register tmp = noreg);

src/hotspot/cpu/aarch64/gc/z/zBarrierSetAssembler_aarch64.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2025, 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

src/hotspot/cpu/aarch64/gc/z/z_aarch64.ad

@@ -1,5 +1,5 @@
 //
-// Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
+// Copyright (c) 2019, 2025, 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

src/hotspot/cpu/aarch64/globals_aarch64.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2015, 2019, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -39,7 +39,7 @@ define_pd_global(bool, UncommonNullCast,         true);  // Uncommon-trap nulls
 define_pd_global(bool, DelayCompilerStubsGeneration, COMPILER2_OR_JVMCI);
 
 define_pd_global(size_t, CodeCacheSegmentSize,   64);
-define_pd_global(intx, CodeEntryAlignment,       64);
+define_pd_global(uint, CodeEntryAlignment,       64);
 define_pd_global(intx, OptoLoopAlignment,        16);
 
 #define DEFAULT_STACK_YELLOW_PAGES (2)

src/hotspot/cpu/aarch64/immediate_aarch64.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, 2020, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -23,13 +23,13 @@
  *
  */
 
-#include <stdlib.h> // do not reorder
-#include <stdint.h> // do not reorder
-
+#include "cppstdlib/cstdlib.hpp"
 #include "immediate_aarch64.hpp"
 #include "metaprogramming/primitiveConversions.hpp"
 #include "utilities/globalDefinitions.hpp"
 
+#include <stdint.h>
+
 // there are at most 2^13 possible logical immediate encodings
 // however, some combinations of immr and imms are invalid
 static const unsigned  LI_TABLE_SIZE = (1 << 13);

src/hotspot/cpu/aarch64/immediate_aarch64.hpp

@@ -1,4 +1,5 @@
 /*
+ * Copyright (c) 2025, 2026, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -22,10 +23,10 @@
  *
  */
 
-#ifndef _IMMEDIATE_H
-#define _IMMEDIATE_H
+#ifndef CPU_AARCH64_IMMEDIATE_AARCH64_HPP
+#define CPU_AARCH64_IMMEDIATE_AARCH64_HPP
 
-#include <sys/types.h>
+#include <stdint.h>
 
 /*
  * functions to map backwards and forwards between logical or floating
@@ -51,4 +52,4 @@ uint32_t encoding_for_logical_immediate(uint64_t immediate);
 uint64_t fp_immediate_for_encoding(uint32_t imm8, int is_dp);
 uint32_t encoding_for_fp_immediate(float immediate);
 
-#endif // _IMMEDIATE_H
+#endif // CPU_AARCH64_IMMEDIATE_AARCH64_HPP

src/hotspot/cpu/aarch64/interp_masm_aarch64.cpp

@@ -240,15 +240,14 @@ void InterpreterMacroAssembler::load_resolved_klass_at_offset(
 //      Rsub_klass: subklass
 //
 // Kills:
-//      r2, r5
+//      r2
 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
                                                   Label& ok_is_subtype) {
   assert(Rsub_klass != r0, "r0 holds superklass");
   assert(Rsub_klass != r2, "r2 holds 2ndary super array length");
-  assert(Rsub_klass != r5, "r5 holds 2ndary super array scan ptr");
 
   // Profile the not-null value's klass.
-  profile_typecheck(r2, Rsub_klass, r5); // blows r2, reloads r5
+  profile_typecheck(r2, Rsub_klass); // blows r2
 
   // Do the check.
   check_klass_subtype(Rsub_klass, r0, r2, ok_is_subtype); // blows r2
@@ -991,7 +990,6 @@ void InterpreterMacroAssembler::profile_final_call(Register mdp) {
 
 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
                                                      Register mdp,
-                                                     Register reg2,
                                                      bool receiver_can_be_null) {
   if (ProfileInterpreter) {
     Label profile_continue;
@@ -1009,7 +1007,7 @@ void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
     }
 
     // Record the receiver type.
-    record_klass_in_profile(receiver, mdp, reg2);
+    profile_receiver_type(receiver, mdp, 0);
     bind(skip_receiver_profile);
 
     // The method data pointer needs to be updated to reflect the new target.
@@ -1018,131 +1016,6 @@ void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
   }
 }
 
-// This routine creates a state machine for updating the multi-row
-// type profile at a virtual call site (or other type-sensitive bytecode).
-// The machine visits each row (of receiver/count) until the receiver type
-// is found, or until it runs out of rows.  At the same time, it remembers
-// the location of the first empty row.  (An empty row records null for its
-// receiver, and can be allocated for a newly-observed receiver type.)
-// Because there are two degrees of freedom in the state, a simple linear
-// search will not work; it must be a decision tree.  Hence this helper
-// function is recursive, to generate the required tree structured code.
-// It's the interpreter, so we are trading off code space for speed.
-// See below for example code.
-void InterpreterMacroAssembler::record_klass_in_profile_helper(
-                                        Register receiver, Register mdp,
-                                        Register reg2, int start_row,
-                                        Label& done) {
-  if (TypeProfileWidth == 0) {
-    increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
-  } else {
-    record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
-        &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset);
-  }
-}
-
-void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp,
-                                        Register reg2, int start_row, Label& done, int total_rows,
-                                        OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn) {
-  int last_row = total_rows - 1;
-  assert(start_row <= last_row, "must be work left to do");
-  // Test this row for both the item and for null.
-  // Take any of three different outcomes:
-  //   1. found item => increment count and goto done
-  //   2. found null => keep looking for case 1, maybe allocate this cell
-  //   3. found something else => keep looking for cases 1 and 2
-  // Case 3 is handled by a recursive call.
-  for (int row = start_row; row <= last_row; row++) {
-    Label next_test;
-    bool test_for_null_also = (row == start_row);
-
-    // See if the item is item[n].
-    int item_offset = in_bytes(item_offset_fn(row));
-    test_mdp_data_at(mdp, item_offset, item,
-                     (test_for_null_also ? reg2 : noreg),
-                     next_test);
-    // (Reg2 now contains the item from the CallData.)
-
-    // The item is item[n].  Increment count[n].
-    int count_offset = in_bytes(item_count_offset_fn(row));
-    increment_mdp_data_at(mdp, count_offset);
-    b(done);
-    bind(next_test);
-
-    if (test_for_null_also) {
-      Label found_null;
-      // Failed the equality check on item[n]...  Test for null.
-      if (start_row == last_row) {
-        // The only thing left to do is handle the null case.
-        cbz(reg2, found_null);
-        // Item did not match any saved item and there is no empty row for it.
-        // Increment total counter to indicate polymorphic case.
-        increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
-        b(done);
-        bind(found_null);
-        break;
-      }
-      // Since null is rare, make it be the branch-taken case.
-      cbz(reg2, found_null);
-
-      // Put all the "Case 3" tests here.
-      record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows,
-        item_offset_fn, item_count_offset_fn);
-
-      // Found a null.  Keep searching for a matching item,
-      // but remember that this is an empty (unused) slot.
-      bind(found_null);
-    }
-  }
-
-  // In the fall-through case, we found no matching item, but we
-  // observed the item[start_row] is null.
-
-  // Fill in the item field and increment the count.
-  int item_offset = in_bytes(item_offset_fn(start_row));
-  set_mdp_data_at(mdp, item_offset, item);
-  int count_offset = in_bytes(item_count_offset_fn(start_row));
-  mov(reg2, DataLayout::counter_increment);
-  set_mdp_data_at(mdp, count_offset, reg2);
-  if (start_row > 0) {
-    b(done);
-  }
-}
-
-// Example state machine code for three profile rows:
-//   // main copy of decision tree, rooted at row[1]
-//   if (row[0].rec == rec) { row[0].incr(); goto done; }
-//   if (row[0].rec != nullptr) {
-//     // inner copy of decision tree, rooted at row[1]
-//     if (row[1].rec == rec) { row[1].incr(); goto done; }
-//     if (row[1].rec != nullptr) {
-//       // degenerate decision tree, rooted at row[2]
-//       if (row[2].rec == rec) { row[2].incr(); goto done; }
-//       if (row[2].rec != nullptr) { count.incr(); goto done; } // overflow
-//       row[2].init(rec); goto done;
-//     } else {
-//       // remember row[1] is empty
-//       if (row[2].rec == rec) { row[2].incr(); goto done; }
-//       row[1].init(rec); goto done;
-//     }
-//   } else {
-//     // remember row[0] is empty
-//     if (row[1].rec == rec) { row[1].incr(); goto done; }
-//     if (row[2].rec == rec) { row[2].incr(); goto done; }
-//     row[0].init(rec); goto done;
-//   }
-//   done:
-
-void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
-                                                        Register mdp, Register reg2) {
-  assert(ProfileInterpreter, "must be profiling");
-  Label done;
-
-  record_klass_in_profile_helper(receiver, mdp, reg2, 0, done);
-
-  bind (done);
-}
-
 void InterpreterMacroAssembler::profile_ret(Register return_bci,
                                             Register mdp) {
   if (ProfileInterpreter) {
@@ -1200,7 +1073,7 @@ void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
   }
 }
 
-void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
+void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass) {
   if (ProfileInterpreter) {
     Label profile_continue;
 
@@ -1213,7 +1086,7 @@ void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass,
       mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
 
       // Record the object type.
-      record_klass_in_profile(klass, mdp, reg2);
+      profile_receiver_type(klass, mdp, 0);
     }
     update_mdp_by_constant(mdp, mdp_delta);
 

src/hotspot/cpu/aarch64/interp_masm_aarch64.hpp

@@ -273,15 +273,6 @@ class InterpreterMacroAssembler: public MacroAssembler {
                         Register test_value_out,
                         Label& not_equal_continue);
 
-  void record_klass_in_profile(Register receiver, Register mdp,
-                               Register reg2);
-  void record_klass_in_profile_helper(Register receiver, Register mdp,
-                                      Register reg2, int start_row,
-                                      Label& done);
-  void record_item_in_profile_helper(Register item, Register mdp,
-                                     Register reg2, int start_row, Label& done, int total_rows,
-                                     OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn);
-
   void update_mdp_by_offset(Register mdp_in, int offset_of_offset);
   void update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp);
   void update_mdp_by_constant(Register mdp_in, int constant);
@@ -295,11 +286,10 @@ class InterpreterMacroAssembler: public MacroAssembler {
   void profile_call(Register mdp);
   void profile_final_call(Register mdp);
   void profile_virtual_call(Register receiver, Register mdp,
-                            Register scratch2,
                             bool receiver_can_be_null = false);
   void profile_ret(Register return_bci, Register mdp);
   void profile_null_seen(Register mdp);
-  void profile_typecheck(Register mdp, Register klass, Register scratch);
+  void profile_typecheck(Register mdp, Register klass);
   void profile_typecheck_failed(Register mdp);
   void profile_switch_default(Register mdp);
   void profile_switch_case(Register index_in_scratch, Register mdp,

src/hotspot/cpu/aarch64/javaFrameAnchor_aarch64.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2025, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *

src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2026, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, 2024, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -473,6 +473,7 @@ address MacroAssembler::target_addr_for_insn(address insn_addr) {
 // Patch any kind of instruction; there may be several instructions.
 // Return the total length (in bytes) of the instructions.
 int MacroAssembler::pd_patch_instruction_size(address insn_addr, address target) {
+  MACOS_AARCH64_ONLY(os::thread_wx_enable_write());
   return RelocActions<Patcher>::run(insn_addr, target);
 }
 
@@ -481,6 +482,8 @@ int MacroAssembler::patch_oop(address insn_addr, address o) {
   unsigned insn = *(unsigned*)insn_addr;
   assert(nativeInstruction_at(insn_addr+4)->is_movk(), "wrong insns in patch");
 
+  MACOS_AARCH64_ONLY(os::thread_wx_enable_write());
+
   // OOPs are either narrow (32 bits) or wide (48 bits).  We encode
   // narrow OOPs by setting the upper 16 bits in the first
   // instruction.
@@ -510,6 +513,8 @@ int MacroAssembler::patch_narrow_klass(address insn_addr, narrowKlass n) {
   assert(Instruction_aarch64::extract(insn->encoding(), 31, 21) == 0b11010010101 &&
          nativeInstruction_at(insn_addr+4)->is_movk(), "wrong insns in patch");
 
+  MACOS_AARCH64_ONLY(os::thread_wx_enable_write());
+
   Instruction_aarch64::patch(insn_addr, 20, 5, n >> 16);
   Instruction_aarch64::patch(insn_addr+4, 20, 5, n & 0xffff);
   return 2 * NativeInstruction::instruction_size;
@@ -2118,6 +2123,161 @@ Address MacroAssembler::argument_address(RegisterOrConstant arg_slot,
   }
 }
 
+// Handle the receiver type profile update given the "recv" klass.
+//
+// Normally updates the ReceiverData (RD) that starts at "mdp" + "mdp_offset".
+// If there are no matching or claimable receiver entries in RD, updates
+// the polymorphic counter.
+//
+// This code expected to run by either the interpreter or JIT-ed code, without
+// extra synchronization. For safety, receiver cells are claimed atomically, which
+// avoids grossly misrepresenting the profiles under concurrent updates. For speed,
+// counter updates are not atomic.
+//
+void MacroAssembler::profile_receiver_type(Register recv, Register mdp, int mdp_offset) {
+  assert_different_registers(recv, mdp, rscratch1, rscratch2);
+
+  int base_receiver_offset   = in_bytes(ReceiverTypeData::receiver_offset(0));
+  int end_receiver_offset    = in_bytes(ReceiverTypeData::receiver_offset(ReceiverTypeData::row_limit()));
+  int poly_count_offset      = in_bytes(CounterData::count_offset());
+  int receiver_step          = in_bytes(ReceiverTypeData::receiver_offset(1)) - base_receiver_offset;
+  int receiver_to_count_step = in_bytes(ReceiverTypeData::receiver_count_offset(0)) - base_receiver_offset;
+
+  // Adjust for MDP offsets.
+  base_receiver_offset += mdp_offset;
+  end_receiver_offset  += mdp_offset;
+  poly_count_offset    += mdp_offset;
+
+#ifdef ASSERT
+  // We are about to walk the MDO slots without asking for offsets.
+  // Check that our math hits all the right spots.
+  for (uint c = 0; c < ReceiverTypeData::row_limit(); c++) {
+    int real_recv_offset  = mdp_offset + in_bytes(ReceiverTypeData::receiver_offset(c));
+    int real_count_offset = mdp_offset + in_bytes(ReceiverTypeData::receiver_count_offset(c));
+    int offset = base_receiver_offset + receiver_step*c;
+    int count_offset = offset + receiver_to_count_step;
+    assert(offset == real_recv_offset, "receiver slot math");
+    assert(count_offset == real_count_offset, "receiver count math");
+  }
+  int real_poly_count_offset = mdp_offset + in_bytes(CounterData::count_offset());
+  assert(poly_count_offset == real_poly_count_offset, "poly counter math");
+#endif
+
+  // Corner case: no profile table. Increment poly counter and exit.
+  if (ReceiverTypeData::row_limit() == 0) {
+    increment(Address(mdp, poly_count_offset), DataLayout::counter_increment);
+    return;
+  }
+
+  Register offset = rscratch2;
+
+  Label L_loop_search_receiver, L_loop_search_empty;
+  Label L_restart, L_found_recv, L_found_empty, L_polymorphic, L_count_update;
+
+  // The code here recognizes three major cases:
+  //   A. Fastest: receiver found in the table
+  //   B. Fast: no receiver in the table, and the table is full
+  //   C. Slow: no receiver in the table, free slots in the table
+  //
+  // The case A performance is most important, as perfectly-behaved code would end up
+  // there, especially with larger TypeProfileWidth. The case B performance is
+  // important as well, this is where bulk of code would land for normally megamorphic
+  // cases. The case C performance is not essential, its job is to deal with installation
+  // races, we optimize for code density instead. Case C needs to make sure that receiver
+  // rows are only claimed once. This makes sure we never overwrite a row for another
+  // receiver and never duplicate the receivers in the list, making profile type-accurate.
+  //
+  // It is very tempting to handle these cases in a single loop, and claim the first slot
+  // without checking the rest of the table. But, profiling code should tolerate free slots
+  // in the table, as class unloading can clear them. After such cleanup, the receiver
+  // we need might be _after_ the free slot. Therefore, we need to let at least full scan
+  // to complete, before trying to install new slots. Splitting the code in several tight
+  // loops also helpfully optimizes for cases A and B.
+  //
+  // This code is effectively:
+  //
+  // restart:
+  //   // Fastest: receiver is already installed
+  //   for (i = 0; i < receiver_count(); i++) {
+  //     if (receiver(i) == recv) goto found_recv(i);
+  //   }
+  //
+  //   // Fast: no receiver, but profile is full
+  //   for (i = 0; i < receiver_count(); i++) {
+  //     if (receiver(i) == null) goto found_null(i);
+  //   }
+  //   goto polymorphic
+  //
+  //   // Slow: try to install receiver
+  // found_null(i):
+  //   CAS(&receiver(i), null, recv);
+  //   goto restart
+  //
+  // polymorphic:
+  //   count++;
+  //   return
+  //
+  // found_recv(i):
+  //   *receiver_count(i)++
+  //
+
+  bind(L_restart);
+
+  // Fastest: receiver is already installed
+  mov(offset, base_receiver_offset);
+  bind(L_loop_search_receiver);
+    ldr(rscratch1, Address(mdp, offset));
+    cmp(rscratch1, recv);
+    br(Assembler::EQ, L_found_recv);
+  add(offset, offset, receiver_step);
+  sub(rscratch1, offset, end_receiver_offset);
+  cbnz(rscratch1, L_loop_search_receiver);
+
+  // Fast: no receiver, but profile is full
+  mov(offset, base_receiver_offset);
+  bind(L_loop_search_empty);
+    ldr(rscratch1, Address(mdp, offset));
+    cbz(rscratch1, L_found_empty);
+  add(offset, offset, receiver_step);
+  sub(rscratch1, offset, end_receiver_offset);
+  cbnz(rscratch1, L_loop_search_empty);
+  b(L_polymorphic);
+
+  // Slow: try to install receiver
+  bind(L_found_empty);
+
+  // Atomically swing receiver slot: null -> recv.
+  //
+  // The update uses CAS, which clobbers rscratch1. Therefore, rscratch2
+  // is used to hold the destination address. This is safe because the
+  // offset is no longer needed after the address is computed.
+
+  lea(rscratch2, Address(mdp, offset));
+  cmpxchg(/*addr*/ rscratch2, /*expected*/ zr, /*new*/ recv, Assembler::xword,
+          /*acquire*/ false, /*release*/ false, /*weak*/ true, noreg);
+
+  // CAS success means the slot now has the receiver we want. CAS failure means
+  // something had claimed the slot concurrently: it can be the same receiver we want,
+  // or something else. Since this is a slow path, we can optimize for code density,
+  // and just restart the search from the beginning.
+  b(L_restart);
+
+  // Counter updates:
+
+  // Increment polymorphic counter instead of receiver slot.
+  bind(L_polymorphic);
+  mov(offset, poly_count_offset);
+  b(L_count_update);
+
+  // Found a receiver, convert its slot offset to corresponding count offset.
+  bind(L_found_recv);
+  add(offset, offset, receiver_to_count_step);
+
+  bind(L_count_update);
+  increment(Address(mdp, offset), DataLayout::counter_increment);
+}
+
+
 void MacroAssembler::call_VM_leaf_base(address entry_point,
                                        int number_of_arguments,
                                        Label *retaddr) {
@@ -5606,12 +5766,11 @@ void MacroAssembler::adrp(Register reg1, const Address &dest, uint64_t &byte_off
 }
 
 void MacroAssembler::load_byte_map_base(Register reg) {
-  CardTable::CardValue* byte_map_base =
-    ((CardTableBarrierSet*)(BarrierSet::barrier_set()))->card_table()->byte_map_base();
+  CardTableBarrierSet* ctbs = CardTableBarrierSet::barrier_set();
 
-  // Strictly speaking the byte_map_base isn't an address at all, and it might
+  // Strictly speaking the card table base isn't an address at all, and it might
   // even be negative. It is thus materialised as a constant.
-  mov(reg, (uint64_t)byte_map_base);
+  mov(reg, (uint64_t)ctbs->card_table_base_const());
 }
 
 void MacroAssembler::build_frame(int framesize) {
@@ -5782,6 +5941,9 @@ address MacroAssembler::arrays_equals(Register a1, Register a2, Register tmp3,
     //      return false;
     bind(A_IS_NOT_NULL);
     ldrw(cnt1, Address(a1, length_offset));
+    ldrw(tmp5, Address(a2, length_offset));
+    cmp(cnt1, tmp5);
+    br(NE, DONE); // If lengths differ, return false
     // Increase loop counter by diff between base- and actual start-offset.
     addw(cnt1, cnt1, extra_length);
     lea(a1, Address(a1, start_offset));
@@ -5848,6 +6010,9 @@ address MacroAssembler::arrays_equals(Register a1, Register a2, Register tmp3,
     cbz(a1, DONE);
     ldrw(cnt1, Address(a1, length_offset));
     cbz(a2, DONE);
+    ldrw(tmp5, Address(a2, length_offset));
+    cmp(cnt1, tmp5);
+    br(NE, DONE); // If lengths differ, return false
     // Increase loop counter by diff between base- and actual start-offset.
     addw(cnt1, cnt1, extra_length);
 
@@ -6259,10 +6424,14 @@ void MacroAssembler::fill_words(Register base, Register cnt, Register value)
 
 // Intrinsic for
 //
-// - sun/nio/cs/ISO_8859_1$Encoder.implEncodeISOArray
-//     return the number of characters copied.
-// - java/lang/StringUTF16.compress
-//     return index of non-latin1 character if copy fails, otherwise 'len'.
+// - sun.nio.cs.ISO_8859_1.Encoder#encodeISOArray0(byte[] sa, int sp, byte[] da, int dp, int len)
+//   Encodes char[] to byte[] in ISO-8859-1
+//
+// - java.lang.StringCoding#encodeISOArray0(byte[] sa, int sp, byte[] da, int dp, int len)
+//   Encodes byte[] (containing UTF-16) to byte[] in ISO-8859-1
+//
+// - java.lang.StringCoding#encodeAsciiArray0(char[] sa, int sp, byte[] da, int dp, int len)
+//   Encodes char[] to byte[] in ASCII
 //
 // This version always returns the number of characters copied, and does not
 // clobber the 'len' register. A successful copy will complete with the post-

src/hotspot/cpu/aarch64/macroAssembler_aarch64.hpp

@@ -1122,6 +1122,8 @@ public:
 
   Address argument_address(RegisterOrConstant arg_slot, int extra_slot_offset = 0);
 
+  void profile_receiver_type(Register recv, Register mdp, int mdp_offset);
+
   void verify_sve_vector_length(Register tmp = rscratch1);
   void reinitialize_ptrue() {
     if (UseSVE > 0) {

src/hotspot/cpu/aarch64/methodHandles_aarch64.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 2025, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *

src/hotspot/cpu/aarch64/nativeInst_aarch64.cpp

@@ -133,7 +133,6 @@ void NativeMovConstReg::verify() {
 
 
 intptr_t NativeMovConstReg::data() const {
-  // das(uint64_t(instruction_address()),2);
   address addr = MacroAssembler::target_addr_for_insn(instruction_address());
   if (maybe_cpool_ref(instruction_address())) {
     return *(intptr_t*)addr;
@@ -144,6 +143,7 @@ intptr_t NativeMovConstReg::data() const {
 
 void NativeMovConstReg::set_data(intptr_t x) {
   if (maybe_cpool_ref(instruction_address())) {
+    MACOS_AARCH64_ONLY(os::thread_wx_enable_write());
     address addr = MacroAssembler::target_addr_for_insn(instruction_address());
     *(intptr_t*)addr = x;
   } else {
@@ -350,8 +350,6 @@ bool NativeInstruction::is_stop() {
 
 //-------------------------------------------------------------------
 
-void NativeGeneralJump::verify() {  }
-
 // MT-safe patching of a long jump instruction.
 void NativeGeneralJump::replace_mt_safe(address instr_addr, address code_buffer) {
   ShouldNotCallThis();

src/hotspot/cpu/aarch64/nativeInst_aarch64.hpp

@@ -90,16 +90,18 @@ protected:
 
   s_char sbyte_at(int offset) const { return *(s_char*)addr_at(offset); }
   u_char ubyte_at(int offset) const { return *(u_char*)addr_at(offset); }
-  jint int_at(int offset) const { return *(jint*)addr_at(offset); }
-  juint uint_at(int offset) const { return *(juint*)addr_at(offset); }
-  address ptr_at(int offset) const { return *(address*)addr_at(offset); }
-  oop oop_at(int offset) const { return *(oop*)addr_at(offset); }
+  jint int_at(int offset) const     { return *(jint*)addr_at(offset); }
+  juint uint_at(int offset) const   { return *(juint*)addr_at(offset); }
+  address ptr_at(int offset) const  { return *(address*)addr_at(offset); }
+  oop oop_at(int offset) const      { return *(oop*)addr_at(offset); }
 
-  void set_char_at(int offset, char c) { *addr_at(offset) = (u_char)c; }
-  void set_int_at(int offset, jint i) { *(jint*)addr_at(offset) = i; }
-  void set_uint_at(int offset, jint i) { *(juint*)addr_at(offset) = i; }
-  void set_ptr_at(int offset, address ptr) { *(address*)addr_at(offset) = ptr; }
-  void set_oop_at(int offset, oop o) { *(oop*)addr_at(offset) = o; }
+#define MACOS_WX_WRITE MACOS_AARCH64_ONLY(os::thread_wx_enable_write())
+  void set_char_at(int offset, char c)     { MACOS_WX_WRITE;  *addr_at(offset) = (u_char)c; }
+  void set_int_at(int offset, jint i)      { MACOS_WX_WRITE;  *(jint*)addr_at(offset) = i; }
+  void set_uint_at(int offset, jint i)     { MACOS_WX_WRITE;  *(juint*)addr_at(offset) = i; }
+  void set_ptr_at(int offset, address ptr) { MACOS_WX_WRITE;  *(address*)addr_at(offset) = ptr; }
+  void set_oop_at(int offset, oop o)       { MACOS_WX_WRITE;  *(oop*)addr_at(offset) = o; }
+#undef MACOS_WX_WRITE
 
   void wrote(int offset);
 
@@ -380,7 +382,6 @@ public:
   void set_jump_destination(address dest);
 
   static void replace_mt_safe(address instr_addr, address code_buffer);
-  static void verify();
 };
 
 inline NativeGeneralJump* nativeGeneralJump_at(address address) {

src/hotspot/cpu/aarch64/register_aarch64.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2025, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, 2021, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *

src/hotspot/cpu/aarch64/sharedRuntime_aarch64.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, 2021, Red Hat Inc. All rights reserved.
  * Copyright (c) 2021, Azul Systems, Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
@@ -722,22 +722,20 @@ void SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm,
 
   // Class initialization barrier for static methods
   entry_address[AdapterBlob::C2I_No_Clinit_Check] = nullptr;
-  if (VM_Version::supports_fast_class_init_checks()) {
-    Label L_skip_barrier;
+  assert(VM_Version::supports_fast_class_init_checks(), "sanity");
+  Label L_skip_barrier;
 
-    { // Bypass the barrier for non-static methods
-      __ ldrh(rscratch1, Address(rmethod, Method::access_flags_offset()));
-      __ andsw(zr, rscratch1, JVM_ACC_STATIC);
-      __ br(Assembler::EQ, L_skip_barrier); // non-static
-    }
+  // Bypass the barrier for non-static methods
+  __ ldrh(rscratch1, Address(rmethod, Method::access_flags_offset()));
+  __ andsw(zr, rscratch1, JVM_ACC_STATIC);
+  __ br(Assembler::EQ, L_skip_barrier); // non-static
 
-    __ load_method_holder(rscratch2, rmethod);
-    __ clinit_barrier(rscratch2, rscratch1, &L_skip_barrier);
-    __ far_jump(RuntimeAddress(SharedRuntime::get_handle_wrong_method_stub()));
+  __ load_method_holder(rscratch2, rmethod);
+  __ clinit_barrier(rscratch2, rscratch1, &L_skip_barrier);
+  __ far_jump(RuntimeAddress(SharedRuntime::get_handle_wrong_method_stub()));
 
-    __ bind(L_skip_barrier);
-    entry_address[AdapterBlob::C2I_No_Clinit_Check] = __ pc();
-  }
+  __ bind(L_skip_barrier);
+  entry_address[AdapterBlob::C2I_No_Clinit_Check] = __ pc();
 
   BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
   bs->c2i_entry_barrier(masm);
@@ -1508,7 +1506,8 @@ nmethod* SharedRuntime::generate_native_wrapper(MacroAssembler* masm,
   // SVC, HVC, or SMC.  Make it a NOP.
   __ nop();
 
-  if (VM_Version::supports_fast_class_init_checks() && method->needs_clinit_barrier()) {
+  if (method->needs_clinit_barrier()) {
+    assert(VM_Version::supports_fast_class_init_checks(), "sanity");
     Label L_skip_barrier;
     __ mov_metadata(rscratch2, method->method_holder()); // InstanceKlass*
     __ clinit_barrier(rscratch2, rscratch1, &L_skip_barrier);

src/hotspot/cpu/aarch64/smallRegisterMap_aarch64.inline.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2025, 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

src/hotspot/cpu/aarch64/stackChunkFrameStream_aarch64.inline.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2025, 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

src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp

@@ -6081,14 +6081,18 @@ class StubGenerator: public StubCodeGenerator {
   // static int implKyber12To16(
   //         byte[] condensed, int index, short[] parsed, int parsedLength) {}
   //
-  // (parsedLength or (parsedLength - 48) must be divisible by 64.)
+  // we assume that parsed and condensed are allocated such that for
+  // n = (parsedLength + 63) / 64
+  // n blocks of 96 bytes of input can be processed, i.e.
+  // index + n * 96 <= condensed.length and
+  // n * 64 <= parsed.length
   //
   // condensed (byte[]) = c_rarg0
   // condensedIndex = c_rarg1
-  // parsed (short[112 or 256]) = c_rarg2
-  // parsedLength (112 or 256) = c_rarg3
+  // parsed (short[]) = c_rarg2
+  // parsedLength = c_rarg3
   address generate_kyber12To16() {
-    Label L_F00, L_loop, L_end;
+    Label L_F00, L_loop;
 
     __ align(CodeEntryAlignment);
     StubId stub_id = StubId::stubgen_kyber12To16_id;
@@ -6209,75 +6213,8 @@ class StubGenerator: public StubCodeGenerator {
     vs_st2_post(vs_front(vb), __ T8H, parsed);
 
     __ sub(parsedLength, parsedLength, 64);
-    __ cmp(parsedLength, (u1)64);
-    __ br(Assembler::GE, L_loop);
-    __ cbz(parsedLength, L_end);
-
-    // if anything is left it should be a final 72 bytes of input
-    // i.e. a final 48 12-bit values. so we handle this by loading
-    // 48 bytes into all 16B lanes of front(vin) and only 24
-    // bytes into the lower 8B lane of back(vin)
-    vs_ld3_post(vs_front(vin), __ T16B, condensed);
-    vs_ld3(vs_back(vin), __ T8B, condensed);
-
-    // Expand vin[0] into va[0:1], and vin[1] into va[2:3] and va[4:5]
-    // n.b. target elements 2 and 3 of va duplicate elements 4 and
-    // 5 and target element 2 of vb duplicates element 4.
-    __ ushll(va[0], __ T8H, vin[0], __ T8B, 0);
-    __ ushll2(va[1], __ T8H, vin[0], __ T16B, 0);
-    __ ushll(va[2], __ T8H, vin[1], __ T8B, 0);
-    __ ushll2(va[3], __ T8H, vin[1], __ T16B, 0);
-    __ ushll(va[4], __ T8H, vin[1], __ T8B, 0);
-    __ ushll2(va[5], __ T8H, vin[1], __ T16B, 0);
-
-    // This time expand just the lower 8 lanes
-    __ ushll(vb[0], __ T8H, vin[3], __ T8B, 0);
-    __ ushll(vb[2], __ T8H, vin[4], __ T8B, 0);
-    __ ushll(vb[4], __ T8H, vin[4], __ T8B, 0);
-
-    // shift lo byte of copy 1 of the middle stripe into the high byte
-    __ shl(va[2], __ T8H, va[2], 8);
-    __ shl(va[3], __ T8H, va[3], 8);
-    __ shl(vb[2], __ T8H, vb[2], 8);
-
-    // expand vin[2] into va[6:7] and lower 8 lanes of vin[5] into
-    // vb[6] pre-shifted by 4 to ensure top bits of the input 12-bit
-    // int are in bit positions [4..11].
-    __ ushll(va[6], __ T8H, vin[2], __ T8B, 4);
-    __ ushll2(va[7], __ T8H, vin[2], __ T16B, 4);
-    __ ushll(vb[6], __ T8H, vin[5], __ T8B, 4);
-
-    // mask hi 4 bits of each 1st 12-bit int in pair from copy1 and
-    // shift lo 4 bits of each 2nd 12-bit int in pair to bottom of
-    // copy2
-    __ andr(va[2], __ T16B, va[2], v31);
-    __ andr(va[3], __ T16B, va[3], v31);
-    __ ushr(va[4], __ T8H, va[4], 4);
-    __ ushr(va[5], __ T8H, va[5], 4);
-    __ andr(vb[2], __ T16B, vb[2], v31);
-    __ ushr(vb[4], __ T8H, vb[4], 4);
-
-
-
-    // sum hi 4 bits and lo 8 bits of each 1st 12-bit int in pair and
-    // hi 8 bits plus lo 4 bits of each 2nd 12-bit int in pair
-
-    // n.b. ordering ensures: i) inputs are consumed before they are
-    // overwritten ii) order of 16-bit results across succsessive
-    // pairs of vectors in va and then lower half of vb reflects order
-    // of corresponding 12-bit inputs
-    __ addv(va[0], __ T8H, va[0], va[2]);
-    __ addv(va[2], __ T8H, va[1], va[3]);
-    __ addv(va[1], __ T8H, va[4], va[6]);
-    __ addv(va[3], __ T8H, va[5], va[7]);
-    __ addv(vb[0], __ T8H, vb[0], vb[2]);
-    __ addv(vb[1], __ T8H, vb[4], vb[6]);
-
-    // store 48 results interleaved as shorts
-    vs_st2_post(vs_front(va), __ T8H, parsed);
-    vs_st2_post(vs_front(vs_front(vb)), __ T8H, parsed);
-
-    __ BIND(L_end);
+    __ cmp(parsedLength, (u1)0);
+    __ br(Assembler::GT, L_loop);
 
     __ leave(); // required for proper stackwalking of RuntimeStub frame
     __ mov(r0, zr); // return 0
@@ -11805,7 +11742,9 @@ class StubGenerator: public StubCodeGenerator {
     }
 #endif
 
-    StubRoutines::_unsafe_setmemory = generate_unsafe_setmemory();
+    if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_setMemory)) {
+      StubRoutines::_unsafe_setmemory = generate_unsafe_setmemory();
+    }
 
     StubRoutines::aarch64::set_completed(); // Inidicate that arraycopy and zero_blocks stubs are generated
   }

src/hotspot/cpu/aarch64/templateTable_aarch64.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -2290,7 +2290,8 @@ void TemplateTable::resolve_cache_and_index_for_method(int byte_no,
   __ subs(zr, temp, (int) code);  // have we resolved this bytecode?
 
   // Class initialization barrier for static methods
-  if (VM_Version::supports_fast_class_init_checks() && bytecode() == Bytecodes::_invokestatic) {
+  if (bytecode() == Bytecodes::_invokestatic) {
+    assert(VM_Version::supports_fast_class_init_checks(), "sanity");
     __ br(Assembler::NE, L_clinit_barrier_slow);
     __ ldr(temp, Address(Rcache, in_bytes(ResolvedMethodEntry::method_offset())));
     __ load_method_holder(temp, temp);
@@ -2340,8 +2341,8 @@ void TemplateTable::resolve_cache_and_index_for_field(int byte_no,
   __ subs(zr, temp, (int) code);  // have we resolved this bytecode?
 
   // Class initialization barrier for static fields
-  if (VM_Version::supports_fast_class_init_checks() &&
-      (bytecode() == Bytecodes::_getstatic || bytecode() == Bytecodes::_putstatic)) {
+  if (bytecode() == Bytecodes::_getstatic || bytecode() == Bytecodes::_putstatic) {
+    assert(VM_Version::supports_fast_class_init_checks(), "sanity");
     const Register field_holder = temp;
 
     __ br(Assembler::NE, L_clinit_barrier_slow);
@@ -3369,7 +3370,7 @@ void TemplateTable::invokevirtual_helper(Register index,
   __ load_klass(r0, recv);
 
   // profile this call
-  __ profile_virtual_call(r0, rlocals, r3);
+  __ profile_virtual_call(r0, rlocals);
 
   // get target Method & entry point
   __ lookup_virtual_method(r0, index, method);
@@ -3499,7 +3500,7 @@ void TemplateTable::invokeinterface(int byte_no) {
                              /*return_method=*/false);
 
   // profile this call
-  __ profile_virtual_call(r3, r13, r19);
+  __ profile_virtual_call(r3, r13);
 
   // Get declaring interface class from method, and itable index
 

src/hotspot/cpu/aarch64/vm_version_aarch64.cpp

@@ -201,16 +201,14 @@ void VM_Version::initialize() {
     }
   }
 
-  // Cortex A53
-  if (_cpu == CPU_ARM && model_is(0xd03)) {
+  if (_cpu == CPU_ARM && model_is(CPU_MODEL_ARM_CORTEX_A53)) {
     set_feature(CPU_A53MAC);
     if (FLAG_IS_DEFAULT(UseSIMDForArrayEquals)) {
       FLAG_SET_DEFAULT(UseSIMDForArrayEquals, false);
     }
   }
 
-  // Cortex A73
-  if (_cpu == CPU_ARM && model_is(0xd09)) {
+  if (_cpu == CPU_ARM && model_is(CPU_MODEL_ARM_CORTEX_A73)) {
     if (FLAG_IS_DEFAULT(SoftwarePrefetchHintDistance)) {
       FLAG_SET_DEFAULT(SoftwarePrefetchHintDistance, -1);
     }
@@ -220,16 +218,11 @@ void VM_Version::initialize() {
     }
   }
 
-  // Neoverse
-  //   N1: 0xd0c
-  //   N2: 0xd49
-  //   N3: 0xd8e
-  //   V1: 0xd40
-  //   V2: 0xd4f
-  //   V3: 0xd84
-  if (_cpu == CPU_ARM && (model_is(0xd0c) || model_is(0xd49) ||
-                          model_is(0xd40) || model_is(0xd4f) ||
-                          model_is(0xd8e) || model_is(0xd84))) {
+  if (_cpu == CPU_ARM &&
+      model_is_in({ CPU_MODEL_ARM_NEOVERSE_N1, CPU_MODEL_ARM_NEOVERSE_V1,
+                    CPU_MODEL_ARM_NEOVERSE_N2, CPU_MODEL_ARM_NEOVERSE_V2,
+                    CPU_MODEL_ARM_NEOVERSE_N3, CPU_MODEL_ARM_NEOVERSE_V3,
+                    CPU_MODEL_ARM_NEOVERSE_V3AE })) {
     if (FLAG_IS_DEFAULT(UseSIMDForMemoryOps)) {
       FLAG_SET_DEFAULT(UseSIMDForMemoryOps, true);
     }
@@ -261,12 +254,9 @@ void VM_Version::initialize() {
     FLAG_SET_DEFAULT(UseCRC32, false);
   }
 
-  // Neoverse
-  //   V1: 0xd40
-  //   V2: 0xd4f
-  //   V3: 0xd84
   if (_cpu == CPU_ARM &&
-      (model_is(0xd40) || model_is(0xd4f) || model_is(0xd84))) {
+      model_is_in({ CPU_MODEL_ARM_NEOVERSE_V1, CPU_MODEL_ARM_NEOVERSE_V2,
+                    CPU_MODEL_ARM_NEOVERSE_V3, CPU_MODEL_ARM_NEOVERSE_V3AE })) {
     if (FLAG_IS_DEFAULT(UseCryptoPmullForCRC32)) {
       FLAG_SET_DEFAULT(UseCryptoPmullForCRC32, true);
     }
@@ -632,6 +622,22 @@ void VM_Version::initialize() {
 
   check_virtualizations();
 
+#ifdef __APPLE__
+  DefaultWXWriteMode = UseOldWX ? WXWrite : WXArmedForWrite;
+
+  if (TraceWXHealing) {
+    if (pthread_jit_write_protect_supported_np()) {
+      tty->print_cr("### TraceWXHealing is in use");
+      if (StressWXHealing) {
+        tty->print_cr("### StressWXHealing is in use");
+      }
+    } else {
+      tty->print_cr("WX Healing is not in use because MAP_JIT write protection "
+                    "does not work on this system.");
+    }
+  }
+#endif
+
   // Sync SVE related CPU features with flags
   if (UseSVE < 2) {
     clear_feature(CPU_SVE2);

src/hotspot/cpu/aarch64/vm_version_aarch64.hpp

@@ -30,6 +30,8 @@
 #include "runtime/abstract_vm_version.hpp"
 #include "utilities/sizes.hpp"
 
+#include <initializer_list>
+
 class stringStream;
 
 #define BIT_MASK(flag) (1ULL<<(flag))
@@ -112,14 +114,26 @@ public:
     CPU_APPLE     = 'a',
   };
 
-enum Ampere_CPU_Model {
+  enum Ampere_CPU_Model {
     CPU_MODEL_EMAG      = 0x0,   /* CPU implementer is CPU_AMCC */
     CPU_MODEL_ALTRA     = 0xd0c, /* CPU implementer is CPU_ARM, Neoverse N1 */
     CPU_MODEL_ALTRAMAX  = 0xd0c, /* CPU implementer is CPU_ARM, Neoverse N1 */
     CPU_MODEL_AMPERE_1  = 0xac3, /* CPU implementer is CPU_AMPERE */
     CPU_MODEL_AMPERE_1A = 0xac4, /* CPU implementer is CPU_AMPERE */
     CPU_MODEL_AMPERE_1B = 0xac5  /* AMPERE_1B core Implements ARMv8.7 with CSSC, MTE, SM3/SM4 extensions */
-};
+  };
+
+  enum ARM_CPU_Model {
+    CPU_MODEL_ARM_CORTEX_A53    = 0xd03,
+    CPU_MODEL_ARM_CORTEX_A73    = 0xd09,
+    CPU_MODEL_ARM_NEOVERSE_N1   = 0xd0c,
+    CPU_MODEL_ARM_NEOVERSE_V1   = 0xd40,
+    CPU_MODEL_ARM_NEOVERSE_N2   = 0xd49,
+    CPU_MODEL_ARM_NEOVERSE_V2   = 0xd4f,
+    CPU_MODEL_ARM_NEOVERSE_V3AE = 0xd83,
+    CPU_MODEL_ARM_NEOVERSE_V3   = 0xd84,
+    CPU_MODEL_ARM_NEOVERSE_N3   = 0xd8e,
+  };
 
 #define CPU_FEATURE_FLAGS(decl)               \
     decl(FP,            fp,            0)     \
@@ -181,6 +195,15 @@ enum Ampere_CPU_Model {
     return _model == cpu_model || _model2 == cpu_model;
   }
 
+  static bool model_is_in(std::initializer_list<int> cpu_models) {
+    for (const int& cpu_model : cpu_models) {
+      if (_model == cpu_model || _model2 == cpu_model) {
+        return true;
+      }
+    }
+    return false;
+  }
+
   static bool is_zva_enabled() { return 0 <= _zva_length; }
   static int zva_length() {
     assert(is_zva_enabled(), "ZVA not available");

src/hotspot/cpu/arm/assembler_arm_32.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2008, 2025, 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