Android: Add enable_jdk_library_desugaring GN arg

When enabled, it will cause some jdk library symbols to be desugared
when dexing, and adds an extra classes.dex file to every .apk and .aab.

Bug: 1056751
Change-Id: Ib51b00f93fbe6120d44553782ce56ae60f7e6bb9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2144357
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Peter Wen <wnwen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#761957}

PRESUBMIT.py

@@ -1323,6 +1323,7 @@ _ANDROID_SPECIFIC_PYDEPS_FILES = [
     'build/android/gyp/desugar.pydeps',
     'build/android/gyp/dexsplitter.pydeps',
     'build/android/gyp/dex.pydeps',
+    'build/android/gyp/dex_jdk_libs.pydeps',
     'build/android/gyp/dist_aar.pydeps',
     'build/android/gyp/filter_zip.pydeps',
     'build/android/gyp/gcc_preprocess.pydeps',

build/android/BUILD.gn

@@ -16,6 +16,13 @@ if (enable_java_templates) {
     create_cache = true
   }
 
+  if (enable_jdk_library_desugaring) {
+    dex_jdk_libs("all_jdk_libs") {
+      output = "$target_out_dir/$target_name.l8.dex"
+      min_sdk_version = default_min_sdk_version
+    }
+  }
+
   # Write to a file some GN vars that are useful to scripts that use the output
   # directory. Format is chosen as easliy importable by both python and bash.
   _lines = [

build/android/gyp/apkbuilder.py

@@ -58,6 +58,9 @@ def _ParseArgs(args):
                       default='apk', help='Specify output format.')
   parser.add_argument('--dex-file',
                       help='Path to the classes.dex to use')
+  parser.add_argument(
+      '--jdk-libs-dex-file',
+      help='Path to classes.dex created by dex_jdk_libs.py')
   parser.add_argument('--uncompress-dex', action='store_true',
                       help='Store .dex files uncompressed in the APK')
   parser.add_argument('--native-libs',
@@ -425,19 +428,29 @@ def main(args):
       if options.dex_file:
         with open(options.dex_file) as dex_file_obj:
           if options.dex_file.endswith('.dex'):
+            max_dex_number = 1
             # This is the case for incremental_install=true.
             add_to_zip(
                 apk_dex_dir + 'classes.dex',
                 dex_file_obj.read(),
                 compress=not options.uncompress_dex)
           else:
+            max_dex_number = 0
             with zipfile.ZipFile(dex_file_obj) as dex_zip:
               for dex in (d for d in dex_zip.namelist() if d.endswith('.dex')):
+                max_dex_number += 1
                 add_to_zip(
                     apk_dex_dir + dex,
                     dex_zip.read(dex),
                     compress=not options.uncompress_dex)
 
+      if options.jdk_libs_dex_file:
+        with open(options.jdk_libs_dex_file) as dex_file_obj:
+          add_to_zip(
+              apk_dex_dir + 'classes{}.dex'.format(max_dex_number + 1),
+              dex_file_obj.read(),
+              compress=not options.uncompress_dex)
+
       # 4. Native libraries.
       logging.debug('Adding lib/')
       added_libs = _AddNativeLibraries(

build/android/gyp/dex.py

@@ -68,6 +68,8 @@ def _ParseArgs(args):
       '--bootclasspath',
       action='append',
       help='GN-list of bootclasspath. Needed for --desugar')
+  parser.add_argument(
+      '--desugar-jdk-libs-json', help='Path to desugar_jdk_libs.json.')
   parser.add_argument(
       '--classpath',
       action='append',
@@ -498,6 +500,8 @@ def main(args):
     input_paths += options.classpath
     input_paths += options.bootclasspath
 
+  if options.desugar_jdk_libs_json:
+    dex_cmd += ['--desugared-lib', options.desugar_jdk_libs_json]
   if options.force_enable_assertions:
     dex_cmd += ['--force-enable-assertions']
 

build/android/gyp/dex_jdk_libs.py

+#!/usr/bin/env python
+#
+# Copyright 2020 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import argparse
+import os
+import shutil
+import subprocess
+import sys
+import zipfile
+
+from util import build_utils
+
+
+def _ParseArgs(args):
+  args = build_utils.ExpandFileArgs(args)
+  parser = argparse.ArgumentParser()
+
+  parser.add_argument('--output', required=True, help='Dex output path.')
+  parser.add_argument('--r8-path', required=True, help='Path to R8 jar.')
+  parser.add_argument(
+      '--desugar-jdk-libs-json', help='Path to desugar_jdk_libs.json.')
+  parser.add_argument(
+      '--desugar-jdk-libs-jar', help='Path to desugar_jdk_libs.jar.')
+  parser.add_argument('--min-api', help='minSdkVersion', required=True)
+  options = parser.parse_args(args)
+  return options
+
+
+def main(args):
+  options = _ParseArgs(args)
+
+  # TODO(agrieve): Spews a lot of stderr about missing classes.
+  with build_utils.TempDir() as tmp_dir:
+    cmd = [
+        build_utils.JAVA_PATH,
+        '-jar',
+        options.r8_path,
+        'l8',
+        '--min-api',
+        options.min_api,
+        #'--lib', build_utils.JAVA_HOME,
+        '--desugared-lib',
+        options.desugar_jdk_libs_json,
+        '--output',
+        tmp_dir,
+        options.desugar_jdk_libs_jar
+    ]
+    subprocess.check_output(cmd, stderr=subprocess.STDOUT)
+
+    if os.path.exists(os.path.join(tmp_dir, 'classes2.dex')):
+      raise Exception('Achievement unlocked: desugar_jdk_libs is multidex!')
+    shutil.move(os.path.join(tmp_dir, 'classes.dex'), options.output)
+
+
+if __name__ == '__main__':
+  main(sys.argv[1:])

build/android/gyp/dex_jdk_libs.pydeps

+# Generated by running:
+#   build/print_python_deps.py --root build/android/gyp --output build/android/gyp/dex_jdk_libs.pydeps build/android/gyp/dex_jdk_libs.py
+../../gn_helpers.py
+dex_jdk_libs.py
+util/__init__.py
+util/build_utils.py

build/android/gyp/proguard.py

@@ -109,6 +109,8 @@ def _ParseOptions():
   group = parser.add_mutually_exclusive_group(required=True)
   group.add_argument('--proguard-path', help='Path to the proguard.jar to use.')
   group.add_argument('--r8-path', help='Path to the R8.jar to use.')
+  parser.add_argument(
+      '--desugar-jdk-libs-json', help='Path to desugar_jdk_libs.json.')
   parser.add_argument(
       '--input-paths', required=True, help='GN-list of .jar files to optimize.')
   parser.add_argument(
@@ -235,11 +237,8 @@ def _OptimizeWithR8(options,
         tmp_mapping_path,
     ]
 
-    for lib in libraries:
-      cmd += ['--lib', lib]
-
-    for config_file in config_paths:
-      cmd += ['--pg-conf', config_file]
+    if options.desugar_jdk_libs_json:
+      cmd += ['--desugared-lib', options.desugar_jdk_libs_json]
 
     if options.min_api:
       cmd += ['--min-api', options.min_api]
@@ -247,6 +246,12 @@ def _OptimizeWithR8(options,
     if options.force_enable_assertions:
       cmd += ['--force-enable-assertions']
 
+    for lib in libraries:
+      cmd += ['--lib', lib]
+
+    for config_file in config_paths:
+      cmd += ['--pg-conf', config_file]
+
     if options.main_dex_rules_path:
       for main_dex_rule in options.main_dex_rules_path:
         cmd += ['--main-dex-rules', main_dex_rule]

build/config/android/config.gni

@@ -237,6 +237,10 @@ if (is_android || is_chromeos) {
     # Desugar lambdas and interfaces methods using Desugar.jar rather than
     # D8/R8. D8/R8 will still be used for backported method desugaring.
     enable_bazel_desugar = true
+
+    # Enables Java library desugaring.
+    # This will cause an extra 1MB classes.dex file to appear in every apk.
+    enable_jdk_library_desugaring = false
   }
 
   # Path to where selected build variables are written to.

build/config/android/internal_rules.gni

@@ -55,6 +55,8 @@ _java_lib_exceptions =
     ]
 
 _r8_path = "//third_party/r8/lib/r8.jar"
+_desugar_jdk_libs_json = "//third_party/r8/desugar_jdk_libs.json"
+_desugar_jdk_libs_jar = "//third_party/android_deps/libs/com_android_tools_desugar_jdk_libs/desugar_jdk_libs-1.0.5.jar"
 
 _dexdump_path = "$android_sdk_build_tools/dexdump"
 _dexlayout_path = "//third_party/android_build_tools/art/dexlayout"
@@ -1067,6 +1069,13 @@ if (enable_java_templates) {
           rebase_path(_r8_path, root_build_dir),
         ]
         inputs += [ _r8_path ]
+        if (enable_jdk_library_desugaring) {
+          args += [
+            "--desugar-jdk-libs-json",
+            rebase_path(_desugar_jdk_libs_json, root_build_dir),
+          ]
+          inputs += [ _desugar_jdk_libs_json ]
+        }
       } else {
         _proguard_jar_path = invoker.proguard_jar_path
         args += [
@@ -1455,6 +1464,15 @@ if (enable_java_templates) {
 
         if (_enable_desugar) {
           args += [ "--desugar" ]
+
+          # Passing the flag for dex merging causes invalid dex files to be created.
+          if (enable_jdk_library_desugaring && !_is_dex_merging) {
+            inputs += [ _desugar_jdk_libs_json ]
+            args += [
+              "--desugar-jdk-libs-json",
+              rebase_path(_desugar_jdk_libs_json, root_build_dir),
+            ]
+          }
         }
         if (_desugar_needs_classpath) {
           args += [
@@ -1482,6 +1500,32 @@ if (enable_java_templates) {
     }
   }
 
+  # Variables
+  #   output: Path to output ".l8.dex".
+  #   min_sdk_version: The minimum Android SDK version this target supports.
+  template("dex_jdk_libs") {
+    action_with_pydeps(target_name) {
+      script = "//build/android/gyp/dex_jdk_libs.py"
+      inputs = [
+        _r8_path,
+        _desugar_jdk_libs_json,
+        _desugar_jdk_libs_jar,
+      ]
+      outputs = [ invoker.output ]
+      args = [
+        "--r8-path",
+        rebase_path(_r8_path, root_build_dir),
+        "--desugar-jdk-libs-json",
+        rebase_path(_desugar_jdk_libs_json, root_build_dir),
+        "--desugar-jdk-libs-jar",
+        rebase_path(_desugar_jdk_libs_jar, root_build_dir),
+        "--output",
+        rebase_path(invoker.output, root_build_dir),
+        "--min-api=${invoker.min_sdk_version}",
+      ]
+    }
+  }
+
   template("jacoco_instr") {
     action_with_pydeps(target_name) {
       forward_variables_from(invoker,
@@ -2555,6 +2599,7 @@ if (enable_java_templates) {
   #       asset information.
   #   deps: Specifies the dependencies of this target.
   #   dex_path: Path to classes.dex file to include (optional).
+  #   jdk_libs_dex: Path to classes.dex for desugar_jdk_libs.
   #   packaged_resources_path: Path to .ap_ to use.
   #   output_apk_path: Output path for the generated .apk.
   #   min_sdk_version: The minimum Android SDK version this target supports.
@@ -2655,8 +2700,18 @@ if (enable_java_templates) {
         args += [ "--java-resources=@FileArg($_rebased_build_config:java_resources_jars)" ]
       }
       if (defined(invoker.dex_path)) {
-        _rebased_dex_path = rebase_path(invoker.dex_path, root_build_dir)
-        args += [ "--dex-file=$_rebased_dex_path" ]
+        inputs += [ invoker.dex_path ]
+        args += [
+          "--dex-file",
+          rebase_path(invoker.dex_path, root_build_dir),
+        ]
+      }
+      if (defined(invoker.jdk_libs_dex)) {
+        inputs += [ invoker.jdk_libs_dex ]
+        args += [
+          "--jdk-libs-dex-file",
+          rebase_path(invoker.jdk_libs_dex, root_build_dir),
+        ]
       }
       if ((defined(invoker.loadable_modules) &&
            invoker.loadable_modules != []) ||
@@ -3897,6 +3952,19 @@ template("create_android_app_bundle_module") {
         ]
       }
     }
+
+    # TODO(https://crbug.com/1056751): Add support for proguarding jdk libs.
+    if (enable_jdk_library_desugaring && invoker.module_name == "base") {
+      _all_jdk_libs = "//build/android:all_jdk_libs"
+      deps += [ _all_jdk_libs ]
+      _jdk_libs_dex = get_label_info(_all_jdk_libs, "target_out_dir") +
+                      "/all_jdk_libs.l8.dex"
+      inputs += [ _jdk_libs_dex ]
+      args += [
+        "--jdk-libs-dex-file",
+        rebase_path(_jdk_libs_dex, root_build_dir),
+      ]
+    }
   }
 }
 

build/config/android/rules.gni

@@ -3184,6 +3184,14 @@ if (enable_java_templates) {
 
         deps = _deps + [ ":$_build_config_target" ]
 
+        # TODO(https://crbug.com/1056751): Add support for proguarding jdk libs.
+        if (enable_jdk_library_desugaring) {
+          _all_jdk_libs = "//build/android:all_jdk_libs"
+          deps += [ _all_jdk_libs ]
+          jdk_libs_dex = get_label_info(_all_jdk_libs, "target_out_dir") +
+                         "/all_jdk_libs.l8.dex"
+        }
+
         if (_incremental_apk) {
           _dex_target =
               "//build/android/incremental_install:bootstrap_java__dex"

third_party/r8/README.chromium

@@ -7,6 +7,14 @@ License File: NOT_SHIPPED
 Security Critical: no
 
 Description:
+lib/r8.jar
+ - Contains R8 (proguard replacement) as well as D8 (dexer).
+desugar_jdk_libs.json
+ - Configuration for Java library desugaring.
+ - Taken from fa020a2164ea087c1d79c8c6b0f435f199f8d196
+ - This file should be kept in sync with the prebuilt shims that live
+   at //third_party/android_deps/libs/com_android_tools_desugar_jdk_libs.
+
 R8 is a proguard-like optimizer that also has the ability to dex.
 
 Local Modifications:
@@ -31,6 +39,9 @@ cp r8.jar $CHROMIUM_SRC/third_party/r8/libs/r8.jar
 # Upload to CIPD:
 cipd create --pkg-def cipd.yaml # Make note of the instance ID
 
+# Copy over desugar config:
+cp src/library_desugar/desugar_jdk_libs.json $CHROMIUM_SRC/third_party/r8
+
 # Manually update:
 * README.chromium (version number via "java -jar lib/r8.jar --version")
 * //DEPS (instance ID output by cipd create)

third_party/r8/desugar_jdk_libs.json

+{
+  "configuration_format_version": 3,
+  "version": "0.11.1",
+  "required_compilation_api_level": 26,
+  "synthesized_library_classes_package_prefix": "j$.",
+  "library_flags": [
+    {
+      "api_level_below_or_equal": 25,
+      "rewrite_prefix": {
+        "j$.time.": "java.time.",
+        "java.time.": "j$.time.",
+        "java.util.Desugar": "j$.util.Desugar"
+      },
+      "backport": {
+        "java.lang.Double8": "java.lang.Double",
+        "java.lang.Integer8": "java.lang.Integer",
+        "java.lang.Long8": "java.lang.Long",
+        "java.lang.Math8": "java.lang.Math"
+      },
+      "retarget_lib_member": {
+        "java.util.Date#toInstant": "java.util.DesugarDate",
+        "java.util.GregorianCalendar#toZonedDateTime": "java.util.DesugarGregorianCalendar"
+      }
+    },
+    {
+      "api_level_below_or_equal": 23,
+      "rewrite_prefix": {
+        "j$.util.Optional": "java.util.Optional",
+        "j$.util.LongSummaryStatistics": "java.util.LongSummaryStatistics",
+        "j$.util.IntSummaryStatistics": "java.util.IntSummaryStatistics",
+        "j$.util.DoubleSummaryStatistics": "java.util.DoubleSummaryStatistics",
+        "java.util.stream.": "j$.util.stream.",
+        "java.util.function.": "j$.util.function.",
+        "java.util.Comparators": "j$.util.Comparators",
+        "java.util.DoubleSummaryStatistics": "j$.util.DoubleSummaryStatistics",
+        "java.util.IntSummaryStatistics": "j$.util.IntSummaryStatistics",
+        "java.util.LongSummaryStatistics": "j$.util.LongSummaryStatistics",
+        "java.util.Objects": "j$.util.Objects",
+        "java.util.Optional": "j$.util.Optional",
+        "java.util.PrimitiveIterator": "j$.util.PrimitiveIterator",
+        "java.util.SortedSet$1": "j$.util.SortedSet$1",
+        "java.util.Spliterator": "j$.util.Spliterator",
+        "java.util.StringJoiner": "j$.util.StringJoiner",
+        "java.util.Tripwire": "j$.util.Tripwire",
+        "java.util.concurrent.DesugarUnsafe": "j$.util.concurrent.DesugarUnsafe",
+        "java.util.concurrent.ThreadLocalRandom": "j$.util.concurrent.ThreadLocalRandom",
+        "java.util.concurrent.atomic.DesugarAtomic": "j$.util.concurrent.atomic.DesugarAtomic",
+        "java.util.concurrent.ConcurrentHashMap": "j$.util.concurrent.ConcurrentHashMap"
+      },
+      "retarget_lib_member": {
+        "java.util.Arrays#stream": "java.util.DesugarArrays",
+        "java.util.Arrays#spliterator": "java.util.DesugarArrays",
+        "java.util.LinkedHashSet#spliterator": "java.util.DesugarLinkedHashSet"
+      },
+      "dont_rewrite": [
+        "java.util.Iterator#remove"
+      ],
+      "emulate_interface": {
+        "java.lang.Iterable": "j$.lang.Iterable",
+        "java.util.Map$Entry": "j$.util.Map$Entry",
+        "java.util.Collection": "j$.util.Collection",
+        "java.util.Map": "j$.util.Map",
+        "java.util.Iterator": "j$.util.Iterator",
+        "java.util.Comparator": "j$.util.Comparator",
+        "java.util.List": "j$.util.List",
+        "java.util.SortedSet": "j$.util.SortedSet",
+        "java.util.Set": "j$.util.Set",
+        "java.util.concurrent.ConcurrentMap": "j$.util.concurrent.ConcurrentMap"
+      },
+      "custom_conversion": {
+        "java.util.Optional": "java.util.OptionalConversions",
+        "java.util.OptionalDouble": "java.util.OptionalConversions",
+        "java.util.OptionalInt": "java.util.OptionalConversions",
+        "java.util.OptionalLong": "java.util.OptionalConversions",
+        "java.util.LongSummaryStatistics": "java.util.LongSummaryStatisticsConversions",
+        "java.util.IntSummaryStatistics": "java.util.IntSummaryStatisticsConversions",
+        "java.util.DoubleSummaryStatistics": "java.util.DoubleSummaryStatisticsConversions"
+      }
+    }
+  ],
+  "program_flags": [
+    {
+      "api_level_below_or_equal": 25,
+      "rewrite_prefix": {
+        "java.time.": "j$.time.",
+        "java.util.Desugar": "j$.util.Desugar"
+      },
+      "retarget_lib_member": {
+        "java.util.Calendar#toInstant": "java.util.DesugarCalendar",
+        "java.util.Date#from": "java.util.DesugarDate",
+        "java.util.Date#toInstant": "java.util.DesugarDate",
+        "java.util.GregorianCalendar#from": "java.util.DesugarGregorianCalendar",
+        "java.util.GregorianCalendar#toZonedDateTime": "java.util.DesugarGregorianCalendar"
+      },
+      "custom_conversion": {
+        "java.time.ZonedDateTime": "java.time.TimeConversions",
+        "java.time.LocalDate": "java.time.TimeConversions",
+        "java.time.Duration": "java.time.TimeConversions",
+        "java.time.ZoneId": "java.time.TimeConversions",
+        "java.time.MonthDay": "java.time.TimeConversions",
+        "java.time.Instant": "java.time.TimeConversions"
+      }
+    },
+    {
+      "api_level_below_or_equal": 23,
+      "rewrite_prefix": {
+        "java.util.stream.": "j$.util.stream.",
+        "java.util.function.": "j$.util.function.",
+        "java.util.DoubleSummaryStatistics": "j$.util.DoubleSummaryStatistics",
+        "java.util.IntSummaryStatistics": "j$.util.IntSummaryStatistics",
+        "java.util.LongSummaryStatistics": "j$.util.LongSummaryStatistics",
+        "java.util.Optional": "j$.util.Optional",
+        "java.util.PrimitiveIterator": "j$.util.PrimitiveIterator",
+        "java.util.Spliterator": "j$.util.Spliterator",
+        "java.util.StringJoiner": "j$.util.StringJoiner",
+        "java.util.concurrent.ThreadLocalRandom": "j$.util.concurrent.ThreadLocalRandom",
+        "java.util.concurrent.atomic.DesugarAtomic": "j$.util.concurrent.atomic.DesugarAtomic",
+        "java.util.concurrent.ConcurrentHashMap": "j$.util.concurrent.ConcurrentHashMap"
+      },
+      "retarget_lib_member": {
+        "java.util.Arrays#stream": "java.util.DesugarArrays",
+        "java.util.Arrays#spliterator": "java.util.DesugarArrays",
+        "java.util.LinkedHashSet#spliterator": "java.util.DesugarLinkedHashSet",
+        "java.util.concurrent.atomic.AtomicInteger#getAndUpdate": "java.util.concurrent.atomic.DesugarAtomicInteger",
+        "java.util.concurrent.atomic.AtomicInteger#updateAndGet": "java.util.concurrent.atomic.DesugarAtomicInteger",
+        "java.util.concurrent.atomic.AtomicInteger#getAndAccumulate": "java.util.concurrent.atomic.DesugarAtomicInteger",
+        "java.util.concurrent.atomic.AtomicInteger#accumulateAndGet": "java.util.concurrent.atomic.DesugarAtomicInteger",
+        "java.util.concurrent.atomic.AtomicLong#getAndUpdate": "java.util.concurrent.atomic.DesugarAtomicLong",
+        "java.util.concurrent.atomic.AtomicLong#updateAndGet": "java.util.concurrent.atomic.DesugarAtomicLong",
+        "java.util.concurrent.atomic.AtomicLong#getAndAccumulate": "java.util.concurrent.atomic.DesugarAtomicLong",
+        "java.util.concurrent.atomic.AtomicLong#accumulateAndGet": "java.util.concurrent.atomic.DesugarAtomicLong",
+        "java.util.concurrent.atomic.AtomicReference#getAndUpdate": "java.util.concurrent.atomic.DesugarAtomicReference",
+        "java.util.concurrent.atomic.AtomicReference#updateAndGet": "java.util.concurrent.atomic.DesugarAtomicReference",
+        "java.util.concurrent.atomic.AtomicReference#getAndAccumulate": "java.util.concurrent.atomic.DesugarAtomicReference",
+        "java.util.concurrent.atomic.AtomicReference#accumulateAndGet": "java.util.concurrent.atomic.DesugarAtomicReference",
+        "java.util.Collections#synchronizedMap": "java.util.DesugarCollections",
+        "java.util.Collections#synchronizedSortedMap": "java.util.DesugarCollections"
+      },
+      "dont_rewrite": [
+        "java.util.Iterator#remove"
+      ],
+      "emulate_interface": {
+        "java.lang.Iterable": "j$.lang.Iterable",
+        "java.util.Map$Entry": "j$.util.Map$Entry",
+        "java.util.Collection": "j$.util.Collection",
+        "java.util.Map": "j$.util.Map",
+        "java.util.Iterator": "j$.util.Iterator",
+        "java.util.Comparator": "j$.util.Comparator",
+        "java.util.List": "j$.util.List",
+        "java.util.SortedSet": "j$.util.SortedSet",
+        "java.util.Set": "j$.util.Set",
+        "java.util.concurrent.ConcurrentMap": "j$.util.concurrent.ConcurrentMap"
+      },
+      "custom_conversion": {
+        "java.util.Optional": "java.util.OptionalConversions",
+        "java.util.OptionalDouble": "java.util.OptionalConversions",
+        "java.util.OptionalInt": "java.util.OptionalConversions",
+        "java.util.OptionalLong": "java.util.OptionalConversions",
+        "java.util.LongSummaryStatistics": "java.util.LongSummaryStatisticsConversions",
+        "java.util.IntSummaryStatistics": "java.util.IntSummaryStatisticsConversions",
+        "java.util.DoubleSummaryStatistics": "java.util.DoubleSummaryStatisticsConversions"
+      }
+    }
+  ],
+  "shrinker_config": [
+    "-keepclassmembers class j$.util.concurrent.ConcurrentHashMap$TreeBin { int lockState; }",
+    "-keepclassmembers class j$.util.concurrent.ConcurrentHashMap { int sizeCtl; int transferIndex; long baseCount; int cellsBusy; }",
+    "-keepclassmembers class j$.util.concurrent.ConcurrentHashMap$CounterCell { long value; }",
+    "-keepclassmembers enum * { public static **[] values(); public static ** valueOf(java.lang.String); }",
+    "-keeppackagenames j$",
+    "-keepclassmembers class j$.util.IntSummaryStatistics { long count; long sum; int min; int max; }",
+    "-keepclassmembers class j$.util.LongSummaryStatistics { long count; long sum; long min; long max; }",
+    "-keepclassmembers class j$.util.DoubleSummaryStatistics { long count; double sum; double min; double max; }"
+  ]
+}