diff --git a/core/Makefile b/core/Makefile
index 4959e0e..2389698 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -70,6 +70,27 @@
 	@cp -f $< $@
 endif
 
+ndk_doxygen_out := $(OUT_NDK_DOCS)
+ndk_headers := $(SOONG_OUT_DIR)/ndk/sysroot/usr/include
+ndk_docs_src_dir := frameworks/native/docs
+ndk_doxyfile := $(ndk_docs_src_dir)/Doxyfile
+ifneq ($(wildcard $(ndk_docs_src_dir)),)
+ndk_docs_srcs := $(addprefix $(ndk_docs_src_dir)/,\
+    $(call find-files-in-subdirs,$(ndk_docs_src_dir),"*",.))
+$(ndk_doxygen_out)/index.html: $(ndk_docs_srcs) $(SOONG_OUT_DIR)/ndk.timestamp
+	@mkdir -p $(ndk_doxygen_out)
+	@echo "Generating NDK docs to $(ndk_doxygen_out)"
+	@( cat $(ndk_doxyfile); \
+	    echo "INPUT=$(ndk_headers)"; \
+	    echo "HTML_OUTPUT=$(ndk_doxygen_out)" \
+	) | doxygen -
+
+# Note: Not a part of the docs target because we don't have doxygen available.
+# You can run this target locally if you have doxygen installed.
+ndk-docs: $(ndk_doxygen_out)/index.html
+.PHONY: ndk-docs
+endif
+
 # -----------------------------------------------------------------
 # property_overrides_split_enabled
 property_overrides_split_enabled :=
@@ -997,6 +1018,7 @@
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY),$(hide) echo "verity_key=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VERITY_SIGNING_KEY)" >> $(1))
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY),$(hide) echo "verity_signer_cmd=$(notdir $(VERITY_SIGNER))" >> $(1))
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY_FEC),$(hide) echo "verity_fec=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY_FEC)" >> $(1))
+$(if $(filter eng, $(TARGET_BUILD_VARIANT)),$(hide) echo "verity_disable=true" >> $(1))
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SYSTEM_VERITY_PARTITION),$(hide) echo "system_verity_block_device=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SYSTEM_VERITY_PARTITION)" >> $(1))
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VENDOR_VERITY_PARTITION),$(hide) echo "vendor_verity_block_device=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VENDOR_VERITY_PARTITION)" >> $(1))
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT),$(hide) echo "vboot=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT)" >> $(1))
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index c38059c..b5bb963 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -120,6 +120,7 @@
 LOCAL_JAR_PROCESSOR:=
 LOCAL_JAR_PROCESSOR_ARGS:=
 LOCAL_JAVACFLAGS:=
+LOCAL_JAVAC_SHARD_SIZE:=
 LOCAL_JAVA_LANGUAGE_VERSION:=
 LOCAL_JAVA_LAYERS_FILE:=
 LOCAL_JAVA_LIBRARIES:=
diff --git a/core/config.mk b/core/config.mk
index 566faae..2ce064f 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -304,7 +304,7 @@
 include $(BUILD_SYSTEM)/combo/select.mk
 endif
 
-ifndef KATI
+ifeq ($(CALLED_FROM_SETUP),true)
 include $(BUILD_SYSTEM)/ccache.mk
 include $(BUILD_SYSTEM)/goma.mk
 
@@ -804,6 +804,9 @@
 # We don't have prebuilt test_current SDK yet.
 TARGET_AVAILABLE_SDK_VERSIONS := test_current $(TARGET_AVAILABLE_SDK_VERSIONS)
 
+TARGET_SDK_VERSIONS_WITHOUT_JAVA_18_SUPPORT := $(call numbers_less_than,24,$(TARGET_AVAILABLE_SDK_VERSIONS))
+TARGET_SDK_VERSIONS_WITHOUT_JAVA_19_SUPPORT := $(call numbers_less_than,27,$(TARGET_AVAILABLE_SDK_VERSIONS))
+
 INTERNAL_PLATFORM_API_FILE := $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/public_api.txt
 INTERNAL_PLATFORM_REMOVED_API_FILE := $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/removed.txt
 INTERNAL_PLATFORM_SYSTEM_API_FILE := $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/system-api.txt
@@ -900,7 +903,7 @@
     vbmetaimage-nodeps \
     product-graph dump-products
 
-ifndef KATI
+ifeq ($(CALLED_FROM_SETUP),true)
 include $(BUILD_SYSTEM)/ninja_config.mk
 include $(BUILD_SYSTEM)/soong_config.mk
 endif
diff --git a/core/definitions.mk b/core/definitions.mk
index cb0a6bb..2702fc2 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -2205,6 +2205,17 @@
     @<(find $(1) -type f | sort | $(JAR_ARGS) $(1); echo "-C $(EMPTY_DIRECTORY) .")
 endef
 
+# append additional Java sources(resources/Proto sources, and etc) to $(1).
+define fetch-additional-java-source
+$(hide) if [ -d "$(PRIVATE_SOURCE_INTERMEDIATES_DIR)" ]; then \
+    find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) -name '*.java' -and -not -name '.*' >> $(1); \
+fi
+$(if $(PRIVATE_HAS_PROTO_SOURCES), \
+    $(hide) find $(PRIVATE_PROTO_SOURCE_INTERMEDIATES_DIR) -name '*.java' -and -not -name '.*' >> $(1))
+$(if $(PRIVATE_HAS_RS_SOURCES), \
+    $(hide) find $(PRIVATE_RS_SOURCE_INTERMEDIATES_DIR) -name '*.java' -and -not -name '.*' >> $(1))
+endef
+
 # Some historical notes:
 # - below we write the list of java files to java-source-list to avoid argument
 #   list length problems with Cygwin
@@ -2214,16 +2225,20 @@
 @echo "$($(PRIVATE_PREFIX)DISPLAY) Java source list: $(PRIVATE_MODULE)"
 $(hide) rm -f $@
 $(call dump-words-to-file,$(sort $(PRIVATE_JAVA_SOURCES)),$@.tmp)
-$(hide) if [ -d "$(PRIVATE_SOURCE_INTERMEDIATES_DIR)" ]; then \
-    find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) -name '*.java' -and -not -name '.*' >> $@.tmp; \
-fi
-$(if $(PRIVATE_HAS_PROTO_SOURCES), \
-    $(hide) find $(PRIVATE_PROTO_SOURCE_INTERMEDIATES_DIR) -name '*.java' -and -not -name '.*' >> $@.tmp)
-$(if $(PRIVATE_HAS_RS_SOURCES), \
-    $(hide) find $(PRIVATE_RS_SOURCE_INTERMEDIATES_DIR) -name '*.java' -and -not -name '.*' >> $@.tmp)
+$(call fetch-additional-java-source,$@.tmp)
 $(hide) tr ' ' '\n' < $@.tmp | $(NORMALIZE_PATH) | sort -u > $@
 endef
 
+# $(1): sharding number.
+# $(2): Java source files paths.
+define save-sharded-java-source-list
+$(java_source_list_file).shard.$(1): $(2) $$(NORMALIZE_PATH)
+	@echo "shard java source list: $$@"
+	rm -f $$@
+	$$(call dump-words-to-file,$(2),$$@.tmp)
+	$(hide) tr ' ' '\n' < $$@.tmp | $$(NORMALIZE_PATH) | sort -u > $$@
+endef
+
 # Common definition to invoke javac on the host and target.
 #
 # $(1): javac
@@ -2234,11 +2249,13 @@
 $(hide) mkdir -p $(dir $@)
 $(hide) mkdir -p $(PRIVATE_CLASS_INTERMEDIATES_DIR) $(PRIVATE_ANNO_INTERMEDIATES_DIR)
 $(hide) if [ -s $(PRIVATE_JAVA_SOURCE_LIST) ] ; then \
-    $(SOONG_JAVAC_WRAPPER) $(1) -encoding UTF-8 \
+    $(SOONG_JAVAC_WRAPPER) $(JAVAC_WRAPPER) $(1) -encoding UTF-8 \
     $(if $(findstring true,$(PRIVATE_WARNINGS_ENABLE)),$(xlint_unchecked),) \
-    $(addprefix -bootclasspath ,$(strip \
-        $(call normalize-path-list,$(PRIVATE_BOOTCLASSPATH)) \
-        $(PRIVATE_EMPTY_BOOTCLASSPATH))) \
+    $(if $(PRIVATE_USE_SYSTEM_MODULES), \
+      $(addprefix --system=,$(PRIVATE_SYSTEM_MODULES)), \
+      $(addprefix -bootclasspath ,$(strip \
+          $(call normalize-path-list,$(PRIVATE_BOOTCLASSPATH)) \
+          $(PRIVATE_EMPTY_BOOTCLASSPATH)))) \
     $(addprefix -classpath ,$(strip \
         $(call normalize-path-list,$(2)))) \
     $(if $(findstring true,$(PRIVATE_WARNINGS_ENABLE)),$(xlint_unchecked),) \
@@ -2265,9 +2282,34 @@
 $(if $(PRIVATE_EXTRA_JAR_ARGS),$(call add-java-resources-to,$@))
 endef
 
-define transform-java-to-classes.jar
-@echo "$($(PRIVATE_PREFIX)DISPLAY) Java: $(PRIVATE_MODULE) ($(PRIVATE_CLASS_INTERMEDIATES_DIR))"
-$(call compile-java,$(TARGET_JAVAC),$(PRIVATE_ALL_JAVA_HEADER_LIBRARIES))
+# $(1): Javac output jar name.
+# $(2): Java source list file.
+# $(3): Java header libs.
+# $(4): Javac sharding number.
+# $(5): Javac sources deps (the arg may neeed $$ in case of containing '#')
+define create-classes-full-debug.jar
+$(1): PRIVATE_JAVACFLAGS := $$(LOCAL_JAVACFLAGS) $$(annotation_processor_flags)
+$(1): PRIVATE_JAR_EXCLUDE_FILES := $$(LOCAL_JAR_EXCLUDE_FILES)
+$(1): PRIVATE_JAR_PACKAGES := $$(LOCAL_JAR_PACKAGES)
+$(1): PRIVATE_JAR_EXCLUDE_PACKAGES := $$(LOCAL_JAR_EXCLUDE_PACKAGES)
+$(1): PRIVATE_DONT_DELETE_JAR_META_INF := $$(LOCAL_DONT_DELETE_JAR_META_INF)
+$(1): PRIVATE_JAVA_SOURCE_LIST := $(2)
+$(1): PRIVATE_ALL_JAVA_HEADER_LIBRARIES := $(3)
+$(1): PRIVATE_CLASS_INTERMEDIATES_DIR := $(intermediates.COMMON)/classes$(4)
+$(1): PRIVATE_ANNO_INTERMEDIATES_DIR := $(intermediates.COMMON)/anno$(4)
+$(1): \
+    $(2) \
+    $(3) \
+    $(5) \
+    $$(full_java_bootclasspath_libs) \
+    $$(full_java_system_modules_deps) \
+    $$(layers_file) \
+    $$(annotation_processor_deps) \
+    $$(NORMALIZE_PATH) \
+    $$(JAR_ARGS) \
+    | $$(SOONG_JAVAC_WRAPPER)
+	@echo "Target Java: $$@ ($$(PRIVATE_CLASS_INTERMEDIATES_DIR))"
+	$$(call compile-java,$$(TARGET_JAVAC),$$(PRIVATE_ALL_JAVA_HEADER_LIBRARIES))
 endef
 
 define transform-java-to-header.jar
diff --git a/core/dex_preopt.mk b/core/dex_preopt.mk
index aad0acd..0dcb07f 100644
--- a/core/dex_preopt.mk
+++ b/core/dex_preopt.mk
@@ -35,10 +35,10 @@
 # Conditional to building on linux, as dex2oat currently does not work on darwin.
 ifeq ($(HOST_OS),linux)
   WITH_DEXPREOPT ?= true
-# For an eng build only pre-opt the boot image. This gives reasonable performance and still
-# allows a simple workflow: building in frameworks/base and syncing.
+# For an eng build only pre-opt the boot image and system server. This gives reasonable performance
+# and still allows a simple workflow: building in frameworks/base and syncing.
   ifeq (eng,$(TARGET_BUILD_VARIANT))
-    WITH_DEXPREOPT_BOOT_IMG_ONLY ?= true
+    WITH_DEXPREOPT_BOOT_IMG_AND_SYSTEM_SERVER_ONLY ?= true
   endif
 # Add mini-debug-info to the boot classpath unless explicitly asked not to.
   ifneq (false,$(WITH_DEXPREOPT_DEBUG_INFO))
diff --git a/core/dex_preopt_libart_boot.mk b/core/dex_preopt_libart_boot.mk
index a06aaca..302cc8b 100644
--- a/core/dex_preopt_libart_boot.mk
+++ b/core/dex_preopt_libart_boot.mk
@@ -81,7 +81,7 @@
 	@rm -f $(dir $@)/*.art $(dir $@)/*.oat
 	@rm -f $(dir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED))/*.art
 	@rm -f $(dir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED))/*.oat
-	$(DEX2OAT) --runtime-arg -Xms$(DEX2OAT_IMAGE_XMS) \
+	$(hide) ANDROID_LOG_TAGS="*:e" $(DEX2OAT) --runtime-arg -Xms$(DEX2OAT_IMAGE_XMS) \
 		--runtime-arg -Xmx$(DEX2OAT_IMAGE_XMX) \
 		$(PRIVATE_BOOT_IMAGE_FLAGS) \
 		$(addprefix --dex-file=,$(LIBART_TARGET_BOOT_DEX_FILES)) \
diff --git a/core/dex_preopt_odex_install.mk b/core/dex_preopt_odex_install.mk
index ffcd798..8c1a606 100644
--- a/core/dex_preopt_odex_install.mk
+++ b/core/dex_preopt_odex_install.mk
@@ -33,9 +33,12 @@
 ifeq (,$(strip $(built_dex)$(my_prebuilt_src_file)$(LOCAL_SOONG_DEX_JAR))) # contains no java code
 LOCAL_DEX_PREOPT :=
 endif
-# if WITH_DEXPREOPT_BOOT_IMG_ONLY=true and module is not in boot class path skip
-ifeq (true,$(WITH_DEXPREOPT_BOOT_IMG_ONLY))
-ifeq ($(filter $(DEXPREOPT_BOOT_JARS_MODULES),$(LOCAL_MODULE)),)
+# if WITH_DEXPREOPT_BOOT_IMG_AND_SYSTEM_SERVER_ONLY=true and module is not in boot class path skip
+# Also preopt system server jars since selinux prevents system server from loading anything from
+# /data. If we don't do this they will need to be extracted which is not favorable for RAM usage
+# or performance.
+ifeq (true,$(WITH_DEXPREOPT_BOOT_IMG_AND_SYSTEM_SERVER_ONLY))
+ifeq ($(filter $(PRODUCT_SYSTEM_SERVER_JARS) $(DEXPREOPT_BOOT_JARS_MODULES),$(LOCAL_MODULE)),)
 LOCAL_DEX_PREOPT :=
 endif
 endif
diff --git a/core/envsetup.mk b/core/envsetup.mk
index c99c70f..8749a32 100644
--- a/core/envsetup.mk
+++ b/core/envsetup.mk
@@ -343,6 +343,7 @@
 PRODUCT_OUT := $(TARGET_PRODUCT_OUT_ROOT)/$(TARGET_DEVICE)
 
 OUT_DOCS := $(TARGET_COMMON_OUT_ROOT)/docs
+OUT_NDK_DOCS := $(TARGET_COMMON_OUT_ROOT)/ndk-docs
 
 BUILD_OUT_EXECUTABLES := $(BUILD_OUT)/bin
 SOONG_HOST_OUT_EXECUTABLES := $(SOONG_HOST_OUT)/bin
@@ -639,7 +640,7 @@
   DIST_DIR := $(OUT_DIR)/dist
 endif
 
-ifndef KATI
+ifeq ($(CALLED_FROM_SETUP),true)
 PRINT_BUILD_CONFIG ?= true
 endif
 
diff --git a/core/host_dalvik_java_library.mk b/core/host_dalvik_java_library.mk
index 96796df..4bfe288 100644
--- a/core/host_dalvik_java_library.mk
+++ b/core/host_dalvik_java_library.mk
@@ -93,6 +93,7 @@
     $(java_sources_deps) \
     $(full_java_header_libs) \
     $(full_java_bootclasspath_libs) \
+    $(full_java_system_modules_deps) \
     $(annotation_processor_deps) \
     $(NORMALIZE_PATH) \
     $(JAR_ARGS) \
diff --git a/core/java.mk b/core/java.mk
index 5eddb0e..7584479 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -352,7 +352,36 @@
 ##########################################
 java_sources := $(addprefix $(LOCAL_PATH)/, $(filter %.java,$(LOCAL_SRC_FILES))) $(aidl_java_sources) $(logtags_java_sources) \
                 $(filter %.java,$(LOCAL_GENERATED_SOURCES))
-all_java_sources := $(java_sources) $(addprefix $(TARGET_OUT_COMMON_INTERMEDIATES)/, $(filter %.java,$(LOCAL_INTERMEDIATE_SOURCES)))
+java_intermediate_sources := $(addprefix $(TARGET_OUT_COMMON_INTERMEDIATES)/, $(filter %.java,$(LOCAL_INTERMEDIATE_SOURCES)))
+all_java_sources := $(java_sources) $(java_intermediate_sources)
+
+enable_sharding :=
+ifneq ($(TURBINE_ENABLED),false)
+ifneq ($(LOCAL_JAVAC_SHARD_SIZE),)
+ifneq ($(LOCAL_JAR_PROCESSOR),)
+$(call pretty-error,Cannot set both LOCAL_JAVAC_SHARD_SIZE and LOCAL_JAR_PROCESSOR!)
+endif # LOCAL_JAR_PROCESSOR is not empty
+enable_sharding := true
+
+num_shards := $(call int_divide,$(words $(java_sources)),$(LOCAL_JAVAC_SHARD_SIZE))
+ifneq ($(words $(java_sources)),$(call int_multiply,$(LOCAL_JAVAC_SHARD_SIZE),$(num_shards)))
+# increment number of shards by 1.
+num_shards := $(call int_plus,$(num_shards),1)
+endif
+
+shard_idx_list := $(call int_range_list,1,$(num_shards))
+sharded_java_source_list_files += $(foreach x,$(shard_idx_list),$(java_source_list_file).shard.$(x))
+sharded_jar_list += $(foreach x,$(shard_idx_list),$(full_classes_compiled_jar).shard.$(x))
+
+# always put dynamically-located .java files (generated by Proto/resource, etc) in a new final shard.
+# increment number of shards by 1.
+num_shards := $(call int_plus,$(num_shards),1)
+sharded_java_source_list_files += $(java_source_list_file).shard.$(num_shards)
+sharded_jar_list += $(full_classes_compiled_jar).shard.$(num_shards)
+LOCAL_INTERMEDIATE_TARGETS += $(sharded_java_source_list_files)
+LOCAL_INTERMEDIATE_TARGETS += $(sharded_jar_list)
+endif # LOCAL_JAVAC_SHARD_SIZE is not empty
+endif # TURBINE_ENABLED != false
 
 include $(BUILD_SYSTEM)/java_common.mk
 
@@ -419,23 +448,47 @@
 $(java_source_list_file): $(java_sources_deps)
 	$(write-java-source-list)
 
-$(full_classes_compiled_jar): PRIVATE_JAVACFLAGS := $(LOCAL_JAVACFLAGS) $(annotation_processor_flags)
-$(full_classes_compiled_jar): PRIVATE_JAR_EXCLUDE_FILES := $(LOCAL_JAR_EXCLUDE_FILES)
-$(full_classes_compiled_jar): PRIVATE_JAR_PACKAGES := $(LOCAL_JAR_PACKAGES)
-$(full_classes_compiled_jar): PRIVATE_JAR_EXCLUDE_PACKAGES := $(LOCAL_JAR_EXCLUDE_PACKAGES)
-$(full_classes_compiled_jar): PRIVATE_DONT_DELETE_JAR_META_INF := $(LOCAL_DONT_DELETE_JAR_META_INF)
-$(full_classes_compiled_jar): PRIVATE_JAVA_SOURCE_LIST := $(java_source_list_file)
-$(full_classes_compiled_jar): \
-    $(java_source_list_file) \
-    $(java_sources_deps) \
-    $(full_java_header_libs) \
-    $(full_java_bootclasspath_libs) \
-    $(layers_file) \
-    $(annotation_processor_deps) \
-    $(NORMALIZE_PATH) \
-    $(JAR_ARGS) \
-    | $(SOONG_JAVAC_WRAPPER)
-	$(transform-java-to-classes.jar)
+ifdef enable_sharding
+$(foreach x,$(shard_idx_list),\
+  $(eval $(call save-sharded-java-source-list,$(x),\
+    $(wordlist $(call int_plus,1,$(call int_multiply,$(LOCAL_JAVAC_SHARD_SIZE),$(call int_subtract,$(x),1))),\
+      $(call int_multiply,$(LOCAL_JAVAC_SHARD_SIZE),$(x)),$(sort $(java_sources))))))
+
+# always put dynamically-located .java files (generated by Proto/resource, etc) in a new final shard.
+$(java_source_list_file).shard.$(num_shards): PRIVATE_JAVA_INTERMEDIATE_SOURCES := $(java_intermediate_sources)
+$(java_source_list_file).shard.$(num_shards): $(java_resource_sources) \
+    $(RenderScript_file_stamp) \
+    $(proto_java_sources_file_stamp) \
+    $(LOCAL_ADDITIONAL_DEPENDENCIES) \
+    $(NORMALIZE_PATH)
+	$(hide) rm -f $@
+	$(call dump-words-to-file,$(PRIVATE_JAVA_INTERMEDIATE_SOURCES),$@.tmp)
+	$(call fetch-additional-java-source,$@.tmp)
+	$(hide) tr ' ' '\n' < $@.tmp | $(NORMALIZE_PATH) | sort -u > $@
+
+# Javac sharding with header libs including its own header jar as one of dependency.
+$(foreach x,$(shard_idx_list),\
+  $(eval $(call create-classes-full-debug.jar,$(full_classes_compiled_jar).shard.$(x),\
+    $(java_source_list_file).shard.$(x),\
+      $(full_java_header_libs) $(full_classes_header_jar),$(x),\
+        $(wordlist $(call int_plus,1,$(call int_multiply,$(LOCAL_JAVAC_SHARD_SIZE),$(call int_subtract,$(x),1))),\
+          $(call int_multiply,$(LOCAL_JAVAC_SHARD_SIZE),$(x)),$(sort $(java_sources))))))
+
+# Javac sharding for last shard with additional Java dependencies.
+$(eval $(call create-classes-full-debug.jar,$(full_classes_compiled_jar).shard.$(num_shards),\
+  $(java_source_list_file).shard.$(num_shards),$(full_java_header_libs) $(full_classes_header_jar),$(strip \
+    $(num_shards)),$$(java_resource_sources) $$(RenderScript_file_stamp) \
+      $$(proto_java_sources_file_stamp) $$(LOCAL_ADDITIONAL_DEPENDENCIES)))
+
+$(full_classes_compiled_jar): PRIVATE_SHARDED_JAR_LIST := $(sharded_jar_list)
+$(full_classes_compiled_jar): $(sharded_jar_list) | $(MERGE_ZIPS)
+	$(MERGE_ZIPS) -j $@ $(PRIVATE_SHARDED_JAR_LIST)
+else
+# we can't use single $ for java_sources_deps since it may contain hash '#' sign.
+$(eval $(call create-classes-full-debug.jar,$(full_classes_compiled_jar),\
+  $(java_source_list_file),$(full_java_header_libs),,$$(java_sources_deps)))
+
+endif # ifdef enable_sharding
 
 ifneq ($(TURBINE_ENABLED),false)
 
@@ -446,6 +499,7 @@
     $(java_sources_deps) \
     $(full_java_header_libs) \
     $(full_java_bootclasspath_libs) \
+    $(full_java_system_modules_deps) \
     $(NORMALIZE_PATH) \
     $(JAR_ARGS) \
     $(ZIPTIME) \
diff --git a/core/java_common.mk b/core/java_common.mk
index 320c52f..a73c6db 100644
--- a/core/java_common.mk
+++ b/core/java_common.mk
@@ -15,20 +15,17 @@
 # Modules can override this logic by specifying
 # LOCAL_JAVA_LANGUAGE_VERSION explicitly.
 ifeq (,$(LOCAL_JAVA_LANGUAGE_VERSION))
-  private_sdk_versions_without_any_java_18_support := 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
-  ifneq (,$(filter $(LOCAL_SDK_VERSION), $(private_sdk_versions_without_any_java_18_support)))
+  ifneq (,$(filter $(LOCAL_SDK_VERSION), $(TARGET_SDK_VERSIONS_WITHOUT_JAVA_18_SUPPORT)))
     LOCAL_JAVA_LANGUAGE_VERSION := 1.7
+  else ifneq (,$(filter $(LOCAL_SDK_VERSION), $(TARGET_SDK_VERSIONS_WITHOUT_JAVA_19_SUPPORT)))
+    LOCAL_JAVA_LANGUAGE_VERSION := 1.8
+  else ifneq (,$(LOCAL_SDK_VERSION)$(TARGET_BUILD_APPS))
+    # TODO(ccross): allow 1.9 for current and unbundled once we have SDK system modules
+    LOCAL_JAVA_LANGUAGE_VERSION := 1.8
   else
-    ifneq ($(EXPERIMENTAL_USE_OPENJDK9),true)
-      LOCAL_JAVA_LANGUAGE_VERSION := 1.8
-    else
-      private_sdk_versions_without_any_java_19_support := 24 25 26
-      ifneq (,$(filter $(LOCAL_SDK_VERSION), $(private_sdk_versions_without_any_java_19_support)))
-        LOCAL_JAVA_LANGUAGE_VERSION := 1.8
-      else
-        LOCAL_JAVA_LANGUAGE_VERSION := 1.9
-      endif
-    endif
+    # DEFAULT_JAVA_LANGUAGE_VERSION is 1.8 unless EXPERIMENTAL_USE_OPENJDK9=true
+    # in which case it is 1.9
+    LOCAL_JAVA_LANGUAGE_VERSION := $(DEFAULT_JAVA_LANGUAGE_VERSION)
   endif
 endif
 LOCAL_JAVACFLAGS += -source $(LOCAL_JAVA_LANGUAGE_VERSION) -target $(LOCAL_JAVA_LANGUAGE_VERSION)
@@ -201,6 +198,7 @@
 
 full_java_bootclasspath_libs :=
 empty_bootclasspath :=
+my_system_modules :=
 
 # full_java_libs: The list of files that should be used as the classpath.
 #                 Using this list as a dependency list WILL NOT WORK.
@@ -209,8 +207,13 @@
     ifeq ($(LOCAL_NO_STANDARD_LIBRARIES),true)
       # No bootclasspath. But we still need "" to prevent javac from using default host bootclasspath.
       empty_bootclasspath := ""
+      # Most users of LOCAL_NO_STANDARD_LIBRARIES really mean no framework libs,
+      # and manually add back the core libs.  The ones that don't are in soong
+      # now, so just always assume that they want the default system modules
+      my_system_modules := $(DEFAULT_SYSTEM_MODULES)
     else  # LOCAL_NO_STANDARD_LIBRARIES
       full_java_bootclasspath_libs := $(call java-lib-header-files,$(TARGET_DEFAULT_BOOTCLASSPATH_LIBRARIES))
+      my_system_modules := $(DEFAULT_SYSTEM_MODULES)
     endif  # LOCAL_NO_STANDARD_LIBRARIES
   else
     ifeq ($(LOCAL_NO_STANDARD_LIBRARIES),true)
@@ -255,6 +258,7 @@
       full_java_bootclasspath_libs := $(call java-lib-header-files,$(addsuffix -hostdex,$(TARGET_DEFAULT_BOOTCLASSPATH_LIBRARIES)),true)
     endif
 
+    my_system_modules := $(DEFAULT_SYSTEM_MODULES)
     full_shared_java_libs := $(call java-lib-files,$(LOCAL_JAVA_LIBRARIES),true)
     full_shared_java_header_libs := $(call java-lib-header-files,$(LOCAL_JAVA_LIBRARIES),true)
   else # !USE_CORE_LIB_BOOTCLASSPATH
@@ -270,8 +274,25 @@
   endif
 endif
 
+full_java_system_modules_deps :=
+my_system_modules_dir :=
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_USE_SYSTEM_MODULES :=
+ifeq ($(LOCAL_JAVA_LANGUAGE_VERSION),1.9)
+  $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_USE_SYSTEM_MODULES := true
+  ifdef my_system_modules
+    ifneq ($(my_system_modules),none)
+      ifndef SOONG_SYSTEM_MODULES_$(my_system_modules)
+        $(call pretty-error, Invalid system modules $(my_system_modules))
+      endif
+      full_java_system_modules_deps := $(SOONG_SYSTEM_MODULES_$(my_system_modules))
+      my_system_modules_dir := $(patsubst %/lib/modules,%,$(SOONG_SYSTEM_MODULES_$(my_system_modules)))
+    endif
+  endif
+endif
+
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH := $(full_java_bootclasspath_libs)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_EMPTY_BOOTCLASSPATH := $(empty_bootclasspath)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_SYSTEM_MODULES := $(my_system_modules_dir)
 
 full_java_libs := $(full_shared_java_libs) $(full_static_java_libs) $(LOCAL_CLASSPATH)
 full_java_header_libs := $(full_shared_java_header_libs) $(full_static_java_header_libs)
diff --git a/core/math.mk b/core/math.mk
index 047d046..44e03ce 100644
--- a/core/math.mk
+++ b/core/math.mk
@@ -42,6 +42,11 @@
 $(if $(call math_is_number,$(1)),,$(error Only positive integers <= 100 are supported (not $(1))))
 endef
 
+# return a list containing integers ranging from [$(1),$(2)]
+define int_range_list
+$(call _math_check_valid,$(1))$(call _math_check_valid,$(2))$(wordlist $(1),$(2),$(__MATH_NUMBERS))
+endef
+
 #$(call _math_check_valid,0)
 #$(call _math_check_valid,1)
 #$(call _math_check_valid,100)
@@ -67,6 +72,10 @@
 $(if $(filter $(1),$(call math_max,$(1),$(2))),true)
 endef
 
+define math_lt
+$(if $(call math_gt_or_eq,$(1),$(2)),,true)
+endef
+
 #$(warning $(call math_gt_or_eq, 2, 1))
 #$(warning $(call math_gt_or_eq, 1, 1))
 #$(warning $(if $(call math_gt_or_eq, 1, 2),false,true))
@@ -75,3 +84,69 @@
 define inc_and_print
 $(strip $(eval $(1) := $($(1)) .)$(words $($(1))))
 endef
+
+# Returns the words in $2 that are numbers and are less than $1
+define numbers_less_than
+$(strip \
+  $(foreach n,$2, \
+    $(if $(call math_is_number,$(n)), \
+      $(if $(call math_lt,$(n),$(1)), \
+        $(n)))))
+endef
+
+_INT_LIMIT_WORDS := $(foreach a,x x,$(foreach b,x x x x x x x x x x x x x x x x,\
+  $(foreach c,x x x x x x x x x x x x x x x x,x x x x x x x x x x x x x x x x)))
+
+define _int_encode
+$(if $(filter $(words x $(_INT_LIMIT_WORDS)),$(words $(wordlist 1,$(1),x $(_INT_LIMIT_WORDS)))),\
+  $(call pretty-error,integer greater than $(words $(_INT_LIMIT_WORDS)) is not supported!),\
+    $(wordlist 1,$(1),$(_INT_LIMIT_WORDS)))
+endef
+
+# _int_max returns the maximum of the two arguments
+# input: two (x) lists; output: one (x) list
+# integer cannot be passed in directly. It has to be converted using _int_encode.
+define _int_max
+$(subst xx,x,$(join $(1),$(2)))
+endef
+
+# first argument is greater than second argument
+# output: non-empty if true
+# integer cannot be passed in directly. It has to be converted using _int_encode.
+define _int_greater-than
+$(filter-out $(words $(2)),$(words $(call _int_max,$(1),$(2))))
+endef
+
+# first argument equals to second argument
+# output: non-empty if true
+# integer cannot be passed in directly. It has to be converted using _int_encode.
+define _int_equal
+$(filter $(words $(1)),$(words $(2)))
+endef
+
+# first argument is greater than or equal to second argument
+# output: non-empty if true
+# integer cannot be passed in directly. It has to be converted using _int_encode.
+define _int_greater-or-equal
+$(call _int_greater-than,$(1),$(2))$(call _int_equal,$(1),$(2))
+endef
+
+define int_plus
+$(words $(call _int_encode,$(1)) $(call _int_encode,$(2)))
+endef
+
+define int_subtract
+$(if $(call _int_greater-or-equal,$(call _int_encode,$(1)),$(call _int_encode,$(2))),\
+  $(words $(filter-out xx,$(join $(call _int_encode,$(1)),$(call _int_encode,$(2))))),\
+    $(call pretty-error,$(1) subtract underflow $(2)))
+endef
+
+define int_multiply
+$(words $(foreach a,$(call _int_encode,$(1)),$(call _int_encode,$(2))))
+endef
+
+define int_divide
+$(if $(filter 0,$(2)),$(call pretty-error,division by zero is not allowed!),$(strip \
+  $(if $(call _int_greater-or-equal,$(call _int_encode,$(1)),$(call _int_encode,$(2))), \
+    $(call int_plus,$(call int_divide,$(call int_subtract,$(1),$(2)),$(2)),1),0)))
+endef
diff --git a/core/package_internal.mk b/core/package_internal.mk
index 5a1ef05..01e2463 100644
--- a/core/package_internal.mk
+++ b/core/package_internal.mk
@@ -333,6 +333,7 @@
 # Make sure the data-binding process happens before javac and generation of R.java.
 $(R_file_stamp): $(data_binding_stamp)
 $(java_source_list_file): $(data_binding_stamp)
+$(foreach x,$(sharded_java_source_list_files),$(eval $(x): $(data_binding_stamp)))
 $(full_classes_compiled_jar): $(data_binding_stamp)
 endif  # LOCAL_DATA_BINDING
 
@@ -426,6 +427,7 @@
 # The R.java file must exist by the time the java source
 # list is generated
 $(java_source_list_file): $(R_file_stamp)
+$(foreach x,$(sharded_java_source_list_files),$(eval $(x): $(R_file_stamp)))
 
 endif  # need_compile_res
 
diff --git a/core/product.mk b/core/product.mk
index cf62283..c955ccc 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -303,7 +303,7 @@
 _product_stash_var_list += \
 	DEFAULT_SYSTEM_DEV_CERTIFICATE \
 	WITH_DEXPREOPT \
-	WITH_DEXPREOPT_BOOT_IMG_ONLY \
+	WITH_DEXPREOPT_BOOT_IMG_AND_SYSTEM_SERVER_ONLY \
 	WITH_DEXPREOPT_APP_IMAGE
 
 #
diff --git a/core/product_config.mk b/core/product_config.mk
index cd62fb2..492219b 100644
--- a/core/product_config.mk
+++ b/core/product_config.mk
@@ -88,7 +88,7 @@
 # Provide "PRODUCT-<prodname>-<goal>" targets, which lets you build
 # a particular configuration without needing to set up the environment.
 #
-ifndef KATI
+ifeq ($(CALLED_FROM_SETUP),true)
 product_goals := $(strip $(filter PRODUCT-%,$(MAKECMDGOALS)))
 ifdef product_goals
   # Scrape the product and build names out of the goal,
@@ -129,14 +129,14 @@
   # position, in case it matters.
   override MAKECMDGOALS := $(patsubst $(goal_name),$(default_goal_substitution),$(MAKECMDGOALS))
 endif
-endif # !KATI
+endif # CALLED_FROM_SETUP
 # else: Use the value set in the environment or buildspec.mk.
 
 # ---------------------------------------------------------------
 # Provide "APP-<appname>" targets, which lets you build
 # an unbundled app.
 #
-ifndef KATI
+ifeq ($(CALLED_FROM_SETUP),true)
 unbundled_goals := $(strip $(filter APP-%,$(MAKECMDGOALS)))
 ifdef unbundled_goals
   ifneq ($(words $(unbundled_goals)),1)
diff --git a/core/soong_config.mk b/core/soong_config.mk
index ae0a0b2..629edfc 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -13,6 +13,7 @@
 endif
 endif
 
+ifeq ($(WRITE_SOONG_VARIABLES),true)
 # Converts a list to a JSON list.
 # $1: List separator.
 # $2: List.
@@ -24,77 +25,105 @@
 # Converts a comma-separated list to a JSON list.
 csv_to_json_list = $(call _json_list,$(comma),$(1))
 
+# 1: Key name
+# 2: Value
+add_json_val = $(eval _contents := $$(_contents)    "$$(strip $$(1))":$$(space)$$(strip $$(2))$$(comma)$$(newline))
+add_json_str = $(call add_json_val,$(1),"$(strip $(2))")
+add_json_list = $(call add_json_val,$(1),$(call json_list,$(patsubst %,%,$(2))))
+add_json_csv = $(call add_json_val,$(1),$(call csv_to_json_list,$(strip $(2))))
+add_json_bool = $(call add_json_val,$(1),$(if $(strip $(2)),true,false))
+
+invert_bool = $(if $(strip $(1)),,true)
+
 # Create soong.variables with copies of makefile settings.  Runs every build,
 # but only updates soong.variables if it changes
-SOONG_VARIABLES_TMP := $(SOONG_VARIABLES).$$$$
-$(SOONG_VARIABLES): FORCE
-	$(hide) mkdir -p $(dir $@)
-	$(hide) (\
-	echo '{'; \
-	echo '    "Make_suffix": "-$(TARGET_PRODUCT)",'; \
-	echo ''; \
-	echo '    "Platform_sdk_version": $(PLATFORM_SDK_VERSION),'; \
-	echo '    "Platform_version_active_codenames": $(call csv_to_json_list,$(PLATFORM_VERSION_ALL_CODENAMES)),'; \
-	echo '    "Platform_version_future_codenames": $(call csv_to_json_list,$(PLATFORM_VERSION_FUTURE_CODENAMES)),'; \
-	echo '    "Unbundled_build": $(if $(TARGET_BUILD_APPS),true,false),'; \
-	echo '    "Brillo": $(if $(BRILLO),true,false),'; \
-	echo '    "Malloc_not_svelte": $(if $(filter true,$(MALLOC_SVELTE)),false,true),'; \
-	echo '    "Allow_missing_dependencies": $(if $(ALLOW_MISSING_DEPENDENCIES),true,false),'; \
-	echo '    "SanitizeHost": $(call json_list,$(SANITIZE_HOST)),'; \
-	echo '    "SanitizeDevice": $(call json_list,$(SANITIZE_TARGET)),'; \
-	echo '    "SanitizeDeviceDiag": $(call json_list,$(SANITIZE_TARGET_DIAG)),'; \
-	echo '    "SanitizeDeviceArch": $(call json_list,$(SANITIZE_TARGET_ARCH)),'; \
-	echo '    "HostStaticBinaries": $(if $(strip $(BUILD_HOST_static)),true,false),'; \
-	echo '    "Binder32bit": $(if $(BINDER32BIT),true,false),'; \
-	echo '    "DevicePrefer32BitExecutables": $(if $(filter true,$(TARGET_PREFER_32_BIT_EXECUTABLES)),true,false),'; \
-	echo '    "UseGoma": $(if $(filter-out false,$(USE_GOMA)),true,false),'; \
-	echo '    "Debuggable": $(if $(filter userdebug eng,$(TARGET_BUILD_VARIANT)),true,false),'; \
-	echo '    "Eng": $(if $(filter eng,$(TARGET_BUILD_VARIANT)),true,false),'; \
-	echo '    "VendorPath": "$(TARGET_COPY_OUT_VENDOR)",'; \
-	echo ''; \
-	echo '    "ClangTidy": $(if $(filter 1 true,$(WITH_TIDY)),true,false),'; \
-	echo '    "TidyChecks": "$(WITH_TIDY_CHECKS)",'; \
-	echo ''; \
-	echo '    "NativeCoverage": $(if $(filter true,$(NATIVE_COVERAGE)),true,false),'; \
-	echo '    "CoveragePaths": $(call csv_to_json_list,$(COVERAGE_PATHS)),'; \
-	echo '    "CoverageExcludePaths": $(call csv_to_json_list,$(COVERAGE_EXCLUDE_PATHS)),'; \
-	echo ''; \
-	echo '    "DeviceName": "$(TARGET_DEVICE)",'; \
-	echo '    "DeviceArch": "$(TARGET_ARCH)",'; \
-	echo '    "DeviceArchVariant": "$(TARGET_ARCH_VARIANT)",'; \
-	echo '    "DeviceCpuVariant": "$(TARGET_CPU_VARIANT)",'; \
-	echo '    "DeviceAbi": ["$(TARGET_CPU_ABI)", "$(TARGET_CPU_ABI2)"],'; \
-	echo '    "DeviceUsesClang": $(if $(USE_CLANG_PLATFORM_BUILD),$(USE_CLANG_PLATFORM_BUILD),false),'; \
-	echo '    "DeviceVndkVersion": "$(BOARD_VNDK_VERSION)",'; \
-	echo ''; \
-	echo '    "DeviceSecondaryArch": "$(TARGET_2ND_ARCH)",'; \
-	echo '    "DeviceSecondaryArchVariant": "$(TARGET_2ND_ARCH_VARIANT)",'; \
-	echo '    "DeviceSecondaryCpuVariant": "$(TARGET_2ND_CPU_VARIANT)",'; \
-	echo '    "DeviceSecondaryAbi": ["$(TARGET_2ND_CPU_ABI)", "$(TARGET_2ND_CPU_ABI2)"],'; \
-	echo ''; \
-	echo '    "HostArch": "$(HOST_ARCH)",'; \
-	echo '    "HostSecondaryArch": "$(HOST_2ND_ARCH)",'; \
-	echo ''; \
-	echo '    "CrossHost": "$(HOST_CROSS_OS)",'; \
-	echo '    "CrossHostArch": "$(HOST_CROSS_ARCH)",'; \
-	echo '    "CrossHostSecondaryArch": "$(HOST_CROSS_2ND_ARCH)",'; \
-	echo '    "Safestack": $(if $(filter true,$(USE_SAFESTACK)),true,false),'; \
-	echo '    "EnableCFI": $(if $(filter false,$(ENABLE_CFI)),false,true),'; \
-	echo '    "IntegerOverflowExcludePaths": $(call json_list,$(INTEGER_OVERFLOW_EXCLUDE_PATHS) $(PRODUCT_INTEGER_OVERFLOW_EXCLUDE_PATHS)),'; \
-	echo '    "Device_uses_hwc2": $(if $(filter true,$(TARGET_USES_HWC2)),true,false),'; \
-	echo '    "Override_rs_driver": "$(OVERRIDE_RS_DRIVER)",'; \
-	echo '    "Treble": $(if $(filter true,$(PRODUCT_FULL_TREBLE)),true,false),'; \
-	echo '    "Pdk": $(if $(filter true,$(TARGET_BUILD_PDK)),true,false),'; \
-	echo '    "Uml": $(if $(filter true,$(TARGET_USER_MODE_LINUX)),true,false),'; \
-	echo ''; \
-	echo '    "ArtUseReadBarrier": $(if $(filter false,$(PRODUCT_ART_USE_READ_BARRIER)),false,true),'; \
-	echo ''; \
-	echo '    "BtConfigIncludeDir": "$(BOARD_BLUETOOTH_BDROID_BUILDCFG_INCLUDE_DIR)",'; \
-	echo ''; \
-	echo '    "DeviceKernelHeaders": $(call json_list,$(strip $(TARGET_PROJECT_SYSTEM_INCLUDES)))'; \
-	echo '}') > $(SOONG_VARIABLES_TMP); \
-	if ! cmp -s $(SOONG_VARIABLES_TMP) $(SOONG_VARIABLES); then \
-	  mv $(SOONG_VARIABLES_TMP) $(SOONG_VARIABLES); \
+$(shell mkdir -p $(dir $(SOONG_VARIABLES)))
+_contents := {$(newline)
+
+$(call add_json_str,  Make_suffix, -$(TARGET_PRODUCT))
+
+$(call add_json_val,  Platform_sdk_version,              $(PLATFORM_SDK_VERSION))
+$(call add_json_csv,  Platform_version_active_codenames, $(PLATFORM_VERSION_ALL_CODENAMES))
+$(call add_json_csv,  Platform_version_future_codenames, $(PLATFORM_VERSION_FUTURE_CODENAMES))
+
+$(call add_json_bool, Allow_missing_dependencies,        $(ALLOW_MISSING_DEPENDENCIES))
+$(call add_json_bool, Unbundled_build,                   $(TARGET_BUILD_APPS))
+$(call add_json_bool, Pdk,                               $(filter true,$(TARGET_BUILD_PDK)))
+
+$(call add_json_bool, Debuggable,                        $(filter userdebug eng,$(TARGET_BUILD_VARIANT)))
+$(call add_json_bool, Eng,                               $(filter eng,$(TARGET_BUILD_VARIANT)))
+
+$(call add_json_str,  DeviceName,                        $(TARGET_DEVICE))
+$(call add_json_str,  DeviceArch,                        $(TARGET_ARCH))
+$(call add_json_str,  DeviceArchVariant,                 $(TARGET_ARCH_VARIANT))
+$(call add_json_str,  DeviceCpuVariant,                  $(TARGET_CPU_VARIANT))
+$(call add_json_list, DeviceAbi,                         $(TARGET_CPU_ABI) $(TARGET_CPU_ABI2))
+
+$(call add_json_str,  DeviceSecondaryArch,               $(TARGET_2ND_ARCH))
+$(call add_json_str,  DeviceSecondaryArchVariant,        $(TARGET_2ND_ARCH_VARIANT))
+$(call add_json_str,  DeviceSecondaryCpuVariant,         $(TARGET_2ND_CPU_VARIANT))
+$(call add_json_list, DeviceSecondaryAbi,                $(TARGET_2ND_CPU_ABI) $(TARGET_2ND_CPU_ABI2))
+
+$(call add_json_str,  HostArch,                          $(HOST_ARCH))
+$(call add_json_str,  HostSecondaryArch,                 $(HOST_2ND_ARCH))
+$(call add_json_bool, HostStaticBinaries,                $(BUILD_HOST_static))
+
+$(call add_json_str,  CrossHost,                         $(HOST_CROSS_OS))
+$(call add_json_str,  CrossHostArch,                     $(HOST_CROSS_ARCH))
+$(call add_json_str,  CrossHostSecondaryArch,            $(HOST_CROSS_2ND_ARCH))
+
+$(call add_json_list, SanitizeHost,                      $(SANITIZE_HOST))
+$(call add_json_list, SanitizeDevice,                    $(SANITIZE_TARGET))
+$(call add_json_list, SanitizeDeviceDiag,                $(SANITIZE_TARGET_DIAG))
+$(call add_json_list, SanitizeDeviceArch,                $(SANITIZE_TARGET_ARCH))
+
+$(call add_json_bool, Safestack,                         $(filter true,$(USE_SAFESTACK)))
+$(call add_json_bool, EnableCFI,                         $(call invert_bool,$(filter false,$(ENABLE_CFI))))
+$(call add_json_list, IntegerOverflowExcludePaths,       $(INTEGER_OVERFLOW_EXCLUDE_PATHS) $(PRODUCT_INTEGER_OVERFLOW_EXCLUDE_PATHS))
+
+$(call add_json_bool, ClangTidy,                         $(filter 1 true,$(WITH_TIDY)))
+$(call add_json_str,  TidyChecks,                        $(WITH_TIDY_CHECKS))
+
+$(call add_json_bool, NativeCoverage,                    $(filter true,$(NATIVE_COVERAGE)))
+$(call add_json_csv,  CoveragePaths,                     $(COVERAGE_PATHS))
+$(call add_json_csv,  CoverageExcludePaths,              $(COVERAGE_EXCLUDE_PATHS))
+
+$(call add_json_bool, ArtUseReadBarrier,                 $(call invert_bool,$(filter false,$(PRODUCT_ART_USE_READ_BARRIER))))
+$(call add_json_bool, Binder32bit,                       $(BINDER32BIT))
+$(call add_json_bool, Brillo,                            $(BRILLO))
+$(call add_json_str,  BtConfigIncludeDir,                $(BOARD_BLUETOOTH_BDROID_BUILDCFG_INCLUDE_DIR))
+$(call add_json_bool, Device_uses_hwc2,                  $(filter true,$(TARGET_USES_HWC2)))
+$(call add_json_list, DeviceKernelHeaders,               $(TARGET_PROJECT_SYSTEM_INCLUDES))
+$(call add_json_bool, DevicePrefer32BitExecutables,      $(filter true,$(TARGET_PREFER_32_BIT_EXECUTABLES)))
+$(call add_json_val,  DeviceUsesClang,                   $(if $(USE_CLANG_PLATFORM_BUILD),$(USE_CLANG_PLATFORM_BUILD),false))
+$(call add_json_str,  DeviceVndkVersion,                 $(BOARD_VNDK_VERSION))
+$(call add_json_bool, Malloc_not_svelte,                 $(call invert_bool,$(filter true,$(MALLOC_SVELTE))))
+$(call add_json_str,  Override_rs_driver,                $(OVERRIDE_RS_DRIVER))
+$(call add_json_bool, Treble,                            $(filter true,$(PRODUCT_FULL_TREBLE)))
+$(call add_json_bool, Uml,                               $(filter true,$(TARGET_USER_MODE_LINUX)))
+$(call add_json_str,  VendorPath,                        $(TARGET_COPY_OUT_VENDOR))
+
+$(call add_json_bool, UseGoma,                           $(filter-out false,$(USE_GOMA)))
+
+_contents := $(subst $(comma)$(newline)__SV_END,$(newline)}$(newline),$(_contents)__SV_END)
+
+$(file >$(SOONG_VARIABLES).tmp,$(_contents))
+
+$(shell if ! cmp -s $(SOONG_VARIABLES).tmp $(SOONG_VARIABLES); then \
+	  mv $(SOONG_VARIABLES).tmp $(SOONG_VARIABLES); \
 	else \
-	  rm $(SOONG_VARIABLES_TMP); \
-	fi
+	  rm $(SOONG_VARIABLES).tmp; \
+	fi)
+
+_json_list :=
+json_list :=
+csv_to_json_list :=
+add_json_val :=
+add_json_str :=
+add_json_list :=
+add_json_csv :=
+add_json_bool :=
+invert_bool :=
+_contents :=
+
+endif # CONFIGURE_SOONG
diff --git a/core/static_java_library.mk b/core/static_java_library.mk
index ca3b071..c402dce 100644
--- a/core/static_java_library.mk
+++ b/core/static_java_library.mk
@@ -168,6 +168,7 @@
 
 $(LOCAL_BUILT_MODULE): $(R_file_stamp)
 $(java_source_list_file): $(R_file_stamp)
+$(foreach x,$(sharded_java_source_list_files),$(eval $(x): $(R_file_stamp)))
 $(full_classes_compiled_jar): $(R_file_stamp)
 $(full_classes_turbine_jar): $(R_file_stamp)
 
diff --git a/core/tasks/tools/build_custom_image.mk b/core/tasks/tools/build_custom_image.mk
index 370934b..7c38546 100644
--- a/core/tasks/tools/build_custom_image.mk
+++ b/core/tasks/tools/build_custom_image.mk
@@ -135,6 +135,7 @@
 	    echo "verity_block_device=$(PRIVATE_VERITY_BLOCK_DEVICE)" >> $(PRIVATE_INTERMEDIATES)/image_info.txt)
 	$(if $(PRIVATE_SUPPORT_VERITY_FEC),\
 	  $(hide) echo "verity_fec=$(PRIVATE_SUPPORT_VERITY_FEC)" >> $(PRIVATE_INTERMEDIATES)/image_info.txt)
+	$(if $(filter eng, $(TARGET_BUILD_VARIANT)),$(hide) echo "verity_disable=true" >> $(PRIVATE_INTERMEDIATES)/image_info.txt)
 	$(hide) echo "avb_avbtool=$(PRIVATE_AVB_AVBTOOL)" >> $(PRIVATE_INTERMEDIATES)/image_info.txt
 	$(if $(PRIVATE_AVB_KEY_PATH),\
 	  $(hide) echo "avb_key_path=$(PRIVATE_AVB_KEY_PATH)" >> $(PRIVATE_INTERMEDIATES)/image_info.txt;\
diff --git a/envsetup.sh b/envsetup.sh
index a8bef92..25d95f4 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -51,20 +51,18 @@
     cached_vars=`cat $T/build/envsetup.sh | tr '()' '  ' | awk '{for(i=1;i<=NF;i++) if($i~/get_build_var/) print $(i+1)}' | sort -u | tr '\n' ' '`
     cached_abs_vars=`cat $T/build/envsetup.sh | tr '()' '  ' | awk '{for(i=1;i<=NF;i++) if($i~/get_abs_build_var/) print $(i+1)}' | sort -u | tr '\n' ' '`
     # Call the build system to dump the "<val>=<value>" pairs as a shell script.
-    build_dicts_script=`\cd $T; CALLED_FROM_SETUP=true BUILD_SYSTEM=build/core \
-                        command make --no-print-directory -f build/core/config.mk \
-                        dump-many-vars \
-                        DUMP_MANY_VARS="$cached_vars" \
-                        DUMP_MANY_ABS_VARS="$cached_abs_vars" \
-                        DUMP_VAR_PREFIX="var_cache_" \
-                        DUMP_ABS_VAR_PREFIX="abs_var_cache_"`
+    build_dicts_script=`\cd $T; build/soong/soong_ui.bash --dumpvars-mode \
+                        --vars="$cached_vars" \
+                        --abs-vars="$cached_abs_vars" \
+                        --var-prefix=var_cache_ \
+                        --abs-var-prefix=abs_var_cache_`
     local ret=$?
     if [ $ret -ne 0 ]
     then
         unset build_dicts_script
         return $ret
     fi
-    # Excute the script to store the "<val>=<value>" pairs as shell variables.
+    # Execute the script to store the "<val>=<value>" pairs as shell variables.
     eval "$build_dicts_script"
     ret=$?
     unset build_dicts_script
@@ -105,8 +103,7 @@
         echo "Couldn't locate the top of the tree.  Try setting TOP." >&2
         return
     fi
-    (\cd $T; CALLED_FROM_SETUP=true BUILD_SYSTEM=build/core \
-      command make --no-print-directory -f build/core/config.mk dumpvar-abs-$1)
+    (\cd $T; build/soong/soong_ui.bash --dumpvar-mode --abs $1)
 }
 
 # Get the exact value of a build variable.
@@ -123,8 +120,7 @@
         echo "Couldn't locate the top of the tree.  Try setting TOP." >&2
         return
     fi
-    (\cd $T; CALLED_FROM_SETUP=true BUILD_SYSTEM=build/core \
-      command make --no-print-directory -f build/core/config.mk dumpvar-$1)
+    (\cd $T; build/soong/soong_ui.bash --dumpvar-mode $1)
 }
 
 # check to see if the supplied product is one we can build
diff --git a/target/board/generic/BoardConfig.mk b/target/board/generic/BoardConfig.mk
index 8bb3ed0..331f082 100644
--- a/target/board/generic/BoardConfig.mk
+++ b/target/board/generic/BoardConfig.mk
@@ -34,7 +34,7 @@
 ifeq ($(HOST_OS),linux)
   ifeq ($(WITH_DEXPREOPT),)
     WITH_DEXPREOPT := true
-    WITH_DEXPREOPT_BOOT_IMG_ONLY := false
+    WITH_DEXPREOPT_BOOT_IMG_AND_SYSTEM_SERVER_ONLY := false
   endif
 endif
 
diff --git a/target/board/generic_arm64/BoardConfig.mk b/target/board/generic_arm64/BoardConfig.mk
index 2feba6b..d6df2cf 100644
--- a/target/board/generic_arm64/BoardConfig.mk
+++ b/target/board/generic_arm64/BoardConfig.mk
@@ -65,7 +65,7 @@
 ifeq ($(HOST_OS),linux)
   ifeq ($(WITH_DEXPREOPT),)
     WITH_DEXPREOPT := true
-    WITH_DEXPREOPT_BOOT_IMG_ONLY := false
+    WITH_DEXPREOPT_BOOT_IMG_AND_SYSTEM_SERVER_ONLY := false
   endif
 endif
 
diff --git a/target/board/generic_mips/BoardConfig.mk b/target/board/generic_mips/BoardConfig.mk
index a9e46b4..fb66d21 100644
--- a/target/board/generic_mips/BoardConfig.mk
+++ b/target/board/generic_mips/BoardConfig.mk
@@ -42,7 +42,7 @@
 ifeq ($(HOST_OS),linux)
   ifeq ($(WITH_DEXPREOPT),)
     WITH_DEXPREOPT := true
-    WITH_DEXPREOPT_BOOT_IMG_ONLY := false
+    WITH_DEXPREOPT_BOOT_IMG_AND_SYSTEM_SERVER_ONLY := false
   endif
 endif
 
diff --git a/target/board/generic_mips64/BoardConfig.mk b/target/board/generic_mips64/BoardConfig.mk
index 6cb6c11..67bb51f 100644
--- a/target/board/generic_mips64/BoardConfig.mk
+++ b/target/board/generic_mips64/BoardConfig.mk
@@ -57,7 +57,7 @@
 ifeq ($(HOST_OS),linux)
   ifeq ($(WITH_DEXPREOPT),)
     WITH_DEXPREOPT := true
-    WITH_DEXPREOPT_BOOT_IMG_ONLY := false
+    WITH_DEXPREOPT_BOOT_IMG_AND_SYSTEM_SERVER_ONLY := false
   endif
 endif
 
diff --git a/target/board/generic_x86/BoardConfig.mk b/target/board/generic_x86/BoardConfig.mk
index bb2166b..000a9a3 100644
--- a/target/board/generic_x86/BoardConfig.mk
+++ b/target/board/generic_x86/BoardConfig.mk
@@ -22,7 +22,7 @@
 # of an SDK AVD. Note that this operation only works on Linux for now
 ifeq ($(HOST_OS),linux)
 WITH_DEXPREOPT ?= true
-WITH_DEXPREOPT_BOOT_IMG_ONLY ?= false
+WITH_DEXPREOPT_BOOT_IMG_AND_SYSTEM_SERVER_ONLY ?= false
 endif
 
 TARGET_USES_HWC2 := true
diff --git a/target/board/generic_x86_64/BoardConfig.mk b/target/board/generic_x86_64/BoardConfig.mk
index b49a10c..883dd2e 100755
--- a/target/board/generic_x86_64/BoardConfig.mk
+++ b/target/board/generic_x86_64/BoardConfig.mk
@@ -28,7 +28,7 @@
 # of an SDK AVD. Note that this operation only works on Linux for now
 ifeq ($(HOST_OS),linux)
 WITH_DEXPREOPT ?= true
-WITH_DEXPREOPT_BOOT_IMG_ONLY ?= false
+WITH_DEXPREOPT_BOOT_IMG_AND_SYSTEM_SERVER_ONLY ?= false
 endif
 
 TARGET_USES_HWC2 := true
diff --git a/target/board/generic_x86_arm/BoardConfig.mk b/target/board/generic_x86_arm/BoardConfig.mk
index 4a2e159..847ad80 100644
--- a/target/board/generic_x86_arm/BoardConfig.mk
+++ b/target/board/generic_x86_arm/BoardConfig.mk
@@ -39,7 +39,7 @@
 ifeq ($(HOST_OS),linux)
   ifeq ($(WITH_DEXPREOPT),)
     WITH_DEXPREOPT := true
-    WITH_DEXPREOPT_BOOT_IMG_ONLY := false
+    WITH_DEXPREOPT_BOOT_IMG_AND_SYSTEM_SERVER_ONLY := false
   endif
 endif
 
diff --git a/target/product/base.mk b/target/product/base.mk
index 0e3647d..a182f18 100644
--- a/target/product/base.mk
+++ b/target/product/base.mk
@@ -150,7 +150,8 @@
 PRODUCT_PACKAGES_DEBUG := \
     logpersist.start \
     perfprofd \
-    sqlite3
+    sqlite3 \
+    strace
 
 PRODUCT_COPY_FILES := $(call add-to-product-copy-files-if-exists,\
     frameworks/base/config/preloaded-classes:system/etc/preloaded-classes)
diff --git a/target/product/core.mk b/target/product/core.mk
index a2b0f1c..cab8d97 100644
--- a/target/product/core.mk
+++ b/target/product/core.mk
@@ -45,7 +45,6 @@
     Launcher2 \
     ManagedProvisioning \
     MtpDocumentsProvider \
-    PicoTts \
     PacProcessor \
     libpac \
     PrintSpooler \
diff --git a/target/product/full_base.mk b/target/product/full_base.mk
index 65bdf0f..f2652eb 100644
--- a/target/product/full_base.mk
+++ b/target/product/full_base.mk
@@ -48,9 +48,6 @@
 # Get some sounds
 $(call inherit-product-if-exists, frameworks/base/data/sounds/AllAudio.mk)
 
-# Get the TTS language packs
-$(call inherit-product-if-exists, external/svox/pico/lang/all_pico_languages.mk)
-
 # Get a list of languages.
 $(call inherit-product, $(SRC_TARGET_DIR)/product/locales_full.mk)
 
diff --git a/target/product/sdk_base.mk b/target/product/sdk_base.mk
index 93356d6..44ee3f8 100644
--- a/target/product/sdk_base.mk
+++ b/target/product/sdk_base.mk
@@ -118,14 +118,6 @@
 $(call inherit-product-if-exists, frameworks/webview/chromium/chromium.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/product/core.mk)
 
-# include available languages for TTS in the system image
--include external/svox/pico/lang/PicoLangDeDeInSystem.mk
--include external/svox/pico/lang/PicoLangEnGBInSystem.mk
--include external/svox/pico/lang/PicoLangEnUsInSystem.mk
--include external/svox/pico/lang/PicoLangEsEsInSystem.mk
--include external/svox/pico/lang/PicoLangFrFrInSystem.mk
--include external/svox/pico/lang/PicoLangItItInSystem.mk
-
 # locale. en_US is both first and in alphabetical order to
 # ensure this is the default locale.
 PRODUCT_LOCALES := \
diff --git a/target/product/verity.mk b/target/product/verity.mk
index 0badb9f..d954159 100644
--- a/target/product/verity.mk
+++ b/target/product/verity.mk
@@ -14,20 +14,16 @@
 # limitations under the License.
 #
 
-# Provides dependencies necessary for verified boot (only for user and
-# userdebug builds)
+# Provides dependencies necessary for verified boot.
 
-user_variant := $(filter user userdebug,$(TARGET_BUILD_VARIANT))
-ifneq (,$(user_variant))
-    PRODUCT_SUPPORTS_BOOT_SIGNER := true
-    PRODUCT_SUPPORTS_VERITY := true
-    PRODUCT_SUPPORTS_VERITY_FEC := true
+PRODUCT_SUPPORTS_BOOT_SIGNER := true
+PRODUCT_SUPPORTS_VERITY := true
+PRODUCT_SUPPORTS_VERITY_FEC := true
 
-    # The dev key is used to sign boot and recovery images, and the verity
-    # metadata table. Actual product deliverables will be re-signed by hand.
-    # We expect this file to exist with the suffixes ".x509.pem" and ".pk8".
-    PRODUCT_VERITY_SIGNING_KEY := build/target/product/security/verity
+# The dev key is used to sign boot and recovery images, and the verity
+# metadata table. Actual product deliverables will be re-signed by hand.
+# We expect this file to exist with the suffixes ".x509.pem" and ".pk8".
+PRODUCT_VERITY_SIGNING_KEY := build/target/product/security/verity
 
-    PRODUCT_PACKAGES += \
-            verity_key
-endif
+PRODUCT_PACKAGES += \
+        verity_key
diff --git a/tools/post_process_props.py b/tools/post_process_props.py
index 83c6f9a..2d9451e 100755
--- a/tools/post_process_props.py
+++ b/tools/post_process_props.py
@@ -64,7 +64,7 @@
   buildprops = prop.to_dict()
   for key, value in buildprops.iteritems():
     # Check build properties' length.
-    if len(value) > PROP_VALUE_MAX:
+    if len(value) > PROP_VALUE_MAX and not key.startswith("ro."):
       check_pass = False
       sys.stderr.write("error: %s cannot exceed %d bytes: " %
                        (key, PROP_VALUE_MAX))
diff --git a/tools/releasetools/build_image.py b/tools/releasetools/build_image.py
index 3f976da..a388f8a 100755
--- a/tools/releasetools/build_image.py
+++ b/tools/releasetools/build_image.py
@@ -225,12 +225,15 @@
   return True
 
 def BuildVerityMetadata(image_size, verity_metadata_path, root_hash, salt,
-                        block_device, signer_path, key, signer_args):
+                        block_device, signer_path, key, signer_args,
+                        verity_disable):
   cmd = ["system/extras/verity/build_verity_metadata.py", "build",
          str(image_size), verity_metadata_path, root_hash, salt, block_device,
          signer_path, key]
   if signer_args:
     cmd.append("--signer_args=\"%s\"" % (' '.join(signer_args),))
+  if verity_disable:
+    cmd.append("--verity_disable")
   output, exit_code = RunCommand(cmd)
   if exit_code != 0:
     print "Could not build verity metadata! Error: %s" % output
@@ -334,8 +337,10 @@
   # build the metadata blocks
   root_hash = prop_dict["verity_root_hash"]
   salt = prop_dict["verity_salt"]
+  verity_disable = "verity_disable" in prop_dict
   if not BuildVerityMetadata(image_size, verity_metadata_path, root_hash, salt,
-                             block_dev, signer_path, signer_key, signer_args):
+                             block_dev, signer_path, signer_key, signer_args,
+                             verity_disable):
     shutil.rmtree(tempdir_name, ignore_errors=True)
     return False
 
@@ -650,6 +655,7 @@
       "verity_key",
       "verity_signer_cmd",
       "verity_fec",
+      "verity_disable",
       "avb_enable",
       "avb_avbtool",
       "avb_salt",
diff --git a/tools/signapk/Android.mk b/tools/signapk/Android.mk
index 051a51d..8082842 100644
--- a/tools/signapk/Android.mk
+++ b/tools/signapk/Android.mk
@@ -23,9 +23,9 @@
 LOCAL_JAR_MANIFEST := SignApk.mf
 LOCAL_STATIC_JAVA_LIBRARIES := \
     apksig \
-    bouncycastle-host \
-    bouncycastle-bcpkix-host \
-    conscrypt-host
+    bouncycastle \
+    bouncycastle-bcpkix \
+    conscrypt
 LOCAL_REQUIRED_MODULES := libconscrypt_openjdk_jni
 include $(BUILD_HOST_JAVA_LIBRARY)
 
diff --git a/tools/signtos/Android.mk b/tools/signtos/Android.mk
index 94ab944..3e869b3 100644
--- a/tools/signtos/Android.mk
+++ b/tools/signtos/Android.mk
@@ -21,5 +21,5 @@
 LOCAL_MODULE := signtos
 LOCAL_SRC_FILES := SignTos.java
 LOCAL_JAR_MANIFEST := SignTos.mf
-LOCAL_STATIC_JAVA_LIBRARIES := bouncycastle-host bouncycastle-bcpkix-host
+LOCAL_STATIC_JAVA_LIBRARIES := bouncycastle bouncycastle-bcpkix
 include $(BUILD_HOST_JAVA_LIBRARY)