diff --git a/CleanSpec.mk b/CleanSpec.mk
index 897524b..64d84e3 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -329,6 +329,11 @@
 # instead.
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 
+# On to MNC
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/*)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/APPS/*)
+
 # Adding dalvik.vm.usejit
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/root/default.prop)
@@ -349,12 +354,21 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/root/default.prop)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/recovery/root/default.prop)
 
-# 5.1.1!
+# Change PLATFORM_VERSION from MNC to M
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/*)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/APPS/*)
 
-# Added new build props
+# 23 is becoming alive!!!
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/*)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/APPS/*)
+
+# 23 is becoming more alive!!!
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/*)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/APPS/*)
+
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 
 # ************************************************
diff --git a/core/Makefile b/core/Makefile
index 572b269..becd51d 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -67,7 +67,9 @@
 ADDITIONAL_DEFAULT_PROPERTIES := $(call uniq-pairs-by-first-component, \
     $(ADDITIONAL_DEFAULT_PROPERTIES),=)
 
-$(INSTALLED_DEFAULT_PROP_TARGET):
+intermediate_system_build_prop := $(call intermediates-dir-for,ETC,system_build_prop)/build.prop
+
+$(INSTALLED_DEFAULT_PROP_TARGET): $(intermediate_system_build_prop)
 	@echo Target buildinfo: $@
 	@mkdir -p $(dir $@)
 	$(hide) echo "#" > $@; \
@@ -75,7 +77,13 @@
 	        echo "#" >> $@;
 	$(hide) $(foreach line,$(ADDITIONAL_DEFAULT_PROPERTIES), \
 		echo "$(line)" >> $@;)
-	build/tools/post_process_props.py $@
+	$(hide) echo "#" >> $@; \
+	        echo "# BOOTIMAGE_BUILD_PROPERTIES" >> $@; \
+	        echo "#" >> $@;
+	$(hide) echo ro.bootimage.build.date=`date`>>$@
+	$(hide) echo ro.bootimage.build.date.utc=`date +%s`>>$@
+	$(hide) echo ro.bootimage.build.fingerprint="$(BUILD_FINGERPRINT)">>$@
+	$(hide) build/tools/post_process_props.py $@
 
 # -----------------------------------------------------------------
 # build.prop
@@ -107,7 +115,7 @@
 
 # A human-readable string that descibes this build in detail.
 build_desc := $(TARGET_PRODUCT)-$(TARGET_BUILD_VARIANT) $(PLATFORM_VERSION) $(BUILD_ID) $(BUILD_NUMBER) $(BUILD_VERSION_TAGS)
-$(INSTALLED_BUILD_PROP_TARGET): PRIVATE_BUILD_DESC := $(build_desc)
+$(intermediate_system_build_prop): PRIVATE_BUILD_DESC := $(build_desc)
 
 # The string used to uniquely identify the combined build and product; used by the OTA server.
 ifeq (,$(strip $(BUILD_FINGERPRINT)))
@@ -171,7 +179,7 @@
 else
 system_prop_file := $(wildcard $(TARGET_DEVICE_DIR)/system.prop)
 endif
-$(INSTALLED_BUILD_PROP_TARGET): $(BUILDINFO_SH) $(INTERNAL_BUILD_ID_MAKEFILE) $(BUILD_SYSTEM)/version_defaults.mk $(system_prop_file) $(INSTALLED_ANDROID_INFO_TXT_TARGET)
+$(intermediate_system_build_prop): $(BUILDINFO_SH) $(INTERNAL_BUILD_ID_MAKEFILE) $(BUILD_SYSTEM)/version_defaults.mk $(system_prop_file) $(INSTALLED_ANDROID_INFO_TXT_TARGET)
 	@echo Target buildinfo: $@
 	@mkdir -p $(dir $@)
 	$(hide) echo > $@
@@ -199,6 +207,7 @@
 			PLATFORM_SECURITY_PATCH="$(PLATFORM_SECURITY_PATCH)" \
 			PLATFORM_BASE_OS="$(PLATFORM_BASE_OS)" \
 			PLATFORM_SDK_VERSION="$(PLATFORM_SDK_VERSION)" \
+			PLATFORM_PREVIEW_SDK_VERSION="$(PLATFORM_PREVIEW_SDK_VERSION)" \
 			PLATFORM_VERSION_CODENAME="$(PLATFORM_VERSION_CODENAME)" \
 			PLATFORM_VERSION_ALL_CODENAMES="$(PLATFORM_VERSION_ALL_CODENAMES)" \
 			BUILD_VERSION_TAGS="$(BUILD_VERSION_TAGS)" \
@@ -233,6 +242,19 @@
 
 build_desc :=
 
+ifeq (,$(filter true, $(TARGET_NO_KERNEL) $(TARGET_NO_RECOVERY)))
+INSTALLED_RECOVERYIMAGE_TARGET := $(PRODUCT_OUT)/recovery.img
+else
+INSTALLED_RECOVERYIMAGE_TARGET :=
+endif
+
+$(INSTALLED_BUILD_PROP_TARGET): $(intermediate_system_build_prop) $(INSTALLED_RECOVERYIMAGE_TARGET)
+	@echo "Target build info: $@"
+	$(hide) cat $(intermediate_system_build_prop) > $@
+ifdef INSTALLED_RECOVERYIMAGE_TARGET
+	$(hide) echo ro.expect.recovery_id=`cat $(RECOVERYIMAGE_ID_FILE)` >> $@
+endif
+
 # -----------------------------------------------------------------
 # vendor build.prop
 #
@@ -250,19 +272,6 @@
 endif
 
 # ----------------------------------------------------------------
-# boot.img build.prop
-# as with vendor build.prop above, for verifying that the bootimage
-# build is what we think it is
-
-INSTALLED_BOOTIMAGE_BUILD_PROP_TARGET := $(TARGET_ROOT_OUT)/build.prop
-ALL_DEFAULT_INSTALLED_MODULES += $(INSTALLED_BOOTIMAGE_BUILD_PROP_TARGET)
-$(INSTALLED_BOOTIMAGE_BUILD_PROP_TARGET): $(INSTALLED_BUILD_PROP_TARGET)
-	@echo Target bootimage buildinfo: $@
-	@mkdir -p $(dir $@)
-	$(hide) echo > $@
-	$(hide) echo ro.bootimage.build.date=`date`>>$@
-	$(hide) echo ro.bootimage.build.date.utc=`date +%s`>>$@
-	$(hide) echo ro.bootimage.build.fingerprint="$(BUILD_FINGERPRINT)">>$@
 
 # -----------------------------------------------------------------
 # sdk-build.prop
@@ -453,12 +462,12 @@
 INSTALLED_RAMDISK_TARGET := $(BUILT_RAMDISK_TARGET)
 $(INSTALLED_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_RAMDISK_FILES) | $(MINIGZIP)
 	$(call pretty,"Target ram disk: $@")
-	$(hide) $(MKBOOTFS) $(TARGET_ROOT_OUT) | $(MINIGZIP) > $@
+	$(hide) $(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_ROOT_OUT) | $(MINIGZIP) > $@
 
 .PHONY: ramdisk-nodeps
 ramdisk-nodeps: $(MKBOOTFS) | $(MINIGZIP)
 	@echo "make $@: ignoring dependencies"
-	$(hide) $(MKBOOTFS) $(TARGET_ROOT_OUT) | $(MINIGZIP) > $(INSTALLED_RAMDISK_TARGET)
+	$(hide) $(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_ROOT_OUT) | $(MINIGZIP) > $(INSTALLED_RAMDISK_TARGET)
 
 ifneq ($(strip $(TARGET_NO_KERNEL)),true)
 
@@ -466,8 +475,12 @@
 # the boot image, which is a collection of other images.
 INTERNAL_BOOTIMAGE_ARGS := \
 	$(addprefix --second ,$(INSTALLED_2NDBOOTLOADER_TARGET)) \
-	--kernel $(INSTALLED_KERNEL_TARGET) \
-	--ramdisk $(INSTALLED_RAMDISK_TARGET)
+	--kernel $(INSTALLED_KERNEL_TARGET)
+
+ifneq ($(BOARD_BUILD_SYSTEM_ROOT_IMAGE),true)
+INTERNAL_BOOTIMAGE_ARGS += --ramdisk $(INSTALLED_RAMDISK_TARGET)
+endif
+
 
 INTERNAL_BOOTIMAGE_FILES := $(filter-out --%,$(INTERNAL_BOOTIMAGE_ARGS))
 
@@ -490,7 +503,7 @@
 
 ifeq ($(TARGET_BOOTIMAGE_USE_EXT2),true)
 $(error TARGET_BOOTIMAGE_USE_EXT2 is not supported anymore)
-else ifeq (true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY)) # TARGET_BOOTIMAGE_USE_EXT2 != true
+else ifeq (true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_BOOT_SIGNER)) # TARGET_BOOTIMAGE_USE_EXT2 != true
 
 $(INSTALLED_BOOTIMAGE_TARGET): $(MKBOOTIMG) $(INTERNAL_BOOTIMAGE_FILES) $(BOOT_SIGNER)
 	$(call pretty,"Target boot image: $@")
@@ -505,7 +518,22 @@
 	$(BOOT_SIGNER) /boot $(INSTALLED_BOOTIMAGE_TARGET) $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VERITY_SIGNING_KEY).pk8 $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VERITY_SIGNING_KEY).x509.pem $(INSTALLED_BOOTIMAGE_TARGET)
 	$(hide) $(call assert-max-image-size,$(INSTALLED_BOOTIMAGE_TARGET),$(BOARD_BOOTIMAGE_PARTITION_SIZE))
 
-else # PRODUCT_SUPPORTS_VERITY != true
+else ifeq (true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT)) # PRODUCT_SUPPORTS_BOOT_SIGNER != true
+
+$(INSTALLED_BOOTIMAGE_TARGET): $(MKBOOTIMG) $(INTERNAL_BOOTIMAGE_FILES) $(VBOOT_SIGNER)
+	$(call pretty,"Target boot image: $@")
+	$(hide) $(MKBOOTIMG) $(INTERNAL_BOOTIMAGE_ARGS) $(BOARD_MKBOOTIMG_ARGS) --output $@.unsigned
+	$(VBOOT_SIGNER) $(FUTILITY) $@.unsigned $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VBOOT_SIGNING_KEY).vbpubk $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VBOOT_SIGNING_KEY).vbprivk $@.keyblock $@
+	$(hide) $(call assert-max-image-size,$@,$(BOARD_BOOTIMAGE_PARTITION_SIZE))
+
+.PHONY: bootimage-nodeps
+bootimage-nodeps: $(MKBOOTIMG) $(VBOOT_SIGNER)
+	@echo "make $@: ignoring dependencies"
+	$(hide) $(MKBOOTIMG) $(INTERNAL_BOOTIMAGE_ARGS) $(BOARD_MKBOOTIMG_ARGS) --output $(INSTALLED_BOOTIMAGE_TARGET).unsigned
+	$(VBOOT_SIGNER) $(FUTILITY) $(INSTALLED_BOOTIMAGE_TARGET).unsigned $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VBOOT_SIGNING_KEY).vbpubk $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VBOOT_SIGNING_KEY).vbprivk $(INSTALLED_BOOTIMAGE_TARGET).keyblock $(INSTALLED_BOOTIMAGE_TARGET)
+	$(hide) $(call assert-max-image-size,$(INSTALLED_BOOTIMAGE_TARGET),$(BOARD_BOOTIMAGE_PARTITION_SIZE))
+
+else # PRODUCT_SUPPORTS_VBOOT != true
 
 $(INSTALLED_BOOTIMAGE_TARGET): $(MKBOOTIMG) $(INTERNAL_BOOTIMAGE_FILES)
 	$(call pretty,"Target boot image: $@")
@@ -684,7 +712,7 @@
 endif
 
 ifeq ($(BOARD_SYSTEMIMAGE_FILE_SYSTEM_TYPE),squashfs)
-INTERNAL_USERIMAGES_DEPS += $(MAKE_SQUASHFS) $(MKSQUASHFSUSERIMG)
+INTERNAL_USERIMAGES_DEPS += $(MAKE_SQUASHFS) $(MKSQUASHFSUSERIMG) $(IMG2SIMG)
 endif
 
 ifeq ($(BOARD_SYSTEMIMAGE_FILE_SYSTEM_TYPE),squashfs)
@@ -707,6 +735,7 @@
 $(if $(BOARD_SYSTEMIMAGE_PARTITION_SIZE),$(hide) echo "system_size=$(BOARD_SYSTEMIMAGE_PARTITION_SIZE)" >> $(1))
 $(if $(BOARD_SYSTEMIMAGE_FILE_SYSTEM_TYPE),$(hide) echo "system_fs_type=$(BOARD_SYSTEMIMAGE_FILE_SYSTEM_TYPE)" >> $(1))
 $(if $(BOARD_SYSTEMIMAGE_JOURNAL_SIZE),$(hide) echo "system_journal_size=$(BOARD_SYSTEMIMAGE_JOURNAL_SIZE)" >> $(1))
+$(if $(BOARD_HAS_EXT4_RESERVED_BLOCKS),$(hide) echo "has_ext4_reserved_blocks=$(BOARD_HAS_EXT4_RESERVED_BLOCKS)" >> $(1))
 $(if $(BOARD_SYSTEMIMAGE_SQUASHFS_COMPRESSOR),$(hide) echo "system_squashfs_compressor=$(BOARD_SYSTEMIMAGE_SQUASHFS_COMPRESSOR)" >> $(1))
 $(if $(BOARD_SYSTEMIMAGE_SQUASHFS_COMPRESSOR_OPT),$(hide) echo "system_squashfs_compressor_opt=$(BOARD_SYSTEMIMAGE_SQUASHFS_COMPRESSOR_OPT)" >> $(1))
 $(if $(BOARD_USERDATAIMAGE_FILE_SYSTEM_TYPE),$(hide) echo "userdata_fs_type=$(BOARD_USERDATAIMAGE_FILE_SYSTEM_TYPE)" >> $(1))
@@ -720,6 +749,7 @@
 $(if $(BOARD_OEMIMAGE_JOURNAL_SIZE),$(hide) echo "oem_journal_size=$(BOARD_OEMIMAGE_JOURNAL_SIZE)" >> $(1))
 $(if $(INTERNAL_USERIMAGES_SPARSE_EXT_FLAG),$(hide) echo "extfs_sparse_flag=$(INTERNAL_USERIMAGES_SPARSE_EXT_FLAG)" >> $(1))
 $(hide) echo "selinux_fc=$(SELINUX_FC)" >> $(1)
+$(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_BOOT_SIGNER),$(hide) echo "boot_signer=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_BOOT_SIGNER)" >> $(1))
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY),$(hide) echo "verity=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY)" >> $(1))
 $(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),$(hide) echo "verity_signer_cmd=$(VERITY_SIGNER)" >> $(1))
@@ -738,10 +768,7 @@
 # -----------------------------------------------------------------
 # Recovery image
 
-# If neither TARGET_NO_KERNEL nor TARGET_NO_RECOVERY are true
-ifeq (,$(filter true, $(TARGET_NO_KERNEL) $(TARGET_NO_RECOVERY)))
-
-INSTALLED_RECOVERYIMAGE_TARGET := $(PRODUCT_OUT)/recovery.img
+ifdef INSTALLED_RECOVERYIMAGE_TARGET
 
 INTERNAL_RECOVERYIMAGE_FILES := $(filter $(TARGET_RECOVERY_OUT)/%, \
     $(ALL_DEFAULT_INSTALLED_MODULES))
@@ -750,7 +777,7 @@
 recovery_sepolicy := $(call intermediates-dir-for,ETC,sepolicy.recovery)/sepolicy.recovery
 recovery_kernel := $(INSTALLED_KERNEL_TARGET) # same as a non-recovery system
 recovery_ramdisk := $(PRODUCT_OUT)/ramdisk-recovery.img
-recovery_build_prop := $(INSTALLED_BUILD_PROP_TARGET)
+recovery_build_prop := $(intermediate_system_build_prop)
 recovery_resources_common := $(call include-path-for, recovery)/res
 
 # Set recovery_density to the density bucket of the device.
@@ -834,6 +861,7 @@
 	@mkdir -p $(dir $@)
 	java -jar $(DUMPKEY_JAR) $(PRIVATE_OTA_PUBLIC_KEYS) $(extra_keys) > $@
 
+RECOVERYIMAGE_ID_FILE := $(PRODUCT_OUT)/recovery.id
 # $(1): output file
 define build-recoveryimage-target
   @echo ----- Making recovery image ------
@@ -858,11 +886,11 @@
   $(hide) cp $(RECOVERY_INSTALL_OTA_KEYS) $(TARGET_RECOVERY_ROOT_OUT)/res/keys
   $(hide) cat $(INSTALLED_DEFAULT_PROP_TARGET) $(recovery_build_prop) \
           > $(TARGET_RECOVERY_ROOT_OUT)/default.prop
-  $(hide) $(MKBOOTFS) $(TARGET_RECOVERY_ROOT_OUT) | $(MINIGZIP) > $(recovery_ramdisk)
+  $(hide) $(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_RECOVERY_ROOT_OUT) | $(MINIGZIP) > $(recovery_ramdisk)
   $(if $(filter true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT)), \
     $(hide) $(MKBOOTIMG) $(INTERNAL_RECOVERYIMAGE_ARGS) $(BOARD_MKBOOTIMG_ARGS) --output $(1).unsigned, \
-    $(hide) $(MKBOOTIMG) $(INTERNAL_RECOVERYIMAGE_ARGS) $(BOARD_MKBOOTIMG_ARGS) --output $(1))
-  $(if $(filter true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY)),\
+    $(hide) $(MKBOOTIMG) $(INTERNAL_RECOVERYIMAGE_ARGS) $(BOARD_MKBOOTIMG_ARGS) --output $(1) --id > $(RECOVERYIMAGE_ID_FILE))
+  $(if $(filter true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_BOOT_SIGNER)),\
     $(BOOT_SIGNER) /recovery $(1) $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VERITY_SIGNING_KEY).pk8 $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VERITY_SIGNING_KEY).x509.pem $(1))
   $(if $(filter true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT)), \
     $(VBOOT_SIGNER) $(FUTILITY) $(1).unsigned $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VBOOT_SIGNING_KEY).vbpubk $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VBOOT_SIGNING_KEY).vbprivk $(1).keyblock $(1))
@@ -891,7 +919,6 @@
 	$(call build-recoveryimage-target, $(INSTALLED_RECOVERYIMAGE_TARGET))
 
 else
-INSTALLED_RECOVERYIMAGE_TARGET :=
 RECOVERY_RESOURCE_ZIP :=
 endif
 
@@ -970,10 +997,18 @@
       skip_fsck=true)
   $(hide) PATH=$(foreach p,$(INTERNAL_USERIMAGES_BINARY_PATHS),$(p):)$$PATH \
       ./build/tools/releasetools/build_image.py \
-      $(TARGET_OUT) $(systemimage_intermediates)/system_image_info.txt $(1) \
+      $(TARGET_OUT) $(systemimage_intermediates)/system_image_info.txt $(1) $(TARGET_OUT) \
       || ( echo "Out of space? the tree size of $(TARGET_OUT) is (MB): " 1>&2 ;\
            du -sm $(TARGET_OUT) 1>&2;\
-           echo "The max is $$(( $(BOARD_SYSTEMIMAGE_PARTITION_SIZE) / 1048576 )) MB." 1>&2 ;\
+           if [ "$(INTERNAL_USERIMAGES_EXT_VARIANT)" == "ext4" ]; then \
+               maxsize=$(BOARD_SYSTEMIMAGE_PARTITION_SIZE); \
+               if [ "$(BOARD_HAS_EXT4_RESERVED_BLOCKS)" == "true" ]; then \
+                   maxsize=$$((maxsize - 4096 * 4096)); \
+               fi; \
+               echo "The max is $$(( maxsize / 1048576 )) MB." 1>&2 ;\
+           else \
+               echo "The max is $$(( $(BOARD_SYSTEMIMAGE_PARTITION_SIZE) / 1048576 )) MB." 1>&2 ;\
+           fi; \
            mkdir -p $(DIST_DIR); cp $(INSTALLED_FILES_FILE) $(DIST_DIR)/installed-files-rescued.txt; \
            exit 1 )
 endef
@@ -1029,7 +1064,7 @@
   $(call create-system-vendor-symlink)
   $(MKTARBALL) $(FS_GET_STATS) \
     $(PRODUCT_OUT) system $(PRIVATE_SYSTEM_TAR) \
-    $(INSTALLED_SYSTEMTARBALL_TARGET)
+    $(INSTALLED_SYSTEMTARBALL_TARGET) $(TARGET_OUT)
 endef
 
 ifndef SYSTEM_TARBALL_FORMAT
@@ -1097,7 +1132,7 @@
     $(hide) echo $(BOARD_KERNEL_CMDLINE) > $(PRODUCT_OUT)/boot/cmdline
     $(hide) $(MKTARBALL) $(FS_GET_STATS) \
                  $(PRODUCT_OUT) boot $(PRIVATE_BOOT_TAR) \
-                 $(INSTALLED_BOOTTARBALL_TARGET)
+                 $(INSTALLED_BOOTTARBALL_TARGET) $(TARGET_OUT)
 endef
 
 ifndef BOOT_TARBALL_FORMAT
@@ -1141,7 +1176,7 @@
   $(call generate-userimage-prop-dictionary, $(userdataimage_intermediates)/userdata_image_info.txt, skip_fsck=true)
   $(hide) PATH=$(foreach p,$(INTERNAL_USERIMAGES_BINARY_PATHS),$(p):)$$PATH \
       ./build/tools/releasetools/build_image.py \
-      $(TARGET_OUT_DATA) $(userdataimage_intermediates)/userdata_image_info.txt $(INSTALLED_USERDATAIMAGE_TARGET)
+      $(TARGET_OUT_DATA) $(userdataimage_intermediates)/userdata_image_info.txt $(INSTALLED_USERDATAIMAGE_TARGET) $(TARGET_OUT)
   $(hide) $(call assert-max-image-size,$(INSTALLED_USERDATAIMAGE_TARGET),$(BOARD_USERDATAIMAGE_PARTITION_SIZE))
 endef
 
@@ -1165,7 +1200,7 @@
                   "$(INSTALLED_USERDATATARBALL_TARGET)")
     $(MKTARBALL) $(FS_GET_STATS) \
 		$(PRODUCT_OUT) data $(PRIVATE_USERDATA_TAR) \
-		$(INSTALLED_USERDATATARBALL_TARGET)
+		$(INSTALLED_USERDATATARBALL_TARGET) $(TARGET_OUT)
 endef
 
 userdata_tar := $(PRODUCT_OUT)/userdata.tar
@@ -1196,7 +1231,7 @@
   $(call generate-userimage-prop-dictionary, $(cacheimage_intermediates)/cache_image_info.txt, skip_fsck=true)
   $(hide) PATH=$(foreach p,$(INTERNAL_USERIMAGES_BINARY_PATHS),$(p):)$$PATH \
       ./build/tools/releasetools/build_image.py \
-      $(TARGET_OUT_CACHE) $(cacheimage_intermediates)/cache_image_info.txt $(INSTALLED_CACHEIMAGE_TARGET)
+      $(TARGET_OUT_CACHE) $(cacheimage_intermediates)/cache_image_info.txt $(INSTALLED_CACHEIMAGE_TARGET) $(TARGET_OUT)
   $(hide) $(call assert-max-image-size,$(INSTALLED_CACHEIMAGE_TARGET),$(BOARD_CACHEIMAGE_PARTITION_SIZE))
 endef
 
@@ -1234,7 +1269,7 @@
   $(call generate-userimage-prop-dictionary, $(vendorimage_intermediates)/vendor_image_info.txt, skip_fsck=true)
   $(hide) PATH=$(foreach p,$(INTERNAL_USERIMAGES_BINARY_PATHS),$(p):)$$PATH \
       ./build/tools/releasetools/build_image.py \
-      $(TARGET_OUT_VENDOR) $(vendorimage_intermediates)/vendor_image_info.txt $(INSTALLED_VENDORIMAGE_TARGET)
+      $(TARGET_OUT_VENDOR) $(vendorimage_intermediates)/vendor_image_info.txt $(INSTALLED_VENDORIMAGE_TARGET) $(TARGET_OUT)
   $(hide) $(call assert-max-image-size,$(INSTALLED_VENDORIMAGE_TARGET),$(BOARD_VENDORIMAGE_PARTITION_SIZE))
 endef
 
@@ -1275,6 +1310,7 @@
   $(HOST_OUT_EXECUTABLES)/build_verity_tree \
   $(HOST_OUT_EXECUTABLES)/verity_signer \
   $(HOST_OUT_EXECUTABLES)/append2simg \
+  $(HOST_OUT_EXECUTABLES)/img2simg \
   $(HOST_OUT_EXECUTABLES)/boot_signer
 
 # Shared libraries.
@@ -1282,7 +1318,15 @@
   $(HOST_LIBRARY_PATH)/libc++$(HOST_SHLIB_SUFFIX) \
   $(HOST_LIBRARY_PATH)/liblog$(HOST_SHLIB_SUFFIX) \
   $(HOST_LIBRARY_PATH)/libcutils$(HOST_SHLIB_SUFFIX) \
-  $(HOST_LIBRARY_PATH)/libselinux$(HOST_SHLIB_SUFFIX)
+  $(HOST_LIBRARY_PATH)/libselinux$(HOST_SHLIB_SUFFIX) \
+  $(HOST_LIBRARY_PATH)/libcrypto-host$(HOST_SHLIB_SUFFIX) \
+  $(HOST_LIBRARY_PATH)/libext2fs_host$(HOST_SHLIB_SUFFIX) \
+  $(HOST_LIBRARY_PATH)/libext2_blkid_host$(HOST_SHLIB_SUFFIX) \
+  $(HOST_LIBRARY_PATH)/libext2_com_err_host$(HOST_SHLIB_SUFFIX) \
+  $(HOST_LIBRARY_PATH)/libext2_e2p_host$(HOST_SHLIB_SUFFIX) \
+  $(HOST_LIBRARY_PATH)/libext2_profile_host$(HOST_SHLIB_SUFFIX) \
+  $(HOST_LIBRARY_PATH)/libext2_quota_host$(HOST_SHLIB_SUFFIX) \
+  $(HOST_LIBRARY_PATH)/libext2_uuid_host$(HOST_SHLIB_SUFFIX)
 
 OTATOOLS := $(DISTTOOLS) \
   $(HOST_OUT_EXECUTABLES)/aapt
@@ -1447,6 +1491,9 @@
 ifdef BOARD_RECOVERYIMAGE_PARTITION_SIZE
 	$(hide) echo "recovery_size=$(BOARD_RECOVERYIMAGE_PARTITION_SIZE)" >> $(zip_root)/META/misc_info.txt
 endif
+ifdef BOARD_HAS_EXT4_RESERVED_BLOCKS
+	$(hide) echo "has_ext4_reserved_blocks=$(BOARD_HAS_EXT4_RESERVED_BLOCKS)" >> $(zip_root)/META/misc_info.txt
+endif
 ifdef TARGET_RECOVERY_FSTYPE_MOUNT_OPTIONS
 	@# TARGET_RECOVERY_FSTYPE_MOUNT_OPTIONS can be empty to indicate that nothing but defaults should be used.
 	$(hide) echo "recovery_mount_options=$(TARGET_RECOVERY_FSTYPE_MOUNT_OPTIONS)" >> $(zip_root)/META/misc_info.txt
@@ -1462,7 +1509,7 @@
 	$(hide) echo "use_set_metadata=1" >> $(zip_root)/META/misc_info.txt
 	$(hide) echo "multistage_support=1" >> $(zip_root)/META/misc_info.txt
 	$(hide) echo "update_rename_support=1" >> $(zip_root)/META/misc_info.txt
-	$(hide) echo "blockimgdiff_versions=1,2" >> $(zip_root)/META/misc_info.txt
+	$(hide) echo "blockimgdiff_versions=1,2,3" >> $(zip_root)/META/misc_info.txt
 ifneq ($(OEM_THUMBPRINT_PROPERTIES),)
 	# OTA scripts are only interested in fingerprint related properties
 	$(hide) echo "oem_fingerprint_properties=$(OEM_THUMBPRINT_PROPERTIES)" >> $(zip_root)/META/misc_info.txt
@@ -1474,10 +1521,10 @@
 	$(hide) (cd $(zip_root) && zip -qry ../$(notdir $@) .)
 	@# Run fs_config on all the system, vendor, boot ramdisk,
 	@# and recovery ramdisk files in the zip, and save the output
-	$(hide) zipinfo -1 $@ | awk 'BEGIN { FS="SYSTEM/" } /^SYSTEM\// {print "system/" $$2}' | $(HOST_OUT_EXECUTABLES)/fs_config -C -S $(SELINUX_FC) > $(zip_root)/META/filesystem_config.txt
-	$(hide) zipinfo -1 $@ | awk 'BEGIN { FS="VENDOR/" } /^VENDOR\// {print "vendor/" $$2}' | $(HOST_OUT_EXECUTABLES)/fs_config -C -S $(SELINUX_FC) > $(zip_root)/META/vendor_filesystem_config.txt
-	$(hide) zipinfo -1 $@ | awk 'BEGIN { FS="BOOT/RAMDISK/" } /^BOOT\/RAMDISK\// {print $$2}' | $(HOST_OUT_EXECUTABLES)/fs_config -C -S $(SELINUX_FC) > $(zip_root)/META/boot_filesystem_config.txt
-	$(hide) zipinfo -1 $@ | awk 'BEGIN { FS="RECOVERY/RAMDISK/" } /^RECOVERY\/RAMDISK\// {print $$2}' | $(HOST_OUT_EXECUTABLES)/fs_config -C -S $(SELINUX_FC) > $(zip_root)/META/recovery_filesystem_config.txt
+	$(hide) zipinfo -1 $@ | awk 'BEGIN { FS="SYSTEM/" } /^SYSTEM\// {print "system/" $$2}' | $(HOST_OUT_EXECUTABLES)/fs_config -C -D $(TARGET_OUT) -S $(SELINUX_FC) > $(zip_root)/META/filesystem_config.txt
+	$(hide) zipinfo -1 $@ | awk 'BEGIN { FS="VENDOR/" } /^VENDOR\// {print "vendor/" $$2}' | $(HOST_OUT_EXECUTABLES)/fs_config -C -D $(TARGET_OUT) -S $(SELINUX_FC) > $(zip_root)/META/vendor_filesystem_config.txt
+	$(hide) zipinfo -1 $@ | awk 'BEGIN { FS="BOOT/RAMDISK/" } /^BOOT\/RAMDISK\// {print $$2}' | $(HOST_OUT_EXECUTABLES)/fs_config -C -D $(TARGET_OUT) -S $(SELINUX_FC) > $(zip_root)/META/boot_filesystem_config.txt
+	$(hide) zipinfo -1 $@ | awk 'BEGIN { FS="RECOVERY/RAMDISK/" } /^RECOVERY\/RAMDISK\// {print $$2}' | $(HOST_OUT_EXECUTABLES)/fs_config -C -D $(TARGET_OUT) -S $(SELINUX_FC) > $(zip_root)/META/recovery_filesystem_config.txt
 	$(hide) (cd $(zip_root) && zip -q ../$(notdir $@) META/*filesystem_config.txt)
 	$(hide) PATH=$(foreach p,$(INTERNAL_USERIMAGES_BINARY_PATHS),$(p):)$$PATH MKBOOTIMG=$(MKBOOTIMG) \
 	    ./build/tools/releasetools/add_img_to_target_files -p $(HOST_OUT) $@
diff --git a/core/base_rules.mk b/core/base_rules.mk
index d4c9a06..ea64cc6 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -382,7 +382,7 @@
 # LOCAL_SOURCE_FILES_ALL_GENERATED is set only if the module does not have static source files,
 # but generated source files in its LOCAL_INTERMEDIATE_SOURCE_DIR.
 # You have to set up the dependency in some other way.
-need_compile_java := $(strip $(all_java_sources)$(all_res_assets))$(LOCAL_STATIC_JAVA_LIBRARIES)$(filter true,$(LOCAL_SOURCE_FILES_ALL_GENERATED))
+need_compile_java := $(strip $(all_java_sources)$(all_res_assets)$(java_resource_sources))$(LOCAL_STATIC_JAVA_LIBRARIES)$(filter true,$(LOCAL_SOURCE_FILES_ALL_GENERATED))
 ifdef need_compile_java
 
 full_static_java_libs := \
@@ -420,10 +420,11 @@
 #                 be up-to-date.
 ifdef LOCAL_IS_HOST_MODULE
 ifeq ($(USE_CORE_LIB_BOOTCLASSPATH),true)
-$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH := -bootclasspath $(call java-lib-deps,core-libart-hostdex,$(LOCAL_IS_HOST_MODULE))
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH := -bootclasspath $(call java-lib-files,core-libart-hostdex,$(LOCAL_IS_HOST_MODULE))
 
 full_shared_java_libs := $(call java-lib-files,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
-full_java_lib_deps := $(call java-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
+full_java_lib_deps := $(call java-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE)) \
+    $(full_shared_java_libs)
 else
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH :=
 
@@ -697,6 +698,86 @@
 endif
 
 ###########################################################
+# JACK
+###########################################################
+ifdef LOCAL_JACK_ENABLED
+ifdef need_compile_java
+
+full_static_jack_libs := \
+    $(foreach lib,$(LOCAL_STATIC_JAVA_LIBRARIES), \
+      $(call intermediates-dir-for, \
+        JAVA_LIBRARIES,$(lib),$(LOCAL_IS_HOST_MODULE),COMMON)/classes.jack)
+
+ifeq ($(my_prefix),TARGET_)
+ifeq ($(LOCAL_SDK_VERSION),)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES := $(call jack-lib-files,core-libart)
+else
+ifeq ($(LOCAL_SDK_VERSION)$(TARGET_BUILD_APPS),current)
+# LOCAL_SDK_VERSION is current and no TARGET_BUILD_APPS.
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES := $(call jack-lib-files,android_stubs_current)
+else ifeq ($(LOCAL_SDK_VERSION)$(TARGET_BUILD_APPS),system_current)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES := $(call jack-lib-files,android_system_stubs_current)
+else
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES := $(call jack-lib-files,sdk_v$(LOCAL_SDK_VERSION))
+endif # current or system_current
+endif # LOCAL_SDK_VERSION
+endif # TARGET_
+
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_STATIC_JACK_LIBRARIES := $(full_static_jack_libs)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_VM_ARGS := $(LOCAL_JACK_VM_ARGS)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_EXTRA_ARGS := $(LOCAL_JACK_EXTRA_ARGS)
+
+ifdef LOCAL_IS_HOST_MODULE
+ifeq ($(USE_CORE_LIB_BOOTCLASSPATH),true)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES := $(call jack-lib-files,core-libart-hostdex,$(LOCAL_IS_HOST_MODULE))
+full_shared_jack_libs := $(call jack-lib-files,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
+full_jack_lib_deps := $(call jack-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
+else
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES :=
+full_shared_jack_libs := $(call jack-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
+full_jack_lib_deps := $(full_shared_jack_libs)
+endif # USE_CORE_LIB_BOOTCLASSPATH
+else # !LOCAL_IS_HOST_MODULE
+full_shared_jack_libs := $(call jack-lib-files,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
+full_jack_lib_deps := $(call jack-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
+endif # !LOCAL_IS_HOST_MODULE
+full_jack_libs := $(full_shared_jack_libs) $(full_static_jack_libs) $(LOCAL_JACK_CLASSPATH)
+full_jack_lib_deps += $(full_static_jack_libs) $(LOCAL_JACK_CLASSPATH)
+
+# This is set by packages that are linking to other packages that export
+# shared libraries, allowing them to make use of the code in the linked apk.
+ifneq ($(apk_libraries),)
+  link_apk_jack_libraries := \
+      $(foreach lib,$(apk_libraries), \
+        $(call intermediates-dir-for, \
+              APPS,$(lib),,COMMON)/classes.jack)
+
+  # link against the jar with full original names (before proguard processing).
+  full_shared_jack_libs += $(link_apk_jack_libraries)
+  full_jack_libs += $(link_apk_jack_libraries)
+  full_jack_lib_deps += $(link_apk_jack_libraries)
+endif
+
+# This is set by packages that contain instrumentation, allowing them to
+# link against the package they are instrumenting.  Currently only one such
+# package is allowed.
+ifdef LOCAL_INSTRUMENTATION_FOR
+
+   # link against the jar with full original names (before proguard processing).
+   link_instr_classes_jack := $(link_instr_intermediates_dir.COMMON)/classes.noshrob.jack
+   full_jack_libs += $(link_instr_classes_jack)
+   full_jack_lib_deps += $(link_instr_classes_jack)
+endif
+
+endif  # need_compile_java
+
+# Propagate local configuration options to this target.
+$(LOCAL_INTERMEDIATE_TARGETS) : PRIVATE_ALL_JACK_LIBRARIES:= $(full_jack_libs)
+$(LOCAL_INTERMEDIATE_TARGETS) : PRIVATE_JARJAR_RULES := $(LOCAL_JARJAR_RULES)
+
+endif # LOCAL_JACK_ENABLED
+
+###########################################################
 ## NOTICE files
 ###########################################################
 
diff --git a/core/binary.mk b/core/binary.mk
index d3d050e..b8003d7 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -44,11 +44,14 @@
 my_ldlibs := $(LOCAL_LDLIBS)
 my_asflags := $(LOCAL_ASFLAGS)
 my_cc := $(LOCAL_CC)
+my_cc_wrapper := $(CC_WRAPPER)
 my_cxx := $(LOCAL_CXX)
+my_cxx_wrapper := $(CXX_WRAPPER)
 my_c_includes := $(LOCAL_C_INCLUDES)
 my_generated_sources := $(LOCAL_GENERATED_SOURCES)
 my_native_coverage := $(LOCAL_NATIVE_COVERAGE)
 my_additional_dependencies := $(LOCAL_MODULE_MAKEFILE) $(LOCAL_ADDITIONAL_DEPENDENCIES)
+my_export_c_include_dirs := $(LOCAL_EXPORT_C_INCLUDE_DIRS)
 
 ifdef LOCAL_IS_HOST_MODULE
 my_allow_undefined_symbols := true
@@ -225,6 +228,9 @@
     my_cflags += $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_FDO_OPTIMIZE_CFLAGS)
     my_fdo_build := true
   endif
+  # Disable ccache (or other compiler wrapper).
+  my_cc_wrapper :=
+  my_cxx_wrapper :=
 endif
 
 ###########################################################
@@ -335,6 +341,7 @@
   else
     my_cc := $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)CC)
   endif
+  my_cc := $(my_cc_wrapper) $(my_cc)
 endif
 ifneq ($(LOCAL_NO_STATIC_ANALYZER),true)
   my_cc := $(SYNTAX_TOOLS_PREFIX)/ccc-analyzer $(my_syntax_arch) "$(my_cc)"
@@ -351,6 +358,7 @@
   else
     my_cxx := $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)CXX)
   endif
+  my_cxx := $(my_cxx_wrapper) $(my_cxx)
 endif
 ifneq ($(LOCAL_NO_STATIC_ANALYZER),true)
   my_cxx := $(SYNTAX_TOOLS_PREFIX)/cxx-analyzer $(my_syntax_arch) "$(my_cxx)"
@@ -387,7 +395,7 @@
 ## Define arm-vs-thumb-mode flags.
 ###########################################################
 LOCAL_ARM_MODE := $(strip $(LOCAL_ARM_MODE))
-ifeq ($(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH),arm)
+ifeq ($($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH),arm)
 arm_objects_mode := $(if $(LOCAL_ARM_MODE),$(LOCAL_ARM_MODE),arm)
 normal_objects_mode := $(if $(LOCAL_ARM_MODE),$(LOCAL_ARM_MODE),thumb)
 
@@ -477,6 +485,7 @@
 # This is just a dummy rule to make sure gmake doesn't skip updating the dependents.
 $(rs_generated_cpps) : $(RenderScript_file_stamp)
 	@echo "Updated RS generated cpp file $@."
+	$(hide) touch $@
 
 my_c_includes += $(renderscript_intermediate)
 my_generated_sources += $(rs_generated_cpps)
@@ -500,48 +509,69 @@
 ALL_GENERATED_SOURCES += $(my_generated_sources)
 
 ###########################################################
-## Compile the .proto files to .cc and then to .o
+## Compile the .proto files to .cc (or .c) and then to .o
 ###########################################################
 proto_sources := $(filter %.proto,$(my_src_files))
 proto_generated_objects :=
 proto_generated_headers :=
 ifneq ($(proto_sources),)
-proto_sources_fullpath := $(addprefix $(LOCAL_PATH)/, $(proto_sources))
-proto_generated_cc_sources_dir := $(generated_sources_dir)/proto
-proto_generated_cc_sources := $(addprefix $(proto_generated_cc_sources_dir)/, \
-    $(patsubst %.proto,%.pb.cc,$(proto_sources_fullpath)))
-proto_generated_headers := $(patsubst %.pb.cc,%.pb.h, $(proto_generated_cc_sources))
+proto_generated_sources_dir := $(generated_sources_dir)/proto
 proto_generated_obj_dir := $(intermediates)/proto
+
+ifneq (,$(filter nanopb-c nanopb-c-enable_malloc, $(LOCAL_PROTOC_OPTIMIZE_TYPE)))
+my_proto_source_suffix := .c
+my_proto_c_includes := external/nanopb-c
+my_protoc_flags := --nanopb_out=$(proto_generated_sources_dir) \
+    --plugin=external/nanopb-c/generator/protoc-gen-nanopb
+else
+my_proto_source_suffix := .cc
+my_proto_c_includes := external/protobuf/src
+my_cflags += -DGOOGLE_PROTOBUF_NO_RTTI
+my_protoc_flags := --cpp_out=$(proto_generated_sources_dir)
+endif
+my_proto_c_includes += $(proto_generated_sources_dir)
+
+proto_sources_fullpath := $(addprefix $(LOCAL_PATH)/, $(proto_sources))
+proto_generated_sources := $(addprefix $(proto_generated_sources_dir)/, \
+    $(patsubst %.proto,%.pb$(my_proto_source_suffix),$(proto_sources_fullpath)))
+proto_generated_headers := $(patsubst %.pb$(my_proto_source_suffix),%.pb.h, $(proto_generated_sources))
 proto_generated_objects := $(addprefix $(proto_generated_obj_dir)/, \
     $(patsubst %.proto,%.pb.o,$(proto_sources_fullpath)))
 
-# Auto-export the generated proto source dir.
-LOCAL_EXPORT_C_INCLUDE_DIRS += $(proto_generated_cc_sources_dir)
-
 # Ensure the transform-proto-to-cc rule is only defined once in multilib build.
 ifndef $(my_prefix)_$(LOCAL_MODULE_CLASS)_$(LOCAL_MODULE)_proto_defined
-$(proto_generated_cc_sources): PRIVATE_PROTO_INCLUDES := $(TOP)
-$(proto_generated_cc_sources): PRIVATE_PROTO_CC_OUTPUT_DIR := $(proto_generated_cc_sources_dir)
-$(proto_generated_cc_sources): PRIVATE_PROTOC_FLAGS := $(LOCAL_PROTOC_FLAGS)
-$(proto_generated_cc_sources): $(proto_generated_cc_sources_dir)/%.pb.cc: %.proto $(PROTOC)
+$(proto_generated_sources): PRIVATE_PROTO_INCLUDES := $(TOP)
+$(proto_generated_sources): PRIVATE_PROTOC_FLAGS := $(LOCAL_PROTOC_FLAGS) $(my_protoc_flags)
+$(proto_generated_sources): $(proto_generated_sources_dir)/%.pb$(my_proto_source_suffix): %.proto $(PROTOC)
 	$(transform-proto-to-cc)
 
 # This is just a dummy rule to make sure gmake doesn't skip updating the dependents.
-$(proto_generated_headers): $(proto_generated_cc_sources_dir)/%.pb.h: $(proto_generated_cc_sources_dir)/%.pb.cc
+$(proto_generated_headers): $(proto_generated_sources_dir)/%.pb.h: $(proto_generated_sources_dir)/%.pb$(my_proto_source_suffix)
 	@echo "Updated header file $@."
+	$(hide) touch $@
 
 $(my_prefix)_$(LOCAL_MODULE_CLASS)_$(LOCAL_MODULE)_proto_defined := true
 endif  # transform-proto-to-cc rule included only once
 
 $(proto_generated_objects): PRIVATE_ARM_MODE := $(normal_objects_mode)
 $(proto_generated_objects): PRIVATE_ARM_CFLAGS := $(normal_objects_cflags)
-$(proto_generated_objects): $(proto_generated_obj_dir)/%.o: $(proto_generated_cc_sources_dir)/%.cc $(proto_generated_headers)
+$(proto_generated_objects): $(proto_generated_obj_dir)/%.o: $(proto_generated_sources_dir)/%$(my_proto_source_suffix) $(proto_generated_headers)
+ifeq ($(my_proto_source_suffix),.c)
+	$(transform-$(PRIVATE_HOST)c-to-o)
+else
 	$(transform-$(PRIVATE_HOST)cpp-to-o)
+endif
 -include $(proto_generated_objects:%.o=%.P)
 
-my_c_includes += external/protobuf/src $(proto_generated_cc_sources_dir)
-my_cflags += -DGOOGLE_PROTOBUF_NO_RTTI
-ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),full)
+my_c_includes += $(my_proto_c_includes)
+# Auto-export the generated proto source dir.
+my_export_c_include_dirs += $(my_proto_c_includes)
+
+ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),nanopb-c-enable_malloc)
+    my_static_libraries += libprotobuf-c-nano-enable_malloc
+else ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),nanopb-c)
+    my_static_libraries += libprotobuf-c-nano
+else ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),full)
     ifdef LOCAL_SDK_VERSION
         my_static_libraries += libprotobuf-cpp-full
     else
@@ -556,7 +586,6 @@
 endif
 endif  # $(proto_sources) non-empty
 
-
 ###########################################################
 ## YACC: Compile .y and .yy files to .cpp and the to .o.
 ###########################################################
@@ -1088,12 +1117,12 @@
 # Export includes
 ###########################################################
 export_includes := $(intermediates)/export_includes
-$(export_includes): PRIVATE_EXPORT_C_INCLUDE_DIRS := $(LOCAL_EXPORT_C_INCLUDE_DIRS)
+$(export_includes): PRIVATE_EXPORT_C_INCLUDE_DIRS := $(my_export_c_include_dirs)
 # Make sure .pb.h are already generated before any dependent source files get compiled.
 $(export_includes) : $(LOCAL_MODULE_MAKEFILE) $(proto_generated_headers)
 	@echo Export includes file: $< -- $@
 	$(hide) mkdir -p $(dir $@) && rm -f $@
-ifdef LOCAL_EXPORT_C_INCLUDE_DIRS
+ifdef my_export_c_include_dirs
 	$(hide) for d in $(PRIVATE_EXPORT_C_INCLUDE_DIRS); do \
 	        echo "-I $$d" >> $@; \
 	        done
diff --git a/core/build_id.mk b/core/build_id.mk
index f94b224..0e8e2cf 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -18,6 +18,4 @@
 # (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
 
-BUILD_ID := AOSP
-
-DISPLAY_BUILD_NUMBER := true
+export BUILD_ID=MASTER
diff --git a/core/ccache.mk b/core/ccache.mk
new file mode 100644
index 0000000..34e5e1c
--- /dev/null
+++ b/core/ccache.mk
@@ -0,0 +1,57 @@
+#
+# Copyright (C) 2015 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+ifneq ($(USE_CCACHE),)
+  # The default check uses size and modification time, causing false misses
+  # since the mtime depends when the repo was checked out
+  export CCACHE_COMPILERCHECK := content
+
+  # See man page, optimizations to get more cache hits
+  # implies that __DATE__ and __TIME__ are not critical for functionality.
+  # Ignore include file modification time since it will depend on when
+  # the repo was checked out
+  export CCACHE_SLOPPINESS := time_macros,include_file_mtime,file_macro
+
+  # Turn all preprocessor absolute paths into relative paths.
+  # Fixes absolute paths in preprocessed source due to use of -g.
+  # We don't really use system headers much so the rootdir is
+  # fine; ensures these paths are relative for all Android trees
+  # on a workstation.
+  export CCACHE_BASEDIR := /
+
+  # Workaround for ccache with clang.
+  # See http://petereisentraut.blogspot.com/2011/09/ccache-and-clang-part-2.html
+  export CCACHE_CPP2 := true
+
+  CCACHE_HOST_TAG := $(HOST_PREBUILT_TAG)
+  # If we are cross-compiling Windows binaries on Linux
+  # then use the linux ccache binary instead.
+  ifeq ($(HOST_OS)-$(BUILD_OS),windows-linux)
+    CCACHE_HOST_TAG := linux-$(HOST_PREBUILT_ARCH)
+  endif
+  ccache := prebuilts/misc/$(CCACHE_HOST_TAG)/ccache/ccache
+  # Check that the executable is here.
+  ccache := $(strip $(wildcard $(ccache)))
+  ifdef ccache
+    ifndef CC_WRAPPER
+      CC_WRAPPER := $(ccache)
+    endif
+    ifndef CXX_WRAPPER
+      CXX_WRAPPER := $(ccache)
+    endif
+    ccache =
+  endif
+endif
diff --git a/core/clang/TARGET_arm.mk b/core/clang/TARGET_arm.mk
index 6f6d624..62ce242 100644
--- a/core/clang/TARGET_arm.mk
+++ b/core/clang/TARGET_arm.mk
@@ -66,3 +66,7 @@
 $(clang_2nd_arch_prefix)RS_COMPAT_TRIPLE := armv7-none-linux-gnueabi
 
 $(clang_2nd_arch_prefix)TARGET_LIBPROFILE_RT := $(LLVM_RTLIB_PATH)/libclang_rt.profile-arm-android.a
+
+# Address sanitizer clang config
+$(clang_2nd_arch_prefix)ADDRESS_SANITIZER_RUNTIME_LIBRARY := libclang_rt.asan-arm-android
+$(clang_2nd_arch_prefix)ADDRESS_SANITIZER_RPATH := /system/lib/asan
diff --git a/core/clang/TARGET_arm64.mk b/core/clang/TARGET_arm64.mk
index b67d458..ea4d937 100644
--- a/core/clang/TARGET_arm64.mk
+++ b/core/clang/TARGET_arm64.mk
@@ -64,3 +64,7 @@
 RS_COMPAT_TRIPLE := aarch64-linux-android
 
 TARGET_LIBPROFILE_RT := $(LLVM_RTLIB_PATH)/libclang_rt.profile-aarch64-android.a
+
+# Address sanitizer clang config
+ADDRESS_SANITIZER_RUNTIME_LIBRARY := libclang_rt.asan-arm64-android
+ADDRESS_SANITIZER_RPATH := /system/lib64/asan
diff --git a/core/clang/config.mk b/core/clang/config.mk
index 24c06b6..e1bfb01 100644
--- a/core/clang/config.mk
+++ b/core/clang/config.mk
@@ -18,18 +18,6 @@
 CLANG_TBLGEN := $(BUILD_OUT_EXECUTABLES)/clang-tblgen$(BUILD_EXECUTABLE_SUFFIX)
 LLVM_TBLGEN := $(BUILD_OUT_EXECUTABLES)/llvm-tblgen$(BUILD_EXECUTABLE_SUFFIX)
 
-# The C/C++ compiler can be wrapped by setting the CC/CXX_WRAPPER vars.
-ifdef CC_WRAPPER
-  ifneq ($(CC_WRAPPER),$(firstword $(CLANG)))
-    CLANG := $(CC_WRAPPER) $(CLANG)
-  endif
-endif
-ifdef CXX_WRAPPER
-  ifneq ($(CXX_WRAPPER),$(firstword $(CLANG_CXX)))
-    CLANG_CXX := $(CXX_WRAPPER) $(CLANG_CXX)
-  endif
-endif
-
 # Clang flags for all host or target rules
 CLANG_CONFIG_EXTRA_ASFLAGS :=
 CLANG_CONFIG_EXTRA_CFLAGS :=
@@ -68,10 +56,15 @@
   -finline-functions \
   -finline-limit=64 \
   -fno-canonical-system-headers \
+  -Wno-clobbered \
+  -fno-devirtualize \
   -fno-tree-sra \
   -fprefetch-loop-arrays \
   -funswitch-loops \
+  -Werror=unused-but-set-parameter \
+  -Werror=unused-but-set-variable \
   -Wmaybe-uninitialized \
+  -Wno-error=clobbered \
   -Wno-error=maybe-uninitialized \
   -Wno-error=unused-but-set-parameter \
   -Wno-error=unused-but-set-variable \
@@ -144,12 +137,10 @@
 include $(BUILD_SYSTEM)/clang/TARGET_$(TARGET_2ND_ARCH).mk
 endif
 
-# Address sanitizer clang config
-ADDRESS_SANITIZER_RUNTIME_LIBRARY := libclang_rt.asan_$(TARGET_ARCH)_android
 ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS := -fno-omit-frame-pointer
 ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS := -Wl,-u,__asan_preinit
 
-ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES := libdl $(ADDRESS_SANITIZER_RUNTIME_LIBRARY)
+ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES := libdl
 ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES := libasan
 
 # This allows us to use the superset of functionality that compiler-rt
diff --git a/core/cleanbuild.mk b/core/cleanbuild.mk
index cf980d8..801a292 100644
--- a/core/cleanbuild.mk
+++ b/core/cleanbuild.mk
@@ -247,3 +247,63 @@
   $(info *** Done with the cleaning, now starting the real build.)
 endif
 force_installclean :=
+
+###########################################################
+# Clean build tools when swithcing between prebuilt host tools (such as in
+# apps_only build) and tools built from source (platform build).
+previous_prebuilt_tools_config_file := $(HOST_OUT)/previous_prebuilt_tools_config.mk
+ifneq (,$(TARGET_BUILD_APPS)$(filter true,$(TARGET_BUILD_PDK)))
+current_prebuilt_tools := true
+else
+current_prebuilt_tools := false
+endif
+PREVIOUS_PREBUILT_TOOLS :=
+-include $(previous_prebuilt_tools_config_file)
+force_tools_clean :=
+ifdef PREVIOUS_PREBUILT_TOOLS
+ifneq ($(PREVIOUS_PREBUILT_TOOLS),$(current_prebuilt_tools))
+force_tools_clean := true
+endif
+endif # else, this is the first build, so no need to clean.
+
+# Write the new state to the file.
+$(shell \
+  mkdir -p $(dir $(previous_prebuilt_tools_config_file)) && \
+  echo "PREVIOUS_PREBUILT_TOOLS:=$(current_prebuilt_tools)" > \
+    $(previous_prebuilt_tools_config_file))
+
+ifeq ($(force_tools_clean),true)
+# For this list of prebuilt tools, see prebuilts/sdk/tools/Android.mk.
+tools_clean_files := \
+  $(HOST_OUT_COMMON_INTERMEDIATES)/JAVA_LIBRARIES/signapk_intermediates \
+  $(HOST_OUT_COMMON_INTERMEDIATES)/JAVA_LIBRARIES/dx_intermediates \
+  $(HOST_OUT_COMMON_INTERMEDIATES)/JAVA_LIBRARIES/shrinkedAndroid_intermediates \
+  $(HOST_OUT)/obj*/EXECUTABLES/aapt_intermediates \
+  $(HOST_OUT)/obj*/EXECUTABLES/aidl_intermediates \
+  $(HOST_OUT)/obj*/EXECUTABLES/zipalign_intermediates \
+  $(HOST_OUT)/obj*/lib/libc++$(HOST_SHLIB_SUFFIX) \
+
+$(info *** build type changed, clean host tools...)
+$(info *** rm -rf $(tools_clean_files))
+$(shell rm -rf $(tools_clean_files))
+endif
+
+###########################################################
+
+.PHONY: clean-jack-files
+clean-jack-files: clean-dex-files
+	$(hide) find $(OUT_DIR) -name "*.jack" | xargs rm -f
+	$(hide) find $(OUT_DIR) -type d -name "jack" | xargs rm -rf
+	@echo "All jack files have been removed."
+
+.PHONY: clean-dex-files
+clean-dex-files:
+	$(hide) find $(OUT_DIR) -name "*.dex" ! -path "*/jack-incremental/*" | xargs rm -f
+	$(hide) for i in `find $(OUT_DIR) -name "*.jar" -o -name "*.apk"` ; do ((unzip -l $$i 2> /dev/null | \
+				grep -q "\.dex$$" && rm -f $$i) || continue ) ; done
+	@echo "All dex files and archives containing dex files have been removed."
+
+.PHONY: clean-jack-incremental
+clean-jack-incremental:
+	$(hide) find $(OUT_DIR) -name "jack-incremental" -type d | xargs rm -rf
+	@echo "All jack incremental dirs have been removed."
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 4f5ac28..076fb78 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -20,7 +20,6 @@
 LOCAL_MODULE_CLASS:=
 LOCAL_MODULE_SUFFIX:=
 LOCAL_PACKAGE_NAME:=
-LOCAL_PAGE_ALIGN_JNI_SHARED_LIBRARIES:=
 LOCAL_OVERRIDES_PACKAGES:=
 LOCAL_EXPORT_PACKAGE_RESOURCES:=
 LOCAL_MANIFEST_PACKAGE_NAME:=
@@ -74,6 +73,7 @@
 LOCAL_JAVA_LAYERS_FILE:=
 LOCAL_NO_STANDARD_LIBRARIES:=
 LOCAL_CLASSPATH:=
+LOCAL_JACK_CLASSPATH:=
 LOCAL_DROIDDOC_USE_STANDARD_DOCLET:=
 LOCAL_DROIDDOC_SOURCE_PATH:=
 LOCAL_DROIDDOC_TEMPLATE_DIR:=
@@ -107,6 +107,11 @@
 LOCAL_ADDITIONAL_JAVA_DIR:=
 LOCAL_ALLOW_UNDEFINED_SYMBOLS:=
 LOCAL_DX_FLAGS:=
+LOCAL_JACK_ENABLED:=$(DEFAULT_JACK_ENABLED) # '' (ie disabled), disabled, full, incremental
+LOCAL_JACK_VM_ARGS := $(DEFAULT_JACK_VM_ARGS)
+LOCAL_JACK_EXTRA_ARGS := $(DEFAULT_JACK_EXTRA_ARGS)
+LOCAL_JACK_FLAGS:=
+LOCAL_JILL_FLAGS:=
 LOCAL_CERTIFICATE:=
 LOCAL_SDK_VERSION:=
 LOCAL_SDK_RES_VERSION:=
@@ -114,6 +119,7 @@
 LOCAL_EMMA_INSTRUMENT:=
 LOCAL_PROGUARD_ENABLED:= # '',full,custom,nosystem,disabled,obfuscation,optimization
 LOCAL_PROGUARD_FLAGS:=
+LOCAL_JACK_PROGUARD_FLAGS:=
 LOCAL_PROGUARD_FLAG_FILES:=
 LOCAL_TEST_MODULE_TO_PROGUARD_WITH:=
 LOCAL_EMMA_COVERAGE_FILTER:=
@@ -131,10 +137,11 @@
 LOCAL_DEX_PREOPT:= # '',true,false,nostripping
 LOCAL_DEX_PREOPT_IMAGE_LOCATION:=
 LOCAL_DEX_PREOPT_FLAGS:=
-LOCAL_PROTOC_OPTIMIZE_TYPE:= # lite(default),micro,nano,full
+LOCAL_PROTOC_OPTIMIZE_TYPE:= # lite(default),micro,nano,full,nanopb-c,nanopb-c-enable_malloc
 LOCAL_PROTOC_FLAGS:=
 LOCAL_PROTO_JAVA_OUTPUT_PARAMS:=
 LOCAL_NO_CRT:=
+LOCAL_NO_LIBGCC:=
 LOCAL_PROPRIETARY_MODULE:=
 LOCAL_OEM_MODULE:=
 LOCAL_ODM_MODULE:=
diff --git a/core/combo/HOST_darwin-x86.mk b/core/combo/HOST_darwin-x86.mk
index 8389bb8..e77fd21 100644
--- a/core/combo/HOST_darwin-x86.mk
+++ b/core/combo/HOST_darwin-x86.mk
@@ -78,12 +78,14 @@
         -o $@ \
         -install_name @rpath/$(notdir $@) \
         -Wl,-rpath,@loader_path/../$(notdir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_OUT_SHARED_LIBRARIES)) \
+        -Wl,-rpath,@loader_path/$(notdir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_OUT_SHARED_LIBRARIES)) \
         $(PRIVATE_LDFLAGS)
 endef
 
 define transform-host-o-to-executable-inner
 $(hide) $(PRIVATE_CXX) \
         -Wl,-rpath,@loader_path/../$(notdir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_OUT_SHARED_LIBRARIES)) \
+        -Wl,-rpath,@loader_path/$(notdir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_OUT_SHARED_LIBRARIES)) \
         -o $@ \
         -Wl,-headerpad_max_install_names \
         $($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_GLOBAL_LD_DIRS) \
diff --git a/core/combo/TARGET_linux-arm64.mk b/core/combo/TARGET_linux-arm64.mk
index 0819d13..3acddc5 100644
--- a/core/combo/TARGET_linux-arm64.mk
+++ b/core/combo/TARGET_linux-arm64.mk
@@ -114,6 +114,7 @@
 			-Wl,--fatal-warnings \
 			-Wl,-maarch64linux \
 			-Wl,--hash-style=gnu \
+			-Wl,--fix-cortex-a53-843419 \
 			$(arch_variant_ldflags)
 
 # Disable transitive dependency library symbol resolving.
diff --git a/core/combo/TARGET_linux-x86.mk b/core/combo/TARGET_linux-x86.mk
index ed78372..340f306 100644
--- a/core/combo/TARGET_linux-x86.mk
+++ b/core/combo/TARGET_linux-x86.mk
@@ -23,10 +23,10 @@
 endif
 
 # Decouple NDK library selection with platform compiler version
-$(combo_2nd_arch_prefix)TARGET_NDK_GCC_VERSION := 4.8
+$(combo_2nd_arch_prefix)TARGET_NDK_GCC_VERSION := 4.9
 
 ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
-$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := 4.8
+$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := 4.9
 else
 $(combo_2nd_arch_prefix)TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
diff --git a/core/combo/TARGET_linux-x86_64.mk b/core/combo/TARGET_linux-x86_64.mk
index 0b2905c..53b0572 100644
--- a/core/combo/TARGET_linux-x86_64.mk
+++ b/core/combo/TARGET_linux-x86_64.mk
@@ -26,7 +26,7 @@
 TARGET_NDK_GCC_VERSION := 4.9
 
 ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
-TARGET_GCC_VERSION := 4.8
+TARGET_GCC_VERSION := 4.9
 else
 TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
diff --git a/core/combo/arch/arm64/armv8-a.mk b/core/combo/arch/arm64/armv8-a.mk
index edc0497..5e27e5a 100644
--- a/core/combo/arch/arm64/armv8-a.mk
+++ b/core/combo/arch/arm64/armv8-a.mk
@@ -1 +1,5 @@
-arch_variant_cflags :=
+ifneq (,$(filter cortex-a53,$(TARGET_$(combo_2nd_arch_prefix)CPU_VARIANT)))
+	arch_variant_cflags := -mcpu=cortex-a53
+else
+	arch_variant_cflags :=
+endif
diff --git a/core/combo/javac.mk b/core/combo/javac.mk
index fb43ea4..82cbb43 100644
--- a/core/combo/javac.mk
+++ b/core/combo/javac.mk
@@ -9,6 +9,11 @@
 #   COMMON_JAVAC -- Java compiler command with common arguments
 #
 
+ifndef ANDROID_COMPILE_WITH_JACK
+# Defines if compilation with jack is enabled by default.
+ANDROID_COMPILE_WITH_JACK := true
+endif
+
 common_jdk_flags := -source 1.7 -target 1.7 -Xmaxerrs 9999999
 
 # Use the indexer wrapper to index the codebase instead of the javac compiler
diff --git a/core/combo/mac_version.mk b/core/combo/mac_version.mk
index 6defba7..f6bd852 100644
--- a/core/combo/mac_version.mk
+++ b/core/combo/mac_version.mk
@@ -9,7 +9,7 @@
 
 build_mac_version := $(shell sw_vers -productVersion)
 
-mac_sdk_versions_supported :=  10.6 10.7 10.8 10.9
+mac_sdk_versions_supported :=  10.8 10.9 10.10 10.11
 ifneq ($(strip $(MAC_SDK_VERSION)),)
 mac_sdk_version := $(MAC_SDK_VERSION)
 ifeq ($(filter $(mac_sdk_version),$(mac_sdk_versions_supported)),)
@@ -19,7 +19,7 @@
 $(error Stop.)
 endif
 else
-mac_sdk_versions_installed := $(shell xcodebuild -showsdks | grep macosx | sort | sed -e "s/.*macosx//g")
+mac_sdk_versions_installed := $(shell xcodebuild -showsdks | grep macosx | sed -e "s/.*macosx//g")
 mac_sdk_version := $(firstword $(filter $(mac_sdk_versions_installed), $(mac_sdk_versions_supported)))
 ifeq ($(mac_sdk_version),)
 mac_sdk_version := $(firstword $(mac_sdk_versions_supported))
diff --git a/core/combo/select.mk b/core/combo/select.mk
index 01f9322..df12e7e 100644
--- a/core/combo/select.mk
+++ b/core/combo/select.mk
@@ -47,62 +47,3 @@
 
 # Now include the combo for this specific target.
 include $(BUILD_COMBOS)/$(combo_target)$(combo_os_arch).mk
-
-ifneq ($(USE_CCACHE),)
-  # The default check uses size and modification time, causing false misses
-  # since the mtime depends when the repo was checked out
-  export CCACHE_COMPILERCHECK := content
-
-  # See man page, optimizations to get more cache hits
-  # implies that __DATE__ and __TIME__ are not critical for functionality.
-  # Ignore include file modification time since it will depend on when
-  # the repo was checked out
-  export CCACHE_SLOPPINESS := time_macros,include_file_mtime,file_macro
-
-  # Turn all preprocessor absolute paths into relative paths.
-  # Fixes absolute paths in preprocessed source due to use of -g.
-  # We don't really use system headers much so the rootdir is
-  # fine; ensures these paths are relative for all Android trees
-  # on a workstation.
-  export CCACHE_BASEDIR := /
-
-  # Workaround for ccache with clang.
-  # See http://petereisentraut.blogspot.com/2011/09/ccache-and-clang-part-2.html
-  export CCACHE_CPP2 := true
-
-  CCACHE_HOST_TAG := $(HOST_PREBUILT_TAG)
-  # If we are cross-compiling Windows binaries on Linux
-  # then use the linux ccache binary instead.
-  ifeq ($(HOST_OS)-$(BUILD_OS),windows-linux)
-    CCACHE_HOST_TAG := linux-$(HOST_PREBUILT_ARCH)
-  endif
-  ccache := prebuilts/misc/$(CCACHE_HOST_TAG)/ccache/ccache
-  # Check that the executable is here.
-  ccache := $(strip $(wildcard $(ccache)))
-  ifdef ccache
-    ifndef CC_WRAPPER
-      CC_WRAPPER := $(ccache)
-    endif
-    ifndef CXX_WRAPPER
-      CXX_WRAPPER := $(ccache)
-    endif
-    ccache =
-  endif
-endif
-
-# Stash the original values of CC and CXX so we can still use the non-wrapped
-# values later.
-$(combo_2nd_arch_prefix)CC_BARE := $($(combo_var_prefix)CC)
-$(combo_2nd_arch_prefix)CXX_BARE := $($(combo_var_prefix)CXX)
-
-# The C/C++ compiler can be wrapped by setting the CC/CXX_WRAPPER vars.
-ifdef CC_WRAPPER
-  ifneq ($(CC_WRAPPER),$(firstword $($(combo_var_prefix)CC)))
-    $(combo_var_prefix)CC := $(CC_WRAPPER) $($(combo_var_prefix)CC)
-  endif
-endif
-ifdef CXX_WRAPPER
-  ifneq ($(CXX_WRAPPER),$(firstword $($(combo_var_prefix)CXX)))
-    $(combo_var_prefix)CXX := $(CXX_WRAPPER) $($(combo_var_prefix)CXX)
-  endif
-endif
diff --git a/core/config.mk b/core/config.mk
index aa7e318..51810aa 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -38,6 +38,7 @@
 # TODO: See if we can remove most of these from the global list.
 SRC_HEADERS := \
 	$(TOPDIR)system/core/include \
+	$(TOPDIR)system/media/audio/include \
 	$(TOPDIR)hardware/libhardware/include \
 	$(TOPDIR)hardware/libhardware_legacy/include \
 	$(TOPDIR)hardware/ril/include \
@@ -131,6 +132,12 @@
 # list of flags to turn specific warnings in to errors
 TARGET_ERROR_FLAGS := -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point
 
+ifdef TMPDIR
+JAVA_TMPDIR_ARG := -Djava.io.tmpdir=$(TMPDIR)
+else
+JAVA_TMPDIR_ARG :=
+endif
+
 # ###############################################################
 # Include sub-configuration files
 # ###############################################################
@@ -250,6 +257,8 @@
 include $(BUILD_SYSTEM)/combo/select.mk
 endif
 
+include $(BUILD_SYSTEM)/ccache.mk
+
 ifdef TARGET_PREFER_32_BIT
 TARGET_PREFER_32_BIT_APPS := true
 TARGET_PREFER_32_BIT_EXECUTABLES := true
@@ -369,6 +378,11 @@
 
 # ---------------------------------------------------------------
 # Generic tools.
+JACK := $(HOST_OUT_EXECUTABLES)/jack
+JACK_JAR := $(HOST_OUT_JAVA_LIBRARIES)/jack.jar
+JACK_LAUNCHER_JAR := $(HOST_OUT_JAVA_LIBRARIES)/jack-launcher.jar
+JILL_JAR := $(HOST_OUT_JAVA_LIBRARIES)/jill.jar
+JACK_MULTIDEX_DEFAULT_PREPROCESSOR := frameworks/multidex/library/resources/JACK-INF/legacyMultidexInstallation.jpp
 
 LEX := prebuilts/misc/$(BUILD_OS)-$(HOST_PREBUILT_ARCH)/flex/flex-2.5.39
 # The default PKGDATADIR built in the prebuilt bison is a relative path
@@ -413,6 +427,42 @@
 TUNE2FS := $(HOST_OUT_EXECUTABLES)/tune2fs$(HOST_EXECUTABLE_SUFFIX)
 E2FSCK := $(HOST_OUT_EXECUTABLES)/e2fsck$(HOST_EXECUTABLE_SUFFIX)
 JARJAR := $(HOST_OUT_JAVA_LIBRARIES)/jarjar.jar
+
+ifeq ($(ANDROID_COMPILE_WITH_JACK),true)
+DEFAULT_JACK_ENABLED:=full
+else
+DEFAULT_JACK_ENABLED:=
+endif
+ifneq ($(strip $(ANDROID_JACK_VM)),)
+JACK_VM := $(ANDROID_JACK_VM)
+else
+JACK_VM := java
+endif
+# call jack
+#
+# $(1): vm arguments
+# $(2): jack perf arguments
+ifneq (,$(strip $(filter dist,$(MAKECMDGOALS))))
+JACK_SERVER_LOG_COMMAND := mkdir -p $(DIST_DIR)/logs/; SERVER_LOG=$(DIST_DIR)/logs/jack-server.log
+endif
+define call-jack
+$(JACK_SERVER_LOG_COMMAND) JACK_VM_COMMAND="$(JACK_VM) $(1) $(JAVA_TMPDIR_ARG) -jar $(JACK_LAUNCHER_JAR) " JACK_JAR="$(JACK_JAR)" $(JACK) $(2)
+endef
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_VM_ARGS := $(DEFAULT_JACK_VM_ARGS)
+ifneq ($(ANDROID_JACK_VM_ARGS),)
+DEFAULT_JACK_VM_ARGS := $(ANDROID_JACK_VM_ARGS)
+else
+DEFAULT_JACK_VM_ARGS := -Dfile.encoding=UTF-8 -Xms2560m -XX:+TieredCompilation
+endif
+ifneq ($(ANDROID_JACK_EXTRA_ARGS),)
+DEFAULT_JACK_EXTRA_ARGS := $(ANDROID_JACK_EXTRA_ARGS)
+else
+DEFAULT_JACK_EXTRA_ARGS := @$(BUILD_SYSTEM)/jack-default.args
+endif
+# Turn off jack warnings by default.
+DEFAULT_JACK_EXTRA_ARGS += --verbose error
+
+JILL := java -Xmx3500m -jar $(JILL_JAR)
 PROGUARD := external/proguard/bin/proguard.sh
 JAVATAGS := build/tools/java-event-log-tags.py
 LLVM_RS_CC := $(HOST_OUT_EXECUTABLES)/llvm-rs-cc$(HOST_EXECUTABLE_SUFFIX)
@@ -423,6 +473,8 @@
 VERITY_SIGNER := $(HOST_OUT_EXECUTABLES)/verity_signer
 BUILD_VERITY_TREE := $(HOST_OUT_EXECUTABLES)/build_verity_tree
 BOOT_SIGNER := $(HOST_OUT_EXECUTABLES)/boot_signer
+FUTILITY := prebuilts/misc/$(BUILD_OS)-$(HOST_PREBUILT_ARCH)/futility/futility
+VBOOT_SIGNER := prebuilts/misc/scripts/vboot_signer/vboot_signer.sh
 
 # ACP is always for the build OS, not for the host OS
 ACP := $(BUILD_OUT_EXECUTABLES)/acp$(BUILD_EXECUTABLE_SUFFIX)
@@ -578,6 +630,13 @@
 HISTORICAL_SDK_VERSIONS_ROOT := $(TOPDIR)prebuilts/sdk
 HISTORICAL_NDK_VERSIONS_ROOT := $(TOPDIR)prebuilts/ndk
 
+# The path where app can reference the support library resources.
+ifdef TARGET_BUILD_APPS
+SUPPORT_LIBRARY_ROOT := $(HISTORICAL_SDK_VERSIONS_ROOT)/current/support
+else
+SUPPORT_LIBRARY_ROOT := frameworks/support
+endif
+
 # Historical SDK version N is stored in $(HISTORICAL_SDK_VERSIONS_ROOT)/N.
 # The 'current' version is whatever this source tree is.
 #
@@ -616,8 +675,12 @@
 # Set up RS prebuilt variables for compatibility library
 
 RS_PREBUILT_CLCORE := prebuilts/sdk/renderscript/lib/$(TARGET_ARCH)/librsrt_$(TARGET_ARCH).bc
-RS_PREBUILT_LIBPATH := -L prebuilts/ndk/8/platforms/android-9/arch-$(TARGET_ARCH)/usr/lib
 RS_PREBUILT_COMPILER_RT := prebuilts/sdk/renderscript/lib/$(TARGET_ARCH)/libcompiler_rt.a
+ifeq (true,$(TARGET_IS_64_BIT))
+RS_PREBUILT_LIBPATH := -L prebuilts/ndk/9/platforms/android-21/arch-$(TARGET_ARCH)/usr/lib
+else
+RS_PREBUILT_LIBPATH := -L prebuilts/ndk/8/platforms/android-9/arch-$(TARGET_ARCH)/usr/lib
+endif
 
 # API Level lists for Renderscript Compat lib.
 RSCOMPAT_32BIT_ONLY_API_LEVELS := 8 9 10 11 12 13 14 15 16 17 18 19 20
diff --git a/core/config_sanitizers.mk b/core/config_sanitizers.mk
index 210d442..7eb1c89 100644
--- a/core/config_sanitizers.mk
+++ b/core/config_sanitizers.mk
@@ -78,10 +78,15 @@
   ifdef LOCAL_IS_HOST_MODULE
     # -nodefaultlibs (provided with libc++) prevents the driver from linking
     # libraries needed with -fsanitize=address. http://b/18650275 (WAI)
-    my_ldlibs += -ldl -lpthread
+    my_ldlibs += -lm -ldl -lpthread
+    my_ldflags += -Wl,--no-as-needed
   else
-    my_shared_libraries += $(ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES)
+    # ASan runtime library must be the first in the link order.
+    my_shared_libraries := $($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_RUNTIME_LIBRARY) \
+                           $(my_shared_libraries) \
+                           $(ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES)
     my_static_libraries += $(ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES)
+    my_ldflags += -Wl,-rpath,$($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_RPATH)
   endif
 endif
 
diff --git a/core/configure_local_jack.mk b/core/configure_local_jack.mk
new file mode 100644
index 0000000..98b13d2
--- /dev/null
+++ b/core/configure_local_jack.mk
@@ -0,0 +1,30 @@
+#
+# Copyright (C) 2008 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+ifdef ANDROID_FORCE_JACK_ENABLED
+LOCAL_JACK_ENABLED := $(ANDROID_FORCE_JACK_ENABLED)
+endif
+LOCAL_JACK_ENABLED := $(strip $(LOCAL_JACK_ENABLED))
+ifneq ($(LOCAL_JACK_ENABLED),full)
+ifneq ($(LOCAL_JACK_ENABLED),incremental)
+ifdef LOCAL_JACK_ENABLED
+ifneq ($(LOCAL_JACK_ENABLED),disabled)
+$(error $(LOCAL_PATH): invalid LOCAL_JACK_ENABLED "$(LOCAL_JACK_ENABLED)" for $(LOCAL_MODULE))
+endif
+endif
+LOCAL_JACK_ENABLED :=
+endif
+endif
diff --git a/core/cxx_stl_setup.mk b/core/cxx_stl_setup.mk
index da84bdd..3450b2c 100644
--- a/core/cxx_stl_setup.mk
+++ b/core/cxx_stl_setup.mk
@@ -68,6 +68,7 @@
     else
         ifeq (arm,$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH))
             my_static_libraries += libunwind_llvm
+            my_ldflags += -Wl,--exclude-libs,libunwind_llvm.a
         endif
 
         ifeq ($(my_link_type),static)
@@ -76,18 +77,8 @@
             my_shared_libraries += libdl
         endif
     endif
-else ifneq ($(filter $(my_cxx_stl),stlport stlport_static),)
-    ifndef LOCAL_IS_HOST_MODULE
-        my_c_includes += external/stlport/stlport bionic/libstdc++/include \
-                         bionic
-        ifeq ($(my_cxx_stl),stlport)
-            my_shared_libraries += libstdc++ libstlport
-        else
-            my_static_libraries += libstdc++ libstlport_static
-        endif
-    endif
 else ifeq ($(my_cxx_stl),ndk)
-    # Using an NDK STL. Handled farther up in this file.
+    # Using an NDK STL. Handled in binary.mk.
     ifndef LOCAL_IS_HOST_MODULE
         my_system_shared_libraries += libstdc++
     endif
@@ -106,5 +97,5 @@
         my_ldlibs += $($(my_prefix)$(HOST_OS)_$(my_link_type)_gcclibs)
     endif
 else
-    $(error $(my_cxx_stl) is not a supported STL.)
+    $(error $(LOCAL_PATH): $(LOCAL_MODULE): $(my_cxx_stl) is not a supported STL.)
 endif
diff --git a/core/definitions.mk b/core/definitions.mk
index d90376e..78b0a39 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -403,6 +403,14 @@
 endef
 
 ###########################################################
+## Reverse order of a list
+###########################################################
+
+define reverse-list
+$(if $(1),$(call reverse-list,$(wordlist 2,$(words $(1)),$(1)))) $(firstword $(1))
+endef
+
+###########################################################
 ## The intermediates directory.  Where object files go for
 ## a given target.  We could technically get away without
 ## the "_intermediates" suffix on the directory, but it's
@@ -602,6 +610,36 @@
 endef
 
 ###########################################################
+## Convert "core ext framework" to "out/.../classes.jack ..."
+## $(1): library list
+## $(2): Non-empty if IS_HOST_MODULE
+###########################################################
+
+# $(1): library name
+# $(2): Non-empty if IS_HOST_MODULE
+define _jack-lib-full-classes
+$(call _java-lib-dir,$(1),$(2))/classes.jack
+endef
+
+# $(1): library name list
+# $(2): Non-empty if IS_HOST_MODULE
+define jack-lib-files
+$(foreach lib,$(1),$(call _jack-lib-full-classes,$(lib),$(2)))
+endef
+
+# $(1): library name
+# $(2): Non-empty if IS_HOST_MODULE
+define _jack-lib-full-dep
+$(call _jack-lib-full-classes,$(1),$(2))
+endef
+
+# $(1): library name list
+# $(2): Non-empty if IS_HOST_MODULE
+define jack-lib-deps
+$(foreach lib,$(1),$(call _jack-lib-full-dep,$(lib),$(2)))
+endef
+
+###########################################################
 ## Run rot13 on a string
 ## $(1): the string.  Must be one line.
 ###########################################################
@@ -957,7 +995,7 @@
 endef
 
 ######################################################################
-## Commands for running protoc to compile .proto into .pb.cc and .pb.h
+## Commands for running protoc to compile .proto into .pb.cc (or.pb.c) and .pb.h
 ######################################################################
 define transform-proto-to-cc
 @mkdir -p $(dir $@)
@@ -965,10 +1003,9 @@
 $(hide) $(PROTOC) \
 	$(addprefix --proto_path=, $(PRIVATE_PROTO_INCLUDES)) \
 	$(PRIVATE_PROTOC_FLAGS) \
-	--cpp_out=$(PRIVATE_PROTO_CC_OUTPUT_DIR) $<
+	$<
 endef
 
-
 ###########################################################
 ## Commands for running gcc to compile a C++ file
 ###########################################################
@@ -1357,6 +1394,7 @@
 $(hide) $(PRIVATE_CXX) \
 	-Wl,-rpath-link=$($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_OUT_INTERMEDIATE_LIBRARIES) \
 	-Wl,-rpath,\$$ORIGIN/../$(notdir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_OUT_SHARED_LIBRARIES)) \
+	-Wl,-rpath,\$$ORIGIN/$(notdir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_OUT_SHARED_LIBRARIES)) \
 	-shared -Wl,-soname,$(notdir $@) \
 	$($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_GLOBAL_LD_DIRS) \
 	$(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
@@ -1573,6 +1611,7 @@
 	$(call normalize-host-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
 	-Wl,-rpath-link=$($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_OUT_INTERMEDIATE_LIBRARIES) \
 	-Wl,-rpath,\$$ORIGIN/../$(notdir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_OUT_SHARED_LIBRARIES)) \
+	-Wl,-rpath,\$$ORIGIN/$(notdir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_OUT_SHARED_LIBRARIES)) \
 	$($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_GLOBAL_LD_DIRS) \
 	$(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
 		$(PRIVATE_HOST_GLOBAL_LDFLAGS) \
@@ -1625,7 +1664,8 @@
     $(if $(filter --version-code,$(PRIVATE_AAPT_FLAGS)),,$(addprefix --version-code , $(PLATFORM_SDK_VERSION))) \
     $(if $(filter --version-name,$(PRIVATE_AAPT_FLAGS)),,$(addprefix --version-name , $(PLATFORM_VERSION)-$(BUILD_NUMBER))) \
     $(addprefix --rename-manifest-package , $(PRIVATE_MANIFEST_PACKAGE_NAME)) \
-    $(addprefix --rename-instrumentation-target-package , $(PRIVATE_MANIFEST_INSTRUMENTATION_FOR))
+    $(addprefix --rename-instrumentation-target-package , $(PRIVATE_MANIFEST_INSTRUMENTATION_FOR)) \
+    --skip-symbols-without-default-localization
 endef
 
 ifeq ($(HOST_OS),windows)
@@ -1634,12 +1674,6 @@
 xlint_unchecked := -Xlint:unchecked
 endif
 
-ifeq (true, $(ENABLE_INCREMENTALJAVAC))
-incremental_dex := --incremental
-else
-incremental_dex :=
-endif
-
 # emit-line, <word list>, <output file>
 define emit-line
    $(if $(1),echo -n '$(strip $(1)) ' >> $(2))
@@ -1759,68 +1793,146 @@
 $(call compile-java,$(TARGET_JAVAC),$(PRIVATE_BOOTCLASSPATH))
 endef
 
-# Override the above definitions if we want to do incremetal javac
-ifeq (true, $(ENABLE_INCREMENTALJAVAC))
-define compile-java
-$(hide) mkdir -p $(dir $@)
-$(hide) mkdir -p $(PRIVATE_CLASS_INTERMEDIATES_DIR)
-$(hide) touch $(PRIVATE_CLASS_INTERMEDIATES_DIR)/newstamp
-$(call unzip-jar-files,$(PRIVATE_STATIC_JAVA_LIBRARIES),$(PRIVATE_CLASS_INTERMEDIATES_DIR))
-$(hide) if [ -e $(PRIVATE_CLASS_INTERMEDIATES_DIR)/stamp ] ; then \
-        newerFlag=$$(echo -n "-newer $(PRIVATE_CLASS_INTERMEDIATES_DIR)/stamp") ; \
-    fi ; \
-    find $(PRIVATE_JAVA_SOURCES) $$newerFlag > $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list ; \
-    if [ -d "$(PRIVATE_SOURCE_INTERMEDIATES_DIR)" ]; then \
-        find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) -name '*.java' $$newerFlag >> $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list; \
-    fi
-$(hide) tr ' ' '\n' < $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list \
-    | sort -u > $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list-uniq
-@echo "(Incremental) build source files:"
-@cat $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list-uniq
-$(hide) if [ -s $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list-uniq ] ; then \
-    $(1) -encoding UTF-8 \
-    $(strip $(PRIVATE_JAVAC_DEBUG_FLAGS)) \
-    $(if $(findstring true,$(PRIVATE_WARNINGS_ENABLE)),$(xlint_unchecked),) \
-    $(2) \
-    $(addprefix -classpath ,$(strip \
-        $(call normalize-path-list,$(PRIVATE_ALL_JAVA_LIBRARIES) $(PRIVATE_CLASS_INTERMEDIATES_DIR)))) \
-    $(if $(findstring true,$(PRIVATE_WARNINGS_ENABLE)),$(xlint_unchecked),) \
-    -extdirs "" -d $(PRIVATE_CLASS_INTERMEDIATES_DIR) \
-    $(PRIVATE_JAVACFLAGS) \
-    \@$(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list-uniq \
-    || ( exit 41 ) \
-fi
-$(hide) rm -f $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list
-$(hide) rm -f $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list-uniq
+# Invoke Jack to compile java from source to dex and jack files.
+#
+# Some historical notes:
+# - below we write the list of java files to java-source-list to avoid argument
+#   list length problems with Cygwin
+# - we filter out duplicate java file names because Jack doesn't like them.
+define jack-java-to-dex
 $(hide) rm -f $@
-$(if $(PRIVATE_JAR_EXCLUDE_FILES), $(hide) find $(PRIVATE_CLASS_INTERMEDIATES_DIR) \
-    -name $(word 1, $(PRIVATE_JAR_EXCLUDE_FILES)) \
-    $(addprefix -o -name , $(wordlist 2, 999, $(PRIVATE_JAR_EXCLUDE_FILES))) \
-    | xargs rm -rf)
-$(if $(PRIVATE_JAR_PACKAGES), \
-    $(hide) find $(PRIVATE_CLASS_INTERMEDIATES_DIR) -mindepth 1 -type f \
-        $(foreach pkg, $(PRIVATE_JAR_PACKAGES), \
-            -not -path $(PRIVATE_CLASS_INTERMEDIATES_DIR)/$(subst .,/,$(pkg))/\*) -delete ; \
-        find $(PRIVATE_CLASS_INTERMEDIATES_DIR) -empty -delete)
-$(if $(PRIVATE_JAR_EXCLUDE_PACKAGES), $(hide) rm -rf \
-    $(foreach pkg, $(PRIVATE_JAR_EXCLUDE_PACKAGES), \
-        $(PRIVATE_CLASS_INTERMEDIATES_DIR)/$(subst .,/,$(pkg))))
-$(if $(PRIVATE_RMTYPEDEFS), $(hide) $(RMTYPEDEFS) -v $(PRIVATE_CLASS_INTERMEDIATES_DIR))
-$(if $(PRIVATE_JAR_MANIFEST), \
-    $(hide) sed -e 's/%BUILD_NUMBER%/$(BUILD_NUMBER)/' \
-            $(PRIVATE_JAR_MANIFEST) > $(dir $@)/manifest.mf && \
-        jar -cfm $@ $(dir $@)/manifest.mf \
-            -C $(PRIVATE_CLASS_INTERMEDIATES_DIR) ., \
-    $(hide) jar -cf $@ -C $(PRIVATE_CLASS_INTERMEDIATES_DIR) .)
-$(if $(PRIVATE_EXTRA_JAR_ARGS),$(call add-java-resources-to,$@))
-$(hide) mv $(PRIVATE_CLASS_INTERMEDIATES_DIR)/newstamp $(PRIVATE_CLASS_INTERMEDIATES_DIR)/stamp
+$(hide) rm -f $(PRIVATE_CLASSES_JACK)
+$(hide) rm -rf $(PRIVATE_JACK_INTERMEDIATES_DIR)
+$(hide) mkdir -p $(dir $@)
+$(hide) mkdir -p $(dir $(PRIVATE_CLASSES_JACK))
+$(hide) mkdir -p $(PRIVATE_JACK_INTERMEDIATES_DIR)
+$(if $(PRIVATE_JACK_INCREMENTAL_DIR),$(hide) mkdir -p $(PRIVATE_JACK_INCREMENTAL_DIR))
+$(call dump-words-to-file,$(PRIVATE_JAVA_SOURCES),$(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list)
+$(hide) if [ -d "$(PRIVATE_SOURCE_INTERMEDIATES_DIR)" ]; then \
+          find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) -name '*.java' >> $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list; \
+fi
+$(hide) tr ' ' '\n' < $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list \
+    | sort -u > $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq
+$(if $(PRIVATE_JACK_PROGUARD_FLAGS), \
+    $(hide) echo -basedirectory $(CURDIR) > $@.flags; \
+    echo $(PRIVATE_JACK_PROGUARD_FLAGS) >> $@.flags; \
+)
+$(if $(PRIVATE_EXTRA_JAR_ARGS),
+    $(hide) mkdir -p $@.res.tmp
+    $(hide) $(call create-empty-package-at,$@.res.tmp.zip)
+    $(hide) $(call add-java-resources-to,$@.res.tmp.zip)
+    $(hide) $(call unzip-jar-files,$@.res.tmp.zip,$@.res.tmp)
+    $(hide) rm $@.res.tmp.zip)
+$(hide) if [ -s $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq ] ; then \
+    export tmpEcjArg="@$(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq"; \
+else \
+    export tmpEcjArg=""; \
+fi; \
+$(call call-jack,$(PRIVATE_JACK_VM_ARGS),$(PRIVATE_JACK_EXTRA_ARGS)) \
+    $(strip $(PRIVATE_JACK_FLAGS)) \
+    $(strip $(PRIVATE_JACK_DEBUG_FLAGS)) \
+    $(if $(NO_OPTIMIZE_DX), \
+        -D jack.dex.optimize="false") \
+    $(if $(PRIVATE_RMTYPEDEFS), \
+        -D jack.android.remove-typedef="true") \
+    $(addprefix --classpath ,$(strip \
+        $(call normalize-path-list,$(PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES) $(PRIVATE_ALL_JACK_LIBRARIES)))) \
+    $(addprefix --import ,$(call reverse-list,$(PRIVATE_STATIC_JACK_LIBRARIES))) \
+    $(if $(PRIVATE_EXTRA_JAR_ARGS),--import-resource $@.res.tmp) \
+    -D jack.import.resource.policy=keep-first \
+    -D jack.import.type.policy=keep-first \
+    --output-jack $(PRIVATE_CLASSES_JACK) \
+    -D jack.java.source.version=1.7 \
+    $(if $(PRIVATE_JACK_INCREMENTAL_DIR),--incremental-folder $(PRIVATE_JACK_INCREMENTAL_DIR)) \
+    --output-dex $(PRIVATE_JACK_INTERMEDIATES_DIR) \
+    $(addprefix --config-jarjar ,$(strip $(PRIVATE_JARJAR_RULES))) \
+    $(if $(PRIVATE_JACK_PROGUARD_FLAGS),--config-proguard $@.flags) \
+    $$tmpEcjArg \
+    || ( rm -rf $(PRIVATE_CLASSES_JACK); rm -rf $(PRIVATE_JACK_INTERMEDIATES_DIR); exit 41 )
+$(hide) mv $(PRIVATE_JACK_INTERMEDIATES_DIR)/classes*.dex $(dir $@)
+$(hide) rm -f $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list
+$(if $(PRIVATE_EXTRA_JAR_ARGS),$(hide) rm -rf $@.res.tmp)
+$(hide) mv $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq $(PRIVATE_JACK_INTERMEDIATES_DIR).java-source-list
+$(if $(PRIVATE_JAR_PACKAGES), $(hide) echo unsupported options PRIVATE_JAR_PACKAGES in $@; exit 53)
+$(if $(PRIVATE_JAR_EXCLUDE_PACKAGES), $(hide) echo unsupported options JAR_EXCLUDE_PACKAGES in $@; exit 53)
+$(if $(PRIVATE_JAR_MANIFEST), $(hide) echo unsupported options JAR_MANIFEST in $@; exit 53)
 endef
 
-define transform-java-to-classes.jar
-@echo "target Java: $(PRIVATE_MODULE) ($(PRIVATE_CLASS_INTERMEDIATES_DIR))"
-$(call compile-java,$(TARGET_JAVAC),$(PRIVATE_BOOTCLASSPATH))
+define transform-jar-to-jack
+	$(hide) mkdir -p $(dir $@)
+	$(JILL) $(PRIVATE_JILL_FLAGS) --output $@.tmpjill.jack $<
+	$(hide) mkdir -p $@.tmpjill.res
+	$(hide) $(call unzip-jar-files,$<,$@.tmpjill.res)
+	$(hide) find $@.tmpjill.res -iname "*.class" -delete
+	$(hide) $(call call-jack,$(PRIVATE_JACK_VM_ARGS),$(PRIVATE_JACK_EXTRA_ARGS)) \
+        -D jack.import.resource.policy=keep-first \
+        -D jack.import.type.policy=keep-first \
+	    --import $@.tmpjill.jack \
+	    --import-resource $@.tmpjill.res \
+	    --output-jack $@
+	$(hide) rm -rf $@.tmpjill.res
+	$(hide) rm $@.tmpjill.jack
 endef
-endif # ENABLE_INCREMENTALJAVAC
+
+
+# Invoke Jack to compile java from source to jack files without shrink or obfuscation.
+#
+# Some historical notes:
+# - below we write the list of java files to java-source-list to avoid argument
+#   list length problems with Cygwin
+# - we filter out duplicate java file names because Jack doesn't like them.
+define java-to-jack
+$(hide) rm -f $@
+$(hide) rm -rf $(PRIVATE_JACK_INTERMEDIATES_DIR)
+$(hide) mkdir -p $(dir $@)
+$(hide) mkdir -p $(PRIVATE_JACK_INTERMEDIATES_DIR)
+$(if $(PRIVATE_JACK_INCREMENTAL_DIR),$(hide) mkdir -p $(PRIVATE_JACK_INCREMENTAL_DIR))
+$(call dump-words-to-file,$(PRIVATE_JAVA_SOURCES),$(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list)
+$(hide) if [ -d "$(PRIVATE_SOURCE_INTERMEDIATES_DIR)" ]; then \
+          find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) -name '*.java' >> $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list; \
+fi
+$(hide) tr ' ' '\n' < $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list \
+    | sort -u > $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq
+$(if $(PRIVATE_JACK_PROGUARD_FLAGS), \
+    $(hide) echo -basedirectory $(CURDIR) > $@.flags; \
+    echo $(PRIVATE_JACK_PROGUARD_FLAGS) >> $@.flags; \
+)
+$(if $(PRIVATE_EXTRA_JAR_ARGS),
+	$(hide) mkdir -p $@.res.tmp
+	$(hide) $(call create-empty-package-at,$@.res.tmp.zip)
+	$(hide) $(call add-java-resources-to,$@.res.tmp.zip)
+	$(hide) unzip -qo $@.res.tmp.zip -d $@.res.tmp
+	$(hide) rm $@.res.tmp.zip)
+$(hide) if [ -s $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq ] ; then \
+    export tmpEcjArg="@$(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq"; \
+else \
+    export tmpEcjArg=""; \
+fi; \
+$(call call-jack,$(PRIVATE_JACK_VM_ARGS),$(PRIVATE_JACK_EXTRA_ARGS)) \
+    $(strip $(PRIVATE_JACK_FLAGS)) \
+    $(strip $(PRIVATE_JACK_DEBUG_FLAGS)) \
+    $(if $(NO_OPTIMIZE_DX), \
+        -D jack.dex.optimize="false") \
+    $(addprefix --classpath ,$(strip \
+        $(call normalize-path-list,$(PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES) $(PRIVATE_ALL_JACK_LIBRARIES)))) \
+    $(addprefix --import ,$(call reverse-list,$(PRIVATE_STATIC_JACK_LIBRARIES))) \
+    $(if $(PRIVATE_EXTRA_JAR_ARGS),--import-resource $@.res.tmp) \
+    -D jack.import.resource.policy=keep-first \
+    -D jack.import.type.policy=keep-first \
+    -D jack.java.source.version=1.7 \
+    $(if $(PRIVATE_JACK_INCREMENTAL_DIR),--incremental-folder $(PRIVATE_JACK_INCREMENTAL_DIR)) \
+    --output-jack $@ \
+    $(addprefix --config-jarjar ,$(strip $(PRIVATE_JARJAR_RULES))) \
+    $(if $(PRIVATE_JACK_PROGUARD_FLAGS),--config-proguard $@.flags) \
+    $$tmpEcjArg \
+    || ( rm -f $@ ; exit 41 )
+$(hide) rm -f $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list
+$(if $(PRIVATE_EXTRA_JAR_ARGS),$(hide) rm -rf $@.res.tmp)
+$(hide) mv $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list-uniq $(PRIVATE_JACK_INTERMEDIATES_DIR).java-source-list
+$(if $(PRIVATE_JAR_PACKAGES), $(hide) echo unsupported options PRIVATE_JAR_PACKAGES in $@; exit 53)
+$(if $(PRIVATE_JAR_EXCLUDE_PACKAGES), $(hide) echo unsupported options JAR_EXCLUDE_PACKAGES in $@; exit 53)
+$(if $(PRIVATE_JAR_MANIFEST), $(hide) echo unsupported options JAR_MANIFEST in $@; exit 53)
+endef
 
 define transform-classes.jar-to-emma
 $(hide) java -classpath $(EMMA_JAR) emma instr -outmode fullcopy -outfile \
@@ -1838,7 +1950,6 @@
 $(hide) $(DX) \
     $(if $(findstring windows,$(HOST_OS)),,-JXms16M -JXmx2048M) \
     --dex --output=$(dir $@) \
-    $(incremental_dex) \
     $(if $(NO_OPTIMIZE_DX), \
         --no-optimize) \
     $(if $(GENERATE_DEX_DEBUG), \
@@ -1852,12 +1963,20 @@
 # Create a mostly-empty .jar file that we'll add to later.
 # The MacOS jar tool doesn't like creating empty jar files,
 # so we need to give it something.
+# $(1) package to create
+define create-empty-package-at
+@mkdir -p $(dir $(1))
+$(hide) touch $(dir $(1))zipdummy
+$(hide) (cd $(dir $(1)) && jar cf $(notdir $(1)) zipdummy)
+$(hide) zip -qd $(1) zipdummy
+$(hide) rm $(dir $(1))zipdummy
+endef
+
+# Create a mostly-empty .jar file that we'll add to later.
+# The MacOS jar tool doesn't like creating empty jar files,
+# so we need to give it something.
 define create-empty-package
-@mkdir -p $(dir $@)
-$(hide) touch $(dir $@)zipdummy
-$(hide) (cd $(dir $@) && jar cf $(notdir $@) zipdummy)
-$(hide) zip -qd $@ zipdummy
-$(hide) rm $(dir $@)zipdummy
+$(call create-empty-package-at,$@)
 endef
 
 # Copy an arhchive file and delete any class files and empty folders inside.
@@ -1895,6 +2014,7 @@
     $(if $(filter --version-name,$(PRIVATE_AAPT_FLAGS)),,$(addprefix --version-name , $(PLATFORM_VERSION)-$(BUILD_NUMBER))) \
     $(addprefix --rename-manifest-package , $(PRIVATE_MANIFEST_PACKAGE_NAME)) \
     $(addprefix --rename-instrumentation-target-package , $(PRIVATE_MANIFEST_INSTRUMENTATION_FOR)) \
+    --skip-symbols-without-default-localization \
     -F $@
 endef
 
@@ -1906,14 +2026,23 @@
 
 endef
 
+# For apps_only build, don't uncompress/page-align the jni libraries,
+# because the apk may be run on older platforms that don't support loading jni directly from apk.
+ifdef TARGET_BUILD_APPS
+JNI_COMPRESS_FLAGS :=
+ZIPALIGN_PAGE_ALIGN_FLAGS :=
+else
+JNI_COMPRESS_FLAGS := -0
+ZIPALIGN_PAGE_ALIGN_FLAGS := -p
+endif
+
 define add-jni-shared-libs-to-package
 $(hide) rm -rf $(dir $@)lib
 $(hide) mkdir -p $(addprefix $(dir $@)lib/,$(PRIVATE_JNI_SHARED_LIBRARIES_ABI))
 $(foreach abi,$(PRIVATE_JNI_SHARED_LIBRARIES_ABI),\
   $(call _add-jni-shared-libs-to-package-per-abi,$(abi),\
     $(patsubst $(abi):%,%,$(filter $(abi):%,$(PRIVATE_JNI_SHARED_LIBRARIES)))))
-$(hide) (cd $(dir $@) && zip -r \
-    $(if $(filter true, $(PRIVATE_PAGE_ALIGN_JNI_SHARED_LIBRARIES)),-0,) $(notdir $@) lib)
+$(hide) (cd $(dir $@) && zip -r $(JNI_COMPRESS_FLAGS) $(notdir $@) lib)
 $(hide) rm -rf $(dir $@)lib
 endef
 
@@ -1931,6 +2060,19 @@
 @rm -f $(1).jar-arg-list
 endef
 
+# Add resources carried by static Jack libraries.
+#
+define add-carried-jack-resources
+ $(hide) if [ -d $(PRIVATE_JACK_INTERMEDIATES_DIR) ] ; then \
+    jack_res_jar_flags=$$(find $(PRIVATE_JACK_INTERMEDIATES_DIR) -type f \
+        | sed -e "s?^$(PRIVATE_JACK_INTERMEDIATES_DIR)/? -C $(PRIVATE_JACK_INTERMEDIATES_DIR) ?"); \
+    if [ -n "$$jack_res_jar_flags" ] ; then \
+        echo $$jack_res_jar_flags >$(dir $@)jack_res_jar_flags; \
+        jar uf $@ $$jack_res_jar_flags; \
+    fi; \
+fi
+endef
+
 # Sign a package using the specified key/cert.
 #
 define sign-package
@@ -1947,20 +2089,22 @@
 $(hide) mv $@ $@.unaligned
 $(hide) $(ZIPALIGN) \
     -f \
-    $(if $(filter true, $(PRIVATE_PAGE_ALIGN_JNI_SHARED_LIBRARIES)),-p,) \
+    $(ZIPALIGN_PAGE_ALIGN_FLAGS) \
     4 \
     $@.unaligned $@.aligned
 $(hide) mv $@.aligned $@
 endef
 
+# Uncompress shared libraries embedded in an apk.
+#
 define uncompress-shared-libs
-$(hide) rm -rf $(dir $@)/tmpworkdir
-$(hide) mv $@ $@.compressed
-$(hide) mkdir $(dir $@)/tmpworkdir
-$(hide) unzip $@.compressed 'lib/*.so' -d $(dir $@)/tmpworkdir
-$(hide) ( cd $(dir $@)/tmpworkdir && zip -D -r -0 ../$(notdir $@).compressed lib )
-$(hide) mv $@.compressed $@
-$(hide) rm -rf $(dir $@)/tmpworkdir
+$(hide) if unzip -l $@ $(PRIVATE_EMBEDDED_JNI_LIBS) >/dev/null ; then \
+  rm -rf $(dir $@)uncompressedlibs && mkdir $(dir $@)uncompressedlibs; \
+  unzip $@ $(PRIVATE_EMBEDDED_JNI_LIBS) -d $(dir $@)uncompressedlibs && \
+  zip -d $@ 'lib/*.so' && \
+  ( cd $(dir $@)uncompressedlibs && zip -D -r -0 ../$(notdir $@) lib ) && \
+  rm -rf $(dir $@)uncompressedlibs; \
+  fi
 endef
 
 define install-dex-debug
diff --git a/core/dex_preopt_libart.mk b/core/dex_preopt_libart.mk
index 6f598be..1de72b7 100644
--- a/core/dex_preopt_libart.mk
+++ b/core/dex_preopt_libart.mk
@@ -105,7 +105,7 @@
 	--instruction-set=$($(PRIVATE_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_ARCH) \
 	--instruction-set-variant=$($(PRIVATE_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_CPU_VARIANT) \
 	--instruction-set-features=$($(PRIVATE_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES) \
-	--include-patch-information --runtime-arg -Xnorelocate --no-include-debug-symbols --no-include-cfi \
+	--include-patch-information --runtime-arg -Xnorelocate --no-generate-debug-info \
 	--abort-on-hard-verifier-error \
 	$(PRIVATE_DEX_PREOPT_FLAGS)
 endef
diff --git a/core/dex_preopt_libart_boot.mk b/core/dex_preopt_libart_boot.mk
index cfc7653..afd61eb 100644
--- a/core/dex_preopt_libart_boot.mk
+++ b/core/dex_preopt_libart_boot.mk
@@ -62,5 +62,5 @@
 		--instruction-set=$($(PRIVATE_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_ARCH) \
 		--instruction-set-variant=$($(PRIVATE_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_CPU_VARIANT) \
 		--instruction-set-features=$($(PRIVATE_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES) \
-		--android-root=$(PRODUCT_OUT)/system --include-patch-information --runtime-arg -Xnorelocate --no-include-debug-symbols --no-include-cfi \
+		--android-root=$(PRODUCT_OUT)/system --include-patch-information --runtime-arg -Xnorelocate --no-generate-debug-info \
 		$(PRODUCT_DEX_PREOPT_BOOT_FLAGS) $(COMPILED_CLASSES_FLAGS)
diff --git a/core/dpi_specific_apk.mk b/core/dpi_specific_apk.mk
index 06e498d..5d0b5bf 100644
--- a/core/dpi_specific_apk.mk
+++ b/core/dpi_specific_apk.mk
@@ -25,24 +25,35 @@
 $(built_dpi_apk): PRIVATE_MANIFEST_INSTRUMENTATION_FOR := $(LOCAL_INSTRUMENTATION_FOR)
 $(built_dpi_apk): PRIVATE_JNI_SHARED_LIBRARIES := $(jni_shared_libraries_with_abis)
 $(built_dpi_apk): PRIVATE_JNI_SHARED_LIBRARIES_ABI := $(jni_shared_libraries_abis)
-$(built_dpi_apk): PRIVATE_DEX_FILE := $(built_dex)
-# Note that PRIVATE_CLASS_INTERMEDIATES_DIR points to the base apk's intermediate dir.
-$(built_dpi_apk): PRIVATE_CLASS_INTERMEDIATES_DIR := $(intermediates)/classes
-$(built_dpi_apk): PRIVATE_EXTRA_JAR_ARGS := $(extra_jar_args)
 $(built_dpi_apk): PRIVATE_PRIVATE_KEY := $(private_key)
 $(built_dpi_apk): PRIVATE_CERTIFICATE := $(certificate)
 $(built_dpi_apk): PRIVATE_ADDITIONAL_CERTIFICATES := $(foreach c,\
     $(LOCAL_ADDITIONAL_CERTIFICATES), $(c).x509.pem $(c).pk8)
 
+$(built_dpi_apk): PRIVATE_SOURCE_ARCHIVE :=
+ifneq ($(full_classes_jar),)
+$(built_dpi_apk): PRIVATE_DEX_FILE := $(built_dex)
+ifndef LOCAL_JACK_ENABLED
+# Use the jarjar processed arhive as the initial package file.
+$(built_dpi_apk): PRIVATE_SOURCE_ARCHIVE := $(full_classes_jarjar_jar)
+else
+$(built_dpi_apk): PRIVATE_JACK_INTERMEDIATES_DIR := $(intermediates.COMMON)/jack-rsc
+endif # LOCAL_JACK_ENABLED
+$(built_dpi_apk): $(built_dex)
+else
+$(built_dpi_apk): PRIVATE_DEX_FILE :=
+endif # full_classes_jar
+
 # Set up dependenncies and the build recipe.
 $(built_dpi_apk) : $(R_file_stamp)
 $(built_dpi_apk) : $(all_library_res_package_export_deps)
-$(built_dpi_apk) : $(built_dex)
 $(built_dpi_apk) : $(private_key) $(certificate) $(SIGNAPK_JAR)
 $(built_dpi_apk) : $(AAPT) | $(ZIPALIGN)
 $(built_dpi_apk) : $(all_res_assets) $(jni_shared_libraries) $(full_android_manifest)
 	@echo "target Package: $(PRIVATE_MODULE) ($@)"
-	$(create-empty-package)
+	$(if $(PRIVATE_SOURCE_ARCHIVE),\
+	  $(call initialize-package-file,$(PRIVATE_SOURCE_ARCHIVE),$@),\
+	  $(create-empty-package))
 	$(add-assets-to-package)
 ifneq ($(jni_shared_libraries),)
 	$(add-jni-shared-libs-to-package)
@@ -52,10 +63,9 @@
 	$(if $(PRIVATE_EXTRA_JAR_ARGS),$(call add-java-resources-to,$@))
 else
 	$(add-dex-to-package)
+ifdef LOCAL_JACK_ENABLED
+	$(add-carried-jack-resources)
 endif
-	$(add-carried-java-resources)
-ifneq ($(extra_jar_args),)
-	$(add-java-resources-to-package)
 endif
 	$(sign-package)
 	$(align-package)
diff --git a/core/dynamic_binary.mk b/core/dynamic_binary.mk
index fe498ed..38c0cbe 100644
--- a/core/dynamic_binary.mk
+++ b/core/dynamic_binary.mk
@@ -39,6 +39,40 @@
 ###################################
 
 ###########################################################
+## Pack relocation tables
+###########################################################
+relocation_packer_input := $(linked_module)
+relocation_packer_output := $(intermediates)/PACKED/$(my_built_module_stem)
+
+my_pack_module_relocations := $(LOCAL_PACK_MODULE_RELOCATIONS)
+
+ifeq ($(my_pack_module_relocations),)
+  my_pack_module_relocations := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_PACK_MODULE_RELOCATIONS)
+endif
+
+# Do not pack relocations for executables. Because packing results in
+# non-zero p_vaddr which causes kernel to load executables to lower
+# address (starting at 0x8000) http://b/20665974
+ifeq ($(LOCAL_MODULE_CLASS),EXECUTABLES)
+  my_pack_module_relocations := false
+endif
+
+# TODO (dimitry): Relocation packer is not yet available for darwin
+ifneq ($(HOST_OS),linux)
+  my_pack_module_relocations := false
+endif
+
+ifeq (true,$(my_pack_module_relocations))
+# Pack relocations
+$(relocation_packer_output): $(relocation_packer_input) | $(ACP)
+	$(pack-elf-relocations)
+else
+$(relocation_packer_output): $(relocation_packer_input) | $(ACP)
+	@echo "target Unpacked: $(PRIVATE_MODULE) ($@)"
+	$(copy-file-to-target)
+endif
+
+###########################################################
 ## Store a copy with symbols for symbolic debugging
 ###########################################################
 ifeq ($(LOCAL_UNSTRIPPED_PATH),)
@@ -46,7 +80,7 @@
 else
 my_unstripped_path := $(LOCAL_UNSTRIPPED_PATH)
 endif
-symbolic_input := $(linked_module)
+symbolic_input := $(relocation_packer_output)
 symbolic_output := $(my_unstripped_path)/$(my_installed_module_stem)
 $(symbolic_output) : $(symbolic_input) | $(ACP)
 	@echo "target Symbolic: $(PRIVATE_MODULE) ($@)"
@@ -57,7 +91,7 @@
 ## Strip
 ###########################################################
 strip_input := $(symbolic_output)
-strip_output := $(intermediates)/STRIPPED/$(my_built_module_stem)
+strip_output := $(LOCAL_BUILT_MODULE)
 
 my_strip_module := $(LOCAL_STRIP_MODULE)
 ifeq ($(my_strip_module),)
@@ -107,38 +141,6 @@
 endif
 endif # my_strip_module
 
-###########################################################
-## Pack relocation tables
-###########################################################
-relocation_packer_input := $(strip_output)
-relocation_packer_output := $(LOCAL_BUILT_MODULE)
-
-my_pack_module_relocations := $(LOCAL_PACK_MODULE_RELOCATIONS)
-
-ifeq ($(my_pack_module_relocations),)
-  my_pack_module_relocations := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_PACK_MODULE_RELOCATIONS)
-endif
-
-# Do not pack relocations for static executables.
-ifeq ($(LOCAL_FORCE_STATIC_EXECUTABLE),true)
-  my_pack_module_relocations := false
-endif
-
-# TODO (dimitry): Relocation packer is not yet available for darwin
-ifneq ($(HOST_OS),linux)
-  my_pack_module_relocations := false
-endif
-
-ifeq (true,$(my_pack_module_relocations))
-# Pack relocations
-$(relocation_packer_output): $(relocation_packer_input) | $(ACP)
-	$(pack-elf-relocations)
-else
-$(relocation_packer_output): $(relocation_packer_input) | $(ACP)
-	@echo "target Unpacked: $(PRIVATE_MODULE) ($@)"
-	$(copy-file-to-target)
-endif
-
 $(cleantarget): PRIVATE_CLEAN_FILES += \
     $(linked_module) \
     $(symbolic_output) \
diff --git a/core/executable_internal.mk b/core/executable_internal.mk
index 2684d51..cdaf293 100644
--- a/core/executable_internal.mk
+++ b/core/executable_internal.mk
@@ -37,7 +37,11 @@
 my_target_global_ld_dirs := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_LD_DIRS)
 my_target_libprofile_rt := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBPROFILE_RT)
 my_target_libgcov := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBGCOV)
+ifeq ($(LOCAL_NO_LIBGCC),true)
+my_target_libgcc :=
+else
 my_target_libgcc := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBGCC)
+endif
 my_target_libatomic := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBATOMIC)
 my_target_crtbegin_dynamic_o := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_CRTBEGIN_DYNAMIC_O)
 my_target_crtbegin_static_o := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_CRTBEGIN_STATIC_O)
diff --git a/core/executable_prefer_symlink.mk b/core/executable_prefer_symlink.mk
index 2326e83..fc97ad3 100644
--- a/core/executable_prefer_symlink.mk
+++ b/core/executable_prefer_symlink.mk
@@ -39,7 +39,10 @@
   endif
 endif
 
-$(my_symlink): $(LOCAL_INSTALLED_MODULE) $(LOCAL_MODULE_MAKEFILE)
+# $(my_symlink) doesn't need to depend on $(PRIVATE_SRC_BINARY_NAME): we can generate symlink to nonexistent file.
+# If you add the dependency, make would compare the timestamp of a file against that of its symlink:
+# they are always equal, because make follows symlink.
+$(my_symlink): $(LOCAL_MODULE_MAKEFILE)
 	@echo "Symlink: $@ -> $(PRIVATE_SRC_BINARY_NAME)"
 	@mkdir -p $(dir $@)
 	@rm -rf $@
diff --git a/core/host_dalvik_java_library.mk b/core/host_dalvik_java_library.mk
index f8264ee..4814d70 100644
--- a/core/host_dalvik_java_library.mk
+++ b/core/host_dalvik_java_library.mk
@@ -34,11 +34,13 @@
 full_classes_compiled_jar := $(intermediates.COMMON)/classes-full-debug.jar
 full_classes_jarjar_jar := $(intermediates.COMMON)/classes-jarjar.jar
 full_classes_jar := $(intermediates.COMMON)/classes.jar
+full_classes_jack := $(intermediates.COMMON)/classes.jack
 built_dex := $(intermediates.COMMON)/classes.dex
 
 LOCAL_INTERMEDIATE_TARGETS += \
     $(full_classes_compiled_jar) \
     $(full_classes_jarjar_jar) \
+    $(full_classes_jack) \
     $(full_classes_jar) \
     $(built_dex)
 
@@ -61,6 +63,7 @@
 	PRIVATE_CLASS_INTERMEDIATES_DIR := $(intermediates.COMMON)/classes
 $(LOCAL_INTERMEDIATE_TARGETS): \
 	PRIVATE_SOURCE_INTERMEDIATES_DIR := $(LOCAL_INTERMEDIATE_SOURCE_DIR)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_RMTYPEDEFS :=
 
 $(cleantarget): PRIVATE_CLEAN_FILES += $(intermediates.COMMON)
 
@@ -69,7 +72,6 @@
 $(full_classes_compiled_jar): PRIVATE_JAR_EXCLUDE_FILES :=
 $(full_classes_compiled_jar): PRIVATE_JAR_PACKAGES :=
 $(full_classes_compiled_jar): PRIVATE_JAR_EXCLUDE_PACKAGES :=
-$(full_classes_compiled_jar): PRIVATE_RMTYPEDEFS :=
 $(full_classes_compiled_jar): \
         $(java_sources) \
         $(java_resource_sources) \
@@ -96,6 +98,7 @@
 	@echo Copying: $@
 	$(hide) $(ACP) -fp $< $@
 
+ifndef LOCAL_JACK_ENABLED
 $(built_dex): PRIVATE_INTERMEDIATES_DIR := $(intermediates.COMMON)
 $(built_dex): PRIVATE_DX_FLAGS := $(LOCAL_DX_FLAGS)
 $(built_dex): $(full_classes_jar) $(DX)
@@ -109,6 +112,42 @@
 	$(call initialize-package-file,$(PRIVATE_SOURCE_ARCHIVE),$@)
 	$(add-dex-to-package)
 
+else # LOCAL_JACK_ENABLED
+$(LOCAL_INTERMEDIATE_TARGETS): \
+	PRIVATE_JACK_INTERMEDIATES_DIR := $(intermediates.COMMON)/jack-rsc
+
+ifeq ($(LOCAL_JACK_ENABLED),incremental)
+$(LOCAL_INTERMEDIATE_TARGETS): \
+	PRIVATE_JACK_INCREMENTAL_DIR := $(intermediates.COMMON)/jack-incremental
+else
+$(LOCAL_INTERMEDIATE_TARGETS): \
+	PRIVATE_JACK_INCREMENTAL_DIR :=
+endif
+$(LOCAL_INTERMEDIATE_TARGETS):  PRIVATE_JACK_DEBUG_FLAGS := -g
+
+$(built_dex): PRIVATE_CLASSES_JACK := $(full_classes_jack)
+$(built_dex): PRIVATE_JACK_FLAGS := $(LOCAL_JACK_FLAGS)
+$(built_dex): $(java_sources) $(java_resource_sources) $(full_jack_lib_deps) \
+        $(jar_manifest_file) $(proto_java_sources_file_stamp) $(LOCAL_MODULE_MAKEFILE) \
+        $(LOCAL_MODULE_MAKEFILE) $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JACK_JAR) $(JACK_LAUNCHER_JAR)
+	@echo Building with Jack: $@
+	$(jack-java-to-dex)
+
+# $(full_classes_jack) is just by-product of $(built_dex).
+# The dummy command was added because, without it, make misses the fact the $(built_dex) also
+# change $(full_classes_jack).
+$(full_classes_jack): $(built_dex)
+	$(hide) touch $@
+
+$(LOCAL_BUILT_MODULE): PRIVATE_DEX_FILE := $(built_dex)
+$(LOCAL_BUILT_MODULE): $(built_dex) $(java_resource_sources)
+	@echo "Host Jar: $(PRIVATE_MODULE) ($@)"
+	$(create-empty-package)
+	$(add-dex-to-package)
+	$(add-carried-jack-resources)
+
+endif # LOCAL_JACK_ENABLED
+
 USE_CORE_LIB_BOOTCLASSPATH :=
 
 endif
diff --git a/core/host_dalvik_static_java_library.mk b/core/host_dalvik_static_java_library.mk
index 9e5aaa3..90bcc12 100644
--- a/core/host_dalvik_static_java_library.mk
+++ b/core/host_dalvik_static_java_library.mk
@@ -21,11 +21,37 @@
 #
 ifeq ($(HOST_OS),linux)
 
+LOCAL_UNINSTALLABLE_MODULE := true
+LOCAL_IS_STATIC_JAVA_LIBRARY := true
 USE_CORE_LIB_BOOTCLASSPATH := true
 LOCAL_JAVA_LIBRARIES += core-libart-hostdex
 
+intermediates.COMMON := $(call intermediates-dir-for,JAVA_LIBRARIES,$(LOCAL_MODULE),true,COMMON,)
+full_classes_jack := $(intermediates.COMMON)/classes.jack
+LOCAL_INTERMEDIATE_TARGETS += \
+    $(full_classes_jack)
+
 include $(BUILD_SYSTEM)/host_java_library.mk
+# proguard is not supported
+# *.proto files are not supported
+$(full_classes_jack): PRIVATE_JACK_FLAGS := $(LOCAL_JACK_FLAGS)
+$(full_classes_jack): PRIVATE_JARJAR_RULES := $(LOCAL_JARJAR_RULES)
+$(full_classes_jack): \
+	PRIVATE_JACK_INTERMEDIATES_DIR := $(intermediates.COMMON)/jack-rsc
+ifeq ($(LOCAL_JACK_ENABLED),incremental)
+$(full_classes_jack): \
+	PRIVATE_JACK_INCREMENTAL_DIR := $(intermediates.COMMON)/jack-incremental
+else
+$(full_classes_jack): \
+	PRIVATE_JACK_INCREMENTAL_DIR :=
+endif
+$(full_classes_jack): $(java_sources) $(java_resource_sources) $(full_jack_lib_deps) \
+        $(jar_manifest_file) $(layers_file) $(LOCAL_MODULE_MAKEFILE) \
+        $(LOCAL_ADDITIONAL_DEPENDENCIES) $(LOCAL_JARJAR_RULES) \
+        $(JACK_JAR) $(JACK_LAUNCHER_JAR)
+	@echo Building with Jack: $@
+	$(java-to-jack)
 
 USE_CORE_LIB_BOOTCLASSPATH :=
-
+LOCAL_IS_STATIC_JAVA_LIBRARY :=
 endif
diff --git a/core/host_java_library.mk b/core/host_java_library.mk
index b751c5f..47189d7 100644
--- a/core/host_java_library.mk
+++ b/core/host_java_library.mk
@@ -43,6 +43,8 @@
 include $(BUILD_SYSTEM)/base_rules.mk
 #######################################
 
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_RMTYPEDEFS :=
+
 ifeq (true,$(LOCAL_EMMA_INSTRUMENT))
 $(full_classes_emma_jar): PRIVATE_EMMA_COVERAGE_FILE := $(intermediates.COMMON)/coverage.em
 $(full_classes_emma_jar): PRIVATE_EMMA_INTERMEDIATES_DIR := $(emma_intermediates_dir)
@@ -58,13 +60,13 @@
 $(full_classes_emma_jar) : $(full_classes_compiled_jar) | $(EMMA_JAR)
 	$(transform-classes.jar-to-emma)
 
-$(LOCAL_BUILT_MODULE) : $(full_classes_emma_jar)
+$(built_javalib_jar) : $(full_classes_emma_jar)
 	@echo Copying: $@
 	$(hide) $(ACP) -fp $< $@
 
 else # LOCAL_EMMA_INSTRUMENT
-# Directly build into LOCAL_BUILT_MODULE.
-full_classes_compiled_jar := $(LOCAL_BUILT_MODULE)
+# Directly build into $(built_javalib_jar).
+full_classes_compiled_jar := $(built_javalib_jar)
 endif # LOCAL_EMMA_INSTRUMENT
 
 $(full_classes_compiled_jar): PRIVATE_JAVAC_DEBUG_FLAGS := -g
@@ -78,7 +80,6 @@
 $(full_classes_compiled_jar): PRIVATE_JAR_EXCLUDE_FILES :=
 $(full_classes_compiled_jar): PRIVATE_JAR_PACKAGES :=
 $(full_classes_compiled_jar): PRIVATE_JAR_EXCLUDE_PACKAGES :=
-$(full_classes_compiled_jar): PRIVATE_RMTYPEDEFS :=
 $(full_classes_compiled_jar): \
         $(java_sources) \
         $(java_resource_sources) \
diff --git a/core/host_java_library_common.mk b/core/host_java_library_common.mk
index cd9e679..35a6e28 100644
--- a/core/host_java_library_common.mk
+++ b/core/host_java_library_common.mk
@@ -23,6 +23,22 @@
 LOCAL_IS_HOST_MODULE := true
 LOCAL_BUILT_MODULE_STEM := javalib.jar
 
+intermediates := $(call local-intermediates-dir)
+intermediates.COMMON := $(call local-intermediates-dir,COMMON)
+
+built_javalib_jar := $(intermediates)/javalib.jar
+
+#################################
+include $(BUILD_SYSTEM)/configure_local_jack.mk
+#################################
+
+ifdef LOCAL_JACK_ENABLED
+ifdef LOCAL_IS_STATIC_JAVA_LIBRARY
+LOCAL_BUILT_MODULE_STEM := classes.jack
+LOCAL_INTERMEDIATE_TARGETS += $(built_javalib_jar)
+endif
+endif
+
 # base_rules.mk looks at this
 all_res_assets :=
 
@@ -34,14 +50,15 @@
   ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),nano)
     LOCAL_JAVA_LIBRARIES += host-libprotobuf-java-nano
   else
-    LOCAL_JAVA_LIBRARIES += host-libprotobuf-java-lite
+    ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),full)
+      LOCAL_JAVA_LIBRARIES += host-libprotobuf-java-full
+    else
+      LOCAL_JAVA_LIBRARIES += host-libprotobuf-java-lite
+    endif
   endif
 endif
 endif
 
-intermediates := $(call local-intermediates-dir)
-intermediates.COMMON := $(call local-intermediates-dir,COMMON)
-
 LOCAL_INTERMEDIATE_SOURCE_DIR := $(intermediates.COMMON)/src
 LOCAL_JAVA_LIBRARIES := $(sort $(LOCAL_JAVA_LIBRARIES))
 
diff --git a/core/install_jni_libs.mk b/core/install_jni_libs.mk
index da3032d..625a8a2 100644
--- a/core/install_jni_libs.mk
+++ b/core/install_jni_libs.mk
@@ -8,7 +8,7 @@
 #
 # Output variables:
 #   jni_shared_libraries, jni_shared_libraries_abi, jni_shared_libraries_with_abis if we are going to embed the libraries into the apk;
-#   extracted_jni_libs, if we extract jni libs from prebuilt apk.
+#   embedded_prebuilt_jni_libs, prebuilt jni libs embedded in prebuilt apk.
 #
 
 my_embed_jni :=
@@ -27,7 +27,7 @@
 jni_shared_libraries_abis :=
 # jni_shared_libraries_with_abis is a list of <abi>:<path-to-the-built-jni-lib>
 jni_shared_libraries_with_abis :=
-extracted_jni_libs :=
+embedded_prebuilt_jni_libs :=
 
 #######################################
 # For TARGET_ARCH
@@ -51,7 +51,7 @@
 jni_shared_libraries_abis += $(my_jni_shared_libraries_abi)
 jni_shared_libraries_with_abis += $(addprefix $(my_jni_shared_libraries_abi):,\
     $(my_jni_shared_libraries))
-extracted_jni_libs += $(my_extracted_jni_libs)
+embedded_prebuilt_jni_libs += $(my_embedded_prebuilt_jni_libs)
 
 # Include RS dynamically-generated libraries as well
 # TODO: Add multilib support once RS supports generating multilib libraries.
@@ -83,11 +83,11 @@
 jni_shared_libraries_abis += $(my_jni_shared_libraries_abi)
 jni_shared_libraries_with_abis += $(addprefix $(my_jni_shared_libraries_abi):,\
     $(my_jni_shared_libraries))
-extracted_jni_libs += $(my_extracted_jni_libs)
+embedded_prebuilt_jni_libs += $(my_embedded_prebuilt_jni_libs)
 endif  # my_add_jni
 endif  # TARGET_2ND_ARCH
 
 jni_shared_libraries := $(strip $(jni_shared_libraries))
 jni_shared_libraries_abis := $(sort $(jni_shared_libraries_abis))
 jni_shared_libraries_with_abis := $(strip $(jni_shared_libraries_with_abis))
-extracted_jni_libs := $(strip $(extracted_jni_libs))
+embedded_prebuilt_jni_libs := $(strip $(embedded_prebuilt_jni_libs))
diff --git a/core/install_jni_libs_internal.mk b/core/install_jni_libs_internal.mk
index c28bb15..16d0962 100644
--- a/core/install_jni_libs_internal.mk
+++ b/core/install_jni_libs_internal.mk
@@ -9,7 +9,7 @@
 #
 # Output variables:
 #   my_jni_shared_libraries, my_jni_shared_libraries_abi, if we are going to embed the libraries into the apk;
-#   my_extracted_jni_libs, if we extract jni libs from prebuilt apk.
+#   my_embedded_prebuilt_jni_libs, prebuilt jni libs embedded in prebuilt apk.
 #
 
 my_jni_shared_libraries := \
@@ -19,7 +19,7 @@
 
 # App-specific lib path.
 my_app_lib_path := $(dir $(LOCAL_INSTALLED_MODULE))lib/$(TARGET_$(my_2nd_arch_prefix)ARCH)
-my_extracted_jni_libs :=
+my_embedded_prebuilt_jni_libs :=
 
 ifdef my_embed_jni
 # App explicitly requires the prebuilt NDK stl shared libraies.
@@ -76,25 +76,10 @@
 endif  # my_embed_jni
 
 ifdef my_prebuilt_jni_libs
-# Install prebuilt JNI libs to the app specific lib path.
-# Files like @path/to/libfoo.so (path inside the apk) are JNI libs extracted from the prebuilt apk;
+# Files like @lib/<abi>/libfoo.so (path inside the apk) are JNI libs embedded prebuilt apk;
 # Files like path/to/libfoo.so (path relative to LOCAL_PATH) are prebuilts in the source tree.
-my_extracted_jni_libs := $(patsubst @%,%, \
+my_embedded_prebuilt_jni_libs := $(patsubst @%,%, \
     $(filter @%, $(my_prebuilt_jni_libs)))
-ifdef my_extracted_jni_libs
-ifndef my_prebuilt_src_file
-$(error No prebuilt apk to extract prebuilt jni libraries $(my_extracted_jni_libs))
-endif
-# We use the first jni lib file as dependency.
-my_installed_prebuilt_jni := $(my_app_lib_path)/$(notdir $(firstword $(my_extracted_jni_libs)))
-$(my_installed_prebuilt_jni): PRIVATE_JNI_LIBS := $(my_extracted_jni_libs)
-$(my_installed_prebuilt_jni): $(my_prebuilt_src_file)
-	@echo "Extract JNI libs ($@ <- $<)"
-	@mkdir -p $(dir $@)
-	$(hide) unzip -j -o -d $(dir $@) $< $(PRIVATE_JNI_LIBS) && touch $@
-
-$(LOCAL_INSTALLED_MODULE) : | $(my_installed_prebuilt_jni)
-endif
 
 # prebuilt JNI exsiting as separate source files.
 my_prebuilt_jni_libs := $(addprefix $(LOCAL_PATH)/, \
diff --git a/core/jack-default.args b/core/jack-default.args
new file mode 100644
index 0000000..8d70a82
--- /dev/null
+++ b/core/jack-default.args
@@ -0,0 +1,5 @@
+-D sched.runner=multi-threaded
+-D sched.runner.thread.kind=fixed
+-D sched.runner.thread.fixed.count=4
+--sanity-checks off
+-D jack.reporter.level.file=error=--,warning=-
\ No newline at end of file
diff --git a/core/java.mk b/core/java.mk
index fc4703c..bac5ca7 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -7,7 +7,9 @@
 ifeq ($(TARGET_BUILD_PDK_JAVA_PLATFORM),)
 # LOCAL_SDK not defined or set to current
 ifeq ($(filter-out current,$(LOCAL_SDK_VERSION)),)
+ifneq ($(LOCAL_NO_STANDARD_LIBRARIES),true)
 LOCAL_SDK_VERSION := $(PDK_BUILD_SDK_VERSION)
+endif #!LOCAL_NO_STANDARD_LIBRARIES
 endif
 endif # !PDK_JAVA
 endif #PDK
@@ -112,6 +114,10 @@
 full_classes_jar := $(intermediates.COMMON)/classes.jar
 built_dex := $(intermediates.COMMON)/classes.dex
 endif
+# final Jack library, shrinked and obfuscated if it must be
+full_classes_jack := $(intermediates.COMMON)/classes.jack
+# intermediate Jack library without shrink and obfuscation
+noshrob_classes_jack := $(intermediates.COMMON)/classes.noshrob.jack
 
 LOCAL_INTERMEDIATE_TARGETS += \
     $(full_classes_compiled_jar) \
@@ -120,6 +126,8 @@
     $(full_classes_jar) \
     $(full_classes_proguard_jar) \
     $(built_dex_intermediate) \
+    $(full_classes_jack) \
+    $(noshrob_classes_jack) \
     $(built_dex) \
     $(full_classes_stubs_jar)
 
@@ -140,19 +148,29 @@
 RenderScript_file_stamp := $(LOCAL_INTERMEDIATE_SOURCE_DIR)/RenderScript.stamp
 renderscript_intermediate.COMMON := $(LOCAL_INTERMEDIATE_SOURCE_DIR)/renderscript
 
+# Defaulting to an empty string uses the latest available platform SDK.
 renderscript_target_api :=
 
 ifneq (,$(LOCAL_RENDERSCRIPT_TARGET_API))
-renderscript_target_api := $(LOCAL_RENDERSCRIPT_TARGET_API)
+  renderscript_target_api := $(LOCAL_RENDERSCRIPT_TARGET_API)
 else
-ifneq (,$(LOCAL_SDK_VERSION))
-# Set target-api for LOCAL_SDK_VERSIONs other than current.
-ifneq (,$(filter-out current system_current, $(LOCAL_SDK_VERSION)))
-renderscript_target_api := $(LOCAL_SDK_VERSION)
-endif
-endif  # LOCAL_SDK_VERSION is set
+  ifneq (,$(LOCAL_SDK_VERSION))
+    # Set target-api for LOCAL_SDK_VERSIONs other than current.
+    ifneq (,$(filter-out current system_current, $(LOCAL_SDK_VERSION)))
+      renderscript_target_api := $(LOCAL_SDK_VERSION)
+    endif
+  endif  # LOCAL_SDK_VERSION is set
 endif  # LOCAL_RENDERSCRIPT_TARGET_API is set
 
+# For 64-bit, we always have to upgrade to at least 21 for compat build.
+ifneq ($(LOCAL_RENDERSCRIPT_COMPATIBILITY),)
+  ifeq ($(TARGET_IS_64_BIT),true)
+    ifneq ($(filter $(RSCOMPAT_32BIT_ONLY_API_LEVELS),$(renderscript_target_api)),)
+      renderscript_target_api := 21
+    endif
+  endif
+endif
+
 ifeq ($(LOCAL_RENDERSCRIPT_CC),)
 LOCAL_RENDERSCRIPT_CC := $(LLVM_RS_CC)
 endif
@@ -245,7 +263,7 @@
 $(rs_compatibility_jni_libs): $(RenderScript_file_stamp) $(RS_PREBUILT_CLCORE) \
     $(rs_support_lib) $(rs_support_io_lib) $(rs_jni_lib) $(rs_compiler_rt)
 $(rs_compatibility_jni_libs): $(BCC_COMPAT)
-$(rs_compatibility_jni_libs): PRIVATE_CXX := $(TARGET_CXX)
+$(rs_compatibility_jni_libs): PRIVATE_CXX := $(CXX_WRAPPER) $(TARGET_CXX)
 $(rs_compatibility_jni_libs): $(renderscript_intermediate)/librs.%.so: \
     $(renderscript_intermediate.bc_folder)%.bc
 	$(transform-bc-to-so)
@@ -322,6 +340,7 @@
 	PRIVATE_CLASS_INTERMEDIATES_DIR := $(intermediates.COMMON)/classes
 $(LOCAL_INTERMEDIATE_TARGETS): \
 	PRIVATE_SOURCE_INTERMEDIATES_DIR := $(LOCAL_INTERMEDIATE_SOURCE_DIR)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_RMTYPEDEFS := $(LOCAL_RMTYPEDEFS)
 
 # Since we're using intermediates.COMMON, make sure that it gets cleaned
 # properly.
@@ -338,7 +357,7 @@
 # - This extra copy, with the dependency on LOCAL_BUILT_MODULE allows the
 #   PRIVATE_ vars to be preserved.
 $(full_classes_stubs_jar): PRIVATE_SOURCE_FILE := $(full_classes_jar)
-$(full_classes_stubs_jar) : $(LOCAL_BUILT_MODULE) | $(ACP)
+$(full_classes_stubs_jar) : $(full_classes_jar) | $(ACP)
 	@echo Copying $(PRIVATE_SOURCE_FILE)
 	$(hide) $(ACP) -fp $(PRIVATE_SOURCE_FILE) $@
 ALL_MODULES.$(LOCAL_MODULE).STUBS := $(full_classes_stubs_jar)
@@ -361,7 +380,6 @@
 $(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_RMTYPEDEFS := $(LOCAL_RMTYPEDEFS)
 $(full_classes_compiled_jar): PRIVATE_DONT_DELETE_JAR_META_INF := $(LOCAL_DONT_DELETE_JAR_META_INF)
 $(full_classes_compiled_jar): \
         $(java_sources) \
@@ -424,50 +442,78 @@
     $(error invalid value for LOCAL_PROGUARD_ENABLED: $(LOCAL_PROGUARD_ENABLED))
 endif
 proguard_dictionary := $(intermediates.COMMON)/proguard_dictionary
-proguard_flags := $(addprefix -libraryjars ,$(full_shared_java_libs)) \
+
+# Hack: see b/20667396
+# When an app's LOCAL_SDK_VERSION is lower than the support library's LOCAL_SDK_VERSION,
+# we artifically raises the "SDK version" "linked" by ProGuard, to
+# - suppress ProGuard warnings of referencing symbols unknown to the lower SDK version.
+# - prevent ProGuard stripping subclass in the support library that extends class added in the higher SDK version.
+my_support_library_sdk_raise :=
+ifneq (,$(filter android-support-%,$(LOCAL_STATIC_JAVA_LIBRARIES)))
+ifdef LOCAL_SDK_VERSION
+ifdef TARGET_BUILD_APPS
+ifeq (,$(filter current system_current, $(LOCAL_SDK_VERSION)))
+  my_support_library_sdk_raise := $(call java-lib-files, sdk_vcurrent)
+endif
+else
+  # For platform build, we can't just raise to the "current" SDK,
+  # that would break apps that use APIs removed from the current SDK.
+  my_support_library_sdk_raise := $(call java-lib-files,$(TARGET_DEFAULT_JAVA_LIBRARIES))
+endif
+endif
+endif
+
+# jack already has the libraries in its classpath and doesn't support jars
+legacy_proguard_flags := $(addprefix -libraryjars ,$(my_support_library_sdk_raise) $(full_shared_java_libs))
+common_proguard_flags :=  \
                   -forceprocessing \
                   -printmapping $(proguard_dictionary)
 
 ifeq ($(filter nosystem,$(LOCAL_PROGUARD_ENABLED)),)
-proguard_flags += -include $(BUILD_SYSTEM)/proguard.flags
+common_proguard_flags += -include $(BUILD_SYSTEM)/proguard.flags
 ifeq ($(LOCAL_EMMA_INSTRUMENT),true)
-proguard_flags += -include $(BUILD_SYSTEM)/proguard.emma.flags
+common_proguard_flags += -include $(BUILD_SYSTEM)/proguard.emma.flags
 endif
 # If this is a test package, add proguard keep flags for tests.
 ifneq ($(LOCAL_INSTRUMENTATION_FOR)$(filter tests,$(LOCAL_MODULE_TAGS)),)
-proguard_flags += -include $(BUILD_SYSTEM)/proguard_tests.flags
+common_proguard_flags += -include $(BUILD_SYSTEM)/proguard_tests.flags
 ifeq ($(filter shrinktests,$(LOCAL_PROGUARD_ENABLED)),)
-proguard_flags += -dontshrink # don't shrink tests by default
+common_proguard_flags += -dontshrink # don't shrink tests by default
 endif # shrinktests
 endif # test package
 ifeq ($(filter obfuscation,$(LOCAL_PROGUARD_ENABLED)),)
 # By default no obfuscation
-proguard_flags += -dontobfuscate
+common_proguard_flags += -dontobfuscate
 endif  # No obfuscation
 ifeq ($(filter optimization,$(LOCAL_PROGUARD_ENABLED)),)
 # By default no optimization
-proguard_flags += -dontoptimize
+common_proguard_flags += -dontoptimize
 endif  # No optimization
 
 ifdef LOCAL_INSTRUMENTATION_FOR
 ifeq ($(filter obfuscation,$(LOCAL_PROGUARD_ENABLED)),)
 # If no obfuscation, link in the instrmented package's classes.jar as a library.
 # link_instr_classes_jar is defined in base_rule.mk
-proguard_flags += -libraryjars $(link_instr_classes_jar)
+# jack already has this library in its classpath and doesn't support jars
+legacy_proguard_flags += -libraryjars $(link_instr_classes_jar)
 else # obfuscation
 # If obfuscation is enabled, the main app must be obfuscated too.
 # We need to run obfuscation using the main app's dictionary,
 # and treat the main app's class.jar as injars instead of libraryjars.
-proguard_flags := -injars  $(link_instr_classes_jar) \
+legacy_proguard_flags := -injars  $(link_instr_classes_jar) \
     -outjars $(intermediates.COMMON)/proguard.$(LOCAL_INSTRUMENTATION_FOR).jar \
     -include $(link_instr_intermediates_dir.COMMON)/proguard_options \
     -applymapping $(link_instr_intermediates_dir.COMMON)/proguard_dictionary \
     -verbose \
-    $(proguard_flags)
+    $(legacy_proguard_flags)
+# not supported with jack
+ifdef LOCAL_JACK_ENABLED
+    $(error $(LOCAL_MODULE): Build with jack of instrumentation when obfuscating is not yet supported)
+endif
 
 # Sometimes (test + main app) uses different keep rules from the main app -
 # apply the main app's dictionary anyway.
-proguard_flags += -ignorewarnings
+legacy_proguard_flags += -ignorewarnings
 
 # Make sure we run Proguard on the main app first
 $(full_classes_proguard_jar) : $(link_instr_intermediates_dir.COMMON)/proguard.classes.jar
@@ -485,8 +531,8 @@
 extra_input_jar :=
 endif
 $(full_classes_proguard_jar): PRIVATE_EXTRA_INPUT_JAR := $(extra_input_jar)
-$(full_classes_proguard_jar): PRIVATE_PROGUARD_FLAGS := $(proguard_flags) $(LOCAL_PROGUARD_FLAGS)
-$(full_classes_proguard_jar) : $(full_classes_jar) $(extra_input_jar) $(proguard_flag_files) | $(ACP) $(PROGUARD)
+$(full_classes_proguard_jar): PRIVATE_PROGUARD_FLAGS := $(legacy_proguard_flags) $(common_proguard_flags) $(LOCAL_PROGUARD_FLAGS)
+$(full_classes_proguard_jar) : $(full_classes_jar) $(extra_input_jar) $(my_support_library_sdk_raise) $(proguard_flag_files) | $(ACP) $(PROGUARD)
 	$(call transform-jar-to-proguard)
 
 else  # LOCAL_PROGUARD_ENABLED not defined
@@ -496,7 +542,7 @@
 
 endif # LOCAL_PROGUARD_ENABLED defined
 
-
+ifndef LOCAL_JACK_ENABLED
 # Override PRIVATE_INTERMEDIATES_DIR so that install-dex-debug
 # will work even when intermediates != intermediates.COMMON.
 $(built_dex_intermediate): PRIVATE_INTERMEDIATES_DIR := $(intermediates.COMMON)
@@ -512,6 +558,8 @@
 endif
 $(built_dex_intermediate): $(full_classes_proguard_jar) $(DX)
 	$(transform-classes.jar-to-dex)
+endif # LOCAL_JACK_ENABLED is disabled
+
 $(built_dex): $(built_dex_intermediate) | $(ACP)
 	@echo Copying: $@
 	$(hide) mkdir -p $(dir $@)
@@ -522,17 +570,14 @@
 endif
 
 findbugs_xml := $(intermediates.COMMON)/findbugs.xml
-$(findbugs_xml) : PRIVATE_JAR_FILE := $(full_classes_jar)
 $(findbugs_xml) : PRIVATE_AUXCLASSPATH := $(addprefix -auxclasspath ,$(strip \
 								$(call normalize-path-list,$(filter %.jar,\
 										$(full_java_libs)))))
-# We can't depend directly on full_classes_jar because the PRIVATE_
-# vars won't be set up correctly.
-$(findbugs_xml) : $(LOCAL_BUILT_MODULE)
+$(findbugs_xml) : $(full_classes_jar)
 	@echo Findbugs: $@
 	$(hide) $(FINDBUGS) -textui -effort:min -xml:withMessages \
 		$(PRIVATE_AUXCLASSPATH) \
-		$(PRIVATE_JAR_FILE) \
+		$< \
 		> $@
 
 ALL_FINDBUGS_FILES += $(findbugs_xml)
@@ -549,3 +594,72 @@
 $(LOCAL_MODULE)-findbugs : $(findbugs_html)
 
 endif  # full_classes_jar is defined
+
+ifdef LOCAL_JACK_ENABLED
+$(LOCAL_INTERMEDIATE_TARGETS): \
+	PRIVATE_JACK_INTERMEDIATES_DIR := $(intermediates.COMMON)/jack-rsc
+ifeq ($(LOCAL_JACK_ENABLED),incremental)
+$(LOCAL_INTERMEDIATE_TARGETS): \
+	PRIVATE_JACK_INCREMENTAL_DIR := $(intermediates.COMMON)/jack-incremental
+else
+$(LOCAL_INTERMEDIATE_TARGETS): \
+	PRIVATE_JACK_INCREMENTAL_DIR :=
+endif
+
+ifdef full_classes_jar
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_DEBUG_FLAGS := -g
+
+ifdef LOCAL_PROGUARD_ENABLED
+
+ifndef LOCAL_JACK_PROGUARD_FLAGS
+    LOCAL_JACK_PROGUARD_FLAGS := $(LOCAL_PROGUARD_FLAGS)
+endif
+LOCAL_JACK_PROGUARD_FLAGS += $(addprefix -include , $(proguard_flag_files))
+ifdef LOCAL_TEST_MODULE_TO_PROGUARD_WITH
+    $(error $(LOCAL_MODULE): Build with jack when LOCAL_TEST_MODULE_TO_PROGUARD_WITH is defined is not yet implemented)
+endif
+
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_PROGUARD_FLAGS := $(common_proguard_flags) $(LOCAL_JACK_PROGUARD_FLAGS)
+else  # LOCAL_PROGUARD_ENABLED not defined
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_PROGUARD_FLAGS :=
+endif # LOCAL_PROGUARD_ENABLED defined
+
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_FLAGS := $(LOCAL_JACK_FLAGS)
+
+jack_all_deps := $(java_sources) $(java_resource_sources) $(full_jack_lib_deps) \
+        $(jar_manifest_file) $(layers_file) $(RenderScript_file_stamp) $(proguard_flag_files) \
+        $(proto_java_sources_file_stamp) $(LOCAL_ADDITIONAL_DEPENDENCIES) $(LOCAL_JARJAR_RULES) \
+        $(LOCAL_MODULE_MAKEFILE) $(JACK_JAR) $(JACK_LAUNCHER_JAR)
+
+ifeq ($(LOCAL_IS_STATIC_JAVA_LIBRARY),true)
+$(full_classes_jack): $(jack_all_deps)
+	@echo Building with Jack: $@
+	$(java-to-jack)
+
+else #LOCAL_IS_STATIC_JAVA_LIBRARY
+$(built_dex_intermediate): PRIVATE_CLASSES_JACK := $(full_classes_jack)
+
+$(built_dex_intermediate): $(jack_all_deps)
+	@echo Building with Jack: $@
+	$(jack-java-to-dex)
+
+# $(full_classes_jack) is just by-product of $(built_dex_intermediate).
+# The dummy command was added because, without it, make misses the fact the $(built_dex) also
+# change $(full_classes_jack).
+$(full_classes_jack): $(built_dex_intermediate)
+	$(hide) touch $@
+
+endif #LOCAL_IS_STATIC_JAVA_LIBRARY
+
+$(noshrob_classes_jack): PRIVATE_JACK_INTERMEDIATES_DIR := $(intermediates.COMMON)/jack-noshrob-rsc
+ifeq ($(LOCAL_JACK_ENABLED),incremental)
+$(noshrob_classes_jack): PRIVATE_JACK_INCREMENTAL_DIR := $(intermediates.COMMON)/jack-noshrob-incremental
+else
+$(noshrob_classes_jack): PRIVATE_JACK_INCREMENTAL_DIR :=
+endif
+$(noshrob_classes_jack): PRIVATE_JACK_PROGUARD_FLAGS :=
+$(noshrob_classes_jack): $(jack_all_deps)
+	@echo Building with Jack: $@
+	$(java-to-jack)
+endif  # full_classes_jar is defined
+endif # LOCAL_JACK_ENABLED
diff --git a/core/java_library.mk b/core/java_library.mk
index b4e3eaa..5a2d19b 100644
--- a/core/java_library.mk
+++ b/core/java_library.mk
@@ -24,10 +24,20 @@
 
 LOCAL_BUILT_MODULE_STEM := javalib.jar
 
+#################################
+include $(BUILD_SYSTEM)/configure_local_jack.mk
+#################################
+
+ifdef LOCAL_JACK_ENABLED
+ifdef LOCAL_IS_STATIC_JAVA_LIBRARY
+LOCAL_BUILT_MODULE_STEM := classes.jack
+endif
+endif
+
 intermediates.COMMON := $(call local-intermediates-dir,COMMON)
 
 # This file will be the one that other modules should depend on.
-common_javalib.jar := $(intermediates.COMMON)/$(LOCAL_BUILT_MODULE_STEM)
+common_javalib.jar := $(intermediates.COMMON)/javalib.jar
 LOCAL_INTERMEDIATE_TARGETS += $(common_javalib.jar)
 
 ifeq ($(LOCAL_PROGUARD_ENABLED),disabled)
@@ -59,7 +69,11 @@
 	@echo "target Static Jar: $(PRIVATE_MODULE) ($@)"
 	$(copy-file-to-target)
 
-$(LOCAL_BUILT_MODULE): $(common_javalib.jar)
+ifdef LOCAL_JACK_ENABLED
+$(LOCAL_BUILT_MODULE) : $(full_classes_jack)
+else
+$(LOCAL_BUILT_MODULE) : $(common_javalib.jar)
+endif
 	$(copy-file-to-target)
 
 else # !LOCAL_IS_STATIC_JAVA_LIBRARY
@@ -69,8 +83,15 @@
 $(common_javalib.jar): PRIVATE_DONT_DELETE_JAR_DIRS := $(LOCAL_DONT_DELETE_JAR_DIRS)
 $(common_javalib.jar) : $(built_dex) $(java_resource_sources)
 	@echo "target Jar: $(PRIVATE_MODULE) ($@)"
+ifdef LOCAL_JACK_ENABLED
+	$(create-empty-package)
+else
 	$(call initialize-package-file,$(PRIVATE_SOURCE_ARCHIVE),$@)
+endif
 	$(add-dex-to-package)
+ifdef LOCAL_JACK_ENABLED
+	$(add-carried-jack-resources)
+endif
 
 ifdef LOCAL_DEX_PREOPT
 ifneq ($(dexpreopt_boot_jar_module),) # boot jar
diff --git a/core/main.mk b/core/main.mk
index 8ae3f5f..5b6e1e9 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -234,23 +234,7 @@
 # These are the modifier targets that don't do anything themselves, but
 # change the behavior of the build.
 # (must be defined before including definitions.make)
-INTERNAL_MODIFIER_TARGETS := showcommands all incrementaljavac
-
-.PHONY: incrementaljavac
-incrementaljavac: ;
-
-# WARNING:
-# ENABLE_INCREMENTALJAVAC should NOT be enabled by default, because change of
-# a Java source file won't trigger rebuild of its dependent Java files.
-# You can only enable it by adding "incrementaljavac" to your make command line.
-# You are responsible for the correctness of the incremental build.
-# This may decrease incremental build time dramatically for large Java libraries,
-# such as core.jar, framework.jar, etc.
-ENABLE_INCREMENTALJAVAC :=
-ifneq (,$(filter incrementaljavac, $(MAKECMDGOALS)))
-ENABLE_INCREMENTALJAVAC := true
-MAKECMDGOALS := $(filter-out incrementaljavac, $(MAKECMDGOALS))
-endif
+INTERNAL_MODIFIER_TARGETS := showcommands all
 
 # EMMA_INSTRUMENT_STATIC merges the static emma library to each emma-enabled module.
 ifeq (true,$(EMMA_INSTRUMENT_STATIC))
@@ -751,9 +735,14 @@
 #$(error filtered out
 #           $(filter-out $(modules_to_install),$(old_modules_to_install)))
 
-# Don't include any GNU targets in the SDK.  It's ok (and necessary)
-# to build the host tools, but nothing that's going to be installed
-# on the target (including static libraries).
+# Don't include any GNU General Public License shared objects or static
+# libraries in SDK images.  GPL executables (not static/dynamic libraries)
+# are okay if they don't link against any closed source libraries (directly
+# or indirectly)
+
+# It's ok (and necessary) to build the host tools, but nothing that's
+# going to be installed on the target (including static libraries).
+
 ifdef is_sdk_build
   target_gnu_MODULES := \
               $(filter \
@@ -761,6 +750,7 @@
                       $(TARGET_OUT)/% \
                       $(TARGET_OUT_DATA)/%, \
                               $(sort $(call get-tagged-modules,gnu)))
+  target_gnu_MODULES := $(filter-out $(TARGET_OUT_EXECUTABLES)/%,$(target_gnu_MODULES))
   $(info Removing from sdk:)$(foreach d,$(target_gnu_MODULES),$(info : $(d)))
   modules_to_install := \
               $(filter-out $(target_gnu_MODULES),$(modules_to_install))
@@ -914,7 +904,9 @@
   # For uninstallable modules such as static Java library, we have to dist the built file,
   # as <module_name>.<suffix>
   apps_only_dist_built_files := $(foreach m,$(unbundled_build_modules),$(if $(ALL_MODULES.$(m).INSTALLED),,\
-      $(if $(ALL_MODULES.$(m).BUILT),$(ALL_MODULES.$(m).BUILT):$(m)$(suffix $(ALL_MODULES.$(m).BUILT)))))
+      $(if $(ALL_MODULES.$(m).BUILT),$(ALL_MODULES.$(m).BUILT):$(m)$(suffix $(ALL_MODULES.$(m).BUILT)))\
+      $(if $(ALL_MODULES.$(m).AAR),$(ALL_MODULES.$(m).AAR):$(m).aar)\
+      ))
   $(call dist-for-goals,apps_only, $(apps_only_dist_built_files))
 
   ifeq ($(EMMA_INSTRUMENT),true)
diff --git a/core/notice_files.mk b/core/notice_files.mk
index e63cd84..43a5435 100644
--- a/core/notice_files.mk
+++ b/core/notice_files.mk
@@ -43,7 +43,7 @@
       # javalib.jar is the default name for the build module (and isn't meaningful)
       # If that's what we have, substitute the module name instead.  These files
       # aren't included on the device, so this name is synthetic anyway.
-      ifeq ($(module_leaf),javalib.jar)
+      ifneq ($(filter javalib.jar classes.jack,$(module_leaf)),)
         module_leaf := $(LOCAL_MODULE).jar
       endif
       module_installed_filename := \
diff --git a/core/package_internal.mk b/core/package_internal.mk
index d52997b..23648c1 100644
--- a/core/package_internal.mk
+++ b/core/package_internal.mk
@@ -57,6 +57,10 @@
 endif
 LOCAL_MODULE_CLASS := APPS
 
+#################################
+include $(BUILD_SYSTEM)/configure_local_jack.mk
+#################################
+
 # Package LOCAL_MODULE_TAGS default to optional
 LOCAL_MODULE_TAGS := $(strip $(LOCAL_MODULE_TAGS))
 ifeq ($(LOCAL_MODULE_TAGS),)
@@ -162,6 +166,13 @@
 endif # !custom
 LOCAL_PROGUARD_FLAGS := $(addprefix -include ,$(proguard_options_file)) $(LOCAL_PROGUARD_FLAGS)
 
+ifdef LOCAL_JACK_ENABLED
+ifndef LOCAL_JACK_PROGUARD_FLAGS
+    LOCAL_JACK_PROGUARD_FLAGS := $(LOCAL_PROGUARD_FLAGS)
+endif
+LOCAL_JACK_PROGUARD_FLAGS := $(addprefix -include ,$(proguard_options_file)) $(LOCAL_JACK_PROGUARD_FLAGS)
+endif # LOCAL_JACK_ENABLED
+
 ifeq (true,$(EMMA_INSTRUMENT))
 ifndef LOCAL_EMMA_INSTRUMENT
 # No emma for test apks.
@@ -271,6 +282,18 @@
 # they want to use this module's R.java file.
 $(LOCAL_BUILT_MODULE): $(R_file_stamp)
 
+ifdef LOCAL_JACK_ENABLED
+ifneq ($(built_dex_intermediate),)
+$(built_dex_intermediate): $(R_file_stamp)
+endif
+ifneq ($(noshrob_classes_jack),)
+$(noshrob_classes_jack): $(R_file_stamp)
+endif
+ifneq ($(full_classes_jack),)
+$(full_classes_jack): $(R_file_stamp)
+endif
+endif # LOCAL_JACK_ENABLED
+
 ifneq ($(full_classes_jar),)
 # If full_classes_jar is non-empty, we're building sources.
 # If we're building sources, the initial javac step (which
@@ -369,7 +392,6 @@
 $(LOCAL_BUILT_MODULE): PRIVATE_JNI_SHARED_LIBRARIES := $(jni_shared_libraries_with_abis)
 # PRIVATE_JNI_SHARED_LIBRARIES_ABI is a list of ABI names.
 $(LOCAL_BUILT_MODULE): PRIVATE_JNI_SHARED_LIBRARIES_ABI := $(jni_shared_libraries_abis)
-$(LOCAL_BUILT_MODULE): PRIVATE_PAGE_ALIGN_JNI_SHARED_LIBRARIES := $(LOCAL_PAGE_ALIGN_JNI_SHARED_LIBRARIES)
 ifneq ($(TARGET_BUILD_APPS),)
     # Include all resources for unbundled apps.
     LOCAL_AAPT_INCLUDE_ALL_RESOURCES := true
@@ -388,9 +410,13 @@
 $(LOCAL_BUILT_MODULE): PRIVATE_DONT_DELETE_JAR_DIRS := $(LOCAL_DONT_DELETE_JAR_DIRS)
 $(LOCAL_BUILT_MODULE): $(all_res_assets) $(jni_shared_libraries) $(full_android_manifest)
 	@echo "target Package: $(PRIVATE_MODULE) ($@)"
+ifdef LOCAL_JACK_ENABLED
+	$(create-empty-package)
+else
 	$(if $(PRIVATE_SOURCE_ARCHIVE),\
 	  $(call initialize-package-file,$(PRIVATE_SOURCE_ARCHIVE),$@),\
 	  $(create-empty-package))
+endif
 	$(add-assets-to-package)
 ifneq ($(jni_shared_libraries),)
 	$(add-jni-shared-libs-to-package)
@@ -401,6 +427,9 @@
 else
 	$(add-dex-to-package)
 endif
+ifdef LOCAL_JACK_ENABLED
+	$(add-carried-jack-resources)
+endif
 ifdef LOCAL_DEX_PREOPT
 ifneq (nostripping,$(LOCAL_DEX_PREOPT))
 	$(call dexpreopt-remove-classes.dex,$@)
diff --git a/core/pathmap.mk b/core/pathmap.mk
index 2914576..b300ff5 100644
--- a/core/pathmap.mk
+++ b/core/pathmap.mk
@@ -43,6 +43,7 @@
     opengl-tests-includes:frameworks/native/opengl/tests/include \
     recovery:bootable/recovery \
     system-core:system/core/include \
+    audio:system/media/audio/include \
     audio-effects:system/media/audio_effects/include \
     audio-utils:system/media/audio_utils/include \
     audio-route:system/media/audio_route/include \
@@ -107,7 +108,6 @@
         annotations \
         v4 \
         v7/gridlayout \
-        v7/appcompat \
         v7/cardview \
         v7/mediarouter \
         v7/palette \
@@ -115,7 +115,12 @@
         v13 \
         v17/leanback \
         design \
-        percent
+        percent \
+        recommendation \
+        v7/preference \
+        v14/preference \
+        v17/preference-leanback \
+        customtabs
 
 #
 # A list of all source roots under frameworks/multidex.
@@ -131,6 +136,7 @@
 FRAMEWORKS_SUPPORT_JAVA_SRC_DIRS := \
 	$(addprefix frameworks/support/,$(FRAMEWORKS_SUPPORT_SUBDIRS)) \
 	$(addprefix frameworks/,$(FRAMEWORKS_MULTIDEX_SUBDIRS)) \
+	frameworks/support/v7/appcompat/src \
 	frameworks/support/v7/recyclerview/src
 
 #
@@ -138,7 +144,23 @@
 #
 FRAMEWORKS_SUPPORT_JAVA_LIBRARIES := \
     $(foreach dir,$(FRAMEWORKS_SUPPORT_SUBDIRS),android-support-$(subst /,-,$(dir))) \
+    android-support-v7-appcompat \
     android-support-v7-recyclerview \
     android-support-multidex \
     android-support-multidex-instrumentation
 
+#
+# A list of all documented source roots under frameworks/data-binding.
+#
+FRAMEWORKS_DATA_BINDING_SUBDIRS := \
+        baseLibrary/src/main \
+        library/src/main \
+        library/src/doc
+
+#
+# A version of FRAMEWORKS_DATA_BINDING_SUBDIRS that is expanded to full paths from
+# the root of the tree.
+#
+FRAMEWORKS_DATA_BINDING_JAVA_SRC_DIRS := \
+	$(addprefix frameworks/data-binding/,$(FRAMEWORKS_DATA_BINDING_SUBDIRS))
+
diff --git a/core/pdk_config.mk b/core/pdk_config.mk
index 838754f..262b50e 100644
--- a/core/pdk_config.mk
+++ b/core/pdk_config.mk
@@ -52,18 +52,20 @@
 # For these dirs, add classes.jar and javalib.jar from the dir to platform.zip
 # all paths under out dir
 PDK_PLATFORM_JAVA_ZIP_JAVA_TARGET_LIB_DIR += \
-	target/common/obj/JAVA_LIBRARIES/android_stubs_current_intermediates \
-	target/common/obj/JAVA_LIBRARIES/core-libart_intermediates \
-	target/common/obj/JAVA_LIBRARIES/core-junit_intermediates \
-	target/common/obj/JAVA_LIBRARIES/ext_intermediates \
-	target/common/obj/JAVA_LIBRARIES/framework_intermediates \
-	target/common/obj/JAVA_LIBRARIES/android.test.runner_intermediates \
-	target/common/obj/JAVA_LIBRARIES/telephony-common_intermediates \
-	target/common/obj/JAVA_LIBRARIES/voip-common_intermediates \
-	target/common/obj/JAVA_LIBRARIES/ims-common_intermediates \
-	target/common/obj/JAVA_LIBRARIES/mms-common_intermediates \
-	target/common/obj/JAVA_LIBRARIES/android-ex-camera2_intermediates \
-	target/common/obj/JAVA_LIBRARIES/android-common_intermediates \
+  target/common/obj/JAVA_LIBRARIES/android.test.runner_intermediates \
+  target/common/obj/JAVA_LIBRARIES/android-common_intermediates \
+  target/common/obj/JAVA_LIBRARIES/android-ex-camera2_intermediates \
+  target/common/obj/JAVA_LIBRARIES/android_stubs_current_intermediates \
+  target/common/obj/JAVA_LIBRARIES/bouncycastle_intermediates \
+  target/common/obj/JAVA_LIBRARIES/conscrypt_intermediates \
+  target/common/obj/JAVA_LIBRARIES/core-libart_intermediates \
+  target/common/obj/JAVA_LIBRARIES/core-junit_intermediates \
+  target/common/obj/JAVA_LIBRARIES/ext_intermediates \
+  target/common/obj/JAVA_LIBRARIES/framework_intermediates \
+  target/common/obj/JAVA_LIBRARIES/ims-common_intermediates \
+  target/common/obj/JAVA_LIBRARIES/okhttp_intermediates \
+  target/common/obj/JAVA_LIBRARIES/telephony-common_intermediates \
+  target/common/obj/JAVA_LIBRARIES/voip-common_intermediates \
 
 # not java libraries
 PDK_PLATFORM_JAVA_ZIP_CONTENTS += \
@@ -76,7 +78,7 @@
 	$(PDK_PLATFORM_JAVA_ZIP_JAVA_HOST_LIB_DIR)
 
 PDK_PLATFORM_JAVA_ZIP_CONTENTS += $(foreach lib_dir,$(PDK_PLATFORM_JAVA_ZIP_JAVA_LIB_DIR),\
-    $(lib_dir)/classes.jar $(lib_dir)/javalib.jar)
+    $(lib_dir)/classes.jack $(lib_dir)/classes.jar $(lib_dir)/javalib.jar)
 
 # check and override java support level
 ifneq ($(TARGET_BUILD_PDK)$(PDK_FUSION_PLATFORM_ZIP),)
diff --git a/core/prebuilt_internal.mk b/core/prebuilt_internal.mk
index f85b0b8..0406353 100644
--- a/core/prebuilt_internal.mk
+++ b/core/prebuilt_internal.mk
@@ -122,7 +122,7 @@
 endif
 endif
 
-# We need to enclose the above export_includes and built_shared_libraries in
+# We need to enclose the above export_includes and my_built_shared_libraries in
 # "LOCAL_STRIP_MODULE not true" because otherwise the rules are defined in dynamic_binary.mk.
 endif  # LOCAL_STRIP_MODULE not true
 
@@ -195,14 +195,25 @@
 include $(BUILD_SYSTEM)/dex_preopt_odex_install.mk
 #######################################
 # Sign and align non-presigned .apks.
-$(built_module) : PRIVATE_PAGE_ALIGN_JNI_SHARED_LIBRARIES := $(LOCAL_PAGE_ALIGN_JNI_SHARED_LIBRARIES)
+
+# The embedded prebuilt jni to uncompress.
+ifeq ($(LOCAL_CERTIFICATE),PRESIGNED)
+# For PRESIGNED apks we must uncompress every .so file:
+# even if the .so file isn't for the current TARGET_ARCH,
+# we can't strip the file.
+embedded_prebuilt_jni_libs := 'lib/*.so'
+endif
+ifndef embedded_prebuilt_jni_libs
+# No LOCAL_PREBUILT_JNI_LIBS, uncompress all.
+embedded_prebuilt_jni_libs := 'lib/*.so'
+endif
+$(built_module): PRIVATE_EMBEDDED_JNI_LIBS := $(embedded_prebuilt_jni_libs)
+
 $(built_module) : $(my_prebuilt_src_file) | $(ACP) $(ZIPALIGN) $(SIGNAPK_JAR)
 	$(transform-prebuilt-to-target)
+	$(uncompress-shared-libs)
 ifneq ($(LOCAL_CERTIFICATE),PRESIGNED)
 	@# Only strip out files if we can re-sign the package.
-ifdef extracted_jni_libs
-	$(hide) zip -d $@ 'lib/*.so'  # strip embedded JNI libraries.
-endif
 ifdef LOCAL_DEX_PREOPT
 ifneq (nostripping,$(LOCAL_DEX_PREOPT))
 	$(call dexpreopt-remove-classes.dex,$@)
@@ -210,9 +221,6 @@
 endif
 	$(sign-package)
 endif
-ifeq ($(LOCAL_PAGE_ALIGN_JNI_SHARED_LIBRARIES),true)
-	$(uncompress-shared-libs)
-endif
 	$(align-package)
 
 ###############################
@@ -302,6 +310,14 @@
 $(built_module) : $(common_javalib_jar)
 endif # TARGET JAVA_LIBRARIES
 
+ifeq ($(LOCAL_MODULE_CLASS),JAVA_LIBRARIES)
+$(intermediates.COMMON)/classes.jack : PRIVATE_JILL_FLAGS:=$(LOCAL_JILL_FLAGS)
+$(intermediates.COMMON)/classes.jack : $(my_src_jar) $(LOCAL_MODULE_MAKEFILE) \
+        $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JILL_JAR) $(JACK_JAR) $(JACK_LAUNCHER_JAR)
+	$(transform-jar-to-jack)
+
+endif # JAVA_LIBRARIES
+
 $(built_module) : $(LOCAL_MODULE_MAKEFILE) $(LOCAL_ADDITIONAL_DEPENDENCIES)
 
 my_prebuilt_src_file :=
diff --git a/core/product.mk b/core/product.mk
index 46fad89..4e8bff1 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -97,10 +97,13 @@
     PRODUCT_RESTRICT_VENDOR_FILES \
     PRODUCT_VENDOR_KERNEL_HEADERS \
     PRODUCT_BOOT_JARS \
+    PRODUCT_SUPPORTS_BOOT_SIGNER \
+    PRODUCT_SUPPORTS_VBOOT \
     PRODUCT_SUPPORTS_VERITY \
     PRODUCT_OEM_PROPERTIES \
     PRODUCT_SYSTEM_PROPERTY_BLACKLIST \
     PRODUCT_SYSTEM_SERVER_JARS \
+    PRODUCT_VBOOT_SIGNING_KEY \
     PRODUCT_VERITY_SIGNING_KEY \
     PRODUCT_SYSTEM_VERITY_PARTITION \
     PRODUCT_VENDOR_VERITY_PARTITION \
diff --git a/core/proguard_basic_keeps.flags b/core/proguard_basic_keeps.flags
index 4a85db0..4de5221 100644
--- a/core/proguard_basic_keeps.flags
+++ b/core/proguard_basic_keeps.flags
@@ -40,6 +40,11 @@
     java.lang.Object readResolve();
 }
 
+# Keep Throwable's constructor that takes a String argument.
+-keepclassmembers class * extends java.lang.Throwable {
+  <init>(java.lang.String);
+}
+
 # Please specify classes to be kept explicitly in your package's configuration.
 # -keep class * extends android.app.Activity
 # -keep class * extends android.view.View
@@ -58,7 +63,12 @@
 # Don't warn about those in case this app is linking against an older
 # platform version.  We know about them, and they are safe.
 # See proguard-android.txt in the SDK package.
--dontwarn android.support.**
+#
+# DO NOT USE THIS: We figured it's dangerous to blindly ignore all support library warnings.
+# ProGuard may strip members of subclass of unknown super classes, in case an app is linking against
+# LOCAL_SDK_VERSION lower than the support library's LOCAL_SDK_VERSION.
+# See bug/20658265.
+# -dontwarn android.support.**
 
 # Less spammy.
 -dontnote
diff --git a/core/shared_library_internal.mk b/core/shared_library_internal.mk
index 2487fbb0..e21cf5d 100644
--- a/core/shared_library_internal.mk
+++ b/core/shared_library_internal.mk
@@ -42,7 +42,11 @@
 my_target_global_ld_dirs := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_LD_DIRS)
 my_target_libprofile_rt := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBPROFILE_RT)
 my_target_libgcov := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBGCOV)
+ifeq ($(LOCAL_NO_LIBGCC),true)
+my_target_libgcc :=
+else
 my_target_libgcc := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBGCC)
+endif
 my_target_libatomic := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBATOMIC)
 my_target_crtbegin_so_o := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_CRTBEGIN_SO_O)
 my_target_crtend_so_o := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_CRTEND_SO_O)
diff --git a/core/static_java_library.mk b/core/static_java_library.mk
index 02078e0..9b7b46a 100644
--- a/core/static_java_library.mk
+++ b/core/static_java_library.mk
@@ -56,8 +56,20 @@
 ifneq ($(LOCAL_PROGUARD_ENABLED),custom)
   proguard_options_file := $(intermediates.COMMON)/proguard_options
 endif
+
 LOCAL_PROGUARD_FLAGS := $(addprefix -include ,$(proguard_options_file)) $(LOCAL_PROGUARD_FLAGS)
 
+#################################
+include $(BUILD_SYSTEM)/configure_local_jack.mk
+#################################
+
+ifdef LOCAL_JACK_ENABLED
+ifndef LOCAL_JACK_PROGUARD_FLAGS
+    LOCAL_JACK_PROGUARD_FLAGS := $(LOCAL_PROGUARD_FLAGS)
+endif
+LOCAL_JACK_PROGUARD_FLAGS := $(addprefix -include ,$(proguard_options_file)) $(LOCAL_JACK_PROGUARD_FLAGS)
+endif # LOCAL_JACK_ENABLED
+
 endif  # LOCAL_RESOURCE_DIR
 
 all_res_assets := $(all_resources)
@@ -92,7 +104,8 @@
 
 $(R_file_stamp): PRIVATE_MODULE := $(LOCAL_MODULE)
 # add --non-constant-id to prevent inlining constants.
-$(R_file_stamp): PRIVATE_AAPT_FLAGS := $(LOCAL_AAPT_FLAGS) --non-constant-id
+# AAR needs text symbol file R.txt.
+$(R_file_stamp): PRIVATE_AAPT_FLAGS := $(LOCAL_AAPT_FLAGS) --non-constant-id --output-text-symbols $(LOCAL_INTERMEDIATE_SOURCE_DIR)
 $(R_file_stamp): PRIVATE_SOURCE_INTERMEDIATES_DIR := $(LOCAL_INTERMEDIATE_SOURCE_DIR)
 $(R_file_stamp): PRIVATE_ANDROID_MANIFEST := $(full_android_manifest)
 $(R_file_stamp): PRIVATE_RESOURCE_PUBLICS_OUTPUT := $(intermediates.COMMON)/public_resources.xml
@@ -114,9 +127,32 @@
 	$(hide) find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) -name R.java | xargs cat > $@
 
 $(LOCAL_BUILT_MODULE): $(R_file_stamp)
-ifneq ($(full_classes_jar),)
+ifdef LOCAL_JACK_ENABLED
+$(noshrob_classes_jack): $(R_file_stamp)
+$(full_classes_jack): $(R_file_stamp)
+endif # LOCAL_JACK_ENABLED
 $(full_classes_compiled_jar): $(R_file_stamp)
-endif
+
+# Rule to build AAR, archive including classes.jar, resource, etc.
+built_aar := $(intermediates.COMMON)/javalib.aar
+$(built_aar): PRIVATE_MODULE := $(LOCAL_MODULE)
+$(built_aar): PRIVATE_ANDROID_MANIFEST := $(full_android_manifest)
+$(built_aar): PRIVATE_CLASSES_JAR := $(LOCAL_BUILT_MODULE)
+$(built_aar): PRIVATE_RESOURCE_DIR := $(LOCAL_RESOURCE_DIR)
+$(built_aar): PRIVATE_R_TXT := $(LOCAL_INTERMEDIATE_SOURCE_DIR)/R.txt
+$(built_aar) : $(LOCAL_BUILT_MODULE)
+	@echo "target AAR:  $(PRIVATE_MODULE) ($@)"
+	$(hide) rm -rf $(dir $@)aar && mkdir -p $(dir $@)aar/res
+	$(hide) cp $(PRIVATE_ANDROID_MANIFEST) $(dir $@)aar/AndroidManifest.xml
+	$(hide) cp $(PRIVATE_CLASSES_JAR) $(dir $@)aar/classes.jar
+	# Note: Use "cp -n" to honor the resource overlay rules, if multiple res dirs exist.
+	$(hide) $(foreach res,$(PRIVATE_RESOURCE_DIR),cp -Rfn $(res)/* $(dir $@)aar/res;)
+	$(hide) cp $(PRIVATE_R_TXT) $(dir $@)aar/R.txt
+	$(hide) jar -cMf $@ \
+	  -C $(dir $@)aar .
+
+# Register the aar file.
+ALL_MODULES.$(LOCAL_MODULE).AAR := $(built_aar)
 
 endif  # need_compile_res
 
diff --git a/core/tasks/cts.mk b/core/tasks/cts.mk
index 23648f8..56a7f6f 100644
--- a/core/tasks/cts.mk
+++ b/core/tasks/cts.mk
@@ -21,7 +21,7 @@
 HOSTTESTLIB_JAR := $(HOST_OUT_JAVA_LIBRARIES)/hosttestlib.jar
 TF_JAR := $(HOST_OUT_JAVA_LIBRARIES)/tradefed-prebuilt.jar
 CTS_TF_JAR := $(HOST_OUT_JAVA_LIBRARIES)/cts-tradefed.jar
-CTS_TF_EXEC_PATH := $(HOST_OUT_EXECUTABLES)/cts-tradefed
+CTS_TF_EXEC_PATH ?= $(HOST_OUT_EXECUTABLES)/cts-tradefed
 CTS_TF_README_PATH := $(cts_tools_src_dir)/tradefed-host/README
 
 VMTESTSTF_INTERMEDIATES :=$(call intermediates-dir-for,JAVA_LIBRARIES,vm-tests-tf,HOST)
@@ -64,8 +64,8 @@
 
 
 CTS_TEST_JAR_LIST := \
-        cts-junit \
-        CtsJdwp
+	cts-junit \
+	CtsJdwp
 
 # Depend on the full package paths rather than the phony targets to avoid
 # rebuilding the packages every time.
@@ -73,24 +73,30 @@
 CTS_TEST_JAR_FILES := $(foreach c,$(CTS_TEST_JAR_LIST),$(call intermediates-dir-for,JAVA_LIBRARIES,$(c))/javalib.jar)
 
 -include cts/CtsTestCaseList.mk
-CTS_CASE_LIST := $(CTS_CORE_CASE_LIST) $(CTS_TEST_CASE_LIST)
 
 # A module may have mutliple installed files (e.g. split apks)
 CTS_CASE_LIST_APKS :=
-CTS_CASE_LIST_APKS_DIR := $(cts_dir)/$(cts_name)/repository/testcases/
-$(foreach m, $(CTS_CASE_LIST),\
+$(foreach m, $(CTS_TEST_CASE_LIST),\
+  $(foreach fp, $(ALL_MODULES.$(m).BUILT_INSTALLED),\
+    $(eval pair := $(subst :,$(space),$(fp)))\
+    $(eval CTS_CASE_LIST_APKS += $(CTS_TESTCASES_OUT)/$(notdir $(word 2,$(pair))))))\
+$(foreach m, $(CTS_CORE_CASE_LIST),\
   $(foreach fp, $(ALL_MODULES.$(m).BUILT_INSTALLED),\
     $(eval pair := $(subst :,$(space),$(fp)))\
     $(eval built := $(word 1,$(pair)))\
-    $(eval installed := $(CTS_CASE_LIST_APKS_DIR)/$(notdir $(word 2,$(pair))))\
+    $(eval installed := $(CTS_TESTCASES_OUT)/$(notdir $(word 2,$(pair))))\
     $(eval $(call copy-one-file, $(built), $(installed)))\
     $(eval CTS_CASE_LIST_APKS += $(installed))))
 
-CTS_SHARED_LIBS := \
-	$(HOST_LIBRARY_PATH)/libc++$(HOST_SHLIB_SUFFIX)
+CTS_CASE_LIST_JARS :=
+$(foreach m, $(CTS_TEST_JAR_LIST),\
+  $(eval CTS_CASE_LIST_JARS += $(CTS_TESTCASES_OUT)/$(m).jar))
+
+CTS_SHARED_LIBS :=
 
 DEFAULT_TEST_PLAN := $(cts_dir)/$(cts_name)/resource/plans
-$(cts_dir)/all_cts_files_stamp: $(CTS_CORE_CASES) $(CTS_TEST_CASES) $(CTS_CASE_LIST_APKS) $(JUNIT_HOST_JAR) $(HOSTTESTLIB_JAR) $(CTS_HOST_LIBRARY_JARS) $(TF_JAR) $(VMTESTSTF_JAR) $(CTS_TF_JAR) $(CTS_TF_EXEC_PATH) $(CTS_TF_README_PATH) $(ACP) $(CTS_TEST_JAR_FILES) $(CTS_SHARED_LIBS)
+$(cts_dir)/all_cts_files_stamp: $(CTS_CORE_CASES) $(CTS_TEST_JAR_FILES) $(CTS_TEST_CASES) $(CTS_CASE_LIST_APKS) $(CTS_CASE_LIST_JARS) $(JUNIT_HOST_JAR) $(HOSTTESTLIB_JAR) $(CTS_HOST_LIBRARY_JARS) $(TF_JAR) $(VMTESTSTF_JAR) $(CTS_TF_JAR) $(CTS_TF_EXEC_PATH) $(CTS_TF_README_PATH) $(ADDITIONAL_TF_JARS) $(ACP) $(CTS_SHARED_LIBS)
+
 # Make necessary directory for CTS
 	$(hide) mkdir -p $(TMP_DIR)
 	$(hide) mkdir -p $(PRIVATE_DIR)/docs
@@ -98,12 +104,9 @@
 	$(hide) mkdir -p $(PRIVATE_DIR)/repository/testcases
 	$(hide) mkdir -p $(PRIVATE_DIR)/repository/plans
 # Copy executable and JARs to CTS directory
-	$(hide) $(ACP) -fp $(VMTESTSTF_JAR) $(PRIVATE_DIR)/repository/testcases
-	$(hide) $(ACP) -fp $(HOSTTESTLIB_JAR) $(CTS_HOST_LIBRARY_JARS) $(TF_JAR) $(CTS_TF_JAR) $(CTS_TF_EXEC_PATH) $(CTS_TF_README_PATH) $(PRIVATE_DIR)/tools
+	$(hide) $(ACP) -fp $(VMTESTSTF_JAR) $(CTS_TESTCASES_OUT)
+	$(hide) $(ACP) -fp $(HOSTTESTLIB_JAR) $(CTS_HOST_LIBRARY_JARS) $(TF_JAR) $(CTS_TF_JAR) $(CTS_TF_EXEC_PATH) $(ADDITIONAL_TF_JARS) $(CTS_TF_README_PATH) $(PRIVATE_DIR)/tools
 	$(hide) $(call copy-files-with-structure, $(CTS_SHARED_LIBS),$(HOST_OUT)/,$(PRIVATE_DIR))
-# Change mode of the executables
-	$(foreach jar,$(CTS_TEST_JAR_LIST),$(call copy-testcase-jar,$(jar)))
-	$(foreach testcase,$(CTS_TEST_CASES),$(call copy-testcase,$(testcase)))
 	$(hide) touch $@
 
 # Generate the test descriptions for the core-tests
@@ -213,7 +216,16 @@
 	$(hide) mkdir -p $(CTS_TESTCASES_OUT)
 	$(call generate-core-test-description,$(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.org,\
 		cts/tests/core/libcore/org/AndroidManifest.xml,\
-		$(CORETESTS_INTERMEDIATES)/javalib.jar,org,\
+		$(CORETESTS_INTERMEDIATES)/javalib.jar,\
+		org.w3c.domts:\
+		org.apache.harmony.security.tests:\
+		org.apache.harmony.nio.tests:\
+		org.apache.harmony.crypto.tests:\
+		org.apache.harmony.regex.tests:\
+		org.apache.harmony.luni.tests:\
+		org.apache.harmony.tests.internal.net.www.protocol:\
+		org.apache.harmony.tests.javax.net:\
+		org.json,\
 		$(TARGET_ARCH),libcore/expectations)
 
 $(CTS_TESTCASES_OUT)/android.core.tests.libcore.package.libcore.xml: $(CTS_CORE_XMLS_DEPS)
@@ -359,8 +371,7 @@
 # Generate the default test plan for User.
 # Usage: buildCts.py <testRoot> <ctsOutputDir> <tempDir> <androidRootDir> <docletPath>
 
-$(DEFAULT_TEST_PLAN): $(cts_dir)/all_cts_files_stamp $(cts_tools_src_dir)/utils/buildCts.py $(HOST_OUT_JAVA_LIBRARIES)/descGen.jar $(CTS_CORE_XMLS) $(CTS_TEST_XMLS) $(CORE_VM_TEST_TF_DESC) | $(ACP)
-	$(hide) $(ACP) -fp $(CTS_CORE_XMLS) $(CTS_TEST_XMLS) $(CORE_VM_TEST_TF_DESC) $(PRIVATE_DIR)/repository/testcases
+$(DEFAULT_TEST_PLAN): $(cts_dir)/all_cts_files_stamp $(cts_tools_src_dir)/utils/buildCts.py $(HOST_OUT_JAVA_LIBRARIES)/descGen.jar $(CTS_CORE_XMLS) $(CTS_TEST_XMLS) $(CORE_VM_TEST_TF_DESC)
 	$(hide) $(cts_tools_src_dir)/utils/buildCts.py cts/tests/tests/ $(PRIVATE_DIR) $(TMP_DIR) \
 		$(TOP) $(HOST_OUT_JAVA_LIBRARIES)/descGen.jar
 	$(hide) mkdir -p $(dir $@) && touch $@
@@ -382,16 +393,3 @@
 cts: $(INTERNAL_CTS_TARGET) adb
 $(call dist-for-goals,cts,$(INTERNAL_CTS_TARGET))
 
-
-define copy-testcase
-
-$(hide) $(ACP) -fp $(1) $(PRIVATE_DIR)/repository/testcases/$(notdir $1)
-
-endef
-
-define copy-testcase-jar
-
-$(hide) $(ACP) -fp $(call intermediates-dir-for,JAVA_LIBRARIES,$(1))/javalib.jar \
-	$(PRIVATE_DIR)/repository/testcases/$(1).jar
-
-endef
diff --git a/core/tasks/oem_image.mk b/core/tasks/oem_image.mk
index 26b9aba..32d56a7 100644
--- a/core/tasks/oem_image.mk
+++ b/core/tasks/oem_image.mk
@@ -36,7 +36,7 @@
 	$(call generate-userimage-prop-dictionary, $(oemimage_intermediates)/oem_image_info.txt, skip_fsck=true)
 	$(hide) PATH=$(foreach p,$(INTERNAL_USERIMAGES_BINARY_PATHS),$(p):)$$PATH \
 	  ./build/tools/releasetools/build_image.py \
-	  $(TARGET_OUT_OEM) $(oemimage_intermediates)/oem_image_info.txt $@
+	  $(TARGET_OUT_OEM) $(oemimage_intermediates)/oem_image_info.txt $@ $(TARGET_OUT)
 	$(hide) $(call assert-max-image-size,$@,$(BOARD_OEMIMAGE_PARTITION_SIZE))
 
 .PHONY: oem_image
diff --git a/core/tasks/tools/build_custom_image.mk b/core/tasks/tools/build_custom_image.mk
index e59ed42..ec491fa 100644
--- a/core/tasks/tools/build_custom_image.mk
+++ b/core/tasks/tools/build_custom_image.mk
@@ -100,9 +100,11 @@
 	  $(hide) echo "# Properties from $(PRIVATE_DICT_FILE)" >> $(PRIVATE_INTERMEDIATES)/image_info.txt;\
 	    cat $(PRIVATE_DICT_FILE) >> $(PRIVATE_INTERMEDIATES)/image_info.txt)
 	# Generate the image.
+	$(if $(filter oem,$(PRIVATE_MOUNT_POINT)), \
+	  $(hide) echo "oem.buildnumber=$(BUILD_NUMBER)" >> $(PRIVATE_STAGING_DIR)/oem.prop)
 	$(hide) PATH=$(foreach p,$(INTERNAL_USERIMAGES_BINARY_PATHS),$(p):)$$PATH \
 	  ./build/tools/releasetools/build_image.py \
-	  $(PRIVATE_STAGING_DIR) $(PRIVATE_INTERMEDIATES)/image_info.txt $@
+	  $(PRIVATE_STAGING_DIR) $(PRIVATE_INTERMEDIATES)/image_info.txt $@ $(TARGET_OUT)
 
 my_installed_custom_image := $(PRODUCT_OUT)/$(notdir $(my_built_custom_image))
 $(my_installed_custom_image) : $(my_built_custom_image)
diff --git a/core/tasks/tools/package-modules.mk b/core/tasks/tools/package-modules.mk
index bd9cf57..a70e644 100644
--- a/core/tasks/tools/package-modules.mk
+++ b/core/tasks/tools/package-modules.mk
@@ -41,7 +41,7 @@
 $(hide) $(foreach p, $(1),\
   $(eval pair := $(subst :,$(space),$(p)))\
   mkdir -p $(dir $(word 2,$(pair)));\
-  cp -rf $(word 1,$(pair)) $(word 2,$(pair));)
+  cp -Rf $(word 1,$(pair)) $(word 2,$(pair));)
 endef
 
 my_package_zip := $(my_staging_dir)/$(my_package_name).zip
@@ -58,5 +58,5 @@
 	$(call copy-tests-in-batch,$(wordlist 1001,1200,$(PRIVATE_COPY_PAIRS)))
 	$(call copy-tests-in-batch,$(wordlist 1201,9999,$(PRIVATE_COPY_PAIRS)))
 	$(hide) $(foreach f, $(PRIVATE_PICKUP_FILES),\
-	  cp -rf $(f) $(dir $@);)
+	  cp -RfL $(f) $(dir $@);)
 	$(hide) cd $(dir $@) && zip -rq $(notdir $@) *
diff --git a/core/tasks/vendor_module_check.mk b/core/tasks/vendor_module_check.mk
index d8e8ec7..910c8b7 100644
--- a/core/tasks/vendor_module_check.mk
+++ b/core/tasks/vendor_module_check.mk
@@ -22,8 +22,10 @@
         broadcom \
         csr \
         elan \
+        fpc \
         google \
         htc \
+        huawei \
         imgtec \
         invensense \
         intel \
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index af72555..a278e86 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -42,7 +42,7 @@
   # which is the version that we reveal to the end user.
   # Update this value when the platform version changes (rather
   # than overriding it somewhere else).  Can be an arbitrary string.
-  PLATFORM_VERSION := 5.1.1
+  PLATFORM_VERSION := 6.0
 endif
 
 ifeq "" "$(PLATFORM_SDK_VERSION)"
@@ -54,7 +54,7 @@
   # intermediate builds).  During development, this number remains at the
   # SDK version the branch is based on and PLATFORM_VERSION_CODENAME holds
   # the code-name of the new development work.
-  PLATFORM_SDK_VERSION := 22
+  PLATFORM_SDK_VERSION := 23
 endif
 
 ifeq "" "$(PLATFORM_VERSION_CODENAME)"
@@ -68,6 +68,36 @@
   PLATFORM_VERSION_ALL_CODENAMES := $(PLATFORM_VERSION_CODENAME)
 endif
 
+ifeq "REL" "$(PLATFORM_VERSION_CODENAME)"
+  PLATFORM_PREVIEW_SDK_VERSION := 0
+else
+  ifeq "" "$(PLATFORM_PREVIEW_SDK_VERSION)"
+    # This is the definition of a preview SDK version over and above the current
+    # platform SDK version. Unlike the platform SDK version, a higher value
+    # for preview SDK version does NOT mean that all prior preview APIs are
+    # included. Packages reading this value to determine compatibility with
+    # known APIs should check that this value is precisely equal to the preview
+    # SDK version the package was built for, otherwise it should fall back to
+    # assuming the device can only support APIs as of the previous official
+    # public release.
+    # This value will always be 0 for release builds.
+    PLATFORM_PREVIEW_SDK_VERSION := 0
+  endif
+endif
+
+ifeq "" "$(DEFAULT_APP_TARGET_SDK)"
+  # This is the default minSdkVersion and targetSdkVersion to use for
+  # all .apks created by the build system.  It can be overridden by explicitly
+  # setting these in the .apk's AndroidManifest.xml.  It is either the code
+  # name of the development build or, if this is a release build, the official
+  # SDK version of this release.
+  ifeq "REL" "$(PLATFORM_VERSION_CODENAME)"
+    DEFAULT_APP_TARGET_SDK := $(PLATFORM_SDK_VERSION)
+  else
+    DEFAULT_APP_TARGET_SDK := $(PLATFORM_VERSION_CODENAME)
+  endif
+endif
+
 ifeq "" "$(PLATFORM_SECURITY_PATCH)"
   # Used to indicate the security patch that has been applied to the device.
   # Can be an arbitrary string, but must be a single word.
@@ -84,19 +114,6 @@
   PLATFORM_BASE_OS :=
 endif
 
-ifeq "" "$(DEFAULT_APP_TARGET_SDK)"
-  # This is the default minSdkVersion and targetSdkVersion to use for
-  # all .apks created by the build system.  It can be overridden by explicitly
-  # setting these in the .apk's AndroidManifest.xml.  It is either the code
-  # name of the development build or, if this is a release build, the official
-  # SDK version of this release.
-  ifeq "REL" "$(PLATFORM_VERSION_CODENAME)"
-    DEFAULT_APP_TARGET_SDK := $(PLATFORM_SDK_VERSION)
-  else
-    DEFAULT_APP_TARGET_SDK := $(PLATFORM_VERSION_CODENAME)
-  endif
-endif
-
 ifeq "" "$(BUILD_ID)"
   # Used to signify special builds.  E.g., branches and/or releases,
   # like "M5-RC7".  Can be an arbitrary string, but must be a single
diff --git a/envsetup.sh b/envsetup.sh
index bec6993..6ad3a9e 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -175,7 +175,7 @@
             ;;
     esac
 
-    export ANDROID_DEV_SCRIPTS=$T/development/scripts:$T/prebuilts/devtools/tools
+    export ANDROID_DEV_SCRIPTS=$T/development/scripts:$T/prebuilts/devtools/tools:$T/external/selinux/prebuilts/bin
     export ANDROID_BUILD_PATHS=$(get_build_var ANDROID_BUILD_PATHS):$ANDROID_TOOLCHAIN:$ANDROID_TOOLCHAIN_2ND_ARCH:$ANDROID_KERNEL_TOOLCHAIN_PATH$ANDROID_DEV_SCRIPTS:
 
     # If prebuilts/android-emulator/<system>/ exists, prepend it to our PATH
@@ -764,7 +764,7 @@
                 MAKEFILE="$MAKEFILE $MFILE"
             else
                 case $DIR in
-                  showcommands | snod | dist | incrementaljavac) ARGS="$ARGS $DIR";;
+                  showcommands | snod | dist | incrementaljavac | *=*) ARGS="$ARGS $DIR";;
                   GET-INSTALL-PATH) GET_INSTALL_PATH=$DIR;;
                   *) echo "No Android.mk in $DIR."; return 1;;
                 esac
@@ -822,7 +822,7 @@
         fi
       else
         case $DIR in
-          showcommands | snod | dist | incrementaljavac) ARGS="$ARGS $DIR";;
+          showcommands | snod | dist | incrementaljavac | *=*) ARGS="$ARGS $DIR";;
           *) echo "Couldn't find directory $DIR"; return 1;;
         esac
       fi
@@ -1108,6 +1108,11 @@
     find . -name .repo -prune -o -name .git -prune -o -path ./out -prune -o -name sepolicy -type d -print0 | xargs -0 grep --color -n -r --exclude-dir=\.git "$@"
 }
 
+function rcgrep()
+{
+    find . -name .repo -prune -o -name .git -prune -o -name out -prune -o -type f -name "*\.rc*" -print0 | xargs -0 grep --color -n "$@"
+}
+
 case `uname -s` in
     Darwin)
         function mgrep()
@@ -1350,14 +1355,20 @@
         return
     fi
     T=$(gettop)
-    if [[ ! -f $T/filelist ]]; then
+    if [ ! "$OUT_DIR" = "" ]; then
+        mkdir -p $OUT_DIR
+        FILELIST=$OUT_DIR/filelist
+    else
+        FILELIST=$T/filelist
+    fi
+    if [[ ! -f $FILELIST ]]; then
         echo -n "Creating index..."
-        (\cd $T; find . -wholename ./out -prune -o -wholename ./.repo -prune -o -type f > filelist)
+        (\cd $T; find . -wholename ./out -prune -o -wholename ./.repo -prune -o -type f > $FILELIST)
         echo " Done"
         echo ""
     fi
     local lines
-    lines=($(\grep "$1" $T/filelist | sed -e 's/\/[^/]*$//' | sort | uniq))
+    lines=($(\grep "$1" $FILELIST | sed -e 's/\/[^/]*$//' | sort | uniq))
     if [[ ${#lines[@]} = 0 ]]; then
         echo "Not found"
         return
diff --git a/target/board/generic/sepolicy/file_contexts b/target/board/generic/sepolicy/file_contexts
index 444a47f..d057dc3 100644
--- a/target/board/generic/sepolicy/file_contexts
+++ b/target/board/generic/sepolicy/file_contexts
@@ -1,8 +1,10 @@
 /dev/block/mtdblock0       u:object_r:system_block_device:s0
 /dev/block/mtdblock1       u:object_r:userdata_block_device:s0
 /dev/block/mtdblock2       u:object_r:cache_block_device:s0
+/dev/goldfish_pipe	u:object_r:qemu_device:s0
 /dev/qemu_.*		u:object_r:qemu_device:s0
 /dev/socket/qemud	u:object_r:qemud_socket:s0
+/dev/ttyGF[0-9]*	u:object_r:serial_device:s0
 /system/bin/qemud	u:object_r:qemud_exec:s0
 /sys/qemu_trace(/.*)?	--	u:object_r:sysfs_writable:s0
 /system/etc/init.goldfish.sh u:object_r:goldfish_setup_exec:s0
diff --git a/target/board/generic/sepolicy/goldfish_logcat.te b/target/board/generic/sepolicy/goldfish_logcat.te
deleted file mode 100644
index a785355..0000000
--- a/target/board/generic/sepolicy/goldfish_logcat.te
+++ /dev/null
@@ -1,10 +0,0 @@
-# goldfish-logcat service:  runs logcat -Q
-type goldfish_logcat, domain;
-
-domain_auto_trans(init, logcat_exec, goldfish_logcat)
-
-# Read from logd.
-read_logd(goldfish_logcat)
-
-# Write to /dev/ttyS2
-allow goldfish_logcat serial_device:chr_file { write open };
diff --git a/target/board/generic/sepolicy/goldfish_setup.te b/target/board/generic/sepolicy/goldfish_setup.te
index 584731e..3fb79e7 100644
--- a/target/board/generic/sepolicy/goldfish_setup.te
+++ b/target/board/generic/sepolicy/goldfish_setup.te
@@ -13,6 +13,12 @@
 allow goldfish_setup self:udp_socket create_socket_perms;
 
 # Set net.eth0.dns*, debug.sf.nobootanimation
-unix_socket_connect(goldfish_setup, property, init)
-allow goldfish_setup system_prop:property_service set;
-allow goldfish_setup debug_prop:property_service set;
+set_prop(goldfish_setup, system_prop)
+set_prop(goldfish_setup, debug_prop)
+
+# Set ro.radio.noril
+set_prop(goldfish_setup, radio_noril_prop)
+
+# Stop ril-daemon service (by setting ctl.stop to ril-daemon, which
+# transforms to a permission check on ctl.ril-daemon).
+set_prop(goldfish_setup, ctl_rildaemon_prop)
diff --git a/target/board/generic/sepolicy/init.te b/target/board/generic/sepolicy/init.te
new file mode 100644
index 0000000..3aa81d1
--- /dev/null
+++ b/target/board/generic/sepolicy/init.te
@@ -0,0 +1 @@
+allow init tmpfs:lnk_file create_file_perms;
diff --git a/target/board/generic/sepolicy/logd.te b/target/board/generic/sepolicy/logd.te
new file mode 100644
index 0000000..b3e60d7
--- /dev/null
+++ b/target/board/generic/sepolicy/logd.te
@@ -0,0 +1,11 @@
+# goldfish logcat service:  runs logcat -Q in logd domain
+
+# See global logd.te, these only set for eng & userdebug, allow for all builds
+
+domain_auto_trans(init, logcat_exec, logd)
+
+# Read from logd.
+read_logd(logd)
+
+# Write to /dev/ttyS2 and /dev/ttyGF2.
+allow logd serial_device:chr_file { write open };
diff --git a/target/board/generic/sepolicy/property.te b/target/board/generic/sepolicy/property.te
index b3d15f8..b316d08 100644
--- a/target/board/generic/sepolicy/property.te
+++ b/target/board/generic/sepolicy/property.te
@@ -1 +1,2 @@
 type qemu_prop, property_type;
+type radio_noril_prop, property_type;
diff --git a/target/board/generic/sepolicy/property_contexts b/target/board/generic/sepolicy/property_contexts
index 5f741f8..09b9b06 100644
--- a/target/board/generic/sepolicy/property_contexts
+++ b/target/board/generic/sepolicy/property_contexts
@@ -1 +1,2 @@
 qemu.                   u:object_r:qemu_prop:s0
+radio.noril             u:object_r:radio_noril_prop:s0
diff --git a/target/board/generic/sepolicy/qemu_props.te b/target/board/generic/sepolicy/qemu_props.te
index 05c7461..4a91c4c 100644
--- a/target/board/generic/sepolicy/qemu_props.te
+++ b/target/board/generic/sepolicy/qemu_props.te
@@ -5,5 +5,6 @@
 init_daemon_domain(qemu_props)
 
 # Set properties.
-unix_socket_connect(qemu_props, property, init)
-allow qemu_props { qemu_prop dalvik_prop config_prop }:property_service set;
+set_prop(qemu_props, qemu_prop)
+set_prop(qemu_props, dalvik_prop)
+set_prop(qemu_props, config_prop)
diff --git a/target/board/generic/sepolicy/qemud.te b/target/board/generic/sepolicy/qemud.te
index 41f2065..eee21c4 100644
--- a/target/board/generic/sepolicy/qemud.te
+++ b/target/board/generic/sepolicy/qemud.te
@@ -4,5 +4,5 @@
 
 init_daemon_domain(qemud)
 
-# Access /dev/ttyS1.
+# Access /dev/ttyS1 and /dev/ttyGF1.
 allow qemud serial_device:chr_file rw_file_perms;
diff --git a/target/board/generic_arm64/BoardConfig.mk b/target/board/generic_arm64/BoardConfig.mk
index 51b56ab..b757da1 100644
--- a/target/board/generic_arm64/BoardConfig.mk
+++ b/target/board/generic_arm64/BoardConfig.mk
@@ -82,3 +82,5 @@
 BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
 BOARD_FLASH_BLOCK_SIZE := 512
 TARGET_USERIMAGES_SPARSE_EXT_DISABLED := true
+
+BOARD_SEPOLICY_DIRS += build/target/board/generic/sepolicy
diff --git a/target/board/generic_mips/BoardConfig.mk b/target/board/generic_mips/BoardConfig.mk
index 33443ed..76a2ef4 100644
--- a/target/board/generic_mips/BoardConfig.mk
+++ b/target/board/generic_mips/BoardConfig.mk
@@ -54,7 +54,7 @@
 
 TARGET_USERIMAGES_USE_EXT4 := true
 BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1342177280
-BOARD_USERDATAIMAGE_PARTITION_SIZE := 576716800
+BOARD_USERDATAIMAGE_PARTITION_SIZE := 734003200
 BOARD_CACHEIMAGE_PARTITION_SIZE := 69206016
 BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
 BOARD_FLASH_BLOCK_SIZE := 512
diff --git a/target/board/generic_mips64/BoardConfig.mk b/target/board/generic_mips64/BoardConfig.mk
index 7fe6cd3..5c13447 100644
--- a/target/board/generic_mips64/BoardConfig.mk
+++ b/target/board/generic_mips64/BoardConfig.mk
@@ -71,3 +71,5 @@
 BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
 BOARD_FLASH_BLOCK_SIZE := 512
 TARGET_USERIMAGES_SPARSE_EXT_DISABLED := true
+
+BOARD_SEPOLICY_DIRS += build/target/board/generic/sepolicy
diff --git a/target/board/generic_x86/sepolicy/init.te b/target/board/generic_x86/sepolicy/init.te
new file mode 100644
index 0000000..3aa81d1
--- /dev/null
+++ b/target/board/generic_x86/sepolicy/init.te
@@ -0,0 +1 @@
+allow init tmpfs:lnk_file create_file_perms;
diff --git a/target/board/generic_x86_64/BoardConfig.mk b/target/board/generic_x86_64/BoardConfig.mk
index 3d222f9..5105161 100755
--- a/target/board/generic_x86_64/BoardConfig.mk
+++ b/target/board/generic_x86_64/BoardConfig.mk
@@ -41,9 +41,13 @@
 USE_OPENGL_RENDERER := true
 
 TARGET_USERIMAGES_USE_EXT4 := true
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1342177280
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1342177280  # 1.25 GB
 BOARD_USERDATAIMAGE_PARTITION_SIZE := 576716800
 BOARD_CACHEIMAGE_PARTITION_SIZE := 69206016
 BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
 BOARD_FLASH_BLOCK_SIZE := 512
 TARGET_USERIMAGES_SPARSE_EXT_DISABLED := true
+
+BOARD_SEPOLICY_DIRS += \
+        build/target/board/generic/sepolicy \
+        build/target/board/generic_x86/sepolicy
diff --git a/target/product/aosp_base_telephony.mk b/target/product/aosp_base_telephony.mk
index f326a00..0d4e333 100644
--- a/target/product/aosp_base_telephony.mk
+++ b/target/product/aosp_base_telephony.mk
@@ -14,3 +14,6 @@
 # limitations under the License.
 #
 $(call inherit-product, $(SRC_TARGET_DIR)/product/full_base_telephony.mk)
+
+PRODUCT_PACKAGES += \
+    messaging
diff --git a/target/product/base.mk b/target/product/base.mk
index 85c01a2..1699156 100644
--- a/target/product/base.mk
+++ b/target/product/base.mk
@@ -18,6 +18,7 @@
 PRODUCT_PACKAGES += \
     20-dns.conf \
     95-configured \
+    org.apache.http.legacy.boot \
     appwidget \
     appops \
     am \
@@ -35,6 +36,7 @@
     dpm \
     framework \
     fsck_msdos \
+    hid \
     ime \
     input \
     javax.obex \
@@ -65,12 +67,16 @@
     libnetlink \
     libnetutils \
     libpdfium \
+    libradio \
+    libradioservice \
+    libradio_metadata \
     libreference-ril \
     libreverbwrapper \
     libril \
     librtp_jni \
     libsensorservice \
     libskia \
+    libsonic \
     libsonivox \
     libsoundpool \
     libsoundtrigger \
@@ -107,8 +113,11 @@
     sdcard \
     services \
     settings \
+    sgdisk \
+    sm \
     svc \
     tc \
+    telecom \
     vdc \
     vold \
     wm
diff --git a/target/product/core_minimal.mk b/target/product/core_minimal.mk
index 33b49a6..27c10af 100644
--- a/target/product/core_minimal.mk
+++ b/target/product/core_minimal.mk
@@ -30,6 +30,7 @@
     PackageInstaller \
     SettingsProvider \
     Shell \
+    StatementService \
     bcc \
     bu \
     com.android.future.usb.accessory \
@@ -49,6 +50,7 @@
     ip-up-vpn \
     ip6tables \
     iptables \
+    gatekeeperd \
     keystore \
     keystore.default \
     ld.mc \
@@ -60,13 +62,13 @@
     libdrmframework_jni \
     libfilterfw \
     libkeystore \
+    libgatekeeper \
     libsqlite_jni \
     libwilhelm \
     logd \
     make_ext4fs \
     e2fsck \
     resize2fs \
-    mms-common \
     screencap \
     sensorservice \
     telephony-common \
@@ -91,9 +93,8 @@
     telephony-common \
     voip-common \
     ims-common \
-    mms-common \
-    android.policy \
     apache-xml \
+    org.apache.http.legacy.boot
 
 # The order of PRODUCT_SYSTEM_SERVER_JARS matters.
 PRODUCT_SYSTEM_SERVER_JARS := \
@@ -101,6 +102,13 @@
     ethernet-service \
     wifi-service
 
+# Adoptable external storage supports both ext4 and f2fs
+PRODUCT_PACKAGES += \
+    e2fsck \
+    make_ext4fs \
+    fsck.f2fs \
+    make_f2fs \
+
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += \
     ro.zygote=zygote32
 PRODUCT_COPY_FILES += \
diff --git a/target/product/core_tiny.mk b/target/product/core_tiny.mk
index 39789d9..0a92275 100644
--- a/target/product/core_tiny.mk
+++ b/target/product/core_tiny.mk
@@ -54,12 +54,14 @@
     ip-up-vpn \
     ip6tables \
     iptables \
+    gatekeeperd \
     keystore \
     keystore.default \
     libOpenMAXAL \
     libOpenSLES \
     libdownmix \
     libfilterfw \
+    libgatekeeper \
     libkeystore \
     libsqlite_jni \
     libwilhelm \
@@ -76,7 +78,6 @@
     telephony-common \
     voip-common \
     logd \
-    mms-common \
     wifi-service
 
 # The order matters
@@ -91,10 +92,9 @@
     telephony-common \
     voip-common \
     ims-common \
-    mms-common \
-    android.policy \
     apache-xml \
     nullwebview \
+    org.apache.http.legacy.boot
 
 # The order of PRODUCT_SYSTEM_SERVER_JARS matters.
 PRODUCT_SYSTEM_SERVER_JARS := \
@@ -112,6 +112,7 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/runtime_libart.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/product/base.mk)
 $(call inherit-product-if-exists, frameworks/base/data/fonts/fonts.mk)
+$(call inherit-product-if-exists, external/roboto-fonts/fonts.mk)
 
 # Overrides
 PRODUCT_BRAND := tiny
diff --git a/target/product/embedded.mk b/target/product/embedded.mk
index a408860..c40de4f 100644
--- a/target/product/embedded.mk
+++ b/target/product/embedded.mk
@@ -52,7 +52,6 @@
     libpower \
     libsigchain \
     libstdc++ \
-    libstlport \
     libsurfaceflinger \
     libsurfaceflinger_ddmconnection \
     libsysutils \
@@ -71,6 +70,7 @@
     surfaceflinger \
     toolbox \
     toybox \
+    tzdatacheck \
 
 # SELinux packages
 PRODUCT_PACKAGES += \
diff --git a/target/product/emulator.mk b/target/product/emulator.mk
index 3a8a4aa..7394d4f 100644
--- a/target/product/emulator.mk
+++ b/target/product/emulator.mk
@@ -40,15 +40,17 @@
     camera.goldfish.jpeg \
     lights.goldfish \
     gps.goldfish \
+    fingerprint.goldfish \
     sensors.goldfish \
-    e2fsck \
     audio.primary.goldfish \
     vibrator.goldfish \
     power.goldfish \
+    fingerprint.ranchu \
+    fingerprintd \
     sensors.ranchu
 
-
 PRODUCT_COPY_FILES += \
+    frameworks/native/data/etc/android.hardware.ethernet.xml:system/etc/permissions/android.hardware.ethernet.xml \
     device/generic/goldfish/fstab.goldfish:root/fstab.goldfish \
     device/generic/goldfish/init.goldfish.rc:root/init.goldfish.rc \
     device/generic/goldfish/init.goldfish.sh:system/etc/init.goldfish.sh \
diff --git a/target/product/full_base.mk b/target/product/full_base.mk
index d8dad79..65bdf0f 100644
--- a/target/product/full_base.mk
+++ b/target/product/full_base.mk
@@ -35,7 +35,6 @@
     MagicSmokeWallpapers \
     NoiseField \
     PhaseBeam \
-    VisualizationWallpapers \
     PhotoTable
 
 # Additional settings used in all AOSP builds
@@ -46,9 +45,6 @@
 # Put en_US first in the list, so make it default.
 PRODUCT_LOCALES := en_US
 
-# Include drawables for all densities
-PRODUCT_AAPT_CONFIG := normal
-
 # Get some sounds
 $(call inherit-product-if-exists, frameworks/base/data/sounds/AllAudio.mk)
 
diff --git a/target/product/generic_no_telephony.mk b/target/product/generic_no_telephony.mk
index dd18fab..f6ccd2a 100644
--- a/target/product/generic_no_telephony.mk
+++ b/target/product/generic_no_telephony.mk
@@ -19,6 +19,7 @@
 
 PRODUCT_PACKAGES := \
     Bluetooth \
+    BluetoothMidiService \
     Camera2 \
     Gallery2 \
     Music \
@@ -60,9 +61,10 @@
 $(call inherit-product-if-exists, external/google-fonts/carrois-gothic-sc/fonts.mk)
 $(call inherit-product-if-exists, external/google-fonts/coming-soon/fonts.mk)
 $(call inherit-product-if-exists, external/google-fonts/cutive-mono/fonts.mk)
-$(call inherit-product-if-exists, external/lohit-fonts/fonts.mk)
 $(call inherit-product-if-exists, external/noto-fonts/fonts.mk)
 $(call inherit-product-if-exists, external/naver-fonts/fonts.mk)
+$(call inherit-product-if-exists, external/roboto-fonts/fonts.mk)
+$(call inherit-product-if-exists, external/hyphenation-patterns/patterns.mk)
 $(call inherit-product-if-exists, frameworks/base/data/keyboards/keyboards.mk)
 $(call inherit-product-if-exists, frameworks/webview/chromium/chromium.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/product/core.mk)
diff --git a/target/product/languages_full.mk b/target/product/languages_full.mk
index 6d77cde..9d80b0e 100644
--- a/target/product/languages_full.mk
+++ b/target/product/languages_full.mk
@@ -21,4 +21,4 @@
 
 # These are all the locales that have translations and are displayable
 # by TextView in this branch.
-PRODUCT_LOCALES := en_US en_AU en_IN fr_FR it_IT es_ES et_EE de_DE nl_NL cs_CZ pl_PL ja_JP zh_TW zh_CN zh_HK ru_RU ko_KR nb_NO es_US da_DK el_GR tr_TR pt_PT pt_BR rm_CH sv_SE bg_BG ca_ES en_GB fi_FI hi_IN hr_HR hu_HU in_ID iw_IL lt_LT lv_LV ro_RO sk_SK sl_SI sr_RS uk_UA vi_VN tl_PH ar_EG fa_IR th_TH sw_TZ ms_MY af_ZA zu_ZA am_ET hi_IN en_XA ar_XB fr_CA km_KH lo_LA ne_NP si_LK mn_MN hy_AM az_AZ ka_GE my_MM mr_IN ml_IN is_IS mk_MK ky_KG eu_ES gl_ES bn_BD ta_IN kn_IN te_IN uz_UZ ur_PK kk_KZ
+PRODUCT_LOCALES := en_US en_AU en_IN fr_FR it_IT es_ES et_EE de_DE nl_NL cs_CZ pl_PL ja_JP zh_TW zh_CN zh_HK ru_RU ko_KR nb_NO es_US da_DK el_GR tr_TR pt_PT pt_BR rm_CH sv_SE bg_BG ca_ES en_GB fi_FI hi_IN hr_HR hu_HU in_ID iw_IL lt_LT lv_LV ro_RO sk_SK sl_SI sr_RS uk_UA vi_VN tl_PH ar_EG fa_IR th_TH sw_TZ ms_MY af_ZA zu_ZA am_ET hi_IN en_XA ar_XB fr_CA km_KH lo_LA ne_NP si_LK mn_MN hy_AM az_AZ ka_GE my_MM mr_IN ml_IN is_IS mk_MK ky_KG eu_ES gl_ES bn_BD ta_IN kn_IN te_IN uz_UZ ur_PK kk_KZ sq_AL gu_IN pa_IN
diff --git a/target/product/sdk_base.mk b/target/product/sdk_base.mk
index 451c0b7..73c2524 100644
--- a/target/product/sdk_base.mk
+++ b/target/product/sdk_base.mk
@@ -27,6 +27,7 @@
 	Fallback \
 	Gallery \
 	GestureBuilder \
+	Launcher3 \
 	LegacyCamera \
 	librs_jni \
 	libwnndict \
@@ -62,7 +63,7 @@
 	device/generic/goldfish/data/etc/apns-conf.xml:system/etc/apns-conf.xml \
 	frameworks/base/data/sounds/effects/camera_click.ogg:system/media/audio/ui/camera_click.ogg \
 	frameworks/base/data/sounds/effects/VideoRecord.ogg:system/media/audio/ui/VideoRecord.ogg \
-	frameworks/native/data/etc/handheld_core_hardware.xml:system/etc/permissions/handheld_core_hardware.xml \
+	device/generic/goldfish/data/etc/handheld_core_hardware.xml:system/etc/permissions/handheld_core_hardware.xml \
 	device/generic/goldfish/camera/media_profiles.xml:system/etc/media_profiles.xml \
 	frameworks/av/media/libstagefright/data/media_codecs_google_audio.xml:system/etc/media_codecs_google_audio.xml \
 	frameworks/av/media/libstagefright/data/media_codecs_google_telephony.xml:system/etc/media_codecs_google_telephony.xml \
@@ -83,6 +84,7 @@
 $(call inherit-product-if-exists, external/google-fonts/cutive-mono/fonts.mk)
 $(call inherit-product-if-exists, external/noto-fonts/fonts.mk)
 $(call inherit-product-if-exists, external/naver-fonts/fonts.mk)
+$(call inherit-product-if-exists, external/roboto-fonts/fonts.mk)
 $(call inherit-product-if-exists, frameworks/base/data/keyboards/keyboards.mk)
 $(call inherit-product-if-exists, frameworks/webview/chromium/chromium.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/product/core.mk)
diff --git a/target/product/telephony.mk b/target/product/telephony.mk
index da1497d..919d024 100644
--- a/target/product/telephony.mk
+++ b/target/product/telephony.mk
@@ -18,8 +18,9 @@
 # to products that have telephony hardware.
 
 PRODUCT_PACKAGES := \
+    CarrierConfig \
     Dialer \
-    Mms \
+    CallLogBackup \
     rild
 
 PRODUCT_COPY_FILES := \
diff --git a/target/product/vboot.mk b/target/product/vboot.mk
new file mode 100644
index 0000000..e4b1144
--- /dev/null
+++ b/target/product/vboot.mk
@@ -0,0 +1,24 @@
+#
+# Copyright (C) 2015 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Provides dependencies necessary for verified boot
+
+PRODUCT_SUPPORTS_VBOOT := true
+
+# The dev key is used to sign boot and recovery images.
+# We expect this file to exist with the suffixes ".vbprivk" and ".vbpupk".
+# TODO: find a proper location for this
+PRODUCT_VBOOT_SIGNING_KEY := external/vboot_reference/tests/devkeys/kernel_data_key
diff --git a/target/product/verity.mk b/target/product/verity.mk
index 0361b64..3e00b49 100644
--- a/target/product/verity.mk
+++ b/target/product/verity.mk
@@ -16,6 +16,7 @@
 
 # Provides dependencies necessary for verified boot
 
+PRODUCT_SUPPORTS_BOOT_SIGNER := true
 PRODUCT_SUPPORTS_VERITY := true
 
 # The dev key is used to sign boot and recovery images, and the verity
diff --git a/tools/buildinfo.sh b/tools/buildinfo.sh
index bbd3f16..5c199b8 100755
--- a/tools/buildinfo.sh
+++ b/tools/buildinfo.sh
@@ -7,6 +7,7 @@
 echo "ro.build.display.id=$BUILD_DISPLAY_ID"
 echo "ro.build.version.incremental=$BUILD_NUMBER"
 echo "ro.build.version.sdk=$PLATFORM_SDK_VERSION"
+echo "ro.build.version.preview_sdk=$PLATFORM_PREVIEW_SDK_VERSION"
 echo "ro.build.version.codename=$PLATFORM_VERSION_CODENAME"
 echo "ro.build.version.all_codenames=$PLATFORM_VERSION_ALL_CODENAMES"
 echo "ro.build.version.release=$PLATFORM_VERSION"
diff --git a/tools/droiddoc/templates-pdk/assets/images/android_logo.png b/tools/droiddoc/templates-pdk/assets/images/android_logo.png
new file mode 100644
index 0000000..4040f3f
--- /dev/null
+++ b/tools/droiddoc/templates-pdk/assets/images/android_logo.png
Binary files differ
diff --git a/tools/droiddoc/templates-pdk/components/masthead.cs b/tools/droiddoc/templates-pdk/components/masthead.cs
index 05437f3..874c11c 100644
--- a/tools/droiddoc/templates-pdk/components/masthead.cs
+++ b/tools/droiddoc/templates-pdk/components/masthead.cs
@@ -1,10 +1,9 @@
-<?cs 
+<?cs
 def:custom_masthead() ?>
   <div id="header">
       <div id="headerLeft">
           <a href="<?cs var:toroot ?>guide/index.html"><img
-              src="<?cs var:toroot ?>assets/images/android-partner-logo.png" alt="Android Platform Development Kit" /></a>
-       
+              src="<?cs var:toroot ?>assets/images/android_logo.png" alt="Android Platform Development Kit" /></a>
       </div>
       <div id="headerRight">
           <div id="headerLinks">
diff --git a/tools/droiddoc/templates-sac/assets/css/default.css b/tools/droiddoc/templates-sac/assets/css/default.css
index c1a0c19..f5dd624 100644
--- a/tools/droiddoc/templates-sac/assets/css/default.css
+++ b/tools/droiddoc/templates-sac/assets/css/default.css
@@ -1093,8 +1093,12 @@
 li {
   margin:0 0 5px;
 }
+dt {
+  font-weight:bold;
+}
 dd {
   margin:0 0 10px 30px;
+  padding: 5px;
 }
 dd p,
 dd pre,
@@ -4551,3 +4555,7 @@
 .fullpage #footer {
   margin-top: -40px;
 }
+
+.annotation-message {
+  display: block;
+}
diff --git a/tools/droiddoc/templates-sac/class.cs b/tools/droiddoc/templates-sac/class.cs
index 0461af6..4003ff5 100644
--- a/tools/droiddoc/templates-sac/class.cs
+++ b/tools/droiddoc/templates-sac/class.cs
@@ -123,6 +123,7 @@
   <?cs /if ?>
   <?cs set:colspan = colspan-1 ?>
 <?cs /each ?>
+<?cs call:show_annotations_list(class, "<span class='annotation-message'>", "</span><span class='annotation-message'>", "</span>") ?>
 
 </div><!-- end header -->
 
@@ -210,7 +211,10 @@
           <?cs var:field.final ?>
           <?cs call:type_link(field.type) ?></nobr></td>
           <td class="jd-linkcol"><?cs call:cond_link(field.name, toroot, field.href, included) ?></td>
-          <td class="jd-descrcol" width="100%"><?cs call:short_descr(field) ?></td>
+          <td class="jd-descrcol" width="100%"><?cs call:short_descr(field) ?>
+              <?cs each:anno = field.showAnnotations ?>
+                  <?cs call:show_annotations_list(field, "<span class='annotation-message'>", "</span><span class='annotation-message'>", "</span>") ?>
+              <?cs /each ?></td>
       </tr>
       <?cs set:count = count + #1 ?>
     <?cs /each ?>
diff --git a/tools/droiddoc/templates-sdk/assets/css/default.css b/tools/droiddoc/templates-sdk/assets/css/default.css
index 693027a..d493566 100644
--- a/tools/droiddoc/templates-sdk/assets/css/default.css
+++ b/tools/droiddoc/templates-sdk/assets/css/default.css
@@ -6362,7 +6362,7 @@
 .dac-button.dac-raised.dac-primary, .landing-secondary, .button {
   background-color: #039bef; }
   .dac-button.dac-raised.dac-primary:hover, .landing-secondary:hover, .button:hover {
-    background-color: #0288d1; }
+    background-color: #0288d1; color:#fff; }
   .dac-button.dac-raised.dac-primary:active, .landing-secondary:active, .button:active {
     background-color: #0277bd; }
 
@@ -8787,3 +8787,73 @@
   position: absolute;
   top: -4px;
 }
+
+/* CHANGE EXISTING SELECTOR FOR ANDROID M HERO ONLY
+   REMOVE THE BELOW STYLES WHEN THE ANDROID M CAROUSEL
+   GRAPHIC ON THE MAIN LANDING IS TAKEN DOWN */
+.dac-hero.mprev {
+  background-color: #fff;
+  background-position: 50% 53%;
+  background-size: cover;
+  background-image: url(../../assets/images/home/android_m_hero_1200.jpg);
+  box-sizing: border-box;
+  font-size: 16px;
+  min-height: 550px;
+  padding-top: 88px;
+}
+.dac-hero.dac-darken.mprev::before {
+  background: rgba(0, 0, 0, 0.3);
+  bottom: 0;
+  content: '';
+  display: block;
+  left: 0;
+  position: absolute;
+  right: 0;
+  top: 0;
+}
+
+.dac-hero.dac-darken.mprev::before {
+  background: -webkit-linear-gradient(top, rgba(0, 0, 0, .05), rgba(0, 0, 0, .05), #000 950px);
+  background: linear-gradient(to bottom, rgba(0, 0, 0, .05), rgba(0, 0, 0, 0.05), #000 950px);
+}
+
+@media (max-width: 719px) {
+
+  .dac-hero.dac-darken.mprev {
+    background-size: auto 600px;
+    background-position: 55% 0;
+    background-repeat: no-repeat;
+  }
+
+  .dac-hero-figure.mprev {
+    height: 10px;
+    margin: 15px 0;
+  }
+}
+
+@media (max-width: 719px) {
+
+  .dac-hero.dac-darken.mprev {
+    background-size: auto 600px;
+    background-position: 55% 0;
+    background-repeat: no-repeat;
+  }
+
+  .dac-hero-figure.mprev {
+    height: 10px;
+    margin: 15px 0;
+  }
+}
+
+@media (max-width: 1200px) {
+
+  .dac-hero.dac-darken.mprev {
+    background-size: auto 700px;
+    background-position: 55% 0;
+    background-repeat: no-repeat;
+  }
+
+  .dac-hero-cta.mprev {
+  white-space:nowrap;
+  }
+}
\ No newline at end of file
diff --git a/tools/droiddoc/templates-sdk/assets/images/home/android_m_hero_1200.jpg b/tools/droiddoc/templates-sdk/assets/images/home/android_m_hero_1200.jpg
new file mode 100644
index 0000000..6b79295
--- /dev/null
+++ b/tools/droiddoc/templates-sdk/assets/images/home/android_m_hero_1200.jpg
Binary files differ
diff --git a/tools/droiddoc/templates-sdk/sdkpage.cs b/tools/droiddoc/templates-sdk/sdkpage.cs
index 8ec034f..47c2992 100644
--- a/tools/droiddoc/templates-sdk/sdkpage.cs
+++ b/tools/droiddoc/templates-sdk/sdkpage.cs
@@ -342,7 +342,7 @@
   <tr>
     <td rowspan="3">Windows</td>
     <td>
-  <a onclick="return onDownload(this)" id="win-bundle"
+  <a onclick="return onDownload(this,false,true)" id="win-bundle"
     href="https://dl.google.com/dl/android/studio/install/<?cs var:studio.version ?>/<?cs var:studio.win_bundle_exe_download ?>"
     ><?cs var:studio.win_bundle_exe_download ?></a><br>(Recommended)
     </td>
@@ -353,7 +353,7 @@
   <tr>
     <!-- blank TD from Windows rowspan -->
     <td>
-  <a onclick="return onDownload(this)"
+  <a onclick="return onDownload(this,false,true)" id="win-bundle-notools"
     href="https://dl.google.com/dl/android/studio/install/<?cs var:studio.version ?>/<?cs var:studio.win_notools_exe_download ?>"
     ><?cs var:studio.win_notools_exe_download ?></a><br>(No SDK tools included)
     </td>
@@ -364,7 +364,7 @@
   <tr>
     <!-- blank TD from Windows rowspan -->
     <td>
-  <a onclick="return onDownload(this)"
+  <a onclick="return onDownload(this,false,true)" id="win-bundle-zip"
     href="https://dl.google.com/dl/android/studio/ide-zips/<?cs var:studio.version ?>/<?cs var:studio.win_bundle_download ?>"
     ><?cs var:studio.win_bundle_download ?></a>
     </td>
@@ -375,7 +375,7 @@
   <tr>
     <td><nobr>Mac OS X</nobr></td>
     <td>
-  <a onclick="return onDownload(this)" id="mac-bundle"
+  <a onclick="return onDownload(this,false,true)" id="mac-bundle"
     href="https://dl.google.com/dl/android/studio/install/<?cs var:studio.version ?>/<?cs var:studio.mac_bundle_download ?>"
     ><?cs var:studio.mac_bundle_download ?></a>
     </td>
@@ -386,7 +386,7 @@
   <tr>
     <td>Linux</td>
     <td>
-  <a onclick="return onDownload(this)" id="linux-bundle"
+  <a onclick="return onDownload(this,false,true)" id="linux-bundle"
     href="https://dl.google.com/dl/android/studio/ide-zips/<?cs var:studio.version ?>/<?cs var:studio.linux_bundle_download ?>"
     ><?cs var:studio.linux_bundle_download ?></a>
     </td>
@@ -404,6 +404,7 @@
 
 
 <script>
+
   if (location.hash == "#Requirements") {
     $('.reqs').show();
   } else if (location.hash == "#ExistingIDE") {
@@ -434,7 +435,7 @@
     $('#not-supported').hide();
 
     /* set up primary Android Studio download button */
-    $('.download-bundle-button').append(" <br/><span class='small'>for " + os + "</span>");
+    $('.download-bundle-button > .small').html(" for " + os);
     $('.download-bundle-button').click(function() {return onDownload(this,true,true);}).attr('href', bundlename);
   }
 
@@ -449,7 +450,11 @@
     }
 
     $("#downloadForRealz").attr('bundle', bundle);
-    $("a#downloadForRealz").attr("name", $(link).attr('href'));
+    if (bundle && !button) {
+      $("a#downloadForRealz").attr("name", "#" + $(link).attr('id'));
+    } else {
+      $("a#downloadForRealz").attr("name", $(link).attr('href'));
+    }
 
     $("#tos").show();
     $("#landing").hide();
@@ -501,9 +506,6 @@
       ga('send', 'event', 'SDK', 'IDE and Tools', $("#downloadForRealz").html());
       return true;
     } else {
-      $("label#agreeLabel").parent().stop().animate({color: "#258AAF"}, 200,
-        function() {$("label#agreeLabel").parent().stop().animate({color: "#222"}, 200)}
-      );
       return false;
     }
   }
diff --git a/tools/fs_config/fs_config.c b/tools/fs_config/fs_config.c
index f594c1e..b9a14e1 100644
--- a/tools/fs_config/fs_config.c
+++ b/tools/fs_config/fs_config.c
@@ -68,16 +68,17 @@
 }
 
 static void usage() {
-  fprintf(stderr, "Usage: fs_config [-S context_file] [-C]\n");
+  fprintf(stderr, "Usage: fs_config [-D product_out_path] [-S context_file] [-C]\n");
 }
 
 int main(int argc, char** argv) {
   char buffer[1024];
   const char* context_file = NULL;
+  const char* product_out_path = NULL;
   struct selabel_handle* sehnd = NULL;
   int print_capabilities = 0;
   int opt;
-  while((opt = getopt(argc, argv, "CS:")) != -1) {
+  while((opt = getopt(argc, argv, "CS:D:")) != -1) {
     switch(opt) {
     case 'C':
       print_capabilities = 1;
@@ -85,6 +86,9 @@
     case 'S':
       context_file = optarg;
       break;
+    case 'D':
+      product_out_path = optarg;
+      break;
     default:
       usage();
       exit(EXIT_FAILURE);
@@ -115,7 +119,7 @@
 
     unsigned uid = 0, gid = 0, mode = 0;
     uint64_t capabilities;
-    fs_config(buffer, is_dir, &uid, &gid, &mode, &capabilities);
+    fs_config(buffer, is_dir, product_out_path, &uid, &gid, &mode, &capabilities);
     printf("%s %d %d %o", buffer, uid, gid, mode);
 
     if (sehnd != NULL) {
diff --git a/tools/fs_get_stats/fs_get_stats.c b/tools/fs_get_stats/fs_get_stats.c
index a9814b9..159e2aa 100644
--- a/tools/fs_get_stats/fs_get_stats.c
+++ b/tools/fs_get_stats/fs_get_stats.c
@@ -25,11 +25,12 @@
 {
 	fprintf(stderr, "fs_get_stats: retrieve the target file stats "
 	        "for the specified file\n");
-	fprintf(stderr, "usage: fs_get_stats cur_perms is_dir filename\n");
+	fprintf(stderr, "usage: fs_get_stats cur_perms is_dir filename targetout\n");
 	fprintf(stderr, "\tcur_perms - The current permissions of "
 	        "the file\n");
 	fprintf(stderr, "\tis_dir    - Is filename is a dir, 1. Otherwise, 0.\n");
 	fprintf(stderr, "\tfilename  - The filename to lookup\n");
+	fprintf(stderr, "\ttargetout - The target out path to query device specific FS configs\n");
 	fprintf(stderr, "\n");
 }
 
@@ -42,7 +43,7 @@
 	unsigned uid = (unsigned)-1;
 	unsigned gid = (unsigned)-1;
 
-	if (argc < 4) {
+	if (argc < 5) {
 		ERROR("Invalid arguments\n");
 		print_help();
 		exit(-1);
@@ -58,7 +59,7 @@
 		is_dir = 1;
 
 	uint64_t capabilities;
-	fs_config(argv[3], is_dir, &uid, &gid, &perms, &capabilities);
+	fs_config(argv[3], is_dir, argv[4], &uid, &gid, &perms, &capabilities);
 	fprintf(stdout, "%d %d 0%o\n", uid, gid, perms);
 
 	return 0;
diff --git a/tools/java-event-log-tags.py b/tools/java-event-log-tags.py
index 846d9cf..f364751 100755
--- a/tools/java-event-log-tags.py
+++ b/tools/java-event-log-tags.py
@@ -129,7 +129,7 @@
     out += "_"
   return out
 
-javaTypes = ["ERROR", "int", "long", "String", "Object[]"]
+javaTypes = ["ERROR", "int", "long", "String", "Object[]", "float"]
 for t in tagfile.tags:
   methodName = javaName("write_" + t.tagname)
   if t.description:
diff --git a/tools/mktarball.sh b/tools/mktarball.sh
index 3e32006..ef0fe86 100755
--- a/tools/mktarball.sh
+++ b/tools/mktarball.sh
@@ -5,8 +5,9 @@
 # $3: subdir to tar up (from $2)
 # $4: target tar name
 # $5: target tarball name (usually $(3).bz2)
+# $6: TARGET_OUT path to query device specific FS configs
 
-if [ $# -ne 5 ]; then
+if [ $# -ne 6 ]; then
     echo "Error: wrong number of arguments in cmd: $0 $* "
     exit 1
 fi
@@ -16,6 +17,7 @@
 dir_to_tar=$3
 target_tar=`readlink -f $4`
 target_tarball=`readlink -f $5`
+target_out=`readlink -f $6`
 
 cd $2
 
@@ -28,7 +30,7 @@
 for f in ${subdirs} ${files} ; do
     curr_perms=`stat -c 0%a $f`
     [ -d "$f" ] && is_dir=1 || is_dir=0
-    new_info=`${fs_get_stats} ${curr_perms} ${is_dir} ${f}`
+    new_info=`${fs_get_stats} ${curr_perms} ${is_dir} ${f} ${target_out}`
     new_uid=`echo ${new_info} | awk '{print $1;}'`
     new_gid=`echo ${new_info} | awk '{print $2;}'`
     new_perms=`echo ${new_info} | awk '{print $3;}'`
diff --git a/tools/releasetools/add_img_to_target_files.py b/tools/releasetools/add_img_to_target_files.py
index 7984ad6..eab8113 100755
--- a/tools/releasetools/add_img_to_target_files.py
+++ b/tools/releasetools/add_img_to_target_files.py
@@ -33,10 +33,6 @@
 import tempfile
 import zipfile
 
-# missing in Python 2.4 and before
-if not hasattr(os, "SEEK_SET"):
-  os.SEEK_SET = 0
-
 import build_image
 import common
 
@@ -189,7 +185,7 @@
   assert succ, "build userdata.img image failed"
 
   common.CheckSize(img.name, "userdata.img", OPTIONS.info_dict)
-  output_zip.write(img.name, prefix + "userdata.img")
+  common.ZipWrite(output_zip, img.name, prefix + "userdata.img")
   img.close()
   os.rmdir(user_dir)
   os.rmdir(temp_dir)
@@ -226,7 +222,7 @@
   assert succ, "build cache.img image failed"
 
   common.CheckSize(img.name, "cache.img", OPTIONS.info_dict)
-  output_zip.write(img.name, prefix + "cache.img")
+  common.ZipWrite(output_zip, img.name, prefix + "cache.img")
   img.close()
   os.rmdir(user_dir)
   os.rmdir(temp_dir)
@@ -252,7 +248,7 @@
     OPTIONS.info_dict["selinux_fc"] = os.path.join(
         OPTIONS.input_tmp, "BOOT", "RAMDISK", "file_contexts")
 
-  input_zip.close()
+  common.ZipClose(input_zip)
   output_zip = zipfile.ZipFile(filename, "a",
                                compression=zipfile.ZIP_DEFLATED)
 
@@ -297,7 +293,7 @@
   banner("cache")
   AddCache(output_zip)
 
-  output_zip.close()
+  common.ZipClose(output_zip)
 
 def main(argv):
   def option_handler(o, _):
diff --git a/tools/releasetools/blockimgdiff.py b/tools/releasetools/blockimgdiff.py
index d549f70..8060b58 100644
--- a/tools/releasetools/blockimgdiff.py
+++ b/tools/releasetools/blockimgdiff.py
@@ -74,7 +74,7 @@
   def ReadRangeSet(self, ranges):
     raise NotImplementedError
 
-  def TotalSha1(self):
+  def TotalSha1(self, include_clobbered_blocks=False):
     raise NotImplementedError
 
 
@@ -82,11 +82,16 @@
   """A zero-length image."""
   blocksize = 4096
   care_map = RangeSet()
+  clobbered_blocks = RangeSet()
+  extended = RangeSet()
   total_blocks = 0
   file_map = {}
   def ReadRangeSet(self, ranges):
     return ()
-  def TotalSha1(self):
+  def TotalSha1(self, include_clobbered_blocks=False):
+    # EmptyImage always carries empty clobbered_blocks, so
+    # include_clobbered_blocks can be ignored.
+    assert self.clobbered_blocks.size() == 0
     return sha1().hexdigest()
 
 
@@ -100,11 +105,13 @@
     assert not (trim and pad)
 
     partial = len(self.data) % self.blocksize
+    padded = False
     if partial > 0:
       if trim:
         self.data = self.data[:-partial]
       elif pad:
         self.data += '\0' * (self.blocksize - partial)
+        padded = True
       else:
         raise ValueError(("data for DataImage must be multiple of %d bytes "
                           "unless trim or pad is specified") %
@@ -114,12 +121,23 @@
 
     self.total_blocks = len(self.data) / self.blocksize
     self.care_map = RangeSet(data=(0, self.total_blocks))
+    # When the last block is padded, we always write the whole block even for
+    # incremental OTAs. Because otherwise the last block may get skipped if
+    # unchanged for an incremental, but would fail the post-install
+    # verification if it has non-zero contents in the padding bytes.
+    # Bug: 23828506
+    if padded:
+      self.clobbered_blocks = RangeSet(
+          data=(self.total_blocks-1, self.total_blocks))
+    else:
+      self.clobbered_blocks = RangeSet()
+    self.extended = RangeSet()
 
     zero_blocks = []
     nonzero_blocks = []
     reference = '\0' * self.blocksize
 
-    for i in range(self.total_blocks):
+    for i in range(self.total_blocks-1 if padded else self.total_blocks):
       d = self.data[i*self.blocksize : (i+1)*self.blocksize]
       if d == reference:
         zero_blocks.append(i)
@@ -131,11 +149,18 @@
     self.file_map = {"__ZERO": RangeSet(zero_blocks),
                      "__NONZERO": RangeSet(nonzero_blocks)}
 
+    if self.clobbered_blocks:
+      self.file_map["__COPY"] = self.clobbered_blocks
+
   def ReadRangeSet(self, ranges):
     return [self.data[s*self.blocksize:e*self.blocksize] for (s, e) in ranges]
 
-  def TotalSha1(self):
-    return sha1(self.data).hexdigest()
+  def TotalSha1(self, include_clobbered_blocks=False):
+    if not include_clobbered_blocks:
+      ranges = self.care_map.subtract(self.clobbered_blocks)
+      return sha1(self.ReadRangeSet(ranges)).hexdigest()
+    else:
+      return sha1(self.data).hexdigest()
 
 
 class Transfer(object):
@@ -184,6 +209,10 @@
 #      (Typically a domain is a file, and the key in file_map is the
 #      pathname.)
 #
+#    clobbered_blocks: a RangeSet containing which blocks contain data
+#      but may be altered by the FS. They need to be excluded when
+#      verifying the partition integrity.
+#
 #    ReadRangeSet(): a function that takes a RangeSet and returns the
 #      data contained in the image blocks of that RangeSet.  The data
 #      is returned as a list or tuple of strings; concatenating the
@@ -193,14 +222,15 @@
 #
 #    TotalSha1(): a function that returns (as a hex string) the SHA-1
 #      hash of all the data in the image (ie, all the blocks in the
-#      care_map)
+#      care_map minus clobbered_blocks, or including the clobbered
+#      blocks if include_clobbered_blocks is True).
 #
 # When creating a BlockImageDiff, the src image may be None, in which
 # case the list of transfers produced will never read from the
 # original image.
 
 class BlockImageDiff(object):
-  def __init__(self, tgt, src=None, threads=None, version=2):
+  def __init__(self, tgt, src=None, threads=None, version=3):
     if threads is None:
       threads = multiprocessing.cpu_count() // 2
       if threads == 0:
@@ -211,7 +241,7 @@
     self.src_basenames = {}
     self.src_numpatterns = {}
 
-    assert version in (1, 2)
+    assert version in (1, 2, 3)
 
     self.tgt = tgt
     if src is None:
@@ -295,7 +325,15 @@
           next_stash_id += 1
         stashes[s] = sid
         stashed_blocks += sr.size()
-        out.append("stash %d %s\n" % (sid, sr.to_string_raw()))
+        if self.version == 2:
+          out.append("stash %d %s\n" % (sid, sr.to_string_raw()))
+        else:
+          sh = self.HashBlocks(self.src, sr)
+          if sh in stashes:
+            stashes[sh] += 1
+          else:
+            stashes[sh] = 1
+            out.append("stash %s %s\n" % (sh, sr.to_string_raw()))
 
       if stashed_blocks > max_stashed_blocks:
         max_stashed_blocks = stashed_blocks
@@ -321,6 +359,7 @@
           sid = stashes.pop(s)
           stashed_blocks -= sr.size()
           unstashed_src_ranges = unstashed_src_ranges.subtract(sr)
+          sh = self.HashBlocks(self.src, sr)
           sr = xf.src_ranges.map_within(sr)
           mapped_stashes.append(sr)
           if self.version == 2:
@@ -347,7 +386,7 @@
 
         src_str = " ".join(src_str)
 
-      # both versions:
+      # all versions:
       #   zero <rangeset>
       #   new <rangeset>
       #   erase <rangeset>
@@ -389,7 +428,7 @@
           elif self.version >= 3:
             # take into account automatic stashing of overlapping blocks
             if xf.src_ranges.overlaps(xf.tgt_ranges):
-              temp_stash_usage = stashed_blocks + xf.src_ranges.size();
+              temp_stash_usage = stashed_blocks + xf.src_ranges.size()
               if temp_stash_usage > max_stashed_blocks:
                 max_stashed_blocks = temp_stash_usage
 
@@ -413,7 +452,7 @@
         elif self.version >= 3:
           # take into account automatic stashing of overlapping blocks
           if xf.src_ranges.overlaps(xf.tgt_ranges):
-            temp_stash_usage = stashed_blocks + xf.src_ranges.size();
+            temp_stash_usage = stashed_blocks + xf.src_ranges.size()
             if temp_stash_usage > max_stashed_blocks:
               max_stashed_blocks = temp_stash_usage
 
@@ -440,18 +479,17 @@
       # stash space
       assert max_stashed_blocks * self.tgt.blocksize < (512 << 20)
 
+    # Zero out extended blocks as a workaround for bug 20881595.
+    if self.tgt.extended:
+      out.append("zero %s\n" % (self.tgt.extended.to_string_raw(),))
+
+    # We erase all the blocks on the partition that a) don't contain useful
+    # data in the new image and b) will not be touched by dm-verity.
     all_tgt = RangeSet(data=(0, self.tgt.total_blocks))
-    if performs_read:
-      # if some of the original data is used, then at the end we'll
-      # erase all the blocks on the partition that don't contain data
-      # in the new image.
-      new_dontcare = all_tgt.subtract(self.tgt.care_map)
-      if new_dontcare:
-        out.append("erase %s\n" % (new_dontcare.to_string_raw(),))
-    else:
-      # if nothing is read (ie, this is a full OTA), then we can start
-      # by erasing the entire partition.
-      out.insert(0, "erase %s\n" % (all_tgt.to_string_raw(),))
+    all_tgt_minus_extended = all_tgt.subtract(self.tgt.extended)
+    new_dontcare = all_tgt_minus_extended.subtract(self.tgt.care_map)
+    if new_dontcare:
+      out.append("erase %s\n" % (new_dontcare.to_string_raw(),))
 
     out.insert(0, "%d\n" % (self.version,))   # format version number
     out.insert(1, str(total) + "\n")
@@ -835,6 +873,12 @@
                  "zero", self.transfers)
         continue
 
+      elif tgt_fn == "__COPY":
+        # "__COPY" domain includes all the blocks not contained in any
+        # file and that need to be copied unconditionally to the target.
+        Transfer(tgt_fn, None, tgt_ranges, empty, "new", self.transfers)
+        continue
+
       elif tgt_fn in self.src.file_map:
         # Look for an exact pathname match in the source.
         Transfer(tgt_fn, tgt_fn, tgt_ranges, self.src.file_map[tgt_fn],
diff --git a/tools/releasetools/build_image.py b/tools/releasetools/build_image.py
index 033ade9..4b43c0c 100755
--- a/tools/releasetools/build_image.py
+++ b/tools/releasetools/build_image.py
@@ -22,26 +22,31 @@
 """
 import os
 import os.path
+import re
 import subprocess
 import sys
 import commands
+import common
 import shutil
 import tempfile
 
+OPTIONS = common.OPTIONS
+
 FIXED_SALT = "aee087a5be3b982978c923f566a94613496b417f2af592639bc80d141e34dfe7"
 
 def RunCommand(cmd):
-  """ Echo and run the given command
+  """Echo and run the given command.
 
   Args:
     cmd: the command represented as a list of strings.
   Returns:
-    The exit code.
+    A tuple of the output and the exit code.
   """
   print "Running: ", " ".join(cmd)
-  p = subprocess.Popen(cmd)
-  p.communicate()
-  return p.returncode
+  p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+  output, _ = p.communicate()
+  print "%s" % (output.rstrip(),)
+  return (output, p.returncode)
 
 def GetVerityTreeSize(partition_size):
   cmd = "build_verity_tree -s %d"
@@ -55,6 +60,7 @@
 def GetVerityMetadataSize(partition_size):
   cmd = "system/extras/verity/build_verity_metadata.py -s %d"
   cmd %= partition_size
+
   status, output = commands.getstatusoutput(cmd)
   if status:
     print output
@@ -142,7 +148,7 @@
     else:
       return True, unsparse_image_path
   inflate_command = ["simg2img", sparse_image_path, unsparse_image_path]
-  exit_code = RunCommand(inflate_command)
+  (_, exit_code) = RunCommand(inflate_command)
   if exit_code != 0:
     os.remove(unsparse_image_path)
     return False, None
@@ -162,7 +168,11 @@
   image_size = prop_dict["partition_size"]
   block_dev = prop_dict["verity_block_device"]
   signer_key = prop_dict["verity_key"] + ".pk8"
-  signer_path = prop_dict["verity_signer_cmd"]
+  if OPTIONS.verity_signer_path is not None:
+    signer_path = OPTIONS.verity_signer_path + ' '
+    signer_path += ' '.join(OPTIONS.verity_signer_args)
+  else:
+    signer_path = prop_dict["verity_signer_cmd"]
 
   # make a tempdir
   tempdir_name = tempfile.mkdtemp(suffix="_verity_images")
@@ -194,19 +204,20 @@
   shutil.rmtree(tempdir_name, ignore_errors=True)
   return True
 
-def BuildImage(in_dir, prop_dict, out_file):
+def BuildImage(in_dir, prop_dict, out_file, target_out=None):
   """Build an image to out_file from in_dir with property prop_dict.
 
   Args:
     in_dir: path of input directory.
     prop_dict: property dictionary.
     out_file: path of the output image file.
+    target_out: path of the product out directory to read device specific FS config files.
 
   Returns:
     True iff the image is built successfully.
   """
-  # system_root_image=true: build a system.img that combines the contents of /system
-  # and the ramdisk, and can be mounted at the root of the file system.
+  # system_root_image=true: build a system.img that combines the contents of
+  # /system and the ramdisk, and can be mounted at the root of the file system.
   origin_in = in_dir
   fs_config = prop_dict.get("fs_config")
   if (prop_dict.get("system_root_image") == "true"
@@ -233,13 +244,15 @@
 
   fs_spans_partition = True
   if fs_type.startswith("squash"):
-      fs_spans_partition = False
+    fs_spans_partition = False
 
   is_verity_partition = "verity_block_device" in prop_dict
   verity_supported = prop_dict.get("verity") == "true"
-  # adjust the partition size to make room for the hashes if this is to be verified
+  # Adjust the partition size to make room for the hashes if this is to be
+  # verified.
   if verity_supported and is_verity_partition and fs_spans_partition:
     partition_size = int(prop_dict.get("partition_size"))
+
     adjusted_size = AdjustPartitionSizeForVerity(partition_size)
     if not adjusted_size:
       return False
@@ -260,6 +273,8 @@
       build_command.extend(["-T", str(prop_dict["timestamp"])])
     if fs_config:
       build_command.extend(["-C", fs_config])
+    if target_out:
+      build_command.extend(["-D", target_out])
     if "block_list" in prop_dict:
       build_command.extend(["-B", prop_dict["block_list"]])
     build_command.extend(["-L", prop_dict["mount_point"]])
@@ -270,6 +285,8 @@
     build_command.extend([in_dir, out_file])
     build_command.extend(["-s"])
     build_command.extend(["-m", prop_dict["mount_point"]])
+    if target_out:
+      build_command.extend(["-d", target_out])
     if "selinux_fc" in prop_dict:
       build_command.extend(["-c", prop_dict["selinux_fc"]])
     if "squashfs_compressor" in prop_dict:
@@ -298,8 +315,15 @@
     staging_system = os.path.join(in_dir, "system")
     shutil.rmtree(staging_system, ignore_errors=True)
     shutil.copytree(origin_in, staging_system, symlinks=True)
+
+  reserved_blocks = prop_dict.get("has_ext4_reserved_blocks") == "true"
+  ext4fs_output = None
+
   try:
-    exit_code = RunCommand(build_command)
+    if reserved_blocks and fs_type.startswith("ext4"):
+      (ext4fs_output, exit_code) = RunCommand(build_command)
+    else:
+      (_, exit_code) = RunCommand(build_command)
   finally:
     if in_dir != origin_in:
       # Clean up temporary directories and files.
@@ -309,17 +333,42 @@
   if exit_code != 0:
     return False
 
+  # Bug: 21522719, 22023465
+  # There are some reserved blocks on ext4 FS (lesser of 4096 blocks and 2%).
+  # We need to deduct those blocks from the available space, since they are
+  # not writable even with root privilege. It only affects devices using
+  # file-based OTA and a kernel version of 3.10 or greater (currently just
+  # sprout).
+  if reserved_blocks and fs_type.startswith("ext4"):
+    assert ext4fs_output is not None
+    ext4fs_stats = re.compile(
+        r'Created filesystem with .* (?P<used_blocks>[0-9]+)/'
+        r'(?P<total_blocks>[0-9]+) blocks')
+    m = ext4fs_stats.match(ext4fs_output.strip().split('\n')[-1])
+    used_blocks = int(m.groupdict().get('used_blocks'))
+    total_blocks = int(m.groupdict().get('total_blocks'))
+    reserved_blocks = min(4096, int(total_blocks * 0.02))
+    adjusted_blocks = total_blocks - reserved_blocks
+    if used_blocks > adjusted_blocks:
+      mount_point = prop_dict.get("mount_point")
+      print("Error: Not enough room on %s (total: %d blocks, used: %d blocks, "
+            "reserved: %d blocks, available: %d blocks)" % (
+                mount_point, total_blocks, used_blocks, reserved_blocks,
+                adjusted_blocks))
+      return False
+
   if not fs_spans_partition:
     mount_point = prop_dict.get("mount_point")
     partition_size = int(prop_dict.get("partition_size"))
     image_size = os.stat(out_file).st_size
     if image_size > partition_size:
-        print "Error: %s image size of %d is larger than partition size of %d" % (mount_point, image_size, partition_size)
-        return False
+      print("Error: %s image size of %d is larger than partition size of "
+            "%d" % (mount_point, image_size, partition_size))
+      return False
     if verity_supported and is_verity_partition:
-        if 2 * image_size - AdjustPartitionSizeForVerity(image_size) > partition_size:
-            print "Error: No more room on %s to fit verity data" % mount_point
-            return False
+      if 2 * image_size - AdjustPartitionSizeForVerity(image_size) > partition_size:
+        print "Error: No more room on %s to fit verity data" % mount_point
+        return False
     prop_dict["original_partition_size"] = prop_dict["partition_size"]
     prop_dict["partition_size"] = str(image_size)
 
@@ -335,7 +384,7 @@
 
     # Run e2fsck on the inflated image file
     e2fsck_command = ["e2fsck", "-f", "-n", unsparse_image]
-    exit_code = RunCommand(e2fsck_command)
+    (_, exit_code) = RunCommand(e2fsck_command)
 
     os.remove(unsparse_image)
 
@@ -380,8 +429,9 @@
     copy_prop("system_size", "partition_size")
     copy_prop("system_journal_size", "journal_size")
     copy_prop("system_verity_block_device", "verity_block_device")
-    copy_prop("system_root_image","system_root_image")
-    copy_prop("ramdisk_dir","ramdisk_dir")
+    copy_prop("system_root_image", "system_root_image")
+    copy_prop("ramdisk_dir", "ramdisk_dir")
+    copy_prop("has_ext4_reserved_blocks", "has_ext4_reserved_blocks")
     copy_prop("system_squashfs_compressor", "squashfs_compressor")
     copy_prop("system_squashfs_compressor_opt", "squashfs_compressor_opt")
   elif mount_point == "data":
@@ -397,10 +447,12 @@
     copy_prop("vendor_size", "partition_size")
     copy_prop("vendor_journal_size", "journal_size")
     copy_prop("vendor_verity_block_device", "verity_block_device")
+    copy_prop("has_ext4_reserved_blocks", "has_ext4_reserved_blocks")
   elif mount_point == "oem":
     copy_prop("fs_type", "fs_type")
     copy_prop("oem_size", "partition_size")
     copy_prop("oem_journal_size", "journal_size")
+    copy_prop("has_ext4_reserved_blocks", "has_ext4_reserved_blocks")
 
   return d
 
@@ -420,17 +472,19 @@
 
 
 def main(argv):
-  if len(argv) != 3:
+  if len(argv) != 4:
     print __doc__
     sys.exit(1)
 
   in_dir = argv[0]
   glob_dict_file = argv[1]
   out_file = argv[2]
+  target_out = argv[3]
 
   glob_dict = LoadGlobalDict(glob_dict_file)
   if "mount_point" in glob_dict:
-    # The caller knows the mount point and provides a dictionay needed by BuildImage().
+    # The caller knows the mount point and provides a dictionay needed by
+    # BuildImage().
     image_properties = glob_dict
   else:
     image_filename = os.path.basename(out_file)
@@ -451,7 +505,7 @@
 
     image_properties = ImagePropFromGlobalDict(glob_dict, mount_point)
 
-  if not BuildImage(in_dir, image_properties, out_file):
+  if not BuildImage(in_dir, image_properties, out_file, target_out):
     print >> sys.stderr, "error: failed to build %s from %s" % (out_file,
                                                                 in_dir)
     exit(1)
diff --git a/tools/releasetools/check_target_files_signatures.py b/tools/releasetools/check_target_files_signatures.py
index dd57033..5c541ab 100755
--- a/tools/releasetools/check_target_files_signatures.py
+++ b/tools/releasetools/check_target_files_signatures.py
@@ -331,7 +331,7 @@
 
     by_certpair = {}
 
-    for i in all:
+    for i in all_apks:
       if i in self.apks:
         if i in other.apks:
           # in both; should have same set of certs
diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index 592ed19..27b8f27 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -32,10 +32,7 @@
 import blockimgdiff
 import rangelib
 
-try:
-  from hashlib import sha1 as sha1
-except ImportError:
-  from sha import sha as sha1
+from hashlib import sha1 as sha1
 
 
 class Options(object):
@@ -52,11 +49,18 @@
     self.java_args = "-Xmx2048m" # JVM Args
     self.public_key_suffix = ".x509.pem"
     self.private_key_suffix = ".pk8"
+    # use otatools built boot_signer by default
+    self.boot_signer_path = "boot_signer"
+    self.boot_signer_args = []
+    self.verity_signer_path = None
+    self.verity_signer_args = []
     self.verbose = False
     self.tempfiles = []
     self.device_specific = None
     self.extras = {}
     self.info_dict = None
+    self.source_info_dict = None
+    self.target_info_dict = None
     self.worker_threads = None
 
 
@@ -200,12 +204,13 @@
 
 def LoadRecoveryFSTab(read_helper, fstab_version):
   class Partition(object):
-    def __init__(self, mount_point, fs_type, device, length, device2):
+    def __init__(self, mount_point, fs_type, device, length, device2, context):
       self.mount_point = mount_point
       self.fs_type = fs_type
       self.device = device
       self.length = length
       self.device2 = device2
+      self.context = context
 
   try:
     data = read_helper("RECOVERY/RAMDISK/etc/recovery.fstab")
@@ -254,6 +259,7 @@
       line = line.strip()
       if not line or line.startswith("#"):
         continue
+      # <src> <mnt_point> <type> <mnt_flags and options> <fs_mgr_flags>
       pieces = line.split()
       if len(pieces) != 5:
         raise ValueError("malformed recovery.fstab line: \"%s\"" % (line,))
@@ -273,9 +279,17 @@
           # Ignore all unknown options in the unified fstab
           continue
 
+      mount_flags = pieces[3]
+      # Honor the SELinux context if present.
+      context = None
+      for i in mount_flags.split(","):
+        if i.startswith("context="):
+          context = i
+
       mount_point = pieces[1]
       d[mount_point] = Partition(mount_point=mount_point, fs_type=pieces[2],
-                                 device=pieces[0], length=length, device2=None)
+                                 device=pieces[0], length=length,
+                                 device2=None, context=context)
 
   else:
     raise ValueError("Unknown fstab_version: \"%d\"" % (fstab_version,))
@@ -360,10 +374,14 @@
   assert p.returncode == 0, "mkbootimg of %s image failed" % (
       os.path.basename(sourcedir),)
 
-  if info_dict.get("verity_key", None):
+  if (info_dict.get("boot_signer", None) == "true" and
+      info_dict.get("verity_key", None)):
     path = "/" + os.path.basename(sourcedir).lower()
-    cmd = ["boot_signer", path, img.name, info_dict["verity_key"] + ".pk8",
-           info_dict["verity_key"] + ".x509.pem", img.name]
+    cmd = [OPTIONS.boot_signer_path]
+    cmd.extend(OPTIONS.boot_signer_args)
+    cmd.extend([path, img.name,
+                info_dict["verity_key"] + ".pk8",
+                info_dict["verity_key"] + ".x509.pem", img.name])
     p = Run(cmd, stdout=subprocess.PIPE)
     p.communicate()
     assert p.returncode == 0, "boot_signer of %s image failed" % path
@@ -380,6 +398,10 @@
     p.communicate()
     assert p.returncode == 0, "vboot_signer of %s image failed" % path
 
+    # Clean up the temp files.
+    img_unsigned.close()
+    img_keyblock.close()
+
   img.seek(os.SEEK_SET, 0)
   data = img.read()
 
@@ -540,7 +562,7 @@
     raise ExternalError("signapk.jar failed: return code %s" % (p.returncode,))
 
   if align:
-    p = Run(["zipalign", "-f", str(align), sign_name, output_name])
+    p = Run(["zipalign", "-f", "-p", str(align), sign_name, output_name])
     p.communicate()
     if p.returncode != 0:
       raise ExternalError("zipalign failed: return code %s" % (p.returncode,))
@@ -652,7 +674,9 @@
         argv, "hvp:s:x:" + extra_opts,
         ["help", "verbose", "path=", "signapk_path=", "extra_signapk_args=",
          "java_path=", "java_args=", "public_key_suffix=",
-         "private_key_suffix=", "device_specific=", "extra="] +
+         "private_key_suffix=", "boot_signer_path=", "boot_signer_args=",
+         "verity_signer_path=", "verity_signer_args=", "device_specific=",
+         "extra="] +
         list(extra_long_opts))
   except getopt.GetoptError as err:
     Usage(docstring)
@@ -679,6 +703,14 @@
       OPTIONS.public_key_suffix = a
     elif o in ("--private_key_suffix",):
       OPTIONS.private_key_suffix = a
+    elif o in ("--boot_signer_path",):
+      OPTIONS.boot_signer_path = a
+    elif o in ("--boot_signer_args",):
+      OPTIONS.boot_signer_args = shlex.split(a)
+    elif o in ("--verity_signer_path",):
+      OPTIONS.verity_signer_path = a
+    elif o in ("--verity_signer_args",):
+      OPTIONS.verity_signer_args = shlex.split(a)
     elif o in ("-s", "--device_specific"):
       OPTIONS.device_specific = a
     elif o in ("-x", "--extra"):
@@ -854,16 +886,55 @@
     zipfile.ZIP64_LIMIT = saved_zip64_limit
 
 
-def ZipWriteStr(zip_file, filename, data, perms=0o644, compression=None):
-  # use a fixed timestamp so the output is repeatable.
-  zinfo = zipfile.ZipInfo(filename=filename,
-                          date_time=(2009, 1, 1, 0, 0, 0))
-  if compression is None:
+def ZipWriteStr(zip_file, zinfo_or_arcname, data, perms=None,
+                compress_type=None):
+  """Wrap zipfile.writestr() function to work around the zip64 limit.
+
+  Even with the ZIP64_LIMIT workaround, it won't allow writing a string
+  longer than 2GiB. It gives 'OverflowError: size does not fit in an int'
+  when calling crc32(bytes).
+
+  But it still works fine to write a shorter string into a large zip file.
+  We should use ZipWrite() whenever possible, and only use ZipWriteStr()
+  when we know the string won't be too long.
+  """
+
+  saved_zip64_limit = zipfile.ZIP64_LIMIT
+  zipfile.ZIP64_LIMIT = (1 << 32) - 1
+
+  if not isinstance(zinfo_or_arcname, zipfile.ZipInfo):
+    zinfo = zipfile.ZipInfo(filename=zinfo_or_arcname)
     zinfo.compress_type = zip_file.compression
+    if perms is None:
+      perms = 0o644
   else:
-    zinfo.compress_type = compression
-  zinfo.external_attr = perms << 16
+    zinfo = zinfo_or_arcname
+
+  # If compress_type is given, it overrides the value in zinfo.
+  if compress_type is not None:
+    zinfo.compress_type = compress_type
+
+  # If perms is given, it has a priority.
+  if perms is not None:
+    zinfo.external_attr = perms << 16
+
+  # Use a fixed timestamp so the output is repeatable.
+  zinfo.date_time = (2009, 1, 1, 0, 0, 0)
+
   zip_file.writestr(zinfo, data)
+  zipfile.ZIP64_LIMIT = saved_zip64_limit
+
+
+def ZipClose(zip_file):
+  # http://b/18015246
+  # zipfile also refers to ZIP64_LIMIT during close() when it writes out the
+  # central directory.
+  saved_zip64_limit = zipfile.ZIP64_LIMIT
+  zipfile.ZIP64_LIMIT = (1 << 32) - 1
+
+  zip_file.close()
+
+  zipfile.ZIP64_LIMIT = saved_zip64_limit
 
 
 class DeviceSpecificParams(object):
@@ -969,7 +1040,7 @@
     return t
 
   def AddToZip(self, z, compression=None):
-    ZipWriteStr(z, self.name, self.data, compression=compression)
+    ZipWriteStr(z, self.name, self.data, compress_type=compression)
 
 DIFF_PROGRAM_BY_EXT = {
     ".gz" : "imgdiff",
@@ -1106,6 +1177,9 @@
     self.partition = partition
     self.check_first_block = check_first_block
 
+    # Due to http://b/20939131, check_first_block is disabled temporarily.
+    assert not self.check_first_block
+
     if version is None:
       version = 1
       if OPTIONS.info_dict:
@@ -1121,7 +1195,11 @@
     self.path = os.path.join(tmpdir, partition)
     b.Compute(self.path)
 
-    _, self.device = GetTypeAndDevice("/" + partition, OPTIONS.info_dict)
+    if src is None:
+      _, self.device = GetTypeAndDevice("/" + partition, OPTIONS.info_dict)
+    else:
+      _, self.device = GetTypeAndDevice("/" + partition,
+                                        OPTIONS.source_info_dict)
 
   def WriteScript(self, script, output_zip, progress=None):
     if not self.src:
@@ -1133,24 +1211,25 @@
     if progress:
       script.ShowProgress(progress, 0)
     self._WriteUpdate(script, output_zip)
+    self._WritePostInstallVerifyScript(script)
 
   def WriteVerifyScript(self, script):
     partition = self.partition
     if not self.src:
       script.Print("Image %s will be patched unconditionally." % (partition,))
     else:
+      ranges = self.src.care_map.subtract(self.src.clobbered_blocks)
+      ranges_str = ranges.to_string_raw()
       if self.version >= 3:
         script.AppendExtra(('if (range_sha1("%s", "%s") == "%s" || '
                             'block_image_verify("%s", '
                             'package_extract_file("%s.transfer.list"), '
                             '"%s.new.dat", "%s.patch.dat")) then') % (
-                            self.device, self.src.care_map.to_string_raw(),
-                            self.src.TotalSha1(),
+                            self.device, ranges_str, self.src.TotalSha1(),
                             self.device, partition, partition, partition))
       else:
         script.AppendExtra('if range_sha1("%s", "%s") == "%s" then' % (
-            self.device, self.src.care_map.to_string_raw(),
-            self.src.TotalSha1()))
+                           self.device, ranges_str, self.src.TotalSha1()))
       script.Print('Verified %s image...' % (partition,))
       script.AppendExtra('else')
 
@@ -1171,6 +1250,37 @@
       script.AppendExtra(('abort("%s partition has unexpected contents");\n'
                           'endif;') % (partition,))
 
+  def _WritePostInstallVerifyScript(self, script):
+    partition = self.partition
+    script.Print('Verifying the updated %s image...' % (partition,))
+    # Unlike pre-install verification, clobbered_blocks should not be ignored.
+    ranges = self.tgt.care_map
+    ranges_str = ranges.to_string_raw()
+    script.AppendExtra('if range_sha1("%s", "%s") == "%s" then' % (
+                       self.device, ranges_str,
+                       self.tgt.TotalSha1(include_clobbered_blocks=True)))
+
+    # Bug: 20881595
+    # Verify that extended blocks are really zeroed out.
+    if self.tgt.extended:
+      ranges_str = self.tgt.extended.to_string_raw()
+      script.AppendExtra('if range_sha1("%s", "%s") == "%s" then' % (
+                         self.device, ranges_str,
+                         self._HashZeroBlocks(self.tgt.extended.size())))
+      script.Print('Verified the updated %s image.' % (partition,))
+      script.AppendExtra(
+          'else\n'
+          '  abort("%s partition has unexpected non-zero contents after OTA '
+          'update");\n'
+          'endif;' % (partition,))
+    else:
+      script.Print('Verified the updated %s image.' % (partition,))
+
+    script.AppendExtra(
+        'else\n'
+        '  abort("%s partition has unexpected contents after OTA update");\n'
+        'endif;' % (partition,))
+
   def _WriteUpdate(self, script, output_zip):
     ZipWrite(output_zip,
              '{}.transfer.list'.format(self.path),
@@ -1198,6 +1308,18 @@
 
     return ctx.hexdigest()
 
+  def _HashZeroBlocks(self, num_blocks): # pylint: disable=no-self-use
+    """Return the hash value for all zero blocks."""
+    zero_block = '\x00' * 4096
+    ctx = sha1()
+    for _ in range(num_blocks):
+      ctx.update(zero_block)
+
+    return ctx.hexdigest()
+
+  # TODO(tbao): Due to http://b/20939131, block 0 may be changed without
+  # remounting R/W. Will change the checking to a finer-grained way to
+  # mask off those bits.
   def _CheckFirstBlock(self, script):
     r = rangelib.RangeSet((0, 1))
     srchash = self._HashBlocks(self.src, r)
@@ -1275,6 +1397,8 @@
   output_sink("recovery-from-boot.p", patch)
 
   try:
+    # The following GetTypeAndDevice()s need to use the path in the target
+    # info_dict instead of source_info_dict.
     boot_type, boot_device = GetTypeAndDevice("/boot", info_dict)
     recovery_type, recovery_device = GetTypeAndDevice("/recovery", info_dict)
   except KeyError:
diff --git a/tools/releasetools/edify_generator.py b/tools/releasetools/edify_generator.py
index 3d0da88..a52e328 100644
--- a/tools/releasetools/edify_generator.py
+++ b/tools/releasetools/edify_generator.py
@@ -20,11 +20,15 @@
   """Class to generate scripts in the 'edify' recovery script language
   used from donut onwards."""
 
-  def __init__(self, version, info):
+  def __init__(self, version, info, fstab=None):
     self.script = []
     self.mounts = set()
     self.version = version
     self.info = info
+    if fstab is None:
+      self.fstab = self.info.get("fstab", None)
+    else:
+      self.fstab = fstab
 
   def MakeTemporary(self):
     """Make a temporary script object whose commands can latter be
@@ -168,7 +172,7 @@
       where option is optname[=optvalue]
       E.g. ext4=barrier=1,nodelalloc,errors=panic|f2fs=errors=recover
     """
-    fstab = self.info.get("fstab", None)
+    fstab = self.fstab
     if fstab:
       p = fstab[mount_point]
       mount_dict = {}
@@ -177,9 +181,12 @@
           if "=" in option:
             key, value = option.split("=", 1)
             mount_dict[key] = value
+      mount_flags = mount_dict.get(p.fs_type, "")
+      if p.context is not None:
+        mount_flags = p.context + ("," + mount_flags if mount_flags else "")
       self.script.append('mount("%s", "%s", "%s", "%s", "%s");' % (
           p.fs_type, common.PARTITION_TYPES[p.fs_type], p.device,
-          p.mount_point, mount_dict.get(p.fs_type, "")))
+          p.mount_point, mount_flags))
       self.mounts.add(p.mount_point)
 
   def UnpackPackageDir(self, src, dst):
@@ -199,7 +206,7 @@
     self.script.append('ui_print("%s");' % (message,))
 
   def TunePartition(self, partition, *options):
-    fstab = self.info.get("fstab", None)
+    fstab = self.fstab
     if fstab:
       p = fstab[partition]
       if p.fs_type not in ("ext2", "ext3", "ext4"):
@@ -213,7 +220,7 @@
     """Format the given partition, specified by its mount point (eg,
     "/system")."""
 
-    fstab = self.info.get("fstab", None)
+    fstab = self.fstab
     if fstab:
       p = fstab[partition]
       self.script.append('format("%s", "%s", "%s", "%s", "%s");' %
@@ -223,7 +230,7 @@
   def WipeBlockDevice(self, partition):
     if partition not in ("/system", "/vendor"):
       raise ValueError(("WipeBlockDevice doesn't work on %s\n") % (partition,))
-    fstab = self.info.get("fstab", None)
+    fstab = self.fstab
     size = self.info.get(partition.lstrip("/") + "_size", None)
     device = fstab[partition].device
 
@@ -236,6 +243,15 @@
     cmd = "delete(" + ",\0".join(['"%s"' % (i,) for i in file_list]) + ");"
     self.script.append(self.WordWrap(cmd))
 
+  def DeleteFilesIfNotMatching(self, file_list):
+    """Delete the file in file_list if not matching the checksum."""
+    if not file_list:
+      return
+    for name, sha1 in file_list:
+      cmd = ('sha1_check(read_file("{name}"), "{sha1}") || '
+             'delete("{name}");'.format(name=name, sha1=sha1))
+      self.script.append(self.WordWrap(cmd))
+
   def RenameFile(self, srcfile, tgtfile):
     """Moves a file from one location to another."""
     if self.info.get("update_rename_support", False):
@@ -247,7 +263,7 @@
     """Prepend an action with an apply_patch_check in order to
        skip the action if the file exists.  Used when a patch
        is later renamed."""
-    cmd = ('sha1_check(read_file("%s"), %s) || ' % (tgtfile, tgtsha1))
+    cmd = ('sha1_check(read_file("%s"), %s) ||' % (tgtfile, tgtsha1))
     self.script.append(self.WordWrap(cmd))
 
   def ApplyPatch(self, srcfile, tgtfile, tgtsize, tgtsha1, *patchpairs):
@@ -268,7 +284,7 @@
     """Write the given package file into the partition for the given
     mount point."""
 
-    fstab = self.info["fstab"]
+    fstab = self.fstab
     if fstab:
       p = fstab[mount_point]
       partition_type = common.PARTITION_TYPES[p.fs_type]
diff --git a/tools/releasetools/img_from_target_files.py b/tools/releasetools/img_from_target_files.py
index 8c5acd8..c486992 100755
--- a/tools/releasetools/img_from_target_files.py
+++ b/tools/releasetools/img_from_target_files.py
@@ -43,8 +43,9 @@
 
 def CopyInfo(output_zip):
   """Copy the android-info.txt file from the input to the output."""
-  output_zip.write(os.path.join(OPTIONS.input_tmp, "OTA", "android-info.txt"),
-                   "android-info.txt")
+  common.ZipWrite(
+      output_zip, os.path.join(OPTIONS.input_tmp, "OTA", "android-info.txt"),
+      "android-info.txt")
 
 
 def main(argv):
@@ -133,13 +134,7 @@
 
   finally:
     print "cleaning up..."
-    # http://b/18015246
-    # See common.py for context.  zipfile also refers to ZIP64_LIMIT during
-    # close() when it writes out the central directory.
-    saved_zip64_limit = zipfile.ZIP64_LIMIT
-    zipfile.ZIP64_LIMIT = (1 << 32) - 1
-    output_zip.close()
-    zipfile.ZIP64_LIMIT = saved_zip64_limit
+    common.ZipClose(output_zip)
     shutil.rmtree(OPTIONS.input_tmp)
 
   print "done."
diff --git a/tools/releasetools/ota_from_target_files.py b/tools/releasetools/ota_from_target_files.py
index eab3daa..c6fd47e 100755
--- a/tools/releasetools/ota_from_target_files.py
+++ b/tools/releasetools/ota_from_target_files.py
@@ -42,6 +42,11 @@
       radio image. This option is only meaningful when -i is specified,
       because a full radio is always included in a full OTA if applicable.
 
+ --full_bootloader
+      When generating an incremental OTA, always include a full copy of
+      bootloader image. This option is only meaningful when -i is specified,
+      because a full bootloader is always included in a full OTA if applicable.
+
   -v  (--verify)
       Remount and verify the checksums of the files written to the
       system and vendor (if used) partitions.  Incremental builds only.
@@ -92,7 +97,6 @@
   print >> sys.stderr, "Python 2.7 or newer is required."
   sys.exit(1)
 
-import copy
 import multiprocessing
 import os
 import tempfile
@@ -123,6 +127,7 @@
 OPTIONS.oem_source = None
 OPTIONS.fallback_to_full = True
 OPTIONS.full_radio = False
+OPTIONS.full_bootloader = False
 
 def MostPopularKey(d, default):
   """Given a dict, return the key corresponding to the largest
@@ -371,6 +376,7 @@
         symlinks.append((input_zip.read(info.filename),
                          "/" + partition + "/" + basefilename))
       else:
+        import copy
         info2 = copy.copy(info)
         fn = info2.filename = partition + "/" + basefilename
         if substitute and fn in substitute and substitute[fn] is None:
@@ -380,7 +386,7 @@
             data = substitute[fn]
           else:
             data = input_zip.read(info.filename)
-          output_zip.writestr(info2, data)
+          common.ZipWriteStr(output_zip, info2, data)
         if fn.endswith("/"):
           itemset.Get(fn[:-1], is_dir=True)
         else:
@@ -475,13 +481,20 @@
       path = add_img_to_target_files.BuildVendor(
           tmpdir, info_dict, block_list=mappath)
 
-  return sparse_img.SparseImage(path, mappath)
+  # Bug: http://b/20939131
+  # In ext4 filesystems, block 0 might be changed even being mounted
+  # R/O. We add it to clobbered_blocks so that it will be written to the
+  # target unconditionally. Note that they are still part of care_map.
+  clobbered_blocks = "0"
+
+  return sparse_img.SparseImage(path, mappath, clobbered_blocks)
 
 
 def WriteFullOTAPackage(input_zip, output_zip):
   # TODO: how to determine this?  We don't know what version it will
-  # be installed on top of.  For now, we expect the API just won't
-  # change very often.
+  # be installed on top of. For now, we expect the API just won't
+  # change very often. Similarly for fstab, it might have changed
+  # in the target build.
   script = edify_generator.EdifyGenerator(3, OPTIONS.info_dict)
 
   oem_props = OPTIONS.info_dict.get("oem_fingerprint_properties")
@@ -721,8 +734,9 @@
   if source_version == 0:
     print ("WARNING: generating edify script for a source that "
            "can't install it.")
-  script = edify_generator.EdifyGenerator(source_version,
-                                          OPTIONS.target_info_dict)
+  script = edify_generator.EdifyGenerator(
+      source_version, OPTIONS.target_info_dict,
+      fstab=OPTIONS.source_info_dict["fstab"])
 
   metadata = {
       "pre-device": GetBuildProp("ro.product.device",
@@ -739,7 +753,7 @@
       output_zip=output_zip,
       script=script,
       metadata=metadata,
-      info_dict=OPTIONS.info_dict)
+      info_dict=OPTIONS.source_info_dict)
 
   # TODO: Currently this works differently from WriteIncrementalOTAPackage().
   # This function doesn't consider thumbprints when writing
@@ -773,7 +787,6 @@
         OPTIONS.info_dict.get("blockimgdiff_versions", "1").split(","))
 
   system_diff = common.BlockDifference("system", system_tgt, system_src,
-                                       check_first_block=True,
                                        version=blockimgdiff_version)
 
   if HasVendorPartition(target_zip):
@@ -784,13 +797,12 @@
     vendor_tgt = GetImage("vendor", OPTIONS.target_tmp,
                           OPTIONS.target_info_dict)
     vendor_diff = common.BlockDifference("vendor", vendor_tgt, vendor_src,
-                                         check_first_block=True,
                                          version=blockimgdiff_version)
   else:
     vendor_diff = None
 
   oem_props = OPTIONS.target_info_dict.get("oem_fingerprint_properties")
-  recovery_mount_options = OPTIONS.target_info_dict.get(
+  recovery_mount_options = OPTIONS.source_info_dict.get(
       "recovery_mount_options")
   oem_dict = None
   if oem_props is not None and len(oem_props) > 0:
@@ -826,9 +838,9 @@
   #    (allow recovery to mark itself finished and reboot)
 
   if OPTIONS.two_step:
-    if not OPTIONS.info_dict.get("multistage_support", None):
+    if not OPTIONS.source_info_dict.get("multistage_support", None):
       assert False, "two-step packages not supported by this build"
-    fs = OPTIONS.info_dict["fstab"]["/misc"]
+    fs = OPTIONS.source_info_dict["fstab"]["/misc"]
     assert fs.fs_type.upper() == "EMMC", \
         "two-step packages only supported on devices with EMMC /misc partitions"
     bcb_dev = {"bcb_dev": fs.device}
@@ -873,7 +885,8 @@
           GetBuildProp("ro.build.thumbprint", OPTIONS.source_info_dict))
 
   if updating_boot:
-    boot_type, boot_device = common.GetTypeAndDevice("/boot", OPTIONS.info_dict)
+    boot_type, boot_device = common.GetTypeAndDevice(
+        "/boot", OPTIONS.source_info_dict)
     d = common.Difference(target_boot, source_boot)
     _, _, d = d.ComputePatch()
     if d is None:
@@ -1110,11 +1123,13 @@
   if source_version == 0:
     print ("WARNING: generating edify script for a source that "
            "can't install it.")
-  script = edify_generator.EdifyGenerator(source_version,
-                                          OPTIONS.target_info_dict)
+  script = edify_generator.EdifyGenerator(
+      source_version, OPTIONS.target_info_dict,
+      fstab=OPTIONS.source_info_dict["fstab"])
 
   oem_props = OPTIONS.info_dict.get("oem_fingerprint_properties")
-  recovery_mount_options = OPTIONS.info_dict.get("recovery_mount_options")
+  recovery_mount_options = OPTIONS.source_info_dict.get(
+      "recovery_mount_options")
   oem_dict = None
   if oem_props is not None and len(oem_props) > 0:
     if OPTIONS.oem_source is None:
@@ -1138,7 +1153,7 @@
       output_zip=output_zip,
       script=script,
       metadata=metadata,
-      info_dict=OPTIONS.info_dict)
+      info_dict=OPTIONS.source_info_dict)
 
   system_diff = FileDifference("system", source_zip, target_zip, output_zip)
   script.Mount("/system", recovery_mount_options)
@@ -1210,9 +1225,9 @@
   #    (allow recovery to mark itself finished and reboot)
 
   if OPTIONS.two_step:
-    if not OPTIONS.info_dict.get("multistage_support", None):
+    if not OPTIONS.source_info_dict.get("multistage_support", None):
       assert False, "two-step packages not supported by this build"
-    fs = OPTIONS.info_dict["fstab"]["/misc"]
+    fs = OPTIONS.source_info_dict["fstab"]["/misc"]
     assert fs.fs_type.upper() == "EMMC", \
         "two-step packages only supported on devices with EMMC /misc partitions"
     bcb_dev = {"bcb_dev": fs.device}
@@ -1249,7 +1264,8 @@
 
     common.ZipWriteStr(output_zip, "patch/boot.img.p", d)
 
-    boot_type, boot_device = common.GetTypeAndDevice("/boot", OPTIONS.info_dict)
+    boot_type, boot_device = common.GetTypeAndDevice(
+        "/boot", OPTIONS.source_info_dict)
 
     script.PatchCheck("%s:%s:%d:%s:%d:%s" %
                       (boot_type, boot_device,
@@ -1374,11 +1390,36 @@
   # Delete all the symlinks in source that aren't in target.  This
   # needs to happen before verbatim files are unpacked, in case a
   # symlink in the source is replaced by a real file in the target.
-  to_delete = []
+
+  # If a symlink in the source will be replaced by a regular file, we cannot
+  # delete the symlink/file in case the package gets applied again. For such
+  # a symlink, we prepend a sha1_check() to detect if it has been updated.
+  # (Bug: 23646151)
+  replaced_symlinks = dict()
+  if system_diff:
+    for i in system_diff.verbatim_targets:
+      replaced_symlinks["/%s" % (i[0],)] = i[2]
+  if vendor_diff:
+    for i in vendor_diff.verbatim_targets:
+      replaced_symlinks["/%s" % (i[0],)] = i[2]
+
+  if system_diff:
+    for tf in system_diff.renames.values():
+      replaced_symlinks["/%s" % (tf.name,)] = tf.sha1
+  if vendor_diff:
+    for tf in vendor_diff.renames.values():
+      replaced_symlinks["/%s" % (tf.name,)] = tf.sha1
+
+  always_delete = []
+  may_delete = []
   for dest, link in source_symlinks:
     if link not in target_symlinks_d:
-      to_delete.append(link)
-  script.DeleteFiles(to_delete)
+      if link in replaced_symlinks:
+        may_delete.append((link, replaced_symlinks[link]))
+      else:
+        always_delete.append(link)
+  script.DeleteFiles(always_delete)
+  script.DeleteFilesIfNotMatching(may_delete)
 
   if system_diff.verbatim_targets:
     script.Print("Unpacking new system files...")
@@ -1464,6 +1505,8 @@
       OPTIONS.incremental_source = a
     elif o == "--full_radio":
       OPTIONS.full_radio = True
+    elif o == "--full_bootloader":
+      OPTIONS.full_bootloader = True
     elif o in ("-w", "--wipe_user_data"):
       OPTIONS.wipe_user_data = True
     elif o in ("-n", "--no_prereq"):
@@ -1506,6 +1549,7 @@
                                  "package_key=",
                                  "incremental_from=",
                                  "full_radio",
+                                 "full_bootloader",
                                  "wipe_user_data",
                                  "no_prereq",
                                  "extra_script=",
@@ -1581,6 +1625,7 @@
         OPTIONS.package_key = OPTIONS.info_dict.get(
             "default_system_dev_certificate",
             "build/target/product/security/testkey")
+      common.ZipClose(output_zip)
       break
 
     else:
@@ -1601,15 +1646,14 @@
         common.DumpInfoDict(OPTIONS.source_info_dict)
       try:
         WriteIncrementalOTAPackage(input_zip, source_zip, output_zip)
+        common.ZipClose(output_zip)
         break
       except ValueError:
         if not OPTIONS.fallback_to_full:
           raise
         print "--- failed to build incremental; falling back to full ---"
         OPTIONS.incremental_source = None
-        output_zip.close()
-
-  output_zip.close()
+        common.ZipClose(output_zip)
 
   if not OPTIONS.no_signing:
     SignOutput(temp_zip_file.name, args[1])
diff --git a/tools/releasetools/rangelib.py b/tools/releasetools/rangelib.py
index 8b327fe..1506658 100644
--- a/tools/releasetools/rangelib.py
+++ b/tools/releasetools/rangelib.py
@@ -238,6 +238,28 @@
         out.append(offset + p - start)
     return RangeSet(data=out)
 
+  def extend(self, n):
+    """Extend the RangeSet by 'n' blocks.
+
+    The lower bound is guaranteed to be non-negative.
+
+    >>> RangeSet("0-9").extend(1)
+    <RangeSet("0-10")>
+    >>> RangeSet("10-19").extend(15)
+    <RangeSet("0-34")>
+    >>> RangeSet("10-19 30-39").extend(4)
+    <RangeSet("6-23 26-43")>
+    >>> RangeSet("10-19 30-39").extend(10)
+    <RangeSet("0-49")>
+    """
+    out = self
+    for i in range(0, len(self.data), 2):
+      s, e = self.data[i:i+2]
+      s1 = max(0, s - n)
+      e1 = e + n
+      out = out.union(RangeSet(str(s1) + "-" + str(e1-1)))
+    return out
+
 
 if __name__ == "__main__":
   import doctest
diff --git a/tools/releasetools/sign_target_files_apks.py b/tools/releasetools/sign_target_files_apks.py
index d47cc4f..60d62c2 100755
--- a/tools/releasetools/sign_target_files_apks.py
+++ b/tools/releasetools/sign_target_files_apks.py
@@ -196,23 +196,25 @@
       if key not in common.SPECIAL_CERT_STRINGS:
         print "    signing: %-*s (%s)" % (maxsize, name, key)
         signed_data = SignApk(data, key, key_passwords[key])
-        output_tf_zip.writestr(out_info, signed_data)
+        common.ZipWriteStr(output_tf_zip, out_info, signed_data)
       else:
         # an APK we're not supposed to sign.
         print "NOT signing: %s" % (name,)
-        output_tf_zip.writestr(out_info, data)
+        common.ZipWriteStr(output_tf_zip, out_info, data)
     elif info.filename in ("SYSTEM/build.prop",
                            "VENDOR/build.prop",
+                           "BOOT/RAMDISK/default.prop",
                            "RECOVERY/RAMDISK/default.prop"):
       print "rewriting %s:" % (info.filename,)
       new_data = RewriteProps(data, misc_info)
-      output_tf_zip.writestr(out_info, new_data)
-      if info.filename == "RECOVERY/RAMDISK/default.prop":
+      common.ZipWriteStr(output_tf_zip, out_info, new_data)
+      if info.filename in ("BOOT/RAMDISK/default.prop",
+                           "RECOVERY/RAMDISK/default.prop"):
         write_to_temp(info.filename, info.external_attr, new_data)
     elif info.filename.endswith("mac_permissions.xml"):
       print "rewriting %s with new keys." % (info.filename,)
       new_data = ReplaceCerts(data)
-      output_tf_zip.writestr(out_info, new_data)
+      common.ZipWriteStr(output_tf_zip, out_info, new_data)
     elif info.filename in ("SYSTEM/recovery-from-boot.p",
                            "SYSTEM/bin/install-recovery.sh"):
       rebuild_recovery = True
@@ -229,7 +231,7 @@
       pass
     else:
       # a non-APK file; copy it verbatim
-      output_tf_zip.writestr(out_info, data)
+      common.ZipWriteStr(output_tf_zip, out_info, data)
 
   if OPTIONS.replace_ota_keys:
     new_recovery_keys = ReplaceOtaKeys(input_tf_zip, output_tf_zip, misc_info)
@@ -243,7 +245,7 @@
         "boot.img", "boot.img", tmpdir, "BOOT", info_dict=misc_info)
 
     def output_sink(fn, data):
-      output_tf_zip.writestr("SYSTEM/"+fn, data)
+      common.ZipWriteStr(output_tf_zip, "SYSTEM/" + fn, data)
 
     common.MakeRecoveryPatch(tmpdir, output_sink, recovery_img, boot_img,
                              info_dict=misc_info)
@@ -310,6 +312,10 @@
         pieces = value.split("/")
         pieces[-1] = EditTags(pieces[-1])
         value = "/".join(pieces)
+      elif key == "ro.bootimage.build.fingerprint":
+        pieces = value.split("/")
+        pieces[-1] = EditTags(pieces[-1])
+        value = "/".join(pieces)
       elif key == "ro.build.description":
         pieces = value.split(" ")
         assert len(pieces) == 5
@@ -488,8 +494,8 @@
   ProcessTargetFiles(input_zip, output_zip, misc_info,
                      apk_key_map, key_passwords)
 
-  input_zip.close()
-  output_zip.close()
+  common.ZipClose(input_zip)
+  common.ZipClose(output_zip)
 
   add_img_to_target_files.AddImagesToTargetFiles(args[1])
 
diff --git a/tools/releasetools/sparse_img.py b/tools/releasetools/sparse_img.py
index 78f3057..07f3c1c 100644
--- a/tools/releasetools/sparse_img.py
+++ b/tools/releasetools/sparse_img.py
@@ -21,10 +21,17 @@
 
 
 class SparseImage(object):
-  """Wraps a sparse image file (and optional file map) into an image
-  object suitable for passing to BlockImageDiff."""
+  """Wraps a sparse image file into an image object.
 
-  def __init__(self, simg_fn, file_map_fn=None):
+  Wraps a sparse image file (and optional file map and clobbered_blocks) into
+  an image object suitable for passing to BlockImageDiff. file_map contains
+  the mapping between files and their blocks. clobbered_blocks contains the set
+  of blocks that should be always written to the target regardless of the old
+  contents (i.e. copying instead of patching). clobbered_blocks should be in
+  the form of a string like "0" or "0 1-5 8".
+  """
+
+  def __init__(self, simg_fn, file_map_fn=None, clobbered_blocks=None):
     self.simg_f = f = open(simg_fn, "rb")
 
     header_bin = f.read(28)
@@ -57,6 +64,7 @@
     pos = 0   # in blocks
     care_data = []
     self.offset_map = offset_map = []
+    self.clobbered_blocks = rangelib.RangeSet(data=clobbered_blocks)
 
     for i in range(total_chunks):
       header_bin = f.read(12)
@@ -102,18 +110,35 @@
     self.care_map = rangelib.RangeSet(care_data)
     self.offset_index = [i[0] for i in offset_map]
 
+    # Bug: 20881595
+    # Introduce extended blocks as a workaround for the bug. dm-verity may
+    # touch blocks that are not in the care_map due to block device
+    # read-ahead. It will fail if such blocks contain non-zeroes. We zero out
+    # the extended blocks explicitly to avoid dm-verity failures. 512 blocks
+    # are the maximum read-ahead we configure for dm-verity block devices.
+    extended = self.care_map.extend(512)
+    all_blocks = rangelib.RangeSet(data=(0, self.total_blocks))
+    extended = extended.intersect(all_blocks).subtract(self.care_map)
+    self.extended = extended
+
     if file_map_fn:
-      self.LoadFileBlockMap(file_map_fn)
+      self.LoadFileBlockMap(file_map_fn, self.clobbered_blocks)
     else:
       self.file_map = {"__DATA": self.care_map}
 
   def ReadRangeSet(self, ranges):
     return [d for d in self._GetRangeData(ranges)]
 
-  def TotalSha1(self):
-    """Return the SHA-1 hash of all data in the 'care' regions of this image."""
+  def TotalSha1(self, include_clobbered_blocks=False):
+    """Return the SHA-1 hash of all data in the 'care' regions.
+
+    If include_clobbered_blocks is True, it returns the hash including the
+    clobbered_blocks."""
+    ranges = self.care_map
+    if not include_clobbered_blocks:
+      ranges = ranges.subtract(self.clobbered_blocks)
     h = sha1()
-    for d in self._GetRangeData(self.care_map):
+    for d in self._GetRangeData(ranges):
       h.update(d)
     return h.hexdigest()
 
@@ -156,7 +181,7 @@
           yield fill_data * (this_read * (self.blocksize >> 2))
         to_read -= this_read
 
-  def LoadFileBlockMap(self, fn):
+  def LoadFileBlockMap(self, fn, clobbered_blocks):
     remaining = self.care_map
     self.file_map = out = {}
 
@@ -166,14 +191,20 @@
         ranges = rangelib.RangeSet.parse(ranges)
         out[fn] = ranges
         assert ranges.size() == ranges.intersect(remaining).size()
+
+        # Currently we assume that blocks in clobbered_blocks are not part of
+        # any file.
+        assert not clobbered_blocks.overlaps(ranges)
         remaining = remaining.subtract(ranges)
 
+    remaining = remaining.subtract(clobbered_blocks)
+
     # For all the remaining blocks in the care_map (ie, those that
-    # aren't part of the data for any file), divide them into blocks
-    # that are all zero and blocks that aren't.  (Zero blocks are
-    # handled specially because (1) there are usually a lot of them
-    # and (2) bsdiff handles files with long sequences of repeated
-    # bytes especially poorly.)
+    # aren't part of the data for any file nor part of the clobbered_blocks),
+    # divide them into blocks that are all zero and blocks that aren't.
+    # (Zero blocks are handled specially because (1) there are usually
+    # a lot of them and (2) bsdiff handles files with long sequences of
+    # repeated bytes especially poorly.)
 
     zero_blocks = []
     nonzero_blocks = []
@@ -201,12 +232,14 @@
           nonzero_blocks.append(b)
           nonzero_blocks.append(b+1)
 
-    assert zero_blocks or nonzero_blocks
+    assert zero_blocks or nonzero_blocks or clobbered_blocks
 
     if zero_blocks:
       out["__ZERO"] = rangelib.RangeSet(data=zero_blocks)
     if nonzero_blocks:
       out["__NONZERO"] = rangelib.RangeSet(data=nonzero_blocks)
+    if clobbered_blocks:
+      out["__COPY"] = clobbered_blocks
 
   def ResetFileMap(self):
     """Throw away the file map and treat the entire image as
diff --git a/tools/releasetools/test_common.py b/tools/releasetools/test_common.py
index 5fdc132..a861346 100644
--- a/tools/releasetools/test_common.py
+++ b/tools/releasetools/test_common.py
@@ -29,15 +29,54 @@
     data[begin:end] = os.urandom(block_size)
   return "".join(data)
 
+def get_2gb_string():
+  kilobytes = 1024
+  megabytes = 1024 * kilobytes
+  gigabytes = 1024 * megabytes
+
+  size = int(2 * gigabytes + 1)
+  block_size = 4 * kilobytes
+  step_size = 4 * megabytes
+  two_gb_string = random_string_with_holes(
+        size, block_size, step_size)
+  return two_gb_string
+
 
 class CommonZipTest(unittest.TestCase):
+  def _verify(self, zip_file, zip_file_name, arcname, contents,
+              test_file_name=None, expected_stat=None, expected_mode=0o644,
+              expected_compress_type=zipfile.ZIP_STORED):
+    # Verify the stat if present.
+    if test_file_name is not None:
+      new_stat = os.stat(test_file_name)
+      self.assertEqual(int(expected_stat.st_mode), int(new_stat.st_mode))
+      self.assertEqual(int(expected_stat.st_mtime), int(new_stat.st_mtime))
+
+    # Reopen the zip file to verify.
+    zip_file = zipfile.ZipFile(zip_file_name, "r")
+
+    # Verify the timestamp.
+    info = zip_file.getinfo(arcname)
+    self.assertEqual(info.date_time, (2009, 1, 1, 0, 0, 0))
+
+    # Verify the file mode.
+    mode = (info.external_attr >> 16) & 0o777
+    self.assertEqual(mode, expected_mode)
+
+    # Verify the compress type.
+    self.assertEqual(info.compress_type, expected_compress_type)
+
+    # Verify the zip contents.
+    self.assertEqual(zip_file.read(arcname), contents)
+    self.assertIsNone(zip_file.testzip())
+
   def _test_ZipWrite(self, contents, extra_zipwrite_args=None):
     extra_zipwrite_args = dict(extra_zipwrite_args or {})
 
     test_file = tempfile.NamedTemporaryFile(delete=False)
-    zip_file = tempfile.NamedTemporaryFile(delete=False)
-
     test_file_name = test_file.name
+
+    zip_file = tempfile.NamedTemporaryFile(delete=False)
     zip_file_name = zip_file.name
 
     # File names within an archive strip the leading slash.
@@ -52,31 +91,103 @@
       test_file.write(contents)
       test_file.close()
 
-      old_stat = os.stat(test_file_name)
+      expected_stat = os.stat(test_file_name)
       expected_mode = extra_zipwrite_args.get("perms", 0o644)
-
+      expected_compress_type = extra_zipwrite_args.get("compress_type",
+                                                       zipfile.ZIP_STORED)
       time.sleep(5)  # Make sure the atime/mtime will change measurably.
 
       common.ZipWrite(zip_file, test_file_name, **extra_zipwrite_args)
+      common.ZipClose(zip_file)
 
-      new_stat = os.stat(test_file_name)
-      self.assertEqual(int(old_stat.st_mode), int(new_stat.st_mode))
-      self.assertEqual(int(old_stat.st_mtime), int(new_stat.st_mtime))
-      self.assertIsNone(zip_file.testzip())
-
-      zip_file.close()
-      zip_file = zipfile.ZipFile(zip_file_name, "r")
-      info = zip_file.getinfo(arcname)
-
-      self.assertEqual(info.date_time, (2009, 1, 1, 0, 0, 0))
-      mode = (info.external_attr >> 16) & 0o777
-      self.assertEqual(mode, expected_mode)
-      self.assertEqual(zip_file.read(arcname), contents)
-      self.assertIsNone(zip_file.testzip())
+      self._verify(zip_file, zip_file_name, arcname, contents, test_file_name,
+                   expected_stat, expected_mode, expected_compress_type)
     finally:
       os.remove(test_file_name)
       os.remove(zip_file_name)
 
+  def _test_ZipWriteStr(self, zinfo_or_arcname, contents, extra_args=None):
+    extra_args = dict(extra_args or {})
+
+    zip_file = tempfile.NamedTemporaryFile(delete=False)
+    zip_file_name = zip_file.name
+    zip_file.close()
+
+    zip_file = zipfile.ZipFile(zip_file_name, "w")
+
+    try:
+      expected_compress_type = extra_args.get("compress_type",
+                                              zipfile.ZIP_STORED)
+      time.sleep(5)  # Make sure the atime/mtime will change measurably.
+
+      if not isinstance(zinfo_or_arcname, zipfile.ZipInfo):
+        arcname = zinfo_or_arcname
+        expected_mode = extra_args.get("perms", 0o644)
+      else:
+        arcname = zinfo_or_arcname.filename
+        expected_mode = extra_args.get("perms",
+                                       zinfo_or_arcname.external_attr >> 16)
+
+      common.ZipWriteStr(zip_file, zinfo_or_arcname, contents, **extra_args)
+      common.ZipClose(zip_file)
+
+      self._verify(zip_file, zip_file_name, arcname, contents,
+                   expected_mode=expected_mode,
+                   expected_compress_type=expected_compress_type)
+    finally:
+      os.remove(zip_file_name)
+
+  def _test_ZipWriteStr_large_file(self, large, small, extra_args=None):
+    extra_args = dict(extra_args or {})
+
+    zip_file = tempfile.NamedTemporaryFile(delete=False)
+    zip_file_name = zip_file.name
+
+    test_file = tempfile.NamedTemporaryFile(delete=False)
+    test_file_name = test_file.name
+
+    arcname_large = test_file_name
+    arcname_small = "bar"
+
+    # File names within an archive strip the leading slash.
+    if arcname_large[0] == "/":
+      arcname_large = arcname_large[1:]
+
+    zip_file.close()
+    zip_file = zipfile.ZipFile(zip_file_name, "w")
+
+    try:
+      test_file.write(large)
+      test_file.close()
+
+      expected_stat = os.stat(test_file_name)
+      expected_mode = 0o644
+      expected_compress_type = extra_args.get("compress_type",
+                                              zipfile.ZIP_STORED)
+      time.sleep(5)  # Make sure the atime/mtime will change measurably.
+
+      common.ZipWrite(zip_file, test_file_name, **extra_args)
+      common.ZipWriteStr(zip_file, arcname_small, small, **extra_args)
+      common.ZipClose(zip_file)
+
+      # Verify the contents written by ZipWrite().
+      self._verify(zip_file, zip_file_name, arcname_large, large,
+                   test_file_name, expected_stat, expected_mode,
+                   expected_compress_type)
+
+      # Verify the contents written by ZipWriteStr().
+      self._verify(zip_file, zip_file_name, arcname_small, small,
+                   expected_compress_type=expected_compress_type)
+    finally:
+      os.remove(zip_file_name)
+      os.remove(test_file_name)
+
+  def _test_reset_ZIP64_LIMIT(self, func, *args):
+    default_limit = (1 << 31) - 1
+    self.assertEqual(default_limit, zipfile.ZIP64_LIMIT)
+    func(*args)
+    self.assertEqual(default_limit, zipfile.ZIP64_LIMIT)
+
   def test_ZipWrite(self):
     file_contents = os.urandom(1024)
     self._test_ZipWrite(file_contents)
@@ -88,23 +199,99 @@
         "perms": 0o777,
         "compress_type": zipfile.ZIP_DEFLATED,
     })
+    self._test_ZipWrite(file_contents, {
+        "arcname": "foobar",
+        "perms": 0o700,
+        "compress_type": zipfile.ZIP_STORED,
+    })
 
   def test_ZipWrite_large_file(self):
-    kilobytes = 1024
-    megabytes = 1024 * kilobytes
-    gigabytes = 1024 * megabytes
-
-    size = int(2 * gigabytes + 1)
-    block_size = 4 * kilobytes
-    step_size = 4 * megabytes
-    file_contents = random_string_with_holes(
-        size, block_size, step_size)
+    file_contents = get_2gb_string()
     self._test_ZipWrite(file_contents, {
         "compress_type": zipfile.ZIP_DEFLATED,
     })
 
   def test_ZipWrite_resets_ZIP64_LIMIT(self):
-    default_limit = (1 << 31) - 1
-    self.assertEqual(default_limit, zipfile.ZIP64_LIMIT)
-    self._test_ZipWrite('')
-    self.assertEqual(default_limit, zipfile.ZIP64_LIMIT)
+    self._test_reset_ZIP64_LIMIT(self._test_ZipWrite, "")
+
+  def test_ZipWriteStr(self):
+    random_string = os.urandom(1024)
+    # Passing arcname
+    self._test_ZipWriteStr("foo", random_string)
+
+    # Passing zinfo
+    zinfo = zipfile.ZipInfo(filename="foo")
+    self._test_ZipWriteStr(zinfo, random_string)
+
+    # Timestamp in the zinfo should be overwritten.
+    zinfo.date_time = (2015, 3, 1, 15, 30, 0)
+    self._test_ZipWriteStr(zinfo, random_string)
+
+  def test_ZipWriteStr_with_opts(self):
+    random_string = os.urandom(1024)
+    # Passing arcname
+    self._test_ZipWriteStr("foo", random_string, {
+        "perms": 0o700,
+        "compress_type": zipfile.ZIP_DEFLATED,
+    })
+    self._test_ZipWriteStr("bar", random_string, {
+        "compress_type": zipfile.ZIP_STORED,
+    })
+
+    # Passing zinfo
+    zinfo = zipfile.ZipInfo(filename="foo")
+    self._test_ZipWriteStr(zinfo, random_string, {
+        "compress_type": zipfile.ZIP_DEFLATED,
+    })
+    self._test_ZipWriteStr(zinfo, random_string, {
+        "perms": 0o600,
+        "compress_type": zipfile.ZIP_STORED,
+    })
+
+  def test_ZipWriteStr_large_file(self):
+    # zipfile.writestr() doesn't work when the str size is over 2GiB even with
+    # the workaround. We will only test the case of writing a string into a
+    # large archive.
+    long_string = get_2gb_string()
+    short_string = os.urandom(1024)
+    self._test_ZipWriteStr_large_file(long_string, short_string, {
+        "compress_type": zipfile.ZIP_DEFLATED,
+    })
+
+  def test_ZipWriteStr_resets_ZIP64_LIMIT(self):
+    self._test_reset_ZIP64_LIMIT(self._test_ZipWriteStr, "foo", "")
+    zinfo = zipfile.ZipInfo(filename="foo")
+    self._test_reset_ZIP64_LIMIT(self._test_ZipWriteStr, zinfo, "")
+
+  def test_bug21309935(self):
+    zip_file = tempfile.NamedTemporaryFile(delete=False)
+    zip_file_name = zip_file.name
+    zip_file.close()
+
+    try:
+      random_string = os.urandom(1024)
+      zip_file = zipfile.ZipFile(zip_file_name, "w")
+      # Default perms should be 0o644 when passing the filename.
+      common.ZipWriteStr(zip_file, "foo", random_string)
+      # Honor the specified perms.
+      common.ZipWriteStr(zip_file, "bar", random_string, perms=0o755)
+      # The perms in zinfo should be untouched.
+      zinfo = zipfile.ZipInfo(filename="baz")
+      zinfo.external_attr = 0o740 << 16
+      common.ZipWriteStr(zip_file, zinfo, random_string)
+      # Explicitly specified perms has the priority.
+      zinfo = zipfile.ZipInfo(filename="qux")
+      zinfo.external_attr = 0o700 << 16
+      common.ZipWriteStr(zip_file, zinfo, random_string, perms=0o400)
+      common.ZipClose(zip_file)
+
+      self._verify(zip_file, zip_file_name, "foo", random_string,
+                   expected_mode=0o644)
+      self._verify(zip_file, zip_file_name, "bar", random_string,
+                   expected_mode=0o755)
+      self._verify(zip_file, zip_file_name, "baz", random_string,
+                   expected_mode=0o740)
+      self._verify(zip_file, zip_file_name, "qux", random_string,
+                   expected_mode=0o400)
+    finally:
+      os.remove(zip_file_name)