diff --git a/.gitignore b/.gitignore
index c9b568f..f1f4a52 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,5 @@
 *.pyc
 *.swp
+blueprint/
+kati/
+soong/
diff --git a/core/Makefile b/core/Makefile
index e17c4ed..73d6e4b 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -106,7 +106,7 @@
 BUILD_VERSION_TAGS := $(subst $(space),$(comma),$(sort $(BUILD_VERSION_TAGS)))
 
 # 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)
+build_desc := $(TARGET_PRODUCT)-$(TARGET_BUILD_VARIANT) $(PLATFORM_VERSION) $(BUILD_ID) $(BUILD_NUMBER_FROM_FILE) $(BUILD_VERSION_TAGS)
 $(INSTALLED_BUILD_PROP_TARGET): PRIVATE_BUILD_DESC := $(build_desc)
 
 # The string used to uniquely identify the combined build and product; used by the OTA server.
@@ -124,6 +124,9 @@
   $(error BUILD_FINGERPRINT cannot contain spaces: "$(BUILD_FINGERPRINT)")
 endif
 
+$(shell mkdir -p $(PRODUCT_OUT) && echo $(BUILD_FINGERPRINT) > $(PRODUCT_OUT)/build_fingerprint.txt)
+BUILD_FINGERPRINT_FROM_FILE := $$(cat $(PRODUCT_OUT)/build_fingerprint.txt)
+
 # The string used to uniquely identify the system build; used by the OTA server.
 # This purposefully excludes any product-specific variables.
 ifeq (,$(strip $(BUILD_THUMBPRINT)))
@@ -147,7 +150,7 @@
 
   # Dev. branches should have DISPLAY_BUILD_NUMBER set
   ifeq "true" "$(DISPLAY_BUILD_NUMBER)"
-    BUILD_DISPLAY_ID := $(BUILD_ID).$(BUILD_NUMBER) $(BUILD_KEYS)
+    BUILD_DISPLAY_ID := $(BUILD_ID).$(BUILD_NUMBER_FROM_FILE) $(BUILD_KEYS)
   else
     BUILD_DISPLAY_ID := $(BUILD_ID) $(BUILD_KEYS)
   endif
@@ -194,14 +197,15 @@
 			PRIVATE_BUILD_DESC="$(PRIVATE_BUILD_DESC)" \
 			BUILD_ID="$(BUILD_ID)" \
 			BUILD_DISPLAY_ID="$(BUILD_DISPLAY_ID)" \
-			BUILD_NUMBER="$(BUILD_NUMBER)" \
+			BUILD_NUMBER="$(BUILD_NUMBER_FROM_FILE)" \
+			BOARD_BUILD_SYSTEM_ROOT_IMAGE="$(BOARD_BUILD_SYSTEM_ROOT_IMAGE)" \
 			PLATFORM_VERSION="$(PLATFORM_VERSION)" \
 			PLATFORM_SDK_VERSION="$(PLATFORM_SDK_VERSION)" \
 			PLATFORM_VERSION_CODENAME="$(PLATFORM_VERSION_CODENAME)" \
 			PLATFORM_VERSION_ALL_CODENAMES="$(PLATFORM_VERSION_ALL_CODENAMES)" \
 			BUILD_VERSION_TAGS="$(BUILD_VERSION_TAGS)" \
 			TARGET_BOOTLOADER_BOARD_NAME="$(TARGET_BOOTLOADER_BOARD_NAME)" \
-			BUILD_FINGERPRINT="$(BUILD_FINGERPRINT)" \
+			BUILD_FINGERPRINT="$(BUILD_FINGERPRINT_FROM_FILE)" \
 			$(if $(OEM_THUMBPRINT_PROPERTIES),BUILD_THUMBPRINT="$(BUILD_THUMBPRINT)") \
 			TARGET_BOARD_PLATFORM="$(TARGET_BOARD_PLATFORM)" \
 			TARGET_CPU_ABI_LIST="$(TARGET_CPU_ABI_LIST)" \
@@ -244,7 +248,7 @@
 	$(hide) echo > $@
 	$(hide) echo ro.vendor.build.date=`date`>>$@
 	$(hide) echo ro.vendor.build.date.utc=`date +%s`>>$@
-	$(hide) echo ro.vendor.build.fingerprint="$(BUILD_FINGERPRINT)">>$@
+	$(hide) echo ro.vendor.build.fingerprint="$(BUILD_FINGERPRINT_FROM_FILE)">>$@
 endif
 
 # ----------------------------------------------------------------
@@ -260,7 +264,7 @@
 	$(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)">>$@
+	$(hide) echo ro.bootimage.build.fingerprint="$(BUILD_FINGERPRINT_FROM_FILE)">>$@
 
 # -----------------------------------------------------------------
 # sdk-build.prop
@@ -691,7 +695,7 @@
 INTERNAL_USERIMAGES_DEPS += $(BUILD_VERITY_TREE) $(APPEND2SIMG) $(VERITY_SIGNER)
 endif
 
-SELINUX_FC := $(TARGET_ROOT_OUT)/file_contexts
+SELINUX_FC := $(TARGET_ROOT_OUT)/file_contexts.bin
 INTERNAL_USERIMAGES_DEPS += $(SELINUX_FC)
 
 # $(1): the path of the output dictionary file
@@ -702,6 +706,8 @@
 $(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))
 $(if $(BOARD_USERDATAIMAGE_PARTITION_SIZE),$(hide) echo "userdata_size=$(BOARD_USERDATAIMAGE_PARTITION_SIZE)" >> $(1))
 $(if $(BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE),$(hide) echo "cache_fs_type=$(BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE)" >> $(1))
@@ -773,18 +779,27 @@
 recovery_font := $(call include-path-for, recovery)/fonts/12x22.png
 endif
 
-recovery_resources_private := $(strip $(wildcard $(TARGET_DEVICE_DIR)/recovery/res))
+ifndef TARGET_PRIVATE_RES_DIRS
+TARGET_PRIVATE_RES_DIRS := $(wildcard $(TARGET_DEVICE_DIR)/recovery/res)
+endif
 recovery_resource_deps := $(shell find $(recovery_resources_common) \
-  $(recovery_resources_private) -type f)
+  $(TARGET_PRIVATE_RES_DIRS) -type f)
 ifdef TARGET_RECOVERY_FSTAB
 recovery_fstab := $(TARGET_RECOVERY_FSTAB)
 else
 recovery_fstab := $(strip $(wildcard $(TARGET_DEVICE_DIR)/recovery.fstab))
 endif
+
+ifneq ($(BOARD_USES_FULL_RECOVERY_IMAGE),true)
 # Named '.dat' so we don't attempt to use imgdiff for patching it.
 RECOVERY_RESOURCE_ZIP := $(TARGET_OUT)/etc/recovery-resource.dat
+else
+# We carry a full copy of the recovery image. recovery-resource.dat is no
+# longer needed.
+RECOVERY_RESOURCE_ZIP :=
+endif
 
-ifeq ($(recovery_resources_private),)
+ifeq ($(TARGET_PRIVATE_RES_DIRS),)
   $(info No private recovery resources for TARGET_DEVICE $(TARGET_DEVICE))
 endif
 
@@ -833,7 +848,7 @@
   $(hide) mkdir -p $(TARGET_RECOVERY_OUT)
   $(hide) mkdir -p $(TARGET_RECOVERY_ROOT_OUT)/etc $(TARGET_RECOVERY_ROOT_OUT)/tmp
   @echo Copying baseline ramdisk...
-  $(hide) rsync -a $(TARGET_ROOT_OUT) $(TARGET_RECOVERY_OUT) # "cp -Rf" fails to overwrite broken symlinks on Mac.
+  $(hide) rsync -a --exclude=etc $(TARGET_ROOT_OUT) $(TARGET_RECOVERY_OUT) # "cp -Rf" fails to overwrite broken symlinks on Mac.
   @echo Modifying ramdisk contents...
   $(hide) rm -f $(TARGET_RECOVERY_ROOT_OUT)/init*.rc
   $(hide) cp -f $(recovery_initrc) $(TARGET_RECOVERY_ROOT_OUT)/
@@ -844,13 +859,17 @@
   $(hide) rm -rf $(TARGET_RECOVERY_ROOT_OUT)/res/*
   $(hide) cp -rf $(recovery_resources_common)/* $(TARGET_RECOVERY_ROOT_OUT)/res
   $(hide) cp -f $(recovery_font) $(TARGET_RECOVERY_ROOT_OUT)/res/images/font.png
-  $(hide) $(foreach item,$(recovery_resources_private), \
-    cp -rf $(item) $(TARGET_RECOVERY_ROOT_OUT)/)
+  $(hide) $(foreach item,$(TARGET_PRIVATE_RES_DIRS), \
+    cp -rf $(item) $(TARGET_RECOVERY_ROOT_OUT)/$(newline))
   $(hide) $(foreach item,$(recovery_fstab), \
     cp -f $(item) $(TARGET_RECOVERY_ROOT_OUT)/etc/recovery.fstab)
   $(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
+  $(if $(filter true,$(BOARD_BUILD_SYSTEM_ROOT_IMAGE)), \
+    $(hide) mkdir -p $(TARGET_RECOVERY_ROOT_OUT)/system_root; \
+            rm -rf $(TARGET_RECOVERY_ROOT_OUT)/system; \
+            ln -sf /system_root/system $(TARGET_RECOVERY_ROOT_OUT)/system) # Mount the system_root_image to /system_root and symlink /system.
   $(hide) $(MKBOOTFS) $(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, \
@@ -874,16 +893,18 @@
 		$(RECOVERY_INSTALL_OTA_KEYS)
 		$(call build-recoveryimage-target, $@)
 
+ifneq ($(BOARD_USES_FULL_RECOVERY_IMAGE),true)
 $(RECOVERY_RESOURCE_ZIP): $(INSTALLED_RECOVERYIMAGE_TARGET)
 	$(hide) mkdir -p $(dir $@)
 	$(hide) find $(TARGET_RECOVERY_ROOT_OUT)/res -type f | sort | zip -0qrj $@ -@
+endif
 
 .PHONY: recoveryimage-nodeps
 recoveryimage-nodeps:
 	@echo "make $@: ignoring dependencies"
 	$(call build-recoveryimage-target, $(INSTALLED_RECOVERYIMAGE_TARGET))
 
-else
+else # ! ifeq (,$(filter true, $(TARGET_NO_KERNEL) $(TARGET_NO_RECOVERY)))
 INSTALLED_RECOVERYIMAGE_TARGET :=
 RECOVERY_RESOURCE_ZIP :=
 endif
@@ -991,6 +1012,7 @@
 # we can see how big it's going to be, and include that in the system
 # image size check calculation.
 ifneq ($(INSTALLED_RECOVERYIMAGE_TARGET),)
+ifneq ($(BOARD_USES_FULL_RECOVERY_IMAGE),true)
 intermediates := $(call intermediates-dir-for,PACKAGING,recovery_patch)
 RECOVERY_FROM_BOOT_PATCH := $(intermediates)/recovery_from_boot.p
 $(RECOVERY_FROM_BOOT_PATCH): $(INSTALLED_RECOVERYIMAGE_TARGET) \
@@ -1000,6 +1022,9 @@
 	@echo "Construct recovery from boot"
 	mkdir -p $(dir $@)
 	PATH=$(HOST_OUT_EXECUTABLES):$$PATH $(HOST_OUT_EXECUTABLES)/imgdiff $(INSTALLED_BOOTIMAGE_TARGET) $(INSTALLED_RECOVERYIMAGE_TARGET) $@
+else # $(BOARD_USES_FULL_RECOVERY_IMAGE) == true
+RECOVERY_FROM_BOOT_PATCH := $(INSTALLED_RECOVERYIMAGE_TARGET)
+endif
 endif
 
 
@@ -1259,7 +1284,8 @@
 # -----------------------------------------------------------------
 # host tools needed to build dist and OTA packages
 
-DISTTOOLS :=  $(HOST_OUT_EXECUTABLES)/minigzip \
+OTATOOLS :=  $(HOST_OUT_EXECUTABLES)/minigzip \
+  $(HOST_OUT_EXECUTABLES)/aapt \
   $(HOST_OUT_EXECUTABLES)/mkbootfs \
   $(HOST_OUT_EXECUTABLES)/mkbootimg \
   $(HOST_OUT_EXECUTABLES)/fs_config \
@@ -1280,7 +1306,7 @@
   $(HOST_OUT_EXECUTABLES)/boot_signer
 
 # Shared libraries.
-DISTTOOLS += \
+OTATOOLS += \
   $(HOST_LIBRARY_PATH)/libc++$(HOST_SHLIB_SUFFIX) \
   $(HOST_LIBRARY_PATH)/liblog$(HOST_SHLIB_SUFFIX) \
   $(HOST_LIBRARY_PATH)/libcutils$(HOST_SHLIB_SUFFIX) \
@@ -1294,9 +1320,6 @@
   $(HOST_LIBRARY_PATH)/libext2_quota_host$(HOST_SHLIB_SUFFIX) \
   $(HOST_LIBRARY_PATH)/libext2_uuid_host$(HOST_SHLIB_SUFFIX)
 
-OTATOOLS := $(DISTTOOLS) \
-  $(HOST_OUT_EXECUTABLES)/aapt
-
 .PHONY: otatools
 otatools: $(OTATOOLS)
 
@@ -1412,8 +1435,14 @@
 endif
 	@# Components of the boot image
 	$(hide) mkdir -p $(zip_root)/BOOT
+ifeq ($(BOARD_BUILD_SYSTEM_ROOT_IMAGE),true)
+	$(hide) mkdir -p $(zip_root)/ROOT
+	$(hide) $(call package_files-copy-root, \
+		$(TARGET_ROOT_OUT),$(zip_root)/ROOT)
+else
 	$(hide) $(call package_files-copy-root, \
 		$(TARGET_ROOT_OUT),$(zip_root)/BOOT/RAMDISK)
+endif
 ifdef INSTALLED_KERNEL_TARGET
 	$(hide) $(ACP) $(INSTALLED_KERNEL_TARGET) $(zip_root)/BOOT/kernel
 endif
@@ -1454,6 +1483,7 @@
 	$(hide) $(ACP) $(APKCERTS_FILE) $(zip_root)/META/apkcerts.txt
 	$(hide) if test -e $(tool_extensions)/releasetools.py; then $(ACP) $(tool_extensions)/releasetools.py $(zip_root)/META/; fi
 	$(hide) echo "$(PRODUCT_OTA_PUBLIC_KEYS)" > $(zip_root)/META/otakeys.txt
+	$(hide) $(ACP) $(SELINUX_FC) $(zip_root)/META/file_contexts.bin
 	$(hide) echo "recovery_api_version=$(PRIVATE_RECOVERY_API_VERSION)" > $(zip_root)/META/misc_info.txt
 	$(hide) echo "fstab_version=$(PRIVATE_RECOVERY_FSTAB_VERSION)" >> $(zip_root)/META/misc_info.txt
 ifdef BOARD_FLASH_BLOCK_SIZE
@@ -1492,6 +1522,9 @@
 	# We need to create userdata.img with real data because the instrumented libraries are in userdata.img.
 	$(hide) echo "userdata_img_with_data=true" >> $(zip_root)/META/misc_info.txt
 endif
+ifeq ($(BOARD_USES_FULL_RECOVERY_IMAGE),true)
+	$(hide) echo "full_recovery_image=true" >> $(zip_root)/META/misc_info.txt
+endif
 	$(call generate-userimage-prop-dictionary, $(zip_root)/META/misc_info.txt)
 	$(hide) PATH=$(foreach p,$(INTERNAL_USERIMAGES_BINARY_PATHS),$(p):)$$PATH MKBOOTIMG=$(MKBOOTIMG) \
 	    ./build/tools/releasetools/make_recovery_patch $(zip_root) $(zip_root)
@@ -1501,11 +1534,15 @@
 	@# and recovery ramdisk files in the zip, and save the output
 	$(hide) zipinfo -1 $@ | awk 'BEGIN { FS="SYSTEM/" } /^SYSTEM\// {print "system/" $$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/" $$2}' | $(HOST_OUT_EXECUTABLES)/fs_config -C -S $(SELINUX_FC) > $(zip_root)/META/vendor_filesystem_config.txt
+ifeq ($(BOARD_BUILD_SYSTEM_ROOT_IMAGE),true)
+	$(hide) zipinfo -1 $@ | awk 'BEGIN { FS="ROOT/" } /^ROOT\// {print $$2}' | $(HOST_OUT_EXECUTABLES)/fs_config -C -S $(SELINUX_FC) > $(zip_root)/META/root_filesystem_config.txt
+else
 	$(hide) zipinfo -1 $@ | awk 'BEGIN { FS="BOOT/RAMDISK/" } /^BOOT\/RAMDISK\// {print $$2}' | $(HOST_OUT_EXECUTABLES)/fs_config -C -S $(SELINUX_FC) > $(zip_root)/META/boot_filesystem_config.txt
+endif
 	$(hide) zipinfo -1 $@ | awk 'BEGIN { FS="RECOVERY/RAMDISK/" } /^RECOVERY\/RAMDISK\// {print $$2}' | $(HOST_OUT_EXECUTABLES)/fs_config -C -S $(SELINUX_FC) > $(zip_root)/META/recovery_filesystem_config.txt
 	$(hide) (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) $@
+	    ./build/tools/releasetools/add_img_to_target_files -v -p $(HOST_OUT) $@
 
 .PHONY: target-files-package
 target-files-package: $(BUILT_TARGET_FILES_PACKAGE)
@@ -1514,12 +1551,27 @@
 $(call dist-for-goals, target-files-package, $(BUILT_TARGET_FILES_PACKAGE))
 endif
 
-ifneq ($(SANITIZE_TARGET),address)
-ifneq ($(TARGET_PRODUCT),sdk)
-ifeq ($(filter generic%,$(TARGET_DEVICE)),)
-ifneq ($(TARGET_NO_KERNEL),true)
-ifneq ($(recovery_fstab),)
+build_ota_package := true
+ifeq ($(BUILD_OS),darwin)
+build_ota_package := false
+endif
+ifeq ($(SANITIZE_TARGET),address)
+build_ota_package := false
+endif
+ifeq ($(TARGET_PRODUCT),sdk)
+build_ota_package := false
+endif
+ifneq ($(filter generic%,$(TARGET_DEVICE)),)
+build_ota_package := false
+endif
+ifeq ($(TARGET_NO_KERNEL),true)
+build_ota_package := false
+endif
+ifeq ($(recovery_fstab),)
+build_ota_package := false
+endif
 
+ifeq ($(build_ota_package),true)
 # -----------------------------------------------------------------
 # OTA update package
 
@@ -1533,7 +1585,7 @@
 
 $(INTERNAL_OTA_PACKAGE_TARGET): KEY_CERT_PAIR := $(DEFAULT_KEY_CERT_PAIR)
 
-$(INTERNAL_OTA_PACKAGE_TARGET): $(BUILT_TARGET_FILES_PACKAGE) $(DISTTOOLS)
+$(INTERNAL_OTA_PACKAGE_TARGET): $(BUILT_TARGET_FILES_PACKAGE)
 	@echo "Package OTA: $@"
 	$(hide) PATH=$(foreach p,$(INTERNAL_USERIMAGES_BINARY_PATHS),$(p):)$$PATH MKBOOTIMG=$(MKBOOTIMG) \
 	   ./build/tools/releasetools/ota_from_target_files -v \
@@ -1546,11 +1598,7 @@
 .PHONY: otapackage
 otapackage: $(INTERNAL_OTA_PACKAGE_TARGET)
 
-endif    # recovery_fstab is defined
-endif    # TARGET_NO_KERNEL != true
-endif    # TARGET_DEVICE != generic*
-endif    # TARGET_PRODUCT != sdk
-endif    # SANITIZE_TARGET != address
+endif    # build_ota_package
 
 # -----------------------------------------------------------------
 # The update package
@@ -1563,7 +1611,7 @@
 
 INTERNAL_UPDATE_PACKAGE_TARGET := $(PRODUCT_OUT)/$(name).zip
 
-$(INTERNAL_UPDATE_PACKAGE_TARGET): $(BUILT_TARGET_FILES_PACKAGE) $(DISTTOOLS)
+$(INTERNAL_UPDATE_PACKAGE_TARGET): $(BUILT_TARGET_FILES_PACKAGE)
 	@echo "Package: $@"
 	$(hide) PATH=$(foreach p,$(INTERNAL_USERIMAGES_BINARY_PATHS),$(p):)$$PATH MKBOOTIMG=$(MKBOOTIMG) \
 	   ./build/tools/releasetools/img_from_target_files -v \
diff --git a/core/binary.mk b/core/binary.mk
index 116e261..35ecaa3 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -24,7 +24,7 @@
   endif
 else
   ifeq ($(LOCAL_SYSTEM_SHARED_LIBRARIES),none)
-      my_system_shared_libraries := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES)
+      my_system_shared_libraries := libc libm
   else
       my_system_shared_libraries := $(LOCAL_SYSTEM_SHARED_LIBRARIES)
   endif
@@ -46,7 +46,9 @@
 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)
@@ -177,6 +179,22 @@
     endif
 endif
 
+my_cpp_std_version := -std=gnu++14
+ifdef LOCAL_SDK_VERSION
+    # The NDK handles this itself.
+    my_cpp_std_version :=
+endif
+
+ifdef LOCAL_IS_HOST_MODULE
+    ifneq ($(my_clang),true)
+        # The host GCC doesn't support C++14 (and is deprecated, so likely
+        # never will). Build these modules with C++11.
+        my_cpp_std_version := -std=gnu++11
+    endif
+endif
+
+my_cppflags := $(my_cpp_std_version) $(my_cppflags)
+
 # Add option to make clang the default for device build
 ifeq ($(USE_CLANG_PLATFORM_BUILD),true)
     ifeq ($(my_clang),)
@@ -201,6 +219,8 @@
 b_lib :=
 endif
 
+my_linker := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LINKER)
+
 include $(BUILD_SYSTEM)/config_sanitizers.mk
 
 ifeq ($(strip $($(LOCAL_2ND_ARCH_VAR_PREFIX)WITHOUT_$(my_prefix)CLANG)),true)
@@ -227,6 +247,9 @@
     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
 
 ###########################################################
@@ -337,6 +360,7 @@
   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)"
@@ -353,6 +377,7 @@
   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)"
@@ -361,6 +386,7 @@
   my_cxx := $(SYNTAX_TOOLS_PREFIX)/cxx-syntax $(my_syntax_arch) "$(my_cxx)"
 endif
 endif
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_LINKER := $(my_linker)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_CXX := $(my_cxx)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_CLANG := $(my_clang)
 
@@ -435,6 +461,20 @@
 RenderScript_file_stamp := $(intermediates)/RenderScriptCPP.stamp
 renderscript_intermediate := $(intermediates)/renderscript
 
+renderscript_target_api :=
+
+ifneq (,$(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 := $(LOCAL_SDK_VERSION)
+endif
+endif  # LOCAL_SDK_VERSION is set
+endif  # LOCAL_RENDERSCRIPT_TARGET_API is set
+
+
 ifeq ($(LOCAL_RENDERSCRIPT_CC),)
 LOCAL_RENDERSCRIPT_CC := $(LLVM_RS_CC)
 endif
@@ -463,6 +503,7 @@
 $(RenderScript_file_stamp): PRIVATE_RS_FLAGS := $(renderscript_flags)
 $(RenderScript_file_stamp): PRIVATE_RS_SOURCE_FILES := $(renderscript_sources_fullpath)
 $(RenderScript_file_stamp): PRIVATE_RS_OUTPUT_DIR := $(renderscript_intermediate)
+$(RenderScript_file_stamp): PRIVATE_RS_TARGET_API := $(renderscript_target_api)
 $(RenderScript_file_stamp): PRIVATE_DEP_FILES := $(bc_dep_files)
 $(RenderScript_file_stamp): $(renderscript_sources_fullpath) $(LOCAL_RENDERSCRIPT_CC)
 	$(transform-renderscripts-to-cpp-and-bc)
@@ -560,6 +601,51 @@
 
 
 ###########################################################
+## Compile the .dbus.xml files to c++ headers
+###########################################################
+dbus_if_sources := $(filter %.dbus.xml,$(my_src_files))
+ifneq ($(dbus_if_sources),)
+
+dbus_if_sources_full_path := $(addprefix $(LOCAL_PATH)/,$(dbus_if_sources))
+dbus_service_config := $(filter %dbus-service-config.json,$(my_src_files))
+dbus_service_config_full_path := $(addprefix $(LOCAL_PATH)/,$(dbus_service_config))
+
+dbus_header_prefix := $(generated_sources_dir)/dbus_bindings
+dbus_adaptors_header := $(dbus_header_prefix)/adaptors.h
+dbus_proxies_header := $(dbus_header_prefix)/proxies.h
+dbus_method_names_header := $(dbus_header_prefix)/method_names.h
+
+dbus_generated_source_dependencies := \
+    $(dbus_if_sources_full_path) \
+    $(dbus_service_config_full_path) \
+    $(DBUS_GENERATOR)
+
+# Ensure that we only define build rules once in multilib builds.
+ifndef $(my_prefix)_$(LOCAL_MODULE_CLASS)_$(LOCAL_MODULE)_dbus_bindings_defined
+$(my_prefix)_$(LOCAL_MODULE_CLASS)_$(LOCAL_MODULE)_dbus_bindings_defined := true
+$(dbus_adaptors_header) : PRIVATE_DBUS_MODULE := $(LOCAL_MODULE)
+$(dbus_adaptors_header) : PRIVATE_DBUS_HEADER_DIRECTORY := $(dbus_header_prefix)
+$(dbus_adaptors_header) : PRIVATE_DBUS_SERVICE_CONFIG := $(dbus_service_config_full_path)
+$(dbus_adaptors_header) : PRIVATE_DBUS_ADAPTORS_HEADER := $(dbus_adaptors_header)
+$(dbus_adaptors_header) : PRIVATE_DBUS_PROXIES_HEADER := $(dbus_proxies_header)
+$(dbus_adaptors_header) : PRIVATE_DBUS_METHOD_NAMES_HEADER := $(dbus_method_names_header)
+$(dbus_adaptors_header) : PRIVATE_DBUS_INTERFACE_DEFINITIONS := $(dbus_if_sources_full_path)
+$(dbus_adaptors_header) : $(dbus_generated_source_dependencies)
+	$(generate-dbus-bindings)
+# These are actually generated by the above recipe, but we'd like to make the
+# dependency chain complete.
+$(dbus_proxies_header) : $(dbus_adaptors_header)
+$(dbus_method_names_header) : $(dbus_adaptors_header)
+endif  # $(my_prefix)_$(LOCAL_MODULE_CLASS)_$(LOCAL_MODULE)_dbus_bindings_defined
+
+my_generated_sources += \
+    $(dbus_adaptors_header) \
+    $(dbus_proxies_header) \
+    $(dbus_method_names_header)
+endif  # $(dbus_if_sources) non-empty
+
+
+###########################################################
 ## YACC: Compile .y and .yy files to .cpp and the to .o.
 ###########################################################
 
@@ -1054,6 +1140,15 @@
   my_cflags := $(filter-out $(fdo_incompatible_flags),$(my_cflags))
 endif
 
+# No one should ever use this flag. On GCC it's mere presence will disable all
+# warnings, even those that are specified after it (contrary to typical warning
+# flag behavior). This circumvents CFLAGS_NO_OVERRIDE from forcibly enabling the
+# warnings that are *always* bugs.
+my_illegal_flags := -w
+my_cflags := $(filter-out $(my_illegal_flags),$(my_cflags))
+my_cppflags := $(filter-out $(my_illegal_flags),$(my_cppflags))
+my_conlyflags := $(filter-out $(my_illegal_flags),$(my_conlyflags))
+
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_YACCFLAGS := $(LOCAL_YACCFLAGS)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_ASFLAGS := $(my_asflags)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_CONLYFLAGS := $(my_conlyflags)
diff --git a/core/ccache.mk b/core/ccache.mk
new file mode 100644
index 0000000..34e5e1c
--- /dev/null
+++ b/core/ccache.mk
@@ -0,0 +1,57 @@
+#
+# Copyright (C) 2015 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+ifneq ($(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 cd25604..5ac5477 100644
--- a/core/clang/TARGET_arm.mk
+++ b/core/clang/TARGET_arm.mk
@@ -70,3 +70,4 @@
 # Address sanitizer clang config
 $(clang_2nd_arch_prefix)ADDRESS_SANITIZER_RUNTIME_LIBRARY := libclang_rt.asan-arm-android
 $(clang_2nd_arch_prefix)ADDRESS_SANITIZER_RPATH := /data/vendor/lib:/$(TARGET_COPY_OUT_VENDOR)/lib:/data/lib
+$(clang_2nd_arch_prefix)ADDRESS_SANITIZER_LINKER := /system/bin/linker_asan
diff --git a/core/clang/TARGET_arm64.mk b/core/clang/TARGET_arm64.mk
index 0861568..5120a6d 100644
--- a/core/clang/TARGET_arm64.mk
+++ b/core/clang/TARGET_arm64.mk
@@ -68,3 +68,4 @@
 # Address sanitizer clang config
 ADDRESS_SANITIZER_RUNTIME_LIBRARY := libclang_rt.asan-arm64-android
 ADDRESS_SANITIZER_RPATH := /data/vendor/lib64:/$(TARGET_COPY_OUT_VENDOR)/lib64:/data/lib64
+ADDRESS_SANITIZER_LINKER := /system/bin/linker_asan64
diff --git a/core/clang/config.mk b/core/clang/config.mk
index 4875ea1..e747362 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 :=
diff --git a/core/cleanbuild.mk b/core/cleanbuild.mk
index b76e7a5..7885644 100644
--- a/core/cleanbuild.mk
+++ b/core/cleanbuild.mk
@@ -54,6 +54,7 @@
 # can have permission to touch it.
 include $(BUILD_SYSTEM)/cleanspec.mk
 INTERNAL_CLEAN_BUILD_VERSION := $(strip $(INTERNAL_CLEAN_BUILD_VERSION))
+INTERNAL_CLEAN_STEPS := $(strip $(INTERNAL_CLEAN_STEPS))
 
 # If the clean_steps.mk file is missing (usually after a clean build)
 # then we won't do anything.
@@ -105,11 +106,18 @@
   _crs_new_cmd :=
   steps :=
 endif
-CURRENT_CLEAN_BUILD_VERSION :=
-CURRENT_CLEAN_STEPS :=
 
 # Write the new state to the file.
 #
+rewrite_clean_steps_file :=
+ifneq ($(CURRENT_CLEAN_BUILD_VERSION)-$(CURRENT_CLEAN_STEPS),$(INTERNAL_CLEAN_BUILD_VERSION)-$(INTERNAL_CLEAN_STEPS))
+rewrite_clean_steps_file := true
+endif
+ifeq ($(wildcard $(clean_steps_file)),)
+# This is the first build.
+rewrite_clean_steps_file := true
+endif
+ifeq ($(rewrite_clean_steps_file),true)
 $(shell \
   mkdir -p $(dir $(clean_steps_file)) && \
   echo "CURRENT_CLEAN_BUILD_VERSION := $(INTERNAL_CLEAN_BUILD_VERSION)" > \
@@ -117,8 +125,12 @@
   echo "CURRENT_CLEAN_STEPS := $(INTERNAL_CLEAN_STEPS)" >> \
       $(clean_steps_file) \
  )
+endif
 
+CURRENT_CLEAN_BUILD_VERSION :=
+CURRENT_CLEAN_STEPS :=
 clean_steps_file :=
+rewrite_clean_steps_file :=
 INTERNAL_CLEAN_STEPS :=
 INTERNAL_CLEAN_BUILD_VERSION :=
 
@@ -164,7 +176,6 @@
     endif
   endif
 endif  # else, this is the first build, so no need to clean.
-PREVIOUS_BUILD_CONFIG :=
 
 ifdef PREVIOUS_SANITIZE_TARGET
   ifneq "$(current_sanitize_target)" "$(PREVIOUS_SANITIZE_TARGET)"
@@ -172,10 +183,10 @@
     force_objclean := true
   endif
 endif  # else, this is the first build, so no need to clean.
-PREVIOUS_SANITIZE_TARGET :=
 
 # Write the new state to the file.
 #
+ifneq ($(PREVIOUS_BUILD_CONFIG)-$(PREVIOUS_SANITIZE_TARGET),$(current_build_config)-$(current_sanitize_target))
 $(shell \
   mkdir -p $(dir $(previous_build_config_file)) && \
   echo "PREVIOUS_BUILD_CONFIG := $(current_build_config)" > \
@@ -183,6 +194,9 @@
   echo "PREVIOUS_SANITIZE_TARGET := $(current_sanitize_target)" >> \
       $(previous_build_config_file) \
  )
+endif
+PREVIOUS_BUILD_CONFIG :=
+PREVIOUS_SANITIZE_TARGET :=
 previous_build_config_file :=
 current_build_config :=
 
@@ -286,6 +300,50 @@
 endif
 force_objclean :=
 
+###########################################################
+# 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),$(current_prebuilt_tools))
+force_tools_clean := true
+endif
+endif # else, this is the first build, so no need to clean.
+
+# Write the new state to the file.
+ifneq ($(PREVIOUS_PREBUILT_TOOLS),$(current_prebuilt_tools))
+$(shell \
+  mkdir -p $(dir $(previous_prebuilt_tools_config_file)) && \
+  echo "PREVIOUS_PREBUILT_TOOLS:=$(current_prebuilt_tools)" > \
+    $(previous_prebuilt_tools_config_file))
+endif
+
+ifeq ($(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
@@ -303,4 +361,3 @@
 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 9d6f91b..e5d299c 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -154,7 +154,6 @@
 LOCAL_JAR_EXCLUDE_FILES:=
 LOCAL_JAR_PACKAGES:=
 LOCAL_JAR_EXCLUDE_PACKAGES:=
-LOCAL_LINT_FLAGS:=
 LOCAL_SOURCE_FILES_ALL_GENERATED:= # '',true
 # Don't delete the META_INF dir when merging static Java libraries.
 LOCAL_DONT_DELETE_JAR_META_INF:=
@@ -163,7 +162,6 @@
 LOCAL_PREBUILT_MODULE_FILE:=
 LOCAL_POST_LINK_CMD:=
 LOCAL_POST_INSTALL_CMD:=
-LOCAL_DIST_BUNDLED_BINARIES:=
 LOCAL_HAL_STATIC_LIBRARIES:=
 LOCAL_RMTYPEDEFS:=
 LOCAL_NO_SYNTAX_CHECK:=
diff --git a/core/combo/HOST_darwin-x86.mk b/core/combo/HOST_darwin-x86.mk
index e77fd21..85c883c 100644
--- a/core/combo/HOST_darwin-x86.mk
+++ b/core/combo/HOST_darwin-x86.mk
@@ -52,10 +52,6 @@
 $(combo_2nd_arch_prefix)HOST_SHLIB_SUFFIX := .dylib
 $(combo_2nd_arch_prefix)HOST_JNILIB_SUFFIX := .jnilib
 
-# TODO: add AndroidConfig.h for darwin-x86_64
-$(combo_2nd_arch_prefix)HOST_GLOBAL_CFLAGS += \
-    -include $(call select-android-config-h,darwin-x86)
-
 $(combo_2nd_arch_prefix)HOST_GLOBAL_ARFLAGS := cqs
 
 ############################################################
diff --git a/core/combo/HOST_darwin-x86_64.mk b/core/combo/HOST_darwin-x86_64.mk
index 0efa78f..93a1b3e 100644
--- a/core/combo/HOST_darwin-x86_64.mk
+++ b/core/combo/HOST_darwin-x86_64.mk
@@ -52,9 +52,6 @@
 HOST_SHLIB_SUFFIX := .dylib
 HOST_JNILIB_SUFFIX := .jnilib
 
-HOST_GLOBAL_CFLAGS += \
-    -include $(call select-android-config-h,darwin-x86)
-
 HOST_GLOBAL_ARFLAGS := cqs
 
 # We Reuse the following functions with the same name from HOST_darwin-x86.mk:
diff --git a/core/combo/TARGET_linux-arm.mk b/core/combo/TARGET_linux-arm.mk
index a2d3dee..7818e3e 100644
--- a/core/combo/TARGET_linux-arm.mk
+++ b/core/combo/TARGET_linux-arm.mk
@@ -190,6 +190,4 @@
 
 $(combo_2nd_arch_prefix)TARGET_PACK_MODULE_RELOCATIONS := true
 
-$(combo_2nd_arch_prefix)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libm
-
 $(combo_2nd_arch_prefix)TARGET_LINKER := /system/bin/linker
diff --git a/core/combo/TARGET_linux-arm64.mk b/core/combo/TARGET_linux-arm64.mk
index 0e4c6f1..863befe 100644
--- a/core/combo/TARGET_linux-arm64.mk
+++ b/core/combo/TARGET_linux-arm64.mk
@@ -161,6 +161,4 @@
 
 TARGET_PACK_MODULE_RELOCATIONS := true
 
-TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libm
-
 TARGET_LINKER := /system/bin/linker64
diff --git a/core/combo/TARGET_linux-mips.mk b/core/combo/TARGET_linux-mips.mk
index 962aa45..66461d9 100644
--- a/core/combo/TARGET_linux-mips.mk
+++ b/core/combo/TARGET_linux-mips.mk
@@ -164,6 +164,4 @@
 
 $(combo_2nd_arch_prefix)TARGET_PACK_MODULE_RELOCATIONS := true
 
-$(combo_2nd_arch_prefix)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libm
-
 $(combo_2nd_arch_prefix)TARGET_LINKER := /system/bin/linker
diff --git a/core/combo/TARGET_linux-mips64.mk b/core/combo/TARGET_linux-mips64.mk
index e940ef1..7aaded5 100644
--- a/core/combo/TARGET_linux-mips64.mk
+++ b/core/combo/TARGET_linux-mips64.mk
@@ -115,6 +115,9 @@
 			-Wl,--fatal-warnings \
 			$(arch_variant_ldflags)
 
+# Disable transitive dependency library symbol resolving.
+TARGET_GLOBAL_LDFLAGS += -Wl,--allow-shlib-undefined
+
 TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden
 
 # More flags/options can be added here
@@ -170,6 +173,4 @@
 
 TARGET_PACK_MODULE_RELOCATIONS := true
 
-TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libstdc++ libm
-
 TARGET_LINKER := /system/bin/linker64
diff --git a/core/combo/TARGET_linux-x86.mk b/core/combo/TARGET_linux-x86.mk
index f6dbcb8..0b87920 100644
--- a/core/combo/TARGET_linux-x86.mk
+++ b/core/combo/TARGET_linux-x86.mk
@@ -144,8 +144,6 @@
 
 $(combo_2nd_arch_prefix)TARGET_PACK_MODULE_RELOCATIONS := true
 
-$(combo_2nd_arch_prefix)TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libm
-
 $(combo_2nd_arch_prefix)TARGET_LINKER := /system/bin/linker
 
 $(combo_2nd_arch_prefix)TARGET_GLOBAL_YASM_FLAGS := -f elf32 -m x86
diff --git a/core/combo/TARGET_linux-x86_64.mk b/core/combo/TARGET_linux-x86_64.mk
index 7b9cd7b..bf443b3 100644
--- a/core/combo/TARGET_linux-x86_64.mk
+++ b/core/combo/TARGET_linux-x86_64.mk
@@ -151,8 +151,6 @@
 TARGET_CRTBEGIN_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
 TARGET_CRTEND_SO_O := $(TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
 
-TARGET_DEFAULT_SYSTEM_SHARED_LIBRARIES := libc libm
-
 TARGET_LINKER := /system/bin/linker64
 
 TARGET_GLOBAL_YASM_FLAGS := -f elf64 -m amd64
diff --git a/core/combo/include/arch/darwin-x86/AndroidConfig.h b/core/combo/include/arch/darwin-x86/AndroidConfig.h
deleted file mode 100644
index ee62edc..0000000
--- a/core/combo/include/arch/darwin-x86/AndroidConfig.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * Copyright (C) 2005 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.
- */
-
-/*
- * Android config -- "Darwin".  Used for X86 Mac OS X.
- */
-#ifndef _ANDROID_CONFIG_H
-#define _ANDROID_CONFIG_H
-
-/*
- * ===========================================================================
- *                              !!! IMPORTANT !!!
- * ===========================================================================
- *
- * This file is included by ALL C/C++ source files.  Don't put anything in
- * here unless you are absolutely certain it can't go anywhere else.
- *
- * Any C++ stuff must be wrapped with "#ifdef __cplusplus".  Do not use "//"
- * comments.
- */
-
-/*
- * Define if we have <malloc.h> header
- */
-/* #define HAVE_MALLOC_H 1 */
-
-/*
- * The default path separator for the platform
- */
-#define OS_PATH_SEPARATOR '/'
-
-#endif /*_ANDROID_CONFIG_H*/
diff --git a/core/combo/include/arch/linux-arm/AndroidConfig.h b/core/combo/include/arch/linux-arm/AndroidConfig.h
index fdd5b37..030a628 100644
--- a/core/combo/include/arch/linux-arm/AndroidConfig.h
+++ b/core/combo/include/arch/linux-arm/AndroidConfig.h
@@ -33,18 +33,8 @@
  */
 
 /*
- * Define if we have <malloc.h> header
- */
-#define HAVE_MALLOC_H 1
-
-/*
  * Define if we're running on *our* linux on device or emulator.
  */
 #define HAVE_ANDROID_OS 1
 
-/*
- * The default path separator for the platform
- */
-#define OS_PATH_SEPARATOR '/'
-
 #endif /* _ANDROID_CONFIG_H */
diff --git a/core/combo/include/arch/linux-arm64/AndroidConfig.h b/core/combo/include/arch/linux-arm64/AndroidConfig.h
index f7ab30f..a969ab7 100644
--- a/core/combo/include/arch/linux-arm64/AndroidConfig.h
+++ b/core/combo/include/arch/linux-arm64/AndroidConfig.h
@@ -33,18 +33,8 @@
  */
 
 /*
- * Define if we have <malloc.h> header
- */
-#define HAVE_MALLOC_H 1
-
-/*
  * Define if we're running on *our* linux on device or emulator.
  */
 #define HAVE_ANDROID_OS 1
 
-/*
- * The default path separator for the platform
- */
-#define OS_PATH_SEPARATOR '/'
-
 #endif /* _ANDROID_CONFIG_H */
diff --git a/core/combo/include/arch/linux-mips/AndroidConfig.h b/core/combo/include/arch/linux-mips/AndroidConfig.h
index 0d7eaf0..6e46f8a 100644
--- a/core/combo/include/arch/linux-mips/AndroidConfig.h
+++ b/core/combo/include/arch/linux-mips/AndroidConfig.h
@@ -33,18 +33,8 @@
  */
 
 /*
- * Define if we have <malloc.h> header
- */
-#define HAVE_MALLOC_H 1
-
-/*
  * Define if we're running on *our* linux on device or emulator.
  */
 #define HAVE_ANDROID_OS 1
 
-/*
- * The default path separator for the platform
- */
-#define OS_PATH_SEPARATOR '/'
-
 #endif /* _ANDROID_CONFIG_H */
diff --git a/core/combo/include/arch/linux-mips64/AndroidConfig.h b/core/combo/include/arch/linux-mips64/AndroidConfig.h
index 947691f..d4143a7 100644
--- a/core/combo/include/arch/linux-mips64/AndroidConfig.h
+++ b/core/combo/include/arch/linux-mips64/AndroidConfig.h
@@ -33,18 +33,8 @@
  */
 
 /*
- * Define if we have <malloc.h> header
- */
-#define HAVE_MALLOC_H 1
-
-/*
  * Define if we're running on *our* linux on device or emulator.
  */
 #define HAVE_ANDROID_OS 1
 
-/*
- * The default path separator for the platform
- */
-#define OS_PATH_SEPARATOR '/'
-
 #endif /* _ANDROID_CONFIG_H */
diff --git a/core/combo/include/arch/linux-x86/AndroidConfig.h b/core/combo/include/arch/linux-x86/AndroidConfig.h
index 4409e76..b8e4217 100644
--- a/core/combo/include/arch/linux-x86/AndroidConfig.h
+++ b/core/combo/include/arch/linux-x86/AndroidConfig.h
@@ -40,14 +40,4 @@
 #define _FILE_OFFSET_BITS 64
 #define _LARGEFILE_SOURCE 1
 
-/*
- * Define if we have <malloc.h> header
- */
-#define HAVE_MALLOC_H 1
-
-/*
- * The default path separator for the platform
- */
-#define OS_PATH_SEPARATOR '/'
-
 #endif /*_ANDROID_CONFIG_H*/
diff --git a/core/combo/include/arch/target_linux-x86/AndroidConfig.h b/core/combo/include/arch/target_linux-x86/AndroidConfig.h
index e73ceaa..90d5f00 100644
--- a/core/combo/include/arch/target_linux-x86/AndroidConfig.h
+++ b/core/combo/include/arch/target_linux-x86/AndroidConfig.h
@@ -19,18 +19,8 @@
  */
 
 /*
- * Define if we have <malloc.h> header
- */
-#define HAVE_MALLOC_H 1
-
-/*
  * Define if we're running on *our* linux on device or emulator.
  */
 #define HAVE_ANDROID_OS 1
 
-/*
- * The default path separator for the platform
- */
-#define OS_PATH_SEPARATOR '/'
-
 #endif /* _ANDROID_CONFIG_H */
diff --git a/core/combo/include/arch/windows/AndroidConfig.h b/core/combo/include/arch/windows/AndroidConfig.h
index e7eb837..60268c8 100644
--- a/core/combo/include/arch/windows/AndroidConfig.h
+++ b/core/combo/include/arch/windows/AndroidConfig.h
@@ -14,14 +14,6 @@
  * limitations under the License.
  */
 
-/*
- * Android config -- "CYGWIN_NT-5.1".
- *
- * Cygwin has pthreads, but GDB seems to get confused if you use it to
- * create threads.  By "confused", I mean it freezes up the first time the
- * debugged process creates a thread, even if you use CreateThread.  The
- * mere presence of pthreads linkage seems to cause problems.
- */
 #ifndef _ANDROID_CONFIG_H
 #define _ANDROID_CONFIG_H
 
@@ -37,27 +29,6 @@
  * comments.
  */
 
-/* MingW doesn't define __BEGIN_DECLS / __END_DECLS. */
-
-#ifndef __BEGIN_DECLS
-#  ifdef __cplusplus
-#    define __BEGIN_DECLS extern "C" {
-#  else
-#    define __BEGIN_DECLS
-#  endif
-#endif
-
-#ifndef __END_DECLS
-#  ifdef __cplusplus
-#    define __END_DECLS }
-#  else
-#    define __END_DECLS
-#  endif
-#endif
-
-/* TODO: replace references to this. */
-#define HAVE_WIN32_IPC
-
 #ifdef __CYGWIN__
 #error "CYGWIN is unsupported for platform builds"
 #endif
@@ -68,11 +39,6 @@
 #define HAVE_MS_C_RUNTIME
 
 /*
- * Define this if we want to use WinSock.
- */
-#define HAVE_WINSOCK
-
-/*
  * We need to choose between 32-bit and 64-bit off_t.  All of our code should
  * agree on the same size.  For desktop systems, use 64-bit values,
  * because some of our libraries (e.g. wxWidgets) expect to be built that way.
@@ -87,18 +53,4 @@
 #define _WIN32 1
 #define _WIN32_WINNT 0x0500     /* admit to using >= Win2K */
 
-#define HAVE_WINDOWS_PATHS      /* needed by simulator */
-
-/*
- * The default path separator for the platform
- */
-#define OS_PATH_SEPARATOR '\\'
-
-/*
- * Various definitions missing in MinGW
- */
-#ifdef USE_MINGW
-#define S_IRGRP 0
-#endif
-
 #endif /*_ANDROID_CONFIG_H*/
diff --git a/core/combo/mac_version.mk b/core/combo/mac_version.mk
index 6defba7..638e3a0 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
 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 88a1bcb..498c793 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -104,7 +104,7 @@
 # lines being executed, instead of a short message about
 # the kind of operation being done.
 SHOW_COMMANDS:= $(filter showcommands,$(MAKECMDGOALS))
-
+hide := $(if $(SHOW_COMMANDS),,@)
 
 # ###############################################################
 # Set common values
@@ -114,7 +114,7 @@
 COMMON_GLOBAL_CFLAGS:= -DANDROID -fmessage-length=0 -W -Wall -Wno-unused -Winit-self -Wpointer-arith
 COMMON_RELEASE_CFLAGS:= -DNDEBUG -UDEBUG
 
-COMMON_GLOBAL_CPPFLAGS:= $(COMMON_GLOBAL_CFLAGS) -Wsign-promo -std=gnu++11
+COMMON_GLOBAL_CPPFLAGS:= $(COMMON_GLOBAL_CFLAGS) -Wsign-promo
 COMMON_RELEASE_CPPFLAGS:= $(COMMON_RELEASE_CFLAGS)
 
 GLOBAL_CFLAGS_NO_OVERRIDE := \
@@ -257,6 +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
@@ -397,6 +399,7 @@
 AAPT := $(HOST_OUT_EXECUTABLES)/aapt$(HOST_EXECUTABLE_SUFFIX)
 AIDL := $(HOST_OUT_EXECUTABLES)/aidl$(HOST_EXECUTABLE_SUFFIX)
 PROTOC := $(HOST_OUT_EXECUTABLES)/aprotoc$(HOST_EXECUTABLE_SUFFIX)
+DBUS_GENERATOR := $(HOST_OUT_EXECUTABLES)/dbus-binding-generator
 SIGNAPK_JAR := $(HOST_OUT_JAVA_LIBRARIES)/signapk$(COMMON_JAVA_PACKAGE_SUFFIX)
 MKBOOTFS := $(HOST_OUT_EXECUTABLES)/mkbootfs$(HOST_EXECUTABLE_SUFFIX)
 MINIGZIP := $(HOST_OUT_EXECUTABLES)/minigzip$(HOST_EXECUTABLE_SUFFIX)
@@ -465,7 +468,6 @@
 JAVATAGS := build/tools/java-event-log-tags.py
 LLVM_RS_CC := $(HOST_OUT_EXECUTABLES)/llvm-rs-cc$(HOST_EXECUTABLE_SUFFIX)
 BCC_COMPAT := $(HOST_OUT_EXECUTABLES)/bcc_compat$(HOST_EXECUTABLE_SUFFIX)
-LINT := prebuilts/sdk/tools/lint
 RMTYPEDEFS := $(HOST_OUT_EXECUTABLES)/rmtypedefs
 APPEND2SIMG := $(HOST_OUT_EXECUTABLES)/append2simg
 VERITY_SIGNER := $(HOST_OUT_EXECUTABLES)/verity_signer
@@ -593,7 +595,7 @@
 
 # allow overriding default Java libraries on a per-target basis
 ifeq ($(TARGET_DEFAULT_JAVA_LIBRARIES),)
-  TARGET_DEFAULT_JAVA_LIBRARIES := core-libart core-junit ext framework
+  TARGET_DEFAULT_JAVA_LIBRARIES := core-libart core-junit ext framework okhttp
 endif
 
 # Flags for DEX2OAT
diff --git a/core/config_sanitizers.mk b/core/config_sanitizers.mk
index b43b1cc..78cedad 100644
--- a/core/config_sanitizers.mk
+++ b/core/config_sanitizers.mk
@@ -34,6 +34,18 @@
   my_sanitize :=
 endif
 
+# TSAN is not supported on 32-bit architectures. For non-multilib cases, make
+# its use an error. For multilib cases, don't use it for the 32-bit case.
+ifneq ($(filter thread,$(my_sanitize)),)
+  ifeq ($(my_32_64_bit_suffix),32)
+    ifeq ($(my_module_multilib),both)
+        my_sanitize := $(filter-out thread,$(my_sanitize))
+    else
+        $(error $(LOCAL_PATH): $(LOCAL_MODULE): TSAN cannot be used for 32-bit modules.)
+    endif
+  endif
+endif
+
 # Undefined symbols can occur if a non-sanitized library links
 # sanitized static libraries. That's OK, because the executable
 # always depends on the ASan runtime library, which defines these
@@ -45,6 +57,10 @@
         my_allow_undefined_symbols := true
       endif
     endif
+    # Workaround for a bug in AddressSanitizer that breaks stack unwinding.
+    # https://code.google.com/p/address-sanitizer/issues/detail?id=387
+    # Revert when external/compiler-rt is updated past r236014.
+    LOCAL_PACK_MODULE_RELOCATIONS := false
   endif
 endif
 
@@ -66,7 +82,7 @@
   ifdef LOCAL_IS_HOST_MODULE
     my_cflags += -fno-sanitize-recover=all
     my_ldflags += -fsanitize=$(fsanitize_arg)
-    my_ldlibs += -ldl
+    my_ldlibs += -lrt -ldl
   else
     my_cflags += -fsanitize-undefined-trap-on-error
     my_cflags += -ftrap-function=abort
@@ -85,12 +101,14 @@
     my_ldlibs += -lm -lpthread
     my_ldflags += -Wl,--no-as-needed
   else
+    my_cflags += -mllvm -asan-globals=0
     # 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)
+    my_linker := $($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_LINKER)
   endif
 endif
 
diff --git a/core/cxx_stl_setup.mk b/core/cxx_stl_setup.mk
index c59cd34..f150714 100644
--- a/core/cxx_stl_setup.mk
+++ b/core/cxx_stl_setup.mk
@@ -24,6 +24,18 @@
     endif
 else
     my_cxx_stl := $(strip $(LOCAL_CXX_STL))
+    ifdef LOCAL_SDK_VERSION
+        # The NDK has historically used LOCAL_NDK_STL_VARIANT to specify the
+        # STL. An Android.mk that specifies both LOCAL_CXX_STL and
+        # LOCAL_SDK_VERSION will incorrectly try (and most likely fail) to use
+        # the platform STL in an NDK binary. Emit an error to direct the user
+        # toward the correct option.
+        #
+        # Note that we could also accept LOCAL_CXX_STL as an alias for
+        # LOCAL_NDK_STL_VARIANT (and in fact soong does use the same name), but
+        # the two options use different names for the STLs.
+        $(error $(LOCAL_PATH): $(LOCAL_MODULE): Must use LOCAL_NDK_STL_VARIANT rather than LOCAL_CXX_STL for NDK binaries)
+    endif
 endif
 
 # Yes, this is actually what the clang driver does.
@@ -70,6 +82,7 @@
     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)
diff --git a/core/definitions.mk b/core/definitions.mk
index 442501e..35e3a79 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -139,7 +139,7 @@
 ###########################################################
 
 define all-makefiles-under
-$(wildcard $(1)/*/Android.mk)
+$(sort $(wildcard $(1)/*/Android.mk))
 endef
 
 ###########################################################
@@ -171,7 +171,7 @@
 
 # $(1): List of directories to look for under this directory
 define all-named-subdir-makefiles
-$(wildcard $(addsuffix /Android.mk, $(addprefix $(call my-dir)/,$(1))))
+$(sort $(wildcard $(addsuffix /Android.mk, $(addprefix $(call my-dir)/,$(1)))))
 endef
 
 ###########################################################
@@ -802,50 +802,12 @@
 define pretty
 @echo $1
 endef
-hide := @
 else
 define pretty
 endef
-hide :=
 endif
 
 ###########################################################
-## Dump the variables that are associated with targets
-###########################################################
-
-define dump-module-variables
-@echo all_dependencies=$^
-@echo PRIVATE_YACCFLAGS=$(PRIVATE_YACCFLAGS);
-@echo PRIVATE_CFLAGS=$(PRIVATE_CFLAGS);
-@echo PRIVATE_CPPFLAGS=$(PRIVATE_CPPFLAGS);
-@echo PRIVATE_DEBUG_CFLAGS=$(PRIVATE_DEBUG_CFLAGS);
-@echo PRIVATE_C_INCLUDES=$(PRIVATE_C_INCLUDES);
-@echo PRIVATE_LDFLAGS=$(PRIVATE_LDFLAGS);
-@echo PRIVATE_LDLIBS=$(PRIVATE_LDLIBS);
-@echo PRIVATE_ARFLAGS=$(PRIVATE_ARFLAGS);
-@echo PRIVATE_AAPT_FLAGS=$(PRIVATE_AAPT_FLAGS);
-@echo PRIVATE_DX_FLAGS=$(PRIVATE_DX_FLAGS);
-@echo PRIVATE_JAVACFLAGS=$(PRIVATE_JAVACFLAGS);
-@echo PRIVATE_JAVA_LIBRARIES=$(PRIVATE_JAVA_LIBRARIES);
-@echo PRIVATE_ALL_SHARED_LIBRARIES=$(PRIVATE_ALL_SHARED_LIBRARIES);
-@echo PRIVATE_ALL_STATIC_LIBRARIES=$(PRIVATE_ALL_STATIC_LIBRARIES);
-@echo PRIVATE_ALL_WHOLE_STATIC_LIBRARIES=$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES);
-@echo PRIVATE_ALL_OBJECTS=$(PRIVATE_ALL_OBJECTS);
-endef
-
-###########################################################
-## Commands for using sed to replace given variable values
-###########################################################
-
-define transform-variables
-@mkdir -p $(dir $@)
-@echo "Sed: $(if $(PRIVATE_MODULE),$(PRIVATE_MODULE),$@) <= $<"
-$(hide) sed $(foreach var,$(REPLACE_VARS),-e "s/{{$(var)}}/$(subst /,\/,$(PWD)/$($(var)))/g") $< >$@
-$(hide) if [ "$(suffix $@)" = ".sh" ]; then chmod a+rx $@; fi
-endef
-
-
-###########################################################
 ## Commands for munging the dependency files GCC generates
 ###########################################################
 # $(1): the input .d file
@@ -866,8 +828,8 @@
 ###########################################################
 
 define transform-l-to-cpp
-@mkdir -p $(dir $@)
 @echo "Lex: $(PRIVATE_MODULE) <= $<"
+@mkdir -p $(dir $@)
 $(hide) $(LEX) -o$@ $<
 endef
 
@@ -880,8 +842,8 @@
 ###########################################################
 
 define transform-y-to-cpp
-@mkdir -p $(dir $@)
 @echo "Yacc: $(PRIVATE_MODULE) <= $<"
+@mkdir -p $(dir $@)
 $(YACC) $(PRIVATE_YACCFLAGS) -o $@ $<
 touch $(@:$1=$(YACC_HEADER_SUFFIX))
 echo '#ifndef '$(@F:$1=_h) > $(@:$1=.h)
@@ -941,6 +903,7 @@
   -d $(PRIVATE_RS_OUTPUT_DIR) \
   -a $@ -MD \
   -reflect-c++ \
+  $(addprefix -target-api , $(PRIVATE_RS_TARGET_API)) \
   $(PRIVATE_RS_FLAGS) \
   $(addprefix -I , $(PRIVATE_RS_INCLUDES)) \
   $(PRIVATE_RS_SOURCE_FILES)
@@ -997,8 +960,8 @@
 ## Commands for running protoc to compile .proto into .pb.cc and .pb.h
 ######################################################################
 define transform-proto-to-cc
-@mkdir -p $(dir $@)
 @echo "Protoc: $@ <= $<"
+@mkdir -p $(dir $@)
 $(hide) $(PROTOC) \
 	$(addprefix --proto_path=, $(PRIVATE_PROTO_INCLUDES)) \
 	$(PRIVATE_PROTOC_FLAGS) \
@@ -1006,13 +969,28 @@
 endef
 
 
+######################################################################
+## Commands for running protoc to compile .proto into .pb.cc and .pb.h
+######################################################################
+define generate-dbus-bindings
+@echo "Generating DBus bindings for $(PRIVATE_DBUS_MODULE)"
+@mkdir -p $(PRIVATE_DBUS_HEADER_DIRECTORY)
+$(hide) $(DBUS_GENERATOR) \
+	--service-config=$(PRIVATE_DBUS_SERVICE_CONFIG) \
+	--adaptor=$(PRIVATE_DBUS_ADAPTORS_HEADER) \
+	--proxy=$(PRIVATE_DBUS_PROXIES_HEADER) \
+	--method-names=$(PRIVATE_DBUS_METHOD_NAMES_HEADER) \
+	$(PRIVATE_DBUS_INTERFACE_DEFINITIONS)
+endef
+
+
 ###########################################################
 ## Commands for running gcc to compile a C++ file
 ###########################################################
 
 define transform-cpp-to-o
-@mkdir -p $(dir $@)
 @echo "target $(PRIVATE_ARM_MODE) C++: $(PRIVATE_MODULE) <= $<"
+@mkdir -p $(dir $@)
 $(hide) $(PRIVATE_CXX) \
 	$(addprefix -I , $(PRIVATE_C_INCLUDES)) \
 	$(shell cat $(PRIVATE_IMPORT_INCLUDES)) \
@@ -1118,8 +1096,8 @@
 ###########################################################
 
 define transform-host-cpp-to-o
-@mkdir -p $(dir $@)
 @echo "host C++: $(PRIVATE_MODULE) <= $<"
+@mkdir -p $(dir $@)
 $(hide) $(PRIVATE_CXX) \
 	$(addprefix -I , $(PRIVATE_C_INCLUDES)) \
 	$(shell cat $(PRIVATE_IMPORT_INCLUDES)) \
@@ -1327,10 +1305,10 @@
 # Explicitly delete the archive first so that ar doesn't
 # try to add to an existing archive.
 define transform-o-to-static-lib
+@echo "target StaticLib: $(PRIVATE_MODULE) ($@)"
 @mkdir -p $(dir $@)
 @rm -f $@
 $(extract-and-include-target-whole-static-libs)
-@echo "target StaticLib: $(PRIVATE_MODULE) ($@)"
 $(call split-long-arguments,$($(PRIVATE_2ND_ARCH_VAR_PREFIX)TARGET_AR) \
     $($(PRIVATE_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_ARFLAGS) \
     $(PRIVATE_ARFLAGS) $@,$(PRIVATE_ALL_OBJECTS))
@@ -1376,10 +1354,10 @@
 # Explicitly delete the archive first so that ar doesn't
 # try to add to an existing archive.
 define transform-host-o-to-static-lib
+@echo "host StaticLib: $(PRIVATE_MODULE) ($@)"
 @mkdir -p $(dir $@)
 @rm -f $@
 $(extract-and-include-host-whole-static-libs)
-@echo "host StaticLib: $(PRIVATE_MODULE) ($@)"
 $(call split-long-arguments,$($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_AR) \
     $($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_GLOBAL_ARFLAGS) \
     $(PRIVATE_ARFLAGS) $@,$(PRIVATE_ALL_OBJECTS))
@@ -1420,14 +1398,14 @@
 endif
 
 define transform-host-o-to-shared-lib
-@mkdir -p $(dir $@)
 @echo "host SharedLib: $(PRIVATE_MODULE) ($@)"
+@mkdir -p $(dir $@)
 $(transform-host-o-to-shared-lib-inner)
 endef
 
 define transform-host-o-to-package
-@mkdir -p $(dir $@)
 @echo "host Package: $(PRIVATE_MODULE) ($@)"
+@mkdir -p $(dir $@)
 $(transform-host-o-to-shared-lib-inner)
 endef
 
@@ -1463,8 +1441,8 @@
 endef
 
 define transform-o-to-shared-lib
-@mkdir -p $(dir $@)
 @echo "target SharedLib: $(PRIVATE_MODULE) ($@)"
+@mkdir -p $(dir $@)
 $(transform-o-to-shared-lib-inner)
 endef
 
@@ -1479,15 +1457,15 @@
 endif
 
 define transform-to-stripped
-@mkdir -p $(dir $@)
 @echo "target Strip: $(PRIVATE_MODULE) ($@)"
+@mkdir -p $(dir $@)
 $(hide) $(PRIVATE_STRIP) --strip-all $< -o $@ \
   $(if $(PRIVATE_NO_DEBUGLINK),,$(TARGET_STRIP_EXTRA))
 endef
 
 define transform-to-stripped-keep-symbols
-@mkdir -p $(dir $@)
 @echo "target Strip (keep symbols): $(PRIVATE_MODULE) ($@)"
+@mkdir -p $(dir $@)
 $(hide) $(PRIVATE_OBJCOPY) \
     `$(PRIVATE_READELF) -S $< | awk '/.debug_/ {print "-R " $$2}' | xargs` \
     $(TARGET_STRIP_KEEP_SYMBOLS_EXTRA) $< $@
@@ -1498,8 +1476,8 @@
 ###########################################################
 
 define pack-elf-relocations
-$(copy-file-to-target)
 @echo "target Pack Relocations: $(PRIVATE_MODULE) ($@)"
+$(copy-file-to-target)
 $(hide) $(RELOCATION_PACKER) $@
 endef
 
@@ -1510,7 +1488,7 @@
 define transform-o-to-executable-inner
 $(hide) $(PRIVATE_CXX) -pie \
 	-nostdlib -Bdynamic \
-	-Wl,-dynamic-linker,$($(PRIVATE_2ND_ARCH_VAR_PREFIX)TARGET_LINKER) \
+	-Wl,-dynamic-linker,$(PRIVATE_LINKER) \
 	-Wl,--gc-sections \
 	-Wl,-z,nocopyreloc \
 	$(PRIVATE_TARGET_GLOBAL_LD_DIRS) \
@@ -1536,8 +1514,8 @@
 endef
 
 define transform-o-to-executable
-@mkdir -p $(dir $@)
 @echo "target Executable: $(PRIVATE_MODULE) ($@)"
+@mkdir -p $(dir $@)
 $(transform-o-to-executable-inner)
 endef
 
@@ -1580,8 +1558,8 @@
 endef
 
 define transform-o-to-static-executable
-@mkdir -p $(dir $@)
 @echo "target StaticExecutable: $(PRIVATE_MODULE) ($@)"
+@mkdir -p $(dir $@)
 $(transform-o-to-static-executable-inner)
 endef
 
@@ -1626,8 +1604,8 @@
 endif
 
 define transform-host-o-to-executable
-@mkdir -p $(dir $@)
 @echo "host Executable: $(PRIVATE_MODULE) ($@)"
+@mkdir -p $(dir $@)
 $(transform-host-o-to-executable-inner)
 endef
 
@@ -1636,9 +1614,6 @@
 ## Commands for running javac to make .class files
 ###########################################################
 
-#@echo "Source intermediates dir: $(PRIVATE_SOURCE_INTERMEDIATES_DIR)"
-#@echo "Source intermediates: $$(find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) -name '*.java')"
-
 # TODO: Right now we generate the asset resources twice, first as part
 # of generating the Java classes, then at the end when packaging the final
 # assets.  This should be changed to do one of two things: (1) Don't generate
@@ -1664,8 +1639,8 @@
     $(addprefix -G , $(PRIVATE_PROGUARD_OPTIONS_FILE)) \
     $(addprefix --min-sdk-version , $(PRIVATE_DEFAULT_APP_TARGET_SDK)) \
     $(addprefix --target-sdk-version , $(PRIVATE_DEFAULT_APP_TARGET_SDK)) \
-    $(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))) \
+    $(if $(filter --version-code,$(PRIVATE_AAPT_FLAGS)),,--version-code $(PLATFORM_SDK_VERSION)) \
+    $(if $(filter --version-name,$(PRIVATE_AAPT_FLAGS)),,--version-name $(PLATFORM_VERSION)-$(BUILD_NUMBER_FROM_FILE)) \
     $(addprefix --rename-manifest-package , $(PRIVATE_MANIFEST_PACKAGE_NAME)) \
     $(addprefix --rename-instrumentation-target-package , $(PRIVATE_MANIFEST_INSTRUMENTATION_FOR))
 endef
@@ -1753,7 +1728,7 @@
 $(call unzip-jar-files,$(PRIVATE_STATIC_JAVA_LIBRARIES),$(PRIVATE_CLASS_INTERMEDIATES_DIR))
 $(call dump-words-to-file,$(PRIVATE_JAVA_SOURCES),$(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list)
 $(hide) if [ -d "$(PRIVATE_SOURCE_INTERMEDIATES_DIR)" ]; then \
-          find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) -name '*.java' >> $(PRIVATE_CLASS_INTERMEDIATES_DIR)/java-source-list; \
+          find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) -name '*.java' -and -not -name '.*' >> $(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
@@ -1788,7 +1763,7 @@
         $(PRIVATE_CLASS_INTERMEDIATES_DIR)/$(subst .,/,$(pkg))))
 $(if $(PRIVATE_RMTYPEDEFS), $(hide) $(RMTYPEDEFS) -v $(PRIVATE_CLASS_INTERMEDIATES_DIR))
 $(if $(PRIVATE_JAR_MANIFEST), \
-    $(hide) sed -e 's/%BUILD_NUMBER%/$(BUILD_NUMBER)/' \
+    $(hide) sed -e "s/%BUILD_NUMBER%/$(BUILD_NUMBER_FROM_FILE)/" \
             $(PRIVATE_JAR_MANIFEST) > $(dir $@)/manifest.mf && \
         jar -cfm $@ $(dir $@)/manifest.mf \
             -C $(PRIVATE_CLASS_INTERMEDIATES_DIR) ., \
@@ -1817,7 +1792,7 @@
 $(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; \
+          find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) -name '*.java' -and -not -name '.*' >> $(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
@@ -1897,7 +1872,7 @@
 $(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; \
+          find $(PRIVATE_SOURCE_INTERMEDIATES_DIR) -name '*.java' -and -not -name '.*' >> $(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
@@ -1990,7 +1965,7 @@
         $(PRIVATE_CLASS_INTERMEDIATES_DIR)/$(subst .,/,$(pkg))))
 $(if $(PRIVATE_RMTYPEDEFS), $(hide) $(RMTYPEDEFS) -v $(PRIVATE_CLASS_INTERMEDIATES_DIR))
 $(if $(PRIVATE_JAR_MANIFEST), \
-    $(hide) sed -e 's/%BUILD_NUMBER%/$(BUILD_NUMBER)/' \
+    $(hide) sed -e "s/%BUILD_NUMBER%/$(BUILD_NUMBER_FROM_FILE)/" \
             $(PRIVATE_JAR_MANIFEST) > $(dir $@)/manifest.mf && \
         jar -cfm $@ $(dir $@)/manifest.mf \
             -C $(PRIVATE_CLASS_INTERMEDIATES_DIR) ., \
@@ -2093,8 +2068,8 @@
     $(addprefix --min-sdk-version , $(PRIVATE_DEFAULT_APP_TARGET_SDK)) \
     $(addprefix --target-sdk-version , $(PRIVATE_DEFAULT_APP_TARGET_SDK)) \
     $(if $(filter --product,$(PRIVATE_AAPT_FLAGS)),,$(addprefix --product , $(TARGET_AAPT_CHARACTERISTICS))) \
-    $(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))) \
+    $(if $(filter --version-code,$(PRIVATE_AAPT_FLAGS)),,--version-code $(PLATFORM_SDK_VERSION)) \
+    $(if $(filter --version-name,$(PRIVATE_AAPT_FLAGS)),,--version-name $(PLATFORM_VERSION)-$(BUILD_NUMBER_FROM_FILE)) \
     $(addprefix --rename-manifest-package , $(PRIVATE_MANIFEST_PACKAGE_NAME)) \
     $(addprefix --rename-instrumentation-target-package , $(PRIVATE_MANIFEST_INSTRUMENTATION_FOR)) \
     -F $@
diff --git a/core/dex_preopt.mk b/core/dex_preopt.mk
index 8b555e0..e0dde01 100644
--- a/core/dex_preopt.mk
+++ b/core/dex_preopt.mk
@@ -35,7 +35,7 @@
 _dbj_jar_no_dex := $(DEXPREOPT_BOOT_JAR_DIR_FULL_PATH)/$(1)_nodex.jar
 _dbj_src_jar := $(call intermediates-dir-for,JAVA_LIBRARIES,$(1),,COMMON)/javalib.jar
 
-$$(_dbj_jar_no_dex) : $$(_dbj_src_jar) | $(ACP) $(AAPT)
+$$(_dbj_jar_no_dex) : $$(_dbj_src_jar) | $(ACP)
 	$$(call copy-file-to-target)
 ifneq ($(DEX_PREOPT_DEFAULT),nostripping)
 	$$(call dexpreopt-remove-classes.dex,$$@)
diff --git a/core/dex_preopt_libart.mk b/core/dex_preopt_libart.mk
index 1de72b7..1bd0bd7 100644
--- a/core/dex_preopt_libart.mk
+++ b/core/dex_preopt_libart.mk
@@ -3,8 +3,13 @@
 #
 ####################################
 
+# Default to debug version to help find bugs.
+# Set USE_DEX2OAT_DEBUG to false for only building non-debug versions.
+ifeq ($(USE_DEX2OAT_DEBUG),false)
 DEX2OAT := $(HOST_OUT_EXECUTABLES)/dex2oat$(HOST_EXECUTABLE_SUFFIX)
-DEX2OATD := $(HOST_OUT_EXECUTABLES)/dex2oatd$(HOST_EXECUTABLE_SUFFIX)
+else
+DEX2OAT := $(HOST_OUT_EXECUTABLES)/dex2oatd$(HOST_EXECUTABLE_SUFFIX)
+endif
 
 # By default, do not run rerun dex2oat if the tool changes.
 # Comment out the | to force dex2oat to rerun on after all changes.
@@ -13,9 +18,6 @@
 DEX2OAT_DEPENDENCY += |
 DEX2OAT_DEPENDENCY += $(DEX2OAT)
 
-DEX2OATD_DEPENDENCY := $(DEX2OAT_DEPENDENCY)
-DEX2OATD_DEPENDENCY += $(DEX2OATD)
-
 # Use the first preloaded-classes file in PRODUCT_COPY_FILES.
 PRELOADED_CLASSES := $(call word-colon,1,$(firstword \
     $(filter %system/etc/preloaded-classes,$(PRODUCT_COPY_FILES))))
@@ -24,13 +26,6 @@
 COMPILED_CLASSES := $(call word-colon,1,$(firstword \
     $(filter %system/etc/compiled-classes,$(PRODUCT_COPY_FILES))))
 
-# Default to debug version to help find bugs.
-# Set USE_DEX2OAT_DEBUG to false for only building non-debug versions.
-ifneq ($(USE_DEX2OAT_DEBUG), false)
-DEX2OAT = $(DEX2OATD)
-DEX2OAT_DEPENDENCY = $(DEX2OATD_DEPENDENCY)
-endif
-
 # start of image reserved address space
 LIBART_IMG_HOST_BASE_ADDRESS   := 0x60000000
 LIBART_IMG_TARGET_BASE_ADDRESS := 0x70000000
diff --git a/core/droiddoc.mk b/core/droiddoc.mk
index 41f135c..417d4fd 100644
--- a/core/droiddoc.mk
+++ b/core/droiddoc.mk
@@ -107,7 +107,7 @@
 define prepare-doc-source-list
 $(hide) mkdir -p $(dir $(1))
 $(call dump-words-to-file, $(2), $(1))
-$(hide) for d in $(3) ; do find $$d -name '*.java' >> $(1) 2> /dev/null ; done ; true
+$(hide) for d in $(3) ; do find $$d -name '*.java' -and -not -name '.*' >> $(1) 2> /dev/null ; done ; true
 endef
 
 ifeq (a,b)
@@ -131,8 +131,8 @@
 	$(HOST_OUT_JAVA_LIBRARIES)/doclava$(COMMON_JAVA_PACKAGE_SUFFIX)
 
 $(full_target): PRIVATE_DOCLETPATH := $(HOST_OUT_JAVA_LIBRARIES)/jsilver$(COMMON_JAVA_PACKAGE_SUFFIX):$(HOST_OUT_JAVA_LIBRARIES)/doclava$(COMMON_JAVA_PACKAGE_SUFFIX)
-$(full_target): PRIVATE_CURRENT_BUILD := -hdf page.build $(BUILD_ID)-$(BUILD_NUMBER)
-$(full_target): PRIVATE_CURRENT_TIME :=  -hdf page.now "$(shell date "+%d %b %Y %k:%M")"
+$(full_target): PRIVATE_CURRENT_BUILD := -hdf page.build $(BUILD_ID)-$(BUILD_NUMBER_FROM_FILE)
+$(full_target): PRIVATE_CURRENT_TIME :=  -hdf page.now "$$(date "+%d %b %Y %k:%M")"
 $(full_target): PRIVATE_CUSTOM_TEMPLATE_DIR := $(LOCAL_DROIDDOC_CUSTOM_TEMPLATE_DIR)
 $(full_target): PRIVATE_IN_CUSTOM_ASSET_DIR := $(LOCAL_DROIDDOC_CUSTOM_TEMPLATE_DIR)/$(LOCAL_DROIDDOC_CUSTOM_ASSET_DIR)
 $(full_target): PRIVATE_OUT_ASSET_DIR := $(out_dir)/$(LOCAL_DROIDDOC_ASSET_DIR)
diff --git a/core/envsetup.mk b/core/envsetup.mk
index 962d269..0b68152 100644
--- a/core/envsetup.mk
+++ b/core/envsetup.mk
@@ -131,10 +131,6 @@
 $(error must be empty or one of: eng user userdebug)
 endif
 
-# Build host as 32-bit for SDK build.
-ifneq ($(filter $(MAKECMDGOALS),win_sdk sdk),)
-HOST_PREFER_32_BIT := true
-endif
 ifdef USE_MINGW
 # We only build sdk host tools in the MinGW windows build.
 # Build it as 32-bit as well.
diff --git a/core/java.mk b/core/java.mk
index 4885d74..f295973 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -251,7 +251,7 @@
 $(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)
diff --git a/core/main.mk b/core/main.mk
index 7f561ab..b290ce1 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -86,6 +86,8 @@
 dont_bother := true
 endif
 
+ORIGINAL_MAKECMDGOALS := $(MAKECMDGOALS)
+
 # Targets that provide quick help on the build system.
 include $(BUILD_SYSTEM)/help.mk
 
@@ -93,6 +95,16 @@
 # and host information.
 include $(BUILD_SYSTEM)/config.mk
 
+ifeq ($(USE_NINJA),true)
+include build/core/ninja.mk
+else # !USE_NINJA
+
+# Write the build number to a file so it can be read back in
+# without changing the command line every time.  Avoids rebuilds
+# when using ninja.
+$(shell mkdir -p $(OUT_DIR) && echo -n $(BUILD_NUMBER) > $(OUT_DIR)/build_number.txt)
+BUILD_NUMBER_FROM_FILE := $$(cat $(OUT_DIR)/build_number.txt)
+
 # CTS-specific config.
 -include cts/build/config.mk
 
@@ -875,7 +887,8 @@
 all_modules: $(ALL_MODULES)
 else
 # BUILD_MODULES_IN_PATHS is a list of paths relative to the top of the tree
-module_path_patterns := $(foreach p, $(BUILD_MODULES_IN_PATHS),\
+build_modules_in_paths := $(patsubst ./%,%,$(BUILD_MODULES_IN_PATHS))
+module_path_patterns := $(foreach p, $(build_modules_in_paths),\
     $(if $(filter %/,$(p)),$(p)%,$(p)/%))
 my_all_modules := $(sort $(foreach m, $(ALL_MODULES),$(if $(filter\
     $(module_path_patterns), $(addsuffix /,$(ALL_MODULES.$(m).PATH))),$(m))))
@@ -1016,8 +1029,6 @@
 endif
 endif
 
-.PHONY: lintall
-
 ifneq (,$(filter samplecode, $(MAKECMDGOALS)))
 .PHONY: samplecode
 sample_MODULES := $(sort $(call get-tagged-modules,samples))
@@ -1061,3 +1072,4 @@
 .PHONY: nothing
 nothing:
 	@echo Successfully read the makefiles.
+endif # !USE_NINJA
diff --git a/core/ninja.mk b/core/ninja.mk
new file mode 100644
index 0000000..de133c5
--- /dev/null
+++ b/core/ninja.mk
@@ -0,0 +1,55 @@
+KATI ?= $(HOST_OUT_EXECUTABLES)/ckati
+
+KATI_OUTPUTS := $(PRODUCT_OUT)/build.ninja $(PRODUCT_OUT)/ninja.sh
+NINJA_GOALS := fastincremental generateonly droid showcommands
+
+ANDROID_TARGETS := $(filter-out $(KATI_OUTPUTS) $(NINJA_GOALS),$(ORIGINAL_MAKECMDGOALS))
+
+ifeq (,$(NINJA_STATUS))
+NINJA_STATUS := [%p %s/%t]$(space)
+endif
+
+ifneq (,$(filter showcommands,$(ORIGINAL_MAKECMDGOALS)))
+NINJA_ARGS += "-v"
+PHONY: showcommands
+showcommands: droid
+endif
+
+ifeq (,$(filter generateonly,$(ORIGINAL_MAKECMDGOALS)))
+fastincremental droid $(ANDROID_TARGETS): ninja.intermediate
+	@#empty
+
+.INTERMEDIATE: ninja.intermediate
+ninja.intermediate: $(KATI_OUTPUTS)
+	@echo Starting build with ninja
+	$(hide) PATH=prebuilts/ninja/$(HOST_PREBUILT_TAG)/:$$PATH NINJA_STATUS="$(NINJA_STATUS)" $(PRODUCT_OUT)/ninja.sh -C $(TOP) $(NINJA_ARGS) $(ANDROID_TARGETS)
+else
+generateonly droid $(ANDROID_TARGETS): $(KATI_OUTPUTS)
+	@#empty
+endif
+
+ifeq (,$(filter fastincremental,$(ORIGINAL_MAKECMDGOALS)))
+KATI_FORCE := FORCE
+endif
+
+$(KATI_OUTPUTS): kati.intermediate $(KATI_FORCE)
+
+.INTERMEDIATE: kati.intermediate
+kati.intermediate: $(KATI)
+	@echo Running kati to generate build.ninja...
+	@#TODO: use separate ninja file for mm or single target build
+	$(hide) $(KATI) --ninja --ninja_dir=$(PRODUCT_OUT) --ignore_optional_include=$(OUT_DIR)/%.P --detect_android_echo --use_find_emulator -f build/core/main.mk $(ANDROID_TARGETS) USE_NINJA=false
+
+KATI_CXX := $(CLANG_CXX) $(CLANG_HOST_GLOBAL_CPPFLAGS)
+KATI_LD := $(CLANG_CXX) $(CLANG_HOST_GLOBAL_LDFLAGS)
+# Build static ckati. Unfortunately Mac OS X doesn't officially support static exectuables.
+ifeq ($(BUILD_OS),linux)
+KATI_LD += -static
+endif
+
+KATI_INTERMEDIATES_PATH := $(HOST_OUT_INTERMEDIATES)/EXECUTABLES/ckati_intermediates
+KATI_BIN_PATH := $(HOST_OUT_EXECUTABLES)
+include build/kati/Makefile.ckati
+
+.PHONY: FORCE
+FORCE:
diff --git a/core/package_internal.mk b/core/package_internal.mk
index fee484f..4f3c339 100644
--- a/core/package_internal.mk
+++ b/core/package_internal.mk
@@ -510,39 +510,6 @@
 
 PACKAGES := $(PACKAGES) $(LOCAL_PACKAGE_NAME)
 
-# Dist the files that can be bundled in system.img.
-# They include the jni shared libraries and the apk with jni libraries stripped.
-ifeq ($(LOCAL_DIST_BUNDLED_BINARIES),true)
-ifneq ($(filter $(LOCAL_PACKAGE_NAME),$(TARGET_BUILD_APPS)),)
-ifneq ($(strip $(jni_shared_libraries)),)
-dist_subdir := bundled_$(LOCAL_PACKAGE_NAME)
-$(foreach f, $(jni_shared_libraries), \
-  $(call dist-for-goals, apps_only, $(f):$(dist_subdir)/$(notdir $(f))))
-
-apk_jni_stripped := $(intermediates)/jni_stripped/package.apk
-$(apk_jni_stripped): PRIVATE_JNI_SHARED_LIBRARIES := $(notdir $(jni_shared_libraries))
-$(apk_jni_stripped) : $(LOCAL_BUILT_MODULE) | $(ZIPALIGN)
-	@rm -rf $(dir $@) && mkdir -p $(dir $@)
-	$(hide) cp $< $@
-	$(hide) zip -d $@ $(foreach f,$(PRIVATE_JNI_SHARED_LIBRARIES),\*/$(f))
-	$(align-package)
-
-$(call dist-for-goals, apps_only, $(apk_jni_stripped):$(dist_subdir)/$(LOCAL_PACKAGE_NAME).apk)
-
-endif  # jni_shared_libraries
-endif  # apps_only build
-endif  # LOCAL_DIST_BUNDLED_BINARIES
-
-# Lint phony targets
-.PHONY: lint-$(LOCAL_PACKAGE_NAME)
-lint-$(LOCAL_PACKAGE_NAME): PRIVATE_PATH := $(LOCAL_PATH)
-lint-$(LOCAL_PACKAGE_NAME): PRIVATE_LINT_FLAGS := $(LOCAL_LINT_FLAGS)
-lint-$(LOCAL_PACKAGE_NAME) :
-	@echo lint $(PRIVATE_PATH)
-	$(LINT) $(PRIVATE_LINT_FLAGS) $(PRIVATE_PATH)
-
-lintall : lint-$(LOCAL_PACKAGE_NAME)
-
 endif # skip_definition
 
 # Reset internal variables.
diff --git a/core/pathmap.mk b/core/pathmap.mk
index 2532707..38306f4 100644
--- a/core/pathmap.mk
+++ b/core/pathmap.mk
@@ -16,7 +16,14 @@
 
 #
 # A central place to define mappings to paths, to avoid hard-coding
-# them in Android.mk files.
+# them in Android.mk files. Not meant for header file include directories,
+# despite the fact that it was historically used for that!
+#
+# If you want this for a library's header files, use LOCAL_EXPORT_C_INCLUDES
+# instead. Then users of the library don't have to do anything --- they'll
+# have the correct header files added to their include path automatically.
+#
+
 #
 # TODO: Allow each project to define stuff like this before the per-module
 #       Android.mk files are included, so we don't need to have a big central
@@ -30,16 +37,12 @@
     camera:system/media/camera/include \
     frameworks-base:frameworks/base/include \
     frameworks-native:frameworks/native/include \
-    libc:bionic/libc/include \
     libhardware:hardware/libhardware/include \
     libhardware_legacy:hardware/libhardware_legacy/include \
     libhost:build/libs/host/include \
-    libm:bionic/libm/include \
     libnativehelper:libnativehelper/include \
     libpagemap:system/extras/libpagemap/include \
     libril:hardware/ril/include \
-    libstdc++:bionic/libstdc++/include \
-    mkbootimg:system/core/mkbootimg \
     opengl-tests-includes:frameworks/native/opengl/tests/include \
     recovery:bootable/recovery \
     system-core:system/core/include \
diff --git a/core/post_clean.mk b/core/post_clean.mk
index 0273ff2..7fafe4a 100644
--- a/core/post_clean.mk
+++ b/core/post_clean.mk
@@ -88,7 +88,7 @@
 $(shell echo 'MODULES_WITH_AIDL_FILES := $(MODULES_WITH_AIDL_FILES)' >> $(current_aidl_config))
 
 # Now current becomes previous.
-$(shell mv -f $(current_aidl_config) $(previous_aidl_config))
+$(shell cmp $(current_aidl_config) $(previous_aidl_config) > /dev/null 2>&1 || mv -f $(current_aidl_config) $(previous_aidl_config))
 
 MODULES_WITH_AIDL_FILES :=
 modules_with_aidl_files :=
diff --git a/envsetup.sh b/envsetup.sh
index 65a536e..3c29e88 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -15,6 +15,7 @@
 - jgrep:   Greps on all local Java files.
 - resgrep: Greps on all local res/*.xml files.
 - mangrep: Greps on all local AndroidManifest.xml files.
+- mgrep:   Greps on all local Makefiles files.
 - sepgrep: Greps on all local sepolicy files.
 - sgrep:   Greps on all local source files.
 - godir:   Go to the directory containing a file.
@@ -197,6 +198,7 @@
     fi
 
     export PATH=$ANDROID_BUILD_PATHS$PATH
+    export PYTHONPATH=$T/system/core:$PYTHONPATH
 
     unset ANDROID_JAVA_TOOLCHAIN
     unset ANDROID_PRE_BUILD_PATHS
diff --git a/libs/host/include/host/Directories.h b/libs/host/include/host/Directories.h
deleted file mode 100644
index fccce46..0000000
--- a/libs/host/include/host/Directories.h
+++ /dev/null
@@ -1,10 +0,0 @@
-#ifndef HOST_MKDIRS_H
-#define HOST_MKDIRS_H
-
-#include <string>
-
-std::string parent_dir(const std::string& path);
-
-extern "C" int mkdirs(const char* path);
-
-#endif // HOST_MKDIRS_H
diff --git a/target/board/generic/sepolicy/file_contexts b/target/board/generic/sepolicy/file_contexts
index d057dc3..e626d9d 100644
--- a/target/board/generic/sepolicy/file_contexts
+++ b/target/board/generic/sepolicy/file_contexts
@@ -1,11 +1,12 @@
-/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
+/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
+/dev/ttyS2                   u:object_r:console_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
-/system/bin/qemu-props	     u:object_r:qemu_props_exec:s0
+/system/bin/qemu-props       u:object_r:qemu_props_exec:s0
diff --git a/target/board/generic_arm64/BoardConfig.mk b/target/board/generic_arm64/BoardConfig.mk
index 4b6136d..0c4d59c 100644
--- a/target/board/generic_arm64/BoardConfig.mk
+++ b/target/board/generic_arm64/BoardConfig.mk
@@ -76,7 +76,7 @@
 USE_OPENGL_RENDERER := true
 
 TARGET_USERIMAGES_USE_EXT4 := true
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1073741824
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1258291200
 BOARD_USERDATAIMAGE_PARTITION_SIZE := 576716800
 BOARD_CACHEIMAGE_PARTITION_SIZE := 69206016
 BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
diff --git a/target/product/core.mk b/target/product/core.mk
index 519dbb8..d32acbc 100644
--- a/target/product/core.mk
+++ b/target/product/core.mk
@@ -22,7 +22,8 @@
 
 PRODUCT_PACKAGES += \
     BasicDreams \
-    Browser \
+    BookmarkProvider \
+    Browser2 \
     Calculator \
     Calendar \
     CalendarProvider \
diff --git a/target/product/embedded.mk b/target/product/embedded.mk
index c40de4f..468fbe5 100644
--- a/target/product/embedded.mk
+++ b/target/product/embedded.mk
@@ -75,7 +75,7 @@
 # SELinux packages
 PRODUCT_PACKAGES += \
     sepolicy \
-    file_contexts \
+    file_contexts.bin \
     seapp_contexts \
     property_contexts \
     mac_permissions.xml \
diff --git a/tools/buildinfo.sh b/tools/buildinfo.sh
index dcd9ab5..1fb203a 100755
--- a/tools/buildinfo.sh
+++ b/tools/buildinfo.sh
@@ -17,6 +17,9 @@
 echo "ro.build.host=`hostname`"
 echo "ro.build.tags=$BUILD_VERSION_TAGS"
 echo "ro.build.flavor=$TARGET_BUILD_FLAVOR"
+if [ -n "$BOARD_BUILD_SYSTEM_ROOT_IMAGE" ] ; then
+  echo "ro.build.system_root_image=$BOARD_BUILD_SYSTEM_ROOT_IMAGE"
+fi
 echo "ro.product.model=$PRODUCT_MODEL"
 echo "ro.product.brand=$PRODUCT_BRAND"
 echo "ro.product.name=$PRODUCT_NAME"
diff --git a/tools/droiddoc/templates-sac/assets/css/default.css b/tools/droiddoc/templates-sac/assets/css/default.css
index c1a0c19..3e4b539 100644
--- a/tools/droiddoc/templates-sac/assets/css/default.css
+++ b/tools/droiddoc/templates-sac/assets/css/default.css
@@ -408,7 +408,7 @@
 .content-header.just-links {
   margin-bottom:0;
   padding-bottom:0;}
-    
+ 
 .content-header h1 {
   color:#000;
   margin:0;
@@ -420,8 +420,12 @@
   border-top: 1px solid #ccc;
   margin-top: 10px;
   padding-top:10px;
-  height: 30px; }
+  height: 30px;
+}
 
+.content-footer-sac {
+  border-top: 1px solid #ccc;
+}
 .content-footer .col-9 {
   margin-left:0;
 }
@@ -4457,6 +4461,11 @@
   float:right;
 }
 
+.feedback {
+  float:right !important;
+  margin: 0 0 0 10px;
+  font-size: 14px;
+}
 
 
 /************* HOME/LANDING PAGE *****************/
diff --git a/tools/droiddoc/templates-sac/docpage.cs b/tools/droiddoc/templates-sac/docpage.cs
index 3e5c24f..3d120b6 100644
--- a/tools/droiddoc/templates-sac/docpage.cs
+++ b/tools/droiddoc/templates-sac/docpage.cs
@@ -34,7 +34,7 @@
             ru-lang="Предыдущий"
             ko-lang="이전"
             ja-lang="前へ"
-            es-lang="Anterior"               
+            es-lang="Anterior"
             >Previous</a>
         <a href="#" class="next-page-link hide"
             zh-TW-lang="下一堂課"
@@ -42,7 +42,7 @@
             ru-lang="Следующий"
             ko-lang="다음"
             ja-lang="次へ"
-            es-lang="Siguiente"               
+            es-lang="Siguiente"
             >Next</a>
         <a href="#" class="start-class-link hide"
             zh-TW-lang="開始上課"
@@ -50,7 +50,7 @@
             ru-lang="Начало работы"
             ko-lang="시작하기"
             ja-lang="開始する"
-            es-lang="Empezar"               
+            es-lang="Empezar"
             >Get started</a>
       </div>
     <?cs elif:!page.trainingcourse ?>
@@ -61,7 +61,7 @@
             ru-lang="Предыдущий"
             ko-lang="이전"
             ja-lang="前へ"
-            es-lang="Anterior"               
+            es-lang="Anterior"
             >Previous</a>
         <a href="#" class="next-page-link hide"
             zh-TW-lang="下一堂課"
@@ -69,7 +69,7 @@
             ru-lang="Следующий"
             ko-lang="다음"
             ja-lang="次へ"
-            es-lang="Siguiente"               
+            es-lang="Siguiente"
             >Next</a>
       </div>
     <?cs /if ?><?cs # end if training ?>
@@ -87,7 +87,6 @@
         <?cs /if ?>
           <h1 itemprop="name" style="margin-bottom:0;"><?cs var:page.title ?></h1>
           <p itemprop="description"><?cs var:page.landing.intro ?></p>
-          
           <p><a class="next-page-link topic-start-link"></a></p>
         <?cs if:page.landing.image ?>
         </div>
@@ -112,22 +111,16 @@
   <?cs # THIS IS THE MAIN DOC CONTENT ?>
   <div id="jd-content">
 
-
     <div class="jd-descr" itemprop="articleBody">
     <?cs call:tag_list(root.descr) ?>
     </div>
-      
-      <div class="content-footer <?cs 
-                    if:fullpage ?>wrap<?cs
-                    else ?>layout-content-row<?cs /if ?>" 
+
+      <div class="content-footer-sac"
                     itemscope itemtype="http://schema.org/SiteNavigationElement">
         <div class="layout-content-col <?cs 
                     if:fullpage ?>col-16<?cs 
                     elif:training||guide ?>col-8<?cs 
                     else ?>col-9<?cs /if ?>" style="padding-top:4px">
-          <?cs if:!page.noplus ?><?cs if:fullpage ?><style>#___plusone_0 {float:right !important;}</style><?cs /if ?>
-            <div class="g-plusone" data-size="medium"></div>
-          <?cs /if ?>
         </div>
         <?cs if:!fullscreen ?>
         <div class="paging-links layout-content-col col-4">
@@ -138,7 +131,7 @@
                 ru-lang="Предыдущий"
                 ko-lang="이전"
                 ja-lang="前へ"
-                es-lang="Anterior"               
+                es-lang="Anterior"
                 >Previous</a>
             <a href="#" class="next-page-link hide"
                 zh-TW-lang="下一堂課"
@@ -146,23 +139,20 @@
                 ru-lang="Следующий"
                 ko-lang="다음"
                 ja-lang="次へ"
-                es-lang="Siguiente"               
+                es-lang="Siguiente"
                 >Next</a>
           <?cs /if ?>
         </div>
         <?cs /if ?>
       </div>
-      
       <?cs # for training classes, provide a different kind of link when the next page is a different class ?>
       <?cs if:training && !page.article ?>
       <div class="layout-content-row content-footer next-class" style="display:none" itemscope itemtype="http://schema.org/SiteNavigationElement">
           <a href="#" class="next-class-link hide">Next class: </a>
       </div>
       <?cs /if ?>
-
-  </div> <!-- end jd-content -->
-
-<?cs include:"footer.cs" ?>
+    </div> <!-- end jd-content -->
+  <?cs include:"footer.cs" ?>
 </div><!-- end doc-content -->
 
 <?cs include:"trailer.cs" ?>
diff --git a/tools/droiddoc/templates-sac/footer.cs b/tools/droiddoc/templates-sac/footer.cs
index 6979ca0..ea22605 100644
--- a/tools/droiddoc/templates-sac/footer.cs
+++ b/tools/droiddoc/templates-sac/footer.cs
@@ -1,4 +1,9 @@
 <div id="footer" class="wrap" <?cs if:fullpage ?>style="width:940px"<?cs /if ?>>
+  <style>.feedback { float: right !Important }</style>
+  <div class="feedback">
+    <a href="#" class="button" onclick=" try {
+      userfeedback.api.startFeedback({'productId':'715571','authuser':'1'});return false;}catch(e){}">Send Feedback</a>
+  </div>
   <div id="copyright">
     <?cs call:custom_cc_copyright() ?>
   </div>
diff --git a/tools/droiddoc/templates-sac/head_tag.cs b/tools/droiddoc/templates-sac/head_tag.cs
index 5cee68c..b672b25 100644
--- a/tools/droiddoc/templates-sac/head_tag.cs
+++ b/tools/droiddoc/templates-sac/head_tag.cs
@@ -46,6 +46,8 @@
 <script src="<?cs var:toroot ?>navtree_data.js" async type="text/javascript"></script>
 <?cs /if ?>
 
+<script type="text/javascript" src="//www.gstatic.com/feedback/api.js"></script>
+
 <script type="text/javascript">
   var _gaq = _gaq || [];
   _gaq.push(['_setAccount', 'UA-45455297-1']);
diff --git a/tools/releasetools/add_img_to_target_files.py b/tools/releasetools/add_img_to_target_files.py
index dee5a69..bc2667d 100755
--- a/tools/releasetools/add_img_to_target_files.py
+++ b/tools/releasetools/add_img_to_target_files.py
@@ -130,21 +130,11 @@
   if not os.path.exists(fs_config):
     fs_config = None
 
-  fc_config = os.path.join(input_dir, "BOOT/RAMDISK/file_contexts")
-  if not os.path.exists(fc_config):
-    fc_config = None
-
   # Override values loaded from info_dict.
   if fs_config:
     image_props["fs_config"] = fs_config
-  if fc_config:
-    image_props["selinux_fc"] = fc_config
   if block_list:
     image_props["block_list"] = block_list
-  if image_props.get("system_root_image") == "true":
-    image_props["ramdisk_dir"] = os.path.join(input_dir, "BOOT/RAMDISK")
-    image_props["ramdisk_fs_config"] = os.path.join(
-        input_dir, "META/boot_filesystem_config.txt")
 
   succ = build_image.BuildImage(os.path.join(input_dir, what),
                                 image_props, img)
@@ -167,8 +157,7 @@
     print "userdata.img already exists in %s, no need to rebuild..." % (prefix,)
     return
 
-  image_props = build_image.ImagePropFromGlobalDict(OPTIONS.info_dict,
-                                                    "data")
+  image_props = build_image.ImagePropFromGlobalDict(OPTIONS.info_dict, "data")
   # We only allow yaffs to have a 0/missing partition_size.
   # Extfs, f2fs must have a size. Skip userdata.img if no size.
   if (not image_props.get("fs_type", "").startswith("yaffs") and
@@ -214,8 +203,7 @@
     print "cache.img already exists in %s, no need to rebuild..." % (prefix,)
     return
 
-  image_props = build_image.ImagePropFromGlobalDict(OPTIONS.info_dict,
-                                                    "cache")
+  image_props = build_image.ImagePropFromGlobalDict(OPTIONS.info_dict, "cache")
   # The build system has to explicitly request for cache.img.
   if "fs_type" not in image_props:
     return
@@ -258,10 +246,7 @@
   except KeyError:
     has_vendor = False
 
-  OPTIONS.info_dict = common.LoadInfoDict(input_zip)
-  if "selinux_fc" in OPTIONS.info_dict:
-    OPTIONS.info_dict["selinux_fc"] = os.path.join(
-        OPTIONS.input_tmp, "BOOT", "RAMDISK", "file_contexts")
+  OPTIONS.info_dict = common.LoadInfoDict(input_zip, OPTIONS.input_tmp)
 
   common.ZipClose(input_zip)
   output_zip = zipfile.ZipFile(filename, "a",
diff --git a/tools/releasetools/blockimgdiff.py b/tools/releasetools/blockimgdiff.py
index 3402572..e042e03 100644
--- a/tools/releasetools/blockimgdiff.py
+++ b/tools/releasetools/blockimgdiff.py
@@ -16,6 +16,7 @@
 
 from collections import deque, OrderedDict
 from hashlib import sha1
+import common
 import heapq
 import itertools
 import multiprocessing
@@ -83,6 +84,7 @@
   blocksize = 4096
   care_map = RangeSet()
   clobbered_blocks = RangeSet()
+  extended = RangeSet()
   total_blocks = 0
   file_map = {}
   def ReadRangeSet(self, ranges):
@@ -119,6 +121,7 @@
     self.total_blocks = len(self.data) / self.blocksize
     self.care_map = RangeSet(data=(0, self.total_blocks))
     self.clobbered_blocks = RangeSet()
+    self.extended = RangeSet()
 
     zero_blocks = []
     nonzero_blocks = []
@@ -347,6 +350,12 @@
           mapped_stashes.append(sr)
           if self.version == 2:
             src_str.append("%d:%s" % (sid, sr.to_string_raw()))
+            # A stash will be used only once. We need to free the stash
+            # immediately after the use, instead of waiting for the automatic
+            # clean-up at the end. Because otherwise it may take up extra space
+            # and lead to OTA failures.
+            # Bug: 23119955
+            free_string.append("free %d\n" % (sid,))
           else:
             assert sh in stashes
             src_str.append("%s:%s" % (sh, sr.to_string_raw()))
@@ -411,7 +420,7 @@
           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
 
@@ -435,7 +444,7 @@
         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
 
@@ -458,22 +467,32 @@
       if free_string:
         out.append("".join(free_string))
 
-      # sanity check: abort if we're going to need more than 512 MB if
-      # stash space
-      assert max_stashed_blocks * self.tgt.blocksize < (512 << 20)
+      if self.version >= 2 and common.OPTIONS.cache_size is not None:
+        # Sanity check: abort if we're going to need more stash space than
+        # the allowed size (cache_size * threshold). There are two purposes
+        # of having a threshold here. a) Part of the cache may have been
+        # occupied by some recovery logs. b) It will buy us some time to deal
+        # with the oversize issue.
+        cache_size = common.OPTIONS.cache_size
+        stash_threshold = common.OPTIONS.stash_threshold
+        max_allowed = cache_size * stash_threshold
+        assert max_stashed_blocks * self.tgt.blocksize < max_allowed, \
+               'Stash size %d (%d * %d) exceeds the limit %d (%d * %.2f)' % (
+                   max_stashed_blocks * self.tgt.blocksize, max_stashed_blocks,
+                   self.tgt.blocksize, max_allowed, cache_size,
+                   stash_threshold)
 
+    # 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")
@@ -488,8 +507,17 @@
         f.write(i)
 
     if self.version >= 2:
-      print("max stashed blocks: %d  (%d bytes)\n" % (
-          max_stashed_blocks, max_stashed_blocks * self.tgt.blocksize))
+      max_stashed_size = max_stashed_blocks * self.tgt.blocksize
+      OPTIONS = common.OPTIONS
+      if OPTIONS.cache_size is not None:
+        max_allowed = OPTIONS.cache_size * OPTIONS.stash_threshold
+        print("max stashed blocks: %d  (%d bytes), "
+              "limit: %d bytes (%.2f%%)\n" % (
+              max_stashed_blocks, max_stashed_size, max_allowed,
+              max_stashed_size * 100.0 / max_allowed))
+      else:
+        print("max stashed blocks: %d  (%d bytes), limit: <unknown>\n" % (
+              max_stashed_blocks, max_stashed_size))
 
   def ComputePatches(self, prefix):
     print("Reticulating splines...")
diff --git a/tools/releasetools/build_image.py b/tools/releasetools/build_image.py
index 8934c77..bf5d9dd 100755
--- a/tools/releasetools/build_image.py
+++ b/tools/releasetools/build_image.py
@@ -275,6 +275,10 @@
     build_command.extend(["-m", prop_dict["mount_point"]])
     if "selinux_fc" in prop_dict:
       build_command.extend(["-c", prop_dict["selinux_fc"]])
+    if "squashfs_compressor" in prop_dict:
+      build_command.extend(["-z", prop_dict["squashfs_compressor"]])
+    if "squashfs_compressor_opt" in prop_dict:
+      build_command.extend(["-zo", prop_dict["squashfs_compressor_opt"]])
   elif fs_type.startswith("f2fs"):
     build_command = ["mkf2fsuserimg.sh"]
     build_command.extend([out_file, prop_dict["partition_size"]])
@@ -413,7 +417,10 @@
     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("ramdisk_fs_config", "ramdisk_fs_config")
     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":
     # Copy the generic fs type first, override with specific one if available.
     copy_prop("fs_type", "fs_type")
diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index 4bae9ca..d56c0fd 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -57,6 +57,9 @@
     self.extras = {}
     self.info_dict = None
     self.worker_threads = None
+    # Stash size cannot exceed cache_size * threshold.
+    self.cache_size = None
+    self.stash_threshold = 0.8
 
 
 OPTIONS = Options()
@@ -94,7 +97,7 @@
       pass
 
 
-def LoadInfoDict(input_file):
+def LoadInfoDict(input_file, input_dir=None):
   """Read and parse the META/misc_info.txt key/value pairs from the
   input target files and return a dict."""
 
@@ -145,6 +148,34 @@
   if "fstab_version" not in d:
     d["fstab_version"] = "1"
 
+  # A few properties are stored as links to the files in the out/ directory.
+  # It works fine with the build system. However, they are no longer available
+  # when (re)generating from target_files zip. If input_dir is not None, we
+  # are doing repacking. Redirect those properties to the actual files in the
+  # unzipped directory.
+  if input_dir is not None:
+    # We carry a copy of file_contexts.bin under META/. If not available,
+    # search BOOT/RAMDISK/. Note that sometimes we may need a different file
+    # to build images than the one running on device, such as when enabling
+    # system_root_image. In that case, we must have the one for image
+    # generation copied to META/.
+    fc_config = os.path.join(input_dir, "META", "file_contexts.bin")
+    if d.get("system_root_image") == "true":
+      assert os.path.exists(fc_config)
+    if not os.path.exists(fc_config):
+      fc_config = os.path.join(input_dir, "BOOT", "RAMDISK", "file_contexts.bin")
+      if not os.path.exists(fc_config):
+        fc_config = None
+
+    if fc_config:
+      d["selinux_fc"] = fc_config
+
+    # Similarly we need to redirect "ramdisk_dir" and "ramdisk_fs_config".
+    if d.get("system_root_image") == "true":
+      d["ramdisk_dir"] = os.path.join(input_dir, "ROOT")
+      d["ramdisk_fs_config"] = os.path.join(
+          input_dir, "META", "root_filesystem_config.txt")
+
   try:
     data = read_helper("META/imagesizes.txt")
     for line in data.split("\n"):
@@ -174,7 +205,8 @@
   makeint("boot_size")
   makeint("fstab_version")
 
-  d["fstab"] = LoadRecoveryFSTab(read_helper, d["fstab_version"])
+  d["fstab"] = LoadRecoveryFSTab(read_helper, d["fstab_version"],
+                                 d.get("system_root_image", False))
   d["build.prop"] = LoadBuildProp(read_helper)
   return d
 
@@ -197,7 +229,7 @@
       d[name] = value
   return d
 
-def LoadRecoveryFSTab(read_helper, fstab_version):
+def LoadRecoveryFSTab(read_helper, fstab_version, system_root_image=False):
   class Partition(object):
     def __init__(self, mount_point, fs_type, device, length, device2, context):
       self.mount_point = mount_point
@@ -289,6 +321,12 @@
   else:
     raise ValueError("Unknown fstab_version: \"%d\"" % (fstab_version,))
 
+  # / is used for the system mount point when the root directory is included in
+  # system. Other areas assume system is always at "/system" so point /system
+  # at /.
+  if system_root_image:
+    assert not d.has_key("/system") and d.has_key("/")
+    d["/system"] = d["/"]
   return d
 
 
@@ -297,34 +335,46 @@
     print "%-25s = (%s) %s" % (k, type(v).__name__, v)
 
 
-def BuildBootableImage(sourcedir, fs_config_file, info_dict=None):
-  """Take a kernel, cmdline, and ramdisk directory from the input (in
-  'sourcedir'), and turn them into a boot image.  Return the image
-  data, or None if sourcedir does not appear to contains files for
-  building the requested image."""
+def _BuildBootableImage(sourcedir, fs_config_file, info_dict=None,
+                        has_ramdisk=False):
+  """Build a bootable image from the specified sourcedir.
 
-  if (not os.access(os.path.join(sourcedir, "RAMDISK"), os.F_OK) or
-      not os.access(os.path.join(sourcedir, "kernel"), os.F_OK)):
+  Take a kernel, cmdline, and optionally a ramdisk directory from the input (in
+  'sourcedir'), and turn them into a boot image.  Return the image data, or
+  None if sourcedir does not appear to contains files for building the
+  requested image."""
+
+  def make_ramdisk():
+    ramdisk_img = tempfile.NamedTemporaryFile()
+
+    if os.access(fs_config_file, os.F_OK):
+      cmd = ["mkbootfs", "-f", fs_config_file,
+             os.path.join(sourcedir, "RAMDISK")]
+    else:
+      cmd = ["mkbootfs", os.path.join(sourcedir, "RAMDISK")]
+    p1 = Run(cmd, stdout=subprocess.PIPE)
+    p2 = Run(["minigzip"], stdin=p1.stdout, stdout=ramdisk_img.file.fileno())
+
+    p2.wait()
+    p1.wait()
+    assert p1.returncode == 0, "mkbootfs of %s ramdisk failed" % (sourcedir,)
+    assert p2.returncode == 0, "minigzip of %s ramdisk failed" % (sourcedir,)
+
+    return ramdisk_img
+
+  if not os.access(os.path.join(sourcedir, "kernel"), os.F_OK):
+    return None
+
+  if has_ramdisk and not os.access(os.path.join(sourcedir, "RAMDISK"), os.F_OK):
     return None
 
   if info_dict is None:
     info_dict = OPTIONS.info_dict
 
-  ramdisk_img = tempfile.NamedTemporaryFile()
   img = tempfile.NamedTemporaryFile()
 
-  if os.access(fs_config_file, os.F_OK):
-    cmd = ["mkbootfs", "-f", fs_config_file, os.path.join(sourcedir, "RAMDISK")]
-  else:
-    cmd = ["mkbootfs", os.path.join(sourcedir, "RAMDISK")]
-  p1 = Run(cmd, stdout=subprocess.PIPE)
-  p2 = Run(["minigzip"],
-           stdin=p1.stdout, stdout=ramdisk_img.file.fileno())
-
-  p2.wait()
-  p1.wait()
-  assert p1.returncode == 0, "mkbootfs of %s ramdisk failed" % (sourcedir,)
-  assert p2.returncode == 0, "minigzip of %s ramdisk failed" % (sourcedir,)
+  if has_ramdisk:
+    ramdisk_img = make_ramdisk()
 
   # use MKBOOTIMG from environ, or "mkbootimg" if empty or not set
   mkbootimg = os.getenv('MKBOOTIMG') or "mkbootimg"
@@ -355,14 +405,15 @@
   if args and args.strip():
     cmd.extend(shlex.split(args))
 
+  if has_ramdisk:
+    cmd.extend(["--ramdisk", ramdisk_img.name])
+
   img_unsigned = None
   if info_dict.get("vboot", None):
     img_unsigned = tempfile.NamedTemporaryFile()
-    cmd.extend(["--ramdisk", ramdisk_img.name,
-                "--output", img_unsigned.name])
+    cmd.extend(["--output", img_unsigned.name])
   else:
-    cmd.extend(["--ramdisk", ramdisk_img.name,
-                "--output", img.name])
+    cmd.extend(["--output", img.name])
 
   p = Run(cmd, stdout=subprocess.PIPE)
   p.communicate()
@@ -397,7 +448,8 @@
   img.seek(os.SEEK_SET, 0)
   data = img.read()
 
-  ramdisk_img.close()
+  if has_ramdisk:
+    ramdisk_img.close()
   img.close()
 
   return data
@@ -405,11 +457,11 @@
 
 def GetBootableImage(name, prebuilt_name, unpack_dir, tree_subdir,
                      info_dict=None):
-  """Return a File object (with name 'name') with the desired bootable
-  image.  Look for it in 'unpack_dir'/BOOTABLE_IMAGES under the name
-  'prebuilt_name', otherwise look for it under 'unpack_dir'/IMAGES,
-  otherwise construct it from the source files in
-  'unpack_dir'/'tree_subdir'."""
+  """Return a File object with the desired bootable image.
+
+  Look for it in 'unpack_dir'/BOOTABLE_IMAGES under the name 'prebuilt_name',
+  otherwise look for it under 'unpack_dir'/IMAGES, otherwise construct it from
+  the source files in 'unpack_dir'/'tree_subdir'."""
 
   prebuilt_path = os.path.join(unpack_dir, "BOOTABLE_IMAGES", prebuilt_name)
   if os.path.exists(prebuilt_path):
@@ -422,10 +474,18 @@
     return File.FromLocalFile(name, prebuilt_path)
 
   print "building image from target_files %s..." % (tree_subdir,)
+
+  if info_dict is None:
+    info_dict = OPTIONS.info_dict
+
+  # With system_root_image == "true", we don't pack ramdisk into the boot image.
+  has_ramdisk = (info_dict.get("system_root_image", None) != "true" or
+                 prebuilt_name != "boot.img")
+
   fs_config = "META/" + tree_subdir.lower() + "_filesystem_config.txt"
-  data = BuildBootableImage(os.path.join(unpack_dir, tree_subdir),
-                            os.path.join(unpack_dir, fs_config),
-                            info_dict)
+  data = _BuildBootableImage(os.path.join(unpack_dir, tree_subdir),
+                             os.path.join(unpack_dir, fs_config),
+                             info_dict, has_ramdisk)
   if data:
     return File(name, data)
   return None
@@ -891,7 +951,7 @@
     zinfo = zipfile.ZipInfo(filename=zinfo_or_arcname)
     zinfo.compress_type = zip_file.compression
     if perms is None:
-      perms = 0o644
+      perms = 0o100644
   else:
     zinfo = zinfo_or_arcname
 
@@ -901,6 +961,9 @@
 
   # If perms is given, it has a priority.
   if perms is not None:
+    # If perms doesn't set the file type, mark it as a regular file.
+    if perms & 0o770000 == 0:
+      perms |= 0o100000
     zinfo.external_attr = perms << 16
 
   # Use a fixed timestamp so the output is repeatable.
@@ -1240,7 +1303,23 @@
     script.AppendExtra('if range_sha1("%s", "%s") == "%s" then' % (
                        self.device, ranges_str,
                        self.tgt.TotalSha1(include_clobbered_blocks=True)))
-    script.Print('Verified the updated %s image.' % (partition,))
+
+    # 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'
@@ -1273,6 +1352,15 @@
 
     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.
@@ -1339,18 +1427,25 @@
   if info_dict is None:
     info_dict = OPTIONS.info_dict
 
-  diff_program = ["imgdiff"]
-  path = os.path.join(input_dir, "SYSTEM", "etc", "recovery-resource.dat")
-  if os.path.exists(path):
-    diff_program.append("-b")
-    diff_program.append(path)
-    bonus_args = "-b /system/etc/recovery-resource.dat"
-  else:
-    bonus_args = ""
+  full_recovery_image = info_dict.get("full_recovery_image", None) == "true"
+  system_root_image = info_dict.get("system_root_image", None) == "true"
 
-  d = Difference(recovery_img, boot_img, diff_program=diff_program)
-  _, _, patch = d.ComputePatch()
-  output_sink("recovery-from-boot.p", patch)
+  if full_recovery_image:
+    output_sink("etc/recovery.img", recovery_img.data)
+
+  else:
+    diff_program = ["imgdiff"]
+    path = os.path.join(input_dir, "SYSTEM", "etc", "recovery-resource.dat")
+    if os.path.exists(path):
+      diff_program.append("-b")
+      diff_program.append(path)
+      bonus_args = "-b /system/etc/recovery-resource.dat"
+    else:
+      bonus_args = ""
+
+    d = Difference(recovery_img, boot_img, diff_program=diff_program)
+    _, _, patch = d.ComputePatch()
+    output_sink("recovery-from-boot.p", patch)
 
   try:
     boot_type, boot_device = GetTypeAndDevice("/boot", info_dict)
@@ -1358,7 +1453,19 @@
   except KeyError:
     return
 
-  sh = """#!/system/bin/sh
+  if full_recovery_image:
+    sh = """#!/system/bin/sh
+if ! applypatch -c %(type)s:%(device)s:%(size)d:%(sha1)s; then
+  applypatch /system/etc/recovery.img %(type)s:%(device)s %(sha1)s %(size)d && log -t recovery "Installing new recovery image: succeeded" || log -t recovery "Installing new recovery image: failed"
+else
+  log -t recovery "Recovery image already installed"
+fi
+""" % {'type': recovery_type,
+       'device': recovery_device,
+       'sha1': recovery_img.sha1,
+       'size': recovery_img.size}
+  else:
+    sh = """#!/system/bin/sh
 if ! applypatch -c %(recovery_type)s:%(recovery_device)s:%(recovery_size)d:%(recovery_sha1)s; then
   applypatch %(bonus_args)s %(boot_type)s:%(boot_device)s:%(boot_size)d:%(boot_sha1)s %(recovery_type)s:%(recovery_device)s %(recovery_sha1)s %(recovery_size)d %(boot_sha1)s:/system/recovery-from-boot.p && log -t recovery "Installing new recovery image: succeeded" || log -t recovery "Installing new recovery image: failed"
 else
@@ -1379,7 +1486,10 @@
   # target-files expects it to be, and put it there.
   sh_location = "etc/install-recovery.sh"
   found = False
-  init_rc_dir = os.path.join(input_dir, "BOOT", "RAMDISK")
+  if system_root_image:
+    init_rc_dir = os.path.join(input_dir, "ROOT")
+  else:
+    init_rc_dir = os.path.join(input_dir, "BOOT", "RAMDISK")
   init_rc_files = os.listdir(init_rc_dir)
   for init_rc_file in init_rc_files:
     if (not init_rc_file.startswith('init.') or
diff --git a/tools/releasetools/img_from_target_files.py b/tools/releasetools/img_from_target_files.py
index c486992..ce5808f 100755
--- a/tools/releasetools/img_from_target_files.py
+++ b/tools/releasetools/img_from_target_files.py
@@ -95,21 +95,13 @@
       # images, so build them.
       import add_img_to_target_files
 
-      OPTIONS.info_dict = common.LoadInfoDict(input_zip)
-
-      # If this image was originally labelled with SELinux contexts,
-      # make sure we also apply the labels in our new image. During
-      # building, the "file_contexts" is in the out/ directory tree,
-      # but for repacking from target-files.zip it's in the root
-      # directory of the ramdisk.
-      if "selinux_fc" in OPTIONS.info_dict:
-        OPTIONS.info_dict["selinux_fc"] = os.path.join(
-            OPTIONS.input_tmp, "BOOT", "RAMDISK", "file_contexts")
+      OPTIONS.info_dict = common.LoadInfoDict(input_zip, OPTIONS.input_tmp)
 
       boot_image = common.GetBootableImage(
           "boot.img", "boot.img", OPTIONS.input_tmp, "BOOT")
       if boot_image:
         boot_image.AddToZip(output_zip)
+
       recovery_image = common.GetBootableImage(
           "recovery.img", "recovery.img", OPTIONS.input_tmp, "RECOVERY")
       if recovery_image:
diff --git a/tools/releasetools/ota_from_target_files.py b/tools/releasetools/ota_from_target_files.py
index a87363b..9ab8cb3 100755
--- a/tools/releasetools/ota_from_target_files.py
+++ b/tools/releasetools/ota_from_target_files.py
@@ -84,6 +84,9 @@
       Specifies the number of worker-threads that will be used when
       generating patches for incremental updates (defaults to 3).
 
+  --stash_threshold <float>
+      Specifies the threshold that will be used to compute the maximum
+      allowed stash size (defaults to 0.8).
 """
 
 import sys
@@ -123,6 +126,7 @@
 OPTIONS.fallback_to_full = True
 OPTIONS.full_radio = False
 
+
 def MostPopularKey(d, default):
   """Given a dict, return the key corresponding to the largest
   value.  Returns 'default' if the dict is empty."""
@@ -211,7 +215,8 @@
         if i.is_dir:
           i.children.sort(key=lambda i: i.name)
 
-    # set metadata for the files generated by this script.
+    # Set metadata for the files generated by this script. For full recovery
+    # image at system/etc/recovery.img, it will be taken care by fs_config.
     i = self.ITEMS.get("system/recovery-from-boot.p", None)
     if i:
       i.uid, i.gid, i.mode, i.selabel, i.capabilities = 0, 0, 0o644, None, None
@@ -415,11 +420,9 @@
 
 
 def HasRecoveryPatch(target_files_zip):
-  try:
-    target_files_zip.getinfo("SYSTEM/recovery-from-boot.p")
-    return True
-  except KeyError:
-    return False
+  namelist = [name for name in target_files_zip.namelist()]
+  return ("SYSTEM/recovery-from-boot.p" in namelist or
+          "SYSTEM/etc/recovery.img" in namelist)
 
 def HasVendorPartition(target_files_zip):
   try:
@@ -582,6 +585,8 @@
   if HasVendorPartition(input_zip):
     system_progress -= 0.1
 
+  # Place a copy of file_contexts.bin into the OTA package which will be used
+  # by the recovery program.
   if "selinux_fc" in OPTIONS.info_dict:
     WritePolicyConfig(OPTIONS.info_dict["selinux_fc"], output_zip)
 
@@ -609,8 +614,8 @@
     symlinks = CopyPartitionFiles(system_items, input_zip, output_zip)
     script.MakeSymlinks(symlinks)
 
-  boot_img = common.GetBootableImage("boot.img", "boot.img",
-                                     OPTIONS.input_tmp, "BOOT")
+  boot_img = common.GetBootableImage(
+      "boot.img", "boot.img", OPTIONS.input_tmp, "BOOT")
 
   if not block_based:
     def output_sink(fn, data):
@@ -830,9 +835,9 @@
   #    (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}
@@ -877,7 +882,8 @@
           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:
@@ -1217,9 +1223,9 @@
   #    (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}
@@ -1256,7 +1262,8 @@
 
     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,
@@ -1351,6 +1358,7 @@
       common.MakeRecoveryPatch(OPTIONS.target_tmp, output_sink,
                                target_recovery, target_boot)
       script.DeleteFiles(["/system/recovery-from-boot.p",
+                          "/system/etc/recovery.img",
                           "/system/etc/install-recovery.sh"])
     print "recovery image changed; including as patch from boot."
   else:
@@ -1502,6 +1510,12 @@
       OPTIONS.updater_binary = a
     elif o in ("--no_fallback_to_full",):
       OPTIONS.fallback_to_full = False
+    elif o == "--stash_threshold":
+      try:
+        OPTIONS.stash_threshold = float(a)
+      except ValueError:
+        raise ValueError("Cannot parse value %r for option %r - expecting "
+                         "a float" % (a, o))
     else:
       return False
     return True
@@ -1525,6 +1539,7 @@
                                  "oem_settings=",
                                  "verify",
                                  "no_fallback_to_full",
+                                 "stash_threshold=",
                              ], extra_option_handler=option_handler)
 
   if len(args) != 2:
@@ -1538,15 +1553,7 @@
   OPTIONS.input_tmp, input_zip = common.UnzipTemp(args[0])
 
   OPTIONS.target_tmp = OPTIONS.input_tmp
-  OPTIONS.info_dict = common.LoadInfoDict(input_zip)
-
-  # If this image was originally labelled with SELinux contexts, make sure we
-  # also apply the labels in our new image. During building, the "file_contexts"
-  # is in the out/ directory tree, but for repacking from target-files.zip it's
-  # in the root directory of the ramdisk.
-  if "selinux_fc" in OPTIONS.info_dict:
-    OPTIONS.info_dict["selinux_fc"] = os.path.join(
-        OPTIONS.input_tmp, "BOOT", "RAMDISK", "file_contexts")
+  OPTIONS.info_dict = common.LoadInfoDict(input_zip, OPTIONS.target_tmp)
 
   if OPTIONS.verbose:
     print "--- target info ---"
@@ -1582,6 +1589,11 @@
       output_zip = zipfile.ZipFile(temp_zip_file, "w",
                                    compression=zipfile.ZIP_DEFLATED)
 
+    cache_size = OPTIONS.info_dict.get("cache_size", None)
+    if cache_size is None:
+      print "--- can't determine the cache partition size ---"
+    OPTIONS.cache_size = cache_size
+
     if OPTIONS.incremental_source is None:
       WriteFullOTAPackage(input_zip, output_zip)
       if OPTIONS.package_key is None:
@@ -1596,10 +1608,8 @@
       OPTIONS.source_tmp, source_zip = common.UnzipTemp(
           OPTIONS.incremental_source)
       OPTIONS.target_info_dict = OPTIONS.info_dict
-      OPTIONS.source_info_dict = common.LoadInfoDict(source_zip)
-      if "selinux_fc" in OPTIONS.source_info_dict:
-        OPTIONS.source_info_dict["selinux_fc"] = os.path.join(
-            OPTIONS.source_tmp, "BOOT", "RAMDISK", "file_contexts")
+      OPTIONS.source_info_dict = common.LoadInfoDict(source_zip,
+                                                     OPTIONS.source_tmp)
       if OPTIONS.package_key is None:
         OPTIONS.package_key = OPTIONS.source_info_dict.get(
             "default_system_dev_certificate",
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 ec49112..e98eb8f 100755
--- a/tools/releasetools/sign_target_files_apks.py
+++ b/tools/releasetools/sign_target_files_apks.py
@@ -175,21 +175,26 @@
     data = input_tf_zip.read(info.filename)
     out_info = copy.copy(info)
 
+    # Replace keys if requested.
     if (info.filename == "META/misc_info.txt" and
         OPTIONS.replace_verity_private_key):
       ReplaceVerityPrivateKey(input_tf_zip, output_tf_zip, misc_info,
                               OPTIONS.replace_verity_private_key[1])
-    elif (info.filename == "BOOT/RAMDISK/verity_key" and
+    elif (info.filename in ("BOOT/RAMDISK/verity_key",
+                            "BOOT/verity_key") and
           OPTIONS.replace_verity_public_key):
-      new_data = ReplaceVerityPublicKey(output_tf_zip,
+      new_data = ReplaceVerityPublicKey(output_tf_zip, info.filename,
                                         OPTIONS.replace_verity_public_key[1])
       write_to_temp(info.filename, info.external_attr, new_data)
+    # Copy BOOT/, RECOVERY/, META/, ROOT/ to rebuild recovery patch.
     elif (info.filename.startswith("BOOT/") or
           info.filename.startswith("RECOVERY/") or
           info.filename.startswith("META/") or
+          info.filename.startswith("ROOT/") or
           info.filename == "SYSTEM/etc/recovery-resource.dat"):
       write_to_temp(info.filename, info.external_attr, data)
 
+    # Sign APKs.
     if info.filename.endswith(".apk"):
       name = os.path.basename(info.filename)
       key = apk_key_map[name]
@@ -214,6 +219,7 @@
       new_data = ReplaceCerts(data)
       common.ZipWriteStr(output_tf_zip, out_info, new_data)
     elif info.filename in ("SYSTEM/recovery-from-boot.p",
+                           "SYSTEM/etc/recovery.img",
                            "SYSTEM/bin/install-recovery.sh"):
       rebuild_recovery = True
     elif (OPTIONS.replace_ota_keys and
@@ -225,7 +231,8 @@
           info.filename == "META/misc_info.txt"):
       pass
     elif (OPTIONS.replace_verity_public_key and
-          info.filename == "BOOT/RAMDISK/verity_key"):
+          info.filename in ("BOOT/RAMDISK/verity_key",
+                            "BOOT/verity_key")):
       pass
     else:
       # a non-APK file; copy it verbatim
@@ -393,11 +400,11 @@
 
   return new_recovery_keys
 
-def ReplaceVerityPublicKey(targetfile_zip, key_path):
+def ReplaceVerityPublicKey(targetfile_zip, filename, key_path):
   print "Replacing verity public key with %s" % key_path
   with open(key_path) as f:
     data = f.read()
-  common.ZipWriteStr(targetfile_zip, "BOOT/RAMDISK/verity_key", data)
+  common.ZipWriteStr(targetfile_zip, filename, data)
   return data
 
 def ReplaceVerityPrivateKey(targetfile_input_zip, targetfile_output_zip,
diff --git a/tools/releasetools/sparse_img.py b/tools/releasetools/sparse_img.py
index 7019f00..07f3c1c 100644
--- a/tools/releasetools/sparse_img.py
+++ b/tools/releasetools/sparse_img.py
@@ -110,6 +110,17 @@
     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.clobbered_blocks)
     else: