diff --git a/core/combo/javac.mk b/core/combo/javac.mk
index 64025e3..7d19279 100644
--- a/core/combo/javac.mk
+++ b/core/combo/javac.mk
@@ -11,12 +11,17 @@
 
 ifndef ANDROID_COMPILE_WITH_JACK
 # Defines if compilation with jack is enabled by default.
-ANDROID_COMPILE_WITH_JACK := false
+ANDROID_COMPILE_WITH_JACK := true
 endif
 
 common_jdk_flags := -Xmaxerrs 9999999
 
+ifeq ($(OVERRIDE_ANDROID_JAVA_HOME),)
 ANDROID_JAVA_HOME := prebuilts/jdk/jdk8/$(HOST_PREBUILT_TAG)
+else
+# Use this build toolchain instead of the bundled one.
+ANDROID_JAVA_HOME := $(OVERRIDE_ANDROID_JAVA_HOME)
+endif
 ANDROID_JAVA_TOOLCHAIN := $(ANDROID_JAVA_HOME)/bin
 export JAVA_HOME := $(abspath $(ANDROID_JAVA_HOME))
 
diff --git a/core/dex_preopt_libart.mk b/core/dex_preopt_libart.mk
index 9db5dbf..47fdba6 100644
--- a/core/dex_preopt_libart.mk
+++ b/core/dex_preopt_libart.mk
@@ -88,6 +88,42 @@
 LIBART_TARGET_BOOT_ART_EXTRA_FILES := $(foreach jar,$(wordlist 2,999,$(LIBART_TARGET_BOOT_JARS)),boot-$(jar).art boot-$(jar).oat boot-$(jar).vdex)
 LIBART_TARGET_BOOT_ART_EXTRA_FILES += boot.oat boot.vdex
 
+# If we use a boot image profile.
+my_use_profile_for_boot_image := $(PRODUCT_USE_PROFILE_FOR_BOOT_IMAGE)
+ifeq (,$(my_use_profile_for_boot_image))
+# If not set, use the default.
+my_use_profile_for_boot_image := false
+endif
+
+ifeq (true,$(my_use_profile_for_boot_image))
+
+# Location of text based profile for the boot image.
+my_boot_image_profile_location := $(PRODUCT_DEX_PREOPT_BOOT_IMAGE_PROFILE_LOCATION)
+ifeq (,$(my_boot_image_profile_location))
+# If not set, use the default.
+my_boot_image_profile_location := frameworks/base/boot-image-profile.txt
+endif
+
+# Code to create the boot image profile, not in dex_preopt_libart_boot.mk since the profile is the same for all archs.
+my_out_boot_image_profile_location := $(DEXPREOPT_BOOT_JAR_DIR_FULL_PATH)/boot.prof
+$(my_out_boot_image_profile_location): PRIVATE_PROFILE_INPUT_LOCATION := $(my_boot_image_profile_location)
+$(my_out_boot_image_profile_location): $(PROFMAN) $(LIBART_TARGET_BOOT_DEX_FILES) $(my_boot_image_profile_location)
+	@echo "target profman: $@"
+	@mkdir -p $(dir $@)
+	ANDROID_LOG_TAGS="*:e" $(PROFMAN) \
+		--create-profile-from=$(PRIVATE_PROFILE_INPUT_LOCATION) \
+		$(addprefix --apk=,$(LIBART_TARGET_BOOT_DEX_FILES)) \
+		$(addprefix --dex-location=,$(LIBART_TARGET_BOOT_DEX_LOCATIONS)) \
+		--reference-profile-file=$@
+
+# We want to install the profile even if we are not using preopt since it is required to generate
+# the image on the device.
+my_installed_profile := $(TARGET_OUT)/etc/boot-image.prof
+$(eval $(call copy-one-file,$(my_out_boot_image_profile_location),$(my_installed_profile)))
+ALL_DEFAULT_INSTALLED_MODULES += $(my_installed_profile)
+
+endif
+
 my_2nd_arch_prefix :=
 include $(BUILD_SYSTEM)/dex_preopt_libart_boot.mk
 
diff --git a/core/dex_preopt_libart_boot.mk b/core/dex_preopt_libart_boot.mk
index 860a66a..6e49f64 100644
--- a/core/dex_preopt_libart_boot.mk
+++ b/core/dex_preopt_libart_boot.mk
@@ -50,18 +50,27 @@
 	@mkdir -p $(dir $@)
 	$(hide) $(ACP) -fp $(dir $<)$(notdir $@) $@
 
+ifeq (,$(my_out_boot_image_profile_location))
+my_boot_image_flags := $(COMPILED_CLASSES_FLAGS)
+my_boot_image_flags += --image-classes=$(PRELOADED_CLASSES)
+else
+my_boot_image_flags := --compiler-filter=speed-profile
+my_boot_image_flags += --profile-file=$(my_out_boot_image_profile_location)
+endif
+
+$($(my_2nd_arch_prefix)DEFAULT_DEX_PREOPT_BUILT_IMAGE_FILENAME): PRIVATE_BOOT_IMAGE_FLAGS := $(my_boot_image_flags)
 $($(my_2nd_arch_prefix)DEFAULT_DEX_PREOPT_BUILT_IMAGE_FILENAME): PRIVATE_2ND_ARCH_VAR_PREFIX := $(my_2nd_arch_prefix)
 # Use dex2oat debug version for better error reporting
-$($(my_2nd_arch_prefix)DEFAULT_DEX_PREOPT_BUILT_IMAGE_FILENAME) : $(LIBART_TARGET_BOOT_DEX_FILES) $(PRELOADED_CLASSES) $(COMPILED_CLASSES) $(DEX2OAT_DEPENDENCY)
+$($(my_2nd_arch_prefix)DEFAULT_DEX_PREOPT_BUILT_IMAGE_FILENAME) : $(LIBART_TARGET_BOOT_DEX_FILES) $(PRELOADED_CLASSES) $(COMPILED_CLASSES) $(DEX2OAT_DEPENDENCY) $(my_out_profile_location)
 	@echo "target dex2oat: $@"
 	@mkdir -p $(dir $@)
 	@mkdir -p $(dir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED))
 	@rm -f $(dir $@)/*.art $(dir $@)/*.oat
 	@rm -f $(dir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED))/*.art
 	@rm -f $(dir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED))/*.oat
-	$(hide) ANDROID_LOG_TAGS="*:e" $(DEX2OAT) --runtime-arg -Xms$(DEX2OAT_IMAGE_XMS) \
+	$(DEX2OAT) --runtime-arg -Xms$(DEX2OAT_IMAGE_XMS) \
 		--runtime-arg -Xmx$(DEX2OAT_IMAGE_XMX) \
-		--image-classes=$(PRELOADED_CLASSES) \
+		$(PRIVATE_BOOT_IMAGE_FLAGS) \
 		$(addprefix --dex-file=,$(LIBART_TARGET_BOOT_DEX_FILES)) \
 		$(addprefix --dex-location=,$(LIBART_TARGET_BOOT_DEX_LOCATIONS)) \
 		--oat-symbols=$($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED) \
@@ -75,4 +84,4 @@
 		--runtime-arg -Xnorelocate --compile-pic \
 		--no-generate-debug-info --generate-build-id \
 		--multi-image --no-inline-from=core-oj.jar \
-		$(PRODUCT_DEX_PREOPT_BOOT_FLAGS) $(GLOBAL_DEXPREOPT_FLAGS) $(COMPILED_CLASSES_FLAGS) $(ART_BOOT_IMAGE_EXTRA_ARGS)
+		$(PRODUCT_DEX_PREOPT_BOOT_FLAGS) $(GLOBAL_DEXPREOPT_FLAGS) $(ART_BOOT_IMAGE_EXTRA_ARGS)
diff --git a/core/dex_preopt_odex_install.mk b/core/dex_preopt_odex_install.mk
index b9c0fc6..136def4 100644
--- a/core/dex_preopt_odex_install.mk
+++ b/core/dex_preopt_odex_install.mk
@@ -59,6 +59,31 @@
 built_installed_art :=
 
 ifdef LOCAL_DEX_PREOPT
+
+ifeq (false,$(WITH_DEX_PREOPT_GENERATE_PROFILE))
+LOCAL_DEX_PREOPT_GENERATE_PROFILE := false
+endif
+
+ifdef LOCAL_VENDOR_MODULE
+ifeq (true,$(LOCAL_DEX_PREOPT_GENERATE_PROFILE))
+$(error profiles are not supported for vendor modules)
+endif
+else
+ifndef LOCAL_DEX_PREOPT_GENERATE_PROFILE
+# If LOCAL_DEX_PREOPT_GENERATE_PROFILE is not defined, default it based on the existence of the
+# profile class listing. TODO: Use product specific directory here.
+my_classes_directory := $(PRODUCT_DEX_PREOPT_PROFILE_DIR)
+LOCAL_DEX_PREOPT_PROFILE_CLASS_LISTING := $(my_classes_directory)/$(LOCAL_MODULE).prof.txt
+ifneq (,$(wildcard $(LOCAL_DEX_PREOPT_PROFILE_CLASS_LISTING)))
+# Profile listing exists, use it to generate the profile.
+ifeq ($(LOCAL_DEX_PREOPT_APP_IMAGE),)
+LOCAL_DEX_PREOPT_APP_IMAGE := true
+endif
+LOCAL_DEX_PREOPT_GENERATE_PROFILE := true
+endif
+endif
+endif
+
 dexpreopt_boot_jar_module := $(filter $(DEXPREOPT_BOOT_JARS_MODULES),$(LOCAL_MODULE))
 ifdef dexpreopt_boot_jar_module
 # For libart, the boot jars' odex files are replaced by $(DEFAULT_DEX_PREOPT_INSTALLED_IMAGE).
@@ -113,13 +138,6 @@
 installed_art := $(strip $(installed_art))
 
 ifdef built_odex
-
-ifndef LOCAL_DEX_PREOPT_GENERATE_PROFILE
-ifeq (true,$(WITH_DEX_PREOPT_GENERATE_PROFILE))
-  LOCAL_DEX_PREOPT_GENERATE_PROFILE := true
-endif
-endif
-
 ifeq (true,$(LOCAL_DEX_PREOPT_GENERATE_PROFILE))
 ifndef LOCAL_DEX_PREOPT_PROFILE_CLASS_LISTING
 $(call pretty-error,Must have specified class listing (LOCAL_DEX_PREOPT_PROFILE_CLASS_LISTING))
@@ -141,7 +159,12 @@
 		--apk=$(PRIVATE_BUILT_MODULE) \
 		--dex-location=$(PRIVATE_DEX_LOCATION) \
 		--reference-profile-file=$@
+my_installed_profile := $(LOCAL_INSTALLED_MODULE).prof
+$(eval $(call copy-one-file,$(my_built_profile),$(my_installed_profile)))
+build_installed_profile:=$(my_built_profile):$(my_installed_profile)
 else
+build_installed_profile:=
+my_installed_profile :=
 $(built_odex): PRIVATE_PROFILE_PREOPT_FLAGS :=
 endif
 
@@ -152,14 +175,44 @@
 endif
 endif
 
-ifneq (,$(filter $(PRODUCT_SYSTEM_SERVER_JARS) $(PRODUCT_DEXPREOPT_SPEED_APPS) $(PRODUCT_SYSTEM_SERVER_APPS),$(LOCAL_MODULE)))
-  # Jars of system server, apps loaded into system server, and apps the product wants to be
-  # compiled with the 'speed' compiler filter.
-  LOCAL_DEX_PREOPT_FLAGS += --compiler-filter=speed
-else
-  # If no compiler filter is specified, default to 'quicken' to save on storage.
-  ifeq (,$(filter --compiler-filter=%, $(LOCAL_DEX_PREOPT_FLAGS)))
-    LOCAL_DEX_PREOPT_FLAGS += --compiler-filter=quicken
+my_system_server_compiler_filter := $(PRODUCT_SYSTEM_SERVER_COMPILER_FILTER)
+ifeq (,$(my_system_server_compiler_filter))
+my_system_server_compiler_filter := speed
+endif
+
+ifeq (,$(filter --compiler-filter=%, $(LOCAL_DEX_PREOPT_FLAGS)))
+  ifneq (,$(filter $(PRODUCT_SYSTEM_SERVER_JARS),$(LOCAL_MODULE)))
+    # Jars of system server, use the product option if it is set, speed otherwise.
+    LOCAL_DEX_PREOPT_FLAGS += --compiler-filter=$(my_system_server_compiler_filter)
+  else
+    ifneq (,$(filter $(PRODUCT_DEXPREOPT_SPEED_APPS) $(PRODUCT_SYSTEM_SERVER_APPS),$(LOCAL_MODULE)))
+      # Apps loaded into system server, and apps the product default to being compiled with the
+      # 'speed' compiler filter.
+      LOCAL_DEX_PREOPT_FLAGS += --compiler-filter=speed
+    else
+      ifeq (true,$(LOCAL_DEX_PREOPT_GENERATE_PROFILE))
+        # For non system server jars, use speed-profile when we have a profile.
+        LOCAL_DEX_PREOPT_FLAGS += --compiler-filter=speed-profile
+      else
+        # If no compiler filter is specified, default to 'quicken' to save on storage.
+        LOCAL_DEX_PREOPT_FLAGS += --compiler-filter=quicken
+      endif
+    endif
+  endif
+endif
+
+# PRODUCT_SYSTEM_SERVER_DEBUG_INFO overrides WITH_DEXPREOPT_DEBUG_INFO.
+my_system_server_debug_info := $(PRODUCT_SYSTEM_SERVER_DEBUG_INFO)
+ifeq (,$(filter eng, $(TARGET_BUILD_VARIANT)))
+# Only enable for non-eng builds.
+ifeq (,$(my_system_server_debug_info))
+my_system_server_debug_info := true
+endif
+endif
+
+ifeq (true, $(my_system_server_debug_info))
+  ifneq (,$(filter $(PRODUCT_SYSTEM_SERVER_JARS),$(LOCAL_MODULE)))
+    LOCAL_DEX_PREOPT_FLAGS += --generate-mini-debug-info
   endif
 endif
 
@@ -172,9 +225,11 @@
 ALL_MODULES.$(my_register_name).INSTALLED += $(installed_odex)
 ALL_MODULES.$(my_register_name).INSTALLED += $(installed_vdex)
 ALL_MODULES.$(my_register_name).INSTALLED += $(installed_art)
+ALL_MODULES.$(my_register_name).INSTALLED += $(my_installed_profile)
 ALL_MODULES.$(my_register_name).BUILT_INSTALLED += $(built_installed_odex)
 ALL_MODULES.$(my_register_name).BUILT_INSTALLED += $(built_installed_vdex)
 ALL_MODULES.$(my_register_name).BUILT_INSTALLED += $(built_installed_art)
+ALL_MODULES.$(my_register_name).BUILT_INSTALLED += $(build_installed_profile)
 
 # Record dex-preopt config.
 DEXPREOPT.$(LOCAL_MODULE).DEX_PREOPT := $(LOCAL_DEX_PREOPT)
@@ -190,6 +245,6 @@
 
 
 # Make sure to install the .odex and .vdex when you run "make <module_name>"
-$(my_all_targets): $(installed_odex) $(installed_vdex) $(installed_art)
+$(my_all_targets): $(installed_odex) $(installed_vdex) $(installed_art) $(my_installed_profile)
 
 endif # LOCAL_DEX_PREOPT
diff --git a/core/java_common.mk b/core/java_common.mk
index 3c9b18f..ba00b368 100644
--- a/core/java_common.mk
+++ b/core/java_common.mk
@@ -19,7 +19,11 @@
   ifneq (,$(filter $(LOCAL_SDK_VERSION), $(private_sdk_versions_without_any_java_18_support)))
     LOCAL_JAVA_LANGUAGE_VERSION := 1.7
   else
-    LOCAL_JAVA_LANGUAGE_VERSION := 1.8
+    ifneq ($(EXPERIMENTAL_USE_OPENJDK9),true)
+      LOCAL_JAVA_LANGUAGE_VERSION := 1.8
+    else
+      LOCAL_JAVA_LANGUAGE_VERSION := 1.9
+    endif
   endif
 endif
 LOCAL_JAVACFLAGS += -source $(LOCAL_JAVA_LANGUAGE_VERSION) -target $(LOCAL_JAVA_LANGUAGE_VERSION)
diff --git a/core/main.mk b/core/main.mk
index d14d64b..3161cc7 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -214,6 +214,11 @@
   endif
 endif
 
+# Add the system server compiler filter if they are specified for the product.
+ifneq (,$(PRODUCT_SYSTEM_SERVER_COMPILER_FILTER))
+ADDITIONAL_BUILD_PROPERTIES += dalvik.vm.systemservercompilerfilter=$(PRODUCT_SYSTEM_SERVER_COMPILER_FILTER)
+endif
+
 ## user/userdebug ##
 
 user_variant := $(filter user userdebug,$(TARGET_BUILD_VARIANT))
diff --git a/core/product.mk b/core/product.mk
index c5ddf81..6722526 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -120,9 +120,14 @@
     PRODUCT_VERITY_SIGNING_KEY \
     PRODUCT_SYSTEM_VERITY_PARTITION \
     PRODUCT_VENDOR_VERITY_PARTITION \
+    PRODUCT_SYSTEM_SERVER_DEBUG_INFO \
     PRODUCT_DEX_PREOPT_MODULE_CONFIGS \
     PRODUCT_DEX_PREOPT_DEFAULT_FLAGS \
     PRODUCT_DEX_PREOPT_BOOT_FLAGS \
+    PRODUCT_DEX_PREOPT_PROFILE_DIR \
+    PRODUCT_DEX_PREOPT_BOOT_IMAGE_PROFILE_LOCATION \
+    PRODUCT_USE_PROFILE_FOR_BOOT_IMAGE \
+    PRODUCT_SYSTEM_SERVER_COMPILER_FILTER \
     PRODUCT_SANITIZER_MODULE_CONFIGS \
     PRODUCT_SYSTEM_BASE_FS_PATH \
     PRODUCT_VENDOR_BASE_FS_PATH \
diff --git a/core/product_config.mk b/core/product_config.mk
index 36f473f..6812b05 100644
--- a/core/product_config.mk
+++ b/core/product_config.mk
@@ -380,6 +380,20 @@
     $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_DEX_PREOPT_DEFAULT_FLAGS))
 PRODUCT_DEX_PREOPT_BOOT_FLAGS := \
     $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_DEX_PREOPT_BOOT_FLAGS))
+PRODUCT_DEX_PREOPT_PROFILE_DIR := \
+    $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_DEX_PREOPT_PROFILE_DIR))
+
+# Boot image options.
+PRODUCT_USE_PROFILE_FOR_BOOT_IMAGE := \
+    $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_USE_PROFILE_FOR_BOOT_IMAGE))
+PRODUCT_DEX_PREOPT_BOOT_IMAGE_PROFILE_LOCATION := \
+    $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_DEX_PREOPT_BOOT_IMAGE_PROFILE_LOCATION))
+
+PRODUCT_SYSTEM_SERVER_COMPILER_FILTER := \
+    $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SYSTEM_SERVER_COMPILER_FILTER))
+PRODUCT_SYSTEM_SERVER_DEBUG_INFO := \
+    $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SYSTEM_SERVER_DEBUG_INFO))
+
 # Resolve and setup per-module dex-preopt configs.
 PRODUCT_DEX_PREOPT_MODULE_CONFIGS := \
     $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_DEX_PREOPT_MODULE_CONFIGS))