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Strip debug symbols from modules

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The size of the ramdisk has greatly increased, which can be a source of
boot time regressions. Strip the modules of debug symbols for the vendor
ramdisk and vendor partitions; vendor stripping can be skipped via BOARD
config.

Bug: 156395749
Signed-off-by: J. Avila <elavila@google.com>
Merged-In: I248d4e2097992f00975b344b5da41aa5d8016812
Change-Id: I248d4e2097992f00975b344b5da41aa5d8016812
This commit is contained in:
J. Avila 2020-05-12 23:40:02 +00:00
parent a74d425017
commit a2ceec665d
1 changed files with 23 additions and 7 deletions
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30
core/Makefile
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@ -204,6 +204,11 @@ $(INSTALLED_SDK_BUILD_PROP_TARGET): $(INSTALLED_BUILD_PROP_TARGET)
# Depmod requires a well-formed kernel version so 0.0 is used as a placeholder.
DEPMOD_STAGING_SUBDIR :=$= lib/modules/0.0
define copy-and-strip-kernel-module
$(2): $(1)
$($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_STRIP) -o $(2) --strip-debug $(1)
endef
# $(1): modules list
# $(2): output dir
# $(3): mount point
@ -211,9 +216,15 @@ DEPMOD_STAGING_SUBDIR :=$= lib/modules/0.0
# $(5): module load list
# $(6): module load list filename
# $(7): module archive
# $(8): staging dir for stripped modules
# Returns the a list of src:dest pairs to install the modules using copy-many-files.
define build-image-kernel-modules
$(foreach module,$(1),$(module):$(2)/lib/modules/$(notdir $(module))) \
$(foreach module,$(1), \
$(eval _src := $(module)) \
$(if $(8), \
$(eval _src := $(8)/$(notdir $(module))) \
$(eval $(call copy-and-strip-kernel-module,$(module),$(_src)))) \
$(_src):$(2)/lib/modules/$(notdir $(module))) \
$(eval $(call build-image-kernel-modules-depmod,$(1),$(3),$(4),$(5),$(6),$(7),$(2))) \
$(4)/$(DEPMOD_STAGING_SUBDIR)/modules.dep:$(2)/lib/modules/modules.dep \
$(4)/$(DEPMOD_STAGING_SUBDIR)/modules.alias:$(2)/lib/modules/modules.alias \
@ -313,41 +324,46 @@ ifneq ($(strip $(BOARD_RECOVERY_KERNEL_MODULES))$(strip $(BOARD_RECOVERY_KERNEL_
ALL_DEFAULT_INSTALLED_MODULES += $(call copy-many-files,$(call module-load-list-copy-paths,$(call intermediates-dir-for,PACKAGING,ramdisk_modules),$(BOARD_GENERIC_RAMDISK_KERNEL_MODULES),$(BOARD_GENERIC_RAMDISK_KERNEL_MODULES_LOAD),modules.load,$(TARGET_RECOVERY_ROOT_OUT)))
endif
endif
ALL_DEFAULT_INSTALLED_MODULES += $(call copy-many-files,$(call build-image-kernel-modules,$(BOARD_RECOVERY_KERNEL_MODULES),$(TARGET_RECOVERY_ROOT_OUT),,$(call intermediates-dir-for,PACKAGING,depmod_recovery),$(BOARD_RECOVERY_KERNEL_MODULES_LOAD),modules.load.recovery,$(BOARD_RECOVERY_KERNEL_MODULES_ARCHIVE)))
ALL_DEFAULT_INSTALLED_MODULES += $(call copy-many-files,$(call build-image-kernel-modules,$(BOARD_RECOVERY_KERNEL_MODULES),$(TARGET_RECOVERY_ROOT_OUT),,$(call intermediates-dir-for,PACKAGING,depmod_recovery),$(BOARD_RECOVERY_KERNEL_MODULES_LOAD),modules.load.recovery,$(BOARD_RECOVERY_KERNEL_MODULES_ARCHIVE),))
endif
ifneq ($(strip $(BOARD_VENDOR_RAMDISK_KERNEL_MODULES))$(strip $(BOARD_VENDOR_RAMDISK_KERNEL_MODULES_ARCHIVE)),)
ifeq ($(BOARD_VENDOR_RAMDISK_KERNEL_MODULES_LOAD),)
BOARD_VENDOR_RAMDISK_KERNEL_MODULES_LOAD := $(BOARD_VENDOR_RAMDISK_KERNEL_MODULES)
endif
ALL_DEFAULT_INSTALLED_MODULES += $(call copy-many-files,$(call build-image-kernel-modules,$(BOARD_VENDOR_RAMDISK_KERNEL_MODULES),$(TARGET_VENDOR_RAMDISK_OUT),,$(call intermediates-dir-for,PACKAGING,depmod_vendor_ramdisk),$(BOARD_VENDOR_RAMDISK_KERNEL_MODULES_LOAD),modules.load,$(BOARD_VENDOR_RAMDISK_KERNEL_MODULES_ARCHIVE)))
ALL_DEFAULT_INSTALLED_MODULES += $(call copy-many-files,$(call build-image-kernel-modules,$(BOARD_VENDOR_RAMDISK_KERNEL_MODULES),$(TARGET_VENDOR_RAMDISK_OUT),,$(call intermediates-dir-for,PACKAGING,depmod_vendor_ramdisk),$(BOARD_VENDOR_RAMDISK_KERNEL_MODULES_LOAD),modules.load,$(BOARD_VENDOR_RAMDISK_KERNEL_MODULES_ARCHIVE),$(call intermediates-dir-for,PACKAGING,depmod_vendor_ramdisk_stripped)))
ifneq (,$(BOARD_VENDOR_RAMDISK_RECOVERY_KERNEL_MODULES_LOAD))
# BOARD_VENDOR_RAMDISK_KERNEL_MODULES must be the full set, or super set,
# of copied modules represented by BOARD_VENDOR_RAMDISK_KERNEL_MODULES_LOAD
# and BOARD_VENDOR_RAMDISK_RECOVERY_KERNEL_MODULES_LOAD which are mined
# from modules.load which will contain relative paths, represent load order.
ALL_DEFAULT_INSTALLED_MODULES += $(call copy-many-files,$(call module-load-list-copy-paths,$(call intermediates-dir-for,PACKAGING,depmod_vendor_recovery_ramdisk),$(BOARD_VENDOR_RAMDISK_KERNEL_MODULES),$(BOARD_VENDOR_RAMDISK_RECOVERY_KERNEL_MODULES_LOAD),modules.load.recovery,$(TARGET_VENDOR_RAMDISK_OUT)))
ALL_DEFAULT_INSTALLED_MODULES += $(call copy-many-files,$(call module-load-list-copy-paths,$(call intermediates-dir-for,PACKAGING,depmod_vendor_recovery_ramdisk),$(BOARD_VENDOR_RAMDISK_KERNEL_MODULES),$(BOARD_VENDOR_RAMDISK_RECOVERY_KERNEL_MODULES_LOAD),modules.load.recovery,$(TARGET_VENDOR_RAMDISK_OUT),))
endif
endif
ifneq ($(BOARD_USES_RECOVERY_AS_BOOT), true)
ifneq ($(strip $(BOARD_GENERIC_RAMDISK_KERNEL_MODULES)),)
ALL_DEFAULT_INSTALLED_MODULES += $(call copy-many-files,$(call build-image-kernel-modules,$(BOARD_GENERIC_RAMDISK_KERNEL_MODULES),$(TARGET_RAMDISK_OUT),,$(call intermediates-dir-for,PACKAGING,depmod_ramdisk),$(BOARD_GENERIC_RAMDISK_KERNEL_MODULES_LOAD),modules.load,))
ALL_DEFAULT_INSTALLED_MODULES += $(call copy-many-files,$(call build-image-kernel-modules,$(BOARD_GENERIC_RAMDISK_KERNEL_MODULES),$(TARGET_RAMDISK_OUT),,$(call intermediates-dir-for,PACKAGING,depmod_ramdisk),$(BOARD_GENERIC_RAMDISK_KERNEL_MODULES_LOAD),modules.load,,))
endif
endif
ifneq ($(BOARD_DO_NOT_STRIP_VENDOR_MODULES),true)
VENDOR_STRIPPED_MODULE_STAGING_DIR := $(call intermediates-dir-for,PACKAGING,depmod_vendor_stripped)
else
VENDOR_STRIPPED_MODULE_STAGING_DIR :=
endif
ifneq ($(strip $(BOARD_VENDOR_KERNEL_MODULES)$(strip $(BOARD_VENDOR_KERNEL_MODULES_ARCHIVE))),)
ifeq ($(BOARD_VENDOR_KERNEL_MODULES_LOAD),)
BOARD_VENDOR_KERNEL_MODULES_LOAD := $(BOARD_VENDOR_KERNEL_MODULES)
endif
ALL_DEFAULT_INSTALLED_MODULES += $(call copy-many-files,$(call build-image-kernel-modules,$(BOARD_VENDOR_KERNEL_MODULES),$(TARGET_OUT_VENDOR),vendor,$(call intermediates-dir-for,PACKAGING,depmod_vendor),$(BOARD_VENDOR_KERNEL_MODULES_LOAD),modules.load,$(BOARD_VENDOR_KERNEL_MODULES_ARCHIVE)))
ALL_DEFAULT_INSTALLED_MODULES += $(call copy-many-files,$(call build-image-kernel-modules,$(BOARD_VENDOR_KERNEL_MODULES),$(TARGET_OUT_VENDOR),vendor,$(call intermediates-dir-for,PACKAGING,depmod_vendor),$(BOARD_VENDOR_KERNEL_MODULES_LOAD),modules.load,$(BOARD_VENDOR_KERNEL_MODULES_ARCHIVE),$(VENDOR_STRIPPED_MODULE_STAGING_DIR)))
endif
ifneq ($(strip $(BOARD_ODM_KERNEL_MODULES))$(strip $(BOARD_ODM_KERNEL_MODULES_ARCHIVE)),)
ifeq ($(BOARD_RECOVERY_KERNEL_MODULES_LOAD),)
BOARD_ODM_KERNEL_MODULES_LOAD := $(BOARD_ODM_KERNEL_MODULES)
endif
ALL_DEFAULT_INSTALLED_MODULES += $(call copy-many-files,$(call build-image-kernel-modules,$(BOARD_ODM_KERNEL_MODULES),$(TARGET_OUT_ODM),odm,$(call intermediates-dir-for,PACKAGING,depmod_odm),$(BOARD_ODM_KERNEL_MODULES_LOAD),modules.load,$(BOARD_ODM_KERNEL_MODULES_ARCHIVE)))
ALL_DEFAULT_INSTALLED_MODULES += $(call copy-many-files,$(call build-image-kernel-modules,$(BOARD_ODM_KERNEL_MODULES),$(TARGET_OUT_ODM),odm,$(call intermediates-dir-for,PACKAGING,depmod_odm),$(BOARD_ODM_KERNEL_MODULES_LOAD),modules.load,$(BOARD_ODM_KERNEL_MODULES_ARCHIVE),))
endif
# -----------------------------------------------------------------