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Commit 90a4db9c authored by Treehugger Robot's avatar Treehugger Robot Committed by Automerger Merge Worker
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Merge "Determine whether to enable userfaultfd GC at build time." am: 09207360 

Original change: https://android-review.googlesource.com/c/platform/build/+/2304232



Change-Id: I309d6877894a3b37284d5f49b69c7b258614563e
Signed-off-by: default avatarAutomerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
parents 94f22d5c 09207360

core/OWNERS

+2 −1
Original line number Diff line number Diff line 
per-file *dex_preopt*.* = ngeoffray@google.com,skvadrik@google.com

per-file *dex_preopt*.* = jiakaiz@google.com,ngeoffray@google.com,skvadrik@google.com

per-file art_*.* = jiakaiz@google.com,ngeoffray@google.com,skvadrik@google.com

per-file verify_uses_libraries.sh = ngeoffray@google.com,skvadrik@google.com



# For global Proguard rules

core/art_config.mk

0 → 100644
+46 −0
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# ART configuration that has to be determined after product config is resolved.

#

# Inputs:

# PRODUCT_ENABLE_UFFD_GC: See comments in build/make/core/product.mk.

# OVERRIDE_ENABLE_UFFD_GC: Overrides PRODUCT_ENABLE_UFFD_GC. Can be passed from the commandline for

# debugging purposes.

# BOARD_API_LEVEL: See comments in build/make/core/main.mk.

# BOARD_SHIPPING_API_LEVEL: See comments in build/make/core/main.mk.

# PRODUCT_SHIPPING_API_LEVEL: See comments in build/make/core/product.mk.

#

# Outputs:

# ENABLE_UFFD_GC: Whether to use userfaultfd GC.



config_enable_uffd_gc := \

  $(firstword $(OVERRIDE_ENABLE_UFFD_GC) $(PRODUCT_ENABLE_UFFD_GC))



ifeq (,$(filter-out default,$(config_enable_uffd_gc)))

  ENABLE_UFFD_GC := true



  # Disable userfaultfd GC if the device doesn't support it (i.e., if

  # `min(ro.board.api_level ?? ro.board.first_api_level ?? MAX_VALUE,

  #      ro.product.first_api_level ?? ro.build.version.sdk ?? MAX_VALUE) < 31`)

  # This logic aligns with how `ro.vendor.api_level` is calculated in

  # `system/core/init/property_service.cpp`.

  # We omit the check on `ro.build.version.sdk` here because we are on the latest build system.

  board_api_level := $(firstword $(BOARD_API_LEVEL) $(BOARD_SHIPPING_API_LEVEL))

  ifneq (,$(board_api_level))

    ifeq (true,$(call math_lt,$(board_api_level),31))

      ENABLE_UFFD_GC := false

    endif

  endif



  ifneq (,$(PRODUCT_SHIPPING_API_LEVEL))

    ifeq (true,$(call math_lt,$(PRODUCT_SHIPPING_API_LEVEL),31))

      ENABLE_UFFD_GC := false

    endif

  endif

else ifeq (true,$(config_enable_uffd_gc))

  ENABLE_UFFD_GC := true

else ifeq (false,$(config_enable_uffd_gc))

  ENABLE_UFFD_GC := false

else

  $(error Unknown PRODUCT_ENABLE_UFFD_GC value: $(config_enable_uffd_gc))

endif



ADDITIONAL_PRODUCT_PROPERTIES += ro.dalvik.vm.enable_uffd_gc=$(ENABLE_UFFD_GC)

core/dex_preopt_config.mk

+1 −0
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@@ -130,6 +130,7 @@ ifeq ($(WRITE_SOONG_VARIABLES),true) 
  $(call add_json_str,  Dex2oatXmx,                              $(DEX2OAT_XMX))

  $(call add_json_str,  Dex2oatXms,                              $(DEX2OAT_XMS))

  $(call add_json_str,  EmptyDirectory,                          $(OUT_DIR)/empty)

  $(call add_json_bool, EnableUffdGc,                            $(ENABLE_UFFD_GC))



ifdef TARGET_ARCH

  $(call add_json_map,  CpuVariant)

core/main.mk

+2 −0
Original line number Diff line number Diff line
@@ -493,6 +493,8 @@ endif 
# Typical build; include any Android.mk files we can find.

#



include $(BUILD_SYSTEM)/art_config.mk



# Bring in dex_preopt.mk

# This creates some modules so it needs to be included after

# should-install-to-system is defined (in order for base_rules.mk to function

core/product.mk

+12 −0
Original line number Diff line number Diff line
@@ -370,6 +370,18 @@ _product_single_value_vars += PRODUCT_MODULE_BUILD_FROM_SOURCE 
# If true, installs a full version of com.android.virt APEX.

_product_single_value_vars += PRODUCT_AVF_ENABLED



# Whether to use userfaultfd GC.

# Possible values are:

# - "default" or empty: both the build system and the runtime determine whether to use userfaultfd

#   GC based on the vendor API level

# - "true": forces the build system to use userfaultfd GC regardless of the vendor API level; the

#   runtime determines whether to use userfaultfd GC based on the kernel support. Note that the

#   device may have to re-compile everything on the first boot if the kernel doesn't support

#   userfaultfd

# - "false": disallows the build system and the runtime to use userfaultfd GC even if the device

#   supports it

_product_single_value_vars += PRODUCT_ENABLE_UFFD_GC



.KATI_READONLY := _product_single_value_vars _product_list_vars

_product_var_list :=$= $(_product_single_value_vars) $(_product_list_vars)