d6c6e3a9f3
This is determined by: - a product config flag - the vendor API level It is then passed to the device as a system property "ro.dalvik.vm.enable_uffd_gc". This change is a no-op change. It doesn't enable userfaultfd GC by default. OVERRIDE_ENABLE_UFFD_GC=default can be passed to the build system to enable userfaultfd GC for testing purposes. Bug: 242553398 Test: - 1. lunch aosp_redfin-userdebug 2. OVERRIDE_ENABLE_UFFD_GC=default build/soong/soong_ui.bash --dumpvars-mode --vars=ENABLE_UFFD_GC 3. See "false" in the output Test: - 1. lunch aosp_oriole-userdebug 2. OVERRIDE_ENABLE_UFFD_GC=default build/soong/soong_ui.bash --dumpvars-mode --vars=ENABLE_UFFD_GC 3. See "true" in the output Test: - 1. lunch aosp_redfin-userdebug 2. OVERRIDE_ENABLE_UFFD_GC=true build/soong/soong_ui.bash --dumpvars-mode --vars=ENABLE_UFFD_GC 3. See "true" in the output Test: - 1. lunch aosp_oriole-userdebug 2. OVERRIDE_ENABLE_UFFD_GC=false build/soong/soong_ui.bash --dumpvars-mode --vars=ENABLE_UFFD_GC 3. See "false" in the output Change-Id: Ifd6e6cddb502315912ff949619a5b526ae0d73ff
46 lines
1.8 KiB
Makefile
46 lines
1.8 KiB
Makefile
# ART configuration that has to be determined after product config is resolved.
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#
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# Inputs:
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# PRODUCT_ENABLE_UFFD_GC: See comments in build/make/core/product.mk.
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# OVERRIDE_ENABLE_UFFD_GC: Overrides PRODUCT_ENABLE_UFFD_GC. Can be passed from the commandline for
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# debugging purposes.
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# BOARD_API_LEVEL: See comments in build/make/core/main.mk.
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# BOARD_SHIPPING_API_LEVEL: See comments in build/make/core/main.mk.
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# PRODUCT_SHIPPING_API_LEVEL: See comments in build/make/core/product.mk.
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#
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# Outputs:
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# ENABLE_UFFD_GC: Whether to use userfaultfd GC.
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config_enable_uffd_gc := \
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$(firstword $(OVERRIDE_ENABLE_UFFD_GC) $(PRODUCT_ENABLE_UFFD_GC))
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ifeq (,$(filter-out default,$(config_enable_uffd_gc)))
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ENABLE_UFFD_GC := true
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# Disable userfaultfd GC if the device doesn't support it (i.e., if
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# `min(ro.board.api_level ?? ro.board.first_api_level ?? MAX_VALUE,
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# ro.product.first_api_level ?? ro.build.version.sdk ?? MAX_VALUE) < 31`)
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# This logic aligns with how `ro.vendor.api_level` is calculated in
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# `system/core/init/property_service.cpp`.
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# We omit the check on `ro.build.version.sdk` here because we are on the latest build system.
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board_api_level := $(firstword $(BOARD_API_LEVEL) $(BOARD_SHIPPING_API_LEVEL))
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ifneq (,$(board_api_level))
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ifeq (true,$(call math_lt,$(board_api_level),31))
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ENABLE_UFFD_GC := false
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endif
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endif
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ifneq (,$(PRODUCT_SHIPPING_API_LEVEL))
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ifeq (true,$(call math_lt,$(PRODUCT_SHIPPING_API_LEVEL),31))
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ENABLE_UFFD_GC := false
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endif
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endif
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else ifeq (true,$(config_enable_uffd_gc))
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ENABLE_UFFD_GC := true
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else ifeq (false,$(config_enable_uffd_gc))
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ENABLE_UFFD_GC := false
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else
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$(error Unknown PRODUCT_ENABLE_UFFD_GC value: $(config_enable_uffd_gc))
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endif
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ADDITIONAL_PRODUCT_PROPERTIES += ro.dalvik.vm.enable_uffd_gc=$(ENABLE_UFFD_GC)
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