7d292228c1
How it works: 1. build/make/core/Makefile generates a txt file with the kernel version, which is taken from an explicit BOARD_KERNEL_VERSION value, or extracted from the kernel image on the source tree, or extracted from the kernel image extracted from the prebuilt boot.img. The file is saved at $ANDROID_PRODUCT_OUT/obj/PACKAGING/check_vintf_all_intermediates/kernel_version.txt. 2. If PRODUCT_ENABLE_UFFD_GC is "default", meaning the GC type needs to be determined by the kernel version, build/make/core/Makefile copies kernel_version.txt to out/soong/dexpreopt/kernel_version_for_uffd_gc.txt. 3. build/soong/dexpreopt/config.go writes the the UFFD GC flag to out/soong/dexpreopt/uffd_gc_flag.txt. The flag is determined by an explicit PRODUCT_ENABLE_UFFD_GC value or by contruct_uffd_gc_flag.py, which reads kernel_version_for_uffd_gc.txt and determines the flag accordingly. 4. dex2oat takes the UFFD GC flag from uffd_gc_flag.txt. 5. post_process_props.py mangles ro.dalvik.vm.enable_uffd_gc based on the same logic. Bug: 321751629 Bug: 319554951 Bug: 318763448 Bug: 319648491 Test: m --no-skip-soong-tests nothing Test: atest uffd_gc_utils_test Test: Build with `OVERRIDE_ENABLE_UFFD_GC=default m` for device with no UFFD support - 1. Check the existence of `-Xgc:CMC` in out/soong/dexpreopt_arm64/dex_bootjars/android/system/framework/arm64/boot.invocation (dex2oat invocation for a boot image) 2. Check the existence of `-Xgc:CMC` in out/soong/.intermediates/packages/apps/Settings/Settings/android_common/dexpreopt/Settings/oat/arm64/package.invocation (dex2oat invocation for an app defined in .bp) 3. Check the existence of `-Xgc:CMC` in $ANDROID_PRODUCT_OUT/obj/APPS/Dialer_intermediates/oat/arm64/package.invocation (dex2oat invocation for an app defined in .mk) 4. Check the value of ro.dalvik.vm.enable_uffd_gc in $ANDROID_PRODUCT_OUT/product/etc/build.prop Test: Build with `OVERRIDE_ENABLE_UFFD_GC=default m` for device with UFFD support, and do the steps above. Test: Build with `OVERRIDE_ENABLE_UFFD_GC=true m`, and do the steps above. Test: Build with `OVERRIDE_ENABLE_UFFD_GC=false m`, and do the steps above. Change-Id: I035ad32233e49e2a30ce11f6c7c318a648511ef8
294 lines
5.4 KiB
Text
294 lines
5.4 KiB
Text
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