dex2oat调用场景

boot相关image

• 若打开WITH_DEXPREOPT，则在编译system.img时，就会在host机器上执行dex预优化(默认配置)

  dex2oat-cmdline = --runtime-arg -Xms64m --runtime-arg -Xmx64m --image-classes=frameworks/base/preloaded-classes --dex-file=out/target/common/obj/JAVA_LIBRARIES/core-oj_intermediates/javalib.jar --dex-file=out/target/common/obj/JAVA_LIBRARIES/core-libart_intermediates/javalib.jar --dex-file=out/target/common/obj/JAVA_LIBRARIES/conscrypt_intermediates/javalib.jar --dex-file=out/target/common/obj/JAVA_LIBRARIES/okhttp_intermediates/javalib.jar --dex-file=out/target/common/obj/JAVA_LIBRARIES/legacy-test_intermediates/javalib.jar --dex-file=out/target/common/obj/JAVA_LIBRARIES/bouncycastle_intermediates/javalib.jar --dex-file=out/target/common/obj/JAVA_LIBRARIES/ext_intermediates/javalib.jar --dex-file=out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/javalib.jar --dex-file=out/target/common/obj/JAVA_LIBRARIES/telephony-common_intermediates/javalib.jar --dex-file=out/target/common/obj/JAVA_LIBRARIES/voip-common_intermediates/javalib.jar --dex-file=out/target/common/obj/JAVA_LIBRARIES/ims-common_intermediates/javalib.jar --dex-file=out/target/common/obj/JAVA_LIBRARIES/apache-xml_intermediates/javalib.jar --dex-file=out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy.boot_intermediates/javalib.jar --dex-file=out/target/common/obj/JAVA_LIBRARIES/android.hidl.base-V1.0-java_intermediates/javalib.jar --dex-file=out/target/common/obj/JAVA_LIBRARIES/android.hidl.manager-V1.0-java_intermediates/javalib.jar --dex-location=/system/framework/core-oj.jar --dex-location=/system/framework/core-libart.jar --dex-location=/system/framework/conscrypt.jar --dex-location=/system/framework/okhttp.jar --dex-location=/system/framework/legacy-test.jar --dex-location=/system/framework/bouncycastle.jar --dex-location=/system/framework/ext.jar --dex-location=/system/framework/framework.jar --dex-location=/system/framework/telephony-common.jar --dex-location=/system/framework/voip-common.jar --dex-location=/system/framework/ims-common.jar --dex-location=/system/framework/apache-xml.jar --dex-location=/system/framework/org.apache.http.legacy.boot.jar --dex-location=/system/framework/android.hidl.base-V1.0-java.jar --dex-location=/system/framework/android.hidl.manager-V1.0-java.jar --oat-symbols=out/target/product/angler/symbols/system/framework/arm64/boot.oat --oat-file=out/target/product/angler/dex_bootjars/system/framework/arm64/boot.oat --oat-location=/system/framework/arm64/boot.oat --image=out/target/product/angler/dex_bootjars/system/framework/arm64/boot.art --base=0x70000000 --instruction-set=arm64 --instruction-set-variant=cortex-a53 --instruction-set-features=default --android-root=out/target/product/angler/system --runtime-arg -Xnorelocate --compile-pic --no-generate-debug-info --generate-build-id --multi-image --no-inline-from=core-oj.jar --generate-mini-debug-info --generate-mini-debug-info --compiled-classes=frameworks/base/compiled-classes-phone
  

• 若未打开WITH_DEXPREOPT, 则在首次开机时由zygote负责生成boot相关image.

  dex2oat-cmdline = --image=/data/dalvik-cache/arm64/system@framework@boot.art --dex-file=/system/framework/core-oj.jar --dex-file=/system/framework/core-libart.jar --dex-file=/system/framework/conscrypt.jar --dex-file=/system/framework/okhttp.jar --dex-file=/system/framework/bouncycastle.jar --dex-file=/system/framework/apache-xml.jar --dex-file=/system/framework/legacy-test.jar --dex-file=/system/framework/ext.jar --dex-file=/system/framework/framework.jar --dex-file=/system/framework/telephony-common.jar --dex-file=/system/framework/voip-common.jar --dex-file=/system/framework/ims-common.jar --dex-file=/system/framework/org.apache.http.legacy.boot.jar --dex-file=/system/framework/android.hidl.base-V1.0-java.jar --dex-file=/system/framework/android.hidl.manager-V1.0-java.jar --dex-file=/system/framework/radio_interactor_common.jar --oat-file=/data/dalvik-cache/arm64/system@framework@boot.oat --instruction-set=arm64 --instruction-set-features=a53 --base=0x70c9a000 --runtime-arg -Xms64m --runtime-arg -Xmx64m --image-classes=/system/etc/preloaded-classes --compiled-classes=/system/etc/compiled-classes --dirty-image-objects=/system/etc/dirty-image-objects --instruction-set-variant=generic --instruction-set-features=default
  

App的安装

dex2oat-cmdline = --zip-fd=12 --zip-location=base.apk --input-vdex-fd=-1 --output-vdex-fd=14 --oat-fd=13 --oat-location=/data/app/vmdl1712710097.tmp/oat/arm64/base.odex --instruction-set=arm64 --instruction-set-variant=cortex-a53 --instruction-set-features=default --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=quicken -j4 --swap-fd=15 --classpath-dir=/data/app/vmdl1712710097.tmp

profile-guided compilation(base.art and base.odex)

• BackgroundDexOptService发起

• profile文件

  angler:/ # ls -l  /data/misc/profiles/cur/0/com.aurorasoftworks.quadrant.ui.professional/                                                                               
  total 0
  -rw------- 1 u0_a74 u0_a74 0 1970-02-21 08:36 primary.prof
  

• dex2oat编译

  dex2oat-cmdline = --zip-fd=12 --zip-location=base.apk --input-vdex-fd=14 --output-vdex-fd=15 --oat-fd=13 --oat-location=/data/app/com.aurorasoftworks.quadrant.ui.professional-VH_ydz-pdzC-HwMoMrkyjA==/oat/arm64/base.odex --instruction-set=arm64 --instruction-set-variant=cortex-a53 --instruction-set-features=default --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed-profile -j4 --swap-fd=16 --app-image-fd=17 --image-format=lz4 --profile-file-fd=18 --classpath-dir=/data/app/com.aurorasoftworks.quadrant.ui.professional-VH_ydz-pdzC-HwMoMrkyjA==
  

动态加载dex

01-12 12:22:52.992 12046 12046 W dex2oat : Using default instruction set features for ARM CPU variant (default) using conservative defaults
01-12 12:22:52.993 12046 12046 I dex2oat : /system/bin/dex2oat -j4 --dex-file=/data/data/com.netease.newsreader.activity/files/tdata_VnV324.jar --output-vdex-fd=56 --oat-fd=57 --oat-location=/data/data/com.netease.newsreader.activity/files/oat/arm/tdata_VnV324.odex --compiler-filter=quicken
01-12 12:22:53.755 12046 12046 I dex2oat : dex2oat took 763.301ms (290.864ms cpu) (threads: 4) arena alloc=11KB (12000B) java alloc=98KB (101152B) native alloc=1328KB (1360200B) free=2MB (2309816B)

01-12 12:23:24.391 12156 12156 W dex2oat : Using default instruction set features for ARM CPU variant (default) using conservative defaults
01-12 12:23:24.392 12156 12156 I dex2oat : /system/bin/dex2oat -j4 --dex-file=/data/data/com.netease.newsreader.activity/files/tdata_GBG382.jar --output-vdex-fd=50 --oat-fd=51 --oat-location=/data/data/com.netease.newsreader.activity/files/oat/arm/tdata_GBG382.odex --compiler-filter=quicken
01-12 12:23:25.688 12156 12156 I dex2oat : dex2oat took 1.298s (487.876ms cpu) (threads: 4) arena alloc=8KB (9184B) java alloc=221KB (226544B) native alloc=1265KB (1296200B) free=2MB (2373816B)

uiautomator

• 前提

  若未配置WITH_DEXPREOPT，则在首次启动uiautomator时也会触发dex2oat的编译

• 启动uiautomator

  $ adb shell uiautomator -h 
  

• dex2oat编译

  01-02 05:54:26.089 30222 30222 D AndroidRuntime: >>>>>> START com.android.internal.os.RuntimeInit uid 2000 <<<<<<
  01-02 05:54:26.141 30222 30222 I app_process: Using an offset of 0xff3d8000 from default art base address of 0x70000000
  01-02 05:54:26.141 30222 30222 I app_process: GenerateImage: /system/bin/dex2oat --image=/data/local/tmp/dalvik-cache/arm64/system@framework@boot.art --dex-file=/system/framework/core-oj.jar --dex-file=/system/framework/core-libart.jar --dex-file=/system/framework/conscrypt.jar --dex-file=/system/framework/okhttp.jar --dex-file=/system/framework/bouncycastle.jar --dex-file=/system/framework/apache-xml.jar --dex-file=/system/framework/legacy-test.jar --dex-file=/system/framework/ext.jar --dex-file=/system/framework/framework.jar --dex-file=/system/framework/telephony-common.jar --dex-file=/system/framework/voip-common.jar --dex-file=/system/framework/ims-common.jar --dex-file=/system/framework/org.apache.http.legacy.boot.jar --dex-file=/system/framework/android.hidl.base-V1.0-java.jar --dex-file=/system/framework/android.hidl.manager-V1.0-java.jar --dex-file=/system/framework/radio_interactor_common.jar --oat-file=/data/local/tmp/dalvik-cache/arm64/system@framework@boot.oat --instruction-set=arm64 --instruction-set-features=a53 --base=0x6f3d8000 --runtim
  01-02 05:54:26.257 30224 30224 I dex2oat : /system/bin/dex2oat --image=/data/local/tmp/dalvik-cache/arm64/system@framework@boot.art --dex-file=/system/framework/core-oj.jar --dex-file=/system/framework/core-libart.jar --dex-file=/system/framework/conscrypt.jar --dex-file=/system/framework/okhttp.jar --dex-file=/system/framework/bouncycastle.jar --dex-file=/system/framework/apache-xml.jar --dex-file=/system/framework/legacy-test.jar --dex-file=/system/framework/ext.jar --dex-file=/system/framework/framework.jar --dex-file=/system/framework/telephony-common.jar --dex-file=/system/framework/voip-common.jar --dex-file=/system/framework/ims-common.jar --dex-file=/system/framework/org.apache.http.legacy.boot.jar --dex-file=/system/framework/android.hidl.base-V1.0-java.jar --dex-file=/system/framework/android.hidl.manager-V1.0-java.jar --dex-file=/system/framework/radio_interactor_common.jar --oat-file=/data/local/tmp/dalvik-cache/arm64/system@framework@boot.oat --instruction-set=arm64 --instruction-set-features=a53 --base=0x6f3d8000 --runtime-arg -Xms64m -
  

• 编译产物

  $ ls -l /data/local/tmp/dalvik-cache/arm64/                                                                                                              
  total 89816
  -rw-r--r-- 1 shell shell    17024 2012-01-02 05:55 system@framework@android.test.runner.jar@classes.dex
  -rw-r--r-- 1 shell shell   119380 2012-01-02 05:55 system@framework@android.test.runner.jar@classes.vdex
  -rw-r--r-- 1 shell shell 10784768 2012-01-02 05:55 system@framework@boot.art
  -rw-r--r-- 1 shell shell 42107520 2012-01-02 05:55 system@framework@boot.oat
  -rw-r--r-- 1 shell shell 38225946 2012-01-02 05:55 system@framework@boot.vdex
  -rw-r--r-- 1 shell shell    25216 2012-01-02 05:55 system@framework@uiautomator.jar@classes.dex
  -rw-r--r-- 1 shell shell   549570 2012-01-02 05:55 system@framework@uiautomator.jar@classes.vdex
  

dex2oat相关配置

pm.dexopt相关

angler:/ # getprop|grep pm.dexopt
[pm.dexopt.ab-ota]: [speed-profile]
[pm.dexopt.bg-dexopt]: [speed-profile]
[pm.dexopt.boot]: [verify]
[pm.dexopt.first-boot]: [quicken]
[pm.dexopt.install]: [quicken]

这些属性定义在build/target/product/core_minimal.mk中

dex2oat编译线程个数

• 默认为设备cpu核数

• dalvik.vm.boot-dex2oat-threads

  • number of threads to use during boot time
  • 若配置WITH_DEXPREOPT为TRUE, 则boot阶段没有要编译的东西
  • 若配置WITH_DEXPREOPT为false，则会编译
    • services.jar
    • ethernet-service.jar
    • wifi-service.jar
    • com.android.location.provider.jar
    • javax.obex.jar

• dalvik.vm.dex2oat-threads

  • number of threads to use after boot time
  • 特指PackageManager.DexOptimizer及之后的app安装