1. adb shell kill -9 pid_of_app

AMS定義了AppDeathRecipient

APP 在 attachApplication -> attachApplicationLocked

AMS里會注冊 App 進程的 BinderDeath通知

AppDeathRecipient adr = new AppDeathRecipient(app, pid, thread);

thread.asBinder().linkToDeath(adr, 0);

當App進程被殺了后

binder里的 binder_fops就會調用

binder_release -> binder_deferred_func -> binder_deferred_release

-> BINDER_WORK_DEAD_BINDER(binder_thread_read) -> BR_DEAD_BINDER(binder_thread_read) -> BR_DEAD_BINDER(IPCThreadState::executeCommand)

-> (BpBinder->sendObituary) -> (BpBinder->reportOneDeath) -> (JavaDeathRecipient->binderDied)

-> BinderProxy.sendDeathNotice

-> ActivityManagerService.binderDied -> appDiedLocked -> handleAppDiedLocked 清理相關資源 resumeFocusedStackTopActivityLocked

注意，這種方式kill掉的進程不會調用 onDestroy

link to death

2. 通過Recents里removeTasks殺掉進程

AMS.removeTask -> ASS.removeTaskByIdLocked ->

TaskRecord.removeTaskActivitiesLocked -> 這里面會去finish掉當前Activity, 也就是會調用onDestroy

ASS.cleanUpRemovedTaskLocked -> ProcessRecord.kill ->

Process.killProcessQuiet -> sendSignalQuiet -> kill -9 pid (類似于kill -9)

Process.killProcessGroup -> killProcessGroup

后面的過程的1一樣，通過binder death去通知AMS

總結

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