android_启动流程.docVIP

android 启动流程 In this topic you will learn some information about Android process management. First let’s take a look at the launched processes during Android booting. USER PID PPID VSIZE RSS WCHAN PC NAME root 1 0 264 176 c00acc6c 0000c36c S /init root 28 1 724 308 c0051354 afe0c4cc S /system/bin/sh system 30 1 796 248 c026516c afe0b74c S /system/bin/servicemanager root 31 1 1824 316 ffffffff afe0b50c S /system/bin/mountd root 32 1 652 248 c02976e0 afe0c0bc S /system/bin/debuggerd radio 33 1 5344 664 ffffffff afe0bdbc S /system/bin/rild root 34 1 71028 18828 c00ad308 afe0b874 S zygote media 37 1 16812 3456 ffffffff afe0b74c S /system/bin/mediaserver root 39 1 788 288 c02f9ae4 afe0b50c S /system/bin/installd system 86 34 187756 21836 ffffffff afe0b74c S system_server radio 118 34 103476 13896 ffffffff afe0c824 S com.android.phone app_4 124 34 117848 19248 ffffffff afe0c824 S cess.acore app_5 139 34 98672 11516 ffffffff afe0c824 S com.android.mms app_3 151 34 92096 10976 ffffffff afe0c824 S com.android.alarmclock app_6 161 34 94436 12616 ffffffff afe0c824 S com.android.calendar app_9 173 34 93248 11728 ffffffff afe0c824 S cess.media app_15 182 34 91848 9764 ffffffff afe0c824 S com.android.voicedialer app_16 190 34 94524 10812 ffffffff afe0c824 S cess.im They can be divided into three kinds. Root Process init is the first process after kernel booting. The major task it performs: l Parser and execute init.rc and init.%hardware%.rc l Automatically generate device node under /dev l Start log and property service l Monitor for device, property set and child process exit events Native Application Process According to init.rc, init will fork the following native application process. console: star a shell. servicemanager: start binder IPC service manager. mountd: mount all fs defined in /system/etc/mountd.conf if started, receive commands through local socket to mount any fs. debuggerd: start debug system. rild: start radio interface layer daemon. zygote: st