init 服务程序(init.svc.XXX)死亡/重启-SIGCHLD及稳定性杂项记录
目录
init 处理Android 服务程序(init.svc.XXX)死亡/重启过程
c > /proc/sysrq-trigger触发panic
init 处理Android 服务程序(init.svc.XXX)死亡/重启过程
init 启动服务
1、init.rc 中服务,android init重启service(进程)
https://www.cnblogs.com/aspirs/p/11407611.html
Android Init进程对信号的处理流程详细介绍_Android_脚本之家
system\core\init\init.cpp
1、收到子进程退出,会执行 ReapOneProcess 来收割僵尸进程
2、system\core\init\service.cpp
执行service->Reap(siginfo)
1、
2、
SurfaceFlinger 被signal 3 杀再次再次重启zygote 。
进程被杀执行do_exit
void do_exit(long code)
__send_signal 发送信号
java 层杀进程
frameworks/base/core/java/android/os/Process.java
frameworks\base\core\jni\android_util_Process.cpp
稳定性杂项记录
binder 调用时间
log 丢失
system/core/logd/LogBufferElement.cpp
android log丢失(一)使用logd丢失log原理_kc专栏的博客-CSDN博客
04-07 23:35:45.056 29757 30816 I chatty : uid=1000(system) Binder_C expire 2 lines
04-07 23:35:45.162 29757 30788 I chatty : uid=1000(system) Binder_B expire 1 line
04-07 23:35:45.226 29757 29771 I chatty : uid=1000(system) Binder_2 expire 1 line
04-07 23:35:45.683 29757 30848 I chatty : uid=1000(system) Binder_E expire 1 line
04-07 23:35:45.772 29757 29792 I chatty : uid=1000(system) BroadcastQueue expire 1 line
04-07 23:35:45.904 29757 30852 I chatty : uid=1000(system) Binder_10 expire 10 lines
04-07 23:35:45.938 29757 30108 I chatty : uid=1000(system) Binder_6 expire 1 line
04-07 23:35:46.206 29757 29757 I chatty : uid=1000 system_server expire 1 line
04-07 23:35:46.491 29757 30816 I chatty : uid=1000(system) Binder_C expire 1 line
04-07 23:35:46.502 29757 30787 I chatty : uid=1000(system) Binder_A expire 3 lines
04-07 23:35:46.537 29757 29792 I chatty : uid=1000(system) BroadcastQueue expire 2 lines
04-07 23:35:46.633 29757 30788 I chatty : uid=1000(system) Binder_B expire 1 line
04-07 23:35:46.794 29757 30229 I chatty : uid=1000(system) Binder_7 expire 3 lines
04-07 23:35:46.863 29757 29770 I chatty : uid=1000(system) Binder_1 expire 1 line
04-07 23:35:47.394 29757 30093 I chatty : uid=1000(system) Binder_5 expire 9 lines
c > /proc/sysrq-trigger触发panic
vendor.oplus.ha kernel里面没打印全 这个进程去写了 c > /proc/sysrq-trigger触发panic
coredump 生成
get_signal
void do_coredump(const siginfo_t *siginfo){
...
//如果不是android critical svc 就返回
if (strncmp(current->group_leader->comm, "system_server", 16) &&
strncmp(current->group_leader->comm, "surfaceflinger", 16) &&
strncmp(current->group_leader->comm, "com.oppo.camera", 17) && (from_kuid_munged(current_user_ns(), current_uid()) >= 10000) ) {
goto fail;
...
}