当zygote进程启动时,在执行到
try {
parsedArgs = new ZygoteConnection.Arguments(args);
ZygoteConnection.applyDebuggerSystemProperty(parsedArgs);
ZygoteConnection.applyInvokeWithSystemProperty(parsedArgs);
Slog.e("Test", "Entered ZygoteInit main/startSystemServer!");
/* Request to fork the system server process */
pid = Zygote.forkSystemServer(
parsedArgs.uid, parsedArgs.gid,
parsedArgs.gids,
parsedArgs.debugFlags,
null,
parsedArgs.permittedCapabilities,
parsedArgs.effectiveCapabilities);
Slog.e("Test", "Entered ZygoteInit main/startSystemServer, pid:"+pid);
} catch (IllegalArgumentException ex) {
throw new RuntimeException(ex);
}
/* For child process */
if (pid == 0) {
handleSystemServerProcess(parsedArgs);
}
return true;
//zygoteinit.java
当FORK完后,进程被复制,这时产生俩个进程,原始ZYGOTE进程,判断pid!=0 return了,因为他产生了一个>0的system server 进程。
而被复制的system server进程复制完后,接着执行handleSystemServerProcess(parsedArgs);
log:
04-20 14:33:19.390 160 160 E Test : Entered ZygoteInit main!
04-20 14:33:24.992 160 160 E Test : Entered ZygoteInit main/startSystemServer!
04-20 14:33:25.007 160 160 E Test : Entered ZygoteInit main/startSystemServer, pid:339
04-20 14:33:25.015 339 339 E Test : Entered ZygoteInit main/startSystemServer, pid:0
04-20 14:33:25.015 339 339 E Test : Entered ZygoteInit main/startSystemServer/handleSystemServerProcess
04-20 14:33:25.015 339 339 E Test : Entered RuntimeInit zygoteInit!
04-20 14:33:25.023 339 339 E Test : Entered RuntimeInit zygoteInit/invokeStaticMain!startClass:com.android.server.SystemServer args.startArgs:[Ljava.lang.String;@413ece28
04-20 14:33:25.023 339 339 E Test : Entered System main
04-20 14:33:25.609 339 339 I SystemServer: Entered the Android system server!
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