Hi all, Im studing how Android creates new processes and found two scenarios.
when I am running native programs on a terminal on Android (ps, ls, mkdir, etc) all programs are created in the standard way, that is, fork (clone) and execve system calls. The process name on task struct is set by the putname() on the sys_execve syscall handler. But when I run a Android application such the Calculator, for example, i found 6 new tasks (processes or threads) forked by zygote. In fact, zygote forks just one process and this new process spawns 4 new processes and set their names using set_task_comm() and the last one forks an aditional process. And at the last set_task_comm() is called for the first forked process from zygote. So there are two ways for set the task->comm field for a process: The standard way (using execve and putname()) and a new way used by Android using sys_prctl who calls set_task_comm(). Does anyone have more information on how processes are created on Android and why a App needs all theis tasks forked by zygote? Why execve is not used and what is used instead? I m using Android for Mips using the Arriba QEMU emulator as my experimentation platform. Thanks, -- unsubscribe: android-kernel+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-kernel
