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procfs/do_fork: wait until procfs entries are registered

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Do not return from fork() until mcctrl side has created mckernel's
procfs entries for the child PID.

This fixes programs doing fork() immediately followed by opening
/proc/<child pid>/something, and would get some error

Refs: #1189
Change-Id: Ie10ea56b65c55f59e96a1ab6ef83a1070e36048d
This commit is contained in:
Dominique Martinet
2018-08-30 14:13:38 +09:00
committed by Masamichi Takagi
parent b11377f2e9
commit ecc850dfef
4 changed files with 37 additions and 13 deletions
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3
executer/kernel/mcctrl/mcctrl.h
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@@ -507,7 +507,8 @@ struct procfs_file {
};
void procfs_answer(struct mcctrl_usrdata *ud, int pid);
int procfsm_packet_handler(void *os, int msg, int pid, unsigned long arg);
int procfsm_packet_handler(void *os, int msg, int pid, unsigned long arg,
unsigned long resp_pa);
void add_tid_entry(int osnum, int pid, int tid);
void add_pid_entry(int osnum, int pid);
void delete_tid_entry(int osnum, int pid, int tid);