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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/ikc.c
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@@ -207,7 +207,8 @@ static int syscall_packet_handler(struct ihk_ikc_channel_desc *c,
case SCD_MSG_PROCFS_TID_CREATE:
case SCD_MSG_PROCFS_TID_DELETE:
procfsm_packet_handler(__os, pisp->msg, pisp->pid, pisp->arg);
procfsm_packet_handler(__os, pisp->msg, pisp->pid, pisp->arg,
pisp->resp_pa);
break;
case SCD_MSG_GET_VDSO_INFO: