From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <cc92302f1f708cb94832992d56bedb51@quintile.net>
From: "Steve Simon" <steve@quintile.net>
Date: Mon,  1 Nov 2010 20:52:31 +0000
To: 9fans@9fans.net
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Subject: [9fans] rfork and nerrlab - I am confused
Topicbox-Message-UUID: 749dd6b0-ead6-11e9-9d60-3106f5b1d025

Hi,

I am trying to understand the implementation of sysrfork() in
/sys/src/9/port/sysproc.c:90.

When the new process is created p->nerrlab is set to zero,
however when sysrfork() returns,as the new process, poperror() is
called will clean up the error stack after the matching waserror()
before the systemcall was dispatched.

This should the (from my reading of it) draw an error from
/sys/src/9/pc/trap.c:739, which doesn't happen.

so, I am wrong about how it works, but how does it?

Am I expected to understand this?

-Steve