Date: Tue, 11 Mar 2003 13:33:15 +0800 From: "David Xu" <davidxu@viatech.com.cn> To: "Alfred Perlstein" <bright@mu.org> Cc: <src-committers@FreeBSD.org>, <cvs-src@FreeBSD.org>, <cvs-all@FreeBSD.org> Subject: Re: cvs commit: src/sys/kern kern_thread.c subr_trap.c Message-ID: <005101c2e78f$b85d0a40$f001a8c0@davidw2k> References: <200303110259.h2B2xor5078625@repoman.freebsd.org> <20030311051206.GZ4145@elvis.mu.org>
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----- Original Message -----=20 From: "Alfred Perlstein" <bright@mu.org> To: "David Xu" <davidxu@FreeBSD.org> Cc: <src-committers@FreeBSD.org>; <cvs-src@FreeBSD.org>; = <cvs-all@FreeBSD.org> Sent: Tuesday, March 11, 2003 1:12 PM Subject: Re: cvs commit: src/sys/kern kern_thread.c subr_trap.c > * David Xu <davidxu@FreeBSD.org> [030310 18:59] wrote: > > davidxu 2003/03/10 18:59:50 PST > >=20 > > FreeBSD src repository > >=20 > > Modified files: > > sys/kern kern_thread.c subr_trap.c=20 > > Log: > > Fix signal delivering bug for threaded process. >=20 > Details, while not manditory are encouraged. See a typical > commit by Dr. Mckusick. >=20 Orignal code would suspend an already suspended thread, if user presses ^Z while a threaded program is running. Also there is a race between job control and thread_exit(), the=20 new code tests job control requesting before thread exits, in wait() syscall, be sure to check process is fully stopped before parent proc thinks child was stopped, this avoids a later SIGCHILD and returns STOPPED status twice for a threaded child proc. > --=20 > -Alfred Perlstein [alfred@freebsd.org] > 'Instead of asking why a piece of software is using "1970s = technology," > start asking why software is ignoring 30 years of accumulated = wisdom.' To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-src" in the body of the message
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