gnu/77818: GDB locks in wait4() when running applications

Seán C. Farley sean-freebsd at
Fri May 20 18:50:06 GMT 2005

The following reply was made to PR gnu/77818; it has been noted by GNATS.

From: =?ISO-8859-1?Q?Se=E1n_C=2E_Farley?= <sean-freebsd at>
To: bug-followup at, sean-freebsd at
Subject: Re: gnu/77818: GDB locks in wait4() when running applications
Date: Fri, 20 May 2005 13:49:13 -0500 (CDT)

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 I am using 5.4-STABLE with sources from May 15th's:
 FreeBSD 5.4-STABLE FreeBSD 5.4-STABLE #0: Sun May 15
 01:46:56 CDT 2005     root at
 I have a new test program[1] that I think shows the problem.  My
 previous program actually showed another bug that has since been fixed.
 Actually, it shows two problems.  When run within the debugger
 (SHELL=3D/bin/sh gdb a.out), the parent will be stuck waiting for a signal
 it will never receive in sigsuspend().
 The other problem is that nanosleep() is exiting immediately with a
 return of zero although the time to sleep has not passed.  To see it do
 this, remove the BROKEN_NANOSLEEP_WITHIN_GDB definition at the top of
 the program and recompile.
 sean-freebsd at

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