From: Daniel Jacobowitz <drow@false.org>
To: Nick Roberts <nickrob@snap.net.nz>
Cc: gdb@sources.redhat.com
Subject: Re: stepping over longjmp
Date: Fri, 04 Aug 2006 13:19:00 -0000 [thread overview]
Message-ID: <20060804131913.GB26799@nevyn.them.org> (raw)
In-Reply-To: <17619.308.218261.761948@kahikatea.snap.net.nz>
On Fri, Aug 04, 2006 at 08:11:32PM +1200, Nick Roberts wrote:
>
> With current CVS GDB and Fedora Core 5 i686 i386 GNU/Linux (2.6.17-1.2157 but
> also 2.6.15) when I try to step over longjmp (using next) I get the following
> error:
>
> Warning:
> Cannot insert breakpoint -59.
> Error accessing memory address 0x226092c5: Input/output error.
>
> ISTR that this was also the case with FC4 and have only recently realised that
> you can step usefully step over a longjmp call after trying it on Mandrake 9
> (2.4.19)
>
> Is this a known kernel problem or a bug in GDB?
Has nothing to do with the kernel. I imagine that this is the problem
I discussed on this list a while ago, CC'd to libc-alpha; glibc now
uses a canary in the jmp_buf which GDB has no way to access.
Does export LD_POINTER_GUARD=0 make a difference?
--
Daniel Jacobowitz
CodeSourcery
next prev parent reply other threads:[~2006-08-04 13:19 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-04 8:13 Nick Roberts
2006-08-04 13:19 ` Daniel Jacobowitz [this message]
2006-08-04 22:20 ` Nick Roberts
2006-08-04 23:45 ` Daniel Jacobowitz
2006-08-05 2:10 ` Nick Roberts
2006-08-05 2:33 ` Daniel Jacobowitz
2006-08-05 6:10 ` Nick Roberts
2006-08-05 12:28 ` Eli Zaretskii
2006-08-05 12:40 ` Mark Kettenis
2006-08-05 14:07 ` Daniel Jacobowitz
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