Displaying 20 results from an estimated 6000 matches similar to: "[LLVMdev] SIGFPE generation"
2006 Apr 19
0
[LLVMdev] floating point exception and SSE2 instructions
On Wed, 19 Apr 2006 19:28:34 +0100
Simon Burton <simon at arrowtheory.com> wrote:
>
> >From what I remember, this is a bug in debian libc:
> some floating point flags are set incorrectly causing SIGFPE.
> Can't find the bug report ATM.
Oh, it just showed up on numpy-discussion:
http://sources.redhat.com/bugzilla/show_bug.cgi?id=10
"""
#include
2006 Apr 19
2
[LLVMdev] floating point exception and SSE2 instructions
On Tue, 18 Apr 2006 23:27:39 -0700
Evan Cheng <evan.cheng at apple.com> wrote:
> Hi Simon,
>
> The x86 backend does generate scalar SSE2 instructions. For your
> example, it should emit something like:
Oh, how did you get this ?
[...]
>
> There is nothing here that should cause an exception. Are you using a
> release or cvs?
CVS.
>From what I remember,
2015 Jul 31
0
[LLVMdev] Asan: Print stacktrace on SIGFPE
On Fri, Jul 31, 2015 at 5:15 AM, Karl Skomski <karl at skomski.com> wrote:
> Would it make sense to add the possibility to print a stacktrace also on
> SIGFPE and not only on SIGSEGV or SIGBUS?
>
Yes, under a separate flag (handle_sigfpe=1).
I think it's fine to have this flag on by default.
Would you like to contribute a patch?
> Only noticed that LibFuzzer doesn't
2015 Jul 31
2
[LLVMdev] Asan: Print stacktrace on SIGFPE
Would it make sense to add the possibility to print a stacktrace also on
SIGFPE and not only on SIGSEGV or SIGBUS?
Only noticed that LibFuzzer doesn't generate any crash report because asan
is not handling the signal.
Kind regards,
Karl Skomski
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2004 Aug 18
1
Hangups - SIGFPE in dsp.c
Hi,
I'm running the latest CVS HEAD version of asterisk, and I'm experiencing
hangups during voice conversation. This happens quite regularely and
often.
The problem is in dsp.c, line 1235, where it says
accum /= len;
But `len', at this point, is 0, resulting in a SIGFPE. The routine
ast_frame *i4l_read() in channels/chan_modem_i4l.c:411 is
setting p->fr.datalen to
2019 Jun 15
3
Constrained integer DIV (WAS: Re: Planned change to IR semantics: constant expressions never have undefined behavior)
> -----Original Message-----
> From: Cameron McInally <cameron.mcinally at nyu.edu>
> Sent: Friday, June 14, 2019 4:02 PM
> To: Eli Friedman <efriedma at quicinc.com>; LLVM Developers Mailing List <llvm-
> dev at lists.llvm.org>
> Cc: Craig Topper <craig.topper at gmail.com>; Kaylor, Andrew
> <andrew.kaylor at intel.com>
> Subject: [EXT]
2011 Jun 14
3
[LLVMdev] Is LLVM expressive enough to represent asynchronous exceptions?
Hi Chris, I've CC'd Eric Botcazou in the hope that he will clear up just what
the Ada front-end needs from the rest of the compiler as far as asynchronous
exceptions are concerned.
>> gcc Ada turns signals into exceptions. As far as I know it does this
>> completely asynchronously, and the fact that LLVM doesn't support this
>> is rather bad as far as Ada is
2006 Apr 19
2
[LLVMdev] floating point exception and SSE2 instructions
On Thu, 20 Apr 2006, Simon Burton wrote:
>>> From what I remember, this is a bug in debian libc:
>> some floating point flags are set incorrectly causing SIGFPE.
>> Can't find the bug report ATM.
>
> Oh, it just showed up on numpy-discussion:
> http://sources.redhat.com/bugzilla/show_bug.cgi?id=10
>
> """
> #include <fenv.h>
> void
2016 Dec 19
5
Do people use HostbasedAuthentication?
Do people actually use HostbasedAuthentication? It needs several
steps to enable and generally seems quite arcane by now. I wonder
if this is something that could be trimmed away...
--
Christian "naddy" Weisgerber naddy at mips.inka.de
1998 Jul 27
1
R-beta: R has underflows on sparc-redhat-linux
Hi --
I'm trying to package R for inclusion on some upcoming Red Hat
Powertools distribution. I have started with the 0.61 version
packaged by Martyn Plummer <plummer at iarc.fr> (Thanks Martyn!)
and have upgraded to 0.62-2. I have succeeded in running R demo's
on i386-redhat-linux-gnu, and now I am also trying to get the
alpha and sparc versions working.
On sparc-redhat-linux,
2016 Feb 27
0
Possible soundness issue with available_externally (split from "RFC: Add guard intrinsics")
Just as a reality check, I wrote up a demonstration where one link
order causes a SIGFPE and another doesn't (and the program is well
defined, as far as I can tell). All TUs are compiled with -O3. This is also
an instance where we don't actually speculate an inline function, but only
DSE across it (after deducing readnone).
Here's the link https://github.com/sanjoy/comdat-ipo
2016 Aug 18
5
fenv.h vs the optimizer
Howdy all,
I've been playing around with programs that use the C11 fenv.h.
It seems that, currently, the LLVM compiler does not regard to the
exception-flag side-effects of floating point operations?
When run on my macbook, the example code on
http://en.cppreference.com/w/c/numeric/fenv/FE_exceptions does not print
all the expected exceptions.
Other examples:
void foo() {
2016 Feb 28
2
Possible soundness issue with available_externally (split from "RFC: Add guard intrinsics")
So in this case, ptr[0] = 10 is propagated into one copy of maybe_devide
(in source a), and ptr[0]=10 in caller_a is DSEed ?
David
On Sat, Feb 27, 2016 at 1:41 PM, Sanjoy Das via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Just as a reality check, I wrote up a demonstration where one link
> order causes a SIGFPE and another doesn't (and the program is well
> defined, as
2017 Mar 15
3
Speculative execution of FP divide Instructions - Call-Graph Simplify
[+current llvm-dev address]
On 03/15/2017 09:23 AM, Hal Finkel wrote:
> Hi Samuel,
>
> What are you taking about? ;)
>
> The only way to get a SIGFPE from a floating-point division by zero is
> to modify the floating-point environment to enable those exceptions.
> We don't support that (*). In the default (supported) environment,
> floating point division is well
2016 Feb 29
3
Possible soundness issue with available_externally (split from "RFC: Add guard intrinsics")
On Sat, Feb 27, 2016 at 1:41 PM, Sanjoy Das
<sanjoy at playingwithpointers.com> wrote:
> Just as a reality check, I wrote up a demonstration where one link
> order causes a SIGFPE and another doesn't (and the program is well
> defined, as far as I can tell). All TUs are compiled with -O3. This is also
> an instance where we don't actually speculate an inline function,
2015 Dec 09
2
CentOS 6, bareos, kerberos?
After upgradeding to bareos 15.2, which also has a web ui, thereby making
it usable (since the command line tool, bconsole, does not have a paging
mechanism, and its sytax for choosing files to restore is, let us say,
arcane), I've got another question: is *anyone* using bareos with
kerberos? I see that they have in alpha(?) tls support, which isn't a
great idea, given the recent
2002 Feb 20
2
feature request: add -a to scp for archive-style copy
This is a feature request for scp. scp has no easy option to copy
symlinks, etc. to reproduce a directory tree. The -r option follows
symlinks and reads the data out of device files when copying. A few
years ago, the -a option was added to normal cp, replacing the
cumbersome and arcane
(cd wherever1 ; tar cf - whatever) | (cd wherever2 ; tar xpf - )
with
cp -a wherever1/whatever wherever2
2007 Apr 02
1
possible division by zero in screen.c
Hi,
In detectRefreshRateOfScreen(), we have
s->redrawTime = 1000 / s->opt[COMP_SCREEN_OPTION_REFRESH_RATE].value.i;
When the refresh rate is autodetected through RandR's XRRConfigCurrentRate
function, 0 can be returned in certain cases, leading to division by zero. An
example of this situation would be the DynamicTwinView option in the nVidia
proprietary drivers[0] (note that this
2011 Jun 14
0
[LLVMdev] Is LLVM expressive enough to represent asynchronous exceptions?
On Jun 14, 2011, at 10:27 AM, Duncan Sands wrote:
> Hi Chris, I've CC'd Eric Botcazou in the hope that he will clear up just what
> the Ada front-end needs from the rest of the compiler as far as asynchronous
> exceptions are concerned.
>
>>> gcc Ada turns signals into exceptions. As far as I know it does this
>>> completely asynchronously, and the fact
2004 Feb 12
1
OpenSSH_3.7.1p2 Floating point exception on Opteron
I'm getting a floating point exception from ssh on an opteron running Linux
(in 64 bit). It happens only when I ssh out to a server not supporting
SSHv2 and when its public key is not already in the key file. Right after I
answer "yes" to the "Are you sure?" prompt I get the exception.
Here is the stack trace:
Program received signal SIGFPE, Arithmetic exception