search for: cmovs

While testing for leaks in my own code I noticed some reported memory problems from valgrind, invoked with $ R --vanilla -d "valgrind --leak-check=full" This is on Debian GNU/Linux (testing aka lenny) with a 2.6 kernel, R package version 2.4.1-2. I was running in an emacs shell. The immediate source of all the problems before I get to the prompt is the system dynamic loader

Someone is trying to work on HLVM with me but they're hitting a problem that we have not been able to resolve. Specifically, GCC seems to be performing some kind of sanity check for "stack smashing" and is calling abort because it is unhappy with something that the code is doing. However, I am not sure what and cannot reproduce the problem. The stack trace they have given me is:

It's not THAT bad, but: GNU gdb (GDB) 7.0.1-debian Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was

Hello, KWD crashes almost regularly when trying to start OpenOffice.org. I've attached two output files from valgrind to this e-mail (as suggested by David Reveman in another mail 11.7): Use something like: valgrind --tool=memcheck kde-window-decorator .... I'm using Trevino's git version of Compiz in up-to-date Kubuntu Feisty system. Compiz version is

Another crahs with backtrace: GNU gdb 6.8-debian Copyright (C) 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was

GNU gdb 6.8-debian Copyright (C) 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as

>From a cursory glance, it looks like something is messing with the stack canarys. Probably a stack buffer overflow. On Tue, Mar 10, 2009 at 11:41 PM, Jon Harrop <jon at ffconsultancy.com> wrote: > > Someone is trying to work on HLVM with me but they're hitting a problem that > we have not been able to resolve. Specifically, GCC seems to be performing > some kind of

Hello, I'm running Samba 3.2.5 on Debian, with tdbsam backend. For the past few days, I've had trouble with starting Samba (which I do routinely once a day) but with users unable to login on Windows workstations. When this happens, the current smbd.log shows no activity (not even the "starting samba" event) and the previous day's smbd.log shows entries like these:

Hi! I'm trying to build llvm cvs head on Ubuntu. make command fails with this (VERBOSE=1): llvm[1]: Building Intrinsics.gen.tmp from Intrinsics.td /home/ubuntu/llvm/obj/Debug/bin/tblgen -I /home/ubuntu/llvm/src/lib/VMCore -I/home/ubuntu/llvm/src/include -I /home/ubuntu/llvm/src/lib/Target /home/ubuntu/llvm/src/include/llvm/Intrinsics.td -o

I have a Rails 1.2.3 app (due for an update, I know) running on a Mongrel 1.1.4 behind Apache 2.2.3 mod_proxy on Debian 4.0. It keeps hanging up for no reason I can tell. I have tried everything that anyone has ever hinted at being a solution for this problem: - The application doesn''t use MySQL, so setting the connection timeout won''t help. - Using AR not PStore for sessions. -

Hi Chandler, I feel like this conversation has come full circle. So to ask again: how does one force CMOV to be emitted? You suggested “__builtin_unpredictable()” but that gets lost in various optimization passes. Given other architectures have CMOV like instructions, and given the usefulness of the instruction for performance tuning, it seems like a direct intrinsic would be best. What am I

Dovecot is crashing occasionally for me. Today it crashed six times in quick succession, as I fired up a computer (Mac) I hadn't used in a while, and my mail application (Apple Mail) tried to synchronize many large mailboxes. The log entries look like this: Aug 26 10:26:15 computer dovecot: dovecot: child 23223 (imap) killed with signal 6 (core dumped) Aug 26 10:26:30 computer dovecot:

I can reproduce this by simply issuing: doveadm reload GNU gdb (GDB) 7.0.1-debian Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty"

Dear List: this is a problem that affects my use of R under Debian, but is a problem with using the Java virtual machine. I am turning to this list, since I am hoping someone might have more experience with trying to figure out why Java does not work under Debian than I do. I apologize in advance for trying to exploit list knowledge for a problem that is only tangential to the list. I am

Greetings! I attempted to read a STATA 10 file using the following syntax: library(foreign) data <- read.dta("~/Documents/agestandard/analysis.dta") I got the following error: *** stack smashing detected ***: /usr/lib/R/bin/exec/R terminated ======= Backtrace: ========= /lib/tls/i686/cmov/libc.so.6(__fortify_fail+0x48)[0xb7c13138]

I’m struggling to find cases where __builtin_unpredictable() works at all. Even if we ignore cmp/br into switch conversion, it still doesn’t work: int test_cmov(int left, int right, int *alt) { return __builtin_unpredictable(left < right) ? *alt : 999; } Should generate: test_cmov: movl $999, %eax cmpl %esi, %edi cmovll (%rdx), %eax retq But currently generates: test_cmov: movl $999,

Program terminated with signal 6 GNU gdb (GDB) 7.0-debian Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was

This is 1.0.13, the processes crashed a few seconds apart from each other: GNU gdb 6.7.1-debian Copyright (C) 2007 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show

> On Sep 13, 2019, at 10:45 AM, Chandler Carruth <chandlerc at gmail.com> wrote: > > On Fri, Sep 13, 2019 at 1:33 AM David Zarzycki via llvm-dev <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote: > Hi Chandler, > > The data-invariant feature sounds great but what about the general case? When performance tuning code, people sometimes need

Hello, I've compiled some Fortran code and dyn.loaded it into R as in the "Writing R Extensions" manual. The code receives four large arrays of doubles from R (size about 3000x3000), and runs through several loops with BLAS calls. However, I get a memory corruption error when running it -- the full output is attached at the end. I've been trying to pinpoint and solve