similar to: Bitcode generated with LLVM 7.0 used in LLVM 3.4

Hi, I'm working on a tool (KLEE) that interprets LLVM bitcode. One of the things it does is it instruments the LLVM bitcode with checks for division by zero. It does this by injecting calls to a function "klee_div_zero_check(long long divisor)" just before every division instruction (e.g. SDiv). These checks are injected by a pass that has been implemented in KLEE. This

Hi, We're currently upgrading KLEE to work with LLVM >=3.3 and we've hit a problem. It seems r172749 removed support for linking a bitcode archive into a module. KLEE unfortunately depends on this to link in its runtime ( which amongst other things provides a C library [5] ). A first attempt at linking in a bitcode archive ourselves can be seen in [1]. This approach does not work

On Tue, Dec 17, 2013 at 10:31:31AM +0000, Daniel Liew wrote: > Hi, > > We're currently upgrading KLEE to work with LLVM >=3.3 and we've hit a problem. > > It seems r172749 removed support for linking a bitcode archive into a > module. KLEE unfortunately depends on this to link in its runtime ( > which amongst other things provides a C library [5] ). > > A

Hello everyone, I am a novice with KLEE under LLVM. I am trying to build a KLEE project (on a new LLVM environment) and I have the following problem: echo Testing... Testing... echo There should be no assertion fails! There should be no assertion fails! klee -taint=direct taint_direct.o KLEE: output directory = "klee-out-8" klee: error: Cannot find linker input

Hi, The klee library directory is determined at compile time and cannot be changed afterwards. Have a look at tools/klee/main.cpp to see how it is computed. I usually use Klee without any install step, right from the build directory. This has never given me the error you see. Hope this helps, Jonas On Wed, Jun 5, 2013 at 5:26 PM, Alexandru Ionut Diaconescu < alexandruionutdiaconescu at

Hi, I'm currently trying to find and fix memory leaks (compiling with ``-fsanitize=address``) in the KLEE tool [1] an having found some leaks and I'm having trouble suppressing them. I'm trying to suppress them using the ``-fsanitize-blacklist=blacklist.txt`` option as documented at [2]. I'm using Clang 3.7 ( Arch Linux package 3.7.0-6). The sort of reported leaks I see are ```

Hi I use the LDFLAGS=" -flto -fuse-ld=gold -Wl,-plugin-opt=save-temps " to generate the makefile and to make the whole program. However, found four different kinds of bitcode for each target. For example, I am compiling coreutils. For the program "nohup", I can get nohup.0.0.preopt.bc nohup.0.2.internalize.bc nohup.0.4.opt.bc nohup.0.5.precodegen.bc If I am right, I

Hi Teresa Thanks for your very quick and clear explanation. I have one more question. The emit-llvm option will give you the IR for a single source file when you compile it with -c. All of those files when combined give the IR in the preopt.bc temp file. =========== So if I use "clang -emit-llvm -c" to generate the .ll file. It should be the same as the one I generated by using

Hello, I am very new to llvm, but I need to have a fully working llvm / llvm-gcc system built and running on my fedora 21 virtual machine so I can perform some concolic testing with stp. I have installed all upgrades to fedora 21 using yum upgrade. I was able to compile and install llvm fine from the svn repository. I checked out llvm-gcc-4.2 from the repository (revision 234124). I ran

These are the bitcode at different stages of the LTO portion of the compile. LTO merges the IR for all files being linked and optimizes them as a single monolithic module. The preopt.bc is the merged IR just after merging and before performing any LTO optimizations. internalize.bc is after performing whole program internalization. opt.bc is after the optimization pipeline, and .precodegen.bc is

Dear Developers, I am a Master's student at the ECE department of the University of Florida, USA.​​ For my research project, supervised by Prof. Mark Tehranipoor<http://tehranipoor.ece.ufl.edu/> and Prof. Farimah Farahmandi<http://farimah.ece.ufl.edu/>, I need to use Clang LLVM DataflowSanitizer library in KLEE. However, I have faced some difficulties (explained below) while

Are there any "current" Linux distros that have installable packages for llvm, clang, nad klee? I am struggling to get klee built and need a working klee setup asap. Thanks in advance, Donald

Hi, I am trying to evaluate how complex would be to modify KLEE ( http://klee.llvm.org/ ) so that it can run LLVM bitcode compiled from Java code obtained with vmjc (from the VMKIT project). Your feedback will be very appreciated. I am familiar with KLEE but I would like to know more about VMKIT, so please point me to the right docs/source code if appropriate. After a quick look over

Hello, In my reading over the last couple of days, I have read that in order for klee to work with "native" Linux programs, I need to install the uClibc posix support for klee. I am not finding the uClibc source in the llvm svn repository anywhere. Is this still necessary for testing native Linux applications, and if so, where do I get the uClibc source to compile? Thanks in

When I try to execute the following example, I get an error message: /usr/local/lib/ruby/gems/1.8/gems/mocha-0.5.4/lib/mocha/object.rb:40: in `expects'': undefined method `stub'' for nil:NilClass (NoMethodError) from test8.rb:5 What could be the reason? I tried with the latest Mocha Ruby gem, and I also tried it with the Rails plugin. The example: require

Hello, probably it is too late to be involved in GSoC, by I want discuss following idea: KLEE can generate tests only for main function level without any modifications of original code. It passes args specified by command line. I want implement automatic testcase generation for any imported function from tested code without its modification. First: parsing test code would collect input/output

> Excuse me for the diversion but, is that interpreter of LLVM IR available > somewhere? Details on how it works, performance, etc? I'd be interested Yes it is available. The tool (KLEE [1]) is actually a lot more than an interpreter (although it can be used as one). KLEE allows you to mark certain variables (e.g. program inputs) as "symbolic". What this means is that the

Hi I write a LLVM function pass. The pass will loop the basicblock in the function, check the instruction's type with dyn_cast<switchinst>, print the instruction and the basicblock's successors. I think it is not very complex. My bitcode file is about 30M. My CPU is i7-7700(3.6GHz). It has been running for 60 hours but it is still running. I am not sure whether this is a normal

On Sat, Mar 16, 2013 at 06:16:01AM -0700, Hongxu Chen wrote: > Thanks for your help, Wei-Ren and Anton. > > However since I am doing some experiments with klee(http://klee.llvm.org/ > GetStarted.html) and llvm-gcc seems to have better compatibility with it. So I > still hope that I can use llvm-gcc:-) Seems you already found the answer on klee ML. :) Regards, chenwj --

I just discovered two directories with the same number of files and the same number of hard links but different size: # stat /home/david/linuxburg/fax.old/docq_ps.nnnn \ /hdsync/home/david/linuxburg/fax.old/docq_ps.nnnn File: `/home/david/linuxburg/fax.old/docq_ps.nnnn' Size: 8192 Blocks: 16 IO Block: 4096 directory Device: 801h/2049d Inode: 52060