[klee-dev] Linking C++ runtime

[Dan Liew]

On 26 September 2016 at 20:56, Eric Laberge <e.laberge at gmail.com> wrote:
> Hello!
>
> I am trying to get KLEE running a simple C++ app through Docker, but am obviously not doing it correctly. Anybody got it working?
>
> Here’s what I got:
>
> klee at 77c9c1d55f4a:/tmp$ cat hello.cpp
> int main() {
>   return 0;
> }
>
> klee at 77c9c1d55f4a:/tmp$ clang++ -c hello.cpp -emit-llvm -g -o hello.bc
>
> klee at 77c9c1d55f4a:/tmp$ klee -link-llvm-lib=/usr/lib/gcc/x86_64-linux-gnu/4.8/libstdc++.so hello.bc
> KLEE: Linking in library: /usr/lib/gcc/x86_64-linux-gnu/4.8/libstdc++.so.
>
> klee: /usr/lib/llvm-3.4/build/include/llvm/Support/Casting.h:97: static bool llvm::isa_impl_cl<llvm::object::ObjectFile, const llvm::object::Binary *>::doit(const From *) [To = llvm::object::ObjectFile, From = const llvm::object::Binary *]: Assertion `Val && "isa<> used on a null pointer"' failed.
> 0  klee            0x0000000000dd4432 llvm::sys::PrintStackTrace(_IO_FILE*) + 34
> 1  klee            0x0000000000dd4224
> 2  libpthread.so.0 0x00002ac38e4ee330
> 3  libc.so.6       0x00002ac390babc37 gsignal + 55
> 4  libc.so.6       0x00002ac390baf028 abort + 328
> 5  libc.so.6       0x00002ac390ba4bf6
> 6  libc.so.6       0x00002ac390ba4ca2
> 7  klee            0x00000000005c8135 klee::linkWithLibrary(llvm::Module*, std::string const&) + 3925
> 8  klee            0x0000000000576c6c main + 5740
> 9  libc.so.6       0x00002ac390b96f45 __libc_start_main + 245
> 10 klee            0x00000000005718d9
> Aborted
>

KLEE does not properly support running C++ code. Some things might
work but a lot of things don't.

The option you are using is meant for use on archives of LLVM bit code
files, not native dynamic libraries. I protested about the inclusion
of this option in KLEE because I believe that the majority of the
linking should be done outside of KLEE but I was over-ruled.