[lldb-dev] sharing code between lldb and AddressSanitizer

[Kostya Serebryany]

On Wed, Nov 30, 2011 at 2:56 PM, Greg Clayton <gclayton at apple.com> wrote:

> Yes, LLDB can do this.
>
> When you are symbolicating, are you symbolicating using an address from a
> live process,


This is how I want it to work. And I want it to happen inside that process.


> or just using the virtual addresses in an object file itself?
>

This is how it works now.
asan prints a line like
   /home/kcc/llvm/build/a.out+0x402661
and then addr2line/atos does symbolization offline.

--kcc


>
> If you are symbolicating using an address from the file, we already have a
> little C++ example for you:
>
> https://llvm.org/svn/llvm-project/lldb/trunk/examples/lookup/main.cpp
>
> If you want to load a bunch of files from a process at the addresses they
> were at when a backtrace or sample was taken, let me know. The example
> would change a little bit, but not too much.
>
> Greg Clayton
>
>
> On Nov 29, 2011, at 5:56 PM, Kostya Serebryany wrote:
>
> > Hello,
> >
> > I am working on integrating AddressSanitizer (aka asan,
> http://clang.llvm.org/docs/AddressSanitizer.html) run-time library with
> the llvm compiler-rt.
> > Asan needs to symbolize PCs, i.e. given a value of a PC it needs to
> produce the file name and the line number (if debug info is present).
> > Currently, this is achieved by printing the PCs as
> /path/to/object/file+offset and filtering the output with a script which
> uses addr2line/atos.
> > Ideally, symbolization should happen inside the process and should not
> require post processing.
> >
> > I would expect that lldb already has such functionality, right?
> > Somewhere in include/lldb/Symbol/Symtab.h?
> > Does it work on both Linux and Mac?
> > Do you think that it is possible/desirable to have this kind of code
> sharing between lldb and asan?
> > Will that work with the current build system (where lldb and
> compiler-rt/lib/asan are separate subprojects)?
> >
> > Thanks,
> >
> > --kcc
> > _______________________________________________
> > lldb-dev mailing list
> > lldb-dev at cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
>
>
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