[R-SIG-Mac] Advise on building R on OSX without optimization for debugging

[Dmitriy Selivanov]

Thanks, Simon,
That helped a lot and I was able to debug the error.
Also I got another advice in a private email from Rodney Sparapani where he
suggested making symlinks to libRblas.dylib, libR.dylib in the workdir.
That worked as well.


On Thu, Jul 9, 2020 at 1:16 AM Simon Urbanek <simon.urbanek using r-project.org>
wrote:

> Dmitriy,
>
> due to permissions and the various limitations on passing environment
> variables across processes it is often easier to simply run R and attach
> the debugger to it:
>
> $ R
> [...]
> > Sys.getpid()
> [1] 89955
> >
>
> $ sudo lldb
> Password:
> (lldb) attach 89955
> [...]
> (lldb) c
> Process 89955 resuming
>
> Also note that you shouldn't change Makeconf by hand, simply supply any
> CFLAGS you need to configure, e.g.:
>
> ../R-devel/configure --enable-R-shlib 'CFLAGS=-Wall -g -O0'
> 'CXXFLAGS=-Wall -g -O0'
>
> Cheers,
> Simon
>
>
> > On Jul 8, 2020, at 11:08 PM, Dmitriy Selivanov <
> selivanov.dmitriy using gmail.com> wrote:
> >
> > Dear all,
> >
> > I'm trying to debug a segfault reported here
> > https://bugs.r-project.org/bugzilla/show_bug.cgi?id=17850 (thanks Kevin
> for
> > the nice article
> > https://kevinushey.github.io/blog/2015/04/13/debugging-with-lldb/ about
> > debugging with lldb)
> >
> > I need to compile R without optimization (with the O0 flag) instead of
> > using binaries provided by Simon.
> >
> > Here I have difficulties. What I've tried:
> >
> >   1. Downloaded latest R-devel from
> >   https://stat.ethz.ch/R/daily/R-devel.tar.gz
> >   2. Downloaded xz and pcre2 as suggested here
> >   https://mac.r-project.org/tools/
> >   3. run ./confilgure
> >   4. replaced O2 with O0 in Makeconf
> >   5. make
> >
> > Now R is compiled and I can launch it with ./bin/R. However when I run it
> > with lldb
> >
> >   1. ./bin/R -d lldb
> >   2. run
> >
> > I'm, getting:
> >
> > Process 74482 launched:
> > '/Users/dmitry.selivanov/Downloads/R-devel/bin/exec/R' (x86_64)
> >
> > dyld: Library not loaded: libRblas.dylib
> >
> >  Referenced from: /Users/dmitry.selivanov/Downloads/R-devel/bin/exec/R
> >
> >  Reason: image not found
> >
> > Process 74482 stopped
> >
> > * thread #1, stop reason = signal SIGABRT
> >
> >    frame #0: 0x0000000100574ebe dyld`__abort_with_payload + 10
> >
> > dyld`__abort_with_payload:
> >
> > ->  0x100574ebe <+10>: jae    0x100574ec8               ; <+20>
> >
> >    0x100574ec0 <+12>: movq   %rax, %rdi
> >
> >    0x100574ec3 <+15>: jmp    0x1005733e8               ; cerror_nocancel
> >
> >    0x100574ec8 <+20>: retq
> >
> > Target 0: (R) stopped.
> >
> >
> > Any suggestions? Things are much easier on linux-based docker images,
> but I
> > can't reproduce the reported bug there...
> >
> >
> > Regards
> > Dmitriy Selivanov
> >
> >       [[alternative HTML version deleted]]
> >
> > _______________________________________________
> > R-SIG-Mac mailing list
> > R-SIG-Mac using r-project.org
> > https://stat.ethz.ch/mailman/listinfo/r-sig-mac
> >
>
>

-- 
Regards
Dmitriy Selivanov

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