Running R with lldb

One of the suggestions in

https://cran.r-project.org/doc/manuals/r-devel/R-exts.html#Debugging-on-macOS

should help.  Both worked for my build of R-devel yesterday ....


On 05/08/2020 14:25, Duncan Murdoch wrote:

I'm now successfully building R-devel in /Users/murdoch/R/R-devel.? If I
run it from that directory using

  ?bin/R -d lldb

it starts, but "run" gives this error:

Process 11165 launched: '/Users/murdoch/R/R-devel/bin/exec/R' (x86_64)
dyld: Library not loaded: libRblas.dylib
  ? Referenced from: /Users/murdoch/R/R-devel/bin/exec/R
  ? Reason: image not found
Process 11165 stopped
* thread #1, stop reason = signal SIGABRT
  ??? frame #0: 0x00000001004c7ede dyld`__abort_with_payload + 10
dyld`__abort_with_payload:
->? 0x1004c7ede <+10>: jae??? 0x1004c7ee8?????????????? ; <+20>
  ??? 0x1004c7ee0 <+12>: movq?? %rax, %rdi
  ??? 0x1004c7ee3 <+15>: jmp??? 0x1004c6408?????????????? ; cerror_nocancel
  ??? 0x1004c7ee8 <+20>: retq
Target 0: (R) stopped.

I can start it from the /Users/murdoch/R/R-devel/lib directory where
libRblas.dylib lives.? Setting DYLD_LIBRARY_PATH or LD_LIBRARY_PATH to
point there doesn't help (either on the bin/R command line or exported).
  ?Is there some other way to run it from whatever directory I happen to
be in?

Duncan Murdoch

On 02/05/2020 11:26 p.m., Simon Urbanek wrote:

Vince,

Apple no longer allows debugging of distributed apps - see R for Mac
FAQ 10.17:
http://mac.r-project.org/bin/macosx/RMacOSX-FAQ.html#I-cannot-attach-debugger-to-R


Another (not recommended) work-around is to disable SIP.

Cheers,
Simon

On 3/05/2020, at 10:42 AM, Vincent Carey <stvjc at channing.harvard.edu>
wrote:

I'd like to make use of material in

https://kevinushey.github.io/blog/2015/04/13/debugging-with-lldb/

But with R 4.0 I get

%vjcair> R -d lldb

(lldb) target create
"/Library/Frameworks/R.framework/Resources/bin/exec/R"

Current executable set to
'/Library/Frameworks/R.framework/Resources/bin/exec/R' (x86_64).

(lldb) run

error: process exited with status -1 (Error 1)

(lldb) quit

%vjcair> which lldb

/usr/bin/lldb

%vjcair> lldb --version

lldb-1100.0.30.12

Apple Swift version 5.1.3 (swiftlang-1100.0.282.1 clang-1100.0.33.15)


with gdb, there is a little more info -- and a peculiar warning that
mentions /Volumes/Builds/Simon/R4/h ...


%vjcair> R -d gdb

GNU gdb (GDB) 8.1

Copyright (C) 2018 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 "x86_64-apple-darwin16.7.0".

Type "show configuration" for configuration details.

For bug reporting instructions, please see:

<http://www.gnu.org/software/gdb/bugs/>.

Find the GDB manual and other documentation resources online at:

<http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".

Type "apropos word" to search for commands related to "word"...

Reading symbols from
/Library/Frameworks/R.framework/Resources/bin/exec/R...

warning:
`/Volumes/Builds/Simon/R4/high-sierra-x86_64/R-4.0-branch/src/main/Rmain.o':

can't open to read symbols: No such file or directory.

(no debugging symbols found)...done.

(gdb) run

Starting program:
/Library/Frameworks/R.framework/Versions/4.0/Resources/bin/exec/R

Unable to find Mach task port for process-id 59032: (os/kern) failure
(0x5).

(please check gdb is codesigned - see taskgated(8))

sessionInfo()

R version 4.0.0 Patched (2020-04-27 r78309)

Platform: x86_64-apple-darwin17.0 (64-bit)

Running under: macOS Mojave 10.14.6


Matrix products: default

BLAS:
/Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRblas.dylib


LAPACK:
/Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRlapack.dylib


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