On Sun, Jan 19, 2014 at 1:53 PM, Davor Cubranic <cubra...@stat.ubc.ca>wrote:
> On Jan 17, 2014, at 6:17 AM, Gábor Csárdi <csardi.ga...@gmail.com> wrote:
>
> > Small note: if you are using a recent version of OSX, then gdb is
> > essentially useless, but you can use llvm, which is nicer in many
> respects,
> > anyway.
>
>
> What do you mean by this? Gdb is a debugger, and LLVM is a compiler
> infrastructure. Perhaps you mean lldb?
>
Yes, I meant lldb, sorry.
> Why do you say gdb is useless anyways? I havent seen any problems with it
> on Mavericks.
>
Depends what compiler you use, I guess. On a CRAN version of R, this is
what I get with gdb, after just pressing CTRL+C:
Program received signal SIGINT, Interrupt.
0x00007fff8fc449aa in ?? ()
(gdb) bt
#0 0x00007fff8fc449aa in ?? ()
#1 0x0000000100178bcf in ?? ()
#2 0x0000040000000400 in ?? ()
#3 0x0000000079fa5350 in ?? ()
#4 0x0000000100178800 in ?? ()
#5 0x00007fff79fa57a8 in ?? ()
#6 0x0000000000000000 in ?? ()
(gdb)
which is not very useful. This is what I get with lldb:
Process 52794 stopped
* thread #1: tid = 0x2c0802, 0x00007fff8fc449aa
libsystem_kernel.dylib`select$DARWIN_EXTSN + 10, queue =
'com.apple.main-thread, stop reason = signal SIGSTOP
frame #0: 0x00007fff8fc449aa libsystem_kernel.dylib`select$DARWIN_EXTSN
+ 10
libsystem_kernel.dylib`select$DARWIN_EXTSN + 10:
-> 0x7fff8fc449aa: jae 0x7fff8fc449b4 ; select$DARWIN_EXTSN
+ 20
0x7fff8fc449ac: movq %rax, %rdi
0x7fff8fc449af: jmpq 0x7fff8fc4119a ; cerror
0x7fff8fc449b4: ret
(lldb) bt
* thread #1: tid = 0x2c0802, 0x00007fff8fc449aa
libsystem_kernel.dylib`select$DARWIN_EXTSN + 10, queue =
'com.apple.main-thread, stop reason = signal SIGSTOP
frame #0: 0x00007fff8fc449aa libsystem_kernel.dylib`select$DARWIN_EXTSN
+ 10
frame #1: 0x0000000100178bcf libR.dylib`R_SelectEx(n=1,
readfds=0x0000000100316bc0, writefds=0x0000000000000000,
exceptfds=0x0000000000000000, timeout=<unavailable>, intr=<unavailable>) +
207 at sys-std.c:154
frame #2: 0x000000010017960b libR.dylib`Rstd_ReadConsole [inlined]
R_checkActivityEx(ignore_stdin=0) + 266 at sys-std.c:331
frame #3: 0x0000000100179501
libR.dylib`Rstd_ReadConsole(prompt=0x00007fff79fa57a8,
buf=0x00007fff5fbfe910, len=1606412560, addtohistory=<unavailable>) + 1825
at sys-std.c:920
frame #4: 0x00000001000c4d19
libR.dylib`Rf_ReplIteration(rho=0x00000001008549f8, savestack=1606412624,
browselevel=0, state=<unavailable>) + 185 at main.c:209
frame #5: 0x00000001000c5643 libR.dylib`run_Rmainloop [inlined]
R_ReplConsole(browselevel=0, savestack=0, rho=0x00000001008549f8) + 116 at
main.c:307
frame #6: 0x00000001000c55cf libR.dylib`run_Rmainloop + 79 at main.c:984
frame #7: 0x0000000100000e5b R`main + 27
frame #8: 0x0000000100000e34 R`start + 52
(lldb)
I admit, "useless" was an overreaction, and maybe you can fix gdb somehow.
I just did not spend any time on trying to fix it.
Gabor
>
> Davor
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