Re: Segfault: latest Path and Utilities issues

[Riccardo Mottola]

Hi,

right now I am trying on OpenBSD + GCC

The configure log says:
configure:10309: checking use of fake-main definition
configure:10353: result: yes



Richard Frith-Macdonald wrote:
> Or even, as a first step, look at a full stack dump to see how/where the code 
> is coming from (eg that might tell you if some method is being executed before 
> main())

I tried putting a breakpoint in NSPorcessInfo.m line 912 to catch the 
printout. According to the ifdef's it woul dbe the "fake main" defined 
string.

I get this however:
Breakpoint 2, +[NSProcessInfo initialize] (self=0x25e71c80, _cmd=0x25ea1448)
    at NSProcessInfo.m:949
949     {
Current language:  auto; currently minimal
(gdb) bt
#0  +[NSProcessInfo initialize] (self=0x25e71c80, _cmd=0x25ea1448)
    at NSProcessInfo.m:949
#1  0x07b776cd in __objc_send_initialize (class=0x25e71c80)
    at /usr/obj/ports/gcc-4.9.3/gcc-4.9.3/libobjc/sendmsg.c:524
Segmentation fault (core dumped)


Nice! GDB itself crashed :)

I tried putting a breakpoint in line 965 (gnustep_base_user_main) and I 
don't get there.

If I put a breakpoint in 999 though, I get there:
#0  main (argc=1, argv=0xcf7d3314, env=0xcf7d331c) at NSProcessInfo.m:999
#1  0x1a6ee018 in _start () from /System/Tools/plparse
#2  0x00000001 in ?? ()
#3  0xcf7d3314 in ?? ()
#4  0xcf7d331c in ?? ()
#5  0x00000020 in ?? ()
#6  0x0000000b in ?? ()
#7  0x00001000 in ?? ()
#8  0x1a6edf9b in _start () from /System/Tools/plparse
#9  0x2aaa807c in ?? () from /usr/libexec/ld.so
#10 0xcf7d3310 in ?? ()
#11 0xcf7d32cc in ?? ()
#12 0x00000000 in ?? ()

And the next step is in line 239, which is apparently correct ?


It appears then to die in line 240, where an NSAutoreleasePool is alloc'd.

I recompiled with debug symbols and put a breakpoint in line 240:
(gdb) bt
#0  _gnu_process_args (argc=1, argv=0xcf7e1c74, env=0xcf7e1c7c)
    at NSProcessInfo.m:240
#1  0x02ab253d in main (argc=1, argv=0xcf7e1c74, env=0xcf7e1c7c)
    at NSProcessInfo.m:999
#2  0x15a7d058 in _start () from /System/Tools/plparse
#3  0x00000001 in ?? ()
#4  0xcf7e1c74 in ?? ()
#5  0xcf7e1c7c in ?? ()
#6  0x00000020 in ?? ()
#7  0x0000000b in ?? ()
#8  0x00001000 in ?? ()
#9  0x15a7cfdb in _start () from /System/Tools/plparse
#10 0x2ca3107c in ?? () from /usr/libexec/ld.so
#11 0xcf7e1c70 in ?? ()
#12 0xcf7e1c2c in ?? ()
#13 0x00000000 in ?? ()

"stepping" rough is not of much use:
448     in /usr/obj/ports/gcc-4.9.3/gcc-4.9.3/libobjc/sendmsg.c
(gdb)
176     sarray.h: No such file or directory.
        in sarray.h
(gdb)
448     /usr/obj/ports/gcc-4.9.3/gcc-4.9.3/libobjc/sendmsg.c: No such 
file or directory.
        in /usr/obj/ports/gcc-4.9.3/gcc-4.9.3/libobjc/sendmsg.c
(gdb)
176     sarray.h: No such file or directory.
        in sarray.h
(gdb)
237     in sarray.h
(gdb)

Segmentation fault (core dumped)


Is this sparse information of use?


Riccardo