Date: Mon, 18 Sep 2017 14:41:06 +0300 From: Vladimir Zakharov <zakharov.vv@gmail.com> To: freebsd-current@freebsd.org Subject: lldb unusable for regular user Message-ID: <20170918114106.jkmpcde6tmvhizhj@vzakharov>
next in thread | raw e-mail | index | archive | help
Hello! lldb coredumps for regular user, but works for root. > uname -a FreeBSD vzakharov 12.0-CURRENT FreeBSD 12.0-CURRENT #0 r323675: Sun Sep 17 21:14:33 MSK 2017 root@vzakharov:/home/obj/usr/src/sys/GENERIC-NODEBUG amd64 > cat test.c #include <stdio.h> #include <unistd.h> int main() { printf("PID: %d\n", getpid()); sleep(10); return 0; } > cc -O0 -g test.c -o test > lldb ./test (lldb) target create "./test" Current executable set to './test' (x86_64). (lldb) run Process 37758 launching Process 37758 launched: './test' (x86_64) Segmentation fault (core dumped) Exit 139 > sudo lldb ./test (lldb) target create "./test" Current executable set to './test' (x86_64). (lldb) run Process 37776 launching Process 37776 launched: './test' (x86_64) PID: 37776 Process 37776 exited with status = 0 (0x00000000) (lldb) Postmortem by gdb: > gdb ./test test.core ... [New LWP 101456] Core was generated by `./test'. Program terminated with signal SIGTRAP, Trace/breakpoint trap. #0 _start (ap=0x7fffffffe858, cleanup=0x800605910 <rtld_exit>) at /usr/src/lib/csu/amd64/crt1.c:50 50 { (gdb) bt #0 _start (ap=0x7fffffffe858, cleanup=0x800605910 <rtld_exit>) at /usr/src/lib/csu/amd64/crt1.c:50 (gdb) f #0 _start (ap=0x7fffffffe858, cleanup=0x800605910 <rtld_exit>) at /usr/src/lib/csu/amd64/crt1.c:50 50 { > gdb `which lldb` lldb.core ... Reading symbols from /usr/bin/lldb...Reading symbols from /usr/lib/debug//usr/bin/lldb.debug...done. done. [New LWP 101610] [New LWP 100968] [New LWP 100126] [New LWP 101631] [New LWP 101637] [New LWP 101662] [New LWP 101672] [New LWP 100337] [New LWP 101593] Core was generated by `lldb ./test'. Program terminated with signal SIGSEGV, Segmentation fault. #0 x86_64_freebsd_fallback_frame_state (context=0x7fffddff6e20, context=0x7fffddff6e20, fs=0x7fffddff6b70) at ./md-unwind-support.h:60 60 ./md-unwind-support.h: No such file or directory. [Current thread is 1 (LWP 101610)] (gdb) f #0 x86_64_freebsd_fallback_frame_state (context=0x7fffddff6e20, context=0x7fffddff6e20, fs=0x7fffddff6b70) at ./md-unwind-support.h:60 60 in ./md-unwind-support.h (gdb) bt #0 x86_64_freebsd_fallback_frame_state (context=0x7fffddff6e20, context=0x7fffddff6e20, fs=0x7fffddff6b70) at ./md-unwind-support.h:60 #1 uw_frame_state_for (context=context@entry=0x7fffddff6e20, fs=fs@entry=0x7fffddff6b70) at /wrkdirs/usr/ports/lang/gcc6/work/gcc-6.4.0/libgcc/unwind-dw2.c:1249 #2 0x0000000804f6cffb in _Unwind_ForcedUnwind_Phase2 (exc=exc@entry=0x806b23230, context=context@entry=0x7fffddff6e20) at /wrkdirs/usr/ports/lang/gcc6/work/gcc-6.4.0/libgcc/unwind.inc:155 #3 0x0000000804f6d334 in _Unwind_ForcedUnwind (exc=0x806b23230, stop=0x804631760 <thread_unwind_stop>, stop_argument=<optimized out>) at /wrkdirs/usr/ports/lang/gcc6/work/gcc-6.4.0/libgcc/unwind.inc:207 #4 0x00000008046315c3 in _Unwind_ForcedUnwind (ex=<optimized out>, stop_func=0xe, stop_arg=0x806b23000) at /usr/src/lib/libthr/thread/thr_exit.c:106 #5 thread_unwind () at /usr/src/lib/libthr/thread/thr_exit.c:172 #6 _pthread_exit_mask (status=<optimized out>, mask=<optimized out>) at /usr/src/lib/libthr/thread/thr_exit.c:254 #7 0x00000008046313eb in _pthread_exit (status=0x806b23000) at /usr/src/lib/libthr/thread/thr_exit.c:206 #8 0x0000000804623c0d in thread_start (curthread=0x806b23000) at /usr/src/lib/libthr/thread/thr_create.c:289 #9 0x00007fffdddf7000 in ?? () Backtrace stopped: Cannot access memory at address 0x7fffddff7000 -- Regards, | "In theory there is no difference between theory Vladimir Zakharov | and practice. In practice there is."- Yogi Berra
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20170918114106.jkmpcde6tmvhizhj>