mjhjmtu

lldb-3.9 hangs when I try to open a dump from a dotnet application. The process gets completely stuck, without consuming CPU.

$ gdb -v
GNU gdb (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git

$ lldb-3.9 -v
lldb version 3.9.1 ( revision )

$ dotnet --version
2.1.403

$ sudo gcore 27247
[New LWP 27248]
[New LWP 27249]
[New LWP 27250]
[New LWP 27251]
[New LWP 27252]
[New LWP 27253]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f6c157d8ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7ffff444dcd0, expected=0, futex_word=0x1cb3468) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
142 ../sysdeps/unix/sysv/linux/futex-internal.h: No such file or directory.
warning: target file /proc/27247/cmdline contained unexpected null characters
Saved corefile core.27247

$ ll core.27247 
-rw-r--r-- 1 root root 2571743080 oct 20 19:17 core.27247

$ sudo lldb-3.9 `which dotnet` -c core.27247 -d
(lldb) target create "/usr/bin/dotnet" --core "core.27247"

The prompt never gets to (lldb) ever again. I do not even have the chance to load SOS plugin.

The application is just a infinite loop that prints "Hello world" and sleeps for one second before looping again.