[Crash-utility] [PATCH v2 1/3] Update gdb to 10.1

[HAGIO KAZUHITO(萩尾 一仁)]

Hi Alexey,

Thank you for the huge work!  and sorry for the delayed response.

Apparently updating gdb had been done only when kernel required it,
but these days gdb-7.6 has some problems and is old enough, this
update can make crash more useful and future proof.

I need more time to finish reviewing the patches, but there are
a few lacks of output from my test.  Is it possible to fix the
following?

--- crash-master.log
+++ crash-gdb-10.1.log

* 'bt' command often emits reduced output:

@@ -3391,13 +2885,6 @@
 PID: 951    TASK: ffff880079489fa0  CPU: 0   COMMAND: "sshd"
  #0 [ffff88007997b888] __schedule at ffffffff816a8f45
  #1 [ffff88007997b8f0] schedule at ffffffff816a94c9
- #2 [ffff88007997b900] schedule_hrtimeout_range_clock at ffffffff816a86dd
- #3 [ffff88007997b998] schedule_hrtimeout_range at ffffffff816a8713
- #4 [ffff88007997b9a8] poll_schedule_timeout at ffffffff81215eb5
- #5 [ffff88007997b9d8] do_select at ffffffff81216831
- #6 [ffff88007997bd80] core_sys_select at ffffffff81216afb
- #7 [ffff88007997bf18] sys_select at ffffffff81216cda
- #8 [ffff88007997bf80] system_call_fastpath at ffffffff816b4fc9
     RIP: 00007f04a6bd4783  RSP: 00007fffd1652898  RFLAGS: 00000246
     RAX: 0000000000000017  RBX: ffffffff816b4fc9  RCX: ffffffffffffffff
     RDX: 0000000000000000  RSI: 000055d9679059d0  RDI: 0000000000000007

* lack of information about struct members:

@@ -23937,666 +22908,538 @@
 crash> task
 PID: 11077  TASK: ffff88005fd59fa0  CPU: 1   COMMAND: "bash"
 struct task_struct {
-  state = 0, 
-  stack = 0xffff880062ab0000, 
+  state = 0,
+  stack = ,  <<--
   usage = {
     counter = 2
...
   vtime_seqlock = {
     seqcount = {
       sequence = 0
-    }, 
+    },
     lock = {
-      {
-        rlock = {
-          raw_lock = {
-            val = {
-              counter = 0
-            }
-          }
-        }
-      }
+      {...}   <<-- Can we unshorten this abbreviation? (unionprint?)
     }


> -#WARNING_OPTIONS=-Wall -O2 -Wstrict-prototypes -Wmissing-prototypes -fstack-protector -Wformat-security
> +WARNING_OPTIONS=-Wall -O2 -Wstrict-prototypes -Wmissing-prototypes -fstack-protector -Wformat-security

Please don't change the default options in this patch.

Thanks,
Kazu