mtr: extend gdb backtace info

bt full - to include args and locals. set print sevenbit on - it is more useful to be able to see the exact bytes (in case something is dumped as a string and not hexadecimal digits) set print static-members off - there are many interesting (non-const) static members set frame-arguments all - even non-printables are useful to see. Let's make our bb logs give a little bit more detail on those hard to reproduce bugs. Tests on rhel7's gdb-7.6.1-120.el7

Author: grooverdan

mysql-test/lib/My/CoreDump.pm

@@ -78,7 +78,10 @@ sub _gdb {
  my ($tmp, $tmp_name) = tempfile();
  print $tmp
  "bt\n",
- "thread apply all bt\n",
+ "set print sevenbit on\n",
+ "set print static-members off\n",
+ "set print frame-arguments all\n",
+ "thread apply all bt full\n",
  "quit\n";
  close $tmp or die "Error closing $tmp_name: $!";