runtime: avoid potential hang in TestGdbAutotmpTypes
If a GC related task preempts between hitting the main.main breakpoint
and stepping, the test program may halt forever waiting on a GC
operation. This happens if gdb is configured to halt other threads
while executing a step.
Configure gdb to continue running all threads during a step by
setting the scheduler-locking option to off.
Fixes #49852
Change-Id: Iacc9732cbd23526bde0a295e6fa8a0d90f733f59
Reviewed-on: https://go-review.googlesource.com/c/go/+/370775 Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Paul Murphy <murp@ibm.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: Cherry Mui <cherryyz@google.com>