test: run pmap on stub process after it starts

This will be a debugging aid to root cause some intermittent
test failures seen due to ASLR in the test pool.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I23a856ab53bdf378b5da51f1cb8d9f2cdf6efce1

Reviewed-on: https://review.gerrithub.io/407842
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>

test/common/autotest_common.sh

@@ -339,6 +339,8 @@ function start_stub() {
 	while ! [ -e /var/run/spdk_stub0 ]; do
 		sleep 1s
 	done
+	# dump process memory map contents to help debug random ASLR failures
+	pmap -pX $stubpid
 	echo done.
 }