tests: Re-add the ability to generate core files with topotests

Somewhere along the line core-files stopped being generated
with the running of the topotests.  With this change we now
see this:

sharpd@eva /t/topotests> find . -name '*.dmp' -print
./ospfv3_basic_functionality.test_ospfv3_asbr_summary_topo1/r0/ospf6d_core-sig_6-pid_430478.dmp
sharpd@eva /t/topotests> sudo gdb /usr/lib/frr/ospf6d ./ospfv3_basic_functionality.test_ospfv3_asbr_summary_topo1/r0/ospf6d_core-sig_6-pid_430478.dmp
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Reading symbols from /usr/lib/frr/ospf6d...
[New LWP 430478]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/lib/frr/ospf6d --log file:ospf6d.log --log-level debug -d'.
Program terminated with signal SIGABRT, Aborted.
50	../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
(gdb)

Signed-off-by: Donald Sharp <sharpd@nvidia.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/tests/topotests/conftest.py b/tests/topotests/conftest.py
index ce7878c240..3e1e6eb79b 100755
--- a/tests/topotests/conftest.py
+++ b/tests/topotests/conftest.py
@@ -9,6 +9,7 @@ import re
 import subprocess
 import sys
 import time
+import resource
 
 import pytest
 import lib.fixtures
@@ -221,6 +222,9 @@ def pytest_configure(config):
         is_xdist = True
         is_worker = True
 
+    resource.setrlimit(
+        resource.RLIMIT_CORE, (resource.RLIM_INFINITY, resource.RLIM_INFINITY)
+    )
     # -----------------------------------------------------
     # Set some defaults for the pytest.ini [pytest] section
     # ---------------------------------------------------
@@ -505,5 +509,6 @@ def pytest_runtest_makereport(item, call):
 #
 # Add common fixtures available to all tests as parameters
 #
+
 tgen = pytest.fixture(lib.fixtures.tgen)
 topo = pytest.fixture(lib.fixtures.topo)