Merge branch 'jgfouca/cime/core_file_support' into master (PR #1353)

Add better support for core files

Use python resource library, similar to ulimit for bash, to
try to remove any size limits on core files.

Fixes #1308

[BFB]

* jgfouca/cime/core_file_support:
  Add better support for core files

utils/python/CIME/case_run.py

@@ -6,7 +6,7 @@
 from CIME.provenance                import save_prerun_provenance, save_postrun_provenance
 from CIME.preview_namelists         import create_namelists
 
-import shutil, time, sys, os, glob
+import shutil, time, sys, os, glob, resource
 
 logger = logging.getLogger(__name__)
 
@@ -200,6 +200,13 @@ def case_run(case):
            "Please submit your run using the submit script like so:"
            " ./case.submit")
 
+    # If we need to produce core files, we need to try to ensure that the
+    # system will support them
+    try:
+        resource.setrlimit(resource.RLIMIT_CORE, (resource.RLIM_INFINITY, resource.RLIM_INFINITY))
+    except resource.error:
+        pass
+
     data_assimilation = case.get_value("DATA_ASSIMILATION")
     data_assimilation_cycles = case.get_value("DATA_ASSIMILATION_CYCLES")
     data_assimilation_script = case.get_value("DATA_ASSIMILATION_SCRIPT")