[dv] Record failure on log processing error

Previous to this change the entire process would die on an issue with
processing a single log. This alters it so this will just add to the
failure count with the error logged and the log processing continued to
its end.

dv/uvm/core_ibex/riscv_dv_extension/ibex_log_to_trace_csv.py

@@ -89,9 +89,12 @@ def process_ibex_sim_log(ibex_log, csv, full_trace=1):
     log and save to a standard CSV format.
     """
     logging.info("Processing ibex log : %s" % ibex_log)
-    with open(ibex_log, "r") as log_fd, open(csv, "w") as csv_fd:
-        count = _process_ibex_sim_log_fd(log_fd, csv_fd,
-                                         True if full_trace else False)
+    try:
+        with open(ibex_log, "r") as log_fd, open(csv, "w") as csv_fd:
+            count = _process_ibex_sim_log_fd(log_fd, csv_fd,
+                                             True if full_trace else False)
+    except FileNotFoundError:
+        raise RuntimeError("Logfile %s not found" % ibex_log)
 
     logging.info("Processed instruction count : %d" % count)
     if not count:

dv/uvm/core_ibex/sim.py

@@ -351,9 +351,14 @@ def compare_test_run(test, idx, iss, output_dir, report):
     rtl_csv = os.path.join(rtl_dir, 'trace_core_00000000.csv')
     uvm_log = os.path.join(rtl_dir, 'sim.log')
 
-    # Convert the RTL log file to a trace CSV. On failure, this will raise an
-    # exception, so we can assume this passed.
-    process_ibex_sim_log(rtl_log, rtl_csv, 1)
+    try:
+        # Convert the RTL log file to a trace CSV.
+        process_ibex_sim_log(rtl_log, rtl_csv, 1)
+    except RuntimeError as e:
+        with open(report, 'a') as report_fd:
+            report_fd.write('Log processing failed: {}\n'.format(e))
+
+        return False
 
     # Have a look at the UVM log. We should write out a message on failure or
     # if we are stopping at this point.