gpu: nvgpu: posix: Multithreading for unit tests

Add a -j argument to enable running unit tests on several
threads. Also adds signal handling to prevent a fatal
error in one thread from killing the whole unit test
framework.

JIRA NVGPU-1043

Change-Id: I891a547640cd005a50ffa5c06367ed46c54de012
Signed-off-by: Nicolas Benech <nbenech@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1847740
Reviewed-by: svc-misra-checker <svc-misra-checker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 20 insertions, 6 deletions

diff --git a/userspace/src/results.c b/userspace/src/results.c
index ae077b82..4c30c4db 100644
--- a/userspace/src/results.c
+++ b/userspace/src/results.c
@@ -22,12 +22,18 @@
 
 #include <stdlib.h>
 #include <string.h>
+#include <pthread.h>
 
 #include <unit/io.h>
 #include <unit/core.h>
 #include <unit/unit.h>
 #include <unit/results.h>
 
+/*
+ * Mutex to ensure core_add_test_record() is thread safe.
+ */
+pthread_mutex_t mutex_results = PTHREAD_MUTEX_INITIALIZER;
+
 static int __init_results(struct unit_fw *fw)
 {
         struct unit_results *results;
@@ -72,16 +78,22 @@ int core_add_test_record(struct unit_fw *fw,
                          bool success)
 {
         struct unit_test_record *tr;
+        int err = 0;
 
+        pthread_mutex_lock(&mutex_results);
         /*
-         * Dones nothing if results are already inited.
+         * Does nothing if results are already inited.
          */
-        if (__init_results(fw) != 0)
-                return -1;
+        if (__init_results(fw) != 0) {
+                err = -1;
+                goto done;
+        }
 
         tr = malloc(sizeof(*tr));
-        if (tr == NULL)
-                return -1;
+        if (tr == NULL) {
+                err = -1;
+                goto done;
+        }
 
         tr->mod = mod;
         tr->test = test;
@@ -97,7 +109,9 @@ int core_add_test_record(struct unit_fw *fw,
         if (success)
                 fw->results->nr_passing += 1;
 
-        return 0;
+done:
+        pthread_mutex_unlock(&mutex_results);
+        return err;
 }
 
 void core_print_test_status(struct unit_fw *fw)