add test that checks that RT class is not inherited across fork

1 files changed, 41 insertions, 1 deletions

diff --git a/tests/core_api.c b/tests/core_api.c
index d858f1f..a4d54f5 100644
--- a/tests/core_api.c
+++ b/tests/core_api.c
@@ -1,5 +1,8 @@
-#include "tests.h"
+#include <sys/wait.h> /* for waitpid() */
+#include <unistd.h>
+#include <stdio.h>
 
+#include "tests.h"
 #include "litmus.h"
 
 
@@ -49,3 +52,40 @@ TESTCASE(job_control_non_rt, ALL,
 
         SYSCALL_FAILS( EPERM, get_job_no(&job_no) );
 }
+
+
+TESTCASE(rt_fork_non_rt, C_EDF | GSN_EDF | PSN_EDF | PFAIR,
+         "children of RT tasks are not automatically RT tasks")
+{
+        unsigned int pid, job_no;
+        int status;
+
+        SYSCALL( sporadic_partitioned(10, 100, 0) );
+        SYSCALL( task_mode(LITMUS_RT_TASK) );
+
+        pid = fork();
+
+        ASSERT( pid != -1 );
+
+        if (pid == 0) {
+                /* child */
+
+                SYSCALL_FAILS( EINVAL, sleep_next_period() );
+                SYSCALL_FAILS( EINVAL, wait_for_job_release(0) );
+                SYSCALL_FAILS( EPERM, get_job_no(&job_no) );
+
+                exit(0);
+        } else {
+                /* parent */
+
+                SYSCALL( sleep_next_period() );
+                SYSCALL( wait_for_job_release(20) );
+                SYSCALL( get_job_no(&job_no) );
+
+                SYSCALL( task_mode(BACKGROUND_TASK) );
+
+                SYSCALL( waitpid(pid, &status, 0) );
+
+                ASSERT(WEXITSTATUS(status) == 0);
+        }
+}