Hi
As I am trying to debug startup failures of a thirs party C++-library, I
stumbled about the fact that the /proc/xenomai/registry/ only listed
semaphores and not tasks.
My co-workers would appreciate to have some equivalents to vxWorks "i"
or "semShow" routines, as they come often very handy to debug problems, I was
thinking about how to improve the situation.
One approach could be:
a) Instead of calling semShow for each semaphore
do "cat /proc/xenomai/registry/semaphores/*". The information therein is
already useful. The attached patch only modifies the output to include the
name of the semaphore. In the future it would be nice to show also the owner
of a mutex.
b) The "i" procedure of vxworks could be replaced
by "cat /proc/xenomai/registry/tasks/*".
With the attached patch I just show the name of the task.
If nobody opposes I would like to extend the interface to provide at least the
same information as under vxWorks (entrypoint, priority, status, program
counter, errno, delay).
Would it be difficult/desirable to include the amount of free stack space?
Would it be difficult/desirable to include the name of the vxworks semaphores
a vx task is holding? Together with point a) one could easyly detect lock
ups.
Best regards
--
Niklaus Giger
Index: ksrc/skins/vxworks/semLib.c
===================================================================
--- ksrc/skins/vxworks/semLib.c (Revision 1738)
+++ ksrc/skins/vxworks/semLib.c (Arbeitskopie)
@@ -49,7 +49,7 @@
xnlock_get_irqsave(&nklock, s);
- p += sprintf(p, "type=%s:value=%u\n", sem->vtbl->type, sem->count);
+ p += sprintf(p, "%s:type=%s:value=%u\n", sem->name, sem->vtbl->type, sem->count);
if (xnsynch_nsleepers(&sem->synchbase) == 0) {
xnpholder_t *holder;
Index: ksrc/skins/vxworks/taskLib.c
===================================================================
--- ksrc/skins/vxworks/taskLib.c (Revision 1738)
+++ ksrc/skins/vxworks/taskLib.c (Arbeitskopie)
@@ -30,6 +30,56 @@
static void wind_task_delete_hook(xnthread_t *xnthread);
static void wind_task_trampoline(void *cookie);
+#ifdef CONFIG_XENO_EXPORT_REGISTRY
+
+static int task_read_proc(char *page,
+ char **start,
+ off_t off, int count, int *eof, void *data)
+{
+ wind_task_t *task = (wind_task_t *)data;
+ char *p = page;
+ int len;
+ spl_t s;
+
+ xnlock_get_irqsave(&nklock, s); /* TODO is this necessary ?? */
+
+ p += sprintf(p, "%s:\n", task->name);
+
+ xnlock_put_irqrestore(&nklock, s);
+
+ len = (p - page) - off;
+ if (len <= off + count)
+ *eof = 1;
+ *start = page + off;
+ if (len > count)
+ len = count;
+ if (len < 0)
+ len = 0;
+
+ return len;
+}
+
+extern xnptree_t __vxworks_ptree;
+
+static xnpnode_t task_pnode = {
+
+ .dir = NULL,
+ .type = "tasks",
+ .entries = 0,
+ .read_proc = &task_read_proc,
+ .write_proc = NULL,
+ .root = &__vxworks_ptree,
+};
+
+#elif defined(CONFIG_XENO_OPT_REGISTRY)
+
+static xnpnode_t task_pnode = {
+
+ .type = "tasks"
+};
+
+#endif /* CONFIG_XENO_EXPORT_REGISTRY */
+
void wind_task_init(void)
{
initq(&wind_tasks_q);
@@ -152,7 +202,7 @@
#ifdef CONFIG_XENO_OPT_REGISTRY
if (xnregistry_enter(pTcb->name,
- pTcb, &xnthread_handle(&pTcb->threadbase), NULL)) {
+ pTcb, &xnthread_handle(&pTcb->threadbase), &task_pnode)) {
wind_errnoset(S_objLib_OBJ_ID_ERROR);
taskDeleteForce((TASK_ID) pTcb);
return ERROR;
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