Fix nasa#437, add new API for obtaining exception task ID

Deprecate the OStask_ID field within the property structure.

Replace with a new API to perform a task ID reverse-lookup
based on an abstract data object (the system task ID).

src/os/inc/osapi-os-core.h

@@ -74,7 +74,9 @@ typedef struct
     uint32 creator;
     uint32 stack_size;
     uint32 priority;
-    uint32 OStask_id;
+#ifndef OSAL_OMIT_DEPRECATED
+    uint32 OStask_id;   /**< @deprecated */
+#endif
 }OS_task_prop_t;
 
 /** @brief OSAL queue properties */
@@ -480,6 +482,29 @@ int32 OS_TaskGetIdByName       (uint32 *task_id, const char *task_name);
  * @retval #OS_INVALID_POINTER if the task_prop pointer is NULL
  */
 int32 OS_TaskGetInfo           (uint32 task_id, OS_task_prop_t *task_prop);          
+
+
+/*-------------------------------------------------------------------------------------*/
+/**
+ * @brief Reverse-lookup the OSAL task ID from an operating system ID
+ *
+ * This provides a method by which an external entity may find the OSAL task
+ * ID corresponding to a system-defined identifier (e.g. TASK_ID, pthread_t, rtems_id, etc).
+ *
+ * Normally OSAL does not expose the underlying OS-specific values to the application,
+ * but in some circumstances, such as exception handling, the OS may provide this information
+ * directly to handler outside of the normal OSAL API.
+ *
+ * @param[out]  task_id         The buffer where the task id output is stored
+ * @param[in]   sysdata         Pointer to the system-provided identification data
+ * @param[in]   sysdata_size    Size of the system-provided identification data
+ *
+ * @return Execution status, see @ref OSReturnCodes
+ * @retval #OS_SUCCESS @copybrief OS_SUCCESS
+ */
+int32 OS_TaskFindIdBySystemData(uint32 *task_id, const void *sysdata, size_t sysdata_size);
+
+
 /**@}*/
 
 /** @defgroup OSAPIMsgQueue OSAL Message Queue APIs

src/os/posix/src/os-impl-tasks.c

@@ -761,7 +761,8 @@ uint32 OS_TaskGetId_Impl (void)
  *-----------------------------------------------------------------*/
 int32 OS_TaskGetInfo_Impl (uint32 task_id, OS_task_prop_t *task_prop)
 {
-   size_t copy_sz;
+#ifndef OSAL_OMIT_DEPRECATED
+    size_t copy_sz;
 
    /*
     * NOTE - this is not really valid, as you can't officially
@@ -783,7 +784,43 @@ int32 OS_TaskGetInfo_Impl (uint32 task_id, OS_task_prop_t *task_prop)
    }
 
    memcpy(&task_prop->OStask_id, &OS_impl_task_table[task_id].id, copy_sz);
+#endif
 
    return OS_SUCCESS;
 } /* end OS_TaskGetInfo_Impl */
 
+
+/*----------------------------------------------------------------
+ *
+ * Function: OS_TaskIdMatchSystemData_Impl
+ *
+ *  Purpose: Implemented per internal OSAL API
+ *           See prototype for argument/return detail
+ *
+ *-----------------------------------------------------------------*/
+bool OS_TaskIdMatchSystemData_Impl(void *ref, uint32 local_id, const OS_common_record_t *obj)
+{
+    const pthread_t *target = (const pthread_t *)ref;
+
+    return (pthread_equal(*target, OS_impl_task_table[local_id].id) != 0);
+}
+
+/*----------------------------------------------------------------
+ *
+ * Function: OS_TaskValidateSystemData_Impl
+ *
+ *  Purpose: Implemented per internal OSAL API
+ *           See prototype for argument/return detail
+ *
+ *-----------------------------------------------------------------*/
+int32 OS_TaskValidateSystemData_Impl(const void *sysdata, uint32 sysdata_size)
+{
+    if (sysdata == NULL || sysdata_size != sizeof(pthread_t))
+    {
+        return OS_INVALID_POINTER;
+    }
+    return OS_SUCCESS;
+}
+
+
+

src/os/rtems/src/os-impl-tasks.c

@@ -328,9 +328,42 @@ uint32 OS_TaskGetId_Impl (void)
  *-----------------------------------------------------------------*/
 int32 OS_TaskGetInfo_Impl (uint32 task_id, OS_task_prop_t *task_prop)
 {
+#ifndef OSAL_OMIT_DEPRECATED
     task_prop->OStask_id =  (uint32) OS_impl_task_table[task_id].id;
+#endif
     return OS_SUCCESS;
 
 } /* end OS_TaskGetInfo_Impl */
 
+/*----------------------------------------------------------------
+ *
+ * Function: OS_TaskValidateSystemData_Impl
+ *
+ *  Purpose: Implemented per internal OSAL API
+ *           See prototype for argument/return detail
+ *
+ *-----------------------------------------------------------------*/
+int32 OS_TaskValidateSystemData_Impl(const void *sysdata, uint32 sysdata_size)
+{
+    if (sysdata == NULL || sysdata_size != sizeof(rtems_id))
+    {
+        return OS_INVALID_POINTER;
+    }
+    return OS_SUCCESS;
+}
+
+/*----------------------------------------------------------------
+ *
+ * Function: OS_TaskIdMatchSystemData_Impl
+ *
+ *  Purpose: Implemented per internal OSAL API
+ *           See prototype for argument/return detail
+ *
+ *-----------------------------------------------------------------*/
+bool OS_TaskIdMatchSystemData_Impl(void *ref, uint32 local_id, const OS_common_record_t *obj)
+{
+    const rtems_id *target = (const rtems_id *)ref;
+
+    return (*target == OS_impl_task_table[local_id].id);
+}
 

src/os/shared/inc/os-shared-task.h

@@ -158,5 +158,26 @@ int32  OS_TaskGetInfo_Impl           (uint32 task_id, OS_task_prop_t *task_prop)
 int32  OS_TaskRegister_Impl          (uint32 global_task_id);
 
 
+/*----------------------------------------------------------------
+
+   Function: OS_TaskIdMatchSystemData_Impl
+
+    Purpose: A helper "match" function to find an OSAL task ID based on system ID
+             Compatible with the "OS_ObjectIdFindBySearch" routine
+
+ ------------------------------------------------------------------*/
+bool OS_TaskIdMatchSystemData_Impl(void *ref, uint32 local_id, const OS_common_record_t *obj);
+
+/*----------------------------------------------------------------
+
+   Function: OS_TaskValidateSystemData_Impl
+
+    Purpose: Checks that the supplied sysdata pointer and sysdata_size are
+             compatible/reasonable for the underlying OS.
+
+ ------------------------------------------------------------------*/
+int32 OS_TaskValidateSystemData_Impl(const void *sysdata, uint32 sysdata_size);
+
+
 #endif  /* INCLUDE_OS_SHARED_TASK_H_ */
 

src/os/shared/src/osapi-task.c

@@ -512,3 +512,41 @@ int32 OS_TaskInstallDeleteHandler(osal_task_entry function_pointer)
 
    return return_code;
 } /* end OS_TaskInstallDeleteHandler */
+
+/*----------------------------------------------------------------
+ *
+ * Function: OS_TaskFindIdBySystemData
+ *
+ *  Purpose: Implemented per public OSAL API
+ *           See description in API and header file for detail
+ *
+ *-----------------------------------------------------------------*/
+int32 OS_TaskFindIdBySystemData(uint32 *task_id, const void *sysdata, size_t sysdata_size)
+{
+    int32 return_code;
+    OS_common_record_t *record;
+
+    /* Check parameters */
+    if (task_id == NULL)
+    {
+       return OS_INVALID_POINTER;
+    }
+
+    /* The "sysdata" and "sysdata_size" must be passed to the underlying impl for validation */
+    return_code = OS_TaskValidateSystemData_Impl(sysdata, sysdata_size);
+    if (return_code != OS_SUCCESS)
+    {
+        return return_code;
+    }
+
+    return_code = OS_ObjectIdGetBySearch(OS_LOCK_MODE_GLOBAL, LOCAL_OBJID_TYPE, OS_TaskIdMatchSystemData_Impl, (void*)sysdata, &record);
+    if (return_code == OS_SUCCESS)
+    {
+        *task_id = record->active_id;
+        OS_Unlock_Global_Impl(LOCAL_OBJID_TYPE);
+    }
+
+    return return_code;
+} /* end OS_TaskFindIdBySystemData */
+
+

src/os/vxworks/src/os-impl-tasks.c

@@ -420,6 +420,7 @@ uint32 OS_TaskGetId_Impl (void)
  *-----------------------------------------------------------------*/
 int32 OS_TaskGetInfo_Impl (uint32 task_id, OS_task_prop_t *task_prop)
 {
+#ifndef OSAL_OMIT_DEPRECATED
     union
     {
         TASK_ID vxid;
@@ -434,8 +435,43 @@ int32 OS_TaskGetInfo_Impl (uint32 task_id, OS_task_prop_t *task_prop)
      */
     u.vxid = OS_impl_task_table[task_id].vxid;
     task_prop->OStask_id = u.value;
+#endif
 
     return OS_SUCCESS;
 
 } /* end OS_TaskGetInfo_Impl */
 
+/*----------------------------------------------------------------
+ *
+ * Function: OS_TaskValidateSystemData_Impl
+ *
+ *  Purpose: Implemented per internal OSAL API
+ *           See prototype for argument/return detail
+ *
+ *-----------------------------------------------------------------*/
+int32 OS_TaskValidateSystemData_Impl(const void *sysdata, uint32 sysdata_size)
+{
+    if (sysdata == NULL || sysdata_size != sizeof(TASK_ID))
+    {
+        return OS_INVALID_POINTER;
+    }
+    return OS_SUCCESS;
+}
+
+/*----------------------------------------------------------------
+ *
+ * Function: OS_TaskIdMatchSystemData_Impl
+ *
+ *  Purpose: Implemented per internal OSAL API
+ *           See prototype for argument/return detail
+ *
+ *-----------------------------------------------------------------*/
+bool OS_TaskIdMatchSystemData_Impl(void *ref, uint32 local_id, const OS_common_record_t *obj)
+{
+    const TASK_ID *target = (const TASK_ID *)ref;
+
+    return (*target == OS_impl_task_table[local_id].vxid);
+}
+
+
+

src/unit-test-coverage/ut-stubs/src/osapi-task-impl-stubs.c

@@ -48,3 +48,10 @@ uint32 OS_TaskGetId_Impl            (void)
 UT_DEFAULT_STUB(OS_TaskGetInfo_Impl,(uint32 task_id, OS_task_prop_t *task_prop))
 UT_DEFAULT_STUB(OS_TaskRegister_Impl,(uint32 global_task_id))
 
+bool OS_TaskIdMatchSystemData_Impl(void *ref, uint32 local_id, const OS_common_record_t *obj)
+{
+    return UT_DEFAULT_IMPL(OS_TaskIdMatchSystemData_Impl);
+}
+
+UT_DEFAULT_STUB(OS_TaskValidateSystemData_Impl,(const void *sysdata, uint32 sysdata_size))
+

src/ut-stubs/osapi-utstub-task.c

@@ -264,7 +264,6 @@ int32 OS_TaskGetInfo(uint32 task_id, OS_task_prop_t *task_prop)
     {
         task_prop->creator = 1;
         UT_FIXUP_ID(task_prop->creator, UT_OBJTYPE_TASK);
-        task_prop->OStask_id = task_id & 0xFFFF;
         task_prop->stack_size = 100;
         task_prop->priority = 150;
         strncpy(task_prop->name, "UnitTest", OS_MAX_API_NAME - 1);