/* ------------------------------------------------------------------------ Copyright Objective Design Systems Pty Ltd, 2002 All rights reserved Objective Design Systems Pty Ltd, 2002 Chris Johns (ccj@acm.org) COPYRIGHT (c) 1989-2009. On-Line Applications Research Corporation (OAR). The license and distribution terms for this file may be found in the file LICENSE in this distribution. This software with is provided ``as is'' and with NO WARRANTY. ------------------------------------------------------------------------ RTEMS Performance Monitoring and Measurement Framework. This is the Capture Engine component. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include "captureimpl.h" #include "capture_buffer.h" #include #include /* * These events are always recorded and are not part of the * watch filters. * * This feature has been disabled as it becomes confusing when * setting up filters and some event leak. */ #if defined (RTEMS_CAPTURE_ENGINE_ALLOW_RELATED_EVENTS) #define RTEMS_CAPTURE_RECORD_EVENTS (RTEMS_CAPTURE_CREATED_BY_EVENT | \ RTEMS_CAPTURE_CREATED_EVENT | \ RTEMS_CAPTURE_STARTED_BY_EVENT | \ RTEMS_CAPTURE_STARTED_EVENT | \ RTEMS_CAPTURE_RESTARTED_BY_EVENT | \ RTEMS_CAPTURE_RESTARTED_EVENT | \ RTEMS_CAPTURE_DELETED_BY_EVENT | \ RTEMS_CAPTURE_DELETED_EVENT | \ RTEMS_CAPTURE_BEGIN_EVENT | \ RTEMS_CAPTURE_EXITTED_EVENT | \ RTEMS_CAPTURE_TERMINATED_EVENT | \ RTEMS_CAPTURE_AUTOGEN_ENTRY_EVENT | \ RTEMS_CAPTURE_AUTOGEN_EXIT_EVENT) #else #define RTEMS_CAPTURE_RECORD_EVENTS (0) #endif /* * RTEMS Capture Data. */ static rtems_capture_buffer_t capture_records = {NULL, 0, 0, 0, 0, 0}; static uint32_t capture_count; static uint32_t capture_flags; static rtems_capture_task_t* capture_tasks; static rtems_capture_control_t* capture_controls; static int capture_extension_index; static rtems_capture_timestamp capture_timestamp; static rtems_task_priority capture_ceiling; static rtems_task_priority capture_floor; static rtems_id capture_reader; static rtems_interrupt_lock capture_lock = RTEMS_INTERRUPT_LOCK_INITIALIZER("capture"); /* * RTEMS Event text. */ static const char* capture_event_text[] = { "CREATED_BY", "CREATED", "STARTED_BY", "STARTED", "RESTARTED_BY", "RESTARTED", "DELETED_BY", "DELETED", "TERMINATED", "BEGIN", "EXITTED", "SWITCHED_OUT", "SWITCHED_IN", "TIMESTAMP" }; void rtems_capture_set_extension_index(int index) { capture_extension_index = index; } int rtems_capture_get_extension_index(void) { return capture_extension_index; } uint32_t rtems_capture_get_flags(void) { return capture_flags; } void rtems_capture_set_flags(uint32_t mask) { capture_flags |= mask; } rtems_capture_task_t* rtems_capture_find_capture_task( rtems_id ct_id ) { rtems_capture_task_t* ct; for (ct = capture_tasks; ct; ct = ct->forw) { if (ct->id == ct_id) break; } return ct; } /* * This function returns the current time. If a handler is provided * by the user get the time from that. */ void rtems_capture_get_time (rtems_capture_time_t* time) { if (capture_timestamp) capture_timestamp (time); else { *time = rtems_clock_get_uptime_nanoseconds (); } } /* * This function compares rtems_names. It protects the * capture engine from a change to the way names are supported * in RTEMS. */ static inline bool rtems_capture_match_names (rtems_name lhs, rtems_name rhs) { return lhs == rhs; } /* * This function compares rtems_ids. It protects the * capture engine from a change to the way id are supported * in RTEMS. */ static inline bool rtems_capture_match_ids (rtems_id lhs, rtems_id rhs) { return lhs == rhs; } /* * This function matches a name and/or id. */ static inline bool rtems_capture_match_name_id (rtems_name lhs_name, rtems_id lhs_id, rtems_name rhs_name, rtems_id rhs_id) { /* * The left hand side name or id could be 0 which means a wildcard. */ if ((lhs_name == 0) && (lhs_id == rhs_id)) return 1; else if ((lhs_id == 0) || (lhs_id == rhs_id)) { if (rtems_capture_match_names (lhs_name, rhs_name)) return 1; } return 0; } /* * This function duplicates an rtems_names. It protects the * capture engine from a change to the way names are supported * in RTEMS. */ static inline void rtems_capture_dup_name (rtems_name* dst, rtems_name src) { *dst = src; } /* * This function sees if a BY control is in the BY names. The use * of the valid_mask in this way assumes the number of trigger * tasks is the number of bits in uint32_t. */ static inline bool rtems_capture_by_in_to (uint32_t events, rtems_capture_task_t* by, rtems_capture_control_t* to) { uint32_t valid_mask = RTEMS_CAPTURE_CONTROL_FROM_MASK (0); uint32_t valid_remainder = 0xffffffff; int i; for (i = 0; i < RTEMS_CAPTURE_TRIGGER_TASKS; i++) { /* * If there are no more valid BY entries then * we are finished. */ if ((valid_remainder & to->by_valid) == 0) break; /* * Is the froby entry valid and does its name or id match. */ if ((valid_mask & to->by_valid) && (to->by[i].trigger & events)) { /* * We have the BY task on the right hand side so we * match with id's first then labels if the id's are * not set. */ if (rtems_capture_match_name_id (to->by[i].name, to->by[i].id, by->name, by->id)) return 1; } valid_mask >>= 1; valid_remainder >>= 1; } return 0; } /* * This function raises the reference count. */ static inline void rtems_capture_refcount_up (rtems_capture_task_t* task) { task->refcount++; } /* * This function lowers the reference count and if the count * reaches 0 the task control block is returned to the heap. */ static inline void rtems_capture_refcount_down (rtems_capture_task_t* task) { if (task->refcount) task->refcount--; } /* * This function setups a stack so its usage can be monitored. */ void rtems_capture_init_stack_usage (rtems_capture_task_t* task) { if (task->tcb) { uint32_t* s; uint32_t i; task->stack_size = task->tcb->Start.Initial_stack.size; task->stack_clean = task->stack_size; s = task->tcb->Start.Initial_stack.area; for (i = 0; i < (task->stack_size - 128); i += 4) *(s++) = 0xdeaddead; } } /* * This function searches for a trigger given a name. */ static inline rtems_capture_control_t* rtems_capture_find_control (rtems_name name, rtems_id id) { rtems_capture_control_t* control; for (control = capture_controls; control != NULL; control = control->next) if (rtems_capture_match_name_id (name, id, control->name, control->id)) break; return control; } /* * This function creates a capture control for the capture engine. */ static inline rtems_capture_control_t* rtems_capture_create_control (rtems_name name, rtems_id id) { rtems_interrupt_lock_context lock_context; rtems_capture_control_t* control; rtems_capture_task_t* task; if ((name == 0) && (id == 0)) return NULL; control = rtems_capture_find_control (name, id); if (control == NULL) { bool ok = rtems_workspace_allocate (sizeof (*control), (void **) &control); if (!ok) { capture_flags |= RTEMS_CAPTURE_NO_MEMORY; return NULL; } control->name = name; control->id = id; control->flags = 0; control->to_triggers = 0; control->from_triggers = 0; control->by_valid = 0; memset (control->by, 0, sizeof (control->by)); rtems_interrupt_lock_acquire (&capture_lock, &lock_context); control->next = capture_controls; capture_controls = control; /* * We need to scan the task list as set the control to the * tasks. */ for (task = capture_tasks; task != NULL; task = task->forw) if (rtems_capture_match_name_id (name, id, task->name, task->id)) task->control = control; rtems_interrupt_lock_release (&capture_lock, &lock_context); } return control; } /* * This function create the task control. */ rtems_capture_task_t* rtems_capture_create_capture_task (rtems_tcb* new_task) { rtems_interrupt_lock_context lock_context; rtems_capture_task_t* task; rtems_capture_control_t* control; rtems_name name; rtems_capture_time_t time; bool ok; ok = rtems_workspace_allocate (sizeof (*task), (void **) &task); if (!ok) { capture_flags |= RTEMS_CAPTURE_NO_MEMORY; return NULL; } /* * Get the current time. */ rtems_capture_get_time (&time); /* * Check the type of name the object has. */ rtems_object_get_classic_name( new_task->Object.id, &name ); rtems_capture_dup_name (&task->name, name); task->id = new_task->Object.id; task->flags = 0; task->in = 0; task->refcount = 0; task->out = 0; task->tcb = new_task; task->time = 0; task->time_in = time; task->control = 0; task->last_time = 0; task->tcb->extensions[capture_extension_index] = task; task->start_priority = _RTEMS_tasks_Priority_from_Core( new_task->Start.initial_priority ); task->stack_size = new_task->Start.Initial_stack.size; task->stack_clean = task->stack_size; rtems_interrupt_lock_acquire (&capture_lock, &lock_context); task->forw = capture_tasks; if (task->forw) task->forw->back = task; task->back = NULL; capture_tasks = task; rtems_interrupt_lock_release (&capture_lock, &lock_context); /* * We need to scan the default control list to initialise * this control. */ for (control = capture_controls; control != NULL; control = control->next) if (rtems_capture_match_name_id (control->name, control->id, task->name, task->id)) task->control = control; return task; } /* * This function destroy the task structure if the reference count * is 0 and the tcb has been cleared signalling the task has been * deleted. */ void rtems_capture_destroy_capture_task (rtems_capture_task_t* task) { if (task) { rtems_interrupt_lock_context lock_context; rtems_interrupt_lock_acquire (&capture_lock, &lock_context); if (task->tcb || task->refcount) task = 0; if (task) { if (task->forw) task->forw->back = task->back; if (task->back) task->back->forw = task->forw; else capture_tasks = task->forw; } rtems_interrupt_lock_release (&capture_lock, &lock_context); rtems_workspace_free (task); } } /* * This function indicates if data should be filtered from the * log. */ bool rtems_capture_filter( rtems_capture_task_t* task, uint32_t events) { if (task && ((capture_flags & (RTEMS_CAPTURE_TRIGGERED | RTEMS_CAPTURE_ONLY_MONITOR)) == RTEMS_CAPTURE_TRIGGERED)) { rtems_capture_control_t* control; control = task->control; /* * Capture the record if we have an event that is always * captured, or the task's real priority is greater than the * watch ceiling, and the global watch or task watch is enabled. */ if ((events & RTEMS_CAPTURE_RECORD_EVENTS) || ((task->tcb->real_priority >= capture_ceiling) && (task->tcb->real_priority <= capture_floor) && ((capture_flags & RTEMS_CAPTURE_GLOBAL_WATCH) || (control && (control->flags & RTEMS_CAPTURE_WATCH))))) { return false; } } return true; } /* * This function records a capture record into the capture buffer. */ void * rtems_capture_record_open (rtems_capture_task_t* task, uint32_t events, size_t size, rtems_interrupt_lock_context* lock_context) { uint8_t* ptr; rtems_capture_record_t* capture_in; rtems_interrupt_lock_acquire (&capture_lock, lock_context); ptr = rtems_capture_buffer_allocate(&capture_records, size); capture_in = (rtems_capture_record_t *) ptr; if ( capture_in ) { capture_count++; capture_in->size = size; capture_in->task = task; capture_in->events = (events | (task->tcb->real_priority) | (task->tcb->current_priority << 8)); if ((events & RTEMS_CAPTURE_RECORD_EVENTS) == 0) task->flags |= RTEMS_CAPTURE_TRACED; rtems_capture_get_time (&capture_in->time); rtems_capture_refcount_up (task); ptr = ptr + sizeof(*capture_in); } else capture_flags |= RTEMS_CAPTURE_OVERFLOW; return ptr; } void rtems_capture_record_close( void *rec, rtems_interrupt_lock_context* lock_context) { rtems_interrupt_lock_release (&capture_lock, lock_context); } /* * See if we have triggered and if not see if this event is a * cause of a trigger. */ bool rtems_capture_trigger (rtems_capture_task_t* ft, rtems_capture_task_t* tt, uint32_t events) { /* * If we have not triggered then see if this is a trigger condition. */ if (!(capture_flags & RTEMS_CAPTURE_TRIGGERED)) { rtems_capture_control_t* fc = NULL; rtems_capture_control_t* tc = NULL; uint32_t from_events = 0; uint32_t to_events = 0; uint32_t from_to_events = 0; if (ft) { fc = ft->control; if (fc) from_events = fc->from_triggers & events; } if (tt) { tc = tt->control; if (tc) { to_events = tc->to_triggers & events; if (ft && tc->by_valid) from_to_events = tc->by_triggers & events; } } /* * Check if we have any from or to events. These are the * from any or to any type triggers. All from/to triggers are * listed in the to's control with the from in the from list. * * The masking above means any flag set is a trigger. */ if (from_events || to_events) { capture_flags |= RTEMS_CAPTURE_TRIGGERED; return 1; } /* * Check the from->to events. */ if (from_to_events) { if (rtems_capture_by_in_to (events, ft, tc)) { capture_flags |= RTEMS_CAPTURE_TRIGGERED; return 1; } } return 0; } return 1; } /* * This function initialises the realtime capture engine allocating the trace * buffer. It is assumed we have a working heap at stage of initialisation. */ rtems_status_code rtems_capture_open (uint32_t size, rtems_capture_timestamp timestamp __attribute__((unused))) { rtems_status_code sc; /* * See if the capture engine is already open. */ if (capture_records.buffer) return RTEMS_RESOURCE_IN_USE; rtems_capture_buffer_create( &capture_records, size ); if (capture_records.buffer == NULL) return RTEMS_NO_MEMORY; capture_count = 0; capture_flags = 0; capture_tasks = NULL; capture_ceiling = 0; capture_floor = 255; sc = rtems_capture_user_extension_open(); if (sc != RTEMS_SUCCESSFUL) { rtems_capture_buffer_destroy( &capture_records); } /* * Iterate over the list of existing tasks. */ return sc; } /* * This function shutdowns the capture engine and release any claimed * resources. */ rtems_status_code rtems_capture_close (void) { rtems_interrupt_lock_context lock_context; rtems_capture_task_t* task; rtems_capture_control_t* control; rtems_status_code sc; rtems_interrupt_lock_acquire (&capture_lock, &lock_context); if (!capture_records.buffer) { rtems_interrupt_lock_release (&capture_lock, &lock_context); return RTEMS_SUCCESSFUL; } capture_flags &= ~(RTEMS_CAPTURE_ON | RTEMS_CAPTURE_ONLY_MONITOR); rtems_interrupt_lock_release (&capture_lock, &lock_context); /* * Delete the extension first. This means we are now able to * release the resources we have without them being used. */ sc = rtems_capture_user_extension_close(); if (sc != RTEMS_SUCCESSFUL) return sc; task = capture_tasks; while (task) { rtems_capture_task_t* delete = task; task = task->forw; rtems_workspace_free (delete); } capture_tasks = NULL; control = capture_controls; while (control) { rtems_capture_control_t* delete = control; control = control->next; rtems_workspace_free (delete); } capture_controls = NULL; if (capture_records.buffer) { rtems_capture_buffer_destroy( &capture_records); } return RTEMS_SUCCESSFUL; } /* * This function allows control of tracing at a global level. */ static void rtems_capture_task_setup (Thread_Control *tcb) { rtems_capture_create_capture_task (tcb); } rtems_status_code rtems_capture_control (bool enable) { rtems_interrupt_lock_context lock_context; rtems_interrupt_lock_acquire (&capture_lock, &lock_context); if (!capture_records.buffer) { rtems_interrupt_lock_release (&capture_lock, &lock_context); return RTEMS_UNSATISFIED; } if (enable) capture_flags |= RTEMS_CAPTURE_ON; else capture_flags &= ~RTEMS_CAPTURE_ON; rtems_iterate_over_all_threads (rtems_capture_task_setup); rtems_interrupt_lock_release (&capture_lock, &lock_context); return RTEMS_SUCCESSFUL; } /* * This function enable the monitor mode. When in the monitor mode * the tasks are monitored but no data is saved. This can be used * to profile the load on a system. */ rtems_status_code rtems_capture_monitor (bool enable) { rtems_interrupt_lock_context lock_context; rtems_interrupt_lock_acquire (&capture_lock, &lock_context); if (!capture_records.buffer) { rtems_interrupt_lock_release (&capture_lock, &lock_context); return RTEMS_UNSATISFIED; } if (enable) capture_flags |= RTEMS_CAPTURE_ONLY_MONITOR; else capture_flags &= ~RTEMS_CAPTURE_ONLY_MONITOR; rtems_interrupt_lock_release (&capture_lock, &lock_context); return RTEMS_SUCCESSFUL; } /* * This function flushes the capture buffer. The prime parameter allows the * capture engine to also be primed again. */ rtems_status_code rtems_capture_flush (bool prime) { rtems_interrupt_lock_context lock_context; rtems_capture_task_t* task; rtems_interrupt_lock_acquire (&capture_lock, &lock_context); for (task = capture_tasks; task != NULL; task = task->forw) { task->flags &= ~RTEMS_CAPTURE_TRACED; task->refcount = 0; } if (prime) capture_flags &= ~(RTEMS_CAPTURE_TRIGGERED | RTEMS_CAPTURE_OVERFLOW); else capture_flags &= ~RTEMS_CAPTURE_OVERFLOW; rtems_capture_buffer_flush( &capture_records ); capture_count = 0; rtems_interrupt_lock_release (&capture_lock, &lock_context); task = capture_tasks; while (task) { rtems_capture_task_t* check = task; task = task->forw; rtems_capture_destroy_capture_task (check); } return RTEMS_SUCCESSFUL; } /* * This function defines a watch for a specific task given a name. A watch * causes it to be traced either in or out of context. The watch can be * optionally enabled or disabled with the set routine. It is disabled by * default. */ rtems_status_code rtems_capture_watch_add (rtems_name name, rtems_id id) { rtems_capture_control_t* control; if ((name == 0) && (id == 0)) return RTEMS_UNSATISFIED; control = rtems_capture_find_control (name, id); if (control && !id) return RTEMS_TOO_MANY; if (!control) control = rtems_capture_create_control (name, id); if (!control) return RTEMS_NO_MEMORY; return RTEMS_SUCCESSFUL; } /* * This function removes a watch for a specific task given a name. The task * description will still exist if referenced by a trace record in the trace * buffer or a global watch is defined. */ rtems_status_code rtems_capture_watch_del (rtems_name name, rtems_id id) { rtems_interrupt_lock_context lock_context; rtems_capture_control_t* control; rtems_capture_control_t** prev_control; rtems_capture_task_t* task; bool found = false; /* * Should this test be for wildcards ? */ for (prev_control = &capture_controls, control = capture_controls; control != NULL; ) { if (rtems_capture_match_name_id (control->name, control->id, name, id)) { rtems_interrupt_lock_acquire (&capture_lock, &lock_context); for (task = capture_tasks; task != NULL; task = task->forw) if (task->control == control) task->control = 0; *prev_control = control->next; rtems_interrupt_lock_release (&capture_lock, &lock_context); rtems_workspace_free (control); control = *prev_control; found = true; } else { prev_control = &control->next; control = control->next; } } if (found) return RTEMS_SUCCESSFUL; return RTEMS_INVALID_NAME; } /* * This function allows control of a watch. The watch can be enabled or * disabled. */ rtems_status_code rtems_capture_watch_ctrl (rtems_name name, rtems_id id, bool enable) { rtems_interrupt_lock_context lock_context; rtems_capture_control_t* control; bool found = false; /* * Find the control and then set the watch. It must exist before it can * be controlled. */ for (control = capture_controls; control != NULL; control = control->next) { if (rtems_capture_match_name_id (control->name, control->id, name, id)) { rtems_interrupt_lock_acquire (&capture_lock, &lock_context); if (enable) control->flags |= RTEMS_CAPTURE_WATCH; else control->flags &= ~RTEMS_CAPTURE_WATCH; rtems_interrupt_lock_release (&capture_lock, &lock_context); found = true; } } if (found) return RTEMS_SUCCESSFUL; return RTEMS_INVALID_NAME; } /* * This function allows control of a global watch. The watch can be enabled or * disabled. A global watch configures all tasks below the ceiling and above * the floor to be traced. */ rtems_status_code rtems_capture_watch_global (bool enable) { rtems_interrupt_lock_context lock_context; rtems_interrupt_lock_acquire (&capture_lock, &lock_context); /* * We need to keep specific and global watches separate so * a global enable/disable does not lose a specific watch. */ if (enable) capture_flags |= RTEMS_CAPTURE_GLOBAL_WATCH; else capture_flags &= ~RTEMS_CAPTURE_GLOBAL_WATCH; rtems_interrupt_lock_release (&capture_lock, &lock_context); return RTEMS_SUCCESSFUL; } /* * This function returns the global watch state. */ bool rtems_capture_watch_global_on (void) { return capture_flags & RTEMS_CAPTURE_GLOBAL_WATCH ? 1 : 0; } /* * This function sets a watch ceiling. Tasks at or greating that the * ceiling priority are not watched. This is a simple way to monitor * an application and exclude system tasks running at a higher * priority level. */ rtems_status_code rtems_capture_watch_ceiling (rtems_task_priority ceiling) { capture_ceiling = ceiling; return RTEMS_SUCCESSFUL; } /* * This function gets the watch ceiling. */ rtems_task_priority rtems_capture_watch_get_ceiling (void) { return capture_ceiling; } /* * This function sets a watch floor. Tasks at or less that the * floor priority are not watched. This is a simple way to monitor * an application and exclude system tasks running at a lower * priority level. */ rtems_status_code rtems_capture_watch_floor (rtems_task_priority floor) { capture_floor = floor; return RTEMS_SUCCESSFUL; } /* * This function gets the watch floor. */ rtems_task_priority rtems_capture_watch_get_floor (void) { return capture_floor; } /* * Map the trigger to a bit mask. */ static uint32_t rtems_capture_map_trigger (rtems_capture_trigger_t trigger) { /* * Transform the mode and trigger to a bit map. */ switch (trigger) { case rtems_capture_switch: return RTEMS_CAPTURE_SWITCH; case rtems_capture_create: return RTEMS_CAPTURE_CREATE; case rtems_capture_start: return RTEMS_CAPTURE_START; case rtems_capture_restart: return RTEMS_CAPTURE_RESTART; case rtems_capture_delete: return RTEMS_CAPTURE_DELETE; case rtems_capture_begin: return RTEMS_CAPTURE_BEGIN; case rtems_capture_exitted: return RTEMS_CAPTURE_EXITTED; case rtems_capture_terminated: return RTEMS_CAPTURE_TERMINATED; default: break; } return 0; } /* * This function sets a trigger. * * This set trigger routine will create a capture control for the * target task. The task list is searched and any existing tasks * are linked to the new control. * * We can have a number of tasks that have the same name so we * search using names. This means a number of tasks can be * linked to single control. */ rtems_status_code rtems_capture_set_trigger (rtems_name from_name, rtems_id from_id, rtems_name to_name, rtems_id to_id, rtems_capture_trigger_mode_t mode, rtems_capture_trigger_t trigger) { rtems_capture_control_t* control; uint32_t flags; flags = rtems_capture_map_trigger (trigger); /* * The mode sets the opposite type of trigger. For example * FROM ANY means trigger when the event happens TO this * task. TO ANY means FROM this task. */ if (mode == rtems_capture_to_any) { control = rtems_capture_create_control (from_name, from_id); if (control == NULL) return RTEMS_NO_MEMORY; control->from_triggers |= flags & RTEMS_CAPTURE_FROM_TRIGS; } else { control = rtems_capture_create_control (to_name, to_id); if (control == NULL) return RTEMS_NO_MEMORY; if (mode == rtems_capture_from_any) control->to_triggers |= flags; else { bool done = false; int i; control->by_triggers |= flags; for (i = 0; i < RTEMS_CAPTURE_TRIGGER_TASKS; i++) { if (rtems_capture_control_by_valid (control, i) && ((control->by[i].name == from_name) || (from_id && (control->by[i].id == from_id)))) { control->by[i].trigger |= flags; done = true; break; } } if (!done) { for (i = 0; i < RTEMS_CAPTURE_TRIGGER_TASKS; i++) { if (!rtems_capture_control_by_valid (control, i)) { control->by_valid |= RTEMS_CAPTURE_CONTROL_FROM_MASK (i); control->by[i].name = from_name; control->by[i].id = from_id; control->by[i].trigger = flags; done = true; break; } } } if (!done) return RTEMS_TOO_MANY; } } return RTEMS_SUCCESSFUL; } /* * This function clear a trigger. */ rtems_status_code rtems_capture_clear_trigger (rtems_name from_name, rtems_id from_id, rtems_name to_name, rtems_id to_id, rtems_capture_trigger_mode_t mode, rtems_capture_trigger_t trigger) { rtems_capture_control_t* control; uint32_t flags; flags = rtems_capture_map_trigger (trigger); if (mode == rtems_capture_to_any) { control = rtems_capture_find_control (from_name, from_id); if (control == NULL) { if (from_id) return RTEMS_INVALID_ID; return RTEMS_INVALID_NAME; } control->from_triggers &= ~flags; } else { control = rtems_capture_find_control (to_name, to_id); if (control == NULL) { if (to_id) return RTEMS_INVALID_ID; return RTEMS_INVALID_NAME; } if (mode == rtems_capture_from_any) control->to_triggers &= ~flags; else { bool done = false; int i; control->by_triggers &= ~flags; for (i = 0; i < RTEMS_CAPTURE_TRIGGER_TASKS; i++) { if (rtems_capture_control_by_valid (control, i) && ((control->by[i].name == from_name) || (control->by[i].id == from_id))) { control->by[i].trigger &= ~trigger; if (control->by[i].trigger == 0) control->by_valid &= ~RTEMS_CAPTURE_CONTROL_FROM_MASK (i); done = true; break; } } if (!done) { if (from_id) return RTEMS_INVALID_ID; return RTEMS_INVALID_NAME; } } } return RTEMS_SUCCESSFUL; } static inline uint32_t rtems_capture_count_records( void* recs, size_t size ) { rtems_capture_record_t* rec; uint8_t* ptr = recs; uint32_t rec_count = 0; size_t byte_count = 0; while (byte_count < size) { rec = (rtems_capture_record_t*) ptr; rec_count++; _Assert( rec->size >= sizeof(*rec) ); ptr += rec->size; byte_count += rec->size; _Assert( rec_count <= capture_count ); }; return rec_count; } /* * This function reads a number of records from the capture buffer. * The user can optionally block and wait until the buffer as a * specific number of records available or a specific time has * elasped. * * The function returns the number of record that is has that are * in a continous block of memory. If the number of available records * wrap then only those records are provided. This removes the need for * caller to be concerned about buffer wrappings. If the number of * requested records cannot be met due to the wrapping of the records * less than the specified number will be returned. * * The user must release the records. This is achieved with a call to * rtems_capture_release. Calls this function without a release will * result in at least the same number of records being released. * * The 'threshold' parameter is the number of records that must be * captured before returning. If a timeout period is specified (non-0) * any captured records will be returned. These parameters stop * thrashing occuring for a small number of records, yet allows * a user configured latiency to be applied for single events. * * The 'timeout' parameter is in micro-seconds. A value of 0 will disable * the timeout. */ rtems_status_code rtems_capture_read (uint32_t threshold, uint32_t timeout, uint32_t* read, rtems_capture_record_t** recs) { rtems_interrupt_lock_context lock_context; rtems_status_code sc = RTEMS_SUCCESSFUL; size_t recs_size = 0; bool wrapped; *read = 0; *recs = NULL; rtems_interrupt_lock_acquire (&capture_lock, &lock_context); /* * Only one reader is allowed. */ if (capture_flags & RTEMS_CAPTURE_READER_ACTIVE) { rtems_interrupt_lock_release (&capture_lock, &lock_context); return RTEMS_RESOURCE_IN_USE; } capture_flags |= RTEMS_CAPTURE_READER_ACTIVE; *recs = rtems_capture_buffer_peek( &capture_records, &recs_size ); *read = rtems_capture_count_records( *recs, recs_size ); rtems_interrupt_lock_release (&capture_lock, &lock_context); for (;;) { /* * See if the data wraps the end of the record buffer. */ wrapped = rtems_capture_buffer_has_wrapped( &capture_records); /* * Do we have a threshold and have not wrapped * around the end of the capture record buffer ? */ if ((!wrapped) && threshold) { /* * Do we have enough records ? */ if (*read < threshold) { rtems_event_set event_out; rtems_task_ident (RTEMS_SELF, RTEMS_LOCAL, &capture_reader); rtems_interrupt_lock_acquire (&capture_lock, &lock_context); capture_flags |= RTEMS_CAPTURE_READER_WAITING; rtems_interrupt_lock_release (&capture_lock, &lock_context); sc = rtems_event_receive (RTEMS_EVENT_0, RTEMS_WAIT | RTEMS_EVENT_ANY, RTEMS_MICROSECONDS_TO_TICKS (timeout), &event_out); /* * Let the user handle all other sorts of errors. This may * not be the best solution, but oh well, it will do for * now. */ if ((sc != RTEMS_SUCCESSFUL) && (sc != RTEMS_TIMEOUT)) break; rtems_interrupt_lock_acquire (&capture_lock, &lock_context); *recs = rtems_capture_buffer_peek( &capture_records, &recs_size ); *read = rtems_capture_count_records( *recs, recs_size ); rtems_interrupt_lock_release (&capture_lock, &lock_context); continue; } } /* * Always out if we reach here. To loop use continue. */ break; } return sc; } /* * This function releases the requested number of record slots back * to the capture engine. The count must match the number read. */ rtems_status_code rtems_capture_release (uint32_t count) { rtems_interrupt_lock_context lock_context; uint8_t* ptr; rtems_capture_record_t* rec; uint32_t counted; size_t ptr_size = 0; rtems_interrupt_lock_acquire (&capture_lock, &lock_context); if (count > capture_count) count = capture_count; rtems_interrupt_lock_release (&capture_lock, &lock_context); counted = count; ptr = rtems_capture_buffer_peek( &capture_records, &ptr_size ); _Assert(ptr_size >= (count * sizeof(*rec) )); ptr_size = 0; while (counted--) { rec = (rtems_capture_record_t*) ptr; ptr_size += rec->size; rtems_capture_refcount_down (rec->task); rtems_capture_destroy_capture_task (rec->task); ptr += rec->size; } rtems_interrupt_lock_acquire (&capture_lock, &lock_context); capture_count -= count; if (count) rtems_capture_buffer_free( &capture_records, ptr_size ); capture_flags &= ~RTEMS_CAPTURE_READER_ACTIVE; rtems_interrupt_lock_release (&capture_lock, &lock_context); return RTEMS_SUCCESSFUL; } /* * This function returns the current time. If a handler is provided * by the user get the time from that. */ void rtems_capture_time (rtems_capture_time_t* uptime) { rtems_capture_get_time(uptime); } /* * This function returns a string for an event based on the bit in the * event. The functions takes the bit offset as a number not the bit * set in a bit map. */ const char* rtems_capture_event_text (int event) { if ((event < RTEMS_CAPTURE_EVENT_START) || (event > RTEMS_CAPTURE_EVENT_END)) return "invalid event id"; return capture_event_text[event - RTEMS_CAPTURE_EVENT_START]; } /* * This function returns the head of the list of tasks that the * capture engine has detected. */ rtems_capture_task_t* rtems_capture_get_task_list (void) { return capture_tasks; } /* * This function updates the stack usage. The task control block * is updated. */ uint32_t rtems_capture_task_stack_usage (rtems_capture_task_t* task) { if (task->tcb) { uint32_t* st; uint32_t* s; /* * @todo: Assumes all stacks move the same way. */ st = task->tcb->Start.Initial_stack.area + task->stack_size; s = task->tcb->Start.Initial_stack.area; while (s < st) { if (*s != 0xdeaddead) break; s++; } task->stack_clean = s - (uint32_t*) task->tcb->Start.Initial_stack.area; } return task->stack_clean; } /* * This function returns the head of the list of control in the * capture engine. */ rtems_capture_control_t* rtems_capture_get_control_list (void) { return capture_controls; }