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incubator-nuttx/drivers/note/note_driver.c

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/****************************************************************************
* drivers/note/note_driver.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <stdint.h>
#include <stdarg.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <time.h>
#include <nuttx/irq.h>
#include <nuttx/sched.h>
#include <nuttx/clock.h>
#include <nuttx/note/note_driver.h>
#include <nuttx/note/noteram_driver.h>
#include <nuttx/note/notelog_driver.h>
#include <nuttx/note/notestream_driver.h>
#include <nuttx/spinlock.h>
#include <nuttx/sched_note.h>
#include "sched/sched.h"
#include "noterpmsg.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#if defined(CONFIG_DRIVERS_NOTERAM) + defined(CONFIG_DRIVERS_NOTELOG) + \
defined(CONFIG_DRIVERS_NOTESNAP) + defined(CONFIG_DRIVERS_NOTERTT) + \
defined(CONFIG_SEGGER_SYSVIEW) > CONFIG_DRIVERS_NOTE_MAX
# error "Maximum channel number exceeds. "
#endif
#define note_add(drv, note, notelen) \
((drv)->ops->add(drv, note, notelen))
#define note_start(drv, tcb) \
((drv)->ops->start && ((drv)->ops->start(drv, tcb), true))
#define note_stop(drv, tcb) \
((drv)->ops->stop && ((drv)->ops->stop(drv, tcb), true))
#define note_suspend(drv, tcb) \
((drv)->ops->suspend && ((drv)->ops->suspend(drv, tcb), true))
#define note_resume(drv, tcb) \
((drv)->ops->resume && ((drv)->ops->resume(drv, tcb), true))
#define note_cpu_start(drv, tcb, cpu) \
((drv)->ops->cpu_start && ((drv)->ops->cpu_start(drv, tcb, cpu), true))
#define note_cpu_started(drv, tcb) \
((drv)->ops->cpu_started && ((drv)->ops->cpu_started(drv, tcb), true))
#define note_cpu_pause(drv, tcb, cpu) \
((drv)->ops->cpu_pause && ((drv)->ops->cpu_pause(drv, tcb, cpu), true))
#define note_cpu_paused(drv, tcb) \
((drv)->ops->cpu_paused && ((drv)->ops->cpu_paused(drv, tcb), true))
#define note_cpu_resume(drv, tcb, cpu) \
((drv)->ops->cpu_resume && ((drv)->ops->cpu_resume(drv, tcb, cpu), true))
#define note_cpu_resumed(drv, tcb) \
((drv)->ops->cpu_resumed && ((drv)->ops->cpu_resumed(drv, tcb), true))
#define note_premption(drv, tcb, locked) \
((drv)->ops->premption && ((drv)->ops->premption(drv, tcb, locked), true))
#define note_csection(drv, tcb, enter) \
((drv)->ops->csection && ((drv)->ops->csection(drv, tcb, enter), true))
#define note_spinlock(drv, tcb, spinlock, type) \
((drv)->ops->spinlock && \
((drv)->ops->spinlock(drv, tcb, spinlock, type), true))
#define note_syscall_enter(drv, nr, argc, ap) \
((drv)->ops->syscall_enter && \
((drv)->ops->syscall_enter(drv, nr, argc, ap), true))
#define note_syscall_leave(drv, nr, result) \
((drv)->ops->syscall_leave && \
((drv)->ops->syscall_leave(drv, nr, result), true))
#define note_irqhandler(drv, irq, handler, enter) \
((drv)->ops->irqhandler && \
((drv)->ops->irqhandler(drv, irq, handler, enter), true))
#define note_heap(drv, event, data, mem, size, used) \
((drv)->ops->heap && ((drv)->ops->heap(drv, event, data, mem, size, used), true))
#define note_wdog(drv, event, handler, arg) \
((drv)->ops->wdog && ((drv)->ops->wdog(drv, event, handler, arg), true))
#define note_event(drv, ip, event, buf, len) \
((drv)->ops->event && ((drv)->ops->event(drv, ip, event, buf, len), true))
#define note_vprintf(drv, ip, fmt, va) \
((drv)->ops->vprintf && ((drv)->ops->vprintf(drv, ip, fmt, va), true))
/****************************************************************************
* Private Types
****************************************************************************/
struct note_startalloc_s
{
struct note_common_s nsa_cmn; /* Common note parameters */
#if CONFIG_TASK_NAME_SIZE > 0
char nsa_name[CONFIG_TASK_NAME_SIZE + 1];
#endif
};
#if CONFIG_TASK_NAME_SIZE > 0
# define SIZEOF_NOTE_START(n) (sizeof(struct note_start_s) + (n) - 1)
#else
# define SIZEOF_NOTE_START(n) (sizeof(struct note_start_s))
#endif
#if CONFIG_DRIVERS_NOTE_TASKNAME_BUFSIZE > 0
struct note_taskname_info_s
{
pid_t pid;
uint8_t size;
char name[1];
};
struct note_taskname_s
{
size_t head;
size_t tail;
char buffer[CONFIG_DRIVERS_NOTE_TASKNAME_BUFSIZE];
};
#endif
/****************************************************************************
* Private Data
****************************************************************************/
#ifdef CONFIG_SCHED_INSTRUMENTATION_FILTER
#ifdef CONFIG_SCHED_INSTRUMENTATION_IRQHANDLER
static unsigned int g_note_disabled_irq_nest[CONFIG_SMP_NCPUS];
#endif
#endif
FAR static struct note_driver_s *
g_note_drivers[CONFIG_DRIVERS_NOTE_MAX + 1] =
{
#ifdef CONFIG_DRIVERS_NOTERAM
(FAR struct note_driver_s *)&g_noteram_driver,
#endif
#ifdef CONFIG_DRIVERS_NOTELOG
(FAR struct note_driver_s *)&g_notelog_driver,
#endif
#ifdef CONFIG_DRIVERS_NOTELOWEROUT
(FAR struct note_driver_s *)&g_notestream_lowerout,
#endif
#ifdef CONFIG_DRIVERS_NOTERPMSG
(FAR struct note_driver_s *)&g_noterpmsg_driver,
#endif
NULL
};
#if CONFIG_DRIVERS_NOTE_TASKNAME_BUFSIZE > 0 && \
defined(CONFIG_SCHED_INSTRUMENTATION_SWITCH)
static struct note_taskname_s g_note_taskname;
#endif
#if defined(CONFIG_SCHED_INSTRUMENTATION_FILTER)
static spinlock_t g_note_lock;
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: note_common
*
* Description:
* Fill in some of the common fields in the note structure.
*
* Input Parameters:
* tcb - The TCB containing the information
* note - The common note structure to use
* length - The total lengthof the note structure
* type - The type of the note
*
* Returned Value:
* None
*
****************************************************************************/
static void note_common(FAR struct tcb_s *tcb,
FAR struct note_common_s *note,
uint8_t length, uint8_t type)
{
/* Save all of the common fields */
note->nc_length = length;
note->nc_type = type;
note->nc_cpu = this_cpu();
if (tcb == NULL)
{
note->nc_priority = CONFIG_INIT_PRIORITY;
note->nc_pid = 0;
}
else
{
note->nc_priority = tcb->sched_priority;
note->nc_pid = tcb->pid;
}
note->nc_systime = perf_gettime();
}
/****************************************************************************
* Name: note_isenabled
*
* Description:
* Check whether the instrumentation is enabled.
*
* Input Parameters:
* driver - The channel of note driver
*
* Returned Value:
* True is returned if the instrumentation is enabled.
*
****************************************************************************/
static inline int note_isenabled(FAR struct note_driver_s *driver)
{
#ifdef CONFIG_SCHED_INSTRUMENTATION_FILTER
if (!(driver->filter.mode.flag & NOTE_FILTER_MODE_FLAG_ENABLE))
{
return false;
}
#ifdef CONFIG_SMP
/* Ignore notes that are not in the set of monitored CPUs */
if (CPU_ISSET(this_cpu(), &driver->filter.mode.cpuset) == 0)
{
/* Not in the set of monitored CPUs. Do not log the note. */
return false;
}
#endif
#endif
return true;
}
/****************************************************************************
* Name: note_isenabled_switch
*
* Description:
* Check whether the switch instrumentation is enabled.
*
* Input Parameters:
* driver - The channel of note driver
*
* Returned Value:
* True is returned if the instrumentation is enabled.
*
****************************************************************************/
#ifdef CONFIG_SCHED_INSTRUMENTATION_SWITCH
static inline int note_isenabled_switch(FAR struct note_driver_s *driver)
{
#ifdef CONFIG_SCHED_INSTRUMENTATION_FILTER
if (!note_isenabled(driver))
{
return false;
}
/* If the switch trace is disabled, do nothing. */
if ((driver->filter.mode.flag & NOTE_FILTER_MODE_FLAG_SWITCH) == 0)
{
return false;
}
#endif
return true;
}
#endif
/****************************************************************************
* Name: note_isenabled_syscall
*
* Description:
* Check whether the syscall instrumentation is enabled.
*
* Input Parameters:
* driver - The channel of note driver
* nr - syscall number
*
* Returned Value:
* True is returned if the instrumentation is enabled.
*
****************************************************************************/
#ifdef CONFIG_SCHED_INSTRUMENTATION_SYSCALL
static inline int note_isenabled_syscall(FAR struct note_driver_s *driver,
int nr)
{
#ifdef CONFIG_SCHED_INSTRUMENTATION_FILTER
if (!note_isenabled(driver))
{
return false;
}
/* Exclude the case of syscall called by the interrupt handler which is
* not traced.
*/
if (up_interrupt_context())
{
#ifdef CONFIG_SCHED_INSTRUMENTATION_IRQHANDLER
int cpu = this_cpu();
if (g_note_disabled_irq_nest[cpu] > 0)
{
return false;
}
#else
return false;
#endif
}
/* If the syscall trace is disabled or the syscall number is masked,
* do nothing.
*/
if (!(driver->filter.mode.flag & NOTE_FILTER_MODE_FLAG_SYSCALL) ||
NOTE_FILTER_SYSCALLMASK_ISSET(nr - CONFIG_SYS_RESERVED,
&driver->filter.syscall_mask))
{
return false;
}
#endif
return true;
}
#endif
/****************************************************************************
* Name: note_isenabled_irqhandler
*
* Description:
* Check whether the interrupt handler instrumentation is enabled.
*
* Input Parameters:
* driver - The channel of note driver
* irq - IRQ number
* enter - interrupt enter/leave flag
*
* Returned Value:
* True is returned if the instrumentation is enabled.
*
****************************************************************************/
#ifdef CONFIG_SCHED_INSTRUMENTATION_IRQHANDLER
static inline int note_isenabled_irq(FAR struct note_driver_s *driver,
int irq, bool enter)
{
#ifdef CONFIG_SCHED_INSTRUMENTATION_FILTER
if (!note_isenabled(driver))
{
return false;
}
/* If the IRQ trace is disabled or the IRQ number is masked, disable
* subsequent syscall traces until leaving the interrupt handler
*/
if (!(driver->filter.mode.flag & NOTE_FILTER_MODE_FLAG_IRQ) ||
NOTE_FILTER_IRQMASK_ISSET(irq, &driver->filter.irq_mask))
{
int cpu = this_cpu();
if (enter)
{
g_note_disabled_irq_nest[cpu]++;
}
else
{
g_note_disabled_irq_nest[cpu]--;
}
return false;
}
#endif
return true;
}
#endif
/****************************************************************************
* Name: note_isenabled_dump
*
* Description:
* Check whether the dump instrumentation is enabled.
*
* Input Parameters:
* driver - The channel of note driver
* tag: The dump instrumentation tag
*
* Returned Value:
* True is returned if the instrumentation is enabled.
*
****************************************************************************/
#ifdef CONFIG_SCHED_INSTRUMENTATION_DUMP
static inline int note_isenabled_dump(FAR struct note_driver_s *driver,
uint32_t tag)
{
# ifdef CONFIG_SCHED_INSTRUMENTATION_FILTER
if (!note_isenabled(driver))
{
return false;
}
/* If the dump trace is disabled, do nothing. */
if (!(driver->filter.mode.flag & NOTE_FILTER_MODE_FLAG_DUMP) ||
NOTE_FILTER_TAGMASK_ISSET(tag, &driver->filter.tag_mask))
{
return false;
}
# endif
return true;
}
#endif
#ifdef CONFIG_SCHED_INSTRUMENTATION_SWITCH
#if CONFIG_DRIVERS_NOTE_TASKNAME_BUFSIZE > 0
/****************************************************************************
* Name: note_find_taskname
*
* Description:
* Find task name info corresponding to the specified PID
*
* Input Parameters:
* PID - Task ID
*
* Returned Value:
* Pointer to the task name info
* If the corresponding info doesn't exist in the buffer, NULL is returned.
*
****************************************************************************/
static FAR struct note_taskname_info_s *note_find_taskname(pid_t pid)
{
FAR struct note_taskname_info_s *ti;
int n = g_note_taskname.tail;
while (n != g_note_taskname.head)
{
ti = (FAR struct note_taskname_info_s *)
&g_note_taskname.buffer[n];
if (ti->pid == pid)
{
return ti;
}
n += ti->size;
if (n >= CONFIG_DRIVERS_NOTE_TASKNAME_BUFSIZE)
{
n -= CONFIG_DRIVERS_NOTE_TASKNAME_BUFSIZE;
}
}
return NULL;
}
/****************************************************************************
* Name: note_record_taskname
*
* Description:
* Record the task name info of the specified task
*
* Input Parameters:
* PID - Task ID
* name - task name
*
* Returned Value:
* None
*
****************************************************************************/
static void note_record_taskname(pid_t pid, FAR const char *name)
{
FAR struct note_taskname_info_s *ti;
size_t tilen;
size_t namelen;
size_t skiplen;
size_t remain;
namelen = strlen(name);
DEBUGASSERT(namelen <= CONFIG_TASK_NAME_SIZE);
tilen = sizeof(struct note_taskname_info_s) + namelen;
DEBUGASSERT(tilen <= UCHAR_MAX);
skiplen = CONFIG_DRIVERS_NOTE_TASKNAME_BUFSIZE - g_note_taskname.head;
if (skiplen >= tilen + sizeof(struct note_taskname_info_s))
{
skiplen = 0; /* Have enough space at the tail - needn't skip */
}
if (g_note_taskname.head >= g_note_taskname.tail)
{
remain = CONFIG_DRIVERS_NOTE_TASKNAME_BUFSIZE -
(g_note_taskname.head - g_note_taskname.tail);
}
else
{
remain = g_note_taskname.tail - g_note_taskname.head;
}
while (skiplen + tilen >= remain)
{
/* No enough space, drop the old info */
ti = (FAR struct note_taskname_info_s *)
&g_note_taskname.buffer[g_note_taskname.tail];
g_note_taskname.tail = (g_note_taskname.tail + ti->size) %
CONFIG_DRIVERS_NOTE_TASKNAME_BUFSIZE;
remain += ti->size;
}
if (skiplen)
{
/* Fill the skipped region with an invalid info */
ti = (FAR struct note_taskname_info_s *)
&g_note_taskname.buffer[g_note_taskname.head];
ti->size = skiplen;
ti->pid = INVALID_PROCESS_ID;
ti->name[0] = '\0';
/* Move to the begin of circle buffer */
g_note_taskname.head = 0;
}
ti = (FAR struct note_taskname_info_s *)
&g_note_taskname.buffer[g_note_taskname.head];
ti->size = NOTE_ALIGN(tilen);
ti->pid = pid;
strlcpy(ti->name, name, namelen + 1);
g_note_taskname.head += ti->size;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
#ifdef CONFIG_SCHED_INSTRUMENTATION
/****************************************************************************
* Name: sched_note_add
*
* Description:
* Forward rpmsg note data to individual channels.This process does
* not require filtering
*
* Input Parameters:
* data - The forward note data.
* len - The len of forward note data.
*
* Returned Value:
* None
*
* Assumptions:
* We are within a critical section.
*
****************************************************************************/
void sched_note_add(FAR const void *data, size_t len)
{
DEBUGASSERT(data);
while (len >= sizeof(struct note_common_s))
{
FAR struct note_common_s *note = (FAR struct note_common_s *)data;
size_t notelen = note->nc_length;
FAR struct note_driver_s **driver;
DEBUGASSERT(notelen >= sizeof(struct note_common_s) &&
len >= notelen);
for (driver = g_note_drivers; *driver; driver++)
{
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Add the note to circular buffer */
note_add(*driver, note, notelen);
}
data += notelen;
len -= notelen;
}
}
#endif
/****************************************************************************
* Name: sched_note_*
*
* Description:
* These are the hooks into the scheduling instrumentation logic. Each
* simply formats the note associated with the schedule event and adds
* that note to the circular buffer.
*
* Input Parameters:
* tcb - The TCB of the thread.
*
* Returned Value:
* None
*
* Assumptions:
* We are within a critical section.
*
****************************************************************************/
void sched_note_start(FAR struct tcb_s *tcb)
{
struct note_startalloc_s note;
unsigned int length;
FAR struct note_driver_s **driver;
bool formatted = false;
#if CONFIG_TASK_NAME_SIZE > 0
int namelen = 0;
#endif
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled(*driver))
{
continue;
}
if (note_start(*driver, tcb))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
if (!formatted)
{
formatted = true;
/* Copy the task name (if possible) and
* get the length of the note
*/
#if CONFIG_TASK_NAME_SIZE > 0
if (tcb->name[0] != '\0')
{
namelen = strlen(tcb->name);
}
DEBUGASSERT(namelen <= CONFIG_TASK_NAME_SIZE);
strlcpy(note.nsa_name, tcb->name, sizeof(note.nsa_name));
length = SIZEOF_NOTE_START(namelen + 1);
#else
length = SIZEOF_NOTE_START(0);
#endif
/* Finish formatting the note */
note_common(tcb, &note.nsa_cmn, length, NOTE_START);
}
/* Add the note to circular buffer */
note_add(*driver, &note, length);
}
}
void sched_note_stop(FAR struct tcb_s *tcb)
{
struct note_stop_s note;
FAR struct note_driver_s **driver;
bool formatted = false;
#if CONFIG_DRIVERS_NOTE_TASKNAME_BUFSIZE > 0
note_record_taskname(tcb->pid, tcb->name);
#endif
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled(*driver))
{
continue;
}
if (note_stop(*driver, tcb))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Format the note */
if (!formatted)
{
formatted = true;
note_common(tcb, &note.nsp_cmn, sizeof(struct note_stop_s),
NOTE_STOP);
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(struct note_stop_s));
}
}
void sched_note_suspend(FAR struct tcb_s *tcb)
{
struct note_suspend_s note;
FAR struct note_driver_s **driver;
bool formatted = false;
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled_switch(*driver))
{
continue;
}
if (note_suspend(*driver, tcb))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Format the note */
if (!formatted)
{
formatted = true;
note_common(tcb, &note.nsu_cmn, sizeof(struct note_suspend_s),
NOTE_SUSPEND);
note.nsu_state = tcb->task_state;
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(struct note_suspend_s));
}
}
void sched_note_resume(FAR struct tcb_s *tcb)
{
struct note_resume_s note;
FAR struct note_driver_s **driver;
bool formatted = false;
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled_switch(*driver))
{
continue;
}
if (note_resume(*driver, tcb))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Format the note */
if (!formatted)
{
formatted = true;
note_common(tcb, &note.nre_cmn, sizeof(struct note_resume_s),
NOTE_RESUME);
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(struct note_resume_s));
}
}
#ifdef CONFIG_SMP
void sched_note_cpu_start(FAR struct tcb_s *tcb, int cpu)
{
struct note_cpu_start_s note;
FAR struct note_driver_s **driver;
bool formatted = false;
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled(*driver))
{
continue;
}
if (note_cpu_start(*driver, tcb, cpu))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Format the note */
if (!formatted)
{
formatted = true;
note_common(tcb, &note.ncs_cmn, sizeof(struct note_cpu_start_s),
NOTE_CPU_START);
note.ncs_target = (uint8_t)cpu;
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(struct note_cpu_start_s));
}
}
void sched_note_cpu_started(FAR struct tcb_s *tcb)
{
struct note_cpu_started_s note;
FAR struct note_driver_s **driver;
bool formatted = false;
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled(*driver))
{
continue;
}
if (note_cpu_started(*driver, tcb))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Format the note */
if (!formatted)
{
formatted = true;
note_common(tcb, &note.ncs_cmn, sizeof(struct note_cpu_started_s),
NOTE_CPU_STARTED);
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(struct note_cpu_started_s));
}
}
void sched_note_cpu_pause(FAR struct tcb_s *tcb, int cpu)
{
struct note_cpu_pause_s note;
FAR struct note_driver_s **driver;
bool formatted = false;
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled_switch(*driver))
{
continue;
}
if (note_cpu_pause(*driver, tcb, cpu))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Format the note */
if (!formatted)
{
formatted = true;
note_common(tcb, &note.ncp_cmn, sizeof(struct note_cpu_pause_s),
NOTE_CPU_PAUSE);
note.ncp_target = (uint8_t)cpu;
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(struct note_cpu_pause_s));
}
}
void sched_note_cpu_paused(FAR struct tcb_s *tcb)
{
struct note_cpu_paused_s note;
FAR struct note_driver_s **driver;
bool formatted = false;
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled_switch(*driver))
{
continue;
}
if (note_cpu_paused(*driver, tcb))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Format the note */
if (!formatted)
{
formatted = true;
note_common(tcb, &note.ncp_cmn, sizeof(struct note_cpu_paused_s),
NOTE_CPU_PAUSED);
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(struct note_cpu_paused_s));
}
}
void sched_note_cpu_resume(FAR struct tcb_s *tcb, int cpu)
{
struct note_cpu_resume_s note;
FAR struct note_driver_s **driver;
bool formatted = false;
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled_switch(*driver))
{
continue;
}
if (note_cpu_resume(*driver, tcb, cpu))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Format the note */
if (!formatted)
{
formatted = true;
note_common(tcb, &note.ncr_cmn, sizeof(struct note_cpu_resume_s),
NOTE_CPU_RESUME);
note.ncr_target = (uint8_t)cpu;
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(struct note_cpu_resume_s));
}
}
void sched_note_cpu_resumed(FAR struct tcb_s *tcb)
{
struct note_cpu_resumed_s note;
FAR struct note_driver_s **driver;
bool formatted = false;
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled_switch(*driver))
{
continue;
}
if (note_cpu_resumed(*driver, tcb))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Format the note */
if (!formatted)
{
formatted = true;
note_common(tcb, &note.ncr_cmn, sizeof(struct note_cpu_resumed_s),
NOTE_CPU_RESUMED);
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(struct note_cpu_resumed_s));
}
}
#endif /* CONFIG_SMP */
#endif /* CONFIG_SCHED_INSTRUMENTATION_SWITCH */
#ifdef CONFIG_SCHED_INSTRUMENTATION_PREEMPTION
void sched_note_premption(FAR struct tcb_s *tcb, bool locked)
{
struct note_preempt_s note;
FAR struct note_driver_s **driver;
bool formatted = false;
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled(*driver))
{
continue;
}
if (note_premption(*driver, tcb, locked))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Format the note */
if (!formatted)
{
formatted = true;
note_common(tcb, &note.npr_cmn, sizeof(struct note_preempt_s),
locked ? NOTE_PREEMPT_LOCK : NOTE_PREEMPT_UNLOCK);
note.npr_count = tcb->lockcount;
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(struct note_preempt_s));
}
}
#endif
#ifdef CONFIG_SCHED_INSTRUMENTATION_CSECTION
void sched_note_csection(FAR struct tcb_s *tcb, bool enter)
{
struct note_csection_s note;
FAR struct note_driver_s **driver;
bool formatted = false;
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled(*driver))
{
continue;
}
if (note_csection(*driver, tcb, enter))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Format the note */
if (!formatted)
{
formatted = true;
note_common(tcb, &note.ncs_cmn, sizeof(struct note_csection_s),
enter ? NOTE_CSECTION_ENTER : NOTE_CSECTION_LEAVE);
#ifdef CONFIG_SMP
note.ncs_count = tcb->irqcount;
#endif
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(struct note_csection_s));
}
}
#endif
/****************************************************************************
* Name: sched_note_spinlock
*
* Description:
* Common logic for NOTE_SPINLOCK, NOTE_SPINLOCKED, and NOTE_SPINUNLOCK
*
* Input Parameters:
* tcb - The TCB containing the information
* note - The common note structure to use
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_SCHED_INSTRUMENTATION_SPINLOCKS
void sched_note_spinlock(FAR struct tcb_s *tcb,
FAR volatile spinlock_t *spinlock,
int type)
{
struct note_spinlock_s note;
FAR struct note_driver_s **driver;
bool formatted = false;
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled(*driver))
{
continue;
}
if (note_spinlock(*driver, tcb, spinlock, type))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Format the note */
if (!formatted)
{
formatted = true;
note_common(tcb, &note.nsp_cmn, sizeof(struct note_spinlock_s),
type);
note.nsp_spinlock = (uintptr_t)spinlock;
note.nsp_value = *(FAR uint8_t *)spinlock;
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(struct note_spinlock_s));
}
}
void sched_note_spinlock_lock(FAR volatile spinlock_t *spinlock)
{
sched_note_spinlock(this_task(), spinlock, NOTE_SPINLOCK_LOCK);
}
void sched_note_spinlock_locked(FAR volatile spinlock_t *spinlock)
{
sched_note_spinlock(this_task(), spinlock, NOTE_SPINLOCK_LOCKED);
}
void sched_note_spinlock_abort(FAR volatile spinlock_t *spinlock)
{
sched_note_spinlock(this_task(), spinlock, NOTE_SPINLOCK_ABORT);
}
void sched_note_spinlock_unlock(FAR volatile spinlock_t *spinlock)
{
sched_note_spinlock(this_task(), spinlock, NOTE_SPINLOCK_UNLOCK);
}
#endif
#ifdef CONFIG_SCHED_INSTRUMENTATION_SYSCALL
void sched_note_syscall_enter(int nr, int argc, ...)
{
struct note_syscall_enter_s note;
FAR struct note_driver_s **driver;
bool formatted = false;
FAR struct tcb_s *tcb = this_task();
unsigned int length = 0;
uintptr_t arg;
va_list ap;
int argc_bak = argc;
int i;
va_start(ap, argc);
for (driver = g_note_drivers; *driver; driver++)
{
va_list copy;
if (!note_isenabled_syscall(*driver, nr))
{
continue;
}
#ifdef CONFIG_SCHED_INSTRUMENTATION_FILTER
if (!((*driver)->filter.mode.flag
& NOTE_FILTER_MODE_FLAG_SYSCALL_ARGS))
{
if (formatted && argc != 0)
{
formatted = false;
}
argc = 0;
}
else
{
if (formatted && argc == 0)
{
formatted = false;
}
argc = argc_bak;
}
#endif
va_copy(copy, ap);
if (note_syscall_enter(*driver, nr, argc, &copy))
{
va_end(copy);
continue;
}
if ((*driver)->ops->add == NULL)
{
va_end(copy);
continue;
}
/* Format the note */
if (!formatted)
{
formatted = true;
length = SIZEOF_NOTE_SYSCALL_ENTER(argc);
note_common(tcb, &note.nsc_cmn, length, NOTE_SYSCALL_ENTER);
DEBUGASSERT(nr <= UCHAR_MAX);
note.nsc_nr = nr;
DEBUGASSERT(argc <= MAX_SYSCALL_ARGS);
note.nsc_argc = argc;
/* If needed, retrieve the given syscall arguments */
for (i = 0; i < argc; i++)
{
arg = (uintptr_t)va_arg(copy, uintptr_t);
note.nsc_args[i] = arg;
}
}
va_end(copy);
/* Add the note to circular buffer */
note_add(*driver, &note, length);
}
va_end(ap);
}
void sched_note_syscall_leave(int nr, uintptr_t result)
{
struct note_syscall_leave_s note;
FAR struct note_driver_s **driver;
bool formatted = false;
FAR struct tcb_s *tcb = this_task();
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled_syscall(*driver, nr))
{
continue;
}
if (note_syscall_leave(*driver, nr, result))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Format the note */
if (!formatted)
{
formatted = true;
note_common(tcb, &note.nsc_cmn,
sizeof(struct note_syscall_leave_s),
NOTE_SYSCALL_LEAVE);
DEBUGASSERT(nr <= UCHAR_MAX);
note.nsc_nr = nr;
note.nsc_result = result;
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(struct note_syscall_leave_s));
}
}
#endif
#ifdef CONFIG_SCHED_INSTRUMENTATION_IRQHANDLER
void sched_note_irqhandler(int irq, FAR void *handler, bool enter)
{
struct note_irqhandler_s note;
FAR struct note_driver_s **driver;
bool formatted = false;
FAR struct tcb_s *tcb = this_task();
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled_irq(*driver, irq, enter))
{
continue;
}
if (note_irqhandler(*driver, irq, handler, enter))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
if (!formatted)
{
formatted = true;
note_common(tcb, &note.nih_cmn, sizeof(struct note_irqhandler_s),
enter ? NOTE_IRQ_ENTER : NOTE_IRQ_LEAVE);
DEBUGASSERT(irq <= UCHAR_MAX);
note.nih_irq = irq;
note.nih_handler = (uintptr_t)handler;
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(struct note_irqhandler_s));
}
}
#endif
#ifdef CONFIG_SCHED_INSTRUMENTATION_WDOG
void sched_note_wdog(uint8_t event, FAR void *handler, FAR const void *arg)
{
FAR struct note_driver_s **driver;
struct note_wdog_s note;
bool formatted = false;
FAR struct tcb_s *tcb = this_task();
for (driver = g_note_drivers; *driver; driver++)
{
if (note_wdog(*driver, event, handler, arg))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
if (!formatted)
{
formatted = true;
note_common(tcb, &note.nwd_cmn, sizeof(note), event);
note.handler = (uintptr_t)handler;
note.arg = (uintptr_t)arg;
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(note));
}
}
#endif
#ifdef CONFIG_SCHED_INSTRUMENTATION_HEAP
void sched_note_heap(uint8_t event, FAR void *heap, FAR void *mem,
size_t size, size_t used)
{
FAR struct note_driver_s **driver;
struct note_heap_s note;
bool formatted = false;
FAR struct tcb_s *tcb = this_task();
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled(*driver))
{
continue;
}
if (note_heap(*driver, event, heap, mem, size, used))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
if (!formatted)
{
formatted = true;
note_common(tcb, &note.nhp_cmn, sizeof(note), event);
note.heap = heap;
note.mem = mem;
note.size = size;
note.used = used;
}
/* Add the note to circular buffer */
note_add(*driver, &note, sizeof(note));
}
}
#endif
#ifdef CONFIG_SCHED_INSTRUMENTATION_DUMP
void sched_note_event_ip(uint32_t tag, uintptr_t ip, uint8_t event,
FAR const void *buf, size_t len)
{
FAR struct note_event_s *note;
FAR struct note_driver_s **driver;
bool formatted = false;
char data[256];
unsigned int length;
FAR struct tcb_s *tcb = this_task();
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled_dump(*driver, tag))
{
continue;
}
if (note_event(*driver, ip, event, buf, len))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Format the note */
if (!formatted)
{
formatted = true;
note = (FAR struct note_event_s *)data;
length = SIZEOF_NOTE_EVENT(len);
if (length > sizeof(data))
{
length = sizeof(data);
}
note_common(tcb, &note->nev_cmn, length, event);
note->nev_ip = ip;
if (buf != NULL)
{
memcpy(note->nev_data, buf, length - SIZEOF_NOTE_EVENT(0));
}
}
/* Add the note to circular buffer */
note_add(*driver, note, length);
}
}
void sched_note_vprintf_ip(uint32_t tag, uintptr_t ip, FAR const char *fmt,
uint32_t type, va_list va)
{
FAR struct note_printf_s *note;
FAR struct note_driver_s **driver;
bool formatted = false;
uint8_t data[256];
size_t length = 0;
FAR struct tcb_s *tcb = this_task();
for (driver = g_note_drivers; *driver; driver++)
{
if (!note_isenabled_dump(*driver, tag))
{
continue;
}
if (note_vprintf(*driver, ip, fmt, va))
{
continue;
}
if ((*driver)->ops->add == NULL)
{
continue;
}
/* Format the note */
if (!formatted)
{
begin_packed_struct union
{
int i;
long l;
#ifdef CONFIG_HAVE_LONG_LONG
long long ll;
#endif
intmax_t im;
size_t sz;
ptrdiff_t ptr;
FAR void *p;
FAR const char *s;
#ifdef CONFIG_HAVE_DOUBLE
double d;
# ifdef CONFIG_HAVE_LONG_DOUBLE
long double ld;
# endif
#endif
}
end_packed_struct *var;
size_t next = 0;
formatted = true;
note = (FAR struct note_printf_s *)data;
length = sizeof(data) - SIZEOF_NOTE_PRINTF(0);
if (type)
{
size_t count = NOTE_PRINTF_GET_COUNT(type);
size_t i;
for (i = 0; i < count; i++)
{
var = (FAR void *)&note->npt_data[next];
switch (NOTE_PRINTF_GET_TYPE(type, i))
{
case NOTE_PRINTF_UINT32:
{
var->i = va_arg(va, int);
if (next + sizeof(var->i) > length)
{
break;
}
next += sizeof(var->i);
}
break;
case NOTE_PRINTF_UINT64:
{
if (next + sizeof(var->ll) > length)
{
break;
}
var->ll = va_arg(va, long long);
next += sizeof(var->ll);
}
break;
case NOTE_PRINTF_STRING:
{
size_t len;
var->s = va_arg(va, FAR const char *);
len = strlen(var->s) + 1;
if (next + len > length)
{
len = length - next;
}
strlcpy(note->npt_data + next, var->s, len);
next += len;
}
break;
case NOTE_PRINTF_DOUBLE:
{
var->d = va_arg(va, double);
if (next + sizeof(var->d) > length)
{
break;
}
next += sizeof(var->d);
}
break;
}
}
}
else
{
FAR const char *p = fmt;
bool infmt = false;
char c;
while ((c = *p++) != '\0')
{
if (c != '%' && !infmt)
{
continue;
}
infmt = true;
var = (FAR void *)&note->npt_data[next];
if (c == 'c' || c == 'd' || c == 'i' || c == 'u' ||
c == 'o' || c == 'x' || c == 'X')
{
if (*(p - 2) == 'j')
{
if (next + sizeof(var->im) > length)
{
break;
}
var->im = va_arg(va, intmax_t);
next += sizeof(var->im);
}
#ifdef CONFIG_HAVE_LONG_LONG
else if (*(p - 2) == 'l' && *(p - 3) == 'l')
{
if (next + sizeof(var->ll) > length)
{
break;
}
var->ll = va_arg(va, long long);
next += sizeof(var->ll);
}
#endif
else if (*(p - 2) == 'l')
{
if (next + sizeof(var->l) > length)
{
break;
}
var->l = va_arg(va, long);
next += sizeof(var->l);
}
else if (*(p - 2) == 'z')
{
if (next + sizeof(var->sz) > length)
{
break;
}
var->sz = va_arg(va, size_t);
next += sizeof(var->sz);
}
else if (*(p - 2) == 't')
{
if (next + sizeof(var->ptr) > length)
{
break;
}
var->ptr = va_arg(va, ptrdiff_t);
next += sizeof(var->ptr);
}
else
{
if (next + sizeof(var->i) > length)
{
break;
}
var->i = va_arg(va, int);
next += sizeof(var->i);
}
infmt = false;
}
else if (c == 'e' || c == 'f' || c == 'g' || c == 'a' ||
c == 'A' || c == 'E' || c == 'F' || c == 'G')
{
#ifdef CONFIG_HAVE_DOUBLE
# ifdef CONFIG_HAVE_LONG_DOUBLE
if (*(p - 2) == 'L')
{
if (next + sizeof(var->ld) > length)
{
break;
}
var->ld = va_arg(va, long double);
next += sizeof(var->ld);
}
else
# endif
{
if (next + sizeof(var->d) > length)
{
break;
}
var->d = va_arg(va, double);
next += sizeof(var->d);
}
#endif
infmt = false;
}
else if (c == '*')
{
var->i = va_arg(va, int);
next += sizeof(var->i);
}
else if (c == 's')
{
size_t len;
var->s = va_arg(va, FAR char *);
len = strlen(var->s) + 1;
if (next + len > length)
{
len = length - next;
}
strlcpy(note->npt_data + next, var->s, len);
next += len;
infmt = false;
}
else if (c == 'p')
{
if (next + sizeof(var->p) > length)
{
break;
}
var->p = va_arg(va, FAR void *);
next += sizeof(var->p);
infmt = false;
}
}
}
length = SIZEOF_NOTE_PRINTF(next);
note_common(tcb, &note->npt_cmn, length, NOTE_DUMP_PRINTF);
note->npt_ip = ip;
note->npt_fmt = fmt;
note->npt_type = type;
}
/* Add the note to circular buffer */
note_add(*driver, note, length);
}
}
void sched_note_printf_ip(uint32_t tag, uintptr_t ip, FAR const char *fmt,
uint32_t type, ...)
{
va_list va;
va_start(va, type);
sched_note_vprintf_ip(tag, ip, fmt, type, va);
va_end(va);
}
#endif /* CONFIG_SCHED_INSTRUMENTATION_DUMP */
#ifdef CONFIG_SCHED_INSTRUMENTATION_FILTER
/****************************************************************************
* Name: sched_note_filter_mode
*
* Description:
* Set and get note filter mode.
* (Same as NOTECTL_GETMODE / NOTECTL_SETMODE ioctls)
*
* Input Parameters:
* oldm - A writable pointer to struct note_filter_mode_s to get current
* filter mode
* If 0, no data is written.
* newm - A read-only pointer to struct note_filter_mode_s which holds the
* new filter mode
* If 0, the filter mode is not updated.
*
* Returned Value:
* None
*
****************************************************************************/
void sched_note_filter_mode(FAR struct note_filter_named_mode_s *oldm,
FAR struct note_filter_named_mode_s *newm)
{
irqstate_t irq_mask;
FAR struct note_driver_s **driver;
irq_mask = spin_lock_irqsave_wo_note(&g_note_lock);
if (oldm != NULL)
{
for (driver = g_note_drivers; *driver; driver++)
{
if (oldm->name[0] == '\0')
{
oldm->mode = (*driver)->filter.mode;
strlcpy(oldm->name, (*driver)->name, NAME_MAX);
break;
}
else if (strcmp((*driver)->name, oldm->name) == 0)
{
oldm->mode = (*driver)->filter.mode;
break;
}
}
}
if (newm != NULL)
{
for (driver = g_note_drivers; *driver; driver++)
{
if (newm->name[0] == '\0')
{
(*driver)->filter.mode = newm->mode;
}
else if (0 == strcmp((*driver)->name, newm->name))
{
(*driver)->filter.mode = newm->mode;
break;
}
}
}
spin_unlock_irqrestore_wo_note(&g_note_lock, irq_mask);
}
/****************************************************************************
* Name: sched_note_filter_syscall
*
* Description:
* Set and get syscall filter setting
* (Same as NOTECTL_GETSYSCALLFILTER / NOTECTL_SETSYSCALLFILTER ioctls)
*
* Input Parameters:
* oldf - A writable pointer to struct note_filter_syscall_s to get
* current syscall filter setting
* If 0, no data is written.
* newf - A read-only pointer to struct note_filter_syscall_s of the
* new syscall filter setting
* If 0, the setting is not updated.
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_SCHED_INSTRUMENTATION_SYSCALL
void sched_note_filter_syscall(FAR struct note_filter_named_syscall_s *oldf,
FAR struct note_filter_named_syscall_s *newf)
{
irqstate_t irq_mask;
FAR struct note_driver_s **driver;
irq_mask = spin_lock_irqsave_wo_note(&g_note_lock);
if (oldf != NULL)
{
for (driver = g_note_drivers; *driver; driver++)
{
if (oldf->name[0] == '\0')
{
oldf->syscall_mask = (*driver)->filter.syscall_mask;
strlcpy(oldf->name, (*driver)->name, NAME_MAX);
break;
}
else if (strcmp((*driver)->name, oldf->name) == 0)
{
oldf->syscall_mask = (*driver)->filter.syscall_mask;
break;
}
}
}
if (newf != NULL)
{
for (driver = g_note_drivers; *driver; driver++)
{
if (newf->name[0] == '\0')
{
(*driver)->filter.syscall_mask = newf->syscall_mask;
}
else if (0 == strcmp((*driver)->name, newf->name))
{
(*driver)->filter.syscall_mask = newf->syscall_mask;
break;
}
}
}
spin_unlock_irqrestore_wo_note(&g_note_lock, irq_mask);
}
#endif
/****************************************************************************
* Name: sched_note_filter_irq
*
* Description:
* Set and get IRQ filter setting
* (Same as NOTECTL_GETIRQFILTER / NOTECTL_SETIRQFILTER ioctls)
*
* Input Parameters:
* oldf - A writable pointer to struct note_filter_irq_s to get
* current IRQ filter setting
* If 0, no data is written.
* newf - A read-only pointer to struct note_filter_irq_s of the new
* IRQ filter setting
* If 0, the setting is not updated.
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_SCHED_INSTRUMENTATION_IRQHANDLER
void sched_note_filter_irq(FAR struct note_filter_named_irq_s *oldf,
FAR struct note_filter_named_irq_s *newf)
{
irqstate_t irq_mask;
FAR struct note_driver_s **driver;
irq_mask = spin_lock_irqsave_wo_note(&g_note_lock);
if (oldf != NULL)
{
for (driver = g_note_drivers; *driver; driver++)
{
if (oldf->name[0] == '\0')
{
oldf->irq_mask = (*driver)->filter.irq_mask;
strlcpy(oldf->name, (*driver)->name, NAME_MAX);
break;
}
else if (strcmp((*driver)->name, oldf->name) == 0)
{
oldf->irq_mask = (*driver)->filter.irq_mask;
break;
}
}
}
if (newf != NULL)
{
for (driver = g_note_drivers; *driver; driver++)
{
if (newf->name[0] == '\0')
{
(*driver)->filter.irq_mask = newf->irq_mask;
}
else if (0 == strcmp((*driver)->name, newf->name))
{
(*driver)->filter.irq_mask = newf->irq_mask;
break;
}
}
}
spin_unlock_irqrestore_wo_note(&g_note_lock, irq_mask);
}
#endif
/****************************************************************************
* Name: sched_note_filter_tag
*
* Description:
* Set and get tag filter setting
* (Same as NOTECTL_GETDUMPFILTER / NOTECTL_SETDUMPFILTER ioctls)
*
* Input Parameters:
* oldf - A writable pointer to struct note_filter_tag_s to get
* current dump filter setting
* If 0, no data is written.
* newf - A read-only pointer to struct note_filter_tag_s of the
* new dump filter setting
* If 0, the setting is not updated.
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_SCHED_INSTRUMENTATION_DUMP
void sched_note_filter_tag(FAR struct note_filter_named_tag_s *oldf,
FAR struct note_filter_named_tag_s *newf)
{
irqstate_t falgs;
FAR struct note_driver_s **driver;
falgs = spin_lock_irqsave_wo_note(&g_note_lock);
if (oldf != NULL)
{
for (driver = g_note_drivers; *driver; driver++)
{
if (oldf->name[0] == '\0')
{
oldf->tag_mask = (*driver)->filter.tag_mask;
strlcpy(oldf->name, (*driver)->name, NAME_MAX);
break;
}
else if (strcmp((*driver)->name, oldf->name) == 0)
{
oldf->tag_mask = (*driver)->filter.tag_mask;
break;
}
}
}
if (newf != NULL)
{
for (driver = g_note_drivers; *driver; driver++)
{
if (newf->name[0] == '\0')
{
(*driver)->filter.tag_mask = newf->tag_mask;
}
else if (0 == strcmp((*driver)->name, newf->name))
{
(*driver)->filter.tag_mask = newf->tag_mask;
break;
}
}
}
spin_unlock_irqrestore_wo_note(&g_note_lock, falgs);
}
#endif
#endif /* CONFIG_SCHED_INSTRUMENTATION_FILTER */
#if CONFIG_DRIVERS_NOTE_TASKNAME_BUFSIZE > 0
/****************************************************************************
* Name: note_get_taskname
*
* Description:
* Get the task name string of the specified PID
*
* Input Parameters:
* PID - Task ID
*
* Returned Value:
* Retrun name if task name can be retrieved, otherwise NULL
****************************************************************************/
FAR const char *note_get_taskname(pid_t pid)
{
FAR struct note_taskname_info_s *ti;
FAR struct tcb_s *tcb;
UNUSED(ti);
tcb = nxsched_get_tcb(pid);
if (tcb != NULL)
{
return tcb->name;
}
#ifdef CONFIG_SCHED_INSTRUMENTATION_SWITCH
ti = note_find_taskname(pid);
if (ti != NULL)
{
return ti->name;
}
return NULL;
#else
return "unknown";
#endif
}
#endif
/****************************************************************************
* Name: note_driver_register
****************************************************************************/
int note_driver_register(FAR struct note_driver_s *driver)
{
int i;
DEBUGASSERT(driver);
for (i = 0; i < CONFIG_DRIVERS_NOTE_MAX; i++)
{
if (g_note_drivers[i] == NULL)
{
g_note_drivers[i] = driver;
return OK;
}
}
return -ENOMEM;
}
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