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Debug: freertos gdb plugin.

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Aleksandr Kutuzov 2020-10-17 16:34:16 +03:00
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107
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# File: FreeRTOS.py
# Author: Carl Allendorph
# Date: 05NOV2014
#
# Description:
# This file contains some python code that utilizes the GDB API
# to inspect information about the FreeRTOS internal state. The
# idea is to provide the user with the ability to inspect information
# about the tasks, queues, mutexs, etc.
#
from os import path
import sys
directory, file = path.split(__file__)
directory = path.expanduser(directory)
directory = path.abspath(directory)
sys.path.append(directory)
import gdb
import pprint
from FreeRTOSgdb.Types import StdTypes
from FreeRTOSgdb.List import ListInspector
from FreeRTOSgdb.GDBCommands import ShowHandleName, ShowRegistry, ShowList
from FreeRTOSgdb.GDBCommands import ShowQueueInfo
class Scheduler:
def __init__(self):
self._blocked = ListInspector("xSuspendedTaskList")
self._delayed1 = ListInspector("xDelayedTaskList1")
self._delayed2 = ListInspector("xDelayedTaskList2")
self._readyLists = []
readyTasksListsStr = "pxReadyTasksLists"
readyListsSym, methodType = gdb.lookup_symbol(readyTasksListsStr)
if readyListsSym != None:
readyLists = readyListsSym.value()
minIndex, maxIndex = readyLists.type.range()
for i in range(minIndex, maxIndex + 1):
readyList = readyLists[i]
FRReadyList = ListInspector(readyList)
self._readyLists.append(FRReadyList)
else:
print("Failed to Find Symbol: %s" % readyTasksListsStr)
raise ValueError("Invalid Symbol!")
def ShowTaskList(self):
self.PrintTableHeader()
for i, rlist in enumerate(self._readyLists):
if i == 0:
items = rlist.GetElements("TCB_t", 0)
else:
items = rlist.GetElements("TCB_t", 1)
if len(items) > 0:
print("Ready List {%d}: Num Tasks: %d" % (i, len(items)))
for tcb, val in items:
self.PrintTaskFormatted(tcb)
items = self._blocked.GetElements("TCB_t")
print("Blocked List: Num Tasks: %d" % len(items))
for tcb, val in items:
self.PrintTaskFormatted(tcb)
items = self._delayed1.GetElements("TCB_t")
print("Delayed {1}: Num Tasks: %d" % len(items))
for tcb, val in items:
self.PrintTaskFormatted(tcb, val)
items = self._delayed2.GetElements("TCB_t")
print("Delayed {2}: Num Tasks: %d" % len(items))
for tcb, val in items:
self.PrintTaskFormatted(tcb, val)
def PrintTableHeader(self):
print("%16s %3s %4s" % ("Name", "PRI", "STCK"))
def PrintTaskFormatted(self, task, itemVal=None):
topStack = task["pxTopOfStack"]
stackBase = task["pxStack"]
highWater = topStack - stackBase
taskName = task["pcTaskName"].string()
taskPriority = task["uxPriority"]
if itemVal != None:
print("%16s %3s %4s %5s" % (taskName, taskPriority, highWater, itemVal))
else:
print("%16s %3s %4s" % (taskName, taskPriority, highWater))
class ShowTaskList(gdb.Command):
"""Generate a print out of the current tasks and their states."""
def __init__(self):
super(ShowTaskList, self).__init__("show Task-List", gdb.COMMAND_SUPPORT)
def invoke(self, arg, from_tty):
sched = Scheduler()
sched.ShowTaskList()
ShowRegistry()
ShowList()
ShowTaskList()
ShowHandleName()
ShowQueueInfo()

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debug/FreeRTOS/FreeRTOSgdb/EventGroup.py Normal file
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# File: EventGroup.py
# Author: Carl Allendorph
# Date: 05NOV2014
#
# Description:
# This file contains the implementation of a Event Group Inspector
import gdb
from .List import ListInspector
from .Task import TaskInspector
class EventGroupInspector:
EvtGrpType = gdb.lookup_type("EventGroup_t")
def __init__(self, handle):
""""""
self._evtgrp = gdb.Value(handle).cast(EventGroupInspector.EvtGrpType)
def GetTasksWaiting(self):
""""""
taskListObj = self._evtgrp["xTasksWaitingForBits"]
taskList = ListInspector(taskListObj)
return taskList.GetElements(TaskInspector.TCBType)
def GetEventBits(self):
"""Get the Event Flag Bits
@return L{gdb.Value} of EventBits_t
"""
return self._evtgrp["uxEventBits"]

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debug/FreeRTOS/FreeRTOSgdb/GDBCommands.py Normal file
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# File: GDBCommands.py
# Author: Carl Allendorph
# Date: 05NOV2014
#
# Description:
# This file contains the implementation of some custom
# GDB commands for Inspecting the FreeRTOS state
import gdb
from .List import ListInspector
from .Task import TaskInspector
from .HandleRegistry import HandleRegistry
from .QueueTools import *
class ShowQueueInfo(gdb.Command):
"""Generate a print out of info about a particular
set of queues.
"""
def __init__(self):
super(ShowQueueInfo, self).__init__("show Queue-Info", gdb.COMMAND_SUPPORT)
def invoke(self, arg, from_tty):
argv = gdb.string_to_argv(arg)
qTypes = []
if len(argv) > 0:
for a in argv:
try:
qType = QueueMode.Map[a]
qTypes.append(qType)
except KeyError:
print("Arg %s does not map to a Queue Type!" % a)
reg = HandleRegistry()
qToShow = []
if len(qTypes) > 0:
# We will only print info about queues
for qType in qTypes:
qObjs = reg.FilterBy(qType)
qToShow.extend(qObjs)
else:
qToShow = reg.FilterBy(None)
print("Num Queues: %d" % len(qToShow))
print("%20s %4s %16s %16s" % ("NAME", "CNT", "SEND", "RECEIVE"))
for q in qToShow:
self.PrintQueueInfo(q)
def PrintQueueInfo(self, q):
"""Print Info about the Queue"""
sendList = q.GetTasksWaitingToSend()
rxList = q.GetTasksWaitingToReceive()
# print("TxLen: %d, RxLen: %d" % (len(sendList), len(rxList)))
maxCount = max(len(sendList), len(rxList))
outputFmt = "%20s %4s %16s %16s"
if maxCount == 0:
print(outputFmt % (q.GetName(), q.GetQueueMessagesWaiting(), "", ""))
else:
for i in range(0, maxCount):
txName = ""
if i < len(sendList):
tcbRef, val = sendList[i]
tcb = TaskInspector(tcbRef)
txName = tcb.GetName()
rxName = ""
if i < len(rxList):
tcbRef, val = rxList[i]
tcb = TaskInspector(tcbRef)
rxName = tcb.GetName()
if i == 0:
print(
outputFmt
% (q.GetName(), q.GetQueueMessagesWaiting(), txName, rxName)
)
else:
print(outputFmt % ("", "", txName, rxName))
class ShowHandleName(gdb.Command):
"""Generate a print out of the handle by name"""
def __init__(self):
super(ShowHandleName, self).__init__("show Handle-Name", gdb.COMMAND_SUPPORT)
def invoke(self, arg, from_tty):
argv = gdb.string_to_argv(arg)
if len(argv) != 1:
print("Invalid Argument: Requires one handle arg")
handle = int(argv[0], 0)
reg = HandleRegistry()
name = reg.GetName(handle)
print("Handle 0x%08x: %s" % (handle, name))
class ShowRegistry(gdb.Command):
"""Generate a print out of the queue handle registry"""
def __init__(self):
super(ShowRegistry, self).__init__("show Handle-Registry", gdb.COMMAND_SUPPORT)
def invoke(self, arg, from_tty):
reg = HandleRegistry()
reg.PrintRegistry()
class ShowList(gdb.Command):
"""Generate a print out of the elements in a list
passed to this command. User must pass a symbol that
will be looked up.
"""
def __init__(self):
super(ShowList, self).__init__(
"show List-Handle", gdb.COMMAND_SUPPORT, gdb.COMPLETE_SYMBOL
)
def invoke(self, arg, from_tty):
argv = gdb.string_to_argv(arg)
CastTypeStr = None
if len(argv) > 0:
symbolArg = argv[0]
if len(argv) > 1:
CastTypeStr = argv[1]
listVal = ListInspector(symbolArg)
elems = listVal.GetElements(CastTypeStr)
for elem in elems:
print("Elem: %s" % str(elem))

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# File: HandleRegistry.py
# Author: Carl Allendorph
# Date: 06NOV2014
#
# Description:
# THis file contains the implementation of a class for accessing the
# handle registry. This contains a mapping of queue handles to
# strings for labeling purposes.
import gdb
from .Types import StdTypes
from .QueueTools import *
class HandleRegistry:
"""The FreeRTOS system can be configured with a table that
associates a name with a QueueHandle_t.
This class can be used to access this table and
label queue/mutex/semaphore/event groups
"""
def __init__(self, regSymbol="xQueueRegistry"):
symbol, methodObj = gdb.lookup_symbol(regSymbol)
self._registry = symbol.value()
self._minIndex = 0
self._maxIndex = 0
self._minIndex, self._maxIndex = self._registry.type.range()
def GetName(self, handle):
"""Find the string name associated with a queue
handle if it exists in the registry
"""
for i in range(self._minIndex, self._maxIndex):
elem = self._registry[i]
h = elem["xHandle"]
val = h.cast(StdTypes.uint32_t)
if handle == val:
print("Found Entry for: %x" % handle)
name = elem["pcQueueName"].string()
return name
def PrintRegistry(self):
for i in range(self._minIndex, self._maxIndex):
elem = self._registry[i]
h = elem["xHandle"]
if h != 0:
name = elem["pcQueueName"].string()
print("%d: %3s %16s" % (i, h, name))
def FilterBy(self, qMode):
"""Retrieve a List of Mutex Queue Handles"""
resp = []
for i in range(self._minIndex, self._maxIndex):
elem = self._registry[i]
h = elem["xHandle"]
if h != 0:
name = elem["pcQueueName"].string()
q = QueueInspector(h)
q.SetName(name)
if qMode != None:
qType = q.GetQueueType()
if qType != None:
if qType == qMode:
resp.append(q)
else:
print("qType == None")
else:
resp.append(q)
return resp
def GetMutexes(self):
"""Retrieve all the Mutex Objects in the Handle Registry"""
return self.FilterBy(QueueMode.MUTEX)
def GetSemaphores(self):
"""Retrieve all the Semaphore Objects in the Handle Registry"""
return self.FilterBy(QueueMode.BINARY)
def GetQueues(self):
"""Retrieve all the Queue Objects in the Handle Registry"""
return self.FilterBy(QueueMode.QUEUE)

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# File: List.py
# Author: Carl Allendorph
# Date: 05NOV2014
#
# Description:
# This file contains the class for inspecting
# a FreeRTOS List Object
#
import gdb
from .Types import StdTypes
class ListInspector:
"""FreeRTOS List Inspector Object"""
ListType = gdb.lookup_type("List_t")
def __init__(self, handle):
""""""
self._list = None
# print("List: Handle: %s" % handle)
self.Assign(handle)
def Assign(self, listObj):
try:
if listObj.type == ListInspector.ListType:
self._list = listObj
return
else:
raise TypeError("Invalid List Object Type!")
except Exception as exc:
# print(" Failed to assign from List object: %s" % str(exc))
pass
symbol, methodObj = gdb.lookup_symbol(listObj)
if symbol != None:
self._list = symbol.value()
else:
addrInt = int(listObj, 0)
listObjPtr = gdb.Value(addrInt).cast(ListInspector.ListType.pointer())
self._list = listObjPtr.dereference()
def GetElements(self, CastTypeStr=None, startElem=1):
"""Get the Elements of the list as an array of
gdb.Value type objects.
@param CastTypeStr string name of the type of object that
we will cast the void *pvOwner elements of the list to.
User can also pass a L{gdb.Type} object as the type
If None, we will simply cast to uint32_t and print these
as hex values.
@param startElem This is a flag to indicate whether
we will start getting elements starting at 0 or 1. Note
that this is to deal with some non-consistent behavior
of some of the TCB Task lists.
"""
if self._list != None:
CastType = None
if CastTypeStr != None:
if type(CastTypeStr) == str:
try:
CastType = gdb.lookup_type(CastTypeStr).pointer()
except:
print("Failed to find type: %s" % CastTypeStr)
elif type(CastTypeStr) == gdb.Type:
CastType = CastTypeStr.pointer()
resp = []
numElems = self._list["uxNumberOfItems"]
# print("List Elements: %d" % numElems)
index = self._list["pxIndex"]
if numElems > 0 and numElems < 200:
if startElem == 0:
curr = index
else:
curr = index["pxPrevious"]
for i in range(0, numElems):
owner = curr["pvOwner"]
ownerObj = None
if CastType != None:
castObjPtr = owner.cast(CastType)
castObj = castObjPtr.dereference()
ownerObj = castObj
else:
ownerUInt = owner.cast(StdTypes.uint32_t)
ownerObj = ownerUInt
itemVal = curr["xItemValue"]
resp.append((ownerObj, itemVal.cast(StdTypes.uint32_t)))
curr = curr["pxPrevious"]
return resp
else:
raise ValueError("Invalid List Object - Possibly Failed to Initialize!")

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# File: Queue.py
# Author: Carl Allendorph
# Date: 05NOV2014
#
# Description:
# This file contains the implementation of a Queue Inspector
# class.
#
import gdb
from .List import ListInspector
from .Task import TaskInspector
class QueueMode:
QUEUE = 0
MUTEX = 1
COUNTING = 2
BINARY = 3
RECURSIVE = 4
Map = None
@staticmethod
def IsValid(qType):
if (
qType == QueueMode.QUEUE
or qType == QueueMode.MUTEX
or qType == QueueMode.COUNTING
or qType == QueueMode.BINARY
or qType == QueueMode.RECURSIVE
):
return True
else:
return False
QueueMap = {
"mutex": QueueMode.MUTEX,
"queue": QueueMode.QUEUE,
"semaphore": QueueMode.BINARY,
"counting": QueueMode.COUNTING,
"recursive": QueueMode.RECURSIVE,
}
QueueMode.Map = QueueMap
class QueueInspector:
QueueType = gdb.lookup_type("Queue_t")
def __init__(self, handle):
""""""
# print("Queue: Handle: %s" % handle)
self.name = None
queueObjPtr = None
if type(handle) == gdb.Value:
queueObjPtr = handle.cast(QueueInspector.QueueType.pointer())
self._queue = queueObjPtr.dereference()
else:
queueObjPtr = gdb.Value(handle).cast(QueueInspector.QueueType.pointer())
self._queue = queueObjPtr.dereference()
def GetName(self):
return self.name
def SetName(self, name):
self.name = name
def GetTasksWaitingToSend(self):
"""Retrieve a list of gdb.Value objects of type
TCB that are the tasks that are currently waiting to
send data on this queue object.
"""
sendList = ListInspector(self._queue["xTasksWaitingToSend"])
return sendList.GetElements(TaskInspector.TCBType)
def GetTasksWaitingToReceive(self):
"""Retrieve a list of gdb.Value objects of Type
TCB that are the tasks that are currently waiting to
receive data on this queue object.
"""
rxList = ListInspector(self._queue["xTasksWaitingToReceive"])
return rxList.GetElements(TaskInspector.TCBType)
def GetQueueMessagesWaiting(self):
"""Return the number of messages waiting as a
L{gdb.Value} object
"""
return self._queue["uxMessagesWaiting"]
def GetQueueType(self):
"""Return the Type of the Queue as a enumerated number"""
try:
qType = self._queue["ucQueueType"]
if QueueMode.IsValid(int(qType)):
return qType
else:
raise ValueError(
"Invalid Queue Type In Queue Object! Are you sure this is a Queue Handle?"
)
except Exception as exc:
# If the TRACE functionality of the RTOS is not enabled,
# then the queue type will not be availabe in the queue
# handle - so we return None
print("Failed to get Type: %s" % str(exc))
return None

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# File: Task.py
# Author: Carl Allendorph
# Date: 05NOV2014
#
# Description:
# This file contains the implementation of a class to use for
# inspecting the state of a FreeRTOS Task in GDB
#
import gdb
class TaskInspector:
TCBType = gdb.lookup_type("TCB_t")
def __init__(self, handle):
self._tcb = None
# print("Task: Pass Handle: %s" % str(handle))
try:
if handle.type == TaskInspector.TCBType:
self._tcb = handle
return
else:
print("Handle Type: %s" % str(handle.type))
except AttributeError as aexc:
print("Attribute Error: %s" % str(aexc))
pass
except Exception as exc:
print("Error Initializing Task Inspector: %s" % str(exc))
raise
try:
tcbPtr = gdb.Value(handle).cast(TaskInspector.TCBType.pointer())
self._tcb = tcbPtr.dereference()
return
except Exception as exc:
print("Failed to convert Handle Pointer: %s" % str(handle))
self._tcb = handle
def GetName(self):
if self._tcb != None:
return self._tcb["pcTaskName"].string()
else:
raise ValueError("Invalid TCB")
def GetPriority(self):
if self._tcb != None:
return self._tcb["uxPriority"]
else:
raise ValueError("Invalid TCB")
def GetStackMargin(self):
if self._tcb != None:
topStack = self._tcb["pxTopOfStack"]
stackBase = self._tcb["pxStack"]
highWater = topStack - stackBase
return highWater
else:
raise ValueError("Invalid TCB")

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# File: Types.py
# Author: Carl Allendorph
# Date: 05NOV2014
#
# Description:
# This file contains the implementation of some
# standard types
import gdb
class StdTypes:
uint32_t = gdb.lookup_type("uint32_t")
uint16_t = gdb.lookup_type("uint16_t")

0
debug/FreeRTOS/FreeRTOSgdb/__init__.py Normal file
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
{description}
Copyright (C) {year} {fullname}
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
{signature of Ty Coon}, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

120
debug/FreeRTOS/README.md Normal file
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@ -0,0 +1,120 @@
FreeRTOS-GDB
============
Python API Library for inspecting FreeRTOS Objects in GDB
Basically, the FreeRTOS internal state is kind of hard to inspect
when working with GDB. This project provides some scripts for GDB's
Python API that make accessing some of these internals a little easier
to inspect.
##Requirements:
1. You need to have the python API enabled in your version of GDB. This is a
compile time option when building GDB. You should be able to do something
like this:
```
gdb> python print "Hello World"
```
and get predictable results. If it throws an error - then you don't have
python compiled in your version of GDB.
2. Need to be using FreeRTOS 8.0+. This code could probably be used with FreeRTOS
version 7.0 or previous versions, but the current code doesn't support it.
3. You need to use the Handle Registry for Queue info to be any use.
Note that this only works for Queue based objects and not
for EventGroups
4. You need to put the FreeRTOS-GDB/src directory on your python path:
```
$> export PYTHONPATH=~/src/FreeRTOS-GDB/src/
```
How To Use:
```
$> gdb ./bin/program.elf
(gdb) c
Program runs on embedded device, sets up tasks, and queues
<Break>
(gdb) source ~/FreeRTOS-GDB/src/FreeRTOS.py
(gdb) show Task-List
Name PRI STCK
Ready List {0}: Num Tasks: 1
IDLE 0 107
Blocked List: Num Tasks: 11
EMAC Task 1 239
AFEC0 Task 1 295
LDSENS Task 1 195
AFEC1 Task 1 295
LineSample Task 1 281
DMAUART0 1 225
Log Task 1 273
BAT Task 1 169
Rx Task 1 421
Mng Task 2 551
Cell Task 1 275
Delayed {1}: Num Tasks: 5
Tmr Svc 3 355 62254
WLAN Task 1 205 13817
Init Task 1 445 10015
LED Task 1 179 7105
DMACOM1 1 265 7065
Delayed {2}: Num Tasks: 0
(gdb) show Queue-Info mutex
Num Queues: 6
NAME CNT SEND RECEIVE
LOG:LOCK 1 NONE NONE
STREAM:LOCK 1 NONE NONE
TWI:MUTEX 1 NONE NONE
CC3000:LOCK 1 NONE NONE
WLAN:LOCK 0 NONE NONE
SPI:LOCK 1 NONE NONE
(gdb) show Queue-Info queue
Num Queues: 14
NAME CNT SEND RECEIVE
TmrQ 0 Tmr Svc
LOG:MSGPOOL 12 NONE NONE
LOG:MSGQ 0 Log Task
TWI:QUEUE 0 NONE NONE
SPI:QUEUE 0 NONE NONE
DMAAFEC:POOL 1 NONE NONE
DMAAFEC:QUEUE 0 AFEC0 Task
DMAAFEC:POOL 1 NONE NONE
DMAAFEC:QUEUE 0 AFEC1 Task
COM:TXPOOL 3 NONE NONE
COM:TXQ 0 NONE NONE
COM:RXPOOL 5 NONE NONE
COM:RXQ 0 NONE NONE
FATFS:MUTEX 0 NONE NONE
```
@note - the NONE's above may just be empty strings.
This code adds the following custom GDB commands:
* show List-Handle (symbol|address) [CastType]
CastType is an optional argument that will cast all of the
handles in a list to a particular type.
* show Task-List
* show Handle-Registry
* show Handle-Name (symbole|address)
* show Queue-Info [filter]
filter can be "queue","mutex","semaphore", "counting", "recursive"
@TODO
=====
* With GDB's Python API - it doesn't seem to handle code is separate
files very well.
* Currently, the EventGroup objects don't have an inspector.
Work in progress - ideal solution would likely modify the struct
of the Event Group to provide a similar piece of info that the
Queue handle does so that we could use the same registry.

1
make/rules.mk
View file

@ -71,6 +71,7 @@ debug: flash
arm-none-eabi-gdb-py \
-ex "target extended-remote 127.0.0.1:4242" \
-ex "set confirm off" \
-ex "source ../debug/FreeRTOS/FreeRTOS.py" \
$(OBJ_DIR)/$(PROJECT).elf; \
kill `cat $(OBJ_DIR)/st-util.PID`; \
rm $(OBJ_DIR)/st-util.PID