OVMS3-idf/tools/esp_app_trace/espytrace/apptrace.py

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import os
try:
from urlparse import urlparse
except ImportError:
from urllib.parse import urlparse
try:
import SocketServer
except ImportError:
import socketserver as SocketServer
import threading
import tempfile
import time
import subprocess
import os.path
import elftools.elf.elffile as elffile
import elftools.elf.constants as elfconst
def addr2line(toolchain, elf_path, addr):
"""
Creates trace reader.
Parameters
----------
toolchain : string
toolchain prefix to retrieve source line locations using addresses
elf_path : string
path to ELF file to use
addr : int
address to retrieve source line location
Returns
-------
string
source line location string
"""
try:
return subprocess.check_output(['%saddr2line' % toolchain, '-e', elf_path, '0x%x' % addr]).decode("utf-8")
except subprocess.CalledProcessError:
return ''
class ParseError(RuntimeError):
"""
Parse error exception
"""
def __init__(self, message):
RuntimeError.__init__(self, message)
class ReaderError(RuntimeError):
"""
Trace reader error exception
"""
def __init__(self, message):
RuntimeError.__init__(self, message)
class ReaderTimeoutError(ReaderError):
"""
Trace reader timeout error
"""
def __init__(self, tmo, sz):
ReaderError.__init__(self, 'Timeout %f sec while reading %d bytes!' % (tmo, sz))
class ReaderShutdownRequest(ReaderError):
"""
Trace reader shutdown request error
Raised when user presses CTRL+C (SIGINT).
"""
def __init__(self):
ReaderError.__init__(self, 'Shutdown request!')
class Reader:
"""
Base abstract reader class
"""
def __init__(self, tmo):
"""
Constructor
Parameters
----------
tmo : int
read timeout
"""
self.timeout = tmo
self.need_stop = False
def read(self, sz):
"""
Reads a number of bytes
Parameters
----------
sz : int
number of bytes to read
Returns
-------
bytes object
read bytes
Returns
-------
ReaderTimeoutError
if timeout expires
ReaderShutdownRequest
if SIGINT was received during reading
"""
pass
def readline(self):
"""
Reads line
Parameters
----------
sz : int
number of bytes to read
Returns
-------
string
read line
"""
pass
def forward(self, sz):
"""
Moves read pointer to a number of bytes
Parameters
----------
sz : int
number of bytes to read
"""
pass
def cleanup(self):
"""
Cleans up reader
"""
self.need_stop = True
class FileReader(Reader):
"""
File reader class
"""
def __init__(self, path, tmo):
"""
Constructor
Parameters
----------
path : string
path to file to read
tmo : int
see Reader.__init__()
"""
Reader.__init__(self, tmo)
self.trace_file_path = path
self.trace_file = open(path, 'rb')
def read(self, sz):
"""
see Reader.read()
"""
data = b''
start_tm = time.clock()
while not self.need_stop:
data += self.trace_file.read(sz - len(data))
if len(data) == sz:
break
if self.timeout != -1 and time.clock() >= start_tm + self.timeout:
raise ReaderTimeoutError(self.timeout, sz)
if self.need_stop:
raise ReaderShutdownRequest()
return data
def get_pos(self):
"""
Retrieves current file read position
Returns
-------
int
read position
"""
return self.trace_file.tell()
def readline(self, linesep=os.linesep):
"""
see Reader.read()
"""
line = ''
start_tm = time.clock()
while not self.need_stop:
line += self.trace_file.readline().decode("utf-8")
if line.endswith(linesep):
break
if self.timeout != -1 and time.clock() >= start_tm + self.timeout:
raise ReaderTimeoutError(self.timeout, 1)
if self.need_stop:
raise ReaderShutdownRequest()
return line
def forward(self, sz):
"""
see Reader.read()
"""
cur_pos = self.trace_file.tell()
start_tm = time.clock()
while not self.need_stop:
file_sz = os.path.getsize(self.trace_file_path)
if file_sz - cur_pos >= sz:
break
if self.timeout != -1 and time.clock() >= start_tm + self.timeout:
raise ReaderTimeoutError(self.timeout, sz)
if self.need_stop:
raise ReaderShutdownRequest()
self.trace_file.seek(sz, os.SEEK_CUR)
class NetRequestHandler:
"""
Handler for incoming network requests (connections, datagrams)
"""
def handle(self):
while not self.server.need_stop:
data = self.rfile.read(1024)
if len(data) == 0:
break
self.server.wtrace.write(data)
self.server.wtrace.flush()
class NetReader(FileReader):
"""
Base netwoek socket reader class
"""
def __init__(self, tmo):
"""
see Reader.__init__()
"""
fhnd,fname = tempfile.mkstemp()
FileReader.__init__(self, fname, tmo)
self.wtrace = os.fdopen(fhnd, 'wb')
self.server_thread = threading.Thread(target=self.serve_forever)
self.server_thread.start()
def cleanup(self):
"""
see Reader.cleanup()
"""
FileReader.cleanup(self)
self.shutdown()
self.server_close()
self.server_thread.join()
time.sleep(0.1)
self.trace_file.close()
self.wtrace.close()
class TCPRequestHandler(NetRequestHandler, SocketServer.StreamRequestHandler):
"""
Handler for incoming TCP connections
"""
pass
class TCPReader(NetReader, SocketServer.TCPServer):
"""
TCP socket reader class
"""
def __init__(self, host, port, tmo):
"""
Constructor
Parameters
----------
host : string
see SocketServer.BaseServer.__init__()
port : int
see SocketServer.BaseServer.__init__()
tmo : int
see Reader.__init__()
"""
SocketServer.TCPServer.__init__(self, (host, port), TCPRequestHandler)
NetReader.__init__(self, tmo)
class UDPRequestHandler(NetRequestHandler, SocketServer.DatagramRequestHandler):
"""
Handler for incoming UDP datagrams
"""
pass
class UDPReader(NetReader, SocketServer.UDPServer):
"""
UDP socket reader class
"""
def __init__(self, host, port, tmo):
"""
Constructor
Parameters
----------
host : string
see SocketServer.BaseServer.__init__()
port : int
see SocketServer.BaseServer.__init__()
tmo : int
see Reader.__init__()
"""
SocketServer.UDPServer.__init__(self, (host, port), UDPRequestHandler)
NetReader.__init__(self, tmo)
def reader_create(trc_src, tmo):
"""
Creates trace reader.
Parameters
----------
trc_src : string
trace source URL. Supports 'file:///path/to/file' or (tcp|udp)://host:port
tmo : int
read timeout
Returns
-------
Reader
reader object or None if URL scheme is not supported
"""
url = urlparse(trc_src)
if len(url.scheme) == 0 or url.scheme == 'file':
if os.name == 'nt':
# workaround for Windows path
return FileReader(trc_src[7:], tmo)
else:
return FileReader(url.path, tmo)
if url.scheme == 'tcp':
return TCPReader(url.hostname, url.port, tmo)
if url.scheme == 'udp':
return UDPReader(url.hostname, url.port, tmo)
return None
class TraceDataProcessor:
"""
Base abstract class for all trace data processors.
"""
def __init__(self, print_events, keep_all_events=False):
"""
Constructor.
Parameters
----------
print_events : bool
if True every event will be printed as they arrive
keep_all_events : bool
if True all events will be kept in self.events in the order they arrive
"""
self.print_events = print_events
self.keep_all_events = keep_all_events
self.total_events = 0
self.events = []
# This can be changed by the root procesor that includes several sub-processors.
# It is used access some method of root processor which can contain methods/data common for all sub-processors.
# Common info could be current execution context, info about running tasks, available IRQs etc.
self.root_proc = self
def _print_event(self, event):
"""
Base method to print an event.
Parameters
----------
event : object
Event object
"""
print("EVENT[{:d}]: {}".format(self.total_events, event))
def print_report(self):
"""
Base method to print report.
"""
print("Processed {:d} events".format(self.total_events))
def cleanup(self):
"""
Base method to make cleanups.
"""
pass
def on_new_event(self, event):
"""
Base method to process event.
"""
if self.print_events:
self._print_event(event)
if self.keep_all_events:
self.events.append(event)
self.total_events += 1
class LogTraceParseError(ParseError):
"""
Log trace parse error exception.
"""
pass
def get_str_from_elf(felf, str_addr):
"""
Retrieves string from ELF file.
Parameters
----------
felf : elffile.ELFFile
open ELF file handle to retrive format string from
str_addr : int
address of the string
Returns
-------
string
string or None if it was not found
"""
tgt_str = ''
for sect in felf.iter_sections():
if sect['sh_addr'] == 0 or (sect['sh_flags'] & elfconst.SH_FLAGS.SHF_ALLOC) == 0:
continue
if str_addr < sect['sh_addr'] or str_addr >= sect['sh_addr'] + sect['sh_size']:
continue
sec_data = sect.data()
for i in range(str_addr - sect['sh_addr'], sect['sh_size']):
if type(sec_data) is str:
ch = sec_data[i]
else:
ch = str(chr(sec_data[i]))
if ch == '\0':
break
tgt_str += ch
if len(tgt_str) > 0:
return tgt_str
return None
class LogTraceEvent:
"""
Log trace event.
"""
def __init__(self, fmt_addr, log_args):
"""
Constructor.
Parameters
----------
fmt_addr : int
address of the format string
log_args : list
list of log message arguments
"""
self.fmt_addr = fmt_addr
self.args = log_args
def get_message(self, felf):
"""
Retrieves log message.
Parameters
----------
felf : elffile.ELFFile
open ELF file handle to retrive format string from
Returns
-------
string
formatted log message
Raises
------
LogTraceParseError
if format string has not been found in ELF file
"""
fmt_str = get_str_from_elf(felf, self.fmt_addr)
if not fmt_str:
raise LogTraceParseError('Failed to find format string for 0x%x' % self.fmt_addr)
prcnt_idx = 0
for i, arg in enumerate(self.args):
prcnt_idx = fmt_str.find('%', prcnt_idx, -2) # TODO: check str ending with %
if prcnt_idx == -1:
break
prcnt_idx += 1 # goto next char
if fmt_str[prcnt_idx] == 's':
# find string
arg_str = get_str_from_elf(felf, self.args[i])
if arg_str:
self.args[i] = arg_str
else:
self.args[i] = '<None>'
fmt_str = fmt_str.replace('%p', '%x')
return fmt_str % tuple(self.args)
class BaseLogTraceDataProcessorImpl:
"""
Base implementation for log data processors.
"""
def __init__(self, print_log_events=False, elf_path=''):
"""
Constructor.
Parameters
----------
print_log_events : bool
if True every log event will be printed as they arrive
elf_path : string
path to ELF file to retrieve format strings for log messages
"""
if len(elf_path):
self.felf = elffile.ELFFile(open(elf_path, 'rb'))
else:
self.felf = None
self.print_log_events = print_log_events
self.messages = []
def cleanup(self):
"""
Cleanup
"""
if self.felf:
self.felf.stream.close()
def print_report(self):
"""
Prints log report
"""
print("=============== LOG TRACE REPORT ===============")
print("Processed {:d} log messages.".format(len(self.messages)))
def on_new_event(self, event):
"""
Processes log events.
Parameters
----------
event : LogTraceEvent
Event object.
"""
msg = event.get_message(self.felf)
self.messages.append(msg)
if self.print_log_events:
print(msg),
class HeapTraceParseError(ParseError):
"""
Heap trace parse error exception.
"""
pass
class HeapTraceDuplicateAllocError(HeapTraceParseError):
"""
Heap trace duplicate allocation error exception.
"""
def __init__(self, addr, new_size, prev_size):
"""
Constructor.
Parameters
----------
addr : int
memory block address
new_size : int
size of the new allocation
prev_size : int
size of the previous allocation
"""
HeapTraceParseError.__init__(self, """Duplicate alloc @ 0x{:x}!
New alloc is {:d} bytes,
previous is {:d} bytes.""".format(addr, new_size, prev_size))
class HeapTraceEvent:
"""
Heap trace event.
"""
def __init__(self, ctx_name, in_irq, core_id, ts, alloc, size, addr, callers, toolchain='', elf_path=''):
"""
Constructor.
Parameters
----------
ctx_name : string
name of event context (task or IRQ name)
in_irq : bool
True if event has been generated in IRQ context, otherwise False
core_id : int
core which generated the event
ts : float
event timestamp
alloc : bool
True for allocation event, otherwise False
size : int
size of allocation; has no meaning for de-allocation event
addr : int
address of allocation/de-allocation
callers : list
list of callers (callstack) for event
toolchain_pref : string
toolchain prefix to retrieve source line locations using addresses
elf_path : string
path to ELF file to retrieve format strings for log messages
"""
self.ctx_name = ctx_name
self.in_irq = in_irq
self.core_id = core_id
self.ts = ts
self.alloc = alloc
self.size = size
self.addr = addr
self.callers = callers
self.toolchain = toolchain
self.elf_path = elf_path
def __repr__(self):
if len(self.toolchain) and len(self.elf_path):
callers = os.linesep
for addr in self.callers:
callers += '{}'.format(addr2line(self.toolchain, self.elf_path, addr))
else:
callers = ''
for addr in self.callers:
if len(callers):
callers += ':'
callers += '0x{:x}'.format(addr)
if self.in_irq:
ctx_desc = 'IRQ "%s"' % self.ctx_name
else:
ctx_desc = 'task "%s"' % self.ctx_name
if self.alloc:
return "[{:.9f}] HEAP: Allocated {:d} bytes @ 0x{:x} from {} on core {:d} by: {}".format(self.ts, self.size,
self.addr, ctx_desc,
self.core_id, callers)
else:
return "[{:.9f}] HEAP: Freed bytes @ 0x{:x} from {} on core {:d} by: {}".format(self.ts, self.addr, ctx_desc,
self.core_id, callers)
class BaseHeapTraceDataProcessorImpl:
"""
Base implementation for heap data processors.
"""
def __init__(self, print_heap_events=False):
"""
Constructor.
Parameters
----------
print_heap_events : bool
if True every heap event will be printed as they arrive
"""
self._alloc_addrs = {}
self.allocs = []
self.frees = []
self.heap_events_count = 0
self.print_heap_events = print_heap_events
def on_new_event(self, event):
"""
Processes heap events. Keeps track of active allocations list.
Parameters
----------
event : HeapTraceEvent
Event object.
"""
self.heap_events_count += 1
if self.print_heap_events:
print(event)
if event.alloc:
if event.addr in self._alloc_addrs:
raise HeapTraceDuplicateAllocError(event.addr, event.size, self._alloc_addrs[event.addr].size)
self.allocs.append(event)
self._alloc_addrs[event.addr] = event
else:
# do not treat free on unknown addresses as errors, because these blocks coould be allocated when tracing was disabled
if event.addr in self._alloc_addrs:
event.size = self._alloc_addrs[event.addr].size
self.allocs.remove(self._alloc_addrs[event.addr])
del self._alloc_addrs[event.addr]
else:
self.frees.append(event)
def print_report(self):
"""
Prints heap report
"""
print("=============== HEAP TRACE REPORT ===============")
print("Processed {:d} heap events.".format(self.heap_events_count))
if len(self.allocs) == 0:
print("OK - Heap errors was not found.")
return
leaked_bytes = 0
for alloc in self.allocs:
leaked_bytes += alloc.size
print(alloc)
for free in self.frees:
if free.addr > alloc.addr and free.addr <= alloc.addr + alloc.size:
print("Possible wrong free operation found")
print(free)
print("Found {:d} leaked bytes in {:d} blocks.".format(leaked_bytes, len(self.allocs)))