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from pydevd_constants import * #@UnusedWildImport
try:
import cStringIO as StringIO #may not always be available @UnusedImport
except:
try:
import StringIO #@Reimport
except:
import io as StringIO
if USE_LIB_COPY:
import _pydev_threading as threading
else:
import threading
import sys #@Reimport
import traceback
class TracingFunctionHolder:
'''This class exists just to keep some variables (so that we don't keep them in the global namespace).
'''
_original_tracing = None
_warn = True
_lock = threading.Lock()
_traceback_limit = 1
_warnings_shown = {}
def GetExceptionTracebackStr():
exc_info = sys.exc_info()
s = StringIO.StringIO()
traceback.print_exception(exc_info[0], exc_info[1], exc_info[2], file=s)
return s.getvalue()
def _GetStackStr(frame):
msg = '\nIf this is needed, please check: ' + \
'\nhttp://pydev.blogspot.com/2007/06/why-cant-pydev-debugger-work-with.html' + \
'\nto see how to restore the debug tracing back correctly.\n'
if TracingFunctionHolder._traceback_limit:
s = StringIO.StringIO()
s.write('Call Location:\n')
traceback.print_stack(f=frame, limit=TracingFunctionHolder._traceback_limit, file=s)
msg = msg + s.getvalue()
return msg
def _InternalSetTrace(tracing_func):
if TracingFunctionHolder._warn:
frame = GetFrame()
if frame is not None and frame.f_back is not None:
if not frame.f_back.f_code.co_filename.lower().endswith('threading.py'):
message = \
'\nPYDEV DEBUGGER WARNING:' + \
'\nsys.settrace() should not be used when the debugger is being used.' + \
'\nThis may cause the debugger to stop working correctly.' + \
'%s' % _GetStackStr(frame.f_back)
if message not in TracingFunctionHolder._warnings_shown:
#only warn about each message once...
TracingFunctionHolder._warnings_shown[message] = 1
sys.stderr.write('%s\n' % (message,))
sys.stderr.flush()
if TracingFunctionHolder._original_tracing:
TracingFunctionHolder._original_tracing(tracing_func)
def SetTrace(tracing_func):
if TracingFunctionHolder._original_tracing is None:
#This may happen before ReplaceSysSetTraceFunc is called.
sys.settrace(tracing_func)
return
TracingFunctionHolder._lock.acquire()
try:
TracingFunctionHolder._warn = False
_InternalSetTrace(tracing_func)
TracingFunctionHolder._warn = True
finally:
TracingFunctionHolder._lock.release()
def ReplaceSysSetTraceFunc():
if TracingFunctionHolder._original_tracing is None:
TracingFunctionHolder._original_tracing = sys.settrace
sys.settrace = _InternalSetTrace
def RestoreSysSetTraceFunc():
if TracingFunctionHolder._original_tracing is not None:
sys.settrace = TracingFunctionHolder._original_tracing
TracingFunctionHolder._original_tracing = None
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