614 lines
20 KiB
Python
614 lines
20 KiB
Python
|
"""Debugger basics"""
|
||
|
|
|
||
|
|
import sys
|
||
|
|
import os
|
||
|
|
import types
|
||
|
|
|
||
|
|
__all__ = ["BdbQuit","Bdb","Breakpoint"]
|
||
|
|
|
||
|
|
class BdbQuit(Exception):
|
||
|
|
"""Exception to give up completely"""
|
||
|
|
|
||
|
|
|
||
|
|
class Bdb:
|
||
|
|
|
||
|
|
"""Generic Python debugger base class.
|
||
|
|
|
||
|
|
This class takes care of details of the trace facility;
|
||
|
|
a derived class should implement user interaction.
|
||
|
|
The standard debugger class (pdb.Pdb) is an example.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(self):
|
||
|
|
self.breaks = {}
|
||
|
|
self.fncache = {}
|
||
|
|
|
||
|
|
def canonic(self, filename):
|
||
|
|
if filename == "<" + filename[1:-1] + ">":
|
||
|
|
return filename
|
||
|
|
canonic = self.fncache.get(filename)
|
||
|
|
if not canonic:
|
||
|
|
canonic = os.path.abspath(filename)
|
||
|
|
canonic = os.path.normcase(canonic)
|
||
|
|
self.fncache[filename] = canonic
|
||
|
|
return canonic
|
||
|
|
|
||
|
|
def reset(self):
|
||
|
|
import linecache
|
||
|
|
linecache.checkcache()
|
||
|
|
self.botframe = None
|
||
|
|
self.stopframe = None
|
||
|
|
self.returnframe = None
|
||
|
|
self.quitting = 0
|
||
|
|
|
||
|
|
def trace_dispatch(self, frame, event, arg):
|
||
|
|
if self.quitting:
|
||
|
|
return # None
|
||
|
|
if event == 'line':
|
||
|
|
return self.dispatch_line(frame)
|
||
|
|
if event == 'call':
|
||
|
|
return self.dispatch_call(frame, arg)
|
||
|
|
if event == 'return':
|
||
|
|
return self.dispatch_return(frame, arg)
|
||
|
|
if event == 'exception':
|
||
|
|
return self.dispatch_exception(frame, arg)
|
||
|
|
if event == 'c_call':
|
||
|
|
return self.trace_dispatch
|
||
|
|
if event == 'c_exception':
|
||
|
|
return self.trace_dispatch
|
||
|
|
if event == 'c_return':
|
||
|
|
return self.trace_dispatch
|
||
|
|
print 'bdb.Bdb.dispatch: unknown debugging event:', repr(event)
|
||
|
|
return self.trace_dispatch
|
||
|
|
|
||
|
|
def dispatch_line(self, frame):
|
||
|
|
if self.stop_here(frame) or self.break_here(frame):
|
||
|
|
self.user_line(frame)
|
||
|
|
if self.quitting: raise BdbQuit
|
||
|
|
return self.trace_dispatch
|
||
|
|
|
||
|
|
def dispatch_call(self, frame, arg):
|
||
|
|
# XXX 'arg' is no longer used
|
||
|
|
if self.botframe is None:
|
||
|
|
# First call of dispatch since reset()
|
||
|
|
self.botframe = frame.f_back # (CT) Note that this may also be None!
|
||
|
|
return self.trace_dispatch
|
||
|
|
if not (self.stop_here(frame) or self.break_anywhere(frame)):
|
||
|
|
# No need to trace this function
|
||
|
|
return # None
|
||
|
|
self.user_call(frame, arg)
|
||
|
|
if self.quitting: raise BdbQuit
|
||
|
|
return self.trace_dispatch
|
||
|
|
|
||
|
|
def dispatch_return(self, frame, arg):
|
||
|
|
if self.stop_here(frame) or frame == self.returnframe:
|
||
|
|
self.user_return(frame, arg)
|
||
|
|
if self.quitting: raise BdbQuit
|
||
|
|
return self.trace_dispatch
|
||
|
|
|
||
|
|
def dispatch_exception(self, frame, arg):
|
||
|
|
if self.stop_here(frame):
|
||
|
|
self.user_exception(frame, arg)
|
||
|
|
if self.quitting: raise BdbQuit
|
||
|
|
return self.trace_dispatch
|
||
|
|
|
||
|
|
# Normally derived classes don't override the following
|
||
|
|
# methods, but they may if they want to redefine the
|
||
|
|
# definition of stopping and breakpoints.
|
||
|
|
|
||
|
|
def stop_here(self, frame):
|
||
|
|
# (CT) stopframe may now also be None, see dispatch_call.
|
||
|
|
# (CT) the former test for None is therefore removed from here.
|
||
|
|
if frame is self.stopframe:
|
||
|
|
return True
|
||
|
|
while frame is not None and frame is not self.stopframe:
|
||
|
|
if frame is self.botframe:
|
||
|
|
return True
|
||
|
|
frame = frame.f_back
|
||
|
|
return False
|
||
|
|
|
||
|
|
def break_here(self, frame):
|
||
|
|
filename = self.canonic(frame.f_code.co_filename)
|
||
|
|
if not filename in self.breaks:
|
||
|
|
return False
|
||
|
|
lineno = frame.f_lineno
|
||
|
|
if not lineno in self.breaks[filename]:
|
||
|
|
# The line itself has no breakpoint, but maybe the line is the
|
||
|
|
# first line of a function with breakpoint set by function name.
|
||
|
|
lineno = frame.f_code.co_firstlineno
|
||
|
|
if not lineno in self.breaks[filename]:
|
||
|
|
return False
|
||
|
|
|
||
|
|
# flag says ok to delete temp. bp
|
||
|
|
(bp, flag) = effective(filename, lineno, frame)
|
||
|
|
if bp:
|
||
|
|
self.currentbp = bp.number
|
||
|
|
if (flag and bp.temporary):
|
||
|
|
self.do_clear(str(bp.number))
|
||
|
|
return True
|
||
|
|
else:
|
||
|
|
return False
|
||
|
|
|
||
|
|
def do_clear(self, arg):
|
||
|
|
raise NotImplementedError, "subclass of bdb must implement do_clear()"
|
||
|
|
|
||
|
|
def break_anywhere(self, frame):
|
||
|
|
return self.breaks.has_key(
|
||
|
|
self.canonic(frame.f_code.co_filename))
|
||
|
|
|
||
|
|
# Derived classes should override the user_* methods
|
||
|
|
# to gain control.
|
||
|
|
|
||
|
|
def user_call(self, frame, argument_list):
|
||
|
|
"""This method is called when there is the remote possibility
|
||
|
|
that we ever need to stop in this function."""
|
||
|
|
pass
|
||
|
|
|
||
|
|
def user_line(self, frame):
|
||
|
|
"""This method is called when we stop or break at this line."""
|
||
|
|
pass
|
||
|
|
|
||
|
|
def user_return(self, frame, return_value):
|
||
|
|
"""This method is called when a return trap is set here."""
|
||
|
|
pass
|
||
|
|
|
||
|
|
def user_exception(self, frame, (exc_type, exc_value, exc_traceback)):
|
||
|
|
"""This method is called if an exception occurs,
|
||
|
|
but only if we are to stop at or just below this level."""
|
||
|
|
pass
|
||
|
|
|
||
|
|
# Derived classes and clients can call the following methods
|
||
|
|
# to affect the stepping state.
|
||
|
|
|
||
|
|
def set_step(self):
|
||
|
|
"""Stop after one line of code."""
|
||
|
|
self.stopframe = None
|
||
|
|
self.returnframe = None
|
||
|
|
self.quitting = 0
|
||
|
|
|
||
|
|
def set_next(self, frame):
|
||
|
|
"""Stop on the next line in or below the given frame."""
|
||
|
|
self.stopframe = frame
|
||
|
|
self.returnframe = None
|
||
|
|
self.quitting = 0
|
||
|
|
|
||
|
|
def set_return(self, frame):
|
||
|
|
"""Stop when returning from the given frame."""
|
||
|
|
self.stopframe = frame.f_back
|
||
|
|
self.returnframe = frame
|
||
|
|
self.quitting = 0
|
||
|
|
|
||
|
|
def set_trace(self, frame=None):
|
||
|
|
"""Start debugging from `frame`.
|
||
|
|
|
||
|
|
If frame is not specified, debugging starts from caller's frame.
|
||
|
|
"""
|
||
|
|
if frame is None:
|
||
|
|
frame = sys._getframe().f_back
|
||
|
|
self.reset()
|
||
|
|
while frame:
|
||
|
|
frame.f_trace = self.trace_dispatch
|
||
|
|
self.botframe = frame
|
||
|
|
frame = frame.f_back
|
||
|
|
self.set_step()
|
||
|
|
sys.settrace(self.trace_dispatch)
|
||
|
|
|
||
|
|
def set_continue(self):
|
||
|
|
# Don't stop except at breakpoints or when finished
|
||
|
|
self.stopframe = self.botframe
|
||
|
|
self.returnframe = None
|
||
|
|
self.quitting = 0
|
||
|
|
if not self.breaks:
|
||
|
|
# no breakpoints; run without debugger overhead
|
||
|
|
sys.settrace(None)
|
||
|
|
frame = sys._getframe().f_back
|
||
|
|
while frame and frame is not self.botframe:
|
||
|
|
del frame.f_trace
|
||
|
|
frame = frame.f_back
|
||
|
|
|
||
|
|
def set_quit(self):
|
||
|
|
self.stopframe = self.botframe
|
||
|
|
self.returnframe = None
|
||
|
|
self.quitting = 1
|
||
|
|
sys.settrace(None)
|
||
|
|
|
||
|
|
# Derived classes and clients can call the following methods
|
||
|
|
# to manipulate breakpoints. These methods return an
|
||
|
|
# error message is something went wrong, None if all is well.
|
||
|
|
# Set_break prints out the breakpoint line and file:lineno.
|
||
|
|
# Call self.get_*break*() to see the breakpoints or better
|
||
|
|
# for bp in Breakpoint.bpbynumber: if bp: bp.bpprint().
|
||
|
|
|
||
|
|
def set_break(self, filename, lineno, temporary=0, cond = None,
|
||
|
|
funcname=None):
|
||
|
|
filename = self.canonic(filename)
|
||
|
|
import linecache # Import as late as possible
|
||
|
|
line = linecache.getline(filename, lineno)
|
||
|
|
if not line:
|
||
|
|
return 'Line %s:%d does not exist' % (filename,
|
||
|
|
lineno)
|
||
|
|
if not filename in self.breaks:
|
||
|
|
self.breaks[filename] = []
|
||
|
|
list = self.breaks[filename]
|
||
|
|
if not lineno in list:
|
||
|
|
list.append(lineno)
|
||
|
|
bp = Breakpoint(filename, lineno, temporary, cond, funcname)
|
||
|
|
|
||
|
|
def clear_break(self, filename, lineno):
|
||
|
|
filename = self.canonic(filename)
|
||
|
|
if not filename in self.breaks:
|
||
|
|
return 'There are no breakpoints in %s' % filename
|
||
|
|
if lineno not in self.breaks[filename]:
|
||
|
|
return 'There is no breakpoint at %s:%d' % (filename,
|
||
|
|
lineno)
|
||
|
|
# If there's only one bp in the list for that file,line
|
||
|
|
# pair, then remove the breaks entry
|
||
|
|
for bp in Breakpoint.bplist[filename, lineno][:]:
|
||
|
|
bp.deleteMe()
|
||
|
|
if not Breakpoint.bplist.has_key((filename, lineno)):
|
||
|
|
self.breaks[filename].remove(lineno)
|
||
|
|
if not self.breaks[filename]:
|
||
|
|
del self.breaks[filename]
|
||
|
|
|
||
|
|
def clear_bpbynumber(self, arg):
|
||
|
|
try:
|
||
|
|
number = int(arg)
|
||
|
|
except:
|
||
|
|
return 'Non-numeric breakpoint number (%s)' % arg
|
||
|
|
try:
|
||
|
|
bp = Breakpoint.bpbynumber[number]
|
||
|
|
except IndexError:
|
||
|
|
return 'Breakpoint number (%d) out of range' % number
|
||
|
|
if not bp:
|
||
|
|
return 'Breakpoint (%d) already deleted' % number
|
||
|
|
self.clear_break(bp.file, bp.line)
|
||
|
|
|
||
|
|
def clear_all_file_breaks(self, filename):
|
||
|
|
filename = self.canonic(filename)
|
||
|
|
if not filename in self.breaks:
|
||
|
|
return 'There are no breakpoints in %s' % filename
|
||
|
|
for line in self.breaks[filename]:
|
||
|
|
blist = Breakpoint.bplist[filename, line]
|
||
|
|
for bp in blist:
|
||
|
|
bp.deleteMe()
|
||
|
|
del self.breaks[filename]
|
||
|
|
|
||
|
|
def clear_all_breaks(self):
|
||
|
|
if not self.breaks:
|
||
|
|
return 'There are no breakpoints'
|
||
|
|
for bp in Breakpoint.bpbynumber:
|
||
|
|
if bp:
|
||
|
|
bp.deleteMe()
|
||
|
|
self.breaks = {}
|
||
|
|
|
||
|
|
def get_break(self, filename, lineno):
|
||
|
|
filename = self.canonic(filename)
|
||
|
|
return filename in self.breaks and \
|
||
|
|
lineno in self.breaks[filename]
|
||
|
|
|
||
|
|
def get_breaks(self, filename, lineno):
|
||
|
|
filename = self.canonic(filename)
|
||
|
|
return filename in self.breaks and \
|
||
|
|
lineno in self.breaks[filename] and \
|
||
|
|
Breakpoint.bplist[filename, lineno] or []
|
||
|
|
|
||
|
|
def get_file_breaks(self, filename):
|
||
|
|
filename = self.canonic(filename)
|
||
|
|
if filename in self.breaks:
|
||
|
|
return self.breaks[filename]
|
||
|
|
else:
|
||
|
|
return []
|
||
|
|
|
||
|
|
def get_all_breaks(self):
|
||
|
|
return self.breaks
|
||
|
|
|
||
|
|
# Derived classes and clients can call the following method
|
||
|
|
# to get a data structure representing a stack trace.
|
||
|
|
|
||
|
|
def get_stack(self, f, t):
|
||
|
|
stack = []
|
||
|
|
if t and t.tb_frame is f:
|
||
|
|
t = t.tb_next
|
||
|
|
while f is not None:
|
||
|
|
stack.append((f, f.f_lineno))
|
||
|
|
if f is self.botframe:
|
||
|
|
break
|
||
|
|
f = f.f_back
|
||
|
|
stack.reverse()
|
||
|
|
i = max(0, len(stack) - 1)
|
||
|
|
while t is not None:
|
||
|
|
stack.append((t.tb_frame, t.tb_lineno))
|
||
|
|
t = t.tb_next
|
||
|
|
return stack, i
|
||
|
|
|
||
|
|
#
|
||
|
|
|
||
|
|
def format_stack_entry(self, frame_lineno, lprefix=': '):
|
||
|
|
import linecache, repr
|
||
|
|
frame, lineno = frame_lineno
|
||
|
|
filename = self.canonic(frame.f_code.co_filename)
|
||
|
|
s = '%s(%r)' % (filename, lineno)
|
||
|
|
if frame.f_code.co_name:
|
||
|
|
s = s + frame.f_code.co_name
|
||
|
|
else:
|
||
|
|
s = s + "<lambda>"
|
||
|
|
if '__args__' in frame.f_locals:
|
||
|
|
args = frame.f_locals['__args__']
|
||
|
|
else:
|
||
|
|
args = None
|
||
|
|
if args:
|
||
|
|
s = s + repr.repr(args)
|
||
|
|
else:
|
||
|
|
s = s + '()'
|
||
|
|
if '__return__' in frame.f_locals:
|
||
|
|
rv = frame.f_locals['__return__']
|
||
|
|
s = s + '->'
|
||
|
|
s = s + repr.repr(rv)
|
||
|
|
line = linecache.getline(filename, lineno)
|
||
|
|
if line: s = s + lprefix + line.strip()
|
||
|
|
return s
|
||
|
|
|
||
|
|
# The following two methods can be called by clients to use
|
||
|
|
# a debugger to debug a statement, given as a string.
|
||
|
|
|
||
|
|
def run(self, cmd, globals=None, locals=None):
|
||
|
|
if globals is None:
|
||
|
|
import __main__
|
||
|
|
globals = __main__.__dict__
|
||
|
|
if locals is None:
|
||
|
|
locals = globals
|
||
|
|
self.reset()
|
||
|
|
sys.settrace(self.trace_dispatch)
|
||
|
|
if not isinstance(cmd, types.CodeType):
|
||
|
|
cmd = cmd+'\n'
|
||
|
|
try:
|
||
|
|
try:
|
||
|
|
exec cmd in globals, locals
|
||
|
|
except BdbQuit:
|
||
|
|
pass
|
||
|
|
finally:
|
||
|
|
self.quitting = 1
|
||
|
|
sys.settrace(None)
|
||
|
|
|
||
|
|
def runeval(self, expr, globals=None, locals=None):
|
||
|
|
if globals is None:
|
||
|
|
import __main__
|
||
|
|
globals = __main__.__dict__
|
||
|
|
if locals is None:
|
||
|
|
locals = globals
|
||
|
|
self.reset()
|
||
|
|
sys.settrace(self.trace_dispatch)
|
||
|
|
if not isinstance(expr, types.CodeType):
|
||
|
|
expr = expr+'\n'
|
||
|
|
try:
|
||
|
|
try:
|
||
|
|
return eval(expr, globals, locals)
|
||
|
|
except BdbQuit:
|
||
|
|
pass
|
||
|
|
finally:
|
||
|
|
self.quitting = 1
|
||
|
|
sys.settrace(None)
|
||
|
|
|
||
|
|
def runctx(self, cmd, globals, locals):
|
||
|
|
# B/W compatibility
|
||
|
|
self.run(cmd, globals, locals)
|
||
|
|
|
||
|
|
# This method is more useful to debug a single function call.
|
||
|
|
|
||
|
|
def runcall(self, func, *args, **kwds):
|
||
|
|
self.reset()
|
||
|
|
sys.settrace(self.trace_dispatch)
|
||
|
|
res = None
|
||
|
|
try:
|
||
|
|
try:
|
||
|
|
res = func(*args, **kwds)
|
||
|
|
except BdbQuit:
|
||
|
|
pass
|
||
|
|
finally:
|
||
|
|
self.quitting = 1
|
||
|
|
sys.settrace(None)
|
||
|
|
return res
|
||
|
|
|
||
|
|
|
||
|
|
def set_trace():
|
||
|
|
Bdb().set_trace()
|
||
|
|
|
||
|
|
|
||
|
|
class Breakpoint:
|
||
|
|
|
||
|
|
"""Breakpoint class
|
||
|
|
|
||
|
|
Implements temporary breakpoints, ignore counts, disabling and
|
||
|
|
(re)-enabling, and conditionals.
|
||
|
|
|
||
|
|
Breakpoints are indexed by number through bpbynumber and by
|
||
|
|
the file,line tuple using bplist. The former points to a
|
||
|
|
single instance of class Breakpoint. The latter points to a
|
||
|
|
list of such instances since there may be more than one
|
||
|
|
breakpoint per line.
|
||
|
|
|
||
|
|
"""
|
||
|
|
|
||
|
|
# XXX Keeping state in the class is a mistake -- this means
|
||
|
|
# you cannot have more than one active Bdb instance.
|
||
|
|
|
||
|
|
next = 1 # Next bp to be assigned
|
||
|
|
bplist = {} # indexed by (file, lineno) tuple
|
||
|
|
bpbynumber = [None] # Each entry is None or an instance of Bpt
|
||
|
|
# index 0 is unused, except for marking an
|
||
|
|
# effective break .... see effective()
|
||
|
|
|
||
|
|
def __init__(self, file, line, temporary=0, cond=None, funcname=None):
|
||
|
|
self.funcname = funcname
|
||
|
|
# Needed if funcname is not None.
|
||
|
|
self.func_first_executable_line = None
|
||
|
|
self.file = file # This better be in canonical form!
|
||
|
|
self.line = line
|
||
|
|
self.temporary = temporary
|
||
|
|
self.cond = cond
|
||
|
|
self.enabled = 1
|
||
|
|
self.ignore = 0
|
||
|
|
self.hits = 0
|
||
|
|
self.number = Breakpoint.next
|
||
|
|
Breakpoint.next = Breakpoint.next + 1
|
||
|
|
# Build the two lists
|
||
|
|
self.bpbynumber.append(self)
|
||
|
|
if self.bplist.has_key((file, line)):
|
||
|
|
self.bplist[file, line].append(self)
|
||
|
|
else:
|
||
|
|
self.bplist[file, line] = [self]
|
||
|
|
|
||
|
|
|
||
|
|
def deleteMe(self):
|
||
|
|
index = (self.file, self.line)
|
||
|
|
self.bpbynumber[self.number] = None # No longer in list
|
||
|
|
self.bplist[index].remove(self)
|
||
|
|
if not self.bplist[index]:
|
||
|
|
# No more bp for this f:l combo
|
||
|
|
del self.bplist[index]
|
||
|
|
|
||
|
|
def enable(self):
|
||
|
|
self.enabled = 1
|
||
|
|
|
||
|
|
def disable(self):
|
||
|
|
self.enabled = 0
|
||
|
|
|
||
|
|
def bpprint(self, out=None):
|
||
|
|
if out is None:
|
||
|
|
out = sys.stdout
|
||
|
|
if self.temporary:
|
||
|
|
disp = 'del '
|
||
|
|
else:
|
||
|
|
disp = 'keep '
|
||
|
|
if self.enabled:
|
||
|
|
disp = disp + 'yes '
|
||
|
|
else:
|
||
|
|
disp = disp + 'no '
|
||
|
|
print >>out, '%-4dbreakpoint %s at %s:%d' % (self.number, disp,
|
||
|
|
self.file, self.line)
|
||
|
|
if self.cond:
|
||
|
|
print >>out, '\tstop only if %s' % (self.cond,)
|
||
|
|
if self.ignore:
|
||
|
|
print >>out, '\tignore next %d hits' % (self.ignore)
|
||
|
|
if (self.hits):
|
||
|
|
if (self.hits > 1): ss = 's'
|
||
|
|
else: ss = ''
|
||
|
|
print >>out, ('\tbreakpoint already hit %d time%s' %
|
||
|
|
(self.hits, ss))
|
||
|
|
|
||
|
|
# -----------end of Breakpoint class----------
|
||
|
|
|
||
|
|
def checkfuncname(b, frame):
|
||
|
|
"""Check whether we should break here because of `b.funcname`."""
|
||
|
|
if not b.funcname:
|
||
|
|
# Breakpoint was set via line number.
|
||
|
|
if b.line != frame.f_lineno:
|
||
|
|
# Breakpoint was set at a line with a def statement and the function
|
||
|
|
# defined is called: don't break.
|
||
|
|
return False
|
||
|
|
return True
|
||
|
|
|
||
|
|
# Breakpoint set via function name.
|
||
|
|
|
||
|
|
if frame.f_code.co_name != b.funcname:
|
||
|
|
# It's not a function call, but rather execution of def statement.
|
||
|
|
return False
|
||
|
|
|
||
|
|
# We are in the right frame.
|
||
|
|
if not b.func_first_executable_line:
|
||
|
|
# The function is entered for the 1st time.
|
||
|
|
b.func_first_executable_line = frame.f_lineno
|
||
|
|
|
||
|
|
if b.func_first_executable_line != frame.f_lineno:
|
||
|
|
# But we are not at the first line number: don't break.
|
||
|
|
return False
|
||
|
|
return True
|
||
|
|
|
||
|
|
# Determines if there is an effective (active) breakpoint at this
|
||
|
|
# line of code. Returns breakpoint number or 0 if none
|
||
|
|
def effective(file, line, frame):
|
||
|
|
"""Determine which breakpoint for this file:line is to be acted upon.
|
||
|
|
|
||
|
|
Called only if we know there is a bpt at this
|
||
|
|
location. Returns breakpoint that was triggered and a flag
|
||
|
|
that indicates if it is ok to delete a temporary bp.
|
||
|
|
|
||
|
|
"""
|
||
|
|
possibles = Breakpoint.bplist[file,line]
|
||
|
|
for i in range(0, len(possibles)):
|
||
|
|
b = possibles[i]
|
||
|
|
if b.enabled == 0:
|
||
|
|
continue
|
||
|
|
if not checkfuncname(b, frame):
|
||
|
|
continue
|
||
|
|
# Count every hit when bp is enabled
|
||
|
|
b.hits = b.hits + 1
|
||
|
|
if not b.cond:
|
||
|
|
# If unconditional, and ignoring,
|
||
|
|
# go on to next, else break
|
||
|
|
if b.ignore > 0:
|
||
|
|
b.ignore = b.ignore -1
|
||
|
|
continue
|
||
|
|
else:
|
||
|
|
# breakpoint and marker that's ok
|
||
|
|
# to delete if temporary
|
||
|
|
return (b,1)
|
||
|
|
else:
|
||
|
|
# Conditional bp.
|
||
|
|
# Ignore count applies only to those bpt hits where the
|
||
|
|
# condition evaluates to true.
|
||
|
|
try:
|
||
|
|
val = eval(b.cond, frame.f_globals,
|
||
|
|
frame.f_locals)
|
||
|
|
if val:
|
||
|
|
if b.ignore > 0:
|
||
|
|
b.ignore = b.ignore -1
|
||
|
|
# continue
|
||
|
|
else:
|
||
|
|
return (b,1)
|
||
|
|
# else:
|
||
|
|
# continue
|
||
|
|
except:
|
||
|
|
# if eval fails, most conservative
|
||
|
|
# thing is to stop on breakpoint
|
||
|
|
# regardless of ignore count.
|
||
|
|
# Don't delete temporary,
|
||
|
|
# as another hint to user.
|
||
|
|
return (b,0)
|
||
|
|
return (None, None)
|
||
|
|
|
||
|
|
# -------------------- testing --------------------
|
||
|
|
|
||
|
|
class Tdb(Bdb):
|
||
|
|
def user_call(self, frame, args):
|
||
|
|
name = frame.f_code.co_name
|
||
|
|
if not name: name = '???'
|
||
|
|
print '+++ call', name, args
|
||
|
|
def user_line(self, frame):
|
||
|
|
import linecache
|
||
|
|
name = frame.f_code.co_name
|
||
|
|
if not name: name = '???'
|
||
|
|
fn = self.canonic(frame.f_code.co_filename)
|
||
|
|
line = linecache.getline(fn, frame.f_lineno)
|
||
|
|
print '+++', fn, frame.f_lineno, name, ':', line.strip()
|
||
|
|
def user_return(self, frame, retval):
|
||
|
|
print '+++ return', retval
|
||
|
|
def user_exception(self, frame, exc_stuff):
|
||
|
|
print '+++ exception', exc_stuff
|
||
|
|
self.set_continue()
|
||
|
|
|
||
|
|
def foo(n):
|
||
|
|
print 'foo(', n, ')'
|
||
|
|
x = bar(n*10)
|
||
|
|
print 'bar returned', x
|
||
|
|
|
||
|
|
def bar(a):
|
||
|
|
print 'bar(', a, ')'
|
||
|
|
return a/2
|
||
|
|
|
||
|
|
def test():
|
||
|
|
t = Tdb()
|
||
|
|
t.run('import bdb; bdb.foo(10)')
|
||
|
|
|
||
|
|
# end
|