--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-win32-2.6.1/lib/bdb.py Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,613 @@
+"""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._set_stopinfo(None, None)
+
+ 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 frame.f_lineno >= self.stoplineno
+ 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.canonic(frame.f_code.co_filename) in self.breaks
+
+ # 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_info):
+ exc_type, exc_value, exc_traceback = exc_info
+ """This method is called if an exception occurs,
+ but only if we are to stop at or just below this level."""
+ pass
+
+ def _set_stopinfo(self, stopframe, returnframe, stoplineno=-1):
+ self.stopframe = stopframe
+ self.returnframe = returnframe
+ self.quitting = 0
+ self.stoplineno = stoplineno
+
+ # Derived classes and clients can call the following methods
+ # to affect the stepping state.
+
+ def set_until(self, frame): #the name "until" is borrowed from gdb
+ """Stop when the line with the line no greater than the current one is
+ reached or when returning from current frame"""
+ self._set_stopinfo(frame, frame, frame.f_lineno+1)
+
+ def set_step(self):
+ """Stop after one line of code."""
+ self._set_stopinfo(None,None)
+
+ def set_next(self, frame):
+ """Stop on the next line in or below the given frame."""
+ self._set_stopinfo(frame, None)
+
+ def set_return(self, frame):
+ """Stop when returning from the given frame."""
+ self._set_stopinfo(frame.f_back, frame)
+
+ 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._set_stopinfo(self.botframe, None)
+ 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
+ if f is None:
+ i = max(0, len(stack) - 1)
+ 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:
+ 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:
+ 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:
+ 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