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1323 lines
45 KiB
Python
Executable File
1323 lines
45 KiB
Python
Executable File
#! /usr/bin/env python3
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"""A Python debugger."""
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# (See pdb.doc for documentation.)
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import sys
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import linecache
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import cmd
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import bdb
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from reprlib import Repr
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import os
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import re
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import pprint
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import traceback
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class Restart(Exception):
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"""Causes a debugger to be restarted for the debugged python program."""
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pass
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# Create a custom safe Repr instance and increase its maxstring.
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# The default of 30 truncates error messages too easily.
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_repr = Repr()
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_repr.maxstring = 200
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_saferepr = _repr.repr
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__all__ = ["run", "pm", "Pdb", "runeval", "runctx", "runcall", "set_trace",
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"post_mortem", "help"]
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def find_function(funcname, filename):
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cre = re.compile(r'def\s+%s\s*[(]' % re.escape(funcname))
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try:
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fp = open(filename)
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except IOError:
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return None
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# consumer of this info expects the first line to be 1
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lineno = 1
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answer = None
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while 1:
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line = fp.readline()
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if line == '':
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break
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if cre.match(line):
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answer = funcname, filename, lineno
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break
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lineno = lineno + 1
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fp.close()
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return answer
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# Interaction prompt line will separate file and call info from code
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# text using value of line_prefix string. A newline and arrow may
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# be to your liking. You can set it once pdb is imported using the
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# command "pdb.line_prefix = '\n% '".
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# line_prefix = ': ' # Use this to get the old situation back
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line_prefix = '\n-> ' # Probably a better default
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class Pdb(bdb.Bdb, cmd.Cmd):
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def __init__(self, completekey='tab', stdin=None, stdout=None, skip=None):
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bdb.Bdb.__init__(self, skip=skip)
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cmd.Cmd.__init__(self, completekey, stdin, stdout)
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if stdout:
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self.use_rawinput = 0
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self.prompt = '(Pdb) '
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self.aliases = {}
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self.mainpyfile = ''
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self._wait_for_mainpyfile = 0
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# Try to load readline if it exists
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try:
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import readline
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except ImportError:
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pass
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# Read $HOME/.pdbrc and ./.pdbrc
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self.rcLines = []
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if 'HOME' in os.environ:
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envHome = os.environ['HOME']
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try:
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rcFile = open(os.path.join(envHome, ".pdbrc"))
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except IOError:
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pass
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else:
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for line in rcFile.readlines():
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self.rcLines.append(line)
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rcFile.close()
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try:
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rcFile = open(".pdbrc")
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except IOError:
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pass
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else:
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for line in rcFile.readlines():
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self.rcLines.append(line)
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rcFile.close()
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self.commands = {} # associates a command list to breakpoint numbers
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self.commands_doprompt = {} # for each bp num, tells if the prompt
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# must be disp. after execing the cmd list
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self.commands_silent = {} # for each bp num, tells if the stack trace
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# must be disp. after execing the cmd list
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self.commands_defining = False # True while in the process of defining
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# a command list
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self.commands_bnum = None # The breakpoint number for which we are
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# defining a list
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def reset(self):
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bdb.Bdb.reset(self)
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self.forget()
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def forget(self):
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self.lineno = None
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self.stack = []
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self.curindex = 0
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self.curframe = None
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def setup(self, f, t):
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self.forget()
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self.stack, self.curindex = self.get_stack(f, t)
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self.curframe = self.stack[self.curindex][0]
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# The f_locals dictionary is updated from the actual frame
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# locals whenever the .f_locals accessor is called, so we
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# cache it here to ensure that modifications are not overwritten.
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self.curframe_locals = self.curframe.f_locals
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self.execRcLines()
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# Can be executed earlier than 'setup' if desired
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def execRcLines(self):
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if self.rcLines:
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# Make local copy because of recursion
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rcLines = self.rcLines
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# executed only once
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self.rcLines = []
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for line in rcLines:
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line = line[:-1]
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if len(line) > 0 and line[0] != '#':
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self.onecmd(line)
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# Override Bdb methods
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def user_call(self, frame, argument_list):
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"""This method is called when there is the remote possibility
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that we ever need to stop in this function."""
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if self._wait_for_mainpyfile:
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return
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if self.stop_here(frame):
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print('--Call--', file=self.stdout)
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self.interaction(frame, None)
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def user_line(self, frame):
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"""This function is called when we stop or break at this line."""
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if self._wait_for_mainpyfile:
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if (self.mainpyfile != self.canonic(frame.f_code.co_filename)
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or frame.f_lineno<= 0):
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return
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self._wait_for_mainpyfile = 0
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if self.bp_commands(frame):
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self.interaction(frame, None)
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def bp_commands(self,frame):
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"""Call every command that was set for the current active breakpoint
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(if there is one).
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Returns True if the normal interaction function must be called,
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False otherwise."""
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# self.currentbp is set in bdb in Bdb.break_here if a breakpoint was hit
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if getattr(self, "currentbp", False) and \
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self.currentbp in self.commands:
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currentbp = self.currentbp
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self.currentbp = 0
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lastcmd_back = self.lastcmd
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self.setup(frame, None)
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for line in self.commands[currentbp]:
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self.onecmd(line)
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self.lastcmd = lastcmd_back
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if not self.commands_silent[currentbp]:
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self.print_stack_entry(self.stack[self.curindex])
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if self.commands_doprompt[currentbp]:
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self.cmdloop()
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self.forget()
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return
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return 1
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def user_return(self, frame, return_value):
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"""This function is called when a return trap is set here."""
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frame.f_locals['__return__'] = return_value
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print('--Return--', file=self.stdout)
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self.interaction(frame, None)
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def user_exception(self, frame, exc_info):
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"""This function is called if an exception occurs,
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but only if we are to stop at or just below this level."""
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exc_type, exc_value, exc_traceback = exc_info
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frame.f_locals['__exception__'] = exc_type, exc_value
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exc_type_name = exc_type.__name__
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print(exc_type_name + ':', _saferepr(exc_value), file=self.stdout)
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self.interaction(frame, exc_traceback)
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# General interaction function
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def interaction(self, frame, traceback):
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self.setup(frame, traceback)
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self.print_stack_entry(self.stack[self.curindex])
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self.cmdloop()
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self.forget()
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def displayhook(self, obj):
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"""Custom displayhook for the exec in default(), which prevents
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assignment of the _ variable in the builtins.
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"""
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# reproduce the behavior of the standard displayhook, not printing None
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if obj is not None:
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print(repr(obj))
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def default(self, line):
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if line[:1] == '!': line = line[1:]
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locals = self.curframe_locals
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globals = self.curframe.f_globals
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try:
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code = compile(line + '\n', '<stdin>', 'single')
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save_stdout = sys.stdout
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save_stdin = sys.stdin
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save_displayhook = sys.displayhook
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try:
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sys.stdin = self.stdin
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sys.stdout = self.stdout
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sys.displayhook = self.displayhook
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exec(code, globals, locals)
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finally:
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sys.stdout = save_stdout
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sys.stdin = save_stdin
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sys.displayhook = save_displayhook
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except:
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t, v = sys.exc_info()[:2]
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if type(t) == type(''):
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exc_type_name = t
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else: exc_type_name = t.__name__
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print('***', exc_type_name + ':', v, file=self.stdout)
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def precmd(self, line):
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"""Handle alias expansion and ';;' separator."""
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if not line.strip():
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return line
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args = line.split()
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while args[0] in self.aliases:
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line = self.aliases[args[0]]
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ii = 1
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for tmpArg in args[1:]:
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line = line.replace("%" + str(ii),
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tmpArg)
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ii = ii + 1
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line = line.replace("%*", ' '.join(args[1:]))
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args = line.split()
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# split into ';;' separated commands
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# unless it's an alias command
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if args[0] != 'alias':
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marker = line.find(';;')
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if marker >= 0:
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# queue up everything after marker
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next = line[marker+2:].lstrip()
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self.cmdqueue.append(next)
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line = line[:marker].rstrip()
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return line
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def onecmd(self, line):
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"""Interpret the argument as though it had been typed in response
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to the prompt.
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Checks whether this line is typed at the normal prompt or in
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a breakpoint command list definition.
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"""
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if not self.commands_defining:
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return cmd.Cmd.onecmd(self, line)
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else:
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return self.handle_command_def(line)
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def handle_command_def(self,line):
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""" Handles one command line during command list definition. """
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cmd, arg, line = self.parseline(line)
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if cmd == 'silent':
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self.commands_silent[self.commands_bnum] = True
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return # continue to handle other cmd def in the cmd list
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elif cmd == 'end':
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self.cmdqueue = []
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return 1 # end of cmd list
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cmdlist = self.commands[self.commands_bnum]
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if (arg):
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cmdlist.append(cmd+' '+arg)
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else:
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cmdlist.append(cmd)
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# Determine if we must stop
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try:
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func = getattr(self, 'do_' + cmd)
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except AttributeError:
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func = self.default
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# one of the resuming commands
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if func.__name__ in self.commands_resuming:
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self.commands_doprompt[self.commands_bnum] = False
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self.cmdqueue = []
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return 1
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return
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# Command definitions, called by cmdloop()
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# The argument is the remaining string on the command line
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# Return true to exit from the command loop
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do_h = cmd.Cmd.do_help
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def do_commands(self, arg):
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"""Defines a list of commands associated to a breakpoint.
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Those commands will be executed whenever the breakpoint causes
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the program to stop execution."""
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if not arg:
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bnum = len(bdb.Breakpoint.bpbynumber)-1
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else:
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try:
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bnum = int(arg)
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except:
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print("Usage : commands [bnum]\n ...\n end",
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file=self.stdout)
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return
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self.commands_bnum = bnum
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self.commands[bnum] = []
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self.commands_doprompt[bnum] = True
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self.commands_silent[bnum] = False
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prompt_back = self.prompt
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self.prompt = '(com) '
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self.commands_defining = True
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self.cmdloop()
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self.commands_defining = False
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self.prompt = prompt_back
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def do_break(self, arg, temporary = 0):
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# break [ ([filename:]lineno | function) [, "condition"] ]
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if not arg:
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if self.breaks: # There's at least one
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print("Num Type Disp Enb Where", file=self.stdout)
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for bp in bdb.Breakpoint.bpbynumber:
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if bp:
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bp.bpprint(self.stdout)
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return
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# parse arguments; comma has lowest precedence
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# and cannot occur in filename
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filename = None
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lineno = None
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cond = None
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comma = arg.find(',')
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if comma > 0:
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# parse stuff after comma: "condition"
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cond = arg[comma+1:].lstrip()
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arg = arg[:comma].rstrip()
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# parse stuff before comma: [filename:]lineno | function
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colon = arg.rfind(':')
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funcname = None
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if colon >= 0:
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filename = arg[:colon].rstrip()
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f = self.lookupmodule(filename)
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if not f:
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print('*** ', repr(filename), end=' ', file=self.stdout)
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print('not found from sys.path', file=self.stdout)
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return
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else:
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filename = f
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arg = arg[colon+1:].lstrip()
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try:
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lineno = int(arg)
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except ValueError as msg:
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print('*** Bad lineno:', arg, file=self.stdout)
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return
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else:
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# no colon; can be lineno or function
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try:
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lineno = int(arg)
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except ValueError:
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try:
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func = eval(arg,
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self.curframe.f_globals,
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self.curframe_locals)
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except:
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func = arg
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try:
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if hasattr(func, '__func__'):
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func = func.__func__
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code = func.__code__
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#use co_name to identify the bkpt (function names
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#could be aliased, but co_name is invariant)
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funcname = code.co_name
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lineno = code.co_firstlineno
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filename = code.co_filename
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except:
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# last thing to try
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(ok, filename, ln) = self.lineinfo(arg)
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if not ok:
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print('*** The specified object', end=' ', file=self.stdout)
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print(repr(arg), end=' ', file=self.stdout)
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print('is not a function', file=self.stdout)
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print('or was not found along sys.path.', file=self.stdout)
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return
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funcname = ok # ok contains a function name
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lineno = int(ln)
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if not filename:
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filename = self.defaultFile()
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# Check for reasonable breakpoint
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line = self.checkline(filename, lineno)
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if line:
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# now set the break point
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err = self.set_break(filename, line, temporary, cond, funcname)
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if err: print('***', err, file=self.stdout)
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else:
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bp = self.get_breaks(filename, line)[-1]
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print("Breakpoint %d at %s:%d" % (bp.number,
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bp.file,
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bp.line), file=self.stdout)
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# To be overridden in derived debuggers
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def defaultFile(self):
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"""Produce a reasonable default."""
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filename = self.curframe.f_code.co_filename
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if filename == '<string>' and self.mainpyfile:
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filename = self.mainpyfile
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return filename
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do_b = do_break
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def do_tbreak(self, arg):
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self.do_break(arg, 1)
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def lineinfo(self, identifier):
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failed = (None, None, None)
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# Input is identifier, may be in single quotes
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idstring = identifier.split("'")
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if len(idstring) == 1:
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# not in single quotes
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id = idstring[0].strip()
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elif len(idstring) == 3:
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# quoted
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id = idstring[1].strip()
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else:
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return failed
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if id == '': return failed
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parts = id.split('.')
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# Protection for derived debuggers
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if parts[0] == 'self':
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del parts[0]
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if len(parts) == 0:
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return failed
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# Best first guess at file to look at
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fname = self.defaultFile()
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if len(parts) == 1:
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item = parts[0]
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else:
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# More than one part.
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# First is module, second is method/class
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f = self.lookupmodule(parts[0])
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if f:
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fname = f
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item = parts[1]
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answer = find_function(item, fname)
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return answer or failed
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def checkline(self, filename, lineno):
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"""Check whether specified line seems to be executable.
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Return `lineno` if it is, 0 if not (e.g. a docstring, comment, blank
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line or EOF). Warning: testing is not comprehensive.
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"""
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line = linecache.getline(filename, lineno, self.curframe.f_globals)
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if not line:
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print('End of file', file=self.stdout)
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return 0
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line = line.strip()
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# Don't allow setting breakpoint at a blank line
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if (not line or (line[0] == '#') or
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(line[:3] == '"""') or line[:3] == "'''"):
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print('*** Blank or comment', file=self.stdout)
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return 0
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return lineno
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def do_enable(self, arg):
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args = arg.split()
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for i in args:
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try:
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i = int(i)
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except ValueError:
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print('Breakpoint index %r is not a number' % i, file=self.stdout)
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continue
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if not (0 <= i < len(bdb.Breakpoint.bpbynumber)):
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print('No breakpoint numbered', i, file=self.stdout)
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continue
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bp = bdb.Breakpoint.bpbynumber[i]
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if bp:
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bp.enable()
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def do_disable(self, arg):
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args = arg.split()
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for i in args:
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try:
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i = int(i)
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except ValueError:
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print('Breakpoint index %r is not a number' % i, file=self.stdout)
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continue
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if not (0 <= i < len(bdb.Breakpoint.bpbynumber)):
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print('No breakpoint numbered', i, file=self.stdout)
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continue
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bp = bdb.Breakpoint.bpbynumber[i]
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if bp:
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bp.disable()
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def do_condition(self, arg):
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# arg is breakpoint number and condition
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args = arg.split(' ', 1)
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try:
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bpnum = int(args[0].strip())
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except ValueError:
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# something went wrong
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print('Breakpoint index %r is not a number' % args[0], file=self.stdout)
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return
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try:
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cond = args[1]
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except:
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cond = None
|
|
try:
|
|
bp = bdb.Breakpoint.bpbynumber[bpnum]
|
|
except IndexError:
|
|
print('Breakpoint index %r is not valid' % args[0],
|
|
file=self.stdout)
|
|
return
|
|
if bp:
|
|
bp.cond = cond
|
|
if not cond:
|
|
print('Breakpoint', bpnum, end=' ', file=self.stdout)
|
|
print('is now unconditional.', file=self.stdout)
|
|
|
|
def do_ignore(self,arg):
|
|
"""arg is bp number followed by ignore count."""
|
|
args = arg.split()
|
|
try:
|
|
bpnum = int(args[0].strip())
|
|
except ValueError:
|
|
# something went wrong
|
|
print('Breakpoint index %r is not a number' % args[0], file=self.stdout)
|
|
return
|
|
try:
|
|
count = int(args[1].strip())
|
|
except:
|
|
count = 0
|
|
try:
|
|
bp = bdb.Breakpoint.bpbynumber[bpnum]
|
|
except IndexError:
|
|
print('Breakpoint index %r is not valid' % args[0],
|
|
file=self.stdout)
|
|
return
|
|
if bp:
|
|
bp.ignore = count
|
|
if count > 0:
|
|
reply = 'Will ignore next '
|
|
if count > 1:
|
|
reply = reply + '%d crossings' % count
|
|
else:
|
|
reply = reply + '1 crossing'
|
|
print(reply + ' of breakpoint %d.' % bpnum, file=self.stdout)
|
|
else:
|
|
print('Will stop next time breakpoint', end=' ', file=self.stdout)
|
|
print(bpnum, 'is reached.', file=self.stdout)
|
|
|
|
def do_clear(self, arg):
|
|
"""Three possibilities, tried in this order:
|
|
clear -> clear all breaks, ask for confirmation
|
|
clear file:lineno -> clear all breaks at file:lineno
|
|
clear bpno bpno ... -> clear breakpoints by number"""
|
|
if not arg:
|
|
try:
|
|
reply = input('Clear all breaks? ')
|
|
except EOFError:
|
|
reply = 'no'
|
|
reply = reply.strip().lower()
|
|
if reply in ('y', 'yes'):
|
|
self.clear_all_breaks()
|
|
return
|
|
if ':' in arg:
|
|
# Make sure it works for "clear C:\foo\bar.py:12"
|
|
i = arg.rfind(':')
|
|
filename = arg[:i]
|
|
arg = arg[i+1:]
|
|
try:
|
|
lineno = int(arg)
|
|
except ValueError:
|
|
err = "Invalid line number (%s)" % arg
|
|
else:
|
|
err = self.clear_break(filename, lineno)
|
|
if err: print('***', err, file=self.stdout)
|
|
return
|
|
numberlist = arg.split()
|
|
for i in numberlist:
|
|
try:
|
|
i = int(i)
|
|
except ValueError:
|
|
print('Breakpoint index %r is not a number' % i, file=self.stdout)
|
|
continue
|
|
|
|
if not (0 <= i < len(bdb.Breakpoint.bpbynumber)):
|
|
print('No breakpoint numbered', i, file=self.stdout)
|
|
continue
|
|
err = self.clear_bpbynumber(i)
|
|
if err:
|
|
print('***', err, file=self.stdout)
|
|
else:
|
|
print('Deleted breakpoint', i, file=self.stdout)
|
|
do_cl = do_clear # 'c' is already an abbreviation for 'continue'
|
|
|
|
def do_where(self, arg):
|
|
self.print_stack_trace()
|
|
do_w = do_where
|
|
do_bt = do_where
|
|
|
|
def do_up(self, arg):
|
|
if self.curindex == 0:
|
|
print('*** Oldest frame', file=self.stdout)
|
|
else:
|
|
self.curindex = self.curindex - 1
|
|
self.curframe = self.stack[self.curindex][0]
|
|
self.curframe_locals = self.curframe.f_locals
|
|
self.print_stack_entry(self.stack[self.curindex])
|
|
self.lineno = None
|
|
do_u = do_up
|
|
|
|
def do_down(self, arg):
|
|
if self.curindex + 1 == len(self.stack):
|
|
print('*** Newest frame', file=self.stdout)
|
|
else:
|
|
self.curindex = self.curindex + 1
|
|
self.curframe = self.stack[self.curindex][0]
|
|
self.curframe_locals = self.curframe.f_locals
|
|
self.print_stack_entry(self.stack[self.curindex])
|
|
self.lineno = None
|
|
do_d = do_down
|
|
|
|
def do_until(self, arg):
|
|
self.set_until(self.curframe)
|
|
return 1
|
|
do_unt = do_until
|
|
|
|
def do_step(self, arg):
|
|
self.set_step()
|
|
return 1
|
|
do_s = do_step
|
|
|
|
def do_next(self, arg):
|
|
self.set_next(self.curframe)
|
|
return 1
|
|
do_n = do_next
|
|
|
|
def do_run(self, arg):
|
|
"""Restart program by raising an exception to be caught in the main
|
|
debugger loop. If arguments were given, set them in sys.argv."""
|
|
if arg:
|
|
import shlex
|
|
argv0 = sys.argv[0:1]
|
|
sys.argv = shlex.split(arg)
|
|
sys.argv[:0] = argv0
|
|
raise Restart
|
|
|
|
do_restart = do_run
|
|
|
|
def do_return(self, arg):
|
|
self.set_return(self.curframe)
|
|
return 1
|
|
do_r = do_return
|
|
|
|
def do_continue(self, arg):
|
|
self.set_continue()
|
|
return 1
|
|
do_c = do_cont = do_continue
|
|
|
|
def do_jump(self, arg):
|
|
if self.curindex + 1 != len(self.stack):
|
|
print("*** You can only jump within the bottom frame", file=self.stdout)
|
|
return
|
|
try:
|
|
arg = int(arg)
|
|
except ValueError:
|
|
print("*** The 'jump' command requires a line number.", file=self.stdout)
|
|
else:
|
|
try:
|
|
# Do the jump, fix up our copy of the stack, and display the
|
|
# new position
|
|
self.curframe.f_lineno = arg
|
|
self.stack[self.curindex] = self.stack[self.curindex][0], arg
|
|
self.print_stack_entry(self.stack[self.curindex])
|
|
except ValueError as e:
|
|
print('*** Jump failed:', e, file=self.stdout)
|
|
do_j = do_jump
|
|
|
|
def do_debug(self, arg):
|
|
sys.settrace(None)
|
|
globals = self.curframe.f_globals
|
|
locals = self.curframe_locals
|
|
p = Pdb(self.completekey, self.stdin, self.stdout)
|
|
p.prompt = "(%s) " % self.prompt.strip()
|
|
print("ENTERING RECURSIVE DEBUGGER", file=self.stdout)
|
|
sys.call_tracing(p.run, (arg, globals, locals))
|
|
print("LEAVING RECURSIVE DEBUGGER", file=self.stdout)
|
|
sys.settrace(self.trace_dispatch)
|
|
self.lastcmd = p.lastcmd
|
|
|
|
def do_quit(self, arg):
|
|
self._user_requested_quit = 1
|
|
self.set_quit()
|
|
return 1
|
|
|
|
do_q = do_quit
|
|
do_exit = do_quit
|
|
|
|
def do_EOF(self, arg):
|
|
print(file=self.stdout)
|
|
self._user_requested_quit = 1
|
|
self.set_quit()
|
|
return 1
|
|
|
|
def do_args(self, arg):
|
|
co = self.curframe.f_code
|
|
dict = self.curframe_locals
|
|
n = co.co_argcount
|
|
if co.co_flags & 4: n = n+1
|
|
if co.co_flags & 8: n = n+1
|
|
for i in range(n):
|
|
name = co.co_varnames[i]
|
|
print(name, '=', end=' ', file=self.stdout)
|
|
if name in dict: print(dict[name], file=self.stdout)
|
|
else: print("*** undefined ***", file=self.stdout)
|
|
do_a = do_args
|
|
|
|
def do_retval(self, arg):
|
|
if '__return__' in self.curframe_locals:
|
|
print(self.curframe_locals['__return__'], file=self.stdout)
|
|
else:
|
|
print('*** Not yet returned!', file=self.stdout)
|
|
do_rv = do_retval
|
|
|
|
def _getval(self, arg):
|
|
try:
|
|
return eval(arg, self.curframe.f_globals, self.curframe_locals)
|
|
except:
|
|
t, v = sys.exc_info()[:2]
|
|
if isinstance(t, str):
|
|
exc_type_name = t
|
|
else: exc_type_name = t.__name__
|
|
print('***', exc_type_name + ':', repr(v), file=self.stdout)
|
|
raise
|
|
|
|
def do_p(self, arg):
|
|
try:
|
|
print(repr(self._getval(arg)), file=self.stdout)
|
|
except:
|
|
pass
|
|
# make "print" an alias of "p" since print isn't a Python statement anymore
|
|
do_print = do_p
|
|
|
|
def do_pp(self, arg):
|
|
try:
|
|
pprint.pprint(self._getval(arg), self.stdout)
|
|
except:
|
|
pass
|
|
|
|
def do_list(self, arg):
|
|
self.lastcmd = 'list'
|
|
last = None
|
|
if arg:
|
|
try:
|
|
x = eval(arg, {}, {})
|
|
if type(x) == type(()):
|
|
first, last = x
|
|
first = int(first)
|
|
last = int(last)
|
|
if last < first:
|
|
# Assume it's a count
|
|
last = first + last
|
|
else:
|
|
first = max(1, int(x) - 5)
|
|
except:
|
|
print('*** Error in argument:', repr(arg), file=self.stdout)
|
|
return
|
|
elif self.lineno is None:
|
|
first = max(1, self.curframe.f_lineno - 5)
|
|
else:
|
|
first = self.lineno + 1
|
|
if last is None:
|
|
last = first + 10
|
|
filename = self.curframe.f_code.co_filename
|
|
breaklist = self.get_file_breaks(filename)
|
|
try:
|
|
for lineno in range(first, last+1):
|
|
line = linecache.getline(filename, lineno,
|
|
self.curframe.f_globals)
|
|
if not line:
|
|
print('[EOF]', file=self.stdout)
|
|
break
|
|
else:
|
|
s = repr(lineno).rjust(3)
|
|
if len(s) < 4: s = s + ' '
|
|
if lineno in breaklist: s = s + 'B'
|
|
else: s = s + ' '
|
|
if lineno == self.curframe.f_lineno:
|
|
s = s + '->'
|
|
print(s + '\t' + line, end='', file=self.stdout)
|
|
self.lineno = lineno
|
|
except KeyboardInterrupt:
|
|
pass
|
|
do_l = do_list
|
|
|
|
def do_whatis(self, arg):
|
|
try:
|
|
value = eval(arg, self.curframe.f_globals,
|
|
self.curframe_locals)
|
|
except:
|
|
t, v = sys.exc_info()[:2]
|
|
if type(t) == type(''):
|
|
exc_type_name = t
|
|
else: exc_type_name = t.__name__
|
|
print('***', exc_type_name + ':', repr(v), file=self.stdout)
|
|
return
|
|
code = None
|
|
# Is it a function?
|
|
try: code = value.__code__
|
|
except: pass
|
|
if code:
|
|
print('Function', code.co_name, file=self.stdout)
|
|
return
|
|
# Is it an instance method?
|
|
try: code = value.__func__.__code__
|
|
except: pass
|
|
if code:
|
|
print('Method', code.co_name, file=self.stdout)
|
|
return
|
|
# None of the above...
|
|
print(type(value), file=self.stdout)
|
|
|
|
def do_alias(self, arg):
|
|
args = arg.split()
|
|
if len(args) == 0:
|
|
keys = sorted(self.aliases.keys())
|
|
for alias in keys:
|
|
print("%s = %s" % (alias, self.aliases[alias]), file=self.stdout)
|
|
return
|
|
if args[0] in self.aliases and len(args) == 1:
|
|
print("%s = %s" % (args[0], self.aliases[args[0]]), file=self.stdout)
|
|
else:
|
|
self.aliases[args[0]] = ' '.join(args[1:])
|
|
|
|
def do_unalias(self, arg):
|
|
args = arg.split()
|
|
if len(args) == 0: return
|
|
if args[0] in self.aliases:
|
|
del self.aliases[args[0]]
|
|
|
|
#list of all the commands making the program resume execution.
|
|
commands_resuming = ['do_continue', 'do_step', 'do_next', 'do_return',
|
|
'do_quit', 'do_jump']
|
|
|
|
# Print a traceback starting at the top stack frame.
|
|
# The most recently entered frame is printed last;
|
|
# this is different from dbx and gdb, but consistent with
|
|
# the Python interpreter's stack trace.
|
|
# It is also consistent with the up/down commands (which are
|
|
# compatible with dbx and gdb: up moves towards 'main()'
|
|
# and down moves towards the most recent stack frame).
|
|
|
|
def print_stack_trace(self):
|
|
try:
|
|
for frame_lineno in self.stack:
|
|
self.print_stack_entry(frame_lineno)
|
|
except KeyboardInterrupt:
|
|
pass
|
|
|
|
def print_stack_entry(self, frame_lineno, prompt_prefix=line_prefix):
|
|
frame, lineno = frame_lineno
|
|
if frame is self.curframe:
|
|
print('>', end=' ', file=self.stdout)
|
|
else:
|
|
print(' ', end=' ', file=self.stdout)
|
|
print(self.format_stack_entry(frame_lineno,
|
|
prompt_prefix), file=self.stdout)
|
|
|
|
|
|
# Help methods (derived from pdb.doc)
|
|
|
|
def help_help(self):
|
|
self.help_h()
|
|
|
|
def help_h(self):
|
|
print("""h(elp)
|
|
Without argument, print the list of available commands.
|
|
With a command name as argument, print help about that command
|
|
"help pdb" pipes the full documentation file to the $PAGER
|
|
"help exec" gives help on the ! command""", file=self.stdout)
|
|
|
|
def help_where(self):
|
|
self.help_w()
|
|
|
|
def help_w(self):
|
|
print("""w(here)
|
|
Print a stack trace, with the most recent frame at the bottom.
|
|
An arrow indicates the "current frame", which determines the
|
|
context of most commands. 'bt' is an alias for this command.""", file=self.stdout)
|
|
|
|
help_bt = help_w
|
|
|
|
def help_down(self):
|
|
self.help_d()
|
|
|
|
def help_d(self):
|
|
print("""d(own)
|
|
Move the current frame one level down in the stack trace
|
|
(to a newer frame).""", file=self.stdout)
|
|
|
|
def help_up(self):
|
|
self.help_u()
|
|
|
|
def help_u(self):
|
|
print("""u(p)
|
|
Move the current frame one level up in the stack trace
|
|
(to an older frame).""", file=self.stdout)
|
|
|
|
def help_break(self):
|
|
self.help_b()
|
|
|
|
def help_b(self):
|
|
print("""b(reak) ([file:]lineno | function) [, condition]
|
|
With a line number argument, set a break there in the current
|
|
file. With a function name, set a break at first executable line
|
|
of that function. Without argument, list all breaks. If a second
|
|
argument is present, it is a string specifying an expression
|
|
which must evaluate to true before the breakpoint is honored.
|
|
|
|
The line number may be prefixed with a filename and a colon,
|
|
to specify a breakpoint in another file (probably one that
|
|
hasn't been loaded yet). The file is searched for on sys.path;
|
|
the .py suffix may be omitted.""", file=self.stdout)
|
|
|
|
def help_clear(self):
|
|
self.help_cl()
|
|
|
|
def help_cl(self):
|
|
print("cl(ear) filename:lineno", file=self.stdout)
|
|
print("""cl(ear) [bpnumber [bpnumber...]]
|
|
With a space separated list of breakpoint numbers, clear
|
|
those breakpoints. Without argument, clear all breaks (but
|
|
first ask confirmation). With a filename:lineno argument,
|
|
clear all breaks at that line in that file.""", file=self.stdout)
|
|
|
|
def help_tbreak(self):
|
|
print("""tbreak same arguments as break, but breakpoint is
|
|
removed when first hit.""", file=self.stdout)
|
|
|
|
def help_enable(self):
|
|
print("""enable bpnumber [bpnumber ...]
|
|
Enables the breakpoints given as a space separated list of
|
|
bp numbers.""", file=self.stdout)
|
|
|
|
def help_disable(self):
|
|
print("""disable bpnumber [bpnumber ...]
|
|
Disables the breakpoints given as a space separated list of
|
|
bp numbers.""", file=self.stdout)
|
|
|
|
def help_ignore(self):
|
|
print("""ignore bpnumber count
|
|
Sets the ignore count for the given breakpoint number. A breakpoint
|
|
becomes active when the ignore count is zero. When non-zero, the
|
|
count is decremented each time the breakpoint is reached and the
|
|
breakpoint is not disabled and any associated condition evaluates
|
|
to true.""", file=self.stdout)
|
|
|
|
def help_condition(self):
|
|
print("""condition bpnumber str_condition
|
|
str_condition is a string specifying an expression which
|
|
must evaluate to true before the breakpoint is honored.
|
|
If str_condition is absent, any existing condition is removed;
|
|
i.e., the breakpoint is made unconditional.""", file=self.stdout)
|
|
|
|
def help_step(self):
|
|
self.help_s()
|
|
|
|
def help_s(self):
|
|
print("""s(tep)
|
|
Execute the current line, stop at the first possible occasion
|
|
(either in a function that is called or in the current function).""", file=self.stdout)
|
|
|
|
def help_until(self):
|
|
self.help_unt()
|
|
|
|
def help_unt(self):
|
|
print("""unt(il)
|
|
Continue execution until the line with a number greater than the current
|
|
one is reached or until the current frame returns""")
|
|
|
|
def help_next(self):
|
|
self.help_n()
|
|
|
|
def help_n(self):
|
|
print("""n(ext)
|
|
Continue execution until the next line in the current function
|
|
is reached or it returns.""", file=self.stdout)
|
|
|
|
def help_return(self):
|
|
self.help_r()
|
|
|
|
def help_r(self):
|
|
print("""r(eturn)
|
|
Continue execution until the current function returns.""", file=self.stdout)
|
|
|
|
def help_continue(self):
|
|
self.help_c()
|
|
|
|
def help_cont(self):
|
|
self.help_c()
|
|
|
|
def help_c(self):
|
|
print("""c(ont(inue))
|
|
Continue execution, only stop when a breakpoint is encountered.""", file=self.stdout)
|
|
|
|
def help_jump(self):
|
|
self.help_j()
|
|
|
|
def help_j(self):
|
|
print("""j(ump) lineno
|
|
Set the next line that will be executed.""", file=self.stdout)
|
|
|
|
def help_debug(self):
|
|
print("""debug code
|
|
Enter a recursive debugger that steps through the code argument
|
|
(which is an arbitrary expression or statement to be executed
|
|
in the current environment).""", file=self.stdout)
|
|
|
|
def help_list(self):
|
|
self.help_l()
|
|
|
|
def help_l(self):
|
|
print("""l(ist) [first [,last]]
|
|
List source code for the current file.
|
|
Without arguments, list 11 lines around the current line
|
|
or continue the previous listing.
|
|
With one argument, list 11 lines starting at that line.
|
|
With two arguments, list the given range;
|
|
if the second argument is less than the first, it is a count.""", file=self.stdout)
|
|
|
|
def help_args(self):
|
|
self.help_a()
|
|
|
|
def help_a(self):
|
|
print("""a(rgs)
|
|
Print the arguments of the current function.""", file=self.stdout)
|
|
|
|
def help_p(self):
|
|
print("""p(rint) expression
|
|
Print the value of the expression.""", file=self.stdout)
|
|
|
|
def help_pp(self):
|
|
print("""pp expression
|
|
Pretty-print the value of the expression.""", file=self.stdout)
|
|
|
|
def help_exec(self):
|
|
print("""(!) statement
|
|
Execute the (one-line) statement in the context of
|
|
the current stack frame.
|
|
The exclamation point can be omitted unless the first word
|
|
of the statement resembles a debugger command.
|
|
To assign to a global variable you must always prefix the
|
|
command with a 'global' command, e.g.:
|
|
(Pdb) global list_options; list_options = ['-l']
|
|
(Pdb)""", file=self.stdout)
|
|
|
|
def help_run(self):
|
|
print("""run [args...]
|
|
Restart the debugged python program. If a string is supplied, it is
|
|
splitted with "shlex" and the result is used as the new sys.argv.
|
|
History, breakpoints, actions and debugger options are preserved.
|
|
"restart" is an alias for "run".""")
|
|
|
|
help_restart = help_run
|
|
|
|
def help_quit(self):
|
|
self.help_q()
|
|
|
|
def help_q(self):
|
|
print("""q(uit) or exit - Quit from the debugger.
|
|
The program being executed is aborted.""", file=self.stdout)
|
|
|
|
help_exit = help_q
|
|
|
|
def help_whatis(self):
|
|
print("""whatis arg
|
|
Prints the type of the argument.""", file=self.stdout)
|
|
|
|
def help_EOF(self):
|
|
print("""EOF
|
|
Handles the receipt of EOF as a command.""", file=self.stdout)
|
|
|
|
def help_alias(self):
|
|
print("""alias [name [command [parameter parameter ...] ]]
|
|
Creates an alias called 'name' the executes 'command'. The command
|
|
must *not* be enclosed in quotes. Replaceable parameters are
|
|
indicated by %1, %2, and so on, while %* is replaced by all the
|
|
parameters. If no command is given, the current alias for name
|
|
is shown. If no name is given, all aliases are listed.
|
|
|
|
Aliases may be nested and can contain anything that can be
|
|
legally typed at the pdb prompt. Note! You *can* override
|
|
internal pdb commands with aliases! Those internal commands
|
|
are then hidden until the alias is removed. Aliasing is recursively
|
|
applied to the first word of the command line; all other words
|
|
in the line are left alone.
|
|
|
|
Some useful aliases (especially when placed in the .pdbrc file) are:
|
|
|
|
#Print instance variables (usage "pi classInst")
|
|
alias pi for k in %1.__dict__.keys(): print "%1.",k,"=",%1.__dict__[k]
|
|
|
|
#Print instance variables in self
|
|
alias ps pi self
|
|
""", file=self.stdout)
|
|
|
|
def help_unalias(self):
|
|
print("""unalias name
|
|
Deletes the specified alias.""", file=self.stdout)
|
|
|
|
def help_commands(self):
|
|
print("""commands [bpnumber]
|
|
(com) ...
|
|
(com) end
|
|
(Pdb)
|
|
|
|
Specify a list of commands for breakpoint number bpnumber. The
|
|
commands themselves appear on the following lines. Type a line
|
|
containing just 'end' to terminate the commands.
|
|
|
|
To remove all commands from a breakpoint, type commands and
|
|
follow it immediately with end; that is, give no commands.
|
|
|
|
With no bpnumber argument, commands refers to the last
|
|
breakpoint set.
|
|
|
|
You can use breakpoint commands to start your program up again.
|
|
Simply use the continue command, or step, or any other
|
|
command that resumes execution.
|
|
|
|
Specifying any command resuming execution (currently continue,
|
|
step, next, return, jump, quit and their abbreviations) terminates
|
|
the command list (as if that command was immediately followed by end).
|
|
This is because any time you resume execution
|
|
(even with a simple next or step), you may encounter
|
|
another breakpoint--which could have its own command list, leading to
|
|
ambiguities about which list to execute.
|
|
|
|
If you use the 'silent' command in the command list, the
|
|
usual message about stopping at a breakpoint is not printed. This may
|
|
be desirable for breakpoints that are to print a specific message and
|
|
then continue. If none of the other commands print anything, you
|
|
see no sign that the breakpoint was reached.
|
|
""", file=self.stdout)
|
|
|
|
def help_pdb(self):
|
|
help()
|
|
|
|
def lookupmodule(self, filename):
|
|
"""Helper function for break/clear parsing -- may be overridden.
|
|
|
|
lookupmodule() translates (possibly incomplete) file or module name
|
|
into an absolute file name.
|
|
"""
|
|
if os.path.isabs(filename) and os.path.exists(filename):
|
|
return filename
|
|
f = os.path.join(sys.path[0], filename)
|
|
if os.path.exists(f) and self.canonic(f) == self.mainpyfile:
|
|
return f
|
|
root, ext = os.path.splitext(filename)
|
|
if ext == '':
|
|
filename = filename + '.py'
|
|
if os.path.isabs(filename):
|
|
return filename
|
|
for dirname in sys.path:
|
|
while os.path.islink(dirname):
|
|
dirname = os.readlink(dirname)
|
|
fullname = os.path.join(dirname, filename)
|
|
if os.path.exists(fullname):
|
|
return fullname
|
|
return None
|
|
|
|
def _runscript(self, filename):
|
|
# The script has to run in __main__ namespace (or imports from
|
|
# __main__ will break).
|
|
#
|
|
# So we clear up the __main__ and set several special variables
|
|
# (this gets rid of pdb's globals and cleans old variables on restarts).
|
|
import __main__
|
|
__main__.__dict__.clear()
|
|
__main__.__dict__.update({"__name__" : "__main__",
|
|
"__file__" : filename,
|
|
"__builtins__": __builtins__,
|
|
})
|
|
|
|
# When bdb sets tracing, a number of call and line events happens
|
|
# BEFORE debugger even reaches user's code (and the exact sequence of
|
|
# events depends on python version). So we take special measures to
|
|
# avoid stopping before we reach the main script (see user_line and
|
|
# user_call for details).
|
|
self._wait_for_mainpyfile = 1
|
|
self.mainpyfile = self.canonic(filename)
|
|
self._user_requested_quit = 0
|
|
with open(filename, "rb") as fp:
|
|
statement = "exec(compile(%r, %r, 'exec'))" % \
|
|
(fp.read(), self.mainpyfile)
|
|
self.run(statement)
|
|
|
|
# Simplified interface
|
|
|
|
def run(statement, globals=None, locals=None):
|
|
Pdb().run(statement, globals, locals)
|
|
|
|
def runeval(expression, globals=None, locals=None):
|
|
return Pdb().runeval(expression, globals, locals)
|
|
|
|
def runctx(statement, globals, locals):
|
|
# B/W compatibility
|
|
run(statement, globals, locals)
|
|
|
|
def runcall(*args, **kwds):
|
|
return Pdb().runcall(*args, **kwds)
|
|
|
|
def set_trace():
|
|
Pdb().set_trace(sys._getframe().f_back)
|
|
|
|
# Post-Mortem interface
|
|
|
|
def post_mortem(t=None):
|
|
# handling the default
|
|
if t is None:
|
|
# sys.exc_info() returns (type, value, traceback) if an exception is
|
|
# being handled, otherwise it returns None
|
|
t = sys.exc_info()[2]
|
|
if t is None:
|
|
raise ValueError("A valid traceback must be passed if no "
|
|
"exception is being handled")
|
|
|
|
p = Pdb()
|
|
p.reset()
|
|
p.interaction(None, t)
|
|
|
|
def pm():
|
|
post_mortem(sys.last_traceback)
|
|
|
|
|
|
# Main program for testing
|
|
|
|
TESTCMD = 'import x; x.main()'
|
|
|
|
def test():
|
|
run(TESTCMD)
|
|
|
|
# print help
|
|
def help():
|
|
for dirname in sys.path:
|
|
fullname = os.path.join(dirname, 'pdb.doc')
|
|
if os.path.exists(fullname):
|
|
sts = os.system('${PAGER-more} '+fullname)
|
|
if sts: print('*** Pager exit status:', sts)
|
|
break
|
|
else:
|
|
print('Sorry, can\'t find the help file "pdb.doc"', end=' ')
|
|
print('along the Python search path')
|
|
|
|
def main():
|
|
if not sys.argv[1:] or sys.argv[1] in ("--help", "-h"):
|
|
print("usage: pdb.py scriptfile [arg] ...")
|
|
sys.exit(2)
|
|
|
|
mainpyfile = sys.argv[1] # Get script filename
|
|
if not os.path.exists(mainpyfile):
|
|
print('Error:', mainpyfile, 'does not exist')
|
|
sys.exit(1)
|
|
|
|
del sys.argv[0] # Hide "pdb.py" from argument list
|
|
|
|
# Replace pdb's dir with script's dir in front of module search path.
|
|
sys.path[0] = os.path.dirname(mainpyfile)
|
|
|
|
# Note on saving/restoring sys.argv: it's a good idea when sys.argv was
|
|
# modified by the script being debugged. It's a bad idea when it was
|
|
# changed by the user from the command line. There is a "restart" command
|
|
# which allows explicit specification of command line arguments.
|
|
pdb = Pdb()
|
|
while 1:
|
|
try:
|
|
pdb._runscript(mainpyfile)
|
|
if pdb._user_requested_quit:
|
|
break
|
|
print("The program finished and will be restarted")
|
|
except Restart:
|
|
print("Restarting", mainpyfile, "with arguments:")
|
|
print("\t" + " ".join(sys.argv[1:]))
|
|
except SystemExit:
|
|
# In most cases SystemExit does not warrant a post-mortem session.
|
|
print("The program exited via sys.exit(). Exit status: ", end=' ')
|
|
print(sys.exc_info()[1])
|
|
except:
|
|
traceback.print_exc()
|
|
print("Uncaught exception. Entering post mortem debugging")
|
|
print("Running 'cont' or 'step' will restart the program")
|
|
t = sys.exc_info()[2]
|
|
pdb.interaction(None, t)
|
|
print("Post mortem debugger finished. The " + mainpyfile +
|
|
" will be restarted")
|
|
|
|
|
|
# When invoked as main program, invoke the debugger on a script
|
|
if __name__ == '__main__':
|
|
import pdb
|
|
pdb.main()
|