Patch #1393667: pdb now has a "run" command which restarts the debugged
Python program, optionally with different arguments.
diff --git a/Lib/pdb.py b/Lib/pdb.py
index 2ec736b..5778c05 100755
--- a/Lib/pdb.py
+++ b/Lib/pdb.py
@@ -13,6 +13,12 @@
import re
import pprint
import traceback
+
+
+class Restart(Exception):
+ """Causes a debugger to be restarted for the debugged python program."""
+ pass
+
# Create a custom safe Repr instance and increase its maxstring.
# The default of 30 truncates error messages too easily.
_repr = Repr()
@@ -608,6 +614,18 @@
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
@@ -1012,6 +1030,15 @@
(Pdb) global list_options; list_options = ['-l']
(Pdb)"""
+ 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()
@@ -1204,9 +1231,8 @@
# 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. The best approach would be to
- # have a "restart" command which would allow explicit specification of
- # command line arguments.
+ # 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:
@@ -1214,6 +1240,9 @@
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: ",