Merged revisions 86861 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r86861 | senthil.kumaran | 2010-11-29 19:54:17 +0800 (Mon, 29 Nov 2010) | 5 lines

  Fix #10561 - Fix pdb behavior. Delete the breakpoints by breakpoint number.
  Handle multiple breakpoints at same line. Update docs/test.
  Patch by Xavier de Gaye.
........

Doc/library/pdb.rst

@@ -239,7 +239,8 @@ tbreak [[*filename*:]\ *lineno* | *function*\ [, *condition*]]
    Temporary breakpoint, which is removed automatically when it is first hit.  The
    arguments are the same as break.
 
-cl(ear) [*bpnumber* [*bpnumber ...*]]
+cl(ear) [*filename:lineno* | *bpnumber* [*bpnumber ...*]]
+   With a *filename:lineno* argument, clear all the breakpoints at this line.
    With a space separated list of breakpoint numbers, clear those breakpoints.
    Without argument, clear all breaks (but first ask confirmation).
 

Lib/bdb.py

@@ -250,6 +250,12 @@ class Bdb:
             list.append(lineno)
         bp = Breakpoint(filename, lineno, temporary, cond, funcname)
 
+    def _prune_breaks(self, filename, lineno):
+        if (filename, lineno) not in Breakpoint.bplist:
+            self.breaks[filename].remove(lineno)
+        if not self.breaks[filename]:
+            del self.breaks[filename]
+
     def clear_break(self, filename, lineno):
         filename = self.canonic(filename)
         if not filename in self.breaks:
@@ -261,10 +267,7 @@ class Bdb:
         # pair, then remove the breaks entry
         for bp in Breakpoint.bplist[filename, lineno][:]:
             bp.deleteMe()
-        if (filename, lineno) not in Breakpoint.bplist:
-            self.breaks[filename].remove(lineno)
-        if not self.breaks[filename]:
-            del self.breaks[filename]
+        self._prune_breaks(filename, lineno)
 
     def clear_bpbynumber(self, arg):
         try:
@@ -277,7 +280,8 @@ class Bdb:
             return 'Breakpoint number (%d) out of range' % number
         if not bp:
             return 'Breakpoint (%d) already deleted' % number
-        self.clear_break(bp.file, bp.line)
+        bp.deleteMe()
+        self._prune_breaks(bp.file, bp.line)
 
     def clear_all_file_breaks(self, filename):
         filename = self.canonic(filename)

Lib/test/test_pdb.py

@@ -54,6 +54,108 @@ def test_pdb_displayhook():
     (Pdb) continue
     """
 
+def test_pdb_breakpoint_commands():
+    """Test basic commands related to breakpoints.
+
+    >>> def test_function():
+    ...     import pdb; pdb.Pdb().set_trace()
+    ...     print(1)
+    ...     print(2)
+    ...     print(3)
+    ...     print(4)
+
+    First, need to clear bdb state that might be left over from previous tests.
+    Otherwise, the new breakpoints might get assigned different numbers.
+
+    >>> from bdb import Breakpoint
+    >>> Breakpoint.next = 1
+    >>> Breakpoint.bplist = {}
+    >>> Breakpoint.bpbynumber = [None]
+
+    Now test the breakpoint commands.  NORMALIZE_WHITESPACE is needed because
+    the breakpoint list outputs a tab for the "stop only" and "ignore next"
+    lines, which we don't want to put in here.
+
+    >>> with PdbTestInput([  # doctest: +NORMALIZE_WHITESPACE
+    ...     'break 3',
+    ...     'disable 1',
+    ...     'ignore 1 10',
+    ...     'condition 1 1 < 2',
+    ...     'break 4',
+    ...     'break 4',
+    ...     'break',
+    ...     'clear 3',
+    ...     'break',
+    ...     'condition 1',
+    ...     'enable 1',
+    ...     'clear 1',
+    ...     'commands 2',
+    ...     'print 42',
+    ...     'end',
+    ...     'continue',  # will stop at breakpoint 2 (line 4)
+    ...     'clear',     # clear all!
+    ...     'y',
+    ...     'tbreak 5',
+    ...     'continue',  # will stop at temporary breakpoint
+    ...     'break',     # make sure breakpoint is gone
+    ...     'continue',
+    ... ]):
+    ...    test_function()
+    > <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(3)test_function()
+    -> print(1)
+    (Pdb) break 3
+    Breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
+    (Pdb) disable 1
+    (Pdb) ignore 1 10
+    Will ignore next 10 crossings of breakpoint 1.
+    (Pdb) condition 1 1 < 2
+    (Pdb) break 4
+    Breakpoint 2 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
+    (Pdb) break 4
+    Breakpoint 3 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
+    (Pdb) break
+    Num Type         Disp Enb   Where
+    1   breakpoint   keep no    at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
+            stop only if 1 < 2
+            ignore next 10 hits
+    2   breakpoint   keep yes   at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
+    3   breakpoint   keep yes   at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
+    (Pdb) clear 3
+    Deleted breakpoint 3
+    (Pdb) break
+    Num Type         Disp Enb   Where
+    1   breakpoint   keep no    at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
+            stop only if 1 < 2
+            ignore next 10 hits
+    2   breakpoint   keep yes   at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
+    (Pdb) condition 1
+    Breakpoint 1 is now unconditional.
+    (Pdb) enable 1
+    (Pdb) clear 1
+    Deleted breakpoint 1
+    (Pdb) commands 2
+    (com) print 42
+    (com) end
+    (Pdb) continue
+    1
+    42
+    > <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(4)test_function()
+    -> print(2)
+    (Pdb) clear
+    Clear all breaks? y
+    (Pdb) tbreak 5
+    Breakpoint 4 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:5
+    (Pdb) continue
+    2
+    Deleted breakpoint 4
+    > <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(5)test_function()
+    -> print(3)
+    (Pdb) break
+    (Pdb) continue
+    3
+    4
+    """
+
 
 def test_pdb_skip_modules():
     """This illustrates the simple case of module skipping.
@@ -138,6 +240,14 @@ def test_pdb_continue_in_bottomframe():
     ...     print(3)
     ...     print(4)
 
+    First, need to clear bdb state that might be left over from previous tests.
+    Otherwise, the new breakpoints might get assigned different numbers.
+
+    >>> from bdb import Breakpoint
+    >>> Breakpoint.next = 1
+    >>> Breakpoint.bplist = {}
+    >>> Breakpoint.bpbynumber = [None]
+
     >>> with PdbTestInput([
     ...     'next',
     ...     'break 7',

Misc/NEWS

@@ -28,6 +28,8 @@ Library
 
 - Issue #6098: Don't claim DOM level 3 conformance in minidom.
 
+- Issue #10561: In pdb, clear the breakpoints by the breakpoint number.
+
 - Issue #5762: Fix AttributeError raised by ``xml.dom.minidom`` when an empty
   XML namespace attribute is encountered.