Python PR/12199

[Phil Muldoon <pmuldoon@redhat.com>]

Hi,

This patch allows users to delete a breakpoint from the Python API
(assuming that breakpoint type is tracked by the API).

OK?

Cheers

Phil

--

2010-11-15  Phil Muldoon  <pmuldoon@redhat.com>

        PR python/12199

	* python/py-breakpoint.c (bppy_delete_breakpoint): New function.

2010-11-15  Phil Muldoon  <pmuldoon@redhat.com>

        PR python/12199

	* gdb.python/py-breakpoint.exp: Test the delete method.

2010-11-15  Phil Muldoon  <pmuldoon@redhat.com>

        PR python/12199

	* gdb.texinfo (Breakpoints In Python): Document "delete" method.

--

diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index ddc711b..5ffbcb7 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -22887,6 +22887,12 @@ watchpoint scope, the watchpoint remains valid even if execution of the
 inferior leaves the scope of that watchpoint.
 @end defmethod
 
+@defmethod Breakpoint delete
+Permanently deletes the @value{GDBN} breakpoint.  This also
+invalidates the Python @code{Breakpoint} object.  Any further access
+to this object's attributes or methods will raise an error.
+@end defmethod
+
 @defivar Breakpoint enabled
 This attribute is @code{True} if the breakpoint is enabled, and
 @code{False} otherwise.  This attribute is writable.
diff --git a/gdb/python/py-breakpoint.c b/gdb/python/py-breakpoint.c
index 8afa414..742c702 100644
--- a/gdb/python/py-breakpoint.c
+++ b/gdb/python/py-breakpoint.c
@@ -630,6 +630,22 @@ bppy_new (PyTypeObject *subtype, PyObject *args, PyObject *kwargs)
   return result;
 }
 
+/* Python function which deletes the underlying GDB breakpoint.  This
+   triggers the breakpoint_deleted observer which will call
+   gdbpy_breakpoint_deleted; that function cleans up the Python
+   sections.  */
+
+static PyObject *
+bppy_delete_breakpoint (PyObject *self, PyObject *args)
+{
+  breakpoint_object *self_bp = (breakpoint_object *) self;
+
+  BPPY_REQUIRE_VALID (self_bp);
+
+  delete_breakpoint (self_bp->bp);
+
+  Py_RETURN_NONE;
+}
+
 
 static int
@@ -843,6 +859,8 @@ static PyMethodDef breakpoint_object_methods[] =
 {
   { "is_valid", bppy_is_valid, METH_NOARGS,
     "Return true if this breakpoint is valid, false if not." },
+  { "delete", bppy_delete_breakpoint, METH_NOARGS,
+    "Delete the underlying GDB breakpoint." },
   { NULL } /* Sentinel.  */
 };
 
diff --git a/gdb/testsuite/gdb.python/py-breakpoint.exp b/gdb/testsuite/gdb.python/py-breakpoint.exp
index d030b55..34a64a3 100644
--- a/gdb/testsuite/gdb.python/py-breakpoint.exp
+++ b/gdb/testsuite/gdb.python/py-breakpoint.exp
@@ -91,6 +91,29 @@ if ![runto_main] then {
     return 0
 }
 
+# Test breakpoints are deleted correctly.
+set deltst_location [gdb_get_line_number "Break at multiply."]
+set end_location [gdb_get_line_number "Break at end."]
+gdb_py_test_silent_cmd  "python dp1 = gdb.Breakpoint (\"$deltst_location\")" "Set breakpoint" 0
+gdb_breakpoint [gdb_get_line_number "Break at end."]
+gdb_py_test_silent_cmd "python del_list = gdb.breakpoints()" "Get Breakpoint List" 0
+gdb_test "python print len(del_list)" "3" "Number of breakpoints before delete"
+gdb_continue_to_breakpoint "Break at multiply." ".*/$srcfile:$deltst_location.*"
+gdb_py_test_silent_cmd  "python dp1.delete()" "Delete Breakpoint" 0
+gdb_test "python print dp1.number" "RuntimeError: Breakpoint 2 is invalid.*" "Check breakpoint invalidated"
+gdb_py_test_silent_cmd "python del_list = gdb.breakpoints()" "Get Breakpoint List" 0
+gdb_test "python print len(del_list)" "2" "Number of breakpoints after delete"
+gdb_continue_to_breakpoint "Break at end." ".*/$srcfile:$end_location.*"
+
+
+# Start with a fresh gdb.
+clean_restart ${testfile}
+
+if ![runto_main] then {
+    fail "Cannot run to main."
+    return 0
+}
+
 # Test conditional setting.
 set bp_location1 [gdb_get_line_number "Break at multiply."]
 gdb_py_test_silent_cmd  "python bp1 = gdb.Breakpoint (\"$bp_location1\")" "Set breakpoint" 0