gdb/python: allow for catchpoint type breakpoints in python

This commit adds initial support for catchpoints to the python
breakpoint API.

This commit adds a BP_CATCHPOINT constant which corresponds to
GDB's internal bp_catchpoint.  The new constant is documented in the
manual.

The user can't create breakpoints with type BP_CATCHPOINT after this
commit, but breakpoints that already exist, obtained with the
`gdb.breakpoints` function, can now have this type.  Additionally,
when a stop event is reported for hitting a catchpoint, GDB will now
report a BreakpointEvent with the attached breakpoint being of type
BP_CATCHPOINT - previously GDB would report a generic StopEvent in
this situation.

gdb/ChangeLog:

	* NEWS: Mention Python BP_CATCHPOINT feature.
	* python/py-breakpoint.c (pybp_codes): Add bp_catchpoint support.
	(bppy_init): Likewise.
	(gdbpy_breakpoint_created): Likewise.

gdb/doc/ChangeLog:

	* python.texinfo (Breakpoints In Python): Add BP_CATCHPOINT
	description.

gdb/testsuite/ChangeLog:

	* gdb.python/py-breakpoint.c (do_throw): New function.
	(main): Call do_throw.
	* gdb.python/py-breakpoint.exp (test_catchpoints): New proc.

1 files changed, 5 insertions, 1 deletions

diff --git a/gdb/python/py-breakpoint.c b/gdb/python/py-breakpoint.c
index a2ce4cd..edff032 100644
--- a/gdb/python/py-breakpoint.c
+++ b/gdb/python/py-breakpoint.c
@@ -86,6 +86,7 @@ static struct pybp_code pybp_codes[] =
   { "BP_HARDWARE_WATCHPOINT", bp_hardware_watchpoint},
   { "BP_READ_WATCHPOINT", bp_read_watchpoint},
   { "BP_ACCESS_WATCHPOINT", bp_access_watchpoint},
+  { "BP_CATCHPOINT", bp_catchpoint},
   {NULL} /* Sentinel.  */
 };
 
@@ -883,6 +884,8 @@ bppy_init (PyObject *self, PyObject *args, PyObject *kwargs)
 	      error(_("Cannot understand watchpoint access type."));
 	    break;
 	  }
+	case bp_catchpoint:
+	  error (_("BP_CATCHPOINT not supported"));
 	default:
 	  error(_("Do not understand breakpoint type to set."));
 	}
@@ -1038,7 +1041,8 @@ gdbpy_breakpoint_created (struct breakpoint *bp)
       && bp->type != bp_watchpoint
       && bp->type != bp_hardware_watchpoint
       && bp->type != bp_read_watchpoint
-      && bp->type != bp_access_watchpoint)
+      && bp->type != bp_access_watchpoint
+      && bp->type != bp_catchpoint)
     {
       pybp_debug_printf ("is not a breakpoint or watchpoint");
       return;