GDB (xrefs)
py-stopevent.c
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1 /* Python interface to inferior stop events.
2 
3  Copyright (C) 2009-2015 Free Software Foundation, Inc.
4 
5  This file is part of GDB.
6 
7  This program is free software; you can redistribute it and/or modify
8  it under the terms of the GNU General Public License as published by
9  the Free Software Foundation; either version 3 of the License, or
10  (at your option) any later version.
11 
12  This program is distributed in the hope that it will be useful,
13  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  GNU General Public License for more details.
16 
17  You should have received a copy of the GNU General Public License
18  along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 
20 #include "defs.h"
21 #include "py-stopevent.h"
22 
23 PyObject *
24 create_stop_event_object (PyTypeObject *py_type)
25 {
26  PyObject *stop_event_obj = create_thread_event_object (py_type);
27 
28  if (!stop_event_obj)
29  goto fail;
30 
31  return stop_event_obj;
32 
33  fail:
34  Py_XDECREF (stop_event_obj);
35  return NULL;
36 }
37 
38 /* Callback observers when a stop event occurs. This function will create a
39  new Python stop event object. If only a specific thread is stopped the
40  thread object of the event will be set to that thread. Otherwise, if all
41  threads are stopped thread object will be set to None.
42  return 0 if the event was created and emitted successfully otherwise
43  returns -1. */
44 
45 int
46 emit_stop_event (struct bpstats *bs, enum gdb_signal stop_signal)
47 {
48  PyObject *stop_event_obj = NULL; /* Appease GCC warning. */
49  PyObject *list = NULL;
50  PyObject *first_bp = NULL;
51  struct bpstats *current_bs;
52 
54  return 0;
55 
56  /* Add any breakpoint set at this location to the list. */
57  for (current_bs = bs; current_bs != NULL; current_bs = current_bs->next)
58  {
59  if (current_bs->breakpoint_at
60  && current_bs->breakpoint_at->py_bp_object)
61  {
62  PyObject *current_py_bp =
63  (PyObject *) current_bs->breakpoint_at->py_bp_object;
64 
65  if (list == NULL)
66  {
67  list = PyList_New (0);
68  if (!list)
69  goto fail;
70  }
71 
72  if (PyList_Append (list, current_py_bp))
73  goto fail;
74 
75  if (first_bp == NULL)
76  first_bp = current_py_bp;
77  }
78  }
79 
80  if (list != NULL)
81  {
82  stop_event_obj = create_breakpoint_event_object (list, first_bp);
83  if (!stop_event_obj)
84  goto fail;
85  Py_DECREF (list);
86  }
87 
88  /* Check if the signal is "Signal 0" or "Trace/breakpoint trap". */
89  if (stop_signal != GDB_SIGNAL_0
90  && stop_signal != GDB_SIGNAL_TRAP)
91  {
92  stop_event_obj =
93  create_signal_event_object (stop_signal);
94  if (!stop_event_obj)
95  goto fail;
96  }
97 
98  /* If all fails emit an unknown stop event. All event types should
99  be known and this should eventually be unused. */
100  if (!stop_event_obj)
101  {
102  stop_event_obj = create_stop_event_object (&stop_event_object_type);
103  if (!stop_event_obj)
104  goto fail;
105  }
106 
107  return evpy_emit_event (stop_event_obj, gdb_py_events.stop);
108 
109  fail:
110  Py_XDECREF (list);
111  return -1;
112 }
113 
115  "gdb.StopEvent",
116  "StopEvent",
117  "GDB stop event object",
118  thread_event_object_type);
#define Py_DECREF(op)
PyObject * create_signal_event_object(enum gdb_signal stop_signal)
if(!(yy_init))
Definition: ada-lex.c:1072
bpstat next
Definition: breakpoint.h:1072
PyObject * create_stop_event_object(PyTypeObject *py_type)
Definition: py-stopevent.c:24
struct gdbpy_breakpoint_object * py_bp_object
Definition: breakpoint.h:762
int emit_stop_event(struct bpstats *bs, enum gdb_signal stop_signal)
Definition: py-stopevent.c:46
eventregistry_object * stop
Definition: py-events.h:45
PyObject * create_breakpoint_event_object(PyObject *breakpoint_list, PyObject *first_bp)
Definition: py-bpevent.c:30
events_object gdb_py_events
struct breakpoint * breakpoint_at
Definition: breakpoint.h:1095
GDBPY_NEW_EVENT_TYPE(stop,"gdb.StopEvent","StopEvent","GDB stop event object", thread_event_object_type)
PyObject * create_thread_event_object(PyTypeObject *py_type)
int evpy_emit_event(PyObject *event, eventregistry_object *registry)
Definition: py-event.c:89
char stop
Definition: breakpoint.h:1107
int evregpy_no_listeners_p(eventregistry_object *registry)