gdb vendor branch: Bring in additional source files
[dragonfly.git] / contrib / gdb-7 / gdb / python / py-stopevent.c
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1/* Python interface to inferior stop events.
2
a45ae5f8 3 Copyright (C) 2009-2012 Free Software Foundation, Inc.
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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 "py-stopevent.h"
21
22PyObject *
23create_stop_event_object (PyTypeObject *py_type)
24{
25 PyObject *stop_event_obj = create_thread_event_object (py_type);
26
27 if (!stop_event_obj)
28 goto fail;
29
30 return stop_event_obj;
31
32 fail:
33 Py_XDECREF (stop_event_obj);
34 return NULL;
35}
36
37/* Callback observers when a stop event occurs. This function will create a
38 new Python stop event object. If only a specific thread is stopped the
39 thread object of the event will be set to that thread. Otherwise, if all
40 threads are stopped thread object will be set to None.
41 return 0 if the event was created and emitted successfully otherwise
42 returns -1. */
43
44int
45emit_stop_event (struct bpstats *bs, enum target_signal stop_signal)
46{
47 PyObject *stop_event_obj = NULL; /* Appease GCC warning. */
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48 PyObject *list = NULL;
49 PyObject *first_bp = NULL;
50 struct bpstats *current_bs;
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51
52 if (evregpy_no_listeners_p (gdb_py_events.stop))
53 return 0;
54
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55 /* Add any breakpoint set at this location to the list. */
56 for (current_bs = bs; current_bs != NULL; current_bs = current_bs->next)
c50c785c 57 {
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58 if (current_bs->breakpoint_at
59 && current_bs->breakpoint_at->py_bp_object)
60 {
61 PyObject *current_py_bp =
62 (PyObject *) current_bs->breakpoint_at->py_bp_object;
63
64 if (list == NULL)
65 {
66 list = PyList_New (0);
67 if (!list)
68 goto fail;
69 }
70
71 if (PyList_Append (list, current_py_bp))
72 goto fail;
73
74 if (first_bp == NULL)
75 first_bp = current_py_bp;
76 }
77 }
78
79 if (list != NULL)
80 {
81 stop_event_obj = create_breakpoint_event_object (list, first_bp);
c50c785c 82 if (!stop_event_obj)
a45ae5f8 83 goto fail;
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84 }
85
86 /* Check if the signal is "Signal 0" or "Trace/breakpoint trap". */
87 if (stop_signal != TARGET_SIGNAL_0
88 && stop_signal != TARGET_SIGNAL_TRAP)
89 {
90 stop_event_obj =
91 create_signal_event_object (stop_signal);
92 if (!stop_event_obj)
93 goto fail;
94 }
95
96 /* If all fails emit an unknown stop event. All event types should
97 be known and this should eventually be unused. */
98 if (!stop_event_obj)
99 {
100 stop_event_obj = create_stop_event_object (&stop_event_object_type);
101 if (!stop_event_obj)
a45ae5f8 102 goto fail;
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103 }
104
105 return evpy_emit_event (stop_event_obj, gdb_py_events.stop);
106
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107 fail:
108 Py_XDECREF (list);
109 return -1;
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110}
111
112GDBPY_NEW_EVENT_TYPE (stop,
113 "gdb.StopEvent",
114 "StopEvent",
115 "GDB stop event object",
116 thread_event_object_type,
117 /*no qual*/);