1 /* Python interface to inferior stop events. 2 3 Copyright (C) 2009-2013 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 53 if (evregpy_no_listeners_p (gdb_py_events.stop)) 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 } 113 114 GDBPY_NEW_EVENT_TYPE (stop, 115 "gdb.StopEvent", 116 "StopEvent", 117 "GDB stop event object", 118 thread_event_object_type, 119 /*no qual*/); 120