1 /* Python interface to inferior stop events. 2 3 Copyright (C) 2009-2023 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 gdbpy_ref<> 24 create_stop_event_object (PyTypeObject *py_type) 25 { 26 gdbpy_ref<> thread = py_get_event_thread (inferior_ptid); 27 return create_thread_event_object (py_type, thread.get ()); 28 } 29 30 /* Callback observers when a stop event occurs. This function will create a 31 new Python stop event object. If only a specific thread is stopped the 32 thread object of the event will be set to that thread. Otherwise, if all 33 threads are stopped thread object will be set to None. 34 return 0 if the event was created and emitted successfully otherwise 35 returns -1. */ 36 37 int 38 emit_stop_event (struct bpstat *bs, enum gdb_signal stop_signal) 39 { 40 gdbpy_ref<> stop_event_obj; 41 gdbpy_ref<> list; 42 PyObject *first_bp = NULL; 43 struct bpstat *current_bs; 44 45 if (evregpy_no_listeners_p (gdb_py_events.stop)) 46 return 0; 47 48 /* Add any breakpoint set at this location to the list. */ 49 for (current_bs = bs; current_bs != NULL; current_bs = current_bs->next) 50 { 51 if (current_bs->breakpoint_at 52 && current_bs->breakpoint_at->py_bp_object) 53 { 54 PyObject *current_py_bp = 55 (PyObject *) current_bs->breakpoint_at->py_bp_object; 56 57 if (list == NULL) 58 { 59 list.reset (PyList_New (0)); 60 if (list == NULL) 61 return -1; 62 } 63 64 if (PyList_Append (list.get (), current_py_bp)) 65 return -1; 66 67 if (first_bp == NULL) 68 first_bp = current_py_bp; 69 } 70 } 71 72 if (list != NULL) 73 { 74 stop_event_obj = create_breakpoint_event_object (list.get (), 75 first_bp); 76 if (stop_event_obj == NULL) 77 return -1; 78 } 79 80 /* Check if the signal is "Signal 0" or "Trace/breakpoint trap". */ 81 if (stop_signal != GDB_SIGNAL_0 82 && stop_signal != GDB_SIGNAL_TRAP) 83 { 84 stop_event_obj = create_signal_event_object (stop_signal); 85 if (stop_event_obj == NULL) 86 return -1; 87 } 88 89 /* If all fails emit an unknown stop event. All event types should 90 be known and this should eventually be unused. */ 91 if (stop_event_obj == NULL) 92 { 93 stop_event_obj = create_stop_event_object (&stop_event_object_type); 94 if (stop_event_obj == NULL) 95 return -1; 96 } 97 98 return evpy_emit_event (stop_event_obj.get (), gdb_py_events.stop); 99 } 100