3 Copyright (C) 2016-2018 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
20 #if !defined (GDB_OBSERVER_H)
21 #define GDB_OBSERVER_H
23 #include "common/observable.h"
30 struct trace_state_variable;
38 /* The inferior has stopped for real. The bs argument describes the
39 breakpoints were are stopped at, if any. Second argument
40 print_frame non-zero means display the location where the
43 gdb notifies all normal_stop observers when the inferior execution
44 has just stopped, the associated messages and annotations have been
45 printed, and the control is about to be returned to the user.
47 Note that the normal_stop notification is not emitted when the
48 execution stops due to a breakpoint, and this breakpoint has a
49 condition that is not met. If the breakpoint has any associated
50 commands list, the commands are executed after the notification is
52 extern observable<struct bpstats *, int> normal_stop;
54 /* The inferior was stopped by a signal. */
55 extern observable<enum gdb_signal> signal_received;
57 /* We are done with a step/next/si/ni command. */
58 extern observable<> end_stepping_range;
60 /* The inferior was terminated by a signal. */
61 extern observable<enum gdb_signal> signal_exited;
63 /* The inferior program is finished. */
64 extern observable<int> exited;
66 /* Reverse execution: target ran out of history info. */
67 extern observable<> no_history;
69 /* A synchronous command finished. */
70 extern observable<> sync_execution_done;
72 /* An error was caught while executing a command. */
73 extern observable<> command_error;
75 /* The target's register contents have changed. */
76 extern observable<struct target_ops *> target_changed;
78 /* The executable being debugged by GDB has changed: The user
79 decided to debug a different program, or the program he was
80 debugging has been modified since being loaded by the debugger
81 (by being recompiled, for instance). */
82 extern observable<> executable_changed;
84 /* gdb has just connected to an inferior. For 'run', gdb calls this
85 observer while the inferior is still stopped at the entry-point
86 instruction. For 'attach' and 'core', gdb calls this observer
87 immediately after connecting to the inferior, and before any
88 information on the inferior has been printed. */
89 extern observable<struct target_ops *, int> inferior_created;
91 /* The status of process record for inferior inferior in gdb has
92 changed. The process record is started if started is true, and
93 the process record is stopped if started is false.
95 When started is true, method indicates the short name of the
96 method used for recording. If the method supports multiple
97 formats, format indicates which one is being used, otherwise it
98 is NULL. When started is false, they are both NULL. */
99 extern observable<struct inferior *, int, const char *, const char *>
102 /* The shared library specified by solib has been loaded. Note that
103 when gdb calls this observer, the library's symbols probably
104 haven't been loaded yet. */
105 extern observable<struct so_list *> solib_loaded;
107 /* The shared library specified by solib has been unloaded. Note
108 that when gdb calls this observer, the library's symbols have not
109 been unloaded yet, and thus are still available. */
110 extern observable<struct so_list *> solib_unloaded;
112 /* The symbol file specified by objfile has been loaded. Called
113 with objfile equal to NULL to indicate previously loaded symbol
114 table data has now been invalidated. */
115 extern observable<struct objfile *> new_objfile;
117 /* The object file specified by objfile is about to be freed. */
118 extern observable<struct objfile *> free_objfile;
120 /* The thread specified by t has been created. */
121 extern observable<struct thread_info *> new_thread;
123 /* The thread specified by t has exited. The silent argument
124 indicates that gdb is removing the thread from its tables without
125 wanting to notify the user about it. */
126 extern observable<struct thread_info *, int> thread_exit;
128 /* An explicit stop request was issued to ptid. If ptid equals
129 minus_one_ptid, the request applied to all threads. If
130 ptid_is_pid(ptid) returns true, the request applied to all
131 threads of the process pointed at by ptid. Otherwise, the
132 request applied to the single thread pointed at by ptid. */
133 extern observable<ptid_t> thread_stop_requested;
135 /* The target was resumed. The ptid parameter specifies which
136 thread was resume, and may be RESUME_ALL if all threads are
138 extern observable<ptid_t> target_resumed;
140 /* The target is about to be proceeded. */
141 extern observable<> about_to_proceed;
143 /* A new breakpoint b has been created. */
144 extern observable<struct breakpoint *> breakpoint_created;
146 /* A breakpoint has been destroyed. The argument b is the
147 pointer to the destroyed breakpoint. */
148 extern observable<struct breakpoint *> breakpoint_deleted;
150 /* A breakpoint has been modified in some way. The argument b
151 is the modified breakpoint. */
152 extern observable<struct breakpoint *> breakpoint_modified;
154 /* The trace frame is changed to tfnum (e.g., by using the 'tfind'
155 command). If tfnum is negative, it means gdb resumes live
156 debugging. The number of the tracepoint associated with this
157 traceframe is tpnum. */
158 extern observable<int, int> traceframe_changed;
160 /* The current architecture has changed. The argument newarch is a
161 pointer to the new architecture. */
162 extern observable<struct gdbarch *> architecture_changed;
164 /* The thread's ptid has changed. The old_ptid parameter specifies
165 the old value, and new_ptid specifies the new value. */
166 extern observable<ptid_t, ptid_t> thread_ptid_changed;
168 /* The inferior inf has been added to the list of inferiors. At
169 this point, it might not be associated with any process. */
170 extern observable<struct inferior *> inferior_added;
172 /* The inferior identified by inf has been attached to a
174 extern observable<struct inferior *> inferior_appeared;
176 /* Either the inferior associated with inf has been detached from
177 the process, or the process has exited. */
178 extern observable<struct inferior *> inferior_exit;
180 /* The inferior inf has been removed from the list of inferiors.
181 This method is called immediately before freeing inf. */
182 extern observable<struct inferior *> inferior_removed;
184 /* Bytes from data to data + len have been written to the inferior
186 extern observable<struct inferior *, CORE_ADDR, ssize_t, const bfd_byte *>
189 /* Called before a top-level prompt is displayed. current_prompt is
190 the current top-level prompt. */
191 extern observable<const char *> before_prompt;
193 /* Variable gdb_datadir has been set. The value may not necessarily
195 extern observable<> gdb_datadir_changed;
197 /* The parameter of some 'set' commands in console are changed.
198 This method is called after a command 'set param value'. param
199 is the parameter of 'set' command, and value is the value of
200 changed parameter. */
201 extern observable<const char *, const char *> command_param_changed;
203 /* The new trace state variable tsv is created. */
204 extern observable<const struct trace_state_variable *> tsv_created;
206 /* The trace state variable tsv is deleted. If tsv is NULL, all
207 trace state variables are deleted. */
208 extern observable<const struct trace_state_variable *> tsv_deleted;
210 /* The trace state value tsv is modified. */
211 extern observable<const struct trace_state_variable *> tsv_modified;
213 /* An inferior function at address is about to be called in thread
215 extern observable<ptid_t, CORE_ADDR> inferior_call_pre;
217 /* The inferior function at address has just been called. This
218 observer is called even if the inferior exits during the call.
219 thread is the thread in which the function was called, which may
220 be different from the current thread. */
221 extern observable<ptid_t, CORE_ADDR> inferior_call_post;
223 /* A register in the inferior has been modified by the gdb user. */
224 extern observable<struct frame_info *, int> register_changed;
226 /* The user-selected inferior, thread and/or frame has changed. The
227 user_select_what flag specifies if the inferior, thread and/or
228 frame has changed. */
229 extern observable<user_selected_what> user_selected_context_changed;
231 } /* namespace observers */
233 } /* namespace gdb */
235 #endif /* GDB_OBSERVER_H */