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fb85cece22
Commit b60cea7 (Make target_wait options use enum flags) broke
deprecated_target_wait_hook usage: there's a commit comment telling
this hook has not been converted.
Rather than trying to mend it, this patch replaces the hook by two
target_wait observers:
target_pre_wait (ptid_t ptid)
target_post_wait (ptid_t event_ptid)
Upon target_wait entry, target_pre_wait is notified with the ptid
passed to target_wait. Upon exit, target_post_wait is notified with
the event ptid returned by target_wait. Should an exception occur,
event_ptid is null_ptid.
This change benefits to Insight (out-of-tree): there's no real use of the
late hook in gdb itself.
270 lines
10 KiB
C++
270 lines
10 KiB
C++
/* Observers
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Copyright (C) 2016-2022 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef OBSERVABLE_H
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#define OBSERVABLE_H
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#include "gdbsupport/observable.h"
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struct bpstat;
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struct so_list;
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struct objfile;
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struct thread_info;
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struct inferior;
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struct process_stratum_target;
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struct trace_state_variable;
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namespace gdb
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{
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namespace observers
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{
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/* The inferior has stopped for real. The BS argument describes the
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breakpoints were are stopped at, if any. Second argument
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PRINT_FRAME non-zero means display the location where the
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inferior has stopped.
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gdb notifies all normal_stop observers when the inferior execution
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has just stopped, the associated messages and annotations have been
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printed, and the control is about to be returned to the user.
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Note that the normal_stop notification is not emitted when the
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execution stops due to a breakpoint, and this breakpoint has a
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condition that is not met. If the breakpoint has any associated
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commands list, the commands are executed after the notification is
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emitted. */
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extern observable<struct bpstat */* bs */, int /* print_frame */> normal_stop;
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/* The inferior was stopped by a signal. */
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extern observable<enum gdb_signal /* siggnal */> signal_received;
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/* We are done with a step/next/si/ni command. */
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extern observable<> end_stepping_range;
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/* The inferior was terminated by a signal. */
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extern observable<enum gdb_signal /* siggnal */> signal_exited;
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/* The inferior program is finished. */
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extern observable<int /* exitstatus */> exited;
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/* Reverse execution: target ran out of history info. */
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extern observable<> no_history;
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/* A synchronous command finished. */
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extern observable<> sync_execution_done;
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/* An error was caught while executing a command. */
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extern observable<> command_error;
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/* The target's register contents have changed. */
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extern observable<struct target_ops */* target */> target_changed;
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/* The executable being debugged by GDB has changed: The user
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decided to debug a different program, or the program he was
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debugging has been modified since being loaded by the debugger
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(by being recompiled, for instance). */
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extern observable<> executable_changed;
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/* gdb has just connected to an inferior. For 'run', gdb calls this
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observer while the inferior is still stopped at the entry-point
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instruction. For 'attach' and 'core', gdb calls this observer
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immediately after connecting to the inferior, and before any
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information on the inferior has been printed. */
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extern observable<inferior */* inferior */> inferior_created;
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/* The inferior INF has exec'ed a new executable file. */
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extern observable<struct inferior */* inf */> inferior_execd;
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/* The status of process record for inferior inferior in gdb has
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changed. The process record is started if STARTED is true, and
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the process record is stopped if STARTED is false.
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When STARTED is true, METHOD indicates the short name of the
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method used for recording. If the method supports multiple
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formats, FORMAT indicates which one is being used, otherwise it
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is NULL. When STARTED is false, they are both NULL. */
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extern observable<struct inferior */* inferior */, int /* started */,
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const char */* method */, const char */* format */>
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record_changed;
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/* The shared library specified by SOLIB has been loaded. Note that
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when gdb calls this observer, the library's symbols probably
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haven't been loaded yet. */
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extern observable<struct so_list */* solib */> solib_loaded;
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/* The shared library specified by SOLIB has been unloaded. Note
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that when gdb calls this observer, the library's symbols have not
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been unloaded yet, and thus are still available. */
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extern observable<struct so_list */* solib */> solib_unloaded;
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/* The symbol file specified by OBJFILE has been loaded. Called
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with OBJFILE equal to NULL to indicate previously loaded symbol
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table data has now been invalidated. */
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extern observable<struct objfile */* objfile */> new_objfile;
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/* The object file specified by OBJFILE is about to be freed. */
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extern observable<struct objfile */* objfile */> free_objfile;
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/* The thread specified by T has been created. */
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extern observable<struct thread_info */* t */> new_thread;
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/* The thread specified by T has exited. The SILENT argument
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indicates that gdb is removing the thread from its tables without
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wanting to notify the user about it. */
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extern observable<struct thread_info */* t */, int /* silent */> thread_exit;
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/* An explicit stop request was issued to PTID. If PTID equals
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minus_one_ptid, the request applied to all threads. If
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ptid_is_pid(PTID) returns true, the request applied to all
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threads of the process pointed at by PTID. Otherwise, the
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request applied to the single thread pointed at by PTID. */
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extern observable<ptid_t /* ptid */> thread_stop_requested;
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/* The target was resumed. The PTID parameter specifies which
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thread was resume, and may be RESUME_ALL if all threads are
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resumed. */
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extern observable<ptid_t /* ptid */> target_resumed;
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/* The target is about to be proceeded. */
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extern observable<> about_to_proceed;
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/* A new breakpoint B has been created. */
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extern observable<struct breakpoint */* b */> breakpoint_created;
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/* A breakpoint has been destroyed. The argument B is the
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pointer to the destroyed breakpoint. */
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extern observable<struct breakpoint */* b */> breakpoint_deleted;
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/* A breakpoint has been modified in some way. The argument B
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is the modified breakpoint. */
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extern observable<struct breakpoint */* b */> breakpoint_modified;
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/* The trace frame is changed to TFNUM (e.g., by using the 'tfind'
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command). If TFNUM is negative, it means gdb resumes live
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debugging. The number of the tracepoint associated with this
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traceframe is TPNUM. */
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extern observable<int /* tfnum */, int /* tpnum */> traceframe_changed;
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/* The current architecture has changed. The argument NEWARCH is a
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pointer to the new architecture. */
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extern observable<struct gdbarch */* newarch */> architecture_changed;
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/* The thread's ptid has changed. The OLD_PTID parameter specifies
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the old value, and NEW_PTID specifies the new value. */
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extern observable<process_stratum_target * /* target */,
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ptid_t /* old_ptid */, ptid_t /* new_ptid */>
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thread_ptid_changed;
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/* The inferior INF has been added to the list of inferiors. At
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this point, it might not be associated with any process. */
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extern observable<struct inferior */* inf */> inferior_added;
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/* The inferior identified by INF has been attached to a
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process. */
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extern observable<struct inferior */* inf */> inferior_appeared;
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/* Either the inferior associated with INF has been detached from
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the process, or the process has exited. */
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extern observable<struct inferior */* inf */> inferior_exit;
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/* The inferior INF has been removed from the list of inferiors.
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This method is called immediately before freeing INF. */
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extern observable<struct inferior */* inf */> inferior_removed;
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/* Bytes from DATA to DATA + LEN have been written to the inferior
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at ADDR. */
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extern observable<struct inferior */* inferior */, CORE_ADDR /* addr */,
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ssize_t /* len */, const bfd_byte */* data */>
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memory_changed;
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/* Called before a top-level prompt is displayed. CURRENT_PROMPT is
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the current top-level prompt. */
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extern observable<const char */* current_prompt */> before_prompt;
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/* Variable gdb_datadir has been set. The value may not necessarily
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change. */
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extern observable<> gdb_datadir_changed;
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/* The parameter of some 'set' commands in console are changed.
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This method is called after a command 'set param value'. PARAM
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is the parameter of 'set' command, and VALUE is the value of
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changed parameter. */
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extern observable<const char */* param */, const char */* value */>
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command_param_changed;
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/* The new trace state variable TSV is created. */
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extern observable<const struct trace_state_variable */* tsv */> tsv_created;
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/* The trace state variable TSV is deleted. If TSV is NULL, all
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trace state variables are deleted. */
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extern observable<const struct trace_state_variable */* tsv */> tsv_deleted;
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/* The trace state value TSV is modified. */
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extern observable<const struct trace_state_variable */* tsv */> tsv_modified;
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/* An inferior function at ADDRESS is about to be called in thread
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THREAD. */
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extern observable<ptid_t /* thread */, CORE_ADDR /* address */>
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inferior_call_pre;
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/* The inferior function at ADDRESS has just been called. This
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observer is called even if the inferior exits during the call.
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THREAD is the thread in which the function was called, which may
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be different from the current thread. */
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extern observable<ptid_t /* thread */, CORE_ADDR /* address */>
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inferior_call_post;
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/* A register in the inferior has been modified by the gdb user. */
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extern observable<struct frame_info */* frame */, int /* regnum */>
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register_changed;
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/* The user-selected inferior, thread and/or frame has changed. The
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user_select_what flag specifies if the inferior, thread and/or
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frame has changed. */
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extern observable<user_selected_what /* selection */>
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user_selected_context_changed;
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/* This is notified when a styling setting has changed, content may need
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to be updated based on the new settings. */
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extern observable<> styling_changed;
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/* The CLI's notion of the current source has changed. This differs
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from user_selected_context_changed in that it is also set by the
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"list" command. */
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extern observable<> current_source_symtab_and_line_changed;
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/* Called when GDB is about to exit. */
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extern observable<int> gdb_exiting;
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/* When a connection is removed. */
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extern observable<process_stratum_target */* target */> connection_removed;
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/* About to enter target_wait (). */
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extern observable <ptid_t /* ptid */> target_pre_wait;
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/* About to leave target_wait (). */
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extern observable <ptid_t /* event_ptid */> target_post_wait;
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} /* namespace observers */
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} /* namespace gdb */
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#endif /* OBSERVABLE_H */
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