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Convert observers to C++ 

This converts observers from using a special source-generating script
to be plain C++.  This version of the patch takes advantage of C++11
by using std::function and variadic templates; incorporates Pedro's
patches; and renames the header file to "observable.h" (this change
eliminates the need for a clean rebuild).

Note that Pedro's patches used a template lambda in tui-hooks.c, but
this failed to compile on some buildbot instances (presumably due to
differing C++ versions); I replaced this with an ordinary template
function.

Regression tested on the buildbot.

gdb/ChangeLog
2018-03-19  Pedro Alves  <palves@redhat.com>
	    Tom Tromey  <tom@tromey.com>

	* unittests/observable-selftests.c: New file.
	* common/observable.h: New file.
	* observable.h: New file.
	* ada-lang.c, ada-tasks.c, agent.c, aix-thread.c, annotate.c,
	arm-tdep.c, auto-load.c, auxv.c, break-catch-syscall.c,
	breakpoint.c, bsd-uthread.c, cli/cli-interp.c, cli/cli-setshow.c,
	corefile.c, dummy-frame.c, event-loop.c, event-top.c, exec.c,
	extension.c, frame.c, gdbarch.c, guile/scm-breakpoint.c,
	infcall.c, infcmd.c, inferior.c, inflow.c, infrun.c, jit.c,
	linux-tdep.c, linux-thread-db.c, m68klinux-tdep.c,
	mi/mi-cmd-break.c, mi/mi-interp.c, mi/mi-main.c, objfiles.c,
	ppc-linux-nat.c, ppc-linux-tdep.c, printcmd.c, procfs.c,
	python/py-breakpoint.c, python/py-finishbreakpoint.c,
	python/py-inferior.c, python/py-unwind.c, ravenscar-thread.c,
	record-btrace.c, record-full.c, record.c, regcache.c, remote.c,
	riscv-tdep.c, sol-thread.c, solib-aix.c, solib-spu.c, solib.c,
	spu-multiarch.c, spu-tdep.c, stack.c, symfile-mem.c, symfile.c,
	symtab.c, thread.c, top.c, tracepoint.c, tui/tui-hooks.c,
	tui/tui-interp.c, valops.c: Update all users.
	* tui/tui-hooks.c (tui_bp_created_observer)
	(tui_bp_deleted_observer, tui_bp_modified_observer)
	(tui_inferior_exit_observer, tui_before_prompt_observer)
	(tui_normal_stop_observer, tui_register_changed_observer):
	Remove.
	(tui_observers_token): New global.
	(attach_or_detach, tui_attach_detach_observers): New functions.
	(tui_install_hooks, tui_remove_hooks): Use
	tui_attach_detach_observers.
	* record-btrace.c (record_btrace_thread_observer): Remove.
	(record_btrace_thread_observer_token): New global.
	* observer.sh: Remove.
	* observer.c: Rename to observable.c.
	* observable.c (namespace gdb_observers): Define new objects.
	(observer_debug): Move into gdb_observers namespace.
	(struct observer, struct observer_list, xalloc_observer_list_node)
	(xfree_observer_list_node, generic_observer_attach)
	(generic_observer_detach, generic_observer_notify): Remove.
	(_initialize_observer): Update.
	Don't include observer.inc.
	* Makefile.in (generated_files): Remove observer.h, observer.inc.
	(clean mostlyclean): Likewise.
	(observer.h, observer.inc): Remove targets.
	(SUBDIR_UNITTESTS_SRCS): Add observable-selftests.c.
	(COMMON_SFILES): Use observable.c, not observer.c.
	* .gitignore: Remove observer.h.

gdb/doc/ChangeLog
2018-03-19  Tom Tromey  <tom@tromey.com>

	* observer.texi: Remove.

gdb/testsuite/ChangeLog
2018-03-19  Tom Tromey  <tom@tromey.com>

	* gdb.gdb/observer.exp: Remove.
This commit is contained in:
Tom Tromey 2016-10-02 10:50:20 -06:00
parent 194ed4130d
commit 76727919ce
86 changed files with 999 additions and 1234 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
gdb/.gitignore vendored
View File

@ -21,7 +21,6 @@
/jv-exp.c
/m2-exp.c
/objc-exp.c
/observer.h
/observer.inc
/p-exp.c
/rust-exp.c

49
gdb/ChangeLog
View File

@ -1,3 +1,52 @@
2018-03-19 Pedro Alves <palves@redhat.com>
Tom Tromey <tom@tromey.com>
* unittests/observable-selftests.c: New file.
* common/observable.h: New file.
* observable.h: New file.
* ada-lang.c, ada-tasks.c, agent.c, aix-thread.c, annotate.c,
arm-tdep.c, auto-load.c, auxv.c, break-catch-syscall.c,
breakpoint.c, bsd-uthread.c, cli/cli-interp.c, cli/cli-setshow.c,
corefile.c, dummy-frame.c, event-loop.c, event-top.c, exec.c,
extension.c, frame.c, gdbarch.c, guile/scm-breakpoint.c,
infcall.c, infcmd.c, inferior.c, inflow.c, infrun.c, jit.c,
linux-tdep.c, linux-thread-db.c, m68klinux-tdep.c,
mi/mi-cmd-break.c, mi/mi-interp.c, mi/mi-main.c, objfiles.c,
ppc-linux-nat.c, ppc-linux-tdep.c, printcmd.c, procfs.c,
python/py-breakpoint.c, python/py-finishbreakpoint.c,
python/py-inferior.c, python/py-unwind.c, ravenscar-thread.c,
record-btrace.c, record-full.c, record.c, regcache.c, remote.c,
riscv-tdep.c, sol-thread.c, solib-aix.c, solib-spu.c, solib.c,
spu-multiarch.c, spu-tdep.c, stack.c, symfile-mem.c, symfile.c,
symtab.c, thread.c, top.c, tracepoint.c, tui/tui-hooks.c,
tui/tui-interp.c, valops.c: Update all users.
* tui/tui-hooks.c (tui_bp_created_observer)
(tui_bp_deleted_observer, tui_bp_modified_observer)
(tui_inferior_exit_observer, tui_before_prompt_observer)
(tui_normal_stop_observer, tui_register_changed_observer):
Remove.
(tui_observers_token): New global.
(attach_or_detach, tui_attach_detach_observers): New functions.
(tui_install_hooks, tui_remove_hooks): Use
tui_attach_detach_observers.
* record-btrace.c (record_btrace_thread_observer): Remove.
(record_btrace_thread_observer_token): New global.
* observer.sh: Remove.
* observer.c: Rename to observable.c.
* observable.c (namespace gdb_observers): Define new objects.
(observer_debug): Move into gdb_observers namespace.
(struct observer, struct observer_list, xalloc_observer_list_node)
(xfree_observer_list_node, generic_observer_attach)
(generic_observer_detach, generic_observer_notify): Remove.
(_initialize_observer): Update.
Don't include observer.inc.
* Makefile.in (generated_files): Remove observer.h, observer.inc.
(clean mostlyclean): Likewise.
(observer.h, observer.inc): Remove targets.
(SUBDIR_UNITTESTS_SRCS): Add observable-selftests.c.
(COMMON_SFILES): Use observable.c, not observer.c.
* .gitignore: Remove observer.h.
2018-03-18 Tom Tromey <tom@tromey.com>
* solib.c (gdb_bfd_lookup_symbol_from_symtab): Use

13
gdb/Makefile.in
View File

@ -423,6 +423,7 @@ SUBDIR_UNITTESTS_SRCS = \
unittests/memory-map-selftests.c \
unittests/memrange-selftests.c \
unittests/offset-type-selftests.c \
unittests/observable-selftests.c \
unittests/optional-selftests.c \
unittests/ptid-selftests.c \
unittests/rsp-low-selftests.c \
@ -1057,7 +1058,7 @@ COMMON_SFILES = \
namespace.c \
objc-lang.c \
objfiles.c \
observer.c \
observable.c \
opencl-lang.c \
osabi.c \
osdata.c \
@ -1589,8 +1590,6 @@ generated_files = \
config.h \
gcore \
jit-reader.h \
observer.h \
observer.inc \
$(GNULIB_H) \
$(NAT_GENERATED_FILES)
@ -1950,7 +1949,7 @@ tags: TAGS
clean mostlyclean: $(CONFIG_CLEAN)
@$(MAKE) $(FLAGS_TO_PASS) DO=clean "DODIRS=$(CLEANDIRS)" subdir_do
rm -f *.o *.a $(ADD_FILES) *~ init.c-tmp init.l-tmp version.c-tmp
rm -f init.c version.c observer.h observer.inc
rm -f init.c version.c
rm -f gdb$(EXEEXT) core make.log
rm -f gdb[0-9]$(EXEEXT)
rm -f test-cp-name-parser$(EXEEXT)
@ -2137,12 +2136,6 @@ version.c: Makefile version.in $(srcdir)/../bfd/version.h $(srcdir)/common/creat
$(ECHO_GEN) $(SHELL) $(srcdir)/common/create-version.sh $(srcdir) \
$(host_alias) $(target_alias) version.c
observer.h: observer.sh doc/observer.texi
${srcdir}/observer.sh h ${srcdir}/doc/observer.texi observer.h
observer.inc: observer.sh doc/observer.texi
${srcdir}/observer.sh inc ${srcdir}/doc/observer.texi observer.inc
lint: $(LINTFILES)
$(LINT) $(INCLUDE_CFLAGS) $(LINTFLAGS) $(LINTFILES) \
`echo $(DEPFILES) $(CONFIG_OBS) | sed 's/\.o /\.c /g'`

8
gdb/ada-lang.c
View File

@ -48,7 +48,7 @@
#include "annotate.h"
#include "valprint.h"
#include "source.h"
#include "observer.h"
#include "observable.h"
#include "vec.h"
#include "stack.h"
#include "gdb_vecs.h"
@ -14720,9 +14720,9 @@ DWARF attribute."),
NULL, xcalloc, xfree);
/* The ada-lang observers. */
observer_attach_new_objfile (ada_new_objfile_observer);
observer_attach_free_objfile (ada_free_objfile_observer);
observer_attach_inferior_exit (ada_inferior_exit);
gdb::observers::new_objfile.attach (ada_new_objfile_observer);
gdb::observers::free_objfile.attach (ada_free_objfile_observer);
gdb::observers::inferior_exit.attach (ada_inferior_exit);
/* Setup various context-specific data. */
ada_inferior_data

6
gdb/ada-tasks.c
View File

@ -16,7 +16,7 @@
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "observer.h"
#include "observable.h"
#include "gdbcmd.h"
#include "target.h"
#include "ada-lang.h"
@ -1444,8 +1444,8 @@ _initialize_tasks (void)
ada_tasks_inferior_data_handle = register_inferior_data ();
/* Attach various observers. */
observer_attach_normal_stop (ada_tasks_normal_stop_observer);
observer_attach_new_objfile (ada_tasks_new_objfile_observer);
gdb::observers::normal_stop.attach (ada_tasks_normal_stop_observer);
gdb::observers::new_objfile.attach (ada_tasks_new_objfile_observer);
/* Some new commands provided by this module. */
add_info ("tasks", info_tasks_command,

4
gdb/agent.c
View File

@ -51,7 +51,7 @@ set_can_use_agent (const char *args, int from_tty, struct cmd_list_element *c)
can_use_agent = can_use_agent_off;
}
#include "observer.h"
#include "observable.h"
#include "objfiles.h"
static void
@ -66,7 +66,7 @@ agent_new_objfile (struct objfile *objfile)
void
_initialize_agent (void)
{
observer_attach_new_objfile (agent_new_objfile);
gdb::observers::new_objfile.attach (agent_new_objfile);
add_setshow_enum_cmd ("agent", class_run,
can_use_agent_enum,

6
gdb/aix-thread.c
View File

@ -46,7 +46,7 @@
#include "regcache.h"
#include "gdbcmd.h"
#include "ppc-tdep.h"
#include "observer.h"
#include "observable.h"
#include "objfiles.h"
#include <procinfo.h>
@ -1859,11 +1859,11 @@ _initialize_aix_thread (void)
complete_target_initialization (&aix_thread_ops);
/* Notice when object files get loaded and unloaded. */
observer_attach_new_objfile (new_objfile);
gdb::observers::new_objfile.attach (new_objfile);
/* Add ourselves to inferior_created event chain.
This is needed to enable the thread target on "attach". */
observer_attach_inferior_created (aix_thread_inferior_created);
gdb::observers::inferior_created.attach (aix_thread_inferior_created);
add_setshow_boolean_cmd ("aix-thread", class_maintenance, &debug_aix_thread,
_("Set debugging of AIX thread module."),

8
gdb/annotate.c
View File

@ -22,7 +22,7 @@
#include "target.h"
#include "gdbtypes.h"
#include "breakpoint.h"
#include "observer.h"
#include "observable.h"
#include "inferior.h"
#include "infrun.h"
#include "top.h"
@ -592,7 +592,7 @@ breakpoint_changed (struct breakpoint *b)
void
_initialize_annotate (void)
{
observer_attach_breakpoint_created (breakpoint_changed);
observer_attach_breakpoint_deleted (breakpoint_changed);
observer_attach_breakpoint_modified (breakpoint_changed);
gdb::observers::breakpoint_created.attach (breakpoint_changed);
gdb::observers::breakpoint_deleted.attach (breakpoint_changed);
gdb::observers::breakpoint_modified.attach (breakpoint_changed);
}

2
gdb/arm-linux-nat.c
View File

@ -24,7 +24,7 @@
#include "linux-nat.h"
#include "target-descriptions.h"
#include "auxv.h"
#include "observer.h"
#include "observable.h"
#include "gdbthread.h"
#include "arm-tdep.h"

4
gdb/arm-tdep.c
View File

@ -44,7 +44,7 @@
#include "remote.h"
#include "target-descriptions.h"
#include "user-regs.h"
#include "observer.h"
#include "observable.h"
#include "arch/arm.h"
#include "arch/arm-get-next-pcs.h"
@ -9547,7 +9547,7 @@ _initialize_arm_tdep (void)
= register_objfile_data_with_cleanup (NULL, arm_objfile_data_free);
/* Add ourselves to objfile event chain. */
observer_attach_new_objfile (arm_exidx_new_objfile);
gdb::observers::new_objfile.attach (arm_exidx_new_objfile);
arm_exidx_data_key
= register_objfile_data_with_cleanup (NULL, arm_exidx_data_free);

6
gdb/auto-load.c
View File

@ -25,7 +25,7 @@
#include "ui-out.h"
#include "filenames.h"
#include "command.h"
#include "observer.h"
#include "observable.h"
#include "objfiles.h"
#include "cli/cli-script.h"
#include "gdbcmd.h"
@ -1543,7 +1543,7 @@ _initialize_auto_load (void)
= register_program_space_data_with_cleanup (NULL,
auto_load_pspace_data_cleanup);
observer_attach_new_objfile (auto_load_new_objfile);
gdb::observers::new_objfile.attach (auto_load_new_objfile);
add_setshow_boolean_cmd ("gdb-scripts", class_support,
&auto_load_gdb_scripts, _("\
@ -1653,7 +1653,7 @@ This options has security implications for untrusted inferiors."),
show_auto_load_safe_path,
auto_load_set_cmdlist_get (),
auto_load_show_cmdlist_get ());
observer_attach_gdb_datadir_changed (auto_load_gdb_datadir_changed);
gdb::observers::gdb_datadir_changed.attach (auto_load_gdb_datadir_changed);
cmd = add_cmd ("add-auto-load-safe-path", class_support,
add_auto_load_safe_path,

8
gdb/auxv.c
View File

@ -24,7 +24,7 @@
#include "inferior.h"
#include "valprint.h"
#include "gdbcore.h"
#include "observer.h"
#include "observable.h"
#include "filestuff.h"
#include "objfiles.h"
@ -579,7 +579,7 @@ This is information provided by the operating system at program startup."));
= register_inferior_data_with_cleanup (NULL, auxv_inferior_data_cleanup);
/* Observers used to invalidate the auxv cache when needed. */
observer_attach_inferior_exit (invalidate_auxv_cache_inf);
observer_attach_inferior_appeared (invalidate_auxv_cache_inf);
observer_attach_executable_changed (invalidate_auxv_cache);
gdb::observers::inferior_exit.attach (invalidate_auxv_cache_inf);
gdb::observers::inferior_appeared.attach (invalidate_auxv_cache_inf);
gdb::observers::executable_changed.attach (invalidate_auxv_cache);
}

4
gdb/break-catch-syscall.c
View File

@ -27,7 +27,7 @@
#include "mi/mi-common.h"
#include "valprint.h"
#include "arch-utils.h"
#include "observer.h"
#include "observable.h"
#include "xml-syscall.h"
/* An instance of this type is used to represent a syscall catchpoint.
@ -632,7 +632,7 @@ _initialize_break_catch_syscall (void)
{
initialize_syscall_catchpoint_ops ();
observer_attach_inferior_exit (clear_syscall_counts);
gdb::observers::inferior_exit.attach (clear_syscall_counts);
catch_syscall_inferior_data
= register_inferior_data_with_cleanup (NULL,
catch_syscall_inferior_data_cleanup);

52
gdb/breakpoint.c
View File

@ -49,7 +49,7 @@
#include "block.h"
#include "solib.h"
#include "solist.h"
#include "observer.h"
#include "observable.h"
#include "memattr.h"
#include "ada-lang.h"
#include "top.h"
@ -903,7 +903,7 @@ set_breakpoint_condition (struct breakpoint *b, const char *exp,
}
mark_breakpoint_modified (b);
observer_notify_breakpoint_modified (b);
gdb::observers::breakpoint_modified.notify (b);
}
/* Completion for the "condition" command. */
@ -1172,7 +1172,7 @@ breakpoint_set_commands (struct breakpoint *b,
validate_commands_for_breakpoint (b, commands.get ());
b->commands = std::move (commands);
observer_notify_breakpoint_modified (b);
gdb::observers::breakpoint_modified.notify (b);
}
/* Set the internal `silent' flag on the breakpoint. Note that this
@ -1186,7 +1186,7 @@ breakpoint_set_silent (struct breakpoint *b, int silent)
b->silent = silent;
if (old_silent != silent)
observer_notify_breakpoint_modified (b);
gdb::observers::breakpoint_modified.notify (b);
}
/* Set the thread for this breakpoint. If THREAD is -1, make the
@ -1199,7 +1199,7 @@ breakpoint_set_thread (struct breakpoint *b, int thread)
b->thread = thread;
if (old_thread != thread)
observer_notify_breakpoint_modified (b);
gdb::observers::breakpoint_modified.notify (b);
}
/* Set the task for this breakpoint. If TASK is 0, make the
@ -1212,7 +1212,7 @@ breakpoint_set_task (struct breakpoint *b, int task)
b->task = task;
if (old_task != task)
observer_notify_breakpoint_modified (b);
gdb::observers::breakpoint_modified.notify (b);
}
void
@ -1269,7 +1269,7 @@ commands_command_1 (const char *arg, int from_tty,
{
validate_commands_for_breakpoint (b, cmd.get ());
b->commands = cmd;
observer_notify_breakpoint_modified (b);
gdb::observers::breakpoint_modified.notify (b);
}
});
}
@ -2655,7 +2655,7 @@ insert_bp_location (struct bp_location *bl,
{
/* See also: disable_breakpoints_in_shlibs. */
bl->shlib_disabled = 1;
observer_notify_breakpoint_modified (bl->owner);
gdb::observers::breakpoint_modified.notify (bl->owner);
if (!*disabled_breaks)
{
fprintf_unfiltered (tmp_error_stream,
@ -5321,7 +5321,7 @@ bpstat_check_breakpoint_conditions (bpstat bs, ptid_t ptid)
bs->stop = 0;
/* Increase the hit count even though we don't stop. */
++(b->hit_count);
observer_notify_breakpoint_modified (b);
gdb::observers::breakpoint_modified.notify (b);
}
}
@ -5476,7 +5476,7 @@ bpstat_stop_status (const address_space *aspace,
if (bs->stop)
{
++(b->hit_count);
observer_notify_breakpoint_modified (b);
gdb::observers::breakpoint_modified.notify (b);
/* We will stop here. */
if (b->disposition == disp_disable)
@ -7639,7 +7639,7 @@ disable_breakpoints_in_unloaded_shlib (struct so_list *solib)
loc->inserted = 0;
/* This may cause duplicate notifications for the same breakpoint. */
observer_notify_breakpoint_modified (b);
gdb::observers::breakpoint_modified.notify (b);
if (!disabled_shlib_breaks)
{
@ -7722,7 +7722,7 @@ disable_breakpoints_in_freed_objfile (struct objfile *objfile)
}
if (bp_modified)
observer_notify_breakpoint_modified (b);
gdb::observers::breakpoint_modified.notify (b);
}
}
@ -8250,7 +8250,7 @@ install_breakpoint (int internal, std::unique_ptr<breakpoint> &&arg, int update_
set_tracepoint_count (breakpoint_count);
if (!internal)
mention (b);
observer_notify_breakpoint_created (b);
gdb::observers::breakpoint_created.notify (b);
if (update_gll)
update_global_location_list (UGLL_MAY_INSERT);
@ -9989,7 +9989,7 @@ break_range_command (const char *arg, int from_tty)
b->loc->length = length;
mention (b);
observer_notify_breakpoint_created (b);
gdb::observers::breakpoint_created.notify (b);
update_global_location_list (UGLL_MAY_INSERT);
}
@ -11744,7 +11744,7 @@ download_tracepoint_locations (void)
t = (struct tracepoint *) b;
t->number_on_target = b->number;
if (bp_location_downloaded)
observer_notify_breakpoint_modified (b);
gdb::observers::breakpoint_modified.notify (b);
}
}
@ -13257,7 +13257,7 @@ delete_breakpoint (struct breakpoint *bpt)
a problem in that process, we'll be asked to delete the half-created
watchpoint. In that case, don't announce the deletion. */
if (bpt->number)
observer_notify_breakpoint_deleted (bpt);
gdb::observers::breakpoint_deleted.notify (bpt);
if (breakpoint_chain == bpt)
breakpoint_chain = bpt->next;
@ -13732,7 +13732,7 @@ update_breakpoint_locations (struct breakpoint *b,
}
if (!locations_are_equal (existing_locations, b->loc))
observer_notify_breakpoint_modified (b);
gdb::observers::breakpoint_modified.notify (b);
}
/* Find the SaL locations corresponding to the given LOCATION.
@ -14029,7 +14029,7 @@ set_ignore_count (int bptnum, int count, int from_tty)
"crossings of breakpoint %d."),
count, bptnum);
}
observer_notify_breakpoint_modified (b);
gdb::observers::breakpoint_modified.notify (b);
return;
}
@ -14332,7 +14332,7 @@ disable_breakpoint (struct breakpoint *bpt)
update_global_location_list (UGLL_DONT_INSERT);
observer_notify_breakpoint_modified (bpt);
gdb::observers::breakpoint_modified.notify (bpt);
}
/* Enable or disable the breakpoint(s) or breakpoint location(s)
@ -14458,7 +14458,7 @@ enable_breakpoint_disp (struct breakpoint *bpt, enum bpdisp disposition,
bpt->enable_count = count;
update_global_location_list (UGLL_MAY_INSERT);
observer_notify_breakpoint_modified (bpt);
gdb::observers::breakpoint_modified.notify (bpt);
}
@ -14938,7 +14938,7 @@ static void
trace_pass_set_count (struct tracepoint *tp, int count, int from_tty)
{
tp->pass_count = count;
observer_notify_breakpoint_modified (tp);
gdb::observers::breakpoint_modified.notify (tp);
if (from_tty)
printf_filtered (_("Setting tracepoint %d's passcount to %d\n"),
tp->number, count);
@ -15578,9 +15578,9 @@ _initialize_breakpoint (void)
initialize_breakpoint_ops ();
observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib);
observer_attach_free_objfile (disable_breakpoints_in_freed_objfile);
observer_attach_memory_changed (invalidate_bp_value_on_memory_change);
gdb::observers::solib_unloaded.attach (disable_breakpoints_in_unloaded_shlib);
gdb::observers::free_objfile.attach (disable_breakpoints_in_freed_objfile);
gdb::observers::memory_changed.attach (invalidate_bp_value_on_memory_change);
breakpoint_objfile_key
= register_objfile_data_with_cleanup (NULL, free_breakpoint_objfile_data);
@ -16131,6 +16131,6 @@ agent-printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
automatic_hardware_breakpoints = 1;
observer_attach_about_to_proceed (breakpoint_about_to_proceed);
observer_attach_thread_exit (remove_threaded_breakpoints);
gdb::observers::about_to_proceed.attach (breakpoint_about_to_proceed);
gdb::observers::thread_exit.attach (remove_threaded_breakpoints);
}

8
gdb/bsd-uthread.c
View File

@ -22,7 +22,7 @@
#include "gdbthread.h"
#include "inferior.h"
#include "objfiles.h"
#include "observer.h"
#include "observable.h"
#include "regcache.h"
#include "solib.h"
#include "solist.h"
@ -554,7 +554,7 @@ _initialize_bsd_uthread (void)
bsd_uthread_data = gdbarch_data_register_pre_init (bsd_uthread_init);
observer_attach_inferior_created (bsd_uthread_inferior_created);
observer_attach_solib_loaded (bsd_uthread_solib_loaded);
observer_attach_solib_unloaded (bsd_uthread_solib_unloaded);
gdb::observers::inferior_created.attach (bsd_uthread_inferior_created);
gdb::observers::solib_loaded.attach (bsd_uthread_solib_loaded);
gdb::observers::solib_unloaded.attach (bsd_uthread_solib_unloaded);
}

20
gdb/cli/cli-interp.c
View File

@ -26,7 +26,7 @@
#include "top.h" /* for "execute_command" */
#include "event-top.h"
#include "infrun.h"
#include "observer.h"
#include "observable.h"
#include "gdbthread.h"
#include "thread-fsm.h"
@ -461,14 +461,14 @@ _initialize_cli_interp (void)
interp_factory_register (INTERP_CONSOLE, cli_interp_factory);
/* If changing this, remember to update tui-interp.c as well. */
observer_attach_normal_stop (cli_on_normal_stop);
observer_attach_end_stepping_range (cli_on_end_stepping_range);
observer_attach_signal_received (cli_on_signal_received);
observer_attach_signal_exited (cli_on_signal_exited);
observer_attach_exited (cli_on_exited);
observer_attach_no_history (cli_on_no_history);
observer_attach_sync_execution_done (cli_on_sync_execution_done);
observer_attach_command_error (cli_on_command_error);
observer_attach_user_selected_context_changed
gdb::observers::normal_stop.attach (cli_on_normal_stop);
gdb::observers::end_stepping_range.attach (cli_on_end_stepping_range);
gdb::observers::signal_received.attach (cli_on_signal_received);
gdb::observers::signal_exited.attach (cli_on_signal_exited);
gdb::observers::exited.attach (cli_on_exited);
gdb::observers::no_history.attach (cli_on_no_history);
gdb::observers::sync_execution_done.attach (cli_on_sync_execution_done);
gdb::observers::command_error.attach (cli_on_command_error);
gdb::observers::user_selected_context_changed.attach
(cli_on_user_selected_context_changed);
}

12
gdb/cli/cli-setshow.c
View File

@ -20,7 +20,7 @@
#include "value.h"
#include <ctype.h>
#include "arch-utils.h"
#include "observer.h"
#include "observable.h"
#include "ui-out.h"
@ -511,20 +511,20 @@ do_set_command (const char *arg, int from_tty, struct cmd_list_element *c)
case var_filename:
case var_optional_filename:
case var_enum:
observer_notify_command_param_changed (name, *(char **) c->var);
gdb::observers::command_param_changed.notify (name, *(char **) c->var);
break;
case var_boolean:
{
const char *opt = *(int *) c->var ? "on" : "off";
observer_notify_command_param_changed (name, opt);
gdb::observers::command_param_changed.notify (name, opt);
}
break;
case var_auto_boolean:
{
const char *s = auto_boolean_enums[*(enum auto_boolean *) c->var];
observer_notify_command_param_changed (name, s);
gdb::observers::command_param_changed.notify (name, s);
}
break;
case var_uinteger:
@ -533,7 +533,7 @@ do_set_command (const char *arg, int from_tty, struct cmd_list_element *c)
char s[64];
xsnprintf (s, sizeof s, "%u", *(unsigned int *) c->var);
observer_notify_command_param_changed (name, s);
gdb::observers::command_param_changed.notify (name, s);
}
break;
case var_integer:
@ -543,7 +543,7 @@ do_set_command (const char *arg, int from_tty, struct cmd_list_element *c)
char s[64];
xsnprintf (s, sizeof s, "%d", *(int *) c->var);
observer_notify_command_param_changed (name, s);
gdb::observers::command_param_changed.notify (name, s);
}
break;
}

119
gdb/common/observable.h Normal file
View File

@ -0,0 +1,119 @@
/* Observers
Copyright (C) 2016-2018 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#if !defined (GDB_COMMON_OBSERVABLE_H)
#define GDB_COMMON_OBSERVABLE_H
#include <algorithm>
#include <functional>
#include <vector>
namespace gdb
{
namespace observers
{
extern unsigned int observer_debug;
/* An observer is an entity which is interested in being notified
when GDB reaches certain states, or certain events occur in GDB.
The entity being observed is called the observable. To receive
notifications, the observer attaches a callback to the observable.
One observable can have several observers.
The observer implementation is also currently not reentrant. In
particular, it is therefore not possible to call the attach or
detach routines during a notification. */
/* The type of a key that can be passed to attach, which can be passed
to detach to remove associated observers. Tokens have address
identity, and are thus usually const globals. */
struct token
{
token () = default;
DISABLE_COPY_AND_ASSIGN (token);
};
template<typename... T>
class observable
{
public:
typedef std::function<void (T...)> func_type;
explicit observable (const char *name)
: m_name (name)
{
}
DISABLE_COPY_AND_ASSIGN (observable);
/* Attach F as an observer to this observable. F cannot be
detached. */
void attach (const func_type &f)
{
m_observers.emplace_back (nullptr, f);
}
/* Attach F as an observer to this observable. T is a reference to
a token that can be used to later remove F. */
void attach (const func_type &f, const token &t)
{
m_observers.emplace_back (&t, f);
}
/* Remove observers associated with T from this observable. T is
the token that was previously passed to any number of "attach"
calls. */
void detach (const token &t)
{
auto iter = std::remove_if (m_observers.begin (),
m_observers.end (),
[&] (const std::pair<const token *,
func_type> &e)
{
return e.first == &t;
});
m_observers.erase (iter, m_observers.end ());
}
/* Notify all observers that are attached to this observable. */
void notify (T... args) const
{
if (observer_debug)
fprintf_unfiltered (gdb_stdlog, "observable %s notify() called\n",
m_name);
for (auto &&e : m_observers)
e.second (args...);
}
private:
std::vector<std::pair<const token *, func_type>> m_observers;
const char *m_name;
};
} /* namespace observers */
} /* namespace gdb */
#endif /* GDB_COMMON_OBSERVABLE_H */

4
gdb/corefile.c
View File

@ -30,7 +30,7 @@
#include "dis-asm.h"
#include <sys/stat.h>
#include "completer.h"
#include "observer.h"
#include "observable.h"
#include "cli/cli-utils.h"
/* You can have any number of hooks for `exec_file_command' command to
@ -408,7 +408,7 @@ write_memory_with_notification (CORE_ADDR memaddr, const bfd_byte *myaddr,
ssize_t len)
{
write_memory (memaddr, myaddr, len);
observer_notify_memory_changed (current_inferior (), memaddr, len, myaddr);
gdb::observers::memory_changed.notify (current_inferior (), memaddr, len, myaddr);
}
/* Store VALUE at ADDR in the inferior as a LEN-byte unsigned

2
gdb/defs.h
View File

@ -658,7 +658,7 @@ enum block_enum
FIRST_LOCAL_BLOCK = 2
};
/* User selection used in observer.h and multiple print functions. */
/* User selection used in observable.h and multiple print functions. */
enum user_selected_what_flag
{

4
gdb/doc/ChangeLog
View File

@ -1,3 +1,7 @@
2018-03-19 Tom Tromey <tom@tromey.com>
* observer.texi: Remove.
2018-03-04 John Baldwin <jhb@FreeBSD.org>
* gdb.texinfo (Debugging Output): Document "set/show debug

313
gdb/doc/observer.texi
View File

@ -1,313 +0,0 @@
@c -*-texinfo-*-
@c This file is part of the GDB manual.
@c
@c Copyright (C) 2003-2018 Free Software Foundation, Inc.
@c
@c See the file gdbint.texinfo for copying conditions.
@c
@c Also, the @deftypefun lines from this file are processed into a
@c header file during the GDB build process. Permission is granted
@c to redistribute and/or modify those lines under the terms of the
@c GNU General Public License as published by the Free Software
@c Foundation; either version 3 of the License, or (at your option)
@c any later version.
@node GDB Observers
@appendix @value{GDBN} Currently available observers
@section Implementation rationale
@cindex observers implementation rationale
An @dfn{observer} is an entity which is interested in being notified
when GDB reaches certain states, or certain events occur in GDB.
The entity being observed is called the @dfn{subject}. To receive
notifications, the observer attaches a callback to the subject.
One subject can have several observers.
@file{observer.c} implements an internal generic low-level event
notification mechanism. This generic event notification mechanism is
then re-used to implement the exported high-level notification
management routines for all possible notifications.
The current implementation of the generic observer provides support
for contextual data. This contextual data is given to the subject
when attaching the callback. In return, the subject will provide
this contextual data back to the observer as a parameter of the
callback.
Note that the current support for the contextual data is only partial,
as it lacks a mechanism that would deallocate this data when the
callback is detached. This is not a problem so far, as this contextual
data is only used internally to hold a function pointer. Later on, if
a certain observer needs to provide support for user-level contextual
data, then the generic notification mechanism will need to be
enhanced to allow the observer to provide a routine to deallocate the
data when attaching the callback.
The observer implementation is also currently not reentrant.
In particular, it is therefore not possible to call the attach
or detach routines during a notification.
@section Debugging
Observer notifications can be traced using the command @samp{set debug
observer 1} (@pxref{Debugging Output, , Optional messages about
internal happenings, gdb, Debugging with @var{GDBN}}).
@section @code{normal_stop} Notifications
@cindex @code{normal_stop} observer
@cindex notification about inferior execution stop
@value{GDBN} notifies all @code{normal_stop} observers when the
inferior execution has just stopped, the associated messages and
annotations have been printed, and the control is about to be returned
to the user.
Note that the @code{normal_stop} notification is not emitted when
the execution stops due to a breakpoint, and this breakpoint has
a condition that is not met. If the breakpoint has any associated
commands list, the commands are executed after the notification
is emitted.
The following interfaces are available to manage observers:
@deftypefun extern struct observer *observer_attach_@var{event} (observer_@var{event}_ftype *@var{f})
Using the function @var{f}, create an observer that is notified when
ever @var{event} occurs, return the observer.
@end deftypefun
@deftypefun extern void observer_detach_@var{event} (struct observer *@var{observer});
Remove @var{observer} from the list of observers to be notified when
@var{event} occurs.
@end deftypefun
@deftypefun extern void observer_notify_@var{event} (void);
Send a notification to all @var{event} observers.
@end deftypefun
The following observable events are defined:
@deftypefun void normal_stop (struct bpstats *@var{bs}, int @var{print_frame})
The inferior has stopped for real. The @var{bs} argument describes
the breakpoints were are stopped at, if any. Second argument
@var{print_frame} non-zero means display the location where the
inferior has stopped.
@end deftypefun
@deftypefun void signal_received (enum gdb_signal @var{siggnal})
The inferior was stopped by a signal.
@end deftypefun
@deftypefun void end_stepping_range (void)
We are done with a step/next/si/ni command.
@end deftypefun
@deftypefun void signal_exited (enum gdb_signal @var{siggnal})
The inferior was terminated by a signal.
@end deftypefun
@deftypefun void exited (int @var{exitstatus})
The inferior program is finished.
@end deftypefun
@deftypefun void no_history (void)
Reverse execution: target ran out of history info.
@end deftypefun
@deftypefun void sync_execution_done (void)
A synchronous command finished.
@end deftypefun
@deftypefun void command_error (void)
An error was caught while executing a command.
@end deftypefun
@deftypefun void target_changed (struct target_ops *@var{target})
The target's register contents have changed.
@end deftypefun
@deftypefun void executable_changed (void)
The executable being debugged by GDB has changed: The user decided
to debug a different program, or the program he was debugging has
been modified since being loaded by the debugger (by being recompiled,
for instance).
@end deftypefun
@deftypefun void inferior_created (struct target_ops *@var{objfile}, int @var{from_tty})
@value{GDBN} has just connected to an inferior. For @samp{run},
@value{GDBN} calls this observer while the inferior is still stopped
at the entry-point instruction. For @samp{attach} and @samp{core},
@value{GDBN} calls this observer immediately after connecting to the
inferior, and before any information on the inferior has been printed.
@end deftypefun
@deftypefun void record_changed (struct inferior *@var{inferior}, int @var{started}, const char *@var{method}, const char *@var{format})
The status of process record for inferior @var{inferior} in
@value{GDBN} has changed. The process record is started if
@var{started} is true, and the process record is stopped if
@var{started} is false.
When @var{started} is true, @var{method} indicates the short name of the method
used for recording. If the method supports multiple formats, @var{format}
indicates which one is being used, otherwise it is NULL. When @var{started} is
false, they are both NULL.
@end deftypefun
@deftypefun void solib_loaded (struct so_list *@var{solib})
The shared library specified by @var{solib} has been loaded. Note that
when @value{GDBN} calls this observer, the library's symbols probably
haven't been loaded yet.
@end deftypefun
@deftypefun void solib_unloaded (struct so_list *@var{solib})
The shared library specified by @var{solib} has been unloaded.
Note that when @value{GDBN} calls this observer, the library's
symbols have not been unloaded yet, and thus are still available.
@end deftypefun
@deftypefun void new_objfile (struct objfile *@var{objfile})
The symbol file specified by @var{objfile} has been loaded.
Called with @var{objfile} equal to @code{NULL} to indicate
previously loaded symbol table data has now been invalidated.
@end deftypefun
@deftypefun void free_objfile (struct objfile *@var{objfile})
The object file specified by @var{objfile} is about to be freed.
@end deftypefun
@deftypefun void new_thread (struct thread_info *@var{t})
The thread specified by @var{t} has been created.
@end deftypefun
@deftypefun void thread_exit (struct thread_info *@var{t}, int @var{silent})
The thread specified by @var{t} has exited. The @var{silent} argument
indicates that @value{GDBN} is removing the thread from its tables
without wanting to notify the user about it.
@end deftypefun
@deftypefun void thread_stop_requested (ptid_t @var{ptid})
An explicit stop request was issued to @var{ptid}. If @var{ptid}
equals @var{minus_one_ptid}, the request applied to all threads. If
@code{ptid_is_pid(ptid)} returns true, the request applied to all
threads of the process pointed at by @var{ptid}. Otherwise, the
request applied to the single thread pointed at by @var{ptid}.
@end deftypefun
@deftypefun void target_resumed (ptid_t @var{ptid})
The target was resumed. The @var{ptid} parameter specifies which
thread was resume, and may be RESUME_ALL if all threads are resumed.
@end deftypefun
@deftypefun void about_to_proceed (void)
The target is about to be proceeded.
@end deftypefun
@deftypefun void breakpoint_created (struct breakpoint *@var{b})
A new breakpoint @var{b} has been created.
@end deftypefun
@deftypefun void breakpoint_deleted (struct breakpoint *@var{b})
A breakpoint has been destroyed. The argument @var{b} is the
pointer to the destroyed breakpoint.
@end deftypefun
@deftypefun void breakpoint_modified (struct breakpoint *@var{b})
A breakpoint has been modified in some way. The argument @var{b}
is the modified breakpoint.
@end deftypefun
@deftypefun void traceframe_changed (int @var{tfnum}, int @var{tpnum})
The trace frame is changed to @var{tfnum} (e.g., by using the
@code{tfind} command). If @var{tfnum} is negative, it means
@value{GDBN} resumes live debugging. The number of the tracepoint
associated with this traceframe is @var{tpnum}.
@end deftypefun
@deftypefun void architecture_changed (struct gdbarch *@var{newarch})
The current architecture has changed. The argument @var{newarch} is
a pointer to the new architecture.
@end deftypefun
@deftypefun void thread_ptid_changed (ptid_t @var{old_ptid}, ptid_t @var{new_ptid})
The thread's ptid has changed. The @var{old_ptid} parameter specifies
the old value, and @var{new_ptid} specifies the new value.
@end deftypefun
@deftypefun void inferior_added (struct inferior *@var{inf})
The inferior @var{inf} has been added to the list of inferiors. At
this point, it might not be associated with any process.
@end deftypefun
@deftypefun void inferior_appeared (struct inferior *@var{inf})
The inferior identified by @var{inf} has been attached to a process.
@end deftypefun
@deftypefun void inferior_exit (struct inferior *@var{inf})
Either the inferior associated with @var{inf} has been detached from the
process, or the process has exited.
@end deftypefun
@deftypefun void inferior_removed (struct inferior *@var{inf})
The inferior @var{inf} has been removed from the list of inferiors.
This method is called immediately before freeing @var{inf}.
@end deftypefun
@deftypefun void memory_changed (struct inferior *@var{inferior}, CORE_ADDR @var{addr}, ssize_t @var{len}, const bfd_byte *@var{data})
Bytes from @var{data} to @var{data} + @var{len} have been written
to the @var{inferior} at @var{addr}.
@end deftypefun
@deftypefun void before_prompt (const char *@var{current_prompt})
Called before a top-level prompt is displayed. @var{current_prompt} is
the current top-level prompt.
@end deftypefun
@deftypefun void gdb_datadir_changed (void)
Variable gdb_datadir has been set. The value may not necessarily change.
@end deftypefun
@deftypefun void command_param_changed (const char *@var{param}, const char *@var{value})
The parameter of some @code{set} commands in console are changed. This
method is called after a command @code{set @var{param} @var{value}}.
@var{param} is the parameter of @code{set} command, and @var{value}
is the value of changed parameter.
@end deftypefun
@deftypefun void tsv_created (const struct trace_state_variable *@var{tsv})
The new trace state variable @var{tsv} is created.
@end deftypefun
@deftypefun void tsv_deleted (const struct trace_state_variable *@var{tsv})
The trace state variable @var{tsv} is deleted. If @var{tsv} is
@code{NULL}, all trace state variables are deleted.
@end deftypefun
@deftypefun void tsv_modified (const struct trace_state_variable *@var{tsv})
The trace state value @var{tsv} is modified.
@end deftypefun
@deftypefun void inferior_call_pre (ptid_t @var{thread}, CORE_ADDR @var{address})
An inferior function at @var{address} is about to be called in thread
@var{thread}.
@end deftypefun
@deftypefun void inferior_call_post (ptid_t @var{thread}, CORE_ADDR @var{address})
The inferior function at @var{address} has just been called. This observer
is called even if the inferior exits during the call. @var{thread} is the
thread in which the function was called, which may be different from the
current thread.
@end deftypefun
@deftypefun void register_changed (struct frame_info *@var{frame}, int @var{regnum})
A register in the inferior has been modified by the @value{GDBN} user.
@end deftypefun
@deftypefun void test_notification (int @var{somearg})
This observer is used for internal testing. Do not use.
See testsuite/gdb.gdb/observer.exp.
@end deftypefun
@deftypefun void user_selected_context_changed (user_selected_what @var{selection})
The user-selected inferior, thread and/or frame has changed. The user_select_what
flag specifies if the inferior, thread and/or frame has changed.
@end deftypefun

4
gdb/dummy-frame.c
View File

@ -26,7 +26,7 @@
#include "frame-unwind.h"
#include "command.h"
#include "gdbcmd.h"
#include "observer.h"
#include "observable.h"
#include "gdbthread.h"
#include "infcall.h"
@ -424,5 +424,5 @@ _initialize_dummy_frame (void)
_("Print the contents of the internal dummy-frame stack."),
&maintenanceprintlist);
observer_attach_inferior_created (cleanup_dummy_frames);
gdb::observers::inferior_created.attach (cleanup_dummy_frames);
}

4
gdb/event-loop.c
View File

@ -34,7 +34,7 @@
#include <sys/types.h>
#include "gdb_sys_time.h"
#include "gdb_select.h"
#include "observer.h"
#include "observable.h"
#include "top.h"
/* Tell create_file_handler what events we are interested in.
@ -382,7 +382,7 @@ start_event_loop (void)
get around to resetting the prompt, which leaves readline
in a messed-up state. Reset it here. */
current_ui->prompt_state = PROMPT_NEEDED;
observer_notify_command_error ();
gdb::observers::command_error.notify ();
/* This call looks bizarre, but it is required. If the user
entered a command that caused an error,
after_char_processing_hook won't be called from

4
gdb/event-top.c
View File

@ -32,7 +32,7 @@
#include "cli/cli-script.h" /* for reset_command_nest_depth */
#include "main.h"
#include "gdbthread.h"
#include "observer.h"
#include "observable.h"
#include "continuations.h"
#include "gdbcmd.h" /* for dont_repeat() */
#include "annotate.h"
@ -428,7 +428,7 @@ top_level_prompt (void)
/* Give observers a chance of changing the prompt. E.g., the python
`gdb.prompt_hook' is installed as an observer. */
observer_notify_before_prompt (get_prompt ());
gdb::observers::before_prompt.notify (get_prompt ());
prompt = get_prompt ();

4
gdb/exec.c
View File

@ -29,7 +29,7 @@
#include "completer.h"
#include "value.h"
#include "exec.h"
#include "observer.h"
#include "observable.h"
#include "arch-utils.h"
#include "gdbthread.h"
#include "progspace.h"
@ -378,7 +378,7 @@ exec_file_attach (const char *filename, int from_tty)
}
bfd_cache_close_all ();
observer_notify_executable_changed ();
gdb::observers::executable_changed.notify ();
}
/* Process the first arg in ARGS as the new exec file.

4
gdb/extension.c
View File

@ -28,7 +28,7 @@
#include "event-top.h"
#include "extension.h"
#include "extension-priv.h"
#include "observer.h"
#include "observable.h"
#include "cli/cli-script.h"
#include "python/python.h"
#include "guile/guile.h"
@ -945,5 +945,5 @@ ext_lang_before_prompt (const char *current_gdb_prompt)
void
_initialize_extension (void)
{
observer_attach_before_prompt (ext_lang_before_prompt);
gdb::observers::before_prompt.attach (ext_lang_before_prompt);
}

4
gdb/frame.c
View File

@ -34,7 +34,7 @@
#include "frame-base.h"
#include "command.h"
#include "gdbcmd.h"
#include "observer.h"
#include "observable.h"
#include "objfiles.h"
#include "gdbthread.h"
#include "block.h"
@ -2923,7 +2923,7 @@ _initialize_frame (void)
frame_stash_create ();
observer_attach_target_changed (frame_observer_target_changed);
gdb::observers::target_changed.attach (frame_observer_target_changed);
add_prefix_cmd ("backtrace", class_maintenance, set_backtrace_cmd, _("\
Set backtrace specific variables.\n\

4
gdb/gdbarch.c
View File

@ -44,7 +44,7 @@
#include "reggroups.h"
#include "osabi.h"
#include "gdb_obstack.h"
#include "observer.h"
#include "observable.h"
#include "regcache.h"
#include "objfiles.h"
#include "auxv.h"
@ -5457,7 +5457,7 @@ set_target_gdbarch (struct gdbarch *new_gdbarch)
gdb_assert (new_gdbarch != NULL);
gdb_assert (new_gdbarch->initialized_p);
current_inferior ()->gdbarch = new_gdbarch;
observer_notify_architecture_changed (new_gdbarch);
gdb::observers::architecture_changed.notify (new_gdbarch);
registers_changed ();
}

6
gdb/guile/scm-breakpoint.c
View File

@ -25,7 +25,7 @@
#include "breakpoint.h"
#include "gdbcmd.h"
#include "gdbthread.h"
#include "observer.h"
#include "observable.h"
#include "cli/cli-script.h"
#include "ada-lang.h"
#include "arch-utils.h"
@ -1327,8 +1327,8 @@ gdbscm_initialize_breakpoints (void)
scm_set_smob_free (breakpoint_smob_tag, bpscm_free_breakpoint_smob);
scm_set_smob_print (breakpoint_smob_tag, bpscm_print_breakpoint_smob);
observer_attach_breakpoint_created (bpscm_breakpoint_created);
observer_attach_breakpoint_deleted (bpscm_breakpoint_deleted);
gdb::observers::breakpoint_created.attach (bpscm_breakpoint_created);
gdb::observers::breakpoint_deleted.attach (bpscm_breakpoint_deleted);
gdbscm_define_integer_constants (breakpoint_integer_constants, 1);
gdbscm_define_functions (breakpoint_functions, 1);

2
gdb/inf-loop.c
View File

@ -29,7 +29,7 @@
#include "continuations.h"
#include "interps.h"
#include "top.h"
#include "observer.h"
#include "observable.h"
/* General function to handle events in the inferior. */

6
gdb/infcall.c
View File

@ -35,7 +35,7 @@
#include "ada-lang.h"
#include "gdbthread.h"
#include "event-top.h"
#include "observer.h"
#include "observable.h"
#include "top.h"
#include "interps.h"
#include "thread-fsm.h"
@ -903,7 +903,7 @@ call_function_by_hand_dummy (struct value *function,
target_values_type = values_type;
}
observer_notify_inferior_call_pre (inferior_ptid, funaddr);
gdb::observers::inferior_call_pre.notify (inferior_ptid, funaddr);
/* Determine the location of the breakpoint (and possibly other
stuff) that the called function will return to. The SPARC, for a
@ -1176,7 +1176,7 @@ call_function_by_hand_dummy (struct value *function,
e = run_inferior_call (sm, tp, real_pc);
observer_notify_inferior_call_post (call_thread_ptid, funaddr);
gdb::observers::inferior_call_post.notify (call_thread_ptid, funaddr);
tp = find_thread_ptid (call_thread_ptid);
if (tp != NULL)

4
gdb/infcmd.c
View File

@ -42,7 +42,7 @@
#include "block.h"
#include "solib.h"
#include <ctype.h>
#include "observer.h"
#include "observable.h"
#include "target-descriptions.h"
#include "user-regs.h"
#include "cli/cli-decode.h"
@ -499,7 +499,7 @@ post_create_inferior (struct target_ops *target, int from_tty)
if the now pushed target supports hardware watchpoints. */
breakpoint_re_set ();
observer_notify_inferior_created (target, from_tty);
gdb::observers::inferior_created.notify (target, from_tty);
}
/* Kill the inferior if already running. This function is designed

15
gdb/inferior.c
View File

@ -26,7 +26,7 @@
#include "gdbcmd.h"
#include "gdbthread.h"
#include "ui-out.h"
#include "observer.h"
#include "observable.h"
#include "gdbcore.h"
#include "symfile.h"
#include "environ.h"
@ -109,7 +109,7 @@ add_inferior_silent (int pid)
last->next = inf;
}
observer_notify_inferior_added (inf);
gdb::observers::inferior_added.notify (inf);
if (pid != 0)
inferior_appeared (inf, pid);
@ -176,7 +176,7 @@ delete_inferior (struct inferior *todel)
else
inferior_list = inf->next;
observer_notify_inferior_removed (inf);
gdb::observers::inferior_removed.notify (inf);
/* If this program space is rendered useless, remove it. */
if (program_space_empty_p (inf->pspace))
@ -206,7 +206,7 @@ exit_inferior_1 (struct inferior *inftoex, int silent)
iterate_over_threads (delete_thread_of_inferior, &arg);
observer_notify_inferior_exit (inf);
gdb::observers::inferior_exit.notify (inf);
inf->pid = 0;
inf->fake_pid_p = 0;
@ -284,7 +284,7 @@ inferior_appeared (struct inferior *inf, int pid)
inf->has_exit_code = 0;
inf->exit_code = 0;
observer_notify_inferior_appeared (inf);
gdb::observers::inferior_appeared.notify (inf);
}
void
@ -713,7 +713,7 @@ inferior_command (const char *args, int from_tty)
switch_to_thread (tp->ptid);
}
observer_notify_user_selected_context_changed
gdb::observers::user_selected_context_changed.notify
(USER_SELECTED_INFERIOR
| USER_SELECTED_THREAD
| USER_SELECTED_FRAME);
@ -724,7 +724,8 @@ inferior_command (const char *args, int from_tty)
switch_to_thread (null_ptid);
set_current_program_space (inf->pspace);
observer_notify_user_selected_context_changed (USER_SELECTED_INFERIOR);
gdb::observers::user_selected_context_changed.notify
(USER_SELECTED_INFERIOR);
}
}

4
gdb/inflow.c
View File

@ -24,7 +24,7 @@
#include "terminal.h"
#include "target.h"
#include "gdbthread.h"
#include "observer.h"
#include "observable.h"
#include <signal.h>
#include <fcntl.h>
#include "gdb_select.h"
@ -989,7 +989,7 @@ _initialize_inflow (void)
/* OK, figure out whether we have job control. */
have_job_control ();
observer_attach_inferior_exit (inflow_inferior_exit);
gdb::observers::inferior_exit.attach (inflow_inferior_exit);
inflow_inferior_data
= register_inferior_data_with_cleanup (NULL, inflow_inferior_data_cleanup);

28
gdb/infrun.c
View File

@ -38,7 +38,7 @@
#include "inf-loop.h"
#include "regcache.h"
#include "value.h"
#include "observer.h"
#include "observable.h"
#include "language.h"
#include "solib.h"
#include "main.h"
@ -2899,7 +2899,7 @@ clear_proceed_status (int step)
inferior->control.stop_soon = NO_STOP_QUIETLY;
}
observer_notify_about_to_proceed ();
gdb::observers::about_to_proceed.notify ();
}
/* Returns true if TP is still stopped at a breakpoint that needs
@ -3816,7 +3816,7 @@ check_curr_ui_sync_execution_done (void)
&& !gdb_in_secondary_prompt_p (ui))
{
target_terminal::ours ();
observer_notify_sync_execution_done ();
gdb::observers::sync_execution_done.notify ();
ui_register_input_event_handler (ui);
}
}
@ -5069,7 +5069,7 @@ handle_inferior_event_1 (struct execution_control_state *ecs)
/* Support the --return-child-result option. */
return_child_result_value = ecs->ws.value.integer;
observer_notify_exited (ecs->ws.value.integer);
gdb::observers::exited.notify (ecs->ws.value.integer);
}
else
{
@ -5098,7 +5098,7 @@ handle_inferior_event_1 (struct execution_control_state *ecs)
Cannot fill $_exitsignal with the correct signal number.\n"));
}
observer_notify_signal_exited (ecs->ws.value.sig);
gdb::observers::signal_exited.notify (ecs->ws.value.sig);
}
gdb_flush (gdb_stdout);
@ -5392,7 +5392,7 @@ Cannot fill $_exitsignal with the correct signal number.\n"));
if (handle_stop_requested (ecs))
return;
observer_notify_no_history ();
gdb::observers::no_history.notify ();
stop_waiting (ecs);
return;
}
@ -6096,7 +6096,7 @@ handle_signal_stop (struct execution_control_state *ecs)
{
/* The signal table tells us to print about this signal. */
target_terminal::ours_for_output ();
observer_notify_signal_received (ecs->event_thread->suspend.stop_signal);
gdb::observers::signal_received.notify (ecs->event_thread->suspend.stop_signal);
target_terminal::inferior ();
}
@ -8205,7 +8205,7 @@ normal_stop (void)
update_thread_list ();
if (last.kind == TARGET_WAITKIND_STOPPED && stopped_by_random_signal)
observer_notify_signal_received (inferior_thread ()->suspend.stop_signal);
gdb::observers::signal_received.notify (inferior_thread ()->suspend.stop_signal);
/* As with the notification of thread events, we want to delay
notifying the user that we've switched thread context until
@ -8330,10 +8330,10 @@ normal_stop (void)
/* Notify observers about the stop. This is where the interpreters
print the stop event. */
if (!ptid_equal (inferior_ptid, null_ptid))
observer_notify_normal_stop (inferior_thread ()->control.stop_bpstat,
gdb::observers::normal_stop.notify (inferior_thread ()->control.stop_bpstat,
stop_print_frame);
else
observer_notify_normal_stop (NULL, stop_print_frame);
gdb::observers::normal_stop.notify (NULL, stop_print_frame);
annotate_stopped ();
@ -9438,10 +9438,10 @@ enabled by default on some platforms."),
inferior_ptid = null_ptid;
target_last_wait_ptid = minus_one_ptid;
observer_attach_thread_ptid_changed (infrun_thread_ptid_changed);
observer_attach_thread_stop_requested (infrun_thread_stop_requested);
observer_attach_thread_exit (infrun_thread_thread_exit);
observer_attach_inferior_exit (infrun_inferior_exit);
gdb::observers::thread_ptid_changed.attach (infrun_thread_ptid_changed);
gdb::observers::thread_stop_requested.attach (infrun_thread_stop_requested);
gdb::observers::thread_exit.attach (infrun_thread_thread_exit);
gdb::observers::inferior_exit.attach (infrun_inferior_exit);
/* Explicitly create without lookup, since that tries to create a
value with a void typed value, and when we get here, gdbarch

8
gdb/jit.c
View File

@ -30,7 +30,7 @@
#include "gdbcmd.h"
#include "gdbcore.h"
#include "inferior.h"
#include "observer.h"
#include "observable.h"
#include "objfiles.h"
#include "regcache.h"
#include "symfile.h"
@ -1499,9 +1499,9 @@ _initialize_jit (void)
show_jit_debug,
&setdebuglist, &showdebuglist);
observer_attach_inferior_created (jit_inferior_created);
observer_attach_inferior_exit (jit_inferior_exit_hook);
observer_attach_breakpoint_deleted (jit_breakpoint_deleted);
gdb::observers::inferior_created.attach (jit_inferior_created);
gdb::observers::inferior_exit.attach (jit_inferior_exit_hook);
gdb::observers::breakpoint_deleted.attach (jit_breakpoint_deleted);
jit_objfile_data =
register_objfile_data_with_cleanup (NULL, free_objfile_data);

6
gdb/linux-tdep.c
View File

@ -32,7 +32,7 @@
#include "cli/cli-utils.h"
#include "arch-utils.h"
#include "gdb_obstack.h"
#include "observer.h"
#include "observable.h"
#include "objfiles.h"
#include "infcall.h"
#include "gdbcmd.h"
@ -2513,8 +2513,8 @@ _initialize_linux_tdep (void)
linux_inferior_data
= register_inferior_data_with_cleanup (NULL, linux_inferior_data_cleanup);
/* Observers used to invalidate the cache when needed. */
observer_attach_inferior_exit (invalidate_linux_cache_inf);
observer_attach_inferior_appeared (invalidate_linux_cache_inf);
gdb::observers::inferior_exit.attach (invalidate_linux_cache_inf);
gdb::observers::inferior_appeared.attach (invalidate_linux_cache_inf);
add_setshow_boolean_cmd ("use-coredump-filter", class_files,
&use_coredump_filter, _("\

8
gdb/linux-thread-db.c
View File

@ -35,7 +35,7 @@
#include "solib.h"
#include "solib-svr4.h"
#include "gdbcore.h"
#include "observer.h"
#include "observable.h"
#include "linux-nat.h"
#include "nat/linux-procfs.h"
#include "nat/linux-ptrace.h"
@ -960,7 +960,7 @@ thread_db_new_objfile (struct objfile *objfile)
if (objfile != NULL
/* libpthread with separate debug info has its debug info file already
loaded (and notified without successful thread_db initialization)
the time observer_notify_new_objfile is called for the library itself.
the time gdb::observers::new_objfile.notify is called for the library itself.
Static executables have their separate debug info loaded already
before the inferior has started. */
&& objfile->separate_debug_objfile_backlink == NULL
@ -1715,10 +1715,10 @@ Usage: info auto-load libthread-db"),
auto_load_info_cmdlist_get ());
/* Add ourselves to objfile event chain. */
observer_attach_new_objfile (thread_db_new_objfile);
gdb::observers::new_objfile.attach (thread_db_new_objfile);
/* Add ourselves to inferior_created event chain.
This is needed to handle debugging statically linked programs where
the new_objfile observer won't get called for libpthread. */
observer_attach_inferior_created (thread_db_inferior_created);
gdb::observers::inferior_created.attach (thread_db_inferior_created);
}

4
gdb/m68k-linux-tdep.c
View File

@ -32,7 +32,7 @@
#include "glibc-tdep.h"
#include "solib-svr4.h"
#include "auxv.h"
#include "observer.h"
#include "observable.h"
#include "elf/common.h"
#include "linux-tdep.h"
#include "regset.h"
@ -426,5 +426,5 @@ _initialize_m68k_linux_tdep (void)
{
gdbarch_register_osabi (bfd_arch_m68k, 0, GDB_OSABI_LINUX,
m68k_linux_init_abi);
observer_attach_inferior_created (m68k_linux_inferior_created);
gdb::observers::inferior_created.attach (m68k_linux_inferior_created);
}

6
gdb/mi/mi-cmd-break.c
View File

@ -24,7 +24,7 @@
#include "mi-out.h"
#include "breakpoint.h"
#include "mi-getopt.h"
#include "observer.h"
#include "observable.h"
#include "mi-main.h"
#include "mi-cmd-break.h"
#include "language.h"
@ -84,7 +84,7 @@ setup_breakpoint_reporting (void)
{
if (! mi_breakpoint_observers_installed)
{
observer_attach_breakpoint_created (breakpoint_notify);
gdb::observers::breakpoint_created.attach (breakpoint_notify);
mi_breakpoint_observers_installed = 1;
}
@ -394,7 +394,7 @@ mi_cmd_break_passcount (const char *command, char **argv, int argc)
if (t)
{
t->pass_count = p;
observer_notify_breakpoint_modified (t);
gdb::observers::breakpoint_modified.notify (t);
}
else
{

58
gdb/mi/mi-interp.c
View File

@ -30,7 +30,7 @@
#include "mi-out.h"
#include "mi-console.h"
#include "mi-common.h"
#include "observer.h"
#include "observable.h"
#include "gdbthread.h"
#include "solist.h"
#include "objfiles.h"
@ -1353,33 +1353,33 @@ _initialize_mi_interp (void)
interp_factory_register (INTERP_MI3, mi_interp_factory);
interp_factory_register (INTERP_MI, mi_interp_factory);
observer_attach_signal_received (mi_on_signal_received);
observer_attach_end_stepping_range (mi_on_end_stepping_range);
observer_attach_signal_exited (mi_on_signal_exited);
observer_attach_exited (mi_on_exited);
observer_attach_no_history (mi_on_no_history);
observer_attach_new_thread (mi_new_thread);
observer_attach_thread_exit (mi_thread_exit);
observer_attach_inferior_added (mi_inferior_added);
observer_attach_inferior_appeared (mi_inferior_appeared);
observer_attach_inferior_exit (mi_inferior_exit);
observer_attach_inferior_removed (mi_inferior_removed);
observer_attach_record_changed (mi_record_changed);
observer_attach_normal_stop (mi_on_normal_stop);
observer_attach_target_resumed (mi_on_resume);
observer_attach_solib_loaded (mi_solib_loaded);
observer_attach_solib_unloaded (mi_solib_unloaded);
observer_attach_about_to_proceed (mi_about_to_proceed);
observer_attach_traceframe_changed (mi_traceframe_changed);
observer_attach_tsv_created (mi_tsv_created);
observer_attach_tsv_deleted (mi_tsv_deleted);
observer_attach_tsv_modified (mi_tsv_modified);
observer_attach_breakpoint_created (mi_breakpoint_created);
observer_attach_breakpoint_deleted (mi_breakpoint_deleted);
observer_attach_breakpoint_modified (mi_breakpoint_modified);
observer_attach_command_param_changed (mi_command_param_changed);
observer_attach_memory_changed (mi_memory_changed);
observer_attach_sync_execution_done (mi_on_sync_execution_done);
observer_attach_user_selected_context_changed
gdb::observers::signal_received.attach (mi_on_signal_received);
gdb::observers::end_stepping_range.attach (mi_on_end_stepping_range);
gdb::observers::signal_exited.attach (mi_on_signal_exited);
gdb::observers::exited.attach (mi_on_exited);
gdb::observers::no_history.attach (mi_on_no_history);
gdb::observers::new_thread.attach (mi_new_thread);
gdb::observers::thread_exit.attach (mi_thread_exit);
gdb::observers::inferior_added.attach (mi_inferior_added);
gdb::observers::inferior_appeared.attach (mi_inferior_appeared);
gdb::observers::inferior_exit.attach (mi_inferior_exit);
gdb::observers::inferior_removed.attach (mi_inferior_removed);
gdb::observers::record_changed.attach (mi_record_changed);
gdb::observers::normal_stop.attach (mi_on_normal_stop);
gdb::observers::target_resumed.attach (mi_on_resume);
gdb::observers::solib_loaded.attach (mi_solib_loaded);
gdb::observers::solib_unloaded.attach (mi_solib_unloaded);
gdb::observers::about_to_proceed.attach (mi_about_to_proceed);
gdb::observers::traceframe_changed.attach (mi_traceframe_changed);
gdb::observers::tsv_created.attach (mi_tsv_created);
gdb::observers::tsv_deleted.attach (mi_tsv_deleted);
gdb::observers::tsv_modified.attach (mi_tsv_modified);
gdb::observers::breakpoint_created.attach (mi_breakpoint_created);
gdb::observers::breakpoint_deleted.attach (mi_breakpoint_deleted);
gdb::observers::breakpoint_modified.attach (mi_breakpoint_modified);
gdb::observers::command_param_changed.attach (mi_command_param_changed);
gdb::observers::memory_changed.attach (mi_memory_changed);
gdb::observers::sync_execution_done.attach (mi_on_sync_execution_done);
gdb::observers::user_selected_context_changed.attach
(mi_user_selected_context_changed);
}

10
gdb/mi/mi-main.c
View File

@ -52,7 +52,7 @@
#include "linespec.h"
#include "extension.h"
#include "gdbcmd.h"
#include "observer.h"
#include "observable.h"
#include "common/gdb_optional.h"
#include "common/byte-vector.h"
@ -573,8 +573,8 @@ mi_cmd_thread_select (const char *command, char **argv, int argc)
/* Notify if the thread has effectively changed. */
if (!ptid_equal (inferior_ptid, previous_ptid))
{
observer_notify_user_selected_context_changed (USER_SELECTED_THREAD
| USER_SELECTED_FRAME);
gdb::observers::user_selected_context_changed.notify
(USER_SELECTED_THREAD | USER_SELECTED_FRAME);
}
}
@ -2024,8 +2024,8 @@ mi_execute_command (const char *cmd, int from_tty)
if (report_change)
{
observer_notify_user_selected_context_changed
(USER_SELECTED_THREAD | USER_SELECTED_FRAME);
gdb::observers::user_selected_context_changed.notify
(USER_SELECTED_THREAD | USER_SELECTED_FRAME);
}
}
}

4
gdb/objfiles.c
View File

@ -46,7 +46,7 @@
#include "addrmap.h"
#include "arch-utils.h"
#include "exec.h"
#include "observer.h"
#include "observable.h"
#include "complaints.h"
#include "psymtab.h"
#include "solist.h"
@ -617,7 +617,7 @@ free_objfile_separate_debug (struct objfile *objfile)
objfile::~objfile ()
{
/* First notify observers that this objfile is about to be freed. */
observer_notify_free_objfile (this);
gdb::observers::free_objfile.notify (this);
/* Free all separate debug objfiles. */
free_objfile_separate_debug (this);

99
gdb/observable.c Normal file
View File

@ -0,0 +1,99 @@
/* GDB Notifications to Observers.
Copyright (C) 2003-2018 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "observable.h"
#include "command.h"
#include "gdbcmd.h"
namespace gdb
{
namespace observers
{
unsigned int observer_debug;
#define DEFINE_OBSERVABLE(name) decltype (name) name (# name)
DEFINE_OBSERVABLE (normal_stop);
DEFINE_OBSERVABLE (signal_received);
DEFINE_OBSERVABLE (end_stepping_range);
DEFINE_OBSERVABLE (signal_exited);
DEFINE_OBSERVABLE (exited);
DEFINE_OBSERVABLE (no_history);
DEFINE_OBSERVABLE (sync_execution_done);
DEFINE_OBSERVABLE (command_error);
DEFINE_OBSERVABLE (target_changed);
DEFINE_OBSERVABLE (executable_changed);
DEFINE_OBSERVABLE (inferior_created);
DEFINE_OBSERVABLE (record_changed);
DEFINE_OBSERVABLE (solib_loaded);
DEFINE_OBSERVABLE (solib_unloaded);
DEFINE_OBSERVABLE (new_objfile);
DEFINE_OBSERVABLE (free_objfile);
DEFINE_OBSERVABLE (new_thread);
DEFINE_OBSERVABLE (thread_exit);
DEFINE_OBSERVABLE (thread_stop_requested);
DEFINE_OBSERVABLE (target_resumed);
DEFINE_OBSERVABLE (about_to_proceed);
DEFINE_OBSERVABLE (breakpoint_created);
DEFINE_OBSERVABLE (breakpoint_deleted);
DEFINE_OBSERVABLE (breakpoint_modified);
DEFINE_OBSERVABLE (traceframe_changed);
DEFINE_OBSERVABLE (architecture_changed);
DEFINE_OBSERVABLE (thread_ptid_changed);
DEFINE_OBSERVABLE (inferior_added);
DEFINE_OBSERVABLE (inferior_appeared);
DEFINE_OBSERVABLE (inferior_exit);
DEFINE_OBSERVABLE (inferior_removed);
DEFINE_OBSERVABLE (memory_changed);
DEFINE_OBSERVABLE (before_prompt);
DEFINE_OBSERVABLE (gdb_datadir_changed);
DEFINE_OBSERVABLE (command_param_changed);
DEFINE_OBSERVABLE (tsv_created);
DEFINE_OBSERVABLE (tsv_deleted);
DEFINE_OBSERVABLE (tsv_modified);
DEFINE_OBSERVABLE (inferior_call_pre);
DEFINE_OBSERVABLE (inferior_call_post);
DEFINE_OBSERVABLE (register_changed);
DEFINE_OBSERVABLE (user_selected_context_changed);
} /* namespace observers */
} /* namespace gdb */
static void
show_observer_debug (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
fprintf_filtered (file, _("Observer debugging is %s.\n"), value);
}
void
_initialize_observer (void)
{
add_setshow_zuinteger_cmd ("observer", class_maintenance,
&gdb::observers::observer_debug, _("\
Set observer debugging."), _("\
Show observer debugging."), _("\
When non-zero, observer debugging is enabled."),
NULL,
show_observer_debug,
&setdebuglist, &showdebuglist);
}

235
gdb/observable.h Normal file
View File

@ -0,0 +1,235 @@
/* Observers
Copyright (C) 2016-2018 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#if !defined (GDB_OBSERVER_H)
#define GDB_OBSERVER_H
#include "common/observable.h"
struct bpstats;
struct so_list;
struct objfile;
struct thread_info;
struct inferior;
struct trace_state_variable;
namespace gdb
{
namespace observers
{
/* The inferior has stopped for real. The bs argument describes the
breakpoints were are stopped at, if any. Second argument
print_frame non-zero means display the location where the
inferior has stopped.
gdb notifies all normal_stop observers when the inferior execution
has just stopped, the associated messages and annotations have been
printed, and the control is about to be returned to the user.
Note that the normal_stop notification is not emitted when the
execution stops due to a breakpoint, and this breakpoint has a
condition that is not met. If the breakpoint has any associated
commands list, the commands are executed after the notification is
emitted. */
extern observable<struct bpstats *, int> normal_stop;
/* The inferior was stopped by a signal. */
extern observable<enum gdb_signal> signal_received;
/* We are done with a step/next/si/ni command. */
extern observable<> end_stepping_range;
/* The inferior was terminated by a signal. */
extern observable<enum gdb_signal> signal_exited;
/* The inferior program is finished. */
extern observable<int> exited;
/* Reverse execution: target ran out of history info. */
extern observable<> no_history;
/* A synchronous command finished. */
extern observable<> sync_execution_done;
/* An error was caught while executing a command. */
extern observable<> command_error;
/* The target's register contents have changed. */
extern observable<struct target_ops *> target_changed;
/* The executable being debugged by GDB has changed: The user
decided to debug a different program, or the program he was
debugging has been modified since being loaded by the debugger
(by being recompiled, for instance). */
extern observable<> executable_changed;
/* gdb has just connected to an inferior. For 'run', gdb calls this
observer while the inferior is still stopped at the entry-point
instruction. For 'attach' and 'core', gdb calls this observer
immediately after connecting to the inferior, and before any
information on the inferior has been printed. */
extern observable<struct target_ops *, int> inferior_created;
/* The status of process record for inferior inferior in gdb has
changed. The process record is started if started is true, and
the process record is stopped if started is false.
When started is true, method indicates the short name of the
method used for recording. If the method supports multiple
formats, format indicates which one is being used, otherwise it
is NULL. When started is false, they are both NULL. */
extern observable<struct inferior *, int, const char *, const char *>
record_changed;
/* The shared library specified by solib has been loaded. Note that
when gdb calls this observer, the library's symbols probably
haven't been loaded yet. */
extern observable<struct so_list *> solib_loaded;
/* The shared library specified by solib has been unloaded. Note
that when gdb calls this observer, the library's symbols have not
been unloaded yet, and thus are still available. */
extern observable<struct so_list *> solib_unloaded;
/* The symbol file specified by objfile has been loaded. Called
with objfile equal to NULL to indicate previously loaded symbol
table data has now been invalidated. */
extern observable<struct objfile *> new_objfile;
/* The object file specified by objfile is about to be freed. */
extern observable<struct objfile *> free_objfile;
/* The thread specified by t has been created. */
extern observable<struct thread_info *> new_thread;
/* The thread specified by t has exited. The silent argument
indicates that gdb is removing the thread from its tables without
wanting to notify the user about it. */
extern observable<struct thread_info *, int> thread_exit;
/* An explicit stop request was issued to ptid. If ptid equals
minus_one_ptid, the request applied to all threads. If
ptid_is_pid(ptid) returns true, the request applied to all
threads of the process pointed at by ptid. Otherwise, the
request applied to the single thread pointed at by ptid. */
extern observable<ptid_t> thread_stop_requested;
/* The target was resumed. The ptid parameter specifies which
thread was resume, and may be RESUME_ALL if all threads are
resumed. */
extern observable<ptid_t> target_resumed;
/* The target is about to be proceeded. */
extern observable<> about_to_proceed;
/* A new breakpoint b has been created. */
extern observable<struct breakpoint *> breakpoint_created;
/* A breakpoint has been destroyed. The argument b is the
pointer to the destroyed breakpoint. */
extern observable<struct breakpoint *> breakpoint_deleted;
/* A breakpoint has been modified in some way. The argument b
is the modified breakpoint. */
extern observable<struct breakpoint *> breakpoint_modified;
/* The trace frame is changed to tfnum (e.g., by using the 'tfind'
command). If tfnum is negative, it means gdb resumes live
debugging. The number of the tracepoint associated with this
traceframe is tpnum. */
extern observable<int, int> traceframe_changed;
/* The current architecture has changed. The argument newarch is a
pointer to the new architecture. */
extern observable<struct gdbarch *> architecture_changed;
/* The thread's ptid has changed. The old_ptid parameter specifies
the old value, and new_ptid specifies the new value. */
extern observable<ptid_t, ptid_t> thread_ptid_changed;
/* The inferior inf has been added to the list of inferiors. At
this point, it might not be associated with any process. */
extern observable<struct inferior *> inferior_added;
/* The inferior identified by inf has been attached to a
process. */
extern observable<struct inferior *> inferior_appeared;
/* Either the inferior associated with inf has been detached from
the process, or the process has exited. */
extern observable<struct inferior *> inferior_exit;
/* The inferior inf has been removed from the list of inferiors.
This method is called immediately before freeing inf. */
extern observable<struct inferior *> inferior_removed;
/* Bytes from data to data + len have been written to the inferior
at addr. */
extern observable<struct inferior *, CORE_ADDR, ssize_t, const bfd_byte *>
memory_changed;
/* Called before a top-level prompt is displayed. current_prompt is
the current top-level prompt. */
extern observable<const char *> before_prompt;
/* Variable gdb_datadir has been set. The value may not necessarily
change. */
extern observable<> gdb_datadir_changed;
/* The parameter of some 'set' commands in console are changed.
This method is called after a command 'set param value'. param
is the parameter of 'set' command, and value is the value of
changed parameter. */
extern observable<const char *, const char *> command_param_changed;
/* The new trace state variable tsv is created. */
extern observable<const struct trace_state_variable *> tsv_created;
/* The trace state variable tsv is deleted. If tsv is NULL, all
trace state variables are deleted. */
extern observable<const struct trace_state_variable *> tsv_deleted;
/* The trace state value tsv is modified. */
extern observable<const struct trace_state_variable *> tsv_modified;
/* An inferior function at address is about to be called in thread
thread. */
extern observable<ptid_t, CORE_ADDR> inferior_call_pre;
/* The inferior function at address has just been called. This
observer is called even if the inferior exits during the call.
thread is the thread in which the function was called, which may
be different from the current thread. */
extern observable<ptid_t, CORE_ADDR> inferior_call_post;
/* A register in the inferior has been modified by the gdb user. */
extern observable<struct frame_info *, int> register_changed;
/* The user-selected inferior, thread and/or frame has changed. The
user_select_what flag specifies if the inferior, thread and/or
frame has changed. */
extern observable<user_selected_what> user_selected_context_changed;
} /* namespace observers */
} /* namespace gdb */
#endif /* GDB_OBSERVER_H */

215
gdb/observer.c
View File

@ -1,215 +0,0 @@
/* GDB Notifications to Observers.
Copyright (C) 2003-2018 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* An observer is an entity who is interested in being notified when GDB
reaches certain states, or certain events occur in GDB. The entity being
observed is called the Subject. To receive notifications, the observer
attaches a callback to the subject. One subject can have several
observers.
This file implements an internal generic low-level event notification
mechanism based on the Observer paradigm described in the book "Design
Patterns". This generic event notification mechansim is then re-used
to implement the exported high-level notification management routines
for all possible notifications.
The current implementation of the generic observer provides support
for contextual data. This contextual data is given to the subject
when attaching the callback. In return, the subject will provide
this contextual data back to the observer as a parameter of the
callback.
FIXME: The current support for the contextual data is only partial,
as it lacks a mechanism that would deallocate this data when the
callback is detached. This is not a problem so far, as this contextual
data is only used internally to hold a function pointer. Later on,
if a certain observer needs to provide support for user-level
contextual data, then the generic notification mechanism will need
need to be enhanced to allow the observer to provide a routine to
deallocate the data when attaching the callback.
This file is currently maintained by hand, but the long term plan
if the number of different notifications starts growing is to create
a new script (observer.sh) that would generate this file, and the
associated documentation. */
#include "defs.h"
#include "observer.h"
#include "command.h"
#include "gdbcmd.h"
static unsigned int observer_debug;
static void
show_observer_debug (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
fprintf_filtered (file, _("Observer debugging is %s.\n"), value);
}
/* The internal generic observer. */
typedef void (generic_observer_notification_ftype) (const void *data,
const void *args);
struct observer
{
generic_observer_notification_ftype *notify;
/* No memory management needed for the following field for now. */
void *data;
};
/* A list of observers, maintained by the subject. A subject is
actually represented by its list of observers. */
struct observer_list
{
struct observer_list *next;
struct observer *observer;
};
/* Allocate a struct observer_list, intended to be used as a node
in the list of observers maintained by a subject. */
static struct observer_list *
xalloc_observer_list_node (void)
{
struct observer_list *node = XNEW (struct observer_list);
node->observer = XNEW (struct observer);
return node;
}
/* The opposite of xalloc_observer_list_node, frees the memory for
the given node. */
static void
xfree_observer_list_node (struct observer_list *node)
{
xfree (node->observer);
xfree (node);
}
/* Attach the callback NOTIFY to a SUBJECT. The DATA is also stored,
in order for the subject to provide it back to the observer during
a notification. */
static struct observer *
generic_observer_attach (struct observer_list **subject,
generic_observer_notification_ftype * notify,
void *data)
{
struct observer_list *observer_list = xalloc_observer_list_node ();
observer_list->next = *subject;
observer_list->observer->notify = notify;
observer_list->observer->data = data;
*subject = observer_list;
return observer_list->observer;
}
/* Remove the given OBSERVER from the SUBJECT. Once detached, OBSERVER
should no longer be used, as it is no longer valid. */
static void
generic_observer_detach (struct observer_list **subject,
const struct observer *observer)
{
struct observer_list *previous_node = NULL;
struct observer_list *current_node = *subject;
while (current_node != NULL)
{
if (current_node->observer == observer)
{
if (previous_node != NULL)
previous_node->next = current_node->next;
else
*subject = current_node->next;
xfree_observer_list_node (current_node);
return;
}
previous_node = current_node;
current_node = current_node->next;
}
/* We should never reach this point. However, this should not be
a very serious error, so simply report a warning to the user. */
warning (_("Failed to detach observer"));
}
/* Send a notification to all the observers of SUBJECT. ARGS is passed to
all observers as an argument to the notification callback. */
static void
generic_observer_notify (struct observer_list *subject, const void *args)
{
struct observer_list *current_node = subject;
while (current_node != NULL)
{
(*current_node->observer->notify) (current_node->observer->data, args);
current_node = current_node->next;
}
}
/* The following code is only used to unit-test the observers from our
testsuite. DO NOT USE IT within observer.c (or anywhere else for
that matter)! */
/* If we define these variables and functions as `static', the
compiler will optimize them out. */
int observer_test_first_observer = 0;
int observer_test_second_observer = 0;
int observer_test_third_observer = 0;
void
observer_test_first_notification_function (int arg)
{
observer_test_first_observer++;
}
void
observer_test_second_notification_function (int arg)
{
observer_test_second_observer++;
}
void
observer_test_third_notification_function (int arg)
{
observer_test_third_observer++;
}
void
_initialize_observer (void)
{
add_setshow_zuinteger_cmd ("observer", class_maintenance,
&observer_debug, _("\
Set observer debugging."), _("\
Show observer debugging."), _("\
When non-zero, observer debugging is enabled."),
NULL,
show_observer_debug,
&setdebuglist, &showdebuglist);
}
#include "observer.inc"

200
gdb/observer.sh
View File

@ -1,200 +0,0 @@
#!/bin/sh -e
# Make certain that the script is not running in an internationalized
# environment.
LANG=C ; export LANG
LC_ALL=C ; export LC_ALL
if test $# -ne 3
then
echo "Usage: $0 <h|inc> <observer.texi> <observer.out>" 1>&2
exit 0
fi
lang=$1 ; shift
texi=$1 ; shift
o=$1
case $lang in
h) tmp=htmp ;;
inc) tmp=itmp ;;
esac
otmp="`echo $1 | sed -e 's,\.[^.]*$,,'`.$tmp"; shift
echo "Creating ${otmp}" 1>&2
rm -f ${otmp}
# Can use any of the following: cat cmp cp diff echo egrep expr false
# grep install-info ln ls mkdir mv pwd rm rmdir sed sleep sort tar
# test touch true
cat <<EOF >>${otmp}
/* GDB Notifications to Observers.
Copyright (C) 2004-2018 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
--
This file was generated using observer.sh and observer.texi. */
EOF
case $lang in
h) cat <<EOF >>${otmp}
#ifndef OBSERVER_H
#define OBSERVER_H
struct observer;
struct bpstats;
struct so_list;
struct objfile;
struct thread_info;
struct inferior;
struct trace_state_variable;
EOF
;;
esac
# We are about to set IFS=:, so DOS-style file names with a drive
# letter and a colon will be in trouble.
if test -n "$DJGPP"
then
texi=`echo $texi | sed -e 's,^\([a-zA-Z]\):/,/dev/\1/,'`
fi
# generate a list of events that can be observed
IFS=:
sed -n '
/@deftypefun void/{
# Save original line for later processing into the actual parameter
h
# Convert from: @deftypefun void EVENT (TYPE @var{PARAM},...)
# to event and formals: EVENT:TYPE PARAM, ...:
s/^.* void \([a-z_][a-z_]*\) (\(.*\))$/\1:\2/
s/@var{//g
s/}//g
# Switch to held
x
# Convert from: @deftypefun void FUNC (TYPE @var{PARAM},...)
# to actuals: PARAM, ...
s/^[^{]*[{]*//
s/[}]*[^}]*$//
s/}[^{]*{/, /g
# Combine held (EVENT:TYPE PARAM, ...:) and pattern (PARAM, ...) into
# FUNC:TYPE PARAM, ...:PARAM, ...
H
x
s/\n/:/g
p
}
' $texi | while read event formal actual
do
case $lang in
h) cat <<EOF >>${otmp}
/* ${event} notifications. */
typedef void (observer_${event}_ftype) (${formal});
extern struct observer *observer_attach_${event} (observer_${event}_ftype *f);
extern void observer_detach_${event} (struct observer *observer);
extern void observer_notify_${event} (${formal});
EOF
;;
inc)
cat <<EOF >>${otmp}
/* ${event} notifications. */
static struct observer_list *${event}_subject = NULL;
EOF
if test "$formal" != "void"; then
cat<<EOF >>${otmp}
struct ${event}_args { `echo "${formal}" | sed -e 's/,/;/g'`; };
EOF
fi
cat <<EOF >>${otmp}
static void
observer_${event}_notification_stub (const void *data, const void *args_data)
{
observer_${event}_ftype *notify = (observer_${event}_ftype *) data;
EOF
notify_args=`echo ${actual} | sed -e 's/\([a-z0-9_][a-z0-9_]*\)/args->\1/g'`
if test ! -z "${notify_args}"; then
cat<<EOF >>${otmp}
const struct ${event}_args *args = (const struct ${event}_args *) args_data;
EOF
fi
cat <<EOF >>${otmp}
notify (${notify_args});
}
struct observer *
observer_attach_${event} (observer_${event}_ftype *f)
{
return generic_observer_attach (&${event}_subject,
&observer_${event}_notification_stub,
(void *) f);
}
void
observer_detach_${event} (struct observer *observer)
{
generic_observer_detach (&${event}_subject, observer);
}
void
observer_notify_${event} (${formal})
{
EOF
if test "$formal" != "void"; then
cat<<EOF >>${otmp}
struct ${event}_args args;
`echo ${actual} | sed -e 's/\([a-z0-9_][a-z0-9_]*\)/args.\1 = \1/g'`;
EOF
else
echo "char *args = NULL;" >> ${otmp}
fi
cat<<EOF >>${otmp}
if (observer_debug)
fprintf_unfiltered (gdb_stdlog, "observer_notify_${event}() called\n");
generic_observer_notify (${event}_subject, &args);
}
EOF
;;
esac
done
case $lang in
h) cat <<EOF >>${otmp}
#endif /* OBSERVER_H */
EOF
esac
echo Moving ${otmp} to ${o}
mv ${otmp} ${o}

4
gdb/ppc-linux-nat.c
View File

@ -18,7 +18,7 @@
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "observer.h"
#include "observable.h"
#include "frame.h"
#include "inferior.h"
#include "gdbthread.h"
@ -2500,7 +2500,7 @@ _initialize_ppc_linux_nat (void)
t->to_read_description = ppc_linux_read_description;
t->to_auxv_parse = ppc_linux_auxv_parse;
observer_attach_thread_exit (ppc_linux_thread_exit);
gdb::observers::thread_exit.attach (ppc_linux_thread_exit);
/* Register the target. */
linux_nat_add_target (t);

8
gdb/ppc-linux-tdep.c
View File

@ -41,7 +41,7 @@
#include "trad-frame.h"
#include "frame-unwind.h"
#include "tramp-frame.h"
#include "observer.h"
#include "observable.h"
#include "auxv.h"
#include "elf/common.h"
#include "elf/ppc64.h"
@ -1857,9 +1857,9 @@ _initialize_ppc_linux_tdep (void)
ppc_linux_init_abi);
/* Attach to observers to track __spe_current_active_context. */
observer_attach_inferior_created (ppc_linux_spe_context_inferior_created);
observer_attach_solib_loaded (ppc_linux_spe_context_solib_loaded);
observer_attach_solib_unloaded (ppc_linux_spe_context_solib_unloaded);
gdb::observers::inferior_created.attach (ppc_linux_spe_context_inferior_created);
gdb::observers::solib_loaded.attach (ppc_linux_spe_context_solib_loaded);
gdb::observers::solib_unloaded.attach (ppc_linux_spe_context_solib_unloaded);
/* Initialize the Linux target descriptions. */
initialize_tdesc_powerpc_32l ();

4
gdb/printcmd.c
View File

@ -39,7 +39,7 @@
#include "block.h"
#include "disasm.h"
#include "target-float.h"
#include "observer.h"
#include "observable.h"
#include "solist.h"
#include "parser-defs.h"
#include "charset.h"
@ -2623,7 +2623,7 @@ _initialize_printcmd (void)
current_display_number = -1;
observer_attach_free_objfile (clear_dangling_display_expressions);
gdb::observers::free_objfile.attach (clear_dangling_display_expressions);
add_info ("address", info_address_command,
_("Describe where symbol SYM is stored."));

4
gdb/procfs.c
View File

@ -45,7 +45,7 @@
#include "inflow.h"
#include "auxv.h"
#include "procfs.h"
#include "observer.h"
#include "observable.h"
#include "common/scoped_fd.h"
/* This module provides the interface between GDB and the
@ -3751,7 +3751,7 @@ proc_untrace_sysexit_cmd (const char *args, int from_tty)
void
_initialize_procfs (void)
{
observer_attach_inferior_created (procfs_inferior_created);
gdb::observers::inferior_created.attach (procfs_inferior_created);
add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd,
_("Give a trace of entries into the syscall."));

8
gdb/python/py-breakpoint.c
View File

@ -25,7 +25,7 @@
#include "breakpoint.h"
#include "gdbcmd.h"
#include "gdbthread.h"
#include "observer.h"
#include "observable.h"
#include "cli/cli-script.h"
#include "ada-lang.h"
#include "arch-utils.h"
@ -1086,9 +1086,9 @@ gdbpy_initialize_breakpoints (void)
(PyObject *) &breakpoint_object_type) < 0)
return -1;
observer_attach_breakpoint_created (gdbpy_breakpoint_created);
observer_attach_breakpoint_deleted (gdbpy_breakpoint_deleted);
observer_attach_breakpoint_modified (gdbpy_breakpoint_modified);
gdb::observers::breakpoint_created.attach (gdbpy_breakpoint_created);
gdb::observers::breakpoint_deleted.attach (gdbpy_breakpoint_deleted);
gdb::observers::breakpoint_modified.attach (gdbpy_breakpoint_modified);
/* Add breakpoint types constants. */
for (i = 0; pybp_codes[i].name; ++i)

6
gdb/python/py-finishbreakpoint.c
View File

@ -26,7 +26,7 @@
#include "gdbthread.h"
#include "arch-utils.h"
#include "language.h"
#include "observer.h"
#include "observable.h"
#include "inferior.h"
#include "block.h"
#include "location.h"
@ -416,8 +416,8 @@ gdbpy_initialize_finishbreakpoints (void)
(PyObject *) &finish_breakpoint_object_type) < 0)
return -1;
observer_attach_normal_stop (bpfinishpy_handle_stop);
observer_attach_inferior_exit (bpfinishpy_handle_exit);
gdb::observers::normal_stop.attach (bpfinishpy_handle_stop);
gdb::observers::inferior_exit.attach (bpfinishpy_handle_exit);
return 0;
}

26
gdb/python/py-inferior.c
View File

@ -22,7 +22,7 @@
#include "gdbthread.h"
#include "inferior.h"
#include "objfiles.h"
#include "observer.h"
#include "observable.h"
#include "python-internal.h"
#include "arch-utils.h"
#include "language.h"
@ -926,18 +926,18 @@ gdbpy_initialize_inferior (void)
infpy_inf_data_key =
register_inferior_data_with_cleanup (NULL, py_free_inferior);
observer_attach_new_thread (add_thread_object);
observer_attach_thread_exit (delete_thread_object);
observer_attach_normal_stop (python_on_normal_stop);
observer_attach_target_resumed (python_on_resume);
observer_attach_inferior_call_pre (python_on_inferior_call_pre);
observer_attach_inferior_call_post (python_on_inferior_call_post);
observer_attach_memory_changed (python_on_memory_change);
observer_attach_register_changed (python_on_register_change);
observer_attach_inferior_exit (python_inferior_exit);
observer_attach_new_objfile (python_new_objfile);
observer_attach_inferior_added (python_new_inferior);
observer_attach_inferior_removed (python_inferior_deleted);
gdb::observers::new_thread.attach (add_thread_object);
gdb::observers::thread_exit.attach (delete_thread_object);
gdb::observers::normal_stop.attach (python_on_normal_stop);
gdb::observers::target_resumed.attach (python_on_resume);
gdb::observers::inferior_call_pre.attach (python_on_inferior_call_pre);
gdb::observers::inferior_call_post.attach (python_on_inferior_call_post);
gdb::observers::memory_changed.attach (python_on_memory_change);
gdb::observers::register_changed.attach (python_on_register_change);
gdb::observers::inferior_exit.attach (python_inferior_exit);
gdb::observers::new_objfile.attach (python_new_objfile);
gdb::observers::inferior_added.attach (python_new_inferior);
gdb::observers::inferior_removed.attach (python_inferior_deleted);
membuf_object_type.tp_new = PyType_GenericNew;
if (PyType_Ready (&membuf_object_type) < 0)

4
gdb/python/py-unwind.c
View File

@ -23,7 +23,7 @@
#include "gdb_obstack.h"
#include "gdbcmd.h"
#include "language.h"
#include "observer.h"
#include "observable.h"
#include "python-internal.h"
#include "regcache.h"
#include "valprint.h"
@ -662,7 +662,7 @@ gdbpy_initialize_unwind (void)
&setdebuglist, &showdebuglist);
pyuw_gdbarch_data
= gdbarch_data_register_post_init (pyuw_gdbarch_data_init);
observer_attach_architecture_changed (pyuw_on_new_gdbarch);
gdb::observers::architecture_changed.attach (pyuw_on_new_gdbarch);
if (PyType_Ready (&pending_frame_object_type) < 0)
return -1;

4
gdb/ravenscar-thread.c
View File

@ -25,7 +25,7 @@
#include "inferior.h"
#include "command.h"
#include "ravenscar-thread.h"
#include "observer.h"
#include "observable.h"
#include "gdbcmd.h"
#include "top.h"
#include "regcache.h"
@ -632,7 +632,7 @@ _initialize_ravenscar (void)
/* Notice when the inferior is created in order to push the
ravenscar ops if needed. */
observer_attach_inferior_created (ravenscar_inferior_created);
gdb::observers::inferior_created.attach (ravenscar_inferior_created);
complete_target_initialization (&ravenscar_ops);

22
gdb/record-btrace.c
View File

@ -26,7 +26,7 @@
#include "target.h"
#include "gdbcmd.h"
#include "disasm.h"
#include "observer.h"
#include "observable.h"
#include "cli/cli-utils.h"
#include "source.h"
#include "ui-out.h"
@ -44,8 +44,9 @@
/* The target_ops of record-btrace. */
static struct target_ops record_btrace_ops;
/* A new thread observer enabling branch tracing for the new thread. */
static struct observer *record_btrace_thread_observer;
/* Token associated with a new-thread observer enabling branch tracing
for the new thread. */
static const gdb::observers::token record_btrace_thread_observer_token;
/* Memory access types used in set/show record btrace replay-memory-access. */
static const char replay_memory_access_read_only[] = "read-only";
@ -166,8 +167,8 @@ record_btrace_auto_enable (void)
{
DEBUG ("attach thread observer");
record_btrace_thread_observer
= observer_attach_new_thread (record_btrace_enable_warn);
gdb::observers::new_thread.attach (record_btrace_enable_warn,
record_btrace_thread_observer_token);
}
/* Disable automatic tracing of new threads. */
@ -175,14 +176,9 @@ record_btrace_auto_enable (void)
static void
record_btrace_auto_disable (void)
{
/* The observer may have been detached, already. */
if (record_btrace_thread_observer == NULL)
return;
DEBUG ("detach thread observer");
observer_detach_new_thread (record_btrace_thread_observer);
record_btrace_thread_observer = NULL;
gdb::observers::new_thread.detach (record_btrace_thread_observer_token);
}
/* The record-btrace async event handler function. */
@ -210,7 +206,7 @@ record_btrace_push_target (void)
record_btrace_generating_corefile = 0;
format = btrace_format_short_string (record_btrace_conf.format);
observer_notify_record_changed (current_inferior (), 1, "btrace", format);
gdb::observers::record_changed.notify (current_inferior (), 1, "btrace", format);
}
/* Disable btrace on a set of threads on scope exit. */
@ -258,8 +254,6 @@ record_btrace_open (const char *args, int from_tty)
if (!target_has_execution)
error (_("The program is not being run."));
gdb_assert (record_btrace_thread_observer == NULL);
ALL_NON_EXITED_THREADS (tp)
if (args == NULL || *args == 0 || number_is_in_list (args, tp->global_num))
{

4
gdb/record-full.c
View File

@ -33,7 +33,7 @@
#include "event-loop.h"
#include "inf-loop.h"
#include "gdb_bfd.h"
#include "observer.h"
#include "observable.h"
#include "infrun.h"
#include "common/gdb_unlinker.h"
#include "common/byte-vector.h"
@ -851,7 +851,7 @@ record_full_open (const char *name, int from_tty)
record_full_init_record_breakpoints ();
observer_notify_record_changed (current_inferior (), 1, "full", NULL);
gdb::observers::record_changed.notify (current_inferior (), 1, "full", NULL);
}
/* "to_close" target method. Close the process record target. */

4
gdb/record.c
View File

@ -21,7 +21,7 @@
#include "gdbcmd.h"
#include "completer.h"
#include "record.h"
#include "observer.h"
#include "observable.h"
#include "inferior.h"
#include "common/common-utils.h"
#include "cli/cli-utils.h"
@ -311,7 +311,7 @@ cmd_record_stop (const char *args, int from_tty)
printf_unfiltered (_("Process record is stopped and all execution "
"logs are deleted.\n"));
observer_notify_record_changed (current_inferior (), 0, NULL, NULL);
gdb::observers::record_changed.notify (current_inferior (), 0, NULL, NULL);
}
/* The "set record" command. */

7
gdb/regcache.c
View File

@ -24,7 +24,7 @@
#include "gdbcmd.h"
#include "regcache.h"
#include "reggroups.h"
#include "observer.h"
#include "observable.h"
#include "regset.h"
#include <forward_list>
@ -1868,8 +1868,9 @@ _initialize_regcache (void)
regcache_descr_handle
= gdbarch_data_register_post_init (init_regcache_descr);
observer_attach_target_changed (regcache_observer_target_changed);
observer_attach_thread_ptid_changed (regcache::regcache_thread_ptid_changed);
gdb::observers::target_changed.attach (regcache_observer_target_changed);
gdb::observers::thread_ptid_changed.attach
(regcache::regcache_thread_ptid_changed);
add_com ("flushregs", class_maintenance, reg_flush_command,
_("Force gdb to flush its register cache (maintainer command)"));

2
gdb/remote-notif.c
View File

@ -34,7 +34,7 @@
#include "defs.h"
#include "remote.h"
#include "remote-notif.h"
#include "observer.h"
#include "observable.h"
#include "event-loop.h"
#include "target.h"
#include "inferior.h"

10
gdb/remote.c
View File

@ -36,7 +36,7 @@
#include "remote-notif.h"
#include "regcache.h"
#include "value.h"
#include "observer.h"
#include "observable.h"
#include "solib.h"
#include "cli/cli-decode.h"
#include "cli/cli-setshow.h"
@ -3824,9 +3824,9 @@ print_one_stopped_thread (struct thread_info *thread)
enum gdb_signal sig = ws->value.sig;
if (signal_print_state (sig))
observer_notify_signal_received (sig);
gdb::observers::signal_received.notify (sig);
}
observer_notify_normal_stop (NULL, 1);
gdb::observers::normal_stop.notify (NULL, 1);
}
/* Process all initial stop replies the remote side sent in response
@ -13925,10 +13925,10 @@ _initialize_remote (void)
add_target (&extended_remote_ops);
/* Hook into new objfile notification. */
observer_attach_new_objfile (remote_new_objfile);
gdb::observers::new_objfile.attach (remote_new_objfile);
/* We're no longer interested in notification events of an inferior
when it exits. */
observer_attach_inferior_exit (discard_pending_stop_replies);
gdb::observers::inferior_exit.attach (discard_pending_stop_replies);
#if 0
init_remote_threadtests ();

6
gdb/riscv-tdep.c
View File

@ -53,7 +53,7 @@
#include "common-defs.h"
#include "opcode/riscv-opc.h"
#include "cli/cli-decode.h"
#include "observer.h"
#include "observable.h"
/* The stack must be 16-byte aligned. */
#define SP_ALIGNMENT 16
@ -2641,8 +2641,8 @@ _initialize_riscv_tdep (void)
= register_inferior_data_with_cleanup (NULL, riscv_inferior_data_cleanup);
/* Observers used to invalidate the inferior data when needed. */
observer_attach_inferior_exit (riscv_invalidate_inferior_data);
observer_attach_inferior_appeared (riscv_invalidate_inferior_data);
gdb::observers::inferior_exit.attach (riscv_invalidate_inferior_data);
gdb::observers::inferior_appeared.attach (riscv_invalidate_inferior_data);
/* Add root prefix command for all "set debug riscv" and "show debug
riscv" commands. */

2
gdb/rs6000-nat.c
View File

@ -33,7 +33,7 @@
#include "rs6000-tdep.h"
#include "rs6000-aix-tdep.h"
#include "exec.h"
#include "observer.h"
#include "observable.h"
#include "xcoffread.h"
#include <sys/ptrace.h>

4
gdb/sol-thread.c
View File

@ -63,7 +63,7 @@
#include "regcache.h"
#include "solib.h"
#include "symfile.h"
#include "observer.h"
#include "observable.h"
#include "procfs.h"
#include "symtab.h"
#include "minsyms.h"
@ -1229,7 +1229,7 @@ _initialize_sol_thread (void)
_("Show info on Solaris user threads."), &maintenanceinfolist);
/* Hook into new_objfile notification. */
observer_attach_new_objfile (sol_thread_new_objfile);
gdb::observers::new_objfile.attach (sol_thread_new_objfile);
return;
die:

4
gdb/solib-aix.c
View File

@ -24,7 +24,7 @@
#include "objfiles.h"
#include "symtab.h"
#include "xcoffread.h"
#include "observer.h"
#include "observable.h"
#include "gdbcmd.h"
/* Variable controlling the output of the debugging traces for
@ -791,7 +791,7 @@ _initialize_solib_aix (void)
solib_aix_inferior_data_handle = register_inferior_data ();
observer_attach_normal_stop (solib_aix_normal_stop_observer);
gdb::observers::normal_stop.attach (solib_aix_normal_stop_observer);
/* Debug this file's internals. */
add_setshow_boolean_cmd ("aix-solib", class_maintenance,

4
gdb/solib-spu.c
View File

@ -30,7 +30,7 @@
#include "solist.h"
#include "inferior.h"
#include "objfiles.h"
#include "observer.h"
#include "observable.h"
#include "breakpoint.h"
#include "gdbthread.h"
#include "gdb_bfd.h"
@ -545,7 +545,7 @@ spu_solib_loaded (struct so_list *so)
void
_initialize_spu_solib (void)
{
observer_attach_solib_loaded (spu_solib_loaded);
gdb::observers::solib_loaded.attach (spu_solib_loaded);
ocl_program_data_key = register_objfile_data ();
}

2
gdb/solib-svr4.c
View File

@ -33,7 +33,7 @@
#include "infrun.h"
#include "regcache.h"
#include "gdbthread.h"
#include "observer.h"
#include "observable.h"
#include "solist.h"
#include "solib.h"

10
gdb/solib.c
View File

@ -38,7 +38,7 @@
#include "filenames.h" /* for DOSish file names */
#include "exec.h"
#include "solist.h"
#include "observer.h"
#include "observable.h"
#include "readline/readline.h"
#include "remote.h"
#include "solib.h"
@ -824,7 +824,7 @@ update_solib_list (int from_tty)
{
/* Notify any observer that the shared object has been
unloaded before we remove it from GDB's tables. */
observer_notify_solib_unloaded (gdb);
gdb::observers::solib_unloaded.notify (gdb);
current_program_space->deleted_solibs.push_back (gdb->so_name);
@ -885,7 +885,7 @@ update_solib_list (int from_tty)
/* Notify any observer that the shared object has been
loaded now that we've added it to GDB's tables. */
observer_notify_solib_loaded (i);
gdb::observers::solib_loaded.notify (i);
}
/* If a library was not found, issue an appropriate warning
@ -1193,7 +1193,7 @@ clear_solib (void)
struct so_list *so = so_list_head;
so_list_head = so->next;
observer_notify_solib_unloaded (so);
gdb::observers::solib_unloaded.notify (so);
remove_target_sections (so);
free_so (so);
}
@ -1595,7 +1595,7 @@ _initialize_solib (void)
{
solib_data = gdbarch_data_register_pre_init (solib_init);
observer_attach_free_objfile (remove_user_added_objfile);
gdb::observers::free_objfile.attach (remove_user_added_objfile);
add_com ("sharedlibrary", class_files, sharedlibrary_command,
_("Load shared object library symbols for files matching REGEXP."));

8
gdb/spu-multiarch.c
View File

@ -22,7 +22,7 @@
#include "gdbcore.h"
#include "gdbcmd.h"
#include "arch-utils.h"
#include "observer.h"
#include "observable.h"
#include "inferior.h"
#include "regcache.h"
#include "symfile.h"
@ -410,8 +410,8 @@ _initialize_spu_multiarch (void)
complete_target_initialization (&spu_ops);
/* Install observers to watch for SPU objects. */
observer_attach_inferior_created (spu_multiarch_inferior_created);
observer_attach_solib_loaded (spu_multiarch_solib_loaded);
observer_attach_solib_unloaded (spu_multiarch_solib_unloaded);
gdb::observers::inferior_created.attach (spu_multiarch_inferior_created);
gdb::observers::solib_loaded.attach (spu_multiarch_solib_loaded);
gdb::observers::solib_unloaded.attach (spu_multiarch_solib_unloaded);
}

8
gdb/spu-tdep.c
View File

@ -39,7 +39,7 @@
#include "regcache.h"
#include "reggroups.h"
#include "block.h"
#include "observer.h"
#include "observable.h"
#include "infcall.h"
#include "dwarf2.h"
#include "dwarf2-frame.h"
@ -2771,14 +2771,14 @@ _initialize_spu_tdep (void)
register_gdbarch_init (bfd_arch_spu, spu_gdbarch_init);
/* Add ourselves to objfile event chain. */
observer_attach_new_objfile (spu_overlay_new_objfile);
gdb::observers::new_objfile.attach (spu_overlay_new_objfile);
spu_overlay_data = register_objfile_data ();
/* Install spu stop-on-load handler. */
observer_attach_new_objfile (spu_catch_start);
gdb::observers::new_objfile.attach (spu_catch_start);
/* Add ourselves to normal_stop event chain. */
observer_attach_normal_stop (spu_attach_normal_stop);
gdb::observers::normal_stop.attach (spu_attach_normal_stop);
/* Add root prefix command for all "set spu"/"show spu" commands. */
add_prefix_cmd ("spu", no_class, set_spu_command,

10
gdb/stack.c
View File

@ -51,7 +51,7 @@
#include "safe-ctype.h"
#include "symfile.h"
#include "extension.h"
#include "observer.h"
#include "observable.h"
#include "common/def-vector.h"
/* The possible choices of "set print frame-arguments", and the value
@ -2277,7 +2277,7 @@ select_frame_command (const char *level_exp, int from_tty)
select_frame (parse_frame_specification (level_exp, NULL));
if (get_selected_frame_if_set () != prev_frame)
observer_notify_user_selected_context_changed (USER_SELECTED_FRAME);
gdb::observers::user_selected_context_changed.notify (USER_SELECTED_FRAME);
}
/* The "frame" command. With no argument, print the selected frame
@ -2291,7 +2291,7 @@ frame_command (const char *level_exp, int from_tty)
select_frame (parse_frame_specification (level_exp, NULL));
if (get_selected_frame_if_set () != prev_frame)
observer_notify_user_selected_context_changed (USER_SELECTED_FRAME);
gdb::observers::user_selected_context_changed.notify (USER_SELECTED_FRAME);
else
print_selected_thread_frame (current_uiout, USER_SELECTED_FRAME);
}
@ -2324,7 +2324,7 @@ static void
up_command (const char *count_exp, int from_tty)
{
up_silently_base (count_exp);
observer_notify_user_selected_context_changed (USER_SELECTED_FRAME);
gdb::observers::user_selected_context_changed.notify (USER_SELECTED_FRAME);
}
/* Select the frame down one or COUNT_EXP stack levels from the previously
@ -2363,7 +2363,7 @@ static void
down_command (const char *count_exp, int from_tty)
{
down_silently_base (count_exp);
observer_notify_user_selected_context_changed (USER_SELECTED_FRAME);
gdb::observers::user_selected_context_changed.notify (USER_SELECTED_FRAME);
}
void

2
gdb/symfile-debug.c
View File

@ -28,7 +28,7 @@
#include "defs.h"
#include "gdbcmd.h"
#include "objfiles.h"
#include "observer.h"
#include "observable.h"
#include "source.h"
#include "symtab.h"
#include "symfile.h"

4
gdb/symfile-mem.c
View File

@ -49,7 +49,7 @@
#include "target.h"
#include "value.h"
#include "symfile.h"
#include "observer.h"
#include "observable.h"
#include "auxv.h"
#include "elf/common.h"
#include "gdb_bfd.h"
@ -219,5 +219,5 @@ _initialize_symfile_mem (void)
/* Want to know of each new inferior so that its vsyscall info can
be extracted. */
observer_attach_inferior_created (add_vsyscall_page);
gdb::observers::inferior_created.attach (add_vsyscall_page);
}

16
gdb/symfile.c
View File

@ -46,7 +46,7 @@
#include "hashtab.h"
#include "readline/readline.h"
#include "block.h"
#include "observer.h"
#include "observable.h"
#include "exec.h"
#include "parser-defs.h"
#include "varobj.h"
@ -1152,13 +1152,13 @@ symbol_file_add_with_addrs (bfd *abfd, const char *name,
if (objfile->sf == NULL)
{
observer_notify_new_objfile (objfile);
gdb::observers::new_objfile.notify (objfile);
return objfile; /* No symbols. */
}
finish_new_objfile (objfile, add_flags);
observer_notify_new_objfile (objfile);
gdb::observers::new_objfile.notify (objfile);
bfd_cache_close_all ();
return (objfile);
@ -2511,14 +2511,14 @@ reread_symbols (void)
clear_symtab_users (0);
/* clear_objfile_data for each objfile was called before freeing it and
observer_notify_new_objfile (NULL) has been called by
gdb::observers::new_objfile.notify (NULL) has been called by
clear_symtab_users above. Notify the new files now. */
for (auto iter : new_objfiles)
observer_notify_new_objfile (iter);
gdb::observers::new_objfile.notify (objfile);
/* At least one objfile has changed, so we can consider that
the executable we're debugging has changed too. */
observer_notify_executable_changed ();
gdb::observers::executable_changed.notify ();
}
}
@ -2755,7 +2755,7 @@ clear_symtab_users (symfile_add_flags add_flags)
clear_displays ();
clear_last_displayed_sal ();
clear_pc_function_cache ();
observer_notify_new_objfile (NULL);
gdb::observers::new_objfile.notify (NULL);
/* Clear globals which might have pointed into a removed objfile.
FIXME: It's not clear which of these are supposed to persist
@ -3761,7 +3761,7 @@ _initialize_symfile (void)
{
struct cmd_list_element *c;
observer_attach_free_objfile (symfile_free_objfile);
gdb::observers::free_objfile.attach (symfile_free_objfile);
#define READNOW_READNEVER_HELP \
"The '-readnow' option will cause GDB to read the entire symbol file\n\

8
gdb/symtab.c
View File

@ -54,7 +54,7 @@
#include <ctype.h>
#include "cp-abi.h"
#include "cp-support.h"
#include "observer.h"
#include "observable.h"
#include "solist.h"
#include "macrotab.h"
#include "macroscope.h"
@ -5917,7 +5917,7 @@ If zero then the symbol cache is disabled."),
_("Flush the symbol cache for each program space."),
&maintenancelist);
observer_attach_executable_changed (symtab_observer_executable_changed);
observer_attach_new_objfile (symtab_new_objfile_observer);
observer_attach_free_objfile (symtab_free_objfile_observer);
gdb::observers::executable_changed.attach (symtab_observer_executable_changed);
gdb::observers::new_objfile.attach (symtab_new_objfile_observer);
gdb::observers::free_objfile.attach (symtab_free_objfile_observer);
}

4
gdb/testsuite/ChangeLog
View File

@ -1,3 +1,7 @@
2018-03-19 Tom Tromey <tom@tromey.com>
* gdb.gdb/observer.exp: Remove.
2018-03-19 Andreas Arnez <arnez@linux.vnet.ibm.com>
* gdb.trace/actions-changed.exp: Call gdb_breakpoint with the

143
gdb/testsuite/gdb.gdb/observer.exp
View File

@ -1,143 +0,0 @@
# Copyright 2003-2018 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# This file was written by Joel Brobecker (brobecker@gnat.com), derived
# from xfullpath.exp.
load_lib selftest-support.exp
proc attach_first_observer { message } {
gdb_test_no_output "set \$first_obs = observer_attach_test_notification (&observer_test_first_notification_function)" \
"$message; attach first observer"
}
proc attach_second_observer { message } {
gdb_test_no_output "set \$second_obs = observer_attach_test_notification (&observer_test_second_notification_function)" \
"$message; attach second observer"
}
proc attach_third_observer { message } {
gdb_test_no_output "set \$third_obs = observer_attach_test_notification (&observer_test_third_notification_function)" \
"$message; attach third observer"
}
proc detach_first_observer { message } {
gdb_test_no_output "call observer_detach_test_notification (\$first_obs)" \
"$message; detach first observer"
}
proc detach_second_observer { message } {
gdb_test_no_output "call observer_detach_test_notification (\$second_obs)" \
"$message; detach second observer"
}
proc detach_third_observer { message } {
gdb_test_no_output "call observer_detach_test_notification (\$third_obs)" \
"$message; detach third observer"
}
proc check_counters { first second third message } {
gdb_test "print observer_test_first_observer" \
".\[0-9\]+ =.*$first" \
"$message; check first observer counter value"
gdb_test "print observer_test_second_observer" \
".\[0-9\]+ =.*$second" \
"$message; check second observer counter value"
gdb_test "print observer_test_third_observer" \
".\[0-9\]+ =.*$third" \
"$message; check third observer counter value"
}
proc reset_counters { message } {
gdb_test_no_output "set variable observer_test_first_observer = 0" \
"$message; reset first observer counter"
gdb_test_no_output "set variable observer_test_second_observer = 0" \
"$message; reset second observer counter"
gdb_test_no_output "set variable observer_test_third_observer = 0" \
"$message; reset third observer counter"
}
proc test_notifications { first second third message args } {
# Do any initialization
for {set i 0} {$i < [llength $args]} {incr i} {
[lindex $args $i] $message
}
reset_counters $message
# Call observer_notify_test_notification. Note that this procedure
# takes one argument, but this argument is ignored by the observer
# callbacks we have installed. So we just pass an arbitrary value.
gdb_test_no_output "call observer_notify_test_notification (0)" \
"$message; sending notification"
check_counters $first $second $third $message
}
proc test_observer {} {
# First, try sending a notification without any observer attached.
test_notifications 0 0 0 "no observer attached"
# Now, attach one observer, and send a notification.
test_notifications 0 1 0 "second observer attached" \
attach_second_observer
# Remove the observer, and send a notification.
test_notifications 0 0 0 "second observer detached" \
detach_second_observer
# With a new observer.
test_notifications 1 0 0 "1st observer added" \
attach_first_observer
# With 2 observers.
test_notifications 1 1 0 "2nd observer added" \
attach_second_observer
# With 3 observers.
test_notifications 1 1 1 "3rd observer added" \
attach_third_observer
# Remove middle observer.
test_notifications 1 0 1 "2nd observer removed" \
detach_second_observer
# Remove first observer.
test_notifications 0 0 1 "1st observer removed" \
detach_first_observer
# Remove last observer.
test_notifications 0 0 0 "3rd observer removed" \
detach_third_observer
# Go back to 3 observers, and remove them in a different order...
test_notifications 1 1 1 "three observers added" \
attach_first_observer \
attach_second_observer \
attach_third_observer
# Remove the third observer.
test_notifications 1 1 0 "third observer removed" \
detach_third_observer
# Remove the second observer.
test_notifications 1 0 0 "second observer removed" \
detach_second_observer
# Remove the first observer, no more observers.
test_notifications 0 0 0 "first observer removed" \
detach_first_observer
return 0
}
do_self_tests captured_main test_observer

20
gdb/thread.c
View File

@ -36,7 +36,7 @@
#include <sys/types.h>
#include <signal.h>
#include "ui-out.h"
#include "observer.h"
#include "observable.h"
#include "annotate.h"
#include "cli/cli-decode.h"
#include "gdb_regex.h"
@ -207,7 +207,7 @@ set_thread_exited (thread_info *tp, int silent)
if (tp->state != THREAD_EXITED)
{
observer_notify_thread_exit (tp, silent);
gdb::observers::thread_exit.notify (tp, silent);
/* Tag it as exited. */
tp->state = THREAD_EXITED;
@ -299,7 +299,7 @@ add_thread_silent (ptid_t ptid)
tp->state = THREAD_STOPPED;
switch_to_thread (ptid);
observer_notify_new_thread (tp);
gdb::observers::new_thread.notify (tp);
/* All done. */
return tp;
@ -310,7 +310,7 @@ add_thread_silent (ptid_t ptid)
}
tp = new_thread (inf, ptid);
observer_notify_new_thread (tp);
gdb::observers::new_thread.notify (tp);
return tp;
}
@ -821,7 +821,7 @@ thread_change_ptid (ptid_t old_ptid, ptid_t new_ptid)
tp = find_thread_ptid (old_ptid);
tp->ptid = new_ptid;
observer_notify_thread_ptid_changed (old_ptid, new_ptid);
gdb::observers::thread_ptid_changed.notify (old_ptid, new_ptid);
}
/* See gdbthread.h. */
@ -901,7 +901,7 @@ set_running (ptid_t ptid, int running)
any_started = 1;
}
if (any_started)
observer_notify_target_resumed (ptid);
gdb::observers::target_resumed.notify (ptid);
}
static int
@ -1000,7 +1000,7 @@ set_stop_requested (ptid_t ptid, int stop)
/* Call the stop requested observer so other components of GDB can
react to this request. */
if (stop)
observer_notify_thread_stop_requested (ptid);
gdb::observers::thread_stop_requested.notify (ptid);
}
void
@ -1037,7 +1037,7 @@ finish_thread_state (ptid_t ptid)
}
if (any_started)
observer_notify_target_resumed (ptid);
gdb::observers::target_resumed.notify (ptid);
}
void
@ -1786,8 +1786,8 @@ thread_command (const char *tidstr, int from_tty)
}
else
{
observer_notify_user_selected_context_changed (USER_SELECTED_THREAD
| USER_SELECTED_FRAME);
gdb::observers::user_selected_context_changed.notify
(USER_SELECTED_THREAD | USER_SELECTED_FRAME);
}
}
}

4
gdb/top.c
View File

@ -46,7 +46,7 @@
#include "gdbthread.h"
#include "extension.h"
#include "interps.h"
#include "observer.h"
#include "observable.h"
#include "maint.h"
#include "filenames.h"
#include "frame.h"
@ -1959,7 +1959,7 @@ static void
set_gdb_datadir (const char *args, int from_tty, struct cmd_list_element *c)
{
set_gdb_data_directory (staged_gdb_datadir);
observer_notify_gdb_datadir_changed ();
gdb::observers::gdb_datadir_changed.notify ();
}
/* "show" command for the gdb_datadir configuration variable. */

18
gdb/tracepoint.c
View File

@ -36,7 +36,7 @@
#include "completer.h"
#include "block.h"
#include "dictionary.h"
#include "observer.h"
#include "observable.h"
#include "user-regs.h"
#include "valprint.h"
#include "gdbcore.h"
@ -315,7 +315,7 @@ delete_trace_state_variable (const char *name)
for (ix = 0; VEC_iterate (tsv_s, tvariables, ix, tsv); ++ix)
if (strcmp (name, tsv->name) == 0)
{
observer_notify_tsv_deleted (tsv);
gdb::observers::tsv_deleted.notify (tsv);
xfree ((void *)tsv->name);
VEC_unordered_remove (tsv_s, tvariables, ix);
@ -390,7 +390,7 @@ trace_variable_command (const char *args, int from_tty)
if (tsv->initial_value != initval)
{
tsv->initial_value = initval;
observer_notify_tsv_modified (tsv);
gdb::observers::tsv_modified.notify (tsv);
}
printf_filtered (_("Trace state variable $%s "
"now has initial value %s.\n"),
@ -402,7 +402,7 @@ trace_variable_command (const char *args, int from_tty)
tsv = create_trace_state_variable (name.c_str ());
tsv->initial_value = initval;
observer_notify_tsv_created (tsv);
gdb::observers::tsv_created.notify (tsv);
printf_filtered (_("Trace state variable $%s "
"created, with initial value %s.\n"),
@ -417,7 +417,7 @@ delete_trace_variable_command (const char *args, int from_tty)
if (query (_("Delete all trace state variables? ")))
VEC_free (tsv_s, tvariables);
dont_repeat ();
observer_notify_tsv_deleted (NULL);
gdb::observers::tsv_deleted.notify (NULL);
return;
}
@ -1659,7 +1659,7 @@ start_tracing (const char *notes)
loc->gdbarch);
if (bp_location_downloaded)
observer_notify_breakpoint_modified (b);
gdb::observers::breakpoint_modified.notify (b);
}
VEC_free (breakpoint_p, tp_vec);
@ -2175,7 +2175,7 @@ tfind_1 (enum trace_find_type type, int num,
set_tracepoint_num (tp ? tp->number : target_tracept);
if (target_frameno != get_traceframe_number ())
observer_notify_traceframe_changed (target_frameno, tracepoint_number);
gdb::observers::traceframe_changed.notify (target_frameno, tracepoint_number);
set_current_traceframe (target_frameno);
@ -3240,7 +3240,7 @@ merge_uploaded_tracepoints (struct uploaded_tp **uploaded_tps)
/* Notify 'breakpoint-modified' observer that at least one of B's
locations was changed. */
for (ix = 0; VEC_iterate (breakpoint_p, modified_tp, ix, b); ix++)
observer_notify_breakpoint_modified (b);
gdb::observers::breakpoint_modified.notify (b);
VEC_free (breakpoint_p, modified_tp);
free_uploaded_tps (uploaded_tps);
@ -3287,7 +3287,7 @@ create_tsv_from_upload (struct uploaded_tsv *utsv)
tsv->initial_value = utsv->initial_value;
tsv->builtin = utsv->builtin;
observer_notify_tsv_created (tsv);
gdb::observers::tsv_created.notify (tsv);
return tsv;
}

79
gdb/tui/tui-hooks.c
View File

@ -32,7 +32,7 @@
#include "breakpoint.h"
#include "ui-out.h"
#include "top.h"
#include "observer.h"
#include "observable.h"
#include <unistd.h>
#include <fcntl.h>
@ -203,14 +203,42 @@ tui_normal_stop (struct bpstats *bs, int print_frame)
tui_refresh_frame_and_register_information (/*registers_too_p=*/1);
}
/* Observers created when installing TUI hooks. */
static struct observer *tui_bp_created_observer;
static struct observer *tui_bp_deleted_observer;
static struct observer *tui_bp_modified_observer;
static struct observer *tui_inferior_exit_observer;
static struct observer *tui_before_prompt_observer;
static struct observer *tui_normal_stop_observer;
static struct observer *tui_register_changed_observer;
/* Token associated with observers registered while TUI hooks are
installed. */
static const gdb::observers::token tui_observers_token;
/* Attach or detach a single observer, according to ATTACH. */
template<typename T>
static void
attach_or_detach (T &observable, typename T::func_type func, bool attach)
{
if (attach)
observable.attach (func, tui_observers_token);
else
observable.detach (tui_observers_token);
}
/* Attach or detach TUI observers, according to ATTACH. */
static void
tui_attach_detach_observers (bool attach)
{
attach_or_detach (gdb::observers::breakpoint_created,
tui_event_create_breakpoint, attach);
attach_or_detach (gdb::observers::breakpoint_deleted,
tui_event_delete_breakpoint, attach);
attach_or_detach (gdb::observers::breakpoint_modified,
tui_event_modify_breakpoint, attach);
attach_or_detach (gdb::observers::inferior_exit,
tui_inferior_exit, attach);
attach_or_detach (gdb::observers::before_prompt,
tui_before_prompt, attach);
attach_or_detach (gdb::observers::normal_stop,
tui_normal_stop, attach);
attach_or_detach (gdb::observers::register_changed,
tui_register_changed, attach);
}
/* Install the TUI specific hooks. */
void
@ -224,20 +252,7 @@ tui_install_hooks (void)
= tui_dummy_print_frame_info_listing_hook;
/* Install the event hooks. */
tui_bp_created_observer
= observer_attach_breakpoint_created (tui_event_create_breakpoint);
tui_bp_deleted_observer
= observer_attach_breakpoint_deleted (tui_event_delete_breakpoint);
tui_bp_modified_observer
= observer_attach_breakpoint_modified (tui_event_modify_breakpoint);
tui_inferior_exit_observer
= observer_attach_inferior_exit (tui_inferior_exit);
tui_before_prompt_observer
= observer_attach_before_prompt (tui_before_prompt);
tui_normal_stop_observer
= observer_attach_normal_stop (tui_normal_stop);
tui_register_changed_observer
= observer_attach_register_changed (tui_register_changed);
tui_attach_detach_observers (true);
}
/* Remove the TUI specific hooks. */
@ -246,26 +261,14 @@ tui_remove_hooks (void)
{
deprecated_print_frame_info_listing_hook = 0;
deprecated_query_hook = 0;
/* Remove our observers. */
observer_detach_breakpoint_created (tui_bp_created_observer);
tui_bp_created_observer = NULL;
observer_detach_breakpoint_deleted (tui_bp_deleted_observer);
tui_bp_deleted_observer = NULL;
observer_detach_breakpoint_modified (tui_bp_modified_observer);
tui_bp_modified_observer = NULL;
observer_detach_inferior_exit (tui_inferior_exit_observer);
tui_inferior_exit_observer = NULL;
observer_detach_before_prompt (tui_before_prompt_observer);
tui_before_prompt_observer = NULL;
observer_detach_normal_stop (tui_normal_stop_observer);
tui_normal_stop_observer = NULL;
observer_detach_register_changed (tui_register_changed_observer);
tui_register_changed_observer = NULL;
tui_attach_detach_observers (false);
}
void
_initialize_tui_hooks (void)
{
/* Install the permanent hooks. */
observer_attach_new_objfile (tui_new_objfile_hook);
gdb::observers::new_objfile.attach (tui_new_objfile_hook);
}

20
gdb/tui/tui-interp.c
View File

@ -31,7 +31,7 @@
#include "tui/tui.h"
#include "tui/tui-io.h"
#include "infrun.h"
#include "observer.h"
#include "observable.h"
#include "gdbthread.h"
/* Set to 1 when the TUI mode must be activated when we first start
@ -326,14 +326,14 @@ _initialize_tui_interp (void)
}
/* If changing this, remember to update cli-interp.c as well. */
observer_attach_normal_stop (tui_on_normal_stop);
observer_attach_signal_received (tui_on_signal_received);
observer_attach_end_stepping_range (tui_on_end_stepping_range);
observer_attach_signal_exited (tui_on_signal_exited);
observer_attach_exited (tui_on_exited);
observer_attach_no_history (tui_on_no_history);
observer_attach_sync_execution_done (tui_on_sync_execution_done);
observer_attach_command_error (tui_on_command_error);
observer_attach_user_selected_context_changed
gdb::observers::normal_stop.attach (tui_on_normal_stop);
gdb::observers::signal_received.attach (tui_on_signal_received);
gdb::observers::end_stepping_range.attach (tui_on_end_stepping_range);
gdb::observers::signal_exited.attach (tui_on_signal_exited);
gdb::observers::exited.attach (tui_on_exited);
gdb::observers::no_history.attach (tui_on_no_history);
gdb::observers::sync_execution_done.attach (tui_on_sync_execution_done);
gdb::observers::command_error.attach (tui_on_command_error);
gdb::observers::user_selected_context_changed.attach
(tui_on_user_selected_context_changed);
}

135
gdb/unittests/observable-selftests.c Normal file
View File

@ -0,0 +1,135 @@
/* Self tests for gdb::observers, GDB notifications to observers.
Copyright (C) 2003-2018 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "selftest.h"
#include "common/observable.h"
namespace selftests {
namespace observers {
gdb::observers::observable<int> test_notification ("test_notification");
static int test_first_observer = 0;
static int test_second_observer = 0;
static int test_third_observer = 0;
static void
test_first_notification_function (int arg)
{
test_first_observer++;
}
static void
test_second_notification_function (int arg)
{
test_second_observer++;
}
static void
test_third_notification_function (int arg)
{
test_third_observer++;
}
static void
notify_check_counters (int one, int two, int three)
{
/* Reset. */
test_first_observer = 0;
test_second_observer = 0;
test_third_observer = 0;
/* Notify. */
test_notification.notify (0);
/* Check. */
SELF_CHECK (one == test_first_observer);
SELF_CHECK (two == test_second_observer);
SELF_CHECK (three == test_third_observer);
}
static void
run_tests ()
{
/* First, try sending a notification without any observer
attached. */
notify_check_counters (0, 0, 0);
const gdb::observers::token token1, token2, token3;
/* Now, attach one observer, and send a notification. */
test_notification.attach (&test_second_notification_function, token2);
notify_check_counters (0, 1, 0);
/* Remove the observer, and send a notification. */
test_notification.detach (token2);
notify_check_counters (0, 0, 0);
/* With a new observer. */
test_notification.attach (&test_first_notification_function, token1);
notify_check_counters (1, 0, 0);
/* With 2 observers. */
test_notification.attach (&test_second_notification_function, token2);
notify_check_counters (1, 1, 0);
/* With 3 observers. */
test_notification.attach (&test_third_notification_function, token3);
notify_check_counters (1, 1, 1);
/* Remove middle observer. */
test_notification.detach (token2);
notify_check_counters (1, 0, 1);
/* Remove first observer. */
test_notification.detach (token1);
notify_check_counters (0, 0, 1);
/* Remove last observer. */
test_notification.detach (token3);
notify_check_counters (0, 0, 0);
/* Go back to 3 observers, and remove them in a different
order... */
test_notification.attach (&test_first_notification_function, token1);
test_notification.attach (&test_second_notification_function, token2);
test_notification.attach (&test_third_notification_function, token3);
notify_check_counters (1, 1, 1);
/* Remove the third observer. */
test_notification.detach (token3);
notify_check_counters (1, 1, 0);
/* Remove the second observer. */
test_notification.detach (token2);
notify_check_counters (1, 0, 0);
/* Remove first observer, no more observers. */
test_notification.detach (token1);
notify_check_counters (0, 0, 0);
}
} /* namespace observers */
} /* namespace selftests */
void
_initialize_observer_selftest ()
{
selftests::register_test ("gdb::observers",
selftests::observers::run_tests);
}

6
gdb/valops.c
View File

@ -36,7 +36,7 @@
#include "cp-support.h"
#include "target-float.h"
#include "tracepoint.h"
#include "observer.h"
#include "observable.h"
#include "objfiles.h"
#include "extension.h"
#include "byte-vector.h"
@ -1177,7 +1177,7 @@ value_assign (struct value *toval, struct value *fromval)
}
}
observer_notify_register_changed (frame, value_reg);
gdb::observers::register_changed.notify (frame, value_reg);
break;
}
@ -1208,7 +1208,7 @@ value_assign (struct value *toval, struct value *fromval)
case lval_register:
case lval_computed:
observer_notify_target_changed (&current_target);
gdb::observers::target_changed.notify (&current_target);
/* Having destroyed the frame cache, restore the selected
frame. */