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Convert observers to C++

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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
Download Patch File Download Diff File Expand all files Collapse all files

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))
{