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2011-06-06 Pedro Alves <pedro@codesourcery.com> 

gdb/
	* infcall.c (run_inferior_call): Don't mask async.  Instead force
	a synchronous wait, if the target can async.

	* target.h (struct target_ops): Delete to_async_mask.
	(target_async_mask): Delete.
	* target.c (update_current_target): Delete references to to_async_mask.
	* linux-nat.c (linux_nat_async_mask_value): Delete.
	(linux_nat_is_async_p, linux_nat_can_async_p): Remove references
	to linux_nat_async_mask_value.
	(linux_nat_async_mask): Delete.
	(linux_nat_async, linux_nat_close): Remove references to
	linux_nat_async_mask_value.
	* record.c (record_async_mask_value): Delete.
	(record_async): Remove references to record_async_mask_value.
	(record_async_mask): Delete.
	(record_can_async_p, record_is_async_p): Remove references to
	record_async_mask_value.
	(init_record_ops, init_record_core_ops): Remove references to
	record_async_mask.
	* remote.c (remote_async_mask_value): Delete.
	(init_remote_ops): Remove reference to remote_async_mask.
	(remote_can_async_p, remote_is_async_p): Remove references to
	remote_async_mask_value.
	(remote_async): Remove references to remote_async_mask_value.
	(remote_async_mask): Delete.

	* infrun.c (fetch_inferior_event): Don't claim registers changed
	if the current thread is already not executing.
This commit is contained in:
Pedro Alves 2011-06-06 12:47:07 +00:00
parent 3c0013bf3b
commit 3dd5b83d5b
8 changed files with 61 additions and 138 deletions
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31
gdb/ChangeLog
View File

@ -1,3 +1,34 @@
2011-06-06 Pedro Alves <pedro@codesourcery.com>
* infcall.c (run_inferior_call): Don't mask async. Instead force
a synchronous wait, if the target can async.
* target.h (struct target_ops): Delete to_async_mask.
(target_async_mask): Delete.
* target.c (update_current_target): Delete references to to_async_mask.
* linux-nat.c (linux_nat_async_mask_value): Delete.
(linux_nat_is_async_p, linux_nat_can_async_p): Remove references
to linux_nat_async_mask_value.
(linux_nat_async_mask): Delete.
(linux_nat_async, linux_nat_close): Remove references to
linux_nat_async_mask_value.
* record.c (record_async_mask_value): Delete.
(record_async): Remove references to record_async_mask_value.
(record_async_mask): Delete.
(record_can_async_p, record_is_async_p): Remove references to
record_async_mask_value.
(init_record_ops, init_record_core_ops): Remove references to
record_async_mask.
* remote.c (remote_async_mask_value): Delete.
(init_remote_ops): Remove reference to remote_async_mask.
(remote_can_async_p, remote_is_async_p): Remove references to
remote_async_mask_value.
(remote_async): Remove references to remote_async_mask_value.
(remote_async_mask): Delete.
* infrun.c (fetch_inferior_event): Don't claim registers changed
if the current thread is already not executing.
2011-06-03 Joel Brobecker <brobecker@adacore.com> (obvious fix)
From Stephen Kitt <steve@sk2.org>

26
gdb/infcall.c
View File

@ -387,10 +387,8 @@ static struct gdb_exception
run_inferior_call (struct thread_info *call_thread, CORE_ADDR real_pc)
{
volatile struct gdb_exception e;
int saved_async = 0;
int saved_in_infcall = call_thread->control.in_infcall;
ptid_t call_thread_ptid = call_thread->ptid;
char *saved_target_shortname = xstrdup (target_shortname);
call_thread->control.in_infcall = 1;
@ -401,22 +399,24 @@ run_inferior_call (struct thread_info *call_thread, CORE_ADDR real_pc)
/* We want stop_registers, please... */
call_thread->control.proceed_to_finish = 1;
if (target_can_async_p ())
saved_async = target_async_mask (0);
TRY_CATCH (e, RETURN_MASK_ALL)
proceed (real_pc, TARGET_SIGNAL_0, 0);
{
proceed (real_pc, TARGET_SIGNAL_0, 0);
/* Inferior function calls are always synchronous, even if the
target supports asynchronous execution. Do here what
`proceed' itself does in sync mode. */
if (target_can_async_p () && is_running (inferior_ptid))
{
wait_for_inferior ();
normal_stop ();
}
}
/* At this point the current thread may have changed. Refresh
CALL_THREAD as it could be invalid if its thread has exited. */
call_thread = find_thread_ptid (call_thread_ptid);
/* Don't restore the async mask if the target has changed,
saved_async is for the original target. */
if (saved_async
&& strcmp (saved_target_shortname, target_shortname) == 0)
target_async_mask (saved_async);
enable_watchpoints_after_interactive_call_stop ();
/* Call breakpoint_auto_delete on the current contents of the bpstat
@ -433,8 +433,6 @@ run_inferior_call (struct thread_info *call_thread, CORE_ADDR real_pc)
if (call_thread != NULL)
call_thread->control.in_infcall = saved_in_infcall;
xfree (saved_target_shortname);
return e;
}

11
gdb/infrun.c
View File

@ -2739,7 +2739,16 @@ fetch_inferior_event (void *client_data)
status mechanism. */
overlay_cache_invalid = 1;
registers_changed ();
/* But don't do it if the current thread is already stopped (hence
this is either a delayed event that will result in
TARGET_WAITKIND_IGNORE, or it's an event for another thread (and
we always clear the register and frame caches when the user
switches threads anyway). If we didn't do this, a spurious
delayed event in all-stop mode would make the user lose the
selected frame. */
if (non_stop || is_executing (inferior_ptid))
registers_changed ();
make_cleanup_restore_integer (&execution_direction);
execution_direction = target_execution_direction ();

60
gdb/linux-nat.c
View File

@ -250,15 +250,11 @@ static int linux_supports_tracesysgood_flag = -1;
static int linux_supports_tracevforkdone_flag = -1;
/* Async mode support. */
/* Zero if the async mode, although enabled, is masked, which means
linux_nat_wait should behave as if async mode was off. */
static int linux_nat_async_mask_value = 1;
/* Stores the current used ptrace() options. */
static int current_ptrace_options = 0;
/* Async mode support. */
/* The read/write ends of the pipe registered as waitable file in the
event loop. */
static int linux_nat_event_pipe[2] = { -1, -1 };
@ -306,7 +302,6 @@ static void linux_nat_async (void (*callback)
(enum inferior_event_type event_type,
void *context),
void *context);
static int linux_nat_async_mask (int mask);
static int kill_lwp (int lwpid, int signo);
static int stop_callback (struct lwp_info *lp, void *data);
@ -5359,11 +5354,7 @@ linux_nat_is_async_p (void)
/* NOTE: palves 2008-03-21: We're only async when the user requests
it explicitly with the "set target-async" command.
Someday, linux will always be async. */
if (!target_async_permitted)
return 0;
/* See target.h/target_async_mask. */
return linux_nat_async_mask_value;
return target_async_permitted;
}
/* target_can_async_p implementation. */
@ -5374,11 +5365,7 @@ linux_nat_can_async_p (void)
/* NOTE: palves 2008-03-21: We're only async when the user requests
it explicitly with the "set target-async" command.
Someday, linux will always be async. */
if (!target_async_permitted)
return 0;
/* See target.h/target_async_mask. */
return linux_nat_async_mask_value;
return target_async_permitted;
}
static int
@ -5398,37 +5385,6 @@ linux_nat_supports_multi_process (void)
return linux_multi_process;
}
/* target_async_mask implementation. */
static int
linux_nat_async_mask (int new_mask)
{
int curr_mask = linux_nat_async_mask_value;
if (curr_mask != new_mask)
{
if (new_mask == 0)
{
linux_nat_async (NULL, 0);
linux_nat_async_mask_value = new_mask;
}
else
{
linux_nat_async_mask_value = new_mask;
/* If we're going out of async-mask in all-stop, then the
inferior is stopped. The next resume will call
target_async. In non-stop, the target event source
should be always registered in the event loop. Do so
now. */
if (non_stop)
linux_nat_async (inferior_event_handler, 0);
}
}
return curr_mask;
}
static int async_terminal_is_ours = 1;
/* target_terminal_inferior implementation. */
@ -5555,10 +5511,6 @@ static void
linux_nat_async (void (*callback) (enum inferior_event_type event_type,
void *context), void *context)
{
if (linux_nat_async_mask_value == 0 || !target_async_permitted)
internal_error (__FILE__, __LINE__,
"Calling target_async when async is masked");
if (callback != NULL)
{
async_client_callback = callback;
@ -5651,9 +5603,6 @@ linux_nat_close (int quitting)
if (target_is_async_p ())
target_async (NULL, 0);
/* Reset the async_masking. */
linux_nat_async_mask_value = 1;
if (linux_ops->to_close)
linux_ops->to_close (quitting);
}
@ -5800,7 +5749,6 @@ linux_nat_add_target (struct target_ops *t)
t->to_is_async_p = linux_nat_is_async_p;
t->to_supports_non_stop = linux_nat_supports_non_stop;
t->to_async = linux_nat_async;
t->to_async_mask = linux_nat_async_mask;
t->to_terminal_inferior = linux_nat_terminal_inferior;
t->to_terminal_ours = linux_nat_terminal_ours;
t->to_close = linux_nat_close;

27
gdb/record.c
View File

@ -1817,16 +1817,10 @@ record_goto_bookmark (gdb_byte *bookmark, int from_tty)
return;
}
static int record_async_mask_value = 1;
static void
record_async (void (*callback) (enum inferior_event_type event_type,
void *context), void *context)
{
if (record_async_mask_value == 0)
internal_error (__FILE__, __LINE__,
_("Calling record_async when async is masked"));
/* If we're on top of a line target (e.g., linux-nat, remote), then
set it to async mode as well. Will be NULL if we're sitting on
top of the core target, for "record restore". */
@ -1834,33 +1828,18 @@ record_async (void (*callback) (enum inferior_event_type event_type,
record_beneath_to_async (callback, context);
}
static int
record_async_mask (int new_mask)
{
int curr_mask = record_async_mask_value;
record_async_mask_value = new_mask;
return curr_mask;
}
static int
record_can_async_p (void)
{
/* We only enable async when the user specifically asks for it. */
if (!target_async_permitted)
return 0;
return record_async_mask_value;
return target_async_permitted;
}
static int
record_is_async_p (void)
{
/* We only enable async when the user specifically asks for it. */
if (!target_async_permitted)
return 0;
return record_async_mask_value;
return target_async_permitted;
}
static enum exec_direction_kind
@ -1899,7 +1878,6 @@ init_record_ops (void)
record_ops.to_async = record_async;
record_ops.to_can_async_p = record_can_async_p;
record_ops.to_is_async_p = record_is_async_p;
record_ops.to_async_mask = record_async_mask;
record_ops.to_execution_direction = record_execution_direction;
record_ops.to_magic = OPS_MAGIC;
}
@ -2125,7 +2103,6 @@ init_record_core_ops (void)
record_core_ops.to_async = record_async;
record_core_ops.to_can_async_p = record_can_async_p;
record_core_ops.to_is_async_p = record_is_async_p;
record_core_ops.to_async_mask = record_async_mask;
record_core_ops.to_execution_direction = record_execution_direction;
record_core_ops.to_magic = OPS_MAGIC;
}

22
gdb/remote.c
View File

@ -134,8 +134,6 @@ static int remote_is_async_p (void);
static void remote_async (void (*callback) (enum inferior_event_type event_type,
void *context), void *context);
static int remote_async_mask (int new_mask);
static void remote_detach (struct target_ops *ops, char *args, int from_tty);
static void remote_interrupt (int signo);
@ -721,8 +719,6 @@ static struct target_ops remote_ops;
static struct target_ops extended_remote_ops;
static int remote_async_mask_value = 1;
/* FIXME: cagney/1999-09-23: Even though getpkt was called with
``forever'' still use the normal timeout mechanism. This is
currently used by the ASYNC code to guarentee that target reads
@ -10359,7 +10355,6 @@ Specify the serial device it is connected to\n\
remote_ops.to_can_async_p = remote_can_async_p;
remote_ops.to_is_async_p = remote_is_async_p;
remote_ops.to_async = remote_async;
remote_ops.to_async_mask = remote_async_mask;
remote_ops.to_terminal_inferior = remote_terminal_inferior;
remote_ops.to_terminal_ours = remote_terminal_ours;
remote_ops.to_supports_non_stop = remote_supports_non_stop;
@ -10426,7 +10421,7 @@ remote_can_async_p (void)
return 0;
/* We're async whenever the serial device is. */
return remote_async_mask_value && serial_can_async_p (remote_desc);
return serial_can_async_p (remote_desc);
}
static int
@ -10437,7 +10432,7 @@ remote_is_async_p (void)
return 0;
/* We're async whenever the serial device is. */
return remote_async_mask_value && serial_is_async_p (remote_desc);
return serial_is_async_p (remote_desc);
}
/* Pass the SERIAL event on and up to the client. One day this code
@ -10473,10 +10468,6 @@ static void
remote_async (void (*callback) (enum inferior_event_type event_type,
void *context), void *context)
{
if (remote_async_mask_value == 0)
internal_error (__FILE__, __LINE__,
_("Calling remote_async when async is masked"));
if (callback != NULL)
{
serial_async (remote_desc, remote_async_serial_handler, NULL);
@ -10487,15 +10478,6 @@ remote_async (void (*callback) (enum inferior_event_type event_type,
serial_async (remote_desc, NULL, NULL);
}
static int
remote_async_mask (int new_mask)
{
int curr_mask = remote_async_mask_value;
remote_async_mask_value = new_mask;
return curr_mask;
}
static void
set_remote_cmd (char *args, int from_tty)
{

4
gdb/target.c
View File

@ -659,7 +659,6 @@ update_current_target (void)
INHERIT (to_can_async_p, t);
INHERIT (to_is_async_p, t);
INHERIT (to_async, t);
INHERIT (to_async_mask, t);
INHERIT (to_find_memory_regions, t);
INHERIT (to_make_corefile_notes, t);
INHERIT (to_get_bookmark, t);
@ -829,9 +828,6 @@ update_current_target (void)
de_fault (to_async,
(void (*) (void (*) (enum inferior_event_type, void*), void*))
tcomplain);
de_fault (to_async_mask,
(int (*) (int))
return_one);
de_fault (to_thread_architecture,
default_thread_architecture);
current_target.to_read_description = NULL;

18
gdb/target.h
View File

@ -524,7 +524,6 @@ struct target_ops
int (*to_can_async_p) (void);
int (*to_is_async_p) (void);
void (*to_async) (void (*) (enum inferior_event_type, void *), void *);
int (*to_async_mask) (int);
int (*to_supports_non_stop) (void);
/* find_memory_regions support method for gcore */
int (*to_find_memory_regions) (find_memory_region_ftype func, void *data);
@ -1255,23 +1254,6 @@ int target_supports_non_stop (void);
#define target_async(CALLBACK,CONTEXT) \
(current_target.to_async ((CALLBACK), (CONTEXT)))
/* This is to be used ONLY within call_function_by_hand(). It provides
a workaround, to have inferior function calls done in sychronous
mode, even though the target is asynchronous. After
target_async_mask(0) is called, calls to target_can_async_p() will
return FALSE , so that target_resume() will not try to start the
target asynchronously. After the inferior stops, we IMMEDIATELY
restore the previous nature of the target, by calling
target_async_mask(1). After that, target_can_async_p() will return
TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED.
FIXME ezannoni 1999-12-13: we won't need this once we move
the turning async on and off to the single execution commands,
from where it is done currently, in remote_resume(). */
#define target_async_mask(MASK) \
(current_target.to_async_mask (MASK))
#define target_execution_direction() \
(current_target.to_execution_direction ())