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* target.h (struct target_ops): Remove to_notice_signals;

Browse Source 
add to_pass_signals.
	(target_notice_signals): Remove.
	(target_pass_signals): Add prototype.
	* target.c (update_current_target): Remove to_notice_signals;
	mention to_pass_signals.
	(target_pass_signals): New function.
	(debug_to_notice_signals): Remove.
	(setup_target_debug): Do not install debug_to_notice_signals.

	* infrun.c (signal_pass): New global.
	(resume): Call target_pass_signals.
	(handle_inferior_event): Report all signals while stepping over
	non-steppable watchpoint.  Reset trap_expected to ensure breakpoints
	are re-inserted when stepping over a signal handler.
	(signal_cache_update): New function.
	(signal_stop_update): Call it.
	(signal_print_update): Likewise.
	(signal_pass_update): Likewise.
	(handle_command): Call signal_cache_update and target_pass_signals
	instead of target_notice_signals.
	(_initialize_infrun): Initialize signal_pass.

	* linux-nat.c (pass_mask): New global.
	(linux_nat_pass_signals): New function.
	(linux_nat_create_inferior): Report all signals initially.
	(linux_nat_attach): Likewise.
	(linux_nat_resume): Use pass_mask to decide whether to directly
	handle an inferior signal.
	(linux_nat_wait_1): Likewise.
	(linux_nat_add_target): Install to_pass_signals callback.

	* nto-procfs.c (notice_signals): Remove.
	(procfs_resume): Do not call notice_signals.
	(procfs_notice_signals): Remove.
	(procfs_pass_signals): New function.
	(init_procfs_ops): Install to_pass_signals callback instead of
	to_notice_signals callback.
	(_initialize_procfs): Report all signals initially.

	* procfs.c (procfs_notice_signals): Remove.
	(procfs_pass_signals): New function.
	(procfs_target): Install to_pass_signals callback instead of
	to_notice_signals callback.
	(register_gdb_signals): Remove.
	(procfs_debug_inferior): Report all signals initially.
	(procfs_init_inferior): Remove redundant register_gdb_signals call.

	* remote.c (remote_pass_signals): Add numsigs and pass_signals
	parameters; use them instead of calling signal_..._state routines.
	(remote_notice_signals): Remove.
	(remote_start_remote): Report all signals initially.
	(remote_resume): Do not call remote_pass_signals.
	(_initialize_remote): Install to_pass_signals callback instead of
	to_notice_signals callback.
This commit is contained in:
Ulrich Weigand 2011-04-27 13:29:15 +00:00
parent 46c6471b0a
commit 2455069d93
8 changed files with 230 additions and 137 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

58
gdb/ChangeLog
View File

@ -1,3 +1,61 @@
2011-04-27 Ulrich Weigand <ulrich.weigand@linaro.org>
* target.h (struct target_ops): Remove to_notice_signals;
add to_pass_signals.
(target_notice_signals): Remove.
(target_pass_signals): Add prototype.
* target.c (update_current_target): Remove to_notice_signals;
mention to_pass_signals.
(target_pass_signals): New function.
(debug_to_notice_signals): Remove.
(setup_target_debug): Do not install debug_to_notice_signals.
* infrun.c (signal_pass): New global.
(resume): Call target_pass_signals.
(handle_inferior_event): Report all signals while stepping over
non-steppable watchpoint. Reset trap_expected to ensure breakpoints
are re-inserted when stepping over a signal handler.
(signal_cache_update): New function.
(signal_stop_update): Call it.
(signal_print_update): Likewise.
(signal_pass_update): Likewise.
(handle_command): Call signal_cache_update and target_pass_signals
instead of target_notice_signals.
(_initialize_infrun): Initialize signal_pass.
* linux-nat.c (pass_mask): New global.
(linux_nat_pass_signals): New function.
(linux_nat_create_inferior): Report all signals initially.
(linux_nat_attach): Likewise.
(linux_nat_resume): Use pass_mask to decide whether to directly
handle an inferior signal.
(linux_nat_wait_1): Likewise.
(linux_nat_add_target): Install to_pass_signals callback.
* nto-procfs.c (notice_signals): Remove.
(procfs_resume): Do not call notice_signals.
(procfs_notice_signals): Remove.
(procfs_pass_signals): New function.
(init_procfs_ops): Install to_pass_signals callback instead of
to_notice_signals callback.
(_initialize_procfs): Report all signals initially.
* procfs.c (procfs_notice_signals): Remove.
(procfs_pass_signals): New function.
(procfs_target): Install to_pass_signals callback instead of
to_notice_signals callback.
(register_gdb_signals): Remove.
(procfs_debug_inferior): Report all signals initially.
(procfs_init_inferior): Remove redundant register_gdb_signals call.
* remote.c (remote_pass_signals): Add numsigs and pass_signals
parameters; use them instead of calling signal_..._state routines.
(remote_notice_signals): Remove.
(remote_start_remote): Report all signals initially.
(remote_resume): Do not call remote_pass_signals.
(_initialize_remote): Install to_pass_signals callback instead of
to_notice_signals callback.
2011-04-27 Pedro Alves <pedro@codesourcery.com>
* breakpoint.c (user_settable_breakpoint): Delete.

55
gdb/infrun.c
View File

@ -276,6 +276,11 @@ static unsigned char *signal_stop;
static unsigned char *signal_print;
static unsigned char *signal_program;
/* Table of signals that the target may silently handle.
This is automatically determined from the flags above,
and simply cached here. */
static unsigned char *signal_pass;
#define SET_SIGS(nsigs,sigs,flags) \
do { \
int signum = (nsigs); \
@ -1787,6 +1792,18 @@ a command like `return' or `jump' to continue execution."));
happens to apply to another thread. */
tp->suspend.stop_signal = TARGET_SIGNAL_0;
/* Advise target which signals may be handled silently. If we have
removed breakpoints because we are stepping over one (which can
happen only if we are not using displaced stepping), we need to
receive all signals to avoid accidentally skipping a breakpoint
during execution of a signal handler. */
if ((step || singlestep_breakpoints_inserted_p)
&& tp->control.trap_expected
&& !use_displaced_stepping (gdbarch))
target_pass_signals (0, NULL);
else
target_pass_signals ((int) TARGET_SIGNAL_LAST, signal_pass);
target_resume (resume_ptid, step, sig);
}
@ -3818,7 +3835,12 @@ handle_inferior_event (struct execution_control_state *ecs)
int hw_step = 1;
if (!target_have_steppable_watchpoint)
remove_breakpoints ();
{
remove_breakpoints ();
/* See comment in resume why we need to stop bypassing signals
while breakpoints have been removed. */
target_pass_signals (0, NULL);
}
/* Single step */
hw_step = maybe_software_singlestep (gdbarch, stop_pc);
target_resume (ecs->ptid, hw_step, TARGET_SIGNAL_0);
@ -4090,6 +4112,8 @@ process_event_stop_test:
insert_step_resume_breakpoint_at_frame (frame);
ecs->event_thread->step_after_step_resume_breakpoint = 1;
/* Reset trap_expected to ensure breakpoints are re-inserted. */
ecs->event_thread->control.trap_expected = 0;
keep_going (ecs);
return;
}
@ -4117,6 +4141,8 @@ process_event_stop_test:
"single-step range\n");
insert_step_resume_breakpoint_at_frame (frame);
/* Reset trap_expected to ensure breakpoints are re-inserted. */
ecs->event_thread->control.trap_expected = 0;
keep_going (ecs);
return;
}
@ -5853,12 +5879,29 @@ signal_pass_state (int signo)
return signal_program[signo];
}
static void
signal_cache_update (int signo)
{
if (signo == -1)
{
for (signo = 0; signo < (int) TARGET_SIGNAL_LAST; signo++)
signal_cache_update (signo);
return;
}
signal_pass[signo] = (signal_stop[signo] == 0
&& signal_print[signo] == 0
&& signal_program[signo] == 1);
}
int
signal_stop_update (int signo, int state)
{
int ret = signal_stop[signo];
signal_stop[signo] = state;
signal_cache_update (signo);
return ret;
}
@ -5868,6 +5911,7 @@ signal_print_update (int signo, int state)
int ret = signal_print[signo];
signal_print[signo] = state;
signal_cache_update (signo);
return ret;
}
@ -5877,6 +5921,7 @@ signal_pass_update (int signo, int state)
int ret = signal_program[signo];
signal_program[signo] = state;
signal_cache_update (signo);
return ret;
}
@ -6068,7 +6113,8 @@ Are you sure you want to change it? "),
for (signum = 0; signum < nsigs; signum++)
if (sigs[signum])
{
target_notice_signals (inferior_ptid);
signal_cache_update (-1);
target_pass_signals ((int) TARGET_SIGNAL_LAST, signal_pass);
if (from_tty)
{
@ -6920,6 +6966,8 @@ leave it stopped or free to run as needed."),
xmalloc (sizeof (signal_print[0]) * numsigs);
signal_program = (unsigned char *)
xmalloc (sizeof (signal_program[0]) * numsigs);
signal_pass = (unsigned char *)
xmalloc (sizeof (signal_program[0]) * numsigs);
for (i = 0; i < numsigs; i++)
{
signal_stop[i] = 1;
@ -6963,6 +7011,9 @@ leave it stopped or free to run as needed."),
signal_stop[TARGET_SIGNAL_CANCEL] = 0;
signal_print[TARGET_SIGNAL_CANCEL] = 0;
/* Update cached state. */
signal_cache_update (-1);
add_setshow_zinteger_cmd ("stop-on-solib-events", class_support,
&stop_on_solib_events, _("\
Set stopping for shared library events."), _("\

60
gdb/linux-nat.c
View File

@ -1041,6 +1041,26 @@ restore_child_signals_mask (sigset_t *prev_mask)
{
sigprocmask (SIG_SETMASK, prev_mask, NULL);
}
/* Mask of signals to pass directly to the inferior. */
static sigset_t pass_mask;
/* Update signals to pass to the inferior. */
static void
linux_nat_pass_signals (int numsigs, unsigned char *pass_signals)
{
int signo;
sigemptyset (&pass_mask);
for (signo = 1; signo < NSIG; signo++)
{
int target_signo = target_signal_from_host (signo);
if (target_signo < numsigs && pass_signals[target_signo])
sigaddset (&pass_mask, signo);
}
}
/* Prototypes for local functions. */
@ -1506,6 +1526,9 @@ linux_nat_create_inferior (struct target_ops *ops,
}
#endif /* HAVE_PERSONALITY */
/* Make sure we report all signals during startup. */
linux_nat_pass_signals (0, NULL);
linux_ops->to_create_inferior (ops, exec_file, allargs, env, from_tty);
#ifdef HAVE_PERSONALITY
@ -1527,6 +1550,9 @@ linux_nat_attach (struct target_ops *ops, char *args, int from_tty)
int status;
ptid_t ptid;
/* Make sure we report all signals during attach. */
linux_nat_pass_signals (0, NULL);
linux_ops->to_attach (ops, args, from_tty);
/* The ptrace base target adds the main thread with (pid,0,0)
@ -1885,19 +1911,9 @@ linux_nat_resume (struct target_ops *ops,
if (lp->status && WIFSTOPPED (lp->status))
{
enum target_signal saved_signo;
struct inferior *inf;
inf = find_inferior_pid (ptid_get_pid (lp->ptid));
gdb_assert (inf);
saved_signo = target_signal_from_host (WSTOPSIG (lp->status));
/* Defer to common code if we're gaining control of the
inferior. */
if (inf->control.stop_soon == NO_STOP_QUIETLY
&& signal_stop_state (saved_signo) == 0
&& signal_print_state (saved_signo) == 0
&& signal_pass_state (saved_signo) == 1)
if (!lp->step
&& WSTOPSIG (lp->status)
&& sigismember (&pass_mask, WSTOPSIG (lp->status)))
{
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
@ -1907,7 +1923,7 @@ linux_nat_resume (struct target_ops *ops,
/* FIXME: What should we do if we are supposed to continue
this thread with a signal? */
gdb_assert (signo == TARGET_SIGNAL_0);
signo = saved_signo;
signo = target_signal_from_host (WSTOPSIG (lp->status));
lp->status = 0;
}
}
@ -3553,20 +3569,11 @@ retry:
if (WIFSTOPPED (status))
{
enum target_signal signo = target_signal_from_host (WSTOPSIG (status));
struct inferior *inf;
inf = find_inferior_pid (ptid_get_pid (lp->ptid));
gdb_assert (inf);
/* Defer to common code if we get a signal while
single-stepping, since that may need special care, e.g. to
skip the signal handler, or, if we're gaining control of the
inferior. */
/* When using hardware single-step, we need to report every signal.
Otherwise, signals in pass_mask may be short-circuited. */
if (!lp->step
&& inf->control.stop_soon == NO_STOP_QUIETLY
&& signal_stop_state (signo) == 0
&& signal_print_state (signo) == 0
&& signal_pass_state (signo) == 1)
&& WSTOPSIG (status) && sigismember (&pass_mask, WSTOPSIG (status)))
{
/* FIMXE: kettenis/2001-06-06: Should we resume all threads
here? It is not clear we should. GDB may not expect
@ -5675,6 +5682,7 @@ linux_nat_add_target (struct target_ops *t)
t->to_detach = linux_nat_detach;
t->to_resume = linux_nat_resume;
t->to_wait = linux_nat_wait;
t->to_pass_signals = linux_nat_pass_signals;
t->to_xfer_partial = linux_nat_xfer_partial;
t->to_kill = linux_nat_kill;
t->to_mourn_inferior = linux_nat_mourn_inferior;

37
gdb/nto-procfs.c
View File

@ -64,8 +64,6 @@ static int procfs_xfer_memory (CORE_ADDR, gdb_byte *, int, int,
struct mem_attrib *attrib,
struct target_ops *);
static void notice_signals (void);
static void init_procfs_ops (void);
static ptid_t do_attach (ptid_t ptid);
@ -985,8 +983,6 @@ procfs_resume (struct target_ops *ops,
run.flags |= _DEBUG_RUN_ARM;
sigemptyset (&run.trace);
notice_signals ();
signal_to_pass = target_signal_to_host (signo);
if (signal_to_pass)
@ -1334,34 +1330,23 @@ procfs_store_registers (struct target_ops *ops,
}
}
/* Set list of signals to be handled in the target. */
static void
notice_signals (void)
procfs_pass_signals (int numsigs, unsigned char *pass_signals)
{
int signo;
sigfillset (&run.trace);
for (signo = 1; signo < NSIG; signo++)
{
if (signal_stop_state (target_signal_from_host (signo)) == 0
&& signal_print_state (target_signal_from_host (signo)) == 0
&& signal_pass_state (target_signal_from_host (signo)) == 1)
sigdelset (&run.trace, signo);
else
sigaddset (&run.trace, signo);
int target_signo = target_signal_from_host (signo);
if (target_signo < numsigs && pass_signals[target_signo])
sigdelset (&run.trace, signo);
}
}
/* When the user changes the state of gdb's signal handling via the
"handle" command, this function gets called to see if any change
in the /proc interface is required. It is also called internally
by other /proc interface functions to initialize the state of
the traced signal set. */
static void
procfs_notice_signals (ptid_t ptid)
{
sigemptyset (&run.trace);
notice_signals ();
}
static struct tidinfo *
procfs_thread_info (pid_t pid, short tid)
{
@ -1426,7 +1411,7 @@ init_procfs_ops (void)
procfs_ops.to_create_inferior = procfs_create_inferior;
procfs_ops.to_mourn_inferior = procfs_mourn_inferior;
procfs_ops.to_can_run = procfs_can_run;
procfs_ops.to_notice_signals = procfs_notice_signals;
procfs_ops.to_pass_signals = procfs_pass_signals;
procfs_ops.to_thread_alive = procfs_thread_alive;
procfs_ops.to_find_new_threads = procfs_find_new_threads;
procfs_ops.to_pid_to_str = procfs_pid_to_str;
@ -1458,8 +1443,8 @@ _initialize_procfs (void)
sigaddset (&set, SIGUSR1);
sigprocmask (SIG_BLOCK, &set, NULL);
/* Set up trace and fault sets, as gdb expects them. */
sigemptyset (&run.trace);
/* Initially, make sure all signals are reported. */
sigfillset (&run.trace);
/* Stuff some information. */
nto_cpuinfo_flags = SYSPAGE_ENTRY (cpuinfo)->flags;

58
gdb/procfs.c
View File

@ -120,7 +120,7 @@ static void procfs_fetch_registers (struct target_ops *,
struct regcache *, int);
static void procfs_store_registers (struct target_ops *,
struct regcache *, int);
static void procfs_notice_signals (ptid_t);
static void procfs_pass_signals (ptid_t, int, unsigned char *);
static void procfs_kill_inferior (struct target_ops *ops);
static void procfs_mourn_inferior (struct target_ops *ops);
static void procfs_create_inferior (struct target_ops *, char *,
@ -201,7 +201,7 @@ procfs_target (void)
t->to_store_registers = procfs_store_registers;
t->to_xfer_partial = procfs_xfer_partial;
t->deprecated_xfer_memory = procfs_xfer_memory;
t->to_notice_signals = procfs_notice_signals;
t->to_pass_signals = procfs_pass_signals;
t->to_files_info = procfs_files_info;
t->to_stop = procfs_stop;
@ -3147,7 +3147,6 @@ proc_iterate_over_threads (procinfo *pi,
static ptid_t do_attach (ptid_t ptid);
static void do_detach (int signo);
static int register_gdb_signals (procinfo *, gdb_sigset_t *);
static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum,
int entry_or_exit, int mode, int from_tty);
@ -3186,9 +3185,9 @@ procfs_debug_inferior (procinfo *pi)
if (!proc_set_traced_faults (pi, &traced_faults))
return __LINE__;
/* Register to trace selected signals in the child. */
premptyset (&traced_signals);
if (!register_gdb_signals (pi, &traced_signals))
/* Initially, register to trace all signals in the child. */
prfillset (&traced_signals);
if (!proc_set_traced_signals (pi, &traced_signals))
return __LINE__;
@ -4464,40 +4463,26 @@ procfs_resume (struct target_ops *ops,
}
}
/* Traverse the list of signals that GDB knows about (see "handle"
command), and arrange for the target to be stopped or not,
according to these settings. Returns non-zero for success, zero
for failure. */
static int
register_gdb_signals (procinfo *pi, gdb_sigset_t *signals)
{
int signo;
for (signo = 0; signo < NSIG; signo ++)
if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
signal_print_state (target_signal_from_host (signo)) == 0 &&
signal_pass_state (target_signal_from_host (signo)) == 1)
gdb_prdelset (signals, signo);
else
gdb_praddset (signals, signo);
return proc_set_traced_signals (pi, signals);
}
/* Set up to trace signals in the child process. */
static void
procfs_notice_signals (ptid_t ptid)
procfs_pass_signals (int numsigs, unsigned char *pass_signals)
{
gdb_sigset_t signals;
procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0);
procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
int signo;
if (proc_get_traced_signals (pi, &signals) &&
register_gdb_signals (pi, &signals))
return;
else
proc_error (pi, "notice_signals", __LINE__);
prfillset (&signals);
for (signo = 0; signo < NSIG; signo++)
{
int target_signo = target_signal_from_host (signo);
if (target_signo < numsigs && pass_signals[target_signo])
gdb_prdelset (&signals, signo);
}
if (!proc_set_traced_signals (pi, &signals))
proc_error (pi, "pass_signals", __LINE__);
}
/* Print status information about the child process. */
@ -4679,11 +4664,6 @@ procfs_init_inferior (struct target_ops *ops, int pid)
if (!proc_get_traced_sysexit (pi, pi->saved_exitset))
proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__);
/* Register to trace selected signals in the child. */
prfillset (&signals);
if (!register_gdb_signals (pi, &signals))
proc_error (pi, "init_inferior, register_signals", __LINE__);
if ((fail = procfs_debug_inferior (pi)) != 0)
proc_error (pi, "init_inferior (procfs_debug_inferior)", fail);

30
gdb/remote.c
View File

@ -1596,20 +1596,17 @@ static char *last_pass_packet;
it can simply pass through to the inferior without reporting. */
static void
remote_pass_signals (void)
remote_pass_signals (int numsigs, unsigned char *pass_signals)
{
if (remote_protocol_packets[PACKET_QPassSignals].support != PACKET_DISABLE)
{
char *pass_packet, *p;
int numsigs = (int) TARGET_SIGNAL_LAST;
int count = 0, i;
gdb_assert (numsigs < 256);
for (i = 0; i < numsigs; i++)
{
if (signal_stop_state (i) == 0
&& signal_print_state (i) == 0
&& signal_pass_state (i) == 1)
if (pass_signals[i])
count++;
}
pass_packet = xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
@ -1617,9 +1614,7 @@ remote_pass_signals (void)
p = pass_packet + strlen (pass_packet);
for (i = 0; i < numsigs; i++)
{
if (signal_stop_state (i) == 0
&& signal_print_state (i) == 0
&& signal_pass_state (i) == 1)
if (pass_signals[i])
{
if (i >= 16)
*p++ = tohex (i >> 4);
@ -1649,14 +1644,6 @@ remote_pass_signals (void)
}
}
static void
remote_notice_signals (ptid_t ptid)
{
/* Update the remote on signals to silently pass, if they've
changed. */
remote_pass_signals ();
}
/* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
MINUS_ONE_PTID, set the thread to -1, so the stub returns the
thread. If GEN is set, set the general thread, if not, then set
@ -3378,10 +3365,8 @@ remote_start_remote (int from_tty, struct target_ops *target, int extended_p)
the stop reply queue. */
gdb_assert (wait_status == NULL);
/* Update the remote on signals to silently pass, or more
importantly, which to not ignore, in case a previous session
had set some different set of signals to be ignored. */
remote_pass_signals ();
/* Report all signals during attach/startup. */
remote_pass_signals (0, NULL);
}
/* If we connected to a live target, do some additional setup. */
@ -4549,9 +4534,6 @@ remote_resume (struct target_ops *ops,
last_sent_signal = siggnal;
last_sent_step = step;
/* Update the inferior on signals to silently pass, if they've changed. */
remote_pass_signals ();
/* The vCont packet doesn't need to specify threads via Hc. */
/* No reverse support (yet) for vCont. */
if (execution_direction != EXEC_REVERSE)
@ -10293,7 +10275,7 @@ Specify the serial device it is connected to\n\
remote_ops.to_kill = remote_kill;
remote_ops.to_load = generic_load;
remote_ops.to_mourn_inferior = remote_mourn;
remote_ops.to_notice_signals = remote_notice_signals;
remote_ops.to_pass_signals = remote_pass_signals;
remote_ops.to_thread_alive = remote_thread_alive;
remote_ops.to_find_new_threads = remote_threads_info;
remote_ops.to_pid_to_str = remote_pid_to_str;

48
gdb/target.c
View File

@ -149,8 +149,6 @@ static void debug_to_load (char *, int);
static int debug_to_can_run (void);
static void debug_to_notice_signals (ptid_t);
static void debug_to_stop (ptid_t);
/* Pointer to array of target architecture structures; the size of the
@ -625,7 +623,7 @@ update_current_target (void)
INHERIT (to_has_exited, t);
/* Do not inherit to_mourn_inferior. */
INHERIT (to_can_run, t);
INHERIT (to_notice_signals, t);
/* Do not inherit to_pass_signals. */
/* Do not inherit to_thread_alive. */
/* Do not inherit to_find_new_threads. */
/* Do not inherit to_pid_to_str. */
@ -793,9 +791,6 @@ update_current_target (void)
return_zero);
de_fault (to_can_run,
return_zero);
de_fault (to_notice_signals,
(void (*) (ptid_t))
target_ignore);
de_fault (to_extra_thread_info,
(char *(*) (struct thread_info *))
return_zero);
@ -2587,6 +2582,37 @@ target_resume (ptid_t ptid, int step, enum target_signal signal)
noprocess ();
}
void
target_pass_signals (int numsigs, unsigned char *pass_signals)
{
struct target_ops *t;
for (t = current_target.beneath; t != NULL; t = t->beneath)
{
if (t->to_pass_signals != NULL)
{
if (targetdebug)
{
int i;
fprintf_unfiltered (gdb_stdlog, "target_pass_signals (%d, {",
numsigs);
for (i = 0; i < numsigs; i++)
if (pass_signals[i])
fprintf_unfiltered (gdb_stdlog, " %s",
target_signal_to_name (i));
fprintf_unfiltered (gdb_stdlog, " })\n");
}
(*t->to_pass_signals) (numsigs, pass_signals);
return;
}
}
}
/* Look through the list of possible targets for a target that can
follow forks. */
@ -3914,15 +3940,6 @@ debug_to_can_run (void)
return retval;
}
static void
debug_to_notice_signals (ptid_t ptid)
{
debug_target.to_notice_signals (ptid);
fprintf_unfiltered (gdb_stdlog, "target_notice_signals (%d)\n",
PIDGET (ptid));
}
static struct gdbarch *
debug_to_thread_architecture (struct target_ops *ops, ptid_t ptid)
{
@ -4010,7 +4027,6 @@ setup_target_debug (void)
current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint;
current_target.to_has_exited = debug_to_has_exited;
current_target.to_can_run = debug_to_can_run;
current_target.to_notice_signals = debug_to_notice_signals;
current_target.to_stop = debug_to_stop;
current_target.to_rcmd = debug_to_rcmd;
current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file;

21
gdb/target.h
View File

@ -494,7 +494,11 @@ struct target_ops
int (*to_has_exited) (int, int, int *);
void (*to_mourn_inferior) (struct target_ops *);
int (*to_can_run) (void);
void (*to_notice_signals) (ptid_t ptid);
/* Documentation of this routine is provided with the corresponding
target_* macro. */
void (*to_pass_signals) (int, unsigned char *);
int (*to_thread_alive) (struct target_ops *, ptid_t ptid);
void (*to_find_new_threads) (struct target_ops *);
char *(*to_pid_to_str) (struct target_ops *, ptid_t);
@ -1120,10 +1124,19 @@ void target_mourn_inferior (void);
#define target_can_run(t) \
((t)->to_can_run) ()
/* post process changes to signal handling in the inferior. */
/* Set list of signals to be handled in the target.
#define target_notice_signals(ptid) \
(*current_target.to_notice_signals) (ptid)
PASS_SIGNALS is an array of size NSIG, indexed by target signal number
(enum target_signal). For every signal whose entry in this array is
non-zero, the target is allowed -but not required- to skip reporting
arrival of the signal to the GDB core by returning from target_wait,
and to pass the signal directly to the inferior instead.
However, if the target is hardware single-stepping a thread that is
about to receive a signal, it needs to be reported in any case, even
if mentioned in a previous target_pass_signals call. */
extern void target_pass_signals (int nsig, unsigned char *pass_signals);
/* Check to see if a thread is still alive. */