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Do target_terminal_ours in query & friends instead of in all callers

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Any time a caller calls query & friends / prompt_for_continue without
ensuring that gdb owns the terminal for input is a bug.  So do that in
defaulted_query / prompt_for_continue directly instead.

An example of a case where we currently miss calling
target_terminal_ours is internal_error.  Ever since defaulted_query
was made to use gdb_readline_callback, there's no way to answer the
internal error query if the internal error happens while the target is
has the terminal:

  (gdb) c
  Continuing.
  .../src/gdb/linux-nat.c:1676: internal-error: linux_nat_resume: Assertion `dummy_counter < 10' failed.
  A problem internal to GDB has been detected,
  further debugging may prove unreliable.
  Quit this debugging session? (y or n) _

Entering 'y' or 'n' does not work, GDB does not respond.

gdb/ChangeLog:
2016-04-12  Pedro Alves  <palves@redhat.com>

	PR gdb/19828
	* gnu-nat.c (inf_validate_task_sc): Don't call
	target_terminal_ours / target_terminal_inferior around query.
	* i386-tdep.c (i386_record_lea_modrm, i386_process_record): Don't
	call target_terminal_ours / target_terminal_inferior around
	yquery.
	* linux-record.c (record_linux_system_call): Don't call
	target_terminal_ours / target_terminal_inferior around yquery.
	* nto-procfs.c (interrupt_query): Don't call target_terminal_ours
	/ target_terminal_inferior around query.
	* record-full.c (record_full_check_insn_num): Remove
	'set_terminal' parameter.  Don't call target_terminal_ours /
	target_terminal_inferior around query.
	(record_full_message, record_full_registers_change)
	(record_full_xfer_partial): Adjust.
	* remote.c (interrupt_query): Don't call target_terminal_ours /
	target_terminal_inferior around query.
	* utils.c (defaulted_query): Install cleanup to restore target
	terminal.  Put target_terminal_ours_for_output in effect while
	defaulted producing, and target_terminal_ours in in effect while
	handling input.
	(prompt_for_continue): Install cleanup to restore target terminal.
	Put target_terminal_ours in in effect while handling input.
This commit is contained in:
Pedro Alves 2016-04-12 16:49:32 +01:00
parent 80dbc9fdc7
commit 651ce16aa7
8 changed files with 75 additions and 114 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
gdb/ChangeLog
View File

@ -1,3 +1,29 @@
2016-04-12 Pedro Alves <palves@redhat.com>
PR gdb/19828
* gnu-nat.c (inf_validate_task_sc): Don't call
target_terminal_ours / target_terminal_inferior around query.
* i386-tdep.c (i386_record_lea_modrm, i386_process_record): Don't
call target_terminal_ours / target_terminal_inferior around
yquery.
* linux-record.c (record_linux_system_call): Don't call
target_terminal_ours / target_terminal_inferior around yquery.
* nto-procfs.c (interrupt_query): Don't call target_terminal_ours
/ target_terminal_inferior around query.
* record-full.c (record_full_check_insn_num): Remove
'set_terminal' parameter. Don't call target_terminal_ours /
target_terminal_inferior around query.
(record_full_message, record_full_registers_change)
(record_full_xfer_partial): Adjust.
* remote.c (interrupt_query): Don't call target_terminal_ours /
target_terminal_inferior around query.
* utils.c (defaulted_query): Install cleanup to restore target
terminal. Put target_terminal_ours_for_output in effect while
defaulted producing, and target_terminal_ours in in effect while
handling input.
(prompt_for_continue): Install cleanup to restore target terminal.
Put target_terminal_ours in in effect while handling input.
2016-04-12 Pedro Alves <palves@redhat.com>
* utils.c (defaulted_query, prompt_for_continue): Free temporary

12
gdb/gnu-nat.c
View File

@ -852,15 +852,9 @@ inf_validate_task_sc (struct inf *inf)
if (inf->task->cur_sc < suspend_count)
{
int abort;
target_terminal_ours (); /* Allow I/O. */
abort = !query (_("Pid %d has an additional task suspend count of %d;"
" clear it? "), inf->pid,
suspend_count - inf->task->cur_sc);
target_terminal_inferior (); /* Give it back to the child. */
if (abort)
if (!query (_("Pid %d has an additional task suspend count of %d;"
" clear it? "), inf->pid,
suspend_count - inf->task->cur_sc))
error (_("Additional task suspend count left untouched."));
inf->task->cur_sc = suspend_count;

49
gdb/i386-tdep.c
View File

@ -4914,17 +4914,12 @@ i386_record_lea_modrm (struct i386_record_s *irp)
{
if (record_full_memory_query)
{
int q;
target_terminal_ours ();
q = yquery (_("\
if (yquery (_("\
Process record ignores the memory change of instruction at address %s\n\
because it can't get the value of the segment register.\n\
Do you want to stop the program?"),
paddress (gdbarch, irp->orig_addr));
target_terminal_inferior ();
if (q)
return -1;
paddress (gdbarch, irp->orig_addr)))
return -1;
}
return 0;
@ -5805,16 +5800,11 @@ i386_process_record (struct gdbarch *gdbarch, struct regcache *regcache,
{
if (record_full_memory_query)
{
int q;
target_terminal_ours ();
q = yquery (_("\
if (yquery (_("\
Process record ignores the memory change of instruction at address %s\n\
because it can't get the value of the segment register.\n\
Do you want to stop the program?"),
paddress (gdbarch, ir.orig_addr));
target_terminal_inferior ();
if (q)
paddress (gdbarch, ir.orig_addr)))
return -1;
}
}
@ -6479,16 +6469,11 @@ Do you want to stop the program?"),
/* addr += ((uint32_t) read_register (I386_ES_REGNUM)) << 4; */
if (record_full_memory_query)
{
int q;
target_terminal_ours ();
q = yquery (_("\
if (yquery (_("\
Process record ignores the memory change of instruction at address %s\n\
because it can't get the value of the segment register.\n\
Do you want to stop the program?"),
paddress (gdbarch, ir.orig_addr));
target_terminal_inferior ();
if (q)
paddress (gdbarch, ir.orig_addr)))
return -1;
}
}
@ -7034,17 +7019,12 @@ Do you want to stop the program?"),
{
if (record_full_memory_query)
{
int q;
target_terminal_ours ();
q = yquery (_("\
if (yquery (_("\
Process record ignores the memory change of instruction at address %s\n\
because it can't get the value of the segment register.\n\
Do you want to stop the program?"),
paddress (gdbarch, ir.orig_addr));
target_terminal_inferior ();
if (q)
return -1;
paddress (gdbarch, ir.orig_addr)))
return -1;
}
}
else
@ -7091,16 +7071,11 @@ Do you want to stop the program?"),
{
if (record_full_memory_query)
{
int q;
target_terminal_ours ();
q = yquery (_("\
if (yquery (_("\
Process record ignores the memory change of instruction at address %s\n\
because it can't get the value of the segment register.\n\
Do you want to stop the program?"),
paddress (gdbarch, ir.orig_addr));
target_terminal_inferior ();
if (q)
paddress (gdbarch, ir.orig_addr)))
return -1;
}
}

54
gdb/linux-record.c
View File

@ -254,17 +254,10 @@ record_linux_system_call (enum gdb_syscall syscall,
break;
case gdb_sys_exit:
{
int q;
target_terminal_ours ();
q = yquery (_("The next instruction is syscall exit. "
"It will make the program exit. "
"Do you want to stop the program?"));
target_terminal_inferior ();
if (q)
return 1;
}
if (yquery (_("The next instruction is syscall exit. "
"It will make the program exit. "
"Do you want to stop the program?")))
return 1;
break;
case gdb_sys_fork:
@ -663,17 +656,10 @@ record_linux_system_call (enum gdb_syscall syscall,
break;
case gdb_sys_reboot:
{
int q;
target_terminal_ours ();
q = yquery (_("The next instruction is syscall reboot. "
"It will restart the computer. "
"Do you want to stop the program?"));
target_terminal_inferior ();
if (q)
return 1;
}
if (yquery (_("The next instruction is syscall reboot. "
"It will restart the computer. "
"Do you want to stop the program?")))
return 1;
break;
case gdb_old_readdir:
@ -693,17 +679,12 @@ record_linux_system_call (enum gdb_syscall syscall,
regcache_raw_read_unsigned (regcache, tdep->arg2, &len);
if (record_full_memory_query)
{
int q;
target_terminal_ours ();
q = yquery (_("\
if (yquery (_("\
The next instruction is syscall munmap.\n\
It will free the memory addr = 0x%s len = %u.\n\
It will make record target cannot record some memory change.\n\
Do you want to stop the program?"),
OUTPUT_REG (tmpulongest, tdep->arg1), (int) len);
target_terminal_inferior ();
if (q)
OUTPUT_REG (tmpulongest, tdep->arg1), (int) len))
return 1;
}
}
@ -1764,17 +1745,10 @@ Do you want to stop the program?"),
break;
case gdb_sys_exit_group:
{
int q;
target_terminal_ours ();
q = yquery (_("The next instruction is syscall exit_group. "
"It will make the program exit. "
"Do you want to stop the program?"));
target_terminal_inferior ();
if (q)
return 1;
}
if (yquery (_("The next instruction is syscall exit_group. "
"It will make the program exit. "
"Do you want to stop the program?")))
return 1;
break;
case gdb_sys_lookup_dcookie:

4
gdb/nto-procfs.c
View File

@ -723,16 +723,12 @@ do_attach (ptid_t ptid)
static void
interrupt_query (void)
{
target_terminal_ours ();
if (query (_("Interrupted while waiting for the program.\n\
Give up (and stop debugging it)? ")))
{
target_mourn_inferior ();
quit ();
}
target_terminal_inferior ();
}
/* The user typed ^C twice. */

22
gdb/record-full.c
View File

@ -535,26 +535,18 @@ record_full_arch_list_add_end (void)
}
static void
record_full_check_insn_num (int set_terminal)
record_full_check_insn_num (void)
{
if (record_full_insn_num == record_full_insn_max_num)
{
/* Ask user what to do. */
if (record_full_stop_at_limit)
{
int q;
if (set_terminal)
target_terminal_ours ();
q = yquery (_("Do you want to auto delete previous execution "
if (!yquery (_("Do you want to auto delete previous execution "
"log entries when record/replay buffer becomes "
"full (record full stop-at-limit)?"));
if (set_terminal)
target_terminal_inferior ();
if (q)
record_full_stop_at_limit = 0;
else
"full (record full stop-at-limit)?")))
error (_("Process record: stopped by user."));
record_full_stop_at_limit = 0;
}
}
}
@ -583,7 +575,7 @@ record_full_message (struct regcache *regcache, enum gdb_signal signal)
record_full_arch_list_tail = NULL;
/* Check record_full_insn_num. */
record_full_check_insn_num (1);
record_full_check_insn_num ();
/* If gdb sends a signal value to target_resume,
save it in the 'end' field of the previous instruction.
@ -1420,7 +1412,7 @@ static void
record_full_registers_change (struct regcache *regcache, int regnum)
{
/* Check record_full_insn_num. */
record_full_check_insn_num (0);
record_full_check_insn_num ();
record_full_arch_list_head = NULL;
record_full_arch_list_tail = NULL;
@ -1546,7 +1538,7 @@ record_full_xfer_partial (struct target_ops *ops, enum target_object object,
}
/* Check record_full_insn_num */
record_full_check_insn_num (0);
record_full_check_insn_num ();
/* Record registers change to list as an instruction. */
record_full_arch_list_head = NULL;

6
gdb/remote.c
View File

@ -5902,10 +5902,6 @@ static void
interrupt_query (void)
{
struct remote_state *rs = get_remote_state ();
struct cleanup *old_chain;
old_chain = make_cleanup_restore_target_terminal ();
target_terminal_ours ();
if (rs->waiting_for_stop_reply && rs->ctrlc_pending_p)
{
@ -5922,8 +5918,6 @@ interrupt_query (void)
"Give up waiting? ")))
quit ();
}
do_cleanups (old_chain);
}
/* Enable/disable target terminal ownership. Most targets can use

16
gdb/utils.c
View File

@ -1274,12 +1274,15 @@ defaulted_query (const char *ctlstr, const char defchar, va_list args)
if (!confirm || server_command)
return def_value;
old_chain = make_cleanup_restore_target_terminal ();
/* If input isn't coming from the user directly, just say what
question we're asking, and then answer the default automatically. This
way, important error messages don't get lost when talking to GDB
over a pipe. */
if (! input_from_terminal_p ())
{
target_terminal_ours_for_output ();
wrap_here ("");
vfprintf_filtered (gdb_stdout, ctlstr, args);
@ -1288,15 +1291,18 @@ defaulted_query (const char *ctlstr, const char defchar, va_list args)
y_string, n_string, def_answer);
gdb_flush (gdb_stdout);
do_cleanups (old_chain);
return def_value;
}
if (deprecated_query_hook)
{
return deprecated_query_hook (ctlstr, args);
}
int res;
old_chain = make_cleanup (null_cleanup, NULL);
res = deprecated_query_hook (ctlstr, args);
do_cleanups (old_chain);
return res;
}
/* Format the question outside of the loop, to avoid reusing args. */
question = xstrvprintf (ctlstr, args);
@ -1310,6 +1316,9 @@ defaulted_query (const char *ctlstr, const char defchar, va_list args)
/* Used for calculating time spend waiting for user. */
gettimeofday (&prompt_started, NULL);
/* We'll need to handle input. */
target_terminal_ours ();
while (1)
{
char *response, answer;
@ -1881,6 +1890,7 @@ prompt_for_continue (void)
reinitialize_more_filter ();
/* We'll need to handle input. */
make_cleanup_restore_target_terminal ();
target_terminal_ours ();
/* Call gdb_readline_wrapper, not readline, in order to keep an