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* infrun.c (normal_stop): Use has_stack_frames instead of

Browse Source 
target_has_stack.
	* mi/mi-main.c (mi_execute_command): Avoid calling inferior_thread
	when there is no thread selected.
	(mi_cmd_execute): Don't special case commands that can run without
	a valid selected thread.
	* top.c (execute_command): Don't special case commands that can
	run without a valid selected thread.  Use has_stack_frames.
	* infcmd.c (ensure_valid_thread): New.
	(continue_1, step_1, jump_command, signal_command): Use it.
	(detach_command): Error out if there's no selected thread/inferior.
	* thread.c (print_thread_info): Allow having no thread selected.
	(switch_to_thread): Don't read the PC if there is no current thread.
	(do_restore_current_thread_cleanup): Don't record the current
	frame if there is no current thread.
	(make_cleanup_restore_current_thread): Don't read frame info if
	there is no selected thread.
	(_initialize_thread): Don't mark commands as
	"no_selected_thread_ok".
	* frame.c (get_current_frame): Error out if there is no valid
	selected thread.
	(has_stack_frames): Return false if there is no valid
	selected thread.
	* cli/cli-cmds.c (init_cli_cmds): Don't mark commands as
	"no_selected_thread_ok".
	* cli/cli-decode.c (set_cmd_no_selected_thread_ok)
	(get_cmd_no_selected_thread_ok): Delete.
	* cli/cli-decode.h (CMD_NO_SELECTED_THREAD_OK): Delete.
	(set_cmd_no_selected_thread_ok, get_cmd_no_selected_thread_ok):
	Delete declaration.
	* stack.c (get_selected_block): Use has_stack_frames.
This commit is contained in:
Pedro Alves 2009-03-25 21:42:35 +00:00
parent f04c6d38e2
commit d729566a19
12 changed files with 137 additions and 134 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
gdb/ChangeLog
View File

@ -1,3 +1,37 @@
2009-03-25 Pedro Alves <pedro@codesourcery.com>
* infrun.c (normal_stop): Use has_stack_frames instead of
target_has_stack.
* mi/mi-main.c (mi_execute_command): Avoid calling inferior_thread
when there is no thread selected.
(mi_cmd_execute): Don't special case commands that can run without
a valid selected thread.
* top.c (execute_command): Don't special case commands that can
run without a valid selected thread. Use has_stack_frames.
* infcmd.c (ensure_valid_thread): New.
(continue_1, step_1, jump_command, signal_command): Use it.
(detach_command): Error out if there's no selected thread/inferior.
* thread.c (print_thread_info): Allow having no thread selected.
(switch_to_thread): Don't read the PC if there is no current thread.
(do_restore_current_thread_cleanup): Don't record the current
frame if there is no current thread.
(make_cleanup_restore_current_thread): Don't read frame info if
there is no selected thread.
(_initialize_thread): Don't mark commands as
"no_selected_thread_ok".
* frame.c (get_current_frame): Error out if there is no valid
selected thread.
(has_stack_frames): Return false if there is no valid
selected thread.
* cli/cli-cmds.c (init_cli_cmds): Don't mark commands as
"no_selected_thread_ok".
* cli/cli-decode.c (set_cmd_no_selected_thread_ok)
(get_cmd_no_selected_thread_ok): Delete.
* cli/cli-decode.h (CMD_NO_SELECTED_THREAD_OK): Delete.
(set_cmd_no_selected_thread_ok, get_cmd_no_selected_thread_ok):
Delete declaration.
* stack.c (get_selected_block): Use has_stack_frames.
2009-03-25 Thiago Jung Bauermann <bauerman@br.ibm.com>
Fix size of FPSCR in Power 7 processors.

14
gdb/cli/cli-cmds.c
View File

@ -1248,9 +1248,8 @@ The commands below can be used to select other frames by number or address."),
/* Define general commands. */
c = add_com ("pwd", class_files, pwd_command, _("\
add_com ("pwd", class_files, pwd_command, _("\
Print working directory. This is used for your program as well."));
set_cmd_no_selected_thread_ok (c);
c = add_cmd ("cd", class_files, cd_command, _("\
Set working directory to DIR for debugger and program being debugged.\n\
@ -1291,7 +1290,6 @@ when GDB is started."), gdbinit);
c = add_com ("help", class_support, help_command,
_("Print list of commands."));
set_cmd_completer (c, command_completer);
set_cmd_no_selected_thread_ok (c);
add_com_alias ("q", "quit", class_support, 1);
add_com_alias ("h", "help", class_support, 1);
@ -1317,19 +1315,17 @@ Without an argument, history expansion is enabled."),
show_history_expansion_p,
&sethistlist, &showhistlist);
c = add_prefix_cmd ("info", class_info, info_command, _("\
add_prefix_cmd ("info", class_info, info_command, _("\
Generic command for showing things about the program being debugged."),
&infolist, "info ", 0, &cmdlist);
set_cmd_no_selected_thread_ok (c);
&infolist, "info ", 0, &cmdlist);
add_com_alias ("i", "info", class_info, 1);
add_com ("complete", class_obscure, complete_command,
_("List the completions for the rest of the line as a command."));
c = add_prefix_cmd ("show", class_info, show_command, _("\
add_prefix_cmd ("show", class_info, show_command, _("\
Generic command for showing things about the debugger."),
&showlist, "show ", 0, &cmdlist);
set_cmd_no_selected_thread_ok (c);
&showlist, "show ", 0, &cmdlist);
/* Another way to get at the same thing. */
add_info ("set", show_command, _("Show all GDB settings."));

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

@ -112,18 +112,6 @@ get_cmd_context (struct cmd_list_element *cmd)
return cmd->context;
}
void
set_cmd_no_selected_thread_ok (struct cmd_list_element *cmd)
{
cmd->flags |= CMD_NO_SELECTED_THREAD_OK;
}
int
get_cmd_no_selected_thread_ok (struct cmd_list_element *cmd)
{
return cmd->flags & CMD_NO_SELECTED_THREAD_OK;
}
enum cmd_types
cmd_type (struct cmd_list_element *cmd)
{

11
gdb/cli/cli-decode.h
View File

@ -48,10 +48,6 @@ cmd_types;
#define DEPRECATED_WARN_USER 0x2
#define MALLOCED_REPLACEMENT 0x4
/* This flag is set if the command is allowed to run when the target
has execution, but there's no selected thread. */
#define CMD_NO_SELECTED_THREAD_OK 0x10
struct cmd_list_element
{
/* Points to next command in this list. */
@ -259,13 +255,6 @@ extern int cmd_cfunc_eq (struct cmd_list_element *cmd,
extern void set_cmd_context (struct cmd_list_element *cmd, void *context);
extern void *get_cmd_context (struct cmd_list_element *cmd);
/* Mark command as ok to call when there is no selected thread. There
is no way to disable this once set. */
extern void set_cmd_no_selected_thread_ok (struct cmd_list_element *);
/* Return true if command is no-selected-thread-ok. */
extern int get_cmd_no_selected_thread_ok (struct cmd_list_element *);
extern struct cmd_list_element *lookup_cmd (char **,
struct cmd_list_element *, char *,
int, int);

15
gdb/frame.c
View File

@ -980,6 +980,10 @@ get_current_frame (void)
error (_("No stack."));
if (!target_has_memory)
error (_("No memory."));
if (ptid_equal (inferior_ptid, null_ptid))
error (_("No selected thread."));
if (is_exited (inferior_ptid))
error (_("Invalid selected thread."));
if (is_executing (inferior_ptid))
error (_("Target is executing."));
@ -1009,8 +1013,15 @@ has_stack_frames (void)
if (!target_has_registers || !target_has_stack || !target_has_memory)
return 0;
/* If the current thread is executing, don't try to read from
it. */
/* No current inferior, no frame. */
if (ptid_equal (inferior_ptid, null_ptid))
return 0;
/* Don't try to read from a dead thread. */
if (is_exited (inferior_ptid))
return 0;
/* ... or from a spinning thread. */
if (is_executing (inferior_ptid))
return 0;

17
gdb/infcmd.c
View File

@ -616,6 +616,15 @@ proceed_thread_callback (struct thread_info *thread, void *arg)
return 0;
}
void
ensure_valid_thread (void)
{
if (ptid_equal (inferior_ptid, null_ptid)
|| is_exited (inferior_ptid))
error (_("\
Cannot execute this command without a live selected thread."));
}
void
continue_1 (int all_threads)
{
@ -637,6 +646,7 @@ continue_1 (int all_threads)
}
else
{
ensure_valid_thread ();
ensure_not_running ();
clear_proceed_status ();
proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
@ -781,6 +791,7 @@ step_1 (int skip_subroutines, int single_inst, char *count_string)
int thread = -1;
ERROR_NO_INFERIOR;
ensure_valid_thread ();
ensure_not_running ();
if (count_string)
@ -991,6 +1002,7 @@ jump_command (char *arg, int from_tty)
int async_exec = 0;
ERROR_NO_INFERIOR;
ensure_valid_thread ();
ensure_not_running ();
/* Find out whether we must run in the background. */
@ -1092,6 +1104,7 @@ signal_command (char *signum_exp, int from_tty)
dont_repeat (); /* Too dangerous. */
ERROR_NO_INFERIOR;
ensure_valid_thread ();
ensure_not_running ();
/* Find out whether we must run in the background. */
@ -2383,6 +2396,10 @@ void
detach_command (char *args, int from_tty)
{
dont_repeat (); /* Not for the faint of heart. */
if (ptid_equal (inferior_ptid, null_ptid))
error (_("The program is not being run."));
target_detach (args, from_tty);
/* If the solist is global across inferiors, don't clear it when we

4
gdb/infrun.c
View File

@ -4302,7 +4302,7 @@ Further execution is probably impossible.\n"));
/* Set the current source location. This will also happen if we
display the frame below, but the current SAL will be incorrect
during a user hook-stop function. */
if (target_has_stack && !stop_stack_dummy)
if (has_stack_frames () && !stop_stack_dummy)
set_current_sal_from_frame (get_current_frame (), 1);
/* Let the user/frontend see the threads as stopped. */
@ -4314,7 +4314,7 @@ Further execution is probably impossible.\n"));
catch_errors (hook_stop_stub, stop_command,
"Error while running hook_stop:\n", RETURN_MASK_ALL);
if (!target_has_stack)
if (!has_stack_frames ())
goto done;
if (last.kind == TARGET_WAITKIND_SIGNALLED

35
gdb/mi/mi-main.c
View File

@ -1284,21 +1284,23 @@ mi_execute_command (char *cmd, int from_tty)
&& strcmp (command->command, "thread-select") != 0)
{
struct mi_interp *mi = top_level_interpreter_data ();
struct thread_info *ti = inferior_thread ();
int report_change;
int report_change = 0;
if (command->thread == -1)
{
report_change = !ptid_equal (previous_ptid, null_ptid)
&& !ptid_equal (inferior_ptid, previous_ptid);
report_change = (!ptid_equal (previous_ptid, null_ptid)
&& !ptid_equal (inferior_ptid, previous_ptid)
&& !ptid_equal (inferior_ptid, null_ptid));
}
else
else if (!ptid_equal (inferior_ptid, null_ptid))
{
struct thread_info *ti = inferior_thread ();
report_change = (ti->num != command->thread);
}
if (report_change)
{
struct thread_info *ti = inferior_thread ();
target_terminal_ours ();
fprintf_unfiltered (mi->event_channel,
"thread-selected,id=\"%d\"",
@ -1353,28 +1355,7 @@ mi_cmd_execute (struct mi_parse *parse)
}
if (parse->cmd->argv_func != NULL)
{
if (target_can_async_p ()
&& target_has_execution
&& is_exited (inferior_ptid)
&& (strcmp (parse->command, "thread-info") != 0
&& strcmp (parse->command, "thread-list-ids") != 0
&& strcmp (parse->command, "thread-select") != 0
&& strcmp (parse->command, "list-thread-groups") != 0))
{
struct ui_file *stb;
stb = mem_fileopen ();
fputs_unfiltered ("Cannot execute command ", stb);
fputstr_unfiltered (parse->command, '"', stb);
fputs_unfiltered (" without a selected thread", stb);
make_cleanup_ui_file_delete (stb);
error_stream (stb);
}
parse->cmd->argv_func (parse->command, parse->argv, parse->argc);
}
parse->cmd->argv_func (parse->command, parse->argv, parse->argc);
else if (parse->cmd->cli.cmd != 0)
{
/* FIXME: DELETE THIS. */

24
gdb/remote.c
View File

@ -6606,19 +6606,6 @@ remote_mourn_1 (struct target_ops *target)
generic_mourn_inferior ();
}
static int
select_new_thread_callback (struct thread_info *th, void* data)
{
if (!is_exited (th->ptid))
{
switch_to_thread (th->ptid);
printf_filtered (_("[Switching to %s]\n"),
target_pid_to_str (inferior_ptid));
return 1;
}
return 0;
}
static void
extended_remote_mourn_1 (struct target_ops *target)
{
@ -6662,16 +6649,7 @@ extended_remote_mourn_1 (struct target_ops *target)
/* Call common code to mark the inferior as not running. */
generic_mourn_inferior ();
if (have_inferiors ())
{
extern void nullify_last_target_wait_ptid ();
/* Multi-process case. The current process has exited, but
there are other processes to debug. Switch to the first
available. */
iterate_over_threads (select_new_thread_callback, NULL);
nullify_last_target_wait_ptid ();
}
else
if (!have_inferiors ())
{
if (!remote_multi_process_p (rs))
{

8
gdb/stack.c
View File

@ -1694,13 +1694,7 @@ select_and_print_frame (struct frame_info *frame)
struct block *
get_selected_block (CORE_ADDR *addr_in_block)
{
if (!target_has_stack)
return 0;
if (is_exited (inferior_ptid))
return 0;
if (is_executing (inferior_ptid))
if (!has_stack_frames ())
return 0;
return get_frame_block (get_selected_frame (NULL), addr_in_block);

87
gdb/thread.c
View File

@ -785,10 +785,11 @@ print_thread_info (struct ui_out *uiout, int requested_thread, int pid)
the "info threads" command. */
do_cleanups (old_chain);
if (pid == -1 && requested_thread == -1 )
if (pid == -1 && requested_thread == -1)
{
gdb_assert (current_thread != -1
|| !thread_list);
|| !thread_list
|| ptid_equal (inferior_ptid, null_ptid));
if (current_thread != -1 && ui_out_is_mi_like_p (uiout))
ui_out_field_int (uiout, "current-thread-id", current_thread);
@ -796,6 +797,11 @@ print_thread_info (struct ui_out *uiout, int requested_thread, int pid)
ui_out_message (uiout, 0, "\n\
The current thread <Thread ID %d> has terminated. See `help thread'.\n",
current_thread);
else if (thread_list
&& current_thread == -1
&& ptid_equal (current_ptid, null_ptid))
ui_out_message (uiout, 0, "\n\
No selected thread. See `help thread'.\n");
}
}
@ -828,7 +834,9 @@ switch_to_thread (ptid_t ptid)
/* We don't check for is_stopped, because we're called at times
while in the TARGET_RUNNING state, e.g., while handling an
internal event. */
if (!is_exited (ptid) && !is_executing (ptid))
if (!ptid_equal (inferior_ptid, null_ptid)
&& !is_exited (ptid)
&& !is_executing (ptid))
stop_pc = read_pc ();
else
stop_pc = ~(CORE_ADDR) 0;
@ -909,11 +917,24 @@ do_restore_current_thread_cleanup (void *arg)
{
struct thread_info *tp;
struct current_thread_cleanup *old = arg;
restore_current_thread (old->inferior_ptid);
tp = find_thread_pid (old->inferior_ptid);
/* If the previously selected thread belonged to a process that has
in the mean time been deleted (due to normal exit, detach, etc.),
then don't revert back to it, but instead simply drop back to no
thread selected. */
if (tp
&& is_exited (tp->ptid)
&& find_inferior_pid (ptid_get_pid (tp->ptid)) == NULL)
restore_current_thread (null_ptid);
else
restore_current_thread (old->inferior_ptid);
/* The running state of the originally selected thread may have
changed, so we have to recheck it here. */
if (old->was_stopped
if (!ptid_equal (inferior_ptid, null_ptid)
&& old->was_stopped
&& is_stopped (inferior_ptid)
&& target_has_registers
&& target_has_stack
@ -942,21 +963,25 @@ make_cleanup_restore_current_thread (void)
old = xmalloc (sizeof (struct current_thread_cleanup));
old->inferior_ptid = inferior_ptid;
old->was_stopped = is_stopped (inferior_ptid);
if (old->was_stopped
&& target_has_registers
&& target_has_stack
&& target_has_memory)
frame = get_selected_frame (NULL);
else
frame = NULL;
old->selected_frame_id = get_frame_id (frame);
old->selected_frame_level = frame_relative_level (frame);
if (!ptid_equal (inferior_ptid, null_ptid))
{
old->was_stopped = is_stopped (inferior_ptid);
if (old->was_stopped
&& target_has_registers
&& target_has_stack
&& target_has_memory)
frame = get_selected_frame (NULL);
else
frame = NULL;
tp = find_thread_pid (inferior_ptid);
if (tp)
tp->refcount++;
old->selected_frame_id = get_frame_id (frame);
old->selected_frame_level = frame_relative_level (frame);
tp = find_thread_pid (inferior_ptid);
if (tp)
tp->refcount++;
}
return make_cleanup_dtor (do_restore_current_thread_cleanup, old,
restore_current_thread_cleanup_dtor);
@ -1086,6 +1111,9 @@ thread_command (char *tidstr, int from_tty)
{
if (!tidstr)
{
if (ptid_equal (inferior_ptid, null_ptid))
error (_("No thread selected"));
if (target_has_stack)
{
if (is_exited (inferior_ptid))
@ -1172,26 +1200,21 @@ void
_initialize_thread (void)
{
static struct cmd_list_element *thread_apply_list = NULL;
struct cmd_list_element *c;
c = add_info ("threads", info_threads_command,
_("IDs of currently known threads."));
set_cmd_no_selected_thread_ok (c);
add_info ("threads", info_threads_command,
_("IDs of currently known threads."));
c = add_prefix_cmd ("thread", class_run, thread_command, _("\
add_prefix_cmd ("thread", class_run, thread_command, _("\
Use this command to switch between threads.\n\
The new thread ID must be currently known."),
&thread_cmd_list, "thread ", 1, &cmdlist);
set_cmd_no_selected_thread_ok (c);
&thread_cmd_list, "thread ", 1, &cmdlist);
c = add_prefix_cmd ("apply", class_run, thread_apply_command,
_("Apply a command to a list of threads."),
&thread_apply_list, "thread apply ", 1, &thread_cmd_list);
set_cmd_no_selected_thread_ok (c);
add_prefix_cmd ("apply", class_run, thread_apply_command,
_("Apply a command to a list of threads."),
&thread_apply_list, "thread apply ", 1, &thread_cmd_list);
c = add_cmd ("all", class_run, thread_apply_all_command,
_("Apply a command to all threads."), &thread_apply_list);
set_cmd_no_selected_thread_ok (c);
add_cmd ("all", class_run, thread_apply_all_command,
_("Apply a command to all threads."), &thread_apply_list);
if (!xdb_commands)
add_com_alias ("t", "thread", class_run, 1);

10
gdb/top.c
View File

@ -400,14 +400,6 @@ execute_command (char *p, int from_tty)
c = lookup_cmd (&p, cmdlist, "", 0, 1);
/* If the selected thread has terminated, we allow only a
limited set of commands. */
if (target_can_async_p ()
&& is_exited (inferior_ptid)
&& !get_cmd_no_selected_thread_ok (c))
error (_("\
Cannot execute this command without a live selected thread. See `help thread'."));
/* Pass null arg rather than an empty one. */
arg = *p ? p : 0;
@ -469,7 +461,7 @@ Cannot execute this command without a live selected thread. See `help thread'."
/* FIXME: This should be cacheing the frame and only running when
the frame changes. */
if (target_has_stack && is_stopped (inferior_ptid))
if (has_stack_frames ())
{
flang = get_frame_language ();
if (!warned