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Use function_view in cli-script.c 

This changes some functions in cli-script.c to use function_view
rather than a function pointer and closure argument.  This simplifies
the code a bit and is useful in a subsequent patch.

ChangeLog
2018-05-04  Tom Tromey  <tom@tromey.com>

	* tracepoint.c (actions_command): Update.
	* mi/mi-cmd-break.c (mi_command_line_array)
	(mi_command_line_array_cnt, mi_command_line_array_ptr)
	(mi_read_next_line): Remove.
	(mi_cmd_break_commands): Update.
	* cli/cli-script.h (read_command_lines, read_command_lines_1): Use
	function_view.
	* cli/cli-script.c (get_command_line): Update.
	(process_next_line): Use function_view.  Constify.
	(recurse_read_control_structure, read_command_lines)
	(read_command_lines_1): Change argument types to function_view.
	(do_define_command, document_command): Update.
	* breakpoint.h (check_tracepoint_command): Don't declare.
	* breakpoint.c (check_tracepoint_command): Remove.
	(commands_command_1, create_tracepoint_from_upload): Update.
This commit is contained in:
Tom Tromey 2018-04-18 16:53:07 -06:00
parent 7a2c85f259
commit 60b3cef2e4
7 changed files with 79 additions and 74 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
gdb/ChangeLog
View File

@ -1,3 +1,21 @@
2018-05-04 Tom Tromey <tom@tromey.com>
* tracepoint.c (actions_command): Update.
* mi/mi-cmd-break.c (mi_command_line_array)
(mi_command_line_array_cnt, mi_command_line_array_ptr)
(mi_read_next_line): Remove.
(mi_cmd_break_commands): Update.
* cli/cli-script.h (read_command_lines, read_command_lines_1): Use
function_view.
* cli/cli-script.c (get_command_line): Update.
(process_next_line): Use function_view. Constify.
(recurse_read_control_structure, read_command_lines)
(read_command_lines_1): Change argument types to function_view.
(do_define_command, document_command): Update.
* breakpoint.h (check_tracepoint_command): Don't declare.
* breakpoint.c (check_tracepoint_command): Remove.
(commands_command_1, create_tracepoint_from_upload): Update.
2018-05-04 Tom Tromey <tom@tromey.com>
PR gdb/11750:

23
gdb/breakpoint.c
View File

@ -1216,14 +1216,6 @@ breakpoint_set_task (struct breakpoint *b, int task)
gdb::observers::breakpoint_modified.notify (b);
}
void
check_tracepoint_command (char *line, void *closure)
{
struct breakpoint *b = (struct breakpoint *) closure;
validate_actionline (line, b);
}
static void
commands_command_1 (const char *arg, int from_tty,
struct command_line *control)
@ -1256,10 +1248,15 @@ commands_command_1 (const char *arg, int from_tty,
"%s, one per line."),
arg);
cmd = read_command_lines (str.c_str (), from_tty, 1,
(is_tracepoint (b)
? check_tracepoint_command : 0),
b);
auto do_validate = [=] (const char *line)
{
validate_actionline (line, b);
};
gdb::function_view<void (const char *)> validator;
if (is_tracepoint (b))
validator = do_validate;
cmd = read_command_lines (str.c_str (), from_tty, 1, validator);
}
}
@ -14783,7 +14780,7 @@ create_tracepoint_from_upload (struct uploaded_tp *utp)
this_utp = utp;
next_cmd = 0;
cmd_list = read_command_lines_1 (read_uploaded_action, 1, NULL, NULL);
cmd_list = read_command_lines_1 (read_uploaded_action, 1, NULL);
breakpoint_set_commands (tp, std::move (cmd_list));
}

4
gdb/breakpoint.h
View File

@ -1608,10 +1608,6 @@ extern int is_tracepoint (const struct breakpoint *b);
it. */
extern VEC(breakpoint_p) *static_tracepoints_here (CORE_ADDR addr);
/* Function that can be passed to read_command_line to validate
that each command is suitable for tracepoint command list. */
extern void check_tracepoint_command (char *line, void *closure);
/* Create an instance of this to start registering breakpoint numbers
for a later "commands" command. */

51
gdb/cli/cli-script.c
View File

@ -39,10 +39,10 @@
/* Prototypes for local functions. */
static enum command_control_type
recurse_read_control_structure (char * (*read_next_line_func) (void),
struct command_line *current_cmd,
void (*validator)(char *, void *),
void *closure);
recurse_read_control_structure
(gdb::function_view<const char * ()> read_next_line_func,
struct command_line *current_cmd,
gdb::function_view<void (const char *)> validator);
static void do_define_command (const char *comname, int from_tty,
const counted_command_line *commands);
@ -163,7 +163,7 @@ get_command_line (enum command_control_type type, const char *arg)
command_lines_deleter ());
/* Read in the body of this command. */
if (recurse_read_control_structure (read_next_line, cmd.get (), 0, 0)
if (recurse_read_control_structure (read_next_line, cmd.get (), 0)
== invalid_control)
{
warning (_("Error reading in canned sequence of commands."));
@ -897,11 +897,13 @@ line_first_arg (const char *p)
Otherwise, only "end" is recognized. */
static enum misc_command_type
process_next_line (char *p, struct command_line **command, int parse_commands,
void (*validator)(char *, void *), void *closure)
process_next_line (const char *p, struct command_line **command,
int parse_commands,
gdb::function_view<void (const char *)> validator)
{
char *p_end;
char *p_start;
const char *p_end;
const char *p_start;
int not_handled = 0;
/* Not sure what to do here. */
@ -1013,10 +1015,9 @@ process_next_line (char *p, struct command_line **command, int parse_commands,
if (validator)
{
TRY
{
validator ((*command)->line, closure);
validator ((*command)->line);
}
CATCH (ex, RETURN_MASK_ALL)
{
@ -1035,10 +1036,9 @@ process_next_line (char *p, struct command_line **command, int parse_commands,
obtain lines of the command. */
static enum command_control_type
recurse_read_control_structure (char * (*read_next_line_func) (void),
recurse_read_control_structure (gdb::function_view<const char * ()> read_next_line_func,
struct command_line *current_cmd,
void (*validator)(char *, void *),
void *closure)
gdb::function_view<void (const char *)> validator)
{
enum misc_command_type val;
enum command_control_type ret;
@ -1061,7 +1061,7 @@ recurse_read_control_structure (char * (*read_next_line_func) (void),
current_cmd->control_type != python_control
&& current_cmd->control_type != guile_control
&& current_cmd->control_type != compile_control,
validator, closure);
validator);
/* Just skip blanks and comments. */
if (val == nop_command)
@ -1114,7 +1114,7 @@ recurse_read_control_structure (char * (*read_next_line_func) (void),
{
control_level++;
ret = recurse_read_control_structure (read_next_line_func, next,
validator, closure);
validator);
control_level--;
if (ret != simple_control)
@ -1140,7 +1140,7 @@ recurse_read_control_structure (char * (*read_next_line_func) (void),
counted_command_line
read_command_lines (const char *prompt_arg, int from_tty, int parse_commands,
void (*validator)(char *, void *), void *closure)
gdb::function_view<void (const char *)> validator)
{
if (from_tty && input_interactive_p (current_ui))
{
@ -1163,13 +1163,13 @@ read_command_lines (const char *prompt_arg, int from_tty, int parse_commands,
counted_command_line head (nullptr, command_lines_deleter ());
if (current_interp_named_p (INTERP_CONSOLE))
head = read_command_lines_1 (read_next_line, parse_commands,
validator, closure);
validator);
else
{
scoped_restore_interp interp_restorer (INTERP_CONSOLE);
head = read_command_lines_1 (read_next_line, parse_commands,
validator, closure);
validator);
}
if (from_tty && input_interactive_p (current_ui)
@ -1184,8 +1184,9 @@ read_command_lines (const char *prompt_arg, int from_tty, int parse_commands,
obtained using READ_NEXT_LINE_FUNC. */
counted_command_line
read_command_lines_1 (char * (*read_next_line_func) (void), int parse_commands,
void (*validator)(char *, void *), void *closure)
read_command_lines_1 (gdb::function_view<const char * ()> read_next_line_func,
int parse_commands,
gdb::function_view<void (const char *)> validator)
{
struct command_line *tail, *next;
counted_command_line head (nullptr, command_lines_deleter ());
@ -1199,7 +1200,7 @@ read_command_lines_1 (char * (*read_next_line_func) (void), int parse_commands,
{
dont_repeat ();
val = process_next_line (read_next_line_func (), &next, parse_commands,
validator, closure);
validator);
/* Ignore blank lines or comments. */
if (val == nop_command)
@ -1221,7 +1222,7 @@ read_command_lines_1 (char * (*read_next_line_func) (void), int parse_commands,
{
control_level++;
ret = recurse_read_control_structure (read_next_line_func, next,
validator, closure);
validator);
control_level--;
if (ret == invalid_control)
@ -1407,7 +1408,7 @@ do_define_command (const char *comname, int from_tty,
{
std::string prompt
= string_printf ("Type commands for definition of \"%s\".", comfull);
cmds = read_command_lines (prompt.c_str (), from_tty, 1, 0, 0);
cmds = read_command_lines (prompt.c_str (), from_tty, 1, 0);
}
else
cmds = *commands;
@ -1464,7 +1465,7 @@ document_command (const char *comname, int from_tty)
std::string prompt = string_printf ("Type documentation for \"%s\".",
comfull);
counted_command_line doclines = read_command_lines (prompt.c_str (),
from_tty, 0, 0, 0);
from_tty, 0, 0);
if (c->doc)
xfree ((char *) c->doc);

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

@ -106,12 +106,11 @@ private:
}
};
extern counted_command_line read_command_lines (const char *, int, int,
void (*)(char *, void *),
void *);
extern counted_command_line read_command_lines_1 (char * (*) (void), int,
void (*)(char *, void *),
void *);
extern counted_command_line read_command_lines
(const char *, int, int, gdb::function_view<void (const char *)>);
extern counted_command_line read_command_lines_1
(gdb::function_view<const char * ()>, int,
gdb::function_view<void (const char *)>);
/* Exported to cli/cli-cmds.c */

40
gdb/mi/mi-cmd-break.c
View File

@ -32,6 +32,7 @@
#include "linespec.h"
#include "gdb_obstack.h"
#include <ctype.h>
#include "tracepoint.h"
enum
{
@ -468,24 +469,6 @@ mi_cmd_break_watch (const char *command, char **argv, int argc)
}
}
/* The mi_read_next_line consults these variable to return successive
command lines. While it would be clearer to use a closure pointer,
it is not expected that any future code will use read_command_lines_1,
therefore no point of overengineering. */
static char **mi_command_line_array;
static int mi_command_line_array_cnt;
static int mi_command_line_array_ptr;
static char *
mi_read_next_line (void)
{
if (mi_command_line_array_ptr == mi_command_line_array_cnt)
return NULL;
else
return mi_command_line_array[mi_command_line_array_ptr++];
}
void
mi_cmd_break_commands (const char *command, char **argv, int argc)
{
@ -509,15 +492,24 @@ mi_cmd_break_commands (const char *command, char **argv, int argc)
if (b == NULL)
error (_("breakpoint %d not found."), bnum);
mi_command_line_array = argv;
mi_command_line_array_ptr = 1;
mi_command_line_array_cnt = argc;
int count = 1;
auto reader
= [&] ()
{
const char *result = nullptr;
if (count < argc)
result = argv[count++];
return result;
};
if (is_tracepoint (b))
break_command = read_command_lines_1 (mi_read_next_line, 1,
check_tracepoint_command, b);
break_command = read_command_lines_1 (reader, 1,
[=] (const char *line)
{
validate_actionline (line, b);
});
else
break_command = read_command_lines_1 (mi_read_next_line, 1, 0, 0);
break_command = read_command_lines_1 (reader, 1, 0);
breakpoint_set_commands (b, std::move (break_command));
}

6
gdb/tracepoint.c
View File

@ -579,8 +579,10 @@ actions_command (const char *args, int from_tty)
counted_command_line l = read_command_lines (tmpbuf.c_str (),
from_tty, 1,
check_tracepoint_command,
t);
[=] (const char *line)
{
validate_actionline (line, t);
});
breakpoint_set_commands (t, std::move (l));
}
/* else just return */