/* Print values for GNU debugger GDB.
- Copyright (C) 1986-2017 Free Software Foundation, Inc.
+ Copyright (C) 1986-2018 Free Software Foundation, Inc.
This file is part of GDB.
#include "block.h"
#include "disasm.h"
#include "target-float.h"
-#include "observer.h"
+#include "observable.h"
#include "solist.h"
#include "parser-defs.h"
#include "charset.h"
static char last_size = 'w';
+/* Last specified count for the 'x' command. */
+
+static int last_count;
+
/* Default address to examine next, and associated architecture. */
static struct gdbarch *next_gdbarch;
/* Contents of last address examined.
This is not valid past the end of the `x' command! */
-static struct value *last_examine_value;
+static value_ref_ptr last_examine_value;
/* Largest offset between a symbolic value and an address, that will be
printed as `0x1234 <symbol+offset>'. */
object. */
last_examine_address = next_address;
- if (last_examine_value)
- value_free (last_examine_value);
-
/* The value to be displayed is not fetched greedily.
Instead, to avoid the possibility of a fetched value not
being used, its retrieval is delayed until the print code
the disassembler be modified so that LAST_EXAMINE_VALUE
is left with the byte sequence from the last complete
instruction fetched from memory? */
- last_examine_value = value_at_lazy (val_type, next_address);
+ last_examine_value
+ = release_value (value_at_lazy (val_type, next_address));
- if (last_examine_value)
- release_value (last_examine_value);
-
- print_formatted (last_examine_value, size, &opts, gdb_stdout);
+ print_formatted (last_examine_value.get (), size, &opts, gdb_stdout);
/* Display any branch delay slots following the final insn. */
if (format == 'i' && count == 1)
}
static void
-print_command (char *exp, int from_tty)
+print_command (const char *exp, int from_tty)
{
print_command_1 (exp, 1);
}
/* Same as print, except it doesn't print void results. */
static void
-call_command (char *exp, int from_tty)
+call_command (const char *exp, int from_tty)
{
print_command_1 (exp, 0);
}
/* Implementation of the "output" command. */
static void
-output_command (char *exp, int from_tty)
+output_command (const char *exp, int from_tty)
{
output_command_const (exp, from_tty);
}
evaluate_expression (expr.get ());
}
-/* Temporary non-const version of set_command. */
-
-static void
-non_const_set_command (char *exp, int from_tty)
-{
- set_command (exp, from_tty);
-}
-
static void
-info_symbol_command (char *arg, int from_tty)
+info_symbol_command (const char *arg, int from_tty)
{
struct minimal_symbol *msymbol;
struct objfile *objfile;
}
static void
-info_address_command (char *exp, int from_tty)
+info_address_command (const char *exp, int from_tty)
{
struct gdbarch *gdbarch;
int regno;
\f
static void
-x_command (char *exp, int from_tty)
+x_command (const char *exp, int from_tty)
{
struct format_data fmt;
struct value *val;
fmt.count = 1;
fmt.raw = 0;
+ /* If there is no expression and no format, use the most recent
+ count. */
+ if (exp == nullptr && last_count > 0)
+ fmt.count = last_count;
+
if (exp && *exp == '/')
{
const char *tmp = exp + 1;
exp = (char *) tmp;
}
+ last_count = fmt.count;
+
/* If we have an expression, evaluate it and use it as the address. */
if (exp != 0 && *exp != 0)
last_format = fmt.format;
/* Set a couple of internal variables if appropriate. */
- if (last_examine_value)
+ if (last_examine_value != nullptr)
{
/* Make last address examined available to the user as $_. Use
the correct pointer type. */
struct type *pointer_type
- = lookup_pointer_type (value_type (last_examine_value));
+ = lookup_pointer_type (value_type (last_examine_value.get ()));
set_internalvar (lookup_internalvar ("_"),
value_from_pointer (pointer_type,
last_examine_address));
as $__. If the last value has not been fetched from memory
then don't fetch it now; instead mark it by voiding the $__
variable. */
- if (value_lazy (last_examine_value))
+ if (value_lazy (last_examine_value.get ()))
clear_internalvar (lookup_internalvar ("__"));
else
- set_internalvar (lookup_internalvar ("__"), last_examine_value);
+ set_internalvar (lookup_internalvar ("__"), last_examine_value.get ());
}
}
\f
Specify the expression. */
static void
-display_command (char *arg, int from_tty)
+display_command (const char *arg, int from_tty)
{
struct format_data fmt;
struct display *newobj;
fmt.raw = 0;
}
- innermost_block = NULL;
+ innermost_block.reset ();
expression_up expr = parse_expression (exp);
newobj = new display ();
newobj->exp_string = xstrdup (exp);
newobj->exp = std::move (expr);
- newobj->block = innermost_block;
+ newobj->block = innermost_block.block ();
newobj->pspace = current_program_space;
newobj->number = ++display_number;
newobj->format = fmt;
TRY
{
- innermost_block = NULL;
+ innermost_block.reset ();
d->exp = parse_expression (d->exp_string);
- d->block = innermost_block;
+ d->block = innermost_block.block ();
}
CATCH (ex, RETURN_MASK_ALL)
{
}
static void
-info_display_command (char *ignore, int from_tty)
+info_display_command (const char *ignore, int from_tty)
{
struct display *d;
int j;
tem = value_as_address (value);
+ if (tem == 0)
+ {
+ fprintf_filtered (stream, format, "(null)");
+ return;
+ }
/* This is a %s argument. Find the length of the string. */
for (j = 0;; j++)
gdb_byte *buf = (gdb_byte *) alloca (wcwidth);
tem = value_as_address (value);
+ if (tem == 0)
+ {
+ fprintf_filtered (stream, format, "(null)");
+ return;
+ }
/* This is a %s argument. Find the length of the string. */
for (j = 0;; j += wcwidth)
if (val != 0)
*fmt_p++ = '#';
- /* Copy any width. */
- while (*p >= '0' && *p < '9')
+ /* Copy any width or flags. Only the "-" flag is valid for pointers
+ -- see the format_pieces constructor. */
+ while (*p == '-' || (*p >= '0' && *p < '9'))
*fmt_p++ = *p++;
gdb_assert (*p == 'p' && *(p + 1) == '\0');
static void
ui_printf (const char *arg, struct ui_file *stream)
{
- struct format_piece *fpieces;
const char *s = arg;
- struct value **val_args;
- int allocated_args = 20;
- struct cleanup *old_cleanups;
-
- val_args = XNEWVEC (struct value *, allocated_args);
- old_cleanups = make_cleanup (free_current_contents, &val_args);
+ std::vector<struct value *> val_args;
if (s == 0)
error_no_arg (_("format-control string and values to print"));
if (*s++ != '"')
error (_("Bad format string, missing '\"'."));
- fpieces = parse_format_string (&s);
-
- make_cleanup (free_format_pieces_cleanup, &fpieces);
+ format_pieces fpieces (&s);
if (*s++ != '"')
error (_("Bad format string, non-terminated '\"'."));
s = skip_spaces (s);
{
- int nargs = 0;
int nargs_wanted;
- int i, fr;
- char *current_substring;
+ int i;
+ const char *current_substring;
nargs_wanted = 0;
- for (fr = 0; fpieces[fr].string != NULL; fr++)
- if (fpieces[fr].argclass != literal_piece)
+ for (auto &&piece : fpieces)
+ if (piece.argclass != literal_piece)
++nargs_wanted;
/* Now, parse all arguments and evaluate them.
{
const char *s1;
- if (nargs == allocated_args)
- val_args = (struct value **) xrealloc ((char *) val_args,
- (allocated_args *= 2)
- * sizeof (struct value *));
s1 = s;
- val_args[nargs] = parse_to_comma_and_eval (&s1);
+ val_args.push_back (parse_to_comma_and_eval (&s1));
- nargs++;
s = s1;
if (*s == ',')
s++;
}
- if (nargs != nargs_wanted)
+ if (val_args.size () != nargs_wanted)
error (_("Wrong number of arguments for specified format-string"));
/* Now actually print them. */
i = 0;
- for (fr = 0; fpieces[fr].string != NULL; fr++)
+ for (auto &&piece : fpieces)
{
- current_substring = fpieces[fr].string;
- switch (fpieces[fr].argclass)
+ current_substring = piece.string;
+ switch (piece.argclass)
{
case string_arg:
printf_c_string (stream, current_substring, val_args[i]);
case dec64float_arg:
case dec128float_arg:
printf_floating (stream, current_substring, val_args[i],
- fpieces[fr].argclass);
+ piece.argclass);
break;
case ptr_arg:
printf_pointer (stream, current_substring, val_args[i]);
_("failed internal consistency check"));
}
/* Maybe advance to the next argument. */
- if (fpieces[fr].argclass != literal_piece)
+ if (piece.argclass != literal_piece)
++i;
}
}
- do_cleanups (old_cleanups);
}
/* Implement the "printf" command. */
static void
-printf_command (char *arg, int from_tty)
+printf_command (const char *arg, int from_tty)
{
ui_printf (arg, gdb_stdout);
gdb_flush (gdb_stdout);
/* Implement the "eval" command. */
static void
-eval_command (char *arg, int from_tty)
+eval_command (const char *arg, int from_tty)
{
string_file stb;
std::string expanded = insert_user_defined_cmd_args (stb.c_str ());
- execute_command (&expanded[0], from_tty);
+ execute_command (expanded.c_str (), from_tty);
}
void
current_display_number = -1;
- observer_attach_free_objfile (clear_dangling_display_expressions);
+ gdb::observers::free_objfile.attach (clear_dangling_display_expressions);
add_info ("address", info_address_command,
_("Describe where symbol SYM is stored."));
Do \"info display\" to see current list of code numbers."), &deletelist);
add_com ("printf", class_vars, printf_command, _("\
-printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
-This is useful for formatted output in user-defined commands."));
+Formatted printing, like the C \"printf\" function.\n\
+Usage: printf \"format string\", arg1, arg2, arg3, ..., argn\n\
+This supports most C printf format specifications, like %s, %d, etc."));
add_com ("output", class_vars, output_command, _("\
Like \"print\" but don't put in value history and don't print newline.\n\
You can see these environment settings with the \"show\" command."),
&setlist, "set ", 1, &cmdlist);
if (dbx_commands)
- add_com ("assign", class_vars, non_const_set_command, _("\
+ add_com ("assign", class_vars, set_command, _("\
Evaluate expression EXP and assign result to variable VAR, using assignment\n\
syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
example). VAR may be a debugger \"convenience\" variable (names starting\n\
variable in the program being debugged. EXP is any valid expression.\n\
This may usually be abbreviated to simply \"set\"."),
&setlist);
+ add_alias_cmd ("var", "variable", class_vars, 0, &setlist);
c = add_com ("print", class_vars, print_command, _("\
Print value of expression EXP.\n\
projects / deliverable / binutils-gdb.git / blobdiff