blob: 556614996b8bc14a804c105e210ebfe80c010b4f [file] [log] [blame]
/* General utility routines for GDB, the GNU debugger.
Copyright (C) 1986, 1988-2012 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "dyn-string.h"
#include "gdb_assert.h"
#include <ctype.h>
#include "gdb_string.h"
#include "gdb_wait.h"
#include "event-top.h"
#include "exceptions.h"
#include "gdbthread.h"
#include "fnmatch.h"
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif /* HAVE_SYS_RESOURCE_H */
#ifdef TUI
#include "tui/tui.h" /* For tui_get_command_dimension. */
#endif
#ifdef __GO32__
#include <pc.h>
#endif
/* SunOS's curses.h has a '#define reg register' in it. Thank you Sun. */
#ifdef reg
#undef reg
#endif
#include <signal.h>
#include "timeval-utils.h"
#include "gdbcmd.h"
#include "serial.h"
#include "bfd.h"
#include "target.h"
#include "gdb-demangle.h"
#include "expression.h"
#include "language.h"
#include "charset.h"
#include "annotate.h"
#include "filenames.h"
#include "symfile.h"
#include "gdb_obstack.h"
#include "gdbcore.h"
#include "top.h"
#include "main.h"
#include "solist.h"
#include "inferior.h" /* for signed_pointer_to_address */
#include <sys/param.h> /* For MAXPATHLEN */
#include "gdb_curses.h"
#include "readline/readline.h"
#include <sys/time.h>
#include <time.h>
#include "gdb_usleep.h"
#include "interps.h"
#include "gdb_regex.h"
#if !HAVE_DECL_MALLOC
extern PTR malloc (); /* ARI: PTR */
#endif
#if !HAVE_DECL_REALLOC
extern PTR realloc (); /* ARI: PTR */
#endif
#if !HAVE_DECL_FREE
extern void free ();
#endif
/* readline defines this. */
#undef savestring
void (*deprecated_error_begin_hook) (void);
/* Prototypes for local functions */
static void vfprintf_maybe_filtered (struct ui_file *, const char *,
va_list, int) ATTRIBUTE_PRINTF (2, 0);
static void fputs_maybe_filtered (const char *, struct ui_file *, int);
static void prompt_for_continue (void);
static void set_screen_size (void);
static void set_width (void);
/* A flag indicating whether to timestamp debugging messages. */
static int debug_timestamp = 0;
/* Nonzero if we have job control. */
int job_control;
/* Nonzero means a quit has been requested. */
int quit_flag;
/* Nonzero means quit immediately if Control-C is typed now, rather
than waiting until QUIT is executed. Be careful in setting this;
code which executes with immediate_quit set has to be very careful
about being able to deal with being interrupted at any time. It is
almost always better to use QUIT; the only exception I can think of
is being able to quit out of a system call (using EINTR loses if
the SIGINT happens between the previous QUIT and the system call).
To immediately quit in the case in which a SIGINT happens between
the previous QUIT and setting immediate_quit (desirable anytime we
expect to block), call QUIT after setting immediate_quit. */
int immediate_quit;
/* Nonzero means that strings with character values >0x7F should be printed
as octal escapes. Zero means just print the value (e.g. it's an
international character, and the terminal or window can cope.) */
int sevenbit_strings = 0;
static void
show_sevenbit_strings (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
fprintf_filtered (file, _("Printing of 8-bit characters "
"in strings as \\nnn is %s.\n"),
value);
}
/* String to be printed before error messages, if any. */
char *error_pre_print;
/* String to be printed before quit messages, if any. */
char *quit_pre_print;
/* String to be printed before warning messages, if any. */
char *warning_pre_print = "\nwarning: ";
int pagination_enabled = 1;
static void
show_pagination_enabled (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
fprintf_filtered (file, _("State of pagination is %s.\n"), value);
}
/* Cleanup utilities.
These are not defined in cleanups.c (nor declared in cleanups.h)
because while they use the "cleanup API" they are not part of the
"cleanup API". */
static void
do_freeargv (void *arg)
{
freeargv ((char **) arg);
}
struct cleanup *
make_cleanup_freeargv (char **arg)
{
return make_cleanup (do_freeargv, arg);
}
static void
do_dyn_string_delete (void *arg)
{
dyn_string_delete ((dyn_string_t) arg);
}
struct cleanup *
make_cleanup_dyn_string_delete (dyn_string_t arg)
{
return make_cleanup (do_dyn_string_delete, arg);
}
static void
do_bfd_close_cleanup (void *arg)
{
bfd_close (arg);
}
struct cleanup *
make_cleanup_bfd_close (bfd *abfd)
{
return make_cleanup (do_bfd_close_cleanup, abfd);
}
static void
do_close_cleanup (void *arg)
{
int *fd = arg;
close (*fd);
}
struct cleanup *
make_cleanup_close (int fd)
{
int *saved_fd = xmalloc (sizeof (fd));
*saved_fd = fd;
return make_cleanup_dtor (do_close_cleanup, saved_fd, xfree);
}
/* Helper function which does the work for make_cleanup_fclose. */
static void
do_fclose_cleanup (void *arg)
{
FILE *file = arg;
fclose (file);
}
/* Return a new cleanup that closes FILE. */
struct cleanup *
make_cleanup_fclose (FILE *file)
{
return make_cleanup (do_fclose_cleanup, file);
}
/* Helper function which does the work for make_cleanup_obstack_free. */
static void
do_obstack_free (void *arg)
{
struct obstack *ob = arg;
obstack_free (ob, NULL);
}
/* Return a new cleanup that frees OBSTACK. */
struct cleanup *
make_cleanup_obstack_free (struct obstack *obstack)
{
return make_cleanup (do_obstack_free, obstack);
}
static void
do_ui_file_delete (void *arg)
{
ui_file_delete (arg);
}
struct cleanup *
make_cleanup_ui_file_delete (struct ui_file *arg)
{
return make_cleanup (do_ui_file_delete, arg);
}
/* Helper function for make_cleanup_ui_out_redirect_pop. */
static void
do_ui_out_redirect_pop (void *arg)
{
struct ui_out *uiout = arg;
if (ui_out_redirect (uiout, NULL) < 0)
warning (_("Cannot restore redirection of the current output protocol"));
}
/* Return a new cleanup that pops the last redirection by ui_out_redirect
with NULL parameter. */
struct cleanup *
make_cleanup_ui_out_redirect_pop (struct ui_out *uiout)
{
return make_cleanup (do_ui_out_redirect_pop, uiout);
}
static void
do_free_section_addr_info (void *arg)
{
free_section_addr_info (arg);
}
struct cleanup *
make_cleanup_free_section_addr_info (struct section_addr_info *addrs)
{
return make_cleanup (do_free_section_addr_info, addrs);
}
struct restore_integer_closure
{
int *variable;
int value;
};
static void
restore_integer (void *p)
{
struct restore_integer_closure *closure = p;
*(closure->variable) = closure->value;
}
/* Remember the current value of *VARIABLE and make it restored when
the cleanup is run. */
struct cleanup *
make_cleanup_restore_integer (int *variable)
{
struct restore_integer_closure *c =
xmalloc (sizeof (struct restore_integer_closure));
c->variable = variable;
c->value = *variable;
return make_cleanup_dtor (restore_integer, (void *) c, xfree);
}
/* Remember the current value of *VARIABLE and make it restored when
the cleanup is run. */
struct cleanup *
make_cleanup_restore_uinteger (unsigned int *variable)
{
return make_cleanup_restore_integer ((int *) variable);
}
/* Helper for make_cleanup_unpush_target. */
static void
do_unpush_target (void *arg)
{
struct target_ops *ops = arg;
unpush_target (ops);
}
/* Return a new cleanup that unpushes OPS. */
struct cleanup *
make_cleanup_unpush_target (struct target_ops *ops)
{
return make_cleanup (do_unpush_target, ops);
}
/* Helper for make_cleanup_htab_delete compile time checking the types. */
static void
do_htab_delete_cleanup (void *htab_voidp)
{
htab_t htab = htab_voidp;
htab_delete (htab);
}
/* Return a new cleanup that deletes HTAB. */
struct cleanup *
make_cleanup_htab_delete (htab_t htab)
{
return make_cleanup (do_htab_delete_cleanup, htab);
}
struct restore_ui_file_closure
{
struct ui_file **variable;
struct ui_file *value;
};
static void
do_restore_ui_file (void *p)
{
struct restore_ui_file_closure *closure = p;
*(closure->variable) = closure->value;
}
/* Remember the current value of *VARIABLE and make it restored when
the cleanup is run. */
struct cleanup *
make_cleanup_restore_ui_file (struct ui_file **variable)
{
struct restore_ui_file_closure *c = XNEW (struct restore_ui_file_closure);
c->variable = variable;
c->value = *variable;
return make_cleanup_dtor (do_restore_ui_file, (void *) c, xfree);
}
/* Helper for make_cleanup_value_free_to_mark. */
static void
do_value_free_to_mark (void *value)
{
value_free_to_mark ((struct value *) value);
}
/* Free all values allocated since MARK was obtained by value_mark
(except for those released) when the cleanup is run. */
struct cleanup *
make_cleanup_value_free_to_mark (struct value *mark)
{
return make_cleanup (do_value_free_to_mark, mark);
}
/* Helper for make_cleanup_value_free. */
static void
do_value_free (void *value)
{
value_free (value);
}
/* Free VALUE. */
struct cleanup *
make_cleanup_value_free (struct value *value)
{
return make_cleanup (do_value_free, value);
}
/* Helper for make_cleanup_free_so. */
static void
do_free_so (void *arg)
{
struct so_list *so = arg;
free_so (so);
}
/* Make cleanup handler calling free_so for SO. */
struct cleanup *
make_cleanup_free_so (struct so_list *so)
{
return make_cleanup (do_free_so, so);
}
/* This function is useful for cleanups.
Do
foo = xmalloc (...);
old_chain = make_cleanup (free_current_contents, &foo);
to arrange to free the object thus allocated. */
void
free_current_contents (void *ptr)
{
void **location = ptr;
if (location == NULL)
internal_error (__FILE__, __LINE__,
_("free_current_contents: NULL pointer"));
if (*location != NULL)
{
xfree (*location);
*location = NULL;
}
}
/* If nonzero, display time usage both at startup and for each command. */
static int display_time;
/* If nonzero, display space usage both at startup and for each command. */
static int display_space;
/* Records a run time and space usage to be used as a base for
reporting elapsed time or change in space. In addition,
the msg_type field indicates whether the saved time is from the
beginning of GDB execution (0) or the beginning of an individual
command execution (1). */
struct cmd_stats
{
int msg_type;
long start_cpu_time;
struct timeval start_wall_time;
long start_space;
};
/* Set whether to display time statistics to NEW_VALUE (non-zero
means true). */
void
set_display_time (int new_value)
{
display_time = new_value;
}
/* Set whether to display space statistics to NEW_VALUE (non-zero
means true). */
void
set_display_space (int new_value)
{
display_space = new_value;
}
/* As indicated by display_time and display_space, report GDB's elapsed time
and space usage from the base time and space provided in ARG, which
must be a pointer to a struct cmd_stat. This function is intended
to be called as a cleanup. */
static void
report_command_stats (void *arg)
{
struct cmd_stats *start_stats = (struct cmd_stats *) arg;
int msg_type = start_stats->msg_type;
if (display_time)
{
long cmd_time = get_run_time () - start_stats->start_cpu_time;
struct timeval now_wall_time, delta_wall_time;
gettimeofday (&now_wall_time, NULL);
timeval_sub (&delta_wall_time,
&now_wall_time, &start_stats->start_wall_time);
printf_unfiltered (msg_type == 0
? _("Startup time: %ld.%06ld (cpu), %ld.%06ld (wall)\n")
: _("Command execution time: %ld.%06ld (cpu), %ld.%06ld (wall)\n"),
cmd_time / 1000000, cmd_time % 1000000,
(long) delta_wall_time.tv_sec,
(long) delta_wall_time.tv_usec);
}
if (display_space)
{
#ifdef HAVE_SBRK
char *lim = (char *) sbrk (0);
long space_now = lim - lim_at_start;
long space_diff = space_now - start_stats->start_space;
printf_unfiltered (msg_type == 0
? _("Space used: %ld (%s%ld during startup)\n")
: _("Space used: %ld (%s%ld for this command)\n"),
space_now,
(space_diff >= 0 ? "+" : ""),
space_diff);
#endif
}
}
/* Create a cleanup that reports time and space used since its
creation. Precise messages depend on MSG_TYPE:
0: Initial time/space
1: Individual command time/space. */
struct cleanup *
make_command_stats_cleanup (int msg_type)
{
struct cmd_stats *new_stat = XMALLOC (struct cmd_stats);
#ifdef HAVE_SBRK
char *lim = (char *) sbrk (0);
new_stat->start_space = lim - lim_at_start;
#endif
new_stat->msg_type = msg_type;
new_stat->start_cpu_time = get_run_time ();
gettimeofday (&new_stat->start_wall_time, NULL);
return make_cleanup_dtor (report_command_stats, new_stat, xfree);
}
/* Print a warning message. The first argument STRING is the warning
message, used as an fprintf format string, the second is the
va_list of arguments for that string. A warning is unfiltered (not
paginated) so that the user does not need to page through each
screen full of warnings when there are lots of them. */
void
vwarning (const char *string, va_list args)
{
if (deprecated_warning_hook)
(*deprecated_warning_hook) (string, args);
else
{
target_terminal_ours ();
wrap_here (""); /* Force out any buffered output. */
gdb_flush (gdb_stdout);
if (warning_pre_print)
fputs_unfiltered (warning_pre_print, gdb_stderr);
vfprintf_unfiltered (gdb_stderr, string, args);
fprintf_unfiltered (gdb_stderr, "\n");
va_end (args);
}
}
/* Print a warning message.
The first argument STRING is the warning message, used as a fprintf string,
and the remaining args are passed as arguments to it.
The primary difference between warnings and errors is that a warning
does not force the return to command level. */
void
warning (const char *string, ...)
{
va_list args;
va_start (args, string);
vwarning (string, args);
va_end (args);
}
/* Print an error message and return to command level.
The first argument STRING is the error message, used as a fprintf string,
and the remaining args are passed as arguments to it. */
void
verror (const char *string, va_list args)
{
throw_verror (GENERIC_ERROR, string, args);
}
void
error (const char *string, ...)
{
va_list args;
va_start (args, string);
throw_verror (GENERIC_ERROR, string, args);
va_end (args);
}
/* Print an error message and quit.
The first argument STRING is the error message, used as a fprintf string,
and the remaining args are passed as arguments to it. */
void
vfatal (const char *string, va_list args)
{
throw_vfatal (string, args);
}
void
fatal (const char *string, ...)
{
va_list args;
va_start (args, string);
throw_vfatal (string, args);
va_end (args);
}
void
error_stream (struct ui_file *stream)
{
char *message = ui_file_xstrdup (stream, NULL);
make_cleanup (xfree, message);
error (("%s"), message);
}
/* Dump core trying to increase the core soft limit to hard limit first. */
static void
dump_core (void)
{
#ifdef HAVE_SETRLIMIT
struct rlimit rlim = { RLIM_INFINITY, RLIM_INFINITY };
setrlimit (RLIMIT_CORE, &rlim);
#endif /* HAVE_SETRLIMIT */
abort (); /* NOTE: GDB has only three calls to abort(). */
}
/* Check whether GDB will be able to dump core using the dump_core
function. */
static int
can_dump_core (const char *reason)
{
#ifdef HAVE_GETRLIMIT
struct rlimit rlim;
/* Be quiet and assume we can dump if an error is returned. */
if (getrlimit (RLIMIT_CORE, &rlim) != 0)
return 1;
if (rlim.rlim_max == 0)
{
fprintf_unfiltered (gdb_stderr,
_("%s\nUnable to dump core, use `ulimit -c"
" unlimited' before executing GDB next time.\n"),
reason);
return 0;
}
#endif /* HAVE_GETRLIMIT */
return 1;
}
/* Allow the user to configure the debugger behavior with respect to
what to do when an internal problem is detected. */
const char internal_problem_ask[] = "ask";
const char internal_problem_yes[] = "yes";
const char internal_problem_no[] = "no";
static const char *const internal_problem_modes[] =
{
internal_problem_ask,
internal_problem_yes,
internal_problem_no,
NULL
};
/* Print a message reporting an internal error/warning. Ask the user
if they want to continue, dump core, or just exit. Return
something to indicate a quit. */
struct internal_problem
{
const char *name;
const char *should_quit;
const char *should_dump_core;
};
/* Report a problem, internal to GDB, to the user. Once the problem
has been reported, and assuming GDB didn't quit, the caller can
either allow execution to resume or throw an error. */
static void ATTRIBUTE_PRINTF (4, 0)
internal_vproblem (struct internal_problem *problem,
const char *file, int line, const char *fmt, va_list ap)
{
static int dejavu;
int quit_p;
int dump_core_p;
char *reason;
/* Don't allow infinite error/warning recursion. */
{
static char msg[] = "Recursive internal problem.\n";
switch (dejavu)
{
case 0:
dejavu = 1;
break;
case 1:
dejavu = 2;
fputs_unfiltered (msg, gdb_stderr);
abort (); /* NOTE: GDB has only three calls to abort(). */
default:
dejavu = 3;
/* Newer GLIBC versions put the warn_unused_result attribute
on write, but this is one of those rare cases where
ignoring the return value is correct. Casting to (void)
does not fix this problem. This is the solution suggested
at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509. */
if (write (STDERR_FILENO, msg, sizeof (msg)) != sizeof (msg))
abort (); /* NOTE: GDB has only three calls to abort(). */
exit (1);
}
}
/* Try to get the message out and at the start of a new line. */
target_terminal_ours ();
begin_line ();
/* Create a string containing the full error/warning message. Need
to call query with this full string, as otherwize the reason
(error/warning) and question become separated. Format using a
style similar to a compiler error message. Include extra detail
so that the user knows that they are living on the edge. */
{
char *msg;
msg = xstrvprintf (fmt, ap);
reason = xstrprintf ("%s:%d: %s: %s\n"
"A problem internal to GDB has been detected,\n"
"further debugging may prove unreliable.",
file, line, problem->name, msg);
xfree (msg);
make_cleanup (xfree, reason);
}
if (problem->should_quit == internal_problem_ask)
{
/* Default (yes/batch case) is to quit GDB. When in batch mode
this lessens the likelihood of GDB going into an infinite
loop. */
if (!confirm)
{
/* Emit the message and quit. */
fputs_unfiltered (reason, gdb_stderr);
fputs_unfiltered ("\n", gdb_stderr);
quit_p = 1;
}
else
quit_p = query (_("%s\nQuit this debugging session? "), reason);
}
else if (problem->should_quit == internal_problem_yes)
quit_p = 1;
else if (problem->should_quit == internal_problem_no)
quit_p = 0;
else
internal_error (__FILE__, __LINE__, _("bad switch"));
if (problem->should_dump_core == internal_problem_ask)
{
if (!can_dump_core (reason))
dump_core_p = 0;
else
{
/* Default (yes/batch case) is to dump core. This leaves a GDB
`dropping' so that it is easier to see that something went
wrong in GDB. */
dump_core_p = query (_("%s\nCreate a core file of GDB? "), reason);
}
}
else if (problem->should_dump_core == internal_problem_yes)
dump_core_p = can_dump_core (reason);
else if (problem->should_dump_core == internal_problem_no)
dump_core_p = 0;
else
internal_error (__FILE__, __LINE__, _("bad switch"));
if (quit_p)
{
if (dump_core_p)
dump_core ();
else
exit (1);
}
else
{
if (dump_core_p)
{
#ifdef HAVE_WORKING_FORK
if (fork () == 0)
dump_core ();
#endif
}
}
dejavu = 0;
}
static struct internal_problem internal_error_problem = {
"internal-error", internal_problem_ask, internal_problem_ask
};
void
internal_verror (const char *file, int line, const char *fmt, va_list ap)
{
internal_vproblem (&internal_error_problem, file, line, fmt, ap);
deprecated_throw_reason (RETURN_ERROR);
}
void
internal_error (const char *file, int line, const char *string, ...)
{
va_list ap;
va_start (ap, string);
internal_verror (file, line, string, ap);
va_end (ap);
}
static struct internal_problem internal_warning_problem = {
"internal-warning", internal_problem_ask, internal_problem_ask
};
void
internal_vwarning (const char *file, int line, const char *fmt, va_list ap)
{
internal_vproblem (&internal_warning_problem, file, line, fmt, ap);
}
void
internal_warning (const char *file, int line, const char *string, ...)
{
va_list ap;
va_start (ap, string);
internal_vwarning (file, line, string, ap);
va_end (ap);
}
/* Dummy functions to keep add_prefix_cmd happy. */
static void
set_internal_problem_cmd (char *args, int from_tty)
{
}
static void
show_internal_problem_cmd (char *args, int from_tty)
{
}
/* When GDB reports an internal problem (error or warning) it gives
the user the opportunity to quit GDB and/or create a core file of
the current debug session. This function registers a few commands
that make it possible to specify that GDB should always or never
quit or create a core file, without asking. The commands look
like:
maint set PROBLEM-NAME quit ask|yes|no
maint show PROBLEM-NAME quit
maint set PROBLEM-NAME corefile ask|yes|no
maint show PROBLEM-NAME corefile
Where PROBLEM-NAME is currently "internal-error" or
"internal-warning". */
static void
add_internal_problem_command (struct internal_problem *problem)
{
struct cmd_list_element **set_cmd_list;
struct cmd_list_element **show_cmd_list;
char *set_doc;
char *show_doc;
set_cmd_list = xmalloc (sizeof (*set_cmd_list));
show_cmd_list = xmalloc (sizeof (*set_cmd_list));
*set_cmd_list = NULL;
*show_cmd_list = NULL;
set_doc = xstrprintf (_("Configure what GDB does when %s is detected."),
problem->name);
show_doc = xstrprintf (_("Show what GDB does when %s is detected."),
problem->name);
add_prefix_cmd ((char*) problem->name,
class_maintenance, set_internal_problem_cmd, set_doc,
set_cmd_list,
concat ("maintenance set ", problem->name, " ",
(char *) NULL),
0/*allow-unknown*/, &maintenance_set_cmdlist);
add_prefix_cmd ((char*) problem->name,
class_maintenance, show_internal_problem_cmd, show_doc,
show_cmd_list,
concat ("maintenance show ", problem->name, " ",
(char *) NULL),
0/*allow-unknown*/, &maintenance_show_cmdlist);
set_doc = xstrprintf (_("Set whether GDB should quit "
"when an %s is detected"),
problem->name);
show_doc = xstrprintf (_("Show whether GDB will quit "
"when an %s is detected"),
problem->name);
add_setshow_enum_cmd ("quit", class_maintenance,
internal_problem_modes,
&problem->should_quit,
set_doc,
show_doc,
NULL, /* help_doc */
NULL, /* setfunc */
NULL, /* showfunc */
set_cmd_list,
show_cmd_list);
xfree (set_doc);
xfree (show_doc);
set_doc = xstrprintf (_("Set whether GDB should create a core "
"file of GDB when %s is detected"),
problem->name);
show_doc = xstrprintf (_("Show whether GDB will create a core "
"file of GDB when %s is detected"),
problem->name);
add_setshow_enum_cmd ("corefile", class_maintenance,
internal_problem_modes,
&problem->should_dump_core,
set_doc,
show_doc,
NULL, /* help_doc */
NULL, /* setfunc */
NULL, /* showfunc */
set_cmd_list,
show_cmd_list);
xfree (set_doc);
xfree (show_doc);
}
/* Print the system error message for errno, and also mention STRING
as the file name for which the error was encountered.
Then return to command level. */
void
perror_with_name (const char *string)
{
char *err;
char *combined;
err = safe_strerror (errno);
combined = (char *) alloca (strlen (err) + strlen (string) + 3);
strcpy (combined, string);
strcat (combined, ": ");
strcat (combined, err);
/* I understand setting these is a matter of taste. Still, some people
may clear errno but not know about bfd_error. Doing this here is not
unreasonable. */
bfd_set_error (bfd_error_no_error);
errno = 0;
error (_("%s."), combined);
}
/* Print the system error message for ERRCODE, and also mention STRING
as the file name for which the error was encountered. */
void
print_sys_errmsg (const char *string, int errcode)
{
char *err;
char *combined;
err = safe_strerror (errcode);
combined = (char *) alloca (strlen (err) + strlen (string) + 3);
strcpy (combined, string);
strcat (combined, ": ");
strcat (combined, err);
/* We want anything which was printed on stdout to come out first, before
this message. */
gdb_flush (gdb_stdout);
fprintf_unfiltered (gdb_stderr, "%s.\n", combined);
}
/* Control C eventually causes this to be called, at a convenient time. */
void
quit (void)
{
#ifdef __MSDOS__
/* No steenking SIGINT will ever be coming our way when the
program is resumed. Don't lie. */
fatal ("Quit");
#else
if (job_control
/* If there is no terminal switching for this target, then we can't
possibly get screwed by the lack of job control. */
|| current_target.to_terminal_ours == NULL)
fatal ("Quit");
else
fatal ("Quit (expect signal SIGINT when the program is resumed)");
#endif
}
/* Called when a memory allocation fails, with the number of bytes of
memory requested in SIZE. */
void
malloc_failure (long size)
{
if (size > 0)
{
internal_error (__FILE__, __LINE__,
_("virtual memory exhausted: can't allocate %ld bytes."),
size);
}
else
{
internal_error (__FILE__, __LINE__, _("virtual memory exhausted."));
}
}
/* My replacement for the read system call.
Used like `read' but keeps going if `read' returns too soon. */
int
myread (int desc, char *addr, int len)
{
int val;
int orglen = len;
while (len > 0)
{
val = read (desc, addr, len);
if (val < 0)
return val;
if (val == 0)
return orglen - len;
len -= val;
addr += val;
}
return orglen;
}
/* Make a copy of the string at PTR with SIZE characters
(and add a null character at the end in the copy).
Uses malloc to get the space. Returns the address of the copy. */
char *
savestring (const char *ptr, size_t size)
{
char *p = (char *) xmalloc (size + 1);
memcpy (p, ptr, size);
p[size] = 0;
return p;
}
void
print_spaces (int n, struct ui_file *file)
{
fputs_unfiltered (n_spaces (n), file);
}
/* Print a host address. */
void
gdb_print_host_address (const void *addr, struct ui_file *stream)
{
fprintf_filtered (stream, "%s", host_address_to_string (addr));
}
/* A cleanup function that calls regfree. */
static void
do_regfree_cleanup (void *r)
{
regfree (r);
}
/* Create a new cleanup that frees the compiled regular expression R. */
struct cleanup *
make_regfree_cleanup (regex_t *r)
{
return make_cleanup (do_regfree_cleanup, r);
}
/* Return an xmalloc'd error message resulting from a regular
expression compilation failure. */
char *
get_regcomp_error (int code, regex_t *rx)
{
size_t length = regerror (code, rx, NULL, 0);
char *result = xmalloc (length);
regerror (code, rx, result, length);
return result;
}
/* This function supports the query, nquery, and yquery functions.
Ask user a y-or-n question and return 0 if answer is no, 1 if
answer is yes, or default the answer to the specified default
(for yquery or nquery). DEFCHAR may be 'y' or 'n' to provide a
default answer, or '\0' for no default.
CTLSTR is the control string and should end in "? ". It should
not say how to answer, because we do that.
ARGS are the arguments passed along with the CTLSTR argument to
printf. */
static int ATTRIBUTE_PRINTF (1, 0)
defaulted_query (const char *ctlstr, const char defchar, va_list args)
{
int answer;
int ans2;
int retval;
int def_value;
char def_answer, not_def_answer;
char *y_string, *n_string, *question;
/* Set up according to which answer is the default. */
if (defchar == '\0')
{
def_value = 1;
def_answer = 'Y';
not_def_answer = 'N';
y_string = "y";
n_string = "n";
}
else if (defchar == 'y')
{
def_value = 1;
def_answer = 'Y';
not_def_answer = 'N';
y_string = "[y]";
n_string = "n";
}
else
{
def_value = 0;
def_answer = 'N';
not_def_answer = 'Y';
y_string = "y";
n_string = "[n]";
}
/* Automatically answer the default value if the user did not want
prompts or the command was issued with the server prefix. */
if (!confirm || server_command)
return def_value;
/* 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 ())
{
wrap_here ("");
vfprintf_filtered (gdb_stdout, ctlstr, args);
printf_filtered (_("(%s or %s) [answered %c; "
"input not from terminal]\n"),
y_string, n_string, def_answer);
gdb_flush (gdb_stdout);
return def_value;
}
if (deprecated_query_hook)
{
return deprecated_query_hook (ctlstr, args);
}
/* Format the question outside of the loop, to avoid reusing args. */
question = xstrvprintf (ctlstr, args);
while (1)
{
wrap_here (""); /* Flush any buffered output. */
gdb_flush (gdb_stdout);
if (annotation_level > 1)
printf_filtered (("\n\032\032pre-query\n"));
fputs_filtered (question, gdb_stdout);
printf_filtered (_("(%s or %s) "), y_string, n_string);
if (annotation_level > 1)
printf_filtered (("\n\032\032query\n"));
wrap_here ("");
gdb_flush (gdb_stdout);
answer = fgetc (stdin);
/* We expect fgetc to block until a character is read. But
this may not be the case if the terminal was opened with
the NONBLOCK flag. In that case, if there is nothing to
read on stdin, fgetc returns EOF, but also sets the error
condition flag on stdin and errno to EAGAIN. With a true
EOF, stdin's error condition flag is not set.
A situation where this behavior was observed is a pseudo
terminal on AIX. */
while (answer == EOF && ferror (stdin) && errno == EAGAIN)
{
/* Not a real EOF. Wait a little while and try again until
we read something. */
clearerr (stdin);
gdb_usleep (10000);
answer = fgetc (stdin);
}
clearerr (stdin); /* in case of C-d */
if (answer == EOF) /* C-d */
{
printf_filtered ("EOF [assumed %c]\n", def_answer);
retval = def_value;
break;
}
/* Eat rest of input line, to EOF or newline. */
if (answer != '\n')
do
{
ans2 = fgetc (stdin);
clearerr (stdin);
}
while (ans2 != EOF && ans2 != '\n' && ans2 != '\r');
if (answer >= 'a')
answer -= 040;
/* Check answer. For the non-default, the user must specify
the non-default explicitly. */
if (answer == not_def_answer)
{
retval = !def_value;
break;
}
/* Otherwise, if a default was specified, the user may either
specify the required input or have it default by entering
nothing. */
if (answer == def_answer
|| (defchar != '\0' &&
(answer == '\n' || answer == '\r' || answer == EOF)))
{
retval = def_value;
break;
}
/* Invalid entries are not defaulted and require another selection. */
printf_filtered (_("Please answer %s or %s.\n"),
y_string, n_string);
}
xfree (question);
if (annotation_level > 1)
printf_filtered (("\n\032\032post-query\n"));
return retval;
}
/* Ask user a y-or-n question and return 0 if answer is no, 1 if
answer is yes, or 0 if answer is defaulted.
Takes three args which are given to printf to print the question.
The first, a control string, should end in "? ".
It should not say how to answer, because we do that. */
int
nquery (const char *ctlstr, ...)
{
va_list args;
int ret;
va_start (args, ctlstr);
ret = defaulted_query (ctlstr, 'n', args);
va_end (args);
return ret;
}
/* Ask user a y-or-n question and return 0 if answer is no, 1 if
answer is yes, or 1 if answer is defaulted.
Takes three args which are given to printf to print the question.
The first, a control string, should end in "? ".
It should not say how to answer, because we do that. */
int
yquery (const char *ctlstr, ...)
{
va_list args;
int ret;
va_start (args, ctlstr);
ret = defaulted_query (ctlstr, 'y', args);
va_end (args);
return ret;
}
/* Ask user a y-or-n question and return 1 iff answer is yes.
Takes three args which are given to printf to print the question.
The first, a control string, should end in "? ".
It should not say how to answer, because we do that. */
int
query (const char *ctlstr, ...)
{
va_list args;
int ret;
va_start (args, ctlstr);
ret = defaulted_query (ctlstr, '\0', args);
va_end (args);
return ret;
}
/* A helper for parse_escape that converts a host character to a
target character. C is the host character. If conversion is
possible, then the target character is stored in *TARGET_C and the
function returns 1. Otherwise, the function returns 0. */
static int
host_char_to_target (struct gdbarch *gdbarch, int c, int *target_c)
{
struct obstack host_data;
char the_char = c;
struct cleanup *cleanups;
int result = 0;
obstack_init (&host_data);
cleanups = make_cleanup_obstack_free (&host_data);
convert_between_encodings (target_charset (gdbarch), host_charset (),
&the_char, 1, 1, &host_data, translit_none);
if (obstack_object_size (&host_data) == 1)
{
result = 1;
*target_c = *(char *) obstack_base (&host_data);
}
do_cleanups (cleanups);
return result;
}
/* Parse a C escape sequence. STRING_PTR points to a variable
containing a pointer to the string to parse. That pointer
should point to the character after the \. That pointer
is updated past the characters we use. The value of the
escape sequence is returned.
A negative value means the sequence \ newline was seen,
which is supposed to be equivalent to nothing at all.
If \ is followed by a null character, we return a negative
value and leave the string pointer pointing at the null character.
If \ is followed by 000, we return 0 and leave the string pointer
after the zeros. A value of 0 does not mean end of string. */
int
parse_escape (struct gdbarch *gdbarch, char **string_ptr)
{
int target_char = -2; /* Initialize to avoid GCC warnings. */
int c = *(*string_ptr)++;
switch (c)
{
case '\n':
return -2;
case 0:
(*string_ptr)--;
return 0;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
{
int i = host_hex_value (c);
int count = 0;
while (++count < 3)
{
c = (**string_ptr);
if (isdigit (c) && c != '8' && c != '9')
{
(*string_ptr)++;
i *= 8;
i += host_hex_value (c);
}
else
{
break;
}
}
return i;
}
case 'a':
c = '\a';
break;
case 'b':
c = '\b';
break;
case 'f':
c = '\f';
break;
case 'n':
c = '\n';
break;
case 'r':
c = '\r';
break;
case 't':
c = '\t';
break;
case 'v':
c = '\v';
break;
default:
break;
}
if (!host_char_to_target (gdbarch, c, &target_char))
error (_("The escape sequence `\\%c' is equivalent to plain `%c',"
" which has no equivalent\nin the `%s' character set."),
c, c, target_charset (gdbarch));
return target_char;
}
/* Print the character C on STREAM as part of the contents of a literal
string whose delimiter is QUOTER. Note that this routine should only
be call for printing things which are independent of the language
of the program being debugged. */
static void
printchar (int c, void (*do_fputs) (const char *, struct ui_file *),
void (*do_fprintf) (struct ui_file *, const char *, ...)
ATTRIBUTE_FPTR_PRINTF_2, struct ui_file *stream, int quoter)
{
c &= 0xFF; /* Avoid sign bit follies */
if (c < 0x20 || /* Low control chars */
(c >= 0x7F && c < 0xA0) || /* DEL, High controls */
(sevenbit_strings && c >= 0x80))
{ /* high order bit set */
switch (c)
{
case '\n':
do_fputs ("\\n", stream);
break;
case '\b':
do_fputs ("\\b", stream);
break;
case '\t':
do_fputs ("\\t", stream);
break;
case '\f':
do_fputs ("\\f", stream);
break;
case '\r':
do_fputs ("\\r", stream);
break;
case '\033':
do_fputs ("\\e", stream);
break;
case '\007':
do_fputs ("\\a", stream);
break;
default:
do_fprintf (stream, "\\%.3o", (unsigned int) c);
break;
}
}
else
{
if (c == '\\' || c == quoter)
do_fputs ("\\", stream);
do_fprintf (stream, "%c", c);
}
}
/* Print the character C on STREAM as part of the contents of a
literal string whose delimiter is QUOTER. Note that these routines
should only be call for printing things which are independent of
the language of the program being debugged. */
void
fputstr_filtered (const char *str, int quoter, struct ui_file *stream)
{
while (*str)
printchar (*str++, fputs_filtered, fprintf_filtered, stream, quoter);
}
void
fputstr_unfiltered (const char *str, int quoter, struct ui_file *stream)
{
while (*str)
printchar (*str++, fputs_unfiltered, fprintf_unfiltered, stream, quoter);
}
void
fputstrn_filtered (const char *str, int n, int quoter,
struct ui_file *stream)
{
int i;
for (i = 0; i < n; i++)
printchar (str[i], fputs_filtered, fprintf_filtered, stream, quoter);
}
void
fputstrn_unfiltered (const char *str, int n, int quoter,
struct ui_file *stream)
{
int i;
for (i = 0; i < n; i++)
printchar (str[i], fputs_unfiltered, fprintf_unfiltered, stream, quoter);
}
/* Number of lines per page or UINT_MAX if paging is disabled. */
static unsigned int lines_per_page;
static void
show_lines_per_page (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
fprintf_filtered (file,
_("Number of lines gdb thinks are in a page is %s.\n"),
value);
}
/* Number of chars per line or UINT_MAX if line folding is disabled. */
static unsigned int chars_per_line;
static void
show_chars_per_line (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
fprintf_filtered (file,
_("Number of characters gdb thinks "
"are in a line is %s.\n"),
value);
}
/* Current count of lines printed on this page, chars on this line. */
static unsigned int lines_printed, chars_printed;
/* Buffer and start column of buffered text, for doing smarter word-
wrapping. When someone calls wrap_here(), we start buffering output
that comes through fputs_filtered(). If we see a newline, we just
spit it out and forget about the wrap_here(). If we see another
wrap_here(), we spit it out and remember the newer one. If we see
the end of the line, we spit out a newline, the indent, and then
the buffered output. */
/* Malloc'd buffer with chars_per_line+2 bytes. Contains characters which
are waiting to be output (they have already been counted in chars_printed).
When wrap_buffer[0] is null, the buffer is empty. */
static char *wrap_buffer;
/* Pointer in wrap_buffer to the next character to fill. */
static char *wrap_pointer;
/* String to indent by if the wrap occurs. Must not be NULL if wrap_column
is non-zero. */
static char *wrap_indent;
/* Column number on the screen where wrap_buffer begins, or 0 if wrapping
is not in effect. */
static int wrap_column;
/* Inialize the number of lines per page and chars per line. */
void
init_page_info (void)
{
if (batch_flag)
{
lines_per_page = UINT_MAX;
chars_per_line = UINT_MAX;
}
else
#if defined(TUI)
if (!tui_get_command_dimension (&chars_per_line, &lines_per_page))
#endif
{
int rows, cols;
#if defined(__GO32__)
rows = ScreenRows ();
cols = ScreenCols ();
lines_per_page = rows;
chars_per_line = cols;
#else
/* Make sure Readline has initialized its terminal settings. */
rl_reset_terminal (NULL);
/* Get the screen size from Readline. */
rl_get_screen_size (&rows, &cols);
lines_per_page = rows;
chars_per_line = cols;
/* Readline should have fetched the termcap entry for us. */
if (tgetnum ("li") < 0 || getenv ("EMACS"))
{
/* The number of lines per page is not mentioned in the
terminal description. This probably means that paging is
not useful (e.g. emacs shell window), so disable paging. */
lines_per_page = UINT_MAX;
}
/* FIXME: Get rid of this junk. */
#if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
SIGWINCH_HANDLER (SIGWINCH);
#endif
/* If the output is not a terminal, don't paginate it. */
if (!ui_file_isatty (gdb_stdout))
lines_per_page = UINT_MAX;
#endif
}
set_screen_size ();
set_width ();
}
/* Helper for make_cleanup_restore_page_info. */
static void
do_restore_page_info_cleanup (void *arg)
{
set_screen_size ();
set_width ();
}
/* Provide cleanup for restoring the terminal size. */
struct cleanup *
make_cleanup_restore_page_info (void)
{
struct cleanup *back_to;
back_to = make_cleanup (do_restore_page_info_cleanup, NULL);
make_cleanup_restore_uinteger (&lines_per_page);
make_cleanup_restore_uinteger (&chars_per_line);
return back_to;
}
/* Temporarily set BATCH_FLAG and the associated unlimited terminal size.
Provide cleanup for restoring the original state. */
struct cleanup *
set_batch_flag_and_make_cleanup_restore_page_info (void)
{
struct cleanup *back_to = make_cleanup_restore_page_info ();
make_cleanup_restore_integer (&batch_flag);
batch_flag = 1;
init_page_info ();
return back_to;
}
/* Set the screen size based on LINES_PER_PAGE and CHARS_PER_LINE. */
static void
set_screen_size (void)
{
int rows = lines_per_page;
int cols = chars_per_line;
if (rows <= 0)
rows = INT_MAX;
if (cols <= 0)
cols = INT_MAX;
/* Update Readline's idea of the terminal size. */
rl_set_screen_size (rows, cols);
}
/* Reinitialize WRAP_BUFFER according to the current value of
CHARS_PER_LINE. */
static void
set_width (void)
{
if (chars_per_line == 0)
init_page_info ();
if (!wrap_buffer)
{
wrap_buffer = (char *) xmalloc (chars_per_line + 2);
wrap_buffer[0] = '\0';
}
else
wrap_buffer = (char *) xrealloc (wrap_buffer, chars_per_line + 2);
wrap_pointer = wrap_buffer; /* Start it at the beginning. */
}
static void
set_width_command (char *args, int from_tty, struct cmd_list_element *c)
{
set_screen_size ();
set_width ();
}
static void
set_height_command (char *args, int from_tty, struct cmd_list_element *c)
{
set_screen_size ();
}
/* Wait, so the user can read what's on the screen. Prompt the user
to continue by pressing RETURN. */
static void
prompt_for_continue (void)
{
char *ignore;
char cont_prompt[120];
if (annotation_level > 1)
printf_unfiltered (("\n\032\032pre-prompt-for-continue\n"));
strcpy (cont_prompt,
"---Type <return> to continue, or q <return> to quit---");
if (annotation_level > 1)
strcat (cont_prompt, "\n\032\032prompt-for-continue\n");
/* We must do this *before* we call gdb_readline, else it will eventually
call us -- thinking that we're trying to print beyond the end of the
screen. */
reinitialize_more_filter ();
immediate_quit++;
/* On a real operating system, the user can quit with SIGINT.
But not on GO32.
'q' is provided on all systems so users don't have to change habits
from system to system, and because telling them what to do in
the prompt is more user-friendly than expecting them to think of
SIGINT. */
/* Call readline, not gdb_readline, because GO32 readline handles control-C
whereas control-C to gdb_readline will cause the user to get dumped
out to DOS. */
ignore = gdb_readline_wrapper (cont_prompt);
if (annotation_level > 1)
printf_unfiltered (("\n\032\032post-prompt-for-continue\n"));
if (ignore)
{
char *p = ignore;
while (*p == ' ' || *p == '\t')
++p;
if (p[0] == 'q')
async_request_quit (0);
xfree (ignore);
}
immediate_quit--;
/* Now we have to do this again, so that GDB will know that it doesn't
need to save the ---Type <return>--- line at the top of the screen. */
reinitialize_more_filter ();
dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
}
/* Reinitialize filter; ie. tell it to reset to original values. */
void
reinitialize_more_filter (void)
{
lines_printed = 0;
chars_printed = 0;
}
/* Indicate that if the next sequence of characters overflows the line,
a newline should be inserted here rather than when it hits the end.
If INDENT is non-null, it is a string to be printed to indent the
wrapped part on the next line. INDENT must remain accessible until
the next call to wrap_here() or until a newline is printed through
fputs_filtered().
If the line is already overfull, we immediately print a newline and
the indentation, and disable further wrapping.
If we don't know the width of lines, but we know the page height,
we must not wrap words, but should still keep track of newlines
that were explicitly printed.
INDENT should not contain tabs, as that will mess up the char count
on the next line. FIXME.
This routine is guaranteed to force out any output which has been
squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be
used to force out output from the wrap_buffer. */
void
wrap_here (char *indent)
{
/* This should have been allocated, but be paranoid anyway. */
if (!wrap_buffer)
internal_error (__FILE__, __LINE__,
_("failed internal consistency check"));
if (wrap_buffer[0])
{
*wrap_pointer = '\0';
fputs_unfiltered (wrap_buffer, gdb_stdout);
}
wrap_pointer = wrap_buffer;
wrap_buffer[0] = '\0';
if (chars_per_line == UINT_MAX) /* No line overflow checking. */
{
wrap_column = 0;
}
else if (chars_printed >= chars_per_line)
{
puts_filtered ("\n");
if (indent != NULL)
puts_filtered (indent);
wrap_column = 0;
}
else
{
wrap_column = chars_printed;
if (indent == NULL)
wrap_indent = "";
else
wrap_indent = indent;
}
}
/* Print input string to gdb_stdout, filtered, with wrap,
arranging strings in columns of n chars. String can be
right or left justified in the column. Never prints
trailing spaces. String should never be longer than
width. FIXME: this could be useful for the EXAMINE
command, which currently doesn't tabulate very well. */
void
puts_filtered_tabular (char *string, int width, int right)
{
int spaces = 0;
int stringlen;
char *spacebuf;
gdb_assert (chars_per_line > 0);
if (chars_per_line == UINT_MAX)
{
fputs_filtered (string, gdb_stdout);
fputs_filtered ("\n", gdb_stdout);
return;
}
if (((chars_printed - 1) / width + 2) * width >= chars_per_line)
fputs_filtered ("\n", gdb_stdout);
if (width >= chars_per_line)
width = chars_per_line - 1;
stringlen = strlen (string);
if (chars_printed > 0)
spaces = width - (chars_printed - 1) % width - 1;
if (right)
spaces += width - stringlen;
spacebuf = alloca (spaces + 1);
spacebuf[spaces] = '\0';
while (spaces--)
spacebuf[spaces] = ' ';
fputs_filtered (spacebuf, gdb_stdout);
fputs_filtered (string, gdb_stdout);
}
/* Ensure that whatever gets printed next, using the filtered output
commands, starts at the beginning of the line. I.e. if there is
any pending output for the current line, flush it and start a new
line. Otherwise do nothing. */
void
begin_line (void)
{
if (chars_printed > 0)
{
puts_filtered ("\n");
}
}
/* Like fputs but if FILTER is true, pause after every screenful.
Regardless of FILTER can wrap at points other than the final
character of a line.
Unlike fputs, fputs_maybe_filtered does not return a value.
It is OK for LINEBUFFER to be NULL, in which case just don't print
anything.
Note that a longjmp to top level may occur in this routine (only if
FILTER is true) (since prompt_for_continue may do so) so this
routine should not be called when cleanups are not in place. */
static void
fputs_maybe_filtered (const char *linebuffer, struct ui_file *stream,
int filter)
{
const char *lineptr;
if (linebuffer == 0)
return;
/* Don't do any filtering if it is disabled. */
if (stream != gdb_stdout
|| !pagination_enabled
|| batch_flag
|| (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX)
|| top_level_interpreter () == NULL
|| ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ())))
{
fputs_unfiltered (linebuffer, stream);
return;
}
/* Go through and output each character. Show line extension
when this is necessary; prompt user for new page when this is
necessary. */
lineptr = linebuffer;
while (*lineptr)
{
/* Possible new page. */
if (filter && (lines_printed >= lines_per_page - 1))
prompt_for_continue ();
while (*lineptr && *lineptr != '\n')
{
/* Print a single line. */
if (*lineptr == '\t')
{
if (wrap_column)
*wrap_pointer++ = '\t';
else
fputc_unfiltered ('\t', stream);
/* Shifting right by 3 produces the number of tab stops
we have already passed, and then adding one and
shifting left 3 advances to the next tab stop. */
chars_printed = ((chars_printed >> 3) + 1) << 3;
lineptr++;
}
else
{
if (wrap_column)
*wrap_pointer++ = *lineptr;
else
fputc_unfiltered (*lineptr, stream);
chars_printed++;
lineptr++;
}
if (chars_printed >= chars_per_line)
{
unsigned int save_chars = chars_printed;
chars_printed = 0;
lines_printed++;
/* If we aren't actually wrapping, don't output newline --
if chars_per_line is right, we probably just overflowed
anyway; if it's wrong, let us keep going. */
if (wrap_column)
fputc_unfiltered ('\n', stream);
/* Possible new page. */
if (lines_printed >= lines_per_page - 1)
prompt_for_continue ();
/* Now output indentation and wrapped string. */
if (wrap_column)
{
fputs_unfiltered (wrap_indent, stream);
*wrap_pointer = '\0'; /* Null-terminate saved stuff, */
fputs_unfiltered (wrap_buffer, stream); /* and eject it. */
/* FIXME, this strlen is what prevents wrap_indent from
containing tabs. However, if we recurse to print it
and count its chars, we risk trouble if wrap_indent is
longer than (the user settable) chars_per_line.
Note also that this can set chars_printed > chars_per_line
if we are printing a long string. */
chars_printed = strlen (wrap_indent)
+ (save_chars - wrap_column);
wrap_pointer = wrap_buffer; /* Reset buffer */
wrap_buffer[0] = '\0';
wrap_column = 0; /* And disable fancy wrap */
}
}
}
if (*lineptr == '\n')
{
chars_printed = 0;
wrap_here ((char *) 0); /* Spit out chars, cancel
further wraps. */
lines_printed++;
fputc_unfiltered ('\n', stream);
lineptr++;
}
}
}
void
fputs_filtered (const char *linebuffer, struct ui_file *stream)
{
fputs_maybe_filtered (linebuffer, stream, 1);
}
int
putchar_unfiltered (int c)
{
char buf = c;
ui_file_write (gdb_stdout, &buf, 1);
return c;
}
/* Write character C to gdb_stdout using GDB's paging mechanism and return C.
May return nonlocally. */
int
putchar_filtered (int c)
{
return fputc_filtered (c, gdb_stdout);
}
int
fputc_unfiltered (int c, struct ui_file *stream)
{
char buf = c;
ui_file_write (stream, &buf, 1);
return c;
}
int
fputc_filtered (int c, struct ui_file *stream)
{
char buf[2];
buf[0] = c;
buf[1] = 0;
fputs_filtered (buf, stream);
return c;
}
/* puts_debug is like fputs_unfiltered, except it prints special
characters in printable fashion. */
void
puts_debug (char *prefix, char *string, char *suffix)
{
int ch;
/* Print prefix and suffix after each line. */
static int new_line = 1;
static int return_p = 0;
static char *prev_prefix = "";
static char *prev_suffix = "";
if (*string == '\n')
return_p = 0;
/* If the prefix is changing, print the previous suffix, a new line,
and the new prefix. */
if ((return_p || (strcmp (prev_prefix, prefix) != 0)) && !new_line)
{
fputs_unfiltered (prev_suffix, gdb_stdlog);
fputs_unfiltered ("\n", gdb_stdlog);
fputs_unfiltered (prefix, gdb_stdlog);
}
/* Print prefix if we printed a newline during the previous call. */
if (new_line)
{
new_line = 0;
fputs_unfiltered (prefix, gdb_stdlog);
}
prev_prefix = prefix;
prev_suffix = suffix;
/* Output characters in a printable format. */
while ((ch = *string++) != '\0')
{
switch (ch)
{
default:
if (isprint (ch))
fputc_unfiltered (ch, gdb_stdlog);
else
fprintf_unfiltered (gdb_stdlog, "\\x%02x", ch & 0xff);
break;
case '\\':
fputs_unfiltered ("\\\\", gdb_stdlog);
break;
case '\b':
fputs_unfiltered ("\\b", gdb_stdlog);
break;
case '\f':
fputs_unfiltered ("\\f", gdb_stdlog);
break;
case '\n':
new_line = 1;
fputs_unfiltered ("\\n", gdb_stdlog);
break;
case '\r':
fputs_unfiltered ("\\r", gdb_stdlog);
break;
case '\t':
fputs_unfiltered ("\\t", gdb_stdlog);
break;
case '\v':
fputs_unfiltered ("\\v", gdb_stdlog);
break;
}
return_p = ch == '\r';
}
/* Print suffix if we printed a newline. */
if (new_line)
{
fputs_unfiltered (suffix, gdb_stdlog);
fputs_unfiltered ("\n", gdb_stdlog);
}
}
/* Print a variable number of ARGS using format FORMAT. If this
information is going to put the amount written (since the last call
to REINITIALIZE_MORE_FILTER or the last page break) over the page size,
call prompt_for_continue to get the users permision to continue.
Unlike fprintf, this function does not return a value.
We implement three variants, vfprintf (takes a vararg list and stream),
fprintf (takes a stream to write on), and printf (the usual).
Note also that a longjmp to top level may occur in this routine
(since prompt_for_continue may do so) so this routine should not be
called when cleanups are not in place. */
static void
vfprintf_maybe_filtered (struct ui_file *stream, const char *format,
va_list args, int filter)
{
char *linebuffer;
struct cleanup *old_cleanups;
linebuffer = xstrvprintf (format, args);
old_cleanups = make_cleanup (xfree, linebuffer);
fputs_maybe_filtered (linebuffer, stream, filter);
do_cleanups (old_cleanups);
}
void
vfprintf_filtered (struct ui_file *stream, const char *format, va_list args)
{
vfprintf_maybe_filtered (stream, format, args, 1);
}
void
vfprintf_unfiltered (struct ui_file *stream, const char *format, va_list args)
{
char *linebuffer;
struct cleanup *old_cleanups;
linebuffer = xstrvprintf (format, args);
old_cleanups = make_cleanup (xfree, linebuffer);
if (debug_timestamp && stream == gdb_stdlog)
{
struct timeval tm;
char *timestamp;
int len, need_nl;
gettimeofday (&tm, NULL);
len = strlen (linebuffer);
need_nl = (len > 0 && linebuffer[len - 1] != '\n');
timestamp = xstrprintf ("%ld:%ld %s%s",
(long) tm.tv_sec, (long) tm.tv_usec,
linebuffer,
need_nl ? "\n": "");
make_cleanup (xfree, timestamp);
fputs_unfiltered (timestamp, stream);
}
else
fputs_unfiltered (linebuffer, stream);
do_cleanups (old_cleanups);
}
void
vprintf_filtered (const char *format, va_list args)
{
vfprintf_maybe_filtered (gdb_stdout, format, args, 1);
}
void
vprintf_unfiltered (const char *format, va_list args)
{
vfprintf_unfiltered (gdb_stdout, format, args);
}
void
fprintf_filtered (struct ui_file *stream, const char *format, ...)
{
va_list args;
va_start (args, format);
vfprintf_filtered (stream, format, args);
va_end (args);
}
void
fprintf_unfiltered (struct ui_file *stream, const char *format, ...)
{
va_list args;
va_start (args, format);
vfprintf_unfiltered (stream, format, args);
va_end (args);
}
/* Like fprintf_filtered, but prints its result indented.
Called as fprintfi_filtered (spaces, stream, format, ...); */
void
fprintfi_filtered (int spaces, struct ui_file *stream, const char *format,
...)
{
va_list args;
va_start (args, format);
print_spaces_filtered (spaces, stream);
vfprintf_filtered (stream, format, args);
va_end (args);
}
void
printf_filtered (const char *format, ...)
{
va_list args;
va_start (args, format);
vfprintf_filtered (gdb_stdout, format, args);
va_end (args);
}
void
printf_unfiltered (const char *format, ...)
{
va_list args;
va_start (args, format);
vfprintf_unfiltered (gdb_stdout, format, args);
va_end (args);
}
/* Like printf_filtered, but prints it's result indented.
Called as printfi_filtered (spaces, format, ...); */
void
printfi_filtered (int spaces, const char *format, ...)
{
va_list args;
va_start (args, format);
print_spaces_filtered (spaces, gdb_stdout);
vfprintf_filtered (gdb_stdout, format, args);
va_end (args);
}
/* Easy -- but watch out!
This routine is *not* a replacement for puts()! puts() appends a newline.
This one doesn't, and had better not! */
void
puts_filtered (const char *string)
{
fputs_filtered (string, gdb_stdout);
}
void
puts_unfiltered (const char *string)
{
fputs_unfiltered (string, gdb_stdout);
}
/* Return a pointer to N spaces and a null. The pointer is good
until the next call to here. */
char *
n_spaces (int n)
{
char *t;
static char *spaces = 0;
static int max_spaces = -1;
if (n > max_spaces)
{
if (spaces)
xfree (spaces);
spaces = (char *) xmalloc (n + 1);
for (t = spaces + n; t != spaces;)
*--t = ' ';
spaces[n] = '\0';
max_spaces = n;
}
return spaces + max_spaces - n;
}
/* Print N spaces. */
void
print_spaces_filtered (int n, struct ui_file *stream)
{
fputs_filtered (n_spaces (n), stream);
}
/* C++/ObjC demangler stuff. */
/* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language
LANG, using demangling args ARG_MODE, and print it filtered to STREAM.
If the name is not mangled, or the language for the name is unknown, or
demangling is off, the name is printed in its "raw" form. */
void
fprintf_symbol_filtered (struct ui_file *stream, const char *name,
enum language lang, int arg_mode)
{
char *demangled;
if (name != NULL)
{
/* If user wants to see raw output, no problem. */
if (!demangle)
{
fputs_filtered (name, stream);
}
else
{
demangled = language_demangle (language_def (lang), name, arg_mode);
fputs_filtered (demangled ? demangled : name, stream);
if (demangled != NULL)
{
xfree (demangled);
}
}
}
}
/* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
differences in whitespace. Returns 0 if they match, non-zero if they
don't (slightly different than strcmp()'s range of return values).
As an extra hack, string1=="FOO(ARGS)" matches string2=="FOO".
This "feature" is useful when searching for matching C++ function names
(such as if the user types 'break FOO', where FOO is a mangled C++
function). */
int
strcmp_iw (const char *string1, const char *string2)
{
while ((*string1 != '\0') && (*string2 != '\0'))
{
while (isspace (*string1))
{
string1++;
}
while (isspace (*string2))
{
string2++;
}
if (case_sensitivity == case_sensitive_on && *string1 != *string2)
break;
if (case_sensitivity == case_sensitive_off
&& (tolower ((unsigned char) *string1)
!= tolower ((unsigned char) *string2)))
break;
if (*string1 != '\0')
{
string1++;
string2++;
}
}
return (*string1 != '\0' && *string1 != '(') || (*string2 != '\0');
}
/* This is like strcmp except that it ignores whitespace and treats
'(' as the first non-NULL character in terms of ordering. Like
strcmp (and unlike strcmp_iw), it returns negative if STRING1 <
STRING2, 0 if STRING2 = STRING2, and positive if STRING1 > STRING2
according to that ordering.
If a list is sorted according to this function and if you want to
find names in the list that match some fixed NAME according to
strcmp_iw(LIST_ELT, NAME), then the place to start looking is right
where this function would put NAME.
This function must be neutral to the CASE_SENSITIVITY setting as the user
may choose it during later lookup. Therefore this function always sorts
primarily case-insensitively and secondarily case-sensitively.
Here are some examples of why using strcmp to sort is a bad idea:
Whitespace example:
Say your partial symtab contains: "foo<char *>", "goo". Then, if
we try to do a search for "foo<char*>", strcmp will locate this
after "foo<char *>" and before "goo". Then lookup_partial_symbol
will start looking at strings beginning with "goo", and will never
see the correct match of "foo<char *>".
Parenthesis example:
In practice, this is less like to be an issue, but I'll give it a
shot. Let's assume that '$' is a legitimate character to occur in
symbols. (Which may well even be the case on some systems.) Then
say that the partial symbol table contains "foo$" and "foo(int)".
strcmp will put them in this order, since '$' < '('. Now, if the
user searches for "foo", then strcmp will sort "foo" before "foo$".
Then lookup_partial_symbol will notice that strcmp_iw("foo$",
"foo") is false, so it won't proceed to the actual match of
"foo(int)" with "foo". */
int
strcmp_iw_ordered (const char *string1, const char *string2)
{
const char *saved_string1 = string1, *saved_string2 = string2;
enum case_sensitivity case_pass = case_sensitive_off;
for (;;)
{
/* C1 and C2 are valid only if *string1 != '\0' && *string2 != '\0'.
Provide stub characters if we are already at the end of one of the
strings. */
char c1 = 'X', c2 = 'X';
while (*string1 != '\0' && *string2 != '\0')
{
while (isspace (*string1))
string1++;
while (isspace (*string2))
string2++;
switch (case_pass)
{
case case_sensitive_off:
c1 = tolower ((unsigned char) *string1);
c2 = tolower ((unsigned char) *string2);
break;
case case_sensitive_on:
c1 = *string1;
c2 = *string2;
break;
}
if (c1 != c2)
break;
if (*string1 != '\0')
{
string1++;
string2++;
}
}
switch (*string1)
{
/* Characters are non-equal unless they're both '\0'; we want to
make sure we get the comparison right according to our
comparison in the cases where one of them is '\0' or '('. */
case '\0':
if (*string2 == '\0')
break;
else
return -1;
case '(':
if (*string2 == '\0')
return 1;
else
return -1;
default:
if (*string2 == '\0' || *string2 == '(')
return 1;
else if (c1 > c2)
return 1;
else if (c1 < c2)
return -1;
/* PASSTHRU */
}
if (case_pass == case_sensitive_on)
return 0;
/* Otherwise the strings were equal in case insensitive way, make
a more fine grained comparison in a case sensitive way. */
case_pass = case_sensitive_on;
string1 = saved_string1;
string2 = saved_string2;
}
}
/* A simple comparison function with opposite semantics to strcmp. */
int
streq (const char *lhs, const char *rhs)
{
return !strcmp (lhs, rhs);
}
/*
** subset_compare()
** Answer whether string_to_compare is a full or partial match to
** template_string. The partial match must be in sequence starting
** at index 0.
*/
int
subset_compare (char *string_to_compare, char *template_string)
{
int match;
if (template_string != (char *) NULL && string_to_compare != (char *) NULL
&& strlen (string_to_compare) <= strlen (template_string))
match =
(strncmp
(template_string, string_to_compare, strlen (string_to_compare)) == 0);
else
match = 0;
return match;
}
static void
pagination_on_command (char *arg, int from_tty)
{
pagination_enabled = 1;
}
static void
pagination_off_command (char *arg, int from_tty)
{
pagination_enabled = 0;
}
static void
show_debug_timestamp (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
fprintf_filtered (file, _("Timestamping debugging messages is %s.\n"),
value);
}
void
initialize_utils (void)
{
add_setshow_uinteger_cmd ("width", class_support, &chars_per_line, _("\
Set number of characters gdb thinks are in a line."), _("\
Show number of characters gdb thinks are in a line."), NULL,
set_width_command,
show_chars_per_line,
&setlist, &showlist);
add_setshow_uinteger_cmd ("height", class_support, &lines_per_page, _("\
Set number of lines gdb thinks are in a page."), _("\
Show number of lines gdb thinks are in a page."), NULL,
set_height_command,
show_lines_per_page,
&setlist, &showlist);
init_page_info ();
add_setshow_boolean_cmd ("pagination", class_support,
&pagination_enabled, _("\
Set state of pagination."), _("\
Show state of pagination."), NULL,
NULL,
show_pagination_enabled,
&setlist, &showlist);
if (xdb_commands)
{
add_com ("am", class_support, pagination_on_command,
_("Enable pagination"));
add_com ("sm", class_support, pagination_off_command,
_("Disable pagination"));
}
add_setshow_boolean_cmd ("sevenbit-strings", class_support,
&sevenbit_strings, _("\
Set printing of 8-bit characters in strings as \\nnn."), _("\
Show printing of 8-bit characters in strings as \\nnn."), NULL,
NULL,
show_sevenbit_strings,
&setprintlist, &showprintlist);
add_setshow_boolean_cmd ("timestamp", class_maintenance,
&debug_timestamp, _("\
Set timestamping of debugging messages."), _("\
Show timestamping of debugging messages."), _("\
When set, debugging messages will be marked with seconds and microseconds."),
NULL,
show_debug_timestamp,
&setdebuglist, &showdebuglist);
}
/* Machine specific function to handle SIGWINCH signal. */
#ifdef SIGWINCH_HANDLER_BODY
SIGWINCH_HANDLER_BODY
#endif
/* Print routines to handle variable size regs, etc. */
/* Temporary storage using circular buffer. */
#define NUMCELLS 16
#define CELLSIZE 50
static char *
get_cell (void)
{
static char buf[NUMCELLS][CELLSIZE];
static int cell = 0;
if (++cell >= NUMCELLS)
cell = 0;
return buf[cell];
}
const char *
paddress (struct gdbarch *gdbarch, CORE_ADDR addr)
{
/* Truncate address to the size of a target address, avoiding shifts
larger or equal than the width of a CORE_ADDR. The local
variable ADDR_BIT stops the compiler reporting a shift overflow
when it won't occur. */
/* NOTE: This assumes that the significant address information is
kept in the least significant bits of ADDR - the upper bits were
either zero or sign extended. Should gdbarch_address_to_pointer or
some ADDRESS_TO_PRINTABLE() be used to do the conversion? */
int addr_bit = gdbarch_addr_bit (gdbarch);
if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
addr &= ((CORE_ADDR) 1 << addr_bit) - 1;
return hex_string (addr);
}
/* This function is described in "defs.h". */
const char *
print_core_address (struct gdbarch *gdbarch, CORE_ADDR address)
{
int addr_bit = gdbarch_addr_bit (gdbarch);
if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
address &= ((CORE_ADDR) 1 << addr_bit) - 1;
/* FIXME: cagney/2002-05-03: Need local_address_string() function
that returns the language localized string formatted to a width
based on gdbarch_addr_bit. */
if (addr_bit <= 32)
return hex_string_custom (address, 8);
else
return hex_string_custom (address, 16);
}
/* Callback hash_f for htab_create_alloc or htab_create_alloc_ex. */
hashval_t
core_addr_hash (const void *ap)
{
const CORE_ADDR *addrp = ap;
return *addrp;
}
/* Callback eq_f for htab_create_alloc or htab_create_alloc_ex. */
int
core_addr_eq (const void *ap, const void *bp)
{
const CORE_ADDR *addr_ap = ap;
const CORE_ADDR *addr_bp = bp;
return *addr_ap == *addr_bp;
}
static char *
decimal2str (char *sign, ULONGEST addr, int width)
{
/* Steal code from valprint.c:print_decimal(). Should this worry
about the real size of addr as the above does? */
unsigned long temp[3];
char *str = get_cell ();
int i = 0;
do
{
temp[i] = addr % (1000 * 1000 * 1000);
addr /= (1000 * 1000 * 1000);
i++;
width -= 9;
}
while (addr != 0 && i < (sizeof (temp) / sizeof (temp[0])));
width += 9;
if (width < 0)
width = 0;
switch (i)
{
case 1:
xsnprintf (str, CELLSIZE, "%s%0*lu", sign, width, temp[0]);
break;
case 2:
xsnprintf (str, CELLSIZE, "%s%0*lu%09lu", sign, width,
temp[1], temp[0]);
break;
case 3:
xsnprintf (str, CELLSIZE, "%s%0*lu%09lu%09lu", sign, width,
temp[2], temp[1], temp[0]);
break;
default:
internal_error (__FILE__, __LINE__,
_("failed internal consistency check"));
}
return str;
}
static char *
octal2str (ULONGEST addr, int width)
{
unsigned long temp[3];
char *str = get_cell ();
int i = 0;
do
{
temp[i] = addr % (0100000 * 0100000);
addr /= (0100000 * 0100000);
i++;
width -= 10;
}
while (addr != 0 && i < (sizeof (temp) / sizeof (temp[0])));
width += 10;
if (width < 0)
width = 0;
switch (i)
{
case 1:
if (temp[0] == 0)
xsnprintf (str, CELLSIZE, "%*o", width, 0);
else
xsnprintf (str, CELLSIZE, "0%0*lo", width, temp[0]);
break;
case 2:
xsnprintf (str, CELLSIZE, "0%0*lo%010lo", width, temp[1], temp[0]);
break;
case 3:
xsnprintf (str, CELLSIZE, "0%0*lo%010lo%010lo", width,
temp[2], temp[1], temp[0]);
break;
default:
internal_error (__FILE__, __LINE__,
_("failed internal consistency check"));
}
return str;
}
char *
pulongest (ULONGEST u)
{
return decimal2str ("", u, 0);
}
char *
plongest (LONGEST l)
{
if (l < 0)
return decimal2str ("-", -l, 0);
else
return decimal2str ("", l, 0);
}
/* Eliminate warning from compiler on 32-bit systems. */
static int thirty_two = 32;
char *
phex (ULONGEST l, int sizeof_l)
{
char *str;
switch (sizeof_l)
{
case 8:
str = get_cell ();
xsnprintf (str, CELLSIZE, "%08lx%08lx",
(unsigned long) (l >> thirty_two),
(unsigned long) (l & 0xffffffff));
break;
case 4:
str = get_cell ();
xsnprintf (str, CELLSIZE, "%08lx", (unsigned long) l);
break;
case 2:
str = get_cell ();
xsnprintf (str, CELLSIZE, "%04x", (unsigned short) (l & 0xffff));
break;
default:
str = phex (l, sizeof (l));
break;
}
return str;
}
char *
phex_nz (ULONGEST l, int sizeof_l)
{
char *str;
switch (sizeof_l)
{
case 8:
{
unsigned long high = (unsigned long) (l >> thirty_two);
str = get_cell ();
if (high == 0)
xsnprintf (str, CELLSIZE, "%lx",
(unsigned long) (l & 0xffffffff));
else
xsnprintf (str, CELLSIZE, "%lx%08lx", high,
(unsigned long) (l & 0xffffffff));
break;
}
case 4:
str = get_cell ();
xsnprintf (str, CELLSIZE, "%lx", (unsigned long) l);
break;
case 2:
str = get_cell ();
xsnprintf (str, CELLSIZE, "%x", (unsigned short) (l & 0xffff));
break;
default:
str = phex_nz (l, sizeof (l));
break;
}
return str;
}
/* Converts a LONGEST to a C-format hexadecimal literal and stores it
in a static string. Returns a pointer to this string. */
char *
hex_string (LONGEST num)
{
char *result = get_cell ();
xsnprintf (result, CELLSIZE, "0x%s", phex_nz (num, sizeof (num)));
return result;
}
/* Converts a LONGEST number to a C-format hexadecimal literal and
stores it in a static string. Returns a pointer to this string
that is valid until the next call. The number is padded on the
left with 0s to at least WIDTH characters. */
char *
hex_string_custom (LONGEST num, int width)
{
char *result = get_cell ();
char *result_end = result + CELLSIZE - 1;
const char *hex = phex_nz (num, sizeof (num));
int hex_len = strlen (hex);
if (hex_len > width)
width = hex_len;
if (width + 2 >= CELLSIZE)
internal_error (__FILE__, __LINE__, _("\
hex_string_custom: insufficient space to store result"));
strcpy (result_end - width - 2, "0x");
memset (result_end - width, '0', width);
strcpy (result_end - hex_len, hex);
return result_end - width - 2;
}
/* Convert VAL to a numeral in the given radix. For
* radix 10, IS_SIGNED may be true, indicating a signed quantity;
* otherwise VAL is interpreted as unsigned. If WIDTH is supplied,
* it is the minimum width (0-padded if needed). USE_C_FORMAT means
* to use C format in all cases. If it is false, then 'x'
* and 'o' formats do not include a prefix (0x or leading 0). */
char *
int_string (LONGEST val, int radix, int is_signed, int width,
int use_c_format)
{
switch (radix)
{
case 16:
{
char *result;
if (width == 0)
result = hex_string (val);
else
result = hex_string_custom (val, width);
if (! use_c_format)
result += 2;
return result;
}
case 10:
{
if (is_signed && val < 0)
return decimal2str ("-", -val, width);
else
return decimal2str ("", val, width);
}
case 8:
{
char *result = octal2str (val, width);
if (use_c_format || val == 0)
return result;
else
return result + 1;
}
default:
internal_error (__FILE__, __LINE__,
_("failed internal consistency check"));
}
}
/* Convert a CORE_ADDR into a string. */
const char *
core_addr_to_string (const CORE_ADDR addr)
{
char *str = get_cell ();
strcpy (<