blob: 0a7c270b40db2646170a609b5189df4fee9fafaa [file] [log] [blame]
/* General utility routines for GDB, the GNU debugger.
Copyright (C) 1986-2021 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 <ctype.h>
#include "gdbsupport/gdb_wait.h"
#include "event-top.h"
#include "gdbthread.h"
#include "fnmatch.h"
#include "gdb_bfd.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
#include <signal.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 "gdb_curses.h"
#include "readline/readline.h"
#include <chrono>
#include "interps.h"
#include "gdb_regex.h"
#include "gdbsupport/job-control.h"
#include "gdbsupport/selftest.h"
#include "gdbsupport/gdb_optional.h"
#include "cp-support.h"
#include <algorithm>
#include "gdbsupport/pathstuff.h"
#include "cli/cli-style.h"
#include "gdbsupport/scope-exit.h"
#include "gdbarch.h"
#include "cli-out.h"
#include "gdbsupport/gdb-safe-ctype.h"
void (*deprecated_error_begin_hook) (void);
/* Prototypes for local functions */
static void vfprintf_maybe_filtered (struct ui_file *, const char *,
va_list, bool)
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);
/* Time spent in prompt_for_continue in the currently executing command
waiting for user to respond.
Initialized in make_command_stats_cleanup.
Modified in prompt_for_continue and defaulted_query.
Used in report_command_stats. */
static std::chrono::steady_clock::duration prompt_for_continue_wait_time;
/* A flag indicating whether to timestamp debugging messages. */
static bool debug_timestamp = false;
/* True means that strings with character values >0x7F should be printed
as octal escapes. False means just print the value (e.g. it's an
international character, and the terminal or window can cope.) */
bool sevenbit_strings = false;
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 warning messages, if any. */
const char *warning_pre_print = "\nwarning: ";
bool pagination_enabled = true;
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);
}
/* 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
{
gdb::optional<target_terminal::scoped_restore_terminal_state> term_state;
if (target_supports_terminal_ours ())
{
term_state.emplace ();
target_terminal::ours_for_output ();
}
if (filtered_printing_initialized ())
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");
}
}
/* 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_stream (const string_file &stream)
{
error (("%s"), stream.c_str ());
}
/* Emit a message and abort. */
static void ATTRIBUTE_NORETURN
abort_with_message (const char *msg)
{
if (current_ui == NULL)
fputs (msg, stderr);
else
fputs_unfiltered (msg, gdb_stderr);
abort (); /* ARI: abort */
}
/* Dump core trying to increase the core soft limit to hard limit first. */
void
dump_core (void)
{
#ifdef HAVE_SETRLIMIT
struct rlimit rlim = { (rlim_t) RLIM_INFINITY, (rlim_t) RLIM_INFINITY };
setrlimit (RLIMIT_CORE, &rlim);
#endif /* HAVE_SETRLIMIT */
/* Ensure that the SIGABRT we're about to raise will immediately cause
GDB to exit and dump core, we don't want to trigger GDB's printing of
a backtrace to the console here. */
signal (SIGABRT, SIG_DFL);
abort (); /* ARI: abort */
}
/* Check whether GDB will be able to dump core using the dump_core
function. Returns zero if GDB cannot or should not dump core.
If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
int
can_dump_core (enum resource_limit_kind limit_kind)
{
#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;
switch (limit_kind)
{
case LIMIT_CUR:
if (rlim.rlim_cur == 0)
return 0;
/* Fall through. */
case LIMIT_MAX:
if (rlim.rlim_max == 0)
return 0;
}
#endif /* HAVE_GETRLIMIT */
return 1;
}
/* Print a warning that we cannot dump core. */
void
warn_cant_dump_core (const char *reason)
{
fprintf_unfiltered (gdb_stderr,
_("%s\nUnable to dump core, use `ulimit -c"
" unlimited' before executing GDB next time.\n"),
reason);
}
/* Check whether GDB will be able to dump core using the dump_core
function, and print a warning if we cannot. */
static int
can_dump_core_warn (enum resource_limit_kind limit_kind,
const char *reason)
{
int core_dump_allowed = can_dump_core (limit_kind);
if (!core_dump_allowed)
warn_cant_dump_core (reason);
return core_dump_allowed;
}
/* 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
};
/* Data structure used to control how the internal_vproblem function
should behave. An instance of this structure is created for each
problem type that GDB supports. */
struct internal_problem
{
/* The name of this problem type. This must not contain white space as
this string is used to build command names. */
const char *name;
/* When this is true then a user command is created (based on NAME) that
allows the SHOULD_QUIT field to be modified, otherwise, SHOULD_QUIT
can't be changed from its default value by the user. */
bool user_settable_should_quit;
/* Reference a value from internal_problem_modes to indicate if GDB
should quit when it hits a problem of this type. */
const char *should_quit;
/* Like USER_SETTABLE_SHOULD_QUIT but for SHOULD_DUMP_CORE. */
bool user_settable_should_dump_core;
/* Like SHOULD_QUIT, but whether GDB should dump core. */
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;
std::string reason;
/* Don't allow infinite error/warning recursion. */
{
static const char msg[] = "Recursive internal problem.\n";
switch (dejavu)
{
case 0:
dejavu = 1;
break;
case 1:
dejavu = 2;
abort_with_message (msg);
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 (); /* ARI: abort */
exit (1);
}
}
/* 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. */
{
std::string msg = string_vprintf (fmt, ap);
reason = string_printf ("%s:%d: %s: %s\n"
"A problem internal to GDB has been detected,\n"
"further debugging may prove unreliable.",
file, line, problem->name, msg.c_str ());
}
/* Fall back to abort_with_message if gdb_stderr is not set up. */
if (current_ui == NULL)
{
fputs (reason.c_str (), stderr);
abort_with_message ("\n");
}
/* Try to get the message out and at the start of a new line. */
gdb::optional<target_terminal::scoped_restore_terminal_state> term_state;
if (target_supports_terminal_ours ())
{
term_state.emplace ();
target_terminal::ours_for_output ();
}
if (filtered_printing_initialized ())
begin_line ();
/* Emit the message unless query will emit it below. */
if (problem->should_quit != internal_problem_ask
|| !confirm
|| !filtered_printing_initialized ())
fprintf_unfiltered (gdb_stderr, "%s\n", reason.c_str ());
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 || !filtered_printing_initialized ())
quit_p = 1;
else
quit_p = query (_("%s\nQuit this debugging session? "),
reason.c_str ());
}
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"));
fputs_unfiltered (_("\nThis is a bug, please report it."), gdb_stderr);
if (REPORT_BUGS_TO[0])
fprintf_unfiltered (gdb_stderr, _(" For instructions, see:\n%s."),
REPORT_BUGS_TO);
fputs_unfiltered ("\n\n", gdb_stderr);
if (problem->should_dump_core == internal_problem_ask)
{
if (!can_dump_core_warn (LIMIT_MAX, reason.c_str ()))
dump_core_p = 0;
else if (!filtered_printing_initialized ())
dump_core_p = 1;
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.c_str ());
}
}
else if (problem->should_dump_core == internal_problem_yes)
dump_core_p = can_dump_core_warn (LIMIT_MAX, reason.c_str ());
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", true, internal_problem_ask, true, 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);
throw_quit (_("Command aborted."));
}
static struct internal_problem internal_warning_problem = {
"internal-warning", true, internal_problem_ask, true, 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);
}
static struct internal_problem demangler_warning_problem = {
"demangler-warning", true, internal_problem_ask, false, internal_problem_no,
};
void
demangler_vwarning (const char *file, int line, const char *fmt, va_list ap)
{
internal_vproblem (&demangler_warning_problem, file, line, fmt, ap);
}
void
demangler_warning (const char *file, int line, const char *string, ...)
{
va_list ap;
va_start (ap, string);
demangler_vwarning (file, line, string, ap);
va_end (ap);
}
/* 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;
set_cmd_list = XNEW (struct cmd_list_element *);
show_cmd_list = XNEW (struct cmd_list_element *);
*set_cmd_list = NULL;
*show_cmd_list = NULL;
/* The add_basic_prefix_cmd and add_show_prefix_cmd functions take
ownership of the string passed in, which is why we don't need to free
set_doc and show_doc in this function. */
const char *set_doc
= xstrprintf (_("Configure what GDB does when %s is detected."),
problem->name);
const char *show_doc
= xstrprintf (_("Show what GDB does when %s is detected."),
problem->name);
add_basic_prefix_cmd (problem->name, class_maintenance, set_doc,
set_cmd_list,
0/*allow-unknown*/, &maintenance_set_cmdlist);
add_show_prefix_cmd (problem->name, class_maintenance, show_doc,
show_cmd_list,
0/*allow-unknown*/, &maintenance_show_cmdlist);
if (problem->user_settable_should_quit)
{
std::string set_quit_doc
= string_printf (_("Set whether GDB should quit when an %s is "
"detected."), problem->name);
std::string show_quit_doc
= string_printf (_("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_quit_doc.c_str (),
show_quit_doc.c_str (),
NULL, /* help_doc */
NULL, /* setfunc */
NULL, /* showfunc */
set_cmd_list,
show_cmd_list);
}
if (problem->user_settable_should_dump_core)
{
std::string set_core_doc
= string_printf (_("Set whether GDB should create a core file of "
"GDB when %s is detected."), problem->name);
std::string show_core_doc
= string_printf (_("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_core_doc.c_str (),
show_core_doc.c_str (),
NULL, /* help_doc */
NULL, /* setfunc */
NULL, /* showfunc */
set_cmd_list,
show_cmd_list);
}
}
/* Return a newly allocated string, containing the PREFIX followed
by the system error message for errno (separated by a colon). */
static std::string
perror_string (const char *prefix)
{
const char *err = safe_strerror (errno);
return std::string (prefix) + ": " + err;
}
/* Print the system error message for errno, and also mention STRING
as the file name for which the error was encountered. Use ERRCODE
for the thrown exception. Then return to command level. */
void
throw_perror_with_name (enum errors errcode, const char *string)
{
std::string combined = perror_string (string);
/* 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;
throw_error (errcode, _("%s."), combined.c_str ());
}
/* See throw_perror_with_name, ERRCODE defaults here to GENERIC_ERROR. */
void
perror_with_name (const char *string)
{
throw_perror_with_name (GENERIC_ERROR, string);
}
/* Same as perror_with_name except that it prints a warning instead
of throwing an error. */
void
perror_warning_with_name (const char *string)
{
std::string combined = perror_string (string);
warning (_("%s"), combined.c_str ());
}
/* 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)
{
const char *err = safe_strerror (errcode);
/* We want anything which was printed on stdout to come out first, before
this message. */
gdb_flush (gdb_stdout);
fprintf_unfiltered (gdb_stderr, "%s: %s.\n", string, err);
}
/* Control C eventually causes this to be called, at a convenient time. */
void
quit (void)
{
if (sync_quit_force_run)
{
sync_quit_force_run = 0;
quit_force (NULL, 0);
}
#ifdef __MSDOS__
/* No steenking SIGINT will ever be coming our way when the
program is resumed. Don't lie. */
throw_quit ("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. */
|| !target_supports_terminal_ours ())
throw_quit ("Quit");
else
throw_quit ("Quit (expect signal SIGINT when the program is resumed)");
#endif
}
/* See defs.h. */
void
maybe_quit (void)
{
if (sync_quit_force_run)
quit ();
quit_handler ();
}
/* 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."));
}
}
/* See common/errors.h. */
void
flush_streams ()
{
gdb_stdout->flush ();
gdb_stderr->flush ();
}
/* 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;
}
/* See utils.h. */
ULONGEST
uinteger_pow (ULONGEST v1, LONGEST v2)
{
if (v2 < 0)
{
if (v1 == 0)
error (_("Attempt to raise 0 to negative power."));
else
return 0;
}
else
{
/* The Russian Peasant's Algorithm. */
ULONGEST v;
v = 1;
for (;;)
{
if (v2 & 1L)
v *= v1;
v2 >>= 1;
if (v2 == 0)
return v;
v1 *= v1;
}
}
}
void
print_spaces (int n, struct ui_file *file)
{
fputs_unfiltered (n_spaces (n), file);
}
/* Print a host address. */
void
gdb_print_host_address_1 (const void *addr, struct ui_file *stream)
{
fprintf_filtered (stream, "%s", host_address_to_string (addr));
}
/* An RAII class that sets up to handle input and then tears down
during destruction. */
class scoped_input_handler
{
public:
scoped_input_handler ()
: m_quit_handler (&quit_handler, default_quit_handler),
m_ui (NULL)
{
target_terminal::ours ();
ui_register_input_event_handler (current_ui);
if (current_ui->prompt_state == PROMPT_BLOCKED)
m_ui = current_ui;
}
~scoped_input_handler ()
{
if (m_ui != NULL)
ui_unregister_input_event_handler (m_ui);
}
DISABLE_COPY_AND_ASSIGN (scoped_input_handler);
private:
/* Save and restore the terminal state. */
target_terminal::scoped_restore_terminal_state m_term_state;
/* Save and restore the quit handler. */
scoped_restore_tmpl<quit_handler_ftype *> m_quit_handler;
/* The saved UI, if non-NULL. */
struct ui *m_ui;
};
/* 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 retval;
int def_value;
char def_answer, not_def_answer;
const char *y_string, *n_string;
/* 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 (current_ui->instream != current_ui->stdin_stream
|| !input_interactive_p (current_ui)
/* Restrict queries to the main UI. */
|| current_ui != main_ui)
{
target_terminal::scoped_restore_terminal_state term_state;
target_terminal::ours_for_output ();
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);
return def_value;
}
if (deprecated_query_hook)
{
target_terminal::scoped_restore_terminal_state term_state;
return deprecated_query_hook (ctlstr, args);
}
/* Format the question outside of the loop, to avoid reusing args. */
std::string question = string_vprintf (ctlstr, args);
std::string prompt
= string_printf (_("%s%s(%s or %s) %s"),
annotation_level > 1 ? "\n\032\032pre-query\n" : "",
question.c_str (), y_string, n_string,
annotation_level > 1 ? "\n\032\032query\n" : "");
/* Used to add duration we waited for user to respond to
prompt_for_continue_wait_time. */
using namespace std::chrono;
steady_clock::time_point prompt_started = steady_clock::now ();
scoped_input_handler prepare_input;
while (1)
{
char *response, answer;
gdb_flush (gdb_stdout);
response = gdb_readline_wrapper (prompt.c_str ());
if (response == NULL) /* C-d */
{
printf_filtered ("EOF [assumed %c]\n", def_answer);
retval = def_value;
break;
}
answer = response[0];
xfree (response);
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 == '\0'))
{
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);
}
/* Add time spend in this routine to prompt_for_continue_wait_time. */
prompt_for_continue_wait_time += steady_clock::now () - prompt_started;
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)
{
char the_char = c;
int result = 0;
auto_obstack host_data;
convert_between_encodings (target_charset (gdbarch), host_charset (),
(gdb_byte *) &the_char, 1, 1,
&host_data, translit_none);
if (obstack_object_size (&host_data) == 1)
{
result = 1;
*target_c = *(char *) obstack_base (&host_data);
}
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, const 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 called for printing things which are independent of the language
of the program being debugged.
printchar will normally escape backslashes and instances of QUOTER. If
QUOTER is 0, printchar won't escape backslashes or any quoting character.
As a side effect, if you pass the backslash character as the QUOTER,
printchar will escape backslashes as usual, but not any other quoting
character. */
static void
printchar (int c, do_fputc_ftype do_fputc, 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 */
do_fputc ('\\', stream);
switch (c)
{
case '\n':
do_fputc ('n', stream);
break;
case '\b':
do_fputc ('b', stream);
break;
case '\t':
do_fputc ('t', stream);
break;
case '\f':
do_fputc ('f', stream);
break;
case '\r':
do_fputc ('r', stream);
break;
case '\033':
do_fputc ('e', stream);
break;
case '\007':
do_fputc ('a', stream);
break;
default:
{
do_fputc ('0' + ((c >> 6) & 0x7), stream);
do_fputc ('0' + ((c >> 3) & 0x7), stream);
do_fputc ('0' + ((c >> 0) & 0x7), stream);
break;
}
}
}
else
{
if (quoter != 0 && (c == '\\' || c == quoter))
do_fputc ('\\', stream);
do_fputc (c, stream);
}
}
/* 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++, fputc_filtered, stream, quoter);
}
void
fputstr_unfiltered (const char *str, int quoter, struct ui_file *stream)
{
while (*str)
printchar (*str++, fputc_unfiltered, stream, quoter);
}
void
fputstrn_filtered (const char *str, int n, int quoter,
struct ui_file *stream)
{
for (int i = 0; i < n; i++)
printchar (str[i], fputc_filtered, stream, quoter);
}
void
fputstrn_unfiltered (const char *str, int n, int quoter,
do_fputc_ftype do_fputc, struct ui_file *stream)
{
for (int i = 0; i < n; i++)
printchar (str[i], do_fputc, 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;
/* True if pagination is disabled for just one command. */
static bool pagination_disabled_for_command;
/* 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. */
static bool filter_initialized = false;
/* Contains characters which are waiting to be output (they have
already been counted in chars_printed). */
static std::string wrap_buffer;
/* String to indent by if the wrap occurs. Must not be NULL if wrap_column
is non-zero. */
static const char *wrap_indent;
/* Column number on the screen where wrap_buffer begins, or 0 if wrapping
is not in effect. */
static int wrap_column;
/* The style applied at the time that wrap_here was called. */
static ui_file_style wrap_style;
/* Initialize 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.
Only try to use tgetnum function if rl_get_screen_size
did not return a useful value. */
if (((rows <= 0) && (tgetnum ((char *) "li") < 0))
/* Also disable paging if inside Emacs. $EMACS was used
before Emacs v25.1, $INSIDE_EMACS is used since then. */
|| getenv ("EMACS") || getenv ("INSIDE_EMACS"))
{
/* The number of lines per page is not mentioned in the terminal
description or EMACS environment variable is set. This probably
means that paging is not useful, so disable paging. */
lines_per_page = UINT_MAX;
}
/* If the output is not a terminal, don't paginate it. */
if (!gdb_stdout->isatty ())
lines_per_page = UINT_MAX;
#endif
}
/* We handle SIGWINCH ourselves. */
rl_catch_sigwinch = 0;
set_screen_size ();
set_width ();
}
/* Return nonzero if filtered printing is initialized. */
int
filtered_printing_initialized (void)
{
return filter_initialized;
}
set_batch_flag_and_restore_page_info::set_batch_flag_and_restore_page_info ()
: m_save_lines_per_page (lines_per_page),
m_save_chars_per_line (chars_per_line),
m_save_batch_flag (batch_flag)
{
batch_flag = 1;
init_page_info ();
}
set_batch_flag_and_restore_page_info::~set_batch_flag_and_restore_page_info ()
{
batch_flag = m_save_batch_flag;
chars_per_line = m_save_chars_per_line;
lines_per_page = m_save_lines_per_page;
set_screen_size ();
set_width ();
}
/* 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 we get 0 or negative ROWS or COLS, treat as "infinite" size.
A negative number can be seen here with the "set width/height"
commands and either:
- the user specified "unlimited", which maps to UINT_MAX, or
- the user specified some number between INT_MAX and UINT_MAX.
Cap "infinity" to approximately sqrt(INT_MAX) so that we don't
overflow in rl_set_screen_size, which multiplies rows and columns
to compute the number of characters on the screen. */
const int sqrt_int_max = INT_MAX >> (sizeof (int) * 8 / 2);
if (rows <= 0 || rows > sqrt_int_max)
{
rows = sqrt_int_max;
lines_per_page = UINT_MAX;
}
if (cols <= 0 || cols > sqrt_int_max)
{
cols = sqrt_int_max;
chars_per_line = UINT_MAX;
}
/* Update Readline's idea of the terminal size. */
rl_set_screen_size (rows, cols);
}
/* Reinitialize WRAP_BUFFER. */
static void
set_width (void)
{
if (chars_per_line == 0)
init_page_info ();
wrap_buffer.clear ();
filter_initialized = true;
}
static void
set_width_command (const char *args, int from_tty, struct cmd_list_element *c)
{
set_screen_size ();
set_width ();
}
static void
set_height_command (const char *args, int from_tty, struct cmd_list_element *c)
{
set_screen_size ();
}
/* See utils.h. */
void
set_screen_width_and_height (int width, int height)
{
lines_per_page = height;
chars_per_line = width;
set_screen_size ();
set_width ();
}
/* The currently applied style. */
static ui_file_style applied_style;
/* Emit an ANSI style escape for STYLE. If STREAM is nullptr, emit to
the wrap buffer; otherwise emit to STREAM. */
static void
emit_style_escape (const ui_file_style &style,
struct ui_file *stream = nullptr)
{
if (applied_style != style)
{
applied_style = style;
if (stream == nullptr)
wrap_buffer.append (style.to_ansi ());
else
stream->puts (style.to_ansi ().c_str ());
}
}
/* Set the current output style. This will affect future uses of the
_filtered output functions. */
static void
set_output_style (struct ui_file *stream, const ui_file_style &style)
{
if (!stream->can_emit_style_escape ())
return;
/* Note that we may not pass STREAM here, when we want to emit to
the wrap buffer, not directly to STREAM. */
if (stream == gdb_stdout)
stream = nullptr;
emit_style_escape (style, stream);
}
/* See utils.h. */
void
reset_terminal_style (struct ui_file *stream)
{
if (stream->can_emit_style_escape ())
{
/* Force the setting, regardless of what we think the setting
might already be. */
applied_style = ui_file_style ();
wrap_buffer.append (applied_style.to_ansi ());
}
}
/* Wait, so the user can read what's on the screen. Prompt the user
to continue by pressing RETURN. 'q' is also provided because
telling users what to do in the prompt is more user-friendly than
expecting them to think of Ctrl-C/SIGINT. */
static void
prompt_for_continue (void)
{
char cont_prompt[120];
/* Used to add duration we waited for user to respond to
prompt_for_continue_wait_time. */
using namespace std::chrono;
steady_clock::time_point prompt_started = steady_clock::now ();
bool disable_pagination = pagination_disabled_for_command;
/* Clear the current styling. */
if (gdb_stdout->can_emit_style_escape ())
emit_style_escape (ui_file_style (), gdb_stdout);
if (annotation_level > 1)
printf_unfiltered (("\n\032\032pre-prompt-for-continue\n"));
strcpy (cont_prompt,
"--Type <RET> for more, q to quit, "
"c to continue without paging--");
if (annotation_level > 1)
strcat (cont_prompt, "\n\032\032prompt-for-continue\n");
/* We must do this *before* we call gdb_readline_wrapper, else it
will eventually call us -- thinking that we're trying to print
beyond the end of the screen. */
reinitialize_more_filter ();
scoped_input_handler prepare_input;
/* Call gdb_readline_wrapper, not readline, in order to keep an
event loop running. */
gdb::unique_xmalloc_ptr<char> ignore (gdb_readline_wrapper (cont_prompt));
/* Add time spend in this routine to prompt_for_continue_wait_time. */
prompt_for_continue_wait_time += steady_clock::now () - prompt_started;
if (annotation_level > 1)
printf_unfiltered (("\n\032\032post-prompt-for-continue\n"));
if (ignore != NULL)
{
char *p = ignore.get ();
while (*p == ' ' || *p == '\t')
++p;
if (p[0] == 'q')
/* Do not call quit here; there is no possibility of SIGINT. */
throw_quit ("Quit");
if (p[0] == 'c')
disable_pagination = true;
}
/* 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 ();
pagination_disabled_for_command = disable_pagination;
dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
}
/* Initialize timer to keep track of how long we waited for the user. */
void
reset_prompt_for_continue_wait_time (void)
{
using namespace std::chrono;
prompt_for_continue_wait_time = steady_clock::duration::zero ();
}
/* Fetch the cumulative time spent in prompt_for_continue. */
std::chrono::steady_clock::duration
get_prompt_for_continue_wait_time ()
{
return prompt_for_continue_wait_time;
}
/* Reinitialize filter; ie. tell it to reset to original values. */
void
reinitialize_more_filter (void)
{
lines_printed = 0;
chars_printed = 0;
pagination_disabled_for_command = false;
}
/* Flush the wrap buffer to STREAM, if necessary. */
static void
flush_wrap_buffer (struct ui_file *stream)
{
if (stream == gdb_stdout && !wrap_buffer.empty ())
{
stream->puts (wrap_buffer.c_str ());
wrap_buffer.clear ();
}
}
/* See utils.h. */
void
gdb_flush (struct ui_file *stream)
{
flush_wrap_buffer (stream);
stream->flush ();
}
/* See utils.h. */
int
get_chars_per_line ()
{
return chars_per_line;
}
/* 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 (const char *indent)
{
/* This should have been allocated, but be paranoid anyway. */
gdb_assert (filter_initialized);
flush_wrap_buffer (gdb_stdout);
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;
wrap_style = applied_style;
}
}
/* 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 = (char *) 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
|| pagination_disabled_for_command
|| batch_flag
|| (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX)
|| top_level_interpreter () == NULL
|| top_level_interpreter ()->interp_ui_out ()->is_mi_like_p ())
{
flush_wrap_buffer (stream);
stream->puts (linebuffer);
return;
}
auto buffer_clearer
= make_scope_exit ([&] ()
{
wrap_buffer.clear ();
wrap_column = 0;
wrap_indent = "";
});
/* 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. Note that PAGINATION_DISABLED_FOR_COMMAND
might be set during this loop, so we must continue to check
it here. */
if (filter && (lines_printed >= lines_per_page - 1)
&& !pagination_disabled_for_command)
prompt_for_continue ();
while (*lineptr && *lineptr != '\n')
{
int skip_bytes;
/* Print a single line. */
if (*lineptr == '\t')
{
wrap_buffer.push_back ('\t');
/* 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 (*lineptr == '\033'
&& skip_ansi_escape (lineptr, &skip_bytes))
{
wrap_buffer.append (lineptr, skip_bytes);
/* Note that we don't consider this a character, so we
don't increment chars_printed here. */
lineptr += skip_bytes;
}
else if (*lineptr == '\r')
{
wrap_buffer.push_back (*lineptr);
chars_printed = 0;
lineptr++;
}
else
{
wrap_buffer.push_back (*lineptr);
chars_printed++;
lineptr++;
}
if (chars_printed >= chars_per_line)
{
unsigned int save_chars = chars_printed;
/* If we change the style, below, we'll want to reset it
before continuing to print. If there is no wrap
column, then we'll only reset the style if the pager
prompt is given; and to avoid emitting style
sequences in the middle of a run of text, we track
this as well. */
ui_file_style save_style = applied_style;
bool did_paginate = false;
chars_printed = 0;
lines_printed++;
if (wrap_column)
{
/* We are about to insert a newline at an historic
location in the WRAP_BUFFER. Before we do we want to
restore the default style. To know if we actually
need to insert an escape sequence we must restore the
current applied style to how it was at the WRAP_COLUMN
location. */
applied_style = wrap_style;
if (stream->can_emit_style_escape ())
emit_style_escape (ui_file_style (), stream);
/* 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. */
/* XXX: The ideal thing would be to call
'stream->putc' here, but we can't because it
currently calls 'fputc_unfiltered', which ends up
calling us, which generates an infinite
recursion. */
stream->puts ("\n");
}
else
flush_wrap_buffer (stream);
/* Possible new page. Note that
PAGINATION_DISABLED_FOR_COMMAND might be set during
this loop, so we must continue to check it here. */
if (lines_printed >= lines_per_page - 1
&& !pagination_disabled_for_command)
{
prompt_for_continue ();
did_paginate = true;
}
/* Now output indentation and wrapped string. */
if (wrap_column)
{
stream->puts (wrap_indent);
/* Having finished inserting the wrapping we should
restore the style as it was at the WRAP_COLUMN. */
if (stream->can_emit_style_escape ())
emit_style_escape (wrap_style, stream);
/* The WRAP_BUFFER will still contain content, and that
content might set some alternative style. Restore
APPLIED_STYLE as it was before we started wrapping,
this reflects the current style for the last character
in WRAP_BUFFER. */
applied_style = save_style;
/* 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_column = 0; /* And disable fancy wrap */
}
else if (did_paginate && stream->can_emit_style_escape ())
emit_style_escape (save_style, stream);
}
}
if (*lineptr == '\n')
{
chars_printed = 0;
wrap_here ((char *) 0); /* Spit out chars, cancel
further wraps. */
lines_printed++;
/* XXX: The ideal thing would be to call
'stream->putc' here, but we can't because it
currently calls 'fputc_unfiltered', which ends up
calling us, which generates an infinite
recursion. */
stream->puts ("\n");
lineptr++;
}
}
buffer_clearer.release ();
}
void
fputs_filtered (const char *linebuffer, struct ui_file *stream)
{
fputs_maybe_filtered (linebuffer, stream, 1);
}
void
fputs_unfiltered (const char *linebuffer, struct ui_file *stream)
{
fputs_maybe_filtered (linebuffer, stream, 0);
}
/* See utils.h. */
void
fputs_styled (const char *linebuffer, const ui_file_style &style,
struct ui_file *stream)
{
set_output_style (stream, style);
fputs_maybe_filtered (linebuffer, stream, 1);
set_output_style (stream, ui_file_style ());
}
/* See utils.h. */
void
fputs_styled_unfiltered (const char *linebuffer, const ui_file_style &style,
struct ui_file *stream)
{
set_output_style (stream, style);
fputs_maybe_filtered (linebuffer, stream, 0);
set_output_style (stream, ui_file_style ());
}
/* See utils.h. */
void
fputs_highlighted (const char *str, const compiled_regex &highlight,
struct ui_file *stream)
{
regmatch_t pmatch;
while (*str && highlight.exec (str, 1, &pmatch, 0) == 0)
{
size_t n_highlight = pmatch.rm_eo - pmatch.rm_so;
/* Output the part before pmatch with current style. */
while (pmatch.rm_so > 0)
{
fputc_filtered (*str, stream);
pmatch.rm_so--;
str++;
}
/* Output pmatch with the highlight style. */
set_output_style (stream, highlight_style.style ());
while (n_highlight > 0)
{
fputc_filtered (*str, stream);
n_highlight--;
str++;
}
set_output_style (stream, ui_file_style ());
}
/* Output the trailing part of STR not matching HIGHLIGHT. */
if (*str)
fputs_filtered (str, stream);
}
int
putchar_unfiltered (int c)
{
return fputc_unfiltered (c, gdb_stdout);
}
/* 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[2];
buf[0] = c;
buf[1] = 0;
fputs_unfiltered (buf, stream);
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 const char *prev_prefix = "";
static const 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 (gdb_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 permission 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 this may throw a quit (since prompt_for_continue may
do so). */
static void
vfprintf_maybe_filtered (struct ui_file *stream, const char *format,
va_list args, bool filter)
{
ui_out_flags flags = disallow_ui_out_field;
if (!filter)
flags |= unfiltered_output;
cli_ui_out (stream, flags).vmessage (applied_style, format, args);
}
void
vfprintf_filtered (struct ui_file *stream, const char *format, va_list args)
{
vfprintf_maybe_filtered (stream, format, args, true);
}
void
vfprintf_unfiltered (struct ui_file *stream, const char *format, va_list args)
{
if (debug_timestamp && stream == gdb_stdlog)
{
static bool needs_timestamp = true;
/* Print timestamp if previous print ended with a \n. */
if (needs_timestamp)
{
using namespace std::chrono;
steady_clock::time_point now = steady_clock::now ();
seconds s = duration_cast<seconds> (now.time_since_epoch ());
microseconds us = duration_cast<microseconds> (now.time_since_epoch () - s);
std::string timestamp = string_printf ("%ld.%06ld ",
(long) s.count (),
(long) us.count ());
fputs_unfiltered (timestamp.c_str (), stream);
}
/* Print the message. */
string_file sfile;
cli_ui_out (&sfile, 0).vmessage (ui_file_style (), format, args);
std::string linebuffer = std::move (sfile.string ());
fputs_unfiltered (linebuffer.c_str (), stream);
size_t len = linebuffer.length ();
needs_timestamp = (len > 0 && linebuffer[len - 1] == '\n');
}
else
vfprintf_maybe_filtered (stream, format, args, false);
}
void
vprintf_filtered (const char *format, va_list args)
{
vfprintf_filtered (gdb_stdout, format, args);
}
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);
}
/* See utils.h. */
void
fprintf_styled (struct ui_file *stream, const ui_file_style &style,
const char *format, ...)
{
va_list args;
set_output_style (stream, style);
va_start (args, format);
vfprintf_filtered (stream, format, args);
va_end (args);
set_output_style (stream, ui_file_style ());
}
/* See utils.h. */
void
vfprintf_styled (struct ui_file *stream, const ui_file_style &style,
const char *format, va_list args)
{
set_output_style (stream, style);
vfprintf_filtered (stream, format, args);
set_output_style (stream, ui_file_style ());
}
/* See utils.h. */
void
vfprintf_styled_no_gdbfmt (struct ui_file *stream, const ui_file_style &style,
bool filter, const char *format, va_list args)
{
std::string str = string_vprintf (format, args);
if (!str.empty ())
{
set_output_style (stream, style);
fputs_maybe_filtered (str.c_str (), stream, filter);
set_output_style (stream, ui_file_style ());
}
}
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);
}
/* 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)
{
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);
}
}
}
}
/* True if CH is a character that can be part of a symbol name. I.e.,
either a number, a letter, or a '_'. */
static bool
valid_identifier_name_char (int ch)
{
return (ISALNUM (ch) || ch == '_');
}
/* Skip to end of token, or to END, whatever comes first. Input is
assumed to be a C++ operator name. */
static const char *
cp_skip_operator_token (const char *token, const char *end)
{
const char *p = token;
while (p != end && !ISSPACE (*p) && *p != '(')
{
if (valid_identifier_name_char (*p))
{
while (p != end && valid_identifier_name_char (*p))
p++;
return p;
}
else
{
/* Note, ordered such that among ops that share a prefix,
longer comes first. This is so that the loop below can
bail on first match. */
static const char *ops[] =
{
"[",
"]",
"~",
",",
"-=", "--", "->", "-",
"+=", "++", "+",
"*=", "*",
"/=", "/",
"%=", "%",
"|=", "||", "|",
"&=", "&&", "&",
"^=", "^",
"!=", "!",
"<<=", "<=", "<<", "<",
">>=", ">=", ">>", ">",
"==", "=",
};
for (const char *op : ops)
{
size_t oplen = strlen (op);
size_t lencmp = std::min<size_t> (oplen, end - p);
if (strncmp (p, op, lencmp) == 0)
return p + lencmp;
}
/* Some unidentified character. Return it. */
return p + 1;
}
}
return p;
}
/* Advance STRING1/STRING2 past whitespace. */
static void
skip_ws (const char *&string1, const char *&string2, const char *end_str2)
{
while (ISSPACE (*string1))
string1++;
while (string2 < end_str2 && ISSPACE (*string2))
string2++;
}
/* True if STRING points at the start of a C++ operator name. START
is the start of the string that STRING points to, hence when
reading backwards, we must not read any character before START. */
static bool
cp_is_operator (const char *string, const char *start)
{
return ((string == start
|| !valid_identifier_name_char (string[-1]))
&& strncmp (string, CP_OPERATOR_STR, CP_OPERATOR_LEN) == 0
&& !valid_identifier_name_char (string[CP_OPERATOR_LEN]));
}
/* If *NAME points at an ABI tag, skip it and return true. Otherwise
leave *NAME unmodified and return false. (see GCC's abi_tag
attribute), such names are demangled as e.g.,
"function[abi:cxx11]()". */
static bool
skip_abi_tag (const char **name)
{
const char *p = *name;
if (startswith (p, "[abi:"))
{
p += 5;
while (valid_identifier_name_char (*p))
p++;
if (*p == ']')
{
p++;
*name = p;
return true;
}
}
return false;
}
/* See utils.h. */
int
strncmp_iw_with_mode (const char *string1, const char *string2,
size_t string2_len, strncmp_iw_mode mode,
enum language language,
completion_match_for_lcd *match_for_lcd)
{
const char *string1_start = string1;
const char *end_str2 = string2 + string2_len;
bool skip_spaces = true;
bool have_colon_op = (language == language_cplus
|| language == language_rust
|| language == language_fortran);
while (1)
{
if (skip_spaces
|| ((ISSPACE (*string1) && !valid_identifier_name_char (*string2))
|| (ISSPACE (*string2) && !valid_identifier_name_char (*string1))))
{
skip_ws (string1, string2, end_str2);
skip_spaces = false;
}
/* Skip [abi:cxx11] tags in the symbol name if the lookup name
doesn't include them. E.g.:
string1: function[abi:cxx1](int)
string2: function
string1: function[abi:cxx1](int)
string2: function(int)
string1: Struct[abi:cxx1]::function()
string2: Struct::function()
string1: function(Struct[abi:cxx1], int)
string2: function(Struct, int)
*/
if (string2 == end_str2
|| (*string2 != '[' && !valid_identifier_name_char (*string2)))
{
const char *abi_start = string1;
/* There can be more than one tag. */
while (*string1 == '[' && skip_abi_tag (&string1))
;
if (match_for_lcd != NULL && abi_start != string1)
match_for_lcd->mark_ignored_range (abi_start, string1);
while (ISSPACE (*string1))
string1++;
}
if (*string1 == '\0' || string2 == end_str2)
break;
/* Handle the :: operator. */
if (have_colon_op && string1[0] == ':' && string1[1] == ':')
{
if (*string2 != ':')
return 1;
string1++;
string2++;
if (string2 == end_str2)
break;
if (*string2 != ':')
return 1;
string1++;
string2++;
while (ISSPACE (*string1))
string1++;
while (string2 < end_str2 && ISSPACE (*string2))
string2++;
continue;
}
/* Handle C++ user-defined operators. */
else if (language == language_cplus
&& *string1 == 'o')
{
if (cp_is_operator (string1, string1_start))
{
/* An operator name in STRING1. Check STRING2. */
size_t cmplen
= std::min<size_t> (CP_OPERATOR_LEN, end_str2 - string2);
if (strncmp (string1, string2, cmplen) != 0)
return 1;
string1 += cmplen;
string2 += cmplen;
if (string2 != end_str2)
{
/* Check for "operatorX" in STRING2. */
if (valid_identifier_name_char (*string2))
return 1;
skip_ws (string1, string2, end_str2);
}
/* Handle operator(). */
if (*string1 == '(')
{
if (string2 == end_str2)
{
if (mode == strncmp_iw_mode::NORMAL)
return 0;
else
{
/* Don't break for the regular return at the
bottom, because "operator" should not
match "operator()", since this open
parentheses is not the parameter list
start. */
return *string1 != '\0';
}
}
if (*string1 != *string2)
return 1;
string1++;
string2++;
}
while (1)
{
skip_ws (string1, string2, end_str2);
/* Skip to end of token, or to END, whatever comes
first. */
const char *end_str1 = string1 + strlen (string1);
const char *p1 = cp_skip_operator_token (string1, end_str1);
const char *p2 = cp_skip_operator_token (string2, end_str2);
cmplen = std::min (p1 - string1, p2 - string2);
if (p2 == end_str2)
{
if (strncmp (string1, string2, cmplen) != 0)
return 1;
}
else
{
if (p1 - string1 != p2 - string2)
return 1;
if (strncmp (string1, string2, cmplen) != 0)
return 1;
}
string1 += cmplen;
string2 += cmplen;
if (*string1 == '\0' || string2 == end_str2)
break;
if (*string1 == '(' || *string2 == '(')
break;
}
continue;
}
}
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 we see any non-whitespace, non-identifier-name character
(any of "()<>*&" etc.), then skip spaces the next time
around. */
if (!ISSPACE (*string1) && !valid_identifier_name_char (*string1))
skip_spaces = true;
string1++;
string2++;
}
if (string2 == end_str2)
{
if (mode == strncmp_iw_mode::NORMAL)
{
/* Strip abi tag markers from the matched symbol name.
Usually the ABI marker will be found on function name
(automatically added because the function returns an
object marked with an ABI tag). However, it's also
possible to see a marker in one of the function
parameters, for example.
string2 (lookup name):
func
symbol name:
function(some_struct[abi:cxx11], int)
and for completion LCD computation we want to say that
the match was for:
function(some_struct, int)
*/
if (match_for_lcd != NULL)
{
while ((string1 = strstr (string1, "[abi:")) != NULL)
{
const char *abi_start = string1;
/* There can be more than one tag. */
while (skip_abi_tag (&string1) && *string1 == '[')
;
if (abi_start != string1)
match_for_lcd->mark_ignored_range (abi_start, string1);
}
}
return 0;
}
else
return (*string1 != '\0' && *string1 != '(');
}
else
return 1;
}
/* See utils.h. */
int
strncmp_iw (const char *string1, const char *string2, size_t string2_len)
{
return strncmp_iw_with_mode (string1, string2, string2_len,
strncmp_iw_mode::NORMAL, language_minimal);
}
/* See utils.h. */
int
strcmp_iw (const char *string1, const char *string2)
{
return strncmp_iw_with_mode (string1, string2, strlen (string2),
strncmp_iw_mode::MATCH_PARAMS, language_minimal);
}
/* 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;
}
}
/* See utils.h. */
bool
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 (const char *string_to_compare, const char *template_string)
{
int match;
if (template_string != NULL && string_to_compare != NULL
&& strlen (string_to_compare) <= strlen (template_string))
match =
(startswith (template_string, string_to_compare));
else
match = 0;
return match;
}
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);
}
/* See utils.h. */
CORE_ADDR
address_significant (gdbarch *gdbarch, CORE_ADDR addr)
{
/* Clear insignificant bits of a target address and sign extend resulting
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. Skip updating of target address if current target
has not set gdbarch significant_addr_bit. */
int addr_bit = gdbarch_significant_addr_bit (gdbarch);
if (addr_bit && (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)))
{
CORE_ADDR sign = (CORE_ADDR) 1 << (addr_bit - 1);
addr &= ((CORE_ADDR) 1 << addr_bit) - 1;
addr = (addr ^ sign) - sign;
}
return addr;
}
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 = (const CORE_ADDR *) 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 = (const CORE_ADDR *) ap;
const CORE_ADDR *addr_bp = (const CORE_ADDR *) bp;
return *addr_ap == *addr_bp;
}
/* Convert a string back into a CORE_ADDR. */
CORE_ADDR
string_to_core_addr (const char *my_string)
{
CORE_ADDR addr = 0;
if (my_string[0] == '0' && TOLOWER (my_string[1]) == 'x')
{
/* Assume that it is in hex. */
int i;
for (i = 2; my_string[i] != '\0'; i++)
{
if (ISDIGIT (my_string[i]))
addr = (my_string[i] - '0') + (addr * 16);
else if (ISXDIGIT (my_string[i]))
addr = (TOLOWER (my_string[i]) - 'a' + 0xa) + (addr * 16);
else
error (_("invalid hex \"%s\""), my_string);
}
}
else
{
/* Assume that it is in decimal. */
int i;
for (i = 0; my_string[i] != '\0'; i++)
{
if (ISDIGIT (my_string[i]))
addr = (my_string[i] - '0') + (addr * 10);
else
error (_("invalid decimal \"%s\""), my_string);
}
}
return addr;
}
#if GDB_SELF_TEST
static void
gdb_realpath_check_trailer (const char *input, const char *trailer)
{
gdb::unique_xmalloc_ptr<char> result = gdb_realpath (input);
size_t len = strlen (result.get ());
size_t trail_len = strlen (trailer);
SELF_CHECK (len >= trail_len
&& strcmp (result.get () + len - trail_len, trailer) == 0);
}
static void
gdb_realpath_tests ()
{
/* A file which contains a directory prefix. */
gdb_realpath_check_trailer ("./xfullpath.exp", "/xfullpath.exp");
/* A file which contains a directory prefix. */
gdb_realpath_check_trailer ("../../defs.h", "/defs.h");
/* A one-character filename. */
gdb_realpath_check_trailer ("./a", "/a");
/* A file in the root directory. */
gdb_realpath_check_trailer ("/root_file_which_should_exist",
"/root_file_which_should_exist");
/* A file which does not have a directory prefix. */
gdb_realpath_check_trailer ("xfullpath.exp", "xfullpath.exp");
/* A one-char filename without any directory prefix. */
gdb_realpath_check_trailer ("a", "a");
/* An empty filename. */
gdb_realpath_check_trailer ("", "");
}
/* Test the gdb_argv::as_array_view method. */
static void
gdb_argv_as_array_view_test ()
{
{
gdb_argv argv;
gdb::array_view<char *> view = argv.as_array_view ();
SELF_CHECK (view.data () == nullptr);
SELF_CHECK (view.size () == 0);
}