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binutils-gdb/gdb/mi/mi-cmd-break.c

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/* MI Command Set - breakpoint and watchpoint commands.
Copyright (C) 2000-2016 Free Software Foundation, Inc.
Contributed by Cygnus Solutions (a Red Hat company).
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 "arch-utils.h"
#include "mi-cmds.h"
#include "ui-out.h"
#include "mi-out.h"
#include "breakpoint.h"
#include "mi-getopt.h"
#include "gdb.h"
#include "observer.h"
#include "mi-main.h"
#include "mi-cmd-break.h"
#include "language.h"
#include "location.h"
#include "linespec.h"
#include "gdb_obstack.h"
#include <ctype.h>
enum
{
FROM_TTY = 0
};
/* True if MI breakpoint observers have been registered. */
static int mi_breakpoint_observers_installed;
/* Control whether breakpoint_notify may act. */
static int mi_can_breakpoint_notify;
/* Output a single breakpoint, when allowed. */
static void
breakpoint_notify (struct breakpoint *b)
{
if (mi_can_breakpoint_notify)
gdb_breakpoint_query (current_uiout, b->number, NULL);
}
enum bp_type
{
REG_BP,
HW_BP,
REGEXP_BP
};
/* Arrange for all new breakpoints and catchpoints to be reported to
CURRENT_UIOUT until the cleanup returned by this function is run.
Note that MI output will be probably invalid if more than one
breakpoint is created inside one MI command. */
struct cleanup *
setup_breakpoint_reporting (void)
{
struct cleanup *rev_flag;
if (! mi_breakpoint_observers_installed)
{
observer_attach_breakpoint_created (breakpoint_notify);
mi_breakpoint_observers_installed = 1;
}
rev_flag = make_cleanup_restore_integer (&mi_can_breakpoint_notify);
mi_can_breakpoint_notify = 1;
return rev_flag;
}
/* Convert arguments in ARGV to the string in "format",argv,argv...
and return it. */
static char *
mi_argv_to_format (char **argv, int argc)
{
int i;
struct obstack obstack;
char *ret;
obstack_init (&obstack);
/* Convert ARGV[OIND + 1] to format string and save to FORMAT. */
obstack_1grow (&obstack, '\"');
for (i = 0; i < strlen (argv[0]); i++)
{
switch (argv[0][i])
{
case '\\':
obstack_grow (&obstack, "\\\\", 2);
break;
case '\a':
obstack_grow (&obstack, "\\a", 2);
break;
case '\b':
obstack_grow (&obstack, "\\b", 2);
break;
case '\f':
obstack_grow (&obstack, "\\f", 2);
break;
case '\n':
obstack_grow (&obstack, "\\n", 2);
break;
case '\r':
obstack_grow (&obstack, "\\r", 2);
break;
case '\t':
obstack_grow (&obstack, "\\t", 2);
break;
case '\v':
obstack_grow (&obstack, "\\v", 2);
break;
case '"':
obstack_grow (&obstack, "\\\"", 2);
break;
default:
if (isprint (argv[0][i]))
obstack_grow (&obstack, argv[0] + i, 1);
else
{
char tmp[5];
xsnprintf (tmp, sizeof (tmp), "\\%o",
(unsigned char) argv[0][i]);
obstack_grow (&obstack, tmp, strlen (tmp));
}
break;
}
}
obstack_1grow (&obstack, '\"');
/* Apply other argv to FORMAT. */
for (i = 1; i < argc; i++)
{
obstack_1grow (&obstack, ',');
obstack_grow (&obstack, argv[i], strlen (argv[i]));
}
obstack_1grow (&obstack, '\0');
ret = xstrdup ((const char *) obstack_finish (&obstack));
obstack_free (&obstack, NULL);
return ret;
}
/* Insert breakpoint.
If dprintf is true, it will insert dprintf.
If not, it will insert other type breakpoint. */
static void
mi_cmd_break_insert_1 (int dprintf, char *command, char **argv, int argc)
{
char *address = NULL;
int hardware = 0;
int temp_p = 0;
int thread = -1;
int ignore_count = 0;
char *condition = NULL;
int pending = 0;
int enabled = 1;
int tracepoint = 0;
struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
enum bptype type_wanted;
struct event_location *location;
struct breakpoint_ops *ops;
int is_explicit = 0;
struct explicit_location explicit_loc;
char *extra_string = NULL;
enum opt
{
HARDWARE_OPT, TEMP_OPT, CONDITION_OPT,
IGNORE_COUNT_OPT, THREAD_OPT, PENDING_OPT, DISABLE_OPT,
TRACEPOINT_OPT,
EXPLICIT_SOURCE_OPT, EXPLICIT_FUNC_OPT,
EXPLICIT_LABEL_OPT, EXPLICIT_LINE_OPT
};
static const struct mi_opt opts[] =
{
{"h", HARDWARE_OPT, 0},
{"t", TEMP_OPT, 0},
{"c", CONDITION_OPT, 1},
{"i", IGNORE_COUNT_OPT, 1},
{"p", THREAD_OPT, 1},
{"f", PENDING_OPT, 0},
{"d", DISABLE_OPT, 0},
{"a", TRACEPOINT_OPT, 0},
{"-source" , EXPLICIT_SOURCE_OPT, 1},
{"-function", EXPLICIT_FUNC_OPT, 1},
{"-label", EXPLICIT_LABEL_OPT, 1},
{"-line", EXPLICIT_LINE_OPT, 1},
{ 0, 0, 0 }
};
/* Parse arguments. It could be -r or -h or -t, <location> or ``--''
to denote the end of the option list. */
int oind = 0;
char *oarg;
initialize_explicit_location (&explicit_loc);
while (1)
{
int opt = mi_getopt ("-break-insert", argc, argv,
opts, &oind, &oarg);
if (opt < 0)
break;
switch ((enum opt) opt)
{
case TEMP_OPT:
temp_p = 1;
break;
case HARDWARE_OPT:
hardware = 1;
break;
case CONDITION_OPT:
condition = oarg;
break;
case IGNORE_COUNT_OPT:
ignore_count = atol (oarg);
break;
case THREAD_OPT:
thread = atol (oarg);
break;
case PENDING_OPT:
pending = 1;
break;
case DISABLE_OPT:
enabled = 0;
break;
case TRACEPOINT_OPT:
tracepoint = 1;
break;
case EXPLICIT_SOURCE_OPT:
is_explicit = 1;
explicit_loc.source_filename = oarg;
break;
case EXPLICIT_FUNC_OPT:
is_explicit = 1;
explicit_loc.function_name = oarg;
break;
case EXPLICIT_LABEL_OPT:
is_explicit = 1;
explicit_loc.label_name = oarg;
break;
case EXPLICIT_LINE_OPT:
is_explicit = 1;
explicit_loc.line_offset = linespec_parse_line_offset (oarg);
break;
}
}
if (oind >= argc && !is_explicit)
error (_("-%s-insert: Missing <location>"),
dprintf ? "dprintf" : "break");
if (dprintf)
{
int format_num = is_explicit ? oind : oind + 1;
if (hardware || tracepoint)
error (_("-dprintf-insert: does not support -h or -a"));
if (format_num >= argc)
error (_("-dprintf-insert: Missing <format>"));
extra_string = mi_argv_to_format (argv + format_num, argc - format_num);
make_cleanup (xfree, extra_string);
address = argv[oind];
}
else
{
if (is_explicit)
{
if (oind < argc)
error (_("-break-insert: Garbage following explicit location"));
}
else
{
if (oind < argc - 1)
error (_("-break-insert: Garbage following <location>"));
address = argv[oind];
}
}
/* Now we have what we need, let's insert the breakpoint! */
setup_breakpoint_reporting ();
if (tracepoint)
{
/* Note that to request a fast tracepoint, the client uses the
"hardware" flag, although there's nothing of hardware related to
fast tracepoints -- one can implement slow tracepoints with
hardware breakpoints, but fast tracepoints are always software.
"fast" is a misnomer, actually, "jump" would be more appropriate.
A simulator or an emulator could conceivably implement fast
regular non-jump based tracepoints. */
type_wanted = hardware ? bp_fast_tracepoint : bp_tracepoint;
ops = &tracepoint_breakpoint_ops;
}
else if (dprintf)
{
type_wanted = bp_dprintf;
ops = &dprintf_breakpoint_ops;
}
else
{
type_wanted = hardware ? bp_hardware_breakpoint : bp_breakpoint;
ops = &bkpt_breakpoint_ops;
}
if (is_explicit)
{
/* Error check -- we must have one of the other
parameters specified. */
if (explicit_loc.source_filename != NULL
&& explicit_loc.function_name == NULL
&& explicit_loc.label_name == NULL
&& explicit_loc.line_offset.sign == LINE_OFFSET_UNKNOWN)
error (_("-%s-insert: --source option requires --function, --label,"
" or --line"), dprintf ? "dprintf" : "break");
location = new_explicit_location (&explicit_loc);
}
else
{
location = string_to_event_location_basic (&address, current_language);
if (*address)
{
delete_event_location (location);
error (_("Garbage '%s' at end of location"), address);
}
}
make_cleanup_delete_event_location (location);
create_breakpoint (get_current_arch (), location, condition, thread,
extra_string,
0 /* condition and thread are valid. */,
temp_p, type_wanted,
ignore_count,
pending ? AUTO_BOOLEAN_TRUE : AUTO_BOOLEAN_FALSE,
ops, 0, enabled, 0, 0);
do_cleanups (back_to);
}
/* Implements the -break-insert command.
See the MI manual for the list of possible options. */
void
mi_cmd_break_insert (char *command, char **argv, int argc)
{
mi_cmd_break_insert_1 (0, command, argv, argc);
}
/* Implements the -dprintf-insert command.
See the MI manual for the list of possible options. */
void
mi_cmd_dprintf_insert (char *command, char **argv, int argc)
{
mi_cmd_break_insert_1 (1, command, argv, argc);
}
enum wp_type
{
REG_WP,
READ_WP,
ACCESS_WP
};
void
mi_cmd_break_passcount (char *command, char **argv, int argc)
{
int n;
int p;
struct tracepoint *t;
if (argc != 2)
error (_("Usage: tracepoint-number passcount"));
n = atoi (argv[0]);
p = atoi (argv[1]);
t = get_tracepoint (n);
if (t)
{
t->pass_count = p;
observer_notify_breakpoint_modified (&t->base);
}
else
{
error (_("Could not find tracepoint %d"), n);
}
}
/* Insert a watchpoint. The type of watchpoint is specified by the
first argument:
-break-watch <expr> --> insert a regular wp.
-break-watch -r <expr> --> insert a read watchpoint.
-break-watch -a <expr> --> insert an access wp. */
void
mi_cmd_break_watch (char *command, char **argv, int argc)
{
char *expr = NULL;
enum wp_type type = REG_WP;
enum opt
{
READ_OPT, ACCESS_OPT
};
static const struct mi_opt opts[] =
{
{"r", READ_OPT, 0},
{"a", ACCESS_OPT, 0},
{ 0, 0, 0 }
};
/* Parse arguments. */
int oind = 0;
char *oarg;
while (1)
{
int opt = mi_getopt ("-break-watch", argc, argv,
opts, &oind, &oarg);
if (opt < 0)
break;
switch ((enum opt) opt)
{
case READ_OPT:
type = READ_WP;
break;
case ACCESS_OPT:
type = ACCESS_WP;
break;
}
}
if (oind >= argc)
error (_("-break-watch: Missing <expression>"));
if (oind < argc - 1)
error (_("-break-watch: Garbage following <expression>"));
expr = argv[oind];
/* Now we have what we need, let's insert the watchpoint! */
switch (type)
{
case REG_WP:
watch_command_wrapper (expr, FROM_TTY, 0);
break;
case READ_WP:
rwatch_command_wrapper (expr, FROM_TTY, 0);
break;
case ACCESS_WP:
awatch_command_wrapper (expr, FROM_TTY, 0);
break;
default:
error (_("-break-watch: Unknown watchpoint type."));
}
}
/* The mi_read_next_line consults these variable to return successive
command lines. While it would be clearer to use a closure pointer,
it is not expected that any future code will use read_command_lines_1,
therefore no point of overengineering. */
static char **mi_command_line_array;
static int mi_command_line_array_cnt;
static int mi_command_line_array_ptr;
static char *
mi_read_next_line (void)
{
if (mi_command_line_array_ptr == mi_command_line_array_cnt)
return NULL;
else
return mi_command_line_array[mi_command_line_array_ptr++];
}
void
mi_cmd_break_commands (char *command, char **argv, int argc)
{
struct command_line *break_command;
char *endptr;
int bnum;
struct breakpoint *b;
if (argc < 1)
error (_("USAGE: %s <BKPT> [<COMMAND> [<COMMAND>...]]"), command);
bnum = strtol (argv[0], &endptr, 0);
if (endptr == argv[0])
error (_("breakpoint number argument \"%s\" is not a number."),
argv[0]);
else if (*endptr != '\0')
error (_("junk at the end of breakpoint number argument \"%s\"."),
argv[0]);
b = get_breakpoint (bnum);
if (b == NULL)
error (_("breakpoint %d not found."), bnum);
mi_command_line_array = argv;
mi_command_line_array_ptr = 1;
mi_command_line_array_cnt = argc;
if (is_tracepoint (b))
break_command = read_command_lines_1 (mi_read_next_line, 1,
check_tracepoint_command, b);
else
break_command = read_command_lines_1 (mi_read_next_line, 1, 0, 0);
breakpoint_set_commands (b, break_command);
}
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