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PR gdb/1535:
	* breakpoint.c (CATCH_PERMANENT, CATCH_TEMPORARY): New macros.
	(ep_find_event_name_end): Remove.
	(catch_fork_temporary, catch_vfork_temporary,
	catch_fork_permanent, catch_vfork_permanent): New constants.
	(catch_vfork, catch_fork): Remove.
	(catch_fork_command_1): Add 'command' argument.  Remove
	'fork_kind' and 'tempflag'.  Handle NULL 'arg'.  Update switch for
	all cases.
	(catch_exec_command_1): Add 'command' argument; remove
	'tempflag'.  Handle NULL 'arg'.
	(catch_load_command_1): Likewise.
	(catch_unload_command_1): Likewise.
	(catch_ada_exception_command): Likewise.
	(catch_assert_command): Likewise.
	(catch_catch_command): New function.
	(catch_throw_command): Likewise.
	(catch_command_1): Remove.
	(catch_command): Just call error.
	(tcatch_command): Likewise.
	(catch_cmdlist): New global.
	(tcatch_cmdlist): Likewise.
	(add_catch_command): New function.
	(_initialize_breakpoint): Create "catch" and "tcatch" as prefix
	commands.  Create all catch sub-commands.
gdb/testsuite:
	* gdb.base/help.exp (help catch): Rewrite.
This commit is contained in:
Tom Tromey 2008-08-17 16:58:17 +00:00
parent 5c1d2f5f4c
commit 44feb3ce38
4 changed files with 192 additions and 202 deletions
Download patch file Download diff file Expand all files Collapse all files

28
gdb/ChangeLog
View file

@ -1,3 +1,31 @@
2008-08-17 Tom Tromey <tromey@redhat.com>
PR gdb/1535:
* breakpoint.c (CATCH_PERMANENT, CATCH_TEMPORARY): New macros.
(ep_find_event_name_end): Remove.
(catch_fork_temporary, catch_vfork_temporary,
catch_fork_permanent, catch_vfork_permanent): New constants.
(catch_vfork, catch_fork): Remove.
(catch_fork_command_1): Add 'command' argument. Remove
'fork_kind' and 'tempflag'. Handle NULL 'arg'. Update switch for
all cases.
(catch_exec_command_1): Add 'command' argument; remove
'tempflag'. Handle NULL 'arg'.
(catch_load_command_1): Likewise.
(catch_unload_command_1): Likewise.
(catch_ada_exception_command): Likewise.
(catch_assert_command): Likewise.
(catch_catch_command): New function.
(catch_throw_command): Likewise.
(catch_command_1): Remove.
(catch_command): Just call error.
(tcatch_command): Likewise.
(catch_cmdlist): New global.
(tcatch_cmdlist): Likewise.
(add_catch_command): New function.
(_initialize_breakpoint): Create "catch" and "tcatch" as prefix
commands. Create all catch sub-commands.
2008-08-17 Pedro Alves <pedro@codesourcery.com> 2008-08-17 Pedro Alves <pedro@codesourcery.com>
* gdbthread.h: Add comments. * gdbthread.h: Add comments.

360
gdb/breakpoint.c
View file

@ -59,9 +59,11 @@
#include "mi/mi-common.h" #include "mi/mi-common.h"
/* Prototypes for local functions. */ /* Arguments to pass as context to some catch command handlers. */
#define CATCH_PERMANENT ((void *) (uintptr_t) 0)
#define CATCH_TEMPORARY ((void *) (uintptr_t) 1)
static void catch_command_1 (char *, int, int); /* Prototypes for local functions. */
static void enable_delete_command (char *, int); static void enable_delete_command (char *, int);
@ -167,8 +169,6 @@ static void stopin_command (char *arg, int from_tty);
static void stopat_command (char *arg, int from_tty); static void stopat_command (char *arg, int from_tty);
static char *ep_find_event_name_end (char *arg);
static char *ep_parse_optional_if_clause (char **arg); static char *ep_parse_optional_if_clause (char **arg);
static char *ep_parse_optional_filename (char **arg); static char *ep_parse_optional_filename (char **arg);
@ -6274,36 +6274,6 @@ ep_skip_leading_whitespace (char **s)
*s += 1; *s += 1;
} }
/* This function examines a string, and attempts to find a token
that might be an event name in the leading characters. If a
possible match is found, a pointer to the last character of
the token is returned. Else, NULL is returned. */
static char *
ep_find_event_name_end (char *arg)
{
char *s = arg;
char *event_name_end = NULL;
/* If we could depend upon the presense of strrpbrk, we'd use that... */
if (arg == NULL)
return NULL;
/* We break out of the loop when we find a token delimiter.
Basically, we're looking for alphanumerics and underscores;
anything else delimites the token. */
while (*s != '\0')
{
if (!isalnum (*s) && (*s != '_'))
break;
event_name_end = s;
s++;
}
return event_name_end;
}
/* This function attempts to parse an optional "if <cond>" clause /* This function attempts to parse an optional "if <cond>" clause
from the arg string. If one is not found, it returns NULL. from the arg string. If one is not found, it returns NULL.
@ -6375,16 +6345,24 @@ ep_parse_optional_filename (char **arg)
typedef enum typedef enum
{ {
catch_fork, catch_vfork catch_fork_temporary, catch_vfork_temporary,
catch_fork_permanent, catch_vfork_permanent
} }
catch_fork_kind; catch_fork_kind;
static void static void
catch_fork_command_1 (catch_fork_kind fork_kind, char *arg, int tempflag, catch_fork_command_1 (char *arg, int from_tty, struct cmd_list_element *command)
int from_tty)
{ {
char *cond_string = NULL; char *cond_string = NULL;
catch_fork_kind fork_kind;
int tempflag;
fork_kind = (catch_fork_kind) (uintptr_t) get_cmd_context (command);
tempflag = (fork_kind == catch_fork_temporary
|| fork_kind == catch_vfork_temporary);
if (!arg)
arg = "";
ep_skip_leading_whitespace (&arg); ep_skip_leading_whitespace (&arg);
/* The allowed syntax is: /* The allowed syntax is:
@ -6401,10 +6379,12 @@ catch_fork_command_1 (catch_fork_kind fork_kind, char *arg, int tempflag,
and enable reporting of such events. */ and enable reporting of such events. */
switch (fork_kind) switch (fork_kind)
{ {
case catch_fork: case catch_fork_temporary:
case catch_fork_permanent:
create_fork_event_catchpoint (tempflag, cond_string); create_fork_event_catchpoint (tempflag, cond_string);
break; break;
case catch_vfork: case catch_vfork_temporary:
case catch_vfork_permanent:
create_vfork_event_catchpoint (tempflag, cond_string); create_vfork_event_catchpoint (tempflag, cond_string);
break; break;
default: default:
@ -6414,10 +6394,15 @@ catch_fork_command_1 (catch_fork_kind fork_kind, char *arg, int tempflag,
} }
static void static void
catch_exec_command_1 (char *arg, int tempflag, int from_tty) catch_exec_command_1 (char *arg, int from_tty, struct cmd_list_element *command)
{ {
int tempflag;
char *cond_string = NULL; char *cond_string = NULL;
tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
if (!arg)
arg = "";
ep_skip_leading_whitespace (&arg); ep_skip_leading_whitespace (&arg);
/* The allowed syntax is: /* The allowed syntax is:
@ -6436,11 +6421,16 @@ catch_exec_command_1 (char *arg, int tempflag, int from_tty)
} }
static void static void
catch_load_command_1 (char *arg, int tempflag, int from_tty) catch_load_command_1 (char *arg, int from_tty, struct cmd_list_element *command)
{ {
int tempflag;
char *dll_pathname = NULL; char *dll_pathname = NULL;
char *cond_string = NULL; char *cond_string = NULL;
tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
if (!arg)
arg = "";
ep_skip_leading_whitespace (&arg); ep_skip_leading_whitespace (&arg);
/* The allowed syntax is: /* The allowed syntax is:
@ -6478,11 +6468,17 @@ catch_load_command_1 (char *arg, int tempflag, int from_tty)
} }
static void static void
catch_unload_command_1 (char *arg, int tempflag, int from_tty) catch_unload_command_1 (char *arg, int from_tty,
struct cmd_list_element *command)
{ {
int tempflag;
char *dll_pathname = NULL; char *dll_pathname = NULL;
char *cond_string = NULL; char *cond_string = NULL;
tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
if (!arg)
arg = "";
ep_skip_leading_whitespace (&arg); ep_skip_leading_whitespace (&arg);
/* The allowed syntax is: /* The allowed syntax is:
@ -6621,6 +6617,8 @@ catch_exception_command_1 (enum exception_event_kind ex_event, char *arg,
char *cond_string = NULL; char *cond_string = NULL;
struct symtab_and_line *sal = NULL; struct symtab_and_line *sal = NULL;
if (!arg)
arg = "";
ep_skip_leading_whitespace (&arg); ep_skip_leading_whitespace (&arg);
cond_string = ep_parse_optional_if_clause (&arg); cond_string = ep_parse_optional_if_clause (&arg);
@ -6638,6 +6636,24 @@ catch_exception_command_1 (enum exception_event_kind ex_event, char *arg,
warning (_("Unsupported with this platform/compiler combination.")); warning (_("Unsupported with this platform/compiler combination."));
} }
/* Implementation of "catch catch" command. */
static void
catch_catch_command (char *arg, int from_tty, struct cmd_list_element *command)
{
int tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
catch_exception_command_1 (EX_EVENT_CATCH, arg, tempflag, from_tty);
}
/* Implementation of "catch throw" command. */
static void
catch_throw_command (char *arg, int from_tty, struct cmd_list_element *command)
{
int tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
catch_exception_command_1 (EX_EVENT_THROW, arg, tempflag, from_tty);
}
/* Create a breakpoint struct for Ada exception catchpoints. */ /* Create a breakpoint struct for Ada exception catchpoints. */
static void static void
@ -6687,8 +6703,10 @@ create_ada_exception_breakpoint (struct symtab_and_line sal,
/* Implement the "catch exception" command. */ /* Implement the "catch exception" command. */
static void static void
catch_ada_exception_command (char *arg, int tempflag, int from_tty) catch_ada_exception_command (char *arg, int from_tty,
struct cmd_list_element *command)
{ {
int tempflag;
struct symtab_and_line sal; struct symtab_and_line sal;
enum bptype type; enum bptype type;
char *addr_string = NULL; char *addr_string = NULL;
@ -6697,6 +6715,10 @@ catch_ada_exception_command (char *arg, int tempflag, int from_tty)
struct expression *cond = NULL; struct expression *cond = NULL;
struct breakpoint_ops *ops = NULL; struct breakpoint_ops *ops = NULL;
tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
if (!arg)
arg = "";
sal = ada_decode_exception_location (arg, &addr_string, &exp_string, sal = ada_decode_exception_location (arg, &addr_string, &exp_string,
&cond_string, &cond, &ops); &cond_string, &cond, &ops);
create_ada_exception_breakpoint (sal, addr_string, exp_string, create_ada_exception_breakpoint (sal, addr_string, exp_string,
@ -6707,138 +6729,33 @@ catch_ada_exception_command (char *arg, int tempflag, int from_tty)
/* Implement the "catch assert" command. */ /* Implement the "catch assert" command. */
static void static void
catch_assert_command (char *arg, int tempflag, int from_tty) catch_assert_command (char *arg, int from_tty, struct cmd_list_element *command)
{ {
int tempflag;
struct symtab_and_line sal; struct symtab_and_line sal;
char *addr_string = NULL; char *addr_string = NULL;
struct breakpoint_ops *ops = NULL; struct breakpoint_ops *ops = NULL;
tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
if (!arg)
arg = "";
sal = ada_decode_assert_location (arg, &addr_string, &ops); sal = ada_decode_assert_location (arg, &addr_string, &ops);
create_ada_exception_breakpoint (sal, addr_string, NULL, NULL, NULL, ops, create_ada_exception_breakpoint (sal, addr_string, NULL, NULL, NULL, ops,
tempflag, from_tty); tempflag, from_tty);
} }
static void
catch_command_1 (char *arg, int tempflag, int from_tty)
{
/* The first argument may be an event name, such as "start" or "load".
If so, then handle it as such. If it doesn't match an event name,
then attempt to interpret it as an exception name. (This latter is
the v4.16-and-earlier GDB meaning of the "catch" command.)
First, try to find the bounds of what might be an event name. */
char *arg1_start = arg;
char *arg1_end;
int arg1_length;
if (arg1_start == NULL)
{
/* Old behaviour was to use pre-v-4.16 syntax */
/* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
/* return; */
/* Now, this is not allowed */
error (_("Catch requires an event name."));
}
arg1_end = ep_find_event_name_end (arg1_start);
if (arg1_end == NULL)
error (_("catch requires an event"));
arg1_length = arg1_end + 1 - arg1_start;
/* Try to match what we found against known event names. */
if (strncmp (arg1_start, "signal", arg1_length) == 0)
{
error (_("Catch of signal not yet implemented"));
}
else if (strncmp (arg1_start, "catch", arg1_length) == 0)
{
catch_exception_command_1 (EX_EVENT_CATCH, arg1_end + 1,
tempflag, from_tty);
}
else if (strncmp (arg1_start, "throw", arg1_length) == 0)
{
catch_exception_command_1 (EX_EVENT_THROW, arg1_end + 1,
tempflag, from_tty);
}
else if (strncmp (arg1_start, "thread_start", arg1_length) == 0)
{
error (_("Catch of thread_start not yet implemented"));
}
else if (strncmp (arg1_start, "thread_exit", arg1_length) == 0)
{
error (_("Catch of thread_exit not yet implemented"));
}
else if (strncmp (arg1_start, "thread_join", arg1_length) == 0)
{
error (_("Catch of thread_join not yet implemented"));
}
else if (strncmp (arg1_start, "start", arg1_length) == 0)
{
error (_("Catch of start not yet implemented"));
}
else if (strncmp (arg1_start, "exit", arg1_length) == 0)
{
error (_("Catch of exit not yet implemented"));
}
else if (strncmp (arg1_start, "fork", arg1_length) == 0)
{
catch_fork_command_1 (catch_fork, arg1_end + 1, tempflag, from_tty);
}
else if (strncmp (arg1_start, "vfork", arg1_length) == 0)
{
catch_fork_command_1 (catch_vfork, arg1_end + 1, tempflag, from_tty);
}
else if (strncmp (arg1_start, "exec", arg1_length) == 0)
{
catch_exec_command_1 (arg1_end + 1, tempflag, from_tty);
}
else if (strncmp (arg1_start, "load", arg1_length) == 0)
{
catch_load_command_1 (arg1_end + 1, tempflag, from_tty);
}
else if (strncmp (arg1_start, "unload", arg1_length) == 0)
{
catch_unload_command_1 (arg1_end + 1, tempflag, from_tty);
}
else if (strncmp (arg1_start, "stop", arg1_length) == 0)
{
error (_("Catch of stop not yet implemented"));
}
else if (strncmp (arg1_start, "exception", arg1_length) == 0)
{
catch_ada_exception_command (arg1_end + 1, tempflag, from_tty);
}
else if (strncmp (arg1_start, "assert", arg1_length) == 0)
{
catch_assert_command (arg1_end + 1, tempflag, from_tty);
}
/* This doesn't appear to be an event name */
else
{
/* Pre-v.4.16 behaviour was to treat the argument
as the name of an exception */
/* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
/* Now this is not allowed */
error (_("Unknown event kind specified for catch"));
}
}
static void static void
catch_command (char *arg, int from_tty) catch_command (char *arg, int from_tty)
{ {
catch_command_1 (arg, 0, from_tty); error (_("Catch requires an event name."));
} }
static void static void
tcatch_command (char *arg, int from_tty) tcatch_command (char *arg, int from_tty)
{ {
catch_command_1 (arg, 1, from_tty); error (_("Catch requires an event name."));
} }
/* Delete breakpoints by address or line. */ /* Delete breakpoints by address or line. */
@ -8240,6 +8157,34 @@ Multiple breakpoints at one place are permitted, and useful if conditional.\n\
\n\ \n\
Do \"help breakpoints\" for info on other commands dealing with breakpoints." Do \"help breakpoints\" for info on other commands dealing with breakpoints."
/* List of subcommands for "catch". */
static struct cmd_list_element *catch_cmdlist;
/* List of subcommands for "tcatch". */
static struct cmd_list_element *tcatch_cmdlist;
/* Like add_cmd, but add the command to both the "catch" and "tcatch"
lists, and pass some additional user data to the command function. */
static void
add_catch_command (char *name, char *docstring,
void (*sfunc) (char *args, int from_tty,
struct cmd_list_element *command),
void *user_data_catch,
void *user_data_tcatch)
{
struct cmd_list_element *command;
command = add_cmd (name, class_breakpoint, NULL, docstring,
&catch_cmdlist);
set_cmd_sfunc (command, sfunc);
set_cmd_context (command, user_data_catch);
command = add_cmd (name, class_breakpoint, NULL, docstring,
&tcatch_cmdlist);
set_cmd_sfunc (command, sfunc);
set_cmd_context (command, user_data_tcatch);
}
void void
_initialize_breakpoint (void) _initialize_breakpoint (void)
{ {
@ -8497,52 +8442,65 @@ Convenience variable \"$bpnum\" contains the number of the last\n\
breakpoint set."), breakpoint set."),
&maintenanceinfolist); &maintenanceinfolist);
add_com ("catch", class_breakpoint, catch_command, _("\ add_prefix_cmd ("catch", class_breakpoint, catch_command, _("\
Set catchpoints to catch events.\n\ Set catchpoints to catch events."),
Raised signals may be caught:\n\ &catch_cmdlist, "catch ",
\tcatch signal - all signals\n\ 0/*allow-unknown*/, &cmdlist);
\tcatch signal <signame> - a particular signal\n\
Raised exceptions may be caught:\n\
\tcatch throw - all exceptions, when thrown\n\
\tcatch throw <exceptname> - a particular exception, when thrown\n\
\tcatch catch - all exceptions, when caught\n\
\tcatch catch <exceptname> - a particular exception, when caught\n\
Thread or process events may be caught:\n\
\tcatch thread_start - any threads, just after creation\n\
\tcatch thread_exit - any threads, just before expiration\n\
\tcatch thread_join - any threads, just after joins\n\
Process events may be caught:\n\
\tcatch start - any processes, just after creation\n\
\tcatch exit - any processes, just before expiration\n\
\tcatch fork - calls to fork()\n\
\tcatch vfork - calls to vfork()\n\
\tcatch exec - calls to exec()\n\
Dynamically-linked library events may be caught:\n\
\tcatch load - loads of any library\n\
\tcatch load <libname> - loads of a particular library\n\
\tcatch unload - unloads of any library\n\
\tcatch unload <libname> - unloads of a particular library\n\
The act of your program's execution stopping may also be caught:\n\
\tcatch stop\n\n\
C++ exceptions may be caught:\n\
\tcatch throw - all exceptions, when thrown\n\
\tcatch catch - all exceptions, when caught\n\
Ada exceptions may be caught:\n\
\tcatch exception - all exceptions, when raised\n\
\tcatch exception <name> - a particular exception, when raised\n\
\tcatch exception unhandled - all unhandled exceptions, when raised\n\
\tcatch assert - all failed assertions, when raised\n\
\n\
Do \"help set follow-fork-mode\" for info on debugging your program\n\
after a fork or vfork is caught.\n\n\
Do \"help breakpoints\" for info on other commands dealing with breakpoints."));
add_com ("tcatch", class_breakpoint, tcatch_command, _("\ add_prefix_cmd ("tcatch", class_breakpoint, tcatch_command, _("\
Set temporary catchpoints to catch events.\n\ Set temporary catchpoints to catch events."),
Args like \"catch\" command.\n\ &tcatch_cmdlist, "tcatch ",
Like \"catch\" except the catchpoint is only temporary,\n\ 0/*allow-unknown*/, &cmdlist);
so it will be deleted when hit. Equivalent to \"catch\" followed\n\
by using \"enable delete\" on the catchpoint number.")); /* Add catch and tcatch sub-commands. */
add_catch_command ("catch", _("\
Catch an exception, when caught.\n\
With an argument, catch only exceptions with the given name."),
catch_catch_command,
CATCH_PERMANENT,
CATCH_TEMPORARY);
add_catch_command ("throw", _("\
Catch an exception, when thrown.\n\
With an argument, catch only exceptions with the given name."),
catch_throw_command,
CATCH_PERMANENT,
CATCH_TEMPORARY);
add_catch_command ("fork", _("Catch calls to fork."),
catch_fork_command_1,
(void *) (uintptr_t) catch_fork_permanent,
(void *) (uintptr_t) catch_fork_temporary);
add_catch_command ("vfork", _("Catch calls to vfork."),
catch_fork_command_1,
(void *) (uintptr_t) catch_vfork_permanent,
(void *) (uintptr_t) catch_vfork_temporary);
add_catch_command ("exec", _("Catch calls to exec."),
catch_exec_command_1,
CATCH_PERMANENT,
CATCH_TEMPORARY);
add_catch_command ("load", _("\
Catch library loads.\n\
With an argument, catch only loads of that library."),
catch_load_command_1,
CATCH_PERMANENT,
CATCH_TEMPORARY);
add_catch_command ("unload", _("\
Catch library unloads.\n\
With an argument, catch only unloads of that library."),
catch_unload_command_1,
CATCH_PERMANENT,
CATCH_TEMPORARY);
add_catch_command ("exception", _("\
Catch Ada exceptions, when raised.\n\
With an argument, catch only exceptions with the given name."),
catch_ada_exception_command,
CATCH_PERMANENT,
CATCH_TEMPORARY);
add_catch_command ("assert", _("\
Catch failed Ada assertions, when raised.\n\
With an argument, catch only exceptions with the given name."),
catch_assert_command,
CATCH_PERMANENT,
CATCH_TEMPORARY);
c = add_com ("watch", class_breakpoint, watch_command, _("\ c = add_com ("watch", class_breakpoint, watch_command, _("\
Set a watchpoint for an expression.\n\ Set a watchpoint for an expression.\n\

4
gdb/testsuite/ChangeLog
View file

@ -1,3 +1,7 @@
2008-08-17 Tom Tromey <tromey@redhat.com>
* gdb.base/help.exp (help catch): Rewrite.
2008-08-16 Thiago Jung Bauermann <bauerman@br.ibm.com> 2008-08-16 Thiago Jung Bauermann <bauerman@br.ibm.com>
* gdb.base/define.exp: Test indented command documentation. * gdb.base/define.exp: Test indented command documentation.

2
gdb/testsuite/gdb.base/help.exp
View file

@ -68,7 +68,7 @@ gdb_test "help continue" "Continue program being debugged.*" "help continue"
# test help call # test help call
gdb_test "help call" "Call a function.*" "help call" gdb_test "help call" "Call a function.*" "help call"
# test help catch # test help catch
gdb_test "help catch" "Set catchpoints to catch events.*Raised signals may be caught:.*catch signal.*all signals.*catch signal.*signame.*a particular signal.*Raised exceptions may be caught:.*catch throw.*all exceptions, when thrown.*catch throw.*exceptname.*a particular exception, when thrown.*catch catch.*all exceptions, when caught.*catch catch.*exceptname.*a particular exception, when caught.*Thread or process events may be caught:.*catch thread_start.*any threads, just after creation.*catch thread_exit.*any threads, just before expiration.*catch thread_join.*any threads, just after joins.*catch start.*any processes, just after creation.*catch exit.*any processes, just before expiration.*catch fork.*calls to fork.*catch vfork.*calls to vfork.*catch exec.*calls to exec.*Dynamically.linked library events may be caught:.*catch load.*loads of any library.*catch load.*libname.*loads of a particular library.*catch unload.*unloads of any library.*catch unload.*libname.*unloads of a particular library.*The act of your program's execution stopping may also be caught:.*catch stop.*Do.*help set follow-fork-mode.*for info on debugging your program.*after a fork or vfork is caught.*Do.*help breakpoints.*for info on other commands dealing with breakpoints." "help catch" gdb_test "help catch" "Set catchpoints to catch events.*List of catch subcommands:.*catch assert -- Catch failed Ada assertions.*catch catch -- Catch an exception.*catch exception -- Catch Ada exceptions.*catch exec -- Catch calls to exec.*catch fork -- Catch calls to fork.*catch load -- Catch library loads.*catch throw -- Catch an exception.*catch unload -- Catch library unloads.*catch vfork -- Catch calls to vfork.*Type .help catch. followed by catch subcommand name for full documentation.*Type .apropos word. to search for commands related to .word..*Command name abbreviations are allowed if unambiguous.*" "help catch"
# test help cd # test help cd
gdb_test "help cd" "Set working directory to DIR for debugger and program being debugged\.\[\r\n\]+The change does not take effect for the program being debugged\[\r\n\]+until the next time it is started\." "help cd" gdb_test "help cd" "Set working directory to DIR for debugger and program being debugged\.\[\r\n\]+The change does not take effect for the program being debugged\[\r\n\]+until the next time it is started\." "help cd"
# test help clear # test help clear