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Change ada_catchpoint::excep_string to be a std::string

Browse Source 
This changes ada_catchpoint::excep_string to be a std::string and then
fixes up all t he users.

This found a memory leak in catch_ada_exception_command_split, where
"cond" was copied but never freed.

I changed the type of the "cond_string" argument to
catch_ada_exception_command_split to follow the rule that out
parameters should be pointers and not references.

This patch enables the removal of some cleanups and also the function
ada_get_next_arg.

ChangeLog
2018-05-21  Tom Tromey  <tom@tromey.com>

	* mi/mi-cmd-catch.c (mi_cmd_catch_assert)
	(mi_cmd_catch_exception, mi_cmd_catch_handlers): Update.
	* ada-lang.h (create_ada_exception_catchpoint): Update.
	* ada-lang.c (struct ada_catchpoint) <excep_string>: Now a
	std::string.
	(create_excep_cond_exprs, ~ada_catchpoint)
	(should_stop_exception, print_one_exception)
	(print_mention_exception, print_recreate_exception): Update.
	(ada_get_next_arg): Remove.
	(catch_ada_exception_command_split): Use std::string.  Change type
	of "excep_string", "cond_string".
	(catch_ada_exception_command): Update.
	(create_ada_exception_catchpoint): Change type of excep_string.
	(ada_exception_sal): Remove excep_string parameter.
	(~ada_catchpoint): Remove.
This commit is contained in:
Tom Tromey 2018-05-18 15:58:50 -06:00
parent 790217f673
commit bc18fbb575
4 changed files with 60 additions and 110 deletions
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18
gdb/ChangeLog
View File

@ -1,3 +1,21 @@
2018-05-21 Tom Tromey <tom@tromey.com>
* mi/mi-cmd-catch.c (mi_cmd_catch_assert)
(mi_cmd_catch_exception, mi_cmd_catch_handlers): Update.
* ada-lang.h (create_ada_exception_catchpoint): Update.
* ada-lang.c (struct ada_catchpoint) <excep_string>: Now a
std::string.
(create_excep_cond_exprs, ~ada_catchpoint)
(should_stop_exception, print_one_exception)
(print_mention_exception, print_recreate_exception): Update.
(ada_get_next_arg): Remove.
(catch_ada_exception_command_split): Use std::string. Change type
of "excep_string", "cond_string".
(catch_ada_exception_command): Update.
(create_ada_exception_catchpoint): Change type of excep_string.
(ada_exception_sal): Remove excep_string parameter.
(~ada_catchpoint): Remove.
2018-05-21 Tom Tromey <tom@tromey.com>
* ada-lang.c (ada_collect_symbol_completion_matches): Remove

132
gdb/ada-lang.c
View File

@ -12476,10 +12476,8 @@ static const struct bp_location_ops ada_catchpoint_location_ops =
struct ada_catchpoint : public breakpoint
{
~ada_catchpoint () override;
/* The name of the specific exception the user specified. */
char *excep_string;
std::string excep_string;
};
/* Parse the exception condition string in the context of each of the
@ -12492,7 +12490,7 @@ create_excep_cond_exprs (struct ada_catchpoint *c,
struct bp_location *bl;
/* Nothing to do if there's no specific exception to catch. */
if (c->excep_string == NULL)
if (c->excep_string.empty ())
return;
/* Same if there are no locations... */
@ -12502,7 +12500,7 @@ create_excep_cond_exprs (struct ada_catchpoint *c,
/* Compute the condition expression in text form, from the specific
expection we want to catch. */
std::string cond_string
= ada_exception_catchpoint_cond_string (c->excep_string, ex);
= ada_exception_catchpoint_cond_string (c->excep_string.c_str (), ex);
/* Iterate over all the catchpoint's locations, and parse an
expression for each. */
@ -12536,13 +12534,6 @@ create_excep_cond_exprs (struct ada_catchpoint *c,
}
}
/* ada_catchpoint destructor. */
ada_catchpoint::~ada_catchpoint ()
{
xfree (this->excep_string);
}
/* Implement the ALLOCATE_LOCATION method in the breakpoint_ops
structure for all exception catchpoint kinds. */
@ -12583,7 +12574,7 @@ should_stop_exception (const struct bp_location *bl)
int stop;
/* With no specific exception, should always stop. */
if (c->excep_string == NULL)
if (c->excep_string.empty ())
return 1;
if (ada_loc->excep_cond_expr == NULL)
@ -12733,12 +12724,12 @@ print_one_exception (enum ada_exception_catchpoint_kind ex,
switch (ex)
{
case ada_catch_exception:
if (c->excep_string != NULL)
if (!c->excep_string.empty ())
{
char *msg = xstrprintf (_("`%s' Ada exception"), c->excep_string);
std::string msg = string_printf (_("`%s' Ada exception"),
c->excep_string.c_str ());
uiout->field_string ("what", msg);
xfree (msg);
}
else
uiout->field_string ("what", "all Ada exceptions");
@ -12750,11 +12741,11 @@ print_one_exception (enum ada_exception_catchpoint_kind ex,
break;
case ada_catch_handlers:
if (c->excep_string != NULL)
if (!c->excep_string.empty ())
{
uiout->field_fmt ("what",
_("`%s' Ada exception handlers"),
c->excep_string);
c->excep_string.c_str ());
}
else
uiout->field_string ("what", "all Ada exceptions handlers");
@ -12788,10 +12779,10 @@ print_mention_exception (enum ada_exception_catchpoint_kind ex,
switch (ex)
{
case ada_catch_exception:
if (c->excep_string != NULL)
if (!c->excep_string.empty ())
{
std::string info = string_printf (_("`%s' Ada exception"),
c->excep_string);
c->excep_string.c_str ());
uiout->text (info.c_str ());
}
else
@ -12803,11 +12794,11 @@ print_mention_exception (enum ada_exception_catchpoint_kind ex,
break;
case ada_catch_handlers:
if (c->excep_string != NULL)
if (!c->excep_string.empty ())
{
std::string info
= string_printf (_("`%s' Ada exception handlers"),
c->excep_string);
c->excep_string.c_str ());
uiout->text (info.c_str ());
}
else
@ -12837,8 +12828,8 @@ print_recreate_exception (enum ada_exception_catchpoint_kind ex,
{
case ada_catch_exception:
fprintf_filtered (fp, "catch exception");
if (c->excep_string != NULL)
fprintf_filtered (fp, " %s", c->excep_string);
if (!c->excep_string.empty ())
fprintf_filtered (fp, " %s", c->excep_string.c_str ());
break;
case ada_catch_exception_unhandled:
@ -13047,40 +13038,6 @@ print_recreate_catch_handlers (struct breakpoint *b,
static struct breakpoint_ops catch_handlers_breakpoint_ops;
/* Return a newly allocated copy of the first space-separated token
in ARGSP, and then adjust ARGSP to point immediately after that
token.
Return NULL if ARGPS does not contain any more tokens. */
static char *
ada_get_next_arg (const char **argsp)
{
const char *args = *argsp;
const char *end;
char *result;
args = skip_spaces (args);
if (args[0] == '\0')
return NULL; /* No more arguments. */
/* Find the end of the current argument. */
end = skip_to_space (args);
/* Adjust ARGSP to point to the start of the next argument. */
*argsp = end;
/* Make a copy of the current argument and return it. */
result = (char *) xmalloc (end - args + 1);
strncpy (result, args, end - args);
result[end - args] = '\0';
return result;
}
/* Split the arguments specified in a "catch exception" command.
Set EX to the appropriate catchpoint type.
Set EXCEP_STRING to the name of the specific exception if
@ -13095,24 +13052,20 @@ static void
catch_ada_exception_command_split (const char *args,
bool is_catch_handlers_cmd,
enum ada_exception_catchpoint_kind *ex,
char **excep_string,
std::string &cond_string)
std::string *excep_string,
std::string *cond_string)
{
struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
char *exception_name;
char *cond = NULL;
std::string exception_name;
exception_name = ada_get_next_arg (&args);
if (exception_name != NULL && strcmp (exception_name, "if") == 0)
exception_name = extract_arg (&args);
if (exception_name == "if")
{
/* This is not an exception name; this is the start of a condition
expression for a catchpoint on all exceptions. So, "un-get"
this token, and set exception_name to NULL. */
xfree (exception_name);
exception_name = NULL;
exception_name.clear ();
args -= 2;
}
make_cleanup (xfree, exception_name);
/* Check to see if we have a condition. */
@ -13125,8 +13078,7 @@ catch_ada_exception_command_split (const char *args,
if (args[0] == '\0')
error (_("Condition missing after `if' keyword"));
cond = xstrdup (args);
make_cleanup (xfree, cond);
*cond_string = args;
args += strlen (args);
}
@ -13137,25 +13089,23 @@ catch_ada_exception_command_split (const char *args,
if (args[0] != '\0')
error (_("Junk at end of expression"));
discard_cleanups (old_chain);
if (is_catch_handlers_cmd)
{
/* Catch handling of exceptions. */
*ex = ada_catch_handlers;
*excep_string = exception_name;
}
else if (exception_name == NULL)
else if (exception_name.empty ())
{
/* Catch all exceptions. */
*ex = ada_catch_exception;
*excep_string = NULL;
excep_string->clear ();
}
else if (strcmp (exception_name, "unhandled") == 0)
else if (exception_name == "unhandled")
{
/* Catch unhandled exceptions. */
*ex = ada_catch_exception_unhandled;
*excep_string = NULL;
excep_string->clear ();
}
else
{
@ -13163,8 +13113,6 @@ catch_ada_exception_command_split (const char *args,
*ex = ada_catch_exception;
*excep_string = exception_name;
}
if (cond != NULL)
cond_string.assign (cond);
}
/* Return the name of the symbol on which we should break in order to
@ -13288,15 +13236,12 @@ ada_exception_catchpoint_cond_string (const char *excep_string,
/* Return the symtab_and_line that should be used to insert an exception
catchpoint of the TYPE kind.
EXCEP_STRING should contain the name of a specific exception that
the catchpoint should catch, or NULL otherwise.
ADDR_STRING returns the name of the function where the real
breakpoint that implements the catchpoints is set, depending on the
type of catchpoint we need to create. */
static struct symtab_and_line
ada_exception_sal (enum ada_exception_catchpoint_kind ex, char *excep_string,
ada_exception_sal (enum ada_exception_catchpoint_kind ex,
const char **addr_string, const struct breakpoint_ops **ops)
{
const char *sym_name;
@ -13332,15 +13277,11 @@ ada_exception_sal (enum ada_exception_catchpoint_kind ex, char *excep_string,
EX_KIND is the kind of exception catchpoint to be created.
If EXCEPT_STRING is NULL, this catchpoint is expected to trigger
If EXCEPT_STRING is empty, this catchpoint is expected to trigger
for all exceptions. Otherwise, EXCEPT_STRING indicates the name
of the exception to which this catchpoint applies. When not NULL,
the string must be allocated on the heap, and its deallocation
is no longer the responsibility of the caller.
of the exception to which this catchpoint applies.
COND_STRING, if not NULL, is the catchpoint condition. This string
must be allocated on the heap, and its deallocation is no longer
the responsibility of the caller.
COND_STRING, if not empty, is the catchpoint condition.
TEMPFLAG, if nonzero, means that the underlying breakpoint
should be temporary.
@ -13350,7 +13291,7 @@ ada_exception_sal (enum ada_exception_catchpoint_kind ex, char *excep_string,
void
create_ada_exception_catchpoint (struct gdbarch *gdbarch,
enum ada_exception_catchpoint_kind ex_kind,
char *excep_string,
const std::string &excep_string,
const std::string &cond_string,
int tempflag,
int disabled,
@ -13358,8 +13299,7 @@ create_ada_exception_catchpoint (struct gdbarch *gdbarch,
{
const char *addr_string = NULL;
const struct breakpoint_ops *ops = NULL;
struct symtab_and_line sal
= ada_exception_sal (ex_kind, excep_string, &addr_string, &ops);
struct symtab_and_line sal = ada_exception_sal (ex_kind, &addr_string, &ops);
std::unique_ptr<ada_catchpoint> c (new ada_catchpoint ());
init_ada_exception_breakpoint (c.get (), gdbarch, sal, addr_string,
@ -13381,7 +13321,7 @@ catch_ada_exception_command (const char *arg_entry, int from_tty,
struct gdbarch *gdbarch = get_current_arch ();
int tempflag;
enum ada_exception_catchpoint_kind ex_kind;
char *excep_string = NULL;
std::string excep_string;
std::string cond_string;
tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
@ -13389,7 +13329,7 @@ catch_ada_exception_command (const char *arg_entry, int from_tty,
if (!arg)
arg = "";
catch_ada_exception_command_split (arg, false, &ex_kind, &excep_string,
cond_string);
&cond_string);
create_ada_exception_catchpoint (gdbarch, ex_kind,
excep_string, cond_string,
tempflag, 1 /* enabled */,
@ -13406,7 +13346,7 @@ catch_ada_handlers_command (const char *arg_entry, int from_tty,
struct gdbarch *gdbarch = get_current_arch ();
int tempflag;
enum ada_exception_catchpoint_kind ex_kind;
char *excep_string = NULL;
std::string excep_string;
std::string cond_string;
tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
@ -13414,7 +13354,7 @@ catch_ada_handlers_command (const char *arg_entry, int from_tty,
if (!arg)
arg = "";
catch_ada_exception_command_split (arg, true, &ex_kind, &excep_string,
cond_string);
&cond_string);
create_ada_exception_catchpoint (gdbarch, ex_kind,
excep_string, cond_string,
tempflag, 1 /* enabled */,

2
gdb/ada-lang.h
View File

@ -377,7 +377,7 @@ extern char *ada_main_name (void);
extern void create_ada_exception_catchpoint
(struct gdbarch *gdbarch, enum ada_exception_catchpoint_kind ex_kind,
char *excep_string, const std::string &cond_string, int tempflag,
const std::string &excep_string, const std::string &cond_string, int tempflag,
int disabled, int from_tty);
/* Some information about a given Ada exception. */

18
gdb/mi/mi-cmd-catch.c
View File

@ -79,8 +79,8 @@ mi_cmd_catch_assert (const char *cmd, char *argv[], int argc)
error (_("Invalid argument: %s"), argv[oind]);
scoped_restore restore_breakpoint_reporting = setup_breakpoint_reporting ();
create_ada_exception_catchpoint (gdbarch, ada_catch_assert,
NULL, condition, temp, enabled, 0);
create_ada_exception_catchpoint (gdbarch, ada_catch_assert, std::string (),
condition, temp, enabled, 0);
}
/* Handler for the -catch-exception command. */
@ -91,7 +91,7 @@ mi_cmd_catch_exception (const char *cmd, char *argv[], int argc)
struct gdbarch *gdbarch = get_current_arch();
std::string condition;
int enabled = 1;
char *exception_name = NULL;
std::string exception_name;
int temp = 0;
enum ada_exception_catchpoint_kind ex_kind = ada_catch_exception;
@ -148,14 +148,10 @@ mi_cmd_catch_exception (const char *cmd, char *argv[], int argc)
/* Specifying an exception name does not make sense when requesting
an unhandled exception breakpoint. */
if (ex_kind == ada_catch_exception_unhandled && exception_name != NULL)
if (ex_kind == ada_catch_exception_unhandled && !exception_name.empty ())
error (_("\"-e\" and \"-u\" are mutually exclusive"));
scoped_restore restore_breakpoint_reporting = setup_breakpoint_reporting ();
/* create_ada_exception_catchpoint needs EXCEPTION_NAME to be
xstrdup'ed, and will assume control of its lifetime. */
if (exception_name != NULL)
exception_name = xstrdup (exception_name);
create_ada_exception_catchpoint (gdbarch, ex_kind,
exception_name,
condition, temp, enabled, 0);
@ -169,7 +165,7 @@ mi_cmd_catch_handlers (const char *cmd, char *argv[], int argc)
struct gdbarch *gdbarch = get_current_arch ();
std::string condition;
int enabled = 1;
char *exception_name = NULL;
std::string exception_name;
int temp = 0;
int oind = 0;
@ -220,10 +216,6 @@ mi_cmd_catch_handlers (const char *cmd, char *argv[], int argc)
scoped_restore restore_breakpoint_reporting
= setup_breakpoint_reporting ();
/* create_ada_exception_catchpoint needs EXCEPTION_NAME to be
xstrdup'ed, and will assume control of its lifetime. */
if (exception_name != NULL)
exception_name = xstrdup (exception_name);
create_ada_exception_catchpoint (gdbarch, ada_catch_handlers,
exception_name,
condition, temp, enabled, 0);