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Avoid memory leaks on struct cmd_list_element.doc field. 

* cli/cli-decode.c (add_alias_cmd): Make a copy of doc field
	if flags contains DOC_ALLOCATED.
	(add_setshow_cmd_full): Add DOC_ALLOCATED to set and show
	flags.
	(delete_cmd): Handle DOC_ALLOCATED flag.
	* cli/cli-decode.h (DOC_ALLOCATED): New macro for use
	in flags filed of struct cmd_list_element.
	(struct cmd_list_element): Document new flag item.
This commit is contained in:
Pierre Muller 2012-12-05 23:23:22 +00:00
parent ad288036a7
commit 5bc81a00b6
3 changed files with 28 additions and 1 deletions
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12
gdb/ChangeLog
View File

@ -1,3 +1,15 @@
2012-12-05 Pierre Muller <muller@sourceware.org>
Avoid memory leaks on struct cmd_list_element.doc field.
* cli/cli-decode.c (add_alias_cmd): Make a copy of doc field
if flags contains DOC_ALLOCATED.
(add_setshow_cmd_full): Add DOC_ALLOCATED to set and show
flags.
(delete_cmd): Handle DOC_ALLOCATED flag.
* cli/cli-decode.h (DOC_ALLOCATED): New macro for use
in flags filed of struct cmd_list_element.
(struct cmd_list_element): Document new flag item.
2012-12-04 Doug Evans <dje@google.com>
* symmisc.c: Whitespace fixes.

12
gdb/cli/cli-decode.c
View File

@ -306,6 +306,13 @@ add_alias_cmd (char *name, char *oldname, enum command_class class,
}
c = add_cmd (name, class, NULL, old->doc, list);
/* If OLD->DOC can be freed, we should make another copy. */
if ((old->flags & DOC_ALLOCATED) != 0)
{
c->doc = xstrdup (old->doc);
c->flags |= DOC_ALLOCATED;
}
/* NOTE: Both FUNC and all the FUNCTIONs need to be copied. */
c->func = old->func;
c->function = old->function;
@ -451,6 +458,8 @@ add_setshow_cmd_full (char *name,
}
set = add_set_or_show_cmd (name, set_cmd, class, var_type, var,
full_set_doc, set_list);
set->flags |= DOC_ALLOCATED;
if (set_func != NULL)
set_cmd_sfunc (set, set_func);
@ -458,6 +467,7 @@ add_setshow_cmd_full (char *name,
show = add_set_or_show_cmd (name, show_cmd, class, var_type, var,
full_show_doc, show_list);
show->flags |= DOC_ALLOCATED;
show->show_value_func = show_func;
if (set_result != NULL)
@ -769,6 +779,8 @@ delete_cmd (char *name, struct cmd_list_element **list,
*prehookee = iter->hookee_pre;
if (iter->hookee_post)
iter->hookee_post->hook_post = 0;
if (iter->doc && (iter->flags & DOC_ALLOCATED) != 0)
xfree (iter->doc);
*posthook = iter->hook_post;
*posthookee = iter->hookee_post;

5
gdb/cli/cli-decode.h
View File

@ -51,6 +51,7 @@ cmd_types;
#define CMD_DEPRECATED 0x1
#define DEPRECATED_WARN_USER 0x2
#define MALLOCED_REPLACEMENT 0x4
#define DOC_ALLOCATED 0x8
struct cmd_list_element
{
@ -112,7 +113,9 @@ struct cmd_list_element
memory for replacement is malloc'ed. When a command is
undeprecated or re-deprecated at runtime we don't want to risk
calling free on statically allocated memory, so we check this
flag. */
flag.
bit 3: DOC_ALLOCATED, set if the doc field should be xfree'd. */
int flags;