kconfig: add xstrdup() helper

We already have xmalloc(), xcalloc(), and xrealloc(().  Add xstrdup()
as well to save tedious error handling.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

6 files changed, 17 insertions, 5 deletions

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 5c12dc91ef34..df26c7b0fe13 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -178,7 +178,7 @@ static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
         case S_HEX:
         done:
                 if (sym_string_valid(sym, p)) {
-                        sym->def[def].val = strdup(p);
+                        sym->def[def].val = xstrdup(p);
                         sym->flags |= def_flags;
                 } else {
                         if (def != S_DEF_AUTO)
diff --git a/scripts/kconfig/kxgettext.c b/scripts/kconfig/kxgettext.c
index 2858738b22d5..240880a89111 100644
--- a/scripts/kconfig/kxgettext.c
+++ b/scripts/kconfig/kxgettext.c
@@ -101,7 +101,7 @@ static struct message *message__new(const char *msg, char *option,
         if (self->files == NULL)
                 goto out_fail;
 
-        self->msg = strdup(msg);
+        self->msg = xstrdup(msg);
         if (self->msg == NULL)
                 goto out_fail_msg;
 
diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index 4e23febbe4b2..2d5ec2d0e952 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -115,6 +115,7 @@ int file_write_dep(const char *name);
 void *xmalloc(size_t size);
 void *xcalloc(size_t nmemb, size_t size);
 void *xrealloc(void *p, size_t size);
+char *xstrdup(const char *s);
 
 struct gstr {
         size_t len;
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index cca9663be5dd..2220bc4b051b 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -183,7 +183,7 @@ static void sym_validate_range(struct symbol *sym)
                 sprintf(str, "%lld", val2);
         else
                 sprintf(str, "0x%llx", val2);
-        sym->curr.val = strdup(str);
+        sym->curr.val = xstrdup(str);
 }
 
 static void sym_set_changed(struct symbol *sym)
@@ -849,7 +849,7 @@ struct symbol *sym_lookup(const char *name, int flags)
                                    : !(symbol->flags & (SYMBOL_CONST|SYMBOL_CHOICE))))
                                 return symbol;
                 }
-                new_name = strdup(name);
+                new_name = xstrdup(name);
         } else {
                 new_name = NULL;
                 hash = 0;
diff --git a/scripts/kconfig/util.c b/scripts/kconfig/util.c
index b98a79e30e04..c6f6e21b809f 100644
--- a/scripts/kconfig/util.c
+++ b/scripts/kconfig/util.c
@@ -154,3 +154,14 @@ void *xrealloc(void *p, size_t size)
         fprintf(stderr, "Out of memory.\n");
         exit(1);
 }
+
+char *xstrdup(const char *s)
+{
+        char *p;
+
+        p = strdup(s);
+        if (p)
+                return p;
+        fprintf(stderr, "Out of memory.\n");
+        exit(1);
+}
diff --git a/scripts/kconfig/zconf.y b/scripts/kconfig/zconf.y
index 4be98050b961..f5cb55f03ce5 100644
--- a/scripts/kconfig/zconf.y
+++ b/scripts/kconfig/zconf.y
@@ -127,7 +127,7 @@ no_mainmenu_stmt: /* empty */
          * later regardless of whether it comes from the 'prompt' in
          * mainmenu_stmt or here
          */
-        menu_add_prompt(P_MENU, strdup("Linux Kernel Configuration"), NULL);
+        menu_add_prompt(P_MENU, xstrdup("Linux Kernel Configuration"), NULL);
 };