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authorKees Cook <keescook@chromium.org>2017-08-07 22:29:04 +0200
committerKees Cook <keescook@chromium.org>2017-08-07 22:29:04 +0200
commitad05e6ca7b5fcf15ff178da662035ec7718f938c (patch)
treef4857cd9389a826a2c56a73b798cbe1bb269b81b /scripts/gcc-plugins
parentrandstruct: Enable function pointer struct detection (diff)
parentgcc-plugins: structleak: add option to init all vars used as byref args (diff)
downloadlinux-ad05e6ca7b5fcf15ff178da662035ec7718f938c.tar.xz
linux-ad05e6ca7b5fcf15ff178da662035ec7718f938c.zip
Merge branch 'for-next/gcc-plugin/structleak' into for-next/gcc-plugins
Diffstat (limited to 'scripts/gcc-plugins')
-rw-r--r--scripts/gcc-plugins/structleak_plugin.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/scripts/gcc-plugins/structleak_plugin.c b/scripts/gcc-plugins/structleak_plugin.c
index fa3d7a4b26f2..3f8dd4868178 100644
--- a/scripts/gcc-plugins/structleak_plugin.c
+++ b/scripts/gcc-plugins/structleak_plugin.c
@@ -16,6 +16,7 @@
* Options:
* -fplugin-arg-structleak_plugin-disable
* -fplugin-arg-structleak_plugin-verbose
+ * -fplugin-arg-structleak_plugin-byref-all
*
* Usage:
* $ # for 4.5/4.6/C based 4.7
@@ -42,6 +43,7 @@ static struct plugin_info structleak_plugin_info = {
};
static bool verbose;
+static bool byref_all;
static tree handle_user_attribute(tree *node, tree name, tree args, int flags, bool *no_add_attrs)
{
@@ -150,7 +152,9 @@ static void initialize(tree var)
/* these aren't the 0days you're looking for */
if (verbose)
inform(DECL_SOURCE_LOCATION(var),
- "userspace variable will be forcibly initialized");
+ "%s variable will be forcibly initialized",
+ (byref_all && TREE_ADDRESSABLE(var)) ? "byref"
+ : "userspace");
/* build the initializer expression */
initializer = build_constructor(TREE_TYPE(var), NULL);
@@ -190,7 +194,8 @@ static unsigned int structleak_execute(void)
continue;
/* if the type is of interest, examine the variable */
- if (TYPE_USERSPACE(type))
+ if (TYPE_USERSPACE(type) ||
+ (byref_all && TREE_ADDRESSABLE(var)))
initialize(var);
}
@@ -232,6 +237,10 @@ __visible int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gc
verbose = true;
continue;
}
+ if (!strcmp(argv[i].key, "byref-all")) {
+ byref_all = true;
+ continue;
+ }
error(G_("unknown option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key);
}