Merge tag 'v5.1-rc2' into next-general

Merge to Linux 5.1-rc2 for subsystems to work with.

1 files changed, 25 insertions, 11 deletions

diff --git a/scripts/gcc-plugins/structleak_plugin.c b/scripts/gcc-plugins/structleak_plugin.c
index 10292f791e99..e89be8f5c859 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
  * -fplugin-arg-structleak_plugin-byref-all
  *
  * Usage:
@@ -26,7 +27,6 @@
  * $ gcc -fplugin=./structleak_plugin.so test.c -O2
  *
  * TODO: eliminate redundant initializers
- *       increase type coverage
  */
 
 #include "gcc-common.h"
@@ -37,13 +37,18 @@
 __visible int plugin_is_GPL_compatible;
 
 static struct plugin_info structleak_plugin_info = {
-	.version	= "201607271510vanilla",
+	.version	= "20190125vanilla",
 	.help		= "disable\tdo not activate plugin\n"
-			   "verbose\tprint all initialized variables\n",
+			  "byref\tinit structs passed by reference\n"
+			  "byref-all\tinit anything passed by reference\n"
+			  "verbose\tprint all initialized variables\n",
 };
 
+#define BYREF_STRUCT	1
+#define BYREF_ALL	2
+
 static bool verbose;
-static bool byref_all;
+static int byref;
 
 static tree handle_user_attribute(tree *node, tree name, tree args, int flags, bool *no_add_attrs)
 {
@@ -118,6 +123,7 @@ static void initialize(tree var)
 	gimple_stmt_iterator gsi;
 	tree initializer;
 	gimple init_stmt;
+	tree type;
 
 	/* this is the original entry bb before the forced split */
 	bb = single_succ(ENTRY_BLOCK_PTR_FOR_FN(cfun));
@@ -148,11 +154,15 @@ static void initialize(tree var)
 	if (verbose)
 		inform(DECL_SOURCE_LOCATION(var),
 			"%s variable will be forcibly initialized",
-			(byref_all && TREE_ADDRESSABLE(var)) ? "byref"
-							     : "userspace");
+			(byref && TREE_ADDRESSABLE(var)) ? "byref"
+							 : "userspace");
 
 	/* build the initializer expression */
-	initializer = build_constructor(TREE_TYPE(var), NULL);
+	type = TREE_TYPE(var);
+	if (AGGREGATE_TYPE_P(type))
+		initializer = build_constructor(type, NULL);
+	else
+		initializer = fold_convert(type, integer_zero_node);
 
 	/* build the initializer stmt */
 	init_stmt = gimple_build_assign(var, initializer);
@@ -184,13 +194,13 @@ static unsigned int structleak_execute(void)
 		if (!auto_var_in_fn_p(var, current_function_decl))
 			continue;
 
-		/* only care about structure types */
-		if (TREE_CODE(type) != RECORD_TYPE && TREE_CODE(type) != UNION_TYPE)
+		/* only care about structure types unless byref-all */
+		if (byref != BYREF_ALL && TREE_CODE(type) != RECORD_TYPE && TREE_CODE(type) != UNION_TYPE)
 			continue;
 
 		/* if the type is of interest, examine the variable */
 		if (TYPE_USERSPACE(type) ||
-		    (byref_all && TREE_ADDRESSABLE(var)))
+		    (byref && TREE_ADDRESSABLE(var)))
 			initialize(var);
 	}
 
@@ -232,8 +242,12 @@ __visible int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gc
 			verbose = true;
 			continue;
 		}
+		if (!strcmp(argv[i].key, "byref")) {
+			byref = BYREF_STRUCT;
+			continue;
+		}
 		if (!strcmp(argv[i].key, "byref-all")) {
-			byref_all = true;
+			byref = BYREF_ALL;
 			continue;
 		}
 		error(G_("unknown option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key);