When calling a non variadic format function(vprintf, vscanf, NSLogv, …), warn if the format string argument is a parameter that is not itself declared as a format string with compatible format.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@151080 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaObjC/format-strings-objc.m b/test/SemaObjC/format-strings-objc.m
index 675729c..a2a926c 100644
--- a/test/SemaObjC/format-strings-objc.m
+++ b/test/SemaObjC/format-strings-objc.m
@@ -9,11 +9,13 @@
// portable to non-Mac platforms.
//===----------------------------------------------------------------------===//
+#include <stdarg.h>
+
typedef signed char BOOL;
typedef unsigned int NSUInteger;
@class NSString, Protocol;
-extern void NSLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2)));
-extern void NSLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2)));
+extern void NSLog(NSString *format, ...);
+extern void NSLogv(NSString *format, va_list args);
typedef struct _NSZone NSZone;
@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
@protocol NSObject - (BOOL)isEqual:(id)object; @end
@@ -151,3 +153,26 @@
void test_toll_free_bridging(CFStringRef x) {
NSLog(@"%@", x); // no-warning
}
+
+@interface Bar
++ (void)log:(NSString *)fmt, ...;
++ (void)log2:(NSString *)fmt, ... __attribute__((format(NSString, 1, 2)));
+@end
+
+@implementation Bar
+
++ (void)log:(NSString *)fmt, ... {
+ va_list ap;
+ va_start(ap,fmt);
+ NSLogv(fmt, ap); // expected-warning{{format string is not a string literal}}
+ va_end(ap);
+}
+
++ (void)log2:(NSString *)fmt, ... {
+ va_list ap;
+ va_start(ap,fmt);
+ NSLogv(fmt, ap); // no-warning
+ va_end(ap);
+}
+
+@end