1 files changed, 41 insertions, 0 deletions
diff --git a/clang/test/Sema/format-strings.c b/clang/test/Sema/format-strings.c
index f71cd586458..403da07b0f9 100644
--- a/clang/test/Sema/format-strings.c
+++ b/clang/test/Sema/format-strings.c
@@ -21,3 +21,44 @@ void check_string_literal( FILE* fp, const char* s, char *buf, ... ) {
   vsnprintf(buf,2,s,ap); // expected-warning {{mat string is not a string lit}}
 }
 
+void check_writeback_specifier()
+{
+  int x;
+  char *b;
+
+  printf("%n",&x); // expected-warning {{'%n' in format string discouraged}}
+  sprintf(b,"%d%%%n",1, &x); // expected-warning {{'%n' in format string dis}}
+}
+
+void check_invalid_specifier(FILE* fp, char *buf)
+{
+  printf("%s%lb%d","unix",10,20); // expected-warning {{lid conversion '%lb'}}
+  fprintf(fp,"%%%l"); // expected-warning {{lid conversion '%l'}}
+  sprintf(buf,"%%%%%ld%d%d", 1, 2, 3); // no-warning
+  snprintf(buf, 2, "%%%%%ld%;%d", 1, 2, 3); // expected-warning {{sion '%;'}}
+}
+
+void check_null_char_string(char* b)
+{
+  printf("\0this is bogus%d",1); // expected-warning {{string contains '\0'}}
+  snprintf(b,10,"%%%%%d\0%d",1,2); // expected-warning {{string contains '\0'}}
+  printf("%\0d",1); // expected-warning {{string contains '\0'}}
+}
+
+void check_empty_format_string(char* buf)
+{
+  va_list ap;
+  va_start(ap,buf);
+  vprintf("",ap); // expected-warning {{format string is empty}}
+  sprintf(buf,""); // expected-warning {{format string is empty}}
+}
+
+void check_wide_string()
+{
+  char *b;
+  va_list ap;
+  va_start(ap,b);
+
+  printf(L"foo %d",2); // expected-warning {{should not be a wide string}}
+  vasprintf(&b,L"bar %d",2); // expected-warning {{should not be a wide string}}
+}