clang/test/Analysis/std-c-library-functions-arg-cstring-dependency.c

   1 // This test case crashes if strncasecmp is modeled in StdCLibraryFunctions.
   2 // Either we fix CStringChecker to handle the call prerequisites in
   3 // checkPreCall, or we must not evaluate any pure functions in
   4 // StdCLibraryFunctions that are also handled in CStringChecker.
   5
   6 // RUN: %clang_analyze_cc1 %s \
   7 // RUN:   -analyzer-checker=core \
   8 // RUN:   -analyzer-checker=unix.StdCLibraryFunctions \
   9 // RUN:   -analyzer-checker=unix.cstring.NullArg \
  10 // RUN:   -analyzer-config unix.StdCLibraryFunctions:ModelPOSIX=true \
  11 // RUN:   -triple x86_64-unknown-linux-gnu \
  12 // RUN:   -verify
  13
  14 typedef __typeof(sizeof(int)) size_t;
  15 int strncasecmp(const char *s1, const char *s2, size_t n);
  16
  17 int strncasecmp_null_argument(char *a, size_t n) {
  18   char *b = 0;
  19   return strncasecmp(a, b, n); // expected-warning{{Null pointer passed as 2nd argument to string comparison function}}
  20 }