compiler-rt/test/msan/strndup.cpp

   1 // RUN: %clangxx_msan %s -o %t && not %run %t 2>&1 | FileCheck --check-prefix=ON %s
   2 // RUN: %clangxx_msan %s -o %t && env MSAN_OPTIONS=intercept_strndup=0 %run %t 2>&1 | FileCheck --check-prefix=OFF --allow-empty %s
   3
   4 // When built as C on Linux, strndup is transformed to __strndup.
   5 // RUN: %clangxx_msan -O3 -xc %s -o %t && not %run %t 2>&1 | FileCheck --check-prefix=ON %s
   6
   7 // UNSUPPORTED: target={{.*windows-msvc.*}}
   8
   9 #include <assert.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <sanitizer/msan_interface.h>
  13
  14 int main(int argc, char **argv) {
  15   char kString[4] = "abc";
  16   __msan_poison(kString + 2, 1);
  17   char *copy = strndup(kString, 4); // BOOM
  18   assert(__msan_test_shadow(copy, 4) == 2); // Poisoning is preserved.
  19   free(copy);
  20   return 0;
  21   // ON: Uninitialized bytes in {{(__)?}}strndup at offset 2 inside [{{.*}}, 4)
  22   // ON: MemorySanitizer: use-of-uninitialized-value
  23   // ON: #0 {{.*}}main {{.*}}strndup.cpp:[[@LINE-6]]
  24   // ON-LABEL: SUMMARY
  25   // ON: {{.*}}strndup.cpp:[[@LINE-8]]
  26   // OFF-NOT: MemorySanitizer
  27 }
  28