1 // RUN: %clangxx_msan %s -o %t && not %run %t 2>&1 | FileCheck --check-prefix=ON %s 2 // RUN: %clangxx_msan %s -o %t && 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: 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 __interceptor_{{(__)?}}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 29