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1 // Test strict_string_checks option in strcspn function
2 // RUN: %clang_asan %s -o %t && %run %t 2>&1
3 // RUN: %env_asan_opts=strict_string_checks=false %run %t 2>&1
4 // RUN: %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
5 
6 #include <assert.h>
7 #include <stdlib.h>
8 #include <string.h>
9 
main(int argc,char ** argv)10 int main(int argc, char **argv) {
11   size_t size = 100;
12   char fill = 'o';
13   char *s1 = (char*)malloc(size);
14   char *s2 = (char*)malloc(size);
15   memset(s1, fill, size);
16   s1[0] = 'z';
17   memset(s2, fill, size);
18   s2[size-1] = '\0';
19   size_t r = strcspn(s1, s2);
20   // CHECK: {{.*ERROR: AddressSanitizer: heap-buffer-overflow on address}}
21   // CHECK: READ of size 101
22   assert(r == 1);
23   free(s1);
24   free(s2);
25   return 0;
26 }
27