1 // RUN: %clangxx_asan -g %s -o %t
2 // RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-FWRITE
3 // RUN: not %run %t 1 2>&1 | FileCheck %s --check-prefix=CHECK-FREAD
4 
5 #include <stdio.h>
6 #include <stdlib.h>
7 
8 int test_fread() {
9   FILE *f = fopen("/dev/zero", "r");
10   char buf[2];
11   fread(buf, sizeof(buf), 2, f); // BOOM
12   fclose(f);
13   return 0;
14 }
15 
16 int test_fwrite() {
17   FILE *f = fopen("/dev/null", "w");
18   char buf[2];
19   fwrite(buf, sizeof(buf), 2, f); // BOOM
20   return fclose(f);
21 }
22 
23 int main(int argc, char *argv[]) {
24   if (argc > 1)
25     test_fread();
26   else
27     test_fwrite();
28   return 0;
29 }
30 
31 // CHECK-FREAD: {{.*ERROR: AddressSanitizer: stack-buffer-overflow}}
32 // CHECK-FREAD: #{{.*}} in {{(wrap_|__interceptor_)?}}fread
33 // CHECK-FWRITE: {{.*ERROR: AddressSanitizer: stack-buffer-overflow}}
34 // CHECK-FWRITE: #{{.*}} in {{(wrap_|__interceptor_)?}}fwrite
35