1 // RUN: %clang_analyze_cc1 -triple x86_64-pc-linux-gnu -analyzer-checker=core -verify %s
2 
3 typedef unsigned long size_t;
4 #define BIGINDEX 65536U
5 
check_VLA_overflow_sizeof(unsigned int x)6 size_t check_VLA_overflow_sizeof(unsigned int x) {
7   if (x == BIGINDEX) {
8     // We expect here that size_t is a 64 bit value.
9     // Size of this array should be the first to overflow.
10     size_t s = sizeof(char[x][x][x][x]); // expected-warning{{Declared variable-length array (VLA) has too large size [core.VLASize]}}
11     return s;
12   }
13   return 0;
14 }
15 
check_VLA_overflow_typedef()16 void check_VLA_overflow_typedef() {
17   unsigned int x = BIGINDEX;
18   typedef char VLA[x][x][x][x]; // expected-warning{{Declared variable-length array (VLA) has too large size [core.VLASize]}}
19 }
20 
check_VLA_no_overflow()21 void check_VLA_no_overflow() {
22   unsigned int x = BIGINDEX;
23   typedef char VLA[x][x][x][x - 1];
24   typedef char VLA1[0xffffffffu];
25 }
26