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(void)16 void check_VLA_overflow_typedef(void) {
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(void)21 void check_VLA_no_overflow(void) {
22 unsigned int x = BIGINDEX;
23 typedef char VLA[x][x][x][x - 1];
24 typedef char VLA1[0xffffffffu];
25 }
26