26 lines · c
1// RUN: %clang_analyze_cc1 -triple x86_64-pc-linux-gnu -analyzer-checker=core -verify %s2 3typedef unsigned long size_t;4#define BIGINDEX 65536U5 6size_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 16void 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 21void 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