| 1 | // RUN: %clang_analyze_cc1 -analyzer-store=region -verify %s \ |
| 2 | // RUN: -analyzer-checker=core \ |
| 3 | // RUN: -analyzer-checker=unix \ |
| 4 | // RUN: -analyzer-checker=core.uninitialized \ |
| 5 | // RUN: -analyzer-config unix.DynamicMemoryModeling:Optimistic=true |
| 6 | |
| 7 | typedef __typeof(sizeof(int)) size_t; |
| 8 | void *malloc(size_t); |
| 9 | void free(void *); |
| 10 | |
| 11 | char stackBased1 () { |
| 12 | char buf[2]; |
| 13 | buf[0] = 'a'; |
| 14 | return buf[1]; // expected-warning{{Undefined}} |
| 15 | } |
| 16 | |
| 17 | char stackBased2 () { |
| 18 | char buf[2]; |
| 19 | buf[1] = 'a'; |
| 20 | return buf[0]; // expected-warning{{Undefined}} |
| 21 | } |
| 22 | |
| 23 | // Exercise the conditional visitor. Radar://10105448 |
| 24 | char stackBased3 (int *x) { |
| 25 | char buf[2]; |
| 26 | int *y; |
| 27 | buf[0] = 'a'; |
| 28 | if (!(y = x)) { |
| 29 | return buf[1]; // expected-warning{{Undefined}} |
| 30 | } |
| 31 | return buf[0]; |
| 32 | } |
| 33 | |
| 34 | char heapBased1 () { |
| 35 | char *buf = malloc(2); |
| 36 | buf[0] = 'a'; |
| 37 | char result = buf[1]; // expected-warning{{undefined}} |
| 38 | free(buf); |
| 39 | return result; |
| 40 | } |
| 41 | |
| 42 | char heapBased2 () { |
| 43 | char *buf = malloc(2); |
| 44 | buf[1] = 'a'; |
| 45 | char result = buf[0]; // expected-warning{{undefined}} |
| 46 | free(buf); |
| 47 | return result; |
| 48 | } |
| 49 | |