Argyrios Kyrtzidis | c4d2c90 | 2011-02-28 19:49:42 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-store region -verify %s |
Zhongxing Xu | 1622a54 | 2010-06-08 10:00:00 +0000 | [diff] [blame] | 2 | |
| 3 | char const *p; |
| 4 | |
| 5 | void f0() { |
| 6 | char const str[] = "This will change"; |
Ted Kremenek | a816615 | 2010-06-17 04:21:37 +0000 | [diff] [blame] | 7 | p = str; // expected-warning{{Address of stack memory associated with local variable 'str' is still referred to by the global variable 'p' upon returning to the caller. This will be a dangling reference}} |
Zhongxing Xu | 1622a54 | 2010-06-08 10:00:00 +0000 | [diff] [blame] | 8 | } |
| 9 | |
| 10 | void f1() { |
| 11 | char const str[] = "This will change"; |
| 12 | p = str; |
| 13 | p = 0; // no-warning |
| 14 | } |
Zhongxing Xu | 2c46458 | 2010-06-09 05:50:38 +0000 | [diff] [blame] | 15 | |
| 16 | void f2() { |
Ted Kremenek | a816615 | 2010-06-17 04:21:37 +0000 | [diff] [blame] | 17 | p = (const char *) __builtin_alloca(12); // expected-warning{{Address of stack memory allocated by call to alloca() on line 17 is still referred to by the global variable 'p' upon returning to the caller. This will be a dangling reference}} |
Zhongxing Xu | 2c46458 | 2010-06-09 05:50:38 +0000 | [diff] [blame] | 18 | } |
Ted Kremenek | 551bd1f | 2010-06-17 00:24:44 +0000 | [diff] [blame] | 19 | |
| 20 | // PR 7383 - previosly the stack address checker would crash on this example |
| 21 | // because it would attempt to do a direct load from 'pr7383_list'. |
| 22 | static int pr7383(__const char *__) |
| 23 | { |
| 24 | return 0; |
| 25 | } |
| 26 | extern __const char *__const pr7383_list[]; |
Ted Kremenek | a816615 | 2010-06-17 04:21:37 +0000 | [diff] [blame] | 27 | |
| 28 | // Test that we catch multiple returns via globals when analyzing a function. |
| 29 | void test_multi_return() { |
| 30 | static int *a, *b; |
| 31 | int x; |
| 32 | a = &x; |
| 33 | b = &x; // expected-warning{{Address of stack memory associated with local variable 'x' is still referred to by the global variable 'a' upon returning}} expected-warning{{Address of stack memory associated with local variable 'x' is still referred to by the global variable 'b' upon returning}} |
| 34 | } |