Jordy Rose | 19c5dd1 | 2010-07-27 01:37:31 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -analyze -Wwrite-strings -analyzer-experimental-internal-checks -analyzer-check-objc-mem -analyzer-store=region -analyzer-experimental-checks -verify %s |
| 2 | // RUN: %clang_cc1 -analyze -DUSE_BUILTINS -Wwrite-strings -analyzer-experimental-internal-checks -analyzer-check-objc-mem -analyzer-store=region -analyzer-experimental-checks -verify %s |
| 3 | // RUN: %clang_cc1 -analyze -DVARIANT -Wwrite-strings -analyzer-experimental-internal-checks -analyzer-check-objc-mem -analyzer-store=region -analyzer-experimental-checks -verify %s |
| 4 | // RUN: %clang_cc1 -analyze -DUSE_BUILTINS -DVARIANT -Wwrite-strings -analyzer-experimental-internal-checks -analyzer-check-objc-mem -analyzer-store=region -analyzer-experimental-checks -verify %s |
| 5 | |
| 6 | //===----------------------------------------------------------------------=== |
| 7 | // Declarations |
| 8 | //===----------------------------------------------------------------------=== |
| 9 | |
| 10 | // Some functions are so similar to each other that they follow the same code |
| 11 | // path, such as memcpy and __memcpy_chk, or memcmp and bcmp. If VARIANT is |
| 12 | // defined, make sure to use the variants instead to make sure they are still |
| 13 | // checked by the analyzer. |
| 14 | |
| 15 | // Some functions are implemented as builtins. These should be #defined as |
| 16 | // BUILTIN(f), which will prepend "__builtin_" if USE_BUILTINS is defined. |
| 17 | |
| 18 | // Functions that have variants and are also availabe as builtins should be |
| 19 | // declared carefully! See memcpy() for an example. |
| 20 | |
| 21 | #ifdef USE_BUILTINS |
| 22 | # define BUILTIN(f) __builtin_ ## f |
| 23 | #else /* USE_BUILTINS */ |
| 24 | # define BUILTIN(f) f |
| 25 | #endif /* USE_BUILTINS */ |
| 26 | |
| 27 | typedef typeof(sizeof(int)) size_t; |
| 28 | |
| 29 | //===----------------------------------------------------------------------=== |
| 30 | // strlen() |
| 31 | //===----------------------------------------------------------------------=== |
| 32 | |
| 33 | #define strlen BUILTIN(strlen) |
| 34 | size_t strlen(const char *s); |
| 35 | |
| 36 | void strlen_constant0() { |
| 37 | if (strlen("123") != 3) |
| 38 | (void)*(char*)0; // expected-warning{{never executed}} |
| 39 | } |
| 40 | |
| 41 | void strlen_constant1() { |
| 42 | const char *a = "123"; |
| 43 | if (strlen(a) != 3) |
| 44 | (void)*(char*)0; // expected-warning{{never executed}} |
| 45 | } |
| 46 | |
| 47 | void strlen_constant2(char x) { |
| 48 | char a[] = "123"; |
| 49 | a[0] = x; |
| 50 | if (strlen(a) != 3) |
| 51 | (void)*(char*)0; // expected-warning{{null}} |
| 52 | } |
| 53 | |
| 54 | size_t strlen_null() { |
| 55 | return strlen(0); // expected-warning{{Null pointer argument in call to byte string function}} |
| 56 | } |
| 57 | |
| 58 | size_t strlen_fn() { |
| 59 | return strlen((char*)&strlen_fn); // expected-warning{{Argument to byte string function is the address of the function 'strlen_fn', which is not a null-terminated string}} |
| 60 | } |
| 61 | |
| 62 | size_t strlen_nonloc() { |
| 63 | label: |
| 64 | return strlen((char*)&&label); // expected-warning{{Argument to byte string function is the address of the label 'label', which is not a null-terminated string}} |
| 65 | } |