| 1 | // RUN: %clang_analyze_cc1 -analyzer-checker=core,alpha.core,unix,alpha.unix -std=gnu99 -analyzer-store=region -verify %s |
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| 2 | |
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| 3 | #include "Inputs/system-header-simulator.h" |
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| 4 | |
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| 5 | typedef __typeof(sizeof(int)) size_t; |
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| 6 | void *memset(void *__s, int __c, size_t __n); |
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| 7 | void *malloc(size_t __size); |
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| 8 | void free(void *__ptr); |
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| 9 | |
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| 10 | // The store for 'a[1]' should not be removed mistakenly. SymbolicRegions may |
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| 11 | // also be live roots. |
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| 12 | void f14(int *a) { |
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| 13 | int i; |
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| 14 | a[1] = 1; |
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| 15 | i = a[1]; |
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| 16 | if (i != 1) { |
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| 17 | int *p = 0; |
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| 18 | i = *p; // no-warning |
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| 19 | } |
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| 20 | } |
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| 21 | |
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| 22 | void foo() { |
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| 23 | int *x = malloc(sizeof(int)); |
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| 24 | memset(x, 0, sizeof(int)); |
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| 25 | int n = 1 / *x; // expected-warning {{Division by zero}} |
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| 26 | free(x); |
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| 27 | } |
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| 28 | |
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| 29 | void bar() { |
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| 30 | int *x = malloc(sizeof(int)); |
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| 31 | memset(x, 0, 1); |
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| 32 | int n = 1 / *x; // no-warning |
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| 33 | free(x); |
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| 34 | } |
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| 35 | |
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| 36 | void testConcreteNull() { |
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| 37 | int *x = 0; |
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| 38 | memset(x, 0, 1); // expected-warning {{Null pointer argument in call to memory set function}} |
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| 39 | } |
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| 40 | |
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| 41 | void testStackArray() { |
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| 42 | char buf[13]; |
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| 43 | memset(buf, 0, 1); // no-warning |
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| 44 | } |
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| 45 | |
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| 46 | void testHeapSymbol() { |
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| 47 | char *buf = (char *)malloc(13); |
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| 48 | memset(buf, 0, 1); // no-warning |
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| 49 | free(buf); |
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| 50 | } |
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| 51 | |
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| 52 | void testStackArrayOutOfBound() { |
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| 53 | char buf[1]; |
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| 54 | memset(buf, 0, 1024); // expected-warning {{Memory set function accesses out-of-bound array element}} expected-warning {{'memset' will always overflow; destination buffer has size 1, but size argument is 1024}} |
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| 55 | } |
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| 56 | |
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| 57 | void testHeapSymbolOutOfBound() { |
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| 58 | char *buf = (char *)malloc(1); |
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| 59 | memset(buf, 0, 1024); // expected-warning {{Memory set function accesses out-of-bound array element}} |
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| 60 | free(buf); |
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| 61 | } |
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| 62 | |
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| 63 | void testStackArraySameSize() { |
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| 64 | char buf[1]; |
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| 65 | memset(buf, 0, sizeof(buf)); // no-warning |
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| 66 | } |
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| 67 | |
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| 68 | void testHeapSymbolSameSize() { |
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| 69 | char *buf = (char *)malloc(1); |
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| 70 | memset(buf, 0, 1); // no-warning |
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| 71 | free(buf); |
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| 72 | } |
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| 73 | |
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