| 1 | // RUN: %clang_analyze_cc1 -analyzer-checker=core,unix.Malloc -analyzer-store=region -analyzer-max-loop 4 -verify %s |
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| 2 | #include "Inputs/system-header-simulator.h" |
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| 3 | |
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| 4 | typedef __typeof(sizeof(int)) size_t; |
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| 5 | void *malloc(size_t); |
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| 6 | |
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| 7 | static int another_function(int *y) { |
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| 8 | if (*y > 0) |
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| 9 | return *y; |
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| 10 | return 0; |
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| 11 | } |
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| 12 | |
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| 13 | static void function_which_doesnt_give_up(int **x) { |
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| 14 | *x = 0; |
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| 15 | } |
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| 16 | |
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| 17 | static void function_which_gives_up(int *x) { |
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| 18 | for (int i = 0; i < 5; ++i) |
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| 19 | (*x)++; |
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| 20 | } |
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| 21 | |
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| 22 | static void function_which_gives_up_nested(int *x) { |
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| 23 | function_which_gives_up(x); |
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| 24 | for (int i = 0; i < 5; ++i) |
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| 25 | (*x)++; |
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| 26 | } |
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| 27 | |
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| 28 | static void function_which_doesnt_give_up_nested(int *x, int *y) { |
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| 29 | *y = another_function(x); |
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| 30 | function_which_gives_up(x); |
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| 31 | } |
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| 32 | |
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| 33 | void coverage1(int *x) { |
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| 34 | function_which_gives_up(x); |
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| 35 | char *m = (char*)malloc(12); |
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| 36 | } // expected-warning {{Potential leak of memory pointed to by 'm'}} |
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| 37 | |
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| 38 | void coverage2(int *x) { |
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| 39 | if (x) { |
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| 40 | function_which_gives_up(x); |
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| 41 | char *m = (char*)malloc(12); |
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| 42 | } |
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| 43 | } // expected-warning {{Potential leak of memory pointed to by 'm'}} |
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| 44 | |
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| 45 | void coverage3(int *x) { |
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| 46 | x++; |
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| 47 | function_which_gives_up(x); |
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| 48 | char *m = (char*)malloc(12); |
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| 49 | } // expected-warning {{Potential leak of memory pointed to by 'm'}} |
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| 50 | |
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| 51 | void coverage4(int *x) { |
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| 52 | *x += another_function(x); |
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| 53 | function_which_gives_up(x); |
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| 54 | char *m = (char*)malloc(12); |
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| 55 | } // expected-warning {{Potential leak of memory pointed to by 'm'}} |
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| 56 | |
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| 57 | void coverage5(int *x) { |
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| 58 | for (int i = 0; i<7; ++i) |
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| 59 | function_which_gives_up(x); |
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| 60 | // The root function gives up here. |
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| 61 | char *m = (char*)malloc(12); // no-warning |
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| 62 | } |
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| 63 | |
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| 64 | void coverage6(int *x) { |
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| 65 | for (int i = 0; i<3; ++i) { |
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| 66 | function_which_gives_up(x); |
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| 67 | } |
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| 68 | char *m = (char*)malloc(12); |
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| 69 | } // expected-warning {{Potential leak of memory pointed to by 'm'}} |
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| 70 | |
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| 71 | int coverage7_inline(int *i) { |
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| 72 | function_which_doesnt_give_up(&i); |
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| 73 | return *i; // expected-warning {{Dereference}} |
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| 74 | } |
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| 75 | |
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| 76 | void coverage8(int *x) { |
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| 77 | int y; |
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| 78 | function_which_doesnt_give_up_nested(x, &y); |
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| 79 | y = (*x)/y; // expected-warning {{Division by zero}} |
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| 80 | char *m = (char*)malloc(12); |
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| 81 | } // expected-warning {{Potential leak of memory pointed to by 'm'}} |
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| 82 | |
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| 83 | void function_which_gives_up_settonull(int **x) { |
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| 84 | *x = 0; |
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| 85 | int y = 0; |
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| 86 | for (int i = 0; i < 5; ++i) |
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| 87 | y++; |
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| 88 | } |
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| 89 | |
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| 90 | void coverage9(int *x) { |
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| 91 | int y = 5; |
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| 92 | function_which_gives_up_settonull(&x); |
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| 93 | y = (*x); // no warning |
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| 94 | } |
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| 95 | |
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| 96 | static void empty_function(){ |
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| 97 | } |
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| 98 | int use_empty_function(int x) { |
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| 99 | x = 0; |
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| 100 | empty_function(); |
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| 101 | return 5/x; //expected-warning {{Division by zero}} |
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| 102 | } |
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| 103 | |
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