| 1 | // RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -verify %s |
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| 2 | |
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| 3 | void clang_analyzer_eval(int); |
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| 4 | void clang_analyzer_checkInlined(int); |
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| 5 | |
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| 6 | int test1_f1() { |
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| 7 | int y = 1; |
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| 8 | y++; |
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| 9 | clang_analyzer_checkInlined(1); // expected-warning{{TRUE}} |
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| 10 | return y; |
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| 11 | } |
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| 12 | |
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| 13 | void test1_f2() { |
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| 14 | int x = 1; |
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| 15 | x = test1_f1(); |
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| 16 | if (x == 1) { |
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| 17 | int *p = 0; |
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| 18 | *p = 3; // no-warning |
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| 19 | } |
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| 20 | if (x == 2) { |
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| 21 | int *p = 0; |
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| 22 | *p = 3; // expected-warning{{Dereference of null pointer (loaded from variable 'p')}} |
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| 23 | } |
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| 24 | } |
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| 25 | |
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| 26 | // Test that inlining works when the declared function has less arguments |
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| 27 | // than the actual number in the declaration. |
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| 28 | void test2_f1() {} |
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| 29 | int test2_f2(); |
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| 30 | |
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| 31 | void test2_f3() { |
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| 32 | test2_f1(test2_f2()); // expected-warning{{too many arguments in call to 'test2_f1'}} |
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| 33 | } |
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| 34 | |
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| 35 | // Test that inlining works with recursive functions. |
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| 36 | |
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| 37 | unsigned factorial(unsigned x) { |
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| 38 | if (x <= 1) |
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| 39 | return 1; |
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| 40 | return x * factorial(x - 1); |
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| 41 | } |
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| 42 | |
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| 43 | void test_factorial() { |
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| 44 | if (factorial(3) == 6) { |
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| 45 | int *p = 0; |
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| 46 | *p = 0xDEADBEEF; // expected-warning {{null}} |
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| 47 | } |
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| 48 | else { |
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| 49 | int *p = 0; |
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| 50 | *p = 0xDEADBEEF; // no-warning |
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| 51 | } |
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| 52 | } |
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| 53 | |
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| 54 | void test_factorial_2() { |
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| 55 | unsigned x = factorial(3); |
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| 56 | if (x == factorial(3)) { |
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| 57 | int *p = 0; |
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| 58 | *p = 0xDEADBEEF; // expected-warning {{null}} |
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| 59 | } |
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| 60 | else { |
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| 61 | int *p = 0; |
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| 62 | *p = 0xDEADBEEF; // no-warning |
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| 63 | } |
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| 64 | } |
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| 65 | |
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| 66 | // Test that returning stack memory from a parent stack frame does |
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| 67 | // not trigger a warning. |
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| 68 | static char *return_buf(char *buf) { |
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| 69 | return buf + 10; |
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| 70 | } |
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| 71 | |
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| 72 | void test_return_stack_memory_ok() { |
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| 73 | char stack_buf[100]; |
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| 74 | char *pos = return_buf(stack_buf); |
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| 75 | (void) pos; |
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| 76 | } |
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| 77 | |
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| 78 | char *test_return_stack_memory_bad() { |
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| 79 | char stack_buf[100]; |
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| 80 | char *x = stack_buf; |
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| 81 | return x; // expected-warning {{stack memory associated}} |
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| 82 | } |
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| 83 | |
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| 84 | // Test that passing a struct value with an uninitialized field does |
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| 85 | // not trigger a warning if we are inlining and the body is available. |
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| 86 | struct rdar10977037 { int x, y; }; |
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| 87 | int test_rdar10977037_aux(struct rdar10977037 v) { return v.y; } |
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| 88 | int test_rdar10977037_aux_2(struct rdar10977037 v); |
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| 89 | int test_rdar10977037() { |
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| 90 | struct rdar10977037 v; |
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| 91 | v.y = 1; |
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| 92 | v. y += test_rdar10977037_aux(v); // no-warning |
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| 93 | return test_rdar10977037_aux_2(v); // expected-warning {{Passed-by-value struct argument contains uninitialized data}} |
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| 94 | } |
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| 95 | |
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| 96 | |
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| 97 | // Test inlining a forward-declared function. |
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| 98 | // This regressed when CallEvent was first introduced. |
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| 99 | int plus1(int x); |
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| 100 | void test() { |
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| 101 | clang_analyzer_eval(plus1(2) == 3); // expected-warning{{TRUE}} |
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| 102 | } |
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| 103 | |
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| 104 | int plus1(int x) { |
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| 105 | return x + 1; |
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| 106 | } |
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| 107 | |
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| 108 | |
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| 109 | void never_called_by_anyone() { |
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| 110 | clang_analyzer_checkInlined(0); // no-warning |
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| 111 | } |
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| 112 | |
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| 113 | |
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| 114 | void knr_one_argument(a) int a; { } |
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| 115 | |
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| 116 | void call_with_less_arguments() { |
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| 117 | knr_one_argument(); // expected-warning{{too few arguments}} expected-warning{{Function taking 1 argument is called with fewer (0)}} |
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| 118 | } |
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| 119 | |
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