| 1 | // RUN: %clang_analyze_cc1 %s -analyzer-checker=core.NullDereference,core.DivideZero -fblocks -analyzer-output=text -analyzer-config suppress-null-return-paths=false -verify -analyzer-config eagerly-assume=false %s |
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| 2 | // RUN: %clang_analyze_cc1 -analyzer-config eagerly-assume=false %s -analyzer-checker=core.NullDereference,core.DivideZero -fblocks -analyzer-output=plist -analyzer-config suppress-null-return-paths=false -o %t |
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| 3 | // RUN: cat %t | %diff_plist %S/Inputs/expected-plists/inline-plist.c.plist - |
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| 4 | |
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| 5 | // <rdar://problem/10967815> |
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| 6 | void mmm(int y) { |
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| 7 | if (y != 0) |
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| 8 | y++; |
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| 9 | } |
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| 10 | |
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| 11 | int foo(int x, int y) { |
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| 12 | mmm(y); |
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| 13 | if (x != 0) { |
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| 14 | // expected-note@-1 {{Assuming 'x' is equal to 0}} |
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| 15 | // expected-note@-2 {{Taking false branch}} |
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| 16 | x++; |
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| 17 | } |
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| 18 | return 5/x; // expected-warning{{Division by zero}} expected-note{{Division by zero}} |
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| 19 | } |
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| 20 | |
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| 21 | // Test a bug triggering only when inlined. |
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| 22 | void has_bug(int *p) { |
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| 23 | *p = 0xDEADBEEF; // expected-warning{{Dereference of null pointer (loaded from variable 'p')}} expected-note{{Dereference of null pointer (loaded from variable 'p')}} |
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| 24 | } |
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| 25 | |
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| 26 | void test_has_bug() { |
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| 27 | has_bug(0); |
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| 28 | // expected-note@-1 {{Passing null pointer value via 1st parameter 'p'}} |
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| 29 | // expected-note@-2 {{Calling 'has_bug'}} |
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| 30 | } |
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| 31 | |
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| 32 | void triggers_bug(int *p) { |
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| 33 | *p = 0xDEADBEEF; // expected-warning{{Dereference of null pointer (loaded from variable 'p')}} expected-note{{Dereference of null pointer (loaded from variable 'p')}} |
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| 34 | } |
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| 35 | |
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| 36 | // This function triggers a bug by calling triggers_bug(). The diagnostics |
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| 37 | // should show when p is assumed to be null. |
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| 38 | void bar(int *p) { |
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| 39 | if (!!p) { |
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| 40 | // expected-note@-1 {{Assuming 'p' is null}} |
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| 41 | // expected-note@-2 {{Taking false branch}} |
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| 42 | return; |
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| 43 | } |
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| 44 | |
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| 45 | if (p == 0) { |
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| 46 | // expected-note@-1 {{Taking true branch}} |
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| 47 | triggers_bug(p); |
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| 48 | // expected-note@-1 {{Passing null pointer value via 1st parameter 'p'}} |
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| 49 | // expected-note@-2 {{Calling 'triggers_bug'}} |
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| 50 | } |
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| 51 | } |
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| 52 | |
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| 53 | // ========================================================================== // |
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| 54 | // Test inlining of blocks. |
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| 55 | // ========================================================================== // |
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| 56 | |
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| 57 | void test_block__capture_null() { |
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| 58 | int *p = 0; // expected-note{{'p' initialized to a null pointer value}} |
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| 59 | ^(){ // expected-note {{Calling anonymous block}} |
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| 60 | *p = 1; // expected-warning{{Dereference of null pointer (loaded from variable 'p')}} expected-note{{Dereference of null pointer (loaded from variable 'p')}} |
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| 61 | }(); |
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| 62 | |
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| 63 | } |
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| 64 | |
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| 65 | void test_block_ret() { |
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| 66 | int *p = ^int*(){ // expected-note {{Calling anonymous block}} expected-note{{Returning to caller}} expected-note {{'p' initialized to a null pointer value}} |
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| 67 | int *q = 0; // expected-note {{'q' initialized to a null pointer value}} |
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| 68 | return q; // expected-note {{Returning null pointer (loaded from 'q')}} |
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| 69 | }(); |
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| 70 | *p = 1; // expected-warning{{Dereference of null pointer (loaded from variable 'p')}} expected-note{{Dereference of null pointer (loaded from variable 'p')}} |
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| 71 | } |
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| 72 | |
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| 73 | void test_block_blockvar() { |
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| 74 | __block int *p; |
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| 75 | ^(){ // expected-note{{Calling anonymous block}} expected-note{{Returning to caller}} |
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| 76 | p = 0; // expected-note{{Null pointer value stored to 'p'}} |
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| 77 | }(); |
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| 78 | *p = 1; // expected-warning{{Dereference of null pointer (loaded from variable 'p')}} expected-note{{Dereference of null pointer (loaded from variable 'p')}} |
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| 79 | } |
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| 80 | |
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| 81 | void test_block_arg() { |
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| 82 | int *p; |
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| 83 | ^(int **q){ // expected-note{{Calling anonymous block}} expected-note{{Returning to caller}} |
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| 84 | *q = 0; // expected-note{{Null pointer value stored to 'p'}} |
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| 85 | }(&p); |
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| 86 | *p = 1; // expected-warning{{Dereference of null pointer (loaded from variable 'p')}} expected-note{{Dereference of null pointer (loaded from variable 'p')}} |
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| 87 | } |
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| 88 | |
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| 89 | |
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