call-invalidation.cpp revision f8ddc098981d4d85cad4e72fc6dfcfe83b842b66
1// RUN: %clang_cc1 -analyze -analyzer-checker=core,debug.ExprInspection -verify %s 2 3void clang_analyzer_eval(bool); 4 5void usePointer(int * const *); 6void useReference(int * const &); 7 8void testPointer() { 9 int x; 10 int *p; 11 12 p = &x; 13 x = 42; 14 clang_analyzer_eval(x == 42); // expected-warning{{TRUE}} 15 usePointer(&p); 16 clang_analyzer_eval(x == 42); // expected-warning{{UNKNOWN}} 17 18 p = &x; 19 x = 42; 20 clang_analyzer_eval(x == 42); // expected-warning{{TRUE}} 21 useReference(p); 22 clang_analyzer_eval(x == 42); // expected-warning{{UNKNOWN}} 23 24 int * const cp1 = &x; 25 x = 42; 26 clang_analyzer_eval(x == 42); // expected-warning{{TRUE}} 27 usePointer(&cp1); 28 clang_analyzer_eval(x == 42); // expected-warning{{UNKNOWN}} 29 30 int * const cp2 = &x; 31 x = 42; 32 clang_analyzer_eval(x == 42); // expected-warning{{TRUE}} 33 useReference(cp2); 34 clang_analyzer_eval(x == 42); // expected-warning{{UNKNOWN}} 35} 36 37 38struct Wrapper { 39 int *ptr; 40}; 41 42void useStruct(Wrapper &w); 43void useConstStruct(const Wrapper &w); 44 45void testPointerStruct() { 46 int x; 47 Wrapper w; 48 49 w.ptr = &x; 50 x = 42; 51 clang_analyzer_eval(x == 42); // expected-warning{{TRUE}} 52 useStruct(w); 53 clang_analyzer_eval(x == 42); // expected-warning{{UNKNOWN}} 54 55 w.ptr = &x; 56 x = 42; 57 clang_analyzer_eval(x == 42); // expected-warning{{TRUE}} 58 useConstStruct(w); 59 clang_analyzer_eval(x == 42); // expected-warning{{UNKNOWN}} 60} 61 62 63struct RefWrapper { 64 int &ref; 65}; 66 67void useStruct(RefWrapper &w); 68void useConstStruct(const RefWrapper &w); 69 70void testReferenceStruct() { 71 int x; 72 RefWrapper w = { x }; 73 74 x = 42; 75 clang_analyzer_eval(x == 42); // expected-warning{{TRUE}} 76 useStruct(w); 77 clang_analyzer_eval(x == 42); // expected-warning{{UNKNOWN}} 78} 79 80// FIXME: This test is split into two functions because region invalidation 81// does not preserve reference bindings. <rdar://problem/13320347> 82void testConstReferenceStruct() { 83 int x; 84 RefWrapper w = { x }; 85 86 x = 42; 87 clang_analyzer_eval(x == 42); // expected-warning{{TRUE}} 88 useConstStruct(w); 89 clang_analyzer_eval(x == 42); // expected-warning{{UNKNOWN}} 90} 91 92