1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 | // RUN: %clang_analyze_cc1 -analyzer-checker=core,alpha.core,debug.ExprInspection -verify -x c %s // RUN: %clang_analyze_cc1 -analyzer-checker=core,alpha.core,debug.ExprInspection -verify -x c++ -analyzer-config c++-inlining=constructors %s // RUN: %clang_analyze_cc1 -analyzer-checker=core,alpha.core,debug.ExprInspection -DINLINE -verify -x c %s // RUN: %clang_analyze_cc1 -analyzer-checker=core,alpha.core,debug.ExprInspection -DINLINE -verify -x c++ -analyzer-config c++-inlining=constructors %s void clang_analyzer_eval(int); struct S { int field; #if __cplusplus const struct S *getThis() const { return this; } const struct S *operator +() const { return this; } bool check() const { return this == this; } bool operator !() const { return this != this; } int operator *() const { return field; } #endif }; #if __cplusplus const struct S *operator -(const struct S &s) { return &s; } bool operator ~(const struct S &s) { return (&s) != &s; } #endif #ifdef INLINE struct S getS() { struct S s = { 42 }; return s; } #else struct S getS(); #endif void testAssignment() { struct S s = getS(); if (s.field != 42) return; clang_analyzer_eval(s.field == 42); // expected-warning{{TRUE}} s.field = 0; clang_analyzer_eval(s.field == 0); // expected-warning{{TRUE}} #if __cplusplus clang_analyzer_eval(s.getThis() == &s); // expected-warning{{TRUE}} clang_analyzer_eval(+s == &s); // expected-warning{{TRUE}} clang_analyzer_eval(-s == &s); // expected-warning{{TRUE}} clang_analyzer_eval(s.check()); // expected-warning{{TRUE}} clang_analyzer_eval(!s); // expected-warning{{FALSE}} clang_analyzer_eval(~s); // expected-warning{{FALSE}} clang_analyzer_eval(*s == 0); // expected-warning{{TRUE}} #endif } void testImmediateUse() { int x = getS().field; if (x != 42) return; clang_analyzer_eval(x == 42); // expected-warning{{TRUE}} #if __cplusplus clang_analyzer_eval((void *)getS().getThis() == (void *)&x); // expected-warning{{FALSE}} clang_analyzer_eval((void *)+getS() == (void *)&x); // expected-warning{{FALSE}} clang_analyzer_eval((void *)-getS() == (void *)&x); // expected-warning{{FALSE}} clang_analyzer_eval(getS().check()); // expected-warning{{TRUE}} clang_analyzer_eval(!getS()); // expected-warning{{FALSE}} clang_analyzer_eval(~getS()); // expected-warning{{FALSE}} #endif } int getConstrainedField(struct S s) { if (s.field != 42) return 42; return s.field; } int getAssignedField(struct S s) { s.field = 42; return s.field; } void testArgument() { clang_analyzer_eval(getConstrainedField(getS()) == 42); // expected-warning{{TRUE}} clang_analyzer_eval(getAssignedField(getS()) == 42); // expected-warning{{TRUE}} } void testImmediateUseParens() { int x = ((getS())).field; if (x != 42) return; clang_analyzer_eval(x == 42); // expected-warning{{TRUE}} clang_analyzer_eval(getConstrainedField(((getS()))) == 42); // expected-warning{{TRUE}} clang_analyzer_eval(getAssignedField(((getS()))) == 42); // expected-warning{{TRUE}} #if __cplusplus clang_analyzer_eval(((getS())).check()); // expected-warning{{TRUE}} clang_analyzer_eval(!((getS()))); // expected-warning{{FALSE}} clang_analyzer_eval(~((getS()))); // expected-warning{{FALSE}} #endif } //-------------------- // C++-only tests //-------------------- #if __cplusplus void testReferenceAssignment() { const S &s = getS(); if (s.field != 42) return; clang_analyzer_eval(s.field == 42); // expected-warning{{TRUE}} clang_analyzer_eval(s.getThis() == &s); // expected-warning{{TRUE}} clang_analyzer_eval(+s == &s); // expected-warning{{TRUE}} clang_analyzer_eval(s.check()); // expected-warning{{TRUE}} clang_analyzer_eval(!s); // expected-warning{{FALSE}} clang_analyzer_eval(~s); // expected-warning{{FALSE}} clang_analyzer_eval(*s == 42); // expected-warning{{TRUE}} } int getConstrainedFieldRef(const S &s) { if (s.field != 42) return 42; return s.field; } bool checkThis(const S &s) { return s.getThis() == &s; } bool checkThisOp(const S &s) { return +s == &s; } bool checkThisStaticOp(const S &s) { return -s == &s; } void testReferenceArgument() { clang_analyzer_eval(getConstrainedFieldRef(getS()) == 42); // expected-warning{{TRUE}} clang_analyzer_eval(checkThis(getS())); // expected-warning{{TRUE}} clang_analyzer_eval(checkThisOp(getS())); // expected-warning{{TRUE}} clang_analyzer_eval(checkThisStaticOp(getS())); // expected-warning{{TRUE}} } int getConstrainedFieldOp(S s) { if (*s != 42) return 42; return *s; } int getConstrainedFieldRefOp(const S &s) { if (*s != 42) return 42; return *s; } void testImmediateUseOp() { int x = *getS(); if (x != 42) return; clang_analyzer_eval(x == 42); // expected-warning{{TRUE}} clang_analyzer_eval(getConstrainedFieldOp(getS()) == 42); // expected-warning{{TRUE}} clang_analyzer_eval(getConstrainedFieldRefOp(getS()) == 42); // expected-warning{{TRUE}} } namespace EmptyClass { struct Base { int& x; Base(int& x) : x(x) {} }; struct Derived : public Base { Derived(int& x) : Base(x) {} void operator=(int a) { x = a; } }; Derived ref(int& a) { return Derived(a); } // There used to be a warning here, because analyzer treated Derived as empty. int test() { int a; ref(a) = 42; return a; // no warning } } #endif |