forked from OSchip/llvm-project
105 lines
2.1 KiB
C++
105 lines
2.1 KiB
C++
// RUN: %clang_cc1 -analyze -analyzer-checker=core,debug.ExprInspection -verify %s
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void clang_analyzer_eval(bool);
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typedef struct Opaque *Data;
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struct IntWrapper {
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int x;
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};
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struct Child : public IntWrapper {
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void set() { x = 42; }
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};
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void test(Data data) {
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Child *wrapper = reinterpret_cast<Child*>(data);
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// Don't crash when upcasting here.
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// We don't actually know if 'data' is a Child.
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wrapper->set();
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clang_analyzer_eval(wrapper->x == 42); // expected-warning{{TRUE}}
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}
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namespace PR14872 {
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class Base1 {};
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class Derived1 : public Base1 {};
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Derived1 *f1();
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class Base2 {};
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class Derived2 : public Base2 {};
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void f2(Base2 *foo);
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void f3(void** out)
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{
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Base1 *v;
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v = f1();
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*out = v;
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}
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void test()
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{
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Derived2 *p;
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f3(reinterpret_cast<void**>(&p));
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// Don't crash when upcasting here.
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// In this case, 'p' actually refers to a Derived1.
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f2(p);
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}
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}
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namespace rdar13249297 {
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struct IntWrapperSubclass : public IntWrapper {};
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struct IntWrapperWrapper {
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IntWrapper w;
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};
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void test(IntWrapperWrapper *ww) {
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reinterpret_cast<IntWrapperSubclass *>(ww)->x = 42;
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clang_analyzer_eval(reinterpret_cast<IntWrapperSubclass *>(ww)->x == 42); // expected-warning{{TRUE}}
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clang_analyzer_eval(ww->w.x == 42); // expected-warning{{TRUE}}
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ww->w.x = 0;
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clang_analyzer_eval(reinterpret_cast<IntWrapperSubclass *>(ww)->x == 42); // expected-warning{{FALSE}}
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}
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}
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namespace PR15345 {
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class C {};
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class Base {
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public:
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void (*f)();
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int x;
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};
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class Derived : public Base {};
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void test() {
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Derived* p;
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*(reinterpret_cast<void**>(&p)) = new C;
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p->f();
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// We should still be able to do some reasoning about bindings.
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p->x = 42;
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clang_analyzer_eval(p->x == 42); // expected-warning{{TRUE}}
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};
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}
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int trackpointer_std_addressof() {
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int x;
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int *p = (int*)&reinterpret_cast<const volatile char&>(x);
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*p = 6;
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return x; // no warning
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}
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void set_x1(int *&);
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void set_x2(void *&);
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int radar_13146953(void) {
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int *x = 0, *y = 0;
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set_x1(x);
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set_x2((void *&)y);
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return *x + *y; // no warning
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} |