symbol-escape.cpp
1005 Bytes
// RUN: %clang_analyze_cc1 \
// RUN: -analyzer-checker=core,cplusplus.NewDeleteLeaks \
// RUN: -verify %s
// expected-no-diagnostics: Whenever we cannot evaluate an operation we escape
// the operands. After the evaluation it would be an
// Unknown value and the tracking would be lost.
typedef unsigned __INTPTR_TYPE__ uintptr_t;
class C {};
C *simple_escape_in_bitwise_op(C *Foo) {
C *Bar = new C();
Bar = reinterpret_cast<C *>(reinterpret_cast<uintptr_t>(Bar) & 0x1);
(void)Bar;
// no-warning: "Potential leak of memory pointed to by 'Bar'" was here.
return Bar;
}
C **indirect_escape_in_bitwise_op() {
C *Qux = new C();
C **Baz = &Qux;
Baz = reinterpret_cast<C **>(reinterpret_cast<uintptr_t>(Baz) | 0x1);
Baz = reinterpret_cast<C **>(reinterpret_cast<uintptr_t>(Baz) &
~static_cast<uintptr_t>(0x1));
// no-warning: "Potential leak of memory pointed to by 'Qux'" was here.
delete *Baz;
return Baz;
}