forked from OSchip/llvm-project
127 lines
2.6 KiB
C++
127 lines
2.6 KiB
C++
// RUN: %clang_analyze_cc1 -analyzer-checker=core -verify %s
|
|
|
|
|
|
static const unsigned long long scull = 0;
|
|
void static_int()
|
|
{
|
|
*(int*)scull = 0; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
const unsigned long long cull = 0;
|
|
void const_int()
|
|
{
|
|
*(int*)cull = 0; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
static int * const spc = 0;
|
|
void static_ptr()
|
|
{
|
|
*spc = 0; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
int * const pc = 0;
|
|
void const_ptr()
|
|
{
|
|
*pc = 0; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
const unsigned long long cull_nonnull = 4;
|
|
void nonnull_int()
|
|
{
|
|
*(int*)(cull_nonnull - 4) = 0; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
int * const pc_nonnull = (int*)sizeof(int);
|
|
void nonnull_ptr()
|
|
{
|
|
*(pc_nonnull - 1) = 0; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
int * const constcast = const_cast<int * const>((int*)sizeof(int));
|
|
void cast1()
|
|
{
|
|
*(constcast - 1) = 0; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
int * const recast = reinterpret_cast<int*>(sizeof(int));
|
|
void cast2()
|
|
{
|
|
*(recast - 1) = 0; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
int * const staticcast = static_cast<int * const>((int*)sizeof(int));
|
|
void cast3()
|
|
{
|
|
*(staticcast - 1) = 0; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
struct Foo { int a; };
|
|
Foo * const dyncast = dynamic_cast<Foo * const>((Foo*)sizeof(Foo));
|
|
void cast4()
|
|
{
|
|
// Do not handle dynamic_cast for now, because it may change the pointer value.
|
|
(dyncast - 1)->a = 0; // no-warning
|
|
}
|
|
|
|
typedef int * const intptrconst;
|
|
int * const funccast = intptrconst(sizeof(int));
|
|
void cast5()
|
|
{
|
|
*(funccast - 1) = 0; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
struct S1
|
|
{
|
|
int * p;
|
|
};
|
|
const S1 s1 = {
|
|
.p = (int*)sizeof(int)
|
|
};
|
|
void conststruct()
|
|
{
|
|
*(s1.p - 1) = 0; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
struct S2
|
|
{
|
|
int * const p;
|
|
};
|
|
S2 s2 = {
|
|
.p = (int*)sizeof(int)
|
|
};
|
|
void constfield()
|
|
{
|
|
*(s2.p - 1) = 0; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
int * const parr[1] = { (int*)sizeof(int) };
|
|
void constarr()
|
|
{
|
|
*(parr[0] - 1) = 0; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
struct S3
|
|
{
|
|
int * p = (int*)sizeof(int);
|
|
};
|
|
void recordinit()
|
|
{
|
|
S3 s3;
|
|
*(s3.p - 1) = 0; // expected-warning{{Dereference of null pointer}}
|
|
}
|
|
|
|
extern int ext_int;
|
|
|
|
void update_original_declaration() {
|
|
ext_int = 2;
|
|
}
|
|
|
|
extern int ext_int;
|
|
|
|
int test_redeclaration() {
|
|
ext_int = 1;
|
|
update_original_declaration();
|
|
int int_int = 3 / (ext_int - 1); // no-warning
|
|
return int_int / (ext_int - 2); // expected-warning{{Division by zero}}
|
|
}
|