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