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// RUN: %clang_analyze_cc1 -std=c++14 \
// RUN: -analyzer-checker=core.CallAndMessage \
// RUN: -analyzer-config suppress-null-return-paths=false \
// RUN: -verify %s
// RUN: %clang_analyze_cc1 -std=c++14 \
// RUN: -analyzer-checker=core.CallAndMessage \
// RUN: -DSUPPRESSED \
// RUN: -verify %s
#ifdef SUPPRESSED
// expected-no-diagnostics
#endif
#include <stdint.h>
#include "../Inputs/system-header-simulator-cxx.h"
void error();
void *malloc(size_t);
// From llvm/include/llvm/Support/MathExtras.h
inline uintptr_t alignAddr(const void *Addr, size_t Alignment) {
return (((uintptr_t)Addr + Alignment - 1) & ~(uintptr_t)(Alignment - 1));
}
inline size_t alignmentAdjustment(const void *Ptr, size_t Alignment) {
return alignAddr(Ptr, Alignment) - (uintptr_t)Ptr;
}
// From llvm/include/llvm/Support/MemAlloc.h
inline void *safe_malloc(size_t Sz) {
void *Result = malloc(Sz);
if (Result == nullptr)
error();
return Result;
}
// From llvm/include/llvm/Support/Allocator.h
class MallocAllocator {
public:
void *Allocate(size_t Size, size_t /*Alignment*/) {
return safe_malloc(Size);
}
};
class BumpPtrAllocator {
public:
void *Allocate(size_t Size, size_t Alignment) {
BytesAllocated += Size;
size_t Adjustment = alignmentAdjustment(CurPtr, Alignment);
size_t SizeToAllocate = Size;
size_t PaddedSize = SizeToAllocate + Alignment - 1;
uintptr_t AlignedAddr = alignAddr(Allocator.Allocate(PaddedSize, 0),
Alignment);
char *AlignedPtr = (char*)AlignedAddr;
return AlignedPtr;
}
private:
char *CurPtr = nullptr;
size_t BytesAllocated = 0;
MallocAllocator Allocator;
};
// From clang/include/clang/AST/ASTContextAllocate.h
class ASTContext;
void *operator new(size_t Bytes, const ASTContext &C, size_t Alignment = 8);
void *operator new[](size_t Bytes, const ASTContext &C, size_t Alignment = 8);
// From clang/include/clang/AST/ASTContext.h
class ASTContext {
public:
void *Allocate(size_t Size, unsigned Align = 8) const {
return BumpAlloc.Allocate(Size, Align);
}
template <typename T>
T *Allocate(size_t Num = 1) const {
return static_cast<T *>(Allocate(Num * sizeof(T), alignof(T)));
}
private:
mutable BumpPtrAllocator BumpAlloc;
};
// From clang/include/clang/AST/ASTContext.h
inline void *operator new(size_t Bytes, const ASTContext &C,
size_t Alignment /* = 8 */) {
return C.Allocate(Bytes, Alignment);
}
inline void *operator new[](size_t Bytes, const ASTContext &C,
size_t Alignment /* = 8 */) {
return C.Allocate(Bytes, Alignment);
}
// From clang/include/clang/AST/Attr.h
void *operator new(size_t Bytes, ASTContext &C,
size_t Alignment = 8) noexcept {
return ::operator new(Bytes, C, Alignment);
}
class A {
public:
void setValue(int value) { Value = value; }
private:
int Value;
};
void f(const ASTContext &C) {
A *a = new (C) A;
a->setValue(13);
#ifndef SUPPRESSED
// expected-warning@-2 {{Called C++ object pointer is null}}
#endif
}
void g(const ASTContext &C) {
A *a = new (C) A[1];
a[0].setValue(13);
#ifndef SUPPRESSED
// expected-warning@-2 {{Called C++ object pointer is null}}
#endif
}
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