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