reference, declarationdefinition
definition → references, declarations, derived classes, virtual overrides
reference to multiple definitions → definitions
unreferenced
    1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93
   94
   95
   96
   97
   98
   99
  100
  101
  102
  103
  104
  105
  106
  107
  108
  109
  110
  111
  112
  113
  114
  115
  116
  117
  118
  119
  120
  121
  122
  123
  124
  125
  126
  127
  128
  129
  130
  131
  132
  133
  134
  135
  136
// 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
}