dereferencing null pointer 文心快码 什么是空指针(Null Pointer)? 空指针是一个不指向任何有效内存地址的指针。在C和C++中,空指针通常被初始化为NULL(在C++11及以后,推荐使用nullptr),表示该指针不指向任何对象或数组。 cpp int* ptr = nullptr; // ptr 是一个空指针 描述空指针解引用(Derefe
MyFirstApp.exe!WinMainCRTStartup() Line 189 C kernel32.dll!7c817077() [Frames below may be incorrect and/or missing, no symbols loaded for kernel32.dll] After a lot of reading, I have concluded that I am dereferencing a Null Pointer and then trying to use it after this. However, no...
最主要的原因是在TAU G2中,类或结构体变量都是看作指针的,如果在WATCH窗口看这些变量,在访问变量前,它们都是null,而在赋值之后会显示变量的地址,这和C语言对指针变量的处理基本相同。所以在给这些变量第1次赋值的时候就会报告访问空指针。如果想避免这个问题,就应该在赋值前先使用new关键词分配空间。如: CArray<...
void f(bool b) { int Arr[4] = {}; int* PArr[4] = {}; for (int i = 0; i < g(b); ++i) PArr[i] = &Arr[i]; for (int j = 0; j < g(b); ++j) *PArr[j] = 5; } results in Source.cpp(11): warning C6011: Dereferencing NULL pointer 'PArr[j]'. Tested ...
{ InputType* Outer = Current->GetOuter(); if (Outer) { Stack.push_back(Current); Current = Outer; continue; } Current->GetOuter(); // spurious warning C28182: Dereferencing NULL pointer if (! Stack.empty()) { Current = Stack.back(); Stack.pop_back();...
I have the following lines which returned me C6011 warning, how can I solve this warning?Copier WCHAR id[100]; HRESULT Foo::get_Id(WCHAR** get_IdResult) { *get_IdResult = id; //C6011 warning here... return S_OK; } Thanks....
最主要的原因是在TAU G2中,类或结构体变量都是看作指针的,如果在WATCH窗口看这些变量,在访问变量前,它们都是null,而在赋值之后会显示变量的地址,这和C语言对指针变量的处理基本相同。所以在给这些变量第1次赋值的时候就会报告访问空指针。如果想避免这个问题,就应该在赋值前先使用new关键词分配空间。如: ...
最主要的原因是在TAU G2中,类或结构体变量都是看作指针的,如果在WATCH窗口看这些变量,在访问变量前,它们都是null,而在赋值之后会显示变量的地址,这和C语言对指针变量的处理基本相同。所以在给这些变量第1次赋值的时候就会报告访问空指针。如果想避免这个问题,就应该在赋值前先使用new关键词分配空间。如: ...
Problem: Coverity warns about dereferencing NULL pointer. Solution: Bail out if vim_strrchr() returns NULL. *** CID 1616019: (NULL_RETURNS) /src/help.c: 834 in fix_help_buffer() 828 ...
Null Pointer Dereferencing Causes Undefined BehaviorScore: 3.8/5 (60 votes)I have unintentionally raised a large debate recently concerning the question if it is legal in C/C++ to use the &P->m_foo expression with P being a null pointer. The programmers' community divided into two camps. ...