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How does this milw0rm heap spraying exploit work?
...inding feature of Microsoft's XML handler, that causes heap memory to be deallocated incorrectly.
Shellcode is machine code that will run when the bug occurs. Spray and memory are just some space allocated on the heap to help the exploitable condition occur.
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STL中map容器使用自定义key类型报错详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...对正在编译的类 模板 实例化“std::_Tmap_traits<_Kty,_Ty,_Pr,_Alloc,_Mfl>”的引用
1> with
1> [
1> _Kty=a,
1> _Ty=int,
1> _Pr=std::less<a>,
1> _Alloc=std::allocator<std::pair<const a,int>>,
1> _Mf...
In what cases do I use malloc and/or new?
I see in C++ there are multiple ways to allocate and free data and I understand that when you call malloc you should call free and when you use the new operator you should pair with delete and it is a mistake to mix the two (e.g. Calling free() on something that was created with the new ...
Which is a better way to check if an array has more than one element?
...languages. Many programmers expect sizeof() to return the amount of memory allocated.
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Bytes of a string in Java
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I was assuming the question was about the number of bytes allocated in memory for a String object. If the question is about the number of bytes required to serialize the String, as others have pointed out, it depends on the encoding used.
– roozbeh
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Is std::vector so much slower than plain arrays?
...d the array only once. Note: when you resize() the vector you are not only allocating the memory but also running through the vector and calling the constructor on each member.
Re-Arranging the code slightly so that the vector only initializes each object once:
std::vector<Pixel> pixels(di...
When vectors are allocated, do they use memory on the heap or the stack?
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vector<Type> vect;
will allocate the vector, i.e. the header info, on the stack, but the elements on the free store ("heap").
vector<Type> *vect = new vector<Type>;
allocates everything on the free store.
vector<Type*> vect;
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Saving image from PHP URL
I need to save an image from a PHP URL to my PC.
Let's say I have a page, http://example.com/image.php , holding a single "flower" image, nothing else. How can I save this image from the URL with a new name (using PHP)?
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Why malloc+memset is slower than calloc?
It's known that calloc is different than malloc in that it initializes the memory allocated. With calloc , the memory is set to zero. With malloc , the memory is not cleared.
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How to add 2 buttons into the UINavigationbar on the right side without IB?
...ith iOS 5+ it's as easy as:
UIBarButtonItem *btnShare = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:@selector(share)];
UIBarButtonItem *btnRefresh = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self ...