Xcode解决消毒剂实际警告的问题是什么？

Question

Xcode 7 has a new feature called address sanitizer, which is introduced in the release notes with this short description:

• Address sanitizer points out code that may crash at runtime even when you cannot reproduce yourself

Apart from the ironic wording, I believe what is meant here is that the address sanitizer is supposed to detect (irreproducible) problems that may result in access violations or other fatal application errors.

Apple Developer adds more information making it clear that this is a diagnostic tool (not a compiler feature) intended to catch memory corruption issues at debug time.

I did a few tests on my own but couldn't put together a piece of code that would trigger the address sanitizer when run. Could somebody provide me with an example? I was looking for a sample in C, but objective C would be fine as well.

Answer 1

Here is more information about the address sanitizer and here's a simple test:

char test()
{
    char buffer[4] = { 9, 8, 7, 6 };
    unsigned index = 4;
    return buffer[index];
}