在C 语言中,"undefined behavior"(未定义行为)是指程序的行为在 C 语言标准中没有明确定义,因此可以表现为任何结果。 这意味着当程序出现未定义行为时,它可能会产生不可预测的结果,包括程序崩溃、数据损坏、安全漏洞,甚至可能看起来正常运行。 未定义行为是C语言中一个重要的概念,因为它涉及到程序的正确性和安全性...
在C 语言中,"undefined behavior"(未定义行为)是指程序的行为在 C 语言标准中没有明确定义,因此可以表现为任何结果。 这意味着当程序出现未定义行为时,它可能会产生不可预测的结果,包括程序崩溃、数据损坏、安全漏洞,甚至可能看起来正常运行。 未定义行为是C语言中一个重要的概念,因为它涉及到程序的正确性和安全性...
第一,我们的C语言,是有国际标准的,标准,是语言的蓝图,也是灵魂和基石;编译器,是语言的实现,理论上,对于标准中任何明确规定的条款,都应该落实,否则,就不是C编译器;C程序,也就是.c文件和.h文件,是C语言的应用。这一点,是正确理解undefined behavior的大前提。 第二,undefined behavior是从标准的角度而言的。所...
点击C/C++ 中的未定义行为(Undefined Behavior, UB)查看全文。
The C/C++ code in my project is not behaving as I expected. After investigating the issue, I have realised that my code has "undefined behavior". What does this mean, and what implications does it have for my project? Will my code continue to behave in the same manner if I change any...
3.The LLVM Project Blog: What Every C Programmer Should Know About Undefined Behavior #3/3 4.Undefined behavior can result in time travel (among other things, but time travel is the funkiest) 5.Understanding Integer Overflow in C/C++
Undefined behavior From cppreference.com <c |language The C language standard precisely specifies theobservable behaviorof C language programs, except for the ones in the following categories: undefined behavior- there are no restrictions on the behavior of the program. Examples of undefined ...
This might be an optimization bug in the VS 17.10.3 arm64 C++ compiler or potentially an undefined behavior in the source code. This doesn’t happen with the VS 17.9.6 C++ compiler or the X64 C++ compiler. >where cl C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tool...
TemplateBuf and ByteTemplate are implemented as self-referential structs, but their current implementation is unsound and contains undefined behavior. According to my analysis the following issues ...
If either dest or src is aninvalid or null pointer, the behavior is undefined, even if count is zero. Although there're no mention in creference about having src and count both zero, I assume it's also an undefined behaviour. Steps to Reproduce ...