Examples of using Undefined behavior in English and their translations into Korean
{-}
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Colloquial
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Ecclesiastic
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Ecclesiastic
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Programming
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Computer
It's undefined behavior.
Using the inappropriate form results in undefined behavior.
If they are not, undefined behavior will result.
Hello""Hello"(this is legal,but results in undefined behavior)[119].
Does“Undefined Behavior” really permit*anything* to happen?
This code leads to undefined behavior.
The memory model defined in the C11 and C++11 standards specify that a C or C++ program containing a data race has undefined behavior.
When your code has undefined behavior, you get a seg fault and corrupted data.
Why can't you warn when optimizing based on undefined behavior?
When Jeff Dean's code has undefined behavior, a unicorn rides in on a rainbow and gives everybody free ice cream.
Otherwise, if free(ptr)has already been called before, undefined behavior occurs.
Undefined behavior exists in C-based languages because the designers of C wanted it to be an extremely efficient low-level programming language.
There is No Reliable Way to Determine if a Large Codebase Contains Undefined Behavior.
Undefined behavior exists in C-based languages because the designers of C wanted it to be an extremely efficient low-level programming language.
Both LLVM IR and the C programming language have the concept of"undefined behavior".
Working" code that uses undefined behavior can"break" as the compiler evolves or changes.
The third step is that the LLVM optimizer generally takes much less liberty with undefined behavior than it could.
Ultimately, undefined behavior is valuable to the optimizer because it is saying"this operation is invalid- you can assume it never happens".
The Clang Static Analyzer performs a much deeper analysis to try to find bugs(including use of undefined behavior, like null pointer dereferences).
In Part 1 of our series, we discussed what undefined behavior is, and how it allows C and C++ compilers to produce higher performance applications than"safe" languages.
The things I will describe are both undefined according to the standard and treated as undefined behavior by both of these compilers in their default modes.
They require knowledge of evaluation order, and often lead to subtle bugs and undefined behavior in C and C++. x= x+ 1 or x+= 1 is only slightly longer, but unambiguous.