英語 での Undefined behavior の使用例とその 日本語 への翻訳
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Tags undefined behavior.
So the following code is undefined behavior:.
Undefined behavior and sequence points.
Use of other offsets causes undefined behavior.
The undefined behavior reveals itself in the following way.
人々も翻訳します
For example, the following code has undefined behavior:.
Does“Undefined Behavior” really permit*anything* to happen?
For example, the following code has undefined behavior:.
The undefined behavior and unspecified behavior both are different.
Why can't you warn when optimizing based on undefined behavior?
I like to call this"Why undefined behavior is often a scary and terrible thing for C programmers".:-.
When does invoking amember function on a null instance result in undefined behavior?
Invoking Undefined Behavior gives the compiler full rights to do arbitrarily bad things to your program.
Integer multiplication routine had a code that depended on undefined behavior of C; it worked on gcc but revealed the bug on clang-llvm.
Undefined behavior is the enemy of safety, and developer mistakes should be caught before software is in production.
Just like with pointers,a programmer's error in using iterators leads to undefined behavior(see the swap_range example).
Some cases of undefined behavior(including the one being discussed here) are closely related to the notion of a"sequence point".
Do not change the thread affinity orpriority of threads that are created by the runtime because that might cause undefined behavior.
The Old New Thing: Undefined behavior can result in time travel(among other things, but time travel is the funkiest).
While neither is"the right goal to aim for," if you're aC programmer you really should understand what undefined behavior is.
I hope this discussion helps explain some of the issues behind undefined behavior in C, at least from a compiler implementer's viewpoint.
Undefined Behavior I will be going over the safety of unsafe Swift today, and we begin with undefined behavior.
NOTE: ViewController for playAd method should be the top-most ViewController in view hierarchy,otherwise it will lead to 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.
The short version of this excellent article is that many seeminglyreasonable things in C actually have undefined behavior, and this is a common source of bugs in programs.
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.
Passing a size which is not an integral multiple of alignment or an alignment which is not valid or not supported by the implementation causes the function to fail and return a null pointer(C11, as published,specified undefined behavior in this case, this was corrected by DR 460).
In short, undefined behavior destroys software schedule and Swift goes to great lengths in order to ensure safety for your code, and it does that by not allowing direct access to memory, or access to uninitialized variables and that's by default.
At 324,the OS determines if there is any consistent unusual behavior or undefined behavior for four or more seconds, such as, for example, failing to detect the fingerprint(s), the palmprint, or no handprint on the touchscreen.
Before getting into the dark side of undefined behavior and LLVM's policy and behavior when used as a C compiler, I thought it would be helpful to consider a few specific cases of undefined behavior, and talk about how each enables better performance than a safe language like Java.