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What do you mean by race condition How does it occur explain with the help of an example?
A race condition occurs when a software program depends on the timing of one or more processes to function correctly. If a program relies on threads that run in an unpredictable sequence, a race condition may occur. A simple example is a logic gate that handles boolean values.
What is a race condition provide an example?
A simple example of a race condition is a light switch. In computer memory or storage, a race condition may occur if commands to read and write a large amount of data are received at almost the same instant, and the machine attempts to overwrite some or all of the old data while that old data is still being read.
What do you understand by race condition?
A race condition or race hazard is the condition of an electronics, software, or other system where the system’s substantive behavior is dependent on the sequence or timing of other uncontrollable events. It becomes a bug when one or more of the possible behaviors is undesirable.
In which FF race around condition is obtain?
J-K flip-flop
For J-K flip-flop, if J=K=1, and if clk=1 for a long period of time, then output Q will toggle as long as CLK remains high which makes the output unstable or uncertain. This is called a race around condition in J-K flip-flop. We can overcome this problem by making the clock =1 for very less duration.
Is there a way to trigger a race condition in testing?
There’s no good general way to trigger a race condition in testing. Your ONLY hope is to design them completely out of your system. When and if you find that someone else has stuffed one in, you should stake him out an anthill, and then redesign to eliminate it.
How to test multi-threaded race conditions in Java?
The way to do it is to introduce synchronization in your code that are used for testing only. For example, if a race condition occurs when Event X happens in between Event A and Event B, then for testing your application, write some code that waits for Event X to happen after Event A happens.
How to expose a multi-threaded race condition?
Exposing a multi-threading bug requires forcing different threads of execution to perform their steps in a particular interleaved order. Usually this is hard to do without manual debugging or manipulating the code to get some kind of “handle” to control this interleaving.
How does Helgrind watch detect theorical race conditions?
Using that framework, Helgrind watch system calls to infer when an access to a shared variable is not properly protected by a mutual exclusion mechanism. That way it can detect a theorical race condition even if it has not actually happened. Intel sells a very similar tool called Intel Inspector.
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