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A synchronized statement on a static guard should lock an instance guard instead.
Concurrency is an important but complex aspect of modern software. As a consequence, it is often used in an incorrect way, also because the subtleties of the Java memory model are not always understood. This checker identifies a large class of common programming errors due to incorrect uses of concurrency primitives, such as incorrect implementations of the singleton pattern and incorrect uses of the volatile field modifier, whose goal is to publish a field update to all executing cores. The latter, however, has a cost in terms of execution time.
| Class Name | Synchronization on static (Java) | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Significance | reliability | |||||||||||||||
| Mnemonic | JAVA.CONCURRENCY.LOCK.STATIC | |||||||||||||||
| Categories |
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| Availability | Available for Java and Kotlin. |
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| Enabling | Checks for this warning class are enabled by
default. To disable them, add the following WARNING_FILTER rule to the
project configuration file.
WARNING_FILTER += discard class="Synchronization on static (Java)" |
Check if the warnings correspond to actual possible errors for a concurrent execution of the program.
The following configuration file parameters affect checks for this warning class.
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