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Tasks (-entry-points)

Specify functions that serve as tasks to your multitasking application

Description

This option is not available for code generated from MATLAB® code or Simulink® models.

Specify functions that serve as tasks to your code. If the function does not exist, the verification warns you and continues the verification.

Set Option

User interface (desktop products only): In your project configuration, the option is available on the Multitasking node. See Dependencies for other options you must also enable.

User interface (Polyspace Platform, desktop products only): In your project configuration, the option is on the Static Analysis tab on the Multitasking node. See Dependencies for other options you must also enable.

Command line and options file: Use the option -entry-points. See Command-Line Information.

Why Use This Option

Use this option when your code is intended for multitasking.

To specify cyclic tasks and interrupts, use the options Cyclic tasks (-cyclic-tasks) and Interrupts (-interrupts). Use this option to specify other tasks.

A Code Prover analysis uses your specifications to determine:

  • Whether a global variable is shared.

    See Global Variables (Polyspace Code Prover).

  • Whether a run-time error can occur.

    For instance, if the operation var++ occurs in the body of a cyclic task and you do not impose a limit on var, the operation can overflow. The analysis detects the possible overflow.

A Bug Finder analysis uses your specifications to look for concurrency defects. For more information, see Concurrency Defects.

Settings

No Default

Enter function names or choose from a list.

  • Click to add a field and enter the function name.

  • Click to list functions in your code. Choose functions from the list.

Dependencies

To enable this option in the user interface of the desktop products, first select the option Configure multitasking manually.

Tips

  • In Code Prover, the functions representing entry points must have the form 

    void functionName (void)

  • If a function func takes arguments or returns a value, you cannot use it directly as an entry point. To use func as an entry point:, call func from a wrapper void-void function and specify the wrapper as an entry point. See Configuring Polyspace Multitasking Analysis Manually.

  • If you specify a function as a task, you must provide its definition. Otherwise, a Code Prover verification stops with the error message:

    task func_name must be a userdef function without parameters

    A Bug Finder analysis continues but does not consider the function as an entry point.

  • If you run a file by file verification in Code Prover, your multitasking options are ignored. See Verify files independently (-unit-by-unit).

  • The Polyspace® multitasking analysis assumes that a task cannot interrupt itself.

Command-Line Information

Parameter: -entry-points
No Default
Value: function1[,function2[,...]]
Example (Bug Finder): polyspace-bug-finder -sources file_name -entry-points func_1,func_2
Example (Code Prover): polyspace-code-prover -sources file_name -entry-points func_1,func_2
Example (Bug Finder Server): polyspace-bug-finder-server -sources file_name -entry-points func_1,func_2
Example (Code Prover Server): polyspace-code-prover-server -sources file_name -entry-points func_1,func_2

See Also

| | | | (Polyspace Code Prover)

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