2 D Programming Language

D is a systems programming language that enables you to interface with the operating system application programming interface (APIs) and with the hardware. This chapter describes the overall structure of a D program and features for constructing probe descriptions that match more than one probe. You can also use the C preprocessor cpp with D programs.

This chapter contains the following topics:

• D Program Structure

• Compilation and Instrumentation in DTrace

• Variables and Arithmetic Expressions in DTrace

• Output Formatting in DTrace

• Arrays in DTrace

• External Symbols and Types in DTrace

• Types, Operators, and Expressions in DTrace

• Variables in DTrace

• Pointers and Arrays in DTrace

• Strings in DTrace

• Structs and Unions in DTrace

• Type and Constant Definitions in DTrace