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Windows Driver Kit: Driver Development Tools
Software Tracing FAQ

This section consists of questions frequently asked about software tracing by application programmers and driver developers. Similar questions are grouped into topics to help you find the information that you need.

Tracing Basics

Where are the tracing tools?

Managing Trace Sessions

Can I see trace messages as they are generated?

How do I update the flags in a running trace session?

How do I change the prefix output on every trace line?

What is an autologger?

What is the TMC file?

What are the TraceWPP parameters?

Basic Software Tracing

What is the performance cost of tracing when no one is listening?

Can I tell if my driver is enabled for tracing?

How are flag values assigned?

Where do I put the #include statement for the trace message header file?

What is the text that precedes each trace message?

How do I include the source line number in the trace message prefix?

Systems and Languages

How do I add software tracing to a Windows XP driver?

How do I implement tracing for Windows 2000?

How do I add tracing to a driver or export driver written in C++?

Can I add software tracing to programs written in C++ managed code?

How do I include a trace statement in a C/C++ macro?

How do I use WPP when building in Visual Studio?

Debugging

How do I send trace messages to a kernel debugger?

How do I send trace messages to a user-mode debugger?

How do I debug tracing failures?

How do I enable debugging without starting an ETW trace session?

Customizing Software Tracing

What is the defaultwpp.ini file?

Can I customize DoTraceMessage?

How do I add a prefix and suffix to a trace message?

How do you define custom data types?

What is the syntax of the complex types definition?

Advanced Software Tracing

How do I generate trace messages from a header file?

What happens to NULL strings in tracing code?

How do I trace function entry and exit?

How do I redefine an fprintf function as a tracing call?

Can I initialize software tracing in DllMain?

What are the WPP extended format specification strings?

Can I use enumerations in my tracing code?

What are PRE / POST macros?

How are Trace-If expressions used?

How do I notify a driver when enabling, disabling, or changing certain flags?

How do I use WPP in static libraries?


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