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Solaris Dynamic Tracing Guide
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Document Information

Preface

1.  Introduction

2.  Types, Operators, and Expressions

3.  Variables

4.  D Program Structure

5.  Pointers and Arrays

6.  Strings

7.  Structs and Unions

8.  Type and Constant Definitions

9.  Aggregations

10.  Actions and Subroutines

11.  Buffers and Buffering

12.  Output Formatting

13.  Speculative Tracing

14.  dtrace(1M) Utility

15.  Scripting

16.  Options and Tunables

17.  dtrace Provider

18.  lockstat Provider

19.  profile Provider

20.  fbt Provider

21.  syscall Provider

22.  sdt Provider

23.  sysinfo Provider

24.  vminfo Provider

25.  proc Provider

26.  sched Provider

27.  io Provider

28.  mib Provider

29.  fpuinfo Provider

30.  pid Provider

31.  plockstat Provider

32.  fasttrap Provider

33.  User Process Tracing

34.  Statically Defined Tracing for User Applications

35.  Security

36.  Anonymous Tracing

Anonymous Enablings

Claiming Anonymous State

Anonymous Tracing Examples

37.  Postmortem Tracing

38.  Performance Considerations

39.  Stability

40.  Translators

41.  Versioning

Glossary

Index

Anonymous Enablings

To create an anonymous enabling, use the -A option with a dtrace(1M) invocation that specifies the desired probes, predicates, actions and options. dtrace will add a series of driver properties representing your request to the dtrace(7D) driver's configuration file, typically /kernel/drv/dtrace.conf. These properties will be read by the dtrace(7D) driver when it is loaded. The driver will enable the specified probes with the specified actions, and create an anonymous state to associate with the new enabling. Normally, the dtrace(7D) driver is loaded on-demand, as are any drivers that act as DTrace providers. To allow tracing during boot, the dtrace(7D) driver must be loaded as early as possible. dtrace adds the necessary forceload statements to /etc/system (see system(4)) for each required DTrace provider and for dtrace(7D) itself.

Thereafter, when the system boots, a message is emitted by dtrace(7D) to indicate that the configuration file has been successfully processed.

All options may be set with an anonymous enabling, including buffer size, dynamic variable size, speculation size, number of speculations, and so on.

To remove an anonymous enabling, specify -A to dtrace without any probe descriptions.