| FBT(4D) | Devices | FBT(4D) |
fbt - DTrace function boundary tracing provider
The fbt driver is a DTrace dynamic tracing provider that performs dynamic instrumentation at function boundaries in the kernel.
The function is the fundamental unit of program text. In a well-designed system, the function performs a discrete and well-defined operation on a specified object or series of like objects. Most functions are implemented by themselves calling functions on encapsulated objects, but some functions —so-called "leaf functions" — are implemented without making further function calls. The Function Boundary Tracing fbt provider contains a mechanism for instrumenting the vast majority of functions in the kernel and offering the instrumentation as a set of DTrace probes.
The fbt driver is not a public interface and you access the instrumentation offered by this provider through DTrace. Refer to the Dynamic Tracing Guide for a description of the public documented interfaces available for the DTrace facility and the probes offered by the fbt provider.
See attributes(7) for a description of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| Interface Stability | Private |
dtrace(4D), attributes(7), dtrace(8)
Dynamic Tracing Guide:
https://illumos.org/books/dtrace/
| December 10, 2017 | OmniOS |