![]() ![]() User trace events (generated by the application instrumentation) The events to be traced belong to two classes: In order to be able to record all types of information. ![]() Overwhelming the trace stream and permits focusing on expected information while the second needs comprehensive trace capabilities These two potential uses differ in that the first requires pre-filtering capabilities to avoid One purpose is debugging the possibly pre-instrumented code, while another The tracing functions can serve different purposes. The posix_trace_open() should be used by an analyzer process. The posix_trace_create() and posix_trace_create_withlog() functions should be used by a controller These three logically different operations can be performed by the same process, or can beĪ trace stream identifier can be created by a call to posix_trace_create(), posix_trace_create_withlog(), or posix_trace_open(). When the trace stream has not yet been shut down, but is still recording trace events or after opening a trace log that had been The analyzer process retrieves the traced events either at runtime, These operations can be done for an active trace stream. Start and stop tracing for the trace streamįilter the type of trace events to be recorded, if the Trace Event Filter option is supported ![]() Initialize the attributes of a trace streamĬreate the trace stream (for a specified traced process) using those attributes TheĬontroller process controls the operation of recording the trace events into the trace stream. Trace streams created for that process in which the associated trace event type identifier is not being filtered out. During the execution of the traced process, when a trace point is reached, a trace event is recorded into the The tracing operation relies on three logically different components: the traced process, the controller process, and theĪnalyzer process. The tracing facilities defined in IEEE Std 1003.1-2001 allow a process to select a set of trace event types, toĪctivate a trace stream of the selected trace events as they occur in the flow of execution, and to retrieve the recorded trace Option (and the rest of this section is not further marked for this option). This functionality is dependent on support of the Trace This section describes extensions to support tracing of user applications. ![]()
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