Module cros_tracing::trace_marker

A wrapper around trace_marker tracing features

Structs

Trace

A trace context obtained from a trace_event!() call.

Enums

TracedCategories

The tracing categories that the trace_marker backend supports.

Statics

CATEGORY_COUNTER

Vector counting how many tracing event contexts are running for each category.

ENABLED_CATEGORIES

Vector used to test if a category is enabled or not for tracing.

EVENT_COUNTER

Sequential identifier for scoped trace events. This unique identifier is incremented for each new trace_event() call.

TRACE_MARKER_FILE 🔒

Functions

init

Initializes the trace_marker backend. It attepts to open the trace_marker file and keep a reference that can be shared throughout the lifetime of the crosvm process.

push_descriptors_internal

Platform-specific implementation of the push_descriptors! macro. If the trace_marker file has been initialized properly, it adds its file descriptor to the list of file descriptors that are allowed to be accessed when the process is jailed in the sandbox.

trace_simple_print_internal

Platform-specific implementation of the trace_simple_print! macro. If tracing is enabled on the system, it writes the given message to the trace_marker file.