v25.0 - 2022-04-01:
Tracing service and probes:
* Added prebuilts for mac-arm64.
* Removed merged trace and config protos from Bazel. Embedder should
instead depend on the non-merged proto targets.
* Added FtraceConfig.disable_generic_events. If set, the ftrace data source
will not emit events for which it doesn't have a compile-time proto
message.
* Added ingestion support for cros_ec (CrOS sensors) ftrace events.
* Added ingestion support for kvm trace events.
* Added reporting of atrace failures. Now they are bubbled up to the UI
rather than causing atrace data to be silently missing.
Trace Processor:
* Added prebuilts for mac-arm64.
* Changed LIKE comparisions to be case-insenstive. This reverts the change
introduced in v22. GLOB should be used where case senstive searches are
desired; built-in metrics continue to require the use of GLOB.
* Added an optional dependency from trace processor onto a subset of
sources from llvm-project for function name demangling. Bazel embedders
might need to update their PERFETTO_CONFIG in perfetto_cfg.bzl to opt in
or out of the new dependency. See
perfetto/bazel/standalone/perfetto_cfg.bzl for details.
UI:
* Added flow arrows between binder transaction pairs (request/reply
and async send/async recv).
SDK:
* Added support for writing typed proto messages inside DebugAnnotations.
* Added support for delta encoding of timestamps for TrackEvents.
To disable it, refer to `disable_incremental_timestamps` flag in
`track_event_config.proto`.
Tools:
* Added support of gzip-compressed traces to traceconv.
* Changed `traceconv text` to use an internal proto->pbtx converter rather
than relying on libprotobuf. It could cause some small divergencies in the
output format vs past releases.
* Added tools/cpu_profile helper script to capture traces with callstack
samples.
