TrackEvent: Add entry point for track+timestamp+lambda

This patch introduces a new entry point for TRACE_EVENT and
TRACE_INSTANT that can be used to specify a new event with a
custom track, a custom timestamp and a lambda function.

This could be used to record events on different track
that are not happening on the CPU.
An example could be a vsync from a display:

    TRACE_EVENT_INSTANT("display", "vsync",
        perfetto::Track(890), timestamp,
        [](perfetto::EventContext ctx){});

Bug: None
Test: PerfettoApiTest.TrackEventCustomTrackAndTimestamp
Change-Id: I6020f69f4ad6a6f09238fafc0573a5d9203d5df0
2 files changed
tree: 7f2e1740cf562127aaa8b3d8fdfef0cd9081f53e
  1. bazel/
  2. build_overrides/
  3. buildtools/
  4. debian/
  5. docs/
  6. gn/
  7. include/
  8. infra/
  9. protos/
  10. src/
  11. test/
  12. tools/
  13. ui/
  14. .clang-format
  15. .gitignore
  16. .gn
  17. .style.yapf
  18. Android.bp
  19. Android.bp.extras
  20. BUILD
  21. BUILD.extras
  22. BUILD.gn
  23. codereview.settings
  24. heapprofd.rc
  25. LICENSE
  26. MODULE_LICENSE_APACHE2
  27. NOTICE
  28. OWNERS
  29. perfetto.rc
  30. PRESUBMIT.py
  31. README.chromium
  32. README.md
  33. TEST_MAPPING
  34. traced_perf.rc
  35. WORKSPACE
README.md

Perfetto - Performance instrumentation and tracing

Perfetto is an open-source project for performance instrumentation and tracing of Linux/Android/Chrome platforms and user-space apps.

See www.perfetto.dev for docs.

Contributing

See /docs/contributing.md for instructions.

The source-of-truth repo is Android's Gerrit. The GitHub repo is a read-only mirror.

Bugs

  • For bugs affecting Android or the tracing internals use the internal bug tracker (go/perfetto-bugs).
  • For bugs affecting Chrome use http://crbug.com, Component:Speed>Tracing label:Perfetto.

Community

You can reach us on our Discord channel. If you prefer using IRC we have an experimental Discord <> IRC bridge synced with #perfetto-dev on Freenode.