protozero: Make ScatteredStreamMemoryDelegate production-ready

Currently, this delegate is only used in testing, but we'd like to use
it e.g. for tracing to a heap buffer before the perfetto service is
available.

This patch makes the delegate compatible with chromium's
HeapScatteredStreamWriterDelegate and renames it to ScatteredHeapBuffer.
In particular, it adds a way to obtain the chunk data without copying
them into a stitched vector.

As a follow-up, we can then remove chromium's HSSWD and replace it with
perfetto's SHB.

Change-Id: I4a4c07f81edd7d9ff5ec8b3f977d72ca1668c09d
12 files changed
tree: aecdf0327e97b1b76a9b0ca7b3fd59b9682e3a1b
  1. build_overrides/
  2. buildtools/
  3. debian/
  4. docs/
  5. gn/
  6. include/
  7. infra/
  8. protos/
  9. src/
  10. test/
  11. tools/
  12. ui/
  13. .clang-format
  14. .gitignore
  15. .gn
  16. .travis.yml
  17. Android.bp
  18. Android.bp.extras
  19. BUILD.gn
  20. codereview.settings
  21. heapprofd.rc
  22. MODULE_LICENSE_APACHE2
  23. NOTICE
  24. OWNERS
  25. perfetto.rc
  26. PRESUBMIT.py
  27. README.chromium
  28. README.md
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.

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.