Grpc Graph - fix use after free

GrpcGraph initializes StreamSetObserver - which triggers a thread to
notify GrpcGraph of termination. If GrpcGraph is destroyed, this will
result in use after free. Fix this by enforcing that GrpcGraph object is
not destroyed before StreamSetObserver.

Bug: 170407229
Test: build, unit test and fuzz test
Change-Id: I8b24f72af60c441ebd7a31939769c46589431cfe
4 files changed
tree: 52c6f1e9d24700c4e4e21085b6f76a24e895b97a
  1. car-bugreportd/
  2. car-internal-lib/
  3. car-lib/
  4. car-maps-placeholder/
  5. car-systemtest-lib/
  6. car-test-lib/
  7. car-usb-handler/
  8. car_product/
  9. cpp/
  10. evs/
  11. experimental/
  12. FrameworkPackageStubs/
  13. obd2-lib/
  14. packages/
  15. procfs-inspector/
  16. service/
  17. tests/
  18. tools/
  19. user/
  20. vehicle-hal-support-lib/
  21. .clang-format
  22. .gitignore
  23. Android.mk
  24. CleanSpec.mk
  25. CPPLINT.cfg
  26. OWNERS
  27. PREUPLOAD.cfg
  28. README.md
  29. TEST_MAPPING
README.md

Native (C++) code format is required to be compatible with .clang-format file. Run

git clang-format --style=file --extension='h,cpp,cc' HEAD~

Note that clang-format is not desirable for Android java files. Therefore the command line above is limited to specific extensions.